Press fitting tool for oil seal of main speed reducer of automobile

Abstract

An automobile main reducer oil seal press fitting tool comprises a linear press press head, an oil seal press fitting tool body is arranged below the linear press press head, the center of the oil seal press fitting tool body and the center of the linear press press head are located on the same axis, the oil seal press fitting tool body comprises a press fitting base, and a receding hole is formed in the middle of the press fitting base. The center of the receding hole and the center of the main speed reducer gear assembly are located on the same axis, the left side end face of the press-fitting base is a main speed reducer shell limiting face, a press-fitting pressing head is arranged above the press-fitting base, the outer circumference of the press-fitting pressing head is sleeved with a press-fitting guide seat, and a limiting block is arranged at the top end of the press-fitting pressing head. The limiting block axially limits the press-fitting guide seat, the axial length of the press-fitting guide seat is smaller than that of the press-fitting pressing head, and an oil seal protection sleeve is arranged on the inner side of the press-fitting pressing head and installed on the outer side of a spline of a main speed reducer gear assembly. And the centers of the press-fitting pressure head, the press-fitting guide seat, the limiting block, the oil seal protection sleeve and the receding hole are positioned on the same axis.

Description

Technical Field

[0001] This utility model relates to the field of automotive chassis parts assembly technology, specifically to a tooling for pressing oil seals on automotive main reducers. Background Technology

[0002] Press-fitting the oil seals of automotive main reducers is a crucial step in the production process. Currently, the existing oil seal press-fitting fixtures lack axial height limits and centering devices, leading to improper seal orientation during insertion. This can cause the oil seals to be misaligned, resulting in incomplete press-fitting, air leakage before and oil leakage after the main reducer is sold, increasing production and maintenance costs. Furthermore, the lack of oil seal protection devices in existing fixtures makes the oil seals susceptible to damage from burrs and flash on the main reducer's drive gear during insertion, compromising the cleanliness of the seal lip and ultimately causing air and oil leaks in the main reducer.

[0003] Therefore, a press-fitting tool is needed to ensure that the oil seal does not become misaligned and is not easily damaged. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a pressing fixture for automotive main reducer oil seals. This pressing fixture can automatically guide and center the pressing of the main reducer oil seal, ensuring that it is pressed into place in one go, and guaranteeing the oil seal height and height difference.

[0005] The purpose of this utility model is achieved by the following solution: a pressing fixture for an automotive main reducer oil seal, including a wire press head, with an oil seal pressing fixture disposed below the wire press head. The center of the oil seal pressing fixture and the center of the wire press head are located on the same axis. The oil seal pressing fixture includes a pressing base, with a clearance hole in the middle of the pressing base. The center of the clearance hole and the center of the main reducer gear assembly are located on the same axis. The left end face of the pressing base is the limiting surface of the main reducer housing. The upper part of the pressing base... A press head is provided, and a press guide seat is fitted around the outer circumference of the press head. A limiting block is provided at the top of the press head, and a limiting flange is provided at the bottom of the press head. The limiting block and the limiting flange at the bottom of the press head axially limit the press guide seat. The axial length of the press guide seat is less than the axial length of the press head. An oil seal protective sleeve is provided on the inner side of the press head. The oil seal protective sleeve is installed on the outside of the spline of the main reducer gear assembly. The centers of the press head, press guide seat, limiting block, oil seal protective sleeve, and clearance hole are located on the same axis.

[0006] The pressing head and the limiting block are fixed together by bolts.

[0007] Ventilation holes are provided at the top of the press head, the limiting block, and the oil seal protective sleeve.

[0008] The lower end of the press-fit guide seat is provided with a stop flange, which is connected and fixed to the stop groove on the main reducer housing.

[0009] The advantages of this invention are that it enables automatic guiding and centering of the main reducer oil seal during press-fitting, ensuring proper placement in one press-fitting operation and guaranteeing the oil seal height and height difference. It also features two-hand button start-up for press-fitting and light curtain protection, ensuring worker safety during operation. This tooling is an optimized design mode that effectively improves production efficiency, protects worker safety, and enhances product quality. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the assembly of the present invention with the main reducer;

[0011] Figure 2 This is a schematic diagram of the oil seal protective sleeve structure;

[0012] Figure 3 This is a schematic diagram of the press head structure;

[0013] Figure 4 This is a schematic diagram of the press-fit guide seat structure;

[0014] Figure 5 This is a schematic diagram of the assembly of the press head and the press guide seat. Detailed Implementation

[0015] like Figures 1 to 5 As shown, a pressing fixture for an automotive main reducer oil seal includes a wire press head 1, with an oil seal pressing fixture positioned below the wire press head 1. The center of the oil seal pressing fixture is on the same axis as the center of the wire press head 1. The oil seal pressing fixture includes a pressing base 6, with a clearance hole 7 in the middle of the pressing base 6. The center of the clearance hole 7 is on the same axis as the center of the main reducer gear assembly. The left end face of the pressing base 6 is a limiting surface for the main reducer housing. A pressing head 4 is positioned above the pressing base 6, with a pressing guide seat 3 fitted around the outer circumference of the pressing head 4. A limiting block 2 is positioned at the top of the pressing head 4, and the pressing head 4 and the limiting block 2 are fixed together by bolts. A limiting flange is provided at the bottom end of the press head 4. The limiting block 2 and the limiting flange at the bottom end of the press head 4 axially limit the press guide seat 3. The shaft length of the press guide seat 3 is less than the shaft length of the press head 4. An oil seal protective sleeve 5 is provided on the inner side of the press head 4. The oil seal protective sleeve 5 is installed on the outside of the spline of the main reducer gear assembly. The centers of the press head 4, press guide seat 3, limiting block 2, oil seal protective sleeve 5, and clearance hole 7 are located on the same axis. Vent holes are provided at the top of the press head 4, limiting block 2, and oil seal protective sleeve 5 to prevent atmospheric pressure from affecting the press process during oil seal press-fitting. A stop flange is provided at the lower end of the press guide seat 3, which is connected and fixed to the stop groove on the main reducer housing.

[0016] When press-fitting the oil seal of the main reducer, first brush lubricating oil onto the inner wall of the upper side of the main reducer housing. Turn the main reducer housing over, place the gear assembly into the housing, and secure it. Next, fit the oil seal protective sleeve onto the spline. The oil seal is then inserted into the main reducer housing through the protective sleeve from the lower end of the gear assembly cavity. Place the press-fitting head, equipped with a press-fitting guide seat, into the main reducer housing. Place the assembled main reducer on the press-fitting base, aligning the gear assembly cavity with the clearance hole on the press-fitting base plate. The right side of the press-fitting base provides a limit to the main reducer. Then, start the press-fitting equipment to press-fit the oil seal. The distance between the lower end face of the pressed oil seal and the supporting surface of the main reducer housing is 0.5–1.5 mm, and the height difference is ≤0.2 mm. The pressing height of the oil seal is controlled by the axial length difference between the press-fitting guide seat and the press-fitting head to avoid interference and damage between the oil seal and the main reducer housing.

[0017] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A pressure fitting fixture for an automotive main reducer oil seal, comprising a wire press head (1), wherein an oil seal pressure fitting fixture is disposed below the wire press head (1), the center of the oil seal pressure fitting fixture and the center of the wire press head (1) are located on the same axis, characterized in that: The oil seal press-fit fixture includes a press-fit base (6), a relief hole (7) is provided in the middle of the press-fit base (6), the center of the relief hole (7) is on the same axis as the center of the main reducer gear assembly, the left end face of the press-fit base (6) is the limiting surface of the main reducer housing, a press-fit head (4) is provided above the press-fit base (6), a press-fit guide seat (3) is sleeved on the outer circumference of the press-fit head (4), a limiting block (2) is provided at the top of the press-fit head (4), and a limiting block (2) is provided at the bottom of the press-fit head (4). The limiting flange, the limiting block (2) and the limiting flange at the bottom of the pressing head (4) axially limit the pressing guide seat (3). The shaft length of the pressing guide seat (3) is less than the shaft length of the pressing head (4). An oil seal protective sleeve (5) is provided on the inner side of the pressing head (4). The oil seal protective sleeve (5) is installed on the outside of the spline of the main reducer gear assembly. The centers of the pressing head (4), the pressing guide seat (3), the limiting block (2), the oil seal protective sleeve (5) and the clearance hole (7) are located on the same axis.

2. The automobile main reducer oil seal press-fitting tool according to claim 1, characterized in that: The pressing head (4) and the limiting block (2) are fixed together by bolts.

3. The automotive main reducer oil seal press-fit tooling of claim 1, wherein: Ventilation holes are provided at the top of the press head (4), the limiting block (2), and the oil seal protective sleeve (5).

4. The automotive main reducer oil seal press-fit tooling of claim 1, wherein: The lower end of the press-fit guide seat (3) is provided with a stop flange, which is connected and fixed to the stop groove on the main reducer housing.

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