CN2685020Y

CN2685020Y - Electric hammer

Info

Publication number: CN2685020Y
Application number: CN 200420020642
Authority: CN
Inventors: 吴成烨; 杨国忠; 陈晓敏; 王颖峰; 王科威
Original assignee: 王晓冬
Priority date: 2004-03-05
Filing date: 2004-03-05
Publication date: 2005-03-16
Anticipated expiration: 2014-03-05

Abstract

The utility model relates to an electric hammer, belonging to the technical field of the electric tool. The utility model comprises a rotating and a knocking gear, which is arranged in the cavity which is composed of a reduction gearbox and a middle cover; a rotating shaft is provided with two toothed gears whose axial direction is apart at a distance; a clutch of a rotating sleeve is provided with two corresponding toothed gears meshed with the both parts; the toothed gear rim on the left of the clutch is arranged in a groove of a movable rail arranged above the clutch. The movable rail is connected with an upper knob (19). Compared with the prior art, the utility model has the advantages of reasonable design, compact structure, easy operation, wide adaptability, etc.

Description

Novel electric hammer

Technical field

The utility model relates to a kind of electric hammer, belongs to the technical field of electric tool.

Technical background

When on building, beating fixing hole, generally all adopt electric hammer, by the alloy bit repeated stock, on building, get fixing hole.Someone has proposed a kind of dustless percussion drill (electric hammer) (patent No.: patent application 97115804.5), it is made up of percussion drill, dust gathering arrester, reducing cap, attachment cap, sweep-up pipe, suction box and dust-collecting box, its characteristics are: the front end of drill bit cooperates socket with reducing cap and dust gathering arrester, socket attachment cap and sweep-up pipe on the inclined-plane of dust gathering arrester, sweep-up pipe leads to suction box through interface, rotating shaft is the rotating shaft lengthening in the percussion drill, centrifugal impeller is housed, suction box leads to dust-collecting box through elbow, filter course is arranged in the dust-collecting box, venthole is arranged on every side.It is big that above-mentioned patent application exists volume, problems such as operation inconvenience.

Therefore, someone has proposed a kind of pistol type electric hammer (patent No.: patent application 96233491.X), it contains rotation and hammer mechanism, rotation and hammer mechanism all are contained in the cavity of reduction box and middle cover composition, reduction box and middle cover be connected the location be reduction box itself plastic pin with in the hole that covers cooperate, the middle cover front end has only a bearing position.But problems such as the torque transmission shaft of above-mentioned patent is regulated inconvenience, and adaptive surface is less.

Summary of the invention

It is big that the utility model has solved the volume that prior art exists, and problem such as operate constantly or the adjusting inconvenience of power transmission shaft torque or adaptive surface be less, provides a kind of reasonable in design, and compact conformation is easy to operate, adapts to wide novel electric hammer.

Above-mentioned technical purpose of the present utility model mainly solves by the following technical programs: rotation and hammer mechanism all are located in the cavity of being made up of reduction box and middle cover, the middle cover front end has only a bearing position, rotating mechanism is the bearing supporting by the jackshaft two ends, the one end tooth wheel and the rotor gears engaged of jackshaft, pivoted housing is by the bearing supporting of rear and front end, the pivoted housing front end is provided with elastic spring and protecgulum, protecgulum inwall and pivoted housing periphery tight fit, it is characterized in that jackshaft is provided with waves bearing, the described bearing inner race that waves bearing cooperates with jackshaft, the plane and the jackshaft at its retainer place have a certain degree, and the described fork that waves on the bearing outer ring is hinged with the articulated pin of being located at the pressure gas cylinder right-hand member; The jackshaft left end is the spline tooth axle, which is provided with is 2 gears, both are setting separated by a distance on jackshaft, described spacing is more than or equal to the thickness of the right gear, and the reference diameter of the right gear is greater than left side gear compound graduation diameter of a circle, clutch on the pivoted housing be provided with two accordingly can with both meshed gears, the tooth wheel rim on the left side places in the side's provided thereon groove of moving rail on the clutch, described moving rail is associated with upper knob.Wherein, power transmission shaft can be gear shaft, also can be that axle cooperates by key with gear; The gear that two reference diameters do not wait is set on power transmission shaft, two respective gears that can be engaged with are set on clutch accordingly, thereby can stir moving rail to reach the purpose of regulating the suffered moment of torsion of rotation with the power transmission shaft meshed gears on the switch clutch by upper knob, can adapt to the operation of differing texture material, strengthen the novel adaptive surface of this use; Thereby with the spline fitted of the spline stirring the shift fork motion and reach the control power transmission shaft and jackshaft whether the operation by lower knob, whether can control turning cylinder rotates, be pivoted housing rotation whether, make the different conditions that the novel rotary head of this use is in respectively to be changeed or do not change.

As preferably, the thickness of two gear left side gears of the clutch on the described pivoted housing is less than the thickness of the right gear.Wherein, the gear that the less gear of reference diameter and reference diameter are bigger on the clutch can guarantee that rotary head obtains different moments of torsion under different operating conditions.

As preferably, be provided with declutch shift shaft below the described jackshaft, declutch shift shaft is provided with the shift fork spring, and shift fork spring the right is provided with shift fork, and the end of shift fork places in the shift fork cover, and shift fork is related with the sidespin button of being located at the reduction box lower wall.

Therefore, the utlity model has reasonable in design, compact conformation, easy to operate, adapt to characteristics such as wide.Wherein, power transmission shaft can be gear shaft, also can be that axle cooperates by key with gear; The gear that two reference diameters do not wait is set on power transmission shaft, two respective gears that can be engaged with are set on clutch accordingly, thereby can stir moving rail to reach the purpose of regulating the suffered moment of torsion of rotation with the power transmission shaft meshed gears on the switch clutch by upper knob, can adapt to the operation of differing texture material, strengthen the novel adaptive surface of this use; Thereby with the spline fitted of the spline stirring the shift fork motion and reach the control power transmission shaft and jackshaft whether the operation by lower knob, whether can control turning cylinder rotates, be pivoted housing rotation whether, make the different conditions that the novel rotary head of this use is in respectively to be changeed or do not change.Wherein, the gear that the less gear of reference diameter and reference diameter are bigger on the clutch can guarantee that rotary head obtains different moments of torsion under different operating conditions.

Description of drawings

Accompanying drawing 1 is the generalized section of the cavity of middle cover of the present utility model and reduction box composition.

Specific embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment 1: as shown in Figure 1, fixing between reduction box 39 and middle cover by cross slotted head tapping screw 27, and valve rubber 30 is set between the two, seal by oil sealing 21 between reduction box and middle cover, be provided with jackshaft in the cavity of forming by reduction box 39 and middle cover 28, the left end of jackshaft is a spline gear, jackshaft drives by gear and the motor gear engagement of being located at its right-hand member, jackshaft is by bearing 38 supportings at its two ends, jackshaft and splined shaft pass through spline fitted, be set with on the jackshaft and wave bearing, the fork that waves bearing is hinged with the articulated pin of being located at pressure gas cylinder 25 right-hand members, be provided with impact piston 11 in the cylinder, the right-hand member of impact piston 11 is provided with impact piston O shape circle 12, the left end of impact piston is provided with impact bar, the periphery of pressure gas cylinder 25 is provided with pivoted housing 09, pivoted housing 09 drives by clutch 10, be connected by flat key 13 between clutch and the pivoted housing, clutch 10 is provided with two adjacent gears, the thickness of the right gear less than its reference diameter of thickness of the right gear then greater than the reference diameter of the right gear, the top of gear places in the groove of moving rail 23, moving rail 23 is associated with upper knob 19, be provided with upper knob O shape ring 20 between upper knob 19 and reduction box housing, upper knob and moving rail are asked and are provided with rotating disk 18, rotating disk 18 is by cross slotted head tapping screw 15, spring washer 16 and plain washer 17 are fixed in the upper knob inner face, 18 of reduction box inwall and upper knob inwall and rotating disks are provided with orbit determination 14, the upper knob inner face is provided with groove, be provided with little spring and positioning bead in it, the other end of little spring withstands orbit determination 14, separated by a distancely on the splined shaft of clutch below be provided with corresponding two gears, on the splined shaft gear thickness on the left side greater than the thickness of the right gear its reference diameter less than the reference diameter of the right gear, both axial spacings are greater than the thickness of the right gear on the clutch, wave and be provided with the shift fork cover between bearing and splined shaft, its below is provided with declutch shift shaft 29, declutch shift shaft 29 two ends place in the groove of middle cover 28 respectively and in the through hole of month shape tooth 36, month shape tooth 36 is fixed on the housing of reduction box 39 by cross recessed pan head tapping screw 37, declutch shift shaft 29 is provided with shift fork spring 35, shift fork spring the right is provided with shift fork 31, the end of shift fork 31 places in the shift fork cover, shift fork is related with the sidespin button 32 of being located at the reduction box lower wall, be provided with little spring 33 and positioning bead 34 between sidespin button 32 and the reduction box, pivoted housing 09 is provided with annular groove with the abutting end of middle cover, be provided with washer 24 in the annular groove, outside framework oil seal 40 and back skeleton oil sealing 08 before end is provided with about the rolling bearing 07 of supporting pivoted housing 09, the left end of preceding outside framework oil seal is provided with helical spring 05, be provided with pad 06 between the two, helical spring left end is provided with control steel ring 04, the adjacent left side of control steel ring is provided with control cover 41, the pivoted housing front end is provided with protecgulum 01, and protecgulum 01 and 41 in control cover are provided with axle-steel silk back-up ring 02.

During use, thereby can stir moving rail to reach the purpose of regulating the suffered moment of torsion of rotation with the power transmission shaft meshed gears on the switch clutch, can adapt to the operation of differing texture material, strengthen the novel adaptive surface of this use by upper knob; Thereby with the spline fitted of the spline stirring the shift fork motion and reach the control power transmission shaft and jackshaft whether the operation by lower knob, whether can control turning cylinder rotates, be pivoted housing rotation whether, make the different conditions that the novel rotary head of this use is in respectively to be changeed or do not change.

Claims

1, a kind of novel electric hammer, rotation and hammer mechanism all are located in the cavity of being made up of reduction box (39) and middle cover (28), middle cover (28) front end has only a bearing position, rotating mechanism is to support by the bearing at jackshaft two ends (38), the one end tooth wheel and the rotor gears engaged of jackshaft, pivoted housing is by bearing (07) supporting of rear and front end, the pivoted housing front end is provided with elastic spring (02) and protecgulum (01), protecgulum (01) inwall and pivoted housing periphery tight fit, it is characterized in that jackshaft is provided with waves bearing, the described bearing inner race that waves bearing cooperates with jackshaft, the plane and the jackshaft at its retainer place have a certain degree, and the described fork that waves on the bearing outer ring is hinged with the articulated pin of being located at pressure gas cylinder (25) right-hand member; The jackshaft left end is the spline tooth axle, which is provided with is 2 gears, both are setting separated by a distance on jackshaft, described spacing is more than or equal to the thickness of the right gear, and the reference diameter of the right gear is greater than left side gear compound graduation diameter of a circle, clutch (10) on the pivoted housing (09) be provided with two accordingly can with both meshed gears, the tooth wheel rim on the left side places in the side's provided thereon groove of moving rail (23) on the clutch, described moving rail (23) is associated with upper knob (19).

2, novel electric hammer according to claim 1, the thickness of two gear left side gears that it is characterized in that the clutch on the described pivoted housing (09) is less than the thickness of the right gear.

3, new set hammer watering model according to claim 1 and 2, it is characterized in that described jackshaft below is provided with declutch shift shaft (29), declutch shift shaft (29) is provided with shift fork spring (35), shift fork spring the right is provided with shift fork (31), the end of shift fork (31) places in the shift fork cover, and shift fork is related with the sidespin button of being located at the reduction box lower wall.