A mine car active brake mechanism and brake method

Abstract

The application discloses a mine car active brake mechanism and a brake method, and belongs to the technical field of mine car brake mechanisms. The mine car active brake mechanism frame is installed on a track. A brake mechanism is installed at the bottom of the frame and cooperates with a toothed plate between the brake mechanism and two tracks to lock the stalled mine car on the track. The brake mechanism comprises an active clamping plate and a driven clamping plate. A limiting plate is arranged at the bottom of the active clamping plate and is used for locking the active clamping plate. The two clamping plates in the device are driven and cooperated through a gear set, so that the two clamping plates share a set of unlocking mechanism, thereby simplifying the overall structure of the bottom of the mine car. When the two clamping plates are unlocked, the clamping plate in the front direction and close to the front can be automatically selected to be clamped with the toothed plate through the arrangement of the gear set, thereby avoiding the overturning of the mine car and enabling the mine car to be smoothly stopped on the track.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine car brake mechanism, and particularly relates to a mine car active brake mechanism and a brake method. BACKGROUND

[0002] The mine car active brake mechanism is a safety protection device installed on a mine transport mine car (such as an underground track mine car, an open-pit mine dump truck, etc.), which can actively monitor dangerous working conditions and automatically trigger braking. The core function is to make up for the hysteresis of the traditional passive brake (such as foot brake and hand brake), and to avoid or reduce the risk of collision, rollover and sliding of the mine car in a complex operating environment.

[0003] At present, most of the bottom of the mine car is configured with a clamping plate, which is matched with the tooth plate arranged between the two tracks to lock the mine car on the track. However, in actual use, if a single clamping plate is arranged, the clamping plate is difficult to stably cooperate with the tooth plate when the mine car climbs in different directions. If two sets of clamping plates are arranged, multiple sets of locking mechanisms and corresponding unlocking mechanisms need to be configured, which leads to redundant structure of the bottom of the vehicle frame and is not conducive to operation.

[0004] Therefore, it is necessary to provide a mine car active brake mechanism and a brake method to solve the above technical problems. SUMMARY

[0005] The present application aims to provide a mine car active brake mechanism and a brake method to solve the problem that the existing mine car is locked on the track by a single clamping plate matched with the tooth plate arranged between the two tracks, which makes it difficult for the clamping plate to stably cooperate with the tooth plate when the mine car climbs in different directions.

[0006] Based on the above idea, the present application provides the following technical scheme: a mine car active brake mechanism, comprising:

[0007] A vehicle frame is installed on a track;

[0008] A brake mechanism is installed at the bottom of the vehicle frame and cooperates with the tooth plate between the two tracks to lock the stalled mine car on the track. The brake mechanism comprises an active clamping plate and a driven clamping plate. A limiting plate is arranged at the bottom of the active clamping plate, which is used to lock the active clamping plate.

[0009] A gear set is used to transmissionally connect the active clamping plate and the driven clamping plate.

[0010] The clutch mechanism is configured to drive the driven clamping plate to deflect downward at different speeds when the limiting plate is unlocked from the driving clamping plate, so that the driven clamping plate can be engaged with the toothed plate earlier or later than the driving clamping plate.

[0011] As a further scheme of the present application, the vehicle frame bottom is provided with wheels matched with the track, and a swing lever fixed on the wheels is matched with the limiting plate through an unlocking mechanism. When the mine car loses speed, the wheel speed increases, so that the unlocking mechanism can pull the limiting plate to deflect to disengage the limiting plate from the driving clamping plate.

[0012] As a further scheme of the present application, the limiting plate is provided with a pin shaft penetrating through the limiting plate and being rotatably matched with the limiting plate. The unlocking mechanism includes a slide rod, and a pull plate is hinged between the slide rod and the limiting plate. The swing lever can contact the slide rod and drive the slide rod to move along the running direction of the vehicle frame during rotation of the swing lever.

[0013] As a further scheme of the present application, the gear set includes a large gear and a small gear. The driving clamping plate is provided with a rotating shaft at one end close to the driven clamping plate. The large gear and the small gear located on both sides of the driving clamping plate are fixedly sleeved on the outer side of the rotating shaft. The large gear and the small gear located on both sides of the driven clamping plate are rotatably matched with the driven clamping plate. The small gear is engaged with the large gear. The clutch mechanism is configured to alternately lock the large gear, the small gear and the driven clamping plate.

[0014] As a further scheme of the present application, the clutch mechanism includes a slide column. The outer circumferential surface of the slide column is outwardly protruded to form a key bar. Key grooves are formed in the inner wall of the large gear, the inner wall of the small gear and the driven clamping plate. The key bar is slidably arranged in the key grooves.

[0015] As a further scheme of the present application, the vehicle frame is slidably provided with a pressing plate. Both ends of the pressing plate are downwardly extended to form mutually parallel pressing surfaces. The pressing surfaces are obliquely arranged relative to the length direction of the vehicle frame. Both ends of the slide column are attached to the inner side of the pressing surfaces.

[0016] As a further scheme of the present application, both ends of the rotating shaft are sleeved with connecting plates. The end of the rotating shaft is extended into a stepped hole in the side surface of the connecting plate and is rotatably matched with the connecting plate.

[0017] As a further scheme of the present application, an elastic member is arranged between the rotating shaft and the connecting plate to elastically connect the rotating shaft and the connecting plate in the circumferential direction.

[0018] As a further scheme of the present application: the top surface of the toothed plate is uniformly provided with multiple groups of tooth grooves, and the end of the driving clamping plate and the driven clamping plate away from each other extends downward to form an inverted hook matched with the tooth groove.

[0019] A brake method using the above mine car driving brake mechanism, comprising the following steps: when the mine car loses speed on the track, the wheel speed is accelerated, the limiting plate is deflected and disengaged from the driving clamping plate through the cooperation of the swing rod and the sliding rod; the driving clamping plate is deflected downward, and the driven clamping plate is deflected downward at the same time through the gear set; the driven clamping plate is selectively clamped with the pinion or the large gear through the clutch mechanism, so that the driven clamping plate can be clamped with the toothed plate before or after the driving clamping plate, so that the mine car is locked on the track.

[0020] Compared with the prior art, the present application has the following advantages: the two clamping plates in the device are driven and matched through the gear set, so that the two clamping plates share a set of unlocking mechanism, thereby simplifying the brake mechanism at the bottom of the mine car, and when the two clamping plates are unlocked, through the arrangement of the gear set, the clamping plate in the front and forward direction can be automatically selected and clamped with the toothed plate, thereby avoiding the overturning of the mine car, and enabling the mine car to be smoothly stopped on the track. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further described below in combination with the drawings and embodiments:

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a schematic diagram of the overall structure of the present application;

[0024] Figure 3 is a schematic diagram of the position of the driving clamping plate and the driven clamping plate of the present application;

[0025] Figure 4 is a schematic diagram of the pressing plate structure of the present application;

[0026] Figure 5 is a schematic diagram of the cooperation of the unlocking mechanism and the limiting plate of the present application;

[0027] Figure 6 is a schematic diagram of the cooperation of the guide column and the pressing plate of the present application;

[0028] Figure 7 is a schematic diagram of the gear set structure of the present application;

[0029] Figure 8 is a schematic diagram of the clutch mechanism structure of the present application;

[0030] Figure 9 is a schematic diagram of the key groove structure of the present application;

[0031] Figure 10 is the pivot mounting schematic diagram of the application.

[0032] In the figure: 1, frame; 2, track; 3, toothed plate; 4, driving clamping plate; 5, driven clamping plate; 6, guide column; 7, pressing plate; 701, extrusion surface; 8, support plate; 9, limiting plate; 10, pull plate; 11, sliding rod; 1101, sliding block; 12, pin shaft; 13, swing lever; 14, connecting piece; 15, sliding column; 16, pivot; 17, large gear; 18, small gear; 19, key bar; 20, key groove; 21, elastic member; 22, barb. DETAILED DESCRIPTION

[0033] As Figures 1-10 shown, a mine car driving brake mechanism, including a mine car sliding on a track 2, specifically, the mine car mainly includes a frame 1, a running wheel installed at the bottom of the frame 1 and matched with the track 2, and a car hopper installed at the top of the frame 1, in actual use, the mine car can run on the track 2 through a power mechanism arranged on itself or through an external traction member to provide power for the mine car running on the track 2, in the present application, the latter provides power for the mine car running on the track 2, that is, a plurality of mine cars are connected in sequence through hooks, and a winch is arranged at both ends of the track 2, a traction member (such as a steel wire rope) on the winch is connected with the hooks on the mine cars, thereby driving a plurality of mine cars to run along the track 2.

[0034] When the mine car is uphill or downhill, the situation of unhooking or traction member breaking occurs, the mine car will "slip", thereby easily causing an accident, based on this, a brake mechanism is generally arranged at the bottom of the mine car, and a toothed plate 3 matched with the brake mechanism is arranged between the two tracks 2, when the mine car loses speed due to "slip", the brake mechanism will be released and clamped with the toothed plate 3, thereby locking the mine car on the track 2, and the present application will be described in detail in combination with the brake mechanism at the bottom of the mine car.

[0035] The brake mechanism includes a pair of clamping plates symmetrically distributed at the bottom of the frame 1, for the convenience of description, the pair of clamping plates are respectively marked as driving clamping plate 4 and driven clamping plate 5, in combination Figures 2-5As shown, the active card plate 4 and the driven card plate 5 are in transmission cooperation through the gear set, so that the active card plate 4 and the driven card plate 5 can be symmetrically deflected in the vertical plane where the center line of the frame 1 is located; and the bottom of the active card plate 4 is provided with a limiting plate 9, which can keep the active card plate 4 in the initial state; since the active card plate 4 and the driven card plate 5 are engaged through the gear set, the driven card plate 5 can also keep the initial static state; and the swing lever 13 fixed on the inner side of the wheel is in cooperation with the limiting plate 9 through the unlocking mechanism; when the mine car loses speed, the wheel speed increases, so that the unlocking mechanism can pull the limiting plate 9 to deflect to make the limiting plate 9 deviate from the active card plate 4; at this time, the active card plate 4 and the driven card plate 5 will deflect downward, and the gear set is configured to control the card plate in the front direction and close to the front to be firstly engaged with the tooth plate 3 between the two tracks 2 when the mine car climbs in different directions, so as to stop the mine car on the track 2, and avoid the mine car from turning over; as described above, the two card plates in the device are in transmission cooperation through the gear set, so that the two card plates share a set of unlocking mechanisms, thereby simplifying the overall structure of the bottom of the mine car; and when the two card plates are unlocked, the gear set can automatically select the card plate in the front direction and close to the front to be engaged with the tooth plate 3, thereby avoiding the mine car from turning over, and enabling the mine car to be smoothly stopped on the track 2.

[0036] The limiting plate 9 is provided with a pin shaft 12, the pin shaft 12 passes through the limiting plate 9 and is in rotary cooperation with the limiting plate 9 through a bearing, and the pin shaft 12 is arranged on the outer side of the active card plate 4; the unlocking mechanism includes a sliding rod 11, the sliding rod 11 can slide along the length direction of the mine car, and the sliding rod 11 is hinged with a pull plate 10 between the limiting plate 9; the swing lever 13 is fixedly arranged at the position on the inner side of the wheel and cooperates with the sliding rod 11; the swing lever 13 can contact the sliding rod 11 and drive the sliding rod 11 to move along the running direction of the frame 1 in the process of rotating with the wheel; through the structure, when the mine car is pulled to run at a predetermined speed, the swing lever 13 cannot promote the limiting plate 9 to deviate from the active card plate 4 when the swing lever 13 pushes the sliding rod 11 to move to the limit position; when the mine car "slides down" and loses speed, the swing lever 13 rotates at a higher speed, and in the process of the swing lever 13 hitting the sliding rod 11, the sliding rod 11 can move a long distance, so that the limiting plate 9 is deflected by the pull plate 10 to deviate from the active card plate 4; at this time, the active card plate 4 and the driven card plate 5 can deflect downward at the same time.

[0037] The gear set includes a large gear 17 and a small gear 18 respectively installed on both sides of the chuck plate. It should be noted that a rotating shaft 16 is provided at one end of the active chuck plate 4 near the driven chuck plate 5. The rotating shaft 16 passes through the active chuck plate 4 and is fixedly connected to it. The large gear 17 and the small gear 18 located on both sides of the active chuck plate 4 are fixedly sleeved on the outside of the rotating shaft 16. The large gear 17 and the small gear 18 located on both sides of the driven chuck plate 5 are rotatably engaged with the driven chuck plate 5.

[0038] Furthermore, a clutch mechanism is provided at the end axis of the driven plate 5, and the large gear 17 and small gear 18 located on the driven plate 5 are movably sleeved on the outside of the clutch mechanism. The clutch mechanism is configured to achieve alternating locking of the large gear 17 and small gear 18 with the driven plate 5. Specifically, the clutch mechanism includes a slide column 15, and a key bar 19 is formed by the outward protrusion of the outer circumference of the slide column 15. The key bar 19 is arranged along the axial direction of the slide column 15 and can move synchronously with the slide column 15. The end of the driven plate 5 has a sliding opening for the slide column to slide. The column 15 passes through a through hole, and keyways 20 are provided on the inner walls of the large gear 17, the small gear 18, and the through hole. The key bar 19 slides in the keyway 20. With this structure, when the key bar 19 is embedded in the keyway 20 on the large gear 17 or the small gear 18, the large gear 17 or the small gear 18 can be locked to the driven plate 5. It should be noted that the small gear 18 on the active plate 4 meshes with the large gear 17 on the driven plate 5, and the large gear 17 on the active plate 4 meshes with the small gear 18 on the driven plate 5.

[0039] Combination Figures 3-5 As shown, in order to drive the sliding column 15 to slide, this design slidably mounts a pressure plate 7 on the frame 1. The pressure plate 7 can move along the length direction of the frame 1, and both ends of the pressure plate 7 extend downward to form mutually parallel pressing surfaces 701. The pressing surfaces 701 are arranged at an angle relative to the length direction of the frame 1, and both ends of the sliding column 15 are attached to the inner side of the pressing surfaces 701. Figures 2-6 As shown, when the mine car travels along Figure 2 When the mine car is going uphill in the indicated direction, the pressure plate 7 slides against the direction of travel relative to the frame 1, thereby pushing the sliding column 15, so that the key bar 19 engages with the keyway 20 on the large gear 17, thus locking the driven plate 5 with the large gear 17 on one side. At this time, when the mine car "slips downhill" and loses speed, the impact of the swing arm 13 on the sliding rod 11 can cause the limiting plate 9 to be misaligned with the active plate 4, causing the active plate 4 to deflect downward. The active plate 4, through the engagement of the small gear 18 on one side with the large gear 17 on the driven plate 5, can also cause the driven plate 5 to deflect downward at the same time. Since the diameter of the small gear 18 is smaller than the diameter of the large gear 17, this causes the active plate 4 to contact the toothed plate 3 first and engage with the toothed plate 3 before the driven plate 5. Figure 2It can be seen that when the active clamping plate 4 and the toothed plate 3 are clamped first, the mine car is locked on the track 2, and the position of the active clamping plate 4 and the toothed plate 3 is locked is located Figure 2 The left side of the mine car, so as to avoid the situation of overturning of the mine car; similarly, when the mine car climbs uphill in the opposite direction as shown, the pressing plate 7 slides in the opposite direction relative to the frame 1, in this case, the pressing plate 7 can extrude the slide column 15 so that the key bar 19 is inserted into the key groove 20 on the pinion 18, so that the driven clamping plate 5 is locked with the pinion 18, when the active clamping plate 4 is unlocked and deflected downward, through the engagement of the large gear 17 on the active clamping plate 4 and the pinion 18 on the driven clamping plate 5, the driven clamping plate 5 can be deflected downward at a faster speed and clamped with the toothed plate 3 first, from which it can be seen that when the driven clamping plate 5 is clamped first with the toothed plate 3, the mine car can be locked on the track 2 and the situation of overturning can be avoided. Figure 3 Figure 3

[0040] In summary, through the cooperation of the pressing plate 7 and the clutch mechanism, the driven clamping plate 5 can be automatically selected to be locked with the pinion 18 or the large gear 17 during the uphill process of the mine car in different directions, so that the clamping plate on the advancing side of the mine car is always clamped with the toothed plate 3, thereby maintaining the stability of the mine car and avoiding the situation of overturning, and the entire brake mechanism and unlocking mechanism are arranged at the bottom of the mine car, thereby not affecting the connection of multiple mine cars and the operation of the mine car.

[0041] Of course, in addition to the above unlocking by the cooperation of the swing rod 13 and the slide rod 11, an acceleration sensor can also be arranged on the mine car, and an electric cylinder is installed on the frame 1, the extension end of the electric cylinder is hinged with the pull plate 10, and the acceleration sensor and the electric cylinder are connected through a controller (such as PLC or single-chip microcomputer), when the mine car loses speed, the acceleration sensor can control the electric cylinder to pull the pull plate 10 to unlock.

[0042] As shown in Figures 1-5 The toothed plate 3 is arranged at the uphill of the track 2, and the top surface of the toothed plate 3 is uniformly provided with a plurality of tooth grooves 301, and the ends of the active clamping plate 4 and the driven clamping plate 5 away from each other are downwardly extended to form barbs 22, through the clamping cooperation of the barbs 22 and the tooth grooves 301, the mine car can be locked on the track 2, and the barbs 22 on the clamping plate are near the side edge of the frame 1, through this arrangement, the clamping position of the clamping plate and the toothed plate 3 is far away from the center of the frame 1 as much as possible, thereby further avoiding the overturning of the mine car.

[0043] As shown in Figure 4 The guide column 6 is fixedly arranged on the base of the frame 1, and the top of the pressing plate 7 is fixedly provided with a guide strip, the guide column 6 passes through the guide strip and slides with it, and a limiting spring is arranged between the guide strip and the base. ​​

[0044] The limiting plate 9 is provided with support plates 8 at its top and bottom, so that the limiting plate 9 is sandwiched between the two support plates 8, thereby providing stable support for the limiting plate 9. The two support plates 8 are fixedly connected at their four corners by brackets, which are fixed to the frame 1. The top of the sliding rod 11 is rotatably connected to a slider 1101. A sliding frame is fixedly installed on the frame 1 by a support bracket. The slider 1101 slides in the sliding frame, and the guide rod fixed in the sliding frame passes through the slider 1101 and slides with it. It should be noted that springs are provided on both sides of the slider 1101, and the springs are located between the slider 1101 and the inner end face of the sliding frame. Through this structure, the limiting plate 9 can remain perpendicular to the active clamping plate 4 when the sliding rod 11 is not under force, thereby providing stable support for the active clamping plate 4. Of course, ball bearings can be installed on the limiting plate 9 to reduce the friction between it and the active clamping plate 4.

[0045] from Figure 5 As can be seen, the slide rod 11 passes through the pull plate 10 and rotates with it, while the pin fixed at the end of the pull plate 10 passes through the limiting plate 9 and rotates with the limiting plate 9. The pin shaft 12 passes through the support plate 8 and rotates with the support plate 8 through the bearing. During the process of the pull plate 10 pulling the limiting plate 9, the limiting plate 9 rotates around the pin shaft 12.

[0046] The driven plate 5 has an annular groove at its end, and an annular connector 14 is fitted at the annular groove. The driven plate 5 and the connector 14 are rotatably engaged, and the driven plate 5 can rotate around the axis of the connector 14. The connector 14 is fixed to the bottom of the frame 1.

[0047] In actual use, both the large gear 17 and the small gear 18 can be rotated and engaged with the driven plate 5 through bearings. Alternatively, an annular groove can be opened on the side of the driven plate 5, and the ends of the large gear 17 and the small gear 18 can be fixedly provided with convex rings that rotate and engage with the annular grooves. The cross-sections of the convex rings and the annular grooves are both T-shaped structures.

[0048] Reference Figure 10 As shown, both ends of the rotating shaft 16 are fitted with connecting plates, which are fixedly engaged with the frame 1. The end of the rotating shaft 16 extends into the stepped hole on the side of the connecting plate and rotates with the connecting plate. An elastic element 21 is provided between the rotating shaft 16 and the connecting plate to achieve elastic connection between the rotating shaft 16 and the connecting plate in its circumferential direction. Specifically, the elastic element 21 can be a coil spring or a torsion spring, and both ends of the elastic element 21 are respectively connected to the outer wall of the rotating shaft 16 and the inner wall of the stepped hole.

[0049] The above-disclosed examples are merely preferred embodiments of this application, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of this application. Therefore, equivalent variations made within the scope of this application are still within the scope of this application.

Claims

1. A mine car active braking mechanism, characterized in that, include: A frame (1) is mounted on a track (2); A braking mechanism is installed at the bottom of the frame (1) and the braking mechanism cooperates with the toothed plate (3) between the two rails (2) to lock the stalled mine car on the rail (2). The braking mechanism includes an active locking plate (4) and a driven locking plate (5). A limit plate (9) is provided at the bottom of the active locking plate (4). The limit plate (9) is used to lock the active locking plate (4). A gear set is used to drive the active plate (4) and the driven plate (5); The clutch mechanism is configured such that when the limiting plate (9) releases the lock on the active plate (4), the active plate (4) can drive the driven plate (5) to deflect downward at different speeds during the transmission connection between the active plate (4) and the driven plate (5) through the gear set, so that the driven plate (5) can engage with the gear plate (3) first or later than the active plate (4).

2. The active braking mechanism for a mining car according to claim 1, characterized in that: The bottom of the frame (1) is equipped with wheels that cooperate with the track (2). The swing rod (13) fixed on the wheel cooperates with the limiting plate (9) through an unlocking mechanism. When the mine car loses speed, the speed of the wheel increases, so that the unlocking mechanism can pull the limiting plate (9) to deflect so that the limiting plate (9) is misaligned with the active locking plate (4).

3. The active braking mechanism for a mining car according to claim 2, characterized in that: The limiting plate (9) is provided with a pin (12), which passes through the limiting plate (9) and rotates with it. The unlocking mechanism includes a slide rod (11), and a pull plate (10) is hinged between the slide rod (11) and the limiting plate (9). The swing rod (13) can contact the slide rod (11) and drive the slide rod (11) to move along the travel direction of the frame (1) during the rotation of the wheel.

4. The active braking mechanism for a mining car according to claim 3, characterized in that: The gear set includes a large gear (17) and a small gear (18). The active plate (4) is provided with a rotating shaft (16) at one end near the driven plate (5). The large gear (17) and small gear (18) located on both sides of the active plate (4) are fixedly sleeved on the outside of the rotating shaft (16). The large gear (17) and small gear (18) located on both sides of the driven plate (5) are rotatably engaged with the driven plate (5), and the small gear (18) meshes with the large gear (17). The clutch mechanism is configured to achieve alternating locking of the large gear (17) and the small gear (18) with the driven plate (5).

5. The active braking mechanism for a mining car according to claim 4, characterized in that: The clutch mechanism includes a slide column (15), the outer circumference of which protrudes outward to form a key bar (19). Keyways (20) are provided on the inner wall of the large gear (17), the inner wall of the small gear (18), and the driven plate (5). The key bar (19) slides in the keyway (20).

6. The active braking mechanism for a mining car according to claim 5, characterized in that: A pressure plate (7) is slidably mounted on the frame (1). Both ends of the pressure plate (7) extend downward to form mutually parallel extrusion surfaces (701). The extrusion surfaces (701) are arranged at an angle relative to the length direction of the frame (1). Both ends of the sliding column (15) are attached to the inner side of the extrusion surfaces (701).

7. The active braking mechanism for a mining car according to claim 4, characterized in that: Both ends of the rotating shaft (16) are fitted with connecting plates, and the end of the rotating shaft (16) extends into the stepped hole on the side of the connecting plate and rotates with the connecting plate.

8. The active braking mechanism for a mining car according to claim 7, characterized in that: An elastic element (21) is provided between the rotating shaft (16) and the connecting plate to achieve elastic connection between the rotating shaft (16) and the connecting plate in its circumferential direction.

9. The active braking mechanism for a mining car according to claim 1, characterized in that: The top surface of the toothed plate (3) is uniformly provided with multiple sets of tooth grooves (301), and the opposite ends of the active clamping plate (4) and the driven clamping plate (5) extend downward to form barbs (22) that cooperate with the tooth grooves (301).

10. A braking method using the active braking mechanism of a mine car as described in any one of claims 4-6, characterized in that, The process includes the following steps: when the mine car loses speed on the track (2), the wheel speed increases, and the limit plate (9) is deflected and offset from the active plate (4) by the cooperation of the swing rod (13) and the slide rod (11); during the downward deflection of the active plate (4), the driven plate (5) can be driven to deflect downward by the gear set at the same time; the driven plate (5) is selectively engaged with the small gear (18) or the large gear (17) by the clutch mechanism, so that the driven plate (5) can be engaged with the toothed plate (3) before or after the active plate (4), so that the mine car is locked on the track (2).

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