Hooke joint connecting structure based on off-axis form

Abstract

The invention relates to a hooke joint connection structure based on an off-axis form, the structure is installed on a hub motor of a wheel, the structure comprises a first lower swing arm, a second lower swing arm and a steering knuckle, the first lower swing arm, the second lower swing arm and the steering knuckle are connected in sequence, the steering knuckle is installed on the hub motor, and the hub motor is connected with the second lower swing arm. The structure further comprises a first threaded shaft, a first bearing, a second threaded shaft and a second bearing, the first lower swing arm and the second lower swing arm are connected through the first threaded shaft and the first bearing, and the second lower swing arm and the steering knuckle are connected through the second threaded shaft and the second bearing. And the joint of the second lower swing arm and the steering knuckle is arranged in the wheel space. The positions of the first lower swing arm, the second lower swing arm and the steering knuckle are redesigned, the scheme of an off-axis hooke joint form is adopted, wheel steering motion and up-down jumping motion decoupling are achieved through the double swing arms, the occupied size is smaller, the double swing arms are more easily arranged in the wheel space, and the purpose of reducing the offset distance of a master pin is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of Hooke's hinge connection structures, and in particular to a Hooke's hinge connection structure based on an eccentric form. Background Art

[0002] The hub motor in the hub motor driving unit will take up a lot of space inside the wheel, resulting in the lower ball joint under the traditional technical solution being unable to be arranged inside the wheel.

[0003] The invention patent with publication number CN114715274A discloses an all-terrain vehicle front suspension with adjustable wheel camber angle. The front suspension structure includes an upper swing arm, a column, an angular contact ball bearing, a wheel hub, a lower swing arm and a shock absorber; the upper swing arm can adjust its length through the threaded connection between the first rod end joint bearing and the first welding sleeve, and the lower swing arm can adjust its length through the threaded connection between the second rod end joint bearing and the second welding sleeve, so as to adjust the camber angle of the wheel, prevent the camber angle deviation caused by the manufacturing error of the vehicle body and the suspension and the plastic deformation of the mounting point, and reduce the abnormal wear of the wheel; however, the patent does not realize the arrangement of the lower ball joint inside the wheel.

[0004] Therefore, providing a connection structure capable of arranging the lower ball joint in the wheel hub motor is an issue that urgently needs to be solved. Summary of the invention

[0005] The purpose of the present invention is to provide a Hooke's hinge connection structure based on an eccentric form in order to overcome the defects of the above-mentioned prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] According to one aspect of the present invention, a Hooke's hinge connection structure based on an eccentric shaft form is provided, and the structure is installed on a wheel hub motor. The structure includes a first lower swing arm, a second lower swing arm and a steering knuckle, and the first lower swing arm, the second lower swing arm and the steering knuckle are connected in sequence, and the steering knuckle is installed on the wheel hub motor. The structure also includes a first threaded shaft, a first bearing, a second threaded shaft and a second bearing, the first lower swing arm and the second lower swing arm are connected through the first threaded shaft and the first bearing, the second lower swing arm and the steering knuckle are connected through the second threaded shaft and the second bearing, and the connection between the second lower swing arm and the steering knuckle is located inside the wheel space.

[0008] As a preferred technical solution, a through hole is provided at the connection of the first lower swing arm, a threaded hole is provided at the connection of the second lower swing arm, a through hole is provided at the connection of the steering knuckle, the through hole of the first lower swing arm matches with the threaded hole of the second lower swing arm, and the threaded hole of the second lower swing arm matches with the through hole of the steering knuckle.

[0009] As a preferred technical solution, the first bearing is installed in the through hole of the first lower swing arm, and the first threaded shaft passes through the first bearing and is connected to the threaded hole of the second lower swing arm.

[0010] As a preferred technical solution, the first threaded shaft and the first bearing are interference fit, and the second threaded shaft and the second bearing are interference fit.

[0011] As a preferred technical solution, the second bearing is installed in the through hole of the steering knuckle, and the second threaded shaft passes through the second bearing and is connected to the threaded hole of the second lower swing arm.

[0012] As a preferred technical solution, the structure further includes end covers, which are respectively mounted at the through holes of the first lower swing arm and the steering knuckle.

[0013] As a preferred technical solution, the first bearing is a radial bearing, and the second bearing is a thrust roller bearing.

[0014] As a preferred technical solution, the structure also includes a wear-resistant gasket, which is installed on the rotating contact end surfaces of the first lower swing arm and the second lower swing arm, and the wear-resistant gasket is installed on the rotating contact end surfaces of the second lower swing arm and the steering knuckle.

[0015] As a preferred technical solution, the structure further includes a lateral stabilizer bar, which is mounted on the second lower swing arm. The steering knuckle is provided with a bending structure, which is connected to the second lower swing arm.

[0016] As a preferred technical solution, the structure also includes a brake disc, which is installed on the hub motor, the outer shell of the hub motor is fastened to the wheel by bolts, and the outer shell of the hub motor is fastened to the brake disc by bolts.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention redesigns the positions of the first lower swing arm, the second lower swing arm and the steering knuckle, adopts an eccentric Hooker joint solution, and realizes the decoupling of the wheel steering movement and the up and down bouncing movement through the double swing arm. Compared with the traditional lower ball joint, it occupies a smaller volume and is easier to arrange in the wheel space, thereby achieving the purpose of reducing the kingpin offset.

[0019] 2. The connection point between the second lower swing arm and the steering knuckle of the present invention is placed inside the wheel space, which is beneficial to reducing the kingpin offset and improving the high-speed driving stability of the vehicle.

[0020] 3. The present invention adopts radial bearings and thrust roller bearings. The radial bearings bear radial forces, and the thrust roller bearings can bear certain axial loads while bearing radial loads to ensure that the structure here will not be damaged due to longitudinal bumps.

[0021] 4. In the present invention, wear-resistant gaskets are arranged on the rotational contact end surfaces of the first lower swing arm, the second lower swing arm and the steering knuckle to protect the contact points from excessive wear.

[0022] 5. The present invention also provides a lateral stabilizer bar as an auxiliary elastic element to enhance the strength of the second lower swing arm, maintain the structural stability of the connection with the steering knuckle, and keep the body balanced when the body rolls significantly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a partial schematic diagram of the eccentric Hooke's hinge of the present invention;

[0025] Figure 3 It is a schematic diagram of the connection between the lower swing arms of the present invention;

[0026] Figure 4 It is a schematic diagram of the connection between the second lower swing arm and the steering knuckle of the present invention;

[0027] Figure 5 A schematic diagram of the rotation angle of a wheel on one side of the present invention;

[0028] Figure 6 It is a schematic diagram of the rotation angle of the wheel on the other side of the present invention.

[0029] 101. Spring; 102. Shock absorber; 201. Wheel; 202. Steering knuckle; 301. First lower arm; 302. Second lower arm; 3031. First threaded shaft; 3032. Second threaded shaft; 3041. First bearing; 3042. Second bearing; 305. End cover; 306. Wear-resistant gasket; 307. Lateral stabilizer bar; 401. Brake disc; 501. Hub motor; A. Wheel direction; B. Vehicle body direction. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] In view of the problem that the lower ball joint cannot be arranged in the wheel hub motor, the present invention provides a Hooke's joint connection structure based on the eccentric form; the present invention redesigns the positions of the first lower swing arm, the second lower swing arm and the steering knuckle, adopts the eccentric Hooke's joint form, and realizes the decoupling of the wheel steering movement and the up and down jumping movement through the double swing arm. Compared with the traditional lower ball joint, it occupies a smaller volume and is easier to be arranged in the wheel space, so as to achieve the purpose of reducing the kingpin offset. The connection point between the second lower swing arm and the steering knuckle of the present invention is placed inside the wheel space, which is conducive to reducing the kingpin offset and improving the high-speed driving stability of the vehicle. The present invention adopts radial bearings and thrust roller bearings. The radial bearing bears radial force. The thrust roller bearing can bear a certain axial load while bearing radial load to ensure that the structure here will not be damaged by longitudinal bumps. The present invention sets wear-resistant gaskets on the rotating contact end faces of the first lower swing arm, the second lower swing arm and the steering knuckle to protect the contact from excessive wear. The present invention also provides a lateral stabilizer bar as an auxiliary elastic element to enhance the strength of the second lower swing arm, maintain the structural stability of the connection with the steering knuckle, and keep the body balanced when the body rolls significantly.

[0032] Example 1

[0033] like Figure 1-Figure 4 As shown, a Hooke's hinge connection structure based on an eccentric form is installed on the hub motor 501 of the wheel 201, the structure includes a first lower swing arm 301, a second lower swing arm 302 and a steering knuckle 202, the first lower swing arm 301, the second lower swing arm 302 and the steering knuckle 202 are connected in sequence, the steering knuckle 202 is installed on the hub motor 501, the structure also includes a first threaded shaft 3031, a first bearing 3041, a second threaded shaft 3032 and a second bearing 3042, the first lower swing arm 301 and the second lower swing arm 302 are connected by the first threaded shaft 3031 and the first bearing 3041, the second lower swing arm 302 and the steering knuckle 202 are connected by the second threaded shaft 3032 and the second bearing 3042, and the connection between the second lower swing arm 302 and the steering knuckle 202 is located inside the space of the wheel 201.

[0034] A through hole is provided at the connection of the first lower swing arm 301, a threaded hole is provided at the connection of the second lower swing arm 302, a through hole is provided at the connection of the steering knuckle 202, the through hole of the first lower swing arm 301 matches with the threaded hole of the second lower swing arm 302, and the threaded hole of the second lower swing arm 302 matches with the through hole of the steering knuckle 202.

[0035] The first bearing 3041 is installed in the through hole of the first lower swing arm 301 , and the first threaded shaft 3031 passes through the first bearing 3041 and is connected to the threaded hole of the second lower swing arm 302 .

[0036] The first threaded shaft 3031 and the first bearing 3041 are in interference fit, and the second threaded shaft 3032 and the second bearing 3042 are in interference fit.

[0037] The second bearing 3042 is installed in the through hole of the steering knuckle 202 , and the second threaded shaft 3032 passes through the second bearing 3042 and is connected to the threaded hole of the second lower swing arm 302 .

[0038] The structure further includes an end cover 305 , which is mounted at the through holes of the first lower swing arm 301 and the steering knuckle 202 , respectively.

[0039] The first bearing 3041 is a radial bearing, and the second bearing 3042 is a thrust roller bearing.

[0040] The structure further includes a wear-resistant gasket 306 , which is mounted on the rotational contact end surfaces of the first lower swing arm 301 and the second lower swing arm 302 , and the wear-resistant gasket 306 is mounted on the rotational contact end surfaces of the second lower swing arm 302 and the steering knuckle 202 .

[0041] The structure further includes a lateral stabilizer bar 307 , which is mounted on the second lower swing arm 302 . The steering knuckle 202 is provided with a bending structure, which is connected to the second lower swing arm 302 .

[0042] The structure further includes a brake disc 401 , which is mounted on the wheel hub motor 501 , the outer shell of the wheel hub motor 501 is fastened to the wheel 201 by bolts, and the outer shell of the wheel hub motor 501 is fastened to the brake disc 401 by bolts.

[0043] In this embodiment, the spring 101 and the shock absorber 102 constitute a spring shock absorber assembly as a whole. The upper end of the spring shock absorber assembly is connected to the vehicle body through bolts and shock absorbing gaskets, and the lower end of the spring shock absorber assembly is rigidly connected to the steering knuckle through bolts. The second lower swing arm 302 serves as the center piece of the eccentric Hooke's hinge and is hinged to the steering knuckle 202 on the kingpin axis through a radial bearing. The eccentric Hooke's hinge refers to: the traditional Hooke's hinge is a structure in which two orthogonal rotation axes intersect, and the lower swing arm in the present invention is a Hooke's hinge-like structure, which also has two orthogonal rotation axes, but they do not intersect in space, so the eccentric axis is used to describe its structure. The kingpin axis is the central axis of the wheel for steering movement, and in this invention it is the central axis of the entire driving unit for steering movement, which is a straight line formed by the center of the upper end of the spring shock absorber and the connection point between the steering knuckle and the lower swing arm.

[0044] Threaded holes are provided on both sides of the axis of one end of the second lower swing arm 302 connected to the first lower swing arm 301, and threaded shafts 3031 on both sides are threadedly connected to the second lower swing arm 302; a through hole is provided on one end of the first lower swing arm 301 connected to the second lower swing arm 302, which can be used for interference fit to place a radial bearing 3041, and an end cover 305 is provided at the opening, and the threaded shaft 3031 and the first lower swing arm 301 are hinged through the radial bearing 3041; a threaded hole is provided on the axis of one end of the second lower swing arm 302 connected to the steering knuckle 202, and the threaded shaft 3032 is threadedly connected to the second lower swing arm 302; the end of the connection between the steering knuckle 202 and the second lower swing arm 302 A stepped through hole is provided for the interference fit of the thrust roller bearing 3042, an end cover 305 is provided at the opening, and the threaded shaft 3032 is hinged to the steering knuckle 202 through the thrust roller bearing 3042; the second lower swing arm 302 is provided with a wear-resistant gasket 306 on the rotating contact end surface with the first lower swing arm 301 and the steering knuckle 202 to fill the space, protect the bearing and the end surface; the steering knuckle 202 is provided with a lower side bending structure to achieve connection with the second lower swing arm 302 in the wheel space; the outer shell of the hub motor 501 is connected to the wheel 201 by bolts to achieve driving, and the outer shell is connected to the brake disc 401 by bolts to achieve braking.

[0045] The installation position of the lateral stabilizer bar 307 is: hinged on one side of the second lower control arm 302; the bar is shared by the two traveling units in a symmetrical position, with the same hinge position, and the middle part is fixed to the frame through a rubber bushing, which serves as an auxiliary elastic element to enhance the strength of the second lower control arm 302, maintain the structural stability of the connection with the steering knuckle 202, and keep the body balanced when the body rolls significantly.

[0046] Figure 5 and Figure 6 It is the extreme angle position of the wheel 201 on both sides during driving. A represents the direction of the wheel 201 and B represents the direction of the vehicle body under a specific arrangement. Under the structure of the present invention, a large angle of left and right direction can be achieved, which is larger than the range of traditional vehicles. Due to the large angle range, under a specific arrangement, one side can be guaranteed to have a sufficient steering angle range while ( Figure 5 ), can achieve the other side to turn to 90° ( Figure 6 ) so that the vehicle can achieve some special movements.

[0047] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A Hooke's hinge connection structure based on an eccentric form, the structure being mounted on a wheel hub motor (501) of a wheel (201), the structure comprising a first lower swing arm (301), a second lower swing arm (302) and a steering knuckle (202), the first lower swing arm (301), the second lower swing arm (302) and the steering knuckle (202) being connected in sequence, the steering knuckle (202) being mounted on the wheel hub motor (501), characterized in that: The structure further comprises a first threaded shaft (3031), a first bearing (3041), a second threaded shaft (3032) and a second bearing (3042); the first lower swing arm (301) and the second lower swing arm (302) are connected via the first threaded shaft (3031) and the first bearing (3041); the second lower swing arm (302) and the steering knuckle (202) are connected via the second threaded shaft (3032) and the second bearing (3042); and the connection between the second lower swing arm (302) and the steering knuckle (202) is located inside the wheel (201) space.

2. The Hooke's hinge connection structure based on the eccentric form according to claim 1 is characterized in that: A through hole is provided at the connection of the first lower swing arm (301), a threaded hole is provided at the connection of the second lower swing arm (302), a through hole is provided at the connection of the steering knuckle (202), the through hole of the first lower swing arm (301) matches with the threaded hole of the second lower swing arm (302), and the threaded hole of the second lower swing arm (302) matches with the through hole of the steering knuckle (202).

3. The Hooke's hinge connection structure based on the eccentric form according to claim 2 is characterized in that: The first bearing (3041) is installed in the through hole of the first lower swing arm (301), and the first threaded shaft (3031) passes through the first bearing (3041) and is connected to the threaded hole of the second lower swing arm (302).

4. The Hooke's hinge connection structure based on the eccentric form according to claim 3 is characterized in that: The first threaded shaft (3031) and the first bearing (3041) are in an interference fit, and the second threaded shaft (3032) and the second bearing (3042) are in an interference fit.

5. The Hooke's hinge connection structure based on the eccentric form according to claim 2 is characterized in that: The second bearing (3042) is installed in the through hole of the steering knuckle (202), and the second threaded shaft (3032) passes through the second bearing (3042) and is connected to the threaded hole of the second lower swing arm (302).

6. The Hooke's hinge connection structure based on the eccentric form according to claim 2 is characterized in that: The structure further comprises an end cover (305), and the end cover (305) is respectively mounted at the through holes of the first lower swing arm (301) and the steering knuckle (202).

7. The Hooke's hinge connection structure based on an eccentric form according to claim 1 is characterized in that: The first bearing (3041) is a radial bearing, and the second bearing (3042) is a thrust roller bearing.

8. The Hooke's hinge connection structure based on an eccentric form according to claim 1 is characterized in that: The structure further comprises a wear-resistant gasket (306), wherein the wear-resistant gasket (306) is mounted on the rotational contact end surfaces of the first lower swing arm (301) and the second lower swing arm (302), and the wear-resistant gasket (306) is mounted on the rotational contact end surfaces of the second lower swing arm (302) and the steering knuckle (202).

9. The Hooke's hinge connection structure based on an eccentric form according to claim 1, characterized in that: The structure further comprises a lateral stabilizer bar (307), wherein the lateral stabilizer bar (307) is mounted on the second lower swing arm (302), and the steering knuckle (202) is provided with a bending structure, wherein the bending structure is connected to the second lower swing arm (302).

10. The Hooke's hinge connection structure based on the eccentric form according to claim 1, characterized in that: The structure further comprises a brake disc (401), wherein the brake disc (401) is mounted on the wheel hub motor (501), the outer shell of the wheel hub motor (501) is fastened to the wheel (201) via bolts, and the outer shell of the wheel hub motor (501) is fastened to the brake disc (401) via bolts.

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