CN105345502A - Circular workpiece clamp - Google Patents

Abstract

The invention discloses a circular workpiece clamp, which comprises: the rotary sleeve component can rotate relative to the base component, the support component comprises a support and an inner ring sleeve, an inner hole is formed in the center of the support, and at least three inclined sliding grooves are formed in the peripheral surface of the support; the at least three inclined sliding blocks are respectively arranged in the at least three inclined sliding grooves; the inner side surface and the outer side surface of each clamping block are respectively provided with an inner clamping surface and an outer clamping surface; the screw rod mechanism comprises a bolt and a nut matched with the bolt, one end of the bolt is connected with the rotary sleeve assembly, the nut is arranged in the axial hole, and the nut is connected with the inclined sliding block. The circular workpiece clamp provided by the invention has the advantages of simple and compact structure, capability of changing the clamping diameter within a certain range, capability of adopting an expansion clamp or a contraction clamp in a clamping mode, strong universality, and firmness and convenience in clamping.

Description

Round workholding

technical field

The invention relates to a work fixture, in particular to a circular workpiece fixture.

Background technique

In the fixture process, the performance of the fixture is directly related to the machining accuracy of the product. For circular workpieces, the clamping needs to be compact and reasonable, easy to disassemble and assemble, and the diameters of circular workpieces are diverse.

Contents of the invention

In view of the above-mentioned current state of the art, the technical problem to be solved by the present invention is to provide a circular workpiece fixture with compact structure, convenient clamping and clamping within a certain diameter range.

In order to solve the above technical problems, a circular workpiece fixture provided by the present invention includes:

base assembly;

A rotating sleeve assembly, the first end of which is connected to the base assembly and can rotate relative to the base assembly, and the second end of the rotating sleeve assembly is provided with a first limiting protrusion protruding inward rise;

Bracket assembly, the bracket assembly includes a bracket and an inner ring sleeve, the inner ring sleeve is fixed on the first end of the bracket, and a gap that cooperates with the first stop protrusion is formed between the inner ring sleeve and the bracket. The first limiting groove, the first limiting protrusion snaps into the first limiting groove, the center of the bracket has an inner hole extending axially, and the outer peripheral surface of the bracket is provided with At least three inclined chute spaced along the circumferential direction;

At least three slanted sliders, at least three slanted sliders are respectively arranged in at least three said slanted chute and can slide in said slanted chute;

At least three clamping blocks, the at least three clamping blocks are respectively connected to at least three ends of the inclined sliders close to the second end of the bracket, and the inner and outer surfaces of the clamping blocks are respectively provided with inner a clamping surface and an external clamping surface, the inclined slider slides back and forth along the inclined chute to change the size of the circle formed by all the internal clamping surfaces and the circle formed by all the external clamping surfaces; and

A screw mechanism, the screw mechanism includes a bolt and a nut matched with the bolt, the bolt is installed in the rotating sleeve assembly and the bracket assembly, one end of the bolt is connected with the rotating sleeve assembly, and the The rotating sleeve assembly is driven to rotate, the nut is installed in the axial hole, and the nut is connected with the inclined slider.

In one of the embodiments, the first end of the support is circular, the second end of the support is a regular polygon, and one end of at least three of the inclined chute respectively extends to each side of the regular polygon .

In one of the embodiments, the bottom of the inclined chute is provided with a through groove, and one end of the through groove extends to the end surface of the first end of the bracket, and the nut passes through the shaft pin passing through the through groove and The inclined slider is connected.

In one embodiment, the inclined slider includes a "T"-shaped sliding part, and the cross-section of the inclined sliding groove is a "T" shape matched with the "T"-shaped sliding part.

In one of the embodiments, the inner surface of the clamping block is also provided with a blocking surface perpendicular to the axial direction of the bracket, the blocking surface and the inner clamping surface are close to one end of the inclined slider connected, a step is formed between the two.

In one embodiment, the inner ring sleeve includes a ring body and at least three stoppers arranged on the ring body at intervals along the circumferential direction, the stoppers have protrusions protruding outward from the ring body, at least The protrusions of the three stoppers, the ring body and the bracket form the first limiting groove.

In one of the embodiments, the stopper has a limiting part located inside the ring body, and the inner surfaces of the limiting parts of at least three of the stoppers cooperate with the outer peripheral surface of the nut part of the bolt.

In one of the embodiments, the nut portion of the bolt is provided with a through hole penetrating in the radial direction, and the two ends of the shaft pin passing through the through hole are fixed on the rotating sleeve assembly.

In one of the embodiments, the rotating sleeve assembly includes a rotating sleeve and an outer ring sleeve, one end of the rotating sleeve is provided with a first limiting protrusion, the other end is connected with the outer ring sleeve, and the outer ring sleeve has an outward ring sleeve A second limiting protrusion protruding inward, a second limiting groove cooperating with the second limiting protrusion is provided on the base component, and the second limiting protrusion snaps into the second limiting groove.

In one of the embodiments, the base assembly includes a base and a disk, the disk is fixed on the base, the end of the disk away from the base has a flange protruding outward, and the flange is connected to the outer peripheral surface of the disk. The second limiting groove is formed between the base and the base.

Compared with the prior art, the circular workpiece fixture provided by the present invention can change the clamping diameter within a certain range, and the clamping method can adopt expansion clamping or contraction clamping, and is versatile; moreover, the structure is simple and compact, and the clamping Strong and convenient.

The beneficial effects of the additional technical features of the present invention will be described in the specific embodiments of this specification.

Description of drawings

Fig. 1 is the exploded view of the circular workpiece holder in the embodiment of the present invention;

Fig. 2 is the assembly diagram of the circular workpiece fixture in the embodiment of the present invention;

Fig. 3 is a cross-sectional view of a circular workpiece holder in an embodiment of the present invention.

Explanation of reference signs: 1. base; 1a, fixing hole; 2. disc; 2a, flange; 3. outer ring sleeve; 4. rotating sleeve; 4a, first limit protrusion; 5. inner ring sleeve; 51, ring body; 52, block; 52a, protruding part; 52b, limit part; 6, bolt; 61, nut part; 62, through hole; 7, nut; 8, bracket; 8a, inner hole; 8b , inclined chute; 8c, through groove; 9, inclined slider; 9a, sliding part; 10, clamping block; 10a, inner clamping surface; 10b, outer clamping surface; 10c, blocking surface; 11, first Limiting groove; 12, the second limiting groove.

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

Referring to Fig. 1-3, the circular workpiece fixture in one of the embodiments of the present invention includes a base assembly, a rotating sleeve assembly, a bracket assembly, an inclined slider 9, a clamping block 10 and a screw mechanism, wherein the base assembly mainly supports Function, the base assembly includes a base 1 and a disc 2, the base 1 is provided with a number of fixing holes 1a, through which the entire fixture is fixed on the operating table. The disk 2 is fixed on the base 1 by screws, and the end of the disk 2 away from the base 1 has a flange 2a protruding outward, between the flange 2a and the outer peripheral surface of the disk 2 and the top surface of the base 1 A second limiting groove 12 is formed.

The rotating sleeve assembly includes a rotating sleeve 4 and an outer ring sleeve 3. One end of the rotating sleeve 4 is provided with a first limiting protrusion 4a protruding inward, and the other end is connected with the outer ring sleeve 3, and the outer ring sleeve 3 has a The second limiting protrusion 3a protruding from the outer ring sleeve 3, the second limiting protrusion 3a cooperates with the second limiting groove 12 on the base assembly, and the second limiting protrusion 3a snaps into the second limiting slot 12, so that the rotating sleeve assembly and the base assembly are connected together, and the rotating sleeve assembly can rotate relative to the base assembly.

The bracket assembly includes a bracket 8 and an inner ring sleeve 5, the inner ring sleeve 5 is fixed on the first end of the bracket 8, and forms a first stop fitting with the first stop protrusion 4a between the bracket 8 and the bracket 8. A limiting groove 11, the first limiting protrusion 4a snaps into the first limiting groove 11, so as to connect the bracket assembly with the rotating sleeve assembly, and the rotating sleeve assembly can rotate relative to the bracket assembly. The center of the bracket 8 has an inner hole 8a extending in the axial direction, and the outer peripheral surface of the bracket 8 is provided with four inclined chute 8b at intervals along the circumferential direction, and the oblique chute 8b has an included angle α with the axial direction of the bracket 8 , 30°≤α≤60°, preferably, the cross-section of the inclined chute 8b is T”-shaped. In order to limit the sliding range of the inclined slider in the inclined chute, the inclined chute 8b The bottom of the groove is provided with a through groove 8c, and one end of the through groove 8c extends to the end face of the first end of the support 8. Preferably, the first end of the support 8 is circular, and the second end of the support 8 is a regular quadrilateral, and the four One end of described inclined chute 8b extends to each limit of regular quadrilateral respectively.The second end of support 8 is regular quadrilateral, and with respect to circle, under the same clamping diameter scope, consumption material is few, and square It is convenient for clamping the inclined chute and processing, and the circle at the first end cooperates with the circular ring frame below, making the overall appearance beautiful.

The oblique slider 9 includes a "T" shaped sliding part 9a, and the sliding parts 9a of the four oblique sliders 9 are respectively arranged in the four oblique chute grooves 8b and can slide in the oblique chute grooves 8b. The four clamping blocks 10 are respectively connected to one end of the four inclined sliders 9 close to the second end of the bracket 8, and the inner and outer surfaces of the clamping blocks 10 are respectively provided with an inner clamping surface 10a and an outer clamping surface. The holding surface 10b, the inclined slider 9 slides back and forth along the inclined sliding groove 8b to change the size of the circle formed by all the inner holding surfaces 10a and the circle formed by all the outer holding surfaces 10b. In this way, the circular workpiece fixture can adopt two modes of expansion clamping and contraction clamping, and the clamping diameter can be changed within a certain range. Preferably, the inner surface of the clamping block 10 is also provided with a radially extending blocking surface 10c, the blocking surface 10c is connected to the end of the inner clamping surface 10a close to the inclined slider 9, and a step is formed between the two, It can play a limiting role on the clamped object.

The screw mechanism includes a bolt 6 and a nut 7 cooperating with the bolt 6, the bolt 6 is installed in the rotating sleeve assembly and the bracket assembly, and the nut part 61 of the bolt 6 is provided with a Direction through hole 62, shaft pin (not shown) passes through hole 62, and the two ends of shaft pin are fixed on the inner wall of swivel sleeve 4, drive bolt 6 to rotate by swivel sleeve 4 like this. The nut 7 is installed in the axial hole 8a of the bracket 8, and the nut 7 is connected with the inclined slider 9 through a pivot pin passing through the through slot 8c.

The working principle of the circular workpiece fixture in this embodiment is as follows:

Turn the rotary sleeve 4 by hand to drive the bolt 6 to rotate, and the nut 7 moves along the axial direction of the thread. Since the nut 7 is connected with the inclined slider 9, and the movement of the inclined slider 9 is restricted by the inclined chute 8b, the movement of the nut 7 drives The oblique slider 9 slides along the axial direction of the oblique slide groove 8b, so that the diameter of the circle surrounded by the clamping block 10 at the top of the oblique slider 9 changes to a suitable value accordingly. Install the round workpiece to be clamped on the clamping block 10, and turn the rotary sleeve 4 by hand. When the clamping method is adopted, the diameter between the clamping blocks 10 is reduced to lock the workpiece. The diameter enclosed between the clamping blocks 10 is used to lock the workpiece.

The clamping diameter of the circular workpiece fixture according to the embodiment of the present invention can be changed within a certain range, and the clamping method can be expanded or contracted. It is universal and strong, and the clamping is firm and convenient; moreover, all parts are compactly connected together , there is not too much space in the middle, and among the fixtures with the same external dimensions, the working stroke of the fixture is relatively large, so the structure is simple and compact.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims (10)

1. a round piece fixture, is characterized in that, comprising:

Base assembly;

Rotary sleeve assembly, the first end of described rotary sleeve assembly is connected with described base assembly, and can rotate relative to described base assembly, and the second end of described rotary sleeve assembly is provided with inwardly outstanding the first spacing preiection (4a);

Bracket component, described bracket component comprises support (8) and inner ring sleeve (5), described inner ring sleeve (5) is fixed on the first end of described support (8), the first limited impression (11) coordinated with described first spacing preiection (4a) is formed between described inner ring sleeve (5) with support (8), described first spacing preiection (4a) snaps in described first limited impression (11), the center of described support (8) has the endoporus (8a) extended vertically, the outer peripheral face of described support (8) is provided with the oblique chute (8b) at least three along the circumferential direction intervals,

At least three angled-lift splitses (9), at least three angled-lift splitses (9) are arranged at least three described oblique chutes (8b) respectively also can be slided at oblique chute (8b);

At least three grip blocks (10), at least three described grip blocks (10) respectively angled-lift splits (9) described with at least three are connected near one end of described support (8) second end, the medial surface of described grip block (10) and lateral surface are respectively arranged with interior clamping face (10a) and outer clamping face (10b), and described angled-lift splits (9) slidably reciprocates to change the size of circle that all interior clamping faces (10a) are formed and the circle that all outer clamping faces (10b) are formed along described oblique chute (8b); And

Screw body, the nut (7) that described screw body comprises bolt (6) and coordinates with bolt (6), described bolt (6) is loaded in described rotary sleeve assembly and described bracket component, described bolt (6) one end is connected with described rotary sleeve assembly, by described rotary sleeve assembly driven rotary, described nut (7) is contained in described axial hole (8a), and described nut (7) is connected with described angled-lift splits (9).

2. round piece fixture according to claim 1, it is characterized in that, the first end of described support (8) is circular, second end of described support (8) is regular polygon, and one end of at least three described oblique chutes (8b) extends on each limit of described regular polygon respectively.

3. round piece fixture according to claim 1, it is characterized in that, the bottom land of described oblique chute (8b) is provided with groove (8c), and one end of groove (8c) extends to the end face of described support (8) first end, described nut (7) is connected with described angled-lift splits (9) by the pivot pin through described groove (8c).

4. round piece fixture according to claim 1, it is characterized in that, described angled-lift splits (9) comprises "T"-shaped sliding part (9a), and the cross section of described oblique chute (8b) is "T"-shaped for what coordinate with described "T"-shaped sliding part (9a).

5. round piece fixture according to claim 1, it is characterized in that, the medial surface of described grip block (10) is also provided with the blocking surface (10c) vertical with the axial direction of described support (8), described blocking surface (10c) is connected with described interior clamping face (10a) one end near described angled-lift splits (9), forms step between the two.

6. round piece fixture according to claim 1, it is characterized in that, described inner ring sleeve (5) comprises ring body (51) and is arranged on along the circumferential direction be intervally arranged at least three blocks (52) on ring body (51), described block (52) has to ring body (51) protuberance (52a) protruding outside, and described protuberance (52a) and described ring body (51), the described support (8) of at least three described blocks (52) form described first limited impression (11).

7. round piece fixture according to claim 1, it is characterized in that, described block (52) has the limiting section (52b) being positioned at described ring body (51) inner side, and the medial surface of the limiting section (52b) of at least three described blocks (52) coordinates with the outer peripheral face in the nut portion (61) of described bolt (6).

8. round piece fixture according to claim 1, it is characterized in that, the nut portion (61) of described bolt (6) is provided with the through hole (62) radially run through, the two ends through the pivot pin of described through hole (62) are fixed on described rotary sleeve assembly.

9. round piece fixture as claimed in any of claims 1 to 8, it is characterized in that, described rotary sleeve assembly comprises rotary sleeve (4) and exterior ring cap (3), one end of rotary sleeve (4) is provided with the first spacing preiection (4a), the other end is connected with exterior ring cap (3), and exterior ring cap (3) has the second spacing preiection (3a) outstanding in exterior ring cap (3), described base assembly is provided with the second stopper slot (12) coordinated with the second spacing preiection (3a), second spacing preiection (3a) snaps in the second stopper slot (12).

10. round piece fixture according to claim 9, it is characterized in that, described base assembly comprises base (1) and disk (2), described disk (2) is fixed on base (1), described disk (2) has flange (2a) outstanding laterally away from one end of base (1), forms described second stopper slot (12) between the outer peripheral face of flange (2a) and disk (2) and described base (1).