Hydraulic support bottom lifting device

Abstract

The utility model belongs to the technical field of hydraulic supports, and particularly relates to a hydraulic support bottom lifting device which comprises a rear installation plate, a push rod hinge seat is fixedly connected to one side wall of the rear installation plate, and an electric push rod is hinged to the push rod hinge seat. The two sets of side mounting plates are arranged, the two sets of side mounting plates are arranged on the side, located on the rear mounting plate, of the push rod hinge seat, and a top cover plate is arranged above the side mounting plates; and one side wall of the supporting frame is fixedly connected with the telescopic end of the electric push rod. By arranging the top cover plate, the bottom lifting device can be protected conveniently, the working safety is improved, and mineral coal briquettes are prevented from being clamped on the working bottom lifting device; longitudinal space can be saved conveniently, the hydraulic support is prevented from colliding with the bottom lifting device to be damaged during working, and the safety of the device is improved. Reset assistance can be conveniently carried out on the supporting frame when the electric push rod shrinks and resets, transmission continuity is improved, clamping is avoided, and the device is diversified in function.

Description

Technical Field

[0001] The present application belongs to the technical field of hydraulic supports, and in particular relates to a hydraulic support bottom lifting device. Background Art

[0002] Hydraulic support is the main support equipment for the fully mechanized mining face in underground coal mines. my country has rich coal resources, of which thin coal seams account for a considerable proportion. As medium and thick coal seams are mined one after another, the mining of thin coal seams accounts for an increasing proportion. In the process of coal mining, due to the complex geological conditions in most underground mines, the bottom is sometimes soft and easily nibbled mudstone or muddy sandstone. When the hydraulic support is operating underground, the front end of the hydraulic support base often sinks, and the support cannot be pulled normally, affecting the normal fully mechanized mining work, and even causing safety accidents.

[0003] The existing hydraulic support bottom lifting device has a single function, is not easy to protect, occupies a large space in the vertical direction, and is not easy to use.

[0004] Based on this, the present application designs a hydraulic support bottom lifting device, the purpose of which is to solve the above-mentioned problems. Utility Model Content

[0005] In view of the above analysis, an embodiment of the utility model aims to provide a hydraulic support bottom lifting device to solve the problems raised in the above background technology that the existing hydraulic support bottom lifting device has a single function, is not easy to protect, occupies a large space in the vertical direction, and is not convenient to use.

[0006] To achieve the above objectives, the technical solution provided in the embodiments of the present application includes:

[0007] A rear mounting plate, a side wall of which is fixedly connected to a push rod hinge seat, and an electric push rod is hingedly connected to the push rod hinge seat;

[0008] Side mounting plates, the side mounting plates are provided with two groups, the two groups of side mounting plates are arranged on one side of the push rod hinge seat located at the rear mounting plate, a top cover plate is arranged above the side mounting plates, the two groups of side mounting plates are fixedly connected to the lower side of the top cover plate, an inner cavity is provided on the top cover plate, a follower component is provided in the inner cavity, a connecting column is fixedly connected to the bottom of the follower component, a guide slot is provided on the side close to each other of the two groups of side mounting plates, a guide slider is slidably connected in the guide slot;

[0009] A support frame, one side wall of the support frame is fixedly connected to the telescopic end of the electric push rod, a pressure plate is arranged on the side of the support frame away from the electric push rod, support rods are fixedly connected to the side walls at both ends of the pressure plate, the other ends of the two groups of support rods are respectively fixedly connected to the two groups of guide sliders, a roller bracket is fixedly connected to the roller bracket through a bearing to rotate with a roller shaft, a downward pressure roller is fixedly connected to the roller shaft, pull rings are fixedly connected to the support frame and the connecting column, and a spring is arranged for hooking between the two groups of pull rings facing each other.

[0010] Preferably, an opening is provided below the inner cavity, the opening passes through the lower side of the top cover plate, and the connecting column passes through the opening.

[0011] Preferably, the follower assembly includes a follower plate, which is located in the inner cavity. The cross-sectional width of the follower plate is greater than the width of the opening. An accommodating cavity is provided on the lower side wall of the follower plate. A ball is arranged in the accommodating cavity, and the ball abuts against the inner cavity.

[0012] Preferably, the accommodating cavity is a spherical cavity, the inner wall of the accommodating cavity and the outer wall of the ball are both smooth, and the ball is arranged to roll in the accommodating cavity.

[0013] Preferably, the guide slot is obliquely arranged on the side mounting plate, and the lower end of the guide slot is located on the side away from the rear mounting plate, and the upper end of the guide slot is located below the rotation axis of the electric push rod.

[0014] Preferably, the support frame is U-shaped, and the two groups of support rods pass through the two arms of the support frame respectively and are rotatably connected through bearings.

[0015] Preferably, the roller bracket is arranged obliquely relative to the support frame, and a reinforcing rod is fixedly connected between the side wall of the roller bracket and the side wall of the pressure plate.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] 1. The utility model provides a top cover plate on the bottom lifting device, and the top cover plate is located above the electric push rod and the downward pressure roller, so as to protect the bottom lifting device, improve working safety, and prevent mineral coal blocks from being stuck on the bottom lifting device during operation.

[0018] 2. The electric push rod is set horizontally, and the guide slide and roller bracket are set at an angle to save longitudinal space, avoid damage caused by the hydraulic support hitting the bottom lifting device during operation, and improve the safety of the device.

[0019] 3. A follower assembly and a spring are provided to assist the support frame in resetting when the electric push rod is retracted and reset, thereby improving transmission continuity, avoiding jamming, and providing a variety of device functions.

[0020] Of course, any product implementing the present application does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of this specification 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 recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the bottom lifting device of the utility model when the bottom is lifted;

[0024] Figure 3 This is a side view of the base of the hydraulic support of the utility model;

[0025] Figure 4 This is an enlarged view of point A of the utility model;

[0026] Figure 5 This is a schematic diagram of the cross-sectional structure of the top cover plate of the utility model;

[0027] Figure 6 This is a schematic diagram of the top view structure of the utility model;

[0028] Figure 7 This is a schematic diagram of the support frame and roller structure of the utility model.

[0029] Description of reference numerals:

[0030] 1. Rear mounting plate; 2. Push rod hinge seat; 3. Electric push rod; 4. Side mounting plate; 5. Top cover plate; 6. Inner cavity; 7. Follower assembly; 71. Follower plate; 72. Accommodating cavity; 73. Ball; 8. Connecting column; 9. Guide slide groove; 10. Guide slide block; 11. Support frame; 12. Pressure plate; 13. Support rod; 14. Roller bracket; 15. Roller shaft; 16. Press roller; 17. Pull ring; 18. Spring; 19. Opening; 20. Reinforcement rod; 30. Push rod; 40. Hydraulic support base. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] In the accompanying drawings, the size and relative size of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments may be implemented differently, a specific process sequence may be performed in a different order than described. For example, two successively described processes may be performed substantially simultaneously or in an order opposite to the order described. In addition, the same reference numerals represent the same components.

[0033] When a component is referred to as being "on" or "over," "connected to," or "coupled to" another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being "directly on," "directly connected to," or "directly coupled to" another component, there are no intervening components. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0034] For descriptive purposes, the present disclosure may use spatially relative terms such as "top", "bottom", "under", "beneath", "under", "lower", "above", "upper", "above", "higher", etc., relative to components to describe the relationship of one component to another (other) components as shown in the accompanying drawings.

[0035] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0036] To facilitate understanding of the embodiments of the present application, further explanation will be given below with reference to specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present application.

[0037] This embodiment provides a hydraulic support bottom lifting device, such as Figure 1 As shown, a rear mounting plate 1 is fixedly connected to a push rod hinge seat 2 on one side wall of the rear mounting plate 1, and an electric push rod 3 is hingedly connected to the push rod hinge seat 2;

[0038] Side mounting plates 4, two groups of side mounting plates 4 are provided, the two groups of side mounting plates 4 are provided on one side of the push rod hinge seat 2 located on the rear mounting plate 1, a top cover plate 5 is provided above the side mounting plates 4, the two groups of side mounting plates 4 are fixedly connected to the lower side of the top cover plate 5, an inner cavity 6 is provided on the top cover plate 5, a follower component 7 is provided in the inner cavity 6, a connecting column 8 is fixedly connected to the bottom of the follower component 7, a guide slot 9 is provided on the side of the two groups of side mounting plates 4 close to each other, and a guide slider 10 is slidably connected in the guide slot 9;

[0039] A support frame 11, one side wall of the support frame 11 is fixedly connected to the telescopic end of the electric push rod 3, a pressure plate 12 is arranged on the side of the support frame 11 away from the electric push rod 3, support rods 13 are fixedly connected to the side walls of both ends of the pressure plate 12, the other ends of the two groups of support rods 13 are respectively fixedly connected to the two groups of guide sliders 10, a roller bracket 14 is fixedly connected to the roller bracket 14 through a bearing to rotate with a roller shaft 15, a pressure roller 16 is fixedly connected to the roller shaft 15, a pull ring 17 is fixedly connected to the support frame 11 and the connecting column 8, a spring 18 is hooked and arranged between the two groups of pull rings 17 opposite to each other, the rear mounting plate 1 and the two groups of side mounting plates 4 are connected to the hydraulic support base 40 by bolts, the pressure roller 16 abuts against the push rod 30, and the push rod 30 is arranged on the hydraulic support base 40.

[0040] Preferably, if Figure 4 and Figure 5As shown, an opening 19 is provided below the inner cavity 6 , and the opening 19 passes through the lower side of the top cover plate 5 . The connecting column 8 passes through the opening 19 , so as to facilitate the transmission of the connecting column 8 .

[0041] In some embodiments, Figure 4 As shown, the follower assembly 7 includes a follower plate 71, which is located in the inner cavity 6. The cross-sectional width of the follower plate 71 is greater than the width of the opening 19. An accommodating cavity 72 is provided on the lower side wall of the follower plate 71. A ball 73 is provided in the accommodating cavity 72. The ball 73 abuts against the inner cavity 6. In the process of the electric push rod 3 driving the support frame 11 to move, the spring 18 is provided between the follower assembly 7 and the support frame 11. The spring 18 drives the follower assembly 7 to move laterally with the support frame 11, and the ball 73 rolls in the inner cavity 6 to guide the follower plate 71.

[0042] In some embodiments, Figure 4 As shown, the accommodating cavity 72 is a spherical cavity, the inner wall of the accommodating cavity 72 and the outer wall of the ball 73 are both smooth, and the ball 73 is rollingly arranged in the accommodating cavity 72. The ball 73 rolls in the accommodating cavity 72 to improve rolling smoothness and avoid jamming.

[0043] In some embodiments, Figure 1 and Figure 2 As shown, the guide slot 9 is inclined on the side mounting plate 4, and the lower end of the guide slot 9 is located on the side away from the rear mounting plate 1, and the upper end of the guide slot 9 is located below the rotation axis of the electric push rod 3. In the process of the electric push rod 3 pushing the support frame 11 to move, since the guide slider 10 guides the support frame 11 in the guide slot 9, the support frame 11 moves downward following the angle of the guide slot 9, driving the downward pressure roller 16 to move.

[0044] Specifically, Figure 7 As shown, the support frame 11 is U-shaped, and two groups of support rods 13 pass through two arms of the support frame 11 respectively and are rotatably connected through bearings, so as to facilitate transmission between the support frame 11 and the support rods 13.

[0045] Furthermore, if Figure 2 and Figure 7 As shown, the roller bracket 14 is tilted relative to the support frame 11, and a reinforcing rod 20 is fixed between the side wall of the roller bracket 14 and the side wall of the pressure plate 12 to improve the strength and stability of the roller bracket 14 and facilitate the downward pressing roller 16 to press the push rod 30 downward to lift the bottom.

[0046] A specific application of the present application is: the utility model is suitable for lifting the bottom of the hydraulic support. When in use, the rear mounting plate 1 and two sets of side mounting plates 4 on the device are installed on the hydraulic support base 40, and the lower pressing roller 16 abuts against the push rod 30. In the initial position, the electric push rod 3 remains in a retracted state, such as Figure 1As shown, when the front end of the hydraulic support sinks and the bottom of the hydraulic support needs to be lifted, the electric push rod 3 is started, and the telescopic end of the electric push rod 3 extends to drive the support frame 11 to move away from the rear mounting plate 1. The support frame 11 pushes the pressure plate 12 to move through the support rod 13, and the guide slider 10 slides in the guide slot 9. The pressure plate 12 drives the pressing roller 16 to move through the roller bracket 14 and the roller shaft 15. Since the guide slot 9 is inclined downward, the pressing roller 16 moves obliquely downward, pressing one end of the push rod 30 downward. The hydraulic support bottom lifting operation is performed. While the support frame 11 moves, since the pull ring 17 is hooked to the spring 18, the follower component 7 follows the support frame 11 to move to the side away from the rear mounting plate 1 through the spring 18. At this time, the spring 18 is stretched; when the bottom lifting operation is not needed, the electric push rod 3 contracts to drive the support frame 11 and the downward pressure roller 16 to reset. During the resetting process, the spring 18 contracts due to the elastic force, and a pulling force is applied to the support frame 11, which facilitates the resetting movement of the support frame 11 and avoids the support frame 11 from getting stuck during the resetting movement.

[0047] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only the specific implementation method of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A hydraulic support bottom lifting device, characterized in that: include: A rear mounting plate, a side wall of which is fixedly connected to a push rod hinge seat, and an electric push rod is hingedly connected to the push rod hinge seat; Side mounting plates, the side mounting plates are provided with two groups, the two groups of side mounting plates are arranged on one side of the push rod hinge seat located at the rear mounting plate, a top cover plate is arranged above the side mounting plates, the two groups of side mounting plates are fixedly connected to the lower side of the top cover plate, an inner cavity is provided on the top cover plate, a follower component is provided in the inner cavity, a connecting column is fixedly connected to the bottom of the follower component, a guide slot is provided on the side close to each other of the two groups of side mounting plates, a guide slider is slidably connected in the guide slot; A support frame, one side wall of the support frame is fixedly connected to the telescopic end of the electric push rod, a pressure plate is arranged on the side of the support frame away from the electric push rod, support rods are fixedly connected to the side walls at both ends of the pressure plate, the other ends of the two groups of support rods are respectively fixedly connected to the two groups of guide sliders, a roller bracket is fixedly connected to the roller bracket through a bearing to rotate with a roller shaft, a downward pressure roller is fixedly connected to the roller shaft, pull rings are fixedly connected to the support frame and the connecting column, and a spring is arranged for hooking between the two groups of pull rings opposite to each other.

2. The hydraulic support bottom lifting device according to claim 1 is characterized in that: An opening is provided below the inner cavity, the opening passes through the lower side of the top cover plate, and the connecting column passes through the opening.

3. The hydraulic support bottom lifting device according to claim 2 is characterized in that: The follower assembly includes a follower plate, which is located in the inner cavity. The cross-sectional width of the follower plate is greater than the width of the opening. An accommodating cavity is opened on the lower side wall of the follower plate. A ball is arranged in the accommodating cavity, and the ball abuts against the inner cavity.

4. The hydraulic support bottom lifting device according to claim 3 is characterized in that: The accommodating cavity is a spherical cavity, the inner wall of the accommodating cavity and the outer wall of the ball are both smooth, and the ball is arranged to roll in the accommodating cavity.

5. The hydraulic support bottom lifting device according to claim 1, characterized in that: The guide slide groove is inclinedly arranged on the side mounting plate, and the lower end of the guide slide groove is located at a side away from the rear mounting plate, and the upper end of the guide slide groove is located below the rotation axis of the electric push rod.

6. The hydraulic support bottom lifting device according to claim 1, characterized in that: The support frame is U-shaped, and the two groups of support rods pass through the two arms of the support frame respectively and are rotatably connected through bearings.

7. The hydraulic support bottom lifting device according to claim 1, characterized in that: The roller bracket is arranged obliquely relative to the support frame, and a reinforcing rod is fixedly connected between the side wall of the roller bracket and the side wall of the pressure plate.

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