CN218882832U

CN218882832U - Duplex constant velocity universal joint for steering drive axle

Info

Publication number: CN218882832U
Application number: CN202320015309.2U
Authority: CN
Inventors: 张立新; 李娜; 孟浩; 刘洪飞; 倪占强
Original assignee: Yituo Luoyang Hydraulic Transmission Co ltd
Current assignee: Yituo Luoyang Hydraulic Transmission Co ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-04-18
Anticipated expiration: 2033-01-05

Abstract

The utility model relates to a pair constant velocity cardan joint for steering drive axle technical field, including pair universal joint, the equal movable sleeve of pair universal joint two fork axle shaft bodies is equipped with the resilient means rather than matching, and resilient means has elasticity along the pair universal joint fork axle axial that corresponds. The utility model discloses because two fork axle shaft bodies of dual universal joint all are equipped with the setting rather than the resilient means who matches, when using, the knuckle on the axle turns to the in-process, and the elastic force effect that two fork axle shoulders of dual universal joint received is the same, has guaranteed that two fork axle angular velocity of dual universal joint is the same for the dual universal joint remains the constant speed state throughout at the whole steering process of axle.

Description

Duplex constant velocity universal joint for steering drive axle

Technical Field

The utility model relates to a pair constant velocity universal joint technical field especially relates to a pair constant velocity universal joint for steering drive axle.

Background

A duplex universal transmission shaft with strong bearing capacity and large rotation angle is generally applied to a steering drive axle of a current non-road vehicle and a steering drive axle of a four-wheel-drive heavy truck. The universal drive shaft has the following functions in the bridge assembly: kinetic energy transmitted from a vehicle gearbox to a main speed reducer of the axle assembly is transmitted to a hub speed reducer or a hub on the axle assembly so as to drive wheels to rotate. The mounting mode of the steering drive axle assembly on the vehicle chassis is as follows: the axle housing is fixed on the chassis, and a steering knuckle of the axle assembly is connected with the axle housing through upper and lower coaxial bearings. One fork shaft of the universal transmission shaft is connected with the steering knuckle, the other fork shaft of the universal transmission shaft is connected with the axle housing, and the fork shafts are connected with the duplex fork through the cross shaft assembly to form the universal joint for transmitting power.

Because the steering knuckle on the axle assembly is fixed on the axle housing relative to the steering pivot rotating with the axle housing, the fork shaft can axially move in the steering process of the steering knuckle, if the axial directions of the two ends of the fork shaft are not limited, the axial movement of the two fork shafts can randomly change in the steering process of the steering knuckle, and the rotating speed of the two fork shafts is difficult to ensure to be equal.

In the current mainstream design theory, in order to reduce the minimum fluctuation of the rotating speed of a transmission shaft in the process of axle steering as much as possible, one fork shaft is usually axially fixed, the other fork shaft is axially free, a steering pivot and the center of a duplex fork are offset by a distance in advance at a rotating angle of 0 DEG, and the rotating speed is at the maximum rotating angle alpha _max The rotation of the shafts is constant, so that the rotation of the shafts is constant at a rotation angle of 0 DEG and a maximum rotation angle of 0 DEG-alpha _max The left fork shaft and the right fork shaft are not at equal speed.

Both types of joints are commonly referred to as quasi-constant velocity joints.

To this end, we provide a twin constant velocity joint for a steer-drive axle.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a duplex constant velocity joint for a steer-drive axle, which solves the above problems.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

a twin constant velocity joint for a steer-drive axle comprising a twin joint characterized by: the elastic devices are matched with the shaft bodies of the two fork shafts of the duplex universal joint in a movable sleeved mode, and the elastic devices are elastic along the axial direction of the corresponding fork shafts of the duplex universal joint.

Preferably, the elastic device comprises a first ring and a second ring, the first ring and the second ring are matched and sleeved on the corresponding shaft body of the dual universal joint fork shaft, and an elastic body which is elastic along the axial direction of the fork shaft is arranged between the first ring and the second ring.

Preferably, the elastic body is a spring parallel to the fork shaft of the duplex universal joint.

Preferably, a plurality of elastic bodies are arranged between the first ring and the second ring along the circumferential direction of the first ring and the second ring at intervals.

Preferably, one end of each elastic body corresponding to the second ring is provided with a mounting seat matched with and coaxial with the elastic body.

Preferably, a spherical rolling body is arranged in the middle of one end face of the mounting seat corresponding to the second ring.

Preferably, the end face of the first ring close to the second ring is provided with spring seats matched with the elastic bodies in a one-to-one correspondence mode.

Preferably, the duplex universal joint comprises a first fork shaft, a second fork shaft and a duplex fork, and two ends of the duplex fork are respectively and correspondingly connected with the first fork shaft and the second fork shaft through a cross shaft.

Has the advantages that:

1. because the two-fork shaft bodies of the duplex universal joint are provided with the elastic devices matched with the two-fork shaft bodies, when the duplex universal joint is used, the elastic force acting on the two-fork shaft shoulders of the duplex universal joint is the same in the steering process of the steering joint on the bridge, the angular velocities of the two-fork shaft of the duplex universal joint are ensured to be the same, and the duplex universal joint is enabled to be always in a constant velocity state in the whole steering process of the bridge.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view in another state of the present invention;

FIG. 3 is an enlarged view of portion I of FIG. 1;

FIG. 4 is a schematic view of the assembly structure of the present invention in the use state;

fig. 5 is a schematic view of an assembly structure in another use state of the present invention;

fig. 6 is a partial enlarged view of II in fig. 5.

The reference numerals are explained below:

1. a duplex universal joint; 11. a first fork shaft; 12. a second fork shaft; 13. a duplex fork; 2. an elastic device; 21. a first ring; 22. a second loop; 23. an elastomer; 24. a mounting base; 25. a spherical rolling body; 26. a spring seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Embodiment one, as shown in fig. 1-6, a duplex constant velocity universal joint for a steering drive axle, which is added with an automatic centering elastic device 2, so that the currently general duplex universal joint 1 changes the unequal-velocity rotation of two fork shafts into the equal-velocity rotation during the steering process; specifically, the universal joint comprises a duplex universal joint 1, wherein two fork shaft bodies of the duplex universal joint 1 are movably sleeved with elastic devices 2 matched with the duplex universal joint 1, and the elastic devices 2 have elasticity along the corresponding fork shaft axial direction of the duplex universal joint 1;

according to the requirement, the duplex universal joint 1 comprises a first fork shaft 11, a second fork shaft 12 and a duplex fork 13, wherein two ends of the duplex fork 13 are respectively and correspondingly connected with the first fork shaft 11 and the second fork shaft 12 through cross shafts.

In the structure, when the universal joint is used, the universal joint is installed on a steering drive axle, the elastic device 2 and the duplex universal joint 1 are matched and assembled with a shift opening size L on the steering drive axle, the elastic device 2 is provided with a certain pre-compression amount and has a certain elastic force, at the moment, in the steering process of the steering joint on the axle, the two shaft shoulders of the duplex universal joint 1 are both acted by the corresponding elastic device 2, the elastic force acted on the two shaft shoulders of the duplex universal joint 1 is the same, and further the two shaft shifting amount X = Y is enabled, so that the isosceles triangle shape of the steering triangle ABCdelta of the universal joint shown in the figures 5-6, namely the isosceles triangle A = C, is ensured, and according to the characteristics of the duplex universal joint 1, the angular speeds of the two shafts of the duplex universal joint 1 are the same at the moment, and the duplex universal joint 1 is enabled to be kept in a constant-speed steering process of the axle all the steering process;

in the scheme, because the two-fork shaft body of the duplex universal joint 1 is provided with the elastic device 2 matched with the two-fork shaft body, when the dual-fork universal joint is used, the elastic force acting on the two-fork shaft shoulder of the duplex universal joint 1 is the same in the steering process of the steering knuckle on the axle, the angular speed of the two-fork shaft of the duplex universal joint 1 is ensured to be the same, and the duplex universal joint 1 is always kept in a constant speed state in the whole steering process of the axle.

In a specific example, the elastic device 2 includes a first ring 21 and a second ring 22, the first ring 21 and the second ring 22 are respectively sleeved on the fork shaft body of the dual universal joint 1, and an elastic body 23 having elasticity along the axial direction of the fork shaft is arranged between the first ring 21 and the second ring 22.

In the second embodiment, on the basis of the first embodiment, as shown in fig. 3, a plurality of elastic bodies 23 are annularly arranged between the first ring 21 and the second ring 22 at equal intervals along the circumferential direction thereof, and the elastic bodies 23 are parallel to the fork shafts of the corresponding duplex universal joint 1;

the elastic body 23 is a spring as required;

the elastic body 23 may also be a spring or an elastic sleeve that is fittingly sleeved on the shaft body of the corresponding duplex universal joint 1.

In the third embodiment, on the basis of the second embodiment, as shown in fig. 3, one end of each elastic body 23 corresponding to the second ring 22 is provided with a mounting seat 24 which is matched with and coaxial with the end of each elastic body 23, specifically, one end of each mounting seat 24 corresponding to the elastic body 23 is of a cylindrical structure inserted into an inner cavity of the elastic body 23, the other end of each mounting seat 24 is of a plate-shaped structure, and specifically, the section of each mounting seat 24 is of a T-shaped structure;

a spherical rolling body 25 is arranged in the middle of one end face of the mounting seat 24 corresponding to the second ring 22;

the spherical rolling element 25 can be a steel ball as required, and the spherical rolling element 25 is partially embedded in the mounting seat 24 and is in rolling fit with the mounting seat 24 as required.

According to the requirement, the end surface of the first ring 21 close to the second ring 22 is provided with a spring seat 26 which is matched with the elastic body 23 in a one-to-one correspondence mode.

In the above scheme, due to the arrangement of the spherical rolling elements 25 in the elastic device 2, the second ring 22 can be ensured to rotate along with the corresponding drive axle or axle housing, so that the elastic body 23 is not twisted, and the normal operation of the elastic body 23 is ensured.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A twin constant velocity joint for a steer-drive axle, comprising a twin joint (1), characterized in that: the elastic device (2) matched with the duplex universal joint (1) is movably sleeved on the two fork shaft bodies of the duplex universal joint (1), and the elastic device (2) has elasticity along the corresponding fork shaft axial direction of the duplex universal joint (1).

2. A twin constant velocity joint for a steer-drive axle according to claim 1, wherein: the elastic device (2) comprises a first ring (21) and a second ring (22), the first ring (21) and the second ring (22) are matched and sleeved on a fork shaft body of the corresponding duplex universal joint (1), and an elastic body (23) which is elastic along the axial direction of the fork shaft is arranged between the first ring (21) and the second ring (22).

3. A twin constant velocity joint for a steer-drive axle according to claim 2, wherein: the elastic body (23) is a spring parallel to the fork shaft of the corresponding duplex universal joint (1).

4. A twin constant velocity joint for a steer-drive axle according to claim 3, wherein: a plurality of elastic bodies (23) are arranged between the first ring (21) and the second ring (22) at intervals along the circumferential direction of the first ring.

5. A twin constant velocity joint for a steer-drive axle according to claim 4, wherein: and one end of each elastic body (23) corresponding to the second ring (22) is provided with a mounting seat (24) which is matched with the elastic body and is coaxial with the elastic body.

6. A twin constant velocity joint for a steer-drive axle according to claim 5, wherein: and a spherical rolling body (25) is arranged in the middle of one end face of the mounting seat (24) corresponding to the second ring (22).

7. A twin constant velocity joint for a steer-drive axle according to claim 4, wherein: the end face of the first ring (21) close to the second ring (22) is provided with spring seats (26) which are matched with the elastic bodies (23) in a one-to-one correspondence mode.

8. A twin constant velocity joint for a steer-drive axle according to claim 1, wherein: the duplex universal joint (1) comprises a first fork shaft (11), a second fork shaft (12) and a duplex fork (13), wherein two ends of the duplex fork (13) are correspondingly connected with the first fork shaft (11) and the second fork shaft (12) through cross shafts respectively.