CN215699981U

CN215699981U - Front-mounted workpiece chuck

Info

Publication number: CN215699981U
Application number: CN202023340403.0U
Authority: CN
Inventors: 钟弟昌; 朱毅
Original assignee: Huizhou Yiya Machinery Co ltd
Current assignee: Huizhou Yiya Machinery Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-02-01
Anticipated expiration: 2030-12-30

Abstract

A front-mounted workpiece chuck relates to the technical field of workpiece chucks and comprises a spindle, a chuck seat, a chuck handle, a piston, an air pipe, a chuck, a rotary joint, a spring, a pull rod and a combining cap, wherein the chuck handle is fixed and rotates together with the spindle through a taper hole in a high-precision matching manner, the chuck seat is fixed on the chuck handle, an inner hole and an inner cavity are formed in the chuck handle, the piston is arranged on the inner cavity in a sliding manner, the head of the air pipe is connected with the piston through threads, the chuck is arranged on the chuck seat, the rotary joint is connected with the tail of the air pipe, the spring is sleeved on the head of the air pipe, the end of the chuck handle is provided with threads and connected with the pull rod, the left end of the pull rod is provided with threads, the combining cap is matched with the chuck handle through the threads, the piston is integrated in a chuck mechanism, so that a compact structure, a large driving force and great convenience are realized, the air source or hydraulic supply is realized through a small rotary structure at the tail, thereby avoiding the eccentricity problem brought by the conventional large rotary joint.

Description

Front-mounted workpiece chuck

Technical Field

The utility model relates to the technical field of workpiece chucks, in particular to a front-mounted workpiece chuck.

Background

The existing chuck adopts a latter type rotary cylinder or oil cylinder and a preposed rotary cylinder, the former has to be made with a larger diameter under the condition of hollow use, and the spindle generates vibration and jumping due to installation or manufacturing eccentricity when rotating at high speed. The latter front-mounted rotary cylinder, which also requires a relatively large volume, interferes with the protective casing of the tool or grinding wheel and collides under certain use conditions, and this problem is particularly acute when the grinding machine is used.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a front-mounted workpiece chuck, which aims to solve the technical problems in the background technology.

The embodiment of the utility model adopts the following technical scheme: a front-mounted workpiece chuck comprises a main shaft, a chuck seat, a chuck handle, a piston, an air pipe, a collet, a rotary joint, a spring, a pull rod and a nut, the main shaft is a working head main shaft of the machine tool, the chuck handle is matched and fixed with the main shaft through a taper hole in a high-precision manner and rotates together, the chuck seat is fixed on the chuck handle, an inner hole and an inner cavity are arranged on the chuck handle, the inner hole is used for an air pipe to pass through, the piston is arranged on the inner cavity in a sliding manner, the head of the air pipe is connected with the piston through threads, the collet is arranged on the collet seat, the front of the collet is provided with taper and an elastic groove, the rotary joint is connected with the tail part of the air pipe in a sealing way, the spring is sleeved on the head of the air pipe, the end part of the chuck handle is provided with threads to be connected with the pull rod, the left end of the pull rod is provided with threads, and the chuck handle is tightened through thread matching by the nut.

Furthermore, a through hole is formed in the front end of the piston, and a gap is formed between the piston and the end face of the chuck base when the piston is in the right position.

Further, the two parts of the rotary joint can rotate relatively.

The embodiment of the utility model adopts at least one technical scheme which can achieve the following beneficial effects:

through integrating the piston in chuck mechanism to realize compact structure, big drive power, very big convenience and work piece main shaft interface cooperation realize air supply or hydraulic supply through a little revolution mechanic of afterbody, thereby avoid the eccentric problem that conventional big rotary joint brought.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a perspective sectional view of the present invention.

Reference numerals: the device comprises a main shaft 1, a chuck seat 2, a chuck handle 3, a piston 4, an air pipe 5, a collet 6, a rotary joint 7, a spring 8, a pull rod 9, a nut 10, a through hole 11 and a gap 12.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present invention provides a front-mounted workpiece chuck, where a spindle 1 is a spindle of a working head of a machine tool, and is driven to rotate by a motor or other means. The chuck is divided into a chuck seat 2 and a chuck handle 3, and the chuck handle 3 is matched, fixed and rotated together with the main shaft 1 through a taper hole, a straight hole or an end face with high precision. The chuck seat 2 is fixed on the chuck handle 3, and the chuck handle 3 is provided with an inner hole and an inner cavity. The cavity acts as a cylinder sleeve and the inner bore is used for the passage of the air pipe 5. The piston 4 is slidable within the inner chamber. The front of the collet 6 is provided with a taper and an elastic groove which can be matched with the taper of the collet base 2, the collet 6 contracts and deforms when being pulled backwards so as to clamp a workpiece, and the collet 6 restores to deform when being pushed forwards so as to loosen the workpiece. The collet 6 and the piston 4 are connected by threads or other means, and the clamping and the unclamping of the collet 6 are driven by the back and forth movement of the piston 4. The air tube 5 and the piston 4 are connected through threads or other methods, and the connection position is sealed, so that fluid cannot leak. When the piston 4 is in the right position, a gap 12 is formed between the piston 4 and the end surface of the chuck base 2, and a through hole 11 is formed at the front end of the piston 4, so that the gap 12 is communicated with the inner hole of the air pipe 5. The two parts of the rotary joint 7 can rotate relatively, so that the external pipeline can not rotate along with the main shaft 1. The rotary joint 7 is connected with the air pipe 5 in a sealing way. After the single fluid enters from the rotary joint 7, the single fluid enters the gap 12 through the inner hole of the air pipe 5 and the opening of the piston 4, so that the piston 4 is pushed to move leftwards, the collet chuck 6 is tightened, when the fluid pressure disappears, the gap 12 is decompressed, the spring 8 pushes the piston 4 to move rightwards, so that the collet chuck 6 is loosened, the end part of the chuck handle 3 is provided with threads and is connected with the pull rod 9, the left end of the pull rod 9 is provided with threads, and the cap 10 is matched with the tension chuck handle 3 through the threads, so that the chuck handle 3 is tightly matched with the spindle 1 without loosening. Wherein the trachea 5 may be ventilated with air or other fluid.

The piston 4 is integrated in the chuck mechanism, so that a compact structure is realized, large driving force is realized, the piston is greatly convenient to be matched with a workpiece spindle interface, and a small rotating structure at the tail part is used for realizing air source or hydraulic supply, so that the eccentric problem caused by a conventional large rotating joint 7 is avoided.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A front-mounted workpiece chuck is characterized by comprising a spindle (1), a chuck base (2), a chuck handle (3), a piston (4), an air pipe (5), a collet (6), a rotary joint (7), a spring (8), a pull rod (9) and a combining cap (10), wherein the spindle (1) is a working head spindle (1) of a machine tool, the chuck handle (3) is fixed with the spindle (1) in a high-precision matching manner through a taper hole and rotates together, the chuck base (2) is fixed on the chuck handle (3), an inner hole and an inner cavity are formed in the chuck handle (3), the inner hole is used for the air pipe (5) to pass through, the piston (4) is arranged on the inner cavity in a sliding manner, the head of the air pipe (5) is connected with the piston (4) through threads, the collet (6) is arranged on the chuck base (2), a taper is formed in front of the collet (6), and an elastic groove is formed in the front of the collet (6), the rotary joint (7) is connected with the tail of the air pipe (5) in a sealing mode, the spring (8) is sleeved on the head of the air pipe (5), the end portion of the chuck handle (3) is provided with threads and connected with the pull rod (9), the left end of the pull rod (9) is provided with threads, and the chuck handle (3) is tightened through thread matching by the cap (10).

2. A front-loading workpiece chuck according to claim 1, characterized in that the front end of the piston (4) is provided with a through hole (11), and a gap (12) is formed between the piston (4) and the end surface of the chuck base (2) at the right position.

3. A front-loading workpiece chuck according to claim 2, characterized in that the rotary joint (7) is rotatable relative to the other two parts.