Release bearing unit with rubber sleeve with end face sealing and aligning functions

Abstract

The utility model relates to a release bearing unit with a rubber sleeve with end face sealing and aligning functions, which belongs to the technical field of release bearing structures and comprises an inner ring, a central sleeve is arranged in the inner ring, a clamp spring sleeved with the central sleeve in a clamping and embedding manner is arranged on the outer circle of the front end of the central sleeve, an outer ring sleeved with the inner ring is arranged on the inner ring, and the rubber sleeve is sleeved with the outer ring. A retainer is arranged between the outer ring and the inner ring, a plurality of steel balls which are annularly distributed and are nested with the retainer in a sliding manner are arranged on the retainer, and an end surface sealing ring which is nested with the outer ring is arranged between the end surface of the outer ring and the inner ring. The device has the characteristics of compact structure, good operation stability and long service life. And through the special design of the rubber sleeve, the product is well sealed, excessive frictional resistance is not generated, and the service life is prolonged. And the problem of poor sealing is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of release bearing structure, specifically to a release bearing unit with a rubber sleeve that has end face sealing and self-aligning function. Background Technology

[0002] Passenger vehicle release bearing units bear axial loads, have a compact size and structure, operate in harsh environments, and are not fixed during operation. During repeated acceleration, deceleration, and gear shifting, the friction plates and pressure plate experience significant wear, resulting in substantial internal dust accumulation. This dust can enter the release bearing, causing poor rotation and premature failure. Inadequate sealing design, high frictional resistance, and excessive bearing heat can also lead to premature bearing failure. Therefore, release bearings are prone to sealing problems in axially loaded environments.

[0003] Automotive clutch release bearings bear axial loads and experience axial movement during use, making axial sealing difficult to achieve. Even when axial sealing is designed, significant frictional resistance often results in high bearing heat generation and reduced lifespan. Previous products had the following drawbacks:

[0004] (1) If the parts are not properly sealed, dust can easily enter the bearing, resulting in poor rotation, short lifespan, or high frictional resistance, causing the bearing to overheat and fail prematurely.

[0005] (2) The bearing has a small internal space and small individual parts, making the design and manufacture of self-aligning elements difficult;

[0006] (3) The product structure is irregular and the assembly process is complex, making it difficult to achieve automated production. Summary of the Invention

[0007] This invention primarily addresses the shortcomings of existing technologies by providing a release bearing unit with a rubber sleeve that integrates end-face sealing and self-aligning functions. It features a compact structure, good operational stability, and long service life. The special design of the rubber sleeve ensures a good seal without generating excessive frictional resistance, thus extending service life and preventing sealing problems.

[0008] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions:

[0009] A release bearing unit with a rubber sleeve having end-face sealing and self-aligning functions includes an inner ring, a central sleeve inside the inner ring, a retaining spring on the outer circumference of the front end of the central sleeve that is fitted into the central sleeve, an outer ring fitted onto the inner ring, a cage between the outer ring and the inner ring, a plurality of steel balls arranged in a ring and slidably nested with the cage on the cage, and an end-face sealing ring nested between the end face of the outer ring and the inner ring.

[0010] Preferably, a rubber sleeve is provided between the inner ring and the center sleeve, connecting the inner ring and the center sleeve together. The rubber sleeve contacts the inner wall of the outer ring, achieving end-face sealing of the bearing.

[0011] Preferably, the rubber sleeve includes a curved sleeve body, and a sealing lip integral with the curved sleeve body is provided between one end of the curved sleeve body and the inner wall of the outer ring.

[0012] Preferably, the inner diameter of the curved sleeve and the central sleeve are provided with several triangular protrusions distributed in an evenly spaced ring. The inner diameter of the rubber sleeve is provided with 24 triangular protrusions and connected to the outer diameter of the central sleeve; the outer diameter of the rubber sleeve is provided with the curved sleeve body and the inner ring, realizing the connection and self-alignment of the bearing unit.

[0013] Preferably, a fixing plate is provided between the retaining ring and the inner ring, which is nested and pressed against the center sleeve.

[0014] Preferably, a wave spring is provided between the inner front face of the outer ring and the inner wall of the end face sealing ring.

[0015] Take all parts from the warehouse and remove the outer packaging from the steel balls, sealing rings, and center sleeves. Clean them with 120# gasoline or cleaning agent. Note that steel balls of different sizes should be cleaned separately and not mixed. Use within 2 working days after cleaning.

[0016] a. Place the wave spring into the sealing ring.

[0017] b. Load the steel balls into the cage, ensuring that there are 17 steel balls in total, with no missing balls.

[0018] c. Place the steel ball and cage into the sealing ring.

[0019] d. Insert the outer ring into the sealing ring.

[0020] e. Use a hydraulic press to rivet the sealing ring and the outer ring together.

[0021] f. Adjust the air pressure of the grease pump to 0.3-0.4MPa, continuously adjust the positioning nut of the grease pump, and perform a test injection of grease to achieve a single grease output of 1.6-2.1g. Finally, tighten the positioning nut.

[0022] g. Select the inner ring of the corresponding size and insert the outer ring component.

[0023] h. Use a pneumatic press to press the inner ring into the outer ring.

[0024] i. Insert the rubber sleeve into the inner diameter of the bearing inner ring to make the bearing component.

[0025] j. Deliver the bearing assembly to the vibration meter and remove the corresponding fixture. Adjust the preload pressure to 200-250N, place the bearing assembly on the fixture, adjust the position of the measuring head, apply pressure to the bearing assembly, start the vibration meter, and read the degree value, which is the vibration value of the bearing being tested.

[0026] k. Use a go / no-go gauge to inspect the inner diameter of the incoming center sleeve 100%. Disqualified products should be rejected, while qualified products should be transferred to the next process.

[0027] 1. Move the inspected and qualified center sleeve and bayonet spring into the assembly area; manually install the bayonet spring into the center sleeve.

[0028] m. Manually install the bearing components into the small end of the center sleeve.

[0029] n. Move the product to the self-aligning force testing area. Replace the test mandrel of the self-aligning force tester with the mandrel corresponding to the product; place the inner hole of the product to be tested into the mandrel; press the load block in the center onto the product; adjust the force gauge on the tester to zero; turn the measuring loading knob of the tester so that the probe of the force gauge and the probe of the displacement sensor are against the product, slowly turn the knob to make the pointer of the displacement sensor change, continue to turn the knob until the pointer of the displacement sensor increases to 0.5mm, record the reading of the force gauge pointer at this time, which is the self-aligning force of the product being measured, and then turn the knob back; rotate the product on the mandrel about 120°; repeat the above actions and measure the self-aligning force of the product again; finally, rotate the product about 120° twice more and repeat the above actions, measuring the self-aligning force 4 times; usually, the self-aligning force value measured in the first measurement is not included, and the average value of the last 3 measurements is the self-aligning force of the product being tested.

[0030] The release bearing unit with end face sealing and self-aligning rubber sleeve has been completed.

[0031] This invention can achieve the following effects:

[0032] This invention provides a release bearing unit with a rubber sleeve featuring end-face sealing and self-aligning function. Compared with existing technologies, it features a compact structure, good operational stability, and long service life. The special design of the rubber sleeve ensures a good seal without generating excessive frictional resistance, thus extending service life and preventing sealing problems. Attached Figure Description

[0033] Figure 1 This is a side view of the structure of this utility model.

[0034] Figure 2 This is a schematic diagram of the rear view structure of this utility model.

[0035] Figure 3 This is a structural cross-sectional view of the present invention.

[0036] Figure 4 This is a cross-sectional view of the rubber sleeve in this utility model.

[0037] Figure 5 This is a top view of the rubber sleeve in this utility model.

[0038] In the diagram: outer ring 1, end face sealing ring 2, inner ring 3, fixing plate 4, snap ring 5, center sleeve 6, rubber sleeve 7, retainer 8, steel ball 9, wave spring 10, sealing lip 11, curved sleeve 12, triangular protrusion 13. Detailed Implementation

[0039] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0040] Example: Figure 1-5 As shown, a release bearing unit with a rubber sleeve that provides end-face sealing and self-aligning function includes an inner ring 3, a central sleeve 6 inside the inner ring 3, and a rubber sleeve 7 between the inner ring 3 and the central sleeve 6, connecting the inner ring 3 and the central sleeve 6 together. The rubber sleeve 7 includes a curved sleeve body 12, with a sealing lip 11 integrally formed between one end of the curved sleeve body 12 and the inner wall of the outer ring 1. Twenty-four equally spaced triangular protrusions 13 are arranged in a ring between the inner diameter of the curved sleeve body 12 and the central sleeve 6. A retaining spring 5 is provided on the outer circumference of the front end of the central sleeve 6, which is fitted into the central sleeve 6. A fixing plate 4, nested and pressed between the retaining spring 5 and the inner ring 3, is also provided. An outer ring 1 is fitted onto the inner ring 3. A retainer 8 is provided between the outer ring 1 and the inner ring 3. The retainer 8 has 12 steel balls 9 arranged in a ring and slidably nested with the retainer 8. An end face sealing ring 2 nested with the outer ring 1 is provided between the end face of the outer ring 1 and the inner ring 3. A wave spring 10 is provided between the inner front face of the outer ring 1 and the inner wall of the end face sealing ring 2.

[0041] The sealing lip 11 on the end face of the rubber sleeve 7 contacts the inner surface of the outer ring 1, forming an end face sealing structure. Several triangular protrusions 13 are provided on the inner diameter of the rubber sleeve 7. When the bearing needs to be aligned during operation, the flexible characteristics of the rubber allow it to achieve the alignment function under a certain external force.

[0042] In summary, this release bearing unit with end-face sealing and self-aligning rubber sleeve features a compact structure, good operational stability, and long service life. Since the release bearing unit with end-face sealing and self-aligning rubber sleeve is exposed to dust during operation, sealing is particularly important. The special design of the rubber sleeve ensures a good seal without generating excessive frictional resistance, thus extending service life and preventing sealing problems.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A release bearing unit with a rubber sleeve for end face sealing and self-aligning function, characterized in that: The device includes an inner ring (3), within which a central sleeve (6) is provided. A retaining spring (5) is provided on the outer circumference of the front end of the central sleeve (6) and engages with it. An outer ring (1) is provided on the inner ring (3) and engages with it. A retainer (8) is provided between the outer ring (1) and the inner ring (3). The retainer (8) is provided with several steel balls (9) arranged in a ring and slidably nested with the retainer (8). The end face of the outer ring (1) is connected to the inner ring (3). An end face sealing ring (2) nested with the outer ring (1) is provided; a rubber sleeve (7) is provided between the inner ring (3) and the center sleeve (6), the rubber sleeve (7) connects the inner ring (3) and the center sleeve (6) together, the rubber sleeve (7) contacts the inner wall of the outer ring (1) to achieve end face sealing of the bearing; the rubber sleeve (7) includes a curved sleeve body (12), one end of the curved sleeve body (12) is provided with a sealing lip (11) integrated with the inner wall of the outer ring (1).

2. The release bearing unit with end-face sealing and self-aligning rubber sleeve according to claim 1, characterized in that: The inner diameter of the curved sleeve (12) and the central sleeve (6) are provided with a number of triangular protrusions (13) that are distributed in an equal-spaced ring.

3. The release bearing unit with end-face sealing and self-aligning rubber sleeve according to claim 1, characterized in that: The retaining ring (5) and the inner ring (3) are provided with a fixing plate (4) that is nested and pressed with the center sleeve (6).

4. The release bearing unit with end-face sealing and self-aligning rubber sleeve according to claim 1, characterized in that: A wave spring (10) is provided between the inner front face of the outer ring (1) and the inner wall of the end face sealing ring (2).

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