Press fitting tool for oil seal of rear axle main speed reducer assembly

Abstract

The utility model provides a rear axle main reducer assembly oil seal press-fitting tool, which relates to the field of rear axle main reducer oil seal press-fitting equipment, and comprises a cushion block, a mounting disc and a positioning disc, the center of the bottom of the cushion block is provided with an accommodating hole for accommodating the input end of a rear axle main reducer, and the bottom of the cushion block is welded with the mounting disc; by means of the tool, the oil seal can be rapidly and accurately installed in the oil seal hole of the rear axle main speed reducer shell, then it is ensured that the end face of the oil seal and the end face of the oil seal hole of the rear axle main speed reducer shell are located on the same straight line after the oil seal is installed, and the installation position of the oil seal in the oil seal hole of the rear axle main speed reducer shell does not need to be repeatedly adjusted. And meanwhile, the probability that the lip of the oil seal is damaged when the oil seal is installed is greatly reduced, the subsequent sealing effect of the oil seal is improved, the magnitude of interference is remarkably reduced, and then the press-fitting effect of the oil seal on a rear axle main speed reducer assembly is improved.

Description

Technical Field

[0001] The utility model relates to the field of rear axle main reducer assembly oil seal press-fitting equipment, in particular to a rear axle main reducer assembly oil seal press-fitting tool. Background Art

[0002] With the development of the agricultural vehicle market, customers have increasingly stringent requirements for product seals. Currently, it is necessary to install an oil seal in the oil seal hole of the main reducer housing of the rear axle main reducer assembly to solve the oil leakage during the use of the rear axle main reducer. However, during the installation of the oil seal, it is easy for the end face of the oil seal and the end face of the oil seal hole of the main reducer housing to be not on the same straight line. At this time, the position needs to be adjusted many times, resulting in low installation efficiency and greatly increased probability of inaccurate installation of the oil seal. If the installation is inaccurate, the oil seal lip is easily damaged during the subsequent assembly process, and the subsequent probability of oil seal leakage during use will increase, and the sealing effect of the rear axle main reducer assembly cannot be guaranteed. Utility Model Content

[0003] The purpose of the utility model is to solve the problems raised in the above background technology, and then proposes a rear axle main reducer assembly oil seal pressing tool.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A rear axle main reducer assembly oil seal pressing tool comprises a cushion block, a mounting plate and a positioning plate. A receiving hole for receiving the input end of the rear axle main reducer assembly is provided at the center of the bottom of the cushion block. A mounting plate is provided at the bottom of the cushion block. A docking hole is provided at the center of the mounting plate. The docking hole is cocentric with the receiving hole and a docking tooth matched with the driving gear of the rear axle main reducer assembly is provided in the docking hole. A positioning plate with a diameter larger than the diameter of the oil seal is provided on the outside of the mounting plate. The positioning plate is cocentric with the mounting plate. An oil seal is movably installed at the bottom of the positioning plate and the end face of the oil seal fits with the end face of the positioning plate.

[0006] The tooling can realize the quick and accurate installation of the oil seal in the oil seal hole of the rear axle main reducer housing, thereby ensuring that after the oil seal is installed, its end face is in a straight line with the end face of the oil seal hole of the rear axle main reducer housing, and there is no need to repeatedly adjust the installation position of the oil seal in the oil seal hole of the rear axle main reducer housing, thereby significantly improving the installation efficiency, and at the same time greatly reducing the probability of damaging the oil seal lip when installing the oil seal, improving the subsequent sealing effect of the oil seal, and significantly reducing the interference, thereby improving the press-fitting effect of the oil seal on the rear axle main reducer assembly.

[0007] Furthermore, the cushion block is welded to the mounting plate, and a positioning plate is welded to the outer side of the mounting plate.

[0008] Further, the spacer block, the mounting plate, and the positioning plate are all made of high-strength stainless steel.

[0009] Further, the spacer block and the positioning plate are subjected to quenching and tempering treatment.

[0010] Further, the size of the receiving hole is smaller than that of the docking hole, and the mounting plate is connected to the rear axle main reducer assembly through a plurality of bolts. The bottom end face of the positioning plate is flush with the upper surface of the housing where the oil seal hole is opened on the rear axle main reducer assembly.

[0011] Further, the outer circle and the end face of the spacer block and the mounting plate are all subjected to precision turning, and the end face of the positioning plate is subjected to precision turning.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] Compared with the prior art, through this tooling, the quick and accurate installation of the oil seal into the oil seal hole of the rear axle main reducer housing can be realized. Furthermore, it is ensured that after the oil seal is installed, its end face is in a straight line with the end face of the oil seal hole of the rear axle main reducer housing. There is no need to repeatedly adjust the installation position of the oil seal in the oil seal hole of the rear axle main reducer housing. Therefore, the installation efficiency is significantly improved. At the same time, the probability of damaging the oil seal lip during the installation of the oil seal is greatly reduced. The subsequent sealing effect of the oil seal is improved, and the interference amount is significantly reduced. Furthermore, the pressing effect of the oil seal on the rear axle main reducer assembly is improved. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the cooperation between this tooling and the rear axle main reducer assembly;

[0015] Figure 2 It is a schematic diagram of the structure of this tooling;

[0016] Figure 3 It is a schematic diagram of the mounting plate;

[0017] Reference Signs:

[0018] 1. Rear axle main reducer assembly; 2. Oil seal; 31. Spacer block; 311. Receiving hole; 32. Mounting plate; 321. Docking hole; 322. Docking teeth; 33. Positioning plate. Specific Embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. The present utility model will be further described in conjunction with the drawings and embodiments:

[0020] As shown Figures 1 to 3 in the figure, a tool for pressing and installing an oil seal of a rear axle main reducer assembly includes a cushion block 31, a mounting disc 32, and a positioning disc 33 (in the optimization of the solution, the cushion block 31, the mounting disc 32, and the positioning disc 33 are all made of high-strength stainless steel, and the cushion block 31 and the positioning disc 33 are subjected to quenching and tempering treatment to enable the workpiece to have better comprehensive mechanical properties). A receiving hole 311 for receiving the input end of the rear axle main reducer assembly 1 is provided at the center of the bottom of the cushion block 31. The mounting disc 32 is welded to the bottom of the cushion block 31. A docking hole 321 is provided at the center of the mounting disc 32. The docking hole 321 and the receiving hole 311 are concentric, and a docking tooth 322 with a rectangular main body shape adapted to the driving gear of the rear axle main reducer assembly 1 is provided in the docking hole 321 to achieve precise positioning and guiding. A positioning disc 33 with a diameter larger than the diameter of the oil seal 2 is welded to the outside of the mounting disc 32. The positioning disc 33 and the mounting disc 32 are concentrically arranged. The oil seal 2 is movably installed at the bottom of the positioning disc 33, and the end face of the oil seal 2 is in contact with the end face of the positioning disc 33.

[0021] For further refinement of the solution of the embodiment of the present utility model, as Figure 1 shown in the figure, the size of the receiving hole 311 is smaller than the size of the docking hole 321, and the mounting disc 32 is connected to the rear axle main reducer assembly 1 through a plurality of bolts (a plurality of threaded holes matching the bolts are provided on the mounting disc 32, and the threaded holes are shown but not numbered in the figure). The bottom end face of the positioning disc 33 is flush with the upper surface of the housing of the rear axle main reducer assembly 1 where the oil seal 2 hole is provided.

[0022] The working process of the present utility model:

[0023] First, the cushion block 31, the mounting disc 32, and the positioning disc 33 are welded into an integral tooling. After welding firmly, the rear axle main reducer assembly 1 is clamped with the docking tooth 322 in the docking hole 321 of the mounting disc 32 as a reference. Before installation, the outer circles and end faces of the cushion block 31 and the mounting disc 32 are machined by precision turning to standard values in sequence. Among them, the outer diameter range of the mounting disc 32 is 40 - 45 MM, preferably 40 MM, the outer diameter range of the cushion block 31 is 32 - 35 MM, preferably 35 MM, and the diameter range of the positioning disc 33 is 75 - 80 MM, preferably 76 MM. During the precision turning process, a dial indicator is used for calibration to make the values accurate. After processing, the perpendicularity between the rectangular docking tooth 322 in the docking hole 321 of the mounting disc 32 and the two end faces of the mounting disc 32 is less than 0.015; in addition, before installing the oil seal 2, the positioning disc 33 is machined by precision turning in advance so that the bottom end face of the positioning disc 33 is in contact with the end face of the oil seal 2 to achieve positioning. In this way, it can be ensured that the end face of the oil seal 2 and the end face of the oil seal hole of the rear axle main reducer housing are on the same straight line, and it can be completed with one clamping and precision turning, without repeated clamping;

[0024] When it is necessary to install the oil seal 2 in the oil seal hole of the rear axle main reducer housing, firstly connect the docking teeth 322 in the docking hole 321 of the installation plate 32 with the rectangular teeth on the driving gear of the rear axle main reducer assembly 1. At this time, it can be ensured that after the oil seal 2 is installed, its horizontal and vertical positions in the oil seal hole of the rear axle main reducer housing are correct and will not be offset. Then the oil seal 2 will accurately enter the oil seal hole of the rear axle main reducer housing. The tooling positioning plate 33 is finely turned with a diameter of 76MM on the end face to ensure that the oil seal 2 is installed in place. The outer circle of the installation plate 32 is finely turned to 40MM with a diameter of 42MM. The interference of the oil seal 2 is reduced from 2.6 to 0.6 to prevent the oil seal lip from being damaged when installing the oil seal 2. The three-guarantee rate of the oil seal is reduced from 3.6% to 0.14%. This installation method can greatly improve the sealing effect of the subsequent oil seal 2 on the rear axle main reducer 1 assembly.

[0025] Compared with the prior art, the present tooling can realize quick and accurate installation of the oil seal 2 in the oil seal hole of the rear axle main reducer housing, thereby ensuring that after the oil seal 2 is installed, its end face is in a straight line with the end face of the oil seal hole of the rear axle main reducer housing, and there is no need to repeatedly adjust the installation position of the oil seal 2 in the oil seal hole of the rear axle main reducer housing, thereby significantly improving the installation efficiency, and at the same time greatly reducing the probability of damaging the oil seal lip when installing the oil seal 2, improving the subsequent sealing effect of the oil seal 2, and significantly reducing the interference, thereby improving the press-fitting effect of the oil seal 2 on the rear axle main reducer 1 assembly.

[0026] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A rear axle main reducer assembly oil seal press tool, characterized in that: The invention comprises a cushion block (31), a mounting plate (32) and a positioning plate (33); a receiving hole (311) for receiving the input end of a rear axle main reducer assembly (1) is provided at the center of the bottom of the cushion block (31); a mounting plate (32) is provided at the bottom of the cushion block (31); a docking hole (321) is provided at the center of the mounting plate (32); the docking hole (321) is cocentric with the receiving hole (311); a docking tooth (322) adapted to the driving gear of the rear axle main reducer assembly (1) is provided in the docking hole (321); a positioning plate (33) having a diameter greater than that of an oil seal (2) is provided on the outside of the mounting plate (32); the positioning plate (33) is cocentric with the mounting plate (32); an oil seal (2) is movably installed at the bottom of the positioning plate (33); and an end surface of the oil seal (2) is in contact with an end surface of the positioning plate (33).

2. The rear axle main reducer assembly oil seal press tool according to claim 1, characterized in that: The cushion block (31) is welded to the mounting plate (32), and a positioning plate (33) is welded to the outside of the mounting plate (32).

3. The rear axle main reducer assembly oil seal press tool according to claim 1, characterized in that: The cushion block (31), the mounting plate (32) and the positioning plate (33) are all made of high-strength stainless steel.

4. The rear axle main reducer assembly oil seal press tool according to claim 3, characterized in that: The cushion block (31) and the positioning plate (33) are subjected to a heat treatment.

5. The rear axle main reducer assembly oil seal press tool according to claim 1, characterized in that: The size of the accommodating hole (311) is smaller than the size of the docking hole (321), and the mounting plate (32) is connected to the rear axle main reducer assembly (1) via bolts, and the bottom end surface of the positioning plate (33) is flush with the upper surface of the housing of the rear axle main reducer assembly (1) on which the oil seal hole is provided.

6. The rear axle main reducer assembly oil seal press tool according to claim 1, characterized in that: The outer circumference and end surface of the cushion block (31) and the mounting plate (32) are both processed by precision turning, and the end surface of the positioning plate (33) is processed by precision turning.

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