Rack rail vehicle for coal mine tunnel conveying

Abstract

The invention discloses a rack rail vehicle for coal mine roadway conveying, and relates to the technical field of coal transportation, the rack rail vehicle comprises a conveying rail, a rack is fixedly connected to the conveying rail, a conveying trolley is in sliding fit with the conveying rail, and an emergency protection mechanism is installed at the advancing end of the conveying trolley and used for protecting the conveying trolley when the rack is sunken. The emergency protection mechanism comprises a mounting plate fixedly mounted on the conveying trolley. Through the arrangement of the emergency protection mechanism, when the derailment phenomenon occurs, the clamping teeth are matched with the triggering assembly, so that the clamping teeth rapidly approach the rack and are inserted into tooth seams of the rack, and therefore the conveying trolley is braked in time, the speed is prevented from being increased when the trolley continues to retreat, and the safety of the conveying trolley is improved. Therefore, huge impact caused by retreating of the trolley is effectively avoided, the probability of accidents is reduced, the safety of the bottom gear and the rack of the conveying trolley after separation is improved, and the safety of conveying work of the conveying trolley is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal transportation, in particular to a rack railway car for coal mine roadway transportation. BACKGROUND

[0002] The rack railway car for coal mine roadway transportation is a kind of transportation equipment for transporting coal mine, which is different from ordinary railway relying on the friction force between wheels and rails. The rack railway car drives and brakes through the meshing of gears and racks in the track, so as to overcome the steep slope that ordinary locomotives cannot reach.

[0003] When the rack railway car transports coal mine, the gear is installed at the bottom of the rack railway car body. The locomotive power system drives the gear to rotate. The gear "bites" the rack rail, pushes the vehicle forward, and transmits power through the meshing of the gear and the rack, so as to complete the climbing of the steep slope.

[0004] Although the above-mentioned rack railway car can better complete the transportation of coal, in actual work, due to the destruction of the original stress balance state of the rock mass by the tunneling operation, the rock mass will produce a certain degree of displacement and damage, and is always in a dynamic change process. At the same time, due to the instability of coal geology, the rack rail will sink and appear concave. When the trolley passes, the meshing effect between the gear and the rack rail may be poor. If the brake cannot be applied in time, the acceleration generated by the backward movement of the trolley may cause other accidents, affecting the safety of coal transportation. SUMMARY

[0005] Therefore, the present application provides a rack railway car for coal mine roadway transportation to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a rack railway car for coal mine roadway transportation, comprising a conveying track, a rack is fixedly connected to the conveying track, a conveying trolley is slidingly connected to the conveying track, an emergency protection mechanism is installed at the front end of the conveying trolley for protecting the conveying trolley when the rack appears concave, the emergency protection mechanism comprises a mounting plate fixedly installed on the conveying trolley, at least two sliding columns are slidingly connected to the top of the mounting plate, and the sliding columns penetrate through the top of the mounting plate, clamping teeth are fixedly connected to the bottom of the sliding columns, a limiting clamping rod is slidingly connected to the mounting plate, and the limiting clamping rod penetrates through the mounting plate, the end of the limiting clamping rod close to the clamping teeth is clamped with the clamping teeth, the emergency protection mechanism comprises a trigger assembly, when the trigger assembly is triggered, the limiting clamping rod slides away from the clamping teeth and limits the clamping of the clamping teeth, and after the limiting clamping rod is disengaged from the limiting of the clamping teeth, the clamping teeth move towards the rack.

[0007] Preferably, the trigger assembly comprises at least two supporting blocks, each of which is fixedly connected with the mounting plate, the supporting blocks are directly rotationally connected with rotating shafts, the rotating shafts are fixedly connected with rollers at both ends, the rollers abut against the conveying track, two of the supporting blocks are rotationally connected with connecting rings at one side close to each other, the connecting rings are fixedly connected with a protective wheel between them, the protective wheel is provided with pawls at both ends, the rotating shafts are fixedly connected with two ratchets on the outer surfaces, and the ratchets are engaged with the pawls.

[0008] Preferably, the ratchets and the pawls are located inside the connecting rings.

[0009] Preferably, the protective wheel is fixedly connected with a plurality of convex strips on the outer surface, and each of the convex strips is triangular.

[0010] Preferably, the trigger assembly further comprises a spring, the spring is sleeved on the outer surface of the sliding column, and the spring is fixedly connected with the mounting plate and the clamping tooth at both ends, so as to improve the moving speed of the clamping tooth to the rack.

[0011] Preferably, the clamping tooth is provided in the form of a tooth.

[0012] Preferably, the outer surface of the roller is provided in the form of a concave-convex rubber material.

[0013] Preferably, the emergency protection mechanism further comprises an auxiliary assembly, the auxiliary assembly is used for preventing the sliding column from resetting, the auxiliary assembly comprises a fixed rod, the fixed rod is fixedly connected with the outer surface of the sliding column, penetrates through the mounting plate, and is fixedly connected with a plurality of limiting blocks on the side away from the sliding column.

[0014] Preferably, the mounting plate is fixedly connected with a mounting block at the top, the mounting block is rotationally connected with a stop block on the side close to the limiting block, the shaft end of the stop block is sleeved with a torsional spring, the torsional spring is fixedly connected with the mounting block and the stop block at both ends, the mounting block is fixedly connected with a limiting sheet on the side close to the limiting block, and the limiting sheet is located above the stop block, so as to limit the rotating direction of the stop block.

[0015] Preferably, the side close to the limiting block of the stop block is obliquely arranged upwards.

[0016] Compared with the prior art, the present application provides a rack car for conveying in a coal mine tunnel, which has the following beneficial effects:

[0017] 1、The present application sets up the emergency protection mechanism, when the derailment phenomenon appears, through the cooperation of the clamping tooth and the trigger assembly, the clamping tooth is close to the rack direction and inserts into the rack gap, thereby timely braking the conveying trolley, preventing the speed from accelerating when the trolley continues to retreat, thereby effectively avoiding the huge impact generated by the trolley due to retreat, reducing the probability of accidents, improving the safety of the conveying trolley bottom gear and rack after separation, and ensuring the safety of the conveying trolley conveying work.

[0018] 2、The present application sets up the auxiliary assembly, when the fixed rod and the limiting block slide upward, the limiting block cannot push the stop block to rotate upward under the cooperation with the limiting piece, so that the fixed rod and the sliding column cannot rotate upward, thereby effectively enhancing the clamping effect of the clamping tooth and the rack, avoiding the rebound phenomenon of the clamping tooth after clamping with the rack, improving the effect of clamping tooth limiting, and further improving the safety of the emergency protection mechanism for the conveying trolley.

[0019] 3、The present application sets up the trigger assembly, so that the conveying trolley works normally, the rotating shaft and the roller contact the conveying track, assisting the guidance of the conveying trolley, improving the stability of the conveying trolley, and using the forward and reverse rotation of the roller to drive the clamping tooth to move, saving the use of electric power resources, not relying on the use of electricity, thereby being applicable to complex geological environment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective view of the present application;

[0021] Figure 2 is a partial perspective view of the present application; Figure 1

[0022] Figure 3 is a partial sectional view of the mounting plate of the present application;

[0023] Figure 4 is a structure diagram of the emergency protection mechanism of the present application;

[0024] Figure 5 is a partial exploded structure diagram of the rotating shaft of the present application;

[0025] Figure 6 is a top perspective view of the mounting plate of the present application;

[0026] Figure 7 is an enlarged structure diagram of A in the present application; Figure 6

[0027] In the figure:

[0028] 100, conveying track; 101, rack; 102, conveying trolley; ​​

[0029] 200, emergency protection mechanism; 201, mounting plate; 202, sliding column; 203, clamping tooth; 204, limiting clamping rod; 205, supporting block; 206, rotating shaft; 207, roller; 208, connecting ring; 209, protection wheel; 210, ratchet wheel; 211, pawl; 212, protruding strip; 213, spring;

[0030] 221, fixing rod; 222, limiting block; 223, mounting block; 224, stop block; 225, torsional spring; 226, limiting sheet. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that discussions of these implementations are merely provided to enable those skilled in the art to better understand so as to be able to implement the subject matter described herein, and variations of elements discussed can be made by one skilled in the art, without departing from the scope of the present specification. Various examples can omit, substitute, or add various procedures or components as appropriate, and the embodiments described should not be taken as limiting. Some examples can also incorporate features of the other examples, where appropriate.

[0032] As shown in Figures 1 to 7 The present embodiment provides a rack car for coal mine roadway conveying, which comprises a conveying track 100, a rack 101 fixedly connected to the conveying track 100, and a conveying trolley 102 slidingly fitted to the conveying track 100. The conveying trolley 102 is provided with an emergency protection mechanism 200 at the front end, which is used to protect the conveying trolley 102 when the rack 101 has a depression.

[0033] The emergency protection mechanism 200 comprises a mounting plate 201 fixedly installed on the conveying trolley 102, at least two sliding columns 202 slidingly connected to the top of the mounting plate 201, and the sliding columns 202 penetrating through the top of the mounting plate 201. The bottom of the sliding column 202 is fixedly connected with a clamping tooth 203. A limiting clamping rod 204 is slidingly connected to the mounting plate 201, and the limiting clamping rod 204 penetrates through the mounting plate 201. The end of the limiting clamping rod 204 close to the clamping tooth 203 is clamped with the clamping tooth 203. The emergency protection mechanism 200 comprises a trigger assembly. When the trigger assembly is triggered, the limiting clamping rod 204 is pushed to slide away from the clamping tooth 203 and limits the clamping of the clamping tooth 203. After the limiting clamping rod 204 is disengaged from the limiting of the clamping tooth 203, the clamping tooth 203 moves towards the rack 101.

[0034] The triggering assembly comprises at least two supporting blocks 205, each of which is fixedly connected with the mounting plate 201, the supporting block 205 is directly rotationally connected with a rotating shaft 206, the rotating shaft 206 is fixedly connected with a plurality of rollers 207 at both ends, the rollers 207 abut against the conveying track 100, the two supporting blocks 205 are rotationally connected with a connecting ring 208 on one side close to each other, the connecting ring 208 is fixedly connected with a protective wheel 209 between the two connecting rings 208, the protective wheel 209 is provided with a pawl 211 at both ends, the rotating shaft 206 is fixedly connected with two ratchets 210 on the outer surface, and the ratchets 210 are engaged with the pawls 211.

[0035] Further, the bottom of the clamping tooth 203 can be provided with a rubber pad, so that when the clamping tooth 203 slides downward and contacts and clamps the rack 101, it has a certain buffering effect and can absorb a certain impact force, effectively reducing wear and tear and improving service life.

[0036] Further, the ratchets 210 and the pawls 211 are located inside the connecting ring 208, and the connecting ring 208 covers the ratchets 210 and the pawls 211, which can prevent impurities from entering and affecting the work, thereby ensuring the safety during subsequent use.

[0037] Reference Figure 4 The pawl 211 is composed of a fixed column, a torsion spring and a claw tooth, the fixed column is fixedly connected with the protective wheel 209, the torsion spring is fixedly connected with the claw tooth and the fixed column at both ends, and when the ratchet 210 rotates counterclockwise, the arc surface of the teeth of the ratchet 210 can push the pawl 211 to rotate, so that the ratchet 210 is not limited, and when the ratchet 210 rotates clockwise, the plane of the teeth of the ratchet 210 abuts against the pawl 211 and no longer pushes the pawl 211 to rotate, at this time, the ratchet 210 pushes the pawl 211 and the protective wheel 209 to rotate at the same time, thereby triggering the subsequent triggering work.

[0038] Further, the protective wheel 209 is fixedly connected with a plurality of convex strips 212 on the outer surface, each convex strip 212 is triangular, one side of the triangle is a plane, and the other side is an inclined surface, when the triggering assembly triggers, the triangular plane of the convex strip 212 pushes the limiting clamping rod 204 to slide.

[0039] Further, the triggering assembly further comprises a spring 213, the spring 213 is sleeved on the outer surface of the sliding column 202, and the spring 213 is fixedly connected with the mounting plate 201 and the clamping tooth 203 at both ends, for improving the moving speed of the clamping tooth 203 to the rack 101, so that the conveying trolley 102 pauses more quickly when retreating, and the safety during use is further improved.

[0040] Further, the teeth 203 are arranged in a tooth shape, so that when subsequently engaged with the rack 101, the engagement effect is better, and when the teeth 203 are triggered and inserted into the tooth gap in the rack 101, the teeth of the rack 101 may contact during the insertion process, but after a certain distance of continuous displacement, the teeth 203 will continue to be inserted into the rack 101.

[0041] Further, the outer surface of the roller 207 is arranged in a rough rubber material, and when in contact with the conveying track 100, the friction will increase, thereby making the rotation effect of the roller 207 better, so that it better triggers the movement of the teeth 203 when retreating.

[0042] The implementation of the embodiment timely brakes the conveying trolley 102 to prevent the speed from increasing when the trolley continues to retreat, thereby effectively avoiding the great impact generated by the retreat of the trolley, reducing the probability of accidents, improving the safety of the bottom gear of the conveying trolley 102 after being separated from the rack 101, ensuring the safety of the conveying work of the conveying trolley 102, and using the forward and reverse rotation of the roller 207 to drive the teeth 203 to move, thereby saving the use of power resources and not relying on the use of electricity, so that it can be applied to complex geological environments.

[0043] Further embodiments, the emergency protection mechanism 200 further comprises an auxiliary assembly, the auxiliary assembly is used for preventing the sliding column 202 from resetting, the auxiliary assembly comprises a fixed rod 221, the fixed rod 221 is fixedly connected to the outer surface of the sliding column 202, and the fixed rod 221 penetrates the mounting plate 201, and a plurality of limiting blocks 222 are fixedly connected to the side of the fixed rod 221 away from the sliding column 202.

[0044] The mounting plate 201 is fixedly connected with a mounting block 223 at the top, the mounting block 223 is rotatably connected with a stop block 224 on the side close to the limiting block 222, a torsional spring 225 is sleeved on the shaft end of the stop block 224, and the two ends of the torsional spring 225 are fixedly connected with the mounting block 223 and the stop block 224 respectively, a limiting piece 226 is fixedly connected to the side of the mounting block 223 close to the limiting block 222, and the limiting piece 226 is located above the stop block 224 and is used for limiting the rotating direction of the stop block 224.

[0045] Further, the side close to the limiting block 222 of the stop block 224 is arranged to be inclined upward, so that when the limiting block 222 pushes the stop block 224 to rotate, the stop block 224 arranged to be inclined can reduce the stress when contacting, thereby reducing wear and improving service life.

[0046] The implementation of the embodiment effectively enhances the engagement effect of the teeth 203 and the rack 101, avoids the rebound phenomenon of the teeth 203 due to external force after the teeth 203 are engaged with the rack 101, improves the effect of the teeth 203 when limiting, and further improves the safety of the emergency protection mechanism 200 for protecting the conveying trolley 102.

[0047] The working principle of all the above embodiments is as follows:

[0048] Initial state: one side of the limiting clamping rod 204 is in clamping state with the clamping tooth 203, and the clamping tooth 203 cannot move downward under the limiting of the limiting clamping rod 204, at this time the spring 213 is in compressed state.

[0049] The working principle of the emergency protection mechanism 200 and its beneficial effects are as follows:

[0050] When the conveying trolley 102 is normally used, the emergency protection mechanism 200 is installed in the advancing direction of the conveying trolley 102, at this time the roller 207 is in contact with the conveying track 100, so that Figure 4 For reference, the roller 207 rotates counterclockwise at this time, the roller 207 rotates to drive the rotating shaft 206 to rotate, the rotating shaft 206 drives the ratchet wheel 210 to rotate, at this time the ratchet wheel 210 will drive the pawl 211 to rotate, and then will not drive the protection wheel 209 to rotate.

[0051] When the conveying trolley 102 is in steep slope area, the rack 101 appears settlement due to geological subsidence, the bottom gear of the conveying trolley 102 and the rack 101 appear poor meshing effect, and the derailment phenomenon appears, the conveying trolley 102 will continue to move forward for a distance by inertia, and then the conveying trolley 102 will retreat, and then Figure 4 For reference, and then make the roller 207 rotate clockwise, drive the rotating shaft 206 to rotate clockwise, the ratchet wheel 210 rotates at the same time, at this time, the ratchet wheel 210 rotates will prevent the ratchet wheel 210 from rotating, then the ratchet wheel 210 will drive the protection wheel 209 to rotate clockwise under the guidance of the connecting ring 208, when the protection wheel 209 rotates clockwise, the convex strip 212 rotates at the same time, at this time the plane of the convex strip 212 will approach the direction of the limiting clamping rod 204, and then the plane of the convex strip 212 pushes the limiting clamping rod 204 away from one side of the clamping tooth 203, under the pushing force, the limiting clamping rod 204 and the clamping tooth 203 on one side of the clamping tooth 203 will move away from the clamping tooth 203, so as to be separated from the clamping tooth 203, at this time the clamping tooth 203 will move downward rapidly under the pushing of gravity and the spring 213, approach the rack 101, and insert into the tooth gap of the rack 101, so as to pause the retreat of the conveying trolley 102, and wait for the staff to come to overhaul and handle the conveying trolley 102.

[0052] Through the setting of the emergency protection mechanism 200, when the derailment phenomenon occurs, through the cooperation of the clamping tooth 203 and the trigger assembly, the clamping tooth 203 is quickly close to the rack 101 direction and inserted into the tooth gap of the rack 101, so as to brake the transport trolley 102 in time, prevent the speed of the trolley from accelerating when continuing to retreat, thereby effectively avoiding the huge impact generated by the retreat of the trolley, reducing the probability of accidents, improving the safety of the transport trolley 102 after the bottom gear and the rack 101 are separated, and ensuring the safety of the transport work of the transport trolley 102.

[0053] At the same time, through the setting of the trigger assembly, when the transport trolley 102 is working normally, the transport trolley 102 is in contact with the transport track 100 through the rotating shaft 206 and the roller 207, which assists in guiding the transport trolley 102 and improves the stability of the transport trolley 102. At the same time, the forward and reverse rotation of the roller 207 drives the clamping tooth 203 to move, saving the use of electric power resources and not relying on the use of electricity, so that it can be applied to complex geological environment.

[0054] Further, when the clamping tooth 203 slides under the guidance of the sliding column 202, the fixed rod 221 is also slid downward, and the limiting block 222 is also slid downward. When the limiting block 222 slides downward, under the cooperation of the stop block 224 and the torsional spring 225, the limiting block 222 pushes the stop block 224 to continuously rotate downward and resets under the rebound of the torsional spring 225. If the fixed rod 221 and the limiting block 222 slide upward after the clamping tooth 203 is clamped with the rack 101, the limiting block 222 cannot push the stop block 224 to rotate upward under the limiting of the limiting sheet 226, so that the fixed rod 221 and the sliding column 202 cannot rotate upward, thereby effectively enhancing the clamping effect of the clamping tooth 203 and the rack 101, avoiding the phenomenon that the clamping tooth 203 rebounds under external force after being clamped with the rack 101, improving the effect of the limiting of the clamping tooth 203, and further improving the safety of the protection of the transport trolley 102 by the emergency protection mechanism 200.

[0055] It should be noted that after the rack 101 is repaired, if the transport trolley 102 is to be reset, the bolts on the top of the mounting block 223 can be disassembled, and then the mounting block 223 is slid to make the stop block 224 away from the limiting block 222. At this time, the fixed rod 221 and the transport trolley 102 can be pulled to reset, thereby facilitating the next safety protection work.

[0056] The above describes the embodiments of the present application, but the embodiments are not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not limiting. Those skilled in the art can make many forms under the inspiration of the embodiments, which all belong to the protection of the embodiments.

Claims

1. A rack and pinion car for conveying coal mine roadways, comprising a conveying track (100), a rack (101) fixedly connected to the conveying track (100), and a conveying trolley (102) slidably fitted on the conveying track (100), characterized in that, An emergency protection mechanism (200) is installed at the forward end of the conveying trolley (102) to protect the conveying trolley (102) when the rack (101) is dented; The emergency protection mechanism (200) includes a mounting plate (201) fixedly installed on a conveying trolley (102). At least two sliding posts (202) are slidably connected to the top of the mounting plate (201), and the sliding posts (202) penetrate the top of the mounting plate (201). A locking tooth (203) is fixedly connected to the bottom of each sliding post (202). A limiting rod (204) is slidably connected to the mounting plate (201), and the limiting rod (204) penetrates the top of the mounting plate (201). The mounting plate (201) has a limiting lever (204) that engages with the tooth (203) at one end. The emergency protection mechanism (200) includes a triggering component. When the triggering component is triggered, it pushes the limiting lever (204) to slide away from the tooth (203) and limits the engagement of the tooth (203). After the limiting lever (204) disengages from limiting the tooth (203), the tooth (203) moves toward the rack (101).

2. The rack rail car for coal mine roadway transportation according to claim 1, characterized in that: The triggering component includes at least two support blocks (205), each of which is fixedly connected to the mounting plate (201). The support block (205) is directly rotatably connected to a rotating shaft (206). Rollers (207) are fixedly connected to both ends of the rotating shaft (206). The rollers (207) abut against the conveying track (100). A connecting ring (208) is rotatably connected to one side of the two support blocks (205). A protective wheel (209) is fixedly connected between the two connecting rings (208). Pads (211) are provided at both ends of the protective wheel (209). Two ratchet wheels (210) are fixedly connected to the outer surface of the rotating shaft (206). The ratchet wheels (210) mesh with the pawls (211).

3. The rack rail car for coal mine roadway transportation according to claim 2, characterized in that: Both the ratchet (210) and the pawl (211) are located inside the connecting ring (208).

4. A rack rail car for coal mine roadway transportation according to claim 2, characterized in that: The outer surface of the protective wheel (209) is fixedly connected with a plurality of protrusions (212), each of the protrusions (212) being triangular.

5. A rack rail car for coal mine roadway transportation according to claim 1, characterized in that: The triggering component also includes a spring (213), which is sleeved on the outer surface of the sliding column (202). The two ends of the spring (213) are fixedly connected to the mounting plate (201) and the locking tooth (203) respectively, and are used to increase the moving speed of the locking tooth (203) toward the rack (101).

6. A rack rail car for coal mine roadway transportation according to claim 1, characterized in that: The locking teeth (203) are configured with a tooth shape.

7. A rack rail car for coal mine roadway transportation according to claim 2, characterized in that: The outer surface of the roller (207) is made of an uneven rubber material.

8. A rack rail car for coal mine roadway transportation according to claim 1, characterized in that: The emergency protection mechanism (200) also includes an auxiliary component for preventing the sliding column (202) from resetting. The auxiliary component includes a fixing rod (221), which is fixedly connected to the outer surface of the sliding column (202) and penetrates the mounting plate (201). Multiple limiting blocks (222) are fixedly connected to the side of the fixing rod (221) away from the sliding column (202).

9. A rack rail car for coal mine roadway transportation according to claim 8, characterized in that: The mounting plate (201) is fixedly connected to the top of the mounting block (223). The mounting block (223) is rotatably connected to the stop block (224) on the side near the limit block (222). The end of the stop block (224) is fitted with a torsion spring (225). The two ends of the torsion spring (225) are fixedly connected to the mounting block (223) and the stop block (224) respectively. The mounting block (223) is fixedly connected to the side near the limit block (222) with a limit piece (226). The limit piece (226) is located above the stop block (224) and is used to limit the rotation direction of the stop block (224).

10. A rack rail car for coal mine roadway transportation according to claim 9, characterized in that: The stop (224) is inclined above the side near the limiting block (222).

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