A self-lubricating steering gear bearing

Abstract

This invention relates to the technical field of bearing lubrication structures, and more particularly to a self-lubricating steering gear bearing. It includes a bearing, a partition plate, a mounting bracket, connecting rings, and a first sealing ring. The bearing is mounted inside a fixed seat on the steering gear body. The partition plate is circumferentially connected to the bearing cage, and is located between two adjacent balls. The mounting bracket is connected to the fixed seat, and two connecting rings are both connected to the mounting bracket, distributed internally and externally. The first sealing ring is connected to the bottom of the connecting rings. This invention, through the cooperation of the partition plate, connecting rings, sliding frame, feeding assembly, and waste removal assembly, can automatically complete the replacement of the grease inside the bearing, and can effectively remove sludge from inside the bearing while replacing the grease. Therefore, it eliminates the need for periodic disassembly of the steering gear bearing, making operation simple and convenient, reducing maintenance costs and workload, and ensuring long-term stable operation of the bearing.

Description

Technical Field

[0001] This invention relates to the technical field of bearing lubrication structures, and more particularly to a self-lubricating steering gear bearing. Background Technology

[0002] With the rapid development of the automotive industry, the requirements for automotive parts are becoming increasingly stringent, especially for the steering system, a key component that ensures driving safety and comfort. In the steering system, the steering gear bearing, as a key component connecting the steering shaft and the steering gear, undertakes the important task of transmitting steering torque.

[0003] Traditional steering gear bearings typically use grease lubrication, which involves adding a certain amount of grease during bearing assembly to reduce friction and ensure normal operation. However, this lubrication method has significant limitations. First, with prolonged use, wear inevitably occurs inside the bearing. The metal debris generated by this wear mixes with the grease, forming sludge. The formation of sludge not only increases the internal frictional resistance of the bearing and reduces its operating efficiency, but also further accelerates bearing wear, creating a vicious cycle. In addition, due to the presence of sludge, the lubrication effect of the bearing gradually weakens, leading to premature bearing failure.

[0004] To maintain good lubrication and extend bearing life, bearings must be maintained regularly, including disassembling the bearing and replacing the internal grease. This process is not only time-consuming and labor-intensive, but also requires professional skills and tools, which can cause great inconvenience to users. More seriously, if maintenance is not performed in time, the bearing may be damaged due to insufficient lubrication, which usually requires the replacement of the entire bearing, which will undoubtedly increase maintenance costs significantly. Summary of the Invention

[0005] In view of this, the present invention provides a self-lubricating steering gear bearing, which overcomes the disadvantages of existing steering gear bearings that require periodic disassembly and replacement of internal grease during use, which is cumbersome.

[0006] The technical solution of the present invention is as follows: a self-lubricating steering gear bearing, comprising a bearing, a partition plate, a fixed frame, a connecting ring, a first sealing ring, a connecting pipe, an electric push rod, a connecting rod, a sliding frame, a waste discharge assembly, and a feeding assembly. The bearing is installed inside a fixed seat on the steering gear body. The partition plate is circumferentially connected to the bearing cage and is located between two adjacent balls. The fixed frame is connected to the fixed seat. Two connecting rings are both connected to the fixed frame and are distributed in an inner and outer manner. The first sealing ring is connected to the bottom of the connecting ring and the two first sealing rings respectively contact the top of the outer ring and the top of the inner ring of the bearing. The connecting pipe is connected to the fixed seat, and the end of the connecting pipe is connected to and maintains communication with the outer connecting ring. The electric push rod is installed on the inner wall of the fixed seat. The connecting rod is connected to the telescopic rod of the electric push rod. The sliding frame is slidably connected between the two connecting rings and is connected to the end of the connecting rod. The waste discharge assembly is used to discharge sludge from inside the bearing, and the feeding assembly is used to transport new grease to the inside of the bearing through the connecting pipe.

[0007] As a preferred embodiment of the present invention, the waste discharge assembly includes a collection frame, a second sealing ring, and a waste discharge pipe. The collection frame is connected to the inner wall of the fixed base, and the two second sealing rings are both connected to the top of the collection frame. The two second sealing rings are respectively in contact with the bottom of the outer ring and the bottom of the inner ring of the bearing. The waste discharge pipe is connected to the fixed base, and the end of the waste discharge pipe is connected to the collection frame and maintains communication.

[0008] As a preferred embodiment of the present invention, the feeding assembly includes a storage frame, a feeding pipe, a pump, a suction pipe, and a discharge pipe. The storage frame is connected to a fixed base, the feeding pipe is connected to the top of the storage frame, the pump is installed on the side of the storage frame, the two ends of the suction pipe are respectively connected to the inlet of the pump and the top of the storage frame, and the two ends of the discharge pipe are respectively connected to the outlet of the pump and the end of the connecting pipe.

[0009] As a preferred embodiment of the present invention, it further includes an annular plate, a sliding tube, and a connecting spring. The two annular plates are respectively connected to the connecting ring and the inner wall of the collecting frame. The sliding tube is circumferentially slidably connected to the annular plate, and the sliding tube has through holes circumferentially spaced. The two ends of the connecting spring are respectively connected to the annular plate and the sliding tube.

[0010] As a preferred embodiment of the present invention, it further includes a guide rod, a sliding plate, and a return spring. The guide rod is symmetrically connected inside the storage frame, the sliding plate is slidably connected to the guide rod and contacts the inner wall of the storage frame, and the two ends of the return spring are respectively connected to the sliding plate and the storage frame.

[0011] As a preferred embodiment of the present invention, it further includes a first check valve, a second check valve, and a third check valve. The first check valve is installed on the waste discharge pipe, the second check valve is installed on the feed pipe, and the third check valve is installed on the discharge pipe.

[0012] As a preferred embodiment of the present invention, it further includes a fixed sleeve, a conical frame, a sealing sleeve, and an oil seal spring. The fixed sleeve is connected to the shaft, the conical frame is connected to the top of the fixed seat, the sealing sleeve is connected to the conical frame, and the sealing sleeve wraps around the outside of the fixed sleeve. The oil seal spring is wound around the outside of the sealing sleeve at intervals.

[0013] As a preferred embodiment of the present invention, it further includes a protective sleeve, which is spaced apart and connected to the outside of the sealing sleeve, and the oil seal spring is located inside the protective sleeve.

[0014] Beneficial effects: 1. The present invention can automatically complete the replacement of the grease inside the bearing by means of the cooperation of the partition, connecting ring, sliding frame, feeding component and waste discharge component. At the same time, it can effectively remove the sludge inside the bearing while replacing the grease, so that the steering gear bearing does not need to be disassembled regularly. The operation is simple and convenient, which can reduce maintenance costs and workload and ensure the long-term stable operation of the bearing.

[0015] 2. By designing a sealing sleeve and an oil seal spring, this invention can effectively prevent external moisture and other contaminants from entering the bearing, avoid contaminating the internal lubricating grease, thereby ensuring the normal operation and performance of the bearing, extending the bearing's service life, and ensuring the safety and reliability of the steering system. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention installed on the steering gear body.

[0017] Figure 2 This is a schematic diagram of the bearing installation and an exploded view of the present invention.

[0018] Figure 3 This is a cross-sectional view of the mounting bracket on the steering gear body.

[0019] Figure 4 This is a schematic diagram of the specific structure of the connecting ring, sliding frame, and collecting frame of the present invention.

[0020] Figure 5 This is a schematic diagram of the installation of the feeding assembly of the present invention.

[0021] Figure 6 This is a schematic diagram showing the installation of the annular plate, sliding tube, and connecting spring of the present invention.

[0022] Figure 7 This is a schematic diagram of the specific structure of the sliding tube of the present invention.

[0023] Figure 8 This is a schematic diagram showing the installation of the guide rod, sliding plate, and return spring of the present invention.

[0024] Figure 9This is a schematic diagram showing the installation of the fixing sleeve, conical frame, sealing sleeve, oil seal spring, and protective sleeve of the present invention.

[0025] The components in the diagram are labeled as follows: 1-Steering gear body, 2-Fixed seat, 3-Bearing, 301-Outer ring, 302-Inner ring, 303-Cage, 304-Ball, 4-Shaft, 5-Partition plate, 6-Fixed bracket, 7-Connecting ring, 8-First sealing ring, 9-Connecting pipe, 10-Electric push rod, 11-Connecting rod, 12-Sliding frame, 13-Collection frame, 1301-Second sealing ring, 14-Waste discharge pipe, 15-Storage frame. 1501-Feeding pipe, 16-Suction pump, 17-Suction pipe, 18-Discharge pipe, 19-Annular plate, 20-Sliding pipe, 2001-Through hole, 21-Connecting spring, 22-Guide rod, 23-Sliding plate, 24-Reset spring, 25-First check valve, 26-Second check valve, 27-Third check valve, 28-Fixing sleeve, 29-Conical frame, 30-Sealing sleeve, 31-Oil seal spring, 32-Protective sleeve. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example: A mounting base 2 is installed on the top of the steering gear body 1. The mounting base 2 is cylindrical in shape, and the shaft 4 is installed inside the mounting base 2 via a bearing 3; a self-lubricating steering gear bearing, such as... Figure 1-Figure 5 As shown, the assembly includes a bearing 3, a partition 5, a fixing frame 6, a connecting ring 7, a first sealing ring 8, a connecting pipe 9, an electric push rod 10, a connecting rod 11, a sliding frame 12, a waste discharge assembly, and a feeding assembly. The bearing 3 consists of an outer ring 301, an inner ring 302, a cage 303, and balls 304. The inner wall of the fixing seat 2 is connected to the outer ring 301, and the inner ring 302 is located inside the outer ring 301. A cage 303 is located between the inner ring 302 and the outer ring 301. Multiple balls 304 are rotatably connected to the cage 303 in a circumferential manner. All balls 304 are connected to the outer ring 301. The inner wall of the inner ring 301 contacts the outer wall of the inner ring 302. Under the action of the balls 304, the inner ring 302 can rotate freely within the outer ring 301. The bearing 3 is existing technology and will not be described in detail here. Multiple partitions 5 are circumferentially spaced on both the inner and outer sides of the cage 303. The partitions 5 do not contact the outer ring 301 and the inner ring 302, thus not affecting the free rotation of the inner ring 302. Each partition 5 is located between two adjacent balls 304. A fixing bracket 6 is connected to the rear side of the inner wall of the fixing seat 2. The fixing bracket 6 is located above the bearing 3. The lower end of the fixing frame 6 is connected to two connecting rings 7, which are distributed inwards and outwards, forming a cavity for storing grease between the two connecting rings 7. The bottom of the cavity is in communication with the top of the retainer 303. Each connecting ring 7 has a first sealing ring 8 connected to its bottom, and the bottom of the two first sealing rings 8 contacts the top of the outer ring 301 and the top of the inner ring 302 of the bearing 3, respectively. The first sealing rings 8 are used to block the gaps between the connecting rings 7 and the outer ring 301 and the inner ring 302, thus sealing the cavity and preventing the grease from entering. Overflow, the upper left side of the fixed seat 2 is connected to the connecting pipe 9, one end of the connecting pipe 9 is connected to the left side of the outer connecting ring 7 and keeps in communication, the left side of the inner wall of the fixed seat 2 is connected to the electric push rod 10, the telescopic rod of the electric push rod 10 is connected to the connecting rod 11, the two connecting rings 7 are connected to the sliding frame 12, and the sliding frame 12 is fixedly connected to the end of the connecting rod 11. The bottom of the sliding frame 12 blocks the top of the above-mentioned cavity. The waste discharge component is used to discharge the sludge inside the bearing 3, and the feeding component is used to transport new grease to the inside of the bearing 3 through the connecting pipe 9.

[0031] like Figure 3 and Figure 4As shown, the waste discharge assembly includes a collection frame 13, a second sealing ring 1301, a waste discharge pipe 14, and a first one-way valve 25. The collection frame 13 is connected to the inner wall of the fixing seat 2. The collection frame 13 is located below the bearing 3. The top of the collection frame 13 is an open design, and the top of the collection frame 13 is in communication with the bottom of the retainer 303. Two second sealing rings 1301 are connected to the top of the collection frame 13, and the two second sealing rings 1301 are in contact with the bottom of the outer ring 301 and the bottom of the inner ring 302 of the bearing 3, respectively. The second sealing rings 1301 are used to block the gap between the collection frame 13 and the outer ring 301 and the inner ring 302, and play a sealing role to prevent sludge from overflowing. The waste discharge pipe 14 is connected to the lower left side of the fixing seat 2. One end of the waste discharge pipe 14 is connected to the left side of the collection frame 13 and is in communication with it. The first one-way valve 25 is installed on the waste discharge pipe 14.

[0032] like Figure 5 As shown, the feeding assembly includes a storage frame 15, a feeding pipe 1501, a pump 16, a suction pipe 17, a discharge pipe 18, a second check valve 26, and a third check valve 27. The storage frame 15 is connected to the rear side of the outer wall of the fixed base 2. The feeding pipe 1501 is connected to the rear side of the top of the storage frame 15. The lubricant can be manually added into the storage frame 15 through the feeding pipe 1501. A dust cover is threaded to the top of the feeding pipe 1501 to prevent external dust from entering the storage frame 15. The second check valve 26 is installed on the feeding pipe 1501. The pump 16 is installed on the left side of the storage frame 15. The suction pipe 17 is connected between the inlet of the pump 16 and the top of the storage frame 15. The discharge pipe 18 is connected between the outlet of the pump 16 and the other end of the connecting pipe 9. The third check valve 27 is installed on the discharge pipe 18.

[0033] Initially, a suitable amount of grease can be manually injected into the storage frame 15 through the feeding pipe 1501. The second one-way valve 26 prevents the grease in the storage frame 15 from overflowing through the feeding pipe 1501. When the grease inside the bearing 3 needs to be replaced, the suction pump 16 can be started first. The suction pump 16 can extract the grease from the storage frame 15 through the suction pipe 17. At the same time, the suction pump 16 can deliver the extracted grease to the connecting pipe 9 through the discharge pipe 18. The third one-way valve 27 can prevent the grease in the connecting pipe 9 from flowing back, so that all the grease in the connecting pipe 9 can enter the cavity between the two connecting rings 7. After the cavity is filled with grease, the suction pump 16 is turned off. Then, the electric push rod 10 is controlled to drive the connecting rod 11 and the sliding frame 12 to move downward. The sliding frame 12 will enter the cavity and squeeze the grease in the cavity. Under the limiting and guiding action of the connecting ring 7, all the grease in the cavity can be transported downward. The grease enters the cage 303 of the bearing 3. Under the action of the partition 5, the grease can flow evenly to each ball 304. The grease can squeeze the sludge on the cage 303 and the balls 304 downward, so that the sludge falls into the collection frame 13 and is discharged downward through the waste pipe 14. The first one-way valve 25 can prevent external impurities from entering the collection frame 13 through the waste pipe 14. At this time, the outer wall of the sliding frame 12 can block the end of the connecting pipe 9, thereby preventing the end of the connecting pipe 9 from being exposed to the air, thus ensuring the cleanliness of the inside of the connecting pipe 9. Finally, the electric push rod 10 drives the connecting rod 11 and the sliding frame 12 to move upward and reset, so that the sliding frame 12 leaves the cavity and the outer wall of the sliding frame 12 no longer blocks the end of the connecting pipe 9, making it easier for the connecting pipe 9 to deliver new grease into the cavity next time. In this way, the replacement of the grease inside the bearing 3 can be completed automatically. The operation is simple and can extend the service life of the bearing 3.

[0034] like Figure 6 and Figure 7 As shown, it also includes an annular plate 19, a sliding tube 20, and a connecting spring 21. The annular plate 19 is connected to the lower side of the cavity and the annular plate 19 is also connected to the upper side of the collection frame 13. There are two annular plates 19. Multiple sliding tubes 20 are circumferentially connected to each of the two annular plates 19. The upper end of the sliding tube 20 is open and the lower end is closed. The lower end of the sliding tube 20 is in contact with the bottom of the annular plate 19. The sliding tube 20 has through holes 2001 circumferentially spaced. The connecting spring 21 is wrapped around the outside of the sliding tube 20. The two ends of the connecting spring 21 are connected to the annular plate and the sliding tube 20, respectively.

[0035] Initially, the two annular plates 19 are located on the upper and lower sides of the bearing 3, respectively, so that the bottom of the cavity and the top of the collection frame 13 are not connected to the retainer 303. When the sliding frame 12 moves downward and squeezes the grease in the cavity, the grease in the cavity will push the upper sliding tube 20 downward, and the upper connecting spring 21 will be compressed, so that the lower end of the upper through hole 2001 protrudes from the bottom of the upper annular plate 19. At this time, the bottom of the cavity and the retainer 303 are connected through the upper through hole 2001, and the grease in the cavity enters the retainer 303 through the upper through hole 2001. The upper annular plate 19 blocks the sludge from moving upward, ensuring that the sludge can only move downward. Similarly, the downward movement of the sludge in the retainer 303 will squeeze the lower sliding tube 20 downward, and the lower connecting spring will... 21 is compressed so that the lower end of the lower through hole 2001 protrudes from the bottom of the lower annular plate 19. At this time, the top of the collection frame 13 and the retainer 303 are connected through the lower through hole 2001. The sludge in the retainer 303 can fall into the collection frame 13 through the lower through hole 2001. The lower annular plate 19 is always blocked between the top of the collection frame 13 and the bottom of the retainer 303 to prevent the new grease in the retainer 303 from mixing with the sludge in the collection frame 13. When the sliding frame 12 moves upward to reset, the grease and sludge are not compressed. The connecting spring 21 will return to its original state and drive the sliding tube 20 to move upward to reset so that the lower end of the through hole 2001 no longer protrudes from the bottom of the annular plate 19, so that the bottom of the cavity and the top of the collection frame 13 return to the state of non-communication with the retainer 303.

[0036] like Figure 8 As shown, it also includes guide rods 22, sliding plates 23, and return springs 24. Guide rods 22 are connected to both the left and right sides of the storage frame 15. A sliding plate 23 is slidably connected between the two guide rods 22. The shape of the sliding plate 23 matches the cross-sectional shape of the storage frame 15, and the outer wall of the sliding plate 23 fits against the inner wall of the storage frame 15. Return springs 24 are wound around the outer sides of both guide rods 22, and the two ends of the return springs 24 are respectively connected to the bottom of the sliding plate 23 and the bottom of the storage frame 15. An air hole (not shown in the figure) is opened at the bottom of the storage frame 15. When grease is manually injected into the storage frame 15, the grease will... When the sliding plate 23 moves downward along the guide rod 22, the return spring 24 is compressed, and the air in the storage frame 15 is discharged out through the air hole. When the pump 16 extracts the grease in the storage frame 15 through the extraction pipe 17, as the grease in the storage frame 15 decreases, the return spring 24 will gradually return to its original state, driving the sliding plate 23 to move upward along the guide rod 22 to reset. The sliding plate 23 can push the grease in the storage frame 15 upward to ensure the extraction effect of the extraction pipe 17 on the grease. At this time, outside air can enter the storage frame 15 through the air hole to ensure the stable air pressure in the storage frame 15.

[0037] like Figure 9 As shown, it also includes a fixed sleeve 28, a conical frame 29, a sealing sleeve 30, an oil seal spring 31, and a protective sleeve 32. The fixed sleeve 28 is connected to the outer wall of the shaft 4, and the conical frame 29 is connected to the top of the fixed seat 2. The sealing sleeve 30 is connected to the upper end of the conical frame 29. The sealing sleeve 30 is made of rubber, and the inner wall of the sealing sleeve 30 contacts the outer wall of the fixed sleeve 28. When the shaft 4 rotates, the fixed sleeve 28 will rotate synchronously with the shaft 4. Since the fixed sleeve 28 is made of ceramic and has a smooth outer wall, the friction between the fixed sleeve 28 and the sealing sleeve 30 can be reduced, thus reducing the wear of the sealing sleeve 30. Three oil seal springs 31 are spaced apart on the upper outer side. The oil seal springs 31 are annular in shape. Three protective sleeves 32 are spaced apart on the upper outer side of the sealing sleeve 30, and the oil seal springs 31 are located inside the protective sleeves 32. Under the elastic force of the oil seal springs 31, the upper inner wall of the sealing sleeve 30 can be tightly attached to the upper outer side of the fixing sleeve 28, preventing external moisture from entering the bearing 3 through the gap between the fixing sleeve 28 and the sealing sleeve 30, thus playing a sealing role and extending the service life of the bearing 3. The protective sleeves 32 can also protect the oil seal springs 31 and prevent them from being exposed to air and rusting.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A self-lubricating steering gear bearing, comprising a bearing (3), the bearing (3) being mounted inside a mounting seat (2) on a steering gear body (1), and the bearing (3) comprising an outer ring (301), an inner ring (302), a cage (303), and balls (304), characterized in that, It also includes a partition (5), a fixing frame (6), a connecting ring (7), a first sealing ring (8), a connecting pipe (9), an electric push rod (10), a connecting rod (11), a sliding frame (12), a waste discharge assembly, and a feeding assembly. The partition (5) is circumferentially spaced on the cage (303) of the bearing (3), and the partition (5) is located between two adjacent balls (304). The fixing frame (6) is connected to the fixing seat (2). Both connecting rings (7) are connected to the fixing frame (6), and the two connecting rings (7) are distributed inside and outside. The first sealing ring (8) is connected to the bottom of the connecting ring (7), and the two first sealing rings (8) are respectively The connecting pipe (9) is connected to the fixed seat (2) and the end of the connecting pipe (9) is connected to the outer ring (7) and kept in communication. The electric push rod (10) is installed on the inner wall of the fixed seat (2). The connecting rod (11) is connected to the telescopic rod of the electric push rod (10). The sliding frame (12) is slidably connected between the two connecting rings (7) and the end of the sliding frame (12) is connected to the end of the connecting rod (11). The waste discharge assembly is used to discharge the sludge inside the bearing (3). The feeding assembly is used to transport new grease to the inside of the bearing (3) through the connecting pipe (9). The waste discharge assembly includes a collection frame (13), a second sealing ring (1301), and a waste discharge pipe (14). The collection frame (13) is connected to the inner wall of the fixed seat (2). The two second sealing rings (1301) are both connected to the top of the collection frame (13), and the two second sealing rings (1301) are in contact with the bottom of the outer ring (301) and the bottom of the inner ring (302) of the bearing (3), respectively. The waste discharge pipe (14) is connected to the fixed seat (2), and the end of the waste discharge pipe (14) is connected to the collection frame (13) and keeps in communication. The feeding assembly includes a storage frame (15), a feeding pipe (1501), a pump (16), a suction pipe (17), and a discharge pipe (18). The storage frame (15) is connected to the fixed base (2). The feeding pipe (1501) is connected to the top of the storage frame (15). The pump (16) is installed on the side of the storage frame (15). The two ends of the suction pipe (17) are connected to the inlet of the pump (16) and the top of the storage frame (15), respectively. The two ends of the discharge pipe (18) are connected to the outlet of the pump (16) and the end of the connecting pipe (9), respectively.

2. The self-lubricating steering gear bearing as described in claim 1, characterized in that, It also includes an annular plate (19), a sliding tube (20) and a connecting spring (21). The two annular plates (19) are respectively connected to the inner wall of the connecting ring (7) and the collecting frame (13). The sliding tube (20) is circumferentially slidably connected to the annular plate (19), and the sliding tube (20) has through holes (2001) circumferentially spaced. The two ends of the connecting spring (21) are respectively connected to the annular plate (7) and the sliding tube (20).

3. A self-lubricating steering gear bearing as described in claim 2, characterized in that, It also includes a guide rod (22), a sliding plate (23) and a return spring (24). The guide rod (22) is symmetrically connected inside the storage frame (15). The sliding plate (23) is slidably connected to the guide rod (22) and contacts the inner wall of the storage frame (15). The two ends of the return spring (24) are connected to the sliding plate (23) and the storage frame (15) respectively.

4. A self-lubricating steering gear bearing as described in claim 3, characterized in that, It also includes a first check valve (25), a second check valve (26) and a third check valve (27). The first check valve (25) is installed on the waste discharge pipe (14), the second check valve (26) is installed on the feed pipe (1501), and the third check valve (27) is installed on the discharge pipe (18).

5. A self-lubricating steering gear bearing as described in claim 4, characterized in that, It also includes a fixed sleeve (28), a conical frame (29), a sealing sleeve (30) and an oil seal spring (31). The fixed sleeve (28) is connected to the shaft (4), the conical frame (29) is connected to the top of the fixed seat (2), the sealing sleeve (30) is connected to the conical frame (29), and the sealing sleeve (30) is wrapped around the outside of the fixed sleeve (28). The oil seal spring (31) is wound around the outside of the sealing sleeve (30) at intervals.

6. A self-lubricating steering gear bearing as described in claim 5, characterized in that, It also includes a protective sleeve (32), which is spaced apart from the outside of the sealing sleeve (30), and the oil seal spring (31) is located inside the protective sleeve (32).

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