CN112128163A

CN112128163A - Precision 3C processing safety clamping and positioning module

Info

Publication number: CN112128163A
Application number: CN202011099361.8A
Authority: CN
Inventors: 王真立
Original assignee: Hitop Industrial Holdings Co ltd
Current assignee: Hitop Industrial Holdings Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2020-12-25

Abstract

The utility model relates to a work piece clamping device technical field, in order to solve the technical problem that current tool positioning accuracy is low, easily card dies and do not have the protection function of cutting off the gas, this application provides a accurate 3C processing safety centre gripping positioning module, include driving shaft, driven shaft and rotation-proof sleeve including accurate 3C processing safety centre gripping positioning module, driving shaft and driven shaft pass through wedge mechanism and connect, the driving shaft is provided with the first inclined plane of driving shaft, the driven shaft is provided with the first inclined plane of driven shaft, prevents changeing the tangent plane, the rotation-proof sleeve is installed on the driven shaft, prevent changeing the cover medial surface with prevent changeing tangent plane sliding contact. The anti-rotation sleeve is also provided with an anti-rotation limiting part for increasing the contact area with the tangent plane. The clamping fingers are driven by the two cylinders independently, and the springs are used for clamping and buffering, so that the positioning precision is achieved by precise rotation prevention; the structure is fully protected through a fully-sealed design, IP65 grade protection is realized, and the problem of blocking is solved; the air cut-off is kept by closing the electromagnetic valve with an additional middle position.

Description

Precision 3C processing safety clamping and positioning module

Technical Field

The application relates to the technical field of workpiece clamping devices, in particular to a precision 3C processing safety clamping and positioning module which is mainly used for 3C processing clamping and positioning working conditions, and is especially used for processing high-precision accessories such as a current smart phone, smart watch glass, a middle frame and a rear cover.

Background

In the 3C industry in recent years, the global smart phone watch is updated at a high speed, and related production accessories, clamping jigs and technological equipment are also iterated rapidly. The material of the middle frame of the rear cover is changed from aluminum → stainless steel → glass → ceramic, and the process is more and more complex according to the processing difficulty and the improvement of the product precision. At the present stage, workpieces made of glass and ceramic materials are easy to be condensed into powder in the machining process, and the fixture is stacked for a long time to cause the clamping of the positioning system.

The jig currently used for production has the following disadvantages:

the jig structure usually adopts a cylinder and an additional mechanical structure, the structure is driven by a wedge-shaped block, although the synchronism is good, the situation that the Y (X) direction does not reach after the workpiece is clamped in the X (Y) direction due to the structure clearance is often caused, and the positioning precision is lower; because the additional wedge-shaped mechanism cannot be used for protection, powder accumulation is easy to occur at the matched position, the action is not in place often, the blocking is easy to cause, and the maintenance cost is high; the mode of an additional mechanism needs more resources for assistance, and the scheme of the whole machine is more efficient in the era of process subdivision at present.

Content of application

In order to solve the technical problems of low positioning precision, easy clamping and no air-break protection function of the existing jig, the application provides a precise 3C processing safety clamping and positioning module, clamping fingers are independently driven by two cylinders, a spring is used for clamping and buffering, and the positioning precision is solved by precise rotation prevention; the structure is fully protected through a fully-sealed design, IP65 grade protection is realized, and the problem of blocking is solved; the air cut-off is kept by closing the electromagnetic valve with an additional middle position.

In order to achieve the purpose, the technical scheme of the application is realized as follows:

accurate 3C processing safety centre gripping orientation module includes driving shaft, driven shaft and anti-rotating sleeve, driving shaft and driven shaft pass through wedge mechanism and connect, the driving shaft is provided with the first inclined plane of driving shaft, the driven shaft is provided with the first inclined plane of driven shaft, prevents changeing the tangent plane, the anti-rotating sleeve is installed on the driven shaft, the anti-rotating sleeve medial surface with prevent changeing tangent plane sliding contact.

As one embodiment, the anti-rotation sleeve is further provided with an anti-rotation limiting part for increasing the contact area with the tangent plane.

As one embodiment, a dust scraping sleeve is further installed between the driven shaft and the inner wall of the cylinder body.

As one embodiment, the dust scraping sleeve is provided with a groove, and a static sealing ring is installed in the groove.

As one embodiment, the driven shaft is provided with an annular groove which is provided with a dynamic protection sealing ring.

As one embodiment, a spring for buffering and returning is further arranged at the bottom of the driven shaft.

As one embodiment, the lower end of the driving shaft is a stepped shaft, and a buffer ring is arranged on the thin shaft part of the stepped shaft.

As one of the embodiments, the number of the driving shaft and the driven shaft is two, respectively.

As one example, two driven shafts are vertically distributed.

As one embodiment, the anti-rotation sleeve is externally square and annular.

The beneficial effect that this application of implementation brought is:

the internal structure of the cylinder body is driven by the wedge-shaped block, the synchronism is good, two cavities in the cylinder body are connected through equidistant isometric process air holes to form equidistant air paths, the passing time of driving gas is ensured to be consistent, and the positioning precision is high; all interfaces with leakage adopt sealing measures, the sliding fit clearance between the driven shaft and the dust scraping sleeve is only 0.005mm, the dust scraping function is realized, meanwhile, the dynamic sealing element is assisted, the protection grade is more than IP65, and the maintenance cost is reduced; the mode of an additional mechanism is abandoned, the integrated design is realized, and the efficiency is improved.

Drawings

FIG. 1 is a cross-sectional view of a main structure provided in an embodiment of the present application;

fig. 2 is a perspective structural view provided in an embodiment of the present application;

FIG. 3 is a key block diagram provided in an embodiment of the present application;

fig. 4 is a driving structure diagram provided in the embodiment of the present application;

FIG. 5 is a driven shaft structure view provided in an embodiment of the present application;

FIG. 6 is a perspective view of the guide anti-rotation structure provided in the embodiment of the present application;

fig. 7 is a structure diagram of a guide seal provided in an embodiment of the present application.

In the figure: a cylinder body 1; a groove 1A; a mounting hole 1B; a spring 2; a driving shaft 3; an anti-rotation sleeve 4; an anti-rotation limiting portion 4A; a dust scraping sleeve 5; a driven shaft 6; an XY-link 7; a piston 8; a magnetic induction mounting base 9; a rear cover 10; a threaded seal 11; a dynamic protective sealing ring 12; a static seal ring 13; a drive shaft first bevel 31; a drive shaft second bevel 32; driven shaft first bevel 61; driven shaft second ramp 62; an anti-rotation cut surface 63.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 and 2, a main structure and a three-dimensional structure diagram provided in the embodiment of the present application are respectively provided, including a cylinder body 1, a spring 2, a driving shaft 3, an anti-rotation sleeve 4, a dust scraping sleeve 5, a driven shaft 6, an XY connector 7, a piston 8, a magnetic induction mounting base 9, and a rear cover 10.

The cylinder body 1 is a structural carrier of the whole driving mechanism, the cylinder body 1 is integrally cylindrical, a plurality of grooves 1A which are sunken inwards are formed in the periphery of the cylinder, the grooves 1A extend downwards, mounting holes 1B are formed in the bottoms of the grooves 1A and can be connected with a machine tool workbench to provide mounting carriers for customizing clamping accessories for customers; the lower part of the side surface of the cylinder body 1 is provided with an A port and a B port for air inlet and air outlet; a fixing hole for accommodating the driven shaft 6 is formed in the upper portion of the side face of the cylinder body 1, one end of the L-shaped XY connecting piece 7 is connected with the driven shaft 6, and the other end of the L-shaped XY connecting piece is in contact with the upper end face of the cylinder body 1.

The inside actuating mechanism that is equipped with of cylinder body 1, actuating mechanism is including the piston 8 that is used for driving shaft 3, piston 8 and driving shaft 3 pass through the piston rod and connect, the piston rod runs through in piston 8, piston 8 is equipped with the ring shape slot that is used for installing the sealing washer, the upper end and the driving shaft of piston rod are connected, the lower extreme and the magnetic induction mount pad 9 of piston rod are connected, magnetic induction mount pad 9 is in the lower part of piston 8, back lid 10 is installed to the lower part of magnetic induction mount pad 9, back lid 10 is equipped with the ring shape slot that is used for installing the sealing washer, in order to prevent to leak gas outward from piston rod department and prevent that outside dust from sneaking into the jar, back lid 10 is equipped with the air inlet and outlet opening, be equipped with the uide bushing on the pole side end cover.

The upper part of the piston 8 is sunken in a concave shape, the lower end of the driving shaft 3 is provided with a stepped shaft, and the thick shaft part of the driving shaft 3 is in sliding contact with the inner wall of the sunken part of the piston 8;

further, a buffer ring is attached to the thin shaft portion of the drive shaft 3 to reduce stress and impact force. The cushion ring is located between the outside of the thin shaft part and the inner wall of the piston 8.

Referring to fig. 4, the driving shaft 3 and the driven shaft 6 are wedge mechanisms, and a first driving shaft inclined plane 31 and a second driving shaft inclined plane 32 are arranged at the top of the driving shaft 3;

referring to fig. 5, the driven shaft 6 is provided with a driven shaft first inclined surface 61 and a driven shaft second inclined surface 62;

when air enters the port B, the piston 8 drives the driving shaft 3, the driving shaft 3 drives the driven shaft 6 through the wedge-shaped mechanism, the first inclined surface 31 of the driving shaft is in contact with the first inclined surface 61 of the driven shaft, the driving shaft 3 and the driven shaft 6 form a sliding friction pair moving relatively, the upward movement force of the driving shaft 3 is converted into the leftward movement force of the driven shaft 6 (taking the figure 1 as a reference), and the driven shaft 6 is connected with an XY connecting piece 7, so that the movement of clamping fingers on the upper end surface of the cylinder body 1 is realized.

In one embodiment of the present application, the number of the driving shafts 3 and the driven shafts 6 is two, and the two driven shafts are vertically distributed.

Further, in order to realize air-break reset and reduce the impact force between the driven shaft 6 and the cylinder body, the spring 2 is further arranged at the bottom of the driven shaft 6, and has the functions of buffering and flexible landing when clamping a workpiece, and the reset is assisted when opening.

Further, in order to improve the precision, referring to fig. 5, the driven shaft 6 is further provided with an anti-rotation section 63 and an anti-rotation sleeve 4 matched with the anti-rotation section, so that the driven shaft 6 does not rotate when moving, the anti-rotation sleeve 4 is matched with the driven shaft 6 in a high-precision manner, the clamping precision is ensured, and the area of a limited space is maximized due to the special anti-rotation sleeve structure;

referring to fig. 5, the main structure of the anti-rotation sleeve 4 is in a square ring shape, the outer corners are in round corner transition, the round corners can reduce stress compared with corner pairs, the anti-rotation sleeve is safer for human bodies, products are easier to assemble in industrial production, and the anti-rotation section 63 is in contact with the inner side surface of the square ring, so that the effect of preventing rotation is achieved;

referring to fig. 6, the anti-rotation sleeve 4 is provided with an anti-rotation limiting portion 4A, which mainly functions to increase the contact area with the anti-rotation section 63, further enhance the anti-rotation performance, and also can play a limiting role to limit the stroke of the driving shaft 3 and avoid excessive movement.

It can be seen that spring 2 can cushion and reset action, and anti-rotating structure can effectively improve and press from both sides tight precision, and the rotating-proof sleeve 4 adds a stopper for square annular body, and the adjacent both sides junction of square is the fillet, for fillet rectangle's ring, effectively reduces stress, improves the antifatigue characteristic of product.

Further, in order to eliminate the influence of dust and prevent dust from entering the cylinder, referring to fig. 3 and 7, a dust scraping sleeve 5 is further installed between the driven shaft 6 and the inner wall of the cylinder; the dust scraping sleeve 5 is positioned in the cylinder body 1, the outer side of the dust scraping sleeve 5 is square, the inner side of the dust scraping sleeve is round, and the outer corners of the dust scraping sleeve are in round corner transition; the driven shaft 6 can move relatively to the dust scraping sleeve 5 and is hermetically connected with the dust scraping sleeve 5; the sliding fit clearance between the driven shaft 6 and the dust scraping sleeve 5 is 0.005mm, and the dust scraping effect is good;

further, the dust scraping sleeve 5 is provided with a square annular groove, a static sealing ring 13 is arranged in the groove, and the groove is hermetically connected with the inner cavity of the cylinder body 1 through the static sealing ring 13;

further, in order to enhance the air tightness, referring to fig. 4 and 7, the driven shaft 6 is provided with an annular groove, and the annular groove is provided with a movable protective sealing ring 12, so that the driven shaft 6 can be prevented from being influenced by dust when moving in the cylinder body.

The XY connecting piece 7 is connected with the driven shaft 6 through a countersunk head screw, and a threaded sealing gasket 11 is further arranged in a connecting hole of the countersunk head screw and the driven shaft 6.

The thread sealing gasket 11 is in a ring shape, is sleeved on a screw and is filled, and is equivalent to a gasket, so that the phenomena of stress, deformation and tearing caused by the contact of two metal surfaces are prevented.

It can be seen that the dust scraping sleeve 5 and the movable protective sealing element 12 are used, so that impurities at the shaft end can be cleaned in time, adhesion solidification is avoided, and precision reduction caused by influence of dust factors is avoided. The dust scraping sleeve 5 is adopted and simultaneously assists a sealing piece to ensure that the protection grade is more than IP 65.

In order to realize the air-cut-off reset function, the air-cut-off reset is controlled by an air control valve with closed middle position, and the middle position is kept.

The working principle is as follows:

referring to fig. 2, the cylinder body 1 is provided with an air hole a and an air hole B, and the product controls the port a and the port B through 1 middle-position closing air control valve. In a natural state, the cylinder is in an open state; the port B is used for air inlet, the piston 8 drives the driving shaft 3 and the driven shaft 6, and the XY connecting piece clamping state is realized; the port A is filled with air, the piston 8 retracts, the driven shaft 6 is reset, and the driven shaft is in an open state.

The implementation mode of synchronism is as follows: the cavities on the body are connected through process air holes with equal volumes at equal intervals, so that the passing time of the driving gas is consistent.

Driving force: the driving area can be maximized by designing the driving cavity in the Z axis, the driving force is converted into an X axis and a Y axis in an equal ratio through the wedge surface of 45 degrees, and the clamping force is maximized.

Positioning accuracy: in the clamping state, the redundancy exists at the tail end of the piston separating stroke, the wedge-shaped surface always keeps plane contact, in addition, the sliding fit clearance between the anti-rotation sleeve 4 and the driven shaft 6 is only 0.005mm, and the deflection precision is high.

Sealing property: it can be seen from the above embodiments that all interfaces with leakage adopt sealing measures, the sliding fit clearance between the driven shaft 6 and the dust scraping sleeve 5 is only 0.005mm, the dust scraping function is achieved, and meanwhile, the auxiliary dynamic sealing element is used for assisting, and the protection grade is above IP 65.

And (3) keeping the air supply off: the pneumatic control valve with closed middle position is adopted for controlling, the air-cut-off reset function is realized when the air is cut off emergently, and the middle position is kept.

Compared with the prior art, the beneficial effect that this application of implementation brought is:

Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that various changes in the embodiments and/or modifications of the embodiments and/or portions thereof may be made, and all changes, equivalents and improvements that fall within the spirit and scope of the present application are desired to be protected by the present application.

Claims

1. Accurate 3C processing safety centre gripping orientation module, its characterized in that, including driving shaft (3), driven shaft (6) and rotating-proof sleeve (4), driving shaft (3) and driven shaft (6) are connected through wedge mechanism, driving shaft (3) are provided with the first inclined plane of driving shaft (31), driven shaft (6) are provided with the first inclined plane of driven shaft (61), prevent changeing tangent plane (63), install rotating-proof sleeve (4) on driven shaft (6), rotating-proof sleeve (4) medial surface with prevent changeing tangent plane (63) sliding contact.

2. The precision 3C machining safety clamping and positioning module according to claim 1, wherein the anti-rotation sleeve (4) is further provided with an anti-rotation limiting part (4A) for increasing the contact area with the tangent plane.

3. The precision 3C processing safety clamping and positioning module according to claim 2, wherein a dust scraping sleeve (5) is further installed between the driven shaft (6) and the inner wall of the cylinder body.

4. Precision 3C machining safety clamp positioning module according to claim 3, characterized in that the dust scraping sleeve (5) is provided with a groove in which a static sealing ring (13) is mounted.

5. Precision 3C machining safety clamping and positioning module according to claim 4, characterized in that the driven shaft (6) is provided with an annular groove fitted with a dynamic protection seal (12).

6. The precision 3C machining safety clamping and positioning module according to claim 5, is characterized in that a spring (2) for buffering and resetting is further arranged at the bottom of the driven shaft (6).

7. The precision 3C machining safety clamping and positioning module according to claim 6, is characterized in that the lower end of the driving shaft (3) is a stepped shaft, and a buffer ring is installed on the thin shaft part of the stepped shaft.

8. The precision 3C machining safety clamp positioning module according to claim 7, characterized in that the number of the driving shaft (3) and the driven shaft (6) is two respectively.

9. Precision 3C machining safety clamp positioning module according to claim 8, characterized in that two driven shafts (6) are distributed vertically.

10. The precision 3C machining safety clamping and positioning module according to claim 3, characterized in that the anti-rotation sleeve (4) is externally square-ring-shaped.