Grease storage structure of steering gear guide block

Abstract

A steering gear guide block grease storage structure comprises a guide block body, an arc concave face arranged above the guide block body and a guide sliding groove formed in the bottom of the arc concave face, and a plurality of grease storage grooves from front to back are formed in the arc concave face. The middle part of the grease storage groove is communicated with the guide chute; a grease storage hole is formed in the center of the lower surface of the guide block body; an oil outlet hole communicated with the grease storage hole is formed in the center of the bottom of the guide sliding groove. The oil outlet hole is coaxial with the grease storage hole, and the diameter of the oil outlet hole is smaller than that of the grease storage hole; a positioning structure is arranged in the lower part of the grease storage hole; a ball is arranged in the upper part of the grease storage hole; the diameter of the ball is smaller than that of the grease storage hole and larger than that of the grease outlet hole. According to the grease storage structure for the steering gear guide block, long-acting lubrication of the guide block can be achieved, the situation that noise is generated due to time lapse is avoided, and the stability of the steering gear during operation is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of steering gears, in particular to a grease storage structure of a guide block of a steering gear. Background Art

[0002] The steering gear is a key component in the automobile steering system. It drives the tires to steer by transmitting force from the steering wheel to the steering transmission mechanism and changing the direction of force transmission. When a mechanical rack and pinion steering gear needs to steer, just turn the steering wheel. The steering wheel will drive the gear to rotate synchronously through the steering shaft. The gear is meshed with the rack, and the rack is connected to the tie rod. Therefore, when the gear is meshed with the rack, the rack moves left and right, and drives the tie rod to move, thereby achieving steering of the tires.

[0003] There is a shell fixed outside the steering gear rack. In order to ensure the stability of the rack when it moves left and right, a guide block matching the rack is set in the shell, and the concave surface of the guide block fits with the back of the rack. At the same time, a guide groove is provided at the bottom of the concave surface, and a guide slider matching the guide groove is provided on the back of the rack to ensure the guiding effect of the guide block to the greatest extent. In order for the steering gear to operate smoothly, mutual lubrication between its components is essential. Mechanical gear rack steering gears often use long-lasting anti-wear lithium-based grease. However, in the actual lubrication process, as the steering gear rack and the guide block engage and slide friction, the lithium-based grease adheres to the surface of the parts after the back of the rack contacts the concave surface of the guide block, and the lubricity of the oil film decreases as the amount of lithium-based grease decreases, which will cause abnormal noise and other adverse phenomena. Moreover, after the back of the steering gear rack engages and slides with the arc concave surface of the guide block, since the arc concave surface of the guide block is a smooth surface, very little lithium-based grease remains on the surface, which cannot provide long-term lubrication, and noise and other adverse phenomena will occur over time. Summary of the Invention

[0004] The utility model aims to solve the existing technical problem by providing a steering gear guide block grease storage structure, which can achieve long-term lubrication of the guide block, avoid the situation where noise is generated over time, and effectively ensure the stability of the steering gear during operation.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] The utility model discloses a steering gear guide block grease storage structure, comprising a guide block body, an arc concave surface arranged above the guide block body and a guide slot arranged at the bottom of the arc concave surface, wherein the arc concave surface is provided with a plurality of grease storage grooves from front to back; the middle of the grease storage groove is connected with the guide slot; a grease storage hole is provided at the center of the lower surface of the guide block body; an oil outlet hole is provided at the center of the bottom of the guide slot that is connected with the grease storage hole; the oil outlet hole is coaxial with the grease storage hole, and the diameter of the oil outlet hole is smaller than the grease storage hole; a positioning structure is provided in the lower part of the grease storage hole; a ball is provided in the upper part of the grease storage hole; the diameter of the ball is smaller than the diameter of the grease storage hole, and the diameter of the ball is larger than the diameter of the oil outlet hole; the positioning structure pushes the upper end of the ball into the oil outlet hole, and the upper end surface of the ball is coplanar with the bottom of the guide slot; the ball can roll when subjected to external force; the edge of the orifice of the lower end of the oil outlet hole is provided with a plurality of notches evenly distributed around the circumference.

[0007] The positioning structure includes a positioning seat screwed into the lower part of the grease storage hole; the upper surface of the positioning seat is in contact with the lower end surface of the ball; an oil pressure hole is provided in the center of the lower surface of the positioning seat; a plurality of evenly distributed oil holes are provided on the upper surface of the positioning seat; a fixing seat is screwed into the lower part of the oil pressure hole.

[0008] An oil pressure plate is provided in the middle of the oil pressure hole, and the oil pressure plate can move up and down along the track of the inner wall of the oil pressure hole; a guide column is provided in the center of the upper surface of the fixed seat; a guide hole is provided in the center of the upper end surface of the guide column; a guide rod matching the guide hole is provided in the center of the lower surface of the oil pressure plate; a spring is provided outside the guide column between the lower surface of the oil pressure plate and the upper surface of the fixed seat.

[0009] An annular sealing groove is provided on the outer peripheral surface of the oil pressure plate; a sealing ring matching the sealing groove is provided in the sealing groove.

[0010] An upper screw hole is provided at the center of the lower surface of the oil pressure plate, and the upper end of the guide rod is screwed into the upper screw hole; a lower screw hole is provided at the center of the upper surface of the fixing seat, and the lower end of the guide column is screwed into the lower screw hole.

[0011] A disassembly hole is provided at the center of the lower surface of the fixing seat, and the disassembly hole is in a regular hexagonal shape.

[0012] The outer wall of the ball is provided with a plurality of evenly distributed arc-shaped grooves.

[0013] An annular positioning groove is provided on the inner wall of the lower end opening of the grease storage hole; and a positioning portion matching the positioning groove is provided on the outer wall of the lower end of the positioning seat.

[0014] The lower end opening of the oil pressure hole is in the shape of a regular hexagon.

[0015] The beneficial effects of the utility model are:

[0016] Compared with the prior art, the steering gear guide block grease storage structure adopting the structure of the utility model can store grease through the grease storage groove on the guide block body, so that when the back of the rack slides and rubs along the arc concave surface of the guide block body, the grease in the grease storage groove automatically penetrates between the back of the rack and the arc concave surface, thereby achieving a lubrication effect. The storage amount of grease in the grease storage groove can achieve a long-term lubrication effect, and the grease stored in the internal space of the oil pressure hole, the upper surface of the positioning seat and the upper inner wall of the grease storage hole can further increase the storage amount of grease, thereby further extending the lubrication time, ensuring the long-term lubrication effect to the greatest extent, and effectively avoiding the grease initially applied to the back of the rack and the arc concave surface from being quickly consumed, resulting in severe friction and noise, thereby effectively ensuring the stability of the steering gear during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the grease storage structure of the steering guide block of the utility model;

[0018] Figure 2 This is a cross-sectional view of the grease storage structure of the steering guide block of the utility model;

[0019] Figure 3 yes Figure 2 Magnified view of part A. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] See also Figures 1 to 3 The utility model provides a steering gear guide block grease storage structure, comprising a guide block body 1, an arc concave surface 2 provided above the guide block body 1, and a guide chute 3 provided at the bottom of the arc concave surface 2, wherein the arc concave surface 2 is provided with a plurality of grease storage grooves 4 from front to back; the middle of the grease storage groove 4 is connected with the guide chute 3; a grease storage hole 5 is provided at the center of the lower surface of the guide block body 1; an oil outlet hole 6 is provided at the center of the bottom of the guide chute 3 and is connected with the grease storage hole 5; the oil outlet hole 6 is connected with the grease storage hole 5 The grease hole 5 is coaxial, and the diameter of the oil outlet hole 6 is smaller than that of the grease storage hole 5; a positioning structure is provided in the lower part of the grease storage hole 5; a ball 7 is provided in the upper part of the grease storage hole 5; the diameter of the ball 7 is smaller than that of the grease storage hole 5, and the diameter of the ball 7 is larger than that of the oil outlet hole 6; the positioning structure pushes the upper end of the ball 7 into the oil outlet hole 6, and the upper end surface of the ball 7 is coplanar with the bottom of the guide groove 3; the ball 7 can roll when subjected to external force; a plurality of notches 25 evenly distributed around the circumference are provided on the edge of the lower end of the oil outlet hole 6.

[0022] The positioning structure includes a positioning seat 8 screwed into the lower part of the grease storage hole 5; the upper surface of the positioning seat 8 is in contact with the lower end surface of the ball 7; an oil pressure hole 9 is provided in the center of the lower surface of the positioning seat 8; a plurality of evenly distributed oil holes 10 are provided on the upper surface of the positioning seat 8; a fixing seat 11 is screwed into the lower part of the oil pressure hole 9.

[0023] The middle part of the oil pressure hole 9 is provided with an oil pressure plate 12, which can move up and down along the inner wall track of the oil pressure hole 9; a guide column 13 is provided at the center of the upper surface of the fixed seat 11; a guide hole 14 is provided at the center of the upper end surface of the guide column 13; a guide rod 15 matching the guide hole 14 is provided at the center of the lower surface of the oil pressure plate 12; a spring 16 is provided outside the guide column 13 between the lower surface of the oil pressure plate 12 and the upper surface of the fixed seat 11.

[0024] An annular sealing groove 17 is provided on the outer peripheral surface of the oil pressure plate 12 ; a matching sealing ring 18 is provided in the sealing groove 17 .

[0025] An upper screw hole 19 is provided at the center of the lower surface of the oil pressure plate 12, and the upper end of the guide rod 15 is screwed into the upper screw hole 19; a lower screw hole 20 is provided at the center of the upper surface of the fixing seat 11, and the lower end of the guide column 13 is screwed into the lower screw hole 20.

[0026] A disassembly hole 21 is provided at the center of the lower surface of the fixing seat 11 , and the disassembly hole 21 is in a regular hexagonal shape.

[0027] The outer wall of the ball 7 is provided with a plurality of evenly distributed arc-shaped grooves 22 .

[0028] An annular positioning groove 23 is provided on the inner wall of the lower end of the grease storage hole 5 ; a positioning portion 24 matching the positioning groove 23 is provided on the outer wall of the lower end of the positioning seat 8 .

[0029] The lower end opening of the oil pressure hole 9 is in the shape of a regular hexagon.

[0030] The method of using the utility model is as follows:

[0031] The grease storage groove 4 can be used to store grease. When the back side of the rack slides and rubs against the arc concave surface 2, the grease in the grease storage groove 4 will penetrate out of the grease storage groove 4 and be between the back side of the rack and the arc concave surface 2, playing a lubricating role. Therefore, there is no need to worry about the grease initially applied between the back side of the rack and the arc concave surface 2 being consumed as the back side of the rack slides and rubs against the arc concave surface 2.

[0032] At the same time, the internal space of the oil pressure hole 9, the space between the upper surface of the positioning seat 8 and the upper inner wall of the grease storage hole 5 are all filled with grease. Since the guide slide 3 matches the guide slider on the back of the rack, when the guide slider is in the guide slide 3, the upper end opening of the oil outlet hole 6 is directly blocked to form a blocking effect, and the upper end surface of the ball 7 is flush with the bottom of the guide slide 3. When the guide slider is in contact with the bottom of the guide slide 3, the guide slider on the back of the rack is in contact with the upper end surface of the ball 7. Therefore, when the rack moves along the trajectory of the guide slide 3 with the guide slider, the guide slider will pass through the gap between itself and the upper end surface of the ball 7 The friction between the two makes the ball 7 roll. When the ball 7 rolls, the ball 7 transfers the grease adhering to the surface to the guide slider. As the outer wall of the guide slider and the inner wall of the guide groove 3 continue to rub, the grease eventually not only covers the guide groove, but also penetrates into the arc concave surface 2, further improving the lubrication effect. The edge of the hole at the lower end of the oil outlet hole 6 is provided with a plurality of notches 25 evenly distributed around the circumference. The presence of the notch 25 is conducive to the transfer of the grease in the grease storage hole 5 to the oil outlet hole 6, so that the rolling ball 7 transfers the grease between the upper surface of the positioning seat 8 and the upper inner wall of the grease storage hole 5 to the oil outlet hole 6, effectively ensuring the lubrication effect.

[0033] From the above, it can be seen that the utility model can store grease through the grease storage groove 4 on the guide block body 1, so that when the back of the rack slides along the arc concave surface 2 of the guide block body 1, the grease in the grease storage groove 4 automatically penetrates between the back of the rack and the arc concave surface 2, thereby achieving a lubrication effect. The storage amount of grease in the grease storage groove 4 can achieve a long-term lubrication effect, and the grease stored in the internal space of the oil pressure hole 9, the upper surface of the positioning seat 8 and the upper inner wall of the grease storage hole 5 can further increase the storage amount of grease, thereby further extending the lubrication time, and ensuring the long-term lubrication effect to the greatest extent, effectively avoiding the grease initially applied to the back of the rack and the arc concave surface 2 from being quickly consumed, resulting in severe friction and noise, and effectively ensuring the stability of the steering gear during operation.

[0034] There is an oil pressure plate 12 in the middle of the oil pressure hole 9. The oil pressure plate 12 can move up and down along the inner wall track of the oil pressure hole 9. A guide column 13 is provided at the center of the upper surface of the fixed seat 11. A guide hole 14 is provided at the center of the upper end surface of the guide column 13. A guide rod 15 matching the guide hole 14 is provided at the center of the lower surface of the oil pressure plate 12. A set of springs 16 outside the guide column 13 is provided between the lower surface of the oil pressure plate 12 and the upper surface of the fixed seat 11. The space between the upper surface of the oil pressure plate 12 and the upper inner wall of the oil pressure hole 9 and the space between the upper surface of the positioning seat 8 and the upper inner wall of the grease storage hole 5 are filled with grease, and the upper end opening of the oil outlet hole 6 is shielded and sealed by the guide slider on the back of the rack. 9, so the grease in the space between the upper surface of the oil pressure plate 12 and the upper inner wall of the oil pressure hole 9 is squeezed into the space between the upper surface of the positioning seat 8 and the upper inner wall of the grease storage hole 5 through the oil through hole 10, thereby driving the grease into the oil outlet hole 6 through the rolling of the ball 7, and finally transferring it to the guide groove 3 to achieve the lubrication effect. Therefore, the existence of the spring 16 can play the role of active oil delivery, ensuring that there is enough grease for lubrication each time.

[0035] An annular sealing groove 17 is provided on the outer peripheral surface of the oil pressure plate 12, and a matching sealing ring 18 is provided in the sealing groove 17. The presence of the sealing ring 18 can effectively ensure the sealing between the outer peripheral surface of the oil pressure plate 12 and the inner wall of the oil pressure hole 9, avoiding the waste of grease caused by leakage.

[0036] An upper screw hole 19 is provided at the center of the lower surface of the oil pressure plate 12, and the upper end of the guide rod 15 is screwed into the upper screw hole 19. This fixing method facilitates the disassembly and assembly between the oil pressure plate 12 and the guide rod 15; a lower screw hole 20 is provided at the center of the upper surface of the fixing base 11, and the lower end of the guide column 13 is screwed into the lower screw hole 20. This fixing method facilitates the disassembly and assembly between the guide column 13 and the fixing base 11.

[0037] A disassembly hole 21 is provided in the center of the lower surface of the fixing base 11. The disassembly hole 21 is a regular hexagon. The fixing base 11 can be easily rotated by simply inserting an inner hexagonal wrench adapted to the disassembly hole 21 into the disassembly hole 21, thereby realizing quick disassembly and assembly of the fixing base 11.

[0038] The outer wall of the ball 7 is provided with a number of evenly distributed arc-shaped grooves 22. The presence of the arc-shaped grooves 22 can also serve the purpose of storing grease, effectively ensuring that when the ball 7 rolls under the friction of the guide slider on the back of the rack, sufficient grease can be transferred to the oil outlet 6, thereby ensuring that sufficient grease can penetrate into the guide groove 3.

[0039] A ring-shaped positioning groove 23 is provided on the inner wall of the lower end of the grease storage hole 5, and a positioning portion 24 matching the positioning groove 23 is provided on the outer wall of the lower end of the positioning seat 8. The presence of the positioning portion 24 can effectively limit the depth of the positioning seat into the grease storage hole 5, thereby realizing rapid positioning of the positioning seat 8.

[0040] The lower end opening of the oil pressure hole 9 is a regular hexagon. Simply insert an appropriate hexagonal wrench into the lower end opening of the oil pressure hole 9 to easily rotate the positioning seat 8, thereby achieving rapid disassembly and assembly of the positioning seat 8, thereby facilitating the replacement of the ball 7.

Claims

1. A steering gear guide block grease storage structure, comprising a guide block body, an arcuate concave surface provided above the guide block body, and a guide chute provided at the bottom of the arcuate concave surface, characterized in that: The arc concave surface is provided with a plurality of fat storage grooves from front to back; the middle part of the fat storage groove is connected with the guide groove; the center of the lower surface of the guide block body is provided with a fat storage hole; the center of the bottom of the guide groove is provided with an oil outlet hole connected with the fat storage hole; the oil outlet hole is coaxial with the fat storage hole, and the diameter of the oil outlet hole is smaller than the fat storage hole; a positioning structure is provided in the lower part of the fat storage hole; a ball is provided in the upper part of the fat storage hole; the diameter of the ball is smaller than the diameter of the fat storage hole, and the diameter of the ball is larger than the diameter of the oil outlet hole; the positioning structure pushes the upper end of the ball into the oil outlet hole, and the upper end face of the ball is coplanar with the bottom of the guide groove; the ball can roll when subjected to external force; the edge of the hole opening at the lower end of the oil outlet hole is provided with a plurality of notches evenly distributed around the circumference.

2. The steering gear guide block grease storage structure according to claim 1, characterized in that: The positioning structure includes a positioning seat screwed into the lower part of the grease storage hole; the upper surface of the positioning seat is in contact with the lower end surface of the ball; an oil pressure hole is provided in the center of the lower surface of the positioning seat; a plurality of evenly distributed oil holes are provided on the upper surface of the positioning seat; a fixing seat is screwed into the lower part of the oil pressure hole.

3. The steering gear guide block grease storage structure according to claim 2, characterized in that: An oil pressure plate is provided in the middle of the oil pressure hole, and the oil pressure plate can move up and down along the track of the inner wall of the oil pressure hole; a guide column is provided in the center of the upper surface of the fixed seat; a guide hole is provided in the center of the upper end surface of the guide column; a guide rod matching the guide hole is provided in the center of the lower surface of the oil pressure plate; a spring is provided outside the guide column between the lower surface of the oil pressure plate and the upper surface of the fixed seat.

4. The steering gear guide block grease storage structure according to claim 3, characterized in that: An annular sealing groove is provided on the outer peripheral surface of the oil pressure plate; a sealing ring matching the sealing groove is provided in the sealing groove.

5. The steering gear guide block grease storage structure according to claim 3, characterized in that: An upper screw hole is provided at the center of the lower surface of the oil pressure plate, and the upper end of the guide rod is screwed into the upper screw hole; a lower screw hole is provided at the center of the upper surface of the fixing seat, and the lower end of the guide column is screwed into the lower screw hole.

6. The steering gear guide block grease storage structure according to claim 2, characterized in that: A disassembly hole is provided at the center of the lower surface of the fixing seat, and the disassembly hole is in a regular hexagonal shape.

7. The steering gear guide block grease storage structure according to claim 1, characterized in that: The outer wall of the ball is provided with a plurality of evenly distributed arc-shaped grooves.

8. The steering gear guide block grease storage structure according to claim 2, characterized in that: An annular positioning groove is provided on the inner wall of the lower end opening of the grease storage hole; and a positioning portion matching the positioning groove is provided on the outer wall of the lower end of the positioning seat.

9. The steering gear guide block grease storage structure according to claim 2, characterized in that: The lower end opening of the oil pressure hole is in the shape of a regular hexagon.

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