CN201760603U - Workholding and withdrawal structure of lathe - Google Patents

Abstract

The utility model provides a work piece centre gripping and exit structure of lathe, include: the device comprises a sliding sleeve, a clamping assembly and a material returning assembly; the sliding sleeve is arranged in the lathe in a front-back sliding manner and is internally provided with an accommodating hole, and a tapered hole is formed at the front end of the accommodating hole; the clamping assembly is accommodated in the sliding sleeve, more than two elastic clamping jaws extend out of the front end of the clamping assembly, and the outer surface of each elastic clamping jaw is provided with a conical part matched with the conical hole; the material returning assembly is accommodated in the clamping assembly and comprises a sleeve, a push rod protruding out of the sleeve and a spring elastically pushing the push rod; when the sliding sleeve slides towards the clamping assembly and the tapered hole is tightly pressed against the tapered part, the elastic clamping jaw can clamp a workpiece; when the sliding sleeve is far away from the clamping assembly, the elastic clamping jaw loosens the workpiece, and the spring drives the push rod to push the workpiece out of the workpiece clamping hole by the elasticity of the spring; borrow this, can carry out the centre gripping of work piece fast simply and withdraw from, need not bare-handed work piece of taking out, borrow this protection operating personnel's safety and improve production rate.

Description

Workholding and withdrawal structure of lathe

technical field

The utility model relates to a lathe, in particular to a workpiece clamping and withdrawing structure of the lathe.

Background technique

A lathe is a commonly used mechanical processing tool, which mainly includes a slide seat, and a chuck is provided at one end of the slide rail of the slide seat; the chuck is composed of a plurality of elastic jaws, and is clamped by these elastic jaws For the workpiece, multiple tool holders are installed on the front side of the chuck, and each tool holder is equipped with different tools to cut the workpiece into the desired shape and size.

During the operation of the lathe, the operator puts the workpiece into the chuck with bare hands and clamps it for cutting every time, and must loosen the chuck with bare hands to take out the workpiece after cutting, which is quite troublesome and affects the production rate; moreover, the surrounding of the chuck With the tool installed, if the operator loosens the chuck and takes out the workpiece by hand, he may be accidentally cut by the tool; if the workpiece can exit the chuck after cutting, it will increase the safety of the entire lathe operation.

Therefore, how to solve the above problems becomes the improved goal of the present invention.

Utility model content

In view of this, the main purpose of the present utility model is to provide a workpiece clamping and withdrawing structure of a lathe, which can clamp and withdraw workpieces with fast and simple operations, thereby protecting the safety of operators and increasing production rate.

In order to achieve the above purpose, the utility model provides a workpiece clamping and withdrawal structure of a lathe, which comprises:

a sliding sleeve, which can be slid back and forth in the lathe, and has an accommodation hole in the sliding sleeve, and a tapered hole is formed at the front end of the accommodation hole;

The clamping assembly is accommodated in the sliding sleeve. More than two elastic jaws extend from the front end of the clamping assembly. The outer surfaces of these elastic jaws form a tapered portion that cooperates with the tapered hole, and these elastic The jaws surround a workpiece clamping hole, the rear end of the clamping assembly has a container, and a perforation is opened between the container and the workpiece clamping hole;

The ejection assembly includes a sleeve fixed in the container, a push rod accommodated in the sleeve and protruding from the workpiece holding hole, and a spring elastically abutting against the push rod;

Wherein when the sliding sleeve slides toward the clamping assembly and makes the tapered hole press against the tapered part, the elastic jaw can clamp the workpiece; when the sliding sleeve is away from the clamping assembly, the elastic clamp The claw releases the workpiece, and the spring drives the push rod with its elastic force to push the workpiece out of the workpiece clamping hole.

Compared with the prior art, the utility model has the following effects:

According to the utility model, as long as the operator slides the sliding sleeve towards the clamping assembly and presses the tapered hole against the tapered part, the elastic jaws can clamp the workpiece; The sleeve is far away from the clamping assembly and the elastic jaws release the workpiece, and the spring in the ejection assembly will drive the push rod to push the workpiece out of the workpiece clamping hole; therefore, the operation is relatively stable during the clamping and withdrawal of the workpiece. It is simple and fast, and will not affect the production rate of the lathe; moreover, since the workpiece will be pushed out of the workpiece clamping hole by the push rod, the operator does not need to take out the workpiece with bare hands, which can protect the operator from being cut by the tool.

Description of drawings

Fig. 1 is the three-dimensional exploded view of structure of the present utility model;

Fig. 2 is the schematic diagram that the structure of the present utility model is used together with feeding box and tailstock;

Fig. 3 is a configuration diagram of the structure of the utility model and the feeding box;

Fig. 4 is the three-dimensional exploded view of the feeding box used together with the structure of the utility model;

Fig. 5 is a perspective view of a feed box with a workpiece inside used with the structure of the present invention;

Fig. 6 is a schematic diagram of the operation section of the structure of the utility model, which shows the situation that the tailstock is about to approach the clamping assembly;

Fig. 7 is the schematic diagram of the operation section of the structure of the utility model, which shows the situation that the tailstock has pushed the workpiece in the feeding box into the clamping assembly;

Fig. 8 is a schematic diagram of the operation section of the structure of the utility model, which shows the situation that the tailstock and the feeding box are respectively away from the clamping assembly and the workpiece is ready to be cut;

Fig. 9 is a schematic diagram of the operation section of the structure of the present invention, which shows the situation that the push rod of the ejection assembly has pushed the workpiece out of the clamping assembly.

Explanation of reference signs

1 The workpiece clamping and exit structure of the lathe 10 Sliding sleeve

11 Accommodating hole 12 Tapered hole

20 clamping components 21 elastic clamping jaws

211 Tapered part 22 Workholding hole

23 slots 231 perforations

24 cap 30 return components

31 sleeve 311 internal thread

32 putter 321 rod body

322 block 33 spring

34 cock parts 341 external thread

342 buried hole 343 perforated

100 lathes 200 feeding boxes

210 feed inlet 220 guide chute

230 holding hook 240 installation part

241 screw holes 250 sliding door

251 Convex Rib 260 Track

270 Jack 280 Auxiliary Hook

281 screw 300 tailstock

310 Ejector 400 Tool Rack

410 cutters 500 screws

W workpiece

Detailed ways

The technical content and detailed description of the present utility model will be described as follows with the accompanying drawings, but the attached drawings are only for illustration, and are not intended to limit the present utility model.

Please refer to Fig. 1 to Fig. 5, the utility model provides a workpiece clamping and withdrawing structure 1 of a lathe (hereinafter referred to as "structure 1"), as shown in Fig. 2, the structure 1 is installed in a lathe 100 and The magazine 200 and the tailstock 300 are used together, the workpiece W is accommodated in the feed magazine 200 (as shown in Figure 5), and the ejector rod 310 at the front end of the tailstock 300 pushes the workpiece W in the feed magazine 200 into the utility model. within structure 1. In addition, a plurality of tool holders 400 in different orientations are arranged around the front side of the structure 1 of the present invention, and a tool 410 is fixed on each tool holder 400 for cutting the workpiece W.

As shown in FIG. 1 , the structure 1 of the present invention mainly includes: a sliding sleeve 10 , a clamping assembly 20 , and a stripping assembly 30 .

Because the structure of tailstock 300 is not the technical characterictic of the present utility model, so omit its explanation so as not to repeat; Here, only first illustrate the structure of feeding box 200, as shown in Figure 2 and Figure 3, by support (as shown in Figure 2 dotted line As shown), the feeding box 200 is installed on the front side of the clamping assembly 20 between the lathe 100 and the tailstock 300 .

4 and 5, the feeding box 200 is roughly rectangular and hollow and is provided with a feeding port 210. The feeding port 210 is connected to the guide chute 220. The bottom of the feeding box 200 has a holding hook 230 to hold the workpiece W and make it The workpiece W is aligned with the center of the clamping assembly 20 (as shown in FIG. 6 ). One side of the feeding box 200 is formed with a mounting part 240, and the mounting part 240 is provided with a screw hole 241, and the screw 500 (as shown in Figure 3) passes through the screw hole 241 and is locked in the bracket, so that the feeding The box 200 is locked on the bracket.

A sliding door 250 is provided between the feed port 210 and the guide chute 220 to selectively open or close the feed port 210, thereby allowing or prohibiting the workpiece W from entering the feed port 210; Two opposite rails 260 are provided on the walls of the feed box 200 on both sides of the feed port 210, and two convex ribs 251 cooperating with the two rails 260 are formed on both sides of the sliding door 250, thereby The sliding door 250 can slide up and down the feed port 210 to open or close the feed port 210 .

The bottom of the feeding box 200 is provided with an insertion hole 270 adjacent to the wall surface of the holding hook 230. The inner diameter of the insertion hole 270 is approximately equal to the outer diameter of the push rod 310, so that the push rod 310 can be inserted into the insertion hole 270 and push the workpiece W into it. Clamp assembly 20 in the center.

Optionally, an auxiliary hook 280 is installed adjacent to the holding hook 230 at the bottom of the feeding box 200, and the auxiliary hook 280 is locked to the bottom of the feeding box 200 by screws 281 and is closer to the clamping assembly 20 than the holding hook 230 To ensure that the front end of the workpiece W will not sag or deviate left and right before entering the clamping assembly 20, so that the workpiece W can be sent into the clamping assembly 20 more accurately.

Next, referring to FIG. 1 again, the details of each part of the structure 1 of the present invention will be described in detail.

The sliding sleeve 10 is slidably disposed in the lathe 100 (as shown in FIG. 6 ). The sliding sleeve 10 has an accommodating hole 11 , and a tapered hole 12 is formed at the front end of the accommodating hole 11 .

The clamping assembly 20 is accommodated in the sliding sleeve 10, and more than two elastic jaws 21 extend from the front end of the clamping assembly 20, and the outer surfaces of these elastic jaws 21 form a tapered portion 211 that cooperates with the tapered hole 12 , and these elastic jaws 21 surround the workpiece clamping hole 22 , the rear end of the clamping assembly 20 has a cavity 23 , and a through hole 231 is opened between the cavity 23 and the workpiece clamping hole 22 . A cap 24 is screwed to the rear end of the clamping assembly 20 , thereby fixing the stripping assembly 30 in the container 23 .

The ejection assembly 30 includes a sleeve 31 fixed in the container 23, a push rod 32 accommodated in the sleeve 31 and protruding from the workpiece holding hole 22, and a spring 33 elastically against the push rod 32. The sleeve 31 is accommodated between the clamping assembly 20 and the cap 24; in order to make the push rod 32 and the spring 33 more easily installed in the ejection assembly 30, the front end of the sleeve 31 is screwed with a cock 34 for Here, the inner wall of the front end of the sleeve 31 is provided with an internal thread 311, and the outer surface of the cock part 34 has an external thread 341 which is screwed with the internal thread 311, and the cock part 34 is provided with a buried hole 342 at the rear end and a buried hole 342 at the front end. A through hole 343 communicating with the buried hole 342 .

The push rod 32 and the spring 33 are accommodated in the sleeve 31. The push rod 32 has a rod body 321 and a stopper 322 protruding from the rear section of the rod body 321. The outer diameter of the rod body 321 is approximately equal to the inner diameter of the perforation 343 of the cock 34. The outer diameter of the stopper 322 is approximately equal to the inner diameter of the buried hole 342 , so the push rod 32 can slide back and forth in the sleeve 31 , but cannot completely disengage from the sleeve 31 due to the restriction of the stopper 322 .

The block 322 of the push rod 32 is in addition to preventing the push rod 32 from protruding from the sleeve 31 completely, and the rear side of the block 322 is also used for one end of the spring 33 to lean against, while the other end of the spring 33 leans against the sleeve. 31 rear side inner wall.

Referring to Fig. 6 to Fig. 9, the operation process of the structure 1 of the present invention will be described below.

After the workpiece W enters the feeding port 210 of the feeding box 200 from the guide chute 220 as shown in FIG. Workpiece clamping hole 22 and push rod 32; Then, as shown in Figure 6, tailstock 300 moves toward clamping assembly 20 directions (as shown by the rightward arrow in Figure 6), until the ejector rod 310 of tailstock 300 contacts and pushes Squeeze the bottom workpiece W until.

As shown in FIG. 7 , the ejector rod 310 of the tailstock 300 continues to push the workpiece W, and pushes the workpiece W supported by the holding hook 230 into the clamping assembly 20 and contacts the push rod 32 of the stripping assembly 30 . At this time, the push rod 32 is pressed by the workpiece W to retract toward the inside of the sleeve 31 and compress the spring 33 , thereby achieving force balance on both sides of the workpiece W. Referring to FIG. Then, the sliding sleeve 10 slides toward the elastic jaws 21 of the clamping assembly 20 and makes the tapered hole 12 press against the tapered portion 211 , so that the elastic jaws 21 can hold the workpiece W firmly.

As shown in Figure 8, after the workpiece W is firmly clamped, the tailstock 300 and the feeding box 200 are respectively away from the clamping assembly 20; The workpiece W performs cutting work.

As shown in FIG. 9 , after the tool 410 has finished cutting the workpiece W, the sliding sleeve 10 is far away from the clamping assembly 20, and at this time, the elastic jaws 21 are no longer pressed by the tapered hole 12 of the sliding sleeve 10, so The elastic clamping jaws 21 are able to release the workpiece W; afterward, the spring 33 that was originally compressed drives the push rod 32 to push the workpiece W out of the workpiece clamping hole 22 by its own elastic force.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. All equal changes and modifications made according to the content of the utility model are covered within the patent scope of the utility model.

Claims (5)

1. the piece-holder of a lathe and exit structure is characterized in that, this structure comprises:

Sliding sleeve can be arranged in the described lathe slidingly back and forth, has containing hole in this sliding sleeve, and the front end of this containing hole forms bellmouth;

Clamp assemblies, be placed in this sliding sleeve, the front end of this clamp assemblies extends two above elasticity jaws, the outer surface of these elasticity jaws forms the taper portion that cooperatively interacts with this bellmouth, and these elasticity jaws surround the piece-holder hole, the rear end of this clamp assemblies has tank, and offers perforation between this tank and this piece-holder hole;

Material returned assembly comprises the sleeve that is fixed in this tank, is placed in this sleeve and convexedly stretches in push rod this piece-holder hole in, reach the spring of this push rod of resilient abutment;

Wherein this sliding sleeve is when this clamp assemblies slides and makes this taper portion of this bellmouth packing, and this elasticity jaw can the described workpiece of clamping; This sliding sleeve is during away from this clamp assemblies, and this elasticity jaw unclamps described workpiece, and this spring orders about this push rod with its elastic force described workpiece is ejected outside this piece-holder hole.

2. the piece-holder of lathe as claimed in claim 1 and exit structure is characterized in that, the rear end of described clamp assemblies also is bolted with cap, and described sleeve is placed between described clamp assemblies and this cap.

3. the piece-holder of lathe as claimed in claim 2 and exit structure is characterized in that, the front end of described sleeve is bolted with the cock part, the perforation that this cock part is provided with the buried via hole that is positioned at the rear end and is positioned at front end and communicates with this buried via hole.

4. the piece-holder of lathe as claimed in claim 3 and exit structure, it is characterized in that, described push rod has the body of rod and protrudes out block from this body of rod back segment, the external diameter of this body of rod equals the internal diameter of the described perforation of described cock part, and the external diameter of this block equals the internal diameter of the described buried via hole of described cock part.

5. the piece-holder of lathe as claimed in claim 4 and exit structure is characterized in that, the trailing flank of described block for an end of described this spring against, the other end of described spring is against the rear side inwall of this sleeve pipe.

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