Top coal caving hydraulic support

Abstract

The utility model discloses a top coal caving hydraulic support, and relates to the technical field of hydraulic supports. The top coal caving hydraulic support comprises a moving structure, a supporting structure is arranged at the top end of the moving structure, two positioning structures are arranged at the bottom end of the moving structure, each positioning structure comprises a driving box, the inner wall of each driving box is rotationally connected with an eccentric rod through a built-in motor, and the outer side of each eccentric rod is movably sleeved with a movable lantern ring; a ground contact plate is fixedly installed at the bottom end of the movable lantern ring and located below the driving box. A built-in motor in a driving box can drive a movable lantern ring to slide along the inner wall of the driving box through an eccentric rod, the movable lantern ring is driven to drive a ground contact plate to make contact with the ground gradually, the ground contact plate can lift a moving structure, and the hydraulic support can be locked at a designated position after moving is completed; and the situation of position deviation is avoided, so that the use safety of the hydraulic support is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic support, concretely to a top coal caving hydraulic support. BACKGROUND

[0002] The top coal caving hydraulic support is developed on the basis of the ordinary longwall working face hydraulic support, and the functions of controlling basic items, maintaining the immediate roof, self-moving and moving the conveyor are same, but the top coal caving mechanism, support stress, head support, dust fall and other functions are different, the top coal caving hydraulic support product has the following characteristics: stable support, continuous coal discharge, less back loss, good coal discharge effect, small equipment investment for thick coal seam mining, high cost performance, suitable for thick coal seam with medium hardness below, obvious joint and fracture development.

[0003] Through the cooperation of the jacking assembly and the matching assembly, the utility model effectively discards the design of multiple hydraulic assemblies in the prior art, not only reduces the weight of the overall hydraulic support, but also greatly reduces the manufacturing cost of the hydraulic support.

[0004] But the above scheme still has certain deficiency in actual use, the technical scheme in this scheme drives the bottom plate to move to the position needed to be moved through the movement of the universal wheel, and then drives the support to move to the position needed to be moved;

[0005] The scheme does not set the locking structure, so that the support is easy to deviate after moving to the specified position, and the use safety of the hydraulic support is greatly reduced. UTILITY MODEL CONTENTS

[0006] The utility model provides a top coal caving hydraulic support to solve the problems in the prior art.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a top coal caving hydraulic support, including mobile structure, the top of mobile structure is provided with support structure, the bottom of mobile structure is provided with two positioning structure,

[0008] The positioning structure includes a drive box, an eccentric rod is rotatably connected to the inner wall of the drive box through a built-in motor, an active sleeve ring is movably sleeved on the outer side of the eccentric rod, a ground plate is fixedly installed at the bottom end of the active sleeve ring, and the ground plate is located below the drive box.

[0009] Further, the mobile structure includes a mobile base, a drive track is arranged at the side end of the mobile base, a push handle is arranged at the top end of the mobile base, an installation opening is formed in the mobile base, and the drive box is located in the installation opening.

[0010] Further, the support structure includes a bottom plate and a top plate, opposite ends of the bottom plate and the top plate are fixedly installed with slide rails, a folding frame is slidably connected between the two groups of slide rails, a hydraulic cylinder is hingedly connected to the top end of the bottom plate, and a movable end of the hydraulic cylinder is hingedly connected to the inner side of the folding frame.

[0011] Further, the inner side of the movable sleeve ring is slidably connected with the surface of the vertical rod.

[0012] Further, the inner wall of the driving box is fixedly installed with a vertical rod, and the inner side of the movable sleeve ring is slidably connected with the surface of the vertical rod.

[0013] Further, the output shaft of the built-in motor is fixedly sleeved with a gear ring, the inner wall of the driving box is slidably connected with a gear rack through an electric push rod, and the gear rack is located below the gear ring.

[0014] Compared with the prior art, the utility model provides a kind of top coal caving hydraulic support, with following beneficial effects:

[0015] The top coal caving hydraulic support, by setting positioning structure, using the built-in motor in the driving box can be slid along the inner wall of the driving box by eccentric rod, driving movable sleeve ring gradually ground plate is contacted with ground, so that ground plate can lift moving structure, so that the hydraulic support can be locked in specified position after moving, avoid the situation of position deviation, to improve the use safety of the hydraulic support. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of the utility model;

[0017] Figure 2 It is the moving structure schematic diagram of the utility model;

[0018] Figure 3 It is the support structure schematic diagram of the utility model;

[0019] Figure 4 It is the positioning structure schematic diagram of the utility model.

[0020] In the drawing: 1, moving structure;101, moving base;102, driving caterpillar belt;103, push handle;104, mounting port;2, support structure;201, bottom plate;202, top plate;203, slide rail;204, folding frame;205, hydraulic cylinder;3, positioning structure;301, driving box;302, built-in motor;303, eccentric rod;304, movable sleeve ring;305, ground plate;306, vertical rod;307, gear ring;308, gear rack. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0022] Please refer to Figures 1-4 The utility model discloses a top coal caving hydraulic support, including mobile structure 1, mobile structure 1's top is provided with support structure 2, mobile structure 1's bottom is provided with two positioning structure 3.

[0023] Positioning structure 3 includes drive box 301, the inner wall of drive box 301 is rotationally connected with eccentric rod 303 through built-in motor 302, the outer side of eccentric rod 303 is movably sleeved with movable sleeve ring 304, the bottom of movable sleeve ring 304 is fixedly installed with ground plate 305, ground plate 305 is located below drive box 301.

[0024] Specifically, mobile structure 1 includes mobile base 101, the side end of mobile base 101 is provided with drive caterpillar band 102, the top of mobile base 101 is provided with push handle 103, the inside of mobile base 101 is provided with installation port 104, drive box 301 is located inside installation port 104

[0025] In the embodiment, start drive caterpillar band 102, make drive caterpillar band 102 drive mobile base 101 and move to the designated position.

[0026] Specifically, the support structure 2 includes a bottom plate 201 and a top plate 202, the opposite ends of the bottom plate 201 and the top plate 202 are fixedly installed with slide rails 203, two groups of slide rails 203 are slidably connected with folding frames 204, the top end of the bottom plate 201 is hingedly connected with a hydraulic cylinder 205, and the movable end of the hydraulic cylinder 205 is hingedly connected with the inner side of the folding frame 204.

[0027] In the embodiment, the support structure 2 is started, the movable end of the hydraulic cylinder 205 drives the folding frame 204 to deform, the interval between the top plate 202 and the bottom plate 201 gradually increases, the height of the top plate 202 is adjusted, and the coal mining operation is facilitated.

[0028] Specifically, the inside of the movable sleeve ring 304 is provided with a sliding groove, and one end of the eccentric rod 303 away from the built-in motor 302 is located inside the sliding groove and is slidably connected with the inner wall of the sliding groove.

[0029] In the embodiment, since the other end of the eccentric rod 303 is located in the sliding groove inside the movable collar 304, the eccentric rod 303 will change the relative position with the movable collar 304 during rotation, so as to drive the movable collar 304 to move up and down along the vertical rod 306.

[0030] Specifically, the inner wall of the driving box 301 is fixedly installed with the vertical rod 306, and the inner part of the movable collar 304 is in sliding connection with the surface of the vertical rod 306.

[0031] In the embodiment, the movable collar 304 can slide along the vertical rod 306, so as to improve the movement stability of the movable collar 304.

[0032] Specifically, the output shaft of the built-in motor 302 is fixedly sleeved with a gear ring 307, the inner wall of the driving box 301 is slidingly connected with a gear rack 308 through an electric push rod, and the gear rack 308 is located below the gear ring 307.

[0033] In the embodiment, when the eccentric rod 303 needs to be locked, the electric push rod is started, so that the movable end of the electric push rod drives the gear rack 308 to gradually engage with the gear ring 307, so that the gear ring 307 cannot rotate at this time, so that the gear ring 307 together with the eccentric rod 303 is locked, so that the ground plate 305 can stably lift the moving base 101.

[0034] In use, first, the driving crawler 102 is started, so as to drive the moving base 101 to move to a specified position;

[0035] Then, the positioning structure 3 is started, so that the built-in motor 302 in the driving box 301 drives the eccentric rod 303 to rotate, since the other end of the eccentric rod 303 is located in the sliding groove inside the movable collar 304, the eccentric rod 303 will change the relative position with the movable collar 304 during rotation, so as to drive the movable collar 304 to move up and down along the vertical rod 306, so that the movable collar 304 drives the ground plate 305 to gradually contact the ground, so that the ground plate 305 lifts the moving base 101, so that the ground plate 305 replaces the driving crawler 102 to lift the moving base 101;

[0036] When the eccentric rod 303 needs to be locked, the electric push rod is started, so that the movable end of the electric push rod drives the gear rack 308 to gradually engage with the gear ring 307, so that the gear ring 307 cannot rotate at this time, so that the gear ring 307 together with the eccentric rod 303 is locked, so that the ground plate 305 can stably lift the moving base 101.

[0037] After the positioning process is completed, the support structure 2 is started, so that the movable end of the hydraulic cylinder 205 drives the folding frame 204 to deform, promotes the interval between the top plate 202 and the bottom plate 201 to gradually increase, so that the height of the top plate 202 is adjusted, so as to facilitate the later coal mining operation.

[0038] In conclusion, the top coal caving hydraulic support sets the positioning structure 3, uses the built-in motor 302 in the drive box 301 to promote the movable ring 304 to slide along the inner wall of the drive box 301 through the eccentric rod 303, drives the movable ring 304 to drive the ground plate 305 to gradually contact the ground, so that the ground plate 305 can lift the moving structure 1, so that the hydraulic support can be locked in the specified position after moving, avoiding the position offset, thereby improving the use safety of the hydraulic support.

[0039] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic powered roof caving support comprising a mobile structure (1), characterized in that: The top end of the mobile structure (1) is provided with a support structure (2), and the bottom end of the mobile structure (1) is provided with two positioning structures (3); The positioning structure (3) comprises a drive box (301), an eccentric rod (303) is rotatably connected to the inner wall of the drive box (301) through a built-in motor (302), an active sleeve ring (304) is movably sleeved on the outer side of the eccentric rod (303), a ground contact plate (305) is fixedly installed at the bottom end of the active sleeve ring (304), and the ground contact plate (305) is located below the drive box (301).

2. The hydraulic powered coal caving support according to claim 1, characterized in that: The mobile structure (1) comprises a mobile base (101), the side end of the mobile base (101) is provided with a drive track (102), the top end of the mobile base (101) is provided with a push handle (103), the inside of the mobile base (101) is provided with a mounting port (104), and the drive box (301) is located in the mounting port (104).

3. The hydraulic powered coal caving support according to claim 1, characterized in that: The support structure (2) comprises a bottom plate (201) and a top plate (202), the opposite ends of the bottom plate (201) and the top plate (202) are both fixedly installed with sliding rails (203), a folding frame (204) is slidably connected between the two groups of sliding rails (203), a hydraulic cylinder (205) is hingedly connected to the top end of the bottom plate (201), and the movable end of the hydraulic cylinder (205) is hingedly connected to the inner side of the folding frame (204).

4. The hydraulic powered coal caving support according to claim 1, characterized in that: The inside of the active sleeve ring (304) is provided with a sliding groove, and the end of the eccentric rod (303) away from the built-in motor (302) is located in the sliding groove and is slidably connected with the inner wall of the sliding groove.

5. The hydraulic powered coal caving support according to claim 1, characterized in that: The inner wall of the drive box (301) is fixedly installed with a vertical rod (306), and the inside of the active sleeve ring (304) is slidably connected with the surface of the vertical rod (306).

6. The hydraulic powered coal caving support according to claim 1, characterized in that: The output shaft of the built-in motor (302) is fixedly sleeved with a gear ring (307), the inner wall of the drive box (301) is slidably connected with a gear rack (308) through an electric push rod, and the gear rack (308) is located below the gear ring (307).

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