CN201220287Y

CN201220287Y - Pneumatic chuck

Info

Publication number: CN201220287Y
Application number: CNU200820032339XU
Authority: CN
Inventors: 顾学华
Original assignee: Mou Yanfeng
Current assignee: Changzhou Beut Machinery Manufacture Co., Ltd.
Priority date: 2008-02-28
Filing date: 2008-02-28
Publication date: 2009-04-15
Anticipated expiration: 2018-02-28

Abstract

The utility model discloses a pneumatic chuck mainly used for a lathe, which comprises a shell, a piston, a piston rod and a clamping jaw, wherein the piston is arranged in the shell, the piston is fixedly connected with the piston rod, a first cavity chamber is formed between the rear part of the piston and the shell, a second cavity chamber is formed between the front part of the piston and the cover plate of the casing, an opening is arranged on the cover plate, the piston rod penetrates the opening to be matched with the opening in a sliding way, the outer end of the piston rod is connected with the clamping jaw, a bushing is fixed on the shell or the cover plate, a sliding chute with a conical surface is arranged on the bushing, and the back of the clamping jaw is matched with the clamping jaw in a sliding way. The utility model has the advantages that the clamping range is wider, the versatility is high, and the operation for replacing the clamping jaw is convenient, and the utility model also has the advantages of large clamping force, high clamping precision, security and reliability.

Description

Pneumatic chuck

Technical field

The utility model relates to a kind of lathe pneumatic chuck.

Background technology

Existing air spider exists the clamping range of jaw less and change the cumbersome shortcoming of jaw operation.For example the applicant's application number is 200720033188.5, the application of air spider by name discloses a kind of air spider of similar structures, its claw and the load of power voussoir, and the jaw moving range is less, and versatility is not high; When changing jaw, need be from dismounting one by one on the power voussoir, then load onto and adjust the position, tighten jaw again, operate cumbersome.

Summary of the invention

The purpose of this utility model is to provide a kind of clamping range bigger, changes jaw pneumatic chuck easily.

In order to achieve the above object, the technical solution of the utility model is: a kind of pneumatic chuck, comprise shell, piston, piston rod and jaw, piston is cased, piston is fixedlyed connected with piston rod, form first chamber between piston rear portion and the shell, form second chamber between piston front portion and the cover plate, has perforate on the cover plate, piston rod passes perforate and is slidingly matched with perforate, and piston rod outer end and jaw load are fixed with ring set on shell or the cover plate, have the chute of the band conical surface on the ring set, jaw back and chute are slidingly matched.

After adopting said structure, move back and forth along the conical surface chute of ring set because piston rod directly drives jaw, the jaw moving range is wide, so clamping range is bigger, and the versatility height; When changing jaw, can dismantle whole jaws from piston rod is last, and then load onto whole jaws, need not to adjust one by one and tighten, operation easily.In addition, the utility model have also that clamping force is big, clamping precision height, safe and reliable characteristics.

Description of drawings

The embodiment that provides below in conjunction with accompanying drawing is described in further detail the utility model.

Fig. 1 is the Facad structure schematic diagram of pneumatic chuck of the present utility model;

Fig. 2 is the cutaway view of Fig. 1 along the A-A line, also is the state diagram of the utility model when jaw unclamps;

Fig. 3 is the state diagram of the utility model when jaw clamps;

Fig. 4 is the structural representation of the jaw in the utility model;

Fig. 5 is the vertical view of Fig. 4;

Fig. 6 is the left view of Fig. 4;

Fig. 7 is the structural representation of the pulling block in the utility model;

Fig. 8 is the left view of Fig. 7;

Fig. 9 is the structural representation of the ring set in the utility model, also is the cutaway view of Figure 11 along the B-B line;

Figure 10 is the vertical view of Fig. 9;

Figure 11 is the right view of Fig. 9;

Figure 12 is the structure of cover plate schematic diagram in the utility model, also is the cutaway view of Figure 13 along the C-C line;

Figure 13 is the left view of Figure 12.

The specific embodiment

As Fig. 1,2,3,12, shown in 13, pneumatic chuck of the present utility model, comprise shell 1, piston 2, piston rod 4 and jaw 8, piston 2 is contained in the shell 1, piston 2 is fixedlyed connected with piston rod 4, form first chamber 12 between piston 2 rear portions and the shell 1, form second chamber 11 between piston 2 front portions and the cover plate 10, has perforate 10-1 on the cover plate 10, piston rod 4 passes perforate 10-1 and is slidingly matched with perforate 10-1, and piston rod 4 outer ends and jaw 8 loads are fixed with ring set 5 on shell 1 or the cover plate 10, have the chute 5-2 of the band conical surface on the ring set 5, jaw 8 backs and chute 5-2 are slidingly matched.

Shown in Fig. 2,3,4,7,8, jaw 8 has draw-in groove 8-1, and the pulling block 9 that has been threaded on the piston rod 4 has retaining platform 9-1 on the pulling block 9, and retaining platform 9-1 injects the draw-in groove 8-1 of jaw 8.

Shown in Fig. 7,8,4, for the ease of loading and unloading jaw 8 and preventing that pulling block 9 is loosening, pulling block 9 has some retaining platform 9-1 and along circumferentially interrupted distribution, each retaining platform 9-1 is corresponding with the draw-in groove 8-1 of each jaw 8 respectively, also is provided with on the pulling block 9 holding screw 15 is housed in radial hole and the radial hole.

Shown in Fig. 2,3,9,10,5,6, for the chute 5-2 that guarantees jaw 8 and the band conical surface of ring set 5 is close to mobile, to guarantee the clamping precision, has bar hole 5-3 on the ring set 5, bar hole 5-3 and chute (5-2) connect, the screw 7 that is equipped with spring 6 inserts bar hole 5-3 and is threaded with the screwed hole 8-2 at jaw 8 backs, and spring 6 two ends offset by packing ring 16 and the head of screw 7 and heavy shoulder or the outer face of bar hole 5-3 respectively.

Shown in Fig. 2,3,9,10, hinder jaw 8 motions in order to prevent smear metal, have chip-removal hole 5-1 on the ring set 5, chip-removal hole 5-1 is positioned at chute 5-2 afterbody, and connects with ring set 5 outsides and chute 5-2.

Shown in Fig. 9,11, have three flange hole 5-4 on the ring set 5, flange hole 5-4 is a long arc-shaped holes.Like this, when needs dismountings jaw 8, referring to 1,2,3, shown in, can unscrew and back out several screws 14, rotate the certain angle of ring set 5 then, make the draw-in groove 8-1 of each jaw 8 break away from retaining platform 9-1 restriction on the pulling block 9, can once unload whole jaws 8, operate more convenient like this.Certainly, flange hole 5-4 also can change 3～6 screw holes into, will back out whole screws 14 when only dismantling, and relatively takes a lot of trouble some.

Shown in Fig. 2,3,12,13, in order to prevent piston 2 from use rotating jaw 8 is come off, stop pin 3 is housed on the piston 2, has corresponding spacing hole 10-3 or stopper slot on the cover plate 10, spacing hole 10-3 or stopper slot that stop pin 3 inserts on the cover plate 10.

Shown in Fig. 2,3, more stable for piston rod 4 is moved, be fixedly connected with locating shaft 13 on the shell 1, piston rod 4 has axially extending bore 4-1, and locating shaft 13 passes the axially extending bore 4-1 of piston rod 4 and cooperates with axially extending bore 4-1 slipper seal.

Shown in Fig. 2,3, for when processing longer bar, bar can pass through cylinder, thereby finishes self-feeding, and locating shaft 13 has axially extending bore 13-1.If do not add section chief's bar, then locating shaft 13 can be made solid.

Shown in Fig. 2,3, shell 1 rear portion is provided with the first air flue 1-1 and the second air flue 2-2, and the first air flue 1-1 leads to first chamber, 12, the second air flue 2-2 and leads to second chamber 11 through the air flue 10-2 of cover plate 10.The first air flue 1-1 and the second air flue 2-2 also can be located on the locating shaft 13.

Shown in Fig. 2,3, when the utility model uses, when the first air flue 1-1 of shell 1 is in the air inlet state, gas enters first chamber 12, promoting piston 2 and piston rod 4 moves right, make piston rod 4 promote jaw 8 by pulling block 9 and move right, jaw 8 moves right along the chute 5-2 of the band conical surface of ring set 5, thereby unclamps workpiece; When the second air flue 1-2 of shell 1 is in the air inlet state, gas enters second chamber 11, promotes piston 2 and piston rod 4 to left movement, makes piston rod 4 spur jaws 8 to left movement by pulling block 9, jaw 8 is moved to the left along the chute 5-2 of the band conical surface of ring set 5, thus clamping work pieces.

Claims

1, a kind of pneumatic chuck, comprise shell (1), piston (2), piston rod (4) and jaw (8), piston (2) is contained in the shell (1), piston (2) is fixedlyed connected with piston rod (4), form first chamber (12) between piston (2) rear portion and the shell (1), form second chamber (11) between piston (2) front portion and the cover plate (10), it is characterized in that:

Have perforate (10-1) on a, the cover plate (10), piston rod (4) passes perforate (10-1) and is slidingly matched with perforate (10-1),

B, piston rod (4) outer end and jaw (8) load,

Be fixed with ring set (5) on c, shell (1) or the cover plate (10), have the chute (5-2) of the band conical surface on the ring set (5),

D, jaw (8) back and chute (5-2) are slidingly matched.

2, pneumatic chuck according to claim 1 is characterized in that: jaw (8) has draw-in groove (8-1), and the pulling block (9) that has been threaded on the piston rod (4) has retaining platform (9-1) on the pulling block (9), and retaining platform (9-1) injects the draw-in groove (8-1) of jaw (8).

3, pneumatic chuck according to claim 2, it is characterized in that: pulling block (9) has some retaining platforms (9-1) and intermittently distributes along circumferential, each retaining platform (9-1) is corresponding with the draw-in groove (8-1) of each jaw (8) respectively, also is provided with on the pulling block (9) holding screw (15) is housed in radial hole and the radial hole.

4, pneumatic chuck according to claim 1, it is characterized in that: have bar hole (5-3) on the ring set (5), bar hole (5-3) connects with chute (5-2), the screw (7) that is equipped with spring (6) inserts bar hole (5-3) and is threaded with the screwed hole (8-2) at jaw (8) back, and spring (6) two ends offset by the head of packing ring (16) and screw (7) and the heavy shoulder or the outer face of bar hole (5-3) respectively.

5, pneumatic chuck according to claim 1 is characterized in that: have chip-removal hole (5-1) on the ring set (5), chip-removal hole (5-1) is positioned at chute (5-2) afterbody, and connects with ring set (5) outside and chute (5-2).

6, pneumatic chuck according to claim 1 is characterized in that: have three flange holes (5-4) on the ring set (5), flange hole (5-4) is a long arc-shaped holes.

7, pneumatic chuck according to claim 1, it is characterized in that: stop pin (3) is housed on the piston (2), have corresponding spacing hole (10-3) or stopper slot on the cover plate (10), stop pin (3) inserts spacing hole (10-3) or the stopper slot on the cover plate (10).

8, according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described pneumatic chucks, it is characterized in that: be fixedly connected with locating shaft (13) on the shell (1), piston rod (4) has axially extending bore (4-1), and locating shaft (13) passes the axially extending bore (4-1) of piston rod (4) and cooperates with axially extending bore (4-1) slipper seal.

9, pneumatic chuck according to claim 8 is characterized in that: locating shaft (13) has axially extending bore (13-1).

10, pneumatic chuck according to claim 1, it is characterized in that: shell (1) rear portion is provided with first air flue (1-1) and second air flue (2-2), first air flue (1-1) leads to first chamber (12), and second air flue (2-2) leads to second chamber (11) through the air flue (10-2) of cover plate (10).