A self-locking connection structure for an underground mining vehicle

Abstract

The present invention discloses a self-locking connection structure for underground mine cars, which includes first and second bearing seats, first and second vertical plates, a self-locking component, an excitation component, a locking component, and first and second buffer components. The tops of the first and second bearing seats are respectively provided with the first and second vertical plates. One side of the first and second vertical plates is respectively provided with the self-locking component and the excitation component. The locking component is arranged on the self-locking component, and the first and second buffer components are respectively arranged on the first and second bearing seats. In the present invention, a linkage structure on the self-locking clamping seat is triggered by a locking pin, so that two mine cars are pre-locked. Then, the structural stability of the pre-locking is enhanced through the locking component, and the locking arc block and the self-locking clamping seat are connected as a whole, thereby completing the connection work of the mine cars. The connection is convenient and efficient. The first and second buffer components cooperate with each other to enable the device to absorb forces in multiple directions, with good shock absorption effect, improve the stability of the device, and effectively avoid the deformation of the mine car caused by collision.

Description

Technical Field

[0001] This application relates to the technical field of coal mine transportation equipment, and particularly relates to a self-locking connection structure for underground mine cars. Background Art

[0002] Mine cars are special vehicles for mine track transportation. To adapt to the narrow conditions of underground roadways, their external dimensions are compact. There are freight cars, personnel cars, material cars, etc. Mine cars are narrow-gauge railway handling vehicles for transporting bulk materials such as coal, ore, and waste rock in mines. Generally, they must be towed by locomotives or winches. Mine cars are divided into 5 categories according to different structures and unloading methods: fixed mine cars, tipping mine cars, single-side curved rail side-dumping mine cars, bottom-dumping mine cars, and shuttle mine cars.

[0003] In the mining field, track mine cars are the main equipment for transporting minerals. During the production process, to meet the production needs, generally, mine cars are connected in series through connectors, and the traction equipment is then connected to the mine cars through steel ropes to control the reciprocating movement of the mine cars on the mine track, so as to complete the transportation work of personnel, ore, etc.

[0004] Chinese Invention Patent Application No. 201711167045.8 discloses a mine car buffer connector with a dual buffering function that can prevent rigid collisions of mine cars, which relates to the field of mine car connectors. Specifically, it relates to a mine car buffer connector, which includes a hydraulic cylinder, an oil storage tank, a buffer spring, a spring pressing plate, a locking nut, a pin connection end, and a one-way throttle valve; the rodless cavity of the hydraulic cylinder is directly connected to the oil storage tank, and the rodless cavity of the hydraulic cylinder and the rodless cavity of the hydraulic cylinder are connected to each other through an oil return channel; the one-way throttle valve is arranged in the oil return channel, and the one-way throttle direction is: from the rodless cavity of the hydraulic cylinder to the rodless cavity of the hydraulic cylinder; the buffer spring is sleeved on the piston rod of the hydraulic cylinder. The mine car buffer connector of the present invention has a good anti-collision effect and can effectively avoid the collision deformation of mine cars.

[0005] The above-mentioned equipment uses a hydraulic cylinder and a buffer spring kit to prevent rigid collisions of mine cars, which plays a protective role for mine cars to a certain extent, but there are still the following deficiencies: In the connection of two mine cars, the traditional locking method is still used. It is necessary to manually adjust the position of the lock hole by workers on the premise that two adjacent mine cars are stationary, which is time-consuming, laborious, very cumbersome, and the connection efficiency is low; in terms of the shock absorption of the connection of two mine cars, the above-mentioned equipment is difficult to withstand the lateral shear force when the mine car bumps during travel, which is easy to cause damage to the hydraulic cylinder, resulting in a deterioration of the shock absorption effect. Summary of the Invention

[0006] The object of the present invention is to provide a self-locking connection structure for underground mine cars, which solves the problems of low locking efficiency during the connection of current mine cars and the difficulty of the equipment to withstand the lateral shear force when the mine car bumps during travel, which is easy to cause equipment damage, resulting in a deterioration of the shock absorption effect.

[0007] The technical solution of the present invention is: a self-locking connection structure for an underground mining vehicle, including a first bearing seat, a second bearing seat, a first vertical plate, a second vertical plate, a self-locking component, an excitation component, a locking component, a first buffer component and a second buffer component. A first vertical plate and a second vertical plate are respectively arranged at the top of the first bearing seat and the top of the second bearing seat. A self-locking component is arranged on one side of the first vertical plate, and an excitation component is arranged on one side of the second vertical plate. The self-locking component and the excitation component are opposite in position. The locking component is arranged on the self-locking component. A first buffer component is arranged on one side of the first bearing seat, and a second buffer component is arranged on the side of the second bearing seat opposite to the first bearing seat.

[0008] As a preferred embodiment of the self-locking connection structure for an underground mining vehicle provided by the present invention, the self-locking component includes a first extension rod arranged on one end face of the first vertical plate and a self-locking card seat arranged at the end of the first extension rod. Semi-circular empty grooves are respectively opened on the outer walls of the top and bottom near the self-locking card seat. A rotating shaft is arranged inside one side of the self-locking card seat. A locking arc block and a linkage arc block are rotatably connected to the outer wall of the rotating shaft. The locking arc block and the linkage arc block are arranged at a right angle to each other. The number of both the locking arc block and the linkage arc block is two. A through hole is opened near the end position of the locking arc block. A locking groove and a pin hole vertically penetrating the locking groove are opened on the other side of the self-locking card seat. The locking component is arranged in the pin hole.

[0009] As a preferred embodiment of the self-locking connection structure for an underground mining vehicle provided by the present invention, the locking arc block and the linkage arc block are fixedly connected and arranged at a right angle to each other. The number of the locking grooves is two and they are symmetrically opened. The position of the locking grooves corresponds to that of the locking arc blocks.

[0010] As a preferred embodiment of the self-locking connection structure for an underground mining vehicle provided by the present invention, the locking component includes a pin rod, a limiting piece and a rotating ring. A limiting ring is arranged at the top of the pin rod. Threads are arranged on the outer wall near the bottom of the pin rod. The rotating ring is screwed with the pin rod through the threads. The length of the pin rod is greater than that of the pin hole.

[0011] As a preferred embodiment of the self-locking connection structure for an underground mining vehicle provided by the present invention, the excitation component includes a second extension rod and a locking pin. The second extension rod is arranged on one end face of the second vertical plate. A locking pin is arranged at the end of the second extension rod. The locking pin is integrally cylindrical.

[0012] When connecting two mine cars, the mine car equipped with the self-locking component needs to be in a braking state (or the mine car equipped with the activation component needs to be in a braking state). The staff operates the mine car equipped with the activation component to contact it. During the process of the two mine cars gradually approaching, the locking pin set at the end of the second extension rod will push against the linkage arc block and force the linkage arc block to move towards the position where the self-locking clamp seat is located. At the same time, since the locking arc block and the linkage arc block are fixedly connected and share a rotating shaft, the locking arc block will gradually approach the locking pin. As the two mine cars continue to approach, the locking pin is located within the self-locking clamp seat. At this time, the end of the locking arc block with a through hole is located within the locking groove, and the linkage arc block passes through the arc-shaped empty groove opened on the self-locking clamp seat and is located on the outer wall of the self-locking clamp seat, thus completing the pre-locking procedure for connecting the two mine cars. In the further fixing work, the staff needs to insert the bolt rod into the bolt hole and fix the bolt rod by rotating the rotating ring, thereby connecting the locking arc block and the self-locking clamp seat into a whole and completing the connection work of the mine car.

[0013] When it is necessary to separate the two connected mine cars, it is necessary to first cancel the locking of the locking component, and then push the linkage arc block located on the outer wall of the self-locking clamp seat. The linkage arc block will push against the locking pin and slowly move away from the self-locking clamp seat. After a certain distance, the linkage arc block is pushed into the arc-shaped empty groove and becomes inoperable. At this time, just pull the locking arc block to move the locking pin away from the self-locking clamp seat.

[0014] The present invention changes the connection structure. By using the locking pin to trigger the linkage structure on the self-locking clamp seat, the two mine cars complete the pre-locking procedure. Then, through the locking component, the structural stability of the pre-locking is enhanced, and the locking arc block and the self-locking clamp seat are connected into a whole to complete the connection work of the mine car. By using this method for connection, the staff does not need to manually adjust the position of the lock hole, the connection is convenient, and the efficiency is high.

[0015] As a preferred embodiment of the self-locking connection structure for underground mine cars provided by the present invention, the first buffer component includes a first buffer rod, a pulley seat, and a buffer pulley. The number of the first buffer rods is two and they are symmetrically arranged on one side of the first bearing seat. The end of the first buffer rod is provided with a pulley seat, and a buffer pulley is rotatably connected to the pulley seat. The buffer pulley contacts the second buffer component.

[0016] As a preferred embodiment of the self-locking connection structure for underground mining vehicles provided by the present invention, the second buffer assembly includes a movable block, a spring, a second buffer rod, and a buffer arc surface block. Two symmetric empty slots are opened inside the second bearing seat. A spring and a movable block are arranged in the empty slot. The movable block is located at the center of the empty slot. The number of springs is several. One end of the spring is fixedly connected to the outer wall of the movable block, and the other end is fixedly connected to the wall of the empty slot. A second buffer rod is arranged on one outer wall of the movable block. A buffer arc surface block is arranged at the end of the second buffer rod. The buffer arc surface block contacts the first buffer assembly.

[0017] After the two mining vehicles are connected through the self-locking assembly and the excitation assembly, the buffer pulley in the first buffer assembly will contact the buffer arc surface block in the second buffer assembly. The force generated by the collision between the mining vehicles will be transmitted by the second buffer rod to the movable block in the empty slot and absorbed by several spring sets fixed to the outer wall of the movable block. And due to the special position setting of the springs on the outer wall of the movable block, good shock absorption effect can also be provided when the mining vehicle is subjected to a slight lateral force.

[0018] Among them, the cooperation of the pulley and the buffer arc surface block enables the device to absorb forces in multiple directions, has a good shock absorption effect, improves the stability of the device, and effectively avoids the deformation of the mining vehicle caused by collision.

[0019] As a preferred embodiment of the self-locking connection structure for underground mining vehicles provided by the present invention, the second buffer assembly further includes a rubber pad, and the rubber pad is arranged on the outer wall of the buffer arc surface block.

[0020] The rubber pad plays a buffering role, can avoid the direct contact between the buffer pulley and the buffer arc surface block, and increases the service life of the buffer pulley.

[0021] As a preferred embodiment of the self-locking connection structure for underground mining vehicles provided by the present invention, two triangular fixing frames are arranged on the opposite sides of the first vertical plate and the second vertical plate. Connecting plate seats are arranged on the opposite sides of the first bearing seat and the second bearing seat. A number of screw holes are arranged in the connecting plate seats in an array, and bolts are screwed into the screw holes.

[0022] The triangular fixing frames improve the structural stability of the device. The connecting plate seats, screw holes, and bolts facilitate the installation of the device on the mining vehicle.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The present invention changes the connection structure. The linkage structure on the self-locking clamping seat is triggered by a locking pin, enabling two mine cars to complete the pre-locking procedure. Then, the locking assembly is used to enhance the structural stability of the pre-locking, making the locking arc block and the self-locking clamping seat an integrated whole to complete the connection of the mine cars. When connecting in this way, the staff does not need to manually adjust the position of the lock hole, which is convenient and efficient. The first buffer assembly and the second buffer assembly cooperate with each other to enable the device to absorb forces in multiple directions, with good shock absorption effect, improving the stability of the device and effectively avoiding the deformation of the mine car caused by collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. The drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 Structural schematic diagram of the first three-dimensional perspective of the present invention;

[0027] Figure 2 Structural schematic diagram of the second three-dimensional perspective of the present invention;

[0028] Figure 3 Structural schematic diagram of the position of A in the drawing of the present invention;

[0029] Figure 4 For Figure 3 Enlarged structural schematic diagram of the position where A is located in

[0030] Figure 5 Structural schematic diagram of the position of B in the drawing of the present invention;

[0031] Figure 6 For Figure 5 Enlarged structural schematic diagram of the position where B is located in

[0032] Figure 7 Structural schematic diagram of the excitation assembly of the present invention;

[0033] Figure 8 Structural schematic diagram of the locking assembly of the present invention;

[0034] Figure 9 Structural schematic diagram of the position of C in the drawing of the present invention;

[0035] Figure 10 For Figure 9 Enlarged structural schematic diagram of the position where C is located in

[0036] Wherein: 1. First bearing seat; 2. Second bearing seat; 3. First vertical plate; 4. Second vertical plate; 5. Self-locking assembly; 6. Activation assembly; 7. Locking assembly; 8. First buffer assembly; 9. Second buffer assembly; 10. Triangular fixing bracket; 11. Connecting plate seat; 501. First extension rod; 502. Self-locking clamping seat; 503. Rotating shaft; 504. Locking arc block; 505. Linkage arc block; 506. Locking groove; 601. Second extension rod; 602. Locking pin; 701. Plug rod; 702. Limiting piece; 703. Rotating ring; 801. First buffer rod; 802. Pulley seat; 803. Buffer pulley; 901. Movable block; 902. Spring; 903. Second buffer rod; 904. Buffer arc surface block; 905. Rubber pad. Detailed implementation manners

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase does not necessarily refer to the same embodiment at every occurrence in the specification, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0038] As described in the background art, currently, there are problems in the equipment such as low locking efficiency when connecting mine cars and the equipment is difficult to withstand the lateral shear force during the bumpy movement of the mine cars, which easily causes damage to the equipment and thus leads to a poor damping effect.

[0039] To solve the above technical problems, the inventor of this application proposes a self-locking connection structure for underground mine cars.

[0040] Specifically, as Figure 1-10 shown, it includes a first bearing seat 1, a second bearing seat 2, a first vertical plate 3, a second vertical plate 4, a self-locking assembly 5, an activation assembly 6, a locking assembly 7, a first buffer assembly 8 and a second buffer assembly 9. First vertical plates 3 are respectively provided on the tops of the first bearing seat 1 and the second bearing seat 2, a self-locking assembly 5 is provided on one side of the first vertical plate 3, an activation assembly 6 is provided on one side of the second vertical plate 4, the self-locking assembly 5 and the activation assembly 6 are opposite in position, a locking assembly 7 is provided on the self-locking assembly 5, a first buffer assembly 8 is provided on one side of the first bearing seat 1, and a second buffer assembly 9 is provided on the surface of the second bearing seat 2 opposite to the first bearing seat 1.

[0041] The present invention changes the connection structure. The linkage structure on the self-locking card seat 502 is triggered by the locking pin 602 to enable two mine cars to complete the pre-locking procedure. Then, the locking assembly 7 is used to strengthen the structural stability of the pre-locking, so that the locking arc block 504 and the self-locking card seat 502 are integrated into a whole to complete the connection of the mine cars. When connecting in this way, the staff does not need to manually adjust the position of the lock hole, the connection is convenient and the efficiency is high. The first buffer assembly 8 and the second buffer assembly 9 cooperate with each other to enable the device to absorb forces in multiple directions, with good shock absorption effect, improve the stability of the device, and effectively avoid the deformation of the mine car caused by collision.

[0042] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0043] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0044] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0045] It should be noted that like reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] As Figure 1-10 shown, a self-locking connection structure for an underground mine car includes a first bearing seat 1, a second bearing seat 2, a first vertical plate 3, a second vertical plate 4, a self-locking assembly 5, an excitation assembly 6, a locking assembly 7, a first buffer assembly 8 and a second buffer assembly 9. First vertical plates 3 and second vertical plates 4 are respectively arranged at the tops of the first bearing seat 1 and the second bearing seat 2. A self-locking assembly 5 is arranged on one side of the first vertical plate 3, and an excitation assembly 6 is arranged on one side of the second vertical plate 4. The self-locking assembly 5 and the excitation assembly 6 are opposite in position. The locking assembly 7 is arranged on the self-locking assembly 5. A first buffer assembly 8 is arranged on one side of the first bearing seat 1, and a second buffer assembly 9 is arranged on the surface of the second bearing seat 2 opposite to the first bearing seat 1.

[0047] The self-locking assembly 5 includes a first extension rod 501 provided on one end face of the first vertical plate 3 and a self-locking card seat 502 provided at the end of the first extension rod 501. Semi-circular empty grooves are provided on both the top outer wall and the bottom outer wall near the self-locking card seat 502. A rotating shaft 503 is provided inside one side of the self-locking card seat 502. A locking arc block 504 and a linkage arc block 505 are rotatably connected to the outer wall of the rotating shaft 503. The locking arc block 504 and the linkage arc block 505 are arranged at a right angle to each other. The number of both the locking arc block 504 and the linkage arc block 505 is two. A through hole is provided near the end position of the locking arc block 504. A locking groove 506 and a pin hole vertically penetrating the locking groove 506 are provided on the other side of the self-locking card seat 502. A locking component 7 is provided in the pin hole. The locking arc block 504 and the linkage arc block 505 are fixedly connected and are at a right angle to each other. The number of the locking grooves 506 is two and they are symmetrically provided. The position of the locking groove 506 corresponds to that of the locking arc block 504.

[0048] The locking component 7 includes a pin rod 701, a limiting piece 702 and a rotating ring 703. A limiting ring is provided at the top of the pin rod 701. Threads are provided on the bottom outer wall near the pin rod 701. The rotating ring 703 is screwed with the pin rod 701 through the threads. The length of the pin rod 701 is greater than that of the pin hole. The excitation component 6 includes a second extension rod 601 and a locking pin 602. The second extension rod 601 is provided on one end face of the second vertical plate 4. A locking pin 602 is provided at the end of the second extension rod 601. The locking pin 602 is integrally cylindrical.

[0049] When connecting two mine cars, it is necessary to make the mine car equipped with the self-locking assembly 5 in a braking state (or the mine car equipped with the excitation component 6 in a braking state). The staff operates the mine car equipped with the excitation component 6 to contact it. During the process of the two mine cars approaching gradually, the locking pin 602 provided at the end of the second extension rod 601 will push the linkage arc block 505 and force the linkage arc block 505 to move towards the position where the self-locking card seat 502 is located. At the same time, since the locking arc block 504 and the linkage arc block 505 are fixedly connected and share a rotating shaft 503, the locking arc block 504 will gradually approach the locking pin 602. As the two mine cars get closer and closer, the locking pin 602 is located inside the self-locking card seat 502. At this time, the end with the through hole on the locking arc block 504 is located inside the locking groove 506, and the linkage arc block 505 passes through the arc-shaped empty groove provided on the self-locking card seat 502 and is located outside the self-locking card seat 502, thus completing the pre-locking procedure for connecting the two mine cars. In the further fixing work, the staff needs to insert the pin rod 701 into the pin hole and fix the pin rod 701 by rotating the rotating ring 703, thereby making the locking arc block 504 and the self-locking card seat 502 into an integral whole and completing the connection work of the mine cars.

[0050] When it is necessary to separate two connected mine cars, the locking of the locking component 7 needs to be cancelled first, and then the linkage arc block 505 located on the outer wall of the self-locking clamping seat 502 is pushed. The linkage arc block 505 will slowly move away from the self-locking clamping seat 502 against the locking pin 602. After a certain distance, the linkage arc block 505 is pushed into the arc-shaped empty groove and becomes inoperable. At this time, only by pulling the locking arc block 504 can the locking pin 602 be moved away from the self-locking clamping seat 502.

[0051] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 、 Figure 9 、 Figure 10 As shown, the first buffer component 8 includes a first buffer rod 801, a pulley seat 802 and a buffer pulley 803. The number of the first buffer rods 801 is two and they are symmetrically arranged on one side of the first bearing seat 1. A pulley seat 802 is arranged at the end of the first buffer rod 801. A buffer pulley 803 is rotatably connected to the pulley seat 802, and the buffer pulley 803 contacts the second buffer component 9.

[0052] The second buffer component 9 includes a movable block 901, a spring 902, a second buffer rod 903 and a buffer arc surface block 904. Two symmetrical empty grooves are opened inside the second bearing seat 2. A spring 902 and a movable block 901 are arranged in the empty groove. The movable block 901 is located at the central position of the empty groove. The number of the springs 902 is several. One end of the spring 902 is fixedly connected to the outer wall of the movable block 901, and the other end is fixedly connected to the empty groove wall. A second buffer rod 903 is arranged on one of the outer walls of the movable block 901. A buffer arc surface block 904 is arranged at the end of the second buffer rod 903, and the buffer arc surface block 904 contacts the first buffer component 8. The second buffer component 9 further includes a rubber pad 905, and the rubber pad 905 is arranged on the outer wall of the buffer arc surface block 904.

[0053] After two mine cars are connected through the self-locking component 5 and the excitation component 6, the buffer pulley 803 in the first buffer component 8 will contact the buffer arc surface block 904 in the second buffer component 9. The force generated by the collision between the mine cars will be transmitted from the second buffer rod 903 to the movable block 901 in the empty groove, and absorbed by several spring 902 sets fixedly connected to the outer wall of the movable block 901. And due to the special position setting of the springs 902 on the outer wall of the movable block 901, a good damping effect can also be provided when the mine car is subjected to a slight lateral force.

[0054] Among them, the rubber pad 905 plays a buffering role, which can avoid the direct contact between the buffer pulley 803 and the buffer arc surface block 904, and increases the service life of the buffer pulley 803; the cooperation of the pulley and the buffer arc surface block 904 enables the device to absorb forces in multiple directions, with good damping effect, improves the stability of the device, and effectively avoids the deformation of the mine car caused by collision.

[0055] As Figure 1 、 Figure 2 shown, on the opposite sides of the first vertical plate 3 and the second vertical plate 4, there are provided two triangular fixing brackets 10. On the opposite sides of the first bearing seat 1 and the second bearing seat 2, there is provided a connecting plate seat 11. A plurality of screw holes are arranged in the connecting plate seat 11, and bolts are screwed into the screw holes.

[0056] The triangular fixing brackets 10 improve the structural stability of the device, and the connecting plate seat 11, the screw holes and the bolts facilitate the installation of the device onto the mine car.

[0057] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An underground mine vehicle self-locking connection structure, comprising a first bearing seat (1), a second bearing seat (2), a first vertical plate (3), a second vertical plate (4), a self-locking assembly (5), an excitation assembly (6), a locking assembly (7), a first buffer assembly (8) and a second buffer assembly (9), characterized in that: A first vertical plate (3) and a second vertical plate (4) are respectively arranged at the tops of the first carrier seat (1) and the second carrier seat (2). A self-locking component (5) is arranged on one side of the first vertical plate (3), and an excitation component (6) is arranged on one side of the second vertical plate (4). The self-locking component (5) and the excitation component (6) are opposite in position. A locking component (7) is arranged on the self-locking component (5). A first buffer component (8) is arranged on one side of the first carrier seat (1), and a second buffer component (9) is arranged on the surface of the second carrier seat (2) opposite to the first carrier seat (1); The self-locking component (5) includes a first extension rod (501) arranged on one end face of the first vertical plate (3) and a self-locking clamping seat (502) arranged at the end of the first extension rod (501). Semi-circular empty grooves are respectively formed on the outer walls of the top and bottom near the self-locking clamping seat (502). A rotating shaft (503) is arranged inside one side of the self-locking clamping seat (502). A locking arc block (504) and a linkage arc block (505) are rotatably connected to the outer wall of the rotating shaft (503). The locking arc block (504) and the linkage arc block (505) are arranged at a right angle to each other. The number of both the locking arc block (504) and the linkage arc block (505) is two. A through hole is formed near the end of the locking arc block (504). A locking groove (506) and a pin hole vertically penetrating the locking groove (506) are formed on the other side of the self-locking clamping seat (502). The locking component (7) is arranged in the pin hole; The locking arc block (504) and the linkage arc block (505) are fixedly connected and are at a right angle to each other. The number of the locking grooves (506) is two and they are symmetrically arranged. The position of the locking groove (506) corresponds to that of the locking arc block (504); The excitation component (6) includes a second extension rod (601) and a locking pin (602). The second extension rod (601) is arranged on one end face of the second vertical plate (4), and the locking pin (602) is arranged at the end of the second extension rod (601). The locking pin (602) is integrally cylindrical.

2. The self-locking connection structure for an underground mining vehicle according to claim 1, characterized in that, The locking component (7) includes a pin rod (701), a limiting piece (702) and a rotating ring (703). A limiting ring is arranged at the top of the pin rod (701). Threads are arranged on the outer wall near the bottom of the pin rod (701). The rotating ring (703) is screwed with the pin rod (701) through the threads. The length of the pin rod (701) is greater than that of the pin hole.

3. The self-locking connection structure for an underground mining vehicle according to claim 1, characterized in that, The first buffer component (8) includes first buffer rods (801), pulley seats (802) and buffer pulleys (803). The number of the first buffer rods (801) is two and they are symmetrically arranged on one side of the first carrier seat (1). The pulley seats (802) are arranged at the ends of the first buffer rods (801). The buffer pulleys (803) are rotatably connected to the pulley seats (802). The buffer pulleys (803) are in contact with the second buffer component (9).

4. The self-locking connection structure for an underground mining vehicle according to claim 1, wherein, The second buffer assembly (9) includes a movable block (901), a spring (902), a second buffer rod (903) and a buffer arc surface block (904). Two symmetrical empty slots are formed inside the second bearing seat (2). A spring (902) and a movable block (901) are arranged in the empty slot. The movable block (901) is located at the center of the empty slot. The number of the springs (902) is several. One end of the spring (902) is fixedly connected to the outer wall of the movable block (901), and the other end is fixedly connected to the wall of the empty slot. A second buffer rod (903) is arranged on one outer wall of the movable block (901). A buffer arc surface block (904) is arranged at the end of the second buffer rod (903). The buffer arc surface block (904) contacts the first buffer assembly (8).

5. The self-locking connection structure for an underground mining vehicle according to claim 4, wherein The second buffer assembly (9) further includes a rubber pad (905). The rubber pad (905) is arranged on the outer wall of the buffer arc surface block (904).

6. The self-locking connection structure for an underground mining vehicle according to claim 1, wherein, Two triangular fixing frames (10) are arranged on the opposite sides of the first vertical plate (3) and the second vertical plate (4). A connecting plate seat (11) is arranged on the opposite sides of the first bearing seat (1) and the second bearing seat (2). A number of screw holes are arranged in the connecting plate seat (11) in an array, and bolts are screwed in the screw holes.

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