Clamping tool for telescopic oil cylinder piston of forklift loader

Abstract

A telescopic oil cylinder piston clamping tool of a forklift loader comprises an eccentric sleeve, an eccentric mounting hole for mounting a piston is formed in the eccentric sleeve, a piston eccentric hole is formed in the piston, and the position of the eccentric mounting hole is determined by the piston eccentric hole; and a fixing device convenient for dismounting the piston is arranged on the eccentric sleeve. According to the clamping tool for the telescopic oil cylinder piston of the forklift loader, manual lineation is omitted in piston eccentric hole machining in a mode of designing the special eccentric tool, a four-jaw chuck correction clamping mode of the tool is changed into a three-jaw eccentric special clamp clamping mode, and common turning machining of the eccentric hole is changed into numerical control turning machining. Standard unification is achieved, accumulative errors are reduced, and therefore quality is improved, working efficiency is improved, labor intensity is lowered, and remodeling time and cost are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, in particular to a clamping tooling for the piston of a telescopic oil cylinder of a forklift loader. Background Art

[0002] For the clamping of the piston of a hydraulic cylinder used in construction machinery during processing, at the present stage during the processing, the eccentric hole is first manually marked on a marking platform to determine the center position of the hole, and then clamped and corrected by a four-jaw ordinary lathe. Such a clamping mode has some defects. First, manual marking is required to determine the eccentric position, the reference is not unified, and the cumulative error generated by multi-process processing causes repeated positioning error; second, the correction process after clamping is cumbersome, time-consuming, and the processing efficiency of the ordinary lathe is low; third, after the numerical control lathe finishes processing, the eccentric hole is processed separately by an ordinary lathe, which requires cross-shop cooperation, the labor intensity of the operator is large, the production efficiency is reduced, and there are potential safety hazards and other problems.

[0003] Piston: The piston is the main component of the telescopic oil cylinder. The piston can slide in the oil cylinder by the injection of oil and sealed by a seal, thereby converting hydraulic force into linear or curvilinear motion. When the piston fails, it will cause phenomena such as hydraulic cylinder leakage of the forklift loader, abnormal noise during operation, gradual decrease or even stop of the hydraulic cylinder speed, and hydraulic cylinder crawling.

[0004] Tooling: "Tooling" in the field of mechanical production and processing refers to the process equipment in the production process, which generally refers to various tools used in the manufacturing process, including cutting tools, jigs, grinding tools, inspection tools, auxiliary tools, station tools, etc. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a clamping tooling for the piston of a telescopic oil cylinder of a forklift loader with a simple structure and good effect.

[0006] The utility model is realized by the following technical solutions: A clamping tooling for the piston of a telescopic oil cylinder of a forklift loader includes an eccentric sleeve. An eccentric mounting hole for mounting the piston is provided on the eccentric sleeve. A piston eccentric hole is provided on the piston, and the position of the eccentric mounting hole is determined by the piston eccentric hole; A fixing device for facilitating the disassembly of the piston is provided on the eccentric sleeve.

[0007] Furthermore: The eccentric sleeve is fixed on a numerical control lathe by a three-jaw chuck.

[0008] The fixing device is a screw fixing device, and a plurality of screws Ⅰ for fixing the piston are provided on the side surface of the eccentric sleeve.

[0009] The eccentric sleeve is cylindrical, and the axis of the eccentric sleeve coincides with the axis of the piston eccentric hole.

[0010] A counterweight is provided above the eccentric sleeve.

[0011] The counterweight is fixed on the eccentric sleeve by screw II.

[0012] The present utility model has the following advantages: For the clamping tooling of the piston of the telescopic oil cylinder of a forklift loader in the present utility model, by designing a special eccentric tooling, manual scribing for the machining of the eccentric hole of the piston is cancelled, and the eccentric hole is machined by a numerically controlled lathe instead of a conventional lathe, achieving unified datum and reducing cumulative errors, thereby improving quality, enhancing work efficiency and reducing labor intensity. Description of the Drawings

[0013] The drawings, as a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the drawings described below are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0014] In the drawings:

[0015] Figure 1 is the installation schematic diagram of the eccentric sleeve and the piston of the present utility model;

[0016] Figure 2 is the structural schematic diagram of the eccentric sleeve of the present utility model.

[0017] In the figure: 1. Eccentric sleeve, 2. Screw I, 3. Piston, 4. Screw II, 5. Counterweight.

[0018] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] As Figures 1 to 2 shown, a clamping tooling for the piston of a telescopic cylinder of a forklift loader includes an eccentric sleeve 1. An eccentric mounting hole for mounting a piston 3 is provided on the eccentric sleeve 1. A piston eccentric hole is provided on the piston 3. The position of the eccentric mounting hole is determined by the piston eccentric hole; a fixing device for conveniently disassembling the piston 3 is provided on the eccentric sleeve 1. The eccentric sleeve 1 is cylindrical, and the axis of the eccentric sleeve 1 coincides with the axis of the piston eccentric hole. For the clamping tooling for the piston of the telescopic cylinder of the forklift loader of the present utility model, when processing a piston with an eccentric hole, the piston is fixed by the eccentric sleeve. An eccentric mounting hole is provided on the eccentric sleeve, so that the axis of the piston and the axis of the eccentric sleeve are not on the same line. At the same time, the axis of the eccentric hole on the piston is consistent with the axis of the eccentric sleeve, which is convenient for processing; the piston is installed in the eccentric mounting hole through the fixing device, and the piston is positioned through the eccentric mounting hole and the fixing device, so that the piston can be completely positioned and fastened. At the same time, when the fixing device is used to clamp and loosen the piston, the purpose of quickly replacing the workpiece is achieved; by using the tooling of the present application, manual scribing is not required, the geometric tolerance is effectively improved, and the workpiece does not need to be corrected for eccentricity. The disassembly and assembly are convenient, the labor intensity of the operator is lower, batch production can be realized, and the clamping efficiency is improved.

[0023] As Figures 1 to 2 shown, for a clamping tooling for the piston of a telescopic cylinder of a forklift loader, the eccentric sleeve 1 is fixed on a numerically controlled lathe by a three-jaw chuck. For the clamping tooling for the piston of the telescopic cylinder of the forklift loader of the present utility model, after the workpiece is used to fix the piston, it can be directly clamped by a three-jaw eccentric special fixture, avoiding the use of the four-jaw chuck calibration and clamping method, simplifying the process of clamping the workpiece, improving the clamping efficiency of the product, and ensuring the geometric tolerance and processing efficiency of the product.

[0024] As Figure 1 shown, for a clamping tooling for the piston of a telescopic cylinder of a forklift loader, the fixing device is a screw fixing device, and a plurality of screws Ⅰ2 for fixing the piston 3 are provided on the side surface of the eccentric sleeve 1. For the clamping tooling for the piston of the telescopic cylinder of the forklift loader of the present utility model, when the eccentric sleeve is connected to the piston, the clamping and loosening of the piston are controlled by the screws Ⅰ, which is convenient for replacing the workpiece and realizing batch production.

[0025] As Figure 1A clamping tooling for the piston of the telescopic cylinder of a forklift loader as shown. A counterweight block 5 is provided above the eccentric sleeve 1. The counterweight block 5 is fixed to the eccentric sleeve 1 by screw II 4. Above the eccentric sleeve of the present utility model, a counterweight block is provided at a position complementary to the eccentric mounting hole. The weight of the counterweight block is related to the weight of the piston. After installing the counterweight block, even if the piston is eccentrically installed, the balance of the entire device can be ensured, the center of gravity can be kept on the median line, and the counterweight block can ensure the balance during the rotation of the lathe, which is safe and reliable.

[0026] When the clamping tooling for the piston of the telescopic cylinder of the forklift loader of the present utility model is in use, before loading the piston, first use a three-jaw chuck to clamp the small-end diameter part of the tooling on the machine tool, then fix the counterweight block to the front end of the tooling with screws, then place the piston into the reserved hole of the tooling and push it to the bottom of the reserved hole, and finally use screws to tightly hold the piston in a side-fixing manner to play a role in fixing the workpiece. When replacing the workpiece, only need to loosen the side-fixing screws, no need to calibrate.

[0027] For the clamping tooling for the piston of the telescopic cylinder of the forklift loader in this application, the piston uses eccentric positioning, which can quickly and accurately fix the center position of the workpiece; the front end adopts a counterweight block structure to eliminate the centrifugal force generated by the rotation of the workpiece and ensure the stability and safety of the tooling; the clamping adopts a screw side-fixing type tight-holding structure, which is convenient for workpiece clamping and positioning. This application can improve the operability and work efficiency and save the time cost of tool change.

[0028] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0029] In addition, those skilled in the art can understand that although some embodiments described herein include certain features contained in other embodiments rather than other features, the combination of the features of different embodiments also means being within the protection scope of the present utility model and forms different embodiments. For example, in the above embodiments, those skilled in the art can use them in a combined manner according to the known technical solutions and the technical problems to be solved by this application.

[0030] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications using the technical content prompted above into equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A forklift telescopic cylinder piston clamping tool, characterized in that: The invention comprises an eccentric sleeve (1), wherein the eccentric sleeve (1) is provided with an eccentric mounting hole for mounting a piston (3), the piston (3) is provided with a piston eccentric hole, and the position of the eccentric mounting hole is determined by the piston eccentric hole; and the eccentric sleeve (1) is provided with a fixing device for facilitating the removal of the piston (3).

2. The forklift telescopic cylinder piston clamping tool according to claim 1, characterized in that: The eccentric sleeve (1) is fixed on a CNC lathe by a three-jaw chuck.

3. The forklift telescopic cylinder piston clamping tool according to claim 1, characterized in that: The fixing device is a screw fixing device, and a plurality of screws I (2) for fixing the piston (3) are provided on the side of the eccentric sleeve (1).

4. The forklift telescopic cylinder piston clamping tool according to claim 1, characterized in that: The eccentric sleeve (1) is cylindrical, and the axis of the eccentric sleeve (1) coincides with the axis of the eccentric hole of the piston.

5. The forklift telescopic cylinder piston clamping tool according to claim 1, characterized in that: A counterweight block (5) is provided above the eccentric sleeve (1).

6. The forklift telescopic cylinder piston clamping tool according to claim 5, characterized in that: The counterweight block (5) is fixed to the eccentric sleeve (1) via screws II (4).

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