Locking mechanism for tractor

Abstract

The utility model discloses a locking mechanism for a tractor, which comprises a locking piece and a connecting hook, the connecting hook is connected with a material vehicle to be dragged, the rear end of the locking piece is connected with the tractor through a connecting block, the front end of the locking piece is provided with a mounting groove for accommodating the connecting hook, and the connecting hook is arranged in the mounting groove. A locking assembly acting on the connecting hook is arranged in the locking piece, the locking assembly is composed of a guide rod, a driving rod, a limiting rod and a limiting plate, the guide rod is located in the locking piece, and one end of the guide rod penetrates through the side wall of the locking piece in a sliding mode and extends to the outside of the locking piece. The locking hole can be automatically closed only by inserting the connecting hook of the towed object into the mounting groove, so that connection between the tractor and the towed object is quickly completed, the connection mode is firm and reliable, and the locking hole can be opened by pulling the handle outwards, so that disassembly work between the tractor and the towed object is quickly completed.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a locking mechanism for tractors. Background Art

[0002] A tractor is a large truck or semi-trailer that is towed by tools between the front and the carriage. That is, the front of the vehicle can be separated from the original carriage to tow other carriages, and the carriage can also be separated from the original front and towed by other fronts. The front of the vehicle with driving ability is called a tractor, and the vehicle without traction driving ability at the back is called a trailer. The trailer is towed by the tractor.

[0003] When using a tractor, it is necessary to connect the tractor and the trailer through a locking mechanism, but the existing locking method cannot achieve automatic locking and requires manual locking by staff, which is time-consuming. Therefore, a locking mechanism for a tractor is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a locking mechanism for a tractor to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a locking mechanism for a tractor, comprising a locking member and a connecting hook, wherein the connecting hook is connected to a material vehicle to be towed, the rear end of the locking member is connected to the tractor through a connecting block, the front end of the locking member is provided with a mounting groove for accommodating the connecting hook, a locking assembly acting on the connecting hook is arranged in the locking member, the locking assembly is composed of a guide rod, a driving rod, a limiting rod and a limiting plate, the guide rod is located inside the locking member, one end of the guide rod slides through the side wall of the locking member and extends to the outside of the locking member, the other end of the guide rod is fixedly connected with the driving rod and the limiting rod, a No. 1 spring is fixedly connected between the end of the driving rod and the inner wall of the locking member, the No. 1 spring and the guide rod are parallel to each other, a limiting plate is also arranged inside the locking member, the limiting plate is rotatably connected to the inside of the locking member through a rotating shaft, an arc groove is arranged at one end of the limiting plate close to the limiting rod, and a No. 2 spring is fixedly connected between the other end of the limiting plate and the inner wall of the locking member.

[0006] As a further preferred embodiment of the present technical solution, the driving rod and the limiting rod are distributed in a V-shaped structure.

[0007] As a further preferred embodiment of the present technical solution, a locking hole is formed between the limiting plate and the limiting rod.

[0008] As a further preferred embodiment of the present technical solution, the protruding end of the guide rod is fixedly connected to a handle, and the outer surface of the handle is frosted.

[0009] As a further preferred embodiment of the present technical solution, a baffle is provided on the outer surface of the limit plate, a side of the baffle close to the limit plate is arranged as an arc surface, and an outer surface of the limit plate is provided with an arc surface which is slidably fitted with the baffle.

[0010] As a further preferred embodiment of the present technical solution, the outer surface of the limit plate is provided with a protrusion integrally formed therewith.

[0011] As a further preferred embodiment of the present technical solution, a guide block is fixedly connected to the side wall of the guide rod, and a guide groove which is slidably engaged with the guide block is formed on the side wall of the locking member.

[0012] The utility model provides a locking mechanism for a tractor, which has the following beneficial effects:

[0013] The utility model has a unique structural setting. Only by inserting the connecting hook of the towing object into the installation groove, the locking hole can be automatically closed, so that the connection between the towing vehicle and the towing object can be quickly completed. The connection method is firm and reliable without looseness. The locking hole can be opened by pulling the handle outwards, so that the disassembly work between the towing vehicle and the towing object can be quickly completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 3 It is a front view of the internal structure of the utility model;

[0017] Figure 4 This is a diagram showing the opening and closing effects of the locking hole in the utility model;

[0018] In the figure: 1. Locking piece; 2. Connecting block; 3. Connecting hook; 4. Mounting slot; 5. Guide block; 6. Guide slot; 7. Handle; 8. Guide rod; 9. Driving rod; 10. Limit rod; 11. No. 1 spring; 12. Limit plate; 13. Rotating shaft; 14. No. 2 spring; 15. Baffle; 16. Bump; 17. Locking hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figures 1 to 4As shown, in this embodiment, a locking mechanism for a tractor includes a locking member 1 and a connecting hook 3, the connecting hook 3 is connected to the material vehicle to be towed, the rear end of the locking member 1 is connected to the tractor through a connecting block 2, the front end of the locking member 1 is provided with a mounting groove 4 for accommodating the connecting hook 3, a locking assembly acting on the connecting hook 3 is arranged in the locking member 1, and the locking assembly is composed of a guide rod 8, a driving rod 9, a limit rod 10 and a limit plate 12, the guide rod 8 is located inside the locking member 1, one end of the guide rod 8 slides through the side wall of the locking member 1 and extends to the outside of the locking member 1, and the other end of the guide rod 8 is fixed A driving rod 9 and a limiting rod 10 are fixedly connected, and the driving rod 9 and the limiting rod 10 are distributed in a V-shaped structure. A No. 1 spring 11 is fixedly connected between the end of the driving rod 9 and the inner wall of the locking member 1. The No. 1 spring 11 is parallel to the guide rod 8. A limiting plate 12 is also arranged inside the locking member 1. The limiting plate 12 is rotatably connected to the inside of the locking member 1 through a rotating shaft 13. An arc-shaped groove is provided at one end of the limiting plate 12 close to the limiting rod 10, and a locking hole 17 is formed between the limiting plate 12 and the limiting rod 10. A No. 2 spring 14 is fixedly connected between the other end of the limiting plate 12 and the inner wall of the locking member 1.

[0021] The extended end of the guide rod 8 is fixedly connected with a handle 7, and the outer surface of the handle 7 is frosted.

[0022] The provided handle 7 can facilitate the staff to hold the handle 7 to pull the guide rod 8 , and the frosted outer surface of the handle 7 can provide friction between the staff's hand and the handle 7 .

[0023] The outer surface of the limiting plate 12 is provided with a baffle 15 , and the side of the baffle 15 close to the limiting plate 12 is set as an arc surface. The outer surface of the limiting plate 12 is provided with an arc surface that is slidably fitted with the baffle 15 .

[0024] The baffle plate 15 can make the limiting plate 12 rotate more smoothly.

[0025] The outer surface of the limiting plate 12 is provided with a protrusion 16 integrally formed therewith.

[0026] The rotation of the limit plate 12 can be limited by the provided protrusion 16. When the limit plate 12 rotates to a certain extent, the protrusion 16 will contact the end of the baffle 15, thereby preventing the limit plate 12 from rotating (refer to Figure 4 ).

[0027] The guide block 5 is fixedly connected to the side wall of the guide rod 8 , and the side wall of the locking member 1 is provided with a guide groove 6 which is slidably engaged with the guide block 5 .

[0028] The guide block 5 and the guide groove 6 can make the guide rod 8 move more smoothly.

[0029] The utility model provides a locking mechanism for a tractor, and the specific working principle is as follows:

[0030] It should be noted that the No. 1 spring 11 and the No. 2 spring 14 are always in a stretched state.

[0031] When using, refer to Figure 3 , the staff holds the handle 7 to pull the guide rod 8 outward, which will further stretch the No. 1 spring 11. When the limit rod 10 on the guide rod 8 is separated from the limit plate 12, the limit plate 12 loses the obstruction of the limit rod 10 and rotates counterclockwise under the action of the No. 2 spring 14 restoring the deformation. When the protrusion 16 on the limit plate 12 contacts the baffle 15, it will stop. At this time, the end of the limit plate 12 will tilt up, and the handle 7 is released. Under the action of the No. 1 spring 11 restoring the deformation, the limit rod 10 will move toward the direction of the limit plate 12 until the end of the limit rod 10 abuts against the tilted end of the limit plate 12 (reference Figure 4 ), at this time, the locking hole 17 formed between the limiting plate 12 and the limiting rod 10 is in an open state.

[0032] Then the staff can insert the connecting hook 3 to be towed into the installation groove 4, the connecting hook 3 will press the limit plate 12 to make it rotate clockwise, the end of the limit plate 12 will separate from the limit rod 10, the limit rod 10 loses the obstruction of the limit plate 12, and the limit rod 10 recovers the deformation force of the No. 1 spring 11, and the limit rod 10 will continue to move in the direction of the limit plate 12 until the limit rod 10 blocks the installation groove 4. At the same time, the inner wall of the limit rod 10 will clamp the limit plate 12 to prevent the limit plate 12 from moving counterclockwise. At this time, the locking hole 17 formed between the limit plate 12 and the limit rod 10 is in a closed state, and the connecting hook 3 is locked in the locking hole 17, thereby quickly completing the connection between the tractor and the towed object. When disassembling, you only need to pull the guide rod 8 outward.

[0033] When the connecting hook 3 is locked in the locking hole 17, the connecting hook 3 can only contact the limiting plate 12. When the connecting hook 3 is pulled, the direction of the force exerted by the limiting plate 12 on the limiting rod 10 is perpendicular to the No. 1 spring 11. That is to say, the force caused by pulling the connecting hook 3 will not cause the No. 1 spring 11 to deform, and there is no need to worry about the loosening of the sealing state of the locking hole 17.

[0034] It should also be noted that the pulling force of the No. 1 spring 11 is much greater than the pulling force of the No. 2 spring 14. The pulling force of the No. 2 spring 14 only needs to satisfy the rotation of the limit plate 12, and the pulling force of the No. 1 spring 11 needs to ensure that the guide rod 8 will not loosen without interference from external forces.

[0035] 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 locking mechanism for a tractor, comprising a locking member (1) and a connecting hook (3), characterized in that: The connecting hook (3) is connected to the material vehicle to be towed, the rear end of the locking member (1) is connected to the tractor through the connecting block (2), the front end of the locking member (1) is provided with a mounting groove (4) for receiving the connecting hook (3), the locking member (1) is provided with a locking assembly acting on the connecting hook (3), the locking assembly is composed of a guide rod (8), a driving rod (9), a limit rod (10) and a limit plate (12), the guide rod (8) is located inside the locking member (1), one end of the guide rod (8) slides through the side wall of the locking member (1) and extends to the outside of the locking member (1), the guide rod ( The other end of the guide rod (8) is fixedly connected to a driving rod (9) and a limiting rod (10), a first spring (11) is fixedly connected between the end of the driving rod (9) and the inner wall of the locking member (1), the first spring (11) and the guide rod (8) are parallel to each other, a limiting plate (12) is also arranged inside the locking member (1), the limiting plate (12) is rotatably connected to the inside of the locking member (1) through a rotating shaft (13), an arc-shaped groove is provided at one end of the limiting plate (12) close to the limiting rod (10), and a second spring (14) is fixedly connected between the other end of the limiting plate (12) and the inner wall of the locking member (1).

2. A locking mechanism for a tractor according to claim 1, characterized in that: The driving rod (9) and the limiting rod (10) are distributed in a V-shaped structure.

3. A locking mechanism for a tractor according to claim 1, characterized in that: A locking hole (17) is formed between the limiting plate (12) and the limiting rod (10).

4. A locking mechanism for a tractor according to claim 1, characterized in that: The extended end of the guide rod (8) is fixedly connected to a handle (7), and the outer surface of the handle (7) is frosted.

5. The locking mechanism for a tractor according to claim 1, characterized in that: The outer surface of the limiting plate (12) is provided with a baffle (15), the side of the baffle (15) close to the limiting plate (12) is arranged as an arc surface, and the outer surface of the limiting plate (12) is provided with an arc surface which is slidably fitted with the baffle (15).

6. A locking mechanism for a tractor according to claim 1, characterized in that: The outer surface of the limiting plate (12) is provided with a protrusion (16) integrally formed therewith.

7. A locking mechanism for a tractor according to claim 1, characterized in that: A guide block (5) is fixedly connected to the side wall of the guide rod (8), and a guide groove (6) is provided on the side wall of the locking member (1) and is slidably engaged with the guide block (5).

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