CN218148593U

CN218148593U - Ditch cleaning vehicle

Info

Publication number: CN218148593U
Application number: CN202221783902.3U
Authority: CN
Inventors: 黄锦涛; 黄天明; 林嘉伟; 喻冬; 袁斌; 李宏亮; 谢明鸣; 唐威
Original assignee: Guangdong Provincial Architectural Engineering Machinery Construction Co Ltd
Current assignee: Guangdong Provincial Architectural Engineering Machinery Construction Co Ltd
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2022-12-27
Anticipated expiration: 2032-07-11

Abstract

The utility model discloses a ditch cleaning vehicle, its characterized in that: the cleaning device comprises a movable vehicle body (1), a scraping device (2) and a flushing device (3), wherein the scraping device (2) and the flushing device (3) are arranged on the movable vehicle body (1), the flushing device (3) flushes water from the movable vehicle body (1) to the outer side of the movable vehicle body (1), and the scraping device (2) is arranged in front of the movable vehicle body (1); the scraping device (2) comprises a fixed plate (21) and a movable plate (22), the fixed plate (21) is fixed in front of the movable vehicle body (1), and the movable plate (22) is arranged on the outer side of the fixed plate (21) in a telescopic adjusting mode. The utility model is used for debris such as silt clearance in the ditch.

Description

Ditch cleaning vehicle

Technical Field

The utility model relates to a burnisher equipment technical field, concretely relates to ditch cleaning cart that clean ditch was used.

Background

The urban canal is an important drainage project of a city and is related to the comprehensive drainage capacity and waterlogging prevention capacity of the city. The ditch is long in construction time and is influenced by sundries such as silt carried in rainwater, silt, garbage sundries and the like are easy to accumulate in the ditch, so that the time is continuously passed, the more silt and the more garbage sundries are piled, the ditch is blocked, and the comprehensive drainage capacity of the ditch is influenced. The existing water channel cleaning is carried out manually, tools such as a broom and a shovel are used for manually removing sundries such as sludge in the water channel during cleaning, and then the sundries such as the sludge are removed and then washed manually by using a water pipe.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be to the clean method of ditch not only human labor intensity of operation big, need the manual work to carry out moreover debris and clear away and the ditch washes twice operation process, the ditch clearance more technical problem consuming time provides a ditch cleaning cart that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: a ditch cleaning vehicle comprises a moving vehicle body, a scraping device and a flushing device, wherein the scraping device and the flushing device are arranged on the moving vehicle body, the flushing device flushes water from the moving vehicle body to the outer side of the moving vehicle body, and the scraping device is arranged in front of the moving vehicle body; the scraping device comprises a fixed plate and a movable plate, the fixed plate is fixed in front of the movable vehicle body, and the movable plate is arranged on the outer side of the fixed plate in a telescopic and adjustable mode.

Furthermore, a first fixed sleeve is arranged on the fixed plate, a first telescopic rod is arranged on the movable plate, the first fixed sleeve is matched with the first telescopic rod, one end of the first telescopic rod is inserted into the first fixed sleeve, and the other end of the first telescopic rod is fixed on the movable plate; the first fixing sleeve is provided with a first fixing nut, and the first fixing nut can fix or loosen the first telescopic rod.

Further, the scraping device further comprises a brush, and the brush is detachably arranged on the outer side of the movable plate.

Furthermore, a slot is formed in the outer side of the movable plate, and the brush is inserted into the slot.

Furthermore, the flushing device comprises a high-pressure spray gun, and the high-pressure spray gun is detachably arranged on the fixing plate.

Furthermore, a fixing ring is arranged on the fixing plate, a second fixing nut is arranged on the fixing ring, the high-pressure spray gun is inserted into the fixing ring, and the second fixing nut can fix the high-pressure spray gun in the fixing ring or loosen the high-pressure spray gun from the fixing ring.

Furthermore, the flushing device further comprises a water tank and a high-pressure water pump, the water tank is fixed on the movable vehicle body through a limiting frame, the water tank is communicated with the high-pressure spray gun through a pipeline, and the high-pressure water pump pumps water in the water tank into the high-pressure spray gun.

Further, the movable vehicle body comprises a vehicle seat, a crawler and limiting mechanisms, wherein the crawler is arranged at the bottom of the vehicle seat, and the limiting mechanisms are arranged on two sides of the movable vehicle body in the moving direction; the scraping device and the flushing device are both arranged on the vehicle seat.

Furthermore, the limiting mechanism comprises a second fixed sleeve and a second telescopic rod, and the second telescopic rod is arranged at two ends of the second fixed sleeve in a telescopic manner; the second fixing sleeve is fixed on the saddle, and the direction of the second fixing sleeve is perpendicular to the moving direction of the moving vehicle body.

Furthermore, the limiting mechanism further comprises a spring and a limiting wheel, one end of the second telescopic rod is elastically arranged in the second fixing sleeve through the spring, and the limiting wheel is arranged at one end, far away from the second fixing sleeve, of the second telescopic rod; the second fixing sleeve is provided with an axial through groove, the second telescopic rod is provided with a shifting block, and the shifting block penetrates out of the through groove.

The utility model discloses the beneficial effect who realizes mainly has following several: the scraping device and the flushing device are arranged on the movable vehicle body, and the scraping device is arranged in front of the movable vehicle body, so that the scraping device can be pushed to move forwards in the advancing process of the movable vehicle body, and impurities such as sludge on the bottom and the side wall of the water channel can be scraped by moving the scraping device forwards, so that the impurities such as sludge on the bottom and the side wall of the water channel can be conveniently removed, and the manual labor intensity is low. The flushing device flushes water from the movable vehicle body to the outer side of the movable vehicle body, and the bottom and the side wall of the water channel are flushed by the flushing device, so that sundries in the water channel are cleared more cleanly and thoroughly. And will scrape off device and washing unit setting on removing the automobile body to debris such as silt in can once only accomplishing the ditch clearance and the ditch washes, the ditch clearance consuming time is less, clearance efficiency is high. The scraping device comprises a fixed plate and a movable plate, the fixed plate is fixed in the front of a movable vehicle body, the movable plate is arranged on the outer side of the fixed plate in a telescopic adjusting mode, so that the installation position of the movable plate on the outer side of the fixed plate can be adjusted according to the width of a water channel, the movable plate is just abutted with the side wall of the water channel to remove sundries such as sludge on the inner side wall of the water channel, and the water channel is cleaned more thoroughly and better in cleaning effect.

Drawings

Fig. 1 is a schematic view of the external structure of a ditch cleaning vehicle according to an embodiment of the present invention;

FIG. 2 is a schematic view of the embodiment of the present invention showing the structure of the canal cleaning vehicle when cleaning the canal in the canal;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is an enlarged schematic view of a portion B in fig. 2 (a second fixing sleeve is partially axially cut away).

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1-4, the ditch cleaning vehicle is used for cleaning sundries such as sludge in urban ditches, so that the flues are smooth, and the flood control and drainage capability of the cities is guaranteed. The ditch cleaning cart is including removing automobile body 1, scraping device 2 and washing unit 3, and removal automobile body 1 is the removal structure of ditch cleaning cart, realizes that the ditch cleaning cart removes in ditch 4 through removing automobile body 1 to forego constantly and clear away debris such as silt in ditch 4. The scraping device 2 and the flushing device 3 are arranged on the movable vehicle body 1, the scraping device 2 is arranged in front of the movable vehicle body 1, so that the scraping device 2 can be pushed to move forwards in the advancing process of the movable vehicle body 1, impurities such as sludge on the bottom and the side wall of the water channel 4 can be scraped by the forward movement of the scraping device 2, and the impurities such as the sludge on the bottom and the side wall of the water channel 4 can be conveniently removed, and the manual labor intensity is low. Washing unit 3 washes by water to the removal automobile body 1 outside from removing automobile body 1, washes by water through washing unit 3 and washs ditch 4 bottom and lateral wall for the debris in ditch 4 clear away cleaner thoroughly. And will scrape off device 2 and washing unit 3 and set up on removing automobile body 1 to debris such as silt in can once only accomplishing ditch 4 clear up and the ditch washes, the ditch clearance consuming time is less, the cleaning efficiency is high.

Referring to fig. 1 and 2, the scraping device 2 includes a fixed plate 21 and a movable plate 22, the fixed plate 21 is fixed in front of the movable vehicle body 1, and the movable plate 22 is telescopically adjusted and disposed on the outer side of the fixed plate 21, so that the installation position of the movable plate 22 on the outer side of the fixed plate 21 can be adjusted according to the width of the canal 4, and the movable plate 22 just abuts against the inner side wall of the canal 4 to remove impurities such as sludge on the side wall of the canal 4, so that the canal is cleaned more thoroughly and the cleaning effect is better. Preferably, two movable plates 22 are respectively arranged on two sides of the fixed plate 21, and the two movable plates 22 on two sides of the fixed plate 21 are adjusted to be respectively abutted against the side walls on two sides of the ditch 4 during operation, so that the side walls on two sides of the ditch 4 can be cleaned at one time, and the cleaning efficiency is higher.

Referring to fig. 1 to 3, the telescopic adjustment of the movable plate 22 on the fixed plate 21 may adopt the following structure: the fixed plate 21 is provided with a first fixed sleeve 211, the movable plate 22 is provided with a first telescopic rod 221, the first fixed sleeve 211 is matched with the first telescopic rod 221, namely, the shape and the inner diameter of the inner cavity of the first fixed sleeve 211 are consistent with the shape and the outer diameter of the first telescopic rod 221, so that one end of the first telescopic rod 221 can be just inserted into the first fixed sleeve 211, and the first telescopic rod 221 can be adjusted on the first fixed sleeve 211 in a telescopic manner. The other end of the first telescopic rod 221 is fixed on the movable plate 22, so that the movable plate 22 can be telescopically adjusted on the fixed plate 21. The first fixing sleeve 211 is provided with a first fixing nut 2111, and the first fixing nut 2111 penetrates into the inner cavity of the first fixing sleeve 211 from the outside of the first fixing sleeve 211 and abuts against the first expansion link 221, so that the first expansion link 221 can be fixed or loosened by screwing the first fixing nut 2111, and the movable plate 22 can be conveniently adjusted in position on the fixed plate 21 in a stretching manner. First fixed sleeve 211 preferably adopts square tubular construction, and first telescopic link 221 preferably adopts square bar structure, avoids first telescopic link 221 to take place to rotate when installing in first fixed sleeve 211 for fly leaf 22 is more stable.

Referring to fig. 1, 2 and 4, the scraping device 2 further includes a brush 23, and the brush 23 is detachably disposed outside the movable plate 22, so that impurities such as sludge on the sidewall of the canal 4 can be more thoroughly removed by the scraping device 2. The brush 23 is detachably disposed on the movable plate 22, so that the brush 23 can be replaced with a new one when the old brush 23 is worn and cannot be used. The detachable arrangement of the brush 23 on the movable plate 22 can adopt the following structure: the slot 222 is disposed on the outer side of the movable plate 22, and the brush 23 is inserted into the slot 222, so that the brush 23 can be conveniently detached and replaced from the movable plate 22.

Referring to fig. 1 to 4, before the ditch cleaning vehicle of the present embodiment cleans the ditch 4, the moving vehicle body 1 enters the ditch 4, and the scraping device 2 and the flushing device 3 on the moving vehicle body 1 enter the ditch 4 along with the moving vehicle body 1; the position of the first extension rod 221 on the first fixing sleeve 211 is adjusted according to the width of the canal 4, so that the brush 23 outside the movable plate 22 is just abutted against the inner side wall of the canal 4. When ditch clearing truck cleared up ditch 4, remove automobile body 1 and advance in ditch 4, debris such as silt on the 4 inside walls of ditch are clear away along with the advancing of removing automobile body 1 to the brush 23 in the fly leaf 22 outside, and washing unit 3 spouts the water and washes 4 inside walls of ditch simultaneously for 4 clearances of ditch are more thorough. The moving body 1 passes through the ditch 4 when advancing

Example two

Referring to fig. 1 to 4, the whole of the canal cleaning vehicle of the present embodiment is the same as that of the first embodiment, and the structure of the flushing device 3 is improved on the basis of the first embodiment.

Referring to fig. 1 to 3, the washing device 3 includes a high-pressure spray gun 31, so that the high-pressure spray gun 31 sprays high-pressure water to wash the canal 4, and the effect of removing impurities such as sludge in the canal is better. The high-pressure spray gun 31 is detachably arranged on the fixing plate 21, so that the high-pressure spray gun 31 can be conveniently replaced when damaged; meanwhile, the high-pressure spray gun 31 is arranged on the fixing plate 21, when the movable vehicle body 1 moves forward, the high-pressure spray gun 31 sprays water forwards to flush sundries such as sludge in the water channel, and the cleaning effect is good. The direction of water spray from high pressure lance 31 is preferably adjustable so that the direction of water spray from high pressure lance 31 can be adjusted as required by the location of the wash in the canal.

Referring to fig. 1 to 3, the high pressure spray gun 31 may be detachably disposed in the following structure: be provided with solid fixed ring 311 on the fixed plate 21, gu be provided with second fixation nut 3111 on the fixed ring 311, high-pressure spray gun 31 is pegged graft in solid fixed ring 311, second fixation nut 3111 is worn to gu fixed ring 311 inboard and high-pressure spray gun 31 butt from solid fixed ring 311 outside to tighten second fixation nut 3111 and can fix high-pressure spray gun 31 in gu fixed ring 311, loosen second fixation nut 3111 and can loosen high-pressure spray gun 31 from gu fixed ring 311 in, make things convenient for high-pressure spray gun 31 telescopic adjusting position on removing automobile body 1 from this, better wash ditch 4.

Referring to fig. 1 to 3, the flushing device 3 further includes a water tank 32 and a high pressure water pump 33, the water tank 32 is fixed on the movable vehicle body 1 through a limiting frame 321, the water tank 32 is fixed on the movable vehicle body 1 through a screw when the water tank 32 is mounted on the movable vehicle body 1, the screw is screwed on the limiting frame 321 and tightly pushes against the water tank 32, and the limiting frame 321 is fixed on the movable vehicle body 1. The water tank 32 is communicated with the high-pressure spray gun 31 through a pipe 34, and the high-pressure water pump 33 pumps water in the water tank 32 into the high-pressure spray gun 31, so that the water stored in the water tank 32 can be pumped into the high-pressure spray gun 31 through the high-pressure water pump 33 to flush the ditch 4 through the high-pressure spray gun 31. The water tank 32 is provided to facilitate the supply of water to the high pressure lance 31 to avoid the lack of a water source near the raceway 4 to be cleaned. The high-pressure water pump 33 is provided to pressurize the water in the water tank 32 and supply the pressurized water to the high-pressure lance 31, so that the high-pressure lance 31 ejects high-pressure water to wash the raceway 4.

Referring to fig. 1 to 4, before the ditch cleaning vehicle of the present embodiment cleans the ditch 4, the water tank 32 is filled with water, then the movable vehicle body 1 enters the ditch 4, and the scraping device 2 and the flushing device 3 on the movable vehicle body 1 enter the ditch 4 along with the movable vehicle body 1; then, the position of the first telescopic rod 221 on the first fixed sleeve 211 is adjusted according to the width of the canal 4, so that the brush 23 on the outer side of the movable plate 22 is just abutted against the inner side wall of the canal 4; in addition, the position of the high-pressure lance 31 of the flushing device 3 is adjusted. When ditch clearance car clearance ditch 4, remove automobile body 1 and advance in ditch 4, debris such as silt on the 4 inside walls of ditch are clear away along with the advancing of removing automobile body 1 to the brush 23 in the fly leaf 22 outside, and washing device 3's high-pressure spray gun 31 water spray sparge water ditch 4 inside walls simultaneously for 4 clearances of ditch are more thorough.

EXAMPLE III

Referring to fig. 1 to 4, the whole of the canal cleaning vehicle of the present embodiment is the same as that of the second embodiment, and the structure of the mobile vehicle body 1 is improved on the basis of the second embodiment.

Referring to fig. 1, 2 and 4, the moving vehicle body 1 comprises a seat 11, a crawler 12 and a limiting mechanism 13, the crawler 12 is arranged at the bottom of the seat 11, and the moving vehicle body 1 is driven by the crawler 12 to move, so that the canal cleaning vehicle can adapt to the environments of the soft and uneven canals 4 more easily, and the canal cleaning vehicle can move in the canals 4 more easily. Stop gear 13 sets up in the both sides that remove 1 moving direction of automobile body, can restrict the moving direction of ditch cleaning cart, and crooked touching ditch when avoiding ditch cleaning cart to advance in the ditch. The seat 11 is a mounting structure of the scraper device 2 and the flushing device 3, and both the scraper device 2 and the flushing device 3 are provided on the seat 11.

Referring to fig. 1, 2 and 4, the limiting mechanism 13 may have the following structure: the telescopic device comprises a second fixed sleeve 131 and a second telescopic rod 132, wherein the second telescopic rod 132 is telescopically arranged at two ends of the second fixed sleeve 131; the second fixing sleeve 131 is fixed to the seat 11, and the direction of the second fixing sleeve 131 is perpendicular to the moving direction of the moving vehicle body 1. Therefore, the length of the second telescopic rod 132 extending out of the second fixed sleeve 131 can be adjusted according to the width of the ditch 4, and the ditch cleaning vehicle is limited in the ditch 4. The limiting mechanisms 13 are preferably arranged in a group respectively in front of and behind the seat 11, and the two groups of limiting mechanisms 13 limit the ditch cleaning vehicle together, so that the limiting effect is better.

Referring to fig. 1, 2 and 4, the limiting mechanism 13 is further preferably provided with a spring 133 and a limiting wheel 134, one end of the second telescopic rod 132 is elastically disposed in the second fixing sleeve 131 through the spring 133, and the limiting wheel 134 is disposed at one end of the second telescopic rod 132 away from the second fixing sleeve 131. From this, the ditch cleaning cart during operation in ditch 4, can be through the spring action of spring 133 with second telescopic link 132 roof pressure on the 4 inside walls of ditch for the spacing effect of ditch cleaning cart is better in ditch 4, and the operation is more stable. And the limiting wheel 134 on the outer side of the second telescopic rod 132 is in contact with the inner side wall of the ditch 4, so that the second telescopic rod 132 is prevented from scratching and damaging the inner side wall of the ditch 4.

Referring to fig. 1, 2 and 4, an axial through groove 1311 is disposed on the second fixing sleeve 131, a shifting block 1321 is disposed on the second expansion link 132, and the shifting block 1321 penetrates out of the through groove 1311. Therefore, when the ditch cleaning vehicle enters the ditch 4, the shifting block 1321 can be shifted inwards to compress the spring 133, so that the limiting mechanism 13 can be shortened and clamped into the ditch 4.

Referring to fig. 1 to 4, before the ditch cleaning vehicle of the present embodiment cleans the ditch 4, the water tank 32 is filled with water, then the movable vehicle body 1 enters the ditch 4, and the scraping device 2 and the flushing device 3 on the movable vehicle body 1 enter the ditch 4 along with the movable vehicle body 1; then, the position of the first telescopic rod 221 on the first fixed sleeve 211 is adjusted according to the width of the ditch 4, so that the brush 23 on the outer side of the movable plate 22 is just abutted against the inner side wall of the ditch 4; in addition, the position of the high-pressure lance 31 of the flushing device 3 is adjusted. When ditch clearance car clearance ditch 4, remove automobile body 1 and advance in ditch 4, debris such as silt on the 4 inside walls of ditch are clear away along with the advancing of removing automobile body 1 to the brush 23 in the fly leaf 22 outside, and washing device 3's high-pressure spray gun 31 water spray sparge water ditch 4 inside walls simultaneously for 4 clearances of ditch are more thorough. The moving vehicle body 1 is rotationally driven to advance by the crawler 12 while advancing in the raceway 4, and the moving vehicle body 1 is restrained in the advancing direction in the raceway 4 by the restraining mechanism 13.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a ditch cleaning vehicle which characterized in that: the cleaning device comprises a movable vehicle body (1), a scraping device (2) and a flushing device (3), wherein the scraping device (2) and the flushing device (3) are arranged on the movable vehicle body (1), the flushing device (3) flushes water from the movable vehicle body (1) to the outer side of the movable vehicle body (1), and the scraping device (2) is arranged in front of the movable vehicle body (1); the scraping device (2) comprises a fixed plate (21) and a movable plate (22), the fixed plate (21) is fixed in front of the movable vehicle body (1), and the movable plate (22) is arranged on the outer side of the fixed plate (21) in a telescopic adjustment mode.

2. The raceway cleaning vehicle of claim 1, wherein: a first fixed sleeve (211) is arranged on the fixed plate (21), a first telescopic rod (221) is arranged on the movable plate (22), the first fixed sleeve (211) is matched with the first telescopic rod (221), one end of the first telescopic rod (221) is inserted into the first fixed sleeve (211), and the other end of the first telescopic rod (221) is fixed on the movable plate (22); the first fixing sleeve (211) is provided with a first fixing nut (2111), and the first fixing nut (2111) can fix or loosen the first telescopic rod (221).

3. The raceway cleaning vehicle of claim 2, wherein: the scraping device (2) further comprises a brush (23), and the brush (23) is detachably arranged on the outer side of the movable plate (22).

4. The raceway cleaning vehicle of claim 3, wherein: an insertion groove (222) is formed in the outer side of the movable plate (22), and the brush (23) is inserted into the insertion groove (222).

5. The raceway cleaning vehicle of claim 4, wherein: the washing device (3) comprises a high-pressure spray gun (31), and the high-pressure spray gun (31) is detachably arranged on the fixing plate (21).

6. The raceway cleaning vehicle of claim 5, wherein: be provided with on fixed plate (21) solid fixed ring (311), gu be provided with second fixation nut (3111) on fixed ring (311), high-pressure spray gun (31) are pegged graft in solid fixed ring (311), second fixation nut (3111) can be fixed high-pressure spray gun (31) in solid fixed ring (311), or loosen high-pressure spray gun (31) in solid fixed ring (311).

7. The raceway cleaning vehicle of claim 6, wherein: the flushing device (3) further comprises a water tank (32) and a high-pressure water pump (33), the water tank (32) is fixed on the movable vehicle body (1) through a limiting frame (321), the water tank (32) is communicated with the high-pressure spray gun (31) through a pipeline (34), and the high-pressure water pump (33) pumps water in the water tank (32) into the high-pressure spray gun (31).

8. The raceway cleaning vehicle according to any one of claims 1 to 7, characterized in that: the moving vehicle body (1) comprises a seat (11), a crawler belt (12) and a limiting mechanism (13), the crawler belt (12) is arranged at the bottom of the seat (11), and the limiting mechanism (13) is arranged on two sides of the moving vehicle body (1) in the moving direction; the scraping device (2) and the flushing device (3) are both arranged on the vehicle seat (11).

9. The raceway cleaning vehicle of claim 8, wherein: the limiting mechanism (13) comprises a second fixed sleeve (131) and a second telescopic rod (132), and the second telescopic rod (132) is arranged at two ends of the second fixed sleeve (131) in a telescopic mode; the second fixing sleeve (131) is fixed to the seat (11), and the direction of the second fixing sleeve (131) is perpendicular to the moving direction of the moving vehicle body (1).

10. The raceway cleaning vehicle of claim 9, wherein: the limiting mechanism (13) further comprises a spring (133) and a limiting wheel (134), one end of the second telescopic rod (132) is elastically arranged in the second fixing sleeve (131) through the spring (133), and the limiting wheel (134) is arranged at one end, far away from the second fixing sleeve (131), of the second telescopic rod (132); an axial through groove (1311) is formed in the second fixing sleeve (131), a shifting block (1321) is arranged on the second telescopic rod (132), and the shifting block (1321) penetrates out of the through groove (1311).