Press fitting tool for return spring of clutch of backhoe loader

Abstract

The utility model discloses a press fitting tool for a return spring of a clutch of a loader-digger. The press fitting tool comprises a double-end stud, a step nut, an open washer, a pressing plate seaming, a nut and a base plate. The lower ends of the double-end studs are respectively screwed into threaded holes formed in the left end and the right end of the base plate and are fixed by nuts; hole sites are arranged at the left end and the right end of the pressing plate welding part and used for sleeving studs during operation, and a cavity is formed in the middle area of the pressing plate welding part and used for sleeving a clutch during operation. The step nut and the open washer are used for assembling and disassembling the pressing plate welding part during operation. The clutch return spring assembly tool is simple and compact in structure, convenient and efficient to use and reliable in assembly quality, and solves the problems that a clutch return spring of a loader-digger in the prior art is tedious to assemble, the number of assembly tools is large, and a check ring is prone to being damaged in the assembly process.

Description

TECHNICAL FIELD

[0001] The utility model relates to excavator clutch assembly auxiliary device technical field, concretely relates to the press -fitting frock used when excavator clutch return spring assembly. BACKGROUND

[0002] Excavator clutch shaft is important component part in excavator transmission system, and its working principle is that when needing to hang a certain gear, each clutch assembly is controlled by a control valve to form a speed ratio, and the inner friction plate and the outer friction plate of the corresponding gear clutch are pushed by the working oil pressure to press the piston, and the inner friction plate and the outer friction plate of the clutch are loosened, and the piston is returned by the action of return spring. Among them, the assembly of return spring is more complicated, the return spring needs to be in the state of compression, and then the retaining ring is assembled into the limiting groove to limit it. The assembly method commonly used in the prior art is to knock the retaining ring into the limiting groove by using a knocking tool, and the defect is that the retaining ring is easy to deform and damage during knocking, and the transmission box of the excavator needs seven clutches for gear shifting to meet the transmission requirements of different working conditions, and each clutch is different in shape and size, so there are problems of complicated assembly of the clutch, large number of assembly tools and easy damage of the retaining ring during the assembly process. SUMMARY

[0003] The utility model discloses a kind of excavator clutch return spring press -fitting frock of simple structure compact, convenient and efficient, assembly quality reliable, overcome above-mentioned problem, solve the problem of complicated assembly of excavator clutch return spring of prior art, large number of assembly tools, easy damage of retaining ring during the assembly process.

[0004] To achieve the above purpose, the utility model excavator clutch return spring press -fitting frock includes stud 1, stepped nut 2, split washer 3, plate welding 4, nut 5 and pad 6;Stud 1 is provided with one root each left and right, and the lower end is screwed into the threaded hole provided at the left and right ends of pad 6 and is fixed with nut 5;Plate welding 4 is provided with hole position at left and right ends for being sleeved into stud 1 during operation, and the middle region of the plate welding 4 is provided with cavity for being sleeved into clutch 7 during operation;Stepped nut 2, split washer 3 are used for the dismounting of plate welding 4 during operation.

[0005] The utility model excavator clutch return spring press -fitting frock has the following technical features and beneficial effects:

[0006] 1, plate welding 4 can adapt the assembly size of seven clutches, greatly reduce the number of assembly tools, solve the problem of large number of transmission box clutch assembly tools in prior art and increase the production cost;

[0007] 2. The spring seats of the four pairs of return springs are welded together by pressure plate, so that the force is evenly distributed. This avoids the situation in the existing technology where the return spring is assembled by hammering, which directly applies force to the retaining ring and easily causes deformation and damage to the return spring and retaining ring.

[0008] 3. It has a simple and compact structure, is easy and efficient to use, and has reliable assembly quality. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the main cross-sectional structure of the excavator loader clutch return spring press-fit tool.

[0010] Figure 2 This is a top view schematic diagram of the clutch return spring press-fit fixture for excavators and loaders according to this utility model.

[0011] Attached reference numerals: 1. Double-ended stud; 2. Stepped nut; 3. Open washer; 4. Pressure plate weld; 5. Nut; 6. Washer; 7. Clutch. Detailed Implementation

[0012] The specific implementation method of the excavator loader clutch return spring press-fit tool of this utility model will be further described in detail below with reference to the accompanying drawings.

[0013] Appendix Figure 1 , Figure 2 As shown, the present invention relates to a clutch return spring press-fit fixture for an excavator loader, comprising a double-ended stud 1, a stepped nut 2, an open washer 3, a pressure plate weld 4, a nut 5, and a washer 6. One double-ended stud 1 is provided on each side, with its lower end screwed into threaded holes at both ends of the washer 6 and secured with the nut 5. The pressure plate weld 4 has holes at both ends for inserting the double-ended stud 1 during operation, and a cavity in the middle area for inserting the clutch 7 during operation. The stepped nut 2 and the open washer 3 are used for loading and unloading the pressure plate weld 4 during operation.

[0014] During assembly, place the clutch 7 above the center of the pad 6. Then, align the two double-ended studs 1 with the left and right holes of the pressure plate weld 4. Press the pressure plate weld 4 onto the spring seat of the return spring of the clutch 7 and fix it with two open washers 3 and stepped nuts 2 in sequence. Use a wrench, socket, or pneumatic wrench to tighten the stepped nuts 2 at both ends evenly downwards until the return spring is compressed and lower than the height of the limit groove. Then, install the retaining ring into the limit groove. After assembly, use a wrench, socket, or pneumatic wrench to loosen the stepped nuts 2 at both ends evenly upwards.

Claims

1. A press fitting tool for excavator loader clutch return spring, characterized in that: It includes stud (1), stepped nut (2), split washer (3), welding plate (4), nut (5) and pad (6); the stud (1) is provided with one root on the left and right, and the lower end is screwed into the threaded hole provided in the left and right ends of the pad (6) and is fixed with the nut (5); the left and right ends of the welding plate (4) are provided with hole positions for sleeving the stud (1) during operation, and the middle area of the welding plate (4) is provided with a cavity for sleeving the clutch (7) during operation; the stepped nut (2) and split washer (3) are used for the dismounting of the welding plate (4) during operation.

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