A mine trolley anti-stall device

Abstract

The present invention relates to the technical field of mine trolleys, and discloses a mine trolley anti-stall device, comprising a trolley bottom plate, a bucket provided on the upper surface of the trolley bottom plate, two wheel axles movably mounted on the lower surface of the trolley bottom plate, the two wheel axles comprising a front axle and a rear axle, a drive sprocket fixedly sleeved on the outer side of the rear axle, and two inverted L-shaped rods fixedly mounted on one side of the bucket at corresponding positions of the drive sprocket. The mine trolley anti-stall device is provided with a driven wheel, a pressure block, an extension block, a push block, an outer driven wheel, a trapezoidal push block and an inverted triangular block. When the outer side of the outer driven wheel contacts the clockwise rotating reduction wheel, when the next pressure block contacts the extension block, the above process is repeated to achieve the effect of braking, thereby achieving the effect of automatically slowing down the vehicle when the vehicle speed is too fast, and avoiding the problem of vehicle body instability caused by sudden and large deceleration through braking.

Description

Technical Field

[0001] The invention relates to the technical field of mine trolleys, in particular to an anti-stall device for a mine trolley. Background Art

[0002] Mineral mining refers to the process of extracting ore from blocks in underground deposits. It is achieved through four steps: ore deposit development, ore block mining, cutting and recovery. There are many types of underground mining methods. The commonly used methods are based on ground pressure management methods and are divided into three categories: natural support mining, artificial support mining and caving mining. Mineral mining requires excavation of mine tunnels and the installation of mine trolleys in the mine tunnels to transport mining personnel and minerals.

[0003] The existing mine trolleys still have certain problems when in use. For example, when the mine trolley encounters a downhill slope during its travel, the speed of the trolley will automatically increase due to gravity, but the existing mine trolley cannot automatically decelerate when the speed increases, and the current brake structure cannot achieve the effect of point braking. Direct braking causes the vehicle speed to drop suddenly and drastically, which can easily cause the vehicle speed to be unstable. In addition, the contact point between the brake structure and the wheel structure of the existing mine trolley is single and fixed. Long-term friction will cause the brake structure to wear. The friction will cause the temperature of the brake structure to rise, resulting in a decrease in friction and a decrease in braking performance, which has caused serious safety hazards. Summary of the Invention

[0004] The present invention provides an anti-stall device for a mine trolley, which has the beneficial effects of automatically decelerating, braking and adjusting the contact position between the brake structure and the wheel structure when the speed increases, solving the problems mentioned in the above background technology of the inability to automatically decelerate and the degradation of braking performance caused by excessive temperature of the brake structure.

[0005] The present invention provides the following technical solution: an anti-stall device for a mine trolley, comprising a trolley bottom plate, the upper surface of the trolley bottom plate is provided with a bucket, and the lower surface of the trolley bottom plate is movably mounted with two wheel axles, the two wheel axles including a front axle and a rear axle, characterized in that: the outer side of the rear axle is fixedly sleeved with a driving sprocket, one side of the bucket and fixedly mounted with two inverted L-shaped rods at corresponding positions of the driving sprocket, a transmission shaft movably mounted between the two inverted L-shaped rods, the outer side of the transmission shaft is fixedly sleeved with a driven sprocket, the driven sprocket and the driving sprocket are connected by a chain belt transmission, the outer side of one end of the transmission shaft is fixedly sleeved with a fixed sleeve shaft, the outer side of the fixed sleeve shaft is fixedly mounted with a driven wheel, a plurality of leakage grooves are opened on the outer side of each leakage groove, a pressure block is provided on the inner side of each leakage groove, a movable column is provided on the side of the pressure block close to the fixed sleeve shaft, one end of the movable column extends to the inner side of the driven wheel and is fixedly mounted with a pressure plate, and the pressure plate is arranged to prevent the pressure block from Completely separated from the driven wheel, a pushing block is provided on one side of the bucket and at the corresponding position of the driven wheel, an extension block is fixedly installed on the side of the pushing block close to the driven wheel, a connecting cylinder is fixedly installed on the lower surface of the pushing block, an inverted triangular block is fixedly installed on the bottom end of the connecting cylinder, a trapezoidal pushing block is provided on one side of the trolley bottom plate and on both sides of the inverted triangular block, the trapezoidal pushing block is used to push the inverted triangular block to move up and reset, a Z-shaped rod is provided on the lower surface of the inverted triangular block, and one side of the Z-shaped rod is fixedly installed The end extends to the top of the rear axle and is fixedly installed with a U-shaped block, a fixed shaft is fixedly installed on the inner side of the U-shaped block, an inner fixed wheel is fixedly sleeved on the outer side of the fixed shaft, an outer driven wheel is movably connected to the outer side of the inner fixed wheel, a tightening column is movably connected to the outer side of the inner fixed wheel and between the outer driven wheel and the inner fixed wheel, the inner side wall of the outer driven wheel is stepped, the tightening column is used to limit the rotation direction of the outer driven wheel, a friction rod is provided on the bottom plate of the trolley, and the position of the friction rod corresponds to the position of the outer driven wheel.

[0006] As an optional solution to the anti-stall device of the mine trolley described in the present invention, the inner diameter of the driven wheel is larger than the outer diameter of the fixed sleeve shaft, and a plurality of inner rods are provided on the inner side of the driven wheel. All of the inner rods are fixedly connected to the outer side of the fixed sleeve shaft at one end away from the driven wheel, and a return spring is movably sleeved on the outer side of the movable column and between the pressure plate and the inner side wall of the driven wheel, and one side of the pressure block is an arc surface.

[0007] As an optional solution to the anti-stall device of the mine trolley described in the present invention, two L-shaped fixing plates are fixedly installed on one side of the vehicle bucket and at the corresponding positions of the driven wheels. The pushing block is movably clamped between the two L-shaped fixing plates, and the installation position of the extension block corresponds to the position of the pressure block.

[0008] As an optional solution for the anti-stall device of the mine trolley described in the present invention, a through groove is provided on one side of the two L-shaped fixing plates, and a side shell is fixedly installed on the side away from each other of the two L-shaped fixing plates, and the two trapezoidal push blocks are movably clamped on the inner sides of the two through grooves, and the two trapezoidal push blocks are fixedly installed on the side away from the inverted triangle blocks, and side tubes are respectively provided on one side of the two side shells at the corresponding positions of the two resistance rods, and one end of the two resistance rods is movably sleeved on the inner side of the side tube, and the inner side of the two side tubes is provided with a resistance spring.

[0009] As an optional solution to the anti-stall device of the mine trolley of the present invention, the inverted triangular block is an inverted trapezoid, the trapezoidal push block is a right-angled trapezoid, and the two inclined surfaces of the inverted triangular block are respectively fitted with the inclined surfaces of the two trapezoidal push blocks.

[0010] As an optional solution to the anti-stall device of the mine trolley described in the present invention, two connecting rods are fixedly installed on both sides of the outer driven wheel, and circular grooves are provided on both sides of the inner fixed wheel. An embedded cylinder is fixedly installed on the end of the connecting rod away from the outer driven wheel, and the embedded cylinder is movably clamped in the inner side of the circular groove. The embedded cylinder is cylindrical, and the column diameter of the embedded cylinder is adapted to the width of the circular groove.

[0011] As an optional solution to the anti-stall device of the mine trolley described in the present invention, a circular hole is provided on the outer side of the inner fixed wheel, the tightening column is movably sleeved on the inner side of the circular hole, a top spring is provided on the inner side of the circular hole and below the tightening column, a reduction wheel is fixedly sleeved on the outer side of the rear axle and at the corresponding position of the outer driven wheel, and anti-slip protrusions are provided on the outer side of the reduction wheel and the outer side of the outer driven wheel.

[0012] The present invention has the following beneficial effects:

[0013] 1. The anti-stall device of the mine trolley is equipped with a driven wheel, a pressure block, an extension block, a push block, an outer driven wheel, a trapezoidal push block and an inverted triangle block. When the vehicle speed is too high, the return spring will be compressed shorter, the pressure block will detach from the inner side of the leakage groove, and the arc surface of the pressure block will squeeze the extension block, so that the push block moves downward between the two L-shaped fixed plates, thereby driving the connecting cylinder to move downward, and the connecting cylinder drives the inverted triangle block to move downward. The inverted triangle block can drive the U-shaped block to move downward through the Z-shaped rod, and the downward movement of the U-shaped block can drive the outer driven wheel to move downward. When the outer side of the outer driven wheel contacts the clockwise rotating reduction wheel, friction will be generated between the reduction wheel and the reduction wheel, thereby reducing the rotation speed of the rear axle to achieve deceleration. The effect is that when the outer driven wheel contacts the reduction wheel, the outer driven wheel is blocked and cannot descend anymore, so that the arc surface of the pressure block will continue to press the extension block, and the extension block will exert a reaction force on the pressure block, causing the pressure block to move toward the inside of the leakage groove until the retracted pressure block is completely separated from the extension block, and the downward pressure of the pressure block on the extension block disappears. The two trapezoidal push blocks squeeze the inverted triangle block, causing the inverted triangle block to move upward, thereby causing the connecting cylinder, the outer driven wheel and the push block to move upward, causing the push block and the extension block to reset. When the next pressure block contacts the extension block, the above process will be repeated to achieve the effect of braking, thereby achieving the effect of automatic deceleration when the vehicle speed is too fast, and avoiding the problem of vehicle body instability caused by sudden and drastic deceleration through braking.

[0014] 2. The anti-stall device of the mine trolley is provided with a top spring, a tightening column, an outer moving wheel, an inner fixed wheel and a friction rod. When the outer moving wheel moves up and down, it will contact the friction rod. When it moves down, the friction rod gives the outer moving wheel a counterclockwise rotation force, and when it moves up, the friction rod gives the outer moving wheel a clockwise rotation force. Under the action of the top spring, the end of the tightening column away from the inner fixed wheel presses against the inner side of the outer moving wheel. When the outer moving wheel rotates counterclockwise, one end of the tightening column presses against the step inside the outer moving wheel, so that the outer moving wheel The driven wheel cannot rotate counterclockwise. When the outer driven wheel rotates clockwise, the end of the tightening column that presses against the inner side of the outer driven wheel will move along the inner step of the outer driven wheel. The outer driven wheel rotates clockwise by a certain angle, thereby changing the position of the outer driven wheel facing the reduction wheel. When the outer driven wheel contacts the reduction wheel again, the contact position is different from the last contact position, so that the contact position of the outer driven wheel and the reduction wheel is different each time the brake is applied, avoiding the problem of the brake structure causing excessive temperature to be too high due to long-term friction and affecting the braking performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a cross-sectional view of the overall structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the rear axle structure of the present invention.

[0018] Figure 4 It is a schematic diagram of the outer driving wheel and inner fixing structure of the present invention.

[0019] Figure 5 For the present invention Figure 1 Enlarged view of point A in the middle.

[0020] Figure 6 For the present invention Figure 1 Enlarged view of point B in the middle.

[0021] Figure 7 For the present invention Figure 2 Enlarged view of point C in the middle.

[0022] Figure 8 For the present invention Figure 2 Enlarged view of point D in the middle.

[0023] Figure 9 For the present invention Figure 3 Enlarged view of point E in the middle.

[0024] In the figure: 1. Trolley bottom plate; 2. Traveling wheels; 3. Wheel axles; 4. Cargo box; 5. Inverted L-shaped rod; 6. Driven wheel; 8. L-shaped fixing plate; 9. Extension block; 10. Z-shaped rod; 11. Pushing block; 12. U-shaped block; 13. Speed ​​reducer; 14. Driving sprocket; 15. Internal fixed wheel; 16. Circular groove; 17. Connecting rod; 18. Inner cylinder; 19. External driven wheel; 20. Transmission shaft; 21. Driven sprocket; 22. Chain belt; 23. Pressure block; 25. Fixed sleeve shaft; 26. Return spring; 27. Movable column; 28. Leakage groove; 29. ​​Pressure plate; 30. Tightening column; 31. Top spring; 32. Fixed shaft; 33. Friction rod; 34. Round hole; 35. Connecting cylinder; 36. Inverted triangle block; 37. Trapezoidal push block; 38. Resistance rod; 39. Resistance spring; 40. Side tube; 41. Side shell. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1

[0027] See also Figure 1-9A mine trolley anti-stall device comprises a trolley bottom plate 1, a bucket 4 is provided on the upper surface of the trolley bottom plate 1, two wheel axles 3 are movably mounted on the lower surface of the trolley bottom plate 1, the two wheel axles 3 include a front axle and a rear axle, a driving sprocket 14 is fixedly sleeved on the outer side of the rear axle, two inverted L-shaped rods 5 are fixedly mounted on one side of the bucket 4 and at the corresponding positions of the driving sprocket 14, a transmission shaft 20 is movably mounted between the two inverted L-shaped rods 5, a driven sprocket 21 is fixedly sleeved on the outer side of the transmission shaft 20, and the driven sprocket 21 and the driving sprocket are fixedly sleeved. 14 are connected by a chain belt 22, one end of the transmission shaft 20 is fixedly sleeved with a fixed sleeve shaft 25, and the outer side of the fixed sleeve shaft 25 is fixedly installed with a driven wheel 6, and a plurality of leakage grooves 28 are opened on the outer side of the driven wheel 6. A pressure block 23 is provided on the inner side of each leakage groove 28, and a movable column 27 is provided on the side of the pressure block 23 close to the fixed sleeve shaft 25. One end of the movable column 27 extends to the inner side of the driven wheel 6 and is fixedly installed with a pressure plate 29. The setting of the pressure plate 29 is used to prevent the pressure block 23 from completely separating from the driven wheel 6. A pushing block 11 is provided on one side and at the corresponding position of the driven wheel 6. An extension block 9 is fixedly installed on the side of the pushing block 11 close to the driven wheel 6. A connecting cylinder 35 is fixedly installed on the lower surface of the pushing block 11. An inverted triangular block 36 is fixedly installed on the bottom end of the connecting cylinder 35. A trapezoidal pushing block 37 is provided on one side of the trolley bottom plate 1 and on both sides of the inverted triangular block 36. The trapezoidal pushing block 37 is provided for pushing the inverted triangular block 36 to move up and reset. A Z-shaped rod 10 is provided on the lower surface of the inverted triangular block 36. One end of the Z-shaped rod 10 extends to the rear axle. A U-shaped block 12 is fixedly installed above, a fixed shaft 32 is fixedly installed on the inner side of the U-shaped block 12, an inner fixed wheel 15 is fixedly sleeved on the outer side of the fixed shaft 32, an outer side of the inner fixed wheel 15 is movably connected to an outer moving wheel 19, a tightening column 30 is movably connected to the outer side of the inner fixed wheel 15 and between the outer moving wheel 19 and the inner fixed wheel 15, the inner side wall of the outer moving wheel 19 is stepped, and the tightening column 30 is used to limit the rotation direction of the outer moving wheel 19, and a friction rod 33 is provided on the bottom plate 1 of the trolley, and the position of the friction rod 33 corresponds to the position of the outer moving wheel 19.

[0028] In a specific embodiment of the present invention, both ends of the wheel shaft 3 are provided with running wheels 2 for supporting the vehicle to travel. When the running wheels 2 rotate clockwise, the wheel shaft 3 also rotates clockwise, and the driving sprocket 14 on the rear axle rotates clockwise following the rear axle. Through the chain belt 22, the driving sprocket 14 can drive the driven sprocket 21 to rotate clockwise, and the driven sprocket 21 can drive the transmission shaft 20 to rotate clockwise, and the transmission shaft 20 can drive the fixed sleeve shaft 25 to rotate clockwise, and the fixed sleeve shaft 25 drives the driven wheel 6 to rotate clockwise. During the clockwise rotation of the driven wheel 6, the pressure block 2 3 will generate centrifugal force, and the pressure block 23 will apply a force to the movable column 27 away from the fixed sleeve shaft 25. The pressure block 23 will break away from the inner side of the leakage groove 28. The arc surface of the pressure block 23 will squeeze the extension block 9 and press the extension block 9 downward, so that the push block 11 moves downward between the two L-shaped fixed plates 8, thereby driving the connecting cylinder 35 to move downward, and the connecting cylinder 35 drives the inverted triangle block 36 to move downward. The inverted triangle block 36 can drive the U-shaped block 12 to move downward through the Z-shaped rod 10. The downward movement of the U-shaped block 12 can drive the outer moving wheel 19 to move downward. When the outer moving wheel 19 When the outer side of the outer wheel 19 contacts the reduction wheel 13 rotating clockwise, friction is generated between the reduction wheel 13, thereby reducing the rotation speed of the rear axle and achieving the deceleration effect. When the outer driven wheel 19 contacts the reduction wheel 13, the outer driven wheel 19 is blocked and cannot fall anymore, so that the arc surface of the pressure block 23 continues to press the extension block 9, and the extension block 9 causes a reaction force on the pressure block 23, causing the pressure block 23 to move toward the inside of the leakage groove 28 until the retracted pressure block 23 completely separates from the extension block 9, and the downward pressure of the pressure block 23 on the extension block 9 disappears, and the two trapezoidal push blocks 37 squeeze the inverted triangle block 3 6, so that the inverted triangle block 36 moves upward, thereby causing the connecting cylinder 35, the outer wheel 19 and the pushing block 11 to move upward, so that the pushing block 11 and the extension block 9 are reset. When the next pressure block 23 contacts the extension block 9, the above process will be repeated to achieve the effect of braking. The tightening column 30 can limit the rotation direction of the outer wheel 19, so that the outer wheel 19 can only rotate clockwise and cannot rotate counterclockwise. When the outer wheel 19 moves up and down, it will contact the friction rod 33, so that the outer wheel 19 rotates clockwise when moving upward to adjust the contact position between the outer wheel 19 and the rear axle.

[0029] Example 2

[0030] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 7 The inner diameter of the driven wheel 6 is larger than the outer diameter of the fixed sleeve shaft 25. Several inner rods are provided on the inner side of the driven wheel 6. The ends of all the inner rods away from the driven wheel 6 are fixedly connected to the outer side of the fixed sleeve shaft 25. A return spring 26 is movably sleeved on the outer side of the movable column 27 and between the pressure plate 29 and the inner side wall of the driven wheel 6. One side of the pressure block 23 is an arc surface.

[0031] In this embodiment: when the vehicle speed is slow, the rotation speed of the rear axle is slow, the rotation speed of the driven wheel 6 is also slow, and the centrifugal force of the pressure block 23 is also small. The elastic force of the return spring 26 can control the length of the pressure block 23 extending from the inner side of the leakage groove 28. When the vehicle speed is too high, the return spring 26 will be compressed shorter, and the pressure block 23 will be detached from the inner side of the leakage groove 28. The arc surface of the pressure block 23 can be squeezed to the extension block 9.

[0032] Example 3

[0033] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 3 Two L-shaped fixing plates 8 are fixedly installed on one side of the truck bed 4 and at the corresponding positions of the driven wheel 6. The pushing block 11 is movably connected between the two L-shaped fixing plates 8. The installation position of the extension block 9 corresponds to the position of the pressure block 23.

[0034] In this embodiment: the L-shaped fixing plate 8 is set to limit the moving direction of the pushing block 11. The cross-sections of the two L-shaped fixing plates 8 are both L-shaped. When the pressure block 23 pressurizes the extension block 9, the pushing block 11 can only move downward between the two L-shaped fixing plates 8, thereby achieving the effect of limiting the pushing block 11.

[0035] Example 4

[0036] This embodiment is an improvement on embodiment 3. For details, please refer to Figure 2 and Figure 9 A through groove is provided on one side of the two L-shaped fixing plates 8, and a side shell 41 is fixedly installed on the side of the two L-shaped fixing plates 8 away from each other. The two trapezoidal push blocks 37 are respectively movably connected to the inner sides of the two through grooves, and the two trapezoidal push blocks 37 are respectively fixedly installed with resistance rods 38 on the side away from the inverted triangle blocks 36. Side tubes 40 are respectively provided on one side of the two side shells 41 at the corresponding positions of the two resistance rods 38, and one end of the two resistance rods 38 is respectively movably sleeved on the inner side of the side tube 40, and resistance springs 39 are provided on the inner sides of the two side tubes 40.

[0037] In this embodiment: when the connecting cylinder 35 drives the inverted triangular block 36 to move downward, the inverted triangular block 36 will squeeze the trapezoidal push blocks 37 on both sides during the downward movement. The two trapezoidal push blocks 37 move toward the inside of the side shell 41 and squeeze the resistance spring 39. The retracted pressure block 23 is completely separated from the extension block 9, and the downward pressure of the pressure block 23 on the extension block 9 disappears. Under the action of the two resistance springs 39, the two trapezoidal push blocks 37 squeeze the inverted triangular block 36, causing the inverted triangular block 36 to move upward, thereby causing the connecting cylinder 35, the outer moving wheel 19 and the push block 11 to move upward, causing the push block 11 and the extension block 9 to reset.

[0038] Example 5

[0039] This embodiment is an improvement on embodiment 4. For details, please refer to Figure 9 The inverted triangular block 36 is an inverted trapezoid, the trapezoidal push block 37 is a right-angled trapezoid, and the two inclined surfaces of the inverted triangular block 36 are respectively fitted with the inclined surfaces of the two trapezoidal push blocks 37.

[0040] In this embodiment: by setting the trapezoidal push block 37 as a right-angled trapezoid and the inverted trapezoidal block 36 as an inverted trapezoid, when the inverted triangular block 36 moves downward, a force can be given to the trapezoidal push block 37 in the direction of the side shell 41, and the two trapezoidal push blocks 37 slowly move away from the inverted triangular block 36, so that the inverted triangular block 36 can continue to descend. When the downward force of the inverted triangular block 36 disappears, the two trapezoidal push blocks 37 can pressurize the inverted triangular block 36 under the action of the resistance spring 39, so that the inverted triangular block 36 is subjected to an upward force, thereby driving the push block 11 and the extension block 9 to reset.

[0041] Example 6

[0042] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 4 Two connecting rods 17 are fixedly installed on both sides of the outer driving wheel 19, and annular grooves 16 are opened on both sides of the inner fixed wheel 15. An embedded cylinder 18 is fixedly installed on the end of the connecting rod 17 away from the outer driving wheel 19. The embedded cylinder 18 is movably clamped in the inner side of the annular groove 16. The embedded cylinder 18 is cylindrical, and the column diameter of the embedded cylinder 18 is adapted to the width of the annular groove 16.

[0043] In this embodiment, the angle between the two connecting rods 17 on the same side of the outer moving wheel 19 and the annular groove 16 is 180 degrees. When the outer moving wheel 19 rotates clockwise, the connecting rod 17 on the outer moving wheel 19 rotates around the center of the inner fixed wheel 15, so that the two embedded cylinders 18 can rotate inside the two annular grooves 16, so that the inner diameter of the outer moving wheel 19 can be larger than the outer diameter of the inner fixed wheel 15, and the inner fixed wheel 15 and the outer moving wheel 19 can still be movably connected together.

[0044] Example 7

[0045] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 4 and Figure 6 A circular hole 34 is provided on the outer side of the inner fixed wheel 15, and the tightening column 30 is movably sleeved on the inner side of the circular hole 34. A top spring 31 is provided on the inner side of the circular hole 34 and below the tightening column 30. The reduction wheel 13 is fixedly sleeved on the outer side of the rear axle and at the corresponding position of the outer driven wheel 19. The outer sides of the reduction wheel 13 and the outer sides of the outer driven wheel 19 are both provided with anti-slip protrusions.

[0046] In this embodiment: under the action of the top spring 31, the end of the tightening column 30 away from the inner fixed wheel 15 presses the inner side of the outer moving wheel 19. When the outer moving wheel 19 rotates counterclockwise, one end of the tightening column 30 presses against the step inside the outer moving wheel 19, so that the outer moving wheel 19 cannot rotate counterclockwise. When the outer moving wheel 19 rotates clockwise, the end of the tightening column 30 pressing against the inner side of the outer moving wheel 19 will move along the inner step of the outer moving wheel 19, and the outer moving wheel 19 rotates clockwise by a certain angle, thereby changing the position of the outer moving wheel 19 facing the reduction wheel 13. When the outer moving wheel 19 contacts the reduction wheel 13 again, the contact position is different from the last contact position.

[0047] Working principle: When the present invention is used, as the trolley moves forward, the traveling wheel 2 rotates clockwise, the wheel shaft 3 also rotates clockwise, the driving sprocket 14 on the rear axle rotates clockwise following the rear axle, and the driving sprocket 14 can drive the driven sprocket 21 to rotate clockwise through the chain belt 22, and the driven sprocket 21 can drive the transmission shaft 20 to rotate clockwise through the transmission shaft 20, and the fixed sleeve shaft 25 can drive the driven wheel 6 to rotate clockwise. When the driven wheel 6 rotates clockwise, the fixed sleeve shaft 25 can drive the driven wheel 6 to rotate clockwise. During the process, the pressure block 23 will generate centrifugal force, and the pressure block 23 will apply a force to the movable column 27 in the direction away from the fixed sleeve shaft 25. When the vehicle speed is slow, the rotation speed of the rear axle is slow, the rotation speed of the driven wheel 6 is also slow, and the centrifugal force of the pressure block 23 is also small. The elastic force of the return spring 26 can control the length of the pressure block 23 extending from the inner side of the leakage groove 28. When the vehicle speed is too high, the return spring 26 will be compressed shorter, and the pressure block 23 will detach from the inner side of the leakage groove 28, and the arc surface of the pressure block 23 will be squeezed to the extension block 9.

[0048] The pressure block 23 presses the extension block 9 downward, causing the push block 11 to move downward between the two L-shaped fixing plates 8, thereby driving the connecting cylinder 35 to move downward, and the connecting cylinder 35 drives the inverted triangle block 36 to move downward. During the downward movement of the inverted triangle block 36, the trapezoidal push blocks 37 on both sides are squeezed. The two trapezoidal push blocks 37 move toward the inside of the side shell 41 and squeeze the resistance spring 39. The inverted triangle block 36 can drive the U-shaped block 12 to move downward through the Z-shaped rod 10. The downward movement of the U-shaped block 12 can drive the outer moving wheel 19 to move downward. When the outer side of the outer moving wheel 19 contacts the clockwise rotating reduction wheel 13, friction will be generated between the reduction wheel 13, thereby reducing the rotation speed of the rear axle to achieve the deceleration effect. When the outer moving wheel 19 contacts the reduction wheel 13, the outer moving wheel 19 is blocked and cannot descend anymore. , so that the arc surface of the pressure block 23 will continue to press the extension block 9, and the extension block 9 will cause a reaction force on the pressure block 23, so that the pressure block 23 moves toward the inside of the leakage groove 28 until the retracted pressure block 23 is completely separated from the extension block 9, and the downward pressure of the pressure block 23 on the extension block 9 disappears. Under the action of the two resistance springs 39, the two trapezoidal push blocks 37 squeeze the inverted triangle block 36, so that the inverted triangle block 36 moves upward, thereby making the connecting cylinder 35, the outer driving wheel 19 and the pushing block 11 all move upward, so that the pushing block 11 and the extension block 9 are reset. When the next pressure block 23 contacts the extension block 9, the above process will be repeated to achieve the effect of braking, so that the car has the effect of automatic deceleration when the speed is too fast, and the braking deceleration also avoids the problem of instability of the car body caused by sudden and large deceleration of the car.

[0049] When the outer moving wheel 19 and the inner fixed wheel 15 move downward, the right side of the outer moving wheel 19 contacts one side of the friction rod 33. Under the action of the top spring 31, the end of the tightening column 30 away from the inner fixed wheel 15 presses the inner side of the outer moving wheel 19. When the outer moving wheel 19 rotates counterclockwise, one end of the tightening column 30 presses against the step inside the outer moving wheel 19, making it impossible for the outer moving wheel 19 to rotate counterclockwise. When the outer moving wheel 19 contacts the reduction wheel 13, the clockwise rotating reduction wheel 13 exerts a counterclockwise force on the outer moving wheel 19, and the outer moving wheel 19 cannot rotate counterclockwise, thereby increasing the friction between the reduction wheel 13 and the outer moving wheel 19. When the outer wheel 19 starts to rebound and move upward, the right side of the outer wheel 19 contacts the friction rod 33. The friction between the friction rod 33 and the outer wheel 19 causes the outer wheel 19 to rotate clockwise. When the outer wheel 19 rotates clockwise, the end of the tightening column 30 that presses against the inner side of the outer wheel 19 will move along the inner step of the outer wheel 19. The outer wheel 19 rotates clockwise by a certain angle, thereby changing the position of the outer wheel 19 facing the reduction wheel 13. When the outer wheel 19 contacts the reduction wheel 13 again, the contact position is different from the last contact position, thereby avoiding the problem of increased temperature of the brake structure and decreased friction due to a single brake position.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A mine trolley anti-stall device, comprising a trolley bottom plate (1), a bucket (4) provided on the upper surface of the trolley bottom plate (1), two wheel axles (3) movably mounted on the lower surface of the trolley bottom plate (1), the two wheel axles (3) comprising a front axle and a rear axle, characterized in that: The outer side of the rear axle is fixedly sleeved with a driving sprocket (14); two inverted L-shaped rods (5) are fixedly installed on one side of the bucket (4) and at positions corresponding to the driving sprocket (14); a transmission shaft (20) is movably installed between the two inverted L-shaped rods (5); a driven sprocket (21) is fixedly sleeved on the outer side of the transmission shaft (20); the driven sprocket (21) and the driving sprocket (14) are connected to each other through a chain belt (22); a fixed sleeve (25) is fixedly sleeved on the outer side of one end of the transmission shaft (20); a driven wheel (6) is fixedly installed on the outer side of the fixed sleeve (25); The outer side of the driven wheel (6) is provided with a plurality of leakage grooves (28), and a pressure block (23) is provided on the inner side of each leakage groove (28). A movable column (27) is provided on the side of the pressure block (23) close to the fixed sleeve (25). One end of the movable column (27) extends to the inner side of the driven wheel (6) and is fixedly installed with a pressure plate (29). The pressure plate (29) is provided to prevent the pressure block (23) from completely separating from the driven wheel (6). A push block (11) is provided on one side of the bucket (4) and at a corresponding position of the driven wheel (6). The push block (11) is close to the side of the driven wheel (6). An extension block (9) is fixedly installed, a connecting cylinder (35) is fixedly installed on the lower surface of the pushing block (11), an inverted triangle block (36) is fixedly installed on the bottom end of the connecting cylinder (35), a trapezoidal pushing block (37) is provided on one side of the trolley bottom plate (1) and on both sides of the inverted triangle block (36), the trapezoidal pushing block (37) is used to push the inverted triangle block (36) to move upward and reset, a Z-shaped rod (10) is provided on the lower surface of the inverted triangle block (36), one end of the Z-shaped rod (10) extends to the top of the rear axle and is fixedly installed with a U-shaped block (12), the U-shaped block (12) A fixed shaft (32) is fixedly installed on the inner side of the fixed shaft (32), an inner fixed wheel (15) is fixedly sleeved on the outer side of the fixed shaft (32), an outer moving wheel (19) is movably connected to the outer side of the inner fixed wheel (15), a tightening column (30) is movably connected to the outer side of the inner fixed wheel (15) and between the outer moving wheel (19) and the inner fixed wheel (15), the inner side wall of the outer moving wheel (19) is stepped, and the tightening column (30) is used to limit the rotation direction of the outer moving wheel (19), and a friction rod (33) is provided on the bottom plate (1) of the trolley, and the position of the friction rod (33) corresponds to the position of the outer moving wheel (19).

2. The anti-stall device for a mine trolley according to claim 1, characterized in that: The inner diameter of the driven wheel (6) is larger than the outer diameter of the fixed sleeve (25), and a plurality of inner rods are provided on the inner side of the driven wheel (6). The ends of all the inner rods away from the driven wheel (6) are fixedly connected to the outer side of the fixed sleeve (25). A return spring (26) is movably sleeved on the outer side of the movable column (27) and between the pressure plate (29) and the inner side wall of the driven wheel (6). One side of the pressure block (23) is an arc surface.

3. The anti-stall device for a mine trolley according to claim 1, characterized in that: Two L-shaped fixing plates (8) are fixedly installed on one side of the truck bucket (4) and at corresponding positions of the driven wheel (6). The pushing block (11) is movably connected between the two L-shaped fixing plates (8). The installation position of the extension block (9) corresponds to the position of the pressure block (23).

4. The anti-stall device for a mine trolley according to claim 3, characterized in that: A through groove is provided on one side of the two L-shaped fixing plates (8), and a side shell (41) is fixedly installed on the side of the two L-shaped fixing plates (8) away from each other. The two trapezoidal push blocks (37) are respectively movably connected to the inner sides of the two through grooves. A resistance rod (38) is fixedly installed on the side of the two trapezoidal push blocks (37) away from the inverted triangle block (36). A side tube (40) is provided on one side of the two side shells (41) at the corresponding position of the two resistance rods (38), and one end of the two resistance rods (38) is respectively movably sleeved on the inner side of the side tube (40), and a resistance spring (39) is provided on the inner side of the two side tubes (40).

5. The anti-stall device for a mine trolley according to claim 4, characterized in that: The inverted triangular block (36) is an inverted trapezoid, the trapezoidal push block (37) is a right-angled trapezoid, and the two inclined surfaces of the inverted triangular block (36) are respectively fitted with the inclined surfaces of the two trapezoidal push blocks (37).

6. The anti-stall device for a mine trolley according to claim 1, characterized in that: Two connecting rods (17) are fixedly installed on both sides of the outer moving wheel (19), and an annular groove (16) is opened on both sides of the inner fixed wheel (15). An embedded cylinder (18) is fixedly installed on one end of the connecting rod (17) away from the outer moving wheel (19), and the embedded cylinder (18) is movably engaged with the inner side of the annular groove (16). The embedded cylinder (18) is cylindrical, and the column diameter of the embedded cylinder (18) is adapted to the width of the annular groove (16).

7. The anti-stall device for a mine trolley according to claim 1, characterized in that: A circular hole (34) is provided on the outer side of the inner fixed wheel (15), the tightening column (30) is movably sleeved on the inner side of the circular hole (34), a top spring (31) is provided on the inner side of the circular hole (34) and below the tightening column (30), a reduction wheel (13) is fixedly sleeved on the outer side of the rear axle and at a corresponding position of the outer driven wheel (19), and anti-slip protrusions are provided on the outer side of the reduction wheel (13) and the outer side of the outer driven wheel (19).

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