Draw hook buffer

Abstract

The utility model discloses a draw hook buffer which comprises an installation frame and a draw hook, the installation frame comprises two buffer transverse plates and two side plates, the side plates are arranged in a bilateral symmetry mode, the buffer transverse plates are arranged in a front-back symmetry mode, the buffer transverse plates and the side plates form a square frame, and a connecting core plate is installed in the installation frame in a sliding mode. Permanent strong magnets are symmetrically embedded in the connecting core plate, electromagnets are symmetrically embedded in the buffering transverse plate and matched with the connecting core plate, a threaded sleeve block is embedded in the center of the connecting core plate, and the tail end of the traction hook is installed in the threaded sleeve block in a threaded mode. And a return spring is arranged between the buffer transverse plate and the connecting core plate. Through mutual cooperation of the electromagnet and the permanent strong magnet and the principle that magnetic fields of the same stage repel each other, compared with an existing device, the buffering capacity is higher, meanwhile, the initial pre-tightening force, the response speed and the like can be considered, and compared with a traditional spring and the like, the buffering performance is better.

Description

Technical Field

[0001] This utility model relates to a buffer, and more particularly to a traction hook buffer. Background Technology

[0002] As my country's transportation industry develops towards "heavy load, high speed, and safety," the load capacity and operating speed of various vehicles are constantly increasing, leading to greater longitudinal impacts and placing higher demands on vehicle operation safety. Coupler buffers are one of the basic and crucial connecting components of a vehicle. They transmit longitudinal traction forces between vehicles, mitigate various longitudinal impacts generated during operation or shunting, absorb impact energy, protect the vehicle structure, and ensure operational safety. Therefore, continuously improving the performance of coupler buffers is one way to improve vehicle operating quality and efficiency.

[0003] Existing tow hook buffers use springs or ordinary rubber materials, which have insufficient energy absorption capacity (generally less than 50kJ), making it difficult to cope with severe longitudinal impacts in heavy-load or high-speed scenarios, and easily causing damage to the vehicle body structure. Utility Model Content

[0004] The purpose of this invention is to provide a traction hook buffer to solve the existing problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a traction hook buffer, comprising a mounting frame and a traction hook. The mounting frame includes two buffer horizontal plates and two side plates, the side plates being symmetrically arranged left and right, and the buffer horizontal plates being symmetrically arranged front and back. The buffer horizontal plates and side plates form a square frame. A connecting core plate is slidably mounted inside the mounting frame. Permanent strong magnets are symmetrically embedded in the connecting core plate. Electromagnets are symmetrically embedded in the buffer horizontal plates. The electromagnets cooperate with the connecting core plate. A threaded sleeve is embedded in the center of the connecting core plate. The end of the traction hook is threadedly mounted in the threaded sleeve. A return spring is provided between the buffer horizontal plates and the connecting core plate.

[0006] Preferably, contact switches are embedded on the adjacent surfaces of the front and rear buffer plates, and contact protrusions are fixed to the front and rear surfaces of the connecting core plate.

[0007] Preferably, a limiting groove is provided in the side plate, and limiting sliders are fixed to both sides of the connecting core plate, with the limiting sliders slidingly engaging with the limiting groove.

[0008] Preferably, a connecting through hole is provided at the center of the buffer plate, and the inner diameter of the connecting through hole is larger than the diameter of the traction hook.

[0009] Preferably, a support foot is fixed to the outer side of the side plate.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By combining electromagnets with permanent strong magnets and utilizing the principle of mutual repulsion between like magnetic fields, this device has a stronger buffering capacity compared to existing devices. It can also take into account initial preload and response speed, and its buffering performance is superior to that of traditional springs.

[0012] 2. After the traction force reaches its maximum, the connecting core plate will slowly move forward to its maximum stroke, and the contact protrusion will contact the contact switch. At this time, the electromagnet is de-energized and the repulsive force disappears. After the traction force decreases, the return spring can push the connecting core plate to separate the contact protrusion from the contact switch. At this time, the electromagnet will be powered back, and then the repulsive force will be used again to push the connecting core plate to reset. Turning off the electromagnet can save power and reduce the magnetic force consumption of the permanent magnet. Attached Figure Description

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

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is a schematic diagram of the connecting core plate structure of this utility model.

[0016] In the diagram: 1. Mounting frame; 2. Buffer plate; 201. Electromagnet; 202. Contact switch; 203. Connecting through hole; 3. Side plate; 301. Support foot; 302. Limiting groove; 4. Return spring; 5. Connecting core plate; 501. Permanent strong magnet; 502. Threaded sleeve; 503. Contact protrusion; 504. Limiting slider; 6. Traction hook. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3This utility model provides a technical solution: a traction hook buffer, including a mounting frame 1 and a traction hook 6. The mounting frame 1 includes two buffer horizontal plates 2 and two side plates 3. The side plates 3 are symmetrically arranged left and right, and the buffer horizontal plates 2 are symmetrically arranged front and back. The buffer horizontal plates 2 and the side plates 3 form a square frame. A connecting core plate 5 is slidably installed in the mounting frame 1. A permanent strong magnet 501 is symmetrically embedded in the connecting core plate 5. An electromagnet 201 is symmetrically embedded in the buffer horizontal plate 2. The electromagnet 201 cooperates with the connecting core plate 5. A threaded sleeve block 502 is embedded in the center of the connecting core plate 5. The end of the traction hook 6 is threadedly installed in the threaded sleeve block 502. A return spring 4 is provided between the buffer horizontal plate 2 and the connecting core plate 5.

[0019] In this embodiment, by threading the traction hook 6 inside the threaded sleeve 502, the traction hook 6 is connected to the connecting core plate 5. The permanent strong magnet 501 and the electromagnet 201 cooperate with each other, so that the magnetic poles of the electromagnet 201 and the permanent strong magnet 501 are opposite in direction. At this time, the electromagnet 201 and the permanent strong magnet 501 generate a corresponding repulsive force, making it difficult for the connecting core plate 5 to approach the buffer cross plate 2, thereby providing a certain buffering capacity. The repulsive force can be estimated by the magnetic field superposition formula: F≈(Belectromagnet × B permanent magnet × A) / 2μ0, where:

[0020] B. Electromagnetism: The typical value of the magnetic induction intensity of an electromagnet is 0.5–1.2T, depending on the power and coil design.

[0021] B permanent magnet: Neodymium iron boron permanent magnet with a magnetic induction intensity of 0.4–0.7T.

[0022] A: Effective working area, for example, 50×50mm 2 Corresponding to 0.0025m 2

[0023] μ0: Vacuum permeability 4π×10⁻⁷ T cdotpm / A

[0024] It can be roughly calculated that F≈950N. If a high-performance N52 grade neodymium magnet is used, the maximum repulsive force can reach about 2000N, which can fully meet the traction and buffering needs of most vehicles at present. Using magnetic force for buffering can take into account the initial preload and response speed, and its buffering performance is better than that of traditional springs.

[0025] In order to restrict the movement of the connecting core plate 5, the device adopts the following technical solution: a contact switch 202 is embedded on the adjacent surfaces of the front and rear buffer cross plates 2, a contact protrusion 503 is fixedly connected to the front and rear of the connecting core plate 5, a limit groove 302 is opened in the side plate 3, and a limit slider 504 is fixedly connected to both sides of the connecting core plate 5, and the limit slider 504 slides in cooperation with the limit groove 302.

[0026] By sliding the limiting slider 504 and the limiting groove 302 together, the connecting core plate 5 is restricted to moving only back and forth. At the same time, the limited length of the limiting groove 302 can limit the stroke of the connecting core plate 5. When the connecting core plate 5 is subjected to excessive traction force, it will reach its maximum design stroke. The limiting slider 504 will abut against the inner wall of the limiting groove 302, and the contact protrusion 503 will contact the contact switch 202. When the contact switch 202 is pressed, it will send a signal to close the electromagnet 201. The electromagnet 201 will close and the repulsive force will disappear. At this time, it will directly become a rigid connection. The connecting core plate 5 is connected to the side plate 3, and the force is directly transmitted to the connected carriage. During the continuous existence of traction force and normal operation, closing the electromagnet 201 can save power and reduce the magnetic force consumption of the permanent magnet. After the traction force decreases, the return spring 4 can push the connecting core plate 5 to separate the contact protrusion 503 from the contact switch 202. At this time, the electromagnet 201 will be powered again, and then the repulsive force will push the connecting core plate 5 to reset.

[0027] In order to achieve the purpose of the fixing device, the device adopts the following technical solution: a connecting through hole 203 is opened at the center of the front buffer plate 2, the inner diameter of the connecting through hole 203 is larger than the diameter of the traction hook 6, and a support foot 301 is fixedly connected to the outside of the side plate 3.

[0028] The towing hook 6 can pass through the connecting hole 203 and connect to the connecting core plate 5. The support foot 301 can be used to connect to the carriage with bolts, thereby fixing the device to the carriage or the front of the car, so as to achieve the purpose of traction buffering.

[0029] The working principle and usage process of this utility model are as follows: When using the device, it needs to be installed in a suitable position. The device to be pulled is connected by the traction hook 6. The electromagnet 201 is activated to generate a magnetic field. The direction of the magnetic field of the electromagnet 201 is the same as that of the permanent strong magnet 501. The connecting core plate 5 needs to overcome the repulsive force of the magnetic field to move. The magnetic force is used to provide a buffer for the traction. After the traction force reaches its maximum, the connecting core plate 5 will slowly move forward to its maximum stroke. The contact protrusion 503 will contact the contact switch 202. At this time, the electromagnet 201 is de-energized and the repulsive force disappears. After the traction force decreases, the return spring 4 can push the connecting core plate 5 to separate the contact protrusion 503 from the contact switch 202. At this time, the electromagnet 201 will be powered back, and the repulsive force will be used again to push the connecting core plate 5 to reset.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A towing hook buffer, comprising a mounting frame (1) and a towing hook (6), characterized in that: The mounting frame (1) includes two buffer horizontal plates (2) and two side plates (3). The side plates (3) are arranged symmetrically on the left and right, and the buffer horizontal plates (2) are arranged symmetrically on the front and back. The buffer horizontal plates (2) and the side plates (3) form a square frame. A connecting core plate (5) is slidably installed in the mounting frame (1). A permanent strong magnet (501) is symmetrically embedded in the connecting core plate (5). An electromagnet (201) is symmetrically embedded in the buffer horizontal plate (2). The electromagnet (201) cooperates with the connecting core plate (5). A threaded sleeve block (502) is embedded in the center of the connecting core plate (5). The end of the traction hook (6) is threaded in the threaded sleeve block (502). A return spring (4) is provided between the buffer horizontal plate (2) and the connecting core plate (5).

2. A traction hook buffer according to claim 1, characterized in that: Contact switches (202) are embedded on the adjacent surfaces of the front and rear buffer plates (2), and contact protrusions (503) are fixed to the front and rear of the connecting core plate (5).

3. A traction hook buffer according to claim 1, characterized in that: A limiting groove (302) is provided in the side plate (3), and limiting sliders (504) are fixed on both sides of the connecting core plate (5). The limiting sliders (504) slide in cooperation with the limiting groove (302).

4. A traction hook buffer according to claim 1, characterized in that: A connecting through hole (203) is provided at the center of the buffer plate (2) mentioned above, and the inner diameter of the connecting through hole (203) is larger than the diameter of the traction hook (6).

5. A traction hook buffer according to claim 1, characterized in that: The side plate (3) is fixedly connected to a support foot (301) on the outside.

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