CN201301717Y

CN201301717Y - Plunger piston suspended-type bending-resistance individual hydraulic prop

Info

Publication number: CN201301717Y
Application number: CNU2008200382398U
Authority: CN
Inventors: 温荣升
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-14
Filing date: 2008-06-14
Publication date: 2009-09-02
Anticipated expiration: 2018-06-14

Abstract

The utility model discloses a plunger piston suspended-type bending-resistance individual hydraulic prop. The top cover of the prop consists of two parts of a four-jaw top cap and a ball-and-socket supporting seat, wherein the lower part of the ball-and-socket supporting seat is connected and fixed with the upper end of a movable prop and a seal cover by three spring pins, the upper end of the ball-and-socket supporting seat is connected with the four-jaw top cap in a floating way, namely, the four-jaw top cap can freely rotate at a certain angle on the ball-and-socket supporting seat; a hemispherical groove is arranged at the center of the upper part of the ball-and-socket supporting seat; a cup head with the diameter being equal to that of the hemispherical groove is arranged at the lower part of the four-jaw top cap; the cup head is inserted in the hemispherical groove and is loosely connected with the hemispherical groove by a bolt, a nut and a washer, and the connecting parts can not affect the four-jaw top cap to rotate freely on the ball-and-socket supporting seat. Eccentric load born by the four-jaw top cap can act on the center of the individual hydraulic prop all the time, thereby avoiding the bending and deformation of the individual hydraulic prop caused by unbalance loading, so as to improve the bending-resistance strength of the prop.

Description

Suspension type of force plunger formula bending resistance hydraulic prop

Technical field

The utility model relates to a kind of mining equiment, is specifically related to the hydraulic Support with Suspending Hollow Plug that the coal-face supporting is used under the coal mine.

Background technology

When known hydraulic prop coal-face under coal mine used, top cover was with the top board of inclination, when articulated roof beam contacts, and top cover one side of pillar is stressed, and the generation eccentric load causes pillar flexural deformation.When flexural stress surpassed YIELD STRENGTH, pillar just produced permanent deformation, can not fall post when causing the pillar prop drawing, has increased a large amount of maintenance costs.Because the hydraulic Support with Suspending Hollow Plug stroke is big, eccentric load causes the pillar buckling phenomenon especially outstanding.

Summary of the invention

The purpose of this utility model is that a kind of suspension type of force plunger formula bending resistance hydraulic prop will be provided, and the top cover of this pillar is made up of four paws top cap and ball-and-socket bearing two parts; Described ball-and-socket bearing bottom is connected and fixed by three resilient keys and described post alive upper end and seal cover, and the upper end is connected with four paws top cap is unsteady, promptly four paws top cap can be on the ball-and-socket bearing free rotating certain angle.The eccentric load that four paws top cap bears acts on the position, center of hydraulic prop all the time, avoids unbalance loading to cause the flexural deformation of hydraulic prop.

The utility model is achieved by the following technical solution: a kind of suspension type of force plunger formula bending resistance hydraulic prop, comprise top cover, the post of living, be installed in the seal cover in the inner chamber of post alive upper end, the cylinder body that is connected with the post of living, the handgrip body triple-use valve that is connected with the post of living with cylinder body, the base that is installed in the cylinder body lower end; It is characterized in that: described top cover is made up of four paws top cap and ball-and-socket bearing two parts; Described ball-and-socket bearing bottom is connected and fixed by three resilient keys and described post alive upper end and seal cover, and the upper end of ball-and-socket bearing is connected with four paws top cap is unsteady, promptly four paws top cap can be on the ball-and-socket bearing free rotating certain angle.

Described ball-and-socket bearing central upper portion position makes the hemisphere groove, and cap bottom, described four paws top makes the hemispherical head that equates with the hemisphere groove diameter; Described hemispherical head is installed in the hemisphere groove, and connection does not between the two influence four paws top cap and freely rotates on the ball-and-socket bearing.

Described hemispherical head is installed in the hemisphere groove, links together with bolt, nut and pad loosely between the two.

Good effect of the present utility model is:

Four paws top cap adopts sphere to contact with the ball-and-socket bearing, connects by bolt, nut, pad, and this connection can not limit relatively rotating of hemispherical head and hemisphere groove.Four paws top cap certain angle free to rotate.When four paws top cap is subjected to eccentric load, its active force is coincided with the center of individual prop all the time, avoid pillar to bear lateral force and produce flexural deformation, improved the flexural strength of pillar.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Figure is the structural representation of an embodiment of the present utility model;

Among the figure: 1, four paws top cap, 1-1, hemispherical head, 2, the ball-and-socket bearing, 2-1, hemisphere groove, 3, resilient key, 4, the post of living, 5, seal cover, 6, nut, 7, pad, 8, bolt, 9, handgrip body triple-use valve, 10, cylinder body, 11, base.

The specific embodiment

As shown in drawings: a kind of suspension type of force plunger formula bending resistance hydraulic prop, comprise top cover, the post 4 of living, the handgrip body triple-use valve 9 that is installed in the seal cover 5 in the post 4 upper end inner chambers alive, the cylinder body 10 that is connected with the post 4 of living, is connected with work post 4 with cylinder body 10, the base 11 that is installed in cylinder body 10 lower ends; It is characterized in that: described top cover is made up of four paws top cap 1 and ball-and-socket bearing 2 two parts; Described ball-and-socket bearing 2 bottoms are connected and fixed by three resilient keys 3 and described post alive 4 upper ends and seal cover 5, the upper end of ball-and-socket bearing 2 and 1 unsteady connection of four paws top cap, promptly four paws top cap 1 can be on ball-and-socket bearing 2 free rotating certain angle.

Described ball-and-socket bearing 2 central upper portion positions make hemisphere groove 2-1; Cap 1 bottom, described four paws top makes the hemispherical head 1-1 with hemisphere groove 2-1 equal diameters, hemispherical head 1-1 is installed among the hemisphere groove 2-1, link together with bolt 8, nut 6 and pad 7 looselys between the two, connector does not influence four paws top cap 1 and freely rotates on ball-and-socket bearing 2.When four paws top cap 1 was subjected to eccentric load, its active force coincided with the center of individual prop all the time, avoided pillar to bear lateral force and produced flexural deformation, had improved the flexural strength of pillar.

Claims

1, a kind of suspension type of force plunger formula bending resistance hydraulic prop, comprise top cover, the post (4) of living, be installed in the seal cover (5) in the inner chamber of post alive (4) upper end, the cylinder body (10) that is connected with the post (4) of living, the handgrip body triple-use valve (9) that is connected with the post (4) of living with cylinder body (10), the base (11) that is installed in cylinder body (10) lower end; It is characterized in that: described top cover is made up of four paws top cap (1) and ball-and-socket bearing (2) two parts; Described ball-and-socket bearing (2) bottom is connected and fixed by three resilient keys (3) and described post alive (4) upper end and seal cover (5), float with four paws top cap (1) and be connected in the upper end of ball-and-socket bearing (2), promptly four paws top cap (1) can be gone up free rotating certain angle at ball-and-socket bearing (2).

2, suspension type of force plunger formula bending resistance hydraulic prop according to claim 1, it is characterized in that: described ball-and-socket bearing (2) central upper portion position makes hemisphere groove (2-1), and described four paws top cap (1) bottom makes the hemispherical head (1-1) with hemisphere groove (2-1) equal diameters; Described hemispherical head (1-1) is installed in the hemisphere groove (2-1), and connection does not between the two influence four paws top cap (1) and freely rotates on ball-and-socket bearing (2).

3, suspension type of force plunger formula bending resistance hydraulic prop according to claim 2, it is characterized in that: described hemispherical head (1-1) is installed in the hemisphere groove (2-1), uses bolt (8), nut (6) and pad (7) loosely to link together between the two.