Self-lubricating sealing supporting mechanism

Abstract

The utility model discloses a self-lubricating sealing support mechanism, which comprises a transmission sealing sleeve, a support sleeve, a sealing cover, a bearing, a first sealing ring and a second sealing ring, the support sleeve and the sealing cover are respectively sleeved outside a transmission shaft and are detachably connected together, the transmission sealing sleeve is sleeved between the transmission shaft and the support sleeve, and the bearing is arranged on the support sleeve. The transmission sealing sleeve, the supporting sleeve and the sealing cover jointly limit the bearing arranged outside the transmission shaft in a sleeving mode, the bearing is communicated to an oil cavity of the gear oil tank, the first sealing ring is sealed between the transmission shaft and the transmission sealing sleeve, the second sealing ring is sealed between the transmission sealing sleeve and the supporting sleeve, the bearing does not need to be lubricated manually at regular intervals, and the working efficiency is improved. And self-lubrication of the bearing can be realized.

Description

Technical Field

[0001] This utility model relates to the technical field of transmission shaft sealing, and in particular to the technical field of sealing structures. Background Technology

[0002] The clutch is a key component of a vehicle's transmission system, primarily installed between the engine and the gearbox. Its core function is to control power transmission and meet the vehicle's driving needs under different operating conditions by engaging or disengaging the clutch. (See also...) Figure 1 and Figure 2 The clutch is typically equipped with a drive shaft 1 that connects to the gear oil tank 6. The drive shaft 1 also has a bearing 5 between the clutch and the gear oil tank 6, which is limited by the drive sealing sleeve 2, the support sleeve 3 and the sealing cover 4 (the drive sealing sleeve 2 and the sealing cover 4 are usually arranged on the left and right sides of the bearing 5 respectively, while the support sleeve 3 is fitted over both the drive sealing sleeve 2 and the bearing 5), a first seal 7 that seals between the drive shaft 1 and the drive sealing sleeve 2, a second seal 8 that seals between the drive sealing sleeve 2 and the support sleeve 3, and a third seal 9 that seals between the drive shaft 1 and the sealing cover 4.

[0003] However, the above structure has the following problems:

[0004] 1) In order to ensure the normal operation of bearing 5, the worker needs to lubricate bearing 5 with grease regularly (the function of the third seal 9 is to prevent the grease applied to bearing 5 from seeping into the gear oil tank 6); however, in actual operation, the worker often forgets to add grease to bearing 5, which leads to damage to bearing 5.

[0005] 2) After prolonged use, the transmission sealing sleeve 2 is prone to oil leakage due to wear. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art by proposing a self-lubricating sealing support mechanism that eliminates the need for manual periodic lubrication of the bearing, thus enabling the bearing to self-lubricate.

[0007] To achieve the above objectives, this utility model proposes a self-lubricating sealing support mechanism, including a transmission sealing sleeve, a support sleeve, a sealing cover, a bearing, a first sealing ring, and a second sealing ring. The support sleeve and the sealing cover are respectively fitted outside the transmission shaft and are detachably connected together. The transmission sealing sleeve is fitted between the transmission shaft and the support sleeve. The transmission sealing sleeve, the support sleeve, and the sealing cover together limit the bearing fitted outside the transmission shaft. The bearing is connected to the oil chamber of the gear oil tank. The first sealing ring seals between the transmission shaft and the transmission sealing sleeve, and the second sealing ring seals between the transmission sealing sleeve and the support sleeve.

[0008] Preferably, an annular oil passage is provided between the drive shaft and the sealing cover, and the oil in the oil chamber can flow from the gear oil tank to the bearing along the annular oil passage.

[0009] Preferably, the transmission sealing sleeve has a first annular groove on its inner wall, and the first sealing ring is an O-ring and is placed in the first annular groove.

[0010] Preferably, the transmission sealing sleeve has an annular protrusion on the side facing the clutch.

[0011] Preferably, the end of the transmission sealing sleeve facing the bearing is provided with a guide chamfer to facilitate the insertion of the transmission shaft.

[0012] Preferably, the drive shaft is composed of several shaft segments of varying thicknesses, and the drive sealing sleeve is further provided with a limiting step on its inner wall to restrict the insertion depth of the drive shaft.

[0013] Preferably, the support sleeve has a second annular groove on its inner wall, and the second sealing ring is a skeleton oil seal placed in the second annular groove.

[0014] Preferably, the outer wall of the transmission sealing sleeve is provided with a hardening layer.

[0015] Preferably, the hardness of the hardened layer reaches HRC50.

[0016] Preferably, the hardening layer is a chromium-plated layer with a smooth outer surface.

[0017] The beneficial effects of this utility model are:

[0018] 1) This utility model eliminates the traditional third seal between the drive shaft and the sealing cover, allowing the bearing to be directly connected to the oil chamber of the gear oil tank. This allows the oil stored in the oil chamber to flow to the bearing along the annular oil passage to achieve self-lubrication of the bearing. This not only eliminates the need for manual grease application to the bearing periodically, avoiding bearing wear or damage caused by workers forgetting to apply it, but also reduces the labor costs, material costs, and equipment downtime losses required for lubrication maintenance. Furthermore, the simplified structure reduces the replacement cost of the third seal.

[0019] 2) By setting a chrome-plated layer with a hardness of HRC50 on the outer wall of the transmission sealing sleeve, this utility model can significantly improve the surface hardness and wear resistance of the transmission sealing sleeve, reduce the oil leakage problem caused by wear during long-term use, extend the service life of the components, and improve the economy and reliability of equipment operation.

[0020] 3) By setting a first annular groove with an O-ring between the transmission sealing sleeve and the transmission shaft, and a second annular groove with a skeleton oil seal between the transmission sealing sleeve and the support sleeve, the front and rear double sealing structure can be used to effectively prevent oil leakage. In addition, the annular protrusion extending outward from the side of the transmission sealing sleeve toward the clutch can also support the sealing ring built into the clutch to further enhance the sealing effect.

[0021] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0022] Figure 1 This is an installation diagram of the existing sealing support components;

[0023] Figure 2 yes Figure 1 Enlarged schematic diagram of part of the structure;

[0024] Figure 3 This is an installation diagram of the self-lubricating sealing support mechanism of this utility model;

[0025] Figure 4 yes Figure 3 Enlarged schematic diagram of part of the structure;

[0026] Figure 5 This is a cross-sectional view of the transmission sealing sleeve of the self-lubricating sealing support mechanism of this utility model.

[0027] In the figure: 1-drive shaft, 2-drive sealing sleeve, 21-first annular groove, 22-annular protrusion, 23-guide chamfer, 24-limiting step, 3-support sleeve, 31-second annular groove, 4-sealing cover, 5-bearing, 6-gear oil tank, 7-first seal, 8-second seal, 9-third seal. Detailed Implementation

[0028] See Figure 3 , Figure 4 and Figure 5 The present invention relates to a self-lubricating sealing support mechanism, comprising a transmission sealing sleeve 2, a support sleeve 3, a sealing cover 4, a bearing 5, a first sealing ring 7, and a second sealing ring 8. The support sleeve 3 and the sealing cover 4 are respectively fitted outside the transmission shaft 1 and are detachably connected together. The transmission sealing sleeve 2 is fitted between the transmission shaft 1 and the support sleeve 3. The transmission sealing sleeve 2, the support sleeve 3, and the sealing cover 4 together limit the bearing 5 fitted outside the transmission shaft 1. The bearing 5 is connected to the oil chamber of the gear oil tank 6. The first sealing ring 7 seals between the transmission shaft 1 and the transmission sealing sleeve 2, and the second sealing ring 8 seals between the transmission sealing sleeve 2 and the support sleeve 3.

[0029] An annular oil passage is provided between the drive shaft 1 and the sealing cover 4. The oil in the oil chamber can flow from the gear oil tank 6 to the bearing 5 along the annular oil passage. With this design, during operation, the gear oil tank 6 can allow the oil stored in the oil chamber to flow directly to the bearing 5 along the annular oil passage and lubricate the bearing 5. This not only improves the lubrication effect but also eliminates the need for workers to periodically grease the bearing 5 (avoiding the hassle of periodically greasing and preventing wear caused by missed grease). In addition, since there is no longer any grease on the bearing 5, there is no need to worry about grease seeping into the gear oil tank 6 (the third seal 8 between the drive shaft 1 and the sealing cover 4 can be eliminated).

[0030] The transmission sealing sleeve 2 has a first annular groove 21 on its inner wall, and the first sealing ring 7 is an O-ring and is placed in the first annular groove 21.

[0031] The transmission sealing sleeve 2 has an annular protrusion 22 on the side facing the clutch; wherein, the annular protrusion 22 can support the sealing ring inside the clutch, thereby improving the sealing effect.

[0032] The transmission sealing sleeve 2 is provided with a guide chamfer 23 at one end facing the bearing 5 to facilitate the insertion of the transmission shaft 1; that is, the guide chamfer 23 can improve assembly efficiency by facilitating the quick insertion of the transmission shaft 1 into the transmission sealing sleeve 2.

[0033] The drive shaft 1 is composed of several shaft segments of varying thicknesses. The transmission sealing sleeve 2 is also provided with a limiting step 24 on its inner wall to limit the insertion depth of the drive shaft 1. The design of the multiple shaft segments of varying thicknesses of the drive shaft 1 can cooperate with the limiting step 24 of the transmission sealing sleeve 2, thereby precisely limiting the insertion depth of the drive shaft 1 into the transmission sealing sleeve 2, ensuring accurate installation of each component, and avoiding performance degradation due to installation errors.

[0034] The support sleeve 3 has a second annular groove 31 on its inner wall, and the second sealing ring 8 is a skeleton oil seal placed in the second annular groove 31.

[0035] The outer wall of the transmission sealing sleeve 2 is provided with a hardening layer, the hardness of which reaches HRC50. The hardening layer is a chrome-plated layer and its outer surface is polished smooth. The chrome-plated layer with a hardness of HRC50 and a smooth surface can effectively increase the surface hardness of the transmission sealing sleeve 2, making the transmission sealing sleeve 2 less prone to wear, thereby ensuring the sealing performance of the equipment.

[0036] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A self-lubricating seal support mechanism, characterized by: The system includes a transmission sealing sleeve (2), a support sleeve (3), a sealing cover (4), a bearing (5), a first sealing ring (7), and a second sealing ring (8). The support sleeve (3) and the sealing cover (4) are respectively fitted outside the transmission shaft (1) and are detachably connected together. The transmission sealing sleeve (2) is fitted between the transmission shaft (1) and the support sleeve (3). The transmission sealing sleeve (2), the support sleeve (3), and the sealing cover (4) together limit the bearing (5) fitted outside the transmission shaft (1). The bearing (5) is connected to the oil chamber of the gear oil tank (6). The first sealing ring (7) seals between the transmission shaft (1) and the transmission sealing sleeve (2), and the second sealing ring (8) seals between the transmission sealing sleeve (2) and the support sleeve (3).

2. The self-lubricating seal support mechanism of claim 1, wherein: An annular oil passage is provided between the drive shaft (1) and the sealing cover (4), and the oil in the oil chamber can flow from the gear oil tank (6) to the bearing (5) along the annular oil passage.

3. The self-lubricating seal support mechanism of claim 1, wherein: The transmission sealing sleeve (2) has a first annular groove (21) on its inner wall, and the first sealing ring (7) is an O-ring and is placed in the first annular groove (21).

4. The self-lubricating sealing support mechanism as described in claim 1, characterized in that: The transmission sealing sleeve (2) has an annular protrusion (22) on the side facing the clutch.

5. The self-lubricating sealing support mechanism as described in claim 1, characterized in that: The transmission sealing sleeve (2) has a guide chamfer (23) at one end facing the bearing (5) to facilitate the insertion of the transmission shaft (1).

6. The self-lubricating sealing support mechanism as described in claim 1, characterized in that: The drive shaft (1) is composed of several shaft segments of varying thicknesses, and the drive sealing sleeve (2) is provided with a limiting step (24) on its inner wall to limit the insertion depth of the drive shaft (1).

7. The self-lubricating sealing support mechanism as described in claim 1, characterized in that: The support sleeve (3) has a second annular groove (31) on its inner wall, and the second sealing ring (8) is a skeleton oil seal and is placed in the second annular groove (31).

8. The self-lubricating sealing support mechanism as described in any one of claims 1 to 6, characterized in that: The outer wall of the transmission sealing sleeve (2) is provided with a hardening layer.

9. The self-lubricating sealing support mechanism as described in claim 8, characterized in that: The hardness of the hardened layer reaches HRC50.

10. The self-lubricating sealing support mechanism as described in claim 8, characterized in that: The hardening layer is a chrome-plated layer with a smooth outer surface.

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