Rack supporting mechanism, steering gear and vehicle

Abstract

The utility model relates to a rack supporting mechanism, a steering gear and a vehicle, the rack supporting mechanism comprises a supporting piece, a pressing block, an adjusting piece and a locking nut, and the supporting piece is used for abutting against the back of a rack; the pressing block is arranged between the supporting piece and the adjusting piece, the adjusting piece is provided with an external thread, and the external thread is used for being in threaded connection with a shell of the steering gear; the locking nut is arranged on the side, away from the pressing block, of the adjusting piece and is in threaded connection with the external thread, and the side, facing the pressing block, of the locking nut is used for abutting against the shell. According to the rack supporting mechanism, the locking nut is in threaded connection with the external thread of the adjusting piece, the side, facing the pressing block, of the locking nut abuts against the shell, the adjusting piece is locked on the shell, the problem that the adjusting piece is loosened is solved, and therefore the meshing reliability of the gear and the rack can be improved, and the risk that a steering gear generates noise is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicles, and in particular to a rack support mechanism, a steering gear, and a vehicle. Background Art

[0002] The steering gear is designed with a rack-and-pinion meshing mechanism and a rack support mechanism. The rack support mechanism is used to adjust the meshing clearance between the gear and rack. The rack support mechanism includes a pressure block and an adjustment member. The pressure block contacts the side of the rack away from the gear. The adjustment member presses the pressure block against the rack, applying a preload force to the rack. In related art, the adjustment member is prone to loosening, which reduces the preload force applied by the pressure block on the rack, affecting the meshing reliability of the gear and rack and increasing the risk of noise generation in the steering gear. Utility Model Content

[0003] The present disclosure provides a rack support mechanism to reduce the risk of noise generated by a steering gear.

[0004] The rack support mechanism disclosed in the present invention is used to adjust the meshing clearance between the gear and rack of the steering gear. The rack support mechanism includes a support member, a pressure block, an adjusting member and a locking nut. The support member is used to stop at the back of the rack; the pressure block is arranged between the support member and the adjusting member, the support member is connected to the pressure block, the adjusting member is used to press the pressure block in the direction toward the rack, the adjusting member is provided with an external thread, and the external thread is used to be threadedly connected to the housing of the steering gear; the locking nut is arranged on the side of the adjusting member away from the pressure block and is threadedly connected to the external thread, and the side of the locking nut facing the pressure block is used to stop at the housing.

[0005] Optionally, the rack support mechanism further includes an elastic member, which is arranged between the pressing block and the adjusting member to apply an elastic force to the pressing block in a direction toward the supporting member.

[0006] Optionally, the pressing block is provided with a pressing block groove with a notch facing the adjusting member, and at least a portion of the elastic member is arranged in the pressing block groove.

[0007] Optionally, a column is provided in the pressing block groove, and at least a portion of the elastic member is sleeved on the column.

[0008] Optionally, the adjusting member is provided with a measuring hole, the measuring hole is communicated with the pressing block groove, and the end surface of the column facing the adjusting member forms a measuring surface.

[0009] Optionally, the support member is rotatably connected to the pressing block so as to rotate the support member when the rack moves.

[0010] Optionally, the pressure block is provided with an accommodating cavity with an opening toward the support member, and at least a portion of the support member is arranged in the accommodating cavity; the pressure block is provided with a slot communicating with the accommodating cavity, the notch of the slot faces the support member, and the rotating shaft of the support member is rotatably connected to the slot.

[0011] Optionally, a vibration damping member is provided between the adjusting member and the pressing block.

[0012] Optionally, the rack support mechanism further includes a first sealing ring and / or a second sealing ring, wherein the first sealing ring is sleeved on the outer peripheral wall of the pressure block, and the first sealing ring is used to seal the gap between the pressure block and the shell; the second sealing ring is sleeved on the outer peripheral wall of the adjusting member, and the second sealing ring is used to seal the gap between the adjusting member and the shell.

[0013] Optionally, there are multiple first sealing rings, and the multiple first sealing rings are arranged at intervals.

[0014] The present disclosure also provides a steering gear.

[0015] The steering gear disclosed herein includes a housing, a gear, a rack and a rack support mechanism, wherein the gear and the rack are both arranged in the housing, and the gear is engaged with the rack; the rack support mechanism is the rack support mechanism described in any one of the above items, and the rack support mechanism is arranged on a side of the rack away from the gear, the support member stops at the back of the rack, the external thread is threadedly connected to the housing, and the locking nut stops at the housing on the side facing the pressure block.

[0016] The present disclosure also provides a vehicle.

[0017] The vehicle disclosed herein includes the steering gear described in any one of the above items.

[0018] The rack support mechanism disclosed herein utilizes an external thread of an adjusting member threadedly connected to the steering gear housing to mount the rack support mechanism on the steering gear. The adjusting member presses the pressure block toward the support member, causing the pressure block to apply pressure to the support member, thereby causing the support member to abut against the back of the rack, thereby supporting the rack. By threading a locking nut into the external thread of the adjusting member, with the locking nut abutting against the housing on the side facing the pressure block, the adjusting member is locked to the housing, preventing the adjusting member from loosening, thereby improving the meshing reliability of the gear and rack and reducing the risk of noise from the steering gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of a steering gear according to an embodiment of the present disclosure.

[0020] Figure 2It is a front view of the steering gear of an embodiment of the present disclosure.

[0021] Figure 3 yes Figure 2 AA view.

[0022] Figure 4 yes Figure 2 BB direction view.

[0023] Figure 5 is an exploded view of a steering gear according to an embodiment of the present disclosure.

[0024] Reference numerals:

[0025] 100. Steering gear;

[0026] 10. Rack support mechanism;

[0027] 1. Support member; 11. Support body; 111. Stop surface; 12. First rotating shaft; 13. Second rotating shaft;

[0028] 2. Press block; 21. Accommodating cavity; 2101. Card slot; 211. First cavity wall; 212. Second cavity wall; 22. Press block slot; 221. Column; 2211. Measuring surface; 23. First mounting slot;

[0029] 3. Adjustment member; 31. External thread; 32. Adjustment slot; 33. Second mounting slot; 34. Third mounting slot; 35. Measuring hole;

[0030] 4. Elastic parts;

[0031] 5. Locking nut; 51. Fitting surface;

[0032] 6. First sealing ring;

[0033] 7. Second sealing ring;

[0034] 8. Vibration damping parts;

[0035] 9. Sealing plug;

[0036] 20. Housing; 201. Mounting hole; 202. End face;

[0037] 30. Gear;

[0038] 40. Rack; 401. Back. DETAILED DESCRIPTION

[0039] The embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present disclosure, but should not be understood as limiting the present disclosure.

[0040] like Figures 1 to 5 As shown, the rack support mechanism 10 of the embodiment of the present disclosure is used to adjust the meshing clearance between the gear 30 and the rack 40 of the steering gear 100. The rack support mechanism 10 includes a support member 1, a pressure block 2, an adjusting member 3 and a locking nut 5. The support member 1 is used to stop at the back 401 of the rack 40. The pressure block 2 is arranged between the support member 1 and the adjusting member 3. The support member 1 is connected to the pressure block 2. The adjusting member 3 is used to press the pressure block 2 in the direction toward the rack 40. The adjusting member 3 is provided with an external thread 31, and the external thread 31 is used to be threadedly connected to the housing 20 of the steering gear 100. The locking nut 5 is arranged on the side of the adjusting member 3 away from the pressure block 2 and is threadedly connected to the external thread 31. The side of the locking nut 5 facing the pressure block 2 is used to stop at the housing 20.

[0041] For example, the adjusting member 3 is a stud having an external thread 31, which is threadedly connected to the threaded hole of the housing 20. By adjusting the pressing force of the pressure block 2 on the support member 1 by screwing the adjusting member 3, the pre-tightening force of the support member 1 on the rack 40 can be adjusted. Figure 3 As shown, the housing 20 has an end surface 202 facing the locking nut 5 , and the locking nut 5 has a contact surface 51 facing the housing 20 , and the contact surface 51 is in contact with the end surface 202 .

[0042] The rack support mechanism 10 of the embodiment of the present disclosure is installed on the steering gear 100 by threading the external thread 31 of the adjusting member 3 with the housing 20 of the steering gear 100. The adjusting member 3 presses the pressure block 2 in the direction toward the support member 1, so that the pressure block 2 applies pressure to the support member 1, thereby causing the support member 1 to abut against the back 401 of the rack 40, thereby supporting the rack 40. By threading the locking nut 5 with the external thread 31 of the adjusting member 3, and abutting against the housing 20 on the side of the locking nut 5 facing the pressure block 2, the adjusting member 3 is locked to the housing 20, preventing the adjusting member 3 from loosening, thereby improving the meshing reliability of the gear 30 and the rack 40 and reducing the risk of noise generation in the steering gear 100.

[0043] Optionally, the support member 1 is rotatably connected to the pressing block 2 so that the support member 1 rotates when the rack 40 moves.

[0044] For example, Figures 3 to 5 As shown, the support member 1 is provided with a stop surface 111 , and the stop surface 111 abuts against the back 401 of the rack 40 .

[0045] By rotatably connecting the support member 1 and the pressure block 2, the support member 1 rotates when the rack 40 moves, thereby creating rolling friction between the stop surface 111 of the support member 1 and the back 401 of the rack 40. This can reduce the friction between the support member 1 and the rack 40, improve the feel of the steering gear 100, and reduce the risk of noise from the steering gear 100. In addition, it can also reduce the wear between the support member 1 and the rack 40.

[0046] Alternatively, as Figure 5 As shown, the support member 1 includes a support body 11 , which is a rotating body. The outer peripheral surface of the support body 11 forms a stop surface 111 , and the center line of the support body 11 coincides with the rotation axis of the support member 1 .

[0047] For example, the back 401 of the rack 40 is an arc surface, and the generatrix of the supporting body 11 is an arc.

[0048] By making the support body 11 a rotating body, the outer peripheral surface of the support body 11 forms a stop surface 111, and the center line of the support body 11 coincides with the rotation axis of the support member 1, so that when the support member 1 rotates to any angle, the stop surface 111 can stop at the back 401 of the rack 40, thereby improving the practicality of the rack support mechanism 10.

[0049] It is understandable that when the rack 40 moves, the support member 1 is subjected to an axial force from the rack 40 , and the support member 1 needs to be axially limited, resulting in a more complex structure of the rack support mechanism 10 .

[0050] In some embodiments, the rotation axis of the support 1 is parallel to the moving direction of the rack 40 .

[0051] By setting the rotation axis of the support member 1 to be parallel to the moving direction of the rack 40, the support member 1 can be prevented from being subjected to axial force from the rack 40, so that there is no need to axially limit the support member 1, thereby simplifying the structure of the rack support mechanism 10 and reducing the cost of the rack support mechanism 10.

[0052] In some embodiments, as Figure 3 As shown, the pressing block 2 is provided with an accommodating cavity 21 with an opening facing the supporting member 1 , and at least a portion of the supporting member 1 is disposed in the accommodating cavity 21 .

[0053] At least a portion of the support member 1 is disposed in the accommodating cavity 21 , which can be understood as: a portion of the support member 1 is disposed in the accommodating cavity 21 , and another portion of the support member 1 is disposed outside the accommodating cavity 21 ; or, the entire support member 1 is disposed in the accommodating cavity 21 .

[0054] By arranging at least a portion of the support member 1 in the accommodating cavity 21 , the structural compactness of the rack support mechanism 10 can be improved, the overall volume of the rack support mechanism 10 can be reduced, and the cost of the rack support mechanism 10 can be reduced.

[0055] Optionally, the pressing block 2 is provided with a slot 2101 communicating with the accommodating cavity 21 , the notch of the slot 2101 faces the support member 1 , and the rotating shaft of the support member 1 is rotatably connected to the slot 2101 .

[0056] For example, Figure 3 As shown, the accommodating chamber 21 has a first cavity wall 211 and a second cavity wall 212 arranged opposite each other, each of which is provided with a slot 2101. The support member 1 has a first rotating shaft 12 and a second rotating shaft 13 arranged opposite each other. The first rotating shaft 12 is rotatably connected to the slot 2101 in the first cavity wall 211, and the second rotating shaft 13 is rotatably connected to the slot 2101 in the second cavity wall 212.

[0057] The above-mentioned connection method between the support member 1 and the pressing block 2 can improve the connection reliability between the support member 1 and the pressing block 2, as well as the force stability of the support member 1, and improve the reliability of the rack support mechanism 10.

[0058] Optionally, the rack support mechanism 10 further includes an elastic member 4 , which is disposed between the pressing block 2 and the adjusting member 3 to apply an elastic force to the pressing block 2 toward the supporting member 1 .

[0059] For example, the elastic member 4 is a spring, and two ends of the spring respectively abut against the pressing block 2 and the adjusting member 3 .

[0060] By arranging an elastic member 4 between the pressure block 2 and the adjusting member 3, and using the elastic member 4 to apply pressure to the support member 1 toward the rack 40, the support member 1 can be kept in contact with the rack 40, thereby preventing the meshing gap between the rack 40 and the gear 30 from becoming larger, affecting the meshing reliability of the rack 40 and the gear 30, and further reducing the risk of the steering gear 100 generating noise.

[0061] Alternatively, as Figure 3 As shown, the pressing block 2 is provided with a pressing block groove 22 with a notch facing the adjusting member 3 , and at least a portion of the elastic member 4 is disposed in the pressing block groove 22 .

[0062] Among them, at least a part of the elastic member 4 is arranged in the pressing block groove 22, which can be understood as: a part of the elastic member 4 is arranged in the pressing block groove 22, and another part of the elastic member 4 is arranged outside the pressing block groove 22; or, the elastic member 4 is arranged in its entirety in the pressing block groove 22.

[0063] By disposing at least a portion of the elastic member 4 in the pressure block groove 22 , the structural compactness of the rack support mechanism 10 can be improved, the overall volume of the rack support mechanism 10 can be reduced, and the cost of the rack support mechanism 10 can be reduced.

[0064] Alternatively, as Figure 3 As shown, the adjusting member 3 is provided with an adjusting groove 32 with a notch facing the pressing block 2 , and at least a portion of the elastic member 4 is disposed in the adjusting groove 32 .

[0065] Among them, at least a part of the elastic member 4 is arranged in the adjustment groove 32, which can be understood as: a part of the elastic member 4 is arranged in the adjustment groove 32, and another part of the elastic member 4 is arranged outside the adjustment groove 32; or, the elastic member 4 is arranged in its entirety in the adjustment groove 32.

[0066] By disposing at least a portion of the elastic member 4 in the adjustment groove 32 , the structural compactness of the rack support mechanism 10 can be improved, the overall volume of the rack support mechanism 10 can be reduced, and the cost of the rack support mechanism 10 can be reduced.

[0067] Alternatively, as Figure 3 and Figure 4 As shown, a column 221 is provided in the pressing block groove 22 , and at least a portion of the elastic member 4 is sleeved on the column 221 .

[0068] By setting a column 221 in the pressure block groove 22, at least a part of the elastic member 4 is sleeved on the column 221, and the column 221 can be used to position the elastic member 4, thereby improving the assembly accuracy of the elastic member 4 and further improving the reliability of the rack support mechanism 10.

[0069] like Figures 3 to 5 As shown, the adjusting member 3 is provided with a measuring hole 35, which is communicated with the pressing block groove 22, and the end surface of the column 221 facing the adjusting member 3 forms a measuring surface 2211. The measuring hole 35 is used to measure the gap of the pressing block 2.

[0070] When measuring the gap of the pressing block 2, a caliper can be inserted into the pressing block groove 22 through the measuring hole 35, and the end of the caliper abuts against the measuring surface 2211 of the column 221, thereby measuring the gap of the pressing block 2 and indirectly obtaining the compression amount of the elastic member 4.

[0071] By forming a measuring surface 2211 with the end surface of the column 221 facing the adjusting member 3 , it is convenient to measure the gap of the pressing block 2 , which is beneficial to improving the installation efficiency of the rack support mechanism 10 .

[0072] Alternatively, as Figures 3 to 5 As shown, the rack support mechanism 10 includes a sealing plug 9 , which is used to seal the measuring hole 35 .

[0073] The sealing plug 9 may be a rubber plug, and the sealing plug 9 may be interference fit with the measuring hole 35 .

[0074] Alternatively, as Figures 3 to 5 As shown, a vibration damping member 8 is provided between the adjusting member 3 and the pressing block 2. The vibration damping member 8 can be an O-ring.

[0075] For example, Figure 3 As shown, the end surface of the adjusting member 3 facing the pressing block 2 is provided with a third mounting groove 34 , and the vibration damping member 8 is installed in the third mounting groove 34 , and the vibration damping member 8 abuts against the end surface of the pressing block 2 .

[0076] By providing the vibration damping member 8 between the adjusting member 3 and the pressure block 2 , a buffering and shock absorbing effect can be achieved, thereby improving the reliability of the steering gear 100 .

[0077] Alternatively, as Figures 3 to 5 As shown, the rack support mechanism 10 further includes a first sealing ring 6, which is sleeved on the outer peripheral wall of the pressing block 2. The first sealing ring 6 is used to seal the gap between the pressing block 2 and the housing 20. The first sealing ring 6 can be an O-ring.

[0078] For example, Figure 3 As shown, the housing 20 has a mounting hole 201, and the rack support mechanism 10 is installed in the mounting hole 201. The outer peripheral wall of the pressure block 2 has a first mounting groove 23, and the first sealing ring 6 is installed in the first mounting groove 23, and the first sealing ring 6 abuts against the hole wall of the mounting hole 201.

[0079] By providing the first sealing ring 6 , a sealing function as well as a buffering and shock absorbing function can be achieved between the pressure block 2 and the housing 20 , thereby improving the reliability of the steering gear 100 .

[0080] Alternatively, as Figures 3 to 5 As shown, there are multiple first sealing rings 6 , and the multiple first sealing rings 6 are arranged at intervals.

[0081] For example, there are two first sealing rings 6 , which are spaced apart along the extending direction of the mounting hole 201 . Both sealing rings are used to seal the gap between the pressing block 2 and the housing 20 .

[0082] By providing a plurality of first sealing rings 6 , the sealing effect and the buffering and shock absorbing effect between the pressure block 2 and the housing 20 can be improved, and the reliability of the steering gear 100 can be further improved.

[0083] Alternatively, as Figures 3 to 5 As shown, the rack support mechanism 10 further includes a second sealing ring 7, which is sleeved on the outer peripheral wall of the adjusting member 3 and is used to seal the gap between the adjusting member 3 and the housing 20. The second sealing ring 7 can be an O-ring.

[0084] For example, Figure 3 As shown, the outer peripheral wall of the adjusting member 3 is provided with a second mounting groove 33 , and the second sealing ring 7 is mounted in the second mounting groove 33 , and the second sealing ring 7 abuts against the hole wall of the mounting hole 201 .

[0085] By providing the second sealing ring 7 , a sealing function can be achieved between the adjusting member 3 and the housing 20 , thereby improving the reliability of the steering gear 100 .

[0086] like Figures 1 to 5 As shown, the steering gear 100 of the present disclosure includes a housing 20, a gear 30, a rack 40, and a rack support mechanism 10. The gear 30 and the rack 40 are both disposed within the housing 20, and the gear 30 meshes with the rack 40. The rack support mechanism 10 is the rack support mechanism 10 described in any of the above embodiments. The rack support mechanism 10 is disposed on a side of the rack 40 away from the gear 30. The support member 1 abuts against the back 401 of the rack 40, and the external thread 31 is threadedly connected to the housing 20. The locking nut abuts against the housing 20 on the side facing the pressure block 2. For example, Figure 3 As shown, the housing 20 is provided with a mounting hole 201 , and the rack support mechanism 10 is mounted in the mounting hole 201 .

[0087] The steering gear 100 of the disclosed embodiment, by threading the locking nut 5 with the external thread 31 of the adjusting member 3, and with the locking nut 5 abutting against the housing 20 on the side facing the pressure block 2, locks the adjusting member 3 to the housing 20, thereby preventing the adjusting member 3 from loosening, thereby improving the meshing reliability of the gear 30 and the rack 40 and reducing the risk of noise generation by the steering gear 100. When the rack 40 moves, the support member 1 rotates, resulting in rolling friction between the support member 1 and the rack 40. The friction between the support member 1 and the rack 40 is low, the transmission efficiency is high, and it is not easy to wear. After long-term use, the gap between the support member 1 and the rack 40 changes little, and the support stiffness of the rack support mechanism 10 is stable, so that the vehicle still has low noise after long-term use.

[0088] The vehicle according to the embodiment of the present disclosure includes the steering gear 100 described in any one of the above embodiments.

[0089] Although the embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. Any changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present disclosure.

Claims

1. A rack support mechanism for adjusting the meshing clearance between the gear and rack of a steering gear, characterized in that: include: a support member, the support member being used to abut against the back of the rack; a pressing block and an adjusting member, wherein the pressing block is disposed between the supporting member and the adjusting member, the supporting member is connected to the pressing block, the adjusting member is used to press the pressing block in a direction toward the rack, and the adjusting member is provided with an external thread, and the external thread is used to be threadedly connected to the housing of the steering gear; A locking nut is provided on a side of the adjusting member away from the pressing block and is threadedly connected to the external thread. The side of the locking nut facing the pressing block is used to stop at the shell.

2. The rack support mechanism according to claim 1, wherein: An elastic member is also included, and the elastic member is arranged between the pressing block and the adjusting member to apply an elastic force to the pressing block toward the supporting member.

3. The rack support mechanism according to claim 2, wherein: The pressing block is provided with a pressing block groove with a notch facing the adjusting member, and at least a portion of the elastic member is arranged in the pressing block groove.

4. The rack support mechanism according to claim 3, wherein: A column is provided in the pressing block groove, and at least a portion of the elastic member is sleeved on the column.

5. The rack support mechanism according to claim 4, characterized in that: The adjusting member is provided with a measuring hole, the measuring hole is communicated with the pressing block groove, and the end surface of the column facing the adjusting member forms a measuring surface.

6. The rack support mechanism according to claim 1, wherein: The support member is rotatably connected to the pressing block so as to enable the support member to rotate when the rack moves.

7. The rack support mechanism according to claim 6, wherein: The pressing block is provided with a receiving cavity with an opening toward the supporting member, and at least a portion of the supporting member is disposed in the receiving cavity; The pressing block is provided with a clamping slot communicating with the accommodating cavity, a notch of the clamping slot faces the supporting member, and a rotating shaft of the supporting member is rotatably connected to the clamping slot.

8. The rack support mechanism according to any one of claims 1 to 7, characterized in that: A vibration damping member is provided between the adjusting member and the pressing block.

9. The rack support mechanism according to any one of claims 1 to 7, characterized in that: Also includes: a first sealing ring, which is sleeved on the outer peripheral wall of the pressing block and is used to seal the gap between the pressing block and the housing; and / or A second sealing ring is sleeved on the outer peripheral wall of the adjusting member and is used to seal the gap between the adjusting member and the housing.

10. The rack support mechanism according to claim 9, wherein: There are multiple first sealing rings, and the multiple first sealing rings are arranged at intervals.

11. A steering gear, characterized in that: include: case; A gear and a rack, wherein the gear and the rack are both disposed in the housing, and the gear is meshed with the rack; A rack support mechanism, wherein the rack support mechanism is the rack support mechanism according to any one of claims 1 to 10, wherein the rack support mechanism is arranged on the side of the rack away from the gear, the support member abuts against the back of the rack, the external thread is threadably connected to the shell, and the locking nut abuts against the shell on the side facing the pressure block.

12. A vehicle, characterized in that: Including the diverter as claimed in claim 11.

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