Automatic speed limiter for mine car

Abstract

The application discloses an automatic speed limiting device for a mine car, which comprises a guiding mechanism, a speed limiting mechanism and a control mechanism. The guiding mechanism comprises two outer supporting rails arranged in parallel and inner limiting rails symmetrically arranged on the inner sides of the two outer supporting rails. The outer supporting rails support the wheels on both sides of the mine car in the vertical direction. The guiding gap matched with the flash of the wheels is formed by the cooperation of the outer supporting rails and the inner limiting rails on the same side. The speed limiting mechanism comprises linear moving elements capable of being controlled to approach or move away from the two inner limiting rails on the inner sides of the two inner limiting rails in a relative synchronization. The control mechanism comprises a weighing sensor and a control box. The weighing sensor is located upstream of the speed limiting mechanism. The control box is configured to control the moving amount of the linear moving elements after obtaining the weight of the mine car measured by the weighing sensor, so as to synchronously adjust the guiding gaps on both sides, and then the speed of the mine car can be limited based on the mass of the mine car, thereby solving the problem that the mine cars with different masses cannot be uniformly limited in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of mining car equipment technology, and in particular to an automatic speed limiting device for mining cars. Background Technology

[0002] In the field of coal mining machinery, during the transportation process of mine transport vehicles, it is necessary to limit the speed of the mine cars when going downhill or when they are about to reach their destination, in order to ensure the safe operation of the mine cars.

[0003] In the existing technology, the speed limiting mechanism for mining cars has the defect of a single speed limiting capability. It cannot uniformly limit the speed of mining cars of different masses. There are two situations: when limiting the speed of mining cars with larger masses, the speed limiting effect is poor, and it is difficult to limit the speed to a safe speed; while for mining cars with smaller masses, there is a situation of excessive speed limiting, making it difficult to operate in place. Utility Model Content

[0004] This application provides an automatic speed limiting device for mining trucks, which can limit the speed based on the weight of the mining truck, thereby solving the problem in the prior art that mining trucks of different weights cannot be uniformly limited in speed.

[0005] This application provides an automatic speed limiting device for mine cars, including: The guiding mechanism includes two parallel outer support rails and inner limiting rails symmetrically distributed on the inner sides of the two outer support rails. The outer support rails vertically support the wheels on both sides of the mine car. The cooperation between the outer support rails and the inner limiting rails on the same side forms a guiding gap that cooperates with the burrs of the wheels. A speed limiting mechanism, comprising a linear moving element that can be controlled to move relatively synchronously and vertically toward or away from the two inner limit rails from the inner side of the two inner limit rails. The control mechanism includes a weighing sensor and a control box, wherein the weighing sensor is located upstream of the speed limiting mechanism, and the control box is configured to: after acquiring the weight of the mine car weighed by the weighing sensor, control the movement of the linear motion element to synchronously adjust the guide gap on both sides.

[0006] In one possible implementation, the outer support rail is a steel rail.

[0007] In one possible implementation, a base frame is provided between the two inner limiting rails. The base frame includes a base plate and fixed plates symmetrically arranged at both ends of the base plate. The fixed plates extend vertically and have guide channels. A limiting screw is slidably arranged in the guide channels. A limiting cap is screwed to the inner protruding end of the limiting screw, and the outer protruding end of the limiting screw is vertically connected to the inner limiting rails on both sides.

[0008] In one possible implementation, the control mechanism further includes a hydraulic station, and the speed limiting mechanism further includes a cylinder extending in a predetermined direction, the extension direction of which is perpendicular to the extension direction of the inner limit rail. Cylinder heads are symmetrically arranged at both ends of the cylinder, and pistons are symmetrically arranged inside the cylinder. A piston rod is vertically connected to each piston, and the piston rod extends vertically through the cylinder head to the outside of the cylinder. A pressure chamber is formed between the two pistons inside the cylinder, and a breathing chamber is formed between the piston and the cylinder head inside the cylinder. The control box controls the two pistons to move synchronously within the cylinder through the hydraulic station, and the two piston rods constitute the linear motion element.

[0009] In one possible implementation, a buffer block is connected to the outer end of the piston rod.

[0010] In one possible implementation, there are multiple speed limiting mechanisms, and the multiple speed limiting mechanisms are spaced apart along the extension direction of the inner limiting rail.

[0011] In one possible implementation, the control mechanism further includes a speed sensor located upstream of the speed limiting mechanism and signal-connected to the control box.

[0012] Beneficial effects: Compared with the prior art, the automatic speed limiting device for mine cars provided in this application can flexibly adjust the movement of the linear moving element and the position of the inner limit rail according to the mass of the mine car weighed by the weighing sensor through the cooperation of the speed limiting mechanism and the control mechanism, thereby adjusting the size of the guide gap and achieving the purpose of flexible speed limiting. For mine cars with larger mass, the squeezing force of the linear moving element on the inner limit rail is slightly larger, which can ensure that the speed of the large-mass mine car is limited to a safe speed. For mine cars with smaller mass, the squeezing force of the linear moving element on the inner limit rail is slightly smaller, which can prevent the mine car from being difficult to move to the position due to excessive speed limiting, making it more convenient to use.

[0013] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0014] Figure 1 A schematic diagram of the automatic speed limiting device for mine cars in this application is shown.

[0015] Figure 2 This application shows Figure 1 A cross-sectional view of the structure of the mine car in the AA direction.

[0016] Figure 3 This application shows Figure 1 Schematic diagram of the cross-sectional structure along the BB direction. Detailed Implementation

[0017] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0018] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0019] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0020] refer to Figures 1 to 3 This application provides an automatic speed limiting device for a mining car, including a guiding mechanism, a speed limiting mechanism, and a control mechanism. The guiding mechanism includes two parallel outer support rails 11 and inner limiting rails 12 symmetrically distributed on the inner sides of the two outer support rails 11. The outer support rails 11 vertically support the wheels 21 on both sides of the mining car 20. The outer support rails 11 are preferably steel rails, providing high structural strength and good support stability. The cooperation between the outer support rails 11 and the inner limiting rails 12 on the same side forms a guide gap 101 that engages with the flanges 22 of the wheels 21, providing guidance for the wheels 21 of the mining car 20. During the movement of the mining car 20, the flanges 22 of the wheels 21 will, to a certain extent, compress inwards against the inner limiting rails 12.

[0021] The speed limiting mechanism 30 includes a linear moving element that can be controlled to move relatively synchronously and vertically toward or away from the two inner limit rails 12, inside the two inner limit rails 12.

[0022] The control mechanism includes a weighing sensor 41 and a control box 42, wherein the weighing sensor 41 is located upstream of the speed limiting mechanism 30, and the control box 42 is configured to: after obtaining the weight of the mine car 20 weighed by the weighing sensor 41, control the movement of the linear moving element to synchronously adjust the guide gap 101 on both sides. For example, when the weight sensor 41 weighs a large mass of the mine car 20, the control box 42 controls the linear movement element to extend outward and further squeeze the inner limit rail 12 to simultaneously reduce the guide gap 101 on both sides. This can apply a greater speed-limiting squeezing force to the wheel 21 and edge 22 of the mine car 20, forcing the mine car 20 to decelerate faster and slow down to a safe speed within the predetermined travel distance. For example, when the weight of the mine car 20 weighed by the weighing sensor 41 is small, the control box 42 controls the linear movement element to retract inward, simultaneously increasing the guide gap 101 on both sides, which can reduce the speed-limiting pressure on the wheels 21 of the mine car 20, allowing the mine car 20 to operate normally in place; while if the weight of the mine car 20 weighed by the weighing sensor 41 is within a suitable range, the control box 42 can remain inactive, maintaining the existing guide gap 101 size.

[0023] Therefore, the automatic speed limiting device for mining cars provided in this application can flexibly adjust the size of the guide gap 101 according to the size of the mining car's mass, thereby applying different speed limiting forces to the mining car 20, which can effectively solve the problem in the prior art that the speed cannot be uniformly limited for mining cars 20 of different masses.

[0024] In one embodiment, a base frame 13 is provided between the two inner limiting rails 12. The base frame 13 includes a base plate 131 and fixed plates 132 symmetrically arranged at the front and rear ends of the base plate 131. The fixed plates 132 extend vertically and have guide channels. A limiting screw 133 is slidably fitted in the guide channels. The inner protruding end of the limiting screw 133 is screwed with a limiting cap 134, and the outer protruding end of the limiting screw 133 is perpendicularly connected to the inner limiting rails 12 on both sides. Thus, in the direction in which the inner limiting rails 12 move inward, the limiting screw 133 will not function. However, in the direction in which the inner limiting rails 12 move outward (i.e., towards the outer support rail 11), the limiting screw 133 will play a limit position limiting role, which can prevent the inner limiting rails 12 from getting too close to the outer support rail 11 and making it difficult for the mine car 20 to smoothly enter the guide gap 101. In the extension direction of the inner limiting rail 12, the guide channels on the fixing plate 132 are preferably evenly distributed in multiple ways, so that the inner limiting rail 12 can be connected and fixed within the entire extension range of the inner limiting rail 12, thereby improving the structural stability of the inner limiting rail 12.

[0025] In one embodiment, the control mechanism further includes a hydraulic station 43. The speed limiting mechanism 30 also includes a cylinder 31 extending in a predetermined direction, wherein the extending direction of the cylinder 31 is perpendicular to the extending direction of the inner limiting rail 12. Cylinder heads 32 are symmetrically arranged at both ends of the cylinder 31, and pistons 33 are symmetrically arranged inside the cylinder 31. A piston rod 34 is vertically connected to each piston 33, wherein the piston rod 34 vertically passes through the cylinder head 32 and extends to the outside of the cylinder 31. A pressure chamber 301 is formed between the two pistons 33 inside the cylinder 31. A breathing chamber 302 is formed between the pistons 33 and the cylinder head 32 inside the cylinder 31. The control box 42 controls the two pistons 33 to move synchronously within the cylinder 31 via the hydraulic station 43. The two piston rods 34 constitute the linear motion element. When the weight of the mine car 20 is large, the control box 42 controls the hydraulic station 43 to work, applying pressure to the pressure chamber 301, causing the pistons 33 at both ends to simultaneously squeeze the breathing chamber 302 and move outward, thereby driving the piston rod 34 to move outward, squeezing the inner limit rail 12 and reducing the guide gap 101. When the weight of the mine car 20 is small, the above process is reversed, which will not be described here. The cooperation of the hydraulic station 43, piston 33 and piston rod 34 can provide a strong and stable driving force to ensure the stability of the guide gap 101.

[0026] In one embodiment, a buffer block 35 is connected to the outer end of the piston rod 34. This not only increases the contact area between the piston rod 34 and the inner limit rail 12, making the force application more uniform, but also allows the buffer block 35, as a consumable part, to be flexibly and conveniently replaced when the accuracy is reduced or damaged, thus ensuring the driving accuracy.

[0027] In one embodiment, there are multiple speed limiting mechanisms 30, and the multiple speed limiting mechanisms 30 are distributed at intervals along the extension direction of the inner limiting rail 12, so that the inner limiting rail 12 can be simultaneously subjected to compressive force at multiple points, which can ensure the stability of the guide gap 101.

[0028] Considering that mining cars 20 of different masses will generate different impact forces at different speeds, and that in some cases the mining cars 20 may be manually pushed, resulting in different travel speeds, controlling the movement of the linear motion element solely based on the mass of the mining car 20 may lead to inaccurate speed limiting. Therefore, the control mechanism also includes a speed sensor 44, which is located upstream of the speed limiting mechanism 30 and is signal-connected to the control box 42. This allows for a comprehensive judgment of the movement of the linear motion element based on both the mass and speed of the mining car 20, ensuring that the mining car 20 can be limited to a safe speed while still reaching its designated position. The specific strategy for this comprehensive judgment can be flexibly designed based on the actual working conditions and experience of different enterprises, and is not limited here.

[0029] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. An automatic speed limiting device for mine cars, characterized in that, include: The guiding mechanism includes two parallel outer support rails and inner limiting rails symmetrically distributed on the inner sides of the two outer support rails. The outer support rails vertically support the wheels on both sides of the mine car. The cooperation between the outer support rails and the inner limiting rails on the same side forms a guiding gap that cooperates with the burrs of the wheels. A speed limiting mechanism, comprising a linear moving element that can be controlled to move relatively synchronously and vertically toward or away from the two inner limit rails from the inner side of the two inner limit rails. The control mechanism includes a weighing sensor and a control box, wherein the weighing sensor is located upstream of the speed limiting mechanism, and the control box is configured to: after acquiring the weight of the mine car weighed by the weighing sensor, control the movement of the linear motion element to synchronously adjust the guide gap on both sides.

2. The automatic speed limiting device for mine cars as described in claim 1, characterized in that, The external support rail is a steel rail.

3. The automatic speed limiting device for mine cars as described in claim 1, characterized in that, A base frame is provided between the two inner limiting rails. The base frame includes a base plate and fixed plates symmetrically arranged at both ends of the base plate. The fixed plates extend vertically and have guide channels. A limiting screw is slidably arranged in the guide channels. A limiting cap is screwed to the inner protruding end of the limiting screw, and the outer protruding end of the limiting screw is vertically connected to the inner limiting rails on both sides.

4. The automatic speed limiting device for mine cars as described in claim 3, characterized in that, The control mechanism further includes a hydraulic station, and the speed limiting mechanism further includes a cylinder extending in a predetermined direction. The extension direction of the cylinder is perpendicular to the extension direction of the inner limit rail. Cylinder heads are symmetrically arranged at both ends of the cylinder, and pistons are symmetrically arranged inside the cylinder. A piston rod is vertically connected to the piston, and the piston rod extends vertically through the cylinder head to the outside of the cylinder. A pressure chamber is formed between the two pistons inside the cylinder, and a breathing chamber is formed between the piston and the cylinder head inside the cylinder. The control box controls the two pistons to move synchronously inside the cylinder through the hydraulic station, and the two piston rods constitute the linear motion element.

5. The automatic speed limiting device for mine cars as described in claim 4, characterized in that, A buffer block is connected to the outer end of the piston rod.

6. The automatic speed limiting device for mine cars as described in claim 4, characterized in that, The speed limiting mechanism is multiple, and the multiple speed limiting mechanisms are distributed at intervals along the extension direction of the inner limiting rail.

7. The automatic speed limiting device for mine cars as described in claim 1, characterized in that, The control mechanism also includes a speed sensor, which is located upstream of the speed limiting mechanism and is signal-connected to the control box.

Images