Hydraulic trailer steering system

Abstract

The utility model discloses a hydraulic trailer steering system, which relates to the technical field of trailer steering and comprises a gooseneck traction frame and a steering system. A gooseneck rotation support and a steering encoder are arranged on the bottom face of the front end of the gooseneck traction frame, a rotation frame is arranged on the bottom face of the gooseneck rotation support, a traction pin is arranged on the bottom face of the rotation frame, a power take-off pin is arranged on the tail portion of the rotation frame, and after the traction pin is installed on the saddle, the power take-off pin is clamped in a notch in the tail end of the saddle. A deflector rod is arranged on one side of the steering encoder, one end of the deflector rod is connected with the rotating end of the steering encoder, and the other end of the deflector rod is connected with the reversing frame; the steering system is installed at the bottom of the rear frame and comprises a steering rotation support, an actuating oil cylinder, a bogie and a steering connecting rod, the bogie is installed on the rear frame, one end of the actuating oil cylinder is connected with a hinged shaft of the rear frame, and the other end of the actuating oil cylinder is connected with a hinged shaft of the bogie. According to the utility model, the steering response delay is eliminated, and the follow-up steering synchronism of the trailer is good.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer steering, in particular to a hydraulic trailer steering system. Background Art

[0002] Existing hydraulic trailers are all hydraulically driven and steered, that is, a steering signal cylinder is set in the power gooseneck traction frame. During operation, the rotation of the tractor drives the traction pin to rotate, and the traction pin drives the steering signal cylinder to extend and retract. The steering signal cylinder is connected to the steering cylinder on the trailer through a hydraulic pipeline, and the rotation displacement of the gooseneck traction frame signal cylinder is transmitted to the trailer steering cylinder through the oil in the long hydraulic oil pipeline. The trailer steering cylinder drives the steering linkage mechanism to realize the trailer follow-up steering.

[0003] The problem with the hydrostatic steering technology for hydraulic trailers is that when the trailer is long, the steering response time will be prolonged, and the long-distance hydraulic pipeline layout will cause many hydraulic pipeline failure points, making them difficult to detect and greatly increase the difficulty of maintenance. Utility Model Content

[0004] Based on the above problems, the purpose of the utility model is to provide a hydraulic trailer steering system, and the utility model adopts the following technical solutions:

[0005] The utility model provides a hydraulic trailer steering system, comprising:

[0006] A traction head, wherein a saddle is provided at the tail of the traction head, and a notch is provided at the tail end of the saddle;

[0007] A gooseneck traction frame, the rear end of which is connected to the hinge shaft of the rear frame, a gooseneck slewing support and a steering encoder are fixed to the bottom surface of the front end of the gooseneck traction frame, the center of the gooseneck slewing support coincides with the center of the steering encoder, a slewing frame is provided on the bottom surface of the gooseneck slewing support, a traction pin is provided on the bottom surface of the slewing frame, a power take-off pin is provided at the tail of the slewing frame, and after the traction pin is installed on the saddle, the power take-off pin is stuck in the notch at the tail end of the saddle; a lever is provided on one side of the steering encoder, one end of the lever is connected to the rotating end of the steering encoder, and the other end is connected to the slewing frame;

[0008] Steering system; the steering system includes a steering slewing support, an actuating cylinder, a bogie and a steering connecting rod, the upper end of the steering slewing support is installed on the bottom surface of the rear frame, the lower end surface of the steering slewing support is installed with a suspension wheel set, the bogie is rotatably connected to the rear frame through a pin shaft, a pair of actuating cylinders are arranged on one side of the bogie, one end of the actuating cylinder is connected to the rear frame hinge shaft, and the other end is connected to the end hinge shaft of the bogie; the two ends of the steering connecting rod are respectively connected to the bogie and the steering slewing support hinge shaft.

[0009] Preferably, the power take-off pin and the notch are both V-shaped structures.

[0010] Preferably, the steering system further comprises a steering sub-link, and two adjacent steering slewing supports are connected via the steering sub-link.

[0011] Preferably, a sensor for measuring the telescopic stroke is provided in the actuating cylinder.

[0012] Compared with the prior art, the beneficial technical effects of the utility model are:

[0013] The utility model eliminates the steering response delay, and the trailer has good follow-up steering synchronization. At the same time, the utility model simplifies the follow-up steering structure, which is beneficial to daily maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model will be further described below in conjunction with the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the main structure of the hydraulic trailer steering system in the embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the top view of the saddle in the embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of the gooseneck traction frame in the embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the top view of the steering system in the embodiment of the utility model.

[0019] Explanation of the reference numerals: 1. traction head; 101. saddle; 102. notch; 2. gooseneck traction frame; 201. gooseneck slewing support; 202. steering encoder; 203. slewing frame; 204. traction pin; 205. power take-off pin; 206. lever; 3. rear frame; 4. steering system; 401. steering slewing support; 402. actuator cylinder; 403. bogie; 404. steering connecting rod; 405. steering auxiliary connecting rod. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] like Figures 1 to 4As shown, this embodiment discloses a hydraulic trailer steering system, including a tractor head 1, a gooseneck tractor frame 2, a rear frame 3, a steering system 4 and a suspension wheel set 5. A saddle 101 is provided at the tail of the tractor head 1, and a notch 102 is provided at the tail end of the saddle 101. The rear end of the gooseneck tractor frame 2 is connected to the rear frame 3 by a hinge shaft.

[0022] The front end of the gooseneck traction frame 2 is hung and cooperated with the saddle 101. Specifically, a gooseneck swivel support 201 and a steering encoder 202 are fixed to the bottom surface of the front end of the gooseneck traction frame 2. The center of the steering encoder 202 coincides with the center of the gooseneck swivel support 201. A swivel frame 203 is arranged on the bottom surface of the gooseneck swivel support 201. The swivel frame 203 rotates with the gooseneck swivel support 201. A traction pin 204 is arranged at the center of the bottom surface of the swivel frame 203. A power take-off pin 205 is arranged at the tail of the swivel frame 203. When the traction pin 204 slides from the notch 102 into the hanging hole of the saddle 101, the power take-off pin 205 is then stuck in the notch 102 at the tail end of the saddle 101.

[0023] A lever 206 is provided on one side of the steering encoder 202, one end of the lever 206 is connected to the rotating end of the steering encoder 202, and the other end is connected to the rotating frame 203. When the rotating frame 203 rotates, the lever 206 is driven to rotate, and the rotation of the lever 206 drives the encoder 202 to rotate, that is, the encoder 202 detects the rotation signal of the rotating frame 203.

[0024] The steering system 4 is installed at the bottom of the rear frame 3. Specifically, the steering system 4 includes a steering slewing support 401, an actuating cylinder 402, a bogie 403 and a steering link 404. The upper end of the steering slewing support 401 is rotatably installed on the bottom surface of the rear frame 3. The lower end surface of the steering slewing support 401 is installed with a suspension wheel set 5. The bogie 403 is rotatably connected to the rear frame 3 through a pin shaft. A pair of actuating cylinders 402 are arranged on one side of the bogie 403. One end of the actuating cylinder 402 is connected to the hinge shaft of the rear frame 3, and the other end is connected to the hinge shaft at the end of the bogie 403. A sensor for measuring the telescopic stroke is provided in the actuating cylinder 402. The sensor can be a displacement sensor. The two ends of the steering link 404 are respectively connected to the bogie 403 and the steering slewing support 401 hinge shaft.

[0025] When the steering system 4 needs to control multiple suspension wheel sets 5, two adjacent steering slewing supports 401 are connected via a steering sub-link 405, and both ends of the steering sub-link 405 are hinge-connected to the corresponding steering slewing supports 401.

[0026] In this embodiment, the power take-off device 205 and the notch 102 are both V-shaped structures.

[0027] The action process of the utility model is as follows:

[0028] When using the electric drive steering system, first, the steering mode of the trailer chassis is determined according to the specific situation, and the traction head 1 is used to steer. When the traction head 1 is steered, the saddle 101 rotates around the traction pin 204, and the power take-off pin 205 stuck in the notch 102 at the rear end of the saddle 101 rotates synchronously with the saddle 101. When the power take-off pin 205 rotates, it drives the slewing frame 203 to rotate around the traction pin 204, and the gooseneck slewing support 201 is used between the slewing frame 203 and the gooseneck traction frame 2 to reduce the steering resistance. After the steering encoder 204 detects the rotation signal of the slewing frame 203 through the lever 206, the actuating cylinder 402 is actuated to perform telescopic movement according to the steering mode requirements, and the actuating cylinder 402 is telescopic to drive the bogie 403 to swing. During the swinging process of the bogie 403, the steering slewing support 401 is driven to rotate through the steering connecting rod 404, thereby realizing the synchronous rotation of multiple suspension wheel groups 5.

[0029] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A hydraulic trailer steering system, characterized in that: include: A traction head (1), wherein a saddle (101) is provided at the rear of the traction head (1), and a notch (102) is provided at the rear end of the saddle (101); A gooseneck traction frame (2), wherein the rear end of the gooseneck traction frame (2) is hingedly connected to a rear frame (3), a gooseneck slewing support (201) and a steering encoder (202) are fixed to the bottom surface of the front end of the gooseneck traction frame (2), the center of the gooseneck slewing support (201) coincides with the center of the steering encoder (202), a slewing frame (203) is arranged on the bottom surface of the gooseneck slewing support (201), and a traction pin (204) is arranged on the bottom surface of the slewing frame (203). A power take-off pin (205) is provided at the tail of the rotating frame (203); after the traction pin (204) is installed on the saddle (101), the power take-off pin (205) is stuck in the notch (102) at the tail end of the saddle (101); a lever (206) is provided on one side of the steering encoder (202); one end of the lever (206) is connected to the rotating end of the steering encoder (202), and the other end is connected to the rotating frame (203); A steering system (4); the steering system (4) comprises a steering slewing support (401), an actuating cylinder (402), a bogie (403) and a steering connecting rod (404); the upper end of the steering slewing support (401) is mounted on the bottom surface of the rear frame (3); the lower end surface of the steering slewing support (401) is mounted with a suspension wheel set (5); the bogie (403) is rotatably connected to the rear frame (3) via a pin shaft; a pair of actuating cylinders (402) are arranged on one side of the bogie (403); one end of the actuating cylinder (402) is connected to the hinge shaft of the rear frame (3), and the other end is connected to the end hinge shaft of the bogie (403); the two ends of the steering connecting rod (404) are respectively connected to the hinge shaft of the bogie (403) and the steering slewing support (401).

2. The hydraulic trailer steering system according to claim 1, characterized in that: The power take-off pin (205) and the notch (102) are both V-shaped structures.

3. The hydraulic trailer steering system according to claim 1, characterized in that: The steering system (4) further comprises a steering secondary connecting rod (405), and two adjacent steering slewing supports (401) are connected via the steering secondary connecting rod (405).

4. The hydraulic trailer steering system according to claim 1, characterized in that: The actuating oil cylinder (402) is provided with a sensor for measuring the telescopic stroke.

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