CN207127360U - A kind of chuck - Google Patents

Abstract

The utility model provides a collet, which belongs to the field of fixing fixtures. It solves the problem that the clamping range of the existing chuck is small. This kind of chuck includes an intermediate body, adjusting bolts and a pair of cover plates. The intermediate body has a penetrating and polygonal installation hole. Several sliders are arranged in the installation hole, and a clip is formed between several sliders. There is a slant on the slider, and one of the sliders is marked as the first slider. The first slider has a card slot, and there is a threaded hole in the middle body. The threaded hole is the same as the The mounting holes are connected, and the adjusting bolt is passed through the threaded hole. The inner end of the adjusting bolt has a clamping portion protruding outward along the radial direction of the adjusting bolt, and the clamping portion is located in the clamping groove so that the adjusting bolt and the first slider are in contact with each other. Clamping, a pair of cover plates are fixedly connected to both sides of the intermediate body respectively, the cover plate has a through hole through it, and the through hole and the clamping port are arranged correspondingly. The chuck has the advantage of a large clamping range.

Description

a chuck

technical field

The utility model belongs to the technical field of fixing clamps, and relates to a chuck, in particular to a screw tap chuck.

Background technique

In turning parts, large-diameter internal threads can be turned with internal thread turning tools, and small-diameter internal threads are difficult to turn with internal thread turning tools. The bars are hand-tapped. According to the traditional processing method, the tapping work efficiency is low, the verticality error between the tapped thread and the workpiece is relatively large, and the tapping quality is low.

For the above existing problems, people have made various improvements, and some have also applied for patents. For example, Chinese patent literature discloses a tapping tool holder for lathes [application number: 201220217549.2; authorization announcement number: CN202655744U ], which includes a tap, a drill chuck, a chuck handle, a chuck base, a sliding guide rod and a tool holder, and the front end of the chuck handle protrudes from the chuck base and is processed with a Morse No. 2 taper handle; the drill The rear end of the chuck is provided with a groove matching the Morse No. 2 taper shank; the drill chuck and the chuck shank are tightly fitted parts; the tap is installed at the front end of the drill chuck; the tap, the chuck handle, the chuck body, the slide The axes of the shift guide rod and the tool holder seat are on the same straight line.

The tapping tool holder for lathe with this structure has high working efficiency and ensures the tolerance of shape and position; however, for the tapping tool holder for lathe with this structure, the size of the clamping opening for clamping the tap in the drill chuck cannot be changed. Yes, that is, the size of the clamping port is fixed. The drill chuck with this structure can only clamp taps of a specific size. Small.

Contents of the invention

The purpose of this utility model is to propose a collet for the above-mentioned problems existing in the prior art, and the technical problem to be solved is how to improve the clamping range of the collet.

The purpose of this utility model can be achieved through the following technical solutions: a chuck, including an intermediate body, characterized in that it also includes an adjusting bolt and a pair of cover plates, and the intermediate body has a through and polygonal mounting hole , the mounting hole is provided with several sliders, a clamping opening is formed between the several sliders, one side of the slider is attached to the side wall of the corresponding mounting hole, and the slider is All have slopes arranged obliquely, and the slopes of two adjacent sliders fit together. One of the sliders in several sliders is marked as the first slider, and the first slider has a card slot. There is also a threaded hole in the intermediate body, the threaded hole communicates with the mounting hole, the adjusting bolt is passed through the threaded hole, and the inner end of the adjusting bolt has a clamping part protruding outward along the radial direction of the adjusting bolt , the clamping part is located in the clamping groove so that the adjustment bolt and the first slider are clamped together, and a pair of the cover plates are respectively fixedly connected to both sides of the intermediate body, and the cover plates have a through hole , the through hole and the clamping port are set correspondingly.

The working principle of the chuck: by rotating the adjusting bolt, the first slider can be pushed to move, and the movement of the first slider can drive the rest of the sliders to form a linkage to change the size of the clamping port, so that the chuck can clamp different sizes. Tap to increase the clamping range of the collet. The cover plate prevents the slider from falling off from the mounting hole. The through hole in one of the cover plates is for the tap to pass through, and the through hole in the other cover plate is for the chuck handle to be embedded and fixed; the clamping part of the adjusting bolt is embedded in the clamping The adjusting bolt and the first slider are clamped in the groove, and the first slider can be driven to move by rotating the adjusting bolt, and one side of the slider is attached to the side wall of the corresponding mounting hole, and the two adjacent The slopes of the sliders fit together, and the movement of the first slider drives the adjacent sliders to move along the slope, thereby changing the size of the clamping opening. The screw tap is fixed by extrusion, the fixing degree is high, and it is convenient to fix the screw tap.

In the above-mentioned chuck, the slot is located at the end of the first slider close to the adjusting bolt, the slot runs through the first slider, and the top of the inner wall of the slot has a pair of inwardly protruding The clamping part is capable of abutting against the clamping bar so that the adjusting bolt and the first sliding block are clamped. When installing, first extend the clamping part of the adjusting bolt into the mounting hole, then put one end of the clamping slot against the adjusting bolt, so that the clamping part is embedded in the clamping groove, and then push the first slider to make the first slider The right-angled side of the block is against the side wall of the mounting hole. At this time, the clamping part is located in the clamping groove and the clamping part can be against the clamping bar, so that the adjusting bolt and the first slider are clamped together, and the installation is convenient. .

In the above-mentioned chuck, the other slider among the several sliders is marked as the second slider, and the end of the second slider near the adjusting bolt has an embedding groove, and part of the adjusting bolts can be embedded into the embedding in the slot. The slider can move in the mounting hole. The setting of the embedded groove prevents the second slider from being stuck with the adjusting bolt, so that the slider can move smoothly, and the size of the clamping opening can be adjusted to improve the clamping capacity of the chuck. Hold range, and improve the firmness of chuck clamping.

In the above-mentioned chuck, the adjusting bolt further includes a head, a rod and a transition part, the head is connected to the clamping part through the rod and the transition, and the head, the rod and the transition It has an integral structure with the clamping part, the outer wall of the rod part has external threads, the outer wall of the transition part is smooth, and along the radial direction of the rod part, the outer diameter of the clamping part is larger than the outer diameter of the transition part diameter, the outer diameter of the clamping portion is smaller than the major diameter of the external thread. The rod part is threadedly connected with the intermediate body, the outer diameter of the snap-in part is larger than the outer diameter of the transition part, so that the snap-in part can be embedded in the slot and the snap-in part can be snap-fitted with the clip bar, and the outer diameter of the snap-in part It is smaller than the major diameter of the external thread, so that the clamping part can pass through the threaded hole.

In the above-mentioned chuck, the end of the clamping part away from the transition part is hemispherical, the bottom of the clamping groove is arc-shaped, and when the clamping part is in the clamping groove, the outside of the clamping part The wall is in clearance fit with the inner side wall of the slot. This structure makes the contact area between the clamping part and the first sliding block large and closely matched, and the adjusting bolt can better drive the first sliding block to move, thereby improving the stability and firmness of the chuck.

In the above-mentioned chuck, the outer wall of the intermediate body has a plane, and the plane matches the head of the adjusting bolt. The head of the adjusting bolt can lean against the plane, and the design is reasonable.

In the above-mentioned 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 will not hinder the insertion of the tap, which improves the clamping range of the chuck.

In the above-mentioned chuck, the thickness of the cover plate is 1-2 cm. The thickness of the cover plate is thicker, which improves the installation stability of the slide block, and makes the connection between the chuck and the chuck handle more firm.

In the above-mentioned chuck, the intermediate body has several through fixing holes, and the fasteners are passed through the cover plate and inserted in the fixing holes so that the cover plate and the intermediate body are fixedly connected. Fastened by fasteners, the firmness of the fastened connection is high.

In the above-mentioned chuck, the number of the sliders is four, which are respectively the first slider, the second slider, the third slider and the fourth slider, and the cross section of the mounting hole is a square , the cross-sections of the first slider, the second slider, the third slider and the fourth slider are all right-angled quadrilaterals, and the first slider, the second slider, the third slider and the fourth slider The right-angled sides of the block can be attached to the two adjacent side walls corresponding to the mounting hole, and the clamping block formed between the first slider, the second slider, the third slider and the fourth slider The mouth is square. The tail end of the tap is generally square, and the number of sliders in the chuck is exactly four, matching with the tap, and the chuck is mainly used for clamping the tap.

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

1. The chuck can change the position of the slider by rotating the adjusting bolt, thereby changing the size of the clamping mouth, so that the chuck can clamp taps of different sizes, and the clamping range is wide, and it can be achieved by rotating the adjusting bolt Changing the size of the clamping opening and clamping the workpiece is easy to operate and the clamping firmness is high.

2. The inner end of the adjusting bolt of the chuck has a clamping part, and the first slider has a clamping groove. The gap between the clamping part and the clamping groove is set in coordination, so that the adjusting bolt can drive the slider to move more stably, and improve the clamping capacity of the chuck. The stability and firmness of clamping.

Description of drawings

Figure 1 is a cross-sectional view of the chuck.

Figure 2 is a side view of the chuck.

Fig. 3 is a state diagram one of the chuck.

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

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

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

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

In the figure, 1. Intermediate body; 2. Adjusting bolt; 21. Clamping part; 22. Head; 23. Rod part; 24. Transition part; 3. Cover plate; 4. Mounting hole; 5. Slider; 51 , the first slider; 52, the second slider; 53, the third slider; 54, the fourth slider; 6, clamping mouth; 7, card slot; 8, threaded hole; 9, through hole; Clip strip; 11, embedding groove; 12, plane; 13, fixing hole; 14, fastener.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the chuck includes an intermediate body 1, an adjusting bolt 2, a pair of cover plates 3 and a slider 5. In this embodiment, there are four through fixing holes 13 in the intermediate body 1. In actual production, there may be six through fixing holes 13 in the intermediate body 1. Fasteners 14 such as bolts pass through the cover plate 3 and The cover plate 3 is fixedly connected to the intermediate body 1 through the fixing hole 13, and a pair of cover plates 3 are respectively fixedly connected to both sides of the intermediate body 1. The cover plate 3 has a through hole 9, and the through hole 9 is In this embodiment, the thickness of the cover plate 3 is 1.5 cm. In actual production, the thickness of the cover plate 3 can be 1 cm or 2 cm.

In this embodiment, the intermediate body 1 has a penetrating installation hole 4 in the shape of a regular quadrilateral, and four sliders 5 are provided in the installation hole 4, which are respectively a first slider 51, a second slider 52, and a third slider. 53 and the fourth slider 54, the first slider 51, the second slider 52, the third slider 53 and the fourth slider 54 are arranged counterclockwise, the first slider 51, the second slider 52, the The cross-sections of the three slide blocks 53 and the fourth slide block 54 are right-angled quadrilaterals, and the right-angle sides of the first slide block 51, the second slide block 52, the third slide block 53 and the fourth slide block 54 can be attached to the installation On the two adjacent side walls corresponding to the hole 4, one side of the slider 5 is attached to the side wall of the corresponding installation hole 4. The number of the slider 5 is the same as the number of the side walls of the installation hole 4. In actual production Among them, the cross section of the mounting hole 4 can be in the shape of a regular triangle or a regular hexagon, and the mounting hole 4 can be provided with three sliders 5 or six sliders 5 . Slide block 5 all has the inclined-plane that obliquely arranges, and the inclined-plane of adjacent two sliding blocks 5 fits, and promptly the inclined-plane of first sliding block 51 and the inclined-plane of second sliding block 52 fit, and the inclined-plane of second sliding block 52 The inclined surface of the third slider 53 is attached to the inclined surface of the third slider 53, the inclined surface of the third slider 53 is attached to the inclined surface of the fourth slider 54, and the inclined surface of the fourth slider 54 is attached to the inclined surface of the first slider 51 Together, the first slider 51, the second slider 52, the third slider 53 and the fourth slider 54 enclose a square clamping opening 6. The clamping port 6 and the through hole 9 are arranged coaxially, and the diameter of the through hole 9 is larger than the inner diameter of the clamping port 6 .

There is a threaded hole 8 in the intermediate body 1, and the threaded hole 8 communicates with the mounting hole 4, and the adjusting bolt 2 is passed through the threaded hole 8. There is a plane 12 on the outer wall of the intermediate body 1, and the plane 12 and the head of the adjusting bolt 2 22 matches. As shown in Figure 5, the adjusting bolt 2 includes a head 22, a rod 23, a transition part 24 and a clamping part 21, the head 22 is connected with the clamping part 21 through the rod 23, the transition 24, the head 22, the rod The part 23, the transition part 24 and the clamping part 21 are an integral structure, the outer wall of the rod part 23 has an external thread, the outer wall of the transition part 24 is smooth, and the clamping part 21 protrudes outward along the radial direction of the adjusting bolt 2, Along the radial direction of the rod portion 23, the outer diameter of the engaging portion 21 is larger than the outer diameter of the transition portion 24, the outer diameter of the engaging portion 21 is smaller than the major diameter of the external thread, and the end of the engaging portion 21 away from the transition portion 24 is hemispherical. , In this embodiment, the head 22 is an inner hexagonal structure, but in actual production, the head 22 may be an outer hexagonal structure.

As shown in Figure 6, the first slider 51 has a card slot 7, the card slot 7 is located at the end of the first slider 51 close to the adjustment bolt 2, the card slot 7 runs through the first slider 51, and the top of the inner wall of the card slot 7 It has a pair of inwardly protruding clip strips 10, the bottom of the clip slot 7 is arc-shaped, and the clip joint part 21 is embedded in the clip slot 7, and the clip joint part 21 can lean against the clip bar 10. The outer wall is in clearance fit with the inner wall of the slot 7 . As shown in FIG. 7 , an end of the second slider 52 close to the adjusting bolt 2 has an embedding groove 11 , and part of the adjusting bolt 2 can be embedded in the embedding groove 11 .

When assembling, first rotate the adjusting nut so that the adjusting nut is passed through the threaded hole 8, the transition part 24 and the clamping part 21 of the adjusting nut are located in the mounting hole 4, and then the first slider 51 is placed in the mounting hole 4 , and the first slider 51 is located at the left end of the adjusting nut, the slot 7 is facing the transition part 24 and the snap-in part 21, and the first slider 51 is moved in parallel so that the snap-in part 21 extends into the slot 7. When the clamping part 21 is clamped with the clamping bar 10, the first slider 51 and the adjusting bolt 2 are clamped together, and the first slider 51 is continued to move in parallel until a right-angled side of the first slider 51 abuts against the installation On the side wall of the hole 4, install the counterclockwise order, put the second slider 52, the third slider 53 and the second slider 52 in sequence, and then connect the cover plate 3 and the intermediate body through the fastener 14 1 phase solid connection.

When fixing the tap, first turn the adjusting bolt 2 counterclockwise, the adjusting bolt 2 pulls the first slider 51 to move upward, the first slider 51 pushes the second slider 52 to move to the left, the second slider 52 pushes the third slider 53 Moving down, the third slider 53 pushes the fourth slide to move to the right, so that the clamping opening 6 is opened and enlarged, and the tail end of the tap is inserted into the clamping opening 6, and then the adjusting bolt 2 is rotated clockwise to adjust The bolt 2 pushes the first slider 51 to move downward, the first slider 51 pushes the fourth slider 54 to move to the left, the fourth slider 54 pushes the third slider 53 to move upward, and the third slider 53 pushes the second slider Moving to the right, part of the adjusting bolt 2 is inserted into the embedding groove 11 until the first slide block 51 , the second slide block 52 , the third slide block 53 and the fourth slide block 54 clamp the tap, and then use the tap for tapping.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although the intermediate body 1, adjusting bolt 2, clamping part 21, head 22, rod part 23, transition part 24, cover plate 3, mounting hole 4, slider 5, first slider 51, The second slider 52, the third slider 53, the fourth slider 54, the clamping opening 6, the slot 7, the threaded hole 8, the through hole 9, the clip 10, the insertion groove 11, the plane 12, the fixing hole 13, Fastener 14 and other terms, but does not exclude the possibility of using other terms. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (10)

1. A collet, comprising an intermediate body (1), is characterized in that it also includes an adjusting bolt (2) and a pair of cover plates (3), and the intermediate body (1) has a penetrating and polygonal installation hole (4), the mounting hole (4) is provided with several sliders (5), a clamping mouth (6) is formed between several sliders (5), the slider (5) One side leans against the side wall of the corresponding mounting hole (4), and the sliders (5) all have slopes arranged obliquely, and the slopes of two adjacent sliders (5) fit together, and several One of the sliders (5) in the sliders (5) is marked as the first slider (51), and the first slider (51) has a draw-in groove (7), and the intermediate body (1) also has There is a threaded hole (8), the threaded hole (8) communicates with the mounting hole (4), the adjusting bolt (2) is passed through the threaded hole (8), and the inner end of the adjusting bolt (2) There is a clamping part (21) protruding radially outward along the adjusting bolt (2), and the clamping part (21) is located in the clamping groove (7) so that the adjusting bolt (2) and the first slider ( 51) are snapped together, and a pair of the cover plates (3) are fixedly connected to both sides of the intermediate body (1) respectively, and the through holes (9) are provided in the cover plates (3), and the through holes ( 9) Corresponding to the clamping port (6). 2. A collet according to claim 1, characterized in that the clamping groove (7) is located at the end of the first slider (51) close to the adjusting bolt (2), and the clamping groove (7) runs through The first slider (51), the top of the inner wall of the slot (7) has a pair of inwardly protruding clamping strips (10), and the clamping part (21) can abut against the clamping strips (10) Make the adjustment bolt (2) and the first slide block (51) engage with each other. 3. A kind of chuck according to claim 1, characterized in that, another slide block (5) in several slide blocks (5) is marked as a second slide block (52), and the second slide block (52) There is an embedding groove (11) near one end of the adjusting bolt (2), and part of the adjusting bolt (2) can be embedded in the embedding groove (11). 4. A chuck according to claim 1, 2 or 3, characterized in that, the adjusting bolt (2) further comprises a head (22), a rod (23) and a transition portion (24), the The head portion (22) is connected to the clamping portion (21) through the rod portion (23) and the transition portion (24), and the head portion (22), the rod portion (23), the transition portion (24) and the clamping portion (21) Integral structure, the outer wall of the rod portion (23) has an external thread, the outer wall of the transition portion (24) is smooth, and along the radial direction of the rod portion (23), the clamping portion The outer diameter of (21) is larger than the outer diameter of the transition part (24), and the outer diameter of the clamping part (21) is smaller than the major diameter of the external thread. 5. A collet according to claim 4, characterized in that, the end of the clamping part (21) away from the transition part (24) is hemispherical, and the bottom of the clamping groove (7) is arc-shaped , when the engaging portion (21) is located in the engaging groove (7), the outer sidewall of the engaging portion (21) is in clearance fit with the inner sidewall of the engaging groove (7). 6. A chuck according to claim 4, characterized in that, there is a plane (12) on the outer wall of the intermediate body (1), and the plane (12) is aligned with the head of the adjusting bolt (2) (22) matches. 7. A chuck according to claim 1, 2 or 3, characterized in that the through hole (9) is circular, and the diameter of the through hole (9) is larger than that of the clamping port (6). the inside diameter of. 8. A chuck according to claim 1, 2 or 3, characterized in that the thickness of the cover plate (3) is 1-2 cm. 9. A chuck according to claim 1, 2 or 3, characterized in that, the intermediate body (1) has several fixed holes (13) through which the fasteners (14) pass through The cover plate (3) is passed through the fixing hole (13) so that the cover plate (3) is fixedly connected with the intermediate body (1). 10. A kind of collet according to claim 1 or 2 or 3, is characterized in that, the quantity of described slide block (5) is four, is respectively the first slide block (51), the second slide block ( 52), the third slider (53) and the fourth slider (54), the cross section of the mounting hole (4) is square, the first slider (51), the second slider (52), The cross-sections of the 3rd slide block (53) and the 4th slide block (54) are right-angled quadrilateral, and described first slide block (51), the 2nd slide block (52), the 3rd slide block (53) and the 4th slide block (53) The right-angled sides of the four slide blocks (54) can be attached to the corresponding adjacent two side walls of the mounting hole (4), and the first slide block (51), the second slide block (52), the third slide block The clamping opening (6) enclosed between the slider (53) and the fourth slider (54) is square.