A mine car connection device and method for removing hooks from the end of a mine car

Abstract

The present invention discloses a mine car connection device and method for unhooking a mine car end, belonging to the technical field of mine car unhooking. The mine car connection device includes a single-action locking device simulating a crab claw structure, the single-action locking device including a connecting hook located on the left side of a slot that can be opened and closed by a pin shaft, and a guide rail located on the right side of the slot that is fixed; when the front and rear ends of two mine cars are connected, the end of the connecting hook contacts the track surface on the guide rail and slides along the track surface and turns to the middle of the connecting seat and finally locks, and a limit pin is used to prevent the connecting hook from rotating, thereby realizing automatic hooking and stringing between the two mine cars, avoiding workers from being squeezed or injured in the hands and feet due to improper operation, improper cooperation, etc. when manually hooking; and the mine car connection device has a consistent structure at the front and rear ends of the mine car, which improves its applicability, and the connection device has a simple structure and is easy to operate.

Description

Technical Field

[0001] The present application relates to the technical field of mine car hook removal, and in particular to a mine car connection device and method for hook removal at the end of a mine car. Background Art

[0002] For a long time, mine car strings have been manually picking and hooking. The picking and hooking links are the weak links in the safety management of mine auxiliary transportation. Due to improper operation and improper coordination, the pickers and hookers are often squeezed or injured in their hands and feet. In addition, the existing mine car picking and hooking connection device has a relatively complex structure, which is inconvenient for workers to operate. In addition, the connection structures of the front and rear ends of the existing mine cars are inconsistent. When the mine cars are connected, the connection structures of the front and rear ends must be matched, which reduces its applicability.

[0003] The prior art with publication number CN212098861U discloses a mine car connection device, comprising a first buttress, a second buttress, and a kingpin. The kingpin is vertically inserted into the first and second buttresses stacked on each other, and an anti-fall block is provided on the upper end of the kingpin. The mine car connection device described in this utility model utilizes an anti-fall block to lock the kingpin in place to prevent it from falling out of the bottom of the buttress, and utilizes a locking member to press the kingpin downward to prevent it from running away from the buttress. The structure is simple, but unhooking requires manual operation, and manual hooking is too complicated.

[0004] Therefore, it is urgent to design a mine car connection device to realize automatic car stringing and manual safe unhooking operations, improve the management level of car stringing and unhooking operations, and promote the improvement of the overall level of mine safety management. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a mine car connection device and method for unhooking the end of the mine car, which has a simple structure and is easy to operate. It can improve the management level of the car stringing and unhooking operations and promote the improvement of the overall level of mine safety management.

[0006] To achieve the above technical objectives, the present invention provides a mine car connecting device for removing a hook from the end of a mine car. The mine car connecting device is fixedly provided at both the front and rear ends of the mine car body. When in use, the two mine car connecting devices are inserted into and locked relative to each other.

[0007] The invention relates to a method for fixing the locking mechanism of the connecting hook to the said mine car body, wherein the locking mechanism comprises a locking mechanism for fixing the locking mechanism to the said mine car body and a locking mechanism for fixing the locking mechanism to the said mine car body. The locking mechanism comprises a connecting seat body with a slot pointing to another mine car connecting device on the connecting seat body, a single-action locking device simulating a crab claw structure is provided in the slot, the single-action locking device comprises a connecting hook located on the left side of the slot and capable of being opened and closed by a pin shaft, and a guide rail located on the right side of the slot and fixed. A semicircular protrusion is provided at the end of the connecting hook, and a hook-shaped lock pointing in the direction of the guide rail is provided laterally at the end of the connecting hook. The tail end of the connecting hook is hinged in the connecting seat body through a pin shaft, and the guide rail is a right-angled triangle structure, and the hypotenuse of the right-angled triangle structure is arranged corresponding to the guide rail. The end of the connecting hook is connected to a spring to make it open to the left, and a contact block is provided at the tail end of the connecting hook which can be stuck on the bottom side of the right-angled triangle of the guide rail to limit the opening angle of the connecting hook to the left. The contact portion of the guide rail is provided with a limiting recess, which is located in an opening formed vertically in the middle of the guide rail, and the end of the guide rail close to the contact block is adapted to the limiting recess and can limit the maximum rotational displacement of the connecting hook, so that the connecting hook can only be opened and closed within the designed limited space; the hypotenuse of the triangular structure of the guide rail matches the circular protrusion of the semicircular protrusion on the connecting hook of the other mine car connecting device, which can guide the connecting hook to move along the hypotenuse of the right triangle and gradually pull the spring. The connecting hooks of the two mine car connecting devices both move along the hypotenuse of the right triangle of the other mine car connecting device, and finally the two connecting hooks are squeezed together under the pressure of the triangular structure of the other guide rail, so that the hook-shaped locks of both parties are buckled with each other to complete the connection;

[0008] An arc-shaped opening is provided on the tail end of the connecting hook, and a limit pin is vertically provided on the connecting seat body. When the connecting hook is in an open state, the bottom of the limit pin abuts against the upper end surface of the connecting hook. When the connecting hooks of the two mine car connecting devices are buckled in a closed state, the limit pin can fall through the arc-shaped opening to the lower end surface of the slot, and the outer side surface of the limit pin abuts against the connecting hook to prevent it from rotating.

[0009] Furthermore, one end of the spring is fixed to the bottom of the slot, and the other end of the spring is fixed to the side of one end of the connecting hook away from its hinge point.

[0010] Furthermore, the guide rail is used to guide the connecting hook to rotate toward the middle of the connecting seat body. The mine car connecting device for removing the hook from the end of a mine car according to claim 2 is characterized in that a semicircular protrusion is protruding from the end of the connecting hook away from its hinge point, and the semicircular protrusion is used to contact the track surface of the guide rail and move along the track surface when two mine cars are connected.

[0011] Furthermore, the upper end of the pin extends from the top of the connecting seat body, and a pin sleeve is provided on the outside of the extended part of the pin, and the pin sleeve is sleeved on the outside of the pin.

[0012] Furthermore, a fixing cylinder is provided on the outside of the limit pin at the top of the connecting seat body, and the limit pin can slide up and down through the fixing cylinder. A limit groove with a penetrating structure is provided at a relative position on the side of the fixing cylinder, and limit blocks are fixed on both sides of the pin at the position corresponding to the limit groove. The limit blocks are arranged in the limit groove and can limit the area of ​​sliding up and down in the limit groove.

[0013] Furthermore, a small electric cylinder is fixed above the fixing cylinder through a support frame, and the protruding end of the small electric cylinder is vertically downwardly arranged and slides through the support frame to be fixedly connected to the upper end of the limit pin.

[0014] Furthermore, the support frame includes a horizontally arranged support plate, a plurality of support oblique rods are provided below the support plate and on the outside of the fixed cylinder, a plurality of the support oblique rods are fixedly provided at equal intervals along the circumference of the top edge of the fixed cylinder, the plurality of support oblique rods all extend obliquely upward toward the outside of the fixed cylinder, the upper ends of the plurality of support oblique rods are all fixedly connected to the bottom surface of the support plate, a small electric cylinder is vertically installed on the top surface of the support plate, the protruding end of the small electric cylinder slides through the support plate and is connected to the top of the limit pin to control its sliding.

[0015] Furthermore, the end of the connecting seat away from the mining car body is an outward convex arc structure.

[0016] Furthermore, an arc-shaped opening is provided at one end of the connecting hook near its hinge point and is adapted to the outer side surface of the limit pin. When the connecting hook is in an open state, the bottom of the limit pin abuts against the upper end surface of the connecting hook and is not embedded in the arc-shaped opening. When the two connecting hooks at the front and rear ends of the mine car are in a connected state, the limit pin falls to the lower end surface of the slot, and the limit pin is embedded in the arc-shaped opening to lock the connecting hook. When uncoupling is required, it is only necessary to lift the limit pin and apply a dragging force to one of the mine cars to separate the two.

[0017] A working method of a mine car connecting device for removing a hook at the end of a mine car, the steps of which are as follows:

[0018] When the two front and rear ends of the mine car connecting devices are connected by hooks, the two mine cars are pushed to move relative to each other, so that the ends of the connecting hooks of the two mine car connecting devices contact the track surface of the guide rails of each other, slide along the track surface and gradually turn to close and finally become perpendicular to the connecting seat body, and the hook-shaped locks on the opposite connecting hooks in the two mine car connecting devices adapt to each other and lock. At this time, the control limit pin slides down and embeds into the arc-shaped opening, thereby pressing against the side of the connecting hook to prevent the connecting hook from rotating, thus completing the connection of the two mine cars;

[0019] When the mine car needs to be unhooked, the limit pin is moved upward to the top surface of the connecting hook to fix it, thereby eliminating the lock. Then, the connecting hook is opened away from the middle of the connecting seat body through the tension of the spring contraction, and the two mine cars move in opposite directions, thereby separating the hook locks on the two opposite connecting hooks, completing the separation of the two mine cars.

[0020] The hook and the yoke are connected by a spring, and the two ends of the spring are respectively connected to the bottom of the slot and the connecting hook, so that the two ends of the spring are connected to each other, so that the two ends of the spring are respectively connected to the bottom of the slot and the connecting hook, so that the two ends of the spring are connected to the bottom of the slot and the connecting hook, so that the two ends of the spring are respectively connected to the bottom of the slot and the connecting hook, so that the two ends of the spring are connected to the bottom of the slot and the connecting hook, so that the two ends of the spring are connected to the bottom of the slot and the connecting hook, so that the two The arrangement of the sliding connection between the limit pin and the top of the connecting seat body enables the staff to lift the upper end of the limit pin when the mine car needs to be unhooked, thereby causing the lower end surface of the limit pin to move above the top surface of the connecting hook, and then the connecting hook is rotated away from the middle of the connecting seat body by the tension of the spring contraction, and cooperates with the two mine cars to move in the opposite direction, thereby separating the hook-shaped locks on the two opposite connecting hooks, thereby realizing the unhooking operation of the mine car. The staff will not touch the hook lock connection during the unhooking process, thereby avoiding the staff from being squeezed or injured in the hands and feet due to improper operation, improper cooperation, etc. when manually unhooking; and the mine car connecting device has a consistent structure at the front and rear ends of the mine car, and there is no need to match the connection structures of the front and rear ends when the mine cars are connected, thereby improving its applicability, and the connecting device has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of a mine car connecting device for removing a hook at the end of a mine car according to an embodiment of the present invention.

[0022] Figure 2 It is a three-dimensional cross-sectional view of a mine car connecting device for removing a hook at the end of a mine car according to an embodiment of the present invention.

[0023] Figure 3 It is a side sectional view of a mine car connecting device for removing a hook at the end of a mine car according to an embodiment of the present invention.

[0024] Figure 4 This is a three-dimensional view of a connected mine car connecting device for removing a hook at the end of a mine car according to an embodiment of the present invention.

[0025] Figure 5It is a three-dimensional cross-sectional view of a mine car connecting device for removing a hook at the end of a mine car after connection according to an embodiment of the present invention.

[0026] Figure 6 It is a top view of a connected mine car connecting device for removing a hook at the end of a mine car according to an embodiment of the present invention.

[0027] Figure 7 It is a top cross-sectional view of a mine car connecting device for removing a hook at the end of a mine car after connection according to an embodiment of the present invention.

[0028] Figure 8 It is a three-dimensional structural diagram of an electric control device for controlling a limit pin in an embodiment of the present invention.

[0029] Figure 9 It is a three-dimensional structural diagram of an electric control device for controlling a limit pin in an embodiment of the present invention.

[0030] Figure numerals: 1. Connecting seat; 2. Notch; 3. Connecting hook; 4. Hook lock; 5. Spring; 6. Guide rail; 7. Limit pin; 8. Fixing cylinder; 9. Limit groove; 10. Limit block; 11. Pin shaft; 12. Pin shaft sleeve; 13. Contact block; 14. Limit recess; 15. Arc-shaped opening; 16. Semicircular protrusion; 17. Support plate; 18. Small electric cylinder; 19. Support diagonal rod. DETAILED DESCRIPTION

[0031] In order to make the contents of this application easier to understand, the technical solutions in the embodiments of this application will be described clearly and completely below in conjunction with the drawings in the embodiments of this application.

[0032] Example 1:

[0033] like Figures 1 to 7As shown, a mine car connecting device for unhooking the hook at the end of a mine car comprises a connecting seat body 1, a notch 2, a connecting hook 3, a hook-shaped lock 4, a spring 5, a guide rail 6 and a limit pin 7. The front and rear ends of the mine car body are fixed with a connecting seat body 1, and a notch 2 is opened at the end of the connecting seat body 1 away from the car body. A connecting hook 3 that can rotate in the horizontal direction is hingedly provided in the notch 2. Specifically, the connecting hook 3 is rotatably connected to the connecting seat body 1 through a pin shaft 11, and a pin shaft sleeve 12 is fixed on the top of the connecting seat body 1, and the pin shaft sleeve 12 is sleeved on the outside of the pin shaft 11. The pin shaft 11 can also be set to a detachable design for easy installation and disassembly. The end of the connecting hook 3 away from its hinge point extends out of the notch 2 and is provided with a hook-shaped lock 4. A spring 5 is provided on one side of the notch 2, and one end of the spring 5 is fixed The cam 5 is fixed at the bottom of the slot 2, and the other end of the spring 5 is fixed to the side of the end of the connecting hook 3 away from its hinge point, wherein the central axis of the spring 5 is set in the horizontal direction, so that the elastic direction of the spring 5 is in the horizontal direction, so as to facilitate the pulling back of the connecting hook 3. A guide rail 6 is fixed on the other side of the slot 2 to match the end of the connecting hook 3. The guide rail 6 is used to guide the connecting hook 3 to rotate toward the middle of the connecting seat body 1. A limit pin 7 is provided on the top of the connecting seat body 1 to limit the rotational displacement of the connecting hook 3. When the connecting hook 3 is in the open state, the bottom of the limit pin 7 contacts the upper end surface of the connecting hook 3. When the two connecting hooks 3 at the front and rear end of the mine car are in the connected state, the limit pin 7 falls to the lower end surface of the slot 2, and the outer side surface of the limit pin 7 contacts the connecting hook 3 to prevent it from rotating. When the front and rear ends of the two mine cars are connected, the end of the connecting hook 3 contacts the track surface on the guide rail 6 and slides along the track surface and turns to the middle of the connecting seat 1 and finally becomes perpendicular to the connecting seat 1, and the hook-shaped locks 4 on the two opposite connecting hooks 3 adapt to each other and lock. At this time, the lower end of the limit pin 7 falls to the lower end surface of the notch 2, and the outer side surface of the limit pin 7 presses against the side surface of the connecting hook 3 to prevent the connecting hook 3 from rotating, thereby realizing automatic hooking and stringing between the two mine cars, avoiding the workers from being squeezed or injured in the hands and feet due to improper operation and improper cooperation when manually hooking. When the trolley is unhooked, the staff will lift the upper end of the limit pin 7, thereby making the lower end surface of the limit pin 7 move above the top surface of the connecting hook 3, and then the connecting hook 3 is rotated away from the middle of the connecting seat 1 by the tension of the contraction of the spring 5, and cooperates with the reverse movement of the two trolleys, thereby separating the hook locks 4 on the two opposite connecting hooks 3, thereby realizing the unhooking operation of the trolley. The staff will not touch the hook lock connection during the unhooking process, thereby avoiding the staff from being squeezed or injured in the hands and feet due to improper operation, improper cooperation, etc. when manually unhooking.

[0034] In one embodiment, combined Figure 5 and Figure 7 The track surface of the guide rail 6 and the end of the connecting hook 3 are adapted to be designed with an oblique mouth. When the front and rear ends of the two mine cars are connected, the end of the connecting hook 3 slides along the track surface of the guide rail 6 and turns to the middle of the connecting seat body 1 and finally becomes perpendicular to the connecting seat body 1. The hook-shaped locks 4 on the two connecting hooks 3 adapt to each other and lock. In this design, the track surface of the connecting hook 3 is set to an oblique mouth design, and then when the two mine cars are connected, it can provide an extrusion force to the connecting hook 3 to rotate toward the middle of the connecting seat body 1, thereby facilitating the interlocking of the hook-shaped locks 4 on the two connecting hooks 3 when the connecting hook 3 rotates, thereby realizing automatic hook-and-string.

[0035] In one embodiment, referring to Figure 2 and Figure 7 A semicircular protrusion 16 is protruding from one end of the connecting hook 3 away from its hinge point. The semicircular protrusion 16 is used to contact the track surface of the guide rail 6 and move along the track surface when the two mine cars are connected. The design of the semicircular protrusion 16 can reduce the friction generated when sliding in contact with the track surface of the guide rail 6 to a certain extent.

[0036] In one embodiment, combined Figure 2 、 Figure 5 and Figure 7 , a contact block 13 is provided on one end of the connecting hook 3 near its hinge point toward the guide rail 6, and a limiting recess 14 is provided at the contact portion between the contact block 13 and the guide rail 6. The limiting recess 14 is located in an opening vertically opened in the middle of the guide rail 6, and the end of the guide rail 6 near the contact block 13 is adapted to the limiting recess 14 and can limit the maximum rotational displacement of the connecting hook 3, that is (as Figure 2 (As shown) when the connecting hook 3 is in the open state, the end of the guide rail 6 close to the contact block 13 conflicts with the side wall of the limiting recess 14, thereby limiting the maximum rotational displacement of the connecting hook 3.

[0037] In one embodiment, combined Figure 1 、 Figure 3 and Figure 4 The limit pin 7 is slidably connected to the top of the connecting seat body 1, and a fixing cylinder 8 is fixedly provided on the top of the connecting seat body 1, which is sleeved on the outside of the limit pin 7, and the limit pin 7 can slide up and down in the fixing cylinder 8. The opposite sides of the fixing cylinder 8 are penetrated by a limiting groove 9, and both sides of the limit pin 7 at the position corresponding to the limiting groove 9 are fixed with a limiting block 10, which is set in the limiting groove 9 and can slide up and down in the limiting groove 9. In this design, through the setting of the fixing cylinder 8, the limit pin 7 can be slidably arranged on the connecting seat body 1 more stably. Through the setting of the limiting groove 9 and the limiting block 10, the sliding amplitude of the limit pin 7 can be limited to prevent the limit pin 7 from slipping out of the fixed cylinder 8.

[0038] In one embodiment, combined Figure 6 and Figure 7 The end of the connecting seat body 1 away from the mine car body is an outward convex arc structure. This design can avoid the guide rail 6 from colliding with the connecting seat body 1 when the two mine cars are connected.

[0039] In one embodiment, combined Figure 2 、 Figure 3 and Figure 5 , an arc-shaped opening 15 is opened at one end of the connecting hook 3 near its hinge point, which is adapted to the outer side surface of the limit pin 7. When the connecting hook 3 is in the open state, the bottom of the limit pin 7 contacts the upper end surface of the connecting hook 3 and is not embedded in the arc-shaped opening 15. When the two connecting hooks 3 at the front and rear ends of the mine car are in the connected state, the limit pin 7 falls to the lower end surface of the slot 2, and the limit pin 7 is embedded in the arc-shaped opening 15 to prevent the connecting hook 3 from rotating, and the outer side surface of the limit pin 7 is adapted to the inner side surface of the arc-shaped opening 15.

[0040] Working principle: when the front and rear ends of the two mine cars are connected, the end of the connecting hook 3 contacts the track surface on the guide rail 6 and slides along the track surface and turns to the middle of the connecting seat body 1 and finally becomes perpendicular to the connecting seat body 1, and the hook-shaped locks 4 on the two opposite connecting hooks 3 adapt to each other and lock. At this time, the lower end of the limit pin 7 falls to the lower end surface of the slot 2, and the limit pin 7 is embedded in the arc opening 15 to press against the side of the connecting hook 3 to prevent the connecting hook 3 from rotating, thereby realizing automatic hooking and stringing between the two mine cars; when the mine car needs to be unhooked, the staff lifts the upper end of the limit pin 7, thereby moving the lower end surface of the limit pin 7 above the top surface of the connecting hook 3, and then the connecting hook 3 is rotated away from the middle of the connecting seat body 1 by the tension of the spring 5, and cooperates with the two mine cars to move in the opposite direction, thereby separating the hook-shaped locks 4 on the two opposite connecting hooks 3, thereby realizing the unhooking operation of the mine car.

[0041] Example 2:

[0042] The limit pin 7 is controlled by an electronic control device, combined with Figure 8 and Figure 9The electric control device includes a top edge of the fixed cylinder 8, and a plurality of supporting oblique rods 19 are fixed at equal intervals along its circumference. The plurality of supporting oblique rods 19 extend obliquely upward toward the outside of the fixed cylinder 8, and the upper ends of the plurality of supporting oblique rods 19 are fixedly connected to the bottom surface of the support plate 17. The support plate 17 is horizontally arranged, and a small electric cylinder 18 is vertically installed on the top surface of the support plate 17, and the protruding end of the small electric cylinder 18 is arranged vertically downward and slides through the support plate 17 and is fixedly connected to the upper end of the limit pin 7. Specifically, the small electric cylinder 18 is electrically connected to an external controller, and the controller can be embedded with remote control technology or PLC control technology, so that the staff can remotely or at a certain distance control the contraction of the protruding end of the small electric cylinder 18 to assist the mine car in unhooking.

[0043] When the trolley is unhooked, the staff controls the extension end of the small electric cylinder 18 to extend, thereby causing the limit pin 7 to move downward to embed in the arc-shaped opening 15 and press against the side of the connecting hook 3 to prevent the connecting hook 3 from rotating. When the trolley needs to unhook, the staff controls the extension end of the small electric cylinder 18 to retract, thereby causing the lower end face of the limit pin 7 to move above the top surface of the connecting hook 3, and then the connecting hook 3 is rotated away from the middle of the connecting seat 1 by the tension of the contraction of the spring 5, and cooperates with the reverse movement of the two trolleys to separate the hook locks 4 on the two opposite connecting hooks 3.

[0044] The above embodiments are intended only to illustrate the technical solutions of the embodiments of the present application and are not intended to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that, without departing from the spirit and scope defined by the claims of the present application, they may still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents.

Claims

1. A mine car connecting device for removing the hook at the end of a mine car, characterized by: The mine car connecting devices are fixedly provided at both the front and rear ends of the mine car body. When in use, the two mine car connecting devices are inserted into each other and locked. The invention relates to a connecting seat body (1), wherein a slot pointing to another mine car connecting device is provided on the connecting seat body (1), a single-action locking device simulating a crab claw structure is provided in the slot (2), the single-action locking device comprising a connecting hook (3) located on the left side of the slot (2) and capable of being opened and closed by a pin shaft (11), and a guide rail (6) located on the right side of the slot (2) and fixed, a semicircular protrusion (16) being provided at the end of the connecting hook (3), a hook-shaped lock (4) pointing in the direction of the guide rail (6) being provided laterally at the end of the connecting hook (3), the tail of the connecting hook (3) being hinged in the connecting seat body (1) by the pin shaft (11), the guide rail (6) being a right-angled triangle structure, the hypotenuse of the right-angled triangle structure being provided correspondingly to the guide rail (6), the end of the connecting hook (3) being connected to a spring (5) for making it open to the left, and the tail end of the connecting hook (3) being provided with a contact block capable of being clamped on the bottom side of the right-angled triangle of the guide rail (6) to limit the opening angle of the connecting hook (3) to the left (13), a limiting recess (14) is provided at the contact portion between the contact block (13) and the guide rail (6), and the limiting recess (14) is located in an opening formed vertically in the middle of the guide rail (6), and the end of the guide rail (6) close to the contact block (13) is adapted to the limiting recess (14) and can limit the maximum rotation displacement of the connecting hook (3), so that the connecting hook (3) can only be opened and closed within the designed limited space; the hypotenuse of the triangular structure of the guide rail (6) matches the upper semicircular protrusion (16) of the connecting hook (3) of the other mine car connecting device, and can guide the connecting hook (3) to move along the hypotenuse of the right triangle and gradually pull the spring (5), and the connecting hooks (3) of the two mine car connecting devices both move along the hypotenuse of the right triangle of the other mine car connecting device, and finally the two connecting hooks (3) are closed to each other under the pressure of the triangular structure of the other guide rail (6), and the hook-shaped locks (4) of both parties are buckled with each other to complete the connection; An arc-shaped opening (15) is provided on the tail end of the connecting hook (3), and a limit pin (7) is vertically provided on the connecting seat (1). When the connecting hook (3) is in an open state, the bottom of the limit pin (7) contacts the upper end surface of the connecting hook (3). When the connecting hooks (3) of the two mine car connecting devices are buckled and in a closed state, the limit pin (7) can fall through the arc-shaped opening (15) to the lower end surface of the slot (2), and the outer side surface of the limit pin (7) contacts the connecting hook (3) to prevent it from rotating.

2. A mine car connecting device for removing a hook from the end of a mine car according to claim 1, characterized in that: One end of the spring (5) is fixed to the bottom of the slot (2), and the other end of the spring (5) is fixed to the side of one end of the connecting hook (3) away from its hinge point.

3. A mine car connecting device for removing a hook from the end of a mine car according to claim 1, characterized in that: The guide rail (6) is used to guide the connecting hook (3) to perform a rotational movement toward the middle of the connecting seat body (1).

4. A mine car connecting device for removing a hook from the end of a mine car according to claim 1, characterized in that: The upper end of the pin shaft (11) extends from the top of the connecting seat body (1), and a pin shaft sleeve (12) is provided on the outer side of the extended portion of the pin shaft (11), and the pin shaft sleeve (12) is sleeved on the outer side of the pin shaft (11).

5. The mine car connecting device for removing the hook from the end of a mine car according to claim 1, characterized in that: A fixing cylinder (8) is provided on the outside of the limiting pin (7) at the top of the connecting seat body (1). The limiting pin (7) can slide up and down in the fixing cylinder (8). A limiting groove (9) with a penetrating structure is provided at a relative position on the side of the fixing cylinder (8). Limiting blocks (10) are fixed on both sides of the limiting pin (7) at a position corresponding to the limiting groove (9). The limiting blocks (10) are arranged in the limiting groove (9) and can limit the area of ​​sliding up and down in the limiting groove (9).

6. A mine car connecting device for removing a hook from the end of a mine car according to claim 5, characterized in that: A small electric cylinder (18) is fixedly provided above the fixed cylinder (8) via a support frame, and the extended end of the small electric cylinder (18) is vertically arranged downward and slides through the support frame to be fixedly connected to the upper end of the limit pin (7).

7. A mine car connecting device for removing a hook from the end of a mine car according to claim 6, characterized in that: The support frame includes a horizontally arranged support plate (17), a plurality of support oblique rods (19) are provided below the support plate (17) and on the outside of the fixed cylinder (8), a plurality of the support oblique rods (19) are fixedly provided at equal intervals along the circumference of the top edge of the fixed cylinder (8), the plurality of support oblique rods (19) all extend obliquely upward toward the outside of the fixed cylinder (8), the upper ends of the plurality of support oblique rods (19) are all fixedly connected to the bottom surface of the support plate (17), a small electric cylinder (18) is vertically installed on the top surface of the support plate (17), and the extended end of the small electric cylinder (18) slides through the support plate (17) and is connected to the top end of the limit pin (7) to control its sliding.

8. The mine car connecting device for removing the hook from the end of a mine car according to claim 1, characterized in that: The end of the connecting seat (1) away from the mine car body is an outward convex arc structure.

9. A mine car connecting device for removing a hook from the end of a mine car according to claim 8, characterized in that: The arc-shaped opening (15) is provided at one end of the connecting hook (3) near its hinge point and is adapted to the outer side surface of the limit pin (7). When the connecting hook (3) is in an open state, the bottom of the limit pin (7) contacts the upper end surface of the connecting hook (3) and is not embedded in the arc-shaped opening (15). When the two connecting hooks (3) at the front and rear ends of the mine car are in a connected state, the limit pin (7) falls to the lower end surface of the slot (2), and the limit pin (7) is embedded in the arc-shaped opening (15), locking the connecting hook (3). When uncoupling is required, the limit pin (7) only needs to be lifted and a dragging force is applied to one of the mine cars to separate the two.

10. A working method using the mine car connection device for removing the hook at the end of a mine car according to any one of claims 1 to 9, characterized in that Here are the steps: When two mine carts with mine cart connection devices at the front and rear ends are connected, the two mine carts are pushed to move relative to each other, so that the ends of the connection hooks (3) of the two mine cart connection devices contact the hypotenuse of the right-angled triangle structure on the guide rail (6) of the other party, slide along the hypotenuse of the right-angled triangle structure and gradually turn to close and finally become perpendicular to the connection seat (1), and the hook locks (4) on the opposite connection hooks (3) in the two mine cart connection devices adapt to each other and lock, at this time, the control limit pin (7) slides down and embeds into the arc-shaped opening (15), thereby pressing against the side of the connection hook (3) to prevent the connection hook (3) from rotating, thereby completing the connection of the two mine carts; When the mine car needs to be unhooked, the limit pin (7) is moved upward to the top surface of the connecting hook (3) to be fixed, thereby eliminating the lock, and then the connecting hook (3) is opened away from the middle of the connecting seat (1) by the tension of the contraction of the spring (5), and cooperates with the two mine cars to move in the opposite direction, thereby separating the hook locks (4) on the two opposite connecting hooks (3), and completing the separation of the two mine cars.

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