Hard connection device for mining narrow gauge vehicle

Abstract

The utility model belongs to the technical field of coal mine equipment, and particularly relates to a mining narrow gauge vehicle hard connecting device which comprises two connectors, a connecting rod and a connecting assembly, the two connectors are symmetrically arranged and are identical in structure, and each connector comprises a connecting part and a working part; the two ends of the connecting rod are in threaded connection with connecting assemblies. The connecting assembly comprises ball rotating joints in threaded connection with the two ends of the connecting rod and an annular limiting sleeve in threaded connection with part of the inner surface of the connecting hole. The hard connecting device for the mining narrow gauge vehicle is redesigned on the basis of actual use conditions, the hard connecting device has the capability of rotating along a certain deflection angle through the matching of the connecting assembly and the connecting rod in the connector, and the limiting groove is arranged, so that the hard connecting device can rotate along a certain deflection angle on the basis of avoiding collision between the hard connecting device and a mine car body. And the high efficiency of the ball swivel during precise assembly is also considered.

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] The connection devices used between the mine cars in existing coal mines generally adopt a rigid connection. This rigid connection method makes two or more interconnected mine cars, especially when encountering uphill or turning sections, collide and rub with the contact parts of the mine cars because the rigid connection devices cannot rotate flexibly. It is also easy to cause the rigid connection devices to bend or break. In severe cases, it will cause the center of gravity of the mine car to be unstable and roll over.

[0003] Therefore, the Chinese utility model patent with publication number CN220720757U provides a hard connection device that overcomes the problem that the hard connection device of the mine car has poor flexibility and is prone to bending or breaking when the mine car passes through a slope or a turning section. However, when the hard connection device is installed using a connecting assembly, the matching installation process of the ball swivel and the connecting rod requires that the spherical surface at the end of the connecting rod and the ball swivel together form a spherical rotating structure, thereby reducing the wear of the connecting rod and the connecting head and improving the service life. However, in the above-mentioned device, the matching process of the ball swivel and the connecting rod can only be observed by the naked eye to observe the degree of matching, so the matching accuracy is limited; if measuring equipment is used for measurement and installation, the assembly time is greatly increased, seriously affecting work efficiency. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a hard connection device for narrow-gauge mining vehicles, aiming to overcome the problem that the existing hard connection device of mining vehicles has poor flexibility and is prone to bending or breaking when the mining vehicle passes through a slope or a turning section, while also taking into account the high efficiency of the hard connection device during precision assembly.

[0005] Hard connection device for narrow-gauge mining vehicles, including:

[0006] Two connectors are symmetrically provided and have completely the same structure, each of which includes a connecting portion and a working portion that are integrally provided, wherein the connecting portion and the working portion are connected via a set of symmetrically provided transition slopes, a connecting hole is provided on the connecting portion, a mounting hole is provided on the working portion, and the width of the working portion is greater than the diameter of the connecting portion;

[0007] A connecting rod, comprising first threaded portions arranged at both ends of the connecting rod, and a smooth portion between the two first threaded portions, wherein the thread outer diameter of each first threaded portion is smaller than the diameter of the smooth portion, and an annular limiting groove is provided at the connection position between each first threaded portion and the smooth portion along the radial direction of the connecting rod, wherein the inner diameter of the limiting groove is not larger than the thread outer diameter of the first threaded portion, and furthermore, both ends of the connecting rod are threadedly connected with a connecting assembly, and the overall assembly of the hard connection device is realized through the cooperation between the connecting assembly and the connecting hole, and on this basis, both ends of the connecting rod are spherical surfaces;

[0008] A connecting assembly, comprising two ball joints and an annular limiting sleeve threadedly connected to a portion of the inner surface of the connecting hole, wherein the interior of the ball joint is provided with a second threaded portion matched with the first threaded portion, and the length of the second threaded portion is equal to the sum of the length of the first threaded portion and the width of the limiting groove, and when the end of the ball joint abuts against the side wall of the limiting groove, the spherical surface of the end of the connecting rod and the ball joint together form a spherical rotating structure;

[0009] On this basis, the annular limiting sleeve is provided with an arc surface and a conical surface, wherein the arc surface is in direct contact with a portion of the outer surface of the ball swivel, and at the same time, the remaining outer surface of the ball swivel is in contact with the connecting hole, and the angle between the generatrix of the conical surface and the center line of the connecting rod is 6°, thereby forming a limiting cavity inside the annular limiting sleeve to accommodate the movement of the connecting rod;

[0010] In the connection assembly, a plurality of rotation holes are evenly arranged on the side end surface of the annular limiting sleeve along its circumference, and a welding point groove is arranged at the outer edge of the side end surface;

[0011] On this basis, the material of the connecting head, the connecting rod and the connecting assembly are all 42CrMo.

[0012] Preferably, on each of the connectors, the transition slopes are symmetrically arranged on both sides of the working portion, and the angle between the transition slope and the working portion is 135°.

[0013] Furthermore, an oil filling hole is provided on the transition inclined surface, the oil filling hole is communicated with the connecting hole, and the oil filling hole is threadedly connected to an oil filling cover.

[0014] Furthermore, in the connecting rod, an annular oil injection groove is provided at the edge of the spherical surface, and the annular oil injection groove corresponds to the position of the oil injection hole.

[0015] The beneficial effects of the utility model are:

[0016] In general, the utility model redesigns the structure of the hard connection device of the narrow-gauge mining vehicle based on the actual use. In the connector, the connection assembly and the connecting rod inside the connection part make the hard connection device have the ability to rotate in all directions along a certain deflection angle, which solves the problem that the existing connection device has no deflection ability during use and is easy to bend or break after colliding with the mine car body, increases the service life of the device, and also reduces the production cost from the side, reflecting the practicality of the utility model; in addition, the utility model also has a limit groove at the connection position of the first threaded part and the smooth part in the connecting rod, so that when the end of the ball swivel abuts against the side wall of the limit groove, the spherical surface of the end of the connecting rod and the ball swivel together form a spherical rotating structure, which is convenient for the staff to quickly complete the matching connection between the ball swivel and the connecting rod, and increases the service life of the hard connection device while ensuring work efficiency.

[0017] In addition, in the hard connection device, the materials of the connecting head, connecting rod and connecting assembly are all 42CrMo. The hardness and other mechanical properties of 42CrMo are superior to those of 45 steel. The most important thing is that the use of 42CrMo material can extend the service life of the ball swivel that bears tension and the connecting rod that bears tension and shear force. Furthermore, the setting of the welding point groove enables the annular limit sleeve and the connecting head to be welded together in the welding point groove after the hard connection device is assembled, so as to prevent the ball swivel from detaching from the connecting head, and in daily use, lubricating oil is added to the annular oil filling groove in the connecting head through the oil filling hole to provide lubrication effect for the deflection of the hard connection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model;

[0021] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 4 It is a schematic diagram of the matching connection between the connecting rod and the connecting assembly in the utility model. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] The solution provided by the utility model will be described in detail below with reference to the accompanying drawings.

[0026] In this technical solution, if Figure 1-4 As shown, the hard connection device of a narrow-gauge mining vehicle includes a connection head 1, a connection rod 2 and a connection assembly 3.

[0027] like Figure 1-2 As shown, two connectors 1 are symmetrically provided and have completely the same structure. Each connector 1 includes a connecting portion 101 and a working portion 102 that are integrally provided.

[0028] Among them, the connecting part 101 and the working part 102 are transitionally connected through a group of symmetrically arranged transition slopes 103, and a connecting hole 104 is opened on the connecting part 101; a mounting hole 105 is opened on the working part 102 for connecting the connecting head 1 with the mining car body. In addition, the width of the working part 102 is greater than the diameter of the connecting part 101, which improves the strength of the working part 102.

[0029] Based on the above embodiment, on each connector 1, the transition bevel 103 is symmetrically arranged on both sides of the working part 102, and the angle between the transition bevel 103 and the working part 102 is 135°; in addition, an oil filling hole 106 is provided on the transition bevel 103, the oil filling hole 106 is connected to the connecting hole 104, and the oil filling hole 106 is threadedly connected to an oil filling cover.

[0030] At this point, the two connectors 1 under the above structure have beautiful appearance; the oil filling hole 106 is a countersunk hole, and the oil filling cover is completely hidden in the oil filling hole 106 to prevent the oil filling cover from being damaged by bumps during daily work, thereby preventing the lubricating oil from leaking.

[0031] In the present utility model, it is more important that Figure 1-4 As shown, a connecting rod 2 is provided between two symmetrically arranged connecting heads 1, and the connecting rod 2 includes a first threaded portion 202 provided at both ends of the connecting rod 2, and a smooth portion 203 between the two first threaded portions 202, the thread outer diameter of each first threaded portion 202 is smaller than the diameter of the smooth portion 203, and an annular limiting groove 204 is provided at the connection position between each first threaded portion 202 and the smooth portion 203 along the radial direction of the connecting rod 2, and the inner diameter of the limiting groove 204 is not larger than the thread outer diameter of the first threaded portion 202. In addition, both ends of the connecting rod 2 are threadedly connected with a connecting component 3, and the overall assembly of the hard connection device is realized through the cooperation between the connecting component 3 and the connecting hole 104. On this basis, both ends of the connecting rod 2 are spherical surfaces 205.

[0032] like Figure 2-4 As shown, the connection assembly 3 includes two ball swivels 301 and an annular limiting sleeve 302 threadedly connected to a portion of the inner surface of the connection hole 104 .

[0033] The ball swivel 301 has a second threaded portion inside that matches the first threaded portion 202 , and the length of the second threaded portion is equal to the sum of the length of the first threaded portion 202 and the width of the limiting groove 204 .

[0034] Based on the above embodiment, when the end of the ball joint 301 abuts against the side wall of the limiting groove 204, the spherical surface 205 at the end of the connecting rod 2 and the ball joint 301 together form a spherical rotating structure, and the setting of the limiting groove 204 allows the staff to quickly complete the matching connection between the ball joint 301 and the connecting rod 2, thereby increasing the service life of the hard connection device while ensuring work efficiency.

[0035] On this basis, the annular limiting sleeve 302 is provided with an arc surface 305 and a conical surface 306 , wherein the arc surface 305 is in direct contact with a portion of the outer surface of the ball swivel 301 , and the remaining outer surface of the ball swivel 301 is in contact with the connecting hole 104 .

[0036] like Figure 2-4 As shown, on the annular limiting sleeve 302 , the included angle between the generatrix of the conical surface 306 and the center line of the connecting rod 2 is 6°, thereby forming a limiting cavity inside the annular limiting sleeve 302 to accommodate the movement of the connecting rod 2 .

[0037] At this point, the connecting rod 2 has the ability to rotate along a certain deflection angle. At this deflection angle, the hard connection device provided by the utility model can be well applied to curved road sections and slope road sections to prevent the hard connection device from colliding with the mine car.

[0038] In addition, in the present application, the material of all components of the hard connection device is 42CrMo. The hardness and other mechanical properties of 42CrMo are superior to those of 45 steel. Most importantly, during the working process of the ball swivel 301 that bears tension and the connecting rod 2 that bears tension and shear force, the use of 42CrMo material can extend their service life.

[0039] Based on the above embodiments, Figure 4 As shown, an annular oil filling groove 201 is provided at the edge of the spherical surface 205 , and the oil filling groove 201 corresponds to the position of the oil filling hole 106 . In this embodiment, the oil filling groove 201 is used to store lubricating oil.

[0040] A plurality of rotating holes 303 are evenly arranged along the circumference of the side end surface 307 of the limiting sleeve 302. In the present embodiment, after the connecting rod 2 is screwed into the interior of the ball swivel 301, the cooperation between the rotating hole 303 and the wrench is used to screw the limiting sleeve 302 into the interior of the connecting part 101 and cooperate with the connecting hole 104. On this basis, a welding point groove 304 is provided at the outer edge of the side end surface 307, which is used to weld the limiting sleeve 302 and the connecting head 1 into one in the welding point groove 304 after the hard connection device is assembled, so as to prevent the ball swivel 301 from detaching from the connecting head 1.

[0041] Specifically, when the hard connection device for narrow-gauge mining vehicles provided by the utility model is used to connect the mining vehicles, the two limiting sleeves 302 are first symmetrically sleeved on the connecting rod 2, and then the ball joints 301 are respectively threaded at both ends of the connecting rod 2. In this process, the staff does not need to use measuring tools to achieve strict matching between the connecting rod 2 and the ball joint 301. That is, when the staff twists the ball joint 301 until its end abuts against the side wall of the limiting groove 204, the spherical surface 205 at the end of the connecting rod 2 and the ball joint 301 together form a spherical rotating structure. At this time, it is achieved as follows Figure 4In the situation shown, the limiting sleeve 302 is then screwed into the interior of the connecting part 101 and matched with the connecting hole 104 through the cooperation of the wrench and the rotating hole 303, and then the limiting sleeve 302 and the connecting head 1 are welded as a whole in the welding point groove 304 of the limiting sleeve 302, and lubricating oil is injected into the interior of the connecting part 101 through the oil filling hole 106 and the oil filling cover is tightened. At this time, the hard connection device is assembled, and then the rotating shaft is passed through the connecting part and the mounting hole 105 of the mine car body to complete the overall installation of the coal mine car and the hard connection device. The device has a simple structure and a reasonable design, and can effectively increase the working efficiency and work safety rate of the coal mine car.

[0042] 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 narrow-gauge mining vehicles, characterized in that: include: Two connectors are symmetrically provided and have completely the same structure, each of which includes a connecting portion and a working portion that are integrally provided, wherein the connecting portion and the working portion are connected via a set of symmetrically provided transition slopes, a connecting hole is provided on the connecting portion, a mounting hole is provided on the working portion, and the width of the working portion is greater than the diameter of the connecting portion; A connecting rod, comprising first threaded portions arranged at both ends of the connecting rod, and a smooth portion between the two first threaded portions, wherein the thread outer diameter of each first threaded portion is smaller than the diameter of the smooth portion, and an annular limiting groove is provided at the connection position between each first threaded portion and the smooth portion along the radial direction of the connecting rod, wherein the inner diameter of the limiting groove is not larger than the thread outer diameter of the first threaded portion, and furthermore, both ends of the connecting rod are threadedly connected with a connecting assembly, and the overall assembly of the hard connection device is realized through the cooperation between the connecting assembly and the connecting hole, and on this basis, both ends of the connecting rod are spherical surfaces; A connecting assembly, comprising two ball joints and an annular limiting sleeve threadedly connected to a portion of the inner surface of the connecting hole, wherein the interior of the ball joint is provided with a second threaded portion matched with the first threaded portion, and the length of the second threaded portion is equal to the sum of the length of the first threaded portion and the width of the limiting groove, and when the end of the ball joint abuts against the side wall of the limiting groove, the spherical surface of the end of the connecting rod and the ball joint together form a spherical rotating structure; On this basis, the annular limiting sleeve is provided with an arc surface and a conical surface, wherein the arc surface is in direct contact with a portion of the outer surface of the ball swivel, and at the same time, the remaining outer surface of the ball swivel is in contact with the connecting hole, and the angle between the generatrix of the conical surface and the center line of the connecting rod is 6°, thereby forming a limiting cavity inside the annular limiting sleeve to accommodate the movement of the connecting rod; In the connection assembly, a plurality of rotation holes are evenly arranged on the side end surface of the annular limiting sleeve along its circumference, and a welding point groove is arranged at the outer edge of the side end surface; On this basis, the material of the connecting head, the connecting rod and the connecting assembly are all 42CrMo.

2. The hard connection device for narrow-gauge mining vehicles according to claim 1, characterized in that: On each of the connectors, the transition slopes are symmetrically arranged on both sides of the working portion, and the angle between the transition slope and the working portion is 135°.

3. The hard connection device for narrow-gauge mining vehicles according to claim 2, characterized in that: An oil filling hole is arranged on the transition inclined surface, the oil filling hole is communicated with the connecting hole, and the oil filling hole is threadedly connected with an oil filling sealing cap.

4. The hard connection device for narrow-gauge mining vehicles according to claim 3, characterized in that: In the connecting rod, an annular oil injection groove is provided at the edge of the spherical surface, and the annular oil injection groove corresponds to the position of the oil injection hole.

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