CN212420895U - Bar processing clamp - Google Patents
Bar processing clamp Download PDFInfo
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- CN212420895U CN212420895U CN202021295434.6U CN202021295434U CN212420895U CN 212420895 U CN212420895 U CN 212420895U CN 202021295434 U CN202021295434 U CN 202021295434U CN 212420895 U CN212420895 U CN 212420895U
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- pull rod
- piston
- oil
- gap
- chuck
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Abstract
The utility model discloses a bar processing clamp, including hydro-cylinder, main shaft, pull rod, chuck and elastic component, pull rod sliding connection is in the main shaft, the chuck is connected at the pull rod front end, the chuck includes a plurality of claw lamella, the terminal surface is provided with big-end-up's bell mouth before the main shaft, the elastic component front end is connected on the main shaft, and the rear end is connected on the pull rod, the elastic component forces the pull rod to drive the chuck along the axial rearward movement of main shaft to make the claw lamella of chuck move backward axial and do centripetal movement in the bell mouth, the hydro-cylinder includes cylinder body, piston and cylinder cap, the piston separates the cylinder body into mutually independent first oil pocket and second oil pocket, the piston acts on the pull rod, first oil pocket, second oil pocket discharge, the piston promotes the pull rod and overcomes the effort that the elastic component applyed to the pull rod and moves forward, makes the claw lamella of chuck keep away from the bell mouth and do centrifugal movement, the second oil cavity is filled with oil, the first oil cavity is drained with oil, and the piston is separated from the transmission connection with the pull rod. The device has simple structure and convenient use.
Description
Technical Field
The utility model belongs to the technical field of anchor clamps and specifically relates to a bar adds clamping apparatus is related to.
Background
When a tool bit of the tool is ground (for example, a bar is used as a raw material), one end of the bar, which is not the tool bit, needs to be clamped on a chuck, and then grinding is carried out; for some thin bars, the existing three-jaw chuck is not used due to low clamping efficiency; as shown in figure 1, a pull rod 2 is sleeved in a main shaft 1, the front end of the pull rod 2 is connected with a chuck 3 for clamping a bar stock, the chuck 3 is composed of a plurality of claw pieces, a tapered hole with a large front part and a small rear part is arranged on the front end surface of the main shaft 1, when the chuck 3 is pulled by the pull rod 2 to move backwards, the claw pieces move along the tapered hole, and the claw pieces move centripetally and are closed, so that the bar stock is clamped tightly.
The pull rod 2 reciprocates along the axial direction of the main shaft 1, and the pull rod is driven by an oil cylinder 9 in the prior art; however, the pull rod rotates synchronously along with the main shaft, and in order to ensure the stability of the rotation of the pull rod, the rear end of the pull rod 2 is provided with a bearing 91 to ensure that the rotation of the pull rod 2 does not generate radial run-out and the like; however, the pull rod 2 needs to move axially at the same time, so that the bearing 91 at the rear end of the pull rod 2 needs to bear axial force while rotating, the service life of the bearing 91 is rapidly reduced, the bearing needs to be replaced periodically, the use cost is increased, and the production efficiency is reduced.
Disclosure of Invention
In view of this, it is necessary to provide a bar processing clamp with simple structure and convenient use.
In order to solve the technical problem, the technical scheme of the utility model is that: a bar processing clamp comprises an oil cylinder, a main shaft, a pull rod, a chuck and an elastic piece, wherein the pull rod is connected in the main shaft in a sliding manner, the chuck is connected at the front end of the pull rod and comprises a plurality of claw pieces, a front big-end-back-small tapered hole is formed in the front end surface of the main shaft, the front end of the elastic piece is connected to the main shaft, the rear end of the elastic piece is connected to the pull rod, the elastic piece forces the pull rod to drive the chuck to move backwards along the axial direction of the main shaft so that the claw pieces of the chuck move backwards and centripetally in the tapered hole, the oil cylinder comprises a cylinder body, a piston and a cylinder cover, the piston separates the cylinder body into a first oil cavity and a second oil cavity which are mutually independent, the piston acts on the pull rod, the first oil cavity is filled with oil, the second oil cavity is filled with oil, the piston pushes the pull rod to overcome the acting force applied by the, the second oil cavity is filled with oil, the first oil cavity is drained with oil, and the piston is separated from the transmission connection with the pull rod.
Furthermore, a fixed sleeve is fixed on the pull rod, and the rear end of the elastic piece acts on the fixed sleeve.
Furthermore, a shaft fixing seat is fixed at the rear end of the main shaft, and the front end of the elastic piece acts on the shaft fixing seat.
Further, the axle is decided the seat rear end and is provided with an annular space that is used for holding the elastic component, the axle is decided the seat rear end and is provided with the packing ring that seals the elastic component in this annular space, the cover is equipped with a adapter sleeve on the pull rod between packing ring and the fixed cover, the adapter sleeve has the first end that the top supported on the packing ring, the top supports the second end at fixed cover rear end and is used for the third end of being connected with piston transmission.
Furthermore, the rear end of the shaft fixing seat is in threaded connection with a nut for preventing the gasket from being separated, and the first end of the connecting sleeve penetrates through the nut to act on the gasket.
Furthermore, the piston is provided with a fourth end which is in transmission connection with a third end of the connecting sleeve, when the second end of the connecting sleeve abuts against the fixed sleeve, a first gap is reserved between the third end of the connecting sleeve and the front end of the fixed sleeve, a second gap is reserved between the third end and the fourth end, and the second gap is larger than the first gap.
Furthermore, an annular convex shoulder is arranged on the cylinder cover, the piston is provided with a fifth end used for being in contact with the convex shoulder, a third gap is reserved between the convex shoulder and the fifth end, and the third gap is larger than the total width of the first gap and the second gap.
Furthermore, an adjusting gasket for adjusting the width of the third gap is arranged on the shoulder.
Further, the elastic piece is a disc spring.
Further, the fixing sleeve is fastened on the pull rod through a screw.
Further, the shaft fixing seat is fastened on the main shaft through a screw.
Compared with the prior art, the utility model discloses following beneficial effect has: the device realizes the rotation and axial movement of the pull rod without the bearing through the matching of the disc spring and the oil cylinder, overcomes the defect that the bearing is easy to damage in the past, and has simple structure and convenient use.
In order to make the aforementioned and other objects, features and advantages of the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic structural diagram of a conventional apparatus.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
In the figure: 1-main shaft, 2-pull rod, 3-chuck, 4-shaft fixed seat, 41-gasket, 42-nut, 43-screw, 5-belleville spring, 6-connecting sleeve, 61-third end, 7-fixing sleeve, 8-oil cylinder, 81-cylinder body, 82-piston, 83-cylinder cover, 84-first oil chamber, 85-second oil chamber, 86-adjusting gasket, 87-fifth end, 88-fourth end, 9-original oil cylinder and 91-bearing.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 2, a bar processing fixture comprises an oil cylinder 8, a main shaft 1, a pull rod 2, a chuck 3, a shaft fixing seat 4, a belleville spring 5, a connecting sleeve 6 and a fixing sleeve 7.
The pull rod 2 is connected in the main shaft 1 in a sliding mode, the chuck 3 is connected at the front end of the pull rod 2, the chuck 3 comprises a plurality of claw flaps, and the front end face of the main shaft 1 is provided with a tapered hole which is large in front and small in back and matched with the claw flaps.
The cylinder 8 includes a cylinder block 81, a piston 82, and a cylinder head 83, the piston 82 partitioning the cylinder block into a first oil chamber 84 and a second oil chamber 85 which are independent of each other, and the cylinder block 81 is provided with a first oil filling hole for filling the first oil chamber 84 and a second oil filling hole for filling the second oil chamber 85.
The shaft fixing seat 4 is fastened at the rear end of the main shaft 1 through a screw 43, the rear end of the shaft fixing seat 4 is provided with an annular space for accommodating the disc spring 5, and the rear end of the shaft fixing seat 4 is provided with a gasket 41 for sealing the disc spring 5 in the annular space; the rear end of the shaft fixing seat 4 is screwed with a nut 42 for preventing the gasket from being separated.
The fixed sleeve 7 is fastened on the pull rod 2 through a screw, the connecting sleeve 6 is sleeved on the pull rod 2 between the gasket 41 and the fixed sleeve 7, and the connecting sleeve 6 is provided with a first end abutting against the gasket, a second end abutting against the fixed sleeve and a third end 61 for being in transmission connection with the piston.
The piston 82 is provided with a fourth end 88 which is in transmission connection with the third end 61 of the connecting sleeve, when the second end of the connecting sleeve 6 is propped against the fixing sleeve 7, a first gap is reserved between the third end 61 of the connecting sleeve and the front end of the fixing sleeve, the distance of the first gap is 0.3mm, a second gap is reserved between the third end 61 and the fourth end 88, and the distance of the second gap is 2.1 mm. When the piston moves forwards, the piston contacts the third end firstly, so that the connecting sleeve pushes the disc spring to compress firstly; when the third end of the connecting sleeve is flush with the front end of the fixing sleeve, the piston pushes the pull rod to move forwards through the fixing sleeve, so that the chuck is opened.
The cylinder head 83 is provided with an annular shoulder and the piston has a fifth end 87 for contact with the shoulder, a third gap being left between the shoulder and the fifth end 87, the distance of the fifth gap being 5 mm.
In this embodiment, an adjusting shim 86 for adjusting the width of the third gap is disposed on the shoulder, and the thickness of the adjusting shim 86 is 2 mm. The moving stroke of the piston can be adjusted according to different use requirements, and then the moving stroke of the pull rod is adjusted.
In this embodiment, the washer 41 comprises a sleeve for sleeving the pull rod and an annular sealing plate for sealing the disc spring 5, the nut 42 has an external thread for screwing with the axial seat, the nut 42 abuts against the sealing plate, and the first end of the connecting sleeve 6 passes through the middle of the nut and abuts against the rear end of the washer.
In this embodiment, sealing rings are arranged between the piston and the cylinder body, between the cylinder cover and the cylinder body, and between the cylinder body and the piston.
When the device is used, the first oil cavity 84 is filled with oil, the second oil cavity 85 is drained with oil, the piston 82 pushes the pull rod to move forwards by overcoming the acting force exerted on the pull rod by the disc spring, so that the claw pieces of the chuck are far away from the conical hole and move centrifugally, and a bar material is plugged into the chuck; the second oil cavity is filled with oil, the first oil cavity is drained with oil, the piston is separated from transmission connection with the pull rod, the disc spring pushes the first end of the connecting sleeve through the gasket, and the second end of the connecting sleeve pushes the fixing sleeve, so that the pull rod is driven to move backwards along the axial direction of the main shaft, the claw valve of the chuck moves backwards and axially in the conical hole and moves centripetally, and the bar is clamped by the claw valve.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the technical spirit of the present invention made to the above embodiments are also within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a bar adds clamping apparatus which characterized in that: the oil cylinder comprises a cylinder body, a piston and a cylinder cover, the piston divides the cylinder body into a first oil cavity and a second oil cavity which are mutually independent, the piston acts on the pull rod, the first oil cavity is filled with oil, the second oil cavity is filled with oil, the piston pushes the pull rod to overcome the acting force applied by the elastic piece to the pull rod to move forwards, so that the claw pieces of the chuck move forwards, the claw pieces of the chuck are far away from the tapered hole and move centrifugally, and the second oil cavity is filled with oil, the first oil cavity discharges oil, and the piston is separated from the transmission connection with the pull rod.
2. The bar stock machining clamp of claim 1, wherein: a fixed sleeve is fixed on the pull rod, and the rear end of the elastic piece acts on the fixed sleeve.
3. A bar stock machining clamp as set forth in claim 2, wherein: a shaft fixing seat is fixed at the rear end of the main shaft, and the front end of the elastic piece acts on the shaft fixing seat.
4. A bar stock machining clamp as set forth in claim 3, wherein: the fixed seat rear end of axle is provided with an annular space that is used for holding the elastic component, the fixed seat rear end of axle is provided with the packing ring that seals the elastic component in this annular space, the cover is equipped with a adapter sleeve on the pull rod between packing ring and the fixed cover, the adapter sleeve has the first end that the top supported on the packing ring, the top supports the second end at fixed cover rear end and is used for the third end of being connected with piston drive.
5. The bar stock machining clamp of claim 4, wherein: the rear end of the shaft fixing seat is in threaded connection with a nut for preventing the gasket from being separated, and the first end of the connecting sleeve penetrates through the nut to act on the gasket.
6. The bar stock machining clamp of claim 4, wherein: the piston is provided with a fourth end which is in transmission connection with the third end of the connecting sleeve, when the second end of the connecting sleeve props against the fixed sleeve, a first gap is reserved between the third end of the connecting sleeve and the front end of the fixed sleeve, a second gap is reserved between the third end and the fourth end, and the second gap is larger than the first gap.
7. The bar stock machining clamp of claim 6, wherein: the cylinder cover is provided with an annular convex shoulder, the piston is provided with a fifth end used for being in contact with the convex shoulder, a third gap is reserved between the convex shoulder and the fifth end, and the third gap is larger than the total width of the first gap and the second gap.
8. The bar stock machining clamp of claim 7, wherein: and the shoulder is provided with an adjusting gasket for adjusting the width of the third gap.
9. A bar processing clamp as set forth in any one of claims 1 to 8, characterized in that: the elastic piece is a disc spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021295434.6U CN212420895U (en) | 2020-07-05 | 2020-07-05 | Bar processing clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021295434.6U CN212420895U (en) | 2020-07-05 | 2020-07-05 | Bar processing clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212420895U true CN212420895U (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021295434.6U Active CN212420895U (en) | 2020-07-05 | 2020-07-05 | Bar processing clamp |
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| CN (1) | CN212420895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115383158A (en) * | 2022-08-04 | 2022-11-25 | 武汉重型机床集团有限公司 | Clamping system of vertical lathe tool holder |
-
2020
- 2020-07-05 CN CN202021295434.6U patent/CN212420895U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115383158A (en) * | 2022-08-04 | 2022-11-25 | 武汉重型机床集团有限公司 | Clamping system of vertical lathe tool holder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210416 Address after: 361000, No. 69, prosperous road, Huli District, Fujian, Xiamen Patentee after: XIAMEN GOLDEN EGRET SPECIAL ALLOY Co.,Ltd. Address before: 541, 5 / F, 32 Xiangming Road, torch hi tech Zone (Xiang'an) Industrial Zone, Xiamen City, Fujian Province Patentee before: Xiamen Xinghong Jiye Machinery Manufacturing Co.,Ltd. |
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| TR01 | Transfer of patent right |