An anti-falling mechanism for dragging mine cars in inclined shafts

Abstract

The present invention provides an anti-falling mechanism for towing mine cars in inclined shafts, which includes a brake trigger device, a power source device, a brake device, and a traction arm installed on the vehicle body. The traction arm has its front end connected to the towing rope of the external towing system and its rear end rotatably connected to the front end of the vehicle body. The brake trigger device is installed at the front end of the vehicle body and includes a vertical rotating shaft, a limit support block, a hinged arm, a gravity block, and a link assembly. The brake device consists of a brake steel wire rope and N brake brakes arranged in a straight line array along the vehicle running track. By setting a brake device different from the disc brake and a mechanical brake trigger device on the towing vehicle, when the vehicle body slides and falls on the slope, automatic and timely braking can be achieved, with high efficiency, smoothness, and safety in braking, effectively preventing the risk of vehicle sliding and falling and eliminating potential safety hazards in mine production.

Description

Technical Field

[0001] The present invention relates to mining machinery, in particular to a towing vehicle used in mines, specifically an anti-falling mechanism for towing mine cars in inclined shafts. Background Art

[0002] The towing vehicles used in mines usually run on rails, including personnel carriers and material carriers for carrying goods. When running on flat ground, the braking of the vehicle is completed by the brake of the wire rope drum or the disc brake installed on the wheels. However, when running on a slope, due to the large self-weight and high center of gravity of the fully loaded material carrier, and usually there is no one on the vehicle, once the towing rope breaks and the material carrier slides down, the disc brake cannot be operated, which will pose a great safety hazard to the construction site below the slope. Summary of the Invention

[0003] Aiming at the problems raised in the background art, the purpose of the present invention is to provide an anti-falling mechanism for towing mine cars in inclined shafts, which is provided with a braking device different from the disc brake on the towing vehicle. When the vehicle body slides down on the slope, it can perform automatic and timely braking, effectively preventing the risk of vehicle sliding down and eliminating potential safety hazards in mine production.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An anti-falling mechanism for towing mine cars in inclined shafts, comprising a brake trigger device, a power source device, a brake device and a towing arm installed on the vehicle body. The front end of the towing arm is connected to the towing rope of the external towing system, and the rear end is rotatably connected to the front end of the vehicle body;

[0006] The power source device is provided with a position switch, and the position switch is installed above the rear end of the towing arm;

[0007] The brake trigger device is installed at the front end of the vehicle body. The brake trigger device includes a vertical rotating shaft, a limit support block, a hinged arm, a gravity block and a connecting rod assembly. The gravity block is rotatably connected to the vehicle body. The vertical rotating shafts are symmetrically arranged on both sides of the middle part of the towing arm. Each vertical rotating shaft is provided with a limit support block and a hinged arm. The hinged arms on each vertical rotating shaft are respectively connected to the gravity block through the connecting rod assembly; when the vehicle body runs horizontally, both limit support blocks support the towing arm; when the vehicle body enters the inclined track, due to the rotation of the gravity block, the gravity block drives the vertical rotating shaft to rotate through the connecting rod assembly, and rotates the two limit support blocks to the outside of both sides of the towing arm, so that the towing arm loses support. If the towing rope breaks, the rear end of the towing arm will rise due to rotation, triggering the position switch of the power source device;

[0008] The described braking device consists of a braking steel wire rope and N braking brakes arranged in a straight-line array along the vehicle running track. The braking steel wire rope passes through the interiors of the N braking brakes, and its two ends are respectively fixed at both ends above the vehicle running track. The braking brake includes a displacement driver, a fixed brake pad, and a movable brake pad. The input end of the displacement driver is connected to the output end of the power source device. The fixed end of the displacement driver and the fixed brake pad are both fixed on the vehicle body. The driving end of the displacement driver is connected to the movable brake pad. The braking steel wire rope is arranged between the movable brake pad and the fixed brake pad, and the movable brake pad presses the braking steel wire rope against the fixed brake pad to achieve frictional braking.

[0009] The number of the described braking devices is two. The two braking devices are symmetrically installed on both sides of the vehicle body. The two braking devices are respectively connected to the output end of the power source device. The two ends of the braking steel wire rope in each braking device are respectively fixed above the ground through brackets.

[0010] A horizontal axis perpendicular to the vehicle running track is provided in the middle of the front end of the vehicle body. The upper end of the gravity block is rotatably hinged to the horizontal axis. The rear end of the traction arm is also rotatably hinged to the horizontal axis.

[0011] The upper and lower ends of the vertical rotating shaft are respectively connected to the front end of the vehicle body through mounting plates. The mounting plates are fixedly connected to the vehicle body, and the mounting plates and the vertical rotating shaft are rotatably connected through pin shafts.

[0012] The power source device is a hydraulic station. The displacement driver is a hydraulic cylinder. The hydraulic cylinder is connected to the hydraulic station through an oil circuit.

[0013] The displacement driver and the movable brake pad are connected through a damper. The damper is a spring damper.

[0014] The included angle between the axis of the articulated arm and the limit support block is 45 degrees.

[0015] The connecting rod assembly consists of cross bar A, cross bar B, vertical bar C, and a sliding pin. One end of cross bar A is movably hinged to the articulated arm through a first pin shaft, and the other end is movably hinged to cross bar B through a second pin shaft. The other end of cross bar B is fixedly connected to vertical bar C. A through groove with closed upper and lower ends is provided on vertical bar C. A sliding pin is arranged in the through groove. One end of the sliding pin is fixedly connected to the gravity block, and the other end is provided with an anti-drop limit ring integrated therewith. The first pin shaft and the second pin shaft are parallel to each other, and the second pin shaft is perpendicular to the sliding pin.

[0016] The beneficial effects of the present invention: By providing a braking device different from the disc brake and a mechanical braking trigger device on the towing vehicle, when the vehicle body slides down on a slope, automatic and timely braking can be achieved. The braking is efficient, stable, and safe, which can effectively prevent the risk of vehicle sliding down and eliminate potential safety hazards in mine production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a top view of the overall structure of the present invention.

[0018] Figure 2 This is a left view of the present invention after removing the towing arm.

[0019] Figure 3 This is a partial front view including the towing arm, the power source device and the brake trigger device.

[0020] Figure 4 This is a front view of the brake trigger device on flat ground.

[0021] Figure 5 This is a front view of the brake trigger device on a slope.

[0022] Figure 6 This is a top view of the brake trigger device.

[0023] Figure 7 This is a schematic diagram of the angular relationship between the limit support block on the vertical rotating shaft and the articulated arm.

[0024] Figure 8 This is a three-dimensional schematic diagram of the link assembly.

[0025] Figure 9 This is a schematic diagram of the structure of the brake device.

[0026] In the figure, 1 is the vehicle body, 2 is the power source device, 3 is the towing arm, 4 is the towing rope, 7 is the horizontal shaft, 21 is the position switch, 51 is the vertical rotating shaft, 52 is the limit support block, 53 is the gravity block, 54 is the link assembly, 55 is the mounting plate, 56 is the articulated arm, 61 is the brake wire rope, 62 is the brake, 541 is cross bar A, 542 is cross bar B, 543 is vertical bar C, 544 is the sliding pin, 545 is the through groove, 621 is the displacement driver, 622 is the fixed brake pad, 623 is the movable brake pad, 624 is the damper. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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 protection scope of the present invention.

[0028] As Figures 1-9As shown in the figure, an anti-falling mechanism for a mine car towed in an inclined shaft includes a brake trigger device, a power source device 2, a brake device, and a traction arm 3 installed on the vehicle body 1. The front end of the traction arm 3 is connected to a traction rope 4 of an external traction system, and the rear end is rotatably connected to the front end of the vehicle body 1. The power source device 2 has a position switch 21, and the position switch 21 is installed above the rear end of the traction arm 3. The brake trigger device is installed at the front end of the vehicle body 1. The brake trigger device includes a vertical rotating shaft 51, a limit support block 52, a hinge arm 56, a gravity block 53, and a connecting rod assembly 54. The gravity block 53 is rotatably connected to the vehicle body 1. The vertical rotating shafts 51 are symmetrically arranged on both sides of the middle of the traction arm 3. Each vertical rotating shaft 51 is provided with a limit support block 52 and a hinge arm 56. The hinge arms 56 on each vertical rotating shaft 51 are respectively connected to the gravity block 53 through the connecting rod assembly 54. When the vehicle body 1 runs horizontally, both limit support blocks 52 support the traction arm 3. When the vehicle body 1 enters the inclined track, due to the relative rotation of the gravity block 53, the gravity block 53 drives the vertical rotating shaft 51 to rotate through the connecting rod assembly 54, and rotates the two limit support blocks 52 to the outside of both sides of the traction arm 3, so that the traction arm 3 loses support. If the traction rope 4 breaks, the rear end of the traction arm 3 rises due to rotation, triggering the position switch 21 of the power source device 2. In the above structure, the power source device 2 and its position switch 21 are well-known technologies. The function of the power source device 2 is to convert other forms of energy into mechanical energy. Its switch control system has a manual reset switch. The position switch 21 of the power source device 2 is also called a travel switch and is used to start the power source device;

[0029] The described braking device consists of a braking steel wire rope 61 and N braking brakes 62 arranged in a straight-line array along the vehicle running track. The braking steel wire rope 61 passes through the interiors of the N braking brakes 62, and its two ends are respectively fixed at both ends above the vehicle running track. The braking brake 62 includes a displacement driver 621, a fixed brake pad 622, and a movable brake pad 623. The input end of the displacement driver 621 is connected to the output end of the power source device 2. The fixed end of the displacement driver 621 and the fixed brake pad 622 are both fixedly connected to the vehicle body 1. The driving end of the displacement driver 621 is connected to the movable brake pad 623. The braking steel wire rope 61 is arranged between the movable brake pad 623 and the fixed brake pad 622, and the movable brake pad 623 presses the braking steel wire rope 61 against the fixed brake pad 622 to achieve frictional braking. In the above structure, the fixed end of the displacement driver 621 and the fixed brake pad 622 can be directly fixedly installed on the vehicle body 1, or can be fixed on the vehicle body 1 through a mounting seat. In an embodiment of the present invention, the fixed end of the displacement driver 621 and the fixed brake pad 622 are fixedly connected to the vehicle body 1 through a mounting member attached to the vehicle body 1. The mounting member is a box body with a cover plate at the lower end. The cover plate is fixedly connected to the box body. A horizontal partition is provided in the box body. The fixed end of the displacement driver 621 is fixed on the upper part of the partition. A through hole is provided on the partition. The driving end of the displacement driver 621 passes through the through hole and is connected to the movable brake pad 623 at the lower end. The fixed brake pad 622 is installed on the upper surface of the cover plate.

[0030] The operating mechanism and advantages of the present invention are as follows:

[0031] 1. Existing towed mine cars are divided into load-carrying cars and passenger cars. Due to the control of the towing rope 4, load-carrying cars usually do not have anti-falling braking, while passenger cars use disc brakes for anti-falling and require manual operation. The present invention realizes the automatic anti-falling of the vehicle body, changes the braking method of the vehicle body 1, and the braking is fast and timely. The anti-falling braking of the present invention can be used for load-carrying cars and also for passenger cars, which can greatly improve the safety factor of towed mine cars.

[0032] 2. When the vehicle body 1 is running on flat ground, as Figure 3 、 Figure 4 shown, under the action of the gravity of the gravity block 53, the limit support blocks 52 on the vertical rotating shaft 51 are all located below the traction arm 3, supporting the traction arm 3 from falling and not triggering the position switch 21 of the power source device 2, and the vehicle body runs normally under traction; when the towing rope 4 pulls the vehicle body 1 into the slope track, as Figure 5As shown, an inclination angle is generated between the towing arm 3, the vehicle body 1 and the ground. The gravity block 53 needs to maintain its position under the action of gravity. Therefore, the gravity block 53 will pull the vertical rotating shaft 51 through the connecting rod assembly 54. The vertical rotating shaft 51 rotates, causing the limit support block 52 to rotate to the outside of the towing arm 3. At this time, the towing arm 3 drives the vehicle body 1 to run under the pulling force of the towing rope 4. Once the towing rope 4 breaks, the towing arm 3 has no support, its front end drops, and its rear end rises, triggering the position switch 21 of the power source device 2. The power source device starts instantly, causing the brake brakes 62 in the braking device to act simultaneously to implement braking; when the towing rope 4 is reconnected, the power source device 2 is reset through the manual reset switch, the towing rope 4 tightens the towing arm 3, and the position switch 21 resets, enabling the vehicle body 1 to resume normal operation.

[0033] In an embodiment of the present invention, the number of the braking devices is two. The two braking devices are symmetrically installed on both sides of the vehicle body. The two braking devices are respectively connected to the output ends of the power source device 2. Both ends of the braking steel wire rope 61 in each braking device are fixed above the ground through brackets. The design of the double braking steel wire rope 61 can make the braking of the vehicle body 1 more stable and safe.

[0034] In an embodiment of the present invention, a horizontal shaft 7 perpendicular to the vehicle running track is provided in the middle of the front end of the vehicle body 1. The upper end of the gravity block 53 is rotatably hinged to the horizontal shaft 7, and the rear end of the towing arm 3 is also rotatably hinged to the horizontal shaft 7. Specifically, a U-shaped mounting seat body can be provided at the front part of the vehicle body 1 to realize the installation of the horizontal shaft 7, or the horizontal shaft 7 can be fixed on both side walls of the opening groove by providing an opening groove at the front end of the vehicle body.

[0035] In an embodiment of the present invention, the upper and lower ends of the vertical rotating shaft 51 are respectively connected to the front end of the vehicle body 1 through the mounting plate 55. The mounting plate 55 is fixedly connected to the vehicle body 1, and the mounting plate 55 and the vertical rotating shaft 51 are rotatably connected through a vertical pin shaft. Specifically, a pin hole can be provided at the end of the vertical rotating shaft 51. One end of the vertical pin shaft is fixed on the mounting plate 54, and the other end is inserted into the pin hole at the end of the vertical rotating shaft 51. There is a clearance fit between the pin hole and the vertical pin shaft.

[0036] In an embodiment of the present invention, the power source device 2 is a hydraulic station, the displacement driver 621 is a hydraulic cylinder, and the hydraulic cylinder is connected to the hydraulic station through an oil circuit. Specifically, the cylinder body of the hydraulic cylinder is the fixed end, and the piston rod end is the driving end. The piston rod end is connected to the movable brake pad 623. Of course, the power source device 2 can also be of other types, such as a motor.

[0037] In an embodiment of the present invention, the displacement driver 621 and the movable brake pad 523 are connected through a damper 624, and the damper 624 is a spring damper. Specifically, the structure of the spring damper is as Figure 9As shown, it includes an upper connecting plate, a lower connecting plate and a spring arranged between the upper and lower connecting plates, the upper end of the spring is sleeved with a guide column A, the guide column A is connected to the upper connecting plate, the lower end of the spring is sleeved with a guide column B, the guide column B is connected to the lower connecting plate, the upper surface of the upper connecting plate is fixedly connected to the driving end of the displacement driver, and the lower surface of the lower connecting plate is connected to the movable gate plate 623.

[0038] In one embodiment of the present invention, the angle between the axis of the articulated arm 56 and the orthographic projection of the limit support block 52 in the horizontal plane is 45 degrees. Such an angle design can make the limit support block 52 have a larger rotation angle, ensuring that the limit support can be smoothly implemented and released.

[0039] In one embodiment of the present invention, the connecting rod assembly 54 is composed of a crossbar A541, a crossbar BB542, a vertical rod C543 and a sliding pin 544. One end of the crossbar A541 is movably hinged to the articulated arm 56 through a first pin shaft, and the other end is movably hinged to the crossbar B542 through a second pin shaft. The other end of the crossbar B542 is fixedly connected to the vertical rod C543. The vertical rod C543 is provided with a vertical through groove 545 with closed ends at the upper and lower ends. The through groove 545 is provided with a sliding pin 544. One end of the sliding pin 544 is fixedly connected to the gravity block 53, and the other end is provided with an anti-slip limit ring that is fixedly integrated. The first pin shaft and the second pin shaft are parallel to each other, and the second pin shaft is perpendicular to the sliding pin 544. Specifically, the connecting rod structure can also be in other forms. Through the connecting rod mechanism, the transmission between different components in two mutually perpendicular planes should be realized.

[0040] The parts not described in detail in this invention are prior art.

Claims

1. An anti-falling mechanism for dragging mine cars in inclined shafts, comprising a brake trigger device, a power source device (2), a brake device, and a traction arm (3) installed on a vehicle body (1). Characterized in that: The front end of the traction arm (3) is connected to a traction rope (4) of an external traction system, and the rear end is rotatably connected to the front end of the vehicle body (1). The power source device (2) has a position switch (21), and the position switch (21) is installed above the rear end of the traction arm (3). The brake trigger device is installed at the front end of the vehicle body (1). The brake trigger device includes a vertical rotating shaft (51), a limit support block (52), a hinged arm (56), a gravity block (53), and a connecting rod assembly (54). The gravity block (53) is rotatably connected to the vehicle body (1). The vertical rotating shafts (51) are symmetrically arranged on both sides of the middle of the traction arm (3). Each vertical rotating shaft (51) is provided with a limit support block (52) and a hinged arm (56). The hinged arms (56) on the two vertical rotating shafts (51) are respectively connected to the gravity block (53) through the connecting rod assembly (54). When the vehicle body (1) runs horizontally, both limit support blocks (52) support the traction arm (3). When the vehicle body (1) enters an inclined track, due to the relative rotation of the gravity block (53), the gravity block (53) drives the vertical rotating shaft (51) to rotate through the connecting rod assembly (54), and rotates the two limit support blocks (52) to the outside of both sides of the traction arm (3), so that the traction arm (3) loses support. If the traction rope (4) breaks, the rear end of the traction arm (3) rises due to rotation, triggering the position switch (21) of the power source device (2). The brake device is composed of a brake steel wire rope (61) and N brake brakes (62) arranged in a linear array along the vehicle running track. The brake steel wire rope (61) passes through the inside of the N brake brakes (62), and its two ends are respectively fixed at both ends above the vehicle running track. The brake brake (62) includes a displacement driver (621), a fixed brake pad (622), and a movable brake pad (623). The input end of the displacement driver (621) is connected to the output end of the power source device (2). The fixed end of the displacement driver (621) and the fixed brake pad (622) are both fixed on the vehicle body (1). The driving end of the displacement driver (621) is connected to the movable brake pad (623). The brake steel wire rope (61) is arranged between the movable brake pad (623) and the fixed brake pad (622), and the movable brake pad (623) presses the brake steel wire rope (61) against the fixed brake pad (622) to achieve frictional braking.

2. An anti-falling mechanism for dragging mine cars in inclined shafts according to claim 1, Characterized in that: The number of the brake devices is two. The two brake devices are symmetrically installed on both sides of the vehicle body. The two brake devices are respectively connected to the output end of the power source device (2). The two ends of the brake steel wire rope (61) in each brake device are respectively fixed above the ground through brackets.

3. An anti-falling mechanism for dragging mine cars in inclined shafts according to claim 1, Characterized in that: A horizontal axis (7) perpendicular to the vehicle running track is provided in the middle of the front end of the vehicle body (1); the upper end of the gravity block (53) is rotatably hinged to the horizontal axis (7); and the rear end of the traction arm (3) is also rotatably hinged to the horizontal axis (7).

4. The anti-falling mechanism for towing a mine car in an inclined shaft according to claim 1, Its characteristics are: The upper and lower ends of the vertical rotating shaft (51) are respectively connected to the front end of the vehicle body (1) via mounting plates (55); the mounting plate (55) is fixedly connected to the vehicle body (1); and the mounting plate (55) and the vertical rotating shaft (51) are rotationally connected via a vertical pin shaft.

5. The anti-falling mechanism for towing a mine car in an inclined shaft according to claim 1, Its characteristics are: The power source device (2) is a hydraulic station, the displacement driver (621) is a hydraulic cylinder, and the hydraulic cylinder is connected to the hydraulic station via an oil circuit.

6. The anti-falling mechanism for dragging a mine car in an inclined shaft according to claim 1, Its characteristics are: The displacement driver (621) and the movable brake piece (623) are connected via a damper (624), and the damper (624) is a spring damper.

7. The anti-falling mechanism for towing a mine car in an inclined shaft according to claim 1, Its characteristics are: The orthographic projection angle between the axis of the articulated arm (56) and the position-limiting support block (52) in the horizontal plane is 45 degrees.

8. The anti-falling mechanism for towing a mine car in an inclined shaft according to claim 1, Its characteristics are: The connecting rod assembly (54) is composed of a cross bar A (541), a cross bar B (542), a vertical bar C (543) and a sliding pin (544); one end of the cross bar A (541) is movably hinged to the hinge arm (56) through a first pin shaft, and the other end is movably hinged to one end of the cross bar B (542) through a second pin shaft; the other end of the cross bar B (542) is fixedly connected to the vertical bar C (543); a vertical through groove (545) with closed ends at the upper and lower ends is provided on the vertical bar C (543); a sliding pin (544) is provided in the through groove (545); one end of the sliding pin (544) is fixedly connected to the gravity block (53), and the other end is provided with an anti-dropping limit ring fixedly formed therein; the first pin shaft and the second pin shaft are parallel to each other, and the second pin shaft is perpendicular to the sliding pin (544).

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