CN107414215B

CN107414215B - Clamping head

Info

Publication number: CN107414215B
Application number: CN201710848018.0A
Authority: CN
Inventors: 林海波; 潘万贵; 曹博涵
Original assignee: Taizhou Vocational and Technical College
Current assignee: Taizhou Vocational and Technical College
Priority date: 2017-09-19
Filing date: 2017-09-19
Publication date: 2023-09-12
Anticipated expiration: 2037-09-19
Also published as: CN107414215A

Abstract

The invention provides a chuck, and belongs to the field of fixed clamps. It has solved the problem that current chuck centre gripping scope is little. The clamping head comprises an intermediate body, an adjusting bolt and a pair of cover plates, wherein a through installation hole which is polygonal is formed in the intermediate body, a plurality of sliding blocks are arranged in the installation hole, a clamping opening is formed between the sliding blocks in a surrounding mode, inclined planes which are obliquely arranged are formed in the sliding blocks, one sliding block of the plurality of sliding blocks is recorded as a first sliding block, a clamping groove is formed in the first sliding block, a threaded hole is further formed in the intermediate body, the threaded hole is communicated with the installation hole, the adjusting bolt penetrates through the threaded hole, the inner end of the adjusting bolt is provided with a clamping portion which protrudes outwards along the radial direction of the adjusting bolt, the clamping portion is located in the clamping groove to enable the adjusting bolt to be clamped with the first sliding block, the pair of cover plates are fixedly connected to two sides of the intermediate body respectively, a through hole which is penetrated is formed in the cover plates, and the clamping opening are correspondingly arranged. The chuck has the advantage of large clamping range.

Description

Clamping head

Technical Field

The invention belongs to the technical field of fixed clamps, and relates to a chuck, in particular to a tap chuck.

Background

In turning parts, large-bore internal threads can be turned by using an internal thread turning tool, small-bore internal threads are difficult to be turned by using the internal thread turning tool, and mainly a thread bottom hole is drilled after turning is finished, and then a reaming bar is used for manual tapping. The tapping work efficiency is low according to the traditional processing method, the perpendicularity error between the tapped thread and the workpiece is large, and the tapping quality is low.

Various improvements have been made to the above problems, and patents have been filed, for example, chinese patent literature discloses a tapping bar for lathe [ application number: 201220217549.2; authorized bulletin number: CN202655744U ], which comprises a tap, a drill chuck, a chuck handle, a chuck seat body, a sliding guide rod and a cutter bar seat, wherein the front end of the chuck handle extends out of the chuck seat body and is provided with a morse No. 2 taper handle; the rear end face of the drill chuck is provided with a groove matched with the Morse No. 2 taper shank; the drill chuck and the chuck handle are tightly matched pieces; the screw tap is arranged at the front end of the drill chuck; the screw tap, the clamp handle, the clamp seat body, the sliding guide rod and the axis of the cutter bar seat are on the same straight line.

The tapping cutter bar for the lathe with the structure has high working efficiency and ensures form and position tolerance; however, the size of the clamping opening for clamping the tap in the drill chuck cannot be changed, namely the size of the clamping opening is fixed, the drill chuck with the structure can only clamp the tap with a specific size, and the clamping range of the drill chuck is small, so that the processing range of the tapping cutter bar for the lathe with the structure is small.

Disclosure of Invention

The invention aims at solving the problems in the prior art, and provides a chuck which solves the technical problem of how to improve the clamping range of the chuck.

The aim of the invention can be achieved by the following technical scheme: the utility model provides a chuck, includes the midbody, its characterized in that still includes adjusting bolt and a pair of apron, have the mounting hole that runs through and be the polygon in the midbody, be equipped with a plurality of slider in the mounting hole, enclose into a centre gripping mouth between a plurality of slider, one side of slider is pasted and is leaned on the lateral wall of the mounting hole that corresponds, all have the inclined plane that the slope set up on the slider, the inclined plane of two adjacent sliders is laminated mutually, one of them slider in a plurality of slider is recorded as first slider, have the draw-in groove on the first slider, still have the screw hole in the midbody, the screw hole is linked together with the mounting hole, adjusting bolt wears to establish in the screw hole, adjusting bolt's inner has along the radially outwards bellied joint portion of adjusting bolt, the joint position is located the draw-in groove makes adjusting bolt and first slider joint, a pair of apron link firmly the both sides at the midbody respectively, have the through-hole that runs through in the apron, through-hole and centre gripping mouth correspond the setting.

The working principle of the chuck is as follows: through rotatory adjusting bolt, can promote first slider and remove, thereby first slider removes and can drive other sliders and form the linkage and change the size of centre gripping mouth, makes this chuck can the tap of the not equidimension of centre gripping, improves the centre gripping scope of chuck. The cover plates prevent the sliding blocks from falling from the mounting holes, wherein a through hole in one cover plate is used for a screw tap to pass through, and a through hole in the other cover plate is used for the chuck handle to be embedded and fixedly connected; the clamping portion of the adjusting bolt is embedded into the clamping groove to enable the adjusting bolt to be clamped with the first sliding block, the first sliding block can be driven to move through rotating the adjusting bolt, one side of the sliding block is attached to the side wall of the corresponding mounting hole, the inclined planes of the two adjacent sliding blocks are attached to each other, the first sliding block moves to drive the adjacent sliding blocks to link along the inclined planes, so that the size of the clamping opening is changed, the size of the clamping opening is adjusted conveniently, the sliding block can be extruded and fixed to the screw tap through rotating the adjusting bolt, the fixed firmness is high, and the screw tap is fixedly connected conveniently.

In the above chuck, the clamping groove is located at one end of the first slider near the adjusting bolt, the clamping groove penetrates through the first slider, a pair of clamping strips protruding inwards are arranged at the top of the inner side wall of the clamping groove, and the clamping part can abut against the clamping strips to enable the adjusting bolt to be clamped with the first slider. During installation, the clamping part of the adjusting bolt stretches into the installation hole firstly, then one end of the clamping groove faces the adjusting bolt, the clamping part is embedded into the clamping groove, the first sliding block is pushed, the right-angle edge of the first sliding block is abutted against the side wall of the installation hole, the clamping part is located in the clamping groove, the clamping part can be abutted against the clamping strip, and the adjusting bolt is clamped with the first sliding block.

In the chuck, the other one of the plurality of sliding blocks is denoted as a second sliding block, one end of the second sliding block, which is close to the adjusting bolt, is provided with an embedded groove, and part of the adjusting bolt can be embedded into the embedded groove. The slider can remove in the mounting hole, and the setting of embedded groove makes the second slider can not block each other with adjusting bolt to make the slider remove smoothly, the size of clamping mouth is adjustable, improves the centre gripping scope of this chuck, and improves the firm degree of chuck centre gripping.

In the chuck, the adjusting bolt further comprises a head, a rod and a transition part, the head is connected with the clamping part through the rod and the transition part, the head, the rod, the transition part and the clamping part are of an integrated structure, the outer side wall of the rod is provided with an external thread, the outer side wall of the transition part is smooth, the outer diameter of the clamping part is larger than the outer diameter of the transition part along the radial direction of the rod, and the outer diameter of the clamping part is smaller than the large diameter of the external thread. The rod part is in threaded connection with the intermediate body, the outer diameter of the clamping part is larger than the outer diameter of the transition part, the clamping part can be embedded into the clamping groove and can be clamped with the clamping strip, the outer diameter of the clamping part is smaller than the large diameter of the external thread, and the clamping part can penetrate through the threaded hole.

In the above chuck, one end of the clamping portion far away from the transition portion is hemispherical, the bottom of the clamping groove is arc-shaped, and when the clamping portion is located in the clamping groove, the outer side wall of the clamping portion is in clearance fit with the inner side wall of the clamping groove. The structure ensures that the contact area between the clamping part and the first sliding block is large, the matching is tight, the adjusting bolt can better drive the first sliding block to move, and the stability of the clamping head and the firmness of the clamping head are improved.

In one of the above-described cartridges, the outer side wall of the intermediate body has a flat surface thereon, which is matched to the head of the adjusting bolt. The head of the adjusting bolt can be propped against a plane, and the design is reasonable.

In the chuck, the through hole is circular, and the diameter of the through hole is larger than the inner diameter of the clamping opening. The through hole can not obstruct the insertion of the tap, so that the clamping range of the chuck is improved.

In the chuck, the thickness of the cover plate is 1-2cm. The thickness of the cover plate is thicker, the installation stability of the sliding block is improved, and the firmness of the connection of the chuck and the chuck handle is high.

In the chuck, the intermediate body is provided with a plurality of through fixing holes, and the fastening piece penetrates through the cover plate and is arranged in the fixing holes in a penetrating manner so that the cover plate is fixedly connected with the intermediate body. The fixing is carried out through the fastener, and the fixing firmness is high.

In the chuck, the number of the sliding blocks is four, the sliding blocks are respectively a first sliding block, a second sliding block, a third sliding block and a fourth sliding block, the cross section of the mounting hole is square, the cross sections of the first sliding block, the second sliding block, the third sliding block and the fourth sliding block are rectangular quadrilaterals, right-angle edges of the first sliding block, the second sliding block, the third sliding block and the fourth sliding block can be attached to two adjacent side walls corresponding to the mounting hole, and a clamping opening enclosed by the first sliding block, the second sliding block, the third sliding block and the fourth sliding block is square. The tail end of the tap is generally square, the number of the sliding blocks in the chuck is just four and is matched with the tap, and the chuck is mainly used for clamping the tap.

Compared with the prior art, the chuck provided by the invention has the following advantages:

1. the clamping head changes the position of the sliding block through rotating the adjusting bolt, so that the size of the clamping opening is changed, the clamping head can clamp taps with different sizes, the clamping range is wide, the size of the clamping opening can be changed and a workpiece can be clamped through rotating the adjusting bolt, the operation is convenient, and the clamping firmness is high.

2. The inner end of the chuck adjusting bolt is provided with the clamping part, the first sliding block is provided with the clamping groove, and the clamping part and the clamping groove are in clearance fit, so that the adjusting bolt can drive the sliding block to move more stably, and the stability and the clamping firmness of the chuck are improved.

Drawings

Fig. 1 is a cross-sectional view of the present chuck.

Fig. 2 is a side view of the present chuck.

Fig. 3 is a state diagram of the chuck.

Fig. 4 is a second state diagram of the chuck.

Fig. 5 is a schematic structural view of the present chuck adjusting bolt.

Fig. 6 is a schematic structural view of a first slider of the chuck.

Fig. 7 is a schematic structural view of a second slider of the chuck.

In the figure, 1, an intermediate; 2. an adjusting bolt; 21. a clamping part; 22. a head; 23. a stem portion; 24. a transition section; 3. a cover plate; 4. a mounting hole; 5. a slide block; 51. a first slider; 52. a second slider; 53. a third slider; 54. a fourth slider; 6. a clamping opening; 7. a clamping groove; 8. a threaded hole; 9. a through hole; 10. clamping strips; 11. an embedding groove; 12. a plane; 13. a fixing hole; 14. a fastener.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3 and 4, the chuck comprises an intermediate body 1, an adjusting bolt 2, a pair of cover plates 3 and a sliding block 5. In this embodiment, the intermediate body 1 has four through fixing holes 13, in actual production, the intermediate body 1 may have six through fixing holes 13, the cover plate 3 is fixedly connected with the intermediate body 1 by passing fasteners 14 such as bolts through the cover plate 3 and passing through the fixing holes 13, a pair of cover plates 3 are respectively fixedly connected at two sides of the intermediate body 1, the cover plate 3 has through holes 9, the through holes 9 are circular, in this embodiment, the thickness of the cover plate 3 is 1.5cm, in actual production, the thickness of the cover plate 3 may be 1cm or 2cm.

In this embodiment, the middle body 1 has a through and regular quadrilateral mounting hole 4, four sliders 5 are disposed in the mounting hole 4, the first slider 51, the second slider 52, the third slider 53 and the fourth slider 54 are respectively arranged in a counterclockwise direction, the cross sections of the first slider 51, the second slider 52, the third slider 53 and the fourth slider 54 are all rectangular quadrilaterals, the right-angle sides of the first slider 51, the second slider 52, the third slider 53 and the fourth slider 54 can be respectively attached to two adjacent side walls corresponding to the mounting hole 4, one side of each slider 5 is attached to the corresponding side wall of the mounting hole 4, the number of the sliders 5 is the same as that of the side walls of the mounting hole 4, and in actual production, the cross sections of the mounting hole 4 can be regular triangles or regular hexagons, and three sliders 5 or six sliders 5 can be disposed in the mounting hole 4. The slide blocks 5 are provided with inclined planes which are obliquely arranged, the inclined planes of two adjacent slide blocks 5 are attached, namely, the inclined plane of the first slide block 51 is attached to the inclined plane of the second slide block 52, the inclined plane of the second slide block 52 is attached to the inclined plane of the third slide block 53, the inclined plane of the third slide block 53 is attached to the inclined plane of the fourth slide block 54, the inclined plane of the fourth slide block 54 is attached to the inclined plane of the first slide block 51, and a square clamping opening 6 is formed by encircling the first slide block 51, the second slide block 52, the third slide block 53 and the fourth slide block 54. The clamping opening 6 and the through hole 9 are coaxially arranged, and the diameter of the through hole 9 is larger than the inner diameter of the clamping opening 6.

The middle body 1 is provided with a threaded hole 8, the threaded hole 8 is communicated with the mounting hole 4, the adjusting bolt 2 is arranged in the threaded hole 8 in a penetrating mode, the outer side wall of the middle body 1 is provided with a plane 12, and the plane 12 is matched with the head 22 of the adjusting bolt 2. As shown in fig. 5, the adjusting bolt 2 includes a head 22, a rod 23, a transition portion 24 and a clamping portion 21, the head 22 is connected with the clamping portion 21 through the rod 23 and the transition portion 24, the head 22, the rod 23, the transition portion 24 and the clamping portion 21 are of an integral structure, an external thread is provided on an outer side wall of the rod 23, the outer side wall of the transition portion 24 is smooth, the clamping portion 21 protrudes outwards along a radial direction of the adjusting bolt 2, an outer diameter of the clamping portion 21 is larger than an outer diameter of the transition portion 24 along a radial direction of the rod 23, an outer diameter of the clamping portion 21 is smaller than a large diameter of the external thread, and one end of the clamping portion 21 away from the transition portion 24 is hemispherical.

As shown in fig. 6, the first slider 51 has a clamping groove 7, the clamping groove 7 is located at one end of the first slider 51 near the adjusting bolt 2, the clamping groove 7 penetrates through the first slider 51, the top of the inner side wall of the clamping groove 7 has a pair of clamping bars 10 protruding inwards, the bottom of the clamping groove 7 is arc-shaped, the clamping part 21 is embedded into the clamping groove 7, the clamping part 21 can abut against the clamping bars 10, and the outer side wall of the clamping part 21 is in clearance fit with the inner side wall of the clamping groove 7. As shown in fig. 7, the second slider 52 has an insertion groove 11 at an end near the adjusting bolt 2, and a part of the adjusting bolt 2 can be inserted into the insertion groove 11.

During assembly, the adjusting nut is firstly rotated to enable the adjusting nut to penetrate into the threaded hole 8, the transition part 24 and the clamping part 21 of the adjusting nut are located in the mounting hole 4, then the first sliding block 51 is placed in the mounting hole 4, the first sliding block 51 is located at the left end of the adjusting nut, the clamping groove 7 faces the transition part 24 and the clamping part 21, the first sliding block 51 is moved in parallel, the clamping part 21 extends into the clamping groove 7, at the moment, the clamping part 21 is clamped with the clamping strip 10, the first sliding block 51 is clamped with the adjusting bolt 2, the first sliding block 51 is moved in parallel until one right-angle side of the first sliding block 51 abuts against the side wall of the mounting hole 4, then the second sliding block 52, the third sliding block 53 and the second sliding block 52 are sequentially placed in the anticlockwise order, and then the cover plate 3 is fixedly connected with the intermediate body 1 through the fastener 14.

When the tap is fixed, the adjusting bolt 2 is rotated anticlockwise, the adjusting bolt 2 pulls the first sliding block 51 to move upwards, the first sliding block 51 pushes the second sliding block 52 to move leftwards, the second sliding block 52 pushes the third sliding block 53 to move downwards, the third sliding block 53 pushes the fourth sliding block to move rightwards, so that the clamping opening 6 is opened and enlarged, the tail end of the tap is inserted into the clamping opening 6, the adjusting bolt 2 is rotated clockwise again, the adjusting bolt 2 pushes the first sliding block 51 to move downwards, the first sliding block 51 pushes the fourth sliding block 54 to move leftwards, the fourth sliding block 54 pushes the third sliding block 53 to move upwards, the third sliding block 53 pushes the second sliding block to move rightwards, part of the adjusting bolt 2 is embedded into the embedded groove 11 until the tap is clamped by the first sliding block 51, the second sliding block 52, the third sliding block 53 and the fourth sliding block 54, and tapping is carried out by using the tap.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the intermediate body 1, the adjusting bolt 2, the clamping portion 21, the head portion 22, the rod portion 23, the transition portion 24, the cover plate 3, the mounting hole 4, the slider 5, the first slider 51, the second slider 52, the third slider 53, the fourth slider 54, the clamping opening 6, the clamping groove 7, the threaded hole 8, the through hole 9, the clamping bar 10, the insertion groove 11, the flat surface 12, the fixing hole 13, the fastener 14, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.

Claims

1. The chuck comprises an intermediate body (1), and is characterized by further comprising an adjusting bolt (2) and a pair of cover plates (3), wherein a through and polygonal mounting hole (4) is formed in the intermediate body (1), a plurality of sliding blocks (5) are arranged in the mounting hole (4), a clamping opening (6) is formed between the plurality of sliding blocks (5) in a surrounding mode, one side of each sliding block (5) is abutted to the side wall of the corresponding mounting hole (4), inclined planes which are obliquely arranged are respectively arranged on the sliding blocks (5), the inclined planes of two adjacent sliding blocks (5) are abutted, one sliding block (5) in the plurality of sliding blocks (5) is recorded as a first sliding block (51), a clamping groove (7) is formed in the first sliding block (51), a threaded hole (8) is formed in the intermediate body (1), the threaded hole (8) is communicated with the mounting hole (4), the adjusting bolt (2) is arranged in the threaded hole (8) in a penetrating mode, the inner end of each adjusting bolt (2) is provided with a clamping part (21) which protrudes outwards in the radial direction along the adjusting bolt (2), one clamping part (21) is recorded on the adjacent to the inclined plane of the two sliding blocks (5) is provided with a first sliding block (51), one end (7) which is located on the opposite to the first sliding block (7) and is located on the inner side of the first sliding block (7) and is opposite to the first sliding block (7), the clamping part (21) is located in the clamping groove (7), the clamping part (21) is abutted to the clamping strip (10) to enable the adjusting bolt (2) to be clamped with the first sliding block (51), the cover plate (3) is fixedly connected to two sides of the intermediate body (1) respectively, the cover plate (3) is provided with a through hole (9) penetrating through the intermediate body, the through hole (9) and the clamping opening (6) are correspondingly arranged, the other sliding block (5) in the plurality of sliding blocks (5) is recorded as a second sliding block (52), one end, close to the adjusting bolt (2), of the second sliding block (52) is provided with an embedded groove (11), and part of the adjusting bolt (2) can be embedded into the embedded groove (11).

2. The chuck according to claim 1, wherein the adjusting bolt (2) further comprises a head (22), a rod (23) and a transition part (24), the head (22) is connected with the clamping part (21) through the rod (23) and the transition part (24), the head (22), the rod (23), the transition part (24) and the clamping part (21) are of an integrated structure, the outer side wall of the rod (23) is provided with an external thread, the outer side wall of the transition part (24) is smooth, the outer diameter of the clamping part (21) is larger than the outer diameter of the transition part (24) along the radial direction of the rod (23), and the outer diameter of the clamping part (21) is smaller than the large diameter of the external thread.

3. A chuck according to claim 2, characterized in that the end of the clamping part (21) remote from the transition part (24) is hemispherical, the bottom of the clamping groove (7) is arc-shaped, and when the clamping part (21) is positioned in the clamping groove (7), the outer side wall of the clamping part (21) is in clearance fit with the inner side wall of the clamping groove (7).

4. A chuck according to claim 2, characterized in that the intermediate body (1) has a flat surface (12) on its outer side wall, which flat surface (12) is matched to the head (22) of the adjusting bolt (2).

5. A chuck according to claim 1 or 2 or 3 or 4, characterized in that the through hole (9) is circular, the diameter of the through hole (9) being larger than the inner diameter of the clamping opening (6).

6. A chuck according to claim 1 or 2 or 3 or 4, characterized in that the thickness of the cover plate (3) is 1-2cm.

7. A chuck according to claim 1 or 2 or 3 or 4, characterized in that the intermediate body (1) has a number of through-going fastening holes (13), through which fastening members (14) pass through the cover plate (3) and which are arranged in the fastening holes (13) in order to fasten the cover plate (3) to the intermediate body (1).

8. A chuck according to claim 1, 2, 3 or 4, characterized in that the number of the sliding blocks (5) is four, namely a first sliding block (51), a second sliding block (52), a third sliding block (53) and a fourth sliding block (54), the cross section of the mounting hole (4) is square, the cross sections of the first sliding block (51), the second sliding block (52), the third sliding block (53) and the fourth sliding block (54) are rectangular quadrilaterals, and the right-angle edges of the first sliding block (51), the second sliding block (52), the third sliding block (53) and the fourth sliding block (54) can be respectively attached to two adjacent side walls corresponding to the mounting hole (4), and a clamping opening (6) enclosed between the first sliding block (51), the second sliding block (52), the third sliding block (53) and the fourth sliding block (54) is square.