CN219413098U - Novel quick-change oil cylinder of excavator - Google Patents

Abstract

The utility model provides a novel quick-change oil cylinder of an excavator, wherein a piston rod is arranged in the middle of the novel quick-change oil cylinder, pistons are arranged at two ends of the piston rod, cylinder barrels are arranged at two symmetrical sides of the piston rod through guide sleeves, an oil inlet and an oil outlet are arranged in the middle of the piston rod in the vertical direction, and oil paths leading to the two sides are reserved in the piston rod. When the hydraulic cylinder is installed and used, the middle position of the piston rod of the oil cylinder is fixed, and the hydraulic system controls the cylinder barrel to extend outwards and retract inwards through an internal oil way, so that the hydraulic system is connected with a working device. This quick change cylinder simple structure, the flexible cylinder during operation in both sides is used as the round pin axle and is inserted tool equipment ear seat pinhole, accomplishes the connection, need not to install outer connecting pin axle, and screw hole installation limiting plate is left in the cylinder outside, and after the cylinder stretched out to the position of use, through installing the limiting plate, avoided the hydraulic failure cylinder to shrink inwards, more stable, reliable, safe, convenient during the use.

Description

Novel quick-change oil cylinder of excavator

Technical Field

The utility model relates to the field of hydraulic cylinders, in particular to a novel quick-change cylinder of an excavator.

Background

With the increasing development of excavating machinery, the excavator expands more than 10 functions of an earth auger, a vibrating rammer, crocodile pliers, a grapple, soil loosening, rolling, tunneling, rock opening and the like from the traditional excavating, crushing and backfilling functions, and the use value of the excavator is greatly improved. The traditional working devices such as the excavator bucket are directly connected with the connecting rod and the bucket rod to carry out single operation. In order to meet the operation requirement, the working device needs to be replaced frequently in construction, and on the premise of ensuring safety and reliability, the replacement of the working device can be realized easily and accurately, so that the time and resources are saved, and the equipment utilization rate and the operation efficiency are improved. The quick-change device becomes a key component for the multifunction of the excavator, wherein the structural form and the mounting mode of the quick-change oil cylinder influence the overall stability, reliability, convenience and service life.

The prior art conventional construction quick change cylinder is typically a fixed cylinder barrel with a piston rod reciprocally extendable and retractable along its axis. In the use process, the pin shaft is required to be arranged on the exposed piston rod of the oil cylinder to be connected with other parts, and the hydraulic system is used for replacing the quick-change working device by controlling the expansion and contraction of the piston rod. When the working device is replaced, the quick-change frame is centered with the working device, and the quick-change oil cylinder is started to push the pin shafts at the two ends of the quick-change frame to pass through the pin shaft holes of the quick-change lug seat to finish quick-change. The conventional structure quick-change oil cylinder is complex, an external connecting pin shaft is needed, and after the pin shafts are connected, the outer circles of the pin shafts at the two ends are required to be coaxial, so that the processing precision and the assembly requirements on the oil cylinder and the pin shafts are higher; the pin shaft is installed and connected on the piston rod, so that the connecting piece is easy to damage and inconvenient to replace after long-time work, and the pin shaft has the risk of falling off due to failure of the mounting piece under severe working conditions, so that the requirements on the material strength and reliability of the mounting piece are more severe.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a novel quick-change oil cylinder of an excavator.

In order to solve the problems in the prior art, the utility model discloses a novel quick-change oil cylinder of an excavator, which comprises the following components: the piston rod is provided with an oil inlet A and an oil inlet B in the middle part, rod parts of the piston rod are arranged on two sides of the middle part, two pistons are respectively arranged at two ends of the piston rod, and each piston is sleeved into one cylinder; the oil inlet A and the oil inlet B are used for connecting a hydraulic system, oil ways which are respectively communicated with the oil inlet A and the oil inlet B are arranged in the piston rod, and when hydraulic oil is injected from the oil inlet A, the cylinder barrel extends out to two sides of the piston rod; when hydraulic oil is injected from the oil inlet B, the cylinder barrel contracts towards the middle of the piston rod.

Further, a guide sleeve is arranged at the cylinder opening of the cylinder barrel, and the piston rod enters the cylinder barrel through the guide sleeve.

Further, the guide sleeve is fixed at the cylinder opening of the cylinder barrel through a screw.

Further, one end of the cylinder barrel far away from the cylinder opening is provided with a limiting plate.

Further, the limiting plate is fixed to the end portion of the cylinder barrel through a set screw.

Further, a threaded hole and/or a V-shaped groove for connecting the excavator are formed in the middle of the piston rod.

The utility model has the beneficial effects that:

(1) The cylinder barrels on two sides of the oil cylinder can be used as pin shafts without external connection pin shafts, so that the structure is simple and the use is convenient;

(2) The cylinder barrels on the two sides of the oil cylinder are good in coaxiality, adjustment is not needed when the working device is replaced, and efficiency is high;

(3) And limiting plates are arranged at two ends of the cylinder barrel during working, so that the hydraulic failure cylinder barrel is prevented from shrinking inwards, and the hydraulic failure cylinder barrel is safe and reliable.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of the structure of the present utility model;

fig. 3 is a schematic view of the fixed connection of the piston rod in the structure of the present utility model.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

1-2, the novel quick-change oil cylinder for the excavator comprises a piston rod 5, a cylinder barrel 2 and a limiting plate 7. The conventional construction quick change cylinder is typically a fixed cylinder barrel with a piston rod reciprocally extendable and retractable along its axis. In the use process, the pin shaft is required to be arranged on the exposed piston rod of the oil cylinder to be connected with other parts, and the hydraulic system is used for replacing the quick-change working device by controlling the expansion and contraction of the piston rod. When the working device is replaced, the quick-change frame is centered with the working device, and the quick-change oil cylinder is started to push the pin shafts at the two ends of the quick-change frame to pass through the pin shaft holes of the quick-change lug seat to finish quick-change. The conventional structure quick-change oil cylinder is complex, an external connecting pin shaft is needed, and after the pin shafts are connected, the outer circles of the pin shafts at the two ends are required to be coaxial, so that the processing precision and the assembly requirements on the oil cylinder and the pin shafts are higher; the pin shaft is arranged and connected on the piston rod, so that the connecting piece is easy to damage and inconvenient to replace after long-time work, and the pin shaft has the risk of falling off due to failure of the mounting piece under severe working conditions, so that the requirements on the material strength and the reliability of the mounting piece are more severe; the novel quick-change oil cylinder structure is characterized in that a piston rod 5 is arranged in the middle of the novel quick-change oil cylinder structure, pistons 1 are arranged at two ends of the piston rod 5, cylinder barrels 2 are arranged at two symmetrical sides through guide sleeves 3, an oil inlet A, an oil inlet B and an oil outlet are formed in the upper and lower directions of the middle of the piston rod 5, and oil paths leading to the two sides are reserved in the middle. When the hydraulic cylinder is installed and used, the middle position of the cylinder piston rod 5 is fixed, and the hydraulic system controls the cylinder barrel to extend outwards and retract inwards through an internal oil way, so that the hydraulic system is connected with a working device. This quick change cylinder simple structure, the flexible cylinder during operation in both sides is used as the round pin axle and is inserted tool equipment ear seat pinhole, accomplishes the connection, need not to install outer connecting pin axle, and screw hole installation limiting plate is left in the cylinder outside, and after the cylinder stretched out to the position of use, through installing the limiting plate, avoided the hydraulic failure cylinder to shrink inwards, more stable, reliable, safe, convenient during the use.

When the oil cylinder works, as the piston rod 5 is fixed, the hydraulic system is controlled, hydraulic oil is injected from the oil inlet B, the cylinders 2 at the two sides shrink towards the middle, at the moment, the cylinders 2 are in the shortest position, the ear seat pin holes of the working device are aligned with the outer circles of the cylinders 2, the hydraulic system is controlled, hydraulic oil is injected from the oil inlet A, the cylinders 2 extend towards the two sides and serve as pin shafts to be inserted into the ear seat pin holes of the working device, the cylinders 2 at the two ends extend to the appointed position according to the ear seat width of the tool device, and finally the limiting plate 7 is installed through the set screw 6, so that mechanical limiting is completed.

As shown in fig. 3, a connecting threaded hole and a V-shaped groove are formed in the middle of the piston rod 5 for connecting with the structural member of the excavator.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also in the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. And in the drawings of the present utility model, the filling patterns are only for distinguishing the layers, and are not limited in any way.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a novel quick change hydro-cylinder of excavator which characterized in that includes: the piston comprises a piston rod (5), a cylinder barrel (2) and pistons (1), wherein an oil inlet A, an oil inlet B and an oil outlet are formed in the middle of the piston rod (5), rod parts of the piston rod (5) are arranged on two sides of the middle, one piston (1) is respectively arranged at two ends of the piston rod (5), and each piston (1) is sleeved into one cylinder barrel (2); the oil inlet A and the oil inlet B are used for connecting a hydraulic system, oil ways which are respectively communicated with the oil inlet A and the oil inlet B are arranged in the piston rod (5), and when hydraulic oil is injected from the oil inlet A, the cylinder barrel (2) extends out to two sides of the piston rod (5); when hydraulic oil is injected from the oil inlet B, the cylinder barrel (2) contracts towards the middle part of the piston rod (5).

2. The novel quick-change oil cylinder of the excavator according to claim 1, wherein a guide sleeve (3) is arranged at a cylinder opening of the cylinder barrel (2), and the piston rod (5) enters the cylinder barrel (2) through the guide sleeve (3).

3. The novel quick-change oil cylinder of the excavator according to claim 2, wherein the guide sleeve (3) is fixed at the opening of the cylinder barrel (2) through a screw.

4. The novel quick-change oil cylinder of the excavator according to claim 1, wherein a limiting plate (7) is arranged at one end, far away from the cylinder opening, of the cylinder barrel (2).

5. The novel quick-change oil cylinder for the excavator according to claim 4, wherein the limiting plate (7) is fixed to the end portion of the cylinder tube (2) through a set screw (6).

6. The novel quick-change oil cylinder for the excavator according to claim 1, wherein the middle part of the piston rod (5) is further provided with a threaded hole and/or a V-shaped groove for connecting the excavator.