Straightening mechanism of trailer turntable

Abstract

The utility model discloses a straightening mechanism of a trailer turntable, which relates to the technical field of trailer turntables and comprises a main body unit, a protection unit and a damping unit, the protection unit and the damping unit are arranged in the main body unit, and the damping unit is positioned at the side part of the protection unit; the protection unit comprises two fixing supports installed on a trailer frame, a positioning support installed on the inner side wall of the main body unit and two sets of steel plate springs which are installed between the two fixing supports and are divided into bilateral symmetry from the middle through the positioning support. According to the straightening mechanism of the trailer rotary table, due to the arrangement of the protection unit and the damping unit, excessive steering between a tractor and a trailer is avoided, and the service life of the trailer rotary table is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of trailer turntable technology, and in particular to a straightening mechanism for a trailer turntable. Background Technology

[0002] The trailer turntable is an important assembly on a full trailer. It serves to steer, bear loads, and connect the main frame and the subframe. Most trailer turntable straightening mechanisms are simple: the upper and lower plates are locked by a locking pin extending after the air chamber is opened or closed, thus locking the upper and lower plates. Alternatively, a similar locking mechanism is used between the tractor frame (fixed to the upper plate) and the trailer frame (fixed to the lower plate), thus achieving relative straightening between the tractor and the trailer.

[0003] A search revealed a trailer turntable structure in Publication No. CN220682480U, comprising an upper turntable and a lower turntable. The upper and lower turntables are connected by ball bearings within an annular fluid channel on their mating surfaces. The upper turntable has an upper oil channel, and the lower turntable has a lower oil channel. The lower oil channel is serrated. The upper oil channel, lower oil channel, and annular fluid channel are interconnected. The serrated lower oil channel of this invention can block the lubricating oil in the annular fluid channel, preventing the lubricating oil from flowing out quickly through the lower oil channel, reducing resource waste, improving lubrication effect, and increasing the overall service life of the turntable through effective lubrication of the ball bearings.

[0004] While the above solution can increase the overall service life of the turntable through effective lubrication of the balls, the trailer turntable lacks a limiting mechanism when turning. When the upper turntable rotates too much, it can easily cause over-steering between the tractor and the trailer. Therefore, we propose a straightening mechanism for the trailer turntable. Utility Model Content

[0005] The main purpose of this utility model is to provide a straightening mechanism for a trailer turntable. By setting up a protective unit and a shock absorption unit, it solves the problem that the trailer turntable lacks a limiting mechanism, which can easily cause excessive steering between the tractor and the trailer when the upper turntable rotates too much.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A straightening mechanism for a trailer turntable includes a main unit, and also includes a protective unit and a shock-absorbing unit disposed inside the main unit, wherein the shock-absorbing unit is located on the side of the protective unit.

[0008] The protective unit includes two fixed brackets installed on the trailer frame, a positioning bracket installed on the inner side wall of the main unit, and two sets of leaf springs installed between the two fixed brackets and divided symmetrically by the positioning bracket from the middle.

[0009] The damping unit includes a fixed seat installed on the inner wall of the main unit, a damper movably installed inside the fixed seat, and a connecting seat movably installed on the telescopic end of the damper.

[0010] Preferably, the main body unit includes a lower plate, an upper plate movably mounted on top of the lower plate, and a locking member disposed below the lower plate.

[0011] Preferably, the main body unit further includes a locking seat installed on the side walls of the upper and lower plates.

[0012] Preferably, the locking component includes a locking air chamber disposed below the chassis and fixedly connected to the vehicle frame, and a locking pin installed at the telescopic end of the locking air chamber.

[0013] Preferably, the shock absorption unit further includes a limiting block installed on the inner side wall of the upper plate.

[0014] Preferably, the shock absorption unit consists of two sets, and the two sets of shock absorption units are symmetrically arranged about the protective unit.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In this invention, through the protection unit and shock absorption unit, when it is necessary to achieve relative straight travel between the tractor and the trailer, the locking air chamber works, causing the locking pin to extend and pass through the locking seats installed on the side walls of the upper and lower plates in sequence, completing the relative locking between the upper and lower plates and achieving stable straight-line travel of the tractor and the trailer. When it is necessary to achieve relative turning between the tractor and the trailer, when the upper plate is rotated counterclockwise, the positioning bracket on the upper plate moves to the left against the left part of the leaf spring. The left part of the leaf spring deforms under force, thereby generating a rightward damping force on the upper plate. The damping force increases with the degree of deformation of the leaf spring. At the same time, the shock absorbers on the left and right sides undergo compression and tension movements respectively, thus playing a shock absorption role. As the rotation amplitude of the upper plate increases, when the limiting block on the inner side of the upper plate hits the fixed bracket fixed on the trailer frame, the turning limit between the upper and lower plates is reached, avoiding excessive turning between the tractor and the trailer and extending the service life of the trailer turntable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the top view of the present invention. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the top view of the present invention. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the main structure of this utility model.

[0022] In the picture:

[0023] 1. Main unit; 101. Upper plate; 102. Lower plate; 103. Locking component; 1031. Locking air chamber; 1032. Locking pin; 104. Locking seat;

[0024] 2. Protective unit; 201. Fixed bracket; 202. Positioning bracket; 203. Leaf spring;

[0025] 3. Vibration damping unit; 301. Fixing base; 302. Vibration damper; 303. Connecting base; 304. Limiting block. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments. Example

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, a straightening mechanism for a trailer turntable includes a main body unit 1, and also includes a protective unit 2 and a shock-absorbing unit 3 disposed inside the main body unit 1, with the shock-absorbing unit 3 located on the side of the protective unit 2.

[0028] like Figure 2 As shown, the protective unit 2 includes two fixed brackets 201 installed on the trailer frame, a positioning bracket 202 installed on the inner side wall of the main unit 1, and two sets of steel leaf springs 203 installed between the two fixed brackets 201 and divided symmetrically by the positioning bracket 202. The steel leaf springs 203 can generate a damping force on the upper plate 101 when turning, thus playing a role in hindering the turn. When the upper plate 101 returns to its original position under force, it will be assisted by the spring force of the steel leaf springs 203.

[0029] like Figure 4 As shown, the shock absorption unit 3 includes a fixed seat 301 installed on the inner side wall of the main unit 1, a shock absorber 302 movably installed inside the fixed seat 301, and a connecting seat 303 movably installed on the telescopic end of the shock absorber 302. The shock absorber 302 can reduce the vibration impact on the upper plate 101 when the tractor and trailer turn relative to each other.

[0030] like Figure 1 As shown, the main unit 1 includes a lower plate 102, an upper plate 101 movably mounted on top of the lower plate 102, and a locking member 103 disposed below the lower plate 102. The lower plate 102 is mounted on the trailer frame, and the upper plate 101 is mounted on the tractor frame.

[0031] like Figure 5 As shown, the main body unit 1 also includes a locking seat 104 installed on the side walls of the upper plate 101 and the lower plate 102. The locking seat 104 is provided to facilitate the use of the locking member 103 to achieve locking and fixing between the upper plate 101 and the lower plate 102.

[0032] like Figure 3 As shown, the locking component 103 includes a locking air chamber 1031 located below the lower chassis 102 and fixedly connected to the frame, and a locking pin 1032 installed at the telescopic end of the locking air chamber 1031. When the locking air chamber 1031 is ventilated or de-ventilated, the locking pin 1032 can be extended and retracted respectively.

[0033] like Figure 3 and Figure 4 As shown, the shock absorption unit 3 consists of two sets, and the two sets of shock absorption units 3 are symmetrically arranged about the protection unit 2, so that the trailer turntable can be limited and protected when turning left or right.

[0034] When it is necessary to achieve relative straight travel between the tractor and the trailer, the locking air chamber 1031 is activated, causing the locking pin 1032 to extend. The locking pin 1032 then passes through the locking seat 104 installed on the side walls of the upper plate 101 and the lower plate 102 in sequence, completing the relative locking between the upper plate 101 and the lower plate 102, and achieving stable straight-line travel of the tractor and the trailer. Example

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, a straightening mechanism for a trailer turntable includes a main body unit 1, and also includes a protective unit 2 and a shock-absorbing unit 3 disposed inside the main body unit 1, with the shock-absorbing unit 3 located on the side of the protective unit 2.

[0036] like Figure 2As shown, the protective unit 2 includes two fixed brackets 201 installed on the trailer frame, a positioning bracket 202 installed on the inner side wall of the main unit 1, and two sets of steel leaf springs 203 installed between the two fixed brackets 201 and divided symmetrically by the positioning bracket 202. The steel leaf springs 203 can generate a damping force on the upper plate 101 when turning, thus playing a role in hindering the turn. When the upper plate 101 returns to its original position under force, it will be assisted by the spring force of the steel leaf springs 203.

[0037] like Figure 4 As shown, the shock absorption unit 3 includes a fixed seat 301 installed on the inner side wall of the main unit 1, a shock absorber 302 movably installed inside the fixed seat 301, and a connecting seat 303 movably installed on the telescopic end of the shock absorber 302. The shock absorber 302 can reduce the vibration impact on the upper plate 101 when the tractor and trailer turn relative to each other.

[0038] like Figure 1 As shown, the main unit 1 includes a lower plate 102, an upper plate 101 movably mounted on top of the lower plate 102, and a locking member 103 disposed below the lower plate 102. The lower plate 102 is mounted on the trailer frame, and the upper plate 101 is mounted on the tractor frame.

[0039] like Figure 5 As shown, the main body unit 1 also includes a locking seat 104 installed on the side walls of the upper plate 101 and the lower plate 102. The locking seat 104 is provided to facilitate the use of the locking member 103 to achieve locking and fixing between the upper plate 101 and the lower plate 102.

[0040] like Figure 3 As shown, the locking component 103 includes a locking air chamber 1031 located below the lower chassis 102 and fixedly connected to the frame, and a locking pin 1032 installed at the telescopic end of the locking air chamber 1031. When the locking air chamber 1031 is ventilated or de-ventilated, the locking pin 1032 can be extended and retracted respectively.

[0041] like Figure 4 As shown, the shock absorption unit 3 also includes a limiting block 304 installed on the inner side wall of the upper plate 101. The setting of the limiting block 304, together with the positioning bracket 202, can serve as a warning of the steering limits of the upper plate 101 and the lower plate 102.

[0042] like Figure 3 and Figure 4 As shown, the shock absorption unit 3 consists of two sets, and the two sets of shock absorption units 3 are symmetrically arranged about the protection unit 2, so that the trailer turntable can be limited and protected when turning left or right.

[0043] When relative steering between the tractor and trailer is required, the upper plate 101 rotates counterclockwise. The positioning bracket 202 on the upper plate 101 pushes against the left side of the leaf spring 203 and moves to the left. The left side of the leaf spring 203 deforms under force, thus generating a rightward damping force on the upper plate 101. The damping force increases with the degree of deformation of the leaf spring 203. At the same time, the shock absorbers 302 on the left and right sides undergo compression and tension movements, respectively, and play a shock absorption role. As the rotation amplitude of the upper plate 101 increases, when the limiting block 304 on the inner side of the upper plate 101 pushes against the fixed bracket 201 fixed on the trailer frame, the steering limit between the upper plate 101 and the lower plate 102 is reached. This avoids excessive steering between the tractor and trailer, extends the service life of the trailer turntable, and also ensures that the leaf spring 203 and the shock absorber 302 work within their own stroke range to avoid damage.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A straightening mechanism of a trailer turntable, comprising a main unit (1), characterized in that, The protective unit (2) and the damping unit (3) are arranged inside the main unit (1), and the damping unit (3) is arranged on the side of the protective unit (2); The protective unit (2) comprises two fixed supports (201) arranged on the trailer frame, a positioning support (202) arranged on the inner side wall of the main unit (1), and two groups of steel plate springs (203) arranged between the two fixed supports (201) and symmetrically divided by the positioning support (202); The damping unit (3) comprises a fixed seat (301) arranged on the inner side wall of the main unit (1), a shock absorber (302) movably arranged in the fixed seat (301), and a connecting seat (303) movably arranged on the telescopic end of the shock absorber (302).

2. A straightening mechanism for a turntable landing gear for a trailer as defined in claim 1, wherein: The main unit (1) comprises a lower disc (102), an upper disc (101) movably arranged on the top of the lower disc (102), and a locking member (103) arranged below the lower disc (102).

3. A straightening mechanism for a turntable landing gear for a trailer as defined in claim 2 wherein: The main unit (1) further comprises a clamping seat (104) arranged on the side wall of the upper disc (101) and the lower disc (102).

4. A straightening mechanism for a turntable landing gear for a trailer as defined in claim 3 wherein: The locking member (103) comprises a locking air chamber (1031) arranged below the lower disc (102) and fixedly connected with the frame, and a locking pin (1032) arranged on the telescopic end of the locking air chamber (1031).

5. The straightening mechanism for a turntable landing gear of a trailer of claim 2 wherein: The damping unit (3) further comprises a limiting block (304) arranged on the inner side wall of the upper disc (101).

6. A straightening mechanism for a turntable landing gear for a trailer as defined in claim 5 wherein: The damping unit (3) comprises two groups, and the two groups of damping units (3) are symmetrically arranged with respect to the protective unit (2).

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