Coal machine walking distance measuring device

Abstract

The utility model provides a coal machine walking distance measuring device which is characterized in that an anti-explosion encoder assembly comprises an anti-explosion shell and an encoder, the encoder is arranged in the anti-explosion shell, and a transmission shaft of the encoder extends out of the anti-explosion shell; the encoder mounting bracket comprises a connecting plate and an extension part, a mounting hole and a connecting hole are formed in the connecting plate, and the connecting plate and the mounting hole are used for being connected with a coal mining machine mounting box body; one end of the extension part is fixed with the connecting plate, the other end of the extension part is fixed with the encoder, a through hole for a transmission shaft of the encoder to penetrate through is formed in the extension part, and the through hole directly faces the connecting hole of the encoder mounting bracket; the coupler assembly comprises a coupler and a connecting shaft, the overall connecting length of the coupler and the connecting shaft is adjustable, one end of the coupler is used for being connected with a transmission shaft of the encoder, and the connecting shaft is used for being connected with a transmission shaft of the coal mining machine. The device has the advantages that the device is suitable for old coal mining machine transformation, distance measurement positioning precision is improved, and transmission safety is not affected.

Description

Technical Field

[0001] The utility model relates to a coal mining working face measuring device, in particular to a coal mining machine traveling distance measuring device. Background Art

[0002] Currently, older shearers rely on infrared sensors to locate themselves within the coal face. Specifically, each hydraulic support is equipped with an infrared receiver, and the shearer is equipped with an infrared transmitter. As the shearer moves, the infrared receiver on a specific support receives a signal, and the shearer's position is determined by the support number.

[0003] However, this approach has the following problems:

[0004] 1. Generally, the width of the hydraulic support underground exceeds 1.5 meters. Therefore, the minimum error of the position detection of this type of coal mining machine is 1.5 meters, which affects the detection accuracy.

[0005] 2. In the original plan, each hydraulic support needed to be installed with an infrared receiver, which needed to be replaced and maintained regularly, and the corresponding signal lines and power lines needed to be connected. This was costly, labor-intensive, and difficult to maintain.

[0006] 3. The infrared sensor positioning system is difficult to maintain. It is almost impossible to operate during the calibration process, posing a safety risk.

[0007] At present, some manufacturers use encoders to measure the distance and position the coal mining machines, but they are generally based on newly designed coal mining machines. They can be redesigned on the transmission shaft of the coal mining machine. However, the coal mining industry has been developed for a long time. Due to the large size and high cost of old equipment, they are often put into use again through repeated repairs, and the elimination rate is very low. The old coal mining machines have very little space reserved in the end cover design of the transmission shaft, which is not enough to install the encoder.

[0008] During the applicant's renovation work on some old coal mining machines, it was found that the space left in the drive shaft end cover was relatively small, and the rear end cover for installing the encoder could not be installed, which easily caused problems such as oil leakage. Moreover, the connection between the drive shaft and the encoder required coaxiality, which made the renovation more difficult.

[0009] In order to solve the above problems, people have been seeking an ideal technical solution. Utility Model Content

[0010] The purpose of the utility model is to address the deficiencies of the existing technology and thus provide a coal mining machine walking distance measuring device suitable for the transformation of old coal mining machines, which improves the distance measurement and positioning accuracy and does not affect the transmission safety.

[0011] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a coal machine walking distance measuring device, including an explosion-proof encoder component, an encoder mounting bracket and a coupling component;

[0012] The explosion-proof encoder assembly includes an explosion-proof housing and an encoder, wherein the encoder is built into the explosion-proof housing, and a transmission shaft of the encoder extends outside the explosion-proof housing;

[0013] The encoder mounting bracket includes a connecting plate and an extension portion, wherein a mounting hole and a connecting hole are provided on the connecting plate, and the connecting plate and the mounting hole are used to connect to the coal mining machine mounting box; one end of the extension portion is fixed to the connecting plate, and the other end of the extension portion is fixed to the encoder, and a through hole is provided inside the extension portion for passing the transmission shaft of the encoder, and the through hole is directly opposite to the connecting hole of the encoder mounting bracket;

[0014] The coupling assembly includes a coupling and a connecting shaft. The overall connection length of the coupling and the connecting shaft is adjustable. One end of the coupling is used to connect to the transmission shaft of the encoder, and the connecting shaft is used to connect to the transmission shaft of the coal mining machine.

[0015] Based on the above, the connecting plate of the encoder mounting bracket is in a triangle or quadrilateral shape as a whole, and the mounting holes are provided at each corner of the triangle or quadrilateral.

[0016] Based on the above, the mounting hole is located outside the outline of the explosion-proof housing in terms of projected area.

[0017] Based on the above, a connecting key is provided in the coupling, and an axial long groove is provided corresponding to the connecting shaft. The connecting shaft adjusts the overall connection length between the coupling and the connecting shaft by axial sliding, and a set screw for fixing the connecting shaft is built into the coupling.

[0018] Based on the above, the coal shearer mounting box includes a box body and a coal shearer mounting box flange. The coal shearer mounting box flange is installed in the box body at the transmission shaft corresponding to the coal shearer, and the connecting plate of the encoder mounting bracket is installed at the outer end of the coal shearer mounting box flange. A sealing ring and a retaining ring are provided at the connection between the center hole of the coal shearer mounting box flange and the connecting shaft of the coupling assembly.

[0019] Based on the above, an extension shaft is fixed at the axis center of the outer end of the transmission shaft of the coal mining machine, and the outer end of the extension shaft is connected to the connecting shaft of the coupling.

[0020] Based on the above, the explosion-proof housing includes an upper cover and a base. The upper cover and the base are combined to form a first explosion-proof joint surface. The upper cover is pressed and fixed on the base by a downward pressure baffle.

[0021] An axial hole is provided at the lower end of the base, and the transmission shaft of the encoder is rotatably mounted in the axial hole through a deep groove ball bearing, a bearing retaining ring and a gasket and extends beyond the base, and the junction between the transmission shaft surface of the encoder and the axial hole forms a second explosion-proof joint surface;

[0022] A wire lead hole and a compression nut are provided on the side of the base, and the wire lead hole is connected with the compression nut to form a third explosion-proof joint surface.

[0023] Based on the above, two sets of deep groove ball bearings, bearing retaining rings and gaskets are arranged in the axial direction in the shaft hole.

[0024] Based on the above, the encoder is an absolute encoder with an accuracy of at least centimeter level.

[0025] The present invention has substantial features and progress over the prior art. Specifically, the present invention has the following advantages:

[0026] This solution is designed based on the transformation of old equipment. It adopts the concept of overall external and explosion-proof, and designs an explosion-proof encoder assembly, an encoder mounting bracket and a coupling assembly. Among them, the explosion-proof encoder assembly is located outside the axial end cover of the coal mining machine as a whole, and the encoder mounting bracket is used to connect the explosion-proof encoder assembly and the coal mining machine installation box, so that encoder-related components are no longer installed inside the traditional drive shaft end cover, which solves the problem of limited axial installation space of the drive shaft; on this basis, since the entire encoder is external, the distance from the drive shaft of the coal mining machine is increased, and different coal mining machines have different installation distances, so the coupling assembly is designed to make its axial length adjustable, as a flexible coupling with variable length, to achieve a fully adaptive connection with the coal mining machine drive shaft.

[0027] The modified encoder can be compatible with more than 90% of the old coal mining machines on the market, greatly reducing the difficulty of modification. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the traveling distance measuring device of the coal mining machine of the utility model.

[0029] Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle.

[0030] Figure 3 It is a front view of the installed state of the traveling distance measuring device of the coal mining machine of the utility model.

[0031] Figure 4 This is a detailed diagram of the interior of the traveling distance measuring device of the coal mining machine of the present invention.

[0032] Figure 5 It is a top view of the traveling distance measuring device of the coal mining machine of the utility model.

[0033] In the figure: 1. Explosion-proof encoder assembly; 2. Encoder mounting bracket; 3. Coupling assembly; 4. Coal mining machine mounting box; 5. Coal mining machine drive shaft; 11. Explosion-proof housing; 12. Encoder; 111. Upper cover; 112. Base; 113. First explosion-proof joint surface; 114. Lower pressure baffle; 115. Deep groove ball bearing; 116. Bearing retaining ring; 117. Gasket; 118. Second explosion-proof joint surface; 119. Pressing nut; 120. Third explosion-proof joint surface; 121. Drive shaft; 21. Connecting plate; 22. Extension part; 23. Mounting hole; 24. Connecting hole; 25. Through hole; 31. Coupling; 32. Connecting shaft; 41. Box body; 42. Coal mining machine mounting box flange; 51. Extension shaft. DETAILED DESCRIPTION

[0034] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0035] like Figure 1-Figure 5 As shown, a coal machine walking distance measuring device, an explosion-proof encoder component 1, an encoder mounting bracket 2 and a coupling component 3.

[0036] The explosion-proof encoder assembly 1 includes an explosion-proof housing 11 and an encoder 12. The encoder 12 is built into the explosion-proof housing 11. The transmission shaft 121 of the encoder 12 extends outside the explosion-proof housing 11. The encoder 12 is an absolute encoder with an accuracy of at least centimeter level.

[0037] Specifically, in this embodiment, the explosion-proof housing 11 includes an upper cover 111 and a base 112. The upper cover 111 and the base 112 are combined and an O-ring is set to form a first explosion-proof joint surface 113. The upper cover and the base are connected by bolts and screws. The upper cover 111 is also pressed and fixed to the base 112 by a downward pressure baffle 114 to prevent the upper cover 111 from loosening and causing explosion failure.

[0038] An axial hole is provided at the lower end of the base 112, and the transmission shaft of the encoder is rotatably mounted in the axial hole through a deep groove ball bearing 115, a bearing retaining ring 116 and a gasket 117 and extends beyond the base 112. In this embodiment, two sets of deep groove ball bearings, bearing retaining rings and gaskets are arranged in the axial direction in the axial hole to ensure axial straightness; a second explosion-proof joint surface 118 is formed at the junction of the surface of the transmission shaft 121 of the encoder 12 and the axial hole.

[0039] A wire hole and a clamping nut 119 are provided on the side of the base 112. The wire hole is connected to the clamping nut 119 to form a third explosion-proof joint surface 120. The data line of the encoder passes through the rubber ring at the inner end of the clamping nut, and explosion-proof is achieved through the clamping structure.

[0040] The encoder mounting bracket 2 includes a connecting plate 21 and an extension portion 22. The connecting plate 21 is provided with a mounting hole 23 and a connecting hole 24. The connecting plate 21 and the mounting hole 23 are used to connect to the coal mining machine mounting box 4; one end of the extension portion 22 is fixed to the connecting plate 21, and the other end of the extension portion 22 is fixed to the encoder 12. A through hole 25 is provided inside the extension portion 22 for passing the transmission shaft 121 of the encoder 12, and the through hole 25 is directly opposite to the connecting hole 24 of the encoder mounting bracket; the connecting plate 21 of the encoder mounting bracket 2 is triangular or quadrilateral as a whole, and the mounting holes are provided at each corner of the triangle or quadrilateral, and the mounting holes are located outside the outline of the explosion-proof shell in terms of projected area.

[0041] The coupling assembly 3 includes a coupling 31 and a connecting shaft 32. The overall connection length of the coupling 31 and the connecting shaft 32 is adjustable. One end of the coupling 31 is used to connect to the transmission shaft 121 of the encoder, and the connecting shaft 32 is used to connect to the transmission shaft 5 of the coal mining machine.

[0042] A connecting key is provided in the coupling 31, and an axial long groove is provided correspondingly in the connecting shaft 32. The connecting shaft 32 adjusts the overall connection length of the coupling 31 and the connecting shaft 32 by axial sliding. A set screw for fixing the connecting shaft 32 is built into the coupling 31. The set screw is a function of the coupling itself, and it tightens the connecting shaft from the side to fix it.

[0043] The coal mining machine mounting box 4 includes a box body 41 and a coal mining machine mounting box flange 42. The coal mining machine mounting box flange 42 is installed in the box body 41 at the transmission shaft 5 corresponding to the coal mining machine. The connecting plate 21 of the encoder mounting bracket 2 is installed at the outer end of the coal mining machine mounting box flange 42. A sealing ring and a retaining ring are provided at the connection between the center hole of the coal mining machine mounting box flange 42 and the connecting shaft 32 of the coupling assembly 3.

[0044] In a preferred embodiment, an extension shaft 51 is fixed to the outer axis of the shearer's drive shaft 5, and the outer end of the extension shaft 51 is connected to the coupling's connecting shaft 32. Furthermore, the connecting shaft's drive end is a square shaft end, while the extension shaft 51's connecting end is a square countersunk hole. The two are plugged together, mutually restraining each other in the rotational direction to achieve rotational transmission. The axially movable connection allows for real-time changes in the connection length.

[0045] Technical principle description:

[0046] In old coal mining machines, since there is no installation position reserved on the drive shaft, the distance between the end of the drive shaft and the shaft end cover is very short. When the encoder is modified and installed, the entire encoder and components cannot be installed due to explosion-proof and sealing requirements.

[0047] In this application, the expectation of internal installation is abandoned, and the entire encoder and peripheral structure are installed by external mounting. Specifically, the encoder is equipped with an explosion-proof shell, and then an encoder mounting bracket is set. At the same time, the structure of the coal mining machine mounting box 4 is adjusted, and the coal mining machine mounting box flange is modified to match the encoder mounting bracket 2.

[0048] The explosion-proof encoder assembly is installed on the outer surface of the shearer mounting box flange through the encoder mounting bracket, and the coupling is used to connect the encoder's transmission shaft to the shearer's transmission shaft.

[0049] Since the overall length of the coupling assembly 3 is adjustable, the overall length of the coupling assembly 3 can be adjusted according to the required connection distance with the transmission shaft of the modified coal mining machine, so that the axial length can be flexibly adjusted.

[0050] After the device is installed, the encoder's own capabilities are used to count the number of rotations of the shearer's drive shaft. Combined with other parameters such as rotational speed, the length of the shearer's travel path is finally calculated to achieve distance measurement.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A coal mining machine travel distance measuring device, characterized in that: Includes explosion-proof encoder assembly, encoder mounting bracket and coupling assembly; The explosion-proof encoder assembly includes an explosion-proof housing and an encoder, wherein the encoder is built into the explosion-proof housing, and a transmission shaft of the encoder extends outside the explosion-proof housing; The encoder mounting bracket includes a connecting plate and an extension portion, wherein a mounting hole and a connecting hole are provided on the connecting plate, and the connecting plate and the mounting hole are used to connect to the coal mining machine mounting box; one end of the extension portion is fixed to the connecting plate, and the other end of the extension portion is fixed to the encoder, and a through hole is provided inside the extension portion for passing the transmission shaft of the encoder, and the through hole is directly opposite to the connecting hole of the encoder mounting bracket; The coupling assembly includes a coupling and a connecting shaft. The overall connection length of the coupling and the connecting shaft is adjustable. One end of the coupling is used to connect to the transmission shaft of the encoder, and the connecting shaft is used to connect to the transmission shaft of the coal mining machine.

2. The coal mining machine travel distance measuring device according to claim 1, characterized in that: The connecting plate of the encoder mounting bracket is in a triangle or quadrilateral shape as a whole, and the mounting holes are provided at each corner of the triangle or quadrilateral.

3. The coal mining machine travel distance measuring device according to claim 2, characterized in that: The mounting hole is located outside the outline of the explosion-proof housing in terms of projected area.

4. The coal mining machine travel distance measuring device according to claim 2 or 3, characterized in that: A connecting key is provided in the coupling, and an axial long slot is provided correspondingly on the connecting shaft. The connecting shaft adjusts the overall connection length between the coupling and the connecting shaft by axial sliding, and a set screw for fixing the connecting shaft is built into the coupling.

5. The coal mining machine travel distance measuring device according to claim 4, characterized in that: The coal mining machine mounting box includes a box body and a coal mining machine mounting box flange. The coal mining machine mounting box flange is installed in the box body at the transmission shaft corresponding to the coal mining machine. The connecting plate of the encoder mounting bracket is installed at the outer end of the coal mining machine mounting box flange. A sealing ring and a retaining ring are provided at the connection between the center hole of the coal mining machine mounting box flange and the connecting shaft of the coupling assembly.

6. The coal mining machine travel distance measuring device according to claim 5, characterized in that: An extension shaft is fixed at the axis center of the outer end of the transmission shaft of the coal mining machine, and the outer end of the extension shaft is connected to the connecting shaft of the coupling.

7. The coal mining machine travel distance measuring device according to claim 5 or 6, characterized in that: The explosion-proof housing includes an upper cover and a base, wherein the upper cover and the base are combined to form a first explosion-proof joint surface, and the upper cover is pressed and fixed on the base by a downward pressure baffle; An axial hole is provided at the lower end of the base, and the transmission shaft of the encoder is rotatably mounted in the axial hole through a deep groove ball bearing, a bearing retaining ring and a gasket and extends beyond the base, and the junction between the transmission shaft surface of the encoder and the axial hole forms a second explosion-proof joint surface; A wire lead hole and a compression nut are provided on the side of the base, and the wire lead hole is connected with the compression nut to form a third explosion-proof joint surface.

8. The coal mining machine travel distance measuring device according to claim 7, characterized in that: Two sets of deep groove ball bearings, bearing retaining rings and gaskets are arranged in the axial direction of the shaft hole.

9. The coal mining machine travel distance measuring device according to claim 8, characterized in that: The encoder is an absolute value encoder with an accuracy of at least centimeter level.

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