An adjustable linkage device and vehicle

Abstract

The present application relates to the technical fields of vehicle engineering, and relates to an adjustable connecting rod device and a vehicle, the adjustable connecting rod device comprising: a first rod assembly comprising a first connecting rod unit and a first adjusting unit; the first adjusting unit comprising a first adjusting rod, a second adjusting rod, a first threaded portion and a first locking portion; one end of the first adjusting rod being connected with the first connecting rod unit, and the other end being connected with the second adjusting rod; a second rod assembly comprising a second connecting rod unit and a second adjusting unit; the second adjusting unit comprising a third adjusting rod, a fourth adjusting rod and a second threaded portion; one end of the third adjusting rod being connected with the second connecting rod unit, and the other end being connected with the fourth adjusting rod; and a connecting assembly being axially sleeved on the first adjusting unit and the second adjusting unit and being threadedly connected with the outer peripheral walls of the first adjusting rod and the third adjusting rod. The present application solves the problem of how to realize the length adjustment of the connecting rod device while ensuring the efficiency of force transmission and the locking effect of the connecting rod device.

Description

Technical Field

[0001] This invention relates to the field of vehicle engineering technology, and more specifically, to an adjustable linkage device and a vehicle. Background Technology

[0002] A connecting rod is a type of connecting rod in a vehicle assembly that directly or indirectly connects the chassis to the tires. While ensuring precise positioning, it can also transmit torque and axial force, and absorb vibrations during vehicle movement. It is widely used in the connection between the chassis and rear axle of frameless off-road vehicles, pickup trucks, and cargo trucks.

[0003] However, in existing technologies, the length of the connecting rod between the vehicle frame and the tire is fixed and non-adjustable, severely limiting its application scenarios. Current technologies use a simple connection method for the two rods of a split connecting rod, or provide a hollow extension structure to lengthen the rod. However, this method is prone to loosening due to repeated vibrations during vehicle operation, and the hollow extension structure can easily lead to unstable force transmission and low efficiency. Therefore, how to achieve adjustable length of the connecting rod while ensuring efficient force transmission and locking effect has become a pressing technical problem to be solved in this field. Summary of the Invention

[0004] To address the challenge of ensuring efficient force transmission and locking effect while achieving adjustable linkage length, this invention provides an adjustable linkage device and a vehicle.

[0005] In a first aspect, the present invention provides an adjustable linkage device, comprising:

[0006] The first rod assembly includes a first connecting rod unit and a first adjusting unit; the first adjusting unit includes a first adjusting rod, a second adjusting rod, a first threaded portion, and a first locking portion; one end of the first adjusting rod is connected to the first connecting rod unit, and the other end is connected to the second adjusting rod; the first threaded portion is provided on at least a portion of the outer peripheral wall of the first adjusting rod; the first locking portion is sleeved on at least a portion of the first adjusting rod provided with the first threaded portion;

[0007] The second rod assembly includes a second connecting rod unit and a second adjusting unit; the second adjusting unit includes a third adjusting rod, a fourth adjusting rod, and a second threaded portion; one end of the third adjusting rod is connected to the second connecting rod unit, and the other end is connected to the fourth adjusting rod; the second threaded portion is provided on at least a portion of the outer peripheral wall of the third adjusting rod.

[0008] A connecting component is respectively sleeved on the first adjusting unit and the second adjusting unit along the axial direction and threadedly connected to the outer peripheral wall of the first adjusting rod and the third adjusting rod;

[0009] Wherein, the radial projections of the second adjusting rod and the fourth adjusting rod at least partially overlap and abut against each other; the force borne by the first rod assembly is greater than the force borne by the second rod assembly; in the adjusted state of the adjustable linkage device, the connecting assembly is driven to rotate circumferentially and drive the second adjusting rod and the fourth adjusting rod to move relative to each other axially to a preset adjustment position, and the first locking part is driven to move toward the preset adjustment position and abut against and lock with the connecting assembly.

[0010] Optionally, the portions of the second adjusting rod and the fourth adjusting rod whose radial orthographic projections overlap are interference-fitted; in the motion state of the adjustable linkage device, the second adjusting rod and the fourth adjusting rod provide an interaction force.

[0011] Optionally, the connecting assembly includes a first connecting portion, a second connecting portion, a third connecting portion, and a fourth connecting portion integrally formed along the axial direction; the first connecting portion is threadedly connected to the first adjusting rod; the second connecting portion is interference-fitted with the outer peripheral wall of the second adjusting rod; the third connecting portion is transition-fitted or clearance-fitted with the fourth adjusting rod; and the fourth connecting portion is threadedly connected to the third adjusting rod.

[0012] Optionally, the first threaded portion has a first orthographic projection in the first adjusting rod along the radial direction; the second threaded portion has a second orthographic projection in the third adjusting rod along the radial direction; wherein the length of the first orthographic projection along the axial direction is greater than the length of the second orthographic projection along the axial direction.

[0013] Optionally, both the second adjusting rod and the fourth adjusting rod include a main body and a plurality of serrated portions; one side of the main body abuts against the connecting assembly, and the other side is provided with a plurality of serrated portions; the plurality of serrated portions are arranged radially at intervals on the main body; the radial width of the serrated portions gradually decreases in the direction away from the main body; wherein the plurality of serrated portions of the second adjusting rod meshes with the plurality of serrated portions of the fourth adjusting rod.

[0014] Optionally, adjacent serrated portions on the same main body may have the same radial height; or, the radial height of multiple serrated portions on the same main body may gradually decrease from opposite sides of the main body toward the central axis.

[0015] Optionally, the ratio of the axial length of the first adjusting rod to the axial length of the second adjusting rod is 1:1; the ratio of the axial length of the third adjusting rod to the axial length of the fourth adjusting rod is 1:1.

[0016] Optionally, the first linkage unit includes a first rod body and a fork body; one end of the first rod body is connected to the fork body, and the other end is connected to the first adjusting rod.

[0017] The second linkage unit includes a second rod body and a mounting ring. One end of the second rod body is connected to the mounting ring, and the other end is connected to the third adjusting rod.

[0018] Optionally, the second adjustment unit further includes a second locking part; the second locking part is sleeved on at least a portion of the third adjustment rod having the second threaded part; in the adjustment state of the adjustable linkage device, based on the fact that the force borne by the first rod assembly is greater than the force borne by the second rod assembly, the second adjustment rod and the fourth adjustment rod are driven to move axially to a preset adjustment position, and the first locking part and the second locking part are driven to move toward the preset adjustment position and abut against and lock with the connecting assembly.

[0019] In a second aspect, the present invention provides a vehicle including, optionally, an adjustable linkage device according to any of the first aspects.

[0020] To address the challenge of ensuring efficient force transmission and effective locking of the linkage while maintaining adjustable length, this invention offers the following advantages:

[0021] By providing a first threaded portion on the outer peripheral wall of the first adjusting rod, a second threaded portion on the outer peripheral wall of the third adjusting rod, and threading the connecting assembly to the outer peripheral walls of the first and third adjusting rods, the length of the adjustable link can be adjusted. This allows the adjustable link device to be applied between the frame and tire in different installation spaces. Furthermore, while ensuring the adjustable link can be lengthened, the radial projections of the second and fourth adjusting rods at least partially overlap and abut against each other, ensuring both stability and timeliness of force transmission. The force borne by the first rod assembly is greater than that borne by the second rod assembly. When the adjustable link device is in the adjustment state, the first locking part is driven to move towards the preset adjustment position and abut against the connecting assembly to lock, ensuring the locking effect on the side with greater force. With the first adjusting rod threadedly connected to the connecting assembly, a portion of the locking force is ensured, and the first locking part further enhances the locking effect. The adjustable linkage device of the present invention can make adaptive adjustments to meet the needs of installation space or installation length in different usage scenarios, so as to achieve the stability of force transmission after the frame and tire are connected, and ensure the efficiency of force transmission and locking effect of the adjustable linkage. Attached Figure Description

[0022] Figure 1 A perspective view of an adjustable linkage device according to one embodiment is shown;

[0023] Figure 2 A cross-sectional view of an adjustable linkage device according to one embodiment is shown;

[0024] Figure 3 A perspective view of the second link assembly of an adjustable linkage device according to one embodiment is shown;

[0025] Figure 4 A cross-sectional view of a serrated portion of an adjustable linkage device according to one embodiment is shown;

[0026] Figure 5 A cross-sectional view of another serrated portion of an adjustable linkage device according to one embodiment is shown.

[0027] Reference numerals: 10, First rod assembly; 11, First connecting rod unit; 111, First rod body; 112, Fork body; 12, First adjusting unit; 121, First adjusting rod; 122, Second adjusting rod; 123, First locking part; 20, Second rod assembly; 21, Second connecting rod unit; 211, Second rod body; 212, Mounting ring; 22, Second adjusting unit; 221, Third adjusting rod; 222, Fourth adjusting rod; 223, Second locking part; 30, Connecting assembly; 31, First connecting part; 32, Second connecting part; 33, Third connecting part; 34, Fourth connecting part; 40, Main body; 50, Serrated part. Detailed Implementation

[0028] The invention will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are described merely to enable those skilled in the art to better understand and thus implement the invention, and are not intended to imply any limitation on the scope of the invention.

[0029] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances. In addition, the terms "installed", "set", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0030] In existing connecting rod devices, a fixed-length, non-adjustable connecting rod is typically placed between the vehicle frame and tires or in other mechanical structures; however, the application scenarios for this type of device are very limited. Alternatively, to extend the connecting rod length and make it applicable to more scenarios, a split connecting rod is used, but its connection method is too simple and prone to loosening during vehicle operation or mechanical structure movement. Another option is to provide a hollow extension structure to lengthen the connecting rod, but this structure is prone to problems such as low force transmission efficiency and instability during use. Therefore, an adjustable connecting rod device is needed, which allows for adjustable length of the connecting rod in different mechanical structures while ensuring efficient force transmission and locking effect.

[0031] Example 1:

[0032] This embodiment discloses an adjustable linkage device. Please refer to [reference needed]. Figure 1 The adjustable linkage device includes:

[0033] The first rod assembly 10 includes a first connecting rod unit 11 and a first adjusting unit 12. The first adjusting unit 12 includes a first adjusting rod 121, a second adjusting rod 122, a first threaded portion, and a first locking portion 123. One end of the first adjusting rod 121 is connected to the first connecting rod unit 11, and the other end is connected to the second adjusting rod 122. The first threaded portion (not shown) is provided on at least a portion of the outer peripheral wall of the first adjusting rod 121. The first locking portion 123 is sleeved on at least a portion of the first adjusting rod 121 with the first threaded portion, and cooperates with the connecting assembly 30 described below to allow the first adjusting rod 121 to adjust its length relative to the connecting assembly 30. That is, while the connecting assembly 30 rotates circumferentially, the connecting assembly 30 drives the first rod assembly 10 to rotate. The first locking portion 123 and the first threaded portion ensure locking force while adjusting the length of the first rod assembly 10 relative to the connecting assembly 30.

[0034] The second rod assembly 20 includes a second connecting rod unit 21 and a second adjusting unit 22. The second adjusting unit 22 includes a third adjusting rod 221, a fourth adjusting rod 222, and a second threaded portion (not shown in the figure). One end of the third adjusting rod 221 is connected to the second connecting rod unit 21, and the other end is connected to the fourth adjusting rod 222. The second threaded portion is provided on at least a portion of the outer peripheral wall of the third adjusting rod 221 and cooperates with the connecting assembly 30 described below to allow the third adjusting rod 221 to adjust its length relative to the connecting assembly 30. While the connecting assembly 30 rotates circumferentially, it drives the second rod assembly 20 to rotate. The second threaded portion on the third adjusting rod 221 ensures a certain degree of locking force while enabling the second rod assembly 20 to adjust its length relative to the connecting assembly 30.

[0035] The connecting component 30 is respectively sleeved on the first adjusting unit 12 and the second adjusting unit 22 along the axial direction and threadedly connected to the outer peripheral wall of the first adjusting rod 121 and the third adjusting rod 221. The connecting component 30 is provided with threads inside that mate with the first threaded part and the second threaded part.

[0036] Specifically, compared to existing connecting rod devices, which use a fixed-length, non-adjustable connecting rod, or a split connecting rod with a simple connection method, both suffer from limited application scenarios or are prone to loosening. In this invention, the adjustable connecting rod device uses threads on both sides to connect to the connecting assembly 30. When adjusting the length of the adjustable connecting rod device, the connecting assembly 30 is rotated circumferentially. Based on the first and second threaded portions, the rotation of the connecting assembly 30 drives the first adjustment unit 12 and the second adjustment unit 22 to rotate simultaneously, thereby changing the length of the first adjustment unit 12 and the second adjustment unit 22 relative to the connecting assembly 30. At the same time, because the threaded connection has a locking force, the lengths of both the first rod assembly 10 and the second rod assembly 20 can be adjusted, while improving the locking force.

[0037] Wherein, the radial orthogonal projections of the second adjusting rod 122 and the fourth adjusting rod 222 at least partially overlap and abut against each other; the force borne by the first rod assembly 10 is greater than the force borne by the second rod assembly 20; in the adjustment state of the adjustable linkage device, the drive connecting assembly 30 is rotated circumferentially and drives the second adjusting rod 122 and the fourth adjusting rod 222 to move relative to each other axially to the preset adjustment position, and drives the first locking part 123 to move toward the preset adjustment position and abut against and lock with the connecting assembly 30.

[0038] For details, please refer to Figure 2 The contact between the second adjusting rod 122 and the fourth adjusting rod 222 ensures the stability and efficiency of force transmission. Since one side of the first rod assembly 10 is directly or indirectly connected to the wheel, it may be subjected to axial force and torque, both of which are greater than the force borne by the second rod assembly 20. Since the forces on both sides of the adjustable connecting rod are different, it is necessary to ensure the locking effect of the side with greater force during the force transmission process. Otherwise, the adjustable connecting rod will become loose due to the different forces on both sides, resulting in low force transmission efficiency. Based on the present invention, the threaded connection between the first adjusting rod 121 and the connecting assembly 30 ensures a portion of the locking force, while the first locking part 123 further strengthens the locking force.

[0039] Furthermore, the radially overlapping portions of the second adjusting rod 122 and the fourth adjusting rod 222 are interference-fitted; during the motion of the adjustable linkage device, the second adjusting rod 122 and the fourth adjusting rod 222 provide interaction forces. The interference fit eliminates clearance, avoiding impacts and collisions caused by clearance under load, thus improving the vibration resistance and operational stability of the adjustable linkage device during motion. The use of an interference fit in the overlapping portion of the second adjusting rod 122 and the fourth adjusting rod 222 also reduces the possibility of axial slippage between them while achieving force transmission.

[0040] Specifically, in actual assembly, a transition fit can also be used, which is more convenient and easier to disassemble in actual assembly, while still ensuring the efficiency of force transmission of the adjustable linkage device.

[0041] Furthermore, the connecting assembly 30 includes a first connecting portion 31, a second connecting portion 32, a third connecting portion 33, and a fourth connecting portion 34 integrally formed along the axial direction; the first connecting portion 31 is threadedly connected to the first adjusting rod 121; the second connecting portion 32 is interference-fitted with the outer peripheral wall of the second adjusting rod 122; the third connecting portion 33 is transition-fitted or clearance-fitted with the fourth adjusting rod 222; and the fourth connecting portion 34 is threadedly connected to the third adjusting rod 221.

[0042] Specifically, the first connecting part 31, the second connecting part 32, the third connecting part 33, and the fourth connecting part 34, which are integrally formed along the axial direction, ensure the coaxiality and overall rigidity among the four connecting parts, avoiding relative torsion or radial runout when the split sleeve is subjected to eccentric load. Furthermore, the interference fit between the second connecting part 32 and the second adjusting rod 122 provides stable radial support for the second adjusting rod 122 in the adjusted state, effectively suppressing vibration and fretting wear caused by the large force borne by the first rod assembly 10. Simultaneously, the transition fit or clearance fit between the third connecting part 33 and the fourth adjusting rod 222 provides smooth axial sliding space for the fourth adjusting rod 222 during adjustment, avoiding problems such as excessive adjustment resistance, jamming, and high assembly difficulty caused by interference constraints. The first connecting part 31 and the fourth connecting part 34 at both ends are threadedly connected to the first adjusting rod 121 and the fourth adjusting rod 222, respectively. They serve as both the power input end for axial drive and the bearing end that cooperates with the locking part to achieve final locking after adjustment, thereby improving the adjustment accuracy and long-term stability of the adjustable linkage device.

[0043] Furthermore, the first threaded portion has a first orthographic projection on the first adjusting rod 121 along the radial direction; the second threaded portion has a second orthographic projection on the third adjusting rod 221 along the radial direction; wherein, the length of the first orthographic projection along the axial direction is greater than the length of the second orthographic projection along the axial direction.

[0044] Specifically, as mentioned above, during the force transmission process of the adjustable linkage, the force borne by the first linkage assembly 10 is greater than that borne by the second linkage assembly 20. In order to prevent the first linkage assembly 10 from swinging left and right due to the large force it bears, which would cause it to loosen and affect the locking effect, the length of the first threaded part is set to be greater than that of the second threaded part. The longer first threaded part provides more thread bearing turns, so that the threaded pair on the side of the first adjusting rod 121 has higher bearing capacity and anti-slipping ability.

[0045] Specifically, the first threaded portion and the second threaded portion are wound in opposite directions, so that when the drive connection assembly 30 rotates, the adjustment directions of the first rod assembly 10 and the second rod assembly 20 are opposite, and they can move simultaneously away from or towards each other, thereby improving adjustment efficiency.

[0046] Further, please refer to Figure 1 and Figure 3 Both the second adjusting rod 122 and the fourth adjusting rod 222 include a main body 40 and a plurality of serrated portions 50. One side of the main body 40 abuts against the connecting assembly 30, and the other side is provided with a plurality of serrated portions 50. The plurality of serrated portions 50 are arranged radially at intervals on the main body 40. The radial width L of the serrated portions 50 gradually decreases in the direction away from the main body 40. The plurality of serrated portions 50 of the second adjusting rod 122 and the plurality of serrated portions 50 of the fourth adjusting rod 222 mesh with each other.

[0047] Specifically, the serrated portion 50 is designed to increase the contact area between the second adjusting rod 122 and the fourth adjusting rod 222, thus avoiding stress concentration and localized crushing caused by the small contact area when they are in planar contact. The wedge-shaped design of the serrated portion 50, with its width L gradually decreasing towards the central axis, causes the serrations to generate a radial wedging effect when subjected to axial loads. The greater the load, the greater the wedging force, forming a self-locking force-increasing mechanism, effectively preventing engagement loosening and improving the reliability of the adjustable linkage device connection.

[0048] Furthermore, adjacent serrated portions 50 on the same main body 40 have the same radial height; or, the radial height of multiple serrated portions 50 on the same main body 40 gradually decreases from opposite sides of the main body 40 toward the central axis.

[0049] For details, please refer to Figure 4 and Figure 5 In practical applications, the serrated part 50 has two shapes: one is that the serrated part 50 has the same radial height H1 on the main body 40, and the other is that the serrated part 50 gradually decreases in the radial direction H2 on the main body 40 towards the central axis, that is, the height H2 of the serrated part 50 away from the central axis is greater than the height H3 of the serrated part 50 near the central axis.

[0050] Understandably, under axial load, the bending and shear stresses on the outer edge regions of the cross-sections of the second adjusting rod 122 and the fourth adjusting rod 222, which are far from the central axis, are greater than those on the inner regions. Therefore, setting the outer serrated portion 50 to a larger radial height H2 can provide a larger effective load-bearing cross-sectional area and bending section modulus, thereby increasing the meshing contact area and improving the ability to resist shear deformation. At the same time, reducing the height of the inner serrated portion 50 can effectively reduce the stress concentration factor at the tooth root, avoiding fatigue fracture caused by excessive tooth height. On the basis of increasing the meshing contact area, the locking stability, anti-eccentric load capacity, and fatigue life of the adjustable linkage device at the preset adjustment position are further enhanced.

[0051] Furthermore, the ratio of the axial length of the first adjusting rod 121 to the axial length of the second adjusting rod 122 is 1:1; the ratio of the axial length of the third adjusting rod 221 to the axial length of the fourth adjusting rod 222 is 1:1.

[0052] Specifically, the first adjusting rod 121 and the second adjusting rod 122 are of the same length, indicating that the adjustable lengths on both sides of the adjustable link are also the same. Correspondingly, the third adjusting rod 221 and the fourth adjusting rod 222 are of the same length, thereby improving the efficiency of force transmission in the adjustable link and ensuring that the meshing contact section has sufficient axial length to arrange multiple serrated sections 50, thus providing sufficient meshing contact area and shear resistance. This allows the second adjusting rod 122 and the fourth adjusting rod 222 to evenly distribute contact stress and effectively resist eccentric load moments when subjected to the force difference between the first rod assembly 10 and the second rod assembly 20. At the same time, the 1:1 ratio structural design makes the stiffness distribution of the first adjusting rod 121 and the second adjusting rod 122, and the third adjusting rod 221 and the fourth adjusting rod 222 tend to be balanced, avoiding local instability and bending of the rod body under compression or tension due to excessive length differences. This improves the overall structural symmetry, adjustment stability, and load-bearing reliability of the adjustable link device under heavy load conditions.

[0053] Furthermore, the first linkage unit 11 includes a first rod body 111 and a fork body 112; one end of the first rod body 111 is connected to the fork body 112, and the other end is connected to the first adjusting rod 121.

[0054] Specifically, as can be seen from the above, the first linkage unit 11 is indirectly connected to the wheel, so that the fork body 112 can be connected to the drive rod or shock absorber and transmit the axial force or torque provided by the wheel.

[0055] Furthermore, the second linkage unit 21 includes a second rod body 211 and a mounting ring 212. One end of the second rod body 211 is connected to the mounting ring 212, and the other end is connected to the third adjusting rod 221.

[0056] Specifically, in this embodiment, one side of the mounting ring 212 is directly connected to the frame, so that force is directly transmitted to the frame through the mounting ring 212.

[0057] Further, please refer to Figure 2 and Figure 3 The second adjustment unit 22 further includes a second locking part 223; the second locking part 223 is sleeved on at least a portion of the third adjustment rod 221 having a second threaded portion; in the adjustment state of the adjustable linkage device, based on the fact that the force borne by the first rod assembly 10 is greater than the force borne by the second rod assembly 20, the second adjustment rod 122 and the fourth adjustment rod 222 are driven to move axially to a preset adjustment position, and the first locking part 123 and the second locking part 223 are driven to move towards the preset adjustment position and abut against and lock with the connecting assembly 30. The preset adjustment position is when the serrated portion 50 of the second adjustment rod 122 and the serrated portion 50 of the fourth adjustment rod 222 are engaged, and the connecting assembly 30 is in a screw-on abutment position with the first locking part 123 and / or the second locking part 223.

[0058] Specifically, a first locking part 123 and a second locking part 223 are respectively provided on both sides of the adjustable linkage device. The double-sided locking structure improves the anti-vibration and anti-loosening performance in motion. Even under severe vibration and impact load, the two locking parts can work together to maintain the relative position stability between the connecting component 30 and the adjusting rod, ensuring the long-term maintenance of adjustment accuracy.

[0059] Example 2:

[0060] This invention provides a vehicle including any of the adjustable linkage devices described in Embodiment 1. An adjustable linkage device can be applied to robots or vehicles, including but not limited to these. Specifically, an adjustable linkage device can be applied between a vehicle frame and a tire.

[0061] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made in form and detail without departing from the scope of the present invention.

Claims

1. An adjustable linkage device, characterized in that, include: The first rod assembly includes a first connecting rod unit and a first adjusting unit; the first adjusting unit includes a first adjusting rod, a second adjusting rod, a first threaded portion, and a first locking portion; one end of the first adjusting rod is connected to the first connecting rod unit, and the other end is connected to the second adjusting rod; the first threaded portion is provided on at least a portion of the outer peripheral wall of the first adjusting rod; the first locking portion is sleeved on at least a portion of the first adjusting rod provided with the first threaded portion; The second rod assembly includes a second connecting rod unit and a second adjusting unit; the second adjusting unit includes a third adjusting rod, a fourth adjusting rod, and a second threaded portion; one end of the third adjusting rod is connected to the second connecting rod unit, and the other end is connected to the fourth adjusting rod; the second threaded portion is provided on at least a portion of the outer peripheral wall of the third adjusting rod. A connecting component is respectively sleeved on the first adjusting unit and the second adjusting unit along the axial direction and threadedly connected to the outer peripheral wall of the first adjusting rod and the third adjusting rod; Wherein, the radial projections of the second adjusting rod and the fourth adjusting rod at least partially overlap and abut against each other; the force borne by the first rod assembly is greater than the force borne by the second rod assembly; in the adjusted state of the adjustable linkage device, the connecting assembly is driven to rotate circumferentially and drive the second adjusting rod and the fourth adjusting rod to move relative to each other axially to a preset adjustment position, and the first locking part is driven to move toward the preset adjustment position and abut against and lock with the connecting assembly.

2. The adjustable linkage device according to claim 1, characterized in that, The second adjusting rod and the fourth adjusting rod are interference-fitted in the radial directions where their orthogonal projections overlap; in the motion state of the adjustable linkage device, the second adjusting rod and the fourth adjusting rod provide an interaction force.

3. The adjustable linkage device according to claim 1, characterized in that, The connecting assembly includes a first connecting part, a second connecting part, a third connecting part, and a fourth connecting part integrally formed along the axial direction; the first connecting part is threadedly connected to the first adjusting rod; the second connecting part is interference-fitted with the outer peripheral wall of the second adjusting rod; the third connecting part is transition-fitted or clearance-fitted with the fourth adjusting rod; and the fourth connecting part is threadedly connected to the third adjusting rod.

4. The adjustable linkage device according to claim 1, characterized in that, The first threaded portion has a first orthographic projection in the first adjusting rod along the radial direction; the second threaded portion has a second orthographic projection in the third adjusting rod along the radial direction; wherein the length of the first orthographic projection along the axial direction is greater than the length of the second orthographic projection along the axial direction.

5. An adjustable linkage device according to claim 1, characterized in that, Both the second adjusting rod and the fourth adjusting rod include a main body and a plurality of serrated portions; one side of the main body abuts against the connecting assembly, and the other side is provided with a plurality of serrated portions; the plurality of serrated portions are arranged radially at intervals on the main body; the radial width of the serrated portions gradually decreases in the direction away from the main body; wherein, the plurality of serrated portions of the second adjusting rod and the plurality of serrated portions of the fourth adjusting rod mesh with each other.

6. An adjustable linkage device according to claim 5, characterized in that, The adjacent serrated portions on the same main body are provided to have the same radial height; or, the radial height of multiple serrated portions on the same main body gradually decreases from opposite sides of the main body towards the central axis.

7. An adjustable linkage device according to claim 1, characterized in that, The ratio of the axial length of the first adjusting rod to the axial length of the second adjusting rod is 1:1; the ratio of the axial length of the third adjusting rod to the axial length of the fourth adjusting rod is 1:

1.

8. An adjustable linkage device according to claim 1, characterized in that, The first linkage unit includes a first rod body and a fork body; one end of the first rod body is connected to the fork body, and the other end is connected to the first adjusting rod. The second linkage unit includes a second rod body and a mounting ring. One end of the second rod body is connected to the mounting ring, and the other end is connected to the third adjusting rod.

9. An adjustable linkage device according to any one of claims 1-8, characterized in that, The second adjustment unit further includes a second locking part; the second locking part is sleeved on at least a portion of the third adjustment rod having the second threaded part; in the adjustment state of the adjustable linkage device, based on the fact that the force borne by the first rod assembly is greater than the force borne by the second rod assembly, the second adjustment rod and the fourth adjustment rod are driven to move axially to a preset adjustment position, and the first locking part and the second locking part are driven to move toward the preset adjustment position and abut against and lock with the connecting assembly.

10. A vehicle, characterized in that, Includes an adjustable linkage device as described in any one of claims 1-9.

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