CN209256764U - Clamping device for shaft member - Google Patents

Abstract

The utility model provides a kind of clamping device for shaft member, it includes collet, collet has the clamping valve of the outfit arc-shaped cross-section of multiple mutual elastic connections, each clamping valve has the first end towards clamped shaft member and the second end away from clamped shaft member in the axial direction, wherein, there is each clamping valve of collet the length that radially extends of the first clamping part extended radially inward and the second clamping part and the first clamping part to radially extend length less than the second clamping part.The clamping device can clamp the shaft member of different-diameter.

Description

Clamping device for shaft member

Technical field

The utility model relates to clamping device fields.Specifically, the utility model relates to the clamping devices for shaft member.

Background technique

It is the production line that a kind of single station can satisfy bearing assembly that camshaft, which assembles big line, and assembly method is main shaft Fixture first clamps pipe one end, after other end has assembled extremity piece, is overturn by turnover mechanism, and the clamping of main shaft fixture has been assembled Extremity piece (while there may be angle positioning requirements), then assembles other parts.In the processing and assembling process of shaft member, due to It assembles big line to need to overturn shaft member, therefore same main shaft fixture needs to clamp two kinds of various sizes of workpiece.In addition, end Part has keyway, and the keyway is wider relative to fixture, since keyway is the angle reference of entire shaft member, is assembling Ensure that its angle stabilization is most important in journey.

Accordingly, it is desirable to provide it is a kind of can pipe end to shaft member and extremity piece realize the folder of stable holding and precise positioning simultaneously Hold device.

Utility model content

The above problem is resolved by the clamping device of embodiment according to the present utility model.The clamping device includes folder Head, collet have the clamping valve of the outfit arc-shaped cross-section of multiple mutual elastic connections, and each clamping valve has face in the axial direction First end to clamped shaft member and the second end away from clamped shaft member, wherein each clamping valve of collet have to The first clamping part and the second clamping part inside radially extended, the first clamping part than the second clamping part closer to clamping valve first End, and the length that radially extends of the first clamping part radially extends length less than the second clamping part.This clamping device can be with The both ends of shaft member different-diameter are clamped by two clamping parts.

A preferred embodiment according to the present utility model, clamping device further include cushion block, cushion block have base end and from The base end multiple complementary clamping parts axially extending to same direction, when cushion block is from second end insertion collet, each complementation Clamping part is inserted into respectively in circumferentially-spaced between two the second clamping parts, to form the clamp structure of annular.Cushion block can be with Axial stop and positioning are provided for shaft member.

Another preferred embodiment according to the present utility model, in the axial end face of one of complementary clamping part of cushion block On, it is formed with axially extending locating plate, when gripping apparatus grips are fixed on the extremity piece of shaft member one end, locating plate is located in end In the keyway of part.Locating plate can carry out angle positioning to wider keyway.

Another preferred embodiment according to the present utility model, the first clamping part and/or the second clamping part and/or complementary clamping The circumferential medial surface in portion is arc surface.Arc surface is engaged with clamped shaft member, convenient for being bonded and clamping shaft member surface.

Another preferred embodiment according to the present utility model, when in cushion block insertion collet, end of the base end towards collet Face abuts end face of second clamping part towards base end, so that the assembling of collet and cushion block is more stable.

Another preferred embodiment according to the present utility model, when gripping apparatus grips are fixed on the extremity piece of shaft member one end, The axial end face of complementary clamping part is higher than the second clamping part backwards to the end face of base end, so that the end face of clamped extremity piece abuts On the complementary clamping part of cushion block, stable axially position and backstop can be provided for clamped shaft member.

Another preferred embodiment according to the present utility model, it is each clamping valve arc corresponding to central angle it is equal.It is more A clamping valve is uniformly distributed, to the more uniform stabilization of the chucking power of shaft member.

Another preferred embodiment according to the present utility model, the circumferential width of the first clamping part and the circumferential width of clamping valve It is identical, so that clamping face is bigger, clamp more stable.

Another preferred embodiment according to the present utility model, the second retaining part is in the circumferential center of clamping valve, so that the Interval between two clamping parts is uniformly distributed, more stable to the chucking power of shaft member.

Another preferred embodiment according to the present utility model, collet can have three clamping valves.Correspondingly, cushion block has Three complementary clamping parts.

Detailed description of the invention

Introduce the utility model in detail referring to the drawings:

The perspective view, rearview and cross-sectional view of the collet of embodiment according to the present utility model is shown respectively in Fig. 1 a-1c；

Main view, cross-sectional view, rearview and the side of the cushion block of embodiment according to the present utility model is shown respectively in Fig. 2 a-2d View；

Fig. 3 shows the perspective view of extremity piece clamped by the clamping device of embodiment according to the present utility model；

Cuing open when the gripping apparatus grips shaft member pipe end of embodiment according to the present utility model is shown respectively in Fig. 4 a and Fig. 4 b View and main view；With

Cuing open when the gripping apparatus grips shaft member extremity piece of embodiment according to the present utility model is shown respectively in Fig. 5 a and Fig. 5 b View and main view.

Specific embodiment

Specific embodiment according to the present utility model is described below with reference to attached drawing.Following detailed description and drawings are used In illustratively illustrating the principles of the present invention, the utility model is not limited to described preferred embodiment, the utility model Protection scope be defined by the claims.

Embodiment according to the present utility model, clamping device include 2 two components of collet 1 and cushion block.Such as Fig. 1 a-1c institute Show, collet 1 is made of three clamping valves 3, and the radial cross-section of each clamping valve 3 is generally curved, and three clamping valves 3 pass through bullet Property material be connected with each other (not shown), to form one rough annular (Fig. 1 b).The first end 6 of valve 3 is clamped towards being pressed from both sides The shaft member 10 held, the second end 7 opposite with first end 6 is backwards to clamped shaft member 10.The inside for clamping valve 3 has radially It substantially fans the cross section of the first clamping part 4 and the second clamping part 5 extended to form, the first clamping part 4 and the second clamping part 5 The circumferential medial surface of shape, each clamping part is formed as arc surface, will pass through shape cooperation clamping shaft member 10.First clamping part 4 Than the second clamping part 5 closer to first end 6, that is, closer to clamped 10 side of shaft member.Preferably, the first clamping part 4 It can be concordant with the end face of first end 6.The length that first clamping part 4 extends radially inward is less than the second clamping part 5, so that three Circumference at circumferential medial surface of the circumference at the circumferential medial surface of first clamping part 4 than three the second clamping parts 5 Diameter is bigger.It is formed between second clamping part 5 of two clamping valves 3 circumferentially-spaced, it is preferable that the circumferentially spaced width and every The circumferential width of a second clamping part (5) is identical.And the circumferential width of the first clamping part can be with the circumferential width phase of clamping valve Together.

As shown in Figure 2 a-2d, cushion block 2 has circular base end 8, and multiple complementation clamping parts 9 are held from one of base end 8 Face starts to axially extend, and the quantity of complementary clamping part 9 and position are circumferentially-spaced between the second clamping part 5 of collet 1 It is corresponding.In the present embodiment, there are three complementary clamping parts 9 for the tool of cushion block 2.The circumferential medial surface of complementary clamping part 9 also forms circle Cambered surface.On wherein one end face of the complementary clamping part 9 towards clamped shaft member 10, it is formed with the locating plate axially extended 11.As shown in figure 3, the keyway 13 axially extended is formed on the extremity piece 12 of shaft member 10, when gripping apparatus grips extremity piece 12, Locating plate 11 is suitable for being positioned in a keyway 13 by shape cooperation.Preferably, the cross section of locating plate 11 can be Generally fan-shaped, two sides are arc, avoid the damage to 13 side wall of keyway.

As shown in figures 4 a and 4b, when the pipe end of gripping apparatus grips shaft member 10, cushion block 2 is inserted from second end 7 along axial Enter in collet 1, each complementation clamping part 9 is inserted into respectively in the corresponding interval between the second clamping part 5, to make three second folders It holds portion 5 and three complementary clamping parts 9 is arranged alternately the clamp structure to form annular, the week of the second clamping part 5 and complementary clamping part 9 Inside side forms complete cylindricality clamping face, and the diameter of diameter and 10 pipe end of shaft member is adapted.At this point, base end 8 towards The end face of collet 1 can be connected on the second end face of the clamping part 5 towards base end 8, and the end face of complementary clamping part 9 can be slightly higher In the second clamping part 5 backwards to the end face of base end 8.Due to the first clamping part 4 arc clamping face than the second clamping part 5 arc Clamping face diameter is big, therefore, when the pipe end of shaft member 10 is inserted into clamping device, can avoid the first clamping part 4 easily, and arrives at Second clamping part 5, the end face of shaft member 10 are connected on the end face of base end 8.At this point, by applying radial contracting forces to collet, So that three clamping valves 3 are radially tightened by elastic joint part, therefore the clamping face of the second clamping part 5 is also radially tightened, thus Clamp shaft member 10.

As shown in figure 5a and 5b, when the extremity piece 12 of gripping apparatus grips shaft member 10, due to 12 to the second clamping part 5 of extremity piece The end face of bigger and complementary clamping part 9 is higher than the second clamping part 5 backwards to base portion with the circumferential clamping face diameter of complementary clamping part 9 The end face at end 8, therefore the end face of extremity piece 12 will be connected on the end face of complementary clamping part 9.Meanwhile locating plate 11 is inserted into extremity piece In keyway 13 on 12, the width of locating plate 11 and keyway 13 is adapted, and is played the role of to extremity piece 12 circumferentially positioned.At this point, logical It crosses and radial contracting forces is applied to collet, so that three clamping valves 3 are radially tightened by elastic joint part, therefore the first clamping part 4 Clamping face also radially tighten, to clamp extremity piece 12.

It should be noted that the clamping valve 3 or other quantity that clamping device according to the present utility model includes are (more In one), such as two or four or more, as long as convenient for clamping shaft member.

As before, although being illustrated in explanation by reference to exemplary embodiment of the attached drawing to the utility model, The utility model is not limited to above-mentioned specific embodiment, and the protection scope of the utility model should be by claims and its equivalent Meaning limits.

Appended drawing reference table

1 collet

2 cushion blocks

3 clamping valves

4 first clamping parts

5 second clamping parts

6 first ends

7 second ends

8 base ends

9 complementary clamping parts

10 shaft member

11 locating plates

12 extremity pieces

13 keyways

Claims (10)

1. the clamping device that one kind is used for shaft member (10) comprising collet (1), the collet (1) have multiple mutual elasticity even The clamping valve (3) of the outfit arc-shaped cross-section connect, each clamping valve (3) have towards clamped shaft member (10) in the axial direction First end (6) and second end (7) away from clamped shaft member (10),

It is characterized in that,

Each clamping valve (3) of the collet (1) has the first clamping part (4) and the second clamping part (5) extended radially inward, First clamping part (4) than second clamping part (5) closer to the first end (6) of clamping valve (3), and described the The length that radially extends of one clamping part (4) radially extends length less than second clamping part (5).

2. clamping device according to claim 1, which is characterized in that the clamping device further includes cushion block (2), the pad Block (2) has base end (8) and the multiple complementary clamping parts (9) axially extending to same direction from the base end (8), works as institute Stating cushion block (2), the when of being inserted into the collet (1), each complementation clamping part (9) are inserted into two second respectively from the second end (7) In circumferentially-spaced between clamping part (5), to form the clamp structure of annular.

3. clamping device according to claim 2, which is characterized in that in one of complementary clamping of the cushion block (2) On the axial end face in portion (9), axially extending locating plate (11) are formed with, when the gripping apparatus grips are fixed on the shaft member (10) when extremity piece (12) of one end, the locating plate (11) is located in the keyway (13) of the extremity piece (12).

4. clamping device according to claim 2, which is characterized in that first clamping part (4) and/or second folder The circumferential medial surface for holding portion (5) and/or the complementary clamping part (9) is arc surface.

5. clamping device according to claim 2, which is characterized in that when the cushion block (2) are inserted into the collet (1) When, the base end (8) abuts second clamping part (5) towards the base end (8) towards the end face of the collet (1) End face.

6. clamping device according to claim 2, which is characterized in that when the gripping apparatus grips are fixed on the shaft member (10) when extremity piece (12) of one end, the axial end face of the complementation clamping part (9) is higher than second clamping part (5) backwards to described The end face of base end (8).

7. clamping device according to claim 1, which is characterized in that the center of circle corresponding to the arc of each clamping valve (3) Angle is equal.

8. clamping device according to claim 7, which is characterized in that the circumferential width of first clamping part (4) and institute The circumferential width for stating clamping valve (3) is identical.

9. clamping device according to claim 7, which is characterized in that second clamping part (5) is located at the clamping valve (3) circumferential center.

10. according to claim 1 to clamping device described in one of 9, which is characterized in that there are three clampings for collet (1) tool Valve (3).