CN204827503U - Lift end mechanism and have this hydraulic support who lifts end mechanism - Google Patents

Abstract

The utility model discloses a bottom lifting mechanism and a hydraulic support with the bottom lifting mechanism. The bottom-lifting mechanism includes a supporting bridge, a bottom-lifting jack and a supporting ear plate. Wherein the cylinder body of the lifting jack is rotatably installed on the supporting bridge; the piston rod of the lifting jack is rotatably installed on the supporting ear plate; the supporting bridge is fixed on the two front parts of the hydraulic support base On the side box, it replaces the conventional plate bridge at the front of the base; the support ear plate is fixed on the push rod of the hydraulic support. The bottom lifting jack swings back and forth with the hinge point of the bottom lifting jack and the supporting bridge as the axis; during the process of pushing the push rod of the hydraulic support, the piston rod of the bottom lifting jack is retracted; when the hydraulic support is moved forward, the piston rod of the bottom lifting jack goes out Stretch, so as to achieve the purpose of lifting the bottom. Compared with the prior art, the utility model eliminates the problems of friction and wear between the bottom lifting jack and the hydraulic support push rod due to the design that the lower end of the bottom lifting jack is hinged with the hydraulic support push rod.

Description

Bottom lifting mechanism and hydraulic support with the bottom lifting mechanism

technical field

The utility model relates to a bottom lifting mechanism and a hydraulic support with the bottom lifting mechanism, in particular to a hydraulic support for fully mechanized coal mining face.

Background technique

At present, the hydraulic support is the main support equipment for the fully mechanized mining face of the coal mine. Due to the complex geological conditions in most underground wells, the floor is mostly soft and easily muddy mudstone or argillaceous sandstone. During the use of the hydraulic support, the front end of the base is easy to stick to the bottom, that is, the front end of the hydraulic support base sinks into the coal seam floor, and the support cannot be normally stretched (forward movement) ), affecting the normal fully mechanized mining work. In actual operation, when the front end of the hydraulic support sinks, the bottom lifting mechanism is generally used to lift the front end. The process is as follows: the bottom lifting mechanism pushes the push rod set in the inner crotch of the hydraulic support. Since the push rod directly contacts the coal seam floor, The front end of the hydraulic support will be lifted, and then the hydraulic support will move forward smoothly through the action of the pushing jack hinged between the base of the hydraulic support and the push rod.

The traditional hydraulic support bottom lifting mechanism Chinese patent (patent number: CN201381869Y and CN101526005B), including the load frame fixed on the bridge in front of the base, the bottom lift jack; the end of the bottom lift jack piston rod is hinged with the load frame; the bottom lift jack left and right The bases on both sides are provided with vertical concave slides, and the convex parts on the left and right sides of the bottom lifting jack are embedded in the concave slides, or the bottom lifting jack is set on the guide sleeve fixed on the bridge in front of the base Inside. When it is necessary to lift the bottom, the bottom lifting jack is extended, and the bottom of the cylinder of the bottom lifting jack acts on the upper plane of the push rod of the hydraulic support, thereby lifting the front end of the base. The plane is always in a state of contact friction. In order to avoid damage to the jack caused by direct friction between the bottom of the jack and the push rod, put a slipper or a wear-resistant jacket on the bottom of the jack. The disadvantages of this kind of bottom-lifting mechanism: the friction between the bottom-lifting jack and the push rod is not really eliminated, and when the bottom-lifting jack, sliding boots or wear-resistant coats are damaged, it will also be caused by the friction between the bottom-lifting jack and the push rod. The friction force between them makes the lifting jack produce a backward bending moment, which causes the lifting jack to be subjected to radial force and cause liquid leakage.

Contents of the invention

In order to overcome the above-mentioned defects and deficiencies of the prior art, the purpose of this utility model is to provide a method to avoid the friction between the cylinder bottom and the push rod of the bottom lift jack and the phenomenon of liquid leakage of the bottom lift jack, so as to prolong the service life of the bottom lift jack. To solve the problem of friction between the existing bottom lifting mechanism and the hydraulic support push rod.

In order to achieve the above object, the technical scheme of the utility model is:

The bottom-lifting mechanism includes a supporting bridge, a bottom-lifting jack, and a supporting ear plate. The cylinder body of the bottom-lifting jack is hinged and fixed on the supporting bridge; the piston rod of the bottom-lifting jack is hinged and fixed on the supporting ear plate.

The cylinder body of the bottom lifting jack is hinged and fixed on the supporting bridge through the first pin shaft, and the first pin shaft is fixed with a D-shaped pin; the piston rod of the bottom lifting jack is hinged and fixed on the supporting ear plate through the second pin shaft, The second bearing pin is fixed with a D-type pin.

A hydraulic support with a bottom lifting mechanism, including: a bottom lifting mechanism, the supporting bridges on the bottom lifting mechanism are fixed on the boxes on both sides of the front part of the hydraulic support base, and the support ear plates are welded and fixed on the push rod of the hydraulic support .

When the push rod of the hydraulic support is retracted, the bottom lifting jack is tilted backwards, and the longitudinal axis b of the bottom lifting jack forms an acute angle with the longitudinal axis a of the hydraulic support. The horizontal distance between the hinge point of the bottom jack and the supporting lug is c; when the push rod of the hydraulic support is extended, the bottom jack is tilted forward, and the longitudinal axis b of the bottom jack forms an acute angle with the longitudinal axis a of the hydraulic support. At this time, the horizontal distance from the hinge point between the lifting jack and the supporting bridge to the hinge point between the lifting jack and the supporting ear plate is d; When the support push rod is extended and retracted to the limit position, the sum of dimension c and dimension d is equal to the stroke of the push jack, which is also equal to the step distance of the hydraulic support.

Working principle of the present utility model and beneficial effect are:

The utility model provides a bottom-lifting mechanism. The cylinder body of the bottom-lifting jack is rotatably installed on the supporting bridges of the boxes on both sides of the front part of the fixed hydraulic support base, and the piston rod of the bottom-lifting jack is rotatably mounted on the push rod fixed on the hydraulic support. On the upper support lug plate, the bottom lifting jack swings back and forth with the hinge point of the bottom lifting jack and the supporting bridge as the axis; during the process of pushing the push rod of the hydraulic support, the piston rod of the bottom lifting jack is retracted, and when the hydraulic support is moved forward, The piston rod of the lifting jack is stretched out, so as to realize the purpose of lifting the bottom.

Compared with the prior art, the design that the lower end of the lifting jack and the push rod of the hydraulic support are hinged together not only eliminates the problem of friction and wear between the lifting jack and the push rod of the hydraulic support, or the problem of friction and wear between the lifting jack and the hydraulic support push rod. The friction and wear of the intermediary between the rods can eliminate the phenomenon of liquid leakage caused by the radial force of the jack at the same time. It has a simple structure, a large lifting distance, and is easy to install and maintain.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the utility model for lifting the bottom mechanism installed on the hydraulic support;

Fig. 2 is the exploded view of the embodiment of the bottom lifting mechanism of the utility model;

Fig. 3 is a schematic diagram of the optimal inclination angle arrangement of the bottom lifting jack when the hydraulic support push rod is retracted in the embodiment of the bottom lifting mechanism of the present invention;

Fig. 4 is a schematic diagram of the optimal inclination angle arrangement of the bottom lifting jack when the push rod of the hydraulic support is extended in the embodiment of the bottom lifting mechanism of the present invention.

Explanation of reference signs:

In Figure 1-Figure 4, 1 is the supporting bridge, 2 is the lifting jack, 3 is the supporting lug, 4 is the base, 5 is the push rod of the hydraulic support, 6 is the pushing jack, 7 is the pin shaft, and 8 is D type Pin, 9 are bearing pins, 10 are D type pins, 21 are jack cylinder blocks at the bottom, and 22 are jack piston rods at the bottom.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail by embodiment:

Referring to Fig. 1 and Fig. 2, the bottom-lifting mechanism of the present utility model includes: a supporting bridge 1, a bottom-lifting jack 2 and a supporting ear plate 3. The support bridge 1 on the bottom lifting mechanism is welded and fixed on the box bodies on both sides of the front part of the base 4, replacing the conventional plate bridge at the front part of the base. The cylinder body 21 of the bottom lifting jack is hinged and fixed on the supporting bridge 1 through the pin shaft 7 , and the piston rod 22 of the bottom lifting jack is hinged and fixed on the support ear plate 3 through the pin shaft 9 . The support ear plate 3 is welded and fixed on the push rod 5 of the hydraulic support. Bearing pin 7 is fixed with D-type pin 8, and bearing pin 9 is fixed with D-type pin 10.

Referring to Fig. 3, when the push rod 5 of the hydraulic support is retracted, the bottom lift jack 2 is arranged to be inclined backward, and its longitudinal axis b forms an acute angle with the longitudinal axis a of the hydraulic support, where a is the longitudinal axis of the hydraulic support and b is the bottom lift jack On the longitudinal axis, the horizontal distance from the hinge point between the bottom lifting jack 2 and the supporting bridge 1 to the hinge point between the bottom lifting jack 2 and the supporting lug 3 is c.

Referring to Fig. 4, when the push rod 5 of the hydraulic support is extended, the lifting jack 2 is tilted forward, and its longitudinal axis b forms an acute angle with the longitudinal axis a of the hydraulic support. At this time, the lifting jack 2 and the supporting bridge 1 The horizontal distance from the hinge point to the hinge point of the lifting jack 2 and the support ear plate 3 is d.

Referring to Fig. 3 and Fig. 4, the bottom lift jack 2 swings back and forth with the hinge point between the bottom lift jack 2 and the supporting bridge 1 as the axis, and when the push rod 5 retracts and extends to the limit position, the sum of dimension c and dimension d is equal to the push rod 5 The stroke of jack 6 is also equal to the frame-moving step distance of hydraulic support.

During use, in the process of pushing the jack 6 to push the push rod 5 of the hydraulic support, the piston rod 22 of the bottom lifting jack is retracted, and when the hydraulic support is moved forward, the piston rod 22 of the bottom lifting jack is stretched out, thereby realizing the purpose of lifting the bottom; When the lifting jack piston rod 22 needs to stretch out and lift the bottom, in the pipeline connection design, it can be designed as linkage control with the moving jack 6 .

Compared with the existing bottom lifting mechanism, the utility model has the following advantages:

1) Compared with the prior art, the design that the lower end of the lifting jack and the push rod are hinged together can eliminate the friction and wear between the lifting jack and the hydraulic support push rod, or eliminate the push between the bottom lifting jack and the hydraulic support. Friction and wear problems in the intermediary between the rods.

2) Only the lifting jack is the movable part of the whole mechanism, and the structure is simple and reliable. The bottom lifting jack swings back and forth and expands axially with the push rod, so that the bottom lifting jack is not subject to radial moment, which can eliminate the phenomenon of liquid leakage caused by the radial force on the bottom lifting jack, and the mechanism has high reliability.

3) The structure of this embodiment is simple, the lifting distance is large, and the connecting parts adopt the pin shaft and D-type card connection mode, which is not easy to rust, has high reliability, and is easy to disassemble.

The utility model also proposes a hydraulic support. The hydraulic support is provided with the above-mentioned lifting mechanism. The longitudinal center planes coincide. Among them, the supporting bridge 1 is horizontally fixed on the boxes on both sides of the front part of the hydraulic support base, replacing the conventional plate bridge at the front of the base; The piston rod 22 is rotatably mounted on the support lug 3 fixed on the hydraulic support push rod 5 . Since the bottom lifting mechanism has the above-mentioned effects, the hydraulic support with the bottom lifting mechanism also has corresponding technical effects, and the present invention will not repeat them here.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (4)

1. Bottom-lifting mechanism, including a supporting bridge (1), a bottom-lifting jack (2), and a supporting ear plate (3), characterized in that the cylinder (21) of the bottom-lifting jack (2) is hinged and fixed to the support On the bridge (1); the piston rod (22) of the lifting jack (2) is hinged and fixed on the support ear plate (3). 2. The bottom lifting mechanism according to claim 1, characterized in that the cylinder body (21) of the bottom lifting jack (2) is hinged and fixed on the supporting bridge (1) through the first pin shaft (7), The first pin (7) is fixed with a D-shaped pin (8); the piston rod (22) of the lifting jack (2) is hinged and fixed on the support lug (3) through the second pin (9), and the second pin Axle (9) is fixed with D type pin (10). 3. The hydraulic support with a bottom lifting mechanism is characterized in that it includes a bottom lifting mechanism, and the supporting bridge (1) on the bottom lifting mechanism is fixed on the boxes on both sides of the front part of the hydraulic support base (4). The supporting ear plate (3) is welded and fixed on the push rod (5) of the hydraulic support. 4. The hydraulic support with a bottom-lifting mechanism according to claim 3, characterized in that, when the push rod (5) of the hydraulic support is retracted, the bottom-lifting jack (2) is tilted backward, and the bottom-lifting jack (2) The longitudinal axis (b) of the hydraulic support forms an acute angle with the longitudinal axis (a) of the hydraulic support. At this time, the hinge point between the lifting jack (2) and the supporting bridge (1) reaches the bottom lifting jack (2) and the supporting lug (3) The horizontal distance of the hinge point is (c); when the push rod (5) of the hydraulic support is extended, the lifting jack (2) is tilted forward, and the longitudinal axis (b) of the lifting jack (2) is in line with the hydraulic support The vertical axis (a) of the vertical axis (a) forms an acute angle. At this time, the horizontal distance from the hinge point between the lifting jack (2) and the supporting bridge (1) to the hinge point between the lifting jack (2) and the supporting ear plate (3) is (d ); the lifting jack (2) swings back and forth with the hinge point of the bottom lifting jack (2) and the supporting bridge (1) as the axis, when the hydraulic support push rod (5) retracts and extends to the limit position, the dimension (c) The sum of the dimension (d) is equal to the stroke of the push jack (6), and also equals the step distance of the hydraulic support.