CN219509654U

CN219509654U - Bottom lifting mechanism for thin coal seam support

Info

Publication number: CN219509654U
Application number: CN202320592585.5U
Authority: CN
Inventors: 王勇; 李伟利; 李坤
Original assignee: Hefei Design And Research Institute Of Coal Industry LLC
Current assignee: Hefei Design And Research Institute Of Coal Industry LLC
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2023-08-11
Anticipated expiration: 2033-03-23

Abstract

The utility model discloses a bottom lifting mechanism of a thin coal seam support, which comprises a support, wherein the support comprises a hydraulic support base, a groove is formed in the surface of the hydraulic support base, a bottom lifting assembly is hinged to the side wall of the groove, and the bottom lifting assembly comprises: the backup pad, the backup pad articulates on the inner wall of recess, the inside fixedly connected with motor of backup pad, the output fixedly connected with threaded rod of motor, the tip fixedly connected with of backup pad two sets of splint that symmetry set up. This mechanism at bottom of thin coal seam support lifts is driven through the jack and lifts end subassembly downward sloping for the tip and the bottom surface contact of slide, thereby support the hydraulic support base, and drive the threaded rod through the motor and rotate, thereby make the inside extension of slide backup pad, support the hydraulic support base, can avoid lifting end device effectively to lift the frame power little, the jack loaded state is relatively poor, easily leads to the condition of jack bending damage to appear.

Description

Bottom lifting mechanism for thin coal seam support

Technical Field

The utility model relates to the technical field of hydraulic supports, in particular to a bottom lifting mechanism of a thin coal seam support.

Background

In recent years, along with the large-scale exploitation of medium-thickness coal beds, coal reserves are rapidly reduced, the contradiction between continuous production and resource balance exploitation is increasingly outstanding, the thin coal beds are gradually evolved into main coal mining layers of various mines, and the development of a thin coal layer coal mining machine, a scraper conveyor and a hydraulic support becomes a main subject of the research of the coal industry nowadays and is also a main support of the future support market. Because of the particularity of domestic coal seam geological conditions, the unmanned mining technology of the coal planer is less applied in China, the domestic thin coal seam hydraulic support is mainly matched with a coal cutter and a scraper, and the development technology has the difficulties of mainly increasing the space of pedestrians in a limited space, ensuring the passing space requirement of the coal cutter, meeting the expansion ratio requirement and the bearing requirement of the support, improving the support strength, simplifying the arrangement of a hydraulic system and the like. In particular, the size of the pedestrian space is a key factor for determining the service performance of the bracket of the thin coal seam. Because of the influence of factors such as space, the current domestic thin coal seam support is generally not provided with a bottom lifting mechanism, but when severe conditions such as extremely soft coal seam bottom plates and water expansion are met, the configuration of the bottom lifting mechanism is a necessary condition for guaranteeing the use of the support.

The existing lever type bottom lifting device adopts the lever principle, and when the bottom lifting cylinder is retracted, the pressing plate is driven to rotate and acts on the push rod, so that the support base is lifted. The advantage is that occupy the altitude space little, can be applicable to extremely thin coal seam support. The method has the advantages of occupying large width of a pedestrian passageway, having small effective lifting force, being poor in loading state of the jack and being easy to cause bending damage of the jack.

Disclosure of Invention

The utility model mainly aims to provide a bottom lifting mechanism of a thin coal seam support, which can avoid the conditions that the effective lifting force of a bottom lifting device is small, the loaded state of a jack is poor, and the jack is easy to bend and damage.

In order to achieve the above purpose, the utility model provides a bottom lifting mechanism of a thin coal seam support, which comprises a hydraulic support base, wherein a groove is formed in the surface of the hydraulic support base, a bottom lifting assembly is hinged to the side wall of the groove, and the bottom lifting assembly comprises: the support plate is hinged on the inner wall of the groove, a motor is fixedly connected inside the support plate, the output end of the motor is fixedly connected with a threaded rod, and the end part of the support plate is fixedly connected with two groups of clamping plates which are symmetrically arranged; and the end part of the sliding plate is provided with a threaded hole, the threaded rod is in threaded connection with the inside of the threaded hole, and the side wall of the sliding plate is provided with a guide groove and an arc groove.

Preferably, a jack is hinged on the surface of the supporting plate, one end, far away from the supporting plate, of the jack is hinged with a fixing frame, and the fixing frame is fixedly connected to the surface of the hydraulic support base.

Preferably, the surface of backup pad and slide all is provided with the strengthening rib that multiunit array distributes.

Preferably, the end of the sliding plate is provided with a mounting groove, and the inside of the mounting groove is rotationally connected with a roller.

Preferably, the clamping plate is slidingly connected inside the guide groove.

Preferably, the inner part of the arc-shaped groove is rotationally connected with a ball.

Advantageous effects

The utility model provides a bottom lifting mechanism of a thin coal seam support. The beneficial effects are as follows:

(1) This mechanism at bottom of thin coal seam support lifts, it is inclined downwards to drive through the jack to lift a subassembly for the tip and the bottom surface contact of slide, thereby support the hydraulic support base, and drive the threaded rod through the motor and rotate, thereby make the inside extension of slide backup pad, support the hydraulic support base, can avoid lifting at the bottom of the device effectively to lift the frame power little, the jack loaded state is relatively poor, easily leads to the condition of jack bending damage to appear.

(2) This thin coal seam support lifts end mechanism improves the intensity of backup pad and slide self through the strengthening rib, sets up the tip at the slide through the gyro wheel, through the mutually supporting of splint and guide way to improve the fastness of backup pad and slide junction.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a front view structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

fig. 3 is an enlarged schematic view of the structure of the present utility model at a.

In the figure: 1. a hydraulic support base; 2. a groove; 3. a bottom lifting assembly; 31. a support plate; 32. a motor; 33. a threaded rod; 34. a clamping plate; 35. a slide plate; 36. a threaded hole; 37. a guide groove; 38. an arc-shaped groove; 39. a ball; 310. a jack; 311. a fixing frame; 312. a mounting groove; 313. and a roller.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the utility model provides a bottom lifting mechanism of a thin coal seam support, which comprises a hydraulic support base 1, wherein a groove 2 is formed in the surface of the hydraulic support base 1, and a bottom lifting assembly 3 is hinged to the side wall of the groove 2.

In the embodiment of the present utility model, the bottom lifting assembly 3 includes:

the support plate 31 is hinged on the inner wall of the groove 2, a motor 32 is fixedly connected inside the support plate 31, a threaded rod 33 is fixedly connected to the output end of the motor 32, and two groups of clamping plates 34 which are symmetrically arranged are fixedly connected to the end part of the support plate 31;

and a slide plate 35, the end of the slide plate 35 is provided with a threaded hole 36, the threaded rod 33 is in threaded connection with the inside of the threaded hole 36, the side wall of the slide plate 35 is provided with a guide groove 37 and an arc-shaped groove 38, the clamping plate 34 is in sliding connection with the inside of the guide groove 37, and the inside of the arc-shaped groove 38 is rotationally connected with a ball 39. In use, the threaded rod 33 is rotated by the motor 32 such that the slide 35 and thus the support plate 31 extend inwardly.

Specifically, in the embodiment of the utility model, the bottom lifting assembly 3 comprises a supporting plate 31, a motor 32, a threaded rod 33, a clamping plate 34, a sliding plate 35, a threaded hole 36, a guide groove 37, an arc groove 38 and a ball 39, friction force of the sliding plate 35 in the moving process is reduced through cooperation of the arc groove 38 and the ball 39, firmness of a connecting position of the supporting plate 31 and the sliding plate 35 is improved through cooperation of the clamping plate 34 and the guide groove 37, a jack 310 is hinged to the surface of the supporting plate 31, one end, far away from the supporting plate 31, of the jack 310 is hinged to a fixing frame 311, the fixing frame 311 is fixedly connected to the surface of the hydraulic support base 1, and the lifting assembly 3 is driven to incline downwards through the jack 310, so that the end of the sliding plate 35 is in contact with the bottom surface, and the hydraulic support base 1 is supported.

In the embodiment of the utility model, the surfaces of the supporting plate 31 and the sliding plate 35 are provided with a plurality of groups of reinforcing ribs distributed in an array manner, the end part of the sliding plate 35 is provided with the mounting groove 312, the inside of the mounting groove 312 is rotatably connected with the roller 313, the strength of the supporting plate 31 and the sliding plate 35 is improved through the reinforcing ribs, the roller 313 is arranged at the end part of the sliding plate 35, and when the sliding plate 35 inclines, the roller 313 is contacted with the ground, so that the abrasion of the sliding plate 35 is avoided.

In addition, in order to avoid the effective lifting force of the bottom lifting device to be small, the loaded state of the jack is poor, the condition that the jack is easy to bend and damage occurs, the bottom lifting assembly 3 is driven to incline downwards through the jack 310, the end part of the sliding plate 35 is contacted with the bottom surface, the hydraulic support base 1 is supported, the threaded rod 33 is driven to rotate through the motor 32, the sliding plate 35 extends out of the support plate 31, and the hydraulic support base 1 is supported.

In order to improve the firmness of the bottom lifting mechanism, the strength of the supporting plate 31 and the sliding plate 35 is improved through the reinforcing ribs, the supporting plate 31 and the sliding plate 35 are arranged at the end part of the sliding plate 35 through the rollers 313, and the firmness of the connecting part of the supporting plate 31 and the sliding plate 35 is improved through the mutual matching of the clamping plates 34 and the guide grooves 37.

In the utility model, when the lifting device is used, the lifting assembly is driven by the jack to incline downwards, so that the end part of the sliding plate is contacted with the bottom surface, the hydraulic support base is supported, the motor drives the threaded rod to rotate, the sliding plate extends out of the supporting plate, the hydraulic support base is supported, the effective lifting force of the lifting device is small, the lifting device is poorer in loading state, the situation that the lifting device is easy to bend and damage is easily caused is avoided, the strength of the supporting plate and the sliding plate is improved through the reinforcing rib, the roller is arranged at the end part of the sliding plate, and the clamping plate is matched with the guide groove, so that the firmness of the connecting part of the supporting plate and the sliding plate is improved.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a thin coal seam support lifts end mechanism, includes hydraulic support base (1), set up flutedly (2) on the surface of hydraulic support base (1), its characterized in that: the side wall of recess (2) articulates has lifts end subassembly (3), lift end subassembly (3) include:

the support plate (31), the support plate (31) is hinged on the inner wall of the groove (2), a motor (32) is fixedly connected in the support plate (31), a threaded rod (33) is fixedly connected to the output end of the motor (32), and two groups of clamping plates (34) which are symmetrically arranged are fixedly connected to the end part of the support plate (31);

and a sliding plate (35), wherein a threaded hole (36) is formed in the end part of the sliding plate (35), the threaded rod (33) is in threaded connection with the inside of the threaded hole (36), and a guide groove (37) and an arc-shaped groove (38) are formed in the side wall of the sliding plate (35).

2. The bottom lifting mechanism of the thin coal seam support according to claim 1, wherein: the hydraulic support is characterized in that a jack (310) is hinged to the surface of the supporting plate (31), a fixing frame (311) is hinged to one end, away from the supporting plate (31), of the jack (310), and the fixing frame (311) is fixedly connected to the surface of the hydraulic support base (1).

3. The bottom lifting mechanism of the thin coal seam support according to claim 1, wherein: the surface of backup pad (31) and slide (35) all are provided with the strengthening rib of multiunit array distribution.

4. The bottom lifting mechanism of the thin coal seam support according to claim 1, wherein: the end of the sliding plate (35) is provided with a mounting groove (312), and the inside of the mounting groove (312) is rotatably connected with a roller (313).

5. The bottom lifting mechanism of the thin coal seam support according to claim 1, wherein: the clamping plate (34) is connected inside the guide groove (37) in a sliding mode.

6. The bottom lifting mechanism of the thin coal seam support according to claim 1, wherein: the inside of the arc-shaped groove (38) is rotatably connected with a ball (39).