Cross bearing with dust cover

Abstract

The utility model discloses a cross bearing with a dust cover, which comprises a shaft body, shaft heads, oil grooves, roller pins and a shaft sleeve, and the shaft heads are distributed on the periphery of the shaft body in a cross manner; an oil groove is formed in each shaft head, and an oil duct is formed in the top of the shaft sleeve; a shaft sleeve is arranged outside each shaft head in a sleeving manner; the shaft sleeve is rotationally connected with the shaft head through the roller pin; an oil seal assembly is arranged between the open end of the shaft sleeve and the shaft body; a dust cover is installed outside the oil seal assembly. According to the cross bearing oil seal, the dustproof cover is arranged on the oil seal assembly, the sealing performance of the cross bearing oil seal is enhanced through the dustproof cover, meanwhile, gravels can be effectively isolated, and the long-time sealing and lubricating effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of universal joint parts, and particularly relates to a cross bearing with a dust cover. Background Art

[0002] At present, most domestic cross shaft manufacturers achieve the function of storing oil in the bearing through rubber oil seals, or regularly refill oil into the bearing through the setting of oil nozzles and oil channels to ensure the lubrication of the bearing. However, in fact, the problem of insufficient sealing performance of the cross shaft cannot be well solved, and once any one of the four bearings has quality problems, it will cause the shaft body, shaft sleeve and even the whole machine to be scrapped, increasing the cost investment.

[0003] For example, a utility model with the application number 202021878896.0 discloses a low-pressure sealed long-life universal joint, which includes a cross shaft, an oil seal and an outer ring. The outer ring is sleeved on the cross shaft, and an oil seal is arranged between the opening of the outer ring and the journal of the cross shaft. The oil seal includes an oil seal skeleton with a Z-shaped cross section and a sealing lip. Another utility model with the application number 201921018678.7 discloses a new seal for a cross bearing, which includes a bearing body, a bearing sleeve, a sealing bracket, an inner O-ring, an outer O-ring and an oil injection hole; the bearing sleeve is arranged on the bearing body; the sealing bracket is arranged between the bearing body and the bearing sleeve; the inner O-ring is arranged between the bearing body and the sealing bracket; the outer O-ring is arranged between the bearing sleeve and the sealing bracket, and the inner O-ring and the outer O-ring are compressively installed.

[0004] The cross bearings in the above prior art have the following disadvantages when in use: during the rotation of the bearing, sliding friction is generated inside it, and inevitably, wear is easily caused due to friction. Only through the matching bearing rubber oil seal sealing structure, after long-term use, gravel and sand will splash up to the chassis and rub against the oil seal. After the oil seal is worn, the dimensional fit is poor, which will cause oil leakage and even the phenomenon of cross shaft jamming. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a cross bearing with a dust cover, which solves the technical problem that the existing cross bearing is worn due to internal sliding friction during rotation, and only through the matching bearing rubber oil seal sealing structure, it cannot achieve a good sealing and protection effect.

[0006] The technical solution adopted by the present utility model to solve the technical problem is: a cross bearing with a dust cover, including a shaft body, a shaft head, an oil groove, a needle roller and a shaft sleeve. The shaft heads are arranged in a cross distribution around the shaft body; an oil groove is provided in each shaft head, and an oil passage is provided at the top of the shaft sleeve; a shaft sleeve is sleeved outside each shaft head; the shaft sleeve is rotatably connected to the shaft head through the needle roller; an oil seal assembly is provided between the open end of the shaft sleeve and the shaft body; a dust cover is installed outside the oil seal assembly.

[0007] Further, the oil seal assembly includes a sheet metal and an oil seal lip; one side of the sheet metal is closely attached to the inner wall of the shaft sleeve, the other side of the sheet metal is connected to the oil seal lip, and the oil seal lip is closely attached to the outside of the shaft body.

[0008] Further, the oil seal lip includes a first lip, a second lip and a third lip, and each lip tightly presses the outside of the shaft body.

[0009] Further, the cross section of the sheet metal is in an "L" shape, including a long end and a short end; a card slot is provided on the outside of the long end of the sheet metal, and the card slot and the dust cover are installed through a buckle; the short end of the sheet metal is arranged close to the needle roller.

[0010] Further, the dust cover is approximately in a "V" shape, one end of the dust cover is closely attached to the open end of the shaft sleeve, and the other end of the dust cover is in interference fit with the outside of the shaft body.

[0011] Further, the material of the dust cover is nylon; the material of the oil seal lip in the oil seal assembly is fluororubber, and the sheet metal and the oil seal lip in the oil seal assembly are combined by vulcanization.

[0012] The beneficial effect of the present utility model is: compared with the prior art, a cross bearing with a dust cover provided by the present utility model, through the dust cover provided on the oil seal assembly, the dust cover enhances the sealing performance of the oil seal of the cross bearing, and at the same time can effectively isolate gravel and sand, achieving the effect of long-term sealed lubrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the cross bearing provided by the present utility model;

[0014] Figure 2 is a schematic cross-sectional structural diagram of the cross bearing provided by the present utility model;

[0015] Figure 3 is a schematic structural diagram of the shaft sleeve part of the cross bearing provided by the present utility model;

[0016] Figure 4 is Figure 2Enlarged view of the structure at A in the [Chinese context].

[0017] Reference numerals in the figure: 1, shaft body; 2, shaft head; 3, oil groove; 4, needle roller; 5, bushing; 6, oil seal assembly; 7, oil seal lip; 8, sheet metal; 9, dust cover. Detailed implementation manner

[0018] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0019] Embodiment

[0020] A cross bearing with a dust cover, comprising a shaft body 1, a shaft head 2, an oil groove 3, a needle roller 4 and a bushing 5. The shaft head 2 is arranged in a cross distribution around the shaft body 1; an oil groove 3 is provided in each of the shaft heads 2, and an oil passage is provided at the top of the bushing 5; a bushing 5 is sleeved outside each of the shaft heads 2; the bushing 5 is rotatably connected to the shaft head 2 through the needle roller 4; an oil seal assembly 6 is provided between the open end of the bushing 5 and the shaft body 1; a dust cover 9 is installed outside the oil seal assembly 6.

[0021] Among them, the oil seal assembly 6 includes a sheet metal 8 and an oil seal lip 7; one side of the sheet metal 8 is closely attached to the inner wall of the bushing 5, the other side of the sheet metal 8 is connected to the oil seal lip 7, and the oil seal lip 7 is closely attached to the outside of the shaft body 1.

[0022] Among them, the oil seal lip 7 includes a first lip, a second lip and a third lip, and each of the lips tightly presses against the outside of the shaft body 1.

[0023] Among them, the cross section of the sheet metal 8 is in an "L" shape, including a long end and a short end; a card slot is provided on the outside of the long end of the sheet metal 8, and the card slot is installed with the dust cover 9 through a buckle; the short end of the sheet metal 8 is arranged close to the needle roller 4.

[0024] Among them, the dust cover 9 is approximately in a "V" shape. One end of the dust cover 9 is closely attached to the open end of the bushing 5, and the other end of the dust cover 9 is in interference fit with the outside of the shaft body 1, enhancing the sealing performance of the cross bearing and achieving the effect of sealing and noise reduction.

[0025] Among them, the material of the dust cover 9 is preferably nylon, but is not limited to nylon; the material of the oil seal lip 7 in the oil seal assembly 6 is preferably fluororubber, but is not limited to fluororubber; the sheet metal 8 and the oil seal lip 7 in the oil seal assembly 6 are vulcanized and combined.

[0026] In the present utility model, since an oil groove 3 is provided on the end face of the shaft head 2 of the cross bearing, and the outside of the shaft head 2 of the cross bearing is sealed with the oil seal assembly 6, when the cross bearing rotates, the oil in the oil groove 3 continuously reaches the oil seal lip 7 through the oil passage and the gap, playing a role in lubrication and sealing, effectively preventing the wear of the cross bearing and the needle roller 4, and at the same time being able to effectively isolate gravel and grit, greatly improving the service life of the cross bearing.

[0027] The above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also belong to the scope of the present utility model, and the patent protection scope of the present utility model shall be defined by the claims.

Claims

1. A cross bearing with a dust cover, comprising a shaft body, a shaft head, an oil groove, needle rollers and a shaft sleeve, characterized in that: The shaft heads are arranged in a cross distribution around the shaft body; oil grooves are formed in each of the shaft heads, and an oil passage is formed at the top of the shaft sleeve; shaft sleeves are sleeved outside each of the shaft heads; the shaft sleeves and the shaft heads are rotatably connected through the needle rollers; a oil seal assembly is arranged between the open end of the shaft sleeve and the shaft body; a dust cover is installed outside the oil seal assembly.

2. The cross bearing with a dust cover according to claim 1, characterized in that: The oil seal assembly includes a sheet metal and an oil seal lip; one side of the sheet metal is closely attached to the inner wall of the shaft sleeve, the other side of the sheet metal is connected to the oil seal lip, and the oil seal lip is closely attached to the outside of the shaft body.

3. The cross bearing with a dust cover according to claim 2, characterized in that: The oil seal lip includes a first lip, a second lip and a third lip, and each of the lips presses tightly against the outside of the shaft body.

4. The cross bearing with a dust cover according to claim 2, wherein: The cross section of the sheet metal is in an "L" shape, including a long end and a short end; a clamping groove is arranged on the outside of the long end of the sheet metal, and the clamping groove and the dust cover are installed through a buckle; the short end of the sheet metal is close to the needle roller.

5. The cross bearing with a dust cover according to claim 1, characterized in that: The dust cover is approximately in a "V" shape, one end of the dust cover is closely attached to the open end of the shaft sleeve, and the other end of the dust cover is in interference fit with the outside of the shaft body.

6. The cross bearing with a dust cover according to claim 1, characterized in that: The material of the dust cover is nylon; the material of the oil seal lip in the oil seal assembly is fluororubber, and the sheet metal and the oil seal lip in the oil seal assembly are combined by vulcanization.

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