Traction device for middle axle trailer

Abstract

The utility model relates to the technical field of trailer traction, and discloses a traction device for a centrally-mounted axle trailer, which comprises a fixed plate, a connecting block I is fixedly connected to the bottom of an inner cavity of the fixed plate, a sleeve rod is movably connected to the right part of the connecting block I through an axle, and a buffer ring is movably connected to the middle of the sleeve rod in a sleeving manner; the middle of the sleeve rod is fixedly sleeved with a limiting ring, the right portion of an inner cavity of the sleeve rod is movably sleeved with a buffering rod, a first buffering spring is fixedly installed on the left portion of the inner cavity of the sleeve rod, the right end of the first buffering spring is fixedly installed at the left end of the buffering rod, and a traction hook is fixedly installed at the right end of the buffering rod. The upper portion of the second connecting block is movably connected with a first buffering block through a shaft, a first buffering spring provides transverse buffering, dislocation of the traction position caused by inertia is prevented, the safety of the device is improved, a second buffering spring provides vertical buffering, the influence of road bumping is relieved, abrasion is relieved, and the durability and stability of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer traction, in particular to a traction device for a mid-axle trailer. Background Art

[0002] Trailers are important means of transportation in road transportation. Among the many types of trailers, there is a mid-axle trailer, which is a trailer with an axle located close to the center of gravity of the trailer. The main weight is borne by the trailer, and the main vehicle bears a very small part of the weight of the trailer. The mid-axle trailer itself has no power. Compared with a full trailer, the mid-axle trailer has a larger tonnage of load. The mid-axle trailer is more common. Because of its large carrying capacity, it is particularly suitable for long-distance and road transportation, and has become an important means of transportation in road transport vehicles. The traction device plays a vital role in the driving process of the trailer.

[0003] In the prior art, the connection between the tractor and the trailer of a mid-axle trailer is rigid, and no buffer device is provided. Due to its simple structure, it is easy to operate and maintain. However, when braking is encountered during driving, the trailer has a large inertia due to its own heavy load, and cannot be braked in time, resulting in misalignment between the trailer and the tractor, which causes traffic risks. When driving on bumpy roads, since the connection structure cannot swing up and down, the connection part may be damaged and the trailer may be detached, causing great economic losses. Therefore, in order to solve the above problems, the utility model proposes a traction device for a mid-axle trailer. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a traction device for a mid-axle trailer, which provides lateral buffering through a buffer spring 1 to prevent inertia from causing dislocation of the traction point, avoid traffic risks, and improve the safety of the traction device; provides vertical buffering through a buffer spring 2 to alleviate the impact of road bumps on the traction connection, reduce the wear of the device due to vibration, improve durability and stability, and improve the working efficiency of the device.

[0005] The utility model provides the following technical solutions: a traction device for a mid-axle trailer, comprising a fixed plate, a connecting block 1 being fixedly connected to the bottom of an inner cavity of the fixed plate, a sleeve rod being movably connected to the right portion of the connecting block 1 through an axis, a buffer ring being movably sleeved on the middle portion of the sleeve rod, a limiting ring being fixedly sleeved on the middle portion of the sleeve rod, two limiting rings being respectively located on the left and right sides of the buffer ring, a buffer rod being movably sleeved on the right portion of an inner cavity of the sleeve rod, a buffer spring 1 being fixedly installed on the left portion of the inner cavity of the sleeve rod, a right end of the buffer spring 1 being fixedly installed on the left end of the buffer rod, and a traction hook being fixedly installed on the right end of the buffer rod.

[0006] Preferably, a connecting block 2 is fixedly mounted on the upper portion of the buffer ring, the connecting block 2 is in two quantity and is symmetrically distributed front to back, and the upper portion of the connecting block 2 is movably connected to the buffer block 1 via an axis.

[0007] Preferably, a first shock filter plate is fixedly connected to the upper portion of the buffer block, a telescopic rod is fixedly installed on the upper portion of the shock filter plate, and a second shock filter plate is fixedly installed on the upper portion of the telescopic rod.

[0008] Preferably, a second buffer spring is arranged outside the telescopic rod, the bottom end of the second buffer spring is fixedly mounted on the upper part of the first shock filter plate, and the top end of the second buffer spring is fixedly mounted on the bottom of the second shock filter plate.

[0009] Preferably, a buffer block 2 is fixedly connected to the upper portion of the second shock filter plate, a connecting block 3 is movably connected to the upper portion of the second buffer block via an axis, and the connecting block 3 is fixedly installed on the top of the inner cavity of the fixed plate.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. Buffer spring 1 is provided to provide horizontal buffer. When braking is encountered during driving, the tractor brakes first, and the trailer still moves forward under the action of inertia. The trailer drives the buffer rod forward through the towing hook. During the movement of the buffer rod, the buffer spring 1 in the inner cavity of the sleeve rod is compressed. The buffer spring 1 generates elastic potential energy to slow down the movement of the buffer rod, thereby providing buffer for the trailer behind, reducing the influence of inertia, avoiding the misalignment of the trailer and the tractor due to excessive inertia, reducing the occurrence of traffic risks, and effectively improving the safety of the traction device.

[0012] 2. A buffer spring 2 is provided to provide vertical buffering. When encountering a bumpy road during driving, the trailer drives the buffer rod to swing up and down through the towing hook, and the buffer rod drives the sleeve rod to swing up and down. During the swinging of the sleeve rod, the connecting block 2 is driven to move, and the connecting block 2 drives the buffer block 1 to move, and the buffer block 1 drives the shock filter plate 1 to move, and the shock filter plate 1 drives the telescopic rod to expand and contract. At the same time, the buffer spring 2 is deformed due to the movement of the shock filter plate 1, thereby generating elastic potential energy, providing a buffering effect for the up and down movement of the sleeve rod, effectively reducing the impact of vibration on the connection between the tractor and the trailer, preventing the traction device from being damaged due to vibration, and improving the durability and stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the exterior structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0015] Figure 3This is a cross-sectional schematic diagram of the buffer structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the buffer rod of the utility model.

[0017] In the figure: 1. fixing plate; 2. connecting block 1; 3. sleeve rod; 4. buffer ring; 5. limiting ring; 6. buffer rod; 7. buffer spring 1; 8. traction hook; 9. connecting block 2; 10. buffer block 1; 11. shock filter plate 1; 12. telescopic rod; 13. shock filter plate 2; 14. buffer spring 2; 15. buffer block 2; 16. connecting block 3. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-Figure 4 A traction device for a mid-axle trailer comprises a fixing plate 1, a connecting block 2 is fixedly connected to the bottom of the inner cavity of the fixing plate 1, a sleeve rod 3 is movably connected to the right part of the connecting block 2 through an axis, a buffer ring 4 is movably sleeved in the middle of the sleeve rod 3, a limiting ring 5 is fixedly sleeved in the middle of the sleeve rod 3, and the number of limiting rings 5 ​​is two and they are respectively located on the left and right sides of the buffer ring 4, a buffer rod 6 is movably sleeved in the right part of the inner cavity of the sleeve rod 3, a buffer spring 7 is fixedly installed in the left part of the inner cavity of the sleeve rod 3, the right end of the buffer spring 7 is fixedly installed on the left end of the buffer rod 6, and a traction hook 8 is fixedly installed on the right end of the buffer rod 6. First, the fixing plate 1 is fixedly installed on the traction On the chassis of the towing vehicle, the trailer to be towed is fixed by the towing hook 8. When the towing vehicle encounters brakes during driving, the towing vehicle brakes first, and the trailer still moves forward under the action of inertia. The trailer drives the buffer rod 6 to move forward through the towing hook 8. During the movement of the buffer rod 6, the buffer spring 7 in the inner cavity of the sleeve rod 3 is compressed, and the buffer spring 7 generates elastic potential energy to slow down the movement of the buffer rod 6, thereby providing a buffer for the trailer behind, reducing the influence of inertia, avoiding the misalignment of the trailer and the towing vehicle due to excessive inertia, reducing the occurrence of traffic risks, and effectively improving the safety of the towing device;

[0020] A connecting block 2 9 is fixedly installed on the upper part of the buffer ring 4. The number of connecting blocks 2 9 is two and they are symmetrically distributed front and back. A buffer block 10 is movably connected to the upper part of the connecting block 2 9 through an axis. A shock filter plate 11 is fixedly connected to the upper part of the buffer block 10. A telescopic rod 12 is fixedly installed on the upper part of the shock filter plate 11. A shock filter plate 2 13 is fixedly installed on the upper part of the telescopic rod 12. A buffer spring 2 14 is arranged outside the telescopic rod 12. The bottom end of the buffer spring 2 14 is fixedly installed on the upper part of the shock filter plate 11. The top end of the buffer spring 2 14 is fixedly installed on the bottom of the shock filter plate 2 13. A buffer block 2 15 is fixedly connected to the upper part of the shock filter plate 2 13. The upper part of the buffer block 2 15 is movably connected to a connecting block 3 16 through an axis. The connecting block 3 16 is fixedly installed in the fixed plate 1 At the top of the cavity, when encountering a bumpy road section during driving, the trailer drives the buffer rod 6 to swing up and down through the towing hook 8, and the buffer rod 6 drives the sleeve rod 3 to swing up and down. During the swinging process of the sleeve rod 3, the connecting block 29 is driven to move, and the connecting block 29 drives the buffer block 10 to move, and the buffer block 10 drives the shock filter plate 11 to move, and the shock filter plate 11 drives the telescopic rod 12 to expand and contract. At the same time, the buffer spring 2 14 is deformed due to the movement of the shock filter plate 11, thereby generating elastic potential energy, which provides a buffering effect for the up and down movement of the sleeve rod 3, effectively reducing the impact of vibration on the connection between the tractor and the trailer, and preventing the traction device from being damaged due to vibration, so that the durability and stability of the device are improved, which is beneficial to improving the working efficiency of the device.

[0021] Working principle: first, fix the fixing plate 1 on the chassis of the tractor, and fix the trailer to be towed by the towing hook 8. When encountering brakes during driving, the tractor brakes first, and the trailer still moves forward under the action of inertia. The trailer drives the buffer rod 6 to move forward through the towing hook 8. During the movement of the buffer rod 6, the buffer spring 7 in the inner cavity of the sleeve rod 3 is compressed, and the buffer spring 7 generates elastic potential energy to slow down the movement of the buffer rod 6, thereby providing buffering for the rear trailer and reducing the influence of inertia. When encountering a bumpy road section during driving, the trailer drives the buffer rod 6 to swing up and down through the towing hook 8, and the buffer rod 6 drives the sleeve rod 3 to swing up and down. During the swinging of the sleeve rod 3, it drives the connecting block 2 9 to move, and the connecting block 2 9 drives the buffer block 10 to move. The buffer block 10 drives the shock filter plate 11 to move, and the shock filter plate 11 drives the telescopic rod 12 to telescope. At the same time, the buffer spring 2 14 is deformed due to the movement of the shock filter plate 11, thereby generating elastic potential energy to provide a buffering effect for the up and down movement of the sleeve rod 3.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A traction device for a center axle trailer, comprising a fixing plate (1), characterized in that: A connecting block (2) is fixedly connected to the bottom of the inner cavity of the fixing plate (1); a sleeve rod (3) is movably connected to the right part of the connecting block (2) through an axis; a buffer ring (4) is movably sleeved on the middle part of the sleeve rod (3); a limit ring (5) is fixedly sleeved on the middle part of the sleeve rod (3); two limit rings (5) are respectively located on the left and right sides of the buffer ring (4); a buffer rod (6) is movably sleeved on the right part of the inner cavity of the sleeve rod (3); a buffer spring (7) is fixedly installed on the left part of the inner cavity of the sleeve rod (3); the right end of the buffer spring (7) is fixedly installed on the left end of the buffer rod (6); and a traction hook (8) is fixedly installed on the right end of the buffer rod (6).

2. A traction device for a central axle trailer according to claim 1, characterized in that: A second connecting block (9) is fixedly mounted on the upper part of the buffer ring (4); the second connecting block (9) is in two numbers and is symmetrically distributed front to back; and a first buffer block (10) is movably connected to the upper part of the second connecting block (9) via an axis.

3. A traction device for a central axle trailer according to claim 2, characterized in that: The upper portion of the buffer block 1 (10) is fixedly connected to a shock filter plate 1 (11), the upper portion of the shock filter plate 1 (11) is fixedly mounted with a telescopic rod (12), and the upper portion of the telescopic rod (12) is fixedly mounted with a shock filter plate 2 (13).

4. A traction device for a central axle trailer according to claim 3, characterized in that: A second buffer spring (14) is arranged outside the telescopic rod (12); the bottom end of the second buffer spring (14) is fixedly mounted on the upper part of the first shock filter plate (11); and the top end of the second buffer spring (14) is fixedly mounted on the bottom of the second shock filter plate (13).

5. The traction device for a central axle trailer according to claim 3, characterized in that: The upper part of the second shock filter plate (13) is fixedly connected to a second buffer block (15), and the upper part of the second buffer block (15) is movably connected to a third connection block (16) via an axis, and the third connection block (16) is fixedly installed on the top of the inner cavity of the fixed plate (1).

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