Steering gear intermediate shaft assembly

Abstract

A kind of steering gear intermediate shaft assembly, including shaft body, the gear sleeve matched with its sleeve of shaft body and several gear being axially even arranged on the outer wall of gear sleeve, the left end surface of the shaft body is equipped with a limit slot in the center;The bottom of the limit slot is equipped with a square hole in the center;The square hole is equipped with the square shaft matched with it;The left end surface of the square shaft is equipped with an oil storage hole in the center;The left end hole of the oil storage hole is screwed with a plug;The limit slot is equipped with a limit structure matched with plug;The outer wall of the shaft body upper surface is equipped with several first oil guide holes corresponding with the position of gear;The gear outer circumferential surface has gear slot between adjacent gear teeth.The steering gear intermediate shaft assembly of the utility model can not only realize one-way oil throwing, but also can realize automatic locking, avoid lubricating oil being wasted, and at the same time, can effectively improve oiling efficiency.

Description

Technical Field

[0001] This utility model relates to a steering gear intermediate shaft assembly. Background Technology

[0002] As a core component of the transmission system, the intermediate shaft assembly adopts a self-lubricating method to avoid excessive friction when the gears mesh. However, traditional self-lubricating methods suffer from uncontrollable dynamic oil supply and low maintainability.

[0003] The self-lubricating device of the traditional intermediate shaft assembly can only achieve unidirectional oil throwing and cannot automatically lock the hole used for oil throwing, resulting in the waste of lubricating oil. In addition, the oil storage space of the traditional intermediate shaft assembly is directly set on the shaft body of the intermediate shaft assembly, which means that when lubricating oil needs to be added, the entire intermediate shaft assembly must be disassembled to add lubricating oil, which seriously affects the lubrication efficiency. Summary of the Invention

[0004] The present invention aims to solve the existing technical problem by providing a steering gear intermediate shaft assembly that can not only achieve unidirectional oil throwing but also automatically lock to avoid wasting lubricating oil, while effectively improving refueling efficiency.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: This utility model discloses a steering gear intermediate shaft assembly, including a shaft body, a matching gear sleeve fitted over the shaft body, and several gears axially and evenly arranged on the outer wall of the gear sleeve. A limiting groove is provided at the center of the left end face of the shaft body; a square hole is provided at the center of the bottom of the limiting groove; a matching square shaft is provided inside the square hole; an oil reservoir is provided at the center of the left end face of the square shaft; a plug is screwed to the left end opening of the oil reservoir; a limiting structure matching the plug is provided inside the limiting groove; several first oil guide holes corresponding to the positions of the gears are provided on the upper surface of the outer wall of the shaft body; tooth grooves are formed between adjacent teeth on the outer circumference of the gears; a second oil guide hole communicating with the first oil guide hole is provided at the bottom of the tooth groove; several self-closing holes communicating with the first oil guide holes are provided on the inner wall of the oil reservoir; a self-closing structure matching the self-closing hole is provided inside the self-closing hole.

[0006] The self-closing structure includes a self-closing seat screwed into a self-closing hole; a one-way hole is provided at the center of the lower surface of the self-closing seat; a hexagonal disassembly hole is provided at the center of the upper surface of the self-closing seat; a screw hole communicating with the disassembly hole is provided at the center of the bottom of the one-way hole; a matching oil passage block is screwed into the screw hole; the oil passage block has several oil passage holes, and the one-way hole communicates with the disassembly hole through the several oil passage holes; a guide rod is provided at the center of the lower surface of the oil passage block; a closing plate is screwed into the lower end opening of the one-way hole; a closing hole is provided at the center of the closing plate; a closing ball is provided in the one-way hole, and the closing ball blocks and seals the upper end opening of the closing hole; a guide hole is provided at the center of the upper end face of the closing ball; the lower end of the guide rod passes downward into the guide hole, and there is a moving gap between the lower end face of the guide rod and the bottom of the guide hole; a spring is provided between the closing ball and the bottom of the one-way hole, outside the guide rod.

[0007] The lower surface of the opening and closing plate is provided with several circumferentially evenly distributed card holes.

[0008] The limiting structure includes an annular groove on the inner wall of the limiting groove; the outer wall of the left end of the plug has a sealing part that fits against the left end face of the square shaft; a first retaining spring that matches it is provided in the annular groove, the inner edge of the first retaining spring protruding inward to the outside of the annular groove and fitting against the left side wall of the sealing part; the right end face of the square shaft fits against the bottom of the square hole; and a pulling head is provided at the center of the left end face of the plug.

[0009] The right side wall of the sealing part is provided with an annular auxiliary groove; an O-ring that matches it is provided in the auxiliary groove.

[0010] The inner wall of the gear sleeve is provided with several keyways evenly distributed in a circle; the outer wall of the shaft is provided with several limiting keys that match the keyways; the right outer wall of the shaft is provided with an annular limiting step, and the right end face of the gear sleeve is in contact with the limiting step; the left side of the shaft is fitted with a sealing plate that is in contact with the left end face of the gear sleeve, and the center of the sealing plate is provided with a sealing hole that matches the shaft; the inner wall of the sealing hole and the right side wall of the sealing plate are both provided with an annular sealing groove; a sealing ring that matches it is provided in the sealing groove; the left outer wall of the shaft is provided with an annular retaining groove; a second retaining spring that matches it is provided in the retaining groove, and the outer edge of the second retaining spring protrudes outward to the outside of the retaining groove and is in contact with the left side wall of the sealing plate.

[0011] The beneficial effects of this utility model are: Compared with the prior art, the steering gear intermediate shaft assembly with the structure of this utility model can automatically stop oil delivery after the shaft stops rotating through a self-closing structure, achieving a self-closing effect and effectively avoiding the situation where the oil delivery position is always open, resulting in wasted lubricating oil. At the same time, the oil storage hole, which serves as the oil storage space, is directly set on the square shaft. When lubricating oil needs to be replenished, the square shaft can be pulled out from the square hole in the shaft body to replenish the lubricating oil without having to disassemble the entire intermediate shaft assembly, saving a lot of time and effectively ensuring refueling efficiency. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the steering gear intermediate shaft assembly of this utility model; Figure 2 yes Figure 1 An enlarged view of part A; Figure 3 yes Figure 1 An enlarged view of part B. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Please see Figures 1 to 3 This utility model provides a steering gear intermediate shaft assembly, including a shaft body 1, a matching gear sleeve 2 fitted over the shaft body 1, and several gears 3 axially and evenly arranged on the outer wall of the gear sleeve 2. A limiting groove 4 is provided at the center of the left end face of the shaft body 1; a square hole 5 is provided at the center of the bottom of the limiting groove 4; a matching square shaft 6 is provided inside the square hole 5; an oil storage hole 7 is provided at the center of the left end face of the square shaft 6; a plug 8 is screwed to the left end opening of the oil storage hole 7; a limiting structure matching the plug is provided inside the limiting groove 4; several first oil guide holes 9 corresponding to the positions of the gears 3 are provided on the upper surface of the outer wall of the shaft body 1; a tooth groove 302 is provided between adjacent teeth 301 on the outer circumference of the gears 3; a second oil guide hole 10 communicating with the first oil guide hole 9 is provided at the bottom of the tooth groove 302; several self-closing holes 11 communicating with the first oil guide holes 9 are provided on the inner wall of the oil storage hole 7; a self-closing structure matching the self-closing hole 11 is provided inside the self-closing hole 11.

[0014] The self-closing structure includes a self-closing seat 12 screwed into the self-closing hole 11; a one-way hole 13 is provided at the center of the lower surface of the self-closing seat 12; a hexagonal disassembly hole 14 is provided at the center of the upper surface of the self-closing seat 12; a screw hole 15 communicating with the disassembly hole 14 is provided at the center of the bottom of the one-way hole 13; a matching oil passage block 16 is screwed into the screw hole 15; the oil passage block 16 is provided with a plurality of oil passage holes 17, and the one-way hole 13 communicates with the disassembly hole 14 through the plurality of oil passage holes 17; a guide rod is provided at the center of the lower surface of the oil passage block 16. 18; A closing plate 19 is screwed into the lower end of the one-way hole 13; The closing plate 19 has a closing hole 20 at its center; A closing ball 21 is provided in the one-way hole 13, which blocks and seals the upper end of the closing hole 20; A guide hole 22 is provided at the center of the upper end face of the closing ball 21; The lower end of the guide rod 18 is inserted downward into the guide hole 22, and there is a moving distance 23 between the lower end face of the guide rod 18 and the bottom of the guide hole 22; A spring 24 is provided between the closing ball 21 and the bottom of the one-way hole 13, which is fitted outside the guide rod 18.

[0015] The lower surface of the opening and closing plate 19 is provided with a number of evenly distributed circumferential holes 25.

[0016] The limiting structure includes an annular groove 26 on the inner wall of the limiting groove 4; a sealing part 27 is provided on the outer wall of the left end of the plug 8, which fits against the left end face of the square shaft 6; a first retaining spring 28 is provided in the annular groove 26, and the inner edge of the first retaining spring 28 protrudes inward to the outside of the annular groove 26 and fits against the left side wall of the sealing part 27; the right end face of the square shaft 6 fits against the bottom of the square hole 5; and a pulling head 29 is provided at the center of the left end face of the plug 8.

[0017] The right side wall of the sealing part 27 is provided with an annular auxiliary groove 30; an O-ring 31 matching it is provided in the auxiliary groove 30.

[0018] The inner wall of the gear sleeve 2 is provided with several keyways 32 evenly distributed in a circle; the outer wall of the shaft body 1 is provided with several limiting keys 33 that match the keyways 32; the right outer wall of the shaft body 1 is provided with an annular limiting step 34, and the right end face of the gear sleeve 2 is in contact with the limiting step 34; the left side of the shaft body 1 is covered with a sealing plate 35 that is in contact with the left end face of the gear sleeve 2, and the center of the sealing plate 35 is provided with a sealing hole 36 that matches the shaft body 1; the inner wall of the sealing hole 36 and the right side wall of the sealing plate 35 are both provided with an annular sealing groove 37; the sealing groove 37 is provided with a matching sealing ring 38; the left outer wall of the shaft body 1 is provided with an annular locking groove 39; the locking groove 39 is provided with a matching second retaining spring 40, and the outer edge of the second retaining spring 40 protrudes outward to the outside of the locking groove 39 and is in contact with the left side wall of the sealing plate 35.

[0019] The method of using this utility model is as follows: The oil reservoir 7 can be used to store lubricating oil or grease. The presence of the plug 8 ensures that the oil reservoir 7 forms a sealed space, preventing oil leakage. When the intermediate shaft assembly is running, the shaft body 1 rotates, generating centrifugal force. This centrifugal force acts on the opening and closing ball 21, causing it to swing outward and move away from the opening and closing hole 20. At this time, the opening and closing hole 20 opens, and the lubricating oil in the oil reservoir 7 enters the first guide hole 9 through the opening and closing hole 20, the one-way hole 13, the oil passage hole 17, and the disassembly hole 14 under the action of centrifugal force. Then, it enters the gear groove 302 through the second guide hole 10. As the gear 3 continuously meshes, the lubricating oil eventually fills the gear teeth 301 of the gear 3, achieving automatic lubrication. When the intermediate shaft assembly stops running, the shaft body 1 no longer rotates, and the centrifugal force is lost. The spring 24 uses its own elasticity to reset the opening and closing ball, blocking and sealing the opening and closing hole 20 again to prevent oil leakage.

[0020] If the lubricating oil or grease in the oil reservoir 7 needs to be replenished, simply remove the first retaining ring 28 from the annular groove 26, and then pull the square shaft 6 directly out of the square hole 5 through the pulling head 29. Then unscrew the plug 8, and lubricating oil or grease can be added into the oil reservoir 7 through the opening of the oil reservoir 7. After the oiling is completed, simply put the square shaft 6 back into the square hole 5, and then fix it by limiting it with the first retaining ring 28.

[0021] In summary, this utility model can automatically stop oil discharge after the shaft body 1 stops rotating through a self-closing structure, achieving a self-closing effect and effectively avoiding the situation where the oil outlet position is always open, resulting in the waste of lubricating oil. At the same time, the oil storage hole 7, which serves as the oil storage space, is directly set on the square shaft 6. When lubricating oil needs to be replenished, the square shaft 6 can be pulled out from the square hole 5 of the shaft body 1 to replenish the lubricating oil without having to disassemble the entire intermediate shaft assembly, saving a lot of time and effectively ensuring the efficiency of oiling.

[0022] There is a moving distance 23 between the lower end face of the guide rod 18 and the bottom of the guide hole 22. The existence of the moving distance 23 can effectively limit the displacement of the opening and closing ball 21 after being affected by centrifugal force, and prevent the opening and closing ball 21 from being thrown out too much, which would cause the spring 24 to be tightly compressed, so that the lubricating oil in the one-way hole 13 cannot flow to the oil passage hole 17 through the gap of the spring 24 itself.

[0023] The lower surface of the opening and closing plate 19 is provided with several evenly distributed circumferential locking holes 25. The presence of the locking holes 25 facilitates the use of disassembly tools. By rotating the opening and closing plate 19 with the disassembly tools, it is easy to disassemble and assemble the opening and closing plate 19.

[0024] The right side wall of the sealing part 27 is provided with an annular auxiliary groove 30, and an O-ring 31 that matches it is provided in the auxiliary groove 30. The presence of the O-ring 31 can effectively ensure the sealing between the right side wall of the sealing part 27 and the left end face of the square shaft 6, and further prevent oil leakage.

[0025] The inner wall of the gear sleeve 2 is provided with several keyways 32 evenly distributed in a circle, and the outer wall of the shaft body 1 is provided with several limiting keys 33 that match the keyways 32. The outer wall of the right side of the shaft body 1 is provided with an annular limiting step 34. The right end face of the gear sleeve 2 fits against the limiting step 34. The left side of the shaft body 1 is covered with a sealing plate 35 that fits against the left end face of the gear sleeve 2. The outer edge of the second snap ring 40 protrudes outward to the outside of the snap groove 39 and fits against the left side wall of the sealing plate 35. This fixing method facilitates the disassembly and assembly between the shaft body 1 and the gear 3, and the sealing of the left end of the gear sleeve 2 can be ensured by the sealing plate 35.

[0026] The sealing plate 35 has a sealing hole 36 at its center that matches the shaft body. The inner wall of the sealing hole 36 and the right side wall of the sealing plate 35 are both provided with an annular sealing groove 37. The sealing groove 37 is provided with a matching sealing ring 38. The presence of the sealing ring 38 can further ensure the sealing between the inner wall of the sealing hole 36 and the outer wall of the shaft body 1, and between the right side wall of the sealing plate 35 and the left end face of the gear sleeve 2, and further prevent oil leakage.

Claims

1. A steering gear intermediate shaft assembly, comprising a shaft body, a gear sleeve fitted over the shaft body to match it, and a plurality of gears axially and evenly disposed on the outer wall of the gear sleeve, characterized in that: A limiting groove is provided at the center of the left end face of the shaft; a square hole is provided at the center of the bottom of the limiting groove; a matching square shaft is provided in the square hole; an oil storage hole is provided at the center of the left end face of the square shaft; a plug is screwed to the left end opening of the oil storage hole; a limiting structure matching the plug is provided in the limiting groove; a plurality of first oil guide holes corresponding to the gear positions are provided on the upper surface of the outer wall of the shaft; a tooth groove is provided between adjacent teeth on the outer circumference of the gear; a second oil guide hole communicating with the first oil guide hole is provided at the bottom of the tooth groove; a plurality of self-closing holes communicating with the first oil guide holes are provided on the inner wall of the oil storage hole; a matching self-closing structure is provided in the self-closing hole.

2. The steering gear intermediate shaft assembly according to claim 1, characterized in that: The self-closing structure includes a self-closing seat screwed into a self-closing hole; a one-way hole is provided at the center of the lower surface of the self-closing seat; a hexagonal disassembly hole is provided at the center of the upper surface of the self-closing seat; a screw hole communicating with the disassembly hole is provided at the center of the bottom of the one-way hole; a matching oil passage block is screwed into the screw hole; the oil passage block has several oil passage holes, and the one-way hole communicates with the disassembly hole through the several oil passage holes; a guide rod is provided at the center of the lower surface of the oil passage block; a closing plate is screwed into the lower end opening of the one-way hole; a closing hole is provided at the center of the closing plate; a closing ball is provided in the one-way hole, and the closing ball blocks and seals the upper end opening of the closing hole; a guide hole is provided at the center of the upper end face of the closing ball; the lower end of the guide rod passes downward into the guide hole, and there is a moving gap between the lower end face of the guide rod and the bottom of the guide hole; a spring is provided between the closing ball and the bottom of the one-way hole, outside the guide rod.

3. A steering gear intermediate shaft assembly according to claim 2, characterized in that: The lower surface of the opening and closing plate is provided with several circumferentially evenly distributed card holes.

4. A steering gear intermediate shaft assembly according to claim 1, characterized in that: The limiting structure includes an annular groove on the inner wall of the limiting groove; the outer wall of the left end of the plug has a sealing part that fits against the left end face of the square shaft; a first retaining spring that matches it is provided in the annular groove, the inner edge of the first retaining spring protruding inward to the outside of the annular groove and fitting against the left side wall of the sealing part; the right end face of the square shaft fits against the bottom of the square hole; and a pulling head is provided at the center of the left end face of the plug.

5. A steering gear intermediate shaft assembly according to claim 4, characterized in that: The right side wall of the sealing part is provided with an annular auxiliary groove; an O-ring that matches it is provided in the auxiliary groove.

6. A steering gear intermediate shaft assembly according to claim 1, characterized in that: The inner wall of the gear sleeve is provided with several keyways evenly distributed in a circle; the outer wall of the shaft is provided with several limiting keys that match the keyways; the right outer wall of the shaft is provided with an annular limiting step, and the right end face of the gear sleeve is in contact with the limiting step; the left side of the shaft is fitted with a sealing plate that is in contact with the left end face of the gear sleeve, and the center of the sealing plate is provided with a sealing hole that matches the shaft; the inner wall of the sealing hole and the right side wall of the sealing plate are both provided with an annular sealing groove; a sealing ring that matches it is provided in the sealing groove; the left outer wall of the shaft is provided with an annular retaining groove; a second retaining spring that matches it is provided in the retaining groove, and the outer edge of the second retaining spring protrudes outward to the outside of the retaining groove and is in contact with the left side wall of the sealing plate.

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