A type of safety transport vehicle for use in mine tunnels

Abstract

This application relates to a safety transport vehicle for use in mine roadways, specifically within the technical field of mining transport vehicles. The vehicle includes a body, movable wheels, and a speed-limiting assembly. The movable wheels are rotatably connected to the body. The speed-limiting assembly includes a corrugated cylinder, a centrifugal plate, and a damper. The corrugated cylinder is connected to the body and positioned within a speed-limiting groove on the movable wheel. The centrifugal plate is slidably positioned within the centrifugal groove on the movable wheel. A stabilizing spring is positioned between the centrifugal plate and the bottom of the centrifugal groove. A slider is connected to the centrifugal plate and slidably positioned within a speed-limiting groove on the movable wheel. A one-way guide is positioned within the speed-limiting groove. The damper is connected to the centrifugal plate and has a speed-limiting spring on it. The speed-limiting spring drives the damper to reset after being compressed. When the slider slides past the one-way guide, the guide provides support, allowing the damper and speed-limiting spring to be compressed by the inner wall of the corrugated cylinder. This application enables the transport vehicle to self-limit its speed when traction power fails.

Description

Technical Field

[0001] This application relates to the technical field of mining transport vehicles, and in particular to a safety transport vehicle for use in mine roadways. Background Technology

[0002] In the process of ore mining, non-powered transport vehicles are usually used to transport the mined ore or the waste generated during the mining process. Non-powered transport vehicles are an important means of transportation in the ore mining process.

[0003] Non-powered transport vehicles primarily move by traction. Since these vehicles typically lack braking components, braking along the track during traction usually requires the assistance of wheel chocks or brakes. However, when traction power fails—for example, if the traction rope breaks or disconnects from the vehicle—the vehicle will move freely along the track under gravity. If the vehicle is on a slope, its speed will increase rapidly, increasing the risk of overturning or violent collisions. Therefore, there is an urgent need for a safety transport vehicle capable of self-limiting its speed in the event of traction power failure. Summary of the Invention

[0004] In order to enable the transport vehicle to self-limit its speed in the event of traction failure, so as to avoid safety accidents such as rollover or violent collision, this application provides a safety transport vehicle for use in mine roadways.

[0005] This application provides a safety transport vehicle for use in mine roadways, which adopts the following technical solution:

[0006] A safety transport vehicle for use in mine roadways includes a vehicle body, movable wheels, and a speed limiting component. The movable wheels are rotatably connected to the vehicle body, and the speed limiting component includes a corrugated cylinder, a centrifugal plate, and a damper.

[0007] The corrugated cylinder is connected to the vehicle body and is set in the speed limiting groove opened on the moving wheel. The corrugated cylinder and the moving wheel are coaxially set. The centrifugal plate is slidably set in the centrifugal groove opened on the groove wall of the speed limiting groove. A stabilizing spring is set between the centrifugal plate and the bottom of the centrifugal groove. The stabilizing spring is used to drive the centrifugal plate to slide towards the axis of the moving wheel.

[0008] A slider is connected to the centrifuge plate. The slider is slidably set in a speed-limiting groove opened on the wall of the centrifuge tank. A one-way guide is set in the speed-limiting groove. The one-way guide is used to allow the slider to slide past itself from the direction away from the axis of the moving wheel, and to restrict the slider from sliding past itself from the direction close to the axis of the moving wheel.

[0009] The damper is connected to the centrifugal plate and is equipped with a speed-limiting spring. The speed-limiting spring is used to drive the damper to return to the extended state after being compressed. When the moving wheel rotates and the slider slides between the one-way guide and the end of the speed-limiting groove near the axis of the moving wheel, there is a gap between the end of the damper near the bellows and the trough of the bellows. When the moving wheel rotates and the slider slides past the one-way guide, the end of the damper near the bellows can press against the trough of the bellows, and the damper is in a contracted state when it presses against the trough of the bellows.

[0010] Optionally, the centrifugal plate and the damper are arranged in two or more around the axis of the moving wheel. When the slider slides past the unidirectional guide, at least one damper is contracting as all the dampers rotate with the moving wheel.

[0011] Optionally, at least two unidirectional guide members are provided along the sliding direction of the slider. Each time the slider slides past a unidirectional guide member, the amount of contraction of the damper when it is pressed against the trough of the corrugated cylinder increases once. When the slider slides past the unidirectional guide member furthest from the axis of the moving wheel, the amount of contraction of the damper when it is pressed against the trough of the corrugated cylinder increases to the maximum value.

[0012] Optionally, the unidirectional guide includes a guide plate and a torsion spring. Two guide plates are symmetrically arranged, and one end of each guide plate is hinged to a clearance groove opened on two opposite groove walls of the speed limiting slide. The guide plate can be completely inserted into the clearance groove. Two torsion springs are arranged, corresponding one-to-one with the guide plates. The torsion springs are arranged between the guide plate and the groove wall of the clearance groove. The torsion springs are used to drive the guide plate to swing out of the clearance groove so that the ends of the two guide plates away from the hinge point abut against each other.

[0013] Optionally, it also includes an adjustment assembly, which includes an adjustment part and a fixing part. The adjustment part includes an adjustment head and an adjustment rod. The adjustment head is slidably disposed in an adjustment groove opened on the movable wheel. The adjustment groove is connected to the clearance groove. An adjustment groove is opened on the side of the adjustment head near the clearance groove. One end of the adjustment rod is connected to the end of the guide plate near the hinge.

[0014] The adjusting head has three adjusting positions. When the adjusting head slides to the first adjusting position, the adjusting groove is connected to the clearance groove, and the adjusting rod can be inserted into the clearance groove when the guide plate is inserted into the clearance groove. The adjusting rod can also be inserted into the adjusting groove when the guide plate is inserted into the speed limiting groove, so that the guide plate is in a swinging state. When the adjusting head slides to the second adjusting position, the adjusting head pushes the adjusting rod into the clearance groove to restrict the guide plate from being in the clearance groove. When the adjusting head slides to the third adjusting position, the groove wall of the adjusting groove abuts against the adjusting rod to restrict the guide plate from sliding into the clearance groove. The fixing part is used to apply a fixing force to the adjusting head when the adjusting head slides to any adjusting position.

[0015] Optionally, the adjusting part further includes a cam top block and a push rod. The cam top block is slidably disposed in a cam groove opened on the moving wheel. The push rod is slidably disposed on the moving wheel, inserted into the adjusting groove, and connected to the adjusting head. The push rod is also inserted into the cam groove and slidably connected to the working surface of the cam top block. The working surface of the cam top block is provided with three working positions at different heights. The three working positions of the cam top block correspond one-to-one with the three adjusting positions of the adjusting head.

[0016] Optionally, the cam top block is connected to an adjusting slide rod, which slides through the movable wheel and extends out of the movable wheel. A handle is connected to the end of the adjusting slide rod away from the cam top block.

[0017] Optionally, the fixing part includes a fixing seat and a fixing screw. The fixing seat is connected to the movable wheel, and the fixing screw is threaded through the fixing seat. The adjusting slide rod has three position fixing slots. The end of the fixing screw is used to be threaded into any one of the position fixing slots. The three position fixing slots correspond one-to-one with the three adjustment positions of the adjusting head.

[0018] Optionally, a sliding seat is connected to the push rod, and the sliding seat is slidably disposed in a sliding groove opened on the working surface of the cam push block.

[0019] Optionally, a roller is rotatably connected to the end of the damper away from the centrifugal plate.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. This application discloses a safety transport vehicle for use in mine roadways, comprising a vehicle body, movable wheels, and a speed limiting component. During rotation, the movable wheels exert centrifugal force on a centrifugal plate and a damper. Under the action of centrifugal force, the centrifugal plate and damper overcome the elastic force of the stabilizing spring and slide away from the axis of the movable wheels. When the vehicle body is normally tractioned, the rotational speed of the movable wheels does not exceed a preset speed. The slider only slides between the unidirectional guide and the end of the speed limiting groove near the axis of the movable wheels. At this time, the damper is unlikely to compress against the inner wall of the bellows, thus making the transport vehicle less susceptible to speed limiting resistance. When traction power fails, the vehicle body can drive the moving wheel to accelerate freely. When the speed of the moving wheel exceeds the preset speed, the slider can slide down through the one-way guide under the drive of centrifugal force. The one-way guide prevents the slider from sliding back to the axis of the moving wheel and provides support force to the slider, so that the damper and the speed limiting spring can exert a squeezing effect on the inner wall of the bellows. After being compressed, the damper and the speed limiting spring can form a speed limiting resistance on the rotation of the moving wheel relative to the bellows, so that the transport vehicle can limit its speed when traction power fails, avoiding safety accidents such as rollover or violent collision.

[0022] 2. The safety transport vehicle for mine roadways provided in this application also includes an adjustment assembly. The adjustment slide rod can drive the adjustment head to slide through the cam top block and the top rod to adjust the position of the adjustment head. By placing the adjustment head in different adjustment positions, the state of the guide plate can be adjusted. When the adjustment head is in the first adjustment position, the guide plate is in a state that can swing with external force. When the adjustment head is in the second adjustment position, the unidirectional sliding restriction of the guide plate on the slider can be released. When the adjustment head is in the third adjustment position, the slider is difficult to slide past the guide plate, making it easy for the transport vehicle to be quickly moved. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0024] Figure 2 This is a structural diagram showing the assembly relationship between the movable wheel and the bellows;

[0025] Figure 3 This is a structural diagram of the speed limiter component;

[0026] Figure 4 This is a structural diagram showing the positional relationship between the corrugated cylinder and the rollers;

[0027] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0028] Figure 6 This is a schematic diagram of the structure of a unidirectional conduction component;

[0029] Figure 7 This is a schematic diagram of the adjustment component;

[0030] Figure 8 yes Figure 7 A magnified view of point B in the middle.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Vehicle body; 2. Moving wheel; 21. Speed ​​limiting groove; 22. Centrifugal groove; 23. Speed ​​limiting slide groove; 24. Clearance groove; 25. Adjustment slide groove; 26. Cam slide groove; 3. Speed ​​limiting component; 31. Corrugated cylinder; 32. Centrifugal plate; 321. Stabilizing spring; 322. Slider; 33. Damper; 331. Speed ​​limiting spring; 332. Roller; 34. One-way guide component; 341. Guide plate; 342. Torsion spring; 4. Adjustment component; 41. Adjustment part; 411. Adjustment head; 4111. Adjustment groove; 412. Adjustment rod; 413. Cam top block; 4131. Sliding groove; 414. Top rod; 4141. Sliding seat; 415. Adjustment slide rod; 4151. Handle; 4152. Position fixing groove; 42. Fixing part; 421. Fixing seat; 422. Fixing screw. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0034] This application discloses a safety transport vehicle for use in mine roadways. (Refer to...) Figure 1 A safety transport vehicle for use in mine tunnels includes a vehicle body 1, movable wheels 2, and a speed limiting component 3.

[0035] There are four symmetrically arranged movable wheels 2, and all four movable wheels 2 are rotatably connected to the vehicle body 1. There are four sets of speed limiting components 3, which correspond one-to-one with the movable wheels 2.

[0036] Reference Figure 2 and Figure 3 The speed limiting component 3 includes a bellows 31, a centrifugal plate 32, and a damper 33.

[0037] Reference Figure 1 and Figure 3 The corrugated cylinder 31 is cylindrical with a wavy cross-section along its axial direction. One end of the corrugated cylinder 31 is fixed to the vehicle body 1. The corrugated cylinder 31 is disposed within a speed-limiting groove 21 opened on the moving wheel 2, and the central axis of the corrugated cylinder 31 is coaxial with the axis of the moving wheel 2. The centrifugal plate 32 is slidably disposed within a centrifugal groove 22 opened on the groove wall of the speed-limiting groove 21. The sliding direction of the centrifugal plate 32 is the diameter direction of the moving wheel 2. A stabilizing spring 321 is fixed between the centrifugal plate 32 and the bottom of the centrifugal groove 22, and the stabilizing spring 321 is used to drive the centrifugal plate 32 to slide towards the axis of the moving wheel 2.

[0038] Reference Figure 3 Two sliders 322 are symmetrically fixed to the centrifugal plate 32. The two sliders 322 are arranged along the axis of the moving wheel 2. The sliders 322 are slidably disposed in the speed limiting groove 23 opened on the wall of the centrifugal tank 22. A one-way guide 34 is provided in the speed limiting groove 23. The one-way guide 34 is used to allow the slider 322 to slide past itself from the direction away from the axis of the moving wheel 2. The one-way guide 34 is used to restrict the slider 322 from sliding past itself from the direction close to the axis of the moving wheel 2. After the slider 322 slides past the one-way guide 34, the one-way guide 34 can serve as a support for the damper 33.

[0039] The damper 33 is fixedly connected to the side of the centrifugal plate 32 away from the axis of the moving wheel 2. A speed limiting spring 331 is sleeved on the damper 33. The two ends of the speed limiting spring 331 are fixedly connected to the fixed end and the movable end of the damper 33, respectively. The speed limiting spring 331 is used to drive the damper 33 to return to the extended state after being compressed. When the damper 33 and the speed limiting spring 331 are squeezed by the bellows 31, both the damper 33 and the speed limiting spring 331 can form resistance that hinders the rotation of the moving wheel 2 relative to the bellows 31.

[0040] When the moving wheel 2 rotates and causes the slider 322 to slide between the one-way guide 34 and the end of the speed limiting groove 23 near the axis of the moving wheel 2, there is a gap between the end of the damper 33 near the bellows 31 and the trough position of the bellows 31; when the moving wheel 2 rotates and causes the slider 322 to slide past the one-way guide 34, the end of the damper 33 near the bellows 31 can press against the trough position of the bellows 31, and the damper 33 is in a contracted state when it presses against the trough position of the bellows 31.

[0041] In use, when the vehicle body 1 is being towed normally, the moving wheel 2 can rotate at a speed not exceeding the preset speed, so that the centrifugal force on the centrifugal plate 32 is not higher than the preset centrifugal force. Under the action of the elastic force of the stabilizing spring 321, the slider 322 can slide between the unidirectional guide 34 and the end of the speed limiting groove 23 near the axis of the moving wheel 2, so that the damper 33 is difficult to touch the bellows 31. Thus, when the vehicle body 1 is being towed normally, it is difficult to be subjected to the speed limiting resistance from the damper 33 and the speed limiting spring 331.

[0042] After the traction power fails, the moving wheel 2 is in a free-moving state on the track. When the rotation speed of the moving wheel 2 gradually increases under the gravity drive of the car body 1, the rotation speed of the moving wheel 2 can exceed the preset rotation speed, so that the centrifugal force on the centrifugal plate 32 can be higher than the preset centrifugal force, so that the centrifugal plate 32 can slide past the one-way guide member 34. After the centrifugal plate 32 slides past the one-way guide member 34, the one-way guide member 34 restricts the slider 322 from sliding towards the axis of the moving wheel 2. At this time, the damper 33 can be compressed by the inner wall of the bellows 31 and contract. The damper 33 can compress the speed limiting spring 331 and contract. The reaction force exerted by the damper 33 and the speed limiting spring 331 on the inner wall of the bellows 31 forms the resistance of the moving wheel 2 to the rotation of the bellows 31, so as to hinder the increase of the rotation speed of the moving wheel 2. After the damper 33 slides past the trough position of the inner wall of the bellows 31, the speed limiting spring 331 can drive the damper 33 to extend, so that the damper 33 returns to its original position.

[0043] Based on the above analysis, under the elastic force of the stabilizing spring 321, when the rotational speed of the moving wheel 2 does not exceed the preset speed, the moving wheel 2 can assist the vehicle body 1 to move without resistance. When the rotational speed of the moving wheel 2 exceeds the preset speed, the slider 322 can slide past the one-way guide 34, and the slider 322 can be supported by the one-way guide 34, so that the damper 33 and the speed limiting spring 331 can be squeezed by the inner wall of the bellows 31, so that the moving wheel 2 can be subjected to speed limiting resistance, thereby enabling the transport vehicle to limit its speed when the traction power fails, avoiding safety accidents such as rollover or violent collision.

[0044] Reference Figure 3 and Figure 4In order to enable the damper 33 to continuously apply speed-limiting resistance to the moving wheel 2, at least two centrifugal plates 32 and dampers 33 are arranged around the axis of the moving wheel 2. When the slider 322 slides past the unidirectional guide 34, at least one damper 33 is contracting during the rotation of all dampers 33 with the moving wheel 2.

[0045] When the slider 322 passes the unidirectional guide 34, since there is always more than one damper 33 that will contract, the moving wheel 2 can be continuously subjected to the resistance generated by the damper 33 and the inner wall of the bellows 31, so that the moving wheel 2 can be continuously in the resistance-limited speed state.

[0046] Reference Figure 4 and Figure 5 In order for the damper 33 to limit the speed of the moving wheel 2 in stages, at least two one-way guide members 34 are provided along the sliding direction of the slider 322. Each time the slider 322 slides past a one-way guide member 34, the amount of contraction of the damper 33 when it is pressed against the trough of the bellows 31 increases once. When the slider 322 slides past the one-way guide member 34 furthest from the axis of the moving wheel 2, the amount of contraction of the damper 33 when it is pressed against the trough of the bellows 31 increases to the maximum value.

[0047] When the contraction of the damper 33 increases, the compression of the speed limiting spring 331 also increases, which increases the resistance formed by the speed limiting spring 331. As a result, when the slider 322 is supported by different unidirectional guide members 34, the resistance applied by the speed limiting spring 331 to the moving wheel 2 is also different. Moreover, the greater the increase in the rotational speed of the moving wheel 2, the greater the resistance applied by the speed limiting spring 331 to the moving wheel 2. Thus, the damper 33 and the speed limiting spring 331 can work together to limit the speed of the moving wheel 2 in stages. When the moving wheel 2 exceeds the minimum preset speed due to normal traction, such as when the traction power pulls the transport vehicle down a gentle slope, the moving wheel 2 is less likely to be subjected to a large speed limiting resistance instantaneously due to the staged speed limiting. This makes it less likely for the traction power to be damaged due to accidents. For example, when the traction rope pulls the transport vehicle down a slope, it is less likely to break due to the large speed limiting resistance caused by overspeed.

[0048] Specifically, refer to Figure 6 The unidirectional guide 34 includes a guide plate 341 and a torsion spring 342.

[0049] Reference Figure 5 and Figure 6Two guide plates 341 are symmetrically arranged. One end of each guide plate 341 is hinged to a relief groove 24 opened on the two opposite groove walls of the speed limiting slide 23, allowing the guide plates 341 to be fully inserted into the relief groove 24. Two torsion springs 342 are provided, corresponding one-to-one with the guide plates 341. The torsion springs 342 are located at the hinge of the guide plates 341, and their two ends are fixedly connected to the groove walls of the guide plates 341 and the relief groove 24, respectively. The torsion springs 342 are used to drive the guide plates 341 to swing out of the relief groove 24 so that the ends of the two guide plates 341 away from the hinge abut against each other. The abutting ends of the guide plates 341 are located on the side of their hinge ends away from the axis of the moving wheel 2.

[0050] The torsion spring 342 can drive the guide plate 341 to swing out of the clearance groove 24, so that the two symmetrical guide plates 341 can abut together when there is no external force interference. When the slider 322 is driven by centrifugal force to slide away from the axis of the moving wheel 2, the slider 322 can slide past the two guide plates 341, and the torsion spring 342 accumulates elastic force. After the slider 322 slides past the two guide plates 341, the two guide plates 341 can be reset under the elastic force of the torsion spring 342. After the two guide plates 341 are reset, they can abut together again. The two abutting guide plates 341 can not only prevent the slider 322 from sliding back to the axis of the moving wheel 2, but also provide support force for the slider 322 with the hinge as support, so that the slider 322 can form a unidirectional sliding relationship at the two guide plates 341.

[0051] Reference Figure 7 In order to facilitate the sliding of the damper 33 relative to the inner wall of the bellows 31, a roller 332 is rotatably connected to the end of the damper 33 away from the centrifugal plate 32. The roller 332 is used to roll on the inner wall of the bellows 31. Since the damper 33 slides on the inner wall of the bellows 31 through the roller 332, the friction between the damper 33 and the bellows 31 is reduced, making it less likely for the damper 33 and the bellows 31 to be damaged by friction.

[0052] Reference Figure 5 and Figure 7 In order to facilitate the adjustment of the position of the guide plate 341 so that the slider 322 can be reset, the safety transport vehicle in the mine roadway of this application also includes an adjustment component 4. The adjustment component 4 includes an adjustment part 41 and a fixing part 42. The adjustment part 41 includes an adjustment head 411 and an adjustment rod 412. Multiple adjustment heads 411 and adjustment rods 412 are provided, and each corresponds to the guide plate 341.

[0053] Reference Figure 5The adjusting head 411 is slidably disposed in the adjusting groove 25 opened on the moving wheel 2. The sliding direction of the adjusting head 411 is parallel to the sliding direction of the slider 322. The adjusting groove 25 is partially connected to the relief groove 24. The adjusting head 411 is provided with an adjusting groove 4111 on the side near the relief groove 24. One end of the adjusting rod 412 is fixedly connected to the end of the guide plate 341 near the hinge. The swing state of the adjusting rod 412 can directly control the swing state of the guide plate 341.

[0054] The adjusting head 411 has three adjusting positions. When the adjusting head 411 slides to the first adjusting position, the adjusting groove 4111 is connected to the clearance groove 24. The adjusting rod 412 can be swung into the clearance groove 24 when the guide plate 341 is swung into the clearance groove 24, and the adjusting rod 412 can be swung into the adjusting groove 4111 when the guide plate 341 is swung into the speed limiting slide groove 23, so that the guide plate 341 is in a swinging state.

[0055] When the adjusting head 411 slides to the second adjusting position, it pushes the adjusting rod 412 into the clearance groove 24, thus restricting the guide plate 341 from being within the clearance groove 24. When the adjusting head 411 slides to the third adjusting position, the wall of the adjusting groove 4111 abuts against the adjusting rod 412, thus restricting the guide plate 341 from sliding into the clearance groove 24. The fixing part 42 is used to apply a fixing force to the adjusting head 411 when it slides to any adjusting position, thereby fixing the position of the adjusting head 411.

[0056] The position of the guide plate 341 can be adjusted by sliding the adjusting head 411. When the adjusting head 411 slides to the first adjustment position, the guide plate 341 is in a state that can swing with external force. At this time, the guide plate 341 can form a one-way sliding relationship with the slider 322, so that the slider 322 can form a speed-limiting resistance with the guide plate 341 as support. When the adjusting head 411 slides to the second adjustment position, the adjusting head 411 can push the adjusting rod 412 to make the guide plate 341 swing into the relief groove 24, so as to release the sliding resistance of the guide plate 341. The one-way sliding restriction of block 322 allows slider 322 to slide down towards the axis of moving wheel 2 under the elastic force of stabilizing spring 321 and reset. When adjusting head 411 slides to the third adjustment position, the adjusting head 411 can restrict the rotation of guide plate 341 by the groove wall of adjusting groove 4111, making it difficult for slider 322 to slide over the two abutting guide plates 341 under the drive of centrifugal force. This makes it difficult for damper 33 and speed limiting spring 331 to form speed limiting resistance on moving wheel 2, making it easy for transport vehicle to quickly move.

[0057] Reference Figure 7To facilitate the adjustment of the position of the adjusting head 411, the adjusting part 41 also includes a cam top block 413 and a top rod 414. Multiple cam top blocks 413 and top rods 414 are provided, and they correspond one to one. Multiple top rods 414 are located on both sides of each centrifuge tank 22.

[0058] The cam top block 413 is slidably disposed in the cam groove 26 opened on the moving wheel 2. The sliding direction of the cam top block 413 is parallel to the axis of the moving wheel 2. The push rod 414 is slidably disposed on the moving wheel 2. The push rod 414 is inserted into the adjusting groove 25 and is fixedly connected to all the adjusting heads 411 on the side of the centrifugal tank 22 near the push rod 414. The push rod 414 is also inserted into the cam groove 26. The end of the push rod 414 is slidably connected to the working surface of the cam top block 413. The working surface of the cam top block 413 is provided with three working positions at different heights. The three working positions of the cam top block 413 correspond one-to-one with the three adjusting positions of the adjusting heads 411.

[0059] The central working position of the cam top block 413 corresponds to the first adjustment position of the adjusting head 411, the working position of the cam top block 413 closest to the axis of the moving wheel 2 corresponds to the second adjustment position of the adjusting head 411, and the working position of the cam top block 413 furthest from the axis of the moving wheel 2 corresponds to the third adjustment position of the adjusting head 411.

[0060] The sliding cam top block 413 can push and pull the push rod 414 to slide. Since the push rod 414 is connected to the adjusting head 411, when the cam top block 413 slides, the push rod 414 can drive the adjusting head 411 to slide. Thus, through the three working positions set on the cam top block 413, the adjusting head 411 can easily slide between the three adjustment positions.

[0061] Specifically, refer to Figure 8 A sliding seat 4141 is fixedly connected to the push rod 414. The sliding seat 4141 is slidably disposed in the sliding groove 4131 opened on the working surface of the cam top block 413. The sliding seat 4141 and the sliding groove 4131 form a sliding connection structure between the push rod 414 and the cam top block 413.

[0062] Reference Figure 7 In order to facilitate the adjustment of the position of the cam top block 413, all the cam top blocks 413 are fixedly connected to the adjustment slide rod 415. The adjustment slide rod 415 slides through the moving wheel 2 and extends out of the moving wheel 2. The end of the adjustment slide rod 415 away from the cam top block 413 is fixedly connected to the handle 4151.

[0063] The handle 4151 can drive the adjustment slide 415 to slide, and the adjustment slide 415 can drive the cam top block 413 to slide, making it easy for the user to drive the adjustment head 411 to slide, thereby making it easy to change the three adjustment positions of the adjustment head 411. Furthermore, since the adjustment slide 415 can synchronously drive all the cam top blocks 413 on a moving wheel 2 to slide, all the adjustment heads 411 can be adjusted synchronously.

[0064] Specifically, refer to Figure 7 The fixing part 42 includes a fixing seat 421 and a fixing screw 422. The fixing seat 421 is fixedly connected to the moving wheel 2. The fixing screw 422 is threaded through the fixing seat 421. The adjusting slide rod 415 has three position fixing slots 4152. The end of the fixing screw 422 is used to be threaded into any one of the position fixing slots 4152. The three position fixing slots 4152 correspond one-to-one with the three adjusting positions of the adjusting head 411.

[0065] The centrally located position fixing groove 4152 corresponds to the first adjustment position of the adjusting head 411, the position fixing groove 4152 closest to the moving wheel 2 corresponds to the second adjustment position of the adjusting head 411, and the position fixing groove 4152 furthest from the moving wheel 2 corresponds to the third adjustment position of the adjusting head 411.

[0066] By screwing the fixing screw 422 into the fixing groove 4152 at different positions, the position of the adjusting slide 415 can be fixed, thereby fixing the position of the adjusting head 411 after adjustment.

[0067] The implementation principle of a safety transport vehicle for mining roadways according to this application embodiment is as follows: During use, after traction power fails, the movable wheel 2 accelerates under the gravity of the vehicle body 1. When the rotational speed of the movable wheel 2 exceeds the preset speed, the centrifugal plate 32, damper 33, and slider 322 overcome the elastic force of the stabilizing spring 321 and slide away from the axis of the movable wheel 2. The slider 322 slides past the two contacting guide plates 341. After the slider 322 slides past, the two guide plates 341 return to the contact state through the elastic force of the torsion spring 342, and slide away from the axis of the movable wheel 2. Block 322 provides support. Under the support of the two guide plates 341, the centrifugal plate 32 can provide compressive support to the damper 33, so that the damper 33 and the speed limiting spring 331 can be squeezed by the inner wall of the bellows 31. The contracted damper 33 and the compressed speed limiting spring 331 generate speed limiting resistance on the inner wall of the bellows 31. The speed limiting resistance hinders the increase of the speed of the moving wheel 2, so that the moving wheel 2 can be resisted when it accelerates freely. Thus, when the traction power fails, the transport vehicle can limit its speed to avoid safety accidents such as rollover or violent collision.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A safety transport vehicle for use in mine roadways, characterized in that: It includes a vehicle body (1), a moving wheel (2) and a speed limiting component (3). The moving wheel (2) is rotatably connected to the vehicle body (1). The speed limiting component (3) includes a bellows (31), a centrifugal plate (32) and a damper (33). A corrugated cylinder (31) is connected to the vehicle body (1) and is set in the speed limiting groove (21) opened on the moving wheel (2). The corrugated cylinder (31) and the moving wheel (2) are coaxially arranged. The centrifugal plate (32) is slidably set in the centrifugal groove (22) opened on the groove wall of the speed limiting groove (21). A stabilizing spring (321) is set between the centrifugal plate (32) and the bottom of the centrifugal groove (22). The stabilizing spring (321) is used to drive the centrifugal plate (32) to slide towards the axis of the moving wheel (2). A slider (322) is connected to the centrifuge plate (32). The slider (322) is slidably disposed in a speed limiting groove (23) opened on the wall of the centrifuge tank (22). A one-way guide (34) is provided in the speed limiting groove (23). The one-way guide (34) is used to allow the slider (322) to slide past itself from a direction away from the axis of the moving wheel (2). The one-way guide (34) is used to restrict the slider (322) from sliding past itself from a direction close to the axis of the moving wheel (2). The damper (33) is connected to the centrifugal plate (32). A speed limiting spring (331) is provided on the damper (33). The speed limiting spring (331) is used to drive the damper (33) to return to the extended state after being compressed. When the moving wheel (2) rotates and the slider (322) slides between the one-way guide (34) and the end of the speed limiting groove (23) near the axis of the moving wheel (2), there is a gap between the end of the damper (33) near the bellows (31) and the trough position of the bellows (31). When the moving wheel (2) rotates and the slider (322) slides past the one-way guide (34), the end of the damper (33) near the bellows (31) can press against the trough position of the bellows (31), and the damper (33) is in a contracted state when it presses against the trough position of the bellows (31).

2. A safety transport vehicle for use in mine roadways according to claim 1, characterized in that: The centrifugal plate (32) and damper (33) are arranged in two or more around the axis of the moving wheel (2). When the slider (322) slides past the unidirectional guide (34), at least one damper (33) is contracting during the rotation of all dampers (33) with the moving wheel (2).

3. A safety transport vehicle for use in mine roadways according to claim 1, characterized in that: At least two unidirectional guide members (34) are provided along the sliding direction of the slider (322). Each time the slider (322) slides past a unidirectional guide member (34), the amount of contraction of the damper (33) when it is pressed against the trough of the corrugated cylinder (31) increases once. When the slider (322) slides past the unidirectional guide member (34) furthest from the axis of the moving wheel (2), the amount of contraction of the damper (33) when it is pressed against the trough of the corrugated cylinder (31) increases to the maximum value.

4. A safety transport vehicle for use in mine roadways according to claim 1, characterized in that: The unidirectional guide (34) includes a guide plate (341) and a torsion spring (342). Two guide plates (341) are symmetrically arranged. One end of each guide plate (341) is hinged to a relief groove (24) opened on the two opposite groove walls of the speed limiting slide (23). The guide plate (341) can be completely inserted into the relief groove (24). Two torsion springs (342) are arranged and correspond one-to-one with the guide plate (341). The torsion springs (342) are arranged between the guide plate (341) and the groove wall of the relief groove (24). The torsion springs (342) are used to drive the guide plate (341) to swing out of the relief groove (24) so ​​that the ends of the two guide plates (341) away from the hinge point abut against each other.

5. A safety transport vehicle for use in mine roadways according to claim 4, characterized in that: It also includes an adjustment assembly (4), which includes an adjustment part (41) and a fixing part (42). The adjustment part (41) includes an adjustment head (411) and an adjustment rod (412). The adjustment head (411) is slidably disposed in an adjustment groove (25) opened on the moving wheel (2). The adjustment groove (25) is partially connected to the relief groove (24). An adjustment groove (4111) is opened on the side of the adjustment head (411) near the relief groove (24). One end of the adjustment rod (412) is connected to the end of the guide plate (341) near the hinge. The adjusting head (411) has three adjusting positions. When the adjusting head (411) slides to the first adjusting position, the adjusting groove (4111) is connected to the relief groove (24). The adjusting rod (412) can be inserted into the relief groove (24) when the guide plate (341) is inserted into the relief groove (24). The adjusting rod (412) can be inserted into the adjusting groove (4111) when the guide plate (341) is inserted into the speed limiting slide groove (23), so that the guide plate (341) is in a swinging state. When the adjusting head (411) slides to the first adjusting position, the adjusting groove (4111) is connected to the relief groove (24) when the guide plate (341) is inserted into the speed limiting slide groove (23), so that the guide plate (341) is in a swinging state. When the adjustment head (411) is in the second adjustment position, the adjustment head (411) pushes the adjustment rod (412) into the relief groove (24) to restrict the guide plate (341) from being in the relief groove (24). When the adjustment head (411) slides to the third adjustment position, the groove wall of the adjustment groove (4111) abuts against the adjustment rod (412) to restrict the guide plate (341) from sliding into the relief groove (24). The fixing part (42) is used to apply a fixing force to the adjustment head (411) when the adjustment head (411) slides to any adjustment position.

6. A safety transport vehicle for use in mine roadways according to claim 5, characterized in that: The adjustment unit (41) further includes a cam top block (413) and a push rod (414). The cam top block (413) is slidably disposed in the cam groove (26) opened on the moving wheel (2). The push rod (414) is slidably disposed on the moving wheel (2). The push rod (414) is inserted into the adjustment groove (25) and connected to the adjustment head (411). The push rod (414) is also inserted into the cam groove (26) and slidably connected to the working surface of the cam top block (413). The working surface of the cam top block (413) is provided with three working positions at different heights. The three working positions of the cam top block (413) correspond one-to-one with the three adjustment positions of the adjustment head (411).

7. A safety transport vehicle for use in mine roadways according to claim 6, characterized in that: The cam top block (413) is connected to an adjusting slide rod (415), which slides through the moving wheel (2) and extends out of the moving wheel (2). A handle (4151) is connected to the end of the adjusting slide rod (415) away from the cam top block (413).

8. A safety transport vehicle for use in mine roadways according to claim 7, characterized in that: The fixing part (42) includes a fixing seat (421) and a fixing screw (422). The fixing seat (421) is connected to the moving wheel (2). The fixing screw (422) is threaded through the fixing seat (421). The adjusting slide rod (415) has three position fixing slots (4152). The end of the fixing screw (422) is used to be threaded into any one of the position fixing slots (4152). The three position fixing slots (4152) correspond one-to-one with the three adjustment positions of the adjusting head (411).

9. A safety transport vehicle for use in mine roadways according to claim 6, characterized in that: The push rod (414) is connected to a sliding seat (4141), which is slidably disposed in a sliding groove (4131) opened on the working surface of the cam push block (413).

10. A safety transport vehicle for use in mine roadways according to claim 1, characterized in that: A roller (332) is rotatably connected to the end of the damper (33) away from the centrifugal plate (32).

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