A mine car roll-over prevention device

Abstract

The utility model discloses a mine car anti -rollover device, including support, support board and elevating system, the support is located at the bottom of mine car, support board is connected on the support along the height direction of mine car sliding, the fixed end of elevating system is connected on the support, the movable end of elevating system is connected on the support board, elevating system is used for driving support board elevating, to make support board and tie butt or separate, the utility model discloses beneficial effect is: through support board and transmit the lateral force to tie, and track only bears the vertical load of normal travel of mine car, and the impact of lateral force to track is avoided, and the track correction, replacement frequency is reduced, and the cost is reduced, and the security is improved.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment, specifically to a mine car anti-tipping device. Background Technology

[0002] Mining cars are special vehicles used to transport materials such as ore, coal, and slag. During the unloading process, the center of gravity of the mining car changes, making it prone to tipping over. The anti-tipping structure of the mining car can prevent the mining car from tipping over during the unloading process.

[0003] Chinese utility model patent CN220662517U discloses a mine car anti-tipping hook structure, including a mine car mechanism. The mine car mechanism has an anti-tipping mechanism on its side. The mine car mechanism includes a track, a first threaded adjusting rod, a connecting plate, and a second threaded adjusting rod. The upper part of the track is fitted with the mine car chassis. The anti-tipping mechanism includes a strip guide rail. One end of the strip guide rail is fixedly connected to the surface of the mine car chassis, and a slider is slidably connected inside the strip guide rail. The first threaded adjusting rod is threadedly connected to the slider, and one end of the first threaded adjusting rod is rotatably connected to the connecting plate. One end of the connecting plate is fixedly connected to a limit hook, which engages with the track. One end of the second threaded adjusting rod is rotatably connected to the slider, and the second threaded adjusting rod is threadedly connected to the strip guide rail.

[0004] The aforementioned technologies have the following drawbacks: when the mine car is prevented from tipping over by using a limit hook to engage with the side of the track, the tipping force of the mine car is transmitted to the side wall of the track through the hook. The track is subjected to concentrated stress, which can easily lead to track deformation. This not only increases maintenance costs but also increases the risk of safety accidents. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a mine car anti-rollover device to solve the technical problem that the rollover force is concentrated on the side wall of the track through the hook in the prior art, which easily leads to track deformation and lateral bending.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a mine car anti-tipping device, including a support, which is disposed at the bottom of the mine car; Support plate, the support plate being slidably connected to the support along the height direction of the mine car; and, A lifting mechanism, wherein the fixed end of the lifting mechanism is connected to the support, and the movable end of the lifting mechanism is connected to the support plate, and the lifting mechanism is used to drive the support plate to rise and fall so that the support plate abuts or separates from the sleeper.

[0007] In some embodiments, two support plates are provided, and the two support plates are slidably connected to both sides of the support along the height direction of the mine car, and the two support plates are respectively located on both sides of the mine car.

[0008] In some embodiments, the anti-tipping device further includes a storage mechanism, which includes a slide block and a drive assembly. Two slide blocks are slidably connected to a support along the width direction of the mine car, and two support plates are slidably connected to the two slide blocks respectively. The fixed end of the drive assembly is connected to the support, and the movable end of the drive assembly is connected to the slide block.

[0009] In some embodiments, the drive assembly includes a motor, a drive gear, a driven gear, and a double-ended lead screw. The motor is mounted on a support, the drive gear is connected to the output shaft of the motor, the double-ended lead screw is rotatably connected to the support, the double-ended lead screw extends along the width direction of the mine car, the driven gear is connected to the double-ended lead screw, the drive gear meshes with the driven gear, and both ends of the double-ended lead screw pass through two slides and are threadedly connected to the two slides.

[0010] In some embodiments, the storage mechanism further includes a protective box connected to the support, and the protective box is sleeved on the outside of the motor, the drive gear, the driven gear, and the double-ended lead screw.

[0011] In some embodiments, the lifting mechanism includes a cylinder mounted on a slide, and the piston rod of the cylinder is connected to a support plate.

[0012] In some embodiments, the anti-rollover device further includes a buffer mechanism, which includes a sleeve and a spring. The sleeve is connected to a support plate and is slidably sleeved on the piston rod of a cylinder. The spring is sleeved on the sleeve, with one end of the spring connected to the sleeve and the other end of the spring connected to the piston rod of the cylinder.

[0013] In some embodiments, the buffer mechanism further includes a controller and a pressure sensor, the pressure sensor being mounted on a support plate, and the controller being electrically connected to the cylinder and the pressure sensor.

[0014] In some embodiments, the cushioning mechanism further includes a cushioning pad connected to the bottom of the support plate.

[0015] In some embodiments, the anti-rollover device further includes a reinforcing rib, one end of which is connected to the support plate and the other end of which is connected to the sleeve.

[0016] Compared with the prior art, the beneficial effects of this utility model include: the overturning force is transferred to the sleepers through the support plate, the track only bears the vertical load of the mine car during normal travel, avoids the impact of the overturning force on the track, reduces the frequency of track correction and replacement, reduces costs, and improves safety. Attached Figure Description

[0017] Figure 1This is a first-view overall structural cross-sectional view of the anti-rollover device provided by this utility model; Figure 2 This utility model provides Figure 1 Enlarged view of the local structure at point A; Figure 3 This is a second-view overall structural cross-sectional view of the anti-rollover device provided by this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Support; 2. Mine car; 3. Support plate; 4. Lifting mechanism; 41. Cylinder; 5. Sleeper; 6. Storage mechanism; 61. Slide; 62. Drive assembly; 621. Motor; 622. Drive gear; 623. Driven gear; 624. Double-ended lead screw; 63. Protective box; 7. Buffer mechanism; 71. Sleeve; 72. Spring; 73. Controller; 74. Pressure sensor; 75. Buffer pad; 76. Reinforcing rib. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] This utility model provides a mine car anti-tipping device, the structure of which is as follows: Figure 1 - Figure 3 As shown, it includes a support 1, a support plate 3, and a lifting mechanism 4.

[0021] The support 1 is located at the bottom of the mine car 2.

[0022] The support plate 3 is slidably connected to the support 1 along the height direction of the mine car 2.

[0023] The fixed end of the lifting mechanism 4 is connected to the support 1, and the movable end of the lifting mechanism 4 is connected to the support plate 3. The lifting mechanism 4 is used to drive the support plate 3 to rise and fall so that the support plate 3 abuts or separates from the sleeper 5.

[0024] In use, the device is rigidly connected to the bottom of the mine car 2 via support 1, forming a stable whole with the mine car 2. When the mine car 2 travels to the unloading area to unload, the lifting mechanism 4 is activated, its movable end extends downward, driving the support plate 3 to move downward synchronously along the sliding guide structure of support 1; until the bottom of the support plate 3 fully abuts against the top of the sleeper 5 under the track, the lifting mechanism 4 stops and maintains a supporting state. At this time, the support plate 3 forms a rigid support point between the mine car 2 and the sleeper 5. When the mine car 2 unloads, the material shifts, causing the center of gravity to shift laterally and generating a lateral overturning moment. This lateral overturning moment is transmitted through the bottom of the mine car 2 to support 1, and then from support 1 to lifting mechanism 4. Finally, it acts directly on the sleeper 5 through support plate 3. The lateral overturning force is no longer concentrated on the side wall of the track, but is dispersed to the sleeper 5 and the foundation below through the large-area contact between support plate 3 and sleeper 5. The load-bearing stability of sleeper 5 is used to offset the lateral overturning moment and prevent the mine car 2 from tilting further. After unloading is completed, the movable end of the lifting mechanism 4 retracts upward, causing the support plate 3 to slide upward along the support 1 until the support plate 3 is completely separated from the sleeper 5 and retracted to a height that does not affect the driving of the mine car 2. The mine car 2 can then drive away from the unloading area normally.

[0025] In this invention, the lateral overturning force is transmitted to the sleeper 5 through the support plate 3, and the track only bears the vertical load of the mine car 2 during normal travel, avoiding the impact of the lateral overturning force on the track, reducing the frequency of track correction and replacement, reducing costs, and improving safety.

[0026] To improve the stability of the support, please refer to... Figure 1 In a preferred embodiment, there are two support plates 3, which are slidably connected to both sides of the support 1 along the height direction of the mine car 2, and are located on both sides of the mine car 2.

[0027] During operation, the direction of material displacement during unloading of the mine car 2 is uncertain. Traditional single-sided support plates 3 can only handle the risk of tipping over in one direction. If the material shifts to the side without support plates 3, there is still a risk of tipping over. However, the support plates 3, which are symmetrically arranged on both sides, can be driven by the lifting mechanism 4 on the corresponding side to abut against the sleeper 5 according to the actual direction of the center of gravity shift during unloading. No matter whether the mine car 2 tilts to the left or right, the tipping force can be transferred to the sleeper 5 through the support plate 3 on the same side, forming a two-way rigid support that completely covers all possible tipping directions during unloading.

[0028] To prevent support plate 3 from colliding with surrounding objects, please refer to... Figure 1In a preferred embodiment, the anti-tipping device further includes a storage mechanism 6, which includes a slide 61 and a drive assembly 62. The two slides 61 are slidably connected to the support 1 along the width direction of the mine car 2, and the two support plates 3 are slidably connected to the two slides 61 respectively. The fixed end of the drive assembly 62 is connected to the support 1, and the movable end of the drive assembly 62 is connected to the slide 61.

[0029] During normal operation of the mine car 2, there may be roadway walls, other equipment, or protruding obstacles on both sides of the track. Even when the traditional double-sided support plate 3 is retracted to its high position, its laterally extended structure may still collide with surrounding objects. The support plate 3 can be retracted within the side profile of the mine car 2, completely avoiding obstacles around the track. This prevents the support plate 3 from scraping or colliding with the roadway walls, track connectors, etc., during operation, reducing the risk of damage to the device itself and obstruction of the mine car 2's movement.

[0030] To synchronously drive the two support plates 3 to slide in opposite directions, please refer to... Figure 3 In a preferred embodiment, the drive assembly 62 includes a motor 621, a drive gear 622, a driven gear 623, and a double-ended lead screw 624. The motor 621 is mounted on the support 1. The drive gear 622 is connected to the output shaft of the motor 621. The double-ended lead screw 624 is rotatably connected to the support 1 and extends along the width direction of the mine car 2. The driven gear 623 is connected to the double-ended lead screw 624. The drive gear 622 meshes with the driven gear 623. Both ends of the double-ended lead screw 624 are respectively inserted into two slides 61 and threadedly connected to the two slides 61.

[0031] In operation, the motor 621 serves as the power source. Its output shaft rotation drives the drive gear 622, fixed at the shaft end, to rotate synchronously, converting electrical energy into mechanical rotational power. The drive gear 622 meshes with the driven gear 623 fixed at the end of the double-ended lead screw 624. The rotational motion of the drive gear 622 is transmitted to the driven gear 623 through tooth meshing, thereby driving the double-ended lead screw 624 to rotate around its own axis. The double-ended lead screw 624 is arranged along the width of the mine car 2, with its two ends having opposite thread directions, each engaging with the threaded holes of two slide blocks 61. When the double-ended lead screw 624 rotates under the drive of the driven gear 623, the left slide block 61 slides along the screw axis towards the outside or inside of the mine car 2 under the action of the left-hand thread, while the right slide block 61 slides synchronously towards the inside or outside of the mine car 2 under the action of the right-hand thread. The two slide blocks move in opposite directions with equal displacement, achieving symmetrical lateral adjustment of the two slide blocks 61. Since the two support plates 3 are slidably connected to the two slide blocks 61 respectively, the lateral sliding of the slide blocks 61 drives the support plates 3 to move synchronously, ultimately achieving the symmetrical approach or distance of the two support plates 3 along the width direction of the mine car 2, accurately connecting with the sleepers 5 at different positions or retracting them to the storage position.

[0032] To reduce the possibility of damage to the motor 621, drive gear 622, driven gear 623, and double-ended lead screw 624, please refer to... Figure 1 In a preferred embodiment, the storage mechanism 6 further includes a protective box 63, which is connected to the support 1 and is sleeved on the outside of the motor 621, the driving gear 622, the driven gear 623 and the double-ended lead screw 624.

[0033] During use, the underground transportation environment in mines contains a large amount of dust, slurry, and corrosive gases, and the humidity in the tunnels is high. If precision components such as the motor 621, gears, and double-ended lead screw 624 in the drive assembly 62 are directly exposed, dust will enter the gear meshing surface or the lead screw thread gap, leading to increased wear and affecting transmission accuracy. The protective box 63, through its fully enclosed structure, can effectively isolate dust, slurry, water vapor, and corrosive media, keeping the core components of the drive assembly 62 in a dry and clean environment.

[0034] To drive the support plate 3 to rise and fall, please refer to... Figure 1 In a preferred embodiment, the lifting mechanism 4 includes a cylinder 41, which is mounted on a slide 61, and the piston rod of the cylinder 41 is connected to the support plate 3.

[0035] In use, cylinder 41 serves as the power actuator of lifting mechanism 4. Its cylinder body is rigidly connected to slide 61 by bolts, ensuring that cylinder 41, slide 61, and support plate 3 form a stable transmission system. When the mine car 2 travels to the unloading area and the anti-rollover function needs to be activated, compressed air generates pressure in the rodless chamber, pushing the piston to move downward along the cylinder axis. The piston drives the piston rod to extend synchronously. Since the end of the piston rod is fixedly connected to the support plate 3 by bolts, the extension action of the piston rod directly drives the support plate 3 to move downward along the sliding guide structure of slide 61 until the bottom of the support plate 3 completely abuts against the top of the sleeper 5 under the track. The pressure in cylinder 41 reaches the preset value, the air circuit system stops supplying air and maintains the pressure, and the support plate 3 is stably in a supporting state, forming a rigid support point between the mine car 2 and the sleeper 5. When the mine car 2 finishes unloading and needs to resume driving, compressed air pushes the piston upward in the rod chamber, causing the piston rod to retract synchronously. The retraction of the piston rod pulls the support plate 3 upward along the sliding guide structure of the slide block 61 until the support plate 3 rises to a height that is completely separated from the sleeper 5 and does not affect the driving of the mine car 2.

[0036] To improve the stability of the support, please refer to... Figure 2In a preferred embodiment, the anti-rollover device further includes a buffer mechanism 7, which includes a sleeve 71 and a spring 72. The sleeve 71 is connected to the support plate 3 and is slidably sleeved on the piston rod of the cylinder 41. The spring 72 is sleeved on the sleeve 71, with one end of the spring 72 connected to the sleeve 71 and the other end of the spring 72 connected to the piston rod of the cylinder 41.

[0037] During operation, the lateral force caused by material deviation during the unloading process of the mine car 2 is not constant and will dynamically fluctuate with the progress of material dumping. This fluctuating load is transmitted to the piston rod of cylinder 41 through the support plate 3, which can easily cause the piston rod to be subjected to alternating impacts, affecting the service life of cylinder 41. When the lateral force increases, the reverse pressure on the support plate 3 increases, pushing the sleeve 71 to slide upward along the piston rod. The spring 72 is further compressed, absorbing the additional energy generated by the load fluctuation through elastic deformation, reducing the direct impact of the fluctuating load on the piston rod of cylinder 41. When the lateral force decreases, the spring 72 pushes the sleeve 71 downward under the action of elastic restoring force, keeping the support plate 3 in contact with the sleeper 5, preventing the support plate 3 from separating from the sleeper 5 due to a sudden decrease in lateral force, and ensuring support stability.

[0038] To dynamically adjust the support strength of support plate 3, please refer to... Figure 2 In a preferred embodiment, the buffer mechanism 7 further includes a controller 73 and a pressure sensor 74. The pressure sensor 74 is mounted on the support plate 3, and the controller 73 is electrically connected to the cylinder 41 and the pressure sensor 74.

[0039] In mining unloading scenarios, the impact intensity may change rapidly due to fluctuations in the thrust of cylinder 41, deviations in the height of sleepers 5, or dynamic fluctuations in the overturning force during unloading. Traditional purely mechanical buffers have a fixed buffering force and cannot adapt to load changes. By adding a controller 73 and a pressure sensor 74, the impact load can be sensed and dynamically adjusted in real time. The controller 73 automatically matches the buffering strategy based on the pressure data, changing the buffering force by adjusting the pressure of cylinder 41. When the impact is small, the thrust of cylinder 41 is reduced to avoid excessive compression of spring 72; when the impact is large, pressure is quickly released to relieve force, and spring 72 absorbs excess energy, ultimately keeping the pressure of support plate 3 stable within the preset safe range.

[0040] To reduce the impact force of the support plate 3 falling onto the sleeper 5, please refer to... Figure 2 In a preferred embodiment, the buffer mechanism 7 further includes a buffer pad 75, which is connected to the bottom of the support plate 3. The buffer pad 75 is made of rubber and has a thickness of 1 mm.

[0041] When in use, when the support plate 3 descends and contacts the sleeper 5, the buffer pad 75 absorbs the initial collision energy through its own compression deformation, transforming the rigid collision into a flexible contact. Combined with the buffering effect of the spring 72 and the cylinder 41, the overall impact attenuation rate is improved, further reducing the risk of collision damage between the support plate 3 and the sleeper 5.

[0042] To reduce the possibility of deformation at the connection between the support plate 3 and the sleeve 71, please refer to... Figure 2 In a preferred embodiment, the anti-rollover device further includes a reinforcing rib 76, one end of which is connected to the support plate 3, and the other end of which is connected to the sleeve 71.

[0043] In use, the connection between the support plate 3 and the sleeve 71 is the core force-bearing node of the buffer mechanism 7. When the mine car 2 is unloading, the lateral overturning force is transmitted to the sleeve 71 through the support plate 3, and then the sleeve 71 compresses the spring 72 to achieve buffering. This part is subjected to the combined action of lateral overturning force and vertical impact load for a long time, and is prone to relative deformation due to insufficient connection rigidity. The reinforcing rib 76 forms a triangular stable structure with the support plate 3 and the sleeve 71, transforming the single-point connection into a composite connection, thereby improving the bending strength of the connection part and reducing the possibility of deformation at the connection part between the support plate 3 and the sleeve 71.

[0044] To better understand this utility model, the following is combined with... Figure 1 - Figure 3 The working principle of a mine car anti-tipping device according to the present invention is described in detail below: The device is rigidly connected to the bottom of the mine car 2 through a support 1, forming a stable whole with the mine car 2. When the mine car 2 travels to the unloading area to unload material, the lifting mechanism 4 is activated, and its movable end extends downward, driving the support plate 3 to move downward synchronously along the sliding guide structure of the support 1; until the bottom of the support plate 3 completely abuts against the top of the sleeper 5 under the track, the lifting mechanism 4 stops and maintains a supporting state. At this time, the support plate 3 forms a rigid support point between the mine car 2 and the sleeper 5. When the mine car 2 unloads material, the material shifts, causing the center of gravity to shift laterally and generating a lateral tilting moment. This lateral tilting moment is transmitted through the bottom of the mine car 2 to the support 1, and then from the support 1 to the lifting mechanism 4. Finally, it acts directly on the sleeper 5 through the support plate 3. The lateral tilting force is no longer concentrated on the side wall of the track, but is dispersed to the sleeper 5 and the foundation below through the large-area contact between the support plate 3 and the sleeper 5. The load-bearing stability of the sleeper 5 is used to offset the lateral tilting moment and prevent the mine car 2 from tilting further. After unloading is completed, the movable end of the lifting mechanism 4 retracts upward, causing the support plate 3 to slide upward along the support 1 until the support plate 3 is completely separated from the sleeper 5 and retracted to a height that does not affect the driving of the mine car 2. The mine car 2 can then drive away from the unloading area normally.

[0045] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A mine car roll-over prevention device, characterized by, include: Support, wherein the support is located at the bottom of the mine car; A support plate, which is slidably connected to a support along the height direction of the mine car; as well as, A lifting mechanism, wherein the fixed end of the lifting mechanism is connected to the support, and the movable end of the lifting mechanism is connected to the support plate, and the lifting mechanism is used to drive the support plate to rise and fall so that the support plate abuts or separates from the sleeper.

2. The mine car roll-over prevention device of claim 1, wherein, The support plate is provided in two parts, and the two support plates are slidably connected to both sides of the support along the height direction of the mine car. The two support plates are located on both sides of the mine car.

3. The mine car anti-tipping device according to claim 2, characterized in that, The anti-tipping device also includes a storage mechanism, which includes a slide block and a drive assembly. The two slide blocks are slidably connected to the support along the width direction of the mine car. The two support plates are slidably connected to the two slide blocks respectively. The fixed end of the drive assembly is connected to the support, and the movable end of the drive assembly is connected to the slide block.

4. The mine car anti-tipping device according to claim 3, characterized in that, The drive assembly includes a motor, a drive gear, a driven gear, and a double-ended lead screw. The motor is mounted on a support, the drive gear is connected to the output shaft of the motor, the double-ended lead screw is rotatably connected to the support, the double-ended lead screw extends along the width direction of the mine car, the driven gear is connected to the double-ended lead screw, the drive gear meshes with the driven gear, and both ends of the double-ended lead screw pass through two slide blocks and are threadedly connected to the two slide blocks.

5. The mine car anti-tipping device according to claim 4, characterized in that, The storage mechanism also includes a protective box, which is connected to the support and is fitted over the motor, drive gear, driven gear and double-ended lead screw.

6. The mine car anti-tipping device according to claim 3, characterized in that, The lifting mechanism includes a cylinder, which is mounted on a slide, and the piston rod of the cylinder is connected to a support plate.

7. The mine car anti-tipping device according to claim 6, characterized in that, The anti-rollover device also includes a buffer mechanism, which includes a sleeve and a spring. The sleeve is connected to the support plate and is slidably sleeved on the piston rod of the cylinder. The spring is sleeved on the sleeve, with one end of the spring connected to the sleeve and the other end of the spring connected to the piston rod of the cylinder.

8. The mine car anti-tipping device according to claim 7, characterized in that, The buffer mechanism also includes a controller and a pressure sensor. The pressure sensor is mounted on the support plate, and the controller is electrically connected to the cylinder and the pressure sensor.

9. The mine car anti-tipping device according to claim 7, characterized in that, The buffer mechanism also includes a buffer pad, which is connected to the bottom of the support plate.

10. The mine car anti-tipping device according to claim 7, characterized in that, The anti-rollover device also includes a reinforcing rib, one end of which is connected to the support plate and the other end of which is connected to the sleeve.

Images