CN200988142Y

CN200988142Y - Shaft sleeve fixing clamp

Info

Publication number: CN200988142Y
Application number: CN 200620152327
Authority: CN
Inventors: 葛长存; 马富祥
Original assignee: Jiangsu Wangong Technology Group Co Ltd
Current assignee: Jiangsu Wangong Technology Group Co Ltd
Priority date: 2006-12-27
Filing date: 2006-12-27
Publication date: 2007-12-12
Anticipated expiration: 2016-12-27

Abstract

Disclosed is a shaft sleeve fixing clamp which consists of a base seat, a clamp arranged above the base seat, an ejector pin which is provided between the base seat and the clamp and can move along the self axial line direction, the clamp consists of a base and a plurality of clamping jaws arranged on the base to clamp work-pieces, the upper part of the base is provided with a cone hole whose vertical section has a truncated turbination shape, the lower part of the base is excavated with a cavity, the base between the cone hole and the cavity forms an elastic part, the depth of the elastic part gradually decreases from the center of the cone hole to the circumferential direction, a plurality of clamp jaws are uniformly arranged on a circle whose center is the cone hole's axis, the upper end part of the ejector pin compactly sticks with the elastic part, and the axis line of the ejector pin coincides with the axis of the cone hole. Therefore when the utility model is processing the inner hole, the coaxiality and roundness and cylindricity of the inner hole can be preferably guaranteed, thus percentage of acceptable products is greatly improved, besides, the utility model also has advantages of convenient and rapid operation, high processing efficiency.

Description

Fixing clamp for shaft sleeve

Technical field

The utility model relates to a kind of anchor clamps that are used for fixing axle sleeve class part, particularly is used for fixing the anchor clamps of axle sleeve when processing axle sleeve endoporus.

Background technology

The use of axle sleeve class part in industrial sewing machine is very extensive, and consumption is also bigger, and axiality, circularity and the cylindricity of its endoporus processing are very big to the influence of sewing machine operation conditions.If the endoporus and the external diameter disalignment of axle sleeve can cause sewing machine in process axis and the axle sleeve locking of running up, perhaps axle sleeve rotates together with the axis, and sewing machine can't normally be moved; If the error of the cylindricity of endoporus and circularity is greater than 0.002mm, when sewing machine runs up, will be to contact between axle and the axle sleeve, the wearing and tearing that this can quicken axle sleeve and axle directly influence service life of sewing machine.The anchor clamps that are used for fixing axle sleeve in the prior art have a plurality of movably claws usually, when material loading and blanking, must regulate these claws respectively, move it and workpiece is clamped, this fixture operation trouble, inefficiency, and because a plurality of claw sequentially-operatings also than being easier to part folder partially, cause circularity, cylindricity and the coaxiality error of endoporus of the product that processed bigger, thereby scrappage is higher.

Summary of the invention

The utility model purpose provides accurate, the easy to operate fixing clamp for shaft sleeve of a kind of clamping.

For achieving the above object, the technical solution adopted in the utility model is: a kind of fixing clamp for shaft sleeve, it comprises pedestal, be arranged on the clamp of described pedestal top, between described pedestal and described clamp and the push rod that can move along self direction of axis line, a plurality of claws that described clamp comprises base and is used for holding workpiece, the top of described base has the longitudinal section and is the obconic taper hole of truncation, the axial line of described taper hole and the axial line of described push rod coincide, described a plurality of claw is evenly distributed on the circumference, and the center of circle of this circumference is positioned on the axial line of described taper hole; Cavity has been dug in the bottom of described base, base between described taper hole and the described cavity forms an elastic portion, the thickness of described elastic portion reduces gradually from the middle mind-set circumferencial direction of described taper hole, and the upper end of described push rod pushes against on described elastic portion.

Be provided with eccentric shaft on the described pedestal rotationally, described eccentric shaft comprises that the main shaft part that is connected with the pedestal phase pivot, the axial line that departs from main shaft part are arranged on the eccentric part of the end of described main shaft part, described push rod is between described elastic portion and described eccentric shaft, and the bottom of described push rod is against on the described eccentric part.Described eccentric part and described main shaft part are wholely set.

Described claw comprises from the upwardly extending elastic arm of the base of described taper hole sidepiece and is threaded in adjusting bolt on the described elastic arm, and the plane at the axial line place of described a plurality of adjusting bolts constitutes the plane of a plurality of axial lines perpendicular to described taper hole.

Because the technique scheme utilization, the utility model compared with prior art has following advantage: the utility model moves up and down the extruding elastic portion by push rod, by the elastic force of elastic portion, makes a plurality of claws open simultaneously or shrink, and reaches purpose easy to setup; In addition, the adjusting bolt that is in a plurality of Different Plane is fixed workpiece to be processed on a plurality of height, thereby make the utility model when the processing endoporus, can guarantee the axiality of endoporus and the circularity and the cylindricity of endoporus preferably, therefore can improve the percentage of A-class goods of product greatly.

Description of drawings

Accompanying drawing 1 is a front view of the present utility model;

Accompanying drawing 2 is a left view of the present utility model;

Accompanying drawing 3 is the vertical view of clamp of the present utility model;

Accompanying drawing 4 is along the cutaway view of A-A in the accompanying drawing 3;

Accompanying drawing 5 is the front view of pedestal of the present utility model;

Wherein: 1, pedestal; 2, clamp; 21, base; 22, taper hole; 23, elastic portion; 24, claw; 25, cavity; 241, regulate bolt; 242, elastic arm; 3, eccentric shaft; 31, eccentric part; 32, main shaft part; 4, push rod; 5, workpiece.

The specific embodiment

Referring to accompanying drawing 1 to shown in the accompanying drawing 5, a kind of fixing clamp for shaft sleeve, it comprises pedestal 1, is fixedly installed on the clamp 2 of pedestal 1 top, between pedestal 1 and clamp 2 and the push rod 4 that can move along self direction of axis line.Wherein, clamp 2 comprises base 21 and is arranged on a plurality of claws 24 that are used for holding workpiece 5 on the base 21, the top of base 21 have the longitudinal section be the obconic taper hole 22 of truncation (described in this specification " on ", D score position relation concerns corresponding with upper and lower position shown in the accompanying drawing 1), the axial line of the axial line of taper hole 22 and push rod 4 coincides, a plurality of claws 24 are evenly distributed on the circumference, and the center of circle of this circumference is positioned on the axial line of described taper hole 22.Cavity 25 has been dug in the bottom of base 21, and the base 23 between taper hole 22 and the cavity 25 forms an elastic portion 23, and the thickness of elastic portion 23 reduces gradually from the middle mind-set circumferencial direction of taper hole 22.

Be provided with eccentric shaft 3 on the pedestal 1 rotationally, described eccentric shaft 3 comprises that the main shaft part 32 that is connected with pedestal 1 phase pivot, the axial line that departs from main shaft part 32 are arranged on the eccentric part 31 of the end of described main shaft part 32, eccentric part 31 is arranged on the end of main shaft part 32 and extends along the direction of axis line of main shaft part 32, push rod 4 is between elastic portion 23 and eccentric shaft 3, and the upper end of push rod 4 pushes against on elastic portion 23, and the bottom just is against on the eccentric part 31.Usually processing for convenience, described eccentric part 31 all is wholely set with main shaft part 32.

Claw 24 comprises from the base 21 upwardly extending elastic arms 242 of taper hole 22 sidepieces and is threaded in adjusting bolt 241 on the elastic arm 242, regulate of the radially setting of the axial line of bolt 241 along taper hole 22, the plane at the axial line place of described a plurality of adjusting bolts 24 1 constitutes the plane of a plurality of axial lines perpendicular to described taper hole 22, therefore these adjusting bolts 241 can clamp it at the differing heights place of workpiece 5, thereby avoid workpiece 5 deflections.

In formal first being processed, at first the utility model is fixed on the chuck of internal grinder, adjust the adjustment screw 241 on the claw 24, the end of a plurality of adjustment screw 241 roughly is positioned on the same circumference, and the diameter of this circumference is slightly less than the external diameter of workpiece 5, start internal grinder then, the end of a plurality of adjustment screw 241 is milled to the external diameter size of workpiece 5 with interior round grinding abrasive disk, last rotation eccentric axis 3, push rod 4 is moved up under the promotion of eccentric part 31, thereby hold out against elastic portion 23, elastic portion 23 is arched upward upward, this moment, a plurality of claws 24 outwards opened, and workpiece 5 is placed between a plurality of claws 24; Be rotated further eccentric shaft 3 again and make push rod 4 be in backhaul, elastic portion 23 is restored automatically, thereby a plurality of claws 24 are shunk, and clamping work pieces 5.

The bottom of workpiece 5 is placed in the taper hole 22, and a plurality of adjusting bolts 241 are through grinding in advance, its end surrounds the face of cylinder that axial line is identical with the axial line of described fixing clamp for shaft sleeve jointly, this axial line also is the axial line of taper hole 22, therefore when the simultaneously inside clamping work pieces 5 of claw 24, can guarantee that the outside wall surface of the workpiece 5 that pressed from both sides is parallel to the axial line of described fixing clamp for shaft sleeve.So the utility model can guarantee the axiality of endoporus and the circularity and the cylindricity of endoporus preferably when the processing endoporus, therefore can improve the percentage of A-class goods of product greatly, in addition, the utility model also has convenient to operation, advantage of high processing efficiency.

The utlity model has better elasticity for making, the 45# steel of clamp 2 whole employings behind heat treatment quenching and tempering processes, and therefore can guarantee elastic portion 23 and a plurality of claw 24 better elastic.

Claims

1, a kind of fixing clamp for shaft sleeve, it is characterized in that: it comprises pedestal (1), be arranged on the clamp (2) of described pedestal (1) top, the push rod (4) that is positioned between described pedestal (1) and the described clamp (2) and can moves along self direction of axis line, a plurality of claws (24) that described clamp (2) comprises base (21) and is used for holding workpiece (5), the top of described base (21) has the longitudinal section and is the obconic taper hole of truncation (22), the axial line of the axial line of described taper hole (22) and described push rod (4) coincides, described a plurality of claw (24) is evenly distributed on the circumference, and the center of circle of this circumference is positioned on the axial line of described taper hole (22); Cavity (25) has been dug in the bottom of described base (21), base (21) between described taper hole (22) and the described cavity (25) forms an elastic portion (23), the thickness of described elastic portion (23) reduces gradually from the middle mind-set circumferencial direction of described taper hole (22), and the upper end of described push rod (4) pushes against on described elastic portion (23).

2, fixing clamp for shaft sleeve according to claim 1, it is characterized in that: be provided with eccentric shaft (3) on the described pedestal (1) rotationally, described eccentric shaft (3) comprises that the main shaft part (32) that is connected with pedestal (1) phase pivot, the axial line that departs from main shaft part (32) are arranged on the eccentric part (31) of the end of described main shaft part (32), described push rod (4) is positioned between described elastic portion (23) and the described eccentric shaft (3), and the bottom of described push rod (4) is against on the described eccentric part (31).

3, fixing clamp for shaft sleeve according to claim 2 is characterized in that: described eccentric part (31) is wholely set with described main shaft part (32).

4, fixing clamp for shaft sleeve according to claim 1, it is characterized in that: described claw (24) comprises from the upwardly extending elastic arm of base (21) (242) of described taper hole (22) sidepiece and is threaded in adjusting bolt (241) on the described elastic arm (242), and the plane at the axial line place of described a plurality of adjusting bolts (241) constitutes the plane of a plurality of axial lines perpendicular to described taper hole (22).