Tractor buffering mechanism

Abstract

The utility model belongs to the field of mechanical structure design, and provides a tractor buffering mechanism which comprises a connector (1), a movable steel sleeve (2), a front baffle (3), a buffering spring (4), a rear baffle (5), a screw (6), a lining (7), a blocking piece (8) and a nut (9). The front baffle (3) is welded to the foremost end of the trailer draw bar body, the rear baffle (5) is welded to the inner side of the middle of the trailer draw bar body, the two bushings (7) are symmetrically installed on the inner side of the front baffle (3) and the inner side of the rear baffle (5) through the screws (6), the two movable steel sleeves (2) are symmetrically installed on the bushings front and back, and the buffer spring (4) is arranged between the front baffle (3) and the rear baffle (5). The connector (1) penetrates through the front baffle (3), the buffer spring (4) and the rear baffle (5) from the front end of the trailer traction rod body and is fixed through the blocking piece (8) and the nut (9).

Description

Technical Field

[0001] The utility model belongs to the field of mechanical structure design and relates to a tractor buffer mechanism. Background Art

[0002] At present, the working mode of transporting goods composed of a tractor and a trailer is highly efficient and has been widely used in the civilian field. Generally, the towing rod and the towing head of the trailer are an integrated structure, and its buffer mechanism can only realize the buffering function when the trailer is braked. When the transported goods are heavy, when the trailer starts to drive, it will also cause a violent impact or collision between the trailer and the rear of the tractor, posing certain safety hazards. The general solution is to install two springs on the towing rod of the trailer so that the springs can be compressed in two directions, or to install an oil or gas control system on the trailer so that the trailer behind can brake or slow down following the tractor to offset the inertia force, but it is necessary to reserve pipelines for the trailer on the tractor or trailer in advance, which greatly increases the technical complexity, production cost and structural size of the product. Utility Model Content

[0003] The purpose of the utility model is to design a tractor buffer mechanism with simple structure, low cost and quick and convenient installation.

[0004] To solve this technical problem, the technical solution of the utility model is as follows:

[0005] A tractor buffer mechanism, comprising:

[0006] Connector 1, movable steel sleeve 2, front baffle 3, buffer spring 4, rear baffle 5, bushing 7, baffle 8, nut 9;

[0007] A front baffle 3 is welded to the front end of the trailer traction rod body, and a rear baffle 5 is welded to the rear inner side of the trailer traction rod body. The front end of the connector 1 is connected to the tractor, and the rear end of the connector 1 passes through the front baffle 3, the buffer spring 4 and the rear baffle 5. After the rear end of the connector 1 passes through the rear baffle 5, it is limited by a baffle 8 and a nut 9; a pair of bushings 7 are symmetrically installed on the inner sides of the front baffle 3 and the rear baffle 5, and a movable steel sleeve 2 is installed on each bushing 7. The movable steel sleeve 2 and the bushing 7 are stepped shaft structures, and the front baffle 3 and the rear baffle 5 are stepped hole structures.

[0008] The bushing 7 is symmetrically mounted on the inner sides of the front baffle 3 and the rear baffle 5 by means of screws 6 .

[0009] The connector 1 is composed of a traction ring 10, a connecting rod 11, and a cylindrical pin 12. The front end outer circle of the connecting rod 11 is interference fit with the inner hole of the traction ring 10. After the connecting rod 11 and the traction ring 10 are assembled, a through hole for installing the cylindrical pin 12 is processed, and the hole is interference fit with the cylindrical pin 12.

[0010] A "V"-shaped groove is processed at the front end of the connecting rod 11, the length of the groove is greater than the depth of the inner hole of the traction ring 10, and the rear end of the connecting rod 11 is an external thread. A baffle 8 is assembled on the threaded section, and two nuts 9 are arranged on the outside of the baffle 8.

[0011] The traction ring 10 and the connecting rod 11 are made of high-strength 45# steel.

[0012] The movable steel sleeve 2 is made of high-strength 40Cr material, and the bushing 7 is made of wear-resistant QSn4-3 tin bronze material.

[0013] Beneficial effects of the utility model: The tractor buffer mechanism of the utility model does not need oil or gas circuit drive, and only relies on inertia force to compress and deform the spring through a mechanical structure equipped with a spring to achieve the buffering function. The buffer mechanism has a simple structure, occupies a small installation space, has reliable strength, is easy to process and assemble, and greatly reduces the technical complexity and production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the composition of the tractor buffer mechanism of the utility model;

[0015] Figure 2 This is a schematic diagram of the installation of the tractor buffer mechanism of the utility model;

[0016] Figure 3 This is a schematic diagram of the connector composition of the utility model;

[0017] Figure 4 This is a schematic diagram of the connecting rod structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the working state of the tractor buffer mechanism of the utility model when the trailer starts to travel;

[0019] Figure 6 It is a schematic diagram of the working state of the tractor buffer mechanism of the utility model when the trailer is braked or decelerated;

[0020] 1 Connecting head, 2 movable steel sleeve, 3 front baffle, 4 buffer spring, 5 rear baffle, 6 screw, 7 bushing, 8 baffle, 9 nut, 10 traction ring, 11 connecting rod, 12 cylindrical pin. DETAILED DESCRIPTION

[0021] The utility model is further described below with reference to the accompanying drawings and examples.

[0022] like Figure 1 , Figure 2As shown, the front baffle 3 and the rear baffle 5 are mounting carriers for other parts, which are respectively welded to the front end and the inner middle position of the trailer traction rod body. The front baffle 3 and the rear baffle 5 are processed with stepped holes of the same size. When welding, the stepped holes are symmetrical and concentric, with the large diameter hole facing outward and the small diameter hole facing inward. At the same time, a certain number of threaded through holes are processed on the circumferential distribution of the stepped holes for fixing the bushing 7.

[0023] The bushing 7 is made of wear-resistant QSn4-3 tin bronze, which reduces the wear of the movable steel sleeve 2 during the sliding process in its inner hole. The bushing 7 has a stepped shaft structure and is fixed in the stepped holes of the front baffle 3 and the rear baffle 5 by screws 6. The outer diameter of the bushing 7 is clearance-matched with the inner diameter of the front baffle 3 and the rear baffle 5.

[0024] The movable steel sleeve 2 is made of high-strength 40Cr to ensure sufficient strength when compressing the buffer spring 4. The movable steel sleeve 2 has a stepped shaft structure and is symmetrically installed in the inner hole of the bushing 7, with the small diameter end located on the outside and the large diameter end located on the inside. The small diameter end of the movable steel sleeve 2 and the inner hole of the bushing 7 are clearance-matched, and grease is applied when the movable steel sleeve 2 is installed to make the movable steel sleeve 2 slide smoothly.

[0025] The connecting head 1 is the main load-bearing mechanism. The connecting head 1 passes through the front baffle 3, the buffer spring 4 and the rear baffle 5 from front to back. The buffer spring 4 is installed in the middle position of the connecting head 1 and is placed between two movable steel sleeves 2. The connecting head 1 is firmly fixed by the baffle 8 and the nut 9 at the rear. The baffle 8 is completely fitted with the movable steel sleeve 2 installed on the rear baffle 5.

[0026] The buffer spring 4 is a standard cylindrical helical compression spring, and the two ends are tightly coiled and ground flat, and its free length is smaller than the inner distance between the front baffle 3 and the rear baffle 5, so that the buffer spring 4 has a certain preload force when installed, and is ergonomic and can be installed by one person. At the same time, the outer diameter of the buffer spring 4 is smaller than the large diameter end of the movable steel sleeve 2, ensuring that the buffer spring 4 is completely fitted with the movable steel sleeve 2 when compressed.

[0027] like Figure 3 As shown, the connector 1 is composed of a traction ring 10, a connecting rod 11, and a cylindrical pin 12. The traction ring 10 and the connecting rod 11 are made of 45# steel to ensure that the connector 1 has a high strength. The front end outer circle of the connecting rod 11 is interference fit with the inner hole of the traction ring 10. After the connecting rod 11 and the traction ring 10 are assembled, a through hole for installing the cylindrical pin 12 is processed. The hole and the cylindrical pin 12 are interference fit, which can make the traction ring 10 and the connecting rod 11 connected firmly. When the connector 1 is assembled, the rear end of the traction ring 10 is completely fitted with the small diameter end face of the movable steel sleeve 2, ensuring that the buffer spring 4 can be compressed immediately when the buffer mechanism is subjected to inertial force.

[0028] like Figure 4As shown, a "V"-shaped groove is processed at the front end of the connecting rod 11, and the length of the groove is slightly greater than the depth of the inner hole of the traction ring 10. When the connecting rod 11 and the traction ring 10 are assembled, the air in the inner hole of the traction ring 10 can be discharged, which is convenient for assembly. The rear end of the connecting rod 11 is an external thread, and a baffle 8 is assembled on the threaded section. Two nuts 9 are arranged on the outside of the baffle 8 to prevent the baffle 8 from falling out.

[0029] like Figure 5 As shown, when the towing trailer starts, the connector 1 will move forward between the front baffle 3 and the rear baffle 5 along with the vehicle, and the baffle 8 at the rear of the connector 1 will push the movable steel sleeve 2 at the rear to move forward synchronously, while compressing the buffer spring 4, so that the impact force caused by the sudden start of the trailer is buffered and the trailer starts smoothly.

[0030] like Figure 6 As shown, when the towing trailer brakes or slows down, the tail of the towing ring 10 of the connector 1 pushes the front movable steel sleeve 2 to move backwards and compresses the buffer spring 4, so that the impact force caused by the sudden braking or deceleration of the trailer is buffered and the trailer stops smoothly.

[0031] The utility model can meet the requirement of buffering large inertia force under the working conditions of trailer starting, braking and driving deceleration, and has the characteristics of reliable strength, simple structure, low cost, convenient installation, small size and the like.

Claims

1. A tractor buffer mechanism, characterized in that: include: Connecting head (1), movable steel sleeve (2), front baffle (3), buffer spring (4), rear baffle (5), bushing (7), baffle (8), nut (9); A front baffle (3) is welded to the front end of the trailer traction rod body, and a rear baffle (5) is welded to the rear inner side of the trailer traction rod body. The front end of the connector (1) is connected to the tractor, and the rear end of the connector (1) passes through the front baffle (3), the buffer spring (4) and the rear baffle (5). After the rear end of the connector (1) passes through the rear baffle (5), it is limited by a baffle (8) and a nut (9); a pair of bushings (7) are symmetrically mounted on the inner sides of the front baffle (3) and the rear baffle (5), and each bushing (7) is mounted with a movable steel sleeve (2), the movable steel sleeve (2) and the bushing (7) are stepped shaft structures, and the interiors of the front baffle (3) and the rear baffle (5) are stepped hole structures.

2. A tractor buffer mechanism according to claim 1, characterized in that: The bushing (7) is symmetrically mounted on the inner sides of the front baffle (3) and the rear baffle (5) by means of screws (6).

3. A tractor buffer mechanism as claimed in claim 1, characterized in that: The connector (1) is composed of a traction ring (10), a connecting rod (11), and a cylindrical pin (12). The front end outer circle of the connecting rod (11) and the inner hole of the traction ring (10) are interference fit. After the connecting rod (11) and the traction ring (10) are assembled, a through hole for installing the cylindrical pin (12) is processed, and the hole and the cylindrical pin (12) are interference fit.

4. A tractor buffer mechanism as claimed in claim 3, characterized in that: A "V"-shaped groove is processed at the front end of the connecting rod (11), the length of the groove is greater than the depth of the inner hole of the traction ring (10), the rear end of the connecting rod (11) is an external thread, a baffle (8) is assembled on the threaded section, and two nuts (9) are arranged outside the baffle (8).

5. A tractor buffer mechanism as claimed in claim 1, characterized in that: The traction ring (10) and the connecting rod (11) are made of high-strength 45# steel.

6. A tractor buffer mechanism as claimed in claim 1, characterized in that: The movable steel sleeve (2) is made of high-strength 40Cr material, and the bushing (7) is made of wear-resistant QSn4-3 tin bronze material.

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