Self-adaptive clearance compensation mechanism, power-assisted steering device and vehicle

Abstract

The utility model discloses a self-adaptive clearance compensation mechanism, a power-assisted steering device and a vehicle. The self-adaptive clearance compensation mechanism comprises a first transmission part, a second transmission part, a bearing, a bearing pressing block and a compensation assembly. The second transmission part is in transmission connection with the first transmission part; the bearing is fixedly connected with the first transmission part; the bearing pressing block is suitable for sleeving a bearing; the compensation assembly is suitable for abutting against the bearing pressing block so as to compensate the gap between the first transmission piece and the second transmission piece. The bearing of the first transmission part is sleeved with the bearing pressing block, the bearing pressing block bears elastic supporting of the compensation assembly, the supporting stability of the self-adaptive clearance compensation mechanism on the first transmission part is improved, the self-adaptive clearance compensation mechanism can be prevented from damaging the bearing of the first transmission part, and long-term stable and effective transmission of the transmission mechanism is guaranteed.

Description

Technical Field

[0001] The utility model generally relates to the technical field of vehicle steering systems, and more specifically to an adaptive gap compensation mechanism, a power steering device and a vehicle. Background Art

[0002] At present, electric power steering has become the mainstream product of automobile steering system, and the reduction mechanism is one of the most critical components in automobile steering system. Worm gear pair is widely used in the reduction mechanism of electric power steering system because of its compact structure and large reduction ratio.

[0003] Currently, the common electric power steering system usually adopts the combination of plastic worm wheel and metal worm. During the long-term meshing between the plastic worm wheel and the metal worm, the worm wheel will wear and increase the meshing clearance between the worm wheel and the worm. The increase in the meshing clearance causes problems such as abnormal switching noise during the driving process of the car, affecting the steering performance of the steering system.

[0004] Therefore, it is necessary to provide an adaptive clearance compensation mechanism, a power steering device and a vehicle to at least partially solve the above problems. Utility Model Content

[0005] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0006] In order to at least partially solve the above problems, the first aspect of the present invention provides an adaptive gap compensation mechanism, comprising:

[0007] a first transmission member;

[0008] a second transmission member, the second transmission member being transmission-connected to the first transmission member;

[0009] A bearing, wherein the bearing is fixedly connected to the first transmission member;

[0010] A bearing pressing block, the bearing pressing block is suitable for being sleeved on the bearing;

[0011] A compensation component, wherein the compensation component is suitable for abutting against the bearing pressure block to compensate for the gap between the first transmission member and the second transmission member.

[0012] Optionally, the bearing pressing block comprises:

[0013] The compensating component abuts against the pressing portion.

[0014] Optionally, the pressing portion includes a pressing plane arranged on the outer side surface of the bearing pressure block, and the compensation component is suitable for pressing against the pressing plane.

[0015] Optionally, the pressing portion includes a first limiting groove, and a groove bottom of the first limiting groove is configured as the pressing plane.

[0016] Optionally, the pressing portion includes a protrusion arranged on the outer side surface of the bearing pressure block, and the first limiting groove is arranged on the protrusion.

[0017] Optionally, the bearing pressing block comprises:

[0018] A limiting portion, wherein the limiting portion is used to limit the bearing.

[0019] Optionally, the bearing pressing block is provided with a first mounting hole, the first mounting hole is used for sleeve mounting the bearing, and the limiting portion is provided on the inner wall of the first mounting hole and protrudes toward the inside of the first mounting hole.

[0020] Optionally, it also includes:

[0021] The bearing, the bearing pressing block and the compensation assembly are accommodated in the housing.

[0022] Optionally, the compensation assembly includes a locking member, a gap compensation member and a first elastic member, and the locking member is relatively fixed to the housing;

[0023] Along the circumference of the compensation component, two ends of the first elastic member respectively abut against the gap compensation member and the locking member, and the first elastic member pushes the bearing pressure block through the gap compensation member to make the first transmission member move closer to the second transmission member.

[0024] Optionally, the gap compensation member includes a first protrusion extending toward the locking member, and the locking member includes a second protrusion extending toward the gap compensation member; along the circumference of the compensation component, the first protrusion and the second protrusion are circumferentially spaced, and the two ends of the first elastic member respectively abut the first protrusion and the second protrusion.

[0025] Optionally, there are multiple first elastic members.

[0026] Optionally, there are multiple first protrusions, the number of the second protrusions is equal to the number of the first protrusions, and along the circumference of the compensation component, there is one first protrusion between every two adjacent second protrusions.

[0027] Optionally, the locking member is provided with a receiving groove, and the receiving groove is used to receive at least part of the first protrusion, the second protrusion and the first elastic member.

[0028] Optionally, it is characterized in that the gap compensation member includes a first section close to the first transmission member, and the first section can move toward the first transmission member to compensate for the gap between the first transmission member and the second transmission member.

[0029] Optionally, the gap compensation member also includes a second section, which is arranged on the side of the first section away from the first transmission member and abuts against the first section, and the two ends of the first elastic member respectively abut against the second section and the locking member, and the first elastic member can drive the second section to rotate so that the first section moves toward the first transmission member.

[0030] Optionally, the first end surface of the first section facing the second section includes a first helical surface, which extends helically around the axis of the compensation component; the second end surface of the second section facing the first section includes a second helical surface, which extends helically around the axis of the compensation component.

[0031] Optionally, the first end face includes a plurality of the first helical surfaces, and the plurality of the first helical surfaces are evenly distributed along the circumference of the compensation component; the second end face includes a plurality of the second helical surfaces, and the plurality of the second helical surfaces are evenly distributed along the circumference of the compensation component.

[0032] Optionally, the heights of each of the first helical surfaces and each of the second helical surfaces extending helically around the axis of the compensation component are equal.

[0033] Optionally, along the circumference of the compensation component, the helix angle of each of the first helical surfaces and each of the second helical surfaces is less than or equal to the friction angle between the first segment and the second segment.

[0034] Optionally, the compensation assembly further includes an elastic top block, wherein the elastic top block is located between the first transmission member and the gap compensation member, and the gap compensation member pushes the first transmission member toward the second transmission member through the elastic top block.

[0035] Optionally, the elastic top block includes a top block and a second elastic member, two ends of the second elastic member respectively abut against the first section and the top block, and the top block abuts against the bearing pressure block, so that the first section can push the top block to slide through the second elastic member, and the top block pushes the bearing pressure block to push the first transmission member toward the second transmission member.

[0036] Optionally, at least one of the top block and the first section is provided with a groove, and the second elastic member is at least partially accommodated in the groove.

[0037] Optionally, the first section can move toward the top block until it contacts the top block to limit the compression amount of the second elastic member.

[0038] A second aspect of the utility model provides a power steering device, comprising a steering input device, a steering actuator, and an adaptive gap compensation mechanism described in any one of the above technical solutions, wherein the steering input device is transmission-connected to a first transmission member of the adaptive gap compensation mechanism, and the steering actuator is transmission-connected to a second transmission member of the adaptive gap compensation mechanism.

[0039] A third aspect of the utility model provides a vehicle, comprising the power steering device described in any one of the above technical solutions or the adaptive gap compensation mechanism described in any one of the above technical solutions.

[0040] According to the utility model, an adaptive gap compensation mechanism, a power steering device and a vehicle are provided with a bearing block sleeved on the bearing of the first transmission member, and the bearing block receives the elastic support of the compensation assembly, thereby improving the stability of the adaptive gap compensation mechanism supporting the first transmission member, and also preventing the adaptive gap compensation mechanism from damaging the bearing of the first transmission member, thereby ensuring long-term stable and effective transmission of the transmission mechanism. The adaptive gap compensation mechanism can realize automatic adjustment of the gap of the transmission mechanism through the compensation assembly, ensuring that the center spacing of the transmission members is always constant, ensuring effective transmission of the transmission mechanism, eliminating abnormal noise of the steering device, and ensuring normal use of the power steering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0042] Figure 1 An exploded view of a power steering device according to a preferred embodiment of the utility model;

[0043] Figure 2 is a cross-sectional view of a power steering device according to a preferred embodiment of the utility model;

[0044] Figure 3 It is a three-dimensional diagram of a bearing pressure block according to a preferred embodiment of the utility model;

[0045] Figure 4 is a cross-sectional view of a housing according to a preferred embodiment of the utility model;

[0046] Figure 5 It is an exploded view of a compensation component according to a preferred embodiment of the utility model;

[0047] Figure 6 A perspective view of the second section according to a preferred embodiment of the present utility model;

[0048] Figure 7 A perspective view of the second section according to a preferred embodiment of the present utility model;

[0049] Figure 8 It is a three-dimensional diagram of a locking member according to a preferred embodiment of the utility model;

[0050] Fig. 9 It is a three-dimensional diagram of a locking member according to a preferred embodiment of the utility model;

[0051] Fig.10 A perspective view of the first section according to a preferred embodiment of the present utility model;

[0052] Fig.11 A perspective view of the first section according to a preferred embodiment of the present utility model;

[0053] Fig.12 It is a cross-sectional view of a compensation component according to a preferred embodiment of the utility model.

[0054] Description of reference numerals:

[0055] 1: First transmission part 2: Bearing

[0056] 3: Bearing block 301: Body

[0057] 302: Limiting part 303: Pressing part

[0058] 304: first mounting hole 305: first limiting groove

[0059] 4: Bearing seat 41: Second mounting hole

[0060] 5: Shell 51: Body

[0061] 52: Third mounting hole 53: Fourth mounting hole

[0062] 6: First elastic member 7: Locking member

[0063] 701: Main body 702: Second raised part

[0064] 703: receiving groove 704: first guide surface

[0065] 705: The third pressure-bearing surface 706: Wrench

[0066] 8: Top block 9: Fifth elastic member

[0067] 10: fourth elastic member 11: second elastic member

[0068] 12: The first paragraph 1201: The main body

[0069] 1202: Sixth pressure-bearing surface 1203: First helical surface

[0070] 1204: second adjustment hole 1205: seventh pressure-bearing surface

[0071] 1206: The eighth pressure surface 13: The second section

[0072] 1301: Main body 1302: Fourth pressure-bearing surface

[0073] 1303: first protrusion 1304: fifth pressure-bearing surface

[0074] 1305: second guide surface 1306: second helical surface

[0075] 1307: first adjustment hole 14: third elastic member

[0076] 15: Second transmission member 16: Clearance compensation member

[0077] 100: Compensation components DETAILED DESCRIPTION

[0078] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0079] In order to thoroughly understand the utility model, a detailed description will be provided in the following description. It should be understood that these embodiments are provided to make the disclosure of the utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the utility model is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the utility model are described in detail below, but in addition to these detailed descriptions, the utility model may also have other embodiments.

[0080] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0081] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in the present invention are for illustrative purposes only and are not restrictive.

[0082] The utility model discloses an adaptive gap compensation mechanism, a power steering device and a vehicle.

[0083] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

[0084] like Figure 1 , Figure 2 , Figure 3 As shown, in a preferred embodiment, an adaptive clearance compensation mechanism includes: a first transmission member 1, a second transmission member 15, a bearing 2, a bearing pressure block 3 and a compensation assembly 100;

[0085] The first transmission member 1 may be a worm, a lead screw or the like, and is a worm in the figure;

[0086] The second transmission member 15 is in transmission connection with the first transmission member 1. The second transmission member 15 may be a transmission member of a worm gear, a nut, a gear, etc., and is a worm gear in the figure;

[0087] The second transmission member 15 meshes with the first transmission member 1 to form a transmission mechanism, such as a worm gear pair; the second transmission member 15 rotates under the drive of the first transmission member 1 for power steering, such as for automatic driving of a car;

[0088] The bearing 2 is fixedly connected to the first transmission member 1, and the bearing 2 can be fixedly connected to the first end of the worm, for example, by interference connection;

[0089] The bearing pressing block 3 is suitable for being sleeved on the bearing 2, which is equivalent to the bearing pressing block 3 wrapping the bearing 2. The bearing pressing block 3 and the bearing 2 can be interference fit or transition fit to keep relatively fixed;

[0090] The compensation assembly 100 is suitable for abutting against the bearing pressure block 3 to compensate for the gap between the first transmission member 1 and the second transmission member 15 .

[0091] The compensation assembly 100 is in contact with the bearing block 3 and can elastically support the bearing block 3 along a first direction. The first direction in the figure is the Z-axis direction.

[0092] The adaptive clearance compensation mechanism in this embodiment is configured such that the bearing of the first transmission member is sleeved by a bearing pressure block, and the bearing pressure block bears the elastic support of the compensation component, thereby improving the stability of the adaptive clearance compensation mechanism in supporting the first transmission member, and can also prevent the adaptive clearance compensation mechanism from damaging the bearing of the first transmission member, thereby ensuring long-term stable and effective transmission of the transmission mechanism, such as a worm gear pair.

[0093] In one embodiment, a self-aligning bearing may be provided at the second end of the first transmission member 1 to accommodate axial angle changes of the first transmission member 1 .

[0094] In one embodiment, the bearing 2 can be a ball bearing, including an inner ring, an outer ring, balls, a cage and other components, and the specific structure can refer to the prior art. The first end of the first transmission member 1 is mounted on the inner ring of the bearing 2 and is kept relatively fixed by interference fit, and the outer ring of the bearing 2 and the bearing block 3 can be kept relatively fixed by interference fit or transition fit.

[0095] In one embodiment, if Figure 2 , Figure 3 As shown, the bearing pressing block 3 comprises:

[0096] The compensating assembly 100 presses against the pressing portion 303 to form an elastic supporting relationship corresponding to the bearing pressing block 3 .

[0097] The bearing pressing block 3 further comprises a main body 301 , which is cylindrical, and a pressing portion 303 which is platform-shaped. The pressing portion 303 is fixedly connected to the main body 301 , and the main body 301 and the pressing portion 303 may be integrally made.

[0098] In one embodiment, if Figure 2 , Figure 3 As shown, the pressing portion 303 includes a pressing plane disposed on the outer side of the bearing pressure block 3, and the compensation assembly 100 is suitable for abutting the pressing plane. The pressing plane can be disposed at the top of the pressing portion 303, and the pressing plane is conducive to forming a stable support structure with the compensation assembly 100 and dispersing the pressure.

[0099] In one embodiment, if Figure 2 , Figure 3 As shown, the pressing portion 303 includes a first limiting groove 305, and the bottom of the first limiting groove 305 is configured as a pressing plane. The first limiting groove 305 can be arranged at the top of the pressing portion 303, and the end of the compensation component 100 (specifically, the end of the top block 8) enters the first limiting groove 305 and will not move in the pressing plane of the pressing portion 303, which is more conducive to forming a stable support structure with the compensation component 100.

[0100] In one embodiment, if Figure 2 , Figure 3 As shown, the pressing portion 303 includes a protrusion disposed on the outer side of the bearing pressing block 3, and the first limiting groove 305 is disposed on the protrusion. The length of the protrusion is not greater than the outer diameter of the body 301, the width of the protrusion is not greater than the axial length of the body 301, the protrusion and the body 301 can be made in one piece, and the first limiting groove 305 can be disposed on the top of the protrusion.

[0101] In one embodiment, if Figure 3 As shown, the bearing pressing block 3 also includes:

[0102] The limiting part 302 is used to limit the position of the bearing 2. The bearing 2 is arranged inside the bearing block 3 and is supported by the limiting part 302 so that it will not fall from the inside of the bearing block 3, thereby ensuring that the bearing 2 is stably connected to the bearing block 3. The limiting part 302 and the body 301 can be made in one piece.

[0103] In one embodiment, if Figure 2 , Figure 3 As shown, the bearing pressing block 3 is provided with a first mounting hole 304 , the first mounting hole 304 is used for sleeve mounting the bearing 2 , and the limiting portion 302 is provided on the inner wall of the first mounting hole 304 and protrudes toward the inside of the first mounting hole 304 .

[0104] The first mounting hole 304 is arranged inside the main body 301, and the first mounting hole 304 is used to accommodate the bearing 2 of the first transmission member 1; the first mounting hole 304 is a round hole, which is adapted to the bearing 2, and the inner diameter of the first mounting hole 304 can be equal to or slightly smaller than the outer diameter of the bearing 2, and the bearing 2 is installed in the first mounting hole 304 and cannot shake.

[0105] The limiting portion 302 is disposed at one end of the first mounting hole 304, and the limiting portion 302 protrudes radially inwardly of the body 301, and is used to limit the bearing 2. The bearing 2 is disposed inside the first mounting hole 304, and is supported by the limiting portion 302 so as not to fall out of the first mounting hole 304.

[0106] In one embodiment, if Figure 1 , Figure 2 As shown, the adaptive gap compensation mechanism also includes:

[0107] The housing 5, the bearing 2, the bearing pressing block 3 and the compensation assembly 100 are accommodated in the housing 5. The housing 5 is the installation base of the bearing 2, the bearing pressing block 3 and the compensation assembly 100, and the first end of the first transmission member 1 can extend into the interior of the housing 5 to connect with the bearing 2, thereby realizing the connection combination between the first transmission member 1, the bearing pressing block 3 and the compensation assembly 100.

[0108] In one embodiment, if Figure 2 As shown, the adaptive gap compensation mechanism also includes:

[0109] The bearing seat 4 is provided with a second mounting hole 41 , and the bearing pressing block 3 is arranged in the second mounting hole 41 . The bearing pressing block 3 can move along the first direction in the second mounting hole 41 .

[0110] The second mounting hole 41 can be an elliptical hole, whose major axis is in the same direction as the first direction, and the length of the major axis is greater than the diameter of the main body 301 of the bearing block 3. The bearing block 3 can move along the first direction in the second mounting hole 41 to facilitate adjustment of the position of the first transmission member 1. As the first transmission member 1 or the second transmission member 15 wears, the bearing block 3 gradually moves along the first direction in the second mounting hole 41 to eliminate the meshing clearance between the first transmission member 1 and the second transmission member 15.

[0111] In one embodiment, if Figure 1 , Figure 2 As shown, the compensation assembly 100 includes a locking member 7 , a gap compensation member 16 and a first elastic member 6 , and the locking member 7 is relatively fixed to the housing 5 .

[0112] The first elastic member 6 elastically pushes the gap compensating member 16 , so that the axial length of the gap compensating member 16 gradually extends, and the axial length of the gap compensating member 16 is in the same direction as the first direction.

[0113] The first elastic member 6 is a driving device for changing the axial length of the gap compensating member 16. Since the axial length of the gap compensating member 16 is adjustable, when the transmission mechanism gap increases to the point where the second elastic member 11 cannot effectively support the first transmission member 1, a variation margin is left for the axial length of the gap compensating member 16. The first elastic member 6 will adaptively drive the gap compensating member 16 to increase its axial length and compensate for the transmission mechanism gap.

[0114] In one embodiment, if Figure 2 , Figure 4 As shown, a third mounting hole 52 and a fourth mounting hole 53 are provided in the shell 5, the third mounting hole 52 and the fourth mounting hole 53 are connected, the axial directions of the third mounting hole 52 and the fourth mounting hole 53 are perpendicular to each other, the axial direction of the third mounting hole 52 is in the same direction as the first direction, the axial direction of the fourth mounting hole 53 is in the same direction as the axial direction of the first transmission member 1, the compensation assembly 100 is provided in the third mounting hole 52, and the bearing seat 4 is provided in the fourth mounting hole 53.

[0115] The third mounting hole 52 is provided with an internal thread, and the outer ring of the locking member 7 is provided with an external thread. The locking member 7 is detachably fixed in the third mounting hole 52 to limit the gap compensation member 16 along the first direction. The inner diameters of the third mounting hole 52 and the fourth mounting hole 53 are equal to or slightly smaller than the outer diameter of the bearing seat 4, and the bearing seat 4 is installed in the fourth mounting hole 53 and cannot shake.

[0116] In one embodiment, if Figure 2 , Figure 5 As shown, along the circumference of the compensation assembly 100 , the two ends of the first elastic member 6 respectively abut against the gap compensation member 16 and the locking member 7 , and the first elastic member 6 pushes the bearing pressure block 3 through the gap compensation member 16 to make the first transmission member 1 move closer to the second transmission member 15 .

[0117] In one embodiment, the first elastic member 6 is a cylindrical spring, and the axial direction of the first elastic member 6 is arranged along the circumferential direction of the compensation component 100. In the compensation component 100, the first elastic member 6 is in a compressed state, and is also in a bent state around the Z axis, and its elastic force can continuously act on the gap compensation member 16. When the first elastic member 6 gradually stretches, the bearing pressing block 3 is pushed through the gap compensation member 16 to make the first transmission member 1 move closer to the second transmission member 15, ensuring that the center distance between the second transmission member 15 and the first transmission member 1 is always constant.

[0118] like Figure 8 , Fig. 9 As shown, the locking member 7 includes a body 701, which is cylindrical, and an external thread can be provided on the outer circumferential surface of the body 701, and an internal thread is provided in the third mounting hole 52 of the housing 5. The body 701 is threadedly connected with the third mounting hole 52 of the housing 5, and the position in the third mounting hole 52 can be adjusted to limit the gap compensation member 16 along the first direction. A wrench 706 is also provided on the top of the body 701 for rotating the locking member 7.

[0119] In one embodiment, if Figure 6 , Figure 7 , Fig. 9 As shown, the gap compensation member 16 includes a first protrusion 1303 extending toward the locking member 7, and the locking member 7 includes a second protrusion 702 extending toward the gap compensation member 16; along the circumference of the compensation component 100, the first protrusion 1303 and the second protrusion 702 are circumferentially spaced, and the two ends of the first elastic member 6 respectively abut the first protrusion 1303 and the second protrusion 702.

[0120] like Figure 5 , Figure 6 , Figure 7 As shown, the second section 13 includes a body 1301, which is disc-shaped and is convenient for rotation in the installation position; the first protrusion 1303 is arranged on the first end surface of the body 1301 and protrudes along the first direction.

[0121] like Figure 5 , Figure 6 As shown, a fifth pressure-bearing surface 1304 is provided on the first side of the first protrusion 1303, and the fifth pressure-bearing surface 1304 is elastically connected to the first end of the first elastic member 6. A second guide surface 1305 is provided on the second side of the first protrusion 1303, and the second guide surface 1305 is an inclined surface.

[0122] The fifth pressure-bearing surface 1304 is a vertical surface, and the first end of the first elastic member 6 can stably push the fifth pressure-bearing surface 1304. The second guide surface 1305 is provided for cooperation with the locking member 7, so that the first protrusion 1303 can gradually slide into the receiving groove 703 of the locking member 7 while compressing the first elastic member 6 (corresponding to the second guide surface 1305, the second end of the receiving groove 703 is provided with a first guide surface 704, and the first guide surface 704 is an inclined surface).

[0123] like Fig. 9 As shown, the second protrusion 702 is arranged at the inner top of the locking member 7, and the second protrusion 702 is elastically connected to the second end of the first elastic member 6. The second protrusion 702 is also provided with a vertical surface, and the second end of the first elastic member 6 can stably push the vertical surface of the second protrusion 702.

[0124] In one embodiment, there are multiple first elastic members 6. By providing multiple first elastic members 6, the thrust force on the gap compensation member 16 is larger and more uniform, ensuring that the compensation assembly 100 can work reliably.

[0125] In one embodiment, the number of the first protrusions 1303 is multiple, the number of the second protrusions 702 is equal to the number of the first protrusions 1303, and along the circumference of the compensation component 100, there is one first protrusion 1303 between every two adjacent second protrusions 702. Because the first elastic member 6 is provided in multiple numbers, the corresponding first protrusions 1303 and second protrusions 702 are also provided in multiple numbers, and they are respectively abutted one by one.

[0126] In one embodiment, if Figure 2 , Fig. 9 As shown, the locking member 7 is provided with a receiving groove 703 , and the receiving groove 703 is used to receive at least part of the first protrusion 1303 , the second protrusion 702 and the first elastic member 6 .

[0127] The top of the body 701 of the locking member 7 is provided with a top plate, and the receiving groove 703 is provided on the top plate. The first elastic member 6 is provided in the receiving groove 703 , the first protrusion 1303 extends into the receiving groove 703 , and the second protrusion 702 is located at the first end of the receiving groove 703 .

[0128] In one embodiment, if Figure 1 , Figure 2 As shown, the gap compensation member 16 includes a first section 12 close to the first transmission member 1 , and the first section 12 can move toward the first transmission member 1 to compensate for the gap between the first transmission member 1 and the second transmission member 15 .

[0129] Under the action of the first elastic member 6, the first section 12 can move along the first direction toward the first transmission member 1, so that the first transmission member 1 moves toward the second transmission member 15, ensuring that the center distance between the second transmission member 15 and the first transmission member 1 is always constant.

[0130] In one embodiment, if Figure 1 , Figure 2 As shown, the gap compensation member 16 also includes a second section 13, which is arranged on the side of the first section 12 away from the first transmission member 1 and abuts against the first section 12. The two ends of the first elastic member 6 respectively abut the second section 13 and the locking member 7. The first elastic member 6 can drive the second section 13 to rotate, so that the first section 12 moves toward the first transmission member 1.

[0131] The first section 12 is slidably connected to the second section 13. Under the elastic pushing action of the first elastic member 6, the second section 13 and the first section 12 can rotate and slide relative to each other. The distance between the first section 12 and the second section 13 along the first direction gradually increases, so that the axial length of the gap compensation member 16 gradually extends.

[0132] The second section 13 and the first section 12 are overlapped along the first direction. Driven by the first elastic member 6, the second section 13 and the first section 12 can rotate and slide relative to each other to increase the distance between them. The second section 13 actually rotates, and the axial length of the gap compensation member 16 will gradually extend.

[0133] After the transmission mechanism has been used for a period of time, if the transmission mechanism clearance increases to the point where the second elastic member 11 cannot effectively support the first transmission member 1, for example, the elastic deformation performance of the second elastic member 11 decreases and becomes loose, the transmission mechanism clearance cannot be eliminated, affecting the normal use of the power steering device. Because the first section 12 moves toward the first transmission member 1, the length of the compensation component 100 increases, and the increased length just compensates for the transmission mechanism clearance, so that the compensation component 100 maintains effective support for the first transmission member 1, ensuring that the center distance between the second transmission member 15 and the first transmission member 1 is always constant.

[0134] In one embodiment, if Figure 1 , Figure 2 As shown, the first end surface of the first section 12 facing the second section 13 includes a first helical surface 1203, which extends helically around the axis of the compensation component 100; the second end surface of the second section 13 facing the first section 12 includes a second helical surface 1306, which extends helically around the axis of the compensation component 100.

[0135] like Figure 6 , Figure 7As shown, the second section 13 includes a body 1301, which is disc-shaped and convenient for rotation in the installation position; the second helical surface 1306 is arranged on the second end surface of the body 1301 and protrudes along the first direction, and the second helical surface 1306 can be slidably connected with the first section 12.

[0136] The second spiral surface 1306 is a wedge-shaped inclined surface, which has a highest point and a lowest point, and the height of the wedge-shaped inclined surface changes gradually and naturally.

[0137] A fourth pressure-bearing surface 1302 is disposed on the top of the main body 1301 . The fourth pressure-bearing surface 1302 is used to abut against the third elastic member 14 .

[0138] The first protrusion 1303 , the second helical surface 1306 and the body 1301 may be integrally manufactured, for example, the second section 13 may be manufactured by injection molding.

[0139] like Fig.10 , Fig.11 As shown, the first section 12 includes a body 1201, which is disc-shaped and adapted to the installation position; a first helical surface 1203 is arranged on the first end surface of the body 1201 and protrudes along the first direction, and the first helical surface 1203 is slidably connected to the second helical surface 1306.

[0140] The first helical surface 1203 is a wedge-shaped slope, which has a highest point and a lowest point, and the height of the wedge-shaped slope changes gradually and naturally. The wedge-shaped slope of the first helical surface 1203 has the same shape as the wedge-shaped slope of the second helical surface 1306, for example, the height and length are the same.

[0141] The first spiral surface 1203 and the body 1201 may be manufactured in one piece, for example, by injection molding the first section 12 .

[0142] Under the elastic pushing action of the first elastic member 6 , the second helical surface 1306 and the first helical surface 1203 can rotate and slide relative to each other, and the distance between the first section 12 and the second section 13 along the first direction gradually increases, so that the axial length of the gap compensation member 16 gradually extends.

[0143] A sixth pressure-bearing surface 1202 is also provided at the top of the main body 1201, and the sixth pressure-bearing surface 1202 is used to abut the locking member 7. A seventh pressure-bearing surface 1205 and an eighth pressure-bearing surface 1206 are provided at the bottom of the main body 1201, and the seventh pressure-bearing surface 1205 is used to abut the top block 8, and the eighth pressure-bearing surface 1206 is used to abut the first end of the second elastic member 11.

[0144] In one embodiment, if Figure 7 , Fig.10As shown, the first end face of the first section 12 includes a plurality of first helical surfaces 1203 , which are evenly distributed along the circumference of the compensation component 100 ; the second end face of the second section 13 includes a plurality of second helical surfaces 1306 , which are evenly distributed along the circumference of the compensation component 100 .

[0145] In the figure, the first end surface of the first section 12 includes three first helical surfaces 1203, and the second end surface of the second section 13 includes three second helical surfaces 1306. Other numbers can be set according to design requirements.

[0146] By providing a plurality of first helical surfaces 1203 and a plurality of second helical surfaces 1306 , the first section 12 and the second section 13 can support each other in a balanced manner, which is beneficial for reliable adjustment of the axial distance between the first section 12 and the second section 13 .

[0147] A plurality of first helical surfaces 1203 are connected in sequence to form a ring, wherein the highest point of any first helical surface 1203 is connected to the lowest point of an adjacent first helical surface 1203. A plurality of second helical surfaces 1306 are connected in sequence to form a ring, wherein the highest point of any second helical surface 1306 is connected to the lowest point of an adjacent second helical surface 1306.

[0148] In one embodiment, each first helical surface 1203 and each second helical surface 1306 have the same height of spiral extension around the axis of the compensation component 100. This arrangement ensures that the axial distance between the first section 12 and the second section 13 is stably adjusted.

[0149] In one embodiment, along the circumference of the compensation component 100, the helix angles of each first helical surface 1203 and each second helical surface 1306 are all less than or equal to the friction angle between the first section 12 and the second section 13. This arrangement can prevent the first section 12 and the second section 13 from exceeding the maximum limit during the misaligned rotation, that is, prevent the highest points of the first helical surface 1203 and the second helical surface 1306 from crossing each other. When the maximum limit is exceeded, the axial distance between the first section 12 and the second section 13 will suddenly change from the maximum to the minimum, resulting in compensation failure.

[0150] In one embodiment, if Figure 2 , Fig.12 As shown, the compensation assembly 100 further includes an elastic top block, which is located between the first transmission member 1 and the gap compensation member 16. The gap compensation member 16 pushes the first transmission member 1 toward the second transmission member 15 through the elastic top block.

[0151] The elastic top block is the main elastic support device for the first transmission member 1. After a period of use, if the transmission mechanism clearance increases to the point where the elastic top block cannot effectively support the first transmission member 1, for example, the elastic deformation performance of the elastic top block decreases and becomes loose, the transmission mechanism clearance cannot be eliminated, affecting the normal use of the power steering device. Because the clearance compensation member 16 can automatically increase in length, the increased length can just compensate for the transmission mechanism clearance, so that the elastic top block maintains effective support for the first transmission member 1, ensuring that the center distance between the second transmission member 15 and the first transmission member 1 is always constant.

[0152] In one embodiment, if Figure 2 , Fig.12 As shown, the elastic top block includes a top block 8 and a second elastic member 11, the two ends of the second elastic member 11 are respectively abutted against the first section 12 and the top block 8, and the top block 8 is abutted against the bearing pressure block 3, so that the first section 12 can push the top block 8 to slide through the second elastic member 11, and the top block 8 pushes the bearing pressure block 3 to push the first transmission member 1 toward the second transmission member 15.

[0153] The top block 8 can slide in the third mounting hole 52 of the housing 5 along the first direction and maintain an abutting relationship with the bearing pressing block 3 .

[0154] The second elastic member 11 can be a wave spring, a butterfly spring, or a cylindrical spring, and the axial direction of the second elastic member 11 is the same as the first direction. The second elastic member 11 can also be made of other elastic materials, such as rubber or plastic.

[0155] The second elastic member 11 in the figure is a cylindrical spring, the first end of which is elastically connected to the gap compensation member 16, and the second end of which is elastically connected to the top block 8. The cylindrical spring is the main elastic support device for the first transmission member 1. After a period of use, if the transmission mechanism gap increases to the point where the cylindrical spring cannot effectively support the first transmission member 1, for example, the elastic deformation performance of the second elastic member 11 decreases and becomes loose, the transmission mechanism gap cannot be eliminated, affecting the normal use of the power steering device. Because the gap compensation member 16 can automatically increase its length, the increased length can just compensate for the relaxation and deformation of the cylindrical spring, so that the elastic top block can maintain effective support for the first transmission member 1, ensuring that the center distance between the second transmission member 15 and the first transmission member 1 is always constant.

[0156] In one embodiment, if Figure 2 , Fig.12 As shown, at least one of the top block 8 and the first section 12 is provided with a groove, and the second elastic member 11 is at least partially received in the groove. The groove can limit the position of the second elastic member 11 and can also keep the second elastic member 11 from being skewed.

[0157] In one embodiment, if Figure 2 Fig.12 As shown, the first section 12 can move toward the top block 8 until it contacts the top block 8 to limit the compression of the second elastic member 11. When the first section 12 contacts the top block 8, the second elastic member 11 reaches the maximum compression, and when the first section 12 does not contact the top block 8, the compression of the second elastic member 11 is variable.

[0158] In one embodiment, if Fig.12 As shown, the adaptive gap compensation mechanism also includes:

[0159] The third elastic member 14 is disposed between the locking member 7 and the clearance compensation member 16. The third elastic member 14 can be a rubber ring, which is used to maintain a constant backlash between the second transmission member 15 and the first transmission member 1 at the initial moment, and is also used for impact buffering under high load conditions.

[0160] In order to prevent the clamping force on the transmission mechanism from increasing continuously after long-term operation, thereby preventing jamming or blocking, the third elastic member 14 has a certain compression reserve at the initial installation stage. When the clamping force on the transmission mechanism increases to the point where the transmission mechanism is about to get stuck, the clamping force is transmitted to the second section 13, and the second section 13 compresses the third elastic member 14, thereby preventing the transmission mechanism from getting stuck.

[0161] In one embodiment, if Fig.12 As shown, the adaptive gap compensation mechanism also includes:

[0162] The fourth elastic member 10 is disposed between the gap compensation member 16 and the top block 8. The fourth elastic member 10 can be a rubber ring, and the fourth elastic member 10 can play a buffering role between the first section 12 and the top block 8, and can also appropriately increase the friction between the first section 12 and the top block 8 to prevent the first section 12 from rotating with the second section 13.

[0163] In one embodiment, if Fig.12 As shown, the adaptive gap compensation mechanism also includes:

[0164] The fifth elastic member 9 is arranged on the outer side of the top block 8. A plurality of fifth elastic members 9 can be provided, and the fifth elastic member 9 can be a rubber ring. The outer side of the top block 8 can be provided with an installation groove for installing the fifth elastic member 9.

[0165] Description of the working principle of the adaptive gap compensation mechanism:

[0166] The second section 13 and the first section 12 are two gap compensation blocks. At the initial moment, the annular wedge-shaped inclined surfaces of the second section 13 and the first section 12 cooperate and are adjusted to the minimum axial distance.

[0167] By adjusting the two gap compensation blocks to the minimum stroke at the initial moment, the compression of the first elastic member 6 can be adjusted by adjusting the screwing depth of the locking member 7. When the third elastic member 14 begins to compress, the remaining compression is the initial meshing backlash. When the steering gear transmission mechanism is not worn, the two sets of annular wedge-shaped slopes maintain a stable overall movement trend of the product according to the designed friction force, and the whole maintains dynamic balance. When the transmission mechanism begins to wear, the meshing gap between the second transmission member 15 and the first transmission member 1 increases, and the second elastic member 11 generates a downward force acting on the top block 8. The top block 8 further transmits the force to the bearing pressure block 3, and the bearing pressure block 3 eventually transmits the force to the bearing 2. The steady state of the two gap compensation blocks is broken and is no longer dynamically balanced. At this time, the first elastic member 6 starts to push the second section 13 to rotate. Accordingly, the first section 12 remains stationary due to the pressure of the locking member 7 or the friction between other components (it can also be regarded as the first section 12 rotating in the opposite direction relative to the second section 13). At this time, the axial stroke of the two clearance compensation blocks begins to increase. This increased stroke is the stroke of the increased meshing clearance of the transmission mechanism. When the first section 12 contacts the top block 8, a new steady state is reached.

[0168] In order to prevent the clamping force on the transmission mechanism from increasing continuously after long-term operation, thereby preventing jamming or blocking, the third elastic member 14 has a certain compression reserve at the initial stage of installation. When the clamping force on the transmission mechanism increases to the point where the transmission mechanism is about to get stuck, the clamping force is transmitted to the second section 13, and the second section 13 compresses the third elastic member 14, thereby preventing the transmission mechanism from getting stuck.

[0169] An embodiment of the utility model also provides a power steering device, including a steering input device, a steering actuator, and an adaptive gap compensation mechanism of any one of the above embodiments, wherein the steering input device is transmission-connected to a first transmission member 1 of the adaptive gap compensation mechanism, and the steering actuator is transmission-connected to a second transmission member 15 of the adaptive gap compensation mechanism.

[0170] An embodiment of the utility model further provides a vehicle, comprising the power steering device of any one of the above embodiments or the adaptive clearance compensation mechanism of any one of the above embodiments.

[0171] The utility model provides an adaptive gap compensation mechanism, a power steering device and a vehicle, which have the following characteristics:

[0172] The bearing block can wrap the bearing of the worm and bear the elastic support of the compensation component, thereby improving the stability of the adaptive clearance compensation mechanism supporting the worm. It can also prevent the adaptive clearance compensation mechanism from damaging the bearing of the first transmission component, thereby ensuring long-term stable and effective transmission of the transmission mechanism such as the worm gear pair.

[0173] The adaptive clearance compensation mechanism can realize automatic adjustment of the clearance of the transmission mechanism through the compensation component, ensure that the center distance of the transmission parts is always constant, ensure the effective transmission of the transmission mechanism, eliminate abnormal noise of the steering device, and ensure the normal use of the power steering device.

[0174] The present invention has relatively low requirements on the assembly accuracy of each component, and can reduce the sensitivity of the gap adjustment during the primary assembly.

[0175] The processes and steps described in all the above preferred embodiments are only examples. Unless adverse effects occur, various processing operations can be performed in a sequence different from the sequence of the above processes. The sequence of steps in the above processes can also be increased, merged or deleted according to actual needs.

[0176] In understanding the scope of the present invention, the term "comprising" and its derivatives as used herein are intended to be open terms, which specify the existence of the recorded features, elements, components, groups, wholes and / or steps, but do not exclude the existence of other unrecorded features, elements, components, groups, wholes and / or steps. This concept also applies to words with similar meanings, such as the terms "including", "having" and their derivatives.

[0177] The terms "attached" or "attached" as used herein include: a configuration where an element is directly secured to another element by directly securing the element to the other element; a configuration where an element is indirectly secured to another element by securing the element to an intermediate member which in turn is secured to the other element; and a configuration where one element is integral with the other element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "fix," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent the amount of deviation that modifies the term such that the end result will not be significantly changed.

[0178] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. The features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0179] The utility model has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model.

Claims

1. An adaptive gap compensation mechanism, characterized in that: include: A first transmission member (1); A second transmission member (15), the second transmission member (15) being transmission-connected to the first transmission member (1); A bearing (2), the bearing (2) being fixedly connected to the first transmission member (1); A bearing pressing block (3), wherein the bearing pressing block (3) is suitable for being sleeved on the bearing (2); A compensation component (100), wherein the compensation component (100) is suitable for abutting against the bearing pressure block (3) to compensate for the gap between the first transmission member (1) and the second transmission member (15).

2. The adaptive gap compensation mechanism according to claim 1, characterized in that: The bearing pressing block (3) comprises: A pressing portion (303), the compensating component (100) pressing against the pressing portion (303).

3. The adaptive gap compensation mechanism according to claim 2, characterized in that: The pressing portion (303) comprises a pressing plane arranged on the outer side surface of the bearing pressure block (3), and the compensation component (100) is suitable for pressing against the pressing plane.

4. The adaptive gap compensation mechanism according to claim 3, characterized in that: The pressing portion (303) comprises a first limiting groove (305), and the bottom of the first limiting groove (305) is configured as the pressing plane.

5. The adaptive gap compensation mechanism according to claim 4, characterized in that: The pressing portion (303) comprises a protrusion arranged on the outer side surface of the bearing pressing block (3), and the first limiting groove (305) is arranged on the protrusion.

6. The adaptive gap compensation mechanism according to claim 1, characterized in that: The bearing pressing block (3) comprises: A limiting portion (302), the limiting portion (302) being used to limit the bearing (2).

7. The adaptive gap compensation mechanism according to claim 6, characterized in that: The bearing pressing block (3) is provided with a first mounting hole (304), the first mounting hole (304) is used for sleeve-mounting the bearing (2), and the limiting portion (302) is provided on the inner wall of the first mounting hole (304) and protrudes toward the inside of the first mounting hole (304).

8. The adaptive gap compensation mechanism according to claim 1, characterized in that: Also includes: A housing (5), wherein the bearing (2), the bearing pressure block (3) and the compensation assembly (100) are accommodated in the housing (5).

9. The adaptive gap compensation mechanism according to claim 8, characterized in that: The compensation assembly (100) comprises a locking member (7), a gap compensation member (16) and a first elastic member (6); the locking member (7) is relatively fixed to the housing (5); Along the circumference of the compensation component (100), the two ends of the first elastic member (6) respectively abut against the gap compensation member (16) and the locking member (7), and the first elastic member (6) pushes the bearing pressure block (3) through the gap compensation member (16) to make the first transmission member (1) move closer to the second transmission member (15).

10. The adaptive gap compensation mechanism according to claim 9, characterized in that: The gap compensating member (16) comprises a first protruding portion (1303) extending toward the locking member (7), and the locking member (7) comprises a second protruding portion (702) extending toward the gap compensating member (16); Along the circumference of the compensation component (100), the first protrusion (1303) and the second protrusion (702) are circumferentially spaced apart, and two ends of the first elastic member (6) respectively abut against the first protrusion (1303) and the second protrusion (702).

11. The adaptive gap compensation mechanism according to claim 10, characterized in that: The number of the first elastic members (6) is plural.

12. The adaptive gap compensation mechanism according to claim 11, characterized in that: The number of the first protrusions (1303) is multiple, the number of the second protrusions (702) is equal to the number of the first protrusions (1303), and along the circumference of the compensation component (100), one first protrusion (1303) is provided between every two adjacent second protrusions (702).

13. The adaptive gap compensation mechanism according to claim 12, characterized in that: The locking member (7) is provided with a receiving groove (703), and the receiving groove (703) is used to receive at least part of the first protruding portion (1303), the second protruding portion (702) and the first elastic member (6).

14. The adaptive gap compensation mechanism according to any one of claims 9 to 13, characterized in that: The gap compensating member (16) comprises a first section (12) close to the first transmission member (1), and the first section (12) can move toward the first transmission member (1) to compensate for the gap between the first transmission member (1) and the second transmission member (15).

15. The adaptive gap compensation mechanism according to claim 14, characterized in that: The gap compensation member (16) further comprises a second section (13), wherein the second section (13) is arranged on a side of the first section (12) away from the first transmission member (1) and abuts against the first section (12), and the two ends of the first elastic member (6) respectively abut against the second section (13) and the locking member (7), and the first elastic member (6) can drive the second section (13) to rotate, so that the first section (12) moves toward the first transmission member (1).

16. The adaptive gap compensation mechanism according to claim 15, characterized in that: The first end surface of the first section (12) facing the second section (13) includes a first helical surface (1203), and the first helical surface (1203) extends helically around the axis of the compensation component (100); the second end surface of the second section (13) facing the first section (12) includes a second helical surface (1306), and the second helical surface (1306) extends helically around the axis of the compensation component (100).

17. The adaptive gap compensation mechanism according to claim 16, characterized in that: The first end face includes a plurality of first helical surfaces (1203), and the plurality of first helical surfaces (1203) are evenly distributed along the circumference of the compensation component (100); the second end face includes a plurality of second helical surfaces (1306), and the plurality of second helical surfaces (1306) are evenly distributed along the circumference of the compensation component (100).

18. The adaptive gap compensation mechanism according to claim 17, characterized in that: The heights of each of the first helical surfaces (1203) and each of the second helical surfaces (1306) extending helically around the axis of the compensation component (100) are equal.

19. The adaptive gap compensation mechanism according to claim 17, characterized in that: Along the circumference of the compensation component (100), the helix angles of each of the first helical surfaces (1203) and each of the second helical surfaces (1306) are less than or equal to the friction angle between the first section (12) and the second section (13).

20. The adaptive gap compensation mechanism according to claim 14, characterized in that: The compensation assembly (100) further comprises an elastic top block, wherein the elastic top block is located between the first transmission member (1) and the gap compensation member (16), and the gap compensation member (16) pushes the first transmission member (1) toward the second transmission member (15) via the elastic top block.

21. The adaptive gap compensation mechanism according to claim 20, characterized in that: The elastic top block comprises a top block (8) and a second elastic member (11), the two ends of the second elastic member (11) respectively abut against the first section (12) and the top block (8), and the top block (8) abuts against the bearing pressure block (3), so that the first section (12) can push the top block (8) to slide through the second elastic member (11), and the top block (8) pushes the bearing pressure block (3) to push the first transmission member (1) toward the second transmission member (15).

22. The adaptive gap compensation mechanism according to claim 21, characterized in that: At least one of the top block (8) and the first section (12) is provided with a groove, and the second elastic member (11) is at least partially accommodated in the groove.

23. The adaptive gap compensation mechanism according to claim 22, characterized in that: The first section (12) is capable of moving toward the top block (8) until it contacts the top block (8) to limit the compression amount of the second elastic member (11).

24. A power steering device, characterized in that: It comprises a steering input device, a steering actuator, and an adaptive gap compensation mechanism as described in any one of claims 1 to 23, wherein the steering input device is transmission-connected to a first transmission member (1) of the adaptive gap compensation mechanism, and the steering actuator is transmission-connected to a second transmission member (15) of the adaptive gap compensation mechanism.

25. A vehicle, characterized in that: It comprises the power steering device as claimed in claim 24 or the adaptive clearance compensation mechanism as claimed in any one of claims 1-23.

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