CN114986206A

CN114986206A - Double-chain type clamping device

Info

Publication number: CN114986206A
Application number: CN202210793243.XA
Authority: CN
Inventors: 张天培; 孙建强; 严正丽; 杨青平; 戴时飞
Original assignee: Chengdu Yongfeng Technology Co ltd
Current assignee: Chengdu Yongfeng Technology Co ltd
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-09-02
Anticipated expiration: 2042-07-05
Also published as: CN114986206B

Abstract

The invention relates to the field of numerical control machining, and discloses a double-chain type clamping device which comprises V-shaped iron and a pressing piece used for pressing a workpiece on the V-shaped iron, wherein the pressing piece is attached to the surface of the workpiece through bending, one end of the pressing piece is connected to one side of the V-shaped iron, an adjusting device used for adjusting the pressing force of the pressing piece is arranged on the other side of the V-shaped iron, and the other end of the pressing piece is connected to the adjusting device. The workpiece is firmly pressed, the upper cambered surface is completely stressed, and the deformation is small. Secondly, the compressing piece can select reasonable length and height, thereby being convenient for clamping and ensuring safety.

Description

Double-chain type clamping device

Technical Field

The invention relates to the field of numerical control machining, in particular to a double-chain type clamping device.

Background

In the existing mechanical manufacturing industry, when end face holes of large-diameter shaft and cylinder parts are machined, a mode of pressing the upper bottom surface of a boring and milling machine by a V-shaped iron pressing plate is generally adopted. The advantage of this approach is ease of use, but the following disadvantages exist:

1) when the diameter of the workpiece exceeds 800 mm, the pressing plate is too long and is easy to deform, and the pressing bolt is far away from the workpiece, so that the pressing force is weakened.

2) The support sizing block is not safe when being too high.

3) The cylinder part, especially the thin-wall cylinder part, is easy to deform because the workpiece is stressed by one line of the upper cambered surface.

4) When the workpiece is more than 2 meters, the compression bolt is too high, which is not convenient for clamping and is unsafe.

Disclosure of Invention

The invention aims to provide a double-chain type clamping device, which solves the problems of poor convenience and low safety factor of the existing clamping device in clamping large-sized workpieces.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: the utility model provides a double-chain clamping device, includes V-arrangement iron and is used for compressing tightly the piece that compresses tightly on the V-arrangement iron with the work piece, compress tightly the piece through buckling the laminating on the surface of work piece, the one end that compresses tightly the piece is connected in one side of V-arrangement iron, the opposite side of V-arrangement iron is equipped with the adjusting device who is used for adjusting the dynamics that compresses tightly the piece, the other end that compresses tightly the piece is connected on adjusting device.

Preferably, the pressing piece is a single-row chain or a double-row chain.

Preferably, the adjusting device comprises an installation box arranged on one side of the V-shaped iron, a guide chain wheel and a locking chain wheel are arranged on the outer wall of one side of the installation box, the guide chain wheel is close to one side of the workpiece, the pressing piece bypasses and is meshed with the upper portion of the locking chain wheel from the lower portion of the guide chain wheel, and a locking structure for controlling the locking chain wheel to rotate is arranged on a first shaft rod of the locking chain wheel.

Preferably, a guide sleeve is arranged between the guide chain wheel and the locking chain wheel, one side of the guide sleeve is fixedly connected to the outer wall of the installation box, two ends of the guide sleeve are of arc structures, one end of the guide sleeve is sleeved on the lower portion of the guide chain wheel, and the other end of the guide sleeve is sleeved on the upper portion of the locking chain wheel; and a control structure for driving the guide chain wheel and the locking chain wheel to rotate is arranged in the mounting box.

Preferably, the control structure includes a drive shaft arranged in the installation box, the second shaft lever of the guide chain wheel and the first shaft lever of the locking chain wheel are in transmission connection with the drive shaft, and a rotary handle detachably connected with the drive shaft is arranged outside the installation box.

Preferably, the locking arrangement comprises a worm gear arranged on the first shaft, the drive shaft having a length of worm gear which meshes with the worm gear.

Preferably, a first bevel gear is arranged on the driving shaft, a second bevel gear meshed with the first bevel gear is arranged in the mounting box, and the second bevel gear is connected with the second shaft rod through a universal coupling.

Preferably, the second shaft lever and the driving shaft between the first bevel gear and the worm are both provided with a one-way driving control structure, the forward and reverse rotation of the driving shaft alternately controls the first shaft lever and the second shaft lever to rotate in opposite directions through the one-way driving control structure, the upper part of the guide sleeve is provided with an opening, and the opening is hinged with a magnetic cover plate.

Preferably, the one-way driving control structure comprises a tray body and a cover body, one end of the tray body is rotatably connected in the cover body, a sliding plate is connected in the cover body in a sliding manner, a plurality of ratchets are arranged on the end surface of the sliding plate, which is close to one side of the tray body, and a plurality of tooth sockets corresponding to the ratchets are arranged on the end surface of the tray body; the cover body is internally provided with an elastic plate which pushes the ratchet on the sliding plate into the tooth groove.

Preferably, a plurality of guide rods are arranged in the cover body, and the guide rods are all arranged on the sliding plate in a penetrating mode.

The beneficial effects of the invention are concentrated and expressed as follows:

1. the workpiece is tightly pressed, the upper cambered surface is completely stressed, and the deformation is small.

2. The compressing piece can be selected to be reasonable in length and height, so that the clamping is convenient, and the safety is guaranteed.

Drawings

FIG. 1 is a schematic view of the overall structure of the clamping device of the present invention;

FIG. 2 is a schematic view of the internal structure of the mounting box of the present invention;

FIG. 3 is a schematic view of the structure of the guide sleeve of the present invention;

FIG. 4 is a schematic axial cross-sectional view of a unidirectional drive control structure of the present invention;

illustration of the drawings: 0. a workpiece; 1. a V-shaped iron; 2. a compression member; 3. installing a box; 4. a guide sprocket; 5. locking the chain wheel; 6. a guide sleeve; 7. a drive shaft; 8. a second shaft lever; 9. a first shaft lever; 10. a worm gear; 11. a worm; 12. a first bevel gear; 13. a second bevel gear; 14. a universal coupling; 15. an opening; 16. a cover plate; 17. a tray body; 18. a cover body; 19. a sliding plate; 20. a ratchet; 21. a tooth socket; 22. an elastic plate; 23. a guide rod.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, a double-chain type clamping device comprises a V-shaped iron 1 and a pressing member 2 for pressing a workpiece 0 onto the V-shaped iron 1, wherein the workpiece 0 is placed in a concave area of the V-shaped iron 1, the pressing member 2 is attached to the surface of the workpiece 0 by bending, and then the workpiece 0 is pressed onto the V-shaped iron 1 by using the pressing member 2; in the embodiment, the clamping piece 2 adopts a single-row chain or a double-row chain, the chain can enable the bonding area on the arc-shaped surface of the workpiece 0 to be completely stressed, and the workpiece 0 is not easy to be damaged due to overlarge stress of a single point; one end of the pressing piece 2 is connected to one side of the V-shaped iron 1, one end (namely one end of the chain) of the pressing piece 2 is directly and fixedly connected to the base of the V-shaped iron 1 in the embodiment, the other side of the V-shaped iron 1 is provided with an adjusting device used for adjusting the pressing force of the pressing piece 2, the other end of the pressing piece 2 is connected to the adjusting device, and the chain is enabled to fix the workpiece 0 firmly through the adjusting device.

In the embodiment, the adjusting device comprises an installation box 3 arranged on one side of a V-shaped iron 1, a guide chain wheel 4 and a locking chain wheel 5 are arranged on the outer wall of one side of the installation box 3, the guide chain wheel 4 is close to one side of a workpiece 0, the pressing piece 2 bypasses from the lower part of the guide chain wheel 4 and is meshed with the upper part of the locking chain wheel 5, and a locking structure for controlling the locking chain wheel 5 to rotate is arranged on a first shaft rod 9 of the locking chain wheel 5; therefore, after the chain is wound on the guide chain wheel 4 and the locking chain wheel 5, the chain can be tightly pressed on the workpiece 0 by rotating the two chain wheels, after the adjustment is completed, the locking chain wheel 5 is locked by using the locking structure, in fig. 1, the locking chain wheel 5 cannot rotate anticlockwise in a locking state, and at the moment, the chain cannot retract, so that the chain is fixed.

And when the chain is installed, the manual winding of the chain is relatively complicated, and the convenience is relatively poor. In this embodiment, a guide sleeve 6 is arranged between the guide chain wheel 4 and the locking chain wheel 5, as shown in fig. 1 and 3, one side of the guide sleeve 6 is fixedly connected to the outer wall of the installation box 3, two ends of the guide sleeve 6 are arc-shaped, one end of the guide sleeve 6 is sleeved on the lower portion of the guide chain wheel 4, and the other end of the guide sleeve 6 is sleeved on the upper portion of the locking chain wheel 5; a control structure for driving the guide chain wheel 4 and the locking chain wheel 5 to rotate is arranged in the mounting box 3; therefore, when the chain is installed, the other end of the chain is inserted into the guide sleeve 6, the guide chain wheel 4 and the locking chain wheel 5 are rotated at the moment, the chain can move along the guide sleeve 6 under the driving of the wheel of the guide chain wheel 4, after the chain is contacted with the locking chain wheel 5, the chain is meshed with the locking chain wheel 5, the locking chain wheel 5 drives the chain to rotate together, and the chain is tensioned by the locking chain wheel 5.

Specifically, the control structure comprises a driving shaft 7 arranged in the installation box 3, as shown in fig. 2, the second shaft lever 8 of the guide chain wheel 4 and the first shaft lever 9 of the locking chain wheel 5 are in transmission connection with the driving shaft 7, and a rotary handle detachably connected with the driving shaft 7 is arranged outside the installation box 3; taking fig. 1 as an example, in the chain compressing process, the guide sprocket 4 needs to rotate counterclockwise, and the locking sprocket 5 needs to rotate clockwise; when the chain is loosened, the rotation directions of the two are opposite; in order to lock the locking sprocket 5, in the embodiment, the locking structure comprises a worm wheel 10 arranged on the first shaft rod 9, the driving shaft 7 is provided with a section of worm 11, and the worm 11 is meshed with the worm wheel 10; that is to say, the locking chain wheel 5 can only rotate under the driving of the driving shaft 7, and the locking chain wheel 5 can not rotate by itself, so as to achieve the purpose of locking.

Therefore, for the transmission structure of the second shaft 8 and the driving shaft 7, specifically, a first bevel gear 12 is arranged on the driving shaft 7, a second bevel gear 13 engaged with the first bevel gear 12 is arranged in the mounting box 3, and since the second bevel gear 13 and the second shaft 8 are not on the same axis, the second bevel gear 13 is connected with the second shaft 8 through a universal coupling 14; whereas the direction of rotation for the second shaft 8 and the first shaft 9 is different, it can be adjusted by changing the direction of the thread of the worm 11.

In the process of loosening the workpiece 0 by the chain, the guide chain wheel 4 and the locking chain wheel 5 need to be rotated reversely, the operation is relatively complicated, as a further optimization of the embodiment, an opening 15 is formed in the upper part of the guide sleeve 6, and a magnetic cover plate 16 is hinged to the opening 15; therefore, in the process of loosening the workpiece 0 by the chain, the chain is pulled up, the cover plate 16 is lifted, and the chain is separated from the locking chain wheel 5, so that the loosening operation of the chain is facilitated; under the operation step, the guide chain wheel 4 is required to rotate freely, namely, the guide chain wheel 4 can rotate freely both anticlockwise and clockwise; therefore, in the present embodiment, the second shaft 8 and the driving shaft 7 between the first bevel gear 12 and the worm 11 are both provided with a unidirectional driving control structure, and the forward and reverse rotation of the driving shaft 7 alternately controls the first shaft 9 and the second shaft 8 to rotate in opposite directions.

Specifically, the unidirectional driving control structure includes a tray body 17 and a cover body 18, as shown in fig. 4, one end of the tray body 17 is rotatably connected in the cover body 18, a sliding plate 19 is slidably connected in the cover body 18, that is, a plurality of guide rods 23 are arranged in the cover body 18, the guide rods 23 are all arranged on the sliding plate 19 in a penetrating manner, a plurality of ratchets 20 are arranged on the end surface of the sliding plate 19 close to one side of the tray body 17, and a plurality of tooth grooves 21 corresponding to the ratchets 20 are arranged on the end surface of the tray body 17; an elastic plate 22 for pushing the ratchet 20 on the sliding plate 19 into the tooth groove 21 is arranged in the cover body 18; that is, the second shaft lever 8 and the driving shaft 7 have two sections, and the one-way driving control structure is connected between the second shaft lever 8 or the driving shaft 7; when the cover is used, due to the arrangement of the ratchet teeth 20 and the tooth grooves 21, the cover body 18 can only rotate synchronously with the disc body 17 in one direction, for example, when the cover body 18 rotates clockwise, the ratchet teeth 20 are clamped into the tooth grooves 21 at the moment, and the disc body 17 is driven to rotate synchronously; at this time, when the cover 18 rotates counterclockwise, the ratchet 20 cannot be clamped into the tooth slot 21, at this time, the cover 18 cannot rotate synchronously with the disc 17, and for the direction of synchronous rotation, the direction of the ratchet 20 can be changed to change; in this case, during the releasing of the chain, the chain is pulled directly out of the guide sprocket 4 after the chain has been lifted off and separated from the locking sprocket 5.

In the installation process of the chain, the rotating handle is rotated positively, the guide chain wheel 4 rotates at the moment to drive the chain to move in the guide sleeve 6, and the locking chain wheel 5 is in a static state at the moment due to the arrangement of the one-way driving control structure on the driving shaft 7; when the chain moves to contact with the locking chain wheel 5, the rotating handle rotates reversely, and then drives the locking chain wheel 5 to start rotating, and due to the arrangement of the one-way driving control structure on the second shaft lever 8, the rotating handle rotates reversely and can not drive the guide chain wheel 4 to rotate; only after the chain meshes with locking sprocket 5, take leading sprocket 4 rotatory by the chain, this structure can effectively avoid between leading sprocket 4 and the locking sprocket 5 not synchronous, and then makes the chain can not be accurate and locking sprocket 5 meshes.

It should be noted that, for simplicity of description, the above-mentioned embodiments of the method are described as a series of acts or combinations, but those skilled in the art should understand that the present application is not limited by the order of acts described, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in this application.

Claims

1. The utility model provides a double-chain clamping device, includes V-arrangement iron (1) and is used for compressing tightly piece (2) that compress tightly on V-arrangement iron (1) with work piece (0), its characterized in that, compress tightly piece (2) through buckling the laminating on the surface of work piece (0), the one end that compresses tightly piece (2) is connected in one side of V-arrangement iron (1), the opposite side of V-arrangement iron (1) is equipped with the adjusting device who is used for adjusting the dynamics that compresses tightly piece (2), the other end that compresses tightly piece (2) is connected on adjusting device.

2. The double-chain type clamping device according to claim 1, wherein: the pressing piece (2) is a single-row chain or a double-row chain.

3. The double-chain type clamping device as claimed in claim 2, wherein: adjusting device is including setting up install bin (3) in V-arrangement iron (1) one side, the one side outer wall of install bin (3) is equipped with a leading sprocket (4) and a locking sprocket (5), leading sprocket (4) are close to work piece (0) one side, compress tightly piece (2) and walk around and mesh on the upper portion of locking sprocket (5) from the lower part of leading sprocket (4), be equipped with the rotatory locking structure of control locking sprocket (5) on the first axostylus axostyle (9) of locking sprocket (5).

4. A double-chain clamping device according to claim 3, wherein: a guide sleeve (6) is arranged between the guide chain wheel (4) and the locking chain wheel (5), one side of the guide sleeve (6) is fixedly connected to the outer wall of the installation box (3), two ends of the guide sleeve (6) are of arc structures, one end of the guide sleeve (6) is sleeved on the lower portion of the guide chain wheel (4), and the other end of the guide sleeve (6) is sleeved on the upper portion of the locking chain wheel (5); and a control structure for driving the guide chain wheel (4) and the locking chain wheel (5) to rotate is arranged in the mounting box (3).

5. The double-chain type clamping device as claimed in claim 4, wherein: the control structure comprises a driving shaft (7) arranged in the installation box (3), the second shaft lever (8) of the guide chain wheel (4) and the first shaft lever (9) of the locking chain wheel (5) are in transmission connection with the driving shaft (7), and a rotary handle which is detachably connected with the driving shaft (7) is arranged outside the installation box (3).

6. The double-chain type clamping device as claimed in claim 4, wherein: the locking structure comprises a worm wheel (10) arranged on the first shaft lever (9), a section of worm (11) is arranged on the driving shaft (7), and the worm (11) is meshed with the worm wheel (10).

7. The double-chain clamping device according to claim 6, wherein: a first bevel gear (12) is arranged on the driving shaft (7), a second bevel gear (13) meshed with the first bevel gear (12) is arranged in the installation box (3), and the second bevel gear (13) is connected with a second shaft lever (8) through a universal coupling (14).

8. The double-chain type clamping device as claimed in claim 7, wherein: the second shaft lever (8) and the driving shaft (7) between the first bevel gear (12) and the worm (11) are respectively provided with a one-way driving control structure, the forward and reverse rotation of the driving shaft (7) alternately controls the first shaft lever (9) and the second shaft lever (8) to rotate in opposite directions through the one-way driving control structure, the upper part of the guide sleeve (6) is provided with an opening (15), and the opening (15) is hinged with a magnetic cover plate (16).

9. The double-chain clamping device as claimed in claim 8, wherein: the unidirectional drive control structure comprises a disc body (17) and a cover body (18), one end of the disc body (17) is rotatably connected in the cover body (18), a sliding plate (19) is connected in the cover body (18) in a sliding mode, a plurality of ratchets (20) are arranged on the end face, close to the disc body (17), of the sliding plate (19), and a plurality of tooth grooves (21) corresponding to the ratchets (20) are formed in the end face of the disc body (17); an elastic plate (22) which pushes the ratchet (20) on the sliding plate (19) into the tooth groove (21) is arranged in the cover body (18).

10. The double-chain clamping device as claimed in claim 9, wherein: a plurality of guide rods (23) are arranged in the cover body (18), and the guide rods (23) are all arranged on the sliding plate (19) in a penetrating mode.