CN101526005B - Skid shoe type bottom raising mechanism of hydraulic support - Google Patents

Abstract

The invention discloses a skid shoe type bottom raising mechanism of a hydraulic support, which comprises a bottom raising jack and a top frame, wherein the upper part of the bottom raising jack is connected with the top frame which is connected with a base of the hydraulic support, a push rod is arranged under the bottom raising jack, and the lower part of the bottom raising jack is provided with a skid shoe which is used for reducing a friction coefficient when the bottom raising jack is in contact with the push rod. When the skid shoe moves the hydraulic support, the friction coefficient of the contact surface of the skid shoe and the push rod is smaller, push power for pushing the jack to move the hydraulic support is reduced, consequently, a horizontal component which acts on the bottom raising jack is reduced, and the service life of the whole bottom raising mechanism is prolonged.

Description

Sliding shoe type lifting mechanism of hydraulic support

technical field

The invention relates to a hydraulic support for supporting equipment in fully mechanized mining working faces of coal mines, in particular to a bottom lifting mechanism of the hydraulic support.

Background technique

Hydraulic supports are frequently used in coal mine fully mechanized mining face. When the self-weight of the hydraulic support is large or the bottom plate of the working surface where it is located is soft, the base of the hydraulic support is easy to sink into the bottom plate, and the phenomenon of gnawing at the bottom will occur when the frame is moved, making it difficult to move the frame. At this time, the bottom-lifting mechanism can be used. The traditional bottom-lifting mechanism includes a bottom-lifting jack and a push rod. , making the hydraulic support move smoothly. In the process of moving the frame, the friction force between the lifting jack and the push rod is very large. To overcome this friction force, the moving jack exerts a large horizontal force on the lifting jack, which makes the lifting jack very easy to damage and has a long service life. short. Secondly, the above-mentioned bottom lifting mechanism, the bottom lifting jack and the top frame are connected in plane contact, so that when the bottom lifting jack is strained during the working process, the stress on the joint surface will deteriorate, so that the proper performance cannot be achieved.

Contents of the invention

The object of the present invention is to provide a sliding shoe type bottom lifting mechanism, which has a small friction force between the bottom lifting jack and the push rod, and has a long service life of the bottom lifting jack.

The technical solution that the present invention adopts for realizing the above object is:

The sliding shoe type bottom lifting mechanism of the hydraulic support includes a bottom lifting jack and a top frame connected with the upper part of the bottom lifting jack. The top frame is connected with the base of the hydraulic support, and a push rod is arranged under the bottom lifting jack; Sliding shoe for reducing the coefficient of friction when the lifting jack contacts the push rod.

The above-mentioned sliding shoe is hinged with the lifting jack, and the sliding shoe is connected with the lifting jack through two vertical pins and cooperating with the R-shaped pin.

The bottom of the above-mentioned sliding boot is a smooth curved surface, and the front and rear ends are upwardly tilted.

The end of the piston rod of the lifting jack mentioned above is a spherical surface, which is in spherical contact with the ball socket of the top frame, and is connected with bolts; the diameter of the ball socket of the top frame is slightly smaller than the diameter of the spherical surface of the piston rod end, so that the contact part has a strain after stress Clearance.

The bases on the left and right sides of the bottom lifting jack are provided with vertical concave slideways, and the convex parts on the left and right sides of the bottom lifting jack are embedded in the concave slideways.

The top frame is connected with the base of the hydraulic support through two horizontal pin shafts.

Beneficial effects of the present invention:

1. The lower part of the lifting jack of this kind of sliding shoe type bottom lifting mechanism has a sliding shoe, and the sliding shoe and the bottom lifting jack are connected by hinges. During the moving process of the sliding shoe, the friction coefficient between the contact surface of the sliding shoe and the push rod is very small, the thrust required to move the jack to move the hydraulic support becomes smaller, and then the horizontal component force acting on the lifting jack is reduced, so that The service life of the whole lifting mechanism is extended.

2. The end of the piston rod of the lifting jack is a spherical surface, which is in spherical contact with the ball socket of the top frame, and is connected with bolts; the diameter of the ball socket of the top frame is slightly smaller than the diameter of the spherical surface of the end of the piston rod, so that the contact part remains under force. The gap of the strain makes the overall stress on the joint surface uniform, prevents structural damage caused by excessive pressure, and meets the high-strength and high-reliability working requirements of the bottom lifting mechanism.

Description of drawings

Fig. 1 is the structural schematic diagram of the sliding shoe type lifting mechanism of hydraulic support;

Fig. 2 is the side view of Fig. 1;

FIG. 3 is an enlarged schematic view of the structure in direction A in FIG. 2 .

The present invention is described in detail below in conjunction with accompanying drawing:

Detailed ways

With reference to Figure 1, Figure 2, and Figure 3, the sliding shoe type bottom lifting mechanism of the hydraulic support includes a bottom lifting jack 1 and a top frame 2 connected to the upper part of the bottom lifting jack, and the end of the bottom lifting jack piston rod 3 is a spherical surface, and The balls and sockets of the top frame are joined by spherical surfaces and connected by bolts 4. The diameter of the ball sockets of the top frame is slightly smaller than the diameter of the spherical surface at the end of the piston rod, so that there is a gap of strain in the contact part. The top frame 2 is connected with the base 6 of the hydraulic support through two horizontal bearing pins 5, and a push rod 7 is arranged below the lifting jack. The lower part of the lifting jack 1 is provided with a sliding shoe 8 for reducing the coefficient of friction when the bottom lifting jack contacts the push rod. The bottom of the sliding shoe 8 is a smooth curved surface, and the front and rear ends are upturned. Sliding shoe 8 is hinged together with the lifting jack, and sliding shoe 8 is connected with the lifting jack by two vertical bearing pins 9 and cooperates R type pin 10. Vertically concave slideways 11 are arranged on the bases on the left and right sides of the lifting jack 1 , and the convex parts on the left and right sides of the bottom lifting jack 1 are embedded in the concave slideways 11 .

The working process of the sliding shoe type bottom lifting mechanism of the hydraulic support will be described below. When the hydraulic support needs to be moved, at first the bottom lifting jack 1 is extended, and the bottom lifting jack 1 extends down the concave slideway 11, and the hydraulic support base 6 is lifted up with the push rod 7 as the fulcrum. At this moment, the sliding shoe 8 is in contact with the push rod 7, and the friction coefficient between the contact surfaces of the sliding shoe 8 and the push rod 7 is very small, so the thrust required for moving the hydraulic support by the jack 12 becomes smaller, and the rack moving operation is easily completed.

Because the thrust required for moving the hydraulic support by the push jack 12 becomes smaller, the horizontal force to the bottom lifting jack in the frame moving process is greatly reduced, and the bottom lifting jack is protected to the greatest extent.

Of course, the above descriptions are not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention shall also belong to the present invention. protection scope of the invention.

Claims (2)

1. the skid shoe type bottom raising mechanism of hydraulic support, comprise lift end jack with lift the upper frame that jack top, the end is connected, upper frame is connected with the base of hydraulic support, lifts jack below, the end and is provided with push rod; It is characterized in that: said bottom of lifting end jack is provided with piston shoes; Said piston shoes are with to lift end jack hinged, and piston shoes are through two vertical bearing pins and cooperate R type pin and lift end jack and be connected; Said piston shoes bottom is a smooth surface, and the rear and front end is upturned; Said end of lifting end jack piston rod is a sphere, with between the upper frame ball-and-socket for sphere contacts, and connect with bolt; Upper frame ball-and-socket diameter is slightly less than the diameter of piston rod end sphere, makes the contact site leave the gap of stressed back strain; The said base of lifting the jack left and right sides, the end is provided with the spill slideway of vertical direction, and the protuberance of lifting the jack left and right sides, the end is embedded in the spill slideway.

2. the skid shoe type bottom raising mechanism of hydraulic support according to claim 1 is characterized in that: said upper frame is connected with the base of hydraulic support through two horizontal bearing pins.

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