Pushing and bottom lifting mechanism suitable for fully-sealed hydraulic support base

Abstract

The utility model discloses a pushing and bottom lifting mechanism suitable for a fully sealed hydraulic support base, and relates to the technical field of coal mine hydraulic supports, the pushing and bottom lifting mechanism comprises a pushing mechanism and a bottom lifting mechanism, the pushing mechanism comprises a connector, a push rod, a connecting seat, a pushing jack and a pushing seat, the push rod is composed of two parallel cross rods, and the connecting seat is connected with the pushing jack. One end of the push rod is connected with a scraper through the connector, the other end of the push rod is rotationally connected with a base of a hydraulic support through a pushing seat, and a pushing jack rotationally connected with the pushing seat is arranged between transverse rods of the push rod. One end, far away from the pushing seat, of the pushing jack is rotationally connected with a scraper through the connecting seat; the hydraulic support has the beneficial effects that the pushing mechanism and the bottom lifting mechanism are redesigned, the push rod is used as a bottom lifting fulcrum, the front foot of the base is lifted to move forwards by adjusting the bottom lifting jack, and the problem that a hydraulic support in a semi-sealed bottom or full-sealed bottom form does not have a bottom lifting function is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine hydraulic supports, in particular to a bottom pushing and lifting mechanism suitable for a base of a fully bottom sealed hydraulic support. Background Art

[0002] Coal mine hydraulic support is one of the important equipment in comprehensive mining equipment. In addition to effectively protecting the safety of personnel in the coal mining face, it is also the main equipment for high production and efficiency of the comprehensive mining face. The hydraulic support bottom lifting mechanism can ensure that the support can quickly and accurately adjust the support position, ensure the synchronous movement of the support and the coal mining machine, help improve coal mining efficiency, increase production, and reduce unnecessary downtime.

[0003] At present, only a small number of patent documents disclose the design of the bottom lifting mechanism of the semi-enclosed or fully enclosed bottom base hydraulic support, such as patent number CN209483404U (horizontal scissor-type bottom lifting mechanism), which discloses a bottom lifting mechanism suitable for thin coal seams. The bottom lifting jack is arranged horizontally. When the bottom needs to be lifted, the bottom lifting jack is retracted, and the bottom lifting top frames on both sides contact the push rod, and the base is lifted; when the bottom does not need to be lifted, the bottom lifting jack is extended to the maximum state, and the bottom lifting top frames on both sides are retracted to keep parallel with the jack; in this way, the bottom lifting effect is achieved, but there are the following problems:

[0004] 1. It is not suitable for bases with semi-enclosed or fully enclosed bottom structures. The principle of horizontal bottom lifting is that the top frame of the bottom lifting acts on the push rod to press down and lift the base, provided that the base must be fully open to ensure that the push rod is in full contact with the ground. However, the front part of the bottom plate of the semi-enclosed or fully enclosed bottom base has a box-shaped part, and the push rod is placed above it, so the bottom lifting device cannot be arranged.

[0005] 2. Unbalanced force. The bottom lifting jack is connected to the bottom lifting frames on both sides. During the bottom lifting process, the bottom lifting frame is perpendicular to the direction of the push rod; when the bracket moves forward, the push rod gives the bottom lifting frame a lateral force. Under the action of the lateral force, the probability of damage to the frame increases.

[0006] 3. Small lifting amount. Compared with the vertical lifting mechanism, the lifting frame of the horizontal lifting mechanism is a horizontal scissor structure. Under the same jack stroke, the height of the front foot of the base is not as high as that of the vertical lifting mechanism. Utility Model Content

[0007] The purpose of the utility model is to provide a bottom pushing and lifting mechanism suitable for the base of a fully bottom-sealed hydraulic support in order to solve the above-mentioned problem.

[0008] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0009] A pushing and bottom-lifting mechanism suitable for the base of a fully bottom-enclosed hydraulic support, comprising a pushing mechanism and a bottom-lifting mechanism, characterized in that: the pushing mechanism comprises a connecting head, a push rod, a connecting seat, a pushing jack and a pushing seat, the push rod is composed of two parallel cross bars, one end of the push rod is connected to a scraper through the connecting head, the other end of the push rod is rotatably connected to the pushing seat, the pushing seat is clamped on the base of the hydraulic support and moves, a pushing jack rotatably connected to the pushing seat is arranged between the cross bars of the push rod, and the push rod is composed of two parallel cross bars. The end of the shifting jack away from the pushing seat is rotatably connected to the scraper through the connecting seat; the bottom lifting mechanism includes a pressure shaft, a pressure plate and a bottom lifting jack, the pressure plate is arranged on the base corresponding to the positions on both sides of the push rod, the middle lower part of the pressure plate is rotatably connected to the base, the pressure plate close to the scraper is fixedly installed with a pressure shaft, the pressure shaft extends to above the push rod, the end of the pressure plate close to the pushing seat is rotatably connected to the bottom lifting jack, and the bottom lifting jack is rotatably connected to the base at one end away from the pressure plate.

[0010] Preferably, the pressing shaft is cylindrical in shape.

[0011] Preferably, the side shape of the pressing plate is V-shaped.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. It can be applied to the base with semi-bottom cover or full-bottom cover structure, so that the speed of the hydraulic support and the scraper as a whole can be improved;

[0014] 2. The bottom lifting mechanism does not occupy the front pedestrian passage, so there is plenty of space;

[0015] 3. The sliding mechanism is simpler and uses less materials;

[0016] 4. Good effect in preventing the base from piercing the bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 labor.

[0018] Figure 1 The utility model is a structural schematic diagram of a bottom-lifting mechanism suitable for a fully bottom-sealed hydraulic support base.

[0019] Figure 2 The utility model is a diagram showing the use state of a pushing and lifting bottom mechanism suitable for a base of a fully bottom-enclosed hydraulic support.

[0020] Figure 3 The utility model is a schematic diagram of the top view of the base of the pushing and lifting bottom mechanism suitable for the base of the fully bottom-sealed hydraulic support.

[0021] The following are the descriptions of the reference numerals:

[0022] 10. Hydraulic support; 1. Connecting head; 2. Push rod; 3. Pressure shaft; 4. Connecting seat; 5. Pressure plate; 6. Bottom lifting jack; 7. Sliding jack; 8. Sliding seat; 9. Base; 20. Scraper. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] The utility model is further described below in conjunction with the accompanying drawings:

[0026] like Figure 1-Figure 3As shown, a bottom-lifting mechanism for a fully bottom-enclosed hydraulic support base includes a pushing mechanism and a bottom-lifting mechanism. The pushing mechanism includes a connector 1, a push rod 2, a connecting seat 4, a pushing jack 7 and a pushing seat 8. The push rod 2 is composed of two parallel cross bars. One end of the push rod 2 is connected to the scraper 20 through the connector 1, and the other end of the push rod 2 is rotatably connected to the pushing seat 8. The pushing seat 8 is clamped on the base 9 of the hydraulic support 10 and moves. A push rod 2 is provided between the cross bars to connect to the push rod 2. The bottom lifting mechanism includes a pressure shaft 3, a pressure plate 5 and a bottom lifting jack 6. The pressure plate 5 is arranged on the base 9 at positions corresponding to both sides of the push rod 2. The side shape of the pressure plate 5 is V-shaped. The middle lower part of the pressure plate 5 is rotatably connected to the base 9. The pressure shaft 3 is fixedly installed at one end of the pressure plate 5 close to the scraper 20. The pressure shaft 3 is cylindrical and extends to the push rod 2. Above the rod 2, the end of the pressing plate 5 close to the push seat 8 is rotated to connect the bottom lifting jack 6, and the end of the bottom lifting jack 6 away from the pressing plate 5 is rotated to connect to the base 9; when it is necessary to complete the pulling action, the bottom lifting jack 6 extends, pushes the pressing plate 5 to rotate counterclockwise, so that the pressing shaft 3 on the pressing plate 5 rotates and presses down, and the front foot of the base 9 is lifted with the push rod 2 as the fulcrum to complete the bottom lifting action, and then the push jack 7 extends, pushes the push seat 8, drives the push rod 2 to move backward, and the scraper 20 is fixed , so the bracket is pulled forward; when the pushing and sliding action needs to be completed, the bottom lifting jack 6 is retracted, and the pressure plate 5 is pulled to rotate clockwise, so that the pressure shaft 3 on the pressure plate 5 rotates and rises, and the base 9 gradually decreases until the pressure shaft 3 is separated from the push rod 2, the hydraulic support 10 is supported and fixed, the pushing jack 7 is retracted, and the pushing seat 8 is pulled forward, so that the push rod 2 moves forward and pushes the scraper 20 to move forward; repeating the action can realize the pushing of the scraper 20 and the hydraulic support 10.

[0027] Working principle: This device can push the pressure plate 5 to rotate with the push rod 2 as the fulcrum through the bottom lifting jack 6, control the extension and retraction of the bottom lifting jack 6 to realize the lifting and falling of the front foot of the base 9, and then control the push jack 7 to complete the forward movement of the hydraulic support 10.

[0028] The hydraulic support 10 and the scraper 20 are both universal standard parts or parts known to those skilled in the art. Their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods, so they will not be described in detail here.

[0029] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements shall fall within the scope of the utility model to be protected.

Claims

1. A pushing and lifting mechanism for the base of a fully bottom-enclosed hydraulic support, comprising a pushing mechanism and a lifting mechanism, characterized in that: The pushing mechanism comprises a connecting head (1), a push rod (2), a connecting seat (4), a pushing jack (7) and a pushing seat (8); the push rod (2) is composed of two parallel cross bars; one end of the push rod (2) is connected to the scraper (20) through the connecting head (1); the other end of the push rod (2) is rotatably connected to the pushing seat (8); the pushing seat (8) is clamped on the base (9) of the hydraulic support (10) and moves; a pushing jack (7) rotatably connected to the pushing seat (8) is arranged between the cross bars of the push rod (2); one end of the pushing jack (7) away from the pushing seat (8) is rotatably connected to the scraper (20) through the connecting seat (4); The bottom lifting mechanism comprises a pressure shaft (3), a pressure plate (5) and a bottom lifting jack (6); the pressure plate (5) is arranged on the base (9) at positions corresponding to both sides of the push rod (2); the lower middle part of the pressure plate (5) is rotatably connected to the base (9); the pressure shaft (3) is fixedly installed at one end of the pressure plate (5) close to the scraper (20); the pressure shaft (3) extends to above the push rod (2); the end of the pressure plate (5) close to the push seat (8) is rotatably connected to the bottom lifting jack (6); the end of the bottom lifting jack (6) away from the pressure plate (5) is rotatably connected to the base (9).

2. The bottom-lifting mechanism for a fully bottom-enclosed hydraulic support base according to claim 1, characterized in that: The pressing shaft (3) is cylindrical in shape.

3. The bottom-lifting mechanism for a fully bottom-enclosed hydraulic support base according to claim 1, characterized in that: The side shape of the pressing plate (5) is V-shaped.

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