CN203448698U

CN203448698U - Novel single draw-bar expanding mandrel device

Info

Publication number: CN203448698U
Application number: CN201320131558.4U
Authority: CN
Inventors: 刘震; 赵义顺
Original assignee: Nanjing CNC Machine Tool Co Ltd
Current assignee: Nanjing CNC Machine Tool Co Ltd
Priority date: 2013-03-21
Filing date: 2013-03-21
Publication date: 2014-02-26
Anticipated expiration: 2023-03-21

Abstract

The utility model discloses a novel single draw-bar expanding mandrel device which comprises the following components: a draw bar, a clamp body, expanding pawls, a pushing core and a mandrel. The clamp body is arranged at a front end surface of the mandrel. One end of the draw bar is arranged in an inner hole of the clamp body, and the other end is arranged on the mandrel and performs transverse movement in an inner hole of the clamp body under driving of the mandrel. The pushing core is arranged in the inner hole of the clamp body and is separated from the draw bar by a gap. The expanding pawl is arranged in a square hole of the clamp body. According to the novel single draw-bar expanding mandrel device provided by the utility model, compared with a traditional method, a pushing force of a tailstock finial is used for expanding an expanding pawl therein. Based on realization of a clamping effect which is same with that of a traditional double-function-oil-cylinder double-draw-bar clamp, the cost is reduced, and furthermore simple structure, convenient use and easy maintenance are realized.

Description

A kind of novel simplex pull rod expanding mandrel device

Technical field

The utility model relates to a kind of automobile clamper, is a kind of novel simplex pull rod expanding mandrel device specifically.

Background technology

In field of machining, for needs with deep hole centralized positioning, one class part of processing excircles, for example this class part of automobile axle, needs two or more bites, and conventional method is to adopt two-way cylinder to drive duplex pull rod device, every pull bar drives a secondary swollen pawl swelling by the conical surface again, but the purchase cost of two-way cylinder is larger, also need tailstock center righting workpiece, operation is also inconvenient.

Utility model content

Goal of the invention: for the problem and shortage of above-mentioned existing existence, the purpose of this utility model is to provide a kind of simple in structure, easy to use, the novel simplex pull rod expanding mandrel device that cost is lower.

Technical scheme: a kind of novel simplex pull rod expanding mandrel device, comprises pull bar, clamp body, swollen pawl, plunger tip and main shaft; Described clamp body is arranged on front-end of spindle face, and described pull bar one end is located in the endoporus of clamp body, and the other end is arranged on transverse movement in the endoporus of clamp body on main shaft and under the drive of main shaft; Described plunger tip be arranged in the endoporus of clamp body and and pull bar between gapped; Described swollen pawl is arranged in the set square hole of clamp body.

As preferably, described plunger tip also has keyway, and tail end has centre bore.

As preferably, described clamp body also have with plunger tip on the suitable screw hole of keyway, keyway and the screw hole on clamp body of plunger tip are suitable, can, by the fixing plunger tip of screw, make it when transverse movement, can not produce rotation, in order to avoid there is deviation.

As preferably, the quantity of described swollen pawl is two pairs.

As preferably, the endoporus of described swollen pawl is conical surface endoporus.

As preferably, described pull bar and plunger tip are provided with the conical surface suitable with swollen pawl endoporus.

As preferably, described swollen pawl is provided with cannelure, in described cannelure, turn is housed, and described turn can prevent when sectional fixture that swollen pawl from dropping and can after completing processing, make swollen pawl homing.

Beneficial effect: compared with prior art, the utlity model has following advantage: the utility model provides a kind of novel simplex pull rod expanding mandrel device, compare with conventional method, the ejection force of tailstock center is used for to the wherein swelling of a secondary swollen pawl, can realize on the basis of the clamping effect identical with traditional double action oil cylinder duplex pull rod fixture, reduced cost, and simple in structure, easy to use, be easy to safeguard.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the partial enlarged drawing of Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

See figures.1.and.2, a kind of novel simplex pull rod expanding mandrel device, comprises pull bar 1, clamp body 2, swollen pawl 3, plunger tip 5 and main shaft 9; Clamp body 2 is arranged on main shaft 9 front end faces, and pull bar 1 one end is located in the endoporus of clamp body 2, and the other end is arranged on transverse movement in the endoporus of clamp body 2 on main shaft 9 and under the drive of main shaft 9; Plunger tip 5 be arranged in the endoporus of clamp body 2 and and pull bar 1 between gapped; Described swollen pawl 3 is arranged in the set square hole of clamp body 2.

Wherein, plunger tip 5 also has keyway, and tail end has centre bore.

Wherein, clamp body 2 also have with plunger tip 5 on the suitable screw hole of keyway.

Wherein, the quantity of described swollen pawl 3 is two pairs.

Wherein, the endoporus of swollen pawl 3 is conical surface endoporus.

Wherein, described pull bar 1 and plunger tip 5 are provided with the conical surface suitable with swollen pawl 3 endoporus.

Wherein, swollen pawl 3 is provided with cannelure, and turn 4 is housed in cannelure.

Adopt such scheme, clamp body is mounted in front-end of spindle face, and on installed surface, the conical surface and spindle end match, and are fixed on main shaft end face by four screws.Pull bar one end is connected with main shaft end oil cylinder by external screw thread, and the other end matches with clamp body endoporus.Plunger tip is arranged in clamp body endoporus, and gapped between pull bar, and the set screw hole location of the keyway on plunger tip and clamp body coincides, and can, by the fixing plunger tip of screw, make it when transverse movement, can not produce rotation, in order to avoid there is deviation.Two secondary swollen pawls are arranged in eight uniform square holes of two places on clamp body, and the conical surface set on the conical surface endoporus of swollen pawl and pull bar and plunger tip is suitable.On plunger tip, be also provided with in addition end cap and felt and prevent from falling in fixture dust.

When work, first workpiece is enclosed within on clamp body, hydraulic oil cylinder driving pull bar moves to spindle end, by pull bar epicone, wearing the moving swollen pawl of left end moves radially, stretching workpiece left end endoporus, right-hand member tailstock center holds out against and drives plunger tip to move, by the plunger tip conical surface, drive the swollen pawl of right-hand member to move radially, stretching workpiece right-hand member endoporus, completes workpiece dual-gripper stretching endoporus; After machining, tailstock center exits, and hydraulic oil cylinder driving pull bar moves to tailstock end, arrives and sets after stroke, and pull bar promotes plunger tip to be continued to move to tailstock end, and meanwhile, the turn on swollen pawl drives swollen pawl homing, reaches the object of unclamping workpiece.

The foregoing is only preferred embodiments of the present utility model; protection domain of the present utility model is not limited with above-mentioned embodiment; in every case the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or is changed, and all should include in the protection domain of recording in claims.

Claims

1. a novel simplex pull rod expanding mandrel device, is characterized in that: comprise pull bar (1), clamp body (2), swollen pawl (3), plunger tip (5) and main shaft (9); Described clamp body (2) is arranged on main shaft (9) front end face, and described pull bar (1) one end is located in the endoporus of clamp body (2), and the other end is arranged on main shaft (9) above and transverse movement in the endoporus of clamp body (2) under the drive of main shaft (9); Described plunger tip (5) be arranged in the endoporus of clamp body (2) and and pull bar (1) between gapped; Described swollen pawl (3) is arranged in the set square hole of clamp body (2).

2. a kind of novel simplex pull rod expanding mandrel device according to claim 1, is characterized in that: described plunger tip (5) also has keyway, and tail end has centre bore.

3. a kind of novel simplex pull rod expanding mandrel device according to claim 1, is characterized in that: described clamp body (2) also have with plunger tip (5) on the suitable screw hole of keyway.

4. a kind of novel simplex pull rod expanding mandrel device according to claim 1, is characterized in that: the quantity of described swollen pawl (3) is two pairs.

5. according to a kind of novel simplex pull rod expanding mandrel device described in claim 1 or 4, it is characterized in that: the endoporus of described swollen pawl (3) is conical surface endoporus.

6. a kind of novel simplex pull rod expanding mandrel device according to claim 1, is characterized in that: described pull bar (1) and plunger tip (5) are provided with the conical surface suitable with swollen pawl (3) endoporus.

7. according to a kind of novel simplex pull rod expanding mandrel device described in claim 1 or 4, it is characterized in that: described swollen pawl (3) is provided with cannelure, turn (4) is housed in cannelure.