CN210264587U

CN210264587U - Drill carriage hydraulic chuck for coal mine

Info

Publication number: CN210264587U
Application number: CN201921123306.0U
Authority: CN
Inventors: 张亦涛; 冯金仓; 王佳豪; 魏长松
Original assignee: Shijiazhuang Boan Coal Mine Equipment Manufacture Co ltd
Current assignee: Shijiazhuang Boan Coal Mine Equipment Manufacture Co ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-04-07
Anticipated expiration: 2029-07-17

Abstract

The utility model discloses a drill carriage hydraulic chuck for coal mine, including the drum shell and the slip seat, slips group and dish spring that set up in the drum shell, the slip seat overlaps in the slips group outside, slip seat surface is the face of cylinder, laminate with drum shell inner wall, slip seat internal surface is the circular conical surface, laminate with slips group outer wall, the one end of drum shell is provided with the transition end cover through the bolt, the one end and the transition end cover butt of dish spring, the other end and the slip seat butt of dish spring, be provided with the front end housing through the bolt on the transition end cover, the front end housing is with the front end butt of slips group, the other end of drum shell is provided with the rear end housing through the bolt, the rear end housing is with the rear end butt of slips group; the cylinder shell, the slip seat and the rear end cover surround to form an oil cavity, and the rear end cover is provided with an oil hole communicated with the oil cavity. The utility model discloses the clamp force is big, and reliable operation compares common packing element formula chuck on the market, receives the temperature influence little, and the reliability is high, and the life-span is longer.

Description

Drill carriage hydraulic chuck for coal mine

Technical Field

The utility model relates to a colliery mechanical equipment technical field especially relates to a drill carriage hydraulic chuck for coal mine.

Background

The chuck used for the mining drill carriage in the current market is mainly of a rubber cylinder type, and firstly, the chuck is greatly influenced by temperature, and the rubber cylinder can deform to cause the reduction of sealing performance due to lower temperature in winter in the north; secondly, the device is easy to be extruded by other parts in the using process, thereby causing deformation and even damage and having low service life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a safe and reliable's drill carriage hydraulic chuck for coal mine to above-mentioned prior art not enough.

In order to solve the above problems, the utility model adopts the following technical proposal:

a hydraulic chuck of a drill carriage for a coal mine comprises a cylindrical shell, and a slip seat, a slip group and a disc spring which are arranged in the cylindrical shell, wherein the slip seat is sleeved outside the slip group, the outer surface of the slip seat is a cylindrical surface and is attached to the inner wall of the cylindrical shell, the inner surface of the slip seat is a conical surface and is attached to the outer wall of the slip group, one end of the cylindrical shell is provided with a transition end cover through a bolt, one end of the disc spring is abutted against the transition end cover, the other end of the disc spring is abutted against the slip seat, the transition end cover is provided with a front end cover through a bolt, the front end cover is abutted against the front end of the slip group, the other end of the cylindrical shell is provided with a rear end cover through a bolt, and the rear end cover is abutted against the rear end of the slip group; the cylinder shell, the slip seat and the rear end cover are encircled to form an oil cavity, and the rear end cover is provided with an oil hole communicated with the oil cavity.

Furthermore, the slips group is surrounded by a plurality of slips and forms, the lateral wall of slips is provided with the through-hole correspondingly, wear to be equipped with spiral circlip in the through-hole.

Furthermore, a rolling groove is formed in the outer side wall of the slip, a cylindrical roller is rotationally arranged in the rolling groove, and stop blocks are arranged at two ends of the rolling groove.

Further, a sealing ring is arranged between the cylinder shell and the slip seat.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the chuck adopts the modes of hydraulic clamping and disk spring loosening, hydraulic oil enters the oil cavity through the oil hole to push the slip seat to move leftwards, the drill rod is clamped, and the force for clamping the drill rod can reach 4-8 times of the thrust of the oil cavity; when no hydraulic oil is clamped, the disc spring pushes the slip seat away, the slip seat moves rightwards, and the slip set loosens the drill rod under the action of the spiral elastic retainer ring; the utility model discloses the clamp force is big, and reliable operation compares common packing element formula chuck on the market, receives the temperature influence little, and the reliability is high, and the life-span is longer.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a schematic view of the slip assembly of the present invention.

In the figure: 1. a cylindrical housing; 2. a slip seat; 3. a slip group; 31. slips; 32. a spiral circlip; 4. a disc spring; 5. a transition end cap; 6. a front end cover; 7. a rear end cap; 8. an oil chamber; 9. an oil hole; 10. a through hole; 11. rolling a groove; 12. a cylindrical roller; 13. a stopper; 14. and (5) sealing rings.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1-2, the present invention is a specific embodiment of a hydraulic chuck of a coal mine drill carriage, comprising a cylindrical shell 1, and a slip seat 2, a slip set 3 and a disc spring 4 disposed in the cylindrical shell 1, wherein the slip seat 2 is sleeved outside the slip set 3, the outer surface of the slip seat 2 is a cylindrical surface and is attached to the inner wall of the cylindrical shell 1, the slip seat 2 is slidably disposed in the cylindrical shell 1, the inner surface of the slip seat 2 is a conical surface, the outer surface of the slip set 3 is a conical surface adapted to the slip seat 2, the inner wall of the slip seat 2 is attached to the outer wall of the slip set 3, one end of the cylindrical shell 1 is fixedly disposed with a transition end cap 5 by bolts, one end of the disc spring 4 is abutted to the transition end cap 5, the other end of the disc spring 4 is abutted to the slip seat 2, and a containing groove for containing the disc spring 4 is disposed on the front end surface of the slip seat 2, the other end of the disc spring 4 is abutted against the rear wall of the accommodating groove, and the transition end cover 5 can also limit the radial movement range of the slip set 3; the transition end cover 5 is provided with a front end cover 6 through a bolt, the front end cover 6 is abutted against the front end of the slip set 3, the other end of the cylindrical shell 1 is provided with a rear end cover 7 through a bolt, a bulge is arranged on the inner side of the rear end cover 7 and is abutted against the rear end of the slip set 3, and the rear end cover 7 can limit the radial movement range of the slip set 3; the cylinder shell 1, the slip seat 2 and the rear end cover 7 surround to form an oil cavity 8, and the rear end cover 7 is provided with an oil hole 9 communicated with the oil cavity 8. The rear end cover 7 is communicated with the cylindrical shell 1 through an oil way and communicated with an oil cavity 8 formed by the cylindrical shell 1, the slip seat 2 and the rear end cover 7.

Furthermore, two groups of oil holes are formed in the end face and the cylindrical surface of the rear end cover 7, the oil holes exposed out of the oil holes in the cylindrical surface are blocked by welding, hydraulic oil enters the oil holes in the end face of the rear end cover 7, and the hydraulic oil transmitted from the host machine is conveyed into the oil cavity through an oil way, so that power for clamping the drill rod is achieved.

Further, slips group 3 surrounds by six slips 31 and forms, curved through-hole 10 has been seted up to correspondence on slips 31's the lateral wall, and the curvature radius of six curved through-holes 10 is the same, and the combination of through-hole 10 on six slips 31 forms annular through-hole, wear to be equipped with spiral circlip 32 in the through-hole 10, spiral circlip 32 concatenates six slips 31 into the round, can spring the slips group 3 bullet that contracts simultaneously.

Further, a rolling groove 11 has been seted up on the lateral wall of

slips

31, 11 internal rotations in rolling groove are provided with cylindrical roller 12, and cylindrical roller 12 reduces the frictional force between slip seat 2 and slips 31, and the upper portion opening of rolling groove 11 is less than cylindrical roller 12's diameter, the both ends of rolling groove 11 are provided with dog 13, and the dog is fixed through the riveted mode, avoids cylindrical roller 12 roll-off.

Further, a sealing ring 14 is arranged between the cylinder shell 1 and the slip seat 2, and is used for sealing and preventing hydraulic oil from leaking.

The working principle is as follows:

in the utility model, the rear end cover 7 is provided with an oil hole 9, hydraulic oil transmitted from the host machine is transported into an oil cavity 8 formed by the cylinder shell 1, the slip seat 2 and the rear end cover 7 through the oil hole 9 and an oil duct, the thrust generated by the oil pressure makes the slip seat 2 move leftwards to compress the disc spring 4, and the slip seat 2 is matched with the conical surface of the slip group 3 to make the slip group 3 contract to clamp the drill rod;

when the hydraulic oil loses pressure, the thrust generated by the disc spring 4 is larger than the force of the hydraulic oil cavity, so that the slip seat 2 moves right until the rightmost end of the slip seat 2 props against the rear end cover 7, and meanwhile, the spiral elastic retainer ring 32 in the slip group 3 expands due to pressure loss, so that the slip loose group 3 opens the drill rod.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The hydraulic chuck of the drill carriage for the coal mine is characterized by comprising a cylindrical shell (1), and a slip seat (2), a slip set (3) and a disc spring (4) which are arranged in the cylindrical shell (1), wherein the slip seat (2) is sleeved outside the slip set (3), the outer surface of the slip seat (2) is a cylindrical surface and is attached to the inner wall of the cylindrical shell (1), the inner surface of the slip seat (2) is a conical surface and is attached to the outer wall of the slip set (3), one end of the cylindrical shell (1) is provided with a transition end cover (5) through a bolt, one end of the disc spring (4) is abutted to the transition end cover (5), the other end of the disc spring (4) is abutted to the slip seat (2), the transition end cover (5) is provided with a front end cover (6) through a bolt, and the front end of the slip set (3) is abutted to the front end of the front end cover (6), the other end of the cylindrical shell (1) is provided with a rear end cover (7) through a bolt, and the rear end cover (7) is abutted against the rear end of the slip set (3); the cylinder shell (1), the slip seat (2) and the rear end cover (7) are encircled to form an oil cavity (8), and the rear end cover (7) is provided with an oil hole (9) communicated with the oil cavity (8).

2. The hydraulic chuck of the coal mine drill carriage as claimed in claim 1, wherein the slip set (3) is formed by surrounding a plurality of slips (31), a through hole (10) is correspondingly formed in the side wall of each slip (31), and a spiral elastic retaining ring (32) penetrates through the through hole (10).

3. The hydraulic chuck of the coal mine drill carriage as recited in claim 2, characterized in that the outer side wall of the slip (31) is provided with a rolling groove (11), a cylindrical roller (12) is rotatably arranged in the rolling groove (11), and two ends of the rolling groove (11) are provided with stoppers (13).

4. The hydraulic chuck of a coal mine drill carriage according to claim 1, characterized in that a sealing ring (14) is arranged between the cylinder housing (1) and the slip bowl (2).