Hard connection device for mining narrow gauge vehicle
By adding buffer components to the mine car connection device and using annular limit sleeves, ball rotation joints and other structures, the problem of pulling force or collision when the motion state of the traditional connection device suddenly changes, achieving lower maintenance costs and higher transportation efficiency.
Patent Information
- Application Number
- CN202520706232.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2035-04-15
AI Technical Summary
Traditional mine car connection devices lack buffering function, which leads to huge tension or collisions that occur when the mine car suddenly changes in its motion state, resulting in damage to the connection device, increasing maintenance costs, and occupies space in complex tunnel environments to reduce transportation efficiency.
A hard connection device for mining narrow-gauge vehicles is designed. By adding buffer components to the connection device, using the cooperation of an annular limiting sleeve, ball rotation joint and connecting rod, buffer components and fixed connectors with different structures are set, and springs are used to buffer and absorb kinetic energy between the mine trucks and reduce tension or collision force.
It effectively avoids the connection device being broken or the mine car collided and damaged, reduces maintenance costs, and connects more mine cars in limited roadway distances, improving transportation efficiency.
Smart Images
Figure CN222875988U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coal mine equipment, and in particular relates to a hard connection device for a narrow-gauge vehicle used in a mine. Background Art
[0002] Among the production equipment in coal mines, mine cars are the main equipment that is indispensable in the process of transporting minerals. During the production process, in order to meet the needs of production, mine cars are generally connected into rows through connecting devices, and then connected to traction equipment to meet the efficient transportation of minerals.
[0003] The traditional rail transport mine car body does not have a braking device or a power device. Therefore, when the mine car is going uphill, downhill, or starting, stopping, or other sudden changes in movement state, the speed of the front and rear mine cars will be inconsistent, which will easily lead to huge sudden pulling force or sudden collision between the mine cars. In addition, the traditional connecting device is a rigid connector, which does not have the function of buffering sudden pulling force and collision force. Therefore, the sudden change in the movement state of the mine car will directly cause the connecting device to be pulled off or the rigid collision between the two mine cars, resulting in damage to the connecting device and the mine car body, and increasing production and maintenance costs; in addition, the road routes of coal mines are complicated, and most of them are not long-distance straight-line layouts. The existing mine car connectors occupy more space in the limited roadway distance, which reduces the single coal transportation volume and reduces the transportation efficiency. Utility Model Content
[0004] In view of this, the utility model provides a hard connection device for narrow-gauge mining vehicles. A buffer component is added to the hard connection device, which ensures the flexibility of the hard connection device itself and aims to utilize the buffer component to buffer and absorb the kinetic energy between mining vehicles, reduce pulling force or collision force, avoid device damage, and save maintenance and production costs. In addition, the hard connection device provided by the utility model not only performs kinetic energy buffering and absorption, but also takes into account the problem of reduced efficiency of transportation operations in short-distance tunnels.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0006] A hard connection device for a narrow-gauge mining vehicle is applied to a mining vehicle group, wherein the mining vehicle group includes a plurality of mining vehicle units, and the plurality of mining vehicle units are connected end to end through the hard connection device for a narrow-gauge mining vehicle. The hard connection device for a narrow-gauge mining vehicle includes:
[0007] A fixed connector, comprising a first connector body, wherein the first connector body is provided with a mounting hole for connecting with the mining vehicle unit via a pin shaft;
[0008] A telescopic connector, comprising a second connector body with a limiting assembly, wherein the limiting assembly comprises an annular limiting sleeve and a ball joint arranged inside the second connector body, wherein the annular limiting sleeve is provided with a conical surface and an arc surface, the angle between the generatrix of the conical surface and the center line is 7°-10°, thereby forming a trumpet-shaped limiting cavity inside the annular limiting sleeve, the arc surface is in direct contact with a part of the outer surface of the ball joint, on this basis, a through hole is opened inside the ball joint, and a first threaded portion is provided on the inner circumferential surface of the through hole; and
[0009] A buffer assembly comprises a cylindrical connecting tube, wherein the internal threads at the left and right ends of the connecting tube are connected with a first limit ring and a second limit ring. In addition, the buffer assembly also comprises a sliding block slidably embedded in the connecting tube, wherein the internal threads of the first limit ring are connected with a first connecting rod, and one end of the first connecting rod extends into the interior of the first connector body; the internal sliding connection of the second limit ring is connected with a second connecting rod, one end of the second connecting rod is threadedly connected to the sliding block, and the other end of the second connecting rod extends into the interior of the ball joint and is matched with the first threaded portion; on this basis, the buffer assembly also comprises a first spring, which is located between the second limit ring and the sliding block and is simultaneously covered on the circumferential outer wall of the second connecting rod.
[0010] Preferably, in the telescopic connector, the second connector body includes an integrally arranged connecting portion and a working portion, the connecting portion and the working portion are connected by a group of symmetrically arranged transition slopes, a connecting hole is provided on the connecting portion, the annular limiting sleeve is threadedly connected to a portion of the inner surface of the connecting hole, and on this basis, the remaining outer surface of the ball joint fits with the connecting hole.
[0011] More preferably, in the telescopic connector, a mounting hole is also provided on the working part of the second connector body, and the width of the working part is greater than the diameter of the connecting part. In addition, the transition bevels are symmetrically arranged on both sides of the working part, and the angle between the transition bevel and the working part is 130°-135°.
[0012] Preferably, a plurality of first rotating holes are evenly arranged along the circumference of the first side end face of the annular limiting sleeve, and a welding point groove is arranged at the outer edge of the first side end face; an oil filling hole is arranged on the transition inclined surface, the oil filling hole is connected with the connecting hole, and the oil filling hole is threadedly connected with an oil filling cover.
[0013] Preferably, when the first connector body in the fixed connector and the second connector body in the telescopic connector have the same structure, the buffer assembly also includes a second spring arranged between the first limiting ring and the sliding block, and the second spring is in a free state during installation. In addition, the first spring is also in a free state during installation.
[0014] Preferably, when the first connector body in the fixed connector and the second connector body in the telescopic connector have different structures, in the fixed connector, the first connector body, the first connecting rod and the first limiting ring are integrally formed.
[0015] Furthermore, the free length of the first spring and the second spring is 80 mm, the limit compression amount is 20 mm, and when the second spring is in the limit compression state, the telescopic connector does not interfere with the connecting pipe.
[0016] Furthermore, in the buffer assembly, the end surfaces of the first connecting rod and the second connecting rod extending into the interior of the ball joint are both spherical surfaces, and the first connecting rod and the second connecting rod are both provided with a limiting groove. When the first connecting rod and the second connecting rod are respectively connected with the first threaded portion in the ball joint, the end of the ball joint abuts against the side wall of the limiting groove. At this time, the spherical surfaces of the ends of the first connecting rod and the second connecting rod respectively form a spherical rotating structure with the ball joint.
[0017] On this basis, an annular oil injection groove is provided at the edge of each spherical surface, and the annular oil injection groove corresponds to the position of the oil injection hole.
[0018] Preferably, in the buffer assembly, a plurality of second rotation holes and third rotation holes are evenly arranged along the circumference of the second side end face and the third side end face which are opposite to each other of the first limiting ring and the second limiting ring, and welding point grooves are arranged at the outer edges of the second side end face and the third side end face.
[0019] Furthermore, in the buffer assembly, the free length of the first spring is 100 mm and the ultimate compression amount is 30 mm.
[0020] The beneficial effects of the utility model are:
[0021] Generally speaking, the utility model provides a hard connection device for narrow-gauge mining vehicles, and the hard connection device for narrow-gauge mining vehicles meets the use conditions of different distances between two mining vehicle units. The hard connection device for narrow-gauge mining vehicles utilizes the cooperation of an annular limiting sleeve, a ball swivel and each connecting rod to ensure that the hard connection device has the ability to rotate freely along a certain deflection angle, and buffer components with different structures are respectively arranged between the fixed connecting head and the movable connecting head, and the springs in the buffer components are used to buffer and absorb the kinetic energy between the two mining vehicles, reduce the pulling force or the collision force, avoid the hard connection device from being pulled off or the two mining vehicle bodies from colliding and being damaged, and reduce the production and maintenance costs of the equipment; and the difference in the structures of the two buffer components and the difference in the structures of the fixed connecting head reduces the overall length of the hard connection device for narrow-gauge mining vehicles, so that more mining vehicles can be connected in a limited tunnel distance, and finally the transportation efficiency of the mining vehicles is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a schematic diagram of a specific use state of the utility model;
[0024] Figure 2 A schematic diagram of the overall structure of a hard connection device for a narrow-gauge mining vehicle is provided for Example 1;
[0025] Figure 3 A schematic cross-sectional structure diagram of a hard connection device for a narrow-gauge mining vehicle is provided for Example 1;
[0026] Figure 4 is a specific structural cross-sectional view of the second connector body;
[0027] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;
[0028] Figure 6 It is a schematic diagram of the matching structure of the annular limiting sleeve, the ball swivel, and any connecting rod;
[0029] Figure 7 is a schematic diagram of the three-dimensional structure of the buffer component;
[0030] Figure 8 It is a schematic diagram of the structure of the buffer component from another angle;
[0031] Fig. 9This is a schematic diagram of the overall structure of the hard connection device for a narrow-gauge mining vehicle provided in Example 2;
[0032] Fig.10 This is a schematic cross-sectional view of the hard connection device for a narrow-gauge mining vehicle provided in Example 2;
[0033] In the figure: a mine car group 1, a mine car unit 101; a fixed connector 2, a first connector body 201, a telescopic connector 3, a second connector body 301, a connecting part 302, a working part 303, a transition slope 304, an oil filling hole 305, a connecting hole 306, an annular limiting sleeve 307, a ball joint 308, a conical surface 309, an arc surface 310, a first threaded portion 311, a first side end surface 312, and a first rotating hole 313; a buffer assembly 4, a connecting pipe 401, a first limiting ring 402, a second limiting ring 403, a sliding block 404, a second connecting rod 405, a first connecting rod 406, a first spring 407, a second spring 408, a second side end surface 409, a third side end surface 410, a second rotating hole 411, and a third rotating hole 412; a mounting hole 5; a spherical surface 6, an annular oil filling groove 601; a limiting groove 7; and a welding point groove 8. DETAILED DESCRIPTION
[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0035] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0036] The solution provided by the utility model will be described in detail below with reference to the accompanying drawings.
[0037] like Figure 1 As shown, the hard connection device for narrow-gauge mining vehicles provided by the utility model is applied to a mining vehicle group 1, and the mining vehicle group 1 includes a plurality of mining vehicle units 101, and the plurality of mining vehicle units 101 are connected end to end through the hard connection device for narrow-gauge mining vehicles. The scheme of the hard connection device for narrow-gauge mining vehicles will be specifically described below through two embodiments.
[0038] First embodiment:
[0039] In this technical solution, if Figure 2 As shown, the hard connection device for narrow-gauge mining vehicles includes a fixed connection head 2 and a telescopic connection head 3 of the same structure, and a buffer assembly 4 arranged between the fixed connection head 2 and the telescopic connection head 3, wherein Figure 2-3 As shown, the telescopic connector 3 includes a second connector body 301 with a limit assembly, and the fixed connector 2 includes a first connector body 201. The first connector body 201 is provided with a mounting hole 5 for connecting with the mining car unit 101 through a pin shaft.
[0040] It should be noted that in this embodiment, the first connector body 201 in the fixed connector 2 and the second connector body 301 in the telescopic connector 3 have the same structure. Therefore, when the present application describes the structure and function of the telescopic connector 3 in detail, the specific structure and function of the fixed connector 2 can be obtained.
[0041] Next, the present application will describe the specific structure of the telescopic connector 3 in detail.
[0042] In the telescopic connector 3, a mounting hole 5 is also provided on the second connector body 301 for connecting to the mining car unit 101 through a pin shaft. In addition, the second connector body 301 also includes an integrally arranged connecting portion 302 and a working portion 303. The connecting portion 302 and the working portion 303 are connected by a group of symmetrically arranged transition slopes 304. A connecting hole 306 is provided on the connecting portion 302. The width of the working portion 303 is greater than the diameter of the connecting portion 302, thereby improving the strength of the working portion 303.
[0043] Based on the above embodiment, the transition slope 304 is symmetrically arranged on both sides of the working part 303, and the angle between the transition slope 304 and the working part 303 is 130°-135°; in addition, an oil filling hole 305 is provided on the transition slope 304, and the oil filling hole 305 is connected to the connecting hole 306, and the oil filling hole 305 is threadedly connected to an oil filling cover.
[0044] At this point, the appearance of the telescopic connector 3 under the above structure is beautiful; the oil filling hole 305 is a countersunk hole, and the oil filling cover is completely hidden in the oil filling hole 305, preventing the oil filling cover from being damaged by bumps during daily work, thereby preventing the lubricating oil from leaking.
[0045] In addition, Figure 3-6 As shown, the limiting assembly includes an annular limiting sleeve 307 and a ball joint 308 arranged inside the second connector body 301, wherein the annular limiting sleeve 307 is threadedly connected to a portion of the inner surface of the connecting hole 306, and a conical surface 309 and an arc surface 310 are provided on the annular limiting sleeve 307. The angle between the generatrix of the conical surface 309 and the center line is 7°-10°, thereby forming a trumpet-shaped limiting cavity inside the annular limiting sleeve 307, and the arc surface 310 is in direct contact with a portion of the outer surface of the ball joint 308. At the same time, the remaining outer surface of the ball joint 308 is in contact with the connecting hole 306. On this basis, a through hole is opened inside the ball joint 308, and a first threaded portion 311 is provided on the inner circumferential surface of the through hole.
[0046] It should also be noted that a plurality of first rotation holes 313 are evenly arranged along the circumference of the first side end surface 312 of the annular limiting sleeve 307 , and a welding point groove 8 is arranged at the outer edge of the first side end surface 312 .
[0047] As the core of this application, Figure 3 As shown, the buffer assembly 4 includes a connecting tube 401 which is cylindrical in shape as a whole, and the internal threads at the left and right ends of the connecting tube 401 are connected with a first limiting ring 402 and a second limiting ring 403. The buffer assembly 4 also includes a sliding block 404 which is slidably embedded in the connecting tube 401, wherein the second limiting ring 403 is internally slidably connected with a second connecting rod 405, one end of the second connecting rod 405 is threadedly connected to the sliding block 404, and the other end of the second connecting rod 405 extends into the ball joint 30 in the second connector body 301. 8, and is connected with the first threaded portion 311; the internal thread of the first limiting ring 402 is connected with the first connecting rod 406, and one end of the first connecting rod 406 extends into the interior of the first connecting head 201. Since the first connecting head body 201 in the fixed connecting head 2 and the second connecting head body 301 in the telescopic connecting head 3 have the same structure, the matching connection method of the first connecting rod 406 and the first connecting head body 201 is the same as the matching connection method of the second connecting rod 405 and the second connecting head body 301.
[0048] On this basis, the buffer assembly 4 also includes a first spring 407 arranged inside the connecting tube 401, the first spring 407 is located between the sliding block 404 and the second limiting ring 403 and is simultaneously covered on the circumferential outer wall of the second connecting rod 405, and the first spring 407 is in a free state when installed; in this embodiment, the buffer assembly 4 also includes a second spring 408 arranged between the first limiting ring 402 and the sliding block 404, and the second spring 408 is also in a free state when installed. The specific structure is as follows Figure 3 As shown; in addition, the free length of the first spring 407 and the second spring 408 is 80 mm, the limit compression amount is 20 mm, and when the second spring 408 is in the limit compression state, the telescopic connector 3 does not interfere with the connecting tube 401.
[0049] At this point, as the buffer assembly 4 is connected to the fixed connector 2 and the telescopic connector 3 respectively by means of the first connecting rod 406 and the second connecting rod 405, the overall structure of the hard connection device for narrow-gauge mining vehicles provided in this embodiment is formed, and the configuration of the first spring 407 and the second spring 408 enables the hard connection device for narrow-gauge mining vehicles to absorb the kinetic energy from the two mining car units 101 approaching or moving away from each other when in use, thereby preventing the hard connection device for narrow-gauge mining vehicles from being broken by a huge sudden pulling force when the two mining car units 101 move away from each other, and at the same time preventing the two mining car units 101 from colliding and causing damage to the equipment.
[0050] It should be noted here that, in addition to the above structure, the coordinated installation of the hard connection device for the narrow-gauge mining vehicle also requires the adaptive setting of some structures on its body, and the specific setting method is as follows:
[0051] like Figure 4-6 As shown, in the hard connection device of the narrow-gauge mining vehicle, the end faces of the first connecting rod 406 and the second connecting rod 405 extending into the interior of the ball joint 308 are both spherical surfaces 6, and the first connecting rod 406 and the second connecting rod 405 are both provided with a limiting groove 7. When the first connecting rod 406 and the second connecting rod 405 are respectively connected with the first threaded portion 311 in the ball joint 308, the end of the ball joint 308 abuts against the side wall of the limiting groove 7. At this time, the spherical surfaces 6 at the ends of the first connecting rod 406 and the second connecting rod 405 respectively form a spherical rotating structure with the ball joint 308.
[0052] Based on the above embodiment, the spherical structure generated by the cooperation between the spherical surface 6 and the ball joint 308 provides a structural basis for the free rotation of the first connecting rod 406 and the second connecting rod 405 in the limiting cavity, and the setting of the limiting groove 7 allows the staff to quickly complete the cooperation and connection between the ball joint 308 and the first connecting rod 406 and the second connecting rod 405, thereby increasing the service life of the hard connection device while ensuring work efficiency. On this basis, an annular oil filling groove 601 is provided at the edge position of each spherical surface 6, and the annular oil filling groove 601 corresponds to the position of the oil filling hole 305 and is used to store lubricating oil.
[0053] In addition, if Figure 7-8 As shown, in the buffer assembly 4 of the hard connection device of the narrow-gauge mining vehicle provided in the present embodiment, a plurality of second rotation holes 411 and third rotation holes 412 are evenly arranged along the circumference on the second side end face 409 and the third side end face 410 which are opposite to each other from the first limiting ring 402 and the second limiting ring 403, and welding point grooves 8 are arranged at the outer edges of the second side end face 409 and the third side end face 410.
[0054] So far, Figure 3 Taking the position shown as an example, when the hard connection device for narrow-gauge mining vehicles provided in this embodiment is fully assembled, the second limiting ring 403 is firstly threadedly connected to the right port of the connecting pipe 401 with the assistance of the third rotating hole 412, and then the first spring 407 is inserted into the connecting pipe 401 from the left side thereof until one end of the first spring 407 abuts against the second limiting ring 403; then, on the basis of the second connecting rod 405 being connected with the sliding block 404, the second connecting rod 405 is extended into the connecting pipe 401, and the end of the second connecting rod 405 passes through the first spring 407 and the second limiting ring 403 in sequence. 03 and then extend it to the outside of the connecting pipe 401; then, the second spring 408 is inserted into the connecting pipe 401 from the left side thereof until one end of the second spring 408 abuts against the sliding block 404; then, on the basis of the coordinated connection between the first connecting rod 406 and the first limiting ring 402, the first limiting ring 402 is threadedly connected to the left port of the connecting pipe 401 through the auxiliary action of the second rotating hole 411, and then, the first limiting ring 402 and the second limiting ring 403 are respectively welded to the connecting pipe 401 as a whole in the welding point groove 8 of the first limiting ring 402 and the second limiting ring 403 to complete the coordinated installation of the buffer assembly 4.
[0055] On this basis, for the coordinated installation of the buffer assembly 4 with the fixed connector 2 and the telescopic connector 3, the two annular limiting sleeves 307 are first symmetrically sleeved on the first connecting rod 406 and the second connecting rod 405, respectively, and then the ball joints 308 are threadedly connected to the ends of the first connecting rod 406 and the second connecting rod 405, respectively. When the staff twists the ball joint 308 until its end abuts against the side wall of the limiting groove 7, the spherical surfaces 6 at the ends of the first connecting rod 406 and the second connecting rod 405 and the ball joint 308 together form a spherical rotating structure, achieving the following effect: Figure 6 In the structural state shown, the annular limiting sleeve 307 is then screwed into the interior of the connecting part 302 and matched with the connecting hole 306 through the cooperation of the wrench and the first rotating hole 313, and then the annular limiting sleeve 307 is welded together with the first connector body 201 and the second connector body 301 in the welding point groove 8 of the annular limiting sleeve 307, and lubricating oil is injected into the interior of the connecting part 302 through the oil filling hole 305 and the oil filling cover is tightened. At this time, the hard connection device is assembled, and then the pin shaft is passed through the connecting part and the mounting hole 5 of the mine car unit 101, so as to complete the overall installation of the mine car unit 101 and the hard connection device of the mining narrow-gauge vehicle.
[0056] Second embodiment:
[0057] In a preferred embodiment, the utility model provides a hard connection device for narrow-gauge mining vehicles in the case where the distance between the two mining vehicle units 101 is short, such as Fig. 9 As shown, the hard connection device of the narrow-gauge mining vehicle also includes a fixed connector 2, a telescopic connector 3 and a buffer assembly 4 arranged between the fixed connector 2 and the telescopic connector 3, but at this time the first connector body 201 in the fixed connector 2 and the second connector body 301 in the telescopic connector 3 have different structures.
[0058] like Figure 9-10 As shown, in the fixed connector 2, the first connector body 201, the first connecting rod 406 and the first limiting ring 402 are integrally formed, and in the buffer assembly 4, the free length of the first spring 407 is 100 mm and the limit compression amount is 30 mm. When the first spring 407 is in a free state, the telescopic connector 3 does not interfere with the connecting pipe 401. At this time, the sliding block 404 abuts against the first limiting ring 402. The specific structure is as follows Fig.10 shown.
[0059] At this point, the hard connection device for narrow-gauge mining vehicles provided in this embodiment also utilizes the buffer component 4 to absorb the kinetic energy from the two mining car units 101 approaching or moving away from each other, thereby preventing the huge sudden pulling force from breaking the hard connection device for narrow-gauge mining vehicles when the two mining car units 101 move away from each other, and preventing the two mining car units 101 from colliding and causing damage to the equipment. In addition, fixed connecting heads 2 and buffer components 4 with different structures are used to reduce the overall length of the hard connection device for narrow-gauge mining vehicles, so that more mining cars can be connected in a limited tunnel distance, thereby ultimately improving the transportation efficiency of the mining cars.
[0060] In the technical solution, in the hard connection device for narrow-gauge mining vehicles provided by the utility model, the material of the first spring 407 and the second spring 408 is 60Si2MnA, and except for the first spring 407 and the second spring 408, the material of the remaining components is 42CrMo.
[0061] Specifically, the hard connection device for narrow-gauge mining vehicles provided in the present application meets the operating conditions of different distances between two mining car units 101. The hard connection device for narrow-gauge mining vehicles utilizes the cooperation of the annular limiting sleeve 307, the ball joint 308 and each connecting rod to ensure that each connecting rod has the ability to rotate freely along a certain deflection angle. On the basis of the structural differences of the fixed connecting head 2, buffer components 4 with different structures are respectively arranged between the fixed connecting head 2 and the telescopic connecting head 3, and the springs in the buffer component 4 are used to buffer and absorb the kinetic energy between the two mining car units 101, reduce the pulling force or collision force, avoid the hard connection device for narrow-gauge mining vehicles being pulled apart or the two mining car units 101 being damaged by collision, and reduce the production and maintenance costs of the equipment; and the difference in the structures of the two buffer components 4 and the fixed connecting head 2 reduces the overall length of the hard connection device for narrow-gauge mining vehicles, so that more mining cars can be connected in a limited tunnel distance, and ultimately the transportation efficiency of the mining cars is improved.
[0062] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A hard connection device for a narrow-gauge mining vehicle, applied to a mining vehicle group, wherein the mining vehicle group includes a plurality of mining vehicle units, and the plurality of mining vehicle units are connected end to end through the hard connection device for a narrow-gauge mining vehicle, characterized in that: The hard connection device for narrow-gauge mining vehicles comprises: A fixed connector, comprising a first connector body, wherein the first connector body is provided with a mounting hole for connecting with the mining vehicle unit via a pin shaft; A telescopic connector, comprising a second connector body with a limiting assembly, wherein the limiting assembly comprises an annular limiting sleeve and a ball joint arranged inside the second connector body, wherein the annular limiting sleeve is provided with a conical surface and an arc surface, the angle between the generatrix of the conical surface and the center line is 7°-10°, thereby forming a trumpet-shaped limiting cavity inside the annular limiting sleeve, the arc surface is in direct contact with a part of the outer surface of the ball joint, on this basis, a through hole is opened inside the ball joint, and a first threaded portion is provided on the inner circumferential surface of the through hole; and A buffer assembly comprises a cylindrical connecting tube, wherein the internal threads at the left and right ends of the connecting tube are connected with a first limit ring and a second limit ring. In addition, the buffer assembly also comprises a sliding block slidably embedded in the connecting tube, wherein the internal threads of the first limit ring are connected with a first connecting rod, and one end of the first connecting rod extends into the interior of the first connector body; the internal sliding connection of the second limit ring is connected with a second connecting rod, one end of the second connecting rod is threadedly connected to the sliding block, and the other end of the second connecting rod extends into the interior of the ball joint and is matched with the first threaded portion; on this basis, the buffer assembly also comprises a first spring, which is located between the second limit ring and the sliding block and is simultaneously covered on the circumferential outer wall of the second connecting rod.
2. The hard connection device for narrow-gauge mining vehicles according to claim 1, characterized in that: In the telescopic connecting head, the second connecting head body includes an integrally arranged connecting part and a working part, the connecting part and the working part are connected by a group of symmetrically arranged transition inclined surfaces, a connecting hole is opened on the connecting part, the annular limiting sleeve is threadedly connected to a part of the inner surface of the connecting hole, and on this basis, the remaining outer surface of the ball joint fits with the connecting hole.
3. The hard connection device for narrow-gauge mining vehicles according to claim 2, characterized in that: In the telescopic connector, a mounting hole is also provided on the working part of the second connector body, and the width of the working part is greater than the diameter of the connecting part. In addition, the transition bevels are symmetrically arranged on both sides of the working part, and the angle between the transition bevel and the working part is 130°-135°.
4. The hard connection device for narrow-gauge mining vehicles according to claim 3, characterized in that: A plurality of first rotating holes are evenly arranged along the circumference of the first side end surface of the annular limiting sleeve, and a welding point groove is arranged at the outer edge of the first side end surface; an oil filling hole is arranged on the transition inclined surface, the oil filling hole is connected with the connecting hole, and the oil filling hole is threadedly connected with an oil filling cover.
5. The hard connection device for narrow-gauge mining vehicles according to claim 4, characterized in that: When the first connector body in the fixed connector and the second connector body in the telescopic connector have the same structure, the buffer assembly also includes a second spring arranged between the first limiting ring and the sliding block, and the second spring is in a free state during installation. In addition, the first spring is also in a free state during installation.
6. The hard connection device for narrow-gauge mining vehicles according to claim 4, characterized in that: When the first connector body in the fixed connector and the second connector body in the telescopic connector have different structures, in the fixed connector, the first connector body, the first connecting rod and the first limiting ring are integrally formed.
7. The hard connection device for narrow-gauge mining vehicles according to claim 5, characterized in that: The free length of the first spring and the second spring is 80 mm, the limit compression amount is 20 mm, and when the second spring is in the limit compression state, the telescopic connector does not interfere with the connecting pipe.
8. The hard connection device for narrow-gauge mining vehicles according to claim 7, characterized in that: In the buffer assembly, the end surfaces of the first connecting rod and the second connecting rod extending into the interior of the ball joint are both spherical surfaces, and the first connecting rod and the second connecting rod are both provided with limiting grooves. When the first connecting rod and the second connecting rod are respectively connected with the first threaded portion in the ball joint, the end of the ball joint abuts against the side wall of the limiting groove. At this time, the spherical surfaces of the ends of the first connecting rod and the second connecting rod respectively form a spherical rotating structure with the ball joint. On this basis, an annular oil injection groove is provided at the edge of each spherical surface, and the annular oil injection groove corresponds to the position of the oil injection hole.
9. The hard connection device for narrow-gauge mining vehicles according to claim 8, characterized in that: In the buffer assembly, a plurality of second rotation holes and third rotation holes are evenly arranged along the circumference of the second side end faces and the third side end faces which are opposite to each other of the first limiting ring and the second limiting ring, and welding point grooves are arranged at the outer edges of the second side end faces and the third side end faces.
10. The hard connection device for narrow-gauge mining vehicles according to claim 6, characterized in that: In the buffer assembly, the free length of the first spring is 100 mm and the limit compression amount is 30 mm.