Collision energy absorption structure of mining shuttle car

Abstract

The present invention discloses a collision energy absorption structure for a mining shuttle car, comprising a shuttle car body and a shuttle car cab, wherein the shuttle car cab is installed on the top of the shuttle car body, and a collision energy absorber is arranged at the head end of the shuttle car body. The beneficial effect of the present invention is that the collision energy absorption structure for a mining shuttle car can be widely used to protect the mining shuttle car from colliding with tunnels, the shuttle car from colliding with other equipment such as continuous coal mining machines, and the collision energy absorption structure can take into account both collision buffering and collision energy absorption to solve the safety problems caused by the rigid collision of the shuttle car, so that the shuttle car can play the role of mitigating impact and absorbing energy when a collision inevitably occurs, and no sparks are generated, so as to further improve the safety of the shuttle car application.

Description

Technical Field

[0001] The invention relates to the technical field of mining equipment, in particular to a collision energy absorbing structure of a mining shuttle car. Background Art

[0002] In the process of coal mining in underground coal mines, the coordination of mining and excavation is an important issue that affects the production progress. As one of the key supporting equipment for tunnel excavation, the shuttle car has the main function of loading coal from the continuous coal mining machine and transporting it to the feeder crusher for unloading. Considering the convenience of coal loading and unloading, when designing the structure of the shuttle car, the cab of the shuttle car is arranged on the side of the car body away from the continuous coal mining machine, which makes it easy for the shuttle car to collide with the tunnel and operating equipment;

[0003] In the prior art, in order to solve the collision buffering problem between the shuttle car and the tunnel, an anti-collision belt is designed on the surface of the tunnel. For example, the utility model patent with the Chinese patent authorization announcement number: CN208686428U and the authorization announcement date: April 2, 2019 discloses a collision buffering device for a rubber-wheeled vehicle for mining, which includes an anti-collision belt fixed to the walls on both sides of the tunnel, which plays a buffering role when the shuttle car collides with the tunnel. However, the device cannot solve the collision buffering problem between the shuttle car and the continuous coal mining machine. In addition, in the prior art, in order to solve the collision buffering problem between mine cars and mine cars or mine cars and other equipment, a collision buffering structure is added to the front end of the mine car. For example, the invention patent with the Chinese patent authorization announcement number: CN103569151A and the authorization announcement date: February 12, 2014 discloses a mine car buffer structure, which includes a bumper seat, a rubber bumper, a spring, and a positioning pin shaft, wherein the bumper seat is a steel casting with a cavity closed on three sides, and the cavity is equipped with a rubber bumper and a spring, which is used to buffer the impact generated when the mine car is connected to the mine car or the mine car is connected to other equipment. In summary, the existing shuttle car collision buffer structure still has the following problems:

[0004] (1) The existing method to solve the above problem is to set a rigid anti-collision structure with sufficient stiffness and strength at the front and rear ends of the shuttle car to prevent the shuttle cars from being damaged due to collision. However, this structure can easily cause the shuttle car to lose steering control and damage the control system and body structure, leading to safety accidents and seriously affecting the safety of underground work.

[0005] (2) The existing collision buffer structure for shuttle cars mainly uses the collision buffer structure installed in the roadway to solve the collision buffer problem between the shuttle car and the roadway, but cannot solve the collision problem between the shuttle car and the continuous coal mining machine;

[0006] The existing collision buffer structure used in mining vehicles can only mitigate the impact of collisions, but cannot absorb the collision energy. This results in the inability of the collision rebound energy to decay quickly, causing steering loss of control or secondary collisions, and even damaging the steering system and vehicle structure. In view of this, in-depth research on the above issues led to the creation of this case. Summary of the invention

[0007] The purpose of the present invention is to solve the above problems, design a collision energy absorption structure for a mining shuttle car, and solve the existing background technology problems.

[0008] The technical solution of the present invention to achieve the above-mentioned purpose is: a collision energy absorption structure of a mining shuttle car, comprising a shuttle car body and a shuttle car cab, wherein the shuttle car cab is installed on the top of the shuttle car body, and a collision energy absorber is arranged at the head end of the shuttle car body;

[0009] The collision energy absorber comprises: a collision device base, a pair of guide rails, a pair of extension plates, a plurality of collision buffer springs, a plurality of damping energy absorbers and a pair of limit plates;

[0010] The impactor base is mounted on the head end of the shuttle body, and the impactor base is a plate with a C-shaped structure;

[0011] A pair of guide rails are arranged on both sides of the collision device base, and collision sliding ends are arranged on the pair of guide rails;

[0012] A pair of extension plates are extended from the upper and lower sides of the collision sliding end and are mounted on a pair of guide rails;

[0013] A plurality of collision buffer springs and a plurality of damping energy absorbers are arranged between the collision sliding end and the collision device base;

[0014] A plurality of the damping energy absorbers are inserted into a plurality of collision buffer springs, and the two ends of the collision buffer spring and the damping energy absorber are respectively connected to the collision device base and the collision sliding end;

[0015] The damping energy absorber comprises: a damper housing, a sliding piston, a plurality of single-hole and multi-hole one-way valves and a piston connecting rod;

[0016] One end of the damper housing is installed on the impactor base, and the damper housing contains a cylindrical sealed cavity. The sliding piston is assembled in the damper housing. The sliding piston is provided with a plurality of single-hole and multi-hole one-way valves arranged in a circular array in the center. One side of the sliding piston is connected to a piston connecting rod, and one end of the piston connecting rod passes through the damper housing and is connected to the impact sliding end.

[0017] The sliding piston is provided with four guide holes, and a porous valve plate is fixed on the upper surface of the guide hole by rivets. The porous valve plate is made of high-strength spring steel, and a damping hole is provided on the porous valve plate. The sliding piston divides the cavity in the damper housing into an upper cavity and a lower cavity. The upper cavity and the lower cavity are filled with oil. When collision compression occurs, the sliding piston moves downward so that the oil in the lower cavity directly pushes the porous valve plate open and reaches the upper cavity. After the action is completed, the porous valve plate returns to its original position under the action of its own elasticity and closes the guide hole, and at this time the oil can only flow through the damping hole on the porous valve plate.

[0018] A pair of parallel limiting plates extend from both sides of the head end of the shuttle body, and the pair of limiting plates are wrapped around the two ends of the collision device base to limit the linear motion of the collision sliding end.

[0019] A pair of first limit blocks are arranged at both ends of the collision sliding end, and a pair of second limit blocks matching the first limit blocks are arranged at both sides of the collision device base.

[0020] The end of the collision sliding end is bonded with a rubber bumper.

[0021] The damper housing is provided with a damper fixing shaft which is installed on the impactor base.

[0022] A hydraulic control oil nozzle is arranged at the end of the damper housing.

[0023] The hydraulic control oil nozzle comprises: a connecting seat, an oil injection nozzle, a sealing ball and a normal pressure spring;

[0024] The connecting seat is installed on one end of the damper housing, and an oil injection nozzle is arranged on the connecting seat. The oil injection nozzle is a cylindrical cavity structure and a through hole smaller than the diameter of the inner cavity is opened at the end. A sealing ball is installed in the oil injection nozzle. A normal pressure spring is arranged on one side of the sealing ball and connected to the connecting seat. A through hole is arranged between the connecting seat and the oil injection nozzle.

[0025] An oil filling port is provided at the end of the damper housing, and the oil filling port is threadedly connected to the connecting seat.

[0026] The mining shuttle car collision energy absorption structure manufactured using the technical solution of the present invention can be widely used to protect mining shuttle cars from colliding with tunnels, shuttle cars from colliding with other equipment such as continuous coal mining machines, and can take into account both collision buffering and collision energy absorption to solve the safety problems caused by the rigid collision of the shuttle car, so that the shuttle car can mitigate the impact and absorb energy when a collision inevitably occurs, and no sparks are generated, so as to further improve the safety of the shuttle car application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a schematic diagram of the main structure of the collision energy absorption structure of the mining shuttle car according to the present invention.

[0028] Figure 2 The present invention is a schematic diagram of the structure of the collision energy absorber of the mining shuttle car collision energy absorption structure.

[0029] Figure 3 The present invention is a schematic diagram of the structure of the damping energy absorber of the collision energy absorption structure of the mining shuttle car.

[0030] Figure 4 It is a schematic diagram of the collision buffer spring structure of the collision energy absorption structure of the mining shuttle car of the present invention.

[0031] Figure 5 This is a schematic diagram of the hydraulic control nozzle structure of the mining shuttle car collision energy absorption structure of the present invention.

[0032] In the figure: 1. shuttle body; 2. shuttle cab; 3. impactor base; 4. guide rail; 5. extension plate; 6. collision buffer spring; 7. damping energy absorber; 8. limit plate; 9. hydraulic control oil nozzle; 10. first limit block; 11. second limit block; 12. rubber bumper; 13. collision sliding end; 71. damper housing; 72. sliding piston; 73. single and multi-hole one-way valve; 74. piston connecting rod; 75. damper fixed shaft; 91. connecting seat; 92. oil filling nozzle; 93. blocking ball; 94. normal pressure spring; 95. oil filling port; 731. guide hole; 732. multi-hole valve plate; 733. damping hole. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings. Figure 1-5 shown.

[0034] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0035] Embodiment: In the process of coal mining in underground coal mines, the shuttle car is easy to collide with the roadway and operating equipment. The main reasons are three points: 1. Since the cab is on one side of the shuttle car body, and in order to improve the loading quality, the overall structure size of the shuttle car is large, resulting in a large visual blind spot for the driver when driving the shuttle car. In the actual operation process, it is easy to collide with various operating equipment and operators, which poses a great safety hazard;

[0036] 2. When the shuttle car is loading coal at the continuous coal miner, it needs to extend into the lower end of the continuous coal miner to receive the coal, which will inevitably cause a collision between the shuttle car and the continuous coal miner;

[0037] 3. When working underground, due to the high dust concentration in the tunnel and the inconsistent light levels, collisions with the tunnel are inevitable;

[0038] To solve the above problems, the existing processing method usually adopts a rigid anti-collision structure welded on the front and rear ends of the shuttle car to achieve rigid collision. This collision structure not only has a large impact, but also easily generates sparks and is not easy to use in an environment with coal powder and gas.

[0039] According to the instruction manual Figure 1-5 It can be seen that this case discloses a collision energy absorption structure of a mining shuttle car to solve the above problems, including a shuttle car body 1 and a shuttle car cab 2, the shuttle car cab 2 is installed on the top of the shuttle car body 1, and a collision energy absorber is arranged at the head end of the shuttle car body 1. In the specific implementation process, the shuttle car cab 2 is far away from the head end of the shuttle car body 1. In order to reduce the impact of the collision, a collision energy absorber is designed at the head end of the shuttle car body 1;

[0040] According to the instruction manual Figure 1-5 It can be seen that the above-mentioned collision energy absorber includes: a collision device base 3, a pair of guide rails 4, a pair of extension plates 5, a plurality of collision buffer springs 6, a plurality of damping energy absorbers 7 and a pair of limit plates 8, and their connection relationship and position relationship are as follows;

[0041] The impactor base 3 is mounted on the head end of the shuttle body 1, and the impactor base 3 is a plate of a C-shaped structure;

[0042] A pair of guide rails 4 are provided on both sides of the impactor base 3, and a collision sliding end 13 is provided on the pair of guide rails 4;

[0043] A pair of extension plates 5 are extended from the upper and lower sides of the collision sliding end 13 and assembled on a pair of guide rails 4;

[0044] A plurality of collision buffer springs 6 and a plurality of damping energy absorbers 7 are arranged between the collision sliding end 13 and the collision device base 3;

[0045] A plurality of damping energy absorbers 7 are inserted into a plurality of collision springs, and the two ends of the collision buffer spring 6 and the damping energy absorber 7 are respectively connected to the collision device base 3 and the collision sliding end 13;

[0046] A pair of parallel limit plates 8 extend from both sides of the head end of the shuttle body 1, and the pair of limit plates 8 wrap around the two ends of the impactor base 3 to limit the linear motion of the impact sliding end 13;

[0047] In the specific implementation process, the impactor base 3 is fixed to the head end of the shuttle body 1 by bolts. The impactor base 3 is the basis for installing the collision energy absorber. At the same time, a pair of limit plates 8 are arranged on both sides of the head end of the shuttle body 1 to wrap and protect it. A pair of guide rails 4 on both sides of the impactor base 3 are used to assemble the collision sliding end 13. At the same time, the collision sliding end 13 is limited in four directions of up, down, left and right with a pair of limit plates 8, so that it can only slide in a straight line. The collision buffer spring 6 on the shuttle body 1 and the damping energy absorber 7 are used to buffer and absorb energy of the collision sliding end 13. After completion, the damping energy absorber 7 and the collision sliding end 13 are reset under the drive of the collision buffer spring 6, reducing the impact of the collision on the shuttle body 1, and avoiding sparks and other problems caused by the rigid collision of the head end. The damping energy absorber 7 is connected to the hydraulic oil circuit in the car. The collision buffer spring 6 designed in this case has a cone angle of about 20°, a pitch of about 30mm at both ends, a diameter of about 100mm, a pitch of about 60mm in the middle, a diameter of about 150mm, a free length of about 480mm, and is made of high-strength spring steel with a spring wire diameter of about 15mm.

[0048] A pair of first limit blocks 10 are arranged at both ends of the collision sliding end 13 , and a pair of second limit blocks 11 matching the first limit blocks 10 are arranged on both sides of the collision base 3 to prevent over-movement between the collision base 3 and the collision sliding end 13 .

[0049] The end of the collision sliding end 13 is bonded with a rubber bumper 12 to further reduce the impact and avoid sparks caused by metal collision.

[0050] According to the instruction manual Figure 1-5 It can be seen that the damping energy absorber 7 comprises: a damper housing 71, a sliding piston 72, a plurality of single-hole and multi-hole one-way valves 73 and a piston connecting rod 74, and the connection relationship and position relationship thereof are as follows;

[0051] One end of the damper housing 71 is mounted on the impactor base 3. The damper housing 71 has a cylindrical sealed cavity. The sliding piston 72 is assembled in the damper housing 71. The sliding piston 72 is provided with a plurality of single-hole and multi-hole one-way valves 73 arranged in a circular array in the center. A piston connecting rod 74 is connected to one side of the sliding piston 72. One end of the piston connecting rod 74 passes through the damper housing 71 and is connected to the impact sliding end 13.

[0052] During the specific implementation process, one end of the damper housing 71 is fixed on the impactor base 3, a sliding piston 72 is arranged in the damper housing 71, a piston connecting rod 74 is connected to the sliding piston 72 for synchronous action, the piston connecting rod 74 is connected to the impact sliding end 13, a damper fixed shaft 75 is arranged on the damper housing 71 and installed on the impactor base 3, a hydraulic control oil nozzle 9 is arranged at the end of the damper housing 71 for replenishing oil to the damper, the diameter of the sliding piston 72 is about 70 mm, and four guide holes 731 with a diameter of about 10 mm are opened on the piston, and a porous valve plate 732 with a diameter of about 15 mm is fixed on its upper surface by rivets, the thickness of the valve plate is about 5 mm, and it is made of high-strength spring steel, and 6-8 damping holes 733 with an average diameter of about 1.5 mm are opened on the porous valve plate 732. In the damper housing 71, the cavity in the damper housing 71 is divided into an upper cavity and a lower cavity by the separating action of the sliding piston 72, and the upper cavity and the lower cavity are filled with oil. When collision compression occurs, the sliding piston 72 moves downward, and the oil in the lower cavity directly pushes the porous valve plate 732 to reach the upper cavity. After the action is completed, the porous valve plate 732 returns to its original position under the action of its own elasticity, and closes the guide hole 731. At this time, the oil can only flow through the damping hole 733 on the porous valve plate 732. In this process, the damping energy absorber 7 basically does not work, so that the buffering effect of the collision buffer spring 6 can be maximized to reduce the collision acceleration; when the collision rebounds, the oil can only reach the lower cavity from the upper cavity through the damping hole 733 on the porous valve plate 732. In this process, because the damping hole 733 is very small and the viscous resistance is very large, the energy stored in the collision buffer spring 6 is consumed as much as possible to reduce the rebound force and energy, and prevent structural damage or secondary collision damage due to the large spring rebound force.

[0053] According to the instruction manual Figure 1-5 It can be seen that the hydraulic control oil nozzle 9 includes: a connecting seat 91, an oil injection nozzle 92, a blocking ball 93 and a normal pressure spring 94, and the connection relationship and position relationship thereof are as follows;

[0054] The connecting seat 91 is mounted on one end of the damper housing 71. An oiling nozzle 92 is provided on the connecting seat 91. The oiling nozzle 92 is a cylindrical cavity structure and a through hole smaller than the diameter of the inner cavity is opened at the end. A blocking ball 93 is installed in the oiling nozzle 92. A normal pressure spring 94 is provided on one side of the blocking ball 93 and connected to the connecting seat 91. A through hole is provided between the connecting seat 91 and the oiling nozzle 92.

[0055] During the specific implementation process, an oil filling port 95 is opened at the end of the damper housing 71, and the oil filling port 95 is threadedly connected to the connecting seat 91 for replenishing oil to the damping energy absorber 7. When no liquid is added, the sealing ball 93 blocks the oil filling nozzle 92 under the action of the normal pressure spring 94. When oil is added, the oil pressure of the external pipeline overcomes the normal pressure spring 94 and the internal oil pressure, and pushes the sealing ball 93 away to open the oil filling nozzle 92. The oil filling nozzle 92 forms a connecting oil path from the through hole to the inner cavity of the damper housing 71. After the filling is completed, the sealing ball 93 returns to its original position under the action of the normal pressure spring 94 to achieve oil nozzle sealing.

[0056] To sum up, it can be generally known that the collision energy absorption structure of the mining shuttle car can be widely used to protect the mining shuttle car from colliding with tunnels, the shuttle car from colliding with other equipment such as continuous coal mining machines, and the collision energy absorption structure can take into account both collision buffering and collision energy absorption to solve the safety problems caused by the rigid collision of the shuttle car, so that the shuttle car can play a role in mitigating impact and absorbing energy when a collision inevitably occurs, and no sparks are generated, so as to further improve the safety of the shuttle car application.

[0057] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A mining shuttle car collision energy absorption structure, comprising a shuttle car body (1) and a shuttle car cab (2), wherein the shuttle car cab (2) is mounted on the top of the shuttle car body (1), and is characterized in that: A collision energy absorber is provided at the head end of the shuttle body (1); The collision energy absorber comprises: a collision device base (3), a pair of guide rails (4), a pair of extension plates (5), a plurality of collision buffer springs (6), a plurality of damping energy absorbers (7) and a pair of limit plates (8); The impactor base (3) is mounted on the head end of the shuttle body (1), and the impactor base (3) is a plate with a C-shaped structure; A pair of guide rails (4) are provided on both sides of the collision device base (3), and collision sliding ends (13) are provided on the pair of guide rails (4); A pair of extension plates (5) extend from the upper and lower sides of the collision sliding end (13) and are mounted on a pair of guide rails (4); A plurality of collision buffer springs (6) and a plurality of damping energy absorbers (7) are arranged between the collision sliding end (13) and the collision device base (3); A plurality of the damping energy absorbers (7) are inserted into a plurality of collision buffer springs (6), and the two ends of the collision buffer springs (6) and the damping energy absorbers (7) are respectively connected to the collision device base (3) and the collision sliding end (13); A pair of parallel limit plates (8) extend from both sides of the head end of the shuttle body (1), and the pair of limit plates (8) are wrapped around the two ends of the impactor base (3) to limit the linear movement of the impact sliding end (13); The damping energy absorber (7) comprises: a damper housing (71), a sliding piston (72), a plurality of single-hole and multi-hole one-way valves (73) and a piston connecting rod (74); One end of the damper housing (71) is mounted on the impactor base (3); the damper housing (71) contains a cylindrical sealed cavity; the sliding piston (72) is mounted in the damper housing (71); the sliding piston (72) is provided with a plurality of single-hole and multi-hole one-way valves (73) arranged in a circular array in the center; one side of the sliding piston (72) is connected to a piston connecting rod (74); one end of the piston connecting rod (74) passes through the damper housing (71) and is connected to the impact sliding end (13); four guide holes (731) are formed on the sliding piston (72); a multi-hole valve plate is fixed to the upper surface of the guide hole (731) by rivets (732), the porous valve plate (732) is made of high-strength spring steel, and 6-8 damping holes (733) are opened on the porous valve plate (732); the sliding piston (72) divides the cavity inside the damper housing (71) into an upper cavity and a lower cavity, and the upper cavity and the lower cavity are filled with oil. When collision compression occurs, the sliding piston (72) moves downward so that the oil in the lower cavity directly pushes the porous valve plate (732) and reaches the upper cavity. After the action is completed, the porous valve plate (732) returns to its original position under the action of its own elasticity and closes the guide hole (731), and at this time, the oil can only flow through the damping hole (733) on the porous valve plate (732).

2. The collision energy absorption structure of a mining shuttle car according to claim 1 is characterized in that: A pair of first limit blocks (10) are provided at both ends of the collision sliding end (13), and a pair of second limit blocks (11) matching the first limit blocks (10) are provided at both sides of the collision device base (3).

3. The collision energy absorption structure of a mining shuttle car according to claim 1 is characterized in that: A rubber bumper (12) is bonded to the end of the collision sliding end (13).

4. The collision energy absorption structure of a mining shuttle car according to claim 1 is characterized in that: The damper housing (71) is provided with a damper fixing shaft (75), and the damper fixing shaft (75) is mounted on the impactor base (3).

5. The collision energy absorption structure of a mining shuttle car according to claim 1 is characterized in that: A hydraulic control oil nozzle (9) is provided at the end of the damper housing (71).

6. The collision energy absorption structure of a mining shuttle car according to claim 5, characterized in that: The hydraulic control nozzle (9) It comprises: a connecting seat (91), an oil injection nozzle (92), a sealing ball (93) and a normal pressure spring (94); The connecting seat (91) is mounted on one end of the damper housing (71), and an oiling nozzle (92) is provided on the connecting seat (91). The oiling nozzle (92) is a cylindrical cavity structure and has a through hole smaller than the diameter of the inner cavity at the end thereof. A sealing ball (93) is installed in the oiling nozzle (92), and a constant pressure spring (94) is provided on one side of the sealing ball (93) and is connected to the connecting seat (91). A through hole is provided between the connecting seat (91) and the oiling nozzle (92).

7. The collision energy absorption structure of a mining shuttle car according to claim 1 is characterized in that: An oil filling port (95) is provided at the end of the damper housing (71), and the oil filling port (95) is threadedly connected to the connecting seat (91).

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