Self-lubricating steering gear bearing

Abstract

The invention relates to the technical field of bearing lubricating structures, in particular to a self-lubricating steering gear bearing. Comprising a bearing, partition plates, a fixing frame, two connecting rings, a first sealing ring and the like, the bearing is installed in a fixing base on a steering gear body, the partition plates are connected to a retainer of the bearing at intervals in the circumferential direction, the partition plates are located between two adjacent balls, the fixing frame is connected to the fixing base, and the two connecting rings are connected to the fixing frame. The two connecting rings are distributed inside and outside, and the first sealing rings are connected to the bottoms of the connecting rings. Through cooperation of the partition plate, the connecting ring, the sliding frame, the feeding assembly and the waste discharging assembly, lubricating grease in the bearing can be automatically replaced, oil sludge in the bearing can be effectively discharged while the lubricating grease is replaced, and therefore the steering gear bearing does not need to be disassembled regularly, operation is easy and convenient, and the working efficiency is improved. The maintenance cost and workload can be reduced, and long-term stable operation of the bearing is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of bearing lubrication structures, and in particular to a self-lubricating steering gear bearing. Background Art

[0002] With the rapid development of the automobile industry, the requirements for automobile parts are getting higher and higher, especially for the key component to ensure driving safety and comfort - the steering system. 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 the steering torque.

[0003] Traditional steering gear bearings are usually lubricated with grease, that is, a certain amount of grease is added during bearing assembly to reduce friction and ensure normal operation. However, this lubrication method has obvious limitations. First, as the use time increases, wear will inevitably occur inside the bearing. The metal debris generated by this wear will mix into the grease to form sludge. The formation of sludge will not only increase the friction resistance inside the bearing and reduce its operating efficiency, but also further accelerate the wear of the bearing, forming a vicious cycle. In addition, due to the presence of sludge, the lubrication effect of the bearing is gradually weakened, leading to premature failure of the bearing.

[0004] In order to maintain good lubrication and extend the service life of bearings, bearings must be maintained regularly, including disassembling the bearings and replacing the internal grease. This process is not only time-consuming and labor-intensive, but also requires professional technology and tools, which will bring great inconvenience to users. What is more serious is that if maintenance is not carried out in time, the bearings may be damaged due to insufficient lubrication. At this time, the entire bearing usually needs to be replaced, which will undoubtedly greatly increase the maintenance cost. Summary of the invention

[0005] In view of this, the present invention provides a self-lubricating steering gear bearing, which can overcome the disadvantages of the existing steering gear bearing that it needs to be regularly disassembled and the internal grease replaced during use, which is troublesome to operate.

[0006] The technical scheme of the present invention is: a self-lubricating steering gear bearing, comprising a bearing, a partition, a fixing 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 fixing seat on a steering gear body, the partition is connected to the bearing retaining frame at circumferential intervals, and the partition is located between two adjacent balls, the fixing frame is connected to the fixing seat, two connecting rings are connected to the fixing frame, and the two connecting rings are distributed inside and outside, the first sealing ring is connected to the bottom of the connecting ring, and the two first sealing rings are respectively in contact with the top of the outer ring and the top of the inner ring of the bearing, the connecting pipe is connected to the fixing seat, and the end of the connecting pipe is connected to the outer connecting ring and maintained in communication, the electric push rod is installed on the inner wall of the fixing 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 the sliding frame is connected to the end of the connecting rod, the waste discharge assembly is used to discharge the sludge 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 technical solution of the present invention, the waste discharge assembly includes a collecting frame, a second sealing ring and a waste discharge pipe. The collecting frame is connected to the inner wall of the fixed seat, the two second sealing rings are connected to the top of the collecting frame, and 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 seat, and the end of the waste discharge pipe is connected to the collecting frame and maintained in communication.

[0008] As a preferred technical solution of the present invention, the feeding assembly includes a material storage frame, a feeding pipe, a drawing pump, a drawing pipe and a discharge pipe. The material storage frame is connected to a fixed seat, the feeding pipe is connected to the top of the material storage frame, the drawing pump is installed on the side of the material storage frame, the two ends of the drawing pipe are respectively connected to the feed port of the drawing pump and the top of the material storage frame, and the two ends of the discharge pipe are respectively connected to the discharge port of the drawing pump and the end of the connecting pipe.

[0009] As a preferred technical solution of the present invention, it also 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 spaced and slidingly connected to the annular plate, and the sliding tube is circumferentially spaced with through holes. The two ends of the connecting spring are respectively connected to the annular plate and the sliding tube.

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

[0011] As a preferred technical solution of the present invention, it also includes a first one-way valve, a second one-way valve and a third one-way valve. The first one-way valve is installed on the waste discharge pipe, the second one-way valve is installed on the feeding pipe, and the third one-way valve is installed on the discharge pipe.

[0012] As a preferred technical solution of the present invention, it also includes a fixed sleeve, a conical frame, a sealing sleeve and an oil seal spring. The fixed sleeve is connected to the shaft body, 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 is wrapped around the outside of the fixed sleeve, and the oil seal spring is wound around the outside of the sealing sleeve at intervals.

[0013] As a preferred technical solution of the present invention, a protective sleeve is also included. The protective sleeve is connected to the outside of the sealing sleeve at intervals, 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 through the cooperation of the partition, the connecting ring, the sliding frame, the feeding assembly and the waste discharge assembly, and can effectively remove the sludge inside the bearing while replacing the grease, thereby eliminating the need to regularly disassemble the steering gear bearing. 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. The present invention can effectively prevent external moisture and other pollutants from entering the interior of the bearing by designing a sealing sleeve and an oil seal spring, and avoid external pollutants from contaminating the internal grease of the bearing, thereby ensuring the normal operation and performance of the bearing, extending the service life of the bearing, and ensuring the safety and reliability of the steering system. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a schematic diagram of the installation and decomposition structure of the bearing of the present invention.

[0018] Figure 3 It is a cross-sectional view of the fixing seat on the steering gear body.

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

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

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

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

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

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

[0025] The markings in the figure are: 1-steering gear body, 2-fixed seat, 3-bearing, 301-outer ring, 302-inner ring, 303-cage, 304-ball, 4-axis body, 5-partition, 6-fixed frame, 7-connecting ring, 8-first sealing ring, 9-connecting pipe, 10-electric push rod, 11-connecting rod, 12-sliding frame, 13-collecting 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 tube, 2001-through hole, 21-connecting spring, 22-guide rod, 23-sliding plate, 24-reset spring, 25-first one-way valve, 26-second one-way valve, 27-third one-way valve, 28-fixing sleeve, 29-conical frame, 30-sealing sleeve, 31-oil seal spring, 32-protective sleeve. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to 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] Embodiment: A fixing seat 2 is installed on the top of the steering gear body 1. The fixing seat 2 is in the shape of a round tube. The shaft 4 is installed inside the fixing seat 2 through the bearing 3. A self-lubricating steering gear bearing, such as Figure 1-Figure 5 As shown, it 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 retainer 303 and a ball 304. The inner wall of the fixing seat 2 is connected to the outer ring 301, the inner side of the outer ring 301 is provided with an inner ring 302, a retainer 303 is provided between the inner ring 302 and the outer ring 301, and the retainer 303 is connected to a plurality of balls 304 at intervals in a circumferential direction, and the balls 304 are all connected to the outer ring 301. The inner wall of the ring 301 contacts the outer wall of the inner ring 302. Under the action of the ball 304, the inner ring 302 can rotate freely in the outer ring 301. The bearing 3 is a prior art and will not be described in detail here. The inner and outer sides of the retaining frame 303 are circumferentially connected with multiple partitions 5, and the partitions 5 do not contact the outer ring 301 and the inner ring 302, so as not to affect the free rotation of the inner ring 302. Each partition 5 is located between two adjacent balls 304. The rear side of the inner wall of the fixed seat 2 is connected to a fixing frame 6, and the fixing frame 6 is located above the bearing 3. , two connecting rings 7 are connected to the lower end of the fixing frame 6, and the two connecting rings 7 are distributed inside and outside, and a cavity for storing grease is formed between the two connecting rings 7. The bottom of the cavity is connected to the top of the retaining frame 303. The bottoms of the two connecting rings 7 are connected to the first sealing rings 8, and the bottoms of the two first sealing rings 8 are respectively in contact with the top of the outer ring 301 and the top of the inner ring 302 of the bearing 3. The first sealing ring 8 is used to block the gap between the connecting ring 7 and the outer ring 301 and the inner ring 302, and plays a sealing role to prevent the grease in the cavity from Overflow, a connecting pipe 9 is connected to the upper left side of the fixed seat 2, one end of the connecting pipe 9 is connected to the left side of the outer connecting ring 7 and keeps in communication, an electric push rod 10 is connected to the left side of the inner wall of the fixed seat 2, and a connecting rod 11 is connected to the telescopic rod of the electric push rod 10, a sliding frame 12 is connected between the two connecting rings 7, and the sliding frame 12 is fixedly connected to the end of the connecting rod 11, and 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 collecting frame 13, a second sealing ring 1301, a waste discharge pipe 14 and a first one-way valve 25. The inner wall of the fixed seat 2 is connected to the collecting frame 13, and the collecting frame 13 is located below the bearing 3. The top of the collecting frame 13 is an open design, and the top of the collecting frame 13 is connected to the bottom of the retaining frame 303. Two second sealing rings 1301 are connected to the top of the collecting frame 13, and the two second sealing rings 1301 are respectively in contact with the bottom of the outer ring 301 and the bottom of the inner ring 302 of the bearing 3. The second sealing ring 1301 is used to block the gap between the collecting frame 13 and the outer ring 301 and the inner ring 302, and plays a sealing role to prevent sludge from overflowing. The waste discharge pipe 14 is connected to the lower left side of the fixed seat 2, and one end of the waste discharge pipe 14 is connected to the left side of the collecting frame 13 and maintained in communication, and 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 suction pump 16, a suction pipe 17, a discharge pipe 18, a second one-way valve 26 and a third one-way valve 27. The storage frame 15 is connected to the rear side of the outer wall of the fixed seat 2, and the feeding pipe 1501 is connected to the rear side of the top of the storage frame 15. Grease can be added to the storage frame 15 manually through the feeding pipe 1501. A dust cover is threadedly connected to the top of the feeding pipe 1501, and the dust cover is used to prevent external dust from entering the storage frame 15. The second one-way valve 26 is installed on the feeding pipe 1501. A suction pump 16 is installed on the left side of the storage frame 15. A suction pipe 17 is connected between the feed port of the suction pump 16 and the top of the storage frame 15. The discharge pipe 18 is connected between the discharge port of the suction pump 16 and the other end of the connecting pipe 9, and the discharge pipe 18 is installed with a third one-way valve 27.

[0033] Initially, a proper amount of grease can be manually injected into the storage frame 15 through the feeding pipe 1501, and the second one-way valve 26 can prevent 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 extraction pump 16 can be started first, and the extraction pump 16 can extract the grease in the storage frame 15 through the extraction pipe 17. At the same time, the extraction pump 16 can transport 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 the grease in the connecting pipe 9 can all enter the cavity between the two connecting rings 7, and then the extraction pump 16 is closed after the cavity is filled with grease, and then the electric push rod 10 is controlled to drive the connecting rod 11 and the sliding frame 12 to move downward, and 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, the grease in the cavity can all be transported downward. The grease is then pushed down and the grease on the retainer 303 and the balls 304 is squeezed downwards by the grease so that the grease falls into the collecting frame 13 and is discharged downwards through the waste pipe 14. The first one-way valve 25 can prevent foreign matter from entering the collecting 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, thereby ensuring the cleanliness of the inside of the connecting pipe 9. Finally, the electric push rod 10 is controlled to drive the connecting rod 11 and the sliding frame 12 to move upwards and reset, so that the sliding frame 12 can leave the inside of the cavity and the outer wall of the sliding frame 12 no longer blocks the end of the connecting pipe 9, so that the connecting pipe 9 can deliver new grease to the cavity next time. In this way, the replacement of the grease inside the bearing 3 can be automatically completed, the operation is simple, and the service life of the bearing 3 can be extended.

[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 lower side of the interior of the above-mentioned cavity is connected to the annular plate 19, and the upper side of the interior of the collecting frame 13 is also connected to the annular plate 19. The number of the annular plates 19 is two, and multiple sliding tubes 20 are connected to the two annular plates 19 at circumferential intervals. The upper end of the sliding tube 20 is an open design, and the lower end of the sliding tube 20 is a closed design, and the lower end of the sliding tube 20 is in contact with the bottom of the annular plate 19. The sliding tube 20 is circumferentially spaced with through holes 2001. The connecting spring 21 is wound around the outside of the sliding tube 20, and the two ends of the connecting spring 21 are respectively connected to the annular 7-shaped plate and the sliding tube 20.

[0035] Initially, the two annular plates 19 are respectively located on the upper and lower sides of the bearing 3, so that the bottom of the cavity and the top of the collecting frame 13 are not connected to the retaining frame 303; when the sliding frame 12 moves downward to squeeze the grease in the cavity, the grease in the cavity will push the upper sliding tube 20 downward, and the upper connecting spring 21 is compressed, so that the lower end of the upper through hole 2001 protrudes out of the bottom of the upper annular plate 19. At this time, the bottom of the cavity is connected to the retaining frame 303 through the upper through hole 2001, and the grease in the cavity enters the retaining frame 303 through the upper through hole 2001. The upper annular plate 19 blocks the upward movement of the sludge, ensuring that the sludge can only move downward; similarly, the downward movement of the sludge in the retaining frame 303 will squeeze the lower sliding tube 20 to move downward, and the lower connecting spring 21 will compress the lower connecting spring 21. 21 is compressed so that the lower end of the lower through hole 2001 can protrude from the bottom of the lower annular plate 19. At this time, the top of the collecting frame 13 is connected with the retaining frame 303 through the lower through hole 2001. The sludge in the retaining frame 303 can fall into the collecting frame 13 through the lower through hole 2001, and the lower annular plate 19 is always blocked between the top of the collecting frame 13 and the bottom of the retaining frame 303 to prevent the new grease in the retaining frame 303 from mixing with the sludge in the collecting frame 13. When the sliding frame 12 moves upward and resets, the grease and sludge are not compressed, and the connecting spring 21 will return to its original state, driving the sliding tube 20 to move upward and 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 collecting frame 13 are returned to a disconnected state with the retaining frame 303.

[0036] like Figure 8 As shown, it also includes a guide rod 22, a sliding plate 23 and a return spring 24. The left and right sides of the storage frame 15 are connected with guide rods 22, and a sliding plate 23 is slidably connected between the two guide rods 22. The shape of the sliding plate 23 is adapted to the cross-sectional shape of the storage frame 15, and the outer wall of the sliding plate 23 is in contact with the inner wall of the storage frame 15. The outer sides of the two guide rods 22 are wound with a return spring 24, and the two ends of the return spring 24 are respectively connected to the bottom of the sliding plate 23 and the bottom of the storage frame 15, and the bottom of the storage frame 15 is provided with an air hole (not shown in the figure); when grease is manually injected into the storage frame 15, the grease will The sliding plate 23 is squeezed to move downward along the guide rod 22, the return spring 24 is compressed, and the air in the storage frame 15 is discharged outward through the air holes. When the extraction 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 and reset. The sliding plate 23 can push the grease in the storage frame 15 to move upward, ensuring 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 holes to ensure the stability of the air pressure in the storage frame 15.

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

[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art 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 fixed seat (2) on a steering gear body (1), and the bearing (3) being composed of an outer ring (301), an inner ring (302), a retainer (303) and a ball (304), characterized in that: The invention also comprises a partition plate (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 plate (5) is connected to the retaining frame (303) of the bearing (3) at intervals in the circumferential direction, and the partition plate (5) is located between two adjacent balls (304). The fixing frame (6) is connected to the fixing seat (2). The two connecting rings (7) are both 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 tube (9) is connected to the fixing seat (2), and the end of the connecting tube (9) is connected to the outer connecting ring (7) and maintained in communication. The electric push rod (10) is installed on the inner wall of the fixing 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 sliding frame (12) is connected to the end of the connecting rod (11). 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 tube (9).

2. A self-lubricating steering gear bearing according to claim 1, characterized in that: The waste discharge assembly comprises a collecting frame (13), a second sealing ring (1301) and a waste discharge pipe (14); the collecting frame (13) is connected to the inner wall of the fixing seat (2); the two second sealing rings (1301) are both connected to the top of the collecting frame (13); and the two second sealing rings (1301) are respectively in contact with the bottom of the outer ring (301) and the bottom of the inner ring (302) of the bearing (3); the waste discharge pipe (14) is connected to the fixing seat (2); and the end of the waste discharge pipe (14) is connected to the collecting frame (13) and maintained in communication.

3. A self-lubricating steering gear bearing as claimed in claim 2, characterized in that: The material feeding assembly comprises a material storage frame (15), a feeding pipe (1501), a material extraction pump (16), a material extraction pipe (17) and a material discharge pipe (18); the material storage frame (15) is connected to a fixing seat (2); the feeding pipe (1501) is connected to the top of the material storage frame (15); the material extraction pump (16) is installed on the side of the material storage frame (15); two ends of the material extraction pipe (17) are respectively connected to a material feed port of the material extraction pump (16) and the top of the material storage frame (15); and two ends of the material discharge pipe (18) are respectively connected to a material discharge port of the material extraction pump (16) and the end of the connecting pipe (9).

4. A self-lubricating steering gear bearing as claimed in claim 3, characterized in that: It also includes an annular plate (19), a sliding tube (20) and a connecting spring (21), wherein the two annular plates (19) are respectively connected to the connecting ring (7) and the inner wall of the collecting frame (13), the sliding tube (20) is circumferentially spaced and slidably connected to the annular plate (19), and through holes (2001) are circumferentially spaced on the sliding tube (20), and the two ends of the connecting spring (21) are respectively connected to the annular plate (7) and the sliding tube (20).

5. A self-lubricating steering gear bearing as claimed in claim 4, characterized in that: The invention also comprises a guide rod (22), a sliding plate (23) and a return spring (24), wherein the guide rod (22) is symmetrically connected to the inside of the material storage frame (15), the sliding plate (23) is slidably connected to the guide rod (22), and the sliding plate (23) is in contact with the inner wall of the material storage frame (15), and the two ends of the return spring (24) are respectively connected to the sliding plate (23) and the material storage frame (15).

6. A self-lubricating steering gear bearing as claimed in claim 5, characterized in that: It also includes a first one-way valve (25), a second one-way valve (26) and a third one-way valve (27), wherein the first one-way valve (25) is installed on the waste discharge pipe (14), the second one-way valve (26) is installed on the feeding pipe (1501), and the third one-way valve (27) is installed on the discharge pipe (18).

7. A self-lubricating steering gear bearing as claimed in claim 6, characterized in that: The invention also comprises a fixing sleeve (28), a conical frame (29), a sealing sleeve (30) and an oil seal spring (31), wherein the fixing sleeve (28) is connected to the shaft body (4), the conical frame (29) is connected to the top of the fixing 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 fixing sleeve (28), and the oil seal spring (31) is wound around the outside of the sealing sleeve (30) at intervals.

8. A self-lubricating steering gear bearing as claimed in claim 7, characterized in that: It also includes a protective sleeve (32), which is connected to the outside of the sealing sleeve (30) at intervals, and the oil seal spring (31) is located inside the protective sleeve (32).

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