CN210498424U

CN210498424U - Hydraulic chuck

Info

Publication number: CN210498424U
Application number: CN201921272886.XU
Authority: CN
Inventors: 董晓军; 董承文
Original assignee: Jiangsu New Best Intelligent Manufacturing Co Ltd
Current assignee: Jiangsu New Best Intelligent Manufacturing Co Ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-05-12
Anticipated expiration: 2029-08-07

Abstract

The utility model relates to the chuck field, in particular to a hydraulic chuck, which comprises a central tube, a slip seat, slips, a leaf spring, a reset spring, a front end cover, a rear end cover, a chuck body and a high-pressure oil cavity; the center tube sets up the central point at the chuck and puts, on the fixed center tube of leaf spring one end, the other end sets up the wedge inslot at the slips, the slips sets up the intermediate position at the center tube, the slip seat sets up the outside at the slips, the inclined plane that the slip seat contacted with the slips is personally submitted 30 degrees to 60 degrees with the level, the outside of slip seat is provided with the chuck body, the right side of chuck body is provided with the front end housing, the front end housing passes through reset spring and connects in the slip seat, the left side of chuck body is provided with the rear end housing, be equipped with high pressure oil pocket between chuck body and the center tube, high pressure oil pocket communicates in. The utility model discloses simple structure, the practicality is strong, makes simple to operate.

Description

Hydraulic chuck

Technical Field

The utility model relates to a chuck field, especially a fluid pressure type chuck.

Background

Chucks are mechanical devices used to clamp workpieces on machine tools. The machine tool accessory clamps and positions a workpiece by utilizing the radial movement of movable clamping jaws uniformly distributed on a chuck body. The chuck generally comprises a chuck body, movable jaws and a jaw driving mechanism 3. The diameter of the chuck body is 65 mm at least and can reach 1500 mm at most, and a through hole is formed in the center of the chuck body so as to facilitate the workpiece or bar stock to pass through; the back part is provided with a cylindrical or short conical structure and is connected with the end part of a main shaft of the machine tool directly or through a flange plate. Chucks are commonly used in lathes, cylindrical grinders and internal grinders, and may also be used in conjunction with various indexing devices for milling and drilling machines. The normally open type hydraulic chuck for hydraulic clamping and spring loosening is commonly called a capsule type chuck, is large in clamping force, rapid in reaction and small in rotary inertia, is widely applied to a coal mine underground drill, but has strict requirements on the size of each internal part, and the phenomenon that a rubber cylinder is gnawed easily due to unsatisfactory size clearance fit is caused.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a hydraulic chuck.

A hydraulic chuck comprises a central pipe, a slip seat, slips, a leaf spring, a return spring, a front end cover, a rear end cover, a chuck body and a high-pressure oil cavity; the central tube sets up the central point of chuck puts, flat spring one end is fixed on the central tube, and the other end sets up carve the inslot of slips, the slips sets up the intermediate position of central tube, the slip seat sets up the outside of slips, the slip seat with the inclined plane that the slips contacted personally submits 30 degrees to 60 degrees with the level, the outside of slip seat is provided with the chuck body, the right side of chuck body is provided with the front end housing, the front end housing passes through reset spring connect in the slip seat, the left side of chuck body is provided with the rear end housing, the chuck body with be equipped with high-pressure oil chamber between the central tube, high-pressure oil chamber communicate in the central tube.

Furthermore, the front end cover is fixed on the chuck body through screws, and the rear end cover is fixed on the chuck body through bolts.

Furthermore, the reset spring is a nitrogen spring, a cylinder body part of the nitrogen spring is fixed on the front end cover, and a piston rod of the nitrogen spring is connected to the slip seat.

Further, the number of the nitrogen springs is 2.

Further, an oil inlet/outlet is arranged on the chuck body and communicated with the central pipe.

The utility model provides a hydraulic chuck, the utility model adopts a nitrogen spring to replace the traditional spiral spring, compared with the traditional spiral spring, the nitrogen spring has the characteristics of small volume, large elasticity, long service life, difficult rustiness, constant elastic pressure and the like; the utility model discloses hydraulic oil in the high pressure oil pocket is promoting the slip seat along the inclined plane rebound between slip seat and the slips, thereby becomes the radial displacement of slips with the axial displacement of slip seat and presss from both sides tight work piece that changes.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure, 1, a central tube; 2. a slip seat; 3. slips; 4. a leaf spring; 5. a return spring; 6. a front end cover; 7. a rear end cap; 8. a chuck body; 9. a high pressure oil chamber; 10. a screw; 11. a bolt; 12. an oil inlet/outlet.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Meanwhile, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following describes preferred embodiments of the present invention in detail with reference to the accompanying drawings.

As shown in fig. 1, a hydraulic chuck comprises a central pipe 1, a slip seat 2, slips 3, a leaf spring 4, a return spring 5, a front end cover 6, a rear end cover 7, a chuck body 8 and a high-pressure oil chamber 9; the central tube 1 is arranged at the central position of the chuck 8, one end of the leaf spring 4 is fixed on the central tube 1, the other end of the leaf spring is arranged in the wedge-shaped groove of the slip 3, the leaf spring 4 is a simple spring which utilizes the deformation of the elastic metal sheet to generate the spring characteristic, and the leaf spring 4 is used for completing the radial reset of the slip 3 along the central tube 1. The slips 3 are arranged in the middle of the central pipe 1, and the central pipe 1 mainly plays a role in transmitting torque and push-pull force to the slips 3 and providing guidance for the slip seat 2 and fixing the spring 4. The slip seat 2 is arranged on the outer side of the slip 3, the inclined plane of the slip seat 2 contacted with the slip 3 and the horizontal plane form 30-60 degrees, the outer side of the slip seat 2 is provided with the chuck body 8, the right side of the chuck body 8 is provided with the front end cover 6, the front end cover 6 is fixed on the chuck body 8 through a screw 10, the front end cover 6 is connected with the slip seat 2 through the reset spring 5, the reset spring 5 is a nitrogen spring, the nitrogen spring assembly product is a novel elastic functional component and is an upgrading and updating product of a conventional spiral spring, the nitrogen spring is a component with an elastic function, high-pressure nitrogen is sealed in a determined container, external force compresses the nitrogen through a piston rod, certain elastic pressure is obtained by expansion of the high-pressure nitrogen when the external force is removed, and the number of the nitrogen springs is 2, the cylinder body part of the nitrogen spring is fixed on the front end cover 6, and the piston rod of the nitrogen spring is connected to the slip seat 2. The left side of the chuck body 8 is provided with the rear end cover 7, the rear end cover 7 is fixed on the chuck body 8 through a bolt 11, a high-pressure oil cavity 9 is arranged between the chuck body 8 and the central pipe 1, and the high-pressure oil cavity 9 is communicated with the central pipe 1. An oil inlet/outlet port 12 is arranged on the chuck body 8, and the oil inlet/outlet port 12 is communicated with the central pipe 1.

The working principle is as follows: an external hydraulic oil pump is connected to the oil inlet/outlet pipe 12, hydraulic oil enters the central pipe 1 from the oil inlet/outlet pipe 12, the central pipe 1 is communicated with the high-pressure oil cavity 9, the hydraulic oil enters the high-pressure oil cavity 9 from the central pipe 1, the high-pressure hydraulic oil generated in the high-pressure oil cavity 9 pushes the slip seat 2 to move upwards along the inclined plane between the slip seat 2 and the slip 3, and the axial displacement of the slip seat 2 is changed into the radial displacement of the slip 3 so as to clamp a rotating workpiece. The slip seat 2 moves along the inclined plane so as to compress the nitrogen spring, when the workpiece does not need to be clamped, the supply of hydraulic oil is stopped, the piston rod pushes the slip seat 3 to move back under the action of the elastic force of the nitrogen spring, and the hydraulic oil in the high-pressure oil cavity returns to the hydraulic oil pump from the central pipe.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic chuck is characterized by comprising a central pipe, a slip seat, slips, a leaf spring, a return spring, a front end cover, a rear end cover, a chuck body and a high-pressure oil cavity; the central tube sets up the central point of chuck puts, flat spring one end is fixed on the central tube, and the other end sets up carve the inslot of slips, the slips sets up the intermediate position of central tube, the slip seat sets up the outside of slips, the slip seat with the inclined plane that the slips contacted personally submits 30 degrees to 60 degrees with the level, the outside of slip seat is provided with the chuck body, the right side of chuck body is provided with the front end housing, the front end housing passes through reset spring connect in the slip seat, the left side of chuck body is provided with the rear end housing, the chuck body with be equipped with high-pressure oil chamber between the central tube, high-pressure oil chamber communicate in the central tube.

2. The hydraulic chuck according to claim 1, wherein the front end cap is fixed to the chuck body by screws, and the rear end cap is fixed to the chuck body by bolts.

3. The hydraulic chuck according to claim 1, wherein the return spring is a nitrogen spring, a cylinder member of the nitrogen spring is fixed to the front end cap, and a piston rod of the nitrogen spring is connected to the slip bowl.

4. A hydraulic chuck according to claim 3, wherein said nitrogen springs are 2 in number.

5. The hydraulic chuck according to claim 1, wherein said chuck body is provided with an oil inlet/outlet port, and said oil inlet/outlet port is communicated with said central tube.