Automobile steering pull rod structure

Abstract

The invention discloses an automobile steering pull rod structure which comprises a ball seat and a ball head cover installed on the ball seat, a ball head is arranged in the ball seat and the ball head cover, a plurality of first rolling grooves are formed in the ball seat, first balls are placed on the first rolling grooves, an oil cavity used for containing lubricating oil is formed in the ball seat, and the first rolling grooves are communicated with the oil cavity. An oil outlet hole is formed between the oil cavity and the first rolling groove, and an oil injection piece is installed in the oil outlet hole. The ball head is in rolling contact with the ball seat through the ball I, so that friction and abrasion between the ball head and the ball seat are greatly reduced, and the use stability and safety of the steering pull rod are improved; when the ball head rotates in the ball seat, the first ball is driven to slide in the first rolling groove, meanwhile, an oil injection piece is arranged on the ball seat, the first ball abuts against the oil injection piece in the process of rolling along the first rolling groove, and part of lubricating oil in an oil cavity is extruded to the first ball through the oil injection piece, so that the lubricity among the ball seat, the first ball and the ball head is improved; the service life of the steering pull rod is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of steering tie rods, in particular to a steering tie rod structure for an automobile. Background Art

[0002] The steering rod is an important component used for automobile steering. One end of the steering rod is connected to the steering gear under the steering wheel, and the other end is connected to the steering knuckle of the wheel. When the steering wheel is turned, the steering gear controls the steering rod to move laterally, so as to drive the steering knuckle to rotate through the steering rod, and then drive the wheel on the steering knuckle to turn, thereby controlling the direction of the car.

[0003] When the existing steering rod controls the rotation of the steering knuckle, the ball head of the steering rod will directly contact the ball seat, which leads to a high degree of wear between the ball head and the ball seat. With the long-term use of the steering rod, it is easy to affect the stability and safety of the car.

[0004] Although lubricating oil is injected between the ball head and the ball seat during the assembly process of the steering rod to enhance the lubricity between the ball head and the ball seat, the lubricating oil will be gradually consumed as the use time increases. Therefore, the entire steering rod needs to be disassembled regularly to add lubricating oil, but this will undoubtedly greatly increase the maintenance cost; and due to the small gap between the ball head and the ball seat, the amount of lubricating oil added each time is limited, which cannot meet the long-term effective use of the steering rod. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a vehicle steering rod structure.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A car steering tie rod structure comprises a ball seat and a ball head cover installed on the ball seat, a ball head is arranged in the ball seat and the ball head cover, a plurality of circumferentially distributed rolling grooves are provided in the ball seat, a ball is placed on the rolling groove, the ball head abuts on the ball, an oil cavity for accommodating lubricating oil is provided in the ball seat, an oil outlet hole is provided between the oil cavity and the rolling groove, an oil injection piece is installed in the oil outlet hole, the oil injection piece comprises a sleeve and a ball, a spring and an extrusion piece arranged in the sleeve, an abutment plate is provided on one side of the sleeve, a fixing ring is installed on the other side of the sleeve, the extrusion piece is slidably arranged between the abutment plate and the fixing ring, the spring abuts against the extrusion piece and one end of the extrusion piece passes through the fixing ring and extends to the rolling groove, the ball presses and blocks the oil hole, and the ball can press the extrusion piece to squeeze out the lubricating oil in the oil cavity.

[0008] Preferably, the abutment plate and the extrusion piece are respectively provided with an oil hole and an oil outlet channel, and the oil cavity is connected to the rolling groove 1 through the oil hole and the oil outlet channel.

[0009] Preferably, the oil outlet channel is provided with guide plates and baffles which are staggered up and down, the guide plates are located on the outside of the baffles, and the guide plates are arranged to tilt outwards.

[0010] Preferably, a limiting ring is provided on the extrusion piece, one end of the spring is sleeved on the outer circumference of the limiting ring, and the limiting ring is provided with an inclined guide surface arranged toward the oil outlet channel.

[0011] Preferably, a special-shaped hole is opened in the fixing ring, and the extrusion piece is fitted in the special-shaped hole.

[0012] Preferably, a limit cover is provided in the sleeve, a through hole is opened in the limit cover, the limit cover is abutted against the abutment plate through a spring, and the ball is arranged in the limit cover.

[0013] Preferably, an oil inlet pipe abutting against the abutment plate is provided in the oil outlet hole, an annular channel is opened in the oil inlet pipe, one end of the annular channel is connected to the oil cavity, and the other end of the annular channel corresponds to the oil hole.

[0014] Preferably, a plurality of circumferentially distributed rolling grooves 2 are provided in the ball head cover, a second ball is placed on the second rolling groove, and the ball head abuts against the first ball and the second ball up and down.

[0015] Preferably, an end cover is detachably mounted on the ball seat, the end cover is used to close the oil chamber, and a pull rod is fixed to one side of the ball seat.

[0016] The beneficial effects of the present invention are:

[0017] 1. A ball bearing is arranged in the ball seat, and the ball head is in rolling contact with the ball seat through the ball bearing, which greatly reduces the friction and wear between the ball head and the ball seat, and improves the stability and safety of the steering rod;

[0018] 2. By setting a rolling groove 1 in the ball seat, the ball head drives the ball 1 to slide in the rolling groove 1 when rotating in the ball seat, and an oil injection piece is set on the ball seat. The ball 1 will press the oil injection piece when rolling along the rolling groove 1, and then part of the lubricating oil in the oil cavity is squeezed onto the ball 1 through the oil injection piece, so as to increase the lubricity between the ball seat, the ball 1 and the ball head, and improve the service life of the steering tie rod;

[0019] 3. A guide plate and a baffle are arranged in the oil outlet channel of the extruded part, and the guide plate and the baffle are used to hinder the extruded lubricating oil of the oil injection part to a certain extent, so as to avoid the waste of lubricating oil caused by squeezing out excessive lubricating oil, thereby extending the service life of the lubricating oil and saving maintenance costs;

[0020] 4. By opening an oil chamber in the ball seat, more lubricating oil can be stored in the oil chamber, and when regularly maintaining and replenishing the lubricating oil, the end cover can be opened to add lubricating oil to the oil chamber, which improves the convenience of maintenance and can add more lubricating oil at one time, thereby increasing the maintenance cycle and reducing the cost of use and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the present invention;

[0022] Figure 2 It is an explosion schematic diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention without the ball head cover;

[0024] Figure 4 It is a schematic diagram of the structure of the ball head cover of the present invention;

[0025] Figure 5 The present invention is schematically shown in cross-section Figure 1 ;

[0026] Figure 6 for Figure 5 The enlarged schematic diagram of point A in the middle;

[0027] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0028] Figure 8 It is a schematic diagram of the explosion of the oil injection part of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the oil inlet pipe of the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the extrusion part of the present invention;

[0031] Fig.11 It is a structural schematic diagram of the limiting cover of the present invention;

[0032] Fig.12 It is a schematic diagram of the internal structure of the present invention;

[0033] Fig.13 The present invention is schematically shown in cross-section Figure 2 ;

[0034] Fig.14 for Fig.13 The enlarged schematic diagram of the center C;

[0035] Fig.15 It is a cross-sectional schematic diagram of the oil injection piece of the present invention.

[0036] In the figure: ball seat 1, rolling groove 11, ball 111, end cover 12, oil chamber 13, oil channel 131, oil outlet hole 14, sealing ring 15, mounting groove 151, pull rod 2, oil injection part 3, sleeve 31, abutment plate 311, oil hole 312, abutment surface 313, sphere 32, limit cover 33, through hole 331, bottom plate 332, spring 34, extrusion part 35, oil outlet channel 351, limit ring 352, guide surface 353, baffle 354, guide plate 355, fixing ring 36, oil inlet pipe 37, annular channel 371, ball head 4, connecting rod 41, ball head cover 5, rolling groove 2 51, ball 2 511, mounting hole 52. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0038] In the description of this specification, the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0039] like Figure 1 to Figure 15 As shown, a car steering rod structure includes a ball seat 1 and a ball head cover 5. A rod 2 is fixed to one side of the ball seat 1. The rod 2 can be fixed to the ball seat 1 by welding. The rod 2 is used to connect to an external steering gear. A mounting hole 52 is provided on the ball head cover 5. The ball head cover 5 is mounted and fixed on the ball seat 1 through the mounting hole 52.

[0040] A ball head 4 is provided inside the ball seat 1 and the ball head cover 5. The ball head 4 is gap-installed inside the ball seat 1 and the ball head cover 5. A connecting rod 41 is provided on one side of the ball head 4, which penetrates the ball head cover 5 and extends outward. The connecting rod 41 is threaded and is used to connect to an external steering knuckle.

[0041] The ball seat 1 is provided with a plurality of circumferentially distributed rolling grooves 11, on which a ball 111 is placed, and the ball head 4 abuts against the ball 111. In order to improve the stability of the ball head 4 in the ball seat 1, the ball head cover 5 is provided with a plurality of circumferentially distributed rolling grooves 51, and the rolling grooves 11 and the rolling grooves 51 are relatively distributed up and down, and a ball 2 511 is placed on the rolling grooves 51. The ball head 4 abuts against the ball 1 111 and the ball 2 511 up and down, and the ball 1 111 cooperates with the ball 2 511 to make rolling contact with the ball head 4, that is, the ball head 4 and the ball seat 1 are indirectly in contact through the ball 111 and the ball 2 511, so as to reduce the friction and wear between the ball head 4 and the ball seat 1, thereby improving the stability and safety of the present embodiment during use and extending its normal service life.

[0042] In order to further improve the stability of use and service life of this embodiment, an oil chamber 13 for containing lubricating oil is opened in the ball seat 1. The lubricating oil in the oil chamber 13 can be slowly added to the ball 111 to improve the lubricity between the ball seat 1, the ball 111 and the ball head 4, thereby improving the service life of this embodiment.

[0043] The oil chamber 13 can contain a large amount of lubricating oil. An end cover 12 is detachably mounted on the ball seat 1. The end cover 12 is used to seal the oil chamber 13. The lubricating oil in the oil chamber 13 can be replenished by opening the end cover 12.

[0044] An oil outlet hole 14 is provided between the oil chamber 13 and the rolling groove 11. The oil outlet hole 14 is inclined upward to connect the oil chamber 13 and the rolling groove 11. An oil injection piece 3 is installed in the oil outlet hole 14. One end of the oil injection piece 3 extends to the rolling groove 11. When the ball head 4 rotates to drive the ball 111 in the rolling groove 11 to roll, the ball 111 can press the protruding end of the oil injection piece 3 to squeeze out part of the lubricating oil in the oil chamber 13 through the oil injection piece 3, so as to squeeze the lubricating oil onto the ball 111, thereby replenishing the lubricating oil consumed between the ball head 4 and the ball seat 1, ensuring that the ball seat 1, the ball 111 and the ball head 4 can be lubricated with lubricating oil for a long time.

[0045] Compared with the traditional method of adding lubrication between the ball seat 1 and the ball head 4 during assembly or maintenance, the present embodiment can supplement the lubrication during use, which greatly reduces the wear of the ball seat 1 and the ball head 4 and ensures that the present embodiment has a good service life and performance.

[0046] During regular maintenance, the lubricating oil in the oil chamber 13 can be replenished by opening the end cover 12, which improves the convenience of adding lubricating oil. Moreover, since more lubricating oil can be added to the oil chamber 13 at one time, the period for the lubricating oil to be consumed will be longer, so the maintenance period of this embodiment can be appropriately extended, reducing the cost of use and maintenance.

[0047] The oil injection piece 3 includes a sleeve 31 and a ball 32, a spring 34, and an extrusion piece 35 arranged in the sleeve 31. The sleeve 31 is interference-fitted in the oil outlet hole 14. An abutment plate 311 is provided on one side of the sleeve 31, and the other side of the sleeve 31 is open. The sleeve 31 is arranged as a whole obliquely upward along the oil outlet hole 14.

[0048] A fixing ring 36 is installed at the opening on the other side of the sleeve 31. The fixing ring 36 can be installed in the sleeve 31 by threads. The extrusion piece 35 is slidably arranged between the abutment plate 311 and the fixing ring 36. One end of the spring 34 abuts on the abutment plate 311, and the other end of the spring 34 abuts on the extrusion piece 35. One end of the extrusion piece 35 passes through the fixing ring 36 and extends to the rolling groove 11. When the extrusion piece 35 is extruded, the end of the extrusion piece 35 extending out of the fixing ring 36 can be displaced into the sleeve 31.

[0049] The abutment plate 311 and the extrusion piece 35 are respectively provided with an oil hole 312 and an oil outlet channel 351. The oil chamber 13 is connected to the rolling groove 11 through the oil hole 312 and the oil outlet channel 351. Specifically, a cavity for temporarily storing lubricating oil is formed between the connection plate 311 and the fixing ring 36. When the rolling ball 111 squeezes the extrusion piece 35, the extrusion piece 35 slides into the sleeve 31, thereby compressing the cavity containing the lubricating oil in the sleeve 31, so as to squeeze out the lubricating oil in the cavity through the oil outlet channel 351.

[0050] Furthermore, in order to ensure the reliability of extrusion for lubrication, the sphere 32 is pressed against and blocks the oil hole 312. The sphere 32 is made of stainless steel, and because the sleeve 31 is arranged to be inclined upward, the sphere 32 will move downward under the action of gravity until it fits and blocks the oil hole 312. When the extrusion piece 35 slides into the sleeve 31 to compress the cavity, the sphere 32 will be squeezed to further fit and block the oil hole 312, thereby ensuring that the lubricating oil in the cavity can only be squeezed out through the oil outlet channel 351.

[0051] When the ball 111 rolls away from the extrusion piece 35, the extrusion piece 35 is displaced outward under the action of the spring 34 to increase the volume of the cavity, and then the lubricating oil in the oil chamber 13 is squeezed into the cavity through the oil hole 312 to replenish the lubricating oil in the cavity.

[0052] The extrusion piece 35 is provided with a limiting ring 352, and one end of the spring 34 is sleeved on the outer circumference of the limiting ring 352. The limiting ring 352 guides the spring 34 so that the spring 34 can more reliably push the extrusion piece 35 to move outward. The limiting ring 352 is provided with an inclined guide surface 353 arranged toward the oil outlet channel 351. When the lubricating oil in the cavity is squeezed out, the guide surface 353 is used for inclined guidance, so that the lubricating oil can be squeezed out more smoothly.

[0053] In order to improve the reliability of sealing of the ball 32, a limit cover 33 is provided in the sleeve 31, and a through hole 331 is opened on the limit cover 33. The outer periphery of the limit cover 33 is provided with a bottom plate 332 that fits the abutment plate 311. The outer periphery of the bottom plate 332 fits the inner periphery of the sleeve 31, and the spring 34 is pressed on the bottom plate 332, and then the limit cover 33 is abutted on the abutment plate 311 through the spring 34. The ball 32 is arranged in the limit cover 33, and the ball 32 can be displaced in the limit cover 33 to seal or open the oil hole 312 by displacement.

[0054] The oil hole 312 is provided with a contact surface 313 that can fit with the ball 32 . The contact surface 313 allows the ball 32 to better fit and block the oil hole 312 .

[0055] The oil outlet channel 351 is provided with guide plates 355 and baffles 354 which are staggered up and down. The guide plates 355 are located on the outside of the baffles 354. The guide plates 355 are tilted outwardly. The guide plates 355 and the baffles 354 hinder the extruded lubricating oil of the oil injection piece 3 to a certain extent. That is, the setting of the guide plates 355 and the baffles 354 reduces the amount of lubricating oil extruded at a single time, so as to avoid the waste of lubricating oil caused by squeezing out excessive lubricating oil, thereby extending the service life of the lubricating oil and saving maintenance costs.

[0056] The cross section of the oil outlet channel 351 is circular, and the cross section of the baffle 354 is semicircular. The baffle 354 blocks the lower half of the oil outlet channel 351. The baffle 354 is arranged to prevent the extruded lubricating oil from flowing back. The returned lubricating oil may carry impurities and further contaminate the lubricating oil in the sleeve 31 or even the oil chamber 13.

[0057] The blocking setting of the guide plate 355 tilted outward can avoid the waste caused by the direct spraying of the lubricating oil, so that the lubricating oil can only be squeezed onto the ball 111, so as to ensure that the lubricating oil can fully play a role in lubricating the ball 111.

[0058] The fixing ring 36 has a special-shaped hole therein. In this embodiment, the fixing ring 36 has a hexagonal hole, and the extrusion piece 35 is fitted in the special-shaped hole. The special-shaped hole of the fixing ring 36 is set so that the extrusion piece 35 will not rotate during the sliding process, that is, it will not interfere with the setting of the guide plate 355 and the baffle 354.

[0059] In order to further control the extrusion amount of lubricating oil to avoid waste of lubricating oil, an oil inlet pipe 37 abutting against the abutting plate 311 is provided in the oil outlet hole 14, and the oil inlet pipe 37 can be fixed in the oil outlet hole 14 by glue or the like. An annular channel 371 is opened in the oil inlet pipe 37, and the annular channel 371 extends in a spiral shape. One end of the annular channel 371 is connected to the oil chamber 13, and the other end of the annular channel 371 corresponds to the oil hole 312. The lubricating oil in the oil chamber 13 is squeezed into the oil hole 312 through the annular channel 371. The annular channel 371 is provided to increase the resistance of the lubricating oil in the oil chamber 13 to enter the oil injection piece 3, so as to reduce the amount of lubricating oil entering the oil injection piece 3 during a single extrusion.

[0060] Furthermore, the ball 111 may need to squeeze the extrusion piece 35 multiple times to squeeze out the lubricant from the oil injection piece 3, so as to make full use of the lubricating oil and avoid unnecessary waste caused by excessive lubricating oil. By setting the annular channel 371, the lubricating oil in the oil chamber 13 is prevented from directly entering the oil injection piece 3 through the oil hole 312, thereby preventing excessive use of the lubricating oil. This allows the present embodiment to maintain a relatively long service life of the lubricating oil, thereby relatively reducing the cost and time of maintenance.

[0061] The ball seat 1 is provided with an oil passage 131 connected with the oil chamber 13, and the oil passage 131 is connected with the oil outlet hole 14 in a one-to-one correspondence. The oil passage 131 passes through the ball seat 1 and extends to the ball head cover 5. A sealing ring 15 is provided between the oil passage 131 and the ball head cover 5. The oil passage 131 is provided with a mounting groove 151 for placing the sealing ring 15. The sealing ring 15 is placed in the mounting groove 151. When the ball head cover 5 is installed on the ball seat 1, the sealing ring 15 abuts against the ball head cover 5 to seal the oil passage 131 to prevent the lubricating oil in the oil passage 131 from flowing out from the fitting between the oil passage 131 and the ball head cover 5.

[0062] When the lubricating oil may deteriorate due to long service life and the oil chamber 13 needs to be thoroughly cleaned, the oil passage 131 can cooperate with the end cover 12 to quickly open and clean the oil chamber 13, thereby improving the maintenance efficiency of this embodiment.

[0063] The oil outlet hole 14 is opened at the lower part of the oil channel 131 and is higher than the bottom of the oil channel 131 to prevent a small amount of impurities deposited in the lubricating oil from entering the oil filling piece 3 through the oil hole 312 and causing problems such as blockage of the oil filling piece 3. By settling the small amount of impurities deposited in the lubricating oil at the bottom of the oil channel 131, they can be removed through the oil channel 131 when cleaning the oil chamber 13.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steering rod structure for an automobile, comprising a ball seat (1) and a ball head cover (5) mounted on the ball seat (1), wherein a ball head (4) is provided inside the ball seat (1) and the ball head cover (5), and characterized in that: The ball seat (1) is provided with a plurality of circumferentially distributed rolling grooves (11), a ball (111) is placed on the rolling groove (11), the ball head (4) abuts against the ball (111), an oil chamber (13) for containing lubricating oil is provided in the ball seat (1), an oil outlet hole (14) is provided between the oil chamber (13) and the rolling groove (11), an oil injection piece (3) is installed in the oil outlet hole (14), the oil injection piece (3) comprises a sleeve (31) and a ball (32) arranged in the sleeve (31), a spring (34), an extrusion piece (35), a contact plate (311) is provided on one side of the sleeve (31), a fixing ring (36) is installed on the other side of the sleeve (31), the extrusion piece (35) is slidably arranged between the contact plate (311) and the fixing ring (36), the spring (34) is in contact with the extrusion piece (35), and one end of the extrusion piece (35) passes through the fixing ring (36) and extends to the rolling groove (11), the ball (32) is pressed to block the oil hole (312), and the ball (111) can press the extrusion piece (35) to squeeze out the lubricating oil in the oil chamber (13).

2. The automobile steering rod structure according to claim 1, characterized in that: The abutment plate (311) and the extrusion piece (35) are respectively provided with an oil hole (312) and an oil outlet channel (351), and the oil chamber (13) is connected to the rolling groove 1 (11) through the oil hole (312) and the oil outlet channel (351).

3. The automobile steering rod structure according to claim 2, characterized in that: The oil outlet channel (351) is provided with guide plates (355) and baffles (354) which are staggered up and down. The guide plates (355) are located outside the baffles (354) and are arranged to be inclined outward.

4. The automobile steering rod structure according to claim 2, characterized in that: The extrusion piece (35) is provided with a limiting ring (352), one end of the spring (34) is sleeved on the outer periphery of the limiting ring (352), and the limiting ring (352) is provided with an inclined guide surface (353) arranged toward the oil outlet channel (351).

5. The automobile steering rod structure according to claim 1, characterized in that: The fixing ring (36) is provided with a special-shaped hole, and the extrusion piece (35) is fitted in the special-shaped hole.

6. The automobile steering rod structure according to claim 1, characterized in that: A limiting cover (33) is arranged inside the sleeve (31), a through hole (331) is opened on the limiting cover (33), the limiting cover (33) abuts against the abutting plate (311) through a spring (34), and the ball (32) is arranged inside the limiting cover (33).

7. The automobile steering rod structure according to claim 1, characterized in that: An oil inlet pipe (37) abutting against the abutting plate (311) is provided in the oil outlet hole (14), and an annular channel (371) is provided in the oil inlet pipe (37), one end of the annular channel (371) is connected to the oil chamber (13), and the other end of the annular channel (371) corresponds to the oil hole (312).

8. The automobile steering rod structure according to claim 1, characterized in that: The ball head cover (5) is provided with a plurality of circumferentially distributed rolling grooves (51), on which a second ball (511) is placed, and the ball head (4) abuts against the first ball (111) and the second ball (511) up and down.

9. The automobile steering rod structure according to claim 1, characterized in that: An end cover (12) is detachably mounted on the ball seat (1), and the end cover (12) is used to seal the oil chamber (13). A pull rod (2) is fixed to one side of the ball seat (1).

10. The automobile steering rod structure according to claim 1, characterized in that: The ball seat (1) is provided with an oil passage (131) connected to the oil chamber (13); the oil passage (131) is connected to the oil outlet hole (14) in a one-to-one correspondence; the oil passage (131) passes through the ball seat (1) and extends to the ball head cover (5); a sealing ring (15) is provided between the oil passage (131) and the ball head cover (5).

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