Steering mechanism suitable for steering drive axle

Abstract

The utility model belongs to the technical field of vehicle steering, and particularly relates to a steering mechanism suitable for a steering drive axle. The longitudinal driving rod is arranged on a left wheel or a right wheel of the vehicle through a first main pin; one end of the steering oil cylinder is mounted on the axle shell through a hinging mechanism, and the other end of the steering oil cylinder is rotationally mounted with the longitudinal driving rod; the transmission connecting rod assembly is installed between a left wheel and a right wheel of the vehicle and used for driving the two wheels to steer synchronously. According to the steering mechanism, the steering oil cylinder is transversely arranged, the connecting point of the steering oil cylinder and the frame in the prior art is changed into the connecting point on the axle shell, and the problems that in the prior art, due to the fact that the steering oil cylinder is longitudinally arranged, the occupied space is large, and assembling and adjusting are inconvenient are solved. By ingeniously changing the movement direction of the steering oil cylinder, the longitudinal rod system movement space is reduced, the integration degree is high, transmission points are reduced, and arrangement, installation and maintenance of the whole vehicle are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle steering, and in particular relates to a steering mechanism suitable for a steering drive axle. Background Art

[0002] The drive axle is a mechanism at the end of the transmission system that can change the speed and torque from the transmission and transmit them to the drive wheels. Existing four-wheel drive vehicles usually have two drive axles, each of which is used to drive a pair of wheels on both sides of the vehicle. Depending on the number and position of the drive axles driven by the engine, front-wheel drive, rear-wheel drive or four-wheel drive can be achieved.

[0003] The steering mechanism adopted by the existing steering drive axle is as follows Figure 1 As shown, the steering cylinder (4') is longitudinally arranged on one side of the wheel, one end of which is mounted on the frame (10') and the other end of which is rotatably mounted on the steering arm (11'). It occupies a large space for vehicle layout, has many connection points in the entire structure, has complex motion relationships, is difficult to install and debug, and is also relatively cumbersome to check. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art that the steering cylinder is arranged longitudinally, which occupies a large space and has many connection points, and to provide a steering mechanism suitable for a steering drive axle, which is installed on the vehicle axle, arranged transversely, occupies a small space, has a simple movement relationship, and is suitable for a steering drive axle.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A steering mechanism suitable for a steering drive axle, comprising:

[0007] a longitudinal drive rod, mounted on the left or right wheel of the vehicle via a first king pin;

[0008] A steering cylinder, one end of which is mounted on the axle housing through an articulated mechanism, and the other end of which is rotatably mounted on the longitudinal drive rod;

[0009] The transmission connecting rod assembly is installed between the left wheel and the right wheel of the vehicle to drive the two wheels to turn synchronously;

[0010] When the vehicle is in an adjustment state, the distance from the mounting point of the steering cylinder on the articulated mechanism to the first kingpin in the X-axis direction is L; the distance from the center point of the axle housing to the first kingpin in the X-axis direction is D; wherein L>D.

[0011] Furthermore, the articulated mechanism includes a support frame fixedly arranged on the axle housing, a ball bowl seat installed on the support frame, and a ball head installed at one end of the steering cylinder and rotatably matched with the ball bowl seat.

[0012] Furthermore, the steering cylinder drives the longitudinal drive rod to rotate along the first kingpin at an angle of -33.7°≤a≤+43°.

[0013] Furthermore, when turning left, the rotation angle of the left wheel is -43°≤a 左 ≤0°, the rotation angle of the right wheel is -33.7°≤a 右 ≤0°;

[0014] When turning right, the rotation angle of the right wheel is 0°≤a 右 ≤43°, the rotation angle of the left wheel is 0°≤a 左 ≤33.7°

[0015] Furthermore, one end of the longitudinal drive rod is connected to the right wheel of the vehicle through a first kingpin, and the right wheel rotates following the longitudinal drive rod; the corresponding left wheel of the vehicle is rotatably mounted with the axle through a second kingpin.

[0016] Furthermore, the transmission connecting rod assembly includes a right connecting rod, a lateral tie rod and a left connecting rod which are rotatably connected in sequence; one end of the right connecting rod away from the lateral tie rod is fixedly connected to the corresponding left wheel of the vehicle, and one end of the left connecting rod away from the lateral tie rod is fixedly connected to the corresponding right wheel of the vehicle.

[0017] Furthermore, the right wheel of the vehicle is rotatably mounted to one end of the axle via a first kingpin, and the left wheel of the vehicle is rotatably mounted to the other end of the axle via a second kingpin.

[0018] Furthermore, when the steering cylinder extends, it drives the longitudinal drive rod to rotate clockwise along the first kingpin, and the vehicle turns right;

[0019] When the steering cylinder contracts, it drives the longitudinal drive rod to rotate counterclockwise along the first kingpin, and the vehicle turns left.

[0020] The beneficial effects of a steering mechanism suitable for a steering drive axle of the utility model are:

[0021] The steering mechanism of the utility model sets the steering cylinder horizontally, and sets an articulated mechanism for installing the steering cylinder on the axle housing, so that one end of the steering cylinder is installed on the articulated mechanism, and the other end is connected to the longitudinal drive rod, and the connection point between the steering cylinder and the frame in the prior art is transformed into a connection point on the axle housing, solving the problem of large space occupation and inconvenient assembly and adjustment caused by the longitudinal setting of the steering cylinder in the prior art. The utility model cleverly changes the movement direction of the steering cylinder, reduces the longitudinal rod system movement space, has high integration, and reduces the transmission points, which is convenient for the layout, installation and maintenance of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Figure 1 It is a simplified structural diagram of a steering mechanism in the prior art.

[0024] Figure 2 It is a structural schematic diagram of the steering mechanism of the embodiment of the utility model in the correcting state.

[0025] Figure 3 It is an installation diagram of a longitudinal drive rod and a steering cylinder when the steering mechanism of an embodiment of the utility model is in an adjusted state.

[0026] Figure 4 It is a detailed installation diagram of the articulated mechanism and the steering cylinder of the embodiment of the utility model.

[0027] Figure 5 It is a structural schematic diagram of the steering mechanism of the embodiment of the utility model in the left turning state.

[0028] Figure 6 It is a structural schematic diagram of the steering mechanism of the embodiment of the utility model in the right turning state.

[0029] In the figure: 1, axle housing, 2, longitudinal drive rod, 3, first kingpin, 4 / 4', steering cylinder, 5, transmission connecting rod assembly, 51, right connecting rod, 52, tie rod, 53, left connecting rod, 6, articulated mechanism, 61, support frame, 62, ball bowl seat, 63, ball head, 7, second kingpin, 8, right wheel, 9, left wheel. 10', frame, 11', steering arm. DETAILED DESCRIPTION

[0030] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0031] like Figure 2-Figure 6 The utility model shown is a specific embodiment of a steering mechanism suitable for a steering drive axle, comprising: a longitudinal drive rod 2, a steering cylinder 4 and a transmission connecting rod assembly 5. In this embodiment, the longitudinal drive rod 2 is installed on the left wheel 9 or the right wheel 8 of the vehicle through the first kingpin 3, one end of the steering cylinder 4 is installed on the axle housing 1 through the hinge mechanism 6, and the other end is rotatably installed with the longitudinal drive rod 2, and the transmission connecting rod assembly 5 is installed between the left wheel 9 and the right wheel 8 of the vehicle to drive the two wheels to steer synchronously. When the vehicle is in the adjustment state, the distance from the mounting point of the steering cylinder 4 on the hinge mechanism 6 to the first kingpin 3 in the X-axis direction is L, and the distance from the center point of the axle housing 1 to the first kingpin 3 in the X-axis direction is D, wherein L>D.

[0032] The steering mechanism of the utility model sets the steering cylinder 4 horizontally, and sets an articulation mechanism 6 for installing the steering cylinder 4 on the axle housing 1, so that one end of the steering cylinder 4 is installed on the articulation mechanism 6, and the other end is connected to the longitudinal drive rod 2, and the connection point where the steering cylinder 4 is connected to the frame in the prior art is transformed into a connection point on the axle housing 1, solving the problem of large occupied space and inconvenient assembly and adjustment caused by the longitudinal setting of the steering cylinder 4 in the prior art. The utility model cleverly changes the movement direction of the steering cylinder 4, reduces the longitudinal rod system movement space, has high integration, and reduces the transmission points, which is convenient for the layout, installation and maintenance of the whole vehicle.

[0033] In this embodiment, in order to ensure that the wheel has a larger steering angle, when the vehicle is in the adjustment state, the distance between the mounting point of the steering cylinder 4 on the articulated mechanism 6 and the first kingpin 3 in the X-axis direction is greater than the distance between the center point of the axle housing 1 and the first kingpin 3 in the X-axis direction, so that the steering cylinder 4 drives the longitudinal drive rod 2 to rotate along the first kingpin 3. The rotation angle is -33.7°≤a≤+43°. When turning left, the rotation angle of the left wheel 9 is -43°≤a 左 ≤0°, the corresponding rotation angle of the right wheel 8 is -33.7°≤a 右 ≤0°. When turning right, the rotation angle of the right wheel 8 is 0°≤a 右 ≤43°, the corresponding rotation angle of the left wheel 9 is 0°≤a 左 ≤33.7°. That is, the articulated mechanism 6 in this embodiment is arranged at one end of the axle center that deviates from the installation of the longitudinal drive rod 2, so that the maximum wheel steering can reach 43 degrees. In this embodiment, the angle of rotation of the longitudinal drive rod 2 to the right along the first kingpin 3 driven by the steering cylinder 4 is positive, and the angle of rotation to the left is negative. It should be understood that the positive and negative angles are only a definition for the convenience of technical personnel in this embodiment to understand, and of course other definitions can also be used. There is no limitation on the angle of rotation of the longitudinal drive rod 2 to the left and right along the first kingpin 3.

[0034] In this embodiment, Figure 5 and Figure 6 As shown, when the steering cylinder 4 extends, it drives the longitudinal drive rod 2 to rotate clockwise along the first kingpin 3, and the vehicle turns right. When the steering cylinder 4 retracts, it drives the longitudinal drive rod 2 to rotate counterclockwise along the first kingpin 3, and the vehicle turns left. As an implementation method, one end of the longitudinal drive rod 2 in this embodiment is connected to the right wheel 8 of the vehicle through the first kingpin 3, and the right wheel 8 rotates with the longitudinal drive rod 2, and the corresponding left wheel 9 of the vehicle is rotatably mounted with the axle through the second kingpin 7. The right wheel 8 of the vehicle is rotatably mounted with one end of the axle through the first kingpin 3, and the left wheel 9 of the vehicle is rotatably mounted with the other end of the axle through the second kingpin 7.

[0035] like Figure 4 As shown, the articulated mechanism 6 in this embodiment includes a support frame 61 fixedly arranged on the axle housing 1, a ball bowl seat 62 installed on the support frame 61, and a ball head 63 installed at one end of the steering cylinder 4 and rotatably matched with the ball bowl seat 62, that is, a support frame 61 is provided on the axle housing 1, the support frame 61 can be welded to the axle housing, and can also be cast integrally with the axle housing, and the steering cylinder 4 and the support frame 61 are rotatably matched through the ball head 63 bearing to ensure a multi-angle rotation connection between the steering cylinder 4 and the support frame 61.

[0036] like Figure 2 and Figure 5 As shown, the transmission link assembly 5 includes a right link 51, a tie rod 52 and a left link 53 which are rotatably connected in sequence; the end of the right link 51 away from the tie rod 52 is fixedly connected to the corresponding left wheel 9 of the vehicle, and the end of the left link 53 away from the tie rod 52 is fixedly connected to the corresponding right wheel 8 of the vehicle. The arrangement of the transmission link assembly 5 ensures that the left wheel 9 can keep synchronization with the right wheel 8 and turn simultaneously.

[0037] It should be further explained that the first kingpin 3 and the second kingpin 7 in this embodiment are the pins of the drive axle. When installing the steering mechanism of the present application, one end of the longitudinal drive rod 2 is fixedly installed with the right wheel 8 through the first kingpin 3, and no additional fixing parts need to be added, which saves investment costs to a certain extent. The telescopic end of the steering cylinder 4 is rotatably installed with the longitudinal drive rod 2 to provide power for steering. When the steering cylinder 4 rotates forward, that is, Figure 5 As shown, the longitudinal drive rod 2 and the right wheel 8 are driven to turn left around the first kingpin 3, and then the left wheel 9 is pulled to turn left through the tie rod 52, thereby realizing the left turn of the vehicle. Figure 6 As shown, when the steering cylinder 4 moves in the reverse direction, all components move in the reverse direction to realize the right turn of the vehicle. In the steering mechanism of this embodiment, the arrangement of the steering cylinder 4 does not change the main structure of the axle. Only the hinge mechanism 6 is arranged on the axle housing 1. The longitudinal drive rod 2 is installed by the main shaft of the left wheel 9 or the right wheel 8 and the axle. By changing the active direction of the steering cylinder 4, while realizing the vehicle steering function, there are fewer rotation connection points, a simple structure, a small space occupation, and easy installation and adjustment, and good applicability.

[0038] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A steering mechanism suitable for a steering drive axle, characterized in that: include: A longitudinal drive rod (2) mounted on a left wheel (9) or a right wheel (8) of the vehicle via a first king pin (3); A steering cylinder (4), one end of which is mounted on the axle housing (1) via a hinge mechanism (6), and the other end of which is rotatably mounted on the longitudinal drive rod (2); A transmission connecting rod assembly (5) is installed between the left wheel (9) and the right wheel (8) of the vehicle and is used to drive the two wheels to turn synchronously; When the vehicle is in an alignment state, the distance between the mounting point on the articulated mechanism (6) and the steering cylinder (4) and the first kingpin (3) in the X-axis direction is L; the distance between the center point of the axle housing (1) and the first kingpin (3) in the X-axis direction is D; wherein L>D.

2. A steering mechanism suitable for a steering drive axle according to claim 1, characterized in that: The articulated mechanism (6) comprises a support frame (61) fixedly mounted on the axle housing (1), a ball bowl seat (62) mounted on the support frame (61), and a ball head (63) mounted on one end of the steering cylinder (4) and rotatably engaged with the ball bowl seat (62).

3. The steering mechanism suitable for a steering drive axle according to claim 1, characterized in that: The steering oil cylinder (4) drives the longitudinal drive rod (2) to rotate along the first kingpin (3) at an angle of -33.7°≤a≤+43°.

4. The steering mechanism suitable for a steering drive axle according to claim 1, characterized in that: When turning left, the rotation angle of the left wheel (9) is -43°≤a 左 ≤0°, the rotation angle of the right wheel (8) is -33.7°≤a 右 ≤0°; When turning right, the rotation angle of the right wheel (8) is 0°≤a 右 ≤43°, the rotation angle of the left wheel (9) is 0°≤a 左 ≤33.7°.

5. The steering mechanism suitable for a steering drive axle according to claim 1, characterized in that: One end of the longitudinal drive rod (2) is connected to the right wheel (8) of the vehicle via a first kingpin (3), and the right wheel (8) rotates following the longitudinal drive rod (2); the corresponding left wheel (9) of the vehicle is rotatably mounted on the axle via a second kingpin (7).

6. The steering mechanism suitable for a steering drive axle according to claim 5, characterized in that: The transmission connecting rod assembly (5) comprises a right connecting rod (51), a tie rod (52) and a left connecting rod (53) which are rotatably connected in sequence; one end of the right connecting rod (51) away from the tie rod (52) is fixedly connected to the corresponding left wheel (9) of the vehicle, and one end of the left connecting rod (53) away from the tie rod (52) is fixedly connected to the corresponding right wheel (8) of the vehicle.

7. The steering mechanism suitable for a steering drive axle according to claim 6, characterized in that: The right wheel (8) of the vehicle is rotatably mounted on one end of the axle via a first kingpin (3), and the left wheel (9) of the vehicle is rotatably mounted on the other end of the axle via a second kingpin (7).

8. A steering mechanism suitable for a steering drive axle according to any one of claims 1 to 7, characterized in that: When the steering cylinder (4) extends, it drives the longitudinal drive rod (2) to rotate clockwise along the first kingpin (3), and the vehicle turns right; When the steering cylinder (4) performs a contraction action, it drives the longitudinal drive rod (2) to rotate counterclockwise along the first kingpin (3), and the vehicle turns left.

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