Novel limiting device of coal mining machine
By designing two hydraulic buffers and check mechanisms in the limiting device of the coal miner, the secondary impact and sliding problems of the coal miner when the hydraulic buffer piston rod rebounds are solved, and the stable and rapid stop of the coal miner is achieved.
Patent Information
- Application Number
- CN202421362747.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-14
AI Technical Summary
When the hydraulic buffer piston rod rebounds, the existing coal mining machine limiting device can easily cause the coal mining machine to slide back and secondary impact, and it is difficult to stop stably and quickly.
A new type of coal mining machine limiting device is designed, adopting two hydraulic buffers and a check mechanism. Through the combination of sliding seat, limit support plate and triangle reinforcement plate, the double buffering measures of the hydraulic buffer and the multiple sets of rotation shafts and torsion springs of the check mechanism are used to avoid rebounding of the piston rod, and drive the limit plate and limit rotary rod to work together to achieve stable and rapid stopping.
It effectively avoids the secondary impact and sliding problems of piston rod rebound on the coal mining machine, improves the buffering capacity of impact force, and ensures that the coal mining machine is stable and fast stopping.
Smart Images
Figure CN222879679U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of limiting devices, and in particular relates to a novel limiting device for a coal mining machine. Background Art
[0002] Coal mining machine is a kind of mechanical equipment used for mining, mainly used for coal mining operations in coal mines. Its working principle is to use cutting gears to cut coal gangue, and then send the coal gangue to the ground through a conveyor. Coal mining machines generally need to be carried out along tracks. Due to the generation of certain dust during coal mining, coupled with the spray used for dust reduction, it is difficult for the operator to see the situation in the direction of the coal mining machine. In order to prevent the coal mining machine from escaping from one end of the track, a limit mechanism is generally set at both ends of the track to block the coal mining machine. In order to buffer the impact force when the coal mining machine collides with the limit mechanism and avoid damage to the coal mining machine caused by the impact force, a hydraulic buffer is generally used to buffer the impact force. However, there are the following improvements in the prior art: since the hydraulic buffer will automatically rebound after the piston rod is compressed, it is easy to drive the coal mining machine to slide back and cause a secondary impact to it, which has a certain hidden danger of causing damage to it, and it is difficult to stop it steadily and quickly. Utility Model Content
[0003] In view of the above problems, the purpose of the utility model is to provide a new type of coal mining machine limiting device, which can prevent the rebound of the piston rod from causing secondary impact on the coal mining machine, and can also prevent the coal mining machine from sliding back under the rebound force of the piston rod, thereby helping the coal mining machine to stop steadily and quickly.
[0004] To achieve the above purpose, the utility model provides the following technical solutions: a new type of coal mining machine limit device, including a track, both ends of the track are installed with a screw-connected fixing frame, the top of the screw-connected fixing frame is downwardly provided with a slide groove, a sliding seat is slidably installed inside the slide groove, a limit support plate is installed on the top of the sliding seat, a triangular reinforcement plate is connected between the sliding seat and the limit support plate, a first hydraulic buffer is installed on one side of the limit support plate, a piston rod of the first hydraulic buffer passes through the limit support plate and is connected to the collision contact plate, and one side of the screw-connected fixing frame A second hydraulic buffer is installed, and a piston rod of the second hydraulic buffer passes through the threaded fixing frame and is connected to the sliding seat. A fixing sleeve is fixed on the outer side of the piston rods of the first hydraulic buffer and the second hydraulic buffer, and a limiting plate is installed on the bottom of the fixing sleeve. A non-return mechanism is installed on one side of the limiting support plate and the inside of the threaded fixing frame. The non-return mechanism includes a mounting bracket, and a plurality of sets of rotating shafts are rotatably installed on the inner side of the mounting bracket, one end of the rotating shaft is connected to the limiting rotating rod, and a torsion spring is installed on the outer side of the rotating shaft. A coal mining machine body is provided on the top of the track.
[0005] The beneficial effects of the utility model are as follows: when the coal mining machine body contacts the collision contact plate, the first hydraulic buffer contracts and, under the action of the impact force, drives the limit support plate to slide in the slide groove through the sliding seat, and also presses the second hydraulic buffer to make it contract. The buffering capacity of the impact force is effectively improved through the two buffering measures of the first hydraulic buffer and the second hydraulic buffer. As the piston rods of the first hydraulic buffer and the second hydraulic buffer contract, the fixed sleeve and the limit plate are also driven to move. As the limit plate moves, when the limit plate contacts the limit rotating rod, the limit The inclined surface of the plate presses the limit rotating rod to rotate, causing the limit rotating rod to rotate through the rotating shaft, and driving the torsion spring to twist and store force. When the inclined surface of the limit plate passes over the limit rotating rod, the limit rotating rod can be reset under the action of the rebound force of the torsion spring, and the limit plate is hooked and limited to prevent the piston rod from rebounding. There are multiple groups of limit rotating rods. Therefore, no matter how long the piston rod is retracted into the hydraulic buffer cylinder, it can cooperate with the limit rotating rod nearby and hook each other to prevent the piston rod rebound from causing secondary impact on the coal mining machine, and also prevent the coal mining machine from sliding back under the rebound force of the piston rod, helping the coal mining machine to stop steadily and quickly.
[0006] In order to buffer the impact between the collision contact plate and the coal mining machine body:
[0007] As a further improvement of the above technical solution: a rubber pad is installed on one side of the collision contact plate.
[0008] The beneficial effect of this improvement is that the rubber pad plays a role in buffering the impact between the collision contact plate and the coal mining machine body.
[0009] In order to ensure that the limit plate can cooperate and buckle with the limit rotating rod after it passes over the limit rotating rod:
[0010] As a further improvement of the above technical solution: the limiting piece is a right-angled triangle plate, and the bottom of the right-angled triangle plate is rounded.
[0011] The beneficial effect of this improvement is that the limit plate is a right-angled triangle plate, and the bottom of the right-angled triangle plate is rounded. Therefore, when the piston rods of the first hydraulic buffer and the second hydraulic buffer contract under pressure, the limit plate can drive the limit rotating rod to rotate, and after the limit plate passes over the limit rotating rod, it can cooperate and buckle with the limit rotating rod.
[0012] To release the stopper:
[0013] As a further improvement of the above technical solution: a first pulley and a second pulley are further provided on the outer side of the rotating shaft, the first pulley and the second pulley are connected by a belt, and one end of one set of rotating shafts is connected to the crank.
[0014] The beneficial effect of this improvement is: when it is necessary to release the piston rods of the first hydraulic buffer and the second hydraulic buffer, the crank handle is turned, and the crank handle drives the rotating shaft connected to it together with the limiting rotating rod to rotate. While the rotating shaft rotates, the transmission between the first pulley, the belt, and the second pulley drives the other groups of rotating shafts together with the limiting rotating rod to rotate. Therefore, no matter which group of limiting rotating rods the limiting plate is buckled with, it can be released.
[0015] In order to control the power off of the traveling mechanism of the coal mining machine body:
[0016] As a further improvement of the above technical solution: laser sensors are provided at both ends of the coal mining machine body, and control switches are provided above both ends of the coal mining machine body.
[0017] The beneficial effects of this improvement are as follows: the coal mining machine body moves on the track, and the distance between the collision contact plates on the check mechanisms at both ends of the coal mining machine body and the track is monitored in real time by laser sensors. The laser sensor is electrically connected to the control switch, and the trigger distance of the control switch is set. When the coal mining machine body moves until the distance between the collision contact plate and the laser sensor is reduced to the trigger distance, the control switch is automatically triggered, and the power supply of the walking mechanism of the coal mining machine body is cut off, stopping the power output.
[0018] In order to hook and limit the limit piece:
[0019] As a further improvement of the above technical solution: one end of the torsion spring is connected and fixed to the rotating shaft, and the other end of the torsion spring is connected and fixed to the mounting bracket.
[0020] The beneficial effect of this improvement is that the inclined surface of the limit plate presses the limit rotating rod to rotate, causing the limit rotating rod to rotate through the rotating shaft and driving the torsion spring to twist and accumulate force. When the inclined surface of the limit plate passes over the limit rotating rod, the limit rotating rod can be reset under the action of the rebound force of the torsion spring, hooking the limit plate to limit it.
[0021] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the left front partial axonometric structure of the utility model;
[0023] Figure 2 It is a partial axonometric schematic diagram of the utility model;
[0024] Figure 3 It is an axonometric diagram of the non-return mechanism of the utility model;
[0025] Figure 4 It is a schematic diagram of a partial cutaway mechanism of the utility model;
[0026] Figure 5 It is a schematic diagram of the structure of the utility model;
[0027] In the figure: 1. track; 2. screw-connected fixing frame; 3. slide groove; 4. sliding seat; 5. limit support plate; 6. triangular reinforcement plate; 7. first hydraulic buffer; 8. second hydraulic buffer; 9. fixing sleeve; 10. limit plate; 11. mounting bracket; 12. rotating shaft; 13. limit rotating rod; 14. torsion spring; 15. first pulley; 16. second pulley; 17. belt; 18. crank; 19. collision contact plate; 20. rubber pad; 21. coal mining machine body; 22. laser sensor; 23. control switch. DETAILED DESCRIPTION
[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.
[0029] like Figure 1-5 As shown, a novel coal mining machine limiting device comprises a track 1, both ends of the track 1 are installed with a screw-connected fixing frame 2, the top of the screw-connected fixing frame 2 is downwardly opened with a slide groove 3, the inside of the slide groove 3 is slidably installed with a sliding seat 4, the top of the sliding seat 4 is installed with a limiting support plate 5, a triangular reinforcement plate 6 is connected between the sliding seat 4 and the limiting support plate 5, a first hydraulic buffer 7 is installed on one side of the limiting support plate 5, the piston rod of the first hydraulic buffer 7 passes through the limiting support plate 5 and is connected to the collision contact plate 19, a second hydraulic buffer 8 is installed on one side of the screw-connected fixing frame 2, and the first hydraulic buffer 8 is installed on one side of the screw-connected fixing frame 2. The piston rods of the two hydraulic buffers 8 pass through the screw-connected fixing frame 2 and are connected to the sliding seat 4. The outer sides of the piston rods of the first hydraulic buffer 7 and the second hydraulic buffer 8 are sleeved and fixed with a fixing sleeve 9. A limiting plate 10 is installed at the bottom of the fixing sleeve 9. A non-return mechanism is installed on one side of the limiting support plate 5 and the inside of the screw-connected fixing frame 2. The non-return mechanism includes a mounting bracket 11. A plurality of sets of rotating shafts 12 are rotatably installed on the inner side of the mounting bracket 11. One end of the rotating shaft 12 is connected to a limiting rotating rod 13. A torsion spring 14 is installed on the outer side of the rotating shaft 12. A coal mining machine body 21 is provided on the top of the track 1.
[0030] When the coal mining machine body 21 contacts the collision contact plate 19, the first hydraulic buffer 7 contracts, and under the action of the impact force, the limit support plate 5 is driven to slide in the slide groove 3 through the sliding seat 4, and the second hydraulic buffer 8 is also pressed to contract. The buffering capacity of the impact force is effectively improved through the two buffering measures of the first hydraulic buffer 7 and the second hydraulic buffer 8. As the piston rods of the first hydraulic buffer 7 and the second hydraulic buffer 8 contract, the fixed sleeve 9 and the limit plate 10 are also driven to move. As the limit plate 10 moves, when the limit plate 10 contacts the limit rotating rod 13, the inclined surface of the limit plate 10 is pressed. The dynamic limit rotating rod 13 rotates, causing the limit rotating rod 13 to rotate through the rotating shaft 12, and driving the torsion spring 14 to twist and store force. When the inclined surface of the limit plate 10 passes over the limit rotating rod 13, the limit rotating rod 13 can be reset under the action of the rebound force of the torsion spring 14, and the limit plate 10 is hooked and limited to prevent the piston rod from rebounding. The limit rotating rod 13 is provided with multiple groups, so no matter how long the piston rod is retracted into the hydraulic buffer cylinder, it can cooperate with the limit rotating rod 13 nearby to hook each other, so as to prevent the piston rod rebound from causing secondary impact on the coal mining machine, and also to prevent the coal mining machine from sliding back under the rebound force of the piston rod, helping the coal mining machine to stop steadily and quickly.
[0031] A rubber pad 20 is installed on one side of the collision contact plate 19 .
[0032] The rubber pad 20 serves to buffer the impact between the collision contact plate 19 and the coal mining machine body 21 .
[0033] The limiting piece 10 is a right-angled triangle plate, and the bottom of the right-angled triangle plate is rounded.
[0034] The limit plate 10 is a right-angled triangle plate, and the bottom of the right-angled triangle plate is rounded. Therefore, when the piston rods of the first hydraulic buffer 7 and the second hydraulic buffer 8 contract under pressure, the limit plate can drive the limit rotating rod 13 to rotate, and after the limit plate 10 passes over the limit rotating rod 13, it can cooperate and buckle with the limit rotating rod 13.
[0035] A first pulley 15 and a second pulley 16 are also provided on the outer side of the rotating shaft 12 . The first pulley 15 and the second pulley 16 are connected by a belt 17 . One end of one set of the rotating shafts 12 is connected to a crank 18 .
[0036] When it is necessary to release the piston rods of the first hydraulic buffer 7 and the second hydraulic buffer 8, the crank 18 is turned, and the crank 18 drives the rotating shaft 12 connected thereto together with the limiting rotating rod 13 to rotate. While the rotating shaft 12 rotates, the transmission between the first pulley 15, the belt 17, and the second pulley 16 drives the other groups of rotating shafts 12 together with the limiting rotating rod 13 to rotate. Therefore, no matter which group of limiting rotating rods 13 the limiting plate 10 is buckled with, it can be released.
[0037] Laser sensors 22 are provided at both ends of the coal mining machine body 21 , and control switches 23 are provided above both ends of the coal mining machine body 21 .
[0038] The coal mining machine body 21 moves on the track 1, and the distance between the two ends of the coal mining machine body 21 and the collision contact plates 19 on the non-return mechanisms at the two ends of the track 1 is monitored in real time by the laser sensor 22. The laser sensor 22 is electrically connected to the control switch 23, and the trigger distance of the control switch 23 is set. When the coal mining machine body 21 moves until the distance between the collision contact plate 19 and the laser sensor 22 is reduced to the trigger distance, the control switch 23 is automatically triggered, and the power supply of the walking mechanism of the coal mining machine body 21 is controlled to be cut off, and the power output is stopped.
[0039] One end of the torsion spring 14 is connected and fixed to the rotating shaft 12 , and the other end of the torsion spring 14 is connected and fixed to the mounting bracket 11 .
[0040] The inclined surface of the limiting plate 10 presses the limiting rotating rod 13 to rotate, so that the limiting rotating rod 13 rotates through the rotating shaft 12, and drives the torsion spring 14 to twist and store force. When the inclined surface of the limiting plate 10 passes over the limiting rotating rod 13, the limiting rotating rod 13 can be reset under the action of the rebound force of the torsion spring 14, and the limiting plate 10 is hooked and limited.
[0041] The working principle and use process of the utility model are as follows: when the device is used, the coal mining machine body 21 walks on the track 1, and the distance between the two ends of the coal mining machine body 21 and the collision contact plates 19 on the check mechanism at the two ends of the track 1 is monitored in real time by the laser sensor 22. The laser sensor 22 is electrically connected to the control switch 23, and the trigger distance of the control switch 23 is set. When the coal mining machine body 21 walks until the distance between the collision contact plate 19 and the laser sensor 22 is reduced to the trigger distance, the control switch 23 is automatically triggered to control the power off of the walking mechanism of the coal mining machine body 21 and stop the power output. When the coal mining machine body 21 and the collision contact plate 19 are in contact, the control switch 23 is automatically triggered to control the power off of the walking mechanism of the coal mining machine body 21 and stop the power output. When the impact contact plate 19 is contacted, the first hydraulic buffer 7 contracts, and under the action of the impact force, the limiting support plate 5 is driven to slide in the slide groove 3 through the sliding seat 4, and the second hydraulic buffer 8 is also pressed to contract. The buffering capacity of the impact force is effectively improved through the two buffering measures of the first hydraulic buffer 7 and the second hydraulic buffer 8. As the piston rods of the first hydraulic buffer 7 and the second hydraulic buffer 8 contract, the fixed sleeve 9 and the limiting plate 10 are also driven to move. As the limiting plate 10 moves, when the limiting plate 10 contacts the limiting rotating rod 13, the inclined surface of the limiting plate 10 presses the limiting rotating rod 13 to rotate. The limit rotating rod 13 is rotated through the rotating shaft 12, and the torsion spring 14 is driven to twist and store force. When the inclined surface of the limit plate 10 passes over the limit rotating rod 13, the limit rotating rod 13 can be reset under the action of the rebound force of the torsion spring 14, and the limit plate 10 is hooked and limited to prevent the piston rod from rebounding. The limit rotating rod 13 is provided with multiple groups, so no matter how long the piston rod is retracted into the hydraulic buffer cylinder, it can cooperate with the limit rotating rod 13 nearby to hook each other, so as to prevent the piston rod rebound from causing secondary impact on the coal mining machine, and also prevent the coal mining machine from sliding back under the rebound force of the piston rod, so as to help the coal mining machine to stop stably and quickly, and release the first hydraulic When the piston rod of the buffer 7 and the second hydraulic buffer 8 is rotated, the crank 18 is turned, and the crank 18 drives the rotating shaft 12 connected thereto together with the limiting rotating rod 13 to rotate. While the rotating shaft 12 is rotating, the transmission between the first pulley 15, the belt 17 and the second pulley 16 drives the other groups of rotating shafts 12 together with the limiting rotating rod 13 to rotate. Therefore, no matter which group of limiting rotating rods 13 the limiting plate 10 is buckled with, they can be released. When the limiting rotating rod 13 buckled with the limiting plate 10 releases the limit on the limiting plate 10, the piston rods of the first hydraulic buffer 7 and the second hydraulic buffer 8 can be released, driving the collision contact plate 19 to reset.
[0042] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this application does not involve improvements to software and methods.
[0043] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.
[0044] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.
Claims
1. A new type of coal mining machine limit device, characterized in that: The invention comprises a track (1), wherein both ends of the track (1) are provided with a screw-connected fixing frame (2), the top of the screw-connected fixing frame (2) is provided with a sliding groove (3) extending downward, a sliding seat (4) is slidably installed inside the sliding groove (3), a limit support plate (5) is installed on the top of the sliding seat (4), a triangular reinforcing plate (6) is connected between the sliding seat (4) and the limit support plate (5), a first hydraulic buffer (7) is installed on one side of the limit support plate (5), a piston rod of the first hydraulic buffer (7) passes through the limit support plate (5) and is connected to a collision contact plate (19), and a second hydraulic buffer (8) is installed on one side of the screw-connected fixing frame (2), a piston rod of the second hydraulic buffer (8) passes through the screw-connected fixing frame (2) and is connected to the sliding seat (4). The piston rods of the first hydraulic buffer (7) and the second hydraulic buffer (8) are sleeved and fixed with a fixing sleeve (9) on the outside, and a limiting plate (10) is installed at the bottom of the fixing sleeve (9). One side of the limiting support plate (5) and the inside of the screw-connected fixing frame (2) are both installed with a non-return mechanism, and the non-return mechanism includes a mounting bracket (11), and a plurality of groups of rotating shafts (12) are rotatably installed on the inside of the mounting bracket (11), one end of the rotating shaft (12) is connected to the limiting rotating rod (13), and a torsion spring (14) is installed on the outside of the rotating shaft (12). A coal mining machine body (21) is provided on the top of the track (1), one end of the torsion spring (14) is connected and fixed to the rotating shaft (12), and the other end of the torsion spring (14) is connected and fixed to the mounting bracket (11).
2. A new type of coal mining machine limiting device according to claim 1, characterized in that: A rubber pad (20) is installed on one side of the collision contact plate (19).
3. A new type of coal mining machine limiting device according to claim 1, characterized in that: The limiting piece (10) is a right-angled triangle plate, and the bottom of the right-angled triangle plate is rounded.
4. A new type of coal mining machine limiting device according to claim 1, characterized in that: A first pulley (15) and a second pulley (16) are also provided on the outer side of the rotating shaft (12); the first pulley (15) and the second pulley (16) are connected via a belt (17); one end of one set of rotating shafts (12) is connected to a crank (18).
5. A new type of coal mining machine limiting device according to claim 1, characterized in that: Laser sensors (22) are provided at both ends of the coal mining machine body (21), and control switches (23) are provided above both ends of the coal mining machine body (21).