Workpiece clamping mechanism

Abstract

The utility model relates to the technical field of workpiece clamping, in particular to a workpiece clamping mechanism which comprises a surrounding-shaped base and a plurality of clamping devices, the clamping devices are arranged on the surrounding-shaped base, a machining area is formed in the middle of the surrounding-shaped base and used for containing workpieces, and the clamping devices extend into the machining area to clamp the workpieces. A track is arranged on the surrounding-shaped base, the clamping device is in sliding connection with the track so that the clamping device can move along the track to change the clamping direction, the clamping device comprises a clamping body and a locking assembly, and the locking assembly is used for locking the clamping device on the track. The clamping device is arranged on the track surrounding the base, so that the position of the clamping device can be adjusted along the track, the clamping direction is adjusted, and a better clamping effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to workpiece clamping technical field, concretely relates to a workpiece clamping mechanism. BACKGROUND

[0002] In addition to standard components, there are also a large number of non-standard components in modern enterprise production and manufacturing. Single-piece, small-batch, and special non-standard components are gradually becoming new production demands of modern mechanical manufacturing industry. The manufacturing and processing precision and quality of non-standard components directly affect the quality of the final product. Under such demand, the tooling fixture equipment is required to have better flexibility to shorten the production preparation time and reduce the production cost.

[0003] Currently, there are mainly two kinds of non-standard component fixtures used by enterprises: one is to clamp the workpiece through movable clamping pieces on both sides, each side being in multiple-point contact with the workpiece to adapt to the shape of the non-standard component; the other is to set multiple clamping pieces around the workpiece placement area to clamp the workpiece from different directions. In these two kinds of non-standard component fixtures, the contact area of the former on both sides of the workpiece is too large, which may not be conducive to subsequent processing. Although the latter clamps the workpiece from multiple directions, the directions are fixed. When the non-standard component has a complex external contour shape, it is difficult to ensure that each clamping piece is in good supporting and approximately perpendicular extrusion with the non-standard component, that is, when part of the clamping pieces extrude the non-standard component from the direction of the clamping pieces themselves, the included angle between the extruded part of the non-standard component and the clamping piece is small, resulting in low extrusion strength and affecting the overall clamping firmness. SUMMARY

[0004] The utility model discloses a workpiece clamping mechanism, solve the problem that the clamping device's clamping direction is not adjustable, through the clamping device is located around the track of the surrounding base, to make the clamping device can adjust the position along the track, thereby adjusting the clamping direction, obtain better clamping effect.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme: a workpiece clamping mechanism, including surrounding base and multiple clamping devices, multiple clamping devices are located in surrounding base, the surrounding base middle forms processing area, for placing workpiece, the clamping device enters processing area to clamp workpiece, the surrounding base is equipped with track, the clamping device is connected with the track sliding, to make the clamping device moves along the track and changes the clamping direction, the clamping device includes clamping main part and locking assembly, the locking assembly is used to lock the clamping device on the track.

[0006] In an embodiment, the track extends along the circumference of the surrounding base, so that the clamping device adjusts position along the circumference of the surrounding base.

[0007] In an embodiment, the surrounding base is provided with two or more tracks, and the tracks are arranged on the surrounding base in an up-down manner.

[0008] In an embodiment, each track is provided with a plurality of clamping devices, so as to clamp workpieces in at least two circumferential directions.

[0009] In an embodiment, the surrounding base has a ring structure formed by a circular or polygonal surrounding.

[0010] In an embodiment, the locking assembly comprises a clamping plate and a plug, one end of the clamping plate is rotatably connected to the clamping body, and the other end is provided with the plug, the surrounding base is provided with a plug interface arranged along the extension direction of the track, and the plug is inserted into the plug interface to lock the locking device.

[0011] In an embodiment, the clamping body comprises a sliding part, a clamping part, and a spring, the sliding part is slidably connected to the track, and the sliding part is provided with an adjusting hole; the clamping part comprises a moving segment and a pressing segment, the moving segment is arranged in the adjusting hole, and the spring is arranged between the pressing segment and the sliding part to elastically support the clamping part.

[0012] In an embodiment, the clamping body further comprises a rotating head, the rotating head is arranged in the adjusting hole and is threadedly connected to the adjusting hole, the rotating head is provided with an eccentric hole, the moving segment is arranged in the eccentric hole, so that the rotating head is rotated to drive the clamping part to change position.

[0013] In an embodiment, the surrounding base comprises a vertical base plate and an inclined base plate connected in sequence in an up-down manner, and the track is arranged on the vertical base plate and the inclined base plate.

[0014] In an embodiment, the extension direction of the clamping part arranged on the vertical base plate is perpendicular to the vertical base plate, and the extension direction of the clamping part arranged on the inclined base plate is perpendicular to the inclined base plate.

[0015] The beneficial effects of the present application compared with the prior art are:

[0016] The workpiece clamping mechanism can achieve good clamping of non-standard workpieces of various shapes and special shapes by adjusting the position of the clamping device, which is not only highly versatile and applicable to various non-standard workpieces, but also has better clamping effect and can improve the processing quality of various non-standard workpieces. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0018] Figure 1 The figure is a schematic diagram of the overall structure of the workpiece clamping mechanism of the first embodiment of the present application.

[0019] Figure 2 The figure is a schematic diagram of the improvement of the track in the second embodiment of the present application.

[0020] Figure 3 The figure is a schematic diagram of one embodiment of the surrounding base in the third embodiment of the present application.

[0021] Figure 4 The figure is a schematic diagram of another embodiment of the surrounding base in the third embodiment of the present application.

[0022] Figure 5 The figure is a schematic diagram of the structure of the locking assembly in the fourth embodiment of the present application.

[0023] Figure 6 The figure is a schematic diagram of the structure of the clamping body in the fifth embodiment of the present application.

[0024] Figure 7 The figure is a schematic diagram of the structure of the clamping body in the sixth embodiment of the present application.

[0025] Figure 8 The figure is a schematic diagram of the cross-sectional view of the surrounding base in the seventh embodiment of the present application. DETAILED DESCRIPTION

[0026] The terms "first", "second", "third", etc. are only used for differentiation and description, and do not represent the arrangement sequence number, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the present application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In the description of the present application, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication inside two elements.

[0030] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings.

[0031] Please refer to Figure 1 which is a general structure schematic diagram of the workpiece clamping mechanism of the first embodiment of the present application. As shown in Figure 1As shown, the workpiece clamping mechanism comprises a surrounding base 100 and a plurality of clamping devices 200 arranged on the surrounding base 100. The surrounding base 100 forms a machining area 300 in the middle thereof by virtue of the surrounding structure thereof, for placing workpieces. The clamping devices 200 arranged on the surrounding base 100 extend into the machining area 300 to clamp the workpieces located in the machining area 300. The difference of the first embodiment from the prior art mainly lies in that the surrounding base 100 is provided with a track 110, and the clamping devices 200 are in sliding connection with the track 110, so that the clamping devices 200 can move along the track 110 to adjust the positions of the clamping devices 200 on the surrounding base 100, thereby adjusting the specific clamping directions of the clamping devices 200. Thus, when facing various non-standard workpieces with different shapes and special shapes, the positions of the clamping devices 200 can be adjusted based on the specific shapes of the non-standard workpieces, and the clamping directions of the clamping devices 200 are adjusted to directions most beneficial to clamping the non-standard workpieces. For example, the direction in which the clamping devices 200 extend to the non-standard workpieces to clamp the non-standard workpieces is substantially perpendicular to the local surface of the non-standard workpiece in contact with the clamping devices 200. Thus, the component force of the clamping devices 200 in other directions can be reduced, the stress effect of the non-standard workpiece at the position is improved, thereby improving the clamping effect of the clamping devices 200 on the non-standard workpiece, improving the clamping firmness, and ensuring good subsequent machining of the non-standard workpiece. The workpiece clamping mechanism in the first embodiment can clamp various non-standard workpieces with different shapes and special shapes by adjusting the positions of the clamping devices 200, which is not only highly versatile and applicable to various non-standard workpieces, but also has better clamping effect, thereby improving the subsequent machining quality of various non-standard workpieces. Moreover, the clamping devices 200 comprise clamping bodies 210 and locking assemblies 220. When the clamping devices 200 are adjusted to the required clamping positions, the locking assemblies 220 are used to lock the clamping devices 200 on the track 110 to avoid movement of the clamping devices 200 during clamping of the workpieces.

[0032] Further, the track 110 in the first embodiment is further improved, as shown in the second embodiment. Figure 1As shown, the track 110 extends along the circumference of the surrounding base 100, so that the clamping device 200 can move along the circumference of the surrounding base 100 to adjust the position, thereby achieving the adjustment of the clamping direction. In this embodiment, one specific implementation is that the track 110 extends along the entire outer circumference of the surrounding base 100, that is, the track 110 itself also forms a surrounding structure, so that the clamping device 200 can be adjusted to any position on the circumference of the surrounding base 100, further increasing the selectable clamping direction, that is, the structure shown in the figure; another specific implementation is that the track 110 extends along a part of the outer circumference of the surrounding base 100, that is, the track 110 is only provided on a part of the outer circumference of the surrounding base 100, so that the clamping device 200 provided on the track 110 can only adjust the position in the corresponding part of the outer circumference of the surrounding base 100. Further, this embodiment usually needs to provide two or more tracks 110 in specific implementation, and these tracks 110 are distributed in different areas on the circumference of the surrounding base 100, so that there is a corresponding track 110 at any position on the circumference of the surrounding base 100, avoiding the existence of dead angle positions that the clamping device 200 cannot reach.

[0033] Please refer to Figure 2 , which shows a schematic diagram of further improvement of the track 110 in the first embodiment in the second embodiment of the application. As shown in Figure 2 , two or more tracks 110 are provided on the surrounding base 100, and the tracks 110 are arranged above and below the surrounding base 100, so that the surrounding base 100 has two or more tracks 110 at different height positions, so that the clamping device 200 can extend into the processing area 300 from different heights, thereby enabling the workpiece to be clamped at different heights, further improving the clamping effect. Further, in this third embodiment, a plurality of clamping devices 200 are provided on each track 110, that is, the plurality of clamping devices 200 on each track 110 can collectively clamp the workpiece in one circumferential direction, and two or more tracks 110 can achieve two or more layers of clamping of the workpiece, so that the workpiece is clamped at multiple points in the height direction and the circumferential direction, and the clamping effect is further improved.

[0034] Please refer to Figure 3 and Figure 4 , which are schematic diagrams of improvement of the shape structure of the surrounding base 100 in the first embodiment in the third embodiment. As shown in Figure 3 , the surrounding base 100 forms a ring structure along a circular circumference, so that the structural strength of the surrounding base 100 itself can be improved, thereby improving the clamping effect on the workpiece, and the smoothness of the movement of the clamping device 200 along the track 110 can be improved, reducing the occurrence of dead points and stalls during the movement of the clamping device 200 along the track 110. As shown in Figure 4As shown, the surrounding base 100 forms a ring structure around the polygon, preferably a regular polygon structure, which can also improve the structural strength of the surrounding base 100 itself, thereby improving the clamping effect on the workpiece. Moreover, the polygonal structure is composed of a plurality of straight edges, and when the force direction of the clamping device 200 is generally perpendicular to the straight edges of the polygonal structure, the force effect is better and more stable when the straight edges are under pressure. As for the corner part of the polygonal structure, the track 110 can be processed into a circular arc shape at this part to avoid the clamping device 200 being stuck at this part.

[0035] In the embodiment of the present application, after the clamping device 200 is adjusted to a certain position along the track 110 for clamping the workpiece, when the clamping direction (i.e. the force direction) of the clamping device 200 is generally perpendicular to a certain face of the surrounding base 100 where the clamping device 200 is located, the force between the clamping device 200 and the surrounding base 100 is relatively stable, and even if the clamping force is large, the clamping device 200 generally will not move. However, in actual machining conditions, it is often accompanied by vibration and other situations, at which time the stability of the clamping device 200 is affected. If the clamping device 200 is shaken together, it will move, and once the clamping device 200 moves away from the original stable position, the pressure on the clamping device 200 due to clamping the workpiece may cause the clamping device 200 to slide along the track 110, resulting in the clamping device 200 being out of the clamping state, causing the workpiece machining to fail, and even safety hazards.

[0036] Therefore, in the first embodiment of the present application, the clamping device 200 includes a clamping body 210 and a locking assembly 220, which is used to lock the clamping device 200 on the track 110 to avoid the clamping device 200 from moving during the clamping process of the workpiece. Specifically, please refer to Figure 5 , which is a structural schematic diagram of the locking assembly 220 in the fourth embodiment of the present application. As shown in Figure 5 , the locking assembly 220 in the fourth embodiment includes a buckle plate 221 and a plug-in head 222. One end of the buckle plate 221 is rotatably connected to the clamping body 210, and the other end is provided with the plug-in head 222. The surrounding base 100 is provided with a plug-in port 120 arranged along the extension direction of the track 110, which is used for the plug-in head 222 to be inserted to lock the locking device. When the clamping device 200 is moved, the plug-in head 222 of the buckle plate 221 is not connected with the plug-in port 120, and the clamping device 200 can be freely moved along the track 110. Since the plug-in port 120 is arranged along the extension direction of the track 110 on the surrounding base 100, it can meet the locking of the clamping device 200 at any position. When the clamping device 200 is moved to the required position, the buckle plate 221 is pushed to rotate, and the plug-in head 222 on it is inserted into the plug-in port 120 on the surrounding base 100, realizing the positioning of the clamping device 200 in the circumferential direction of the surrounding base 100, avoiding the movement of the clamping device 200 during the machining process of the workpiece, and ensuring the machining quality of the workpiece.

[0037] Please refer to Figure 6 This is a structural schematic diagram of the clamping body 210 in the fifth embodiment of this application. Figure 6 As shown, in the fifth embodiment, the clamping body 210 includes a sliding part 211, a clamping part 212, and a spring 213. The sliding part 211 is slidably connected to the track 110 and has an adjustment hole 2111. The clamping part 212 includes a moving section 2121 and a pressing section 2122. The moving section 2121 passes through the adjustment hole 2111, and the spring 213 is located between the pressing section 2122 and the sliding part 211, providing elastic support to the clamping part 212. The moving section 2121 of the clamping part 212 passes through the adjustment hole 2111 and can move within it. The outer diameter of the pressing section 2122 of the clamping part 212 is larger than the outer diameter of the moving section 2121, so the spring 213, positioned between the pressing section 2122 and the sliding part 211, can generate elastic force through the compression of both sections. In use, the pressing section 2122 is pushed toward the sliding part 211. The pressing section 2122 approaches the sliding part 211 and presses the spring 213. The moving section 2121 moves within the adjusting hole 2111, causing the clamping device 200 to retract to free up as much space as possible in the processing area 300. After the workpiece is placed in the processing area 300, no more pushing force is applied to the pressing section 2122. At this time, the spring 213 pushes the pressing section 2122 toward the workpiece by its own elastic force until it abuts against the workpiece. When all the clamping devices 200 used for this clamping abut against the workpiece through the pressing section 2122 of the clamping part 212, the clamping of the workpiece is achieved. Furthermore, the moving section 2121 and the pressing section 2122 are fixedly connected as one unit. The moving section 2121 passes through the adjusting hole 2111. In one specific embodiment, the moving section 2121 cooperates with the adjusting hole 2111. In this way, in addition to allowing the moving section 2121 to move back and forth freely, the adjusting hole 2111 provides limiting support for the moving section 2121 in other directions, thereby improving the overall strength and stability of the clamping part 212.

[0038] It should be noted that in the fifth embodiment, the two ends of the spring 213 can only be in abutting relationship with the pressing section 2122 and the sliding section 211 of the clamping part 212, without the need for a fixed connection. In this way, the clamping part 212 can be directly pulled out. When dealing with smaller workpieces, a longer clamping part 212 can be used. The spring 213 is sleeved around the moving section 2121 of the clamping part 212, and then the moving section 2121 is inserted into the adjustment hole 2111 of the sliding part 211.

[0039] Furthermore, the clamping body 210 of the fifth embodiment of this application is improved to obtain the sixth embodiment, please refer to... Figure 7Fig. 6 is a structural schematic diagram of the clamping body 210 of the seventh embodiment of the present application. As shown in Figure 7 The clamping body 210 further comprises a rotating head 214 arranged in the adjusting hole 2111 and threadedly connected with the adjusting hole 2111. The rotating head 214 is provided with an eccentric hole 2141, and the moving section 2121 is arranged in the eccentric hole 2141. If the rotating head 214 is rotated, the rotating head 214 is rotated in the adjusting hole 2111 through the thread, the position of the eccentric hole 2141 can be changed, and the rotating head 214 itself will not be separated from the adjusting hole 2111, so that the position of the clamping section 212 is changed to a small extent, that is, the clamping direction is changed. This case is a fine adjustment of the position of the clamping section 212 in the clamping device 200 relative to the adjustment of the position of the entire clamping device 200 along the track 110. In actual use, the general clamping direction of the clamping device 200 is determined after the clamping device 200 is adjusted to a certain position along the track 110 and locked, and then the clamping direction is fine adjusted by rotating the rotating head 214 based on actual needs, so that the clamping direction is further adjusted to a more suitable angle, and the clamping effect is further improved.

[0040] It should be noted that the track 110 in the embodiment of the present application is arranged on the inner side of the surrounding base 100, that is, the side facing the machining area 300, and the outer side of the surrounding base 100 is reserved to ensure the integrity of the surrounding base 100. Correspondingly, the clamping device 200 also needs to be arranged on the inner side of the surrounding base 100, so as to be slidingly connected to the track 110. In the sixth embodiment, the rotating head 214 is provided with a protruding protrusion towards the machining area 300, and when the rotating head 214 needs to be rotated, the protrusion is pushed to drive the rotating head 214 to rotate.

[0041] Please refer to Figure 8 Fig. 7 is a cross-sectional schematic diagram of the surrounding base 100 of the seventh embodiment of the present application. As shown in Figure 8 The surrounding base 100 comprises a vertical base plate 130 and an inclined base plate 140 connected in sequence from top to bottom, and the track 110 is arranged on the vertical base plate 130 and the inclined base plate 140. The number of the vertical base plate 130 and the number of the inclined base plate 140 can be one or more than two. As a preferred embodiment, the surrounding base 100 comprises a vertical base plate 130 located in the middle and inclined base plates 140 connected to the upper and lower sides of the vertical base plate 130. The two inclined base plates 140 are arranged symmetrically from top to bottom, and the track 110 is arranged on the vertical base plate 130 and the inclined base plate 140. A plurality of clamping devices 200 are arranged on each track 110, so as to realize multi-point clamping of the workpiece.

[0042] The pushing direction of the spring 213 applied to the clamping part 212 is consistent with the extending direction of the clamping part 212, and the optimal stress state of the clamping part 212 when clamping the workpiece is that the extending direction of the clamping part 212 is substantially perpendicular to the contact part of the clamping part 212 and the workpiece, and is substantially perpendicular to the stress surface around the shaped base 100. Therefore, further, the extending direction of the clamping part 212 on the vertical base plate 130 in the seventh embodiment is perpendicular to the vertical base plate 130, and the extending direction of the clamping part 212 on the inclined base plate 140 is perpendicular to the inclined base plate 140, so as to reduce the component force, improve the force transmission, and thus improve the clamping effect.

[0043] The above merely describes the specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A workpiece clamping mechanism comprising a surrounding base and a plurality of clamping devices disposed in the surrounding base, the surrounding base defining a processing region in the middle thereof for placing a workpiece, the clamping devices extending into the processing region for clamping the workpiece, characterized in that, The surrounding base is provided with a track, and the clamping device is in sliding connection with the track, so that the clamping device moves along the track to change the clamping direction. The clamping device comprises a clamping body and a locking assembly, and the locking assembly is used to lock the clamping device on the track.

2. The workpiece clamping mechanism of claim 1, wherein The track extends along the circumference of the surrounding base, so that the clamping device adjusts the position along the circumference of the surrounding base.

3. The workpiece clamping mechanism of claim 1 or 2, wherein The surrounding base is provided with two or more tracks arranged above and below the surrounding base.

4. The workpiece clamping mechanism of claim 3, wherein A plurality of clamping devices are arranged on each track to clamp the workpiece in at least two circumferences.

5. The workpiece clamping mechanism of claim 1, wherein The surrounding base forms a ring structure along a circle or a polygon.

6. The workpiece clamping mechanism of claim 1, wherein The locking assembly comprises a buckle plate and a plug, one end of the buckle plate is rotatably connected to the clamping body, and the other end is provided with the plug. The surrounding base is provided with a plug-in interface arranged along the extension direction of the track, and the plug is inserted into the plug-in interface to lock the locking assembly.

7. The workpiece clamping mechanism of claim 1, wherein The clamping body comprises a sliding part, a clamping part and a spring. The sliding part is in sliding connection with the track, and the sliding part is provided with an adjusting hole. The clamping part comprises a moving segment and a pressing segment, the moving segment is arranged in the adjusting hole, and the spring is arranged between the pressing segment and the sliding part to elastically support the clamping part.

8. The workpiece clamping mechanism of claim 7, wherein, The clamping body further comprises a rotating head arranged in the adjusting hole and in threaded connection with the adjusting hole. The rotating head is provided with an eccentric hole, and the moving segment is arranged in the eccentric hole, so that the rotating head rotates to change the position of the clamping part.

9. The workpiece clamping mechanism of claim 7, wherein, The surrounding base comprises a vertical base plate and an inclined base plate connected in sequence. The track is arranged on the vertical base plate and the inclined base plate.

10. The workpiece clamping mechanism of claim 9, wherein, The extension direction of the clamping part arranged on the vertical base plate is perpendicular to the vertical base plate, and the extension direction of the clamping part arranged on the inclined base plate is perpendicular to the inclined base plate.

Images