CN109702525B

CN109702525B - Fixing device

Info

Publication number: CN109702525B
Application number: CN201711016017.6A
Authority: CN
Inventors: 王维; 郭亮; 康杰梅; 程波; 薛海河
Original assignee: Fuding Electronic Technology Jiashan Co Ltd
Current assignee: Fuding Electronic Technology Jiashan Co Ltd
Priority date: 2017-10-25
Filing date: 2017-10-25
Publication date: 2021-09-28
Anticipated expiration: 2037-10-25
Also published as: CN109702525A

Abstract

The invention provides a fixing device, which is used for fixing a workpiece with at least one through hole and comprises a base, at least one pressing mechanism and a driving mechanism, wherein the base is provided with at least one accommodating hole and at least one vent hole, each vent hole is communicated with the corresponding accommodating hole, each pressing mechanism comprises a piston rod, a piston, a pressing piece, an elastic piece and a connecting rod, two sides of the piston rod are respectively provided with a limiting surface, when the workpiece is fixed, the pressing piece penetrates through the corresponding through hole of the workpiece, the driving mechanism drives the connecting rod to move so as to drive the piston rod to rotate and drive the pressing piece to rotate for a certain angle, gas is introduced into the corresponding accommodating hole through each vent hole so as to drive the piston rod to move so as to drive the pressing piece to move so as to press and fix the workpiece, when the workpiece is released, the gas in each accommodating hole is released through the corresponding vent hole, the piston drives the pressing piece to move away from the workpiece through the elastic restoring force of the elastic piece so as to release the workpiece.

Description

Fixing device

Technical Field

The invention relates to a fixing device, in particular to a fixing device for automatically pressing and fixing a workpiece.

Background

When a shell of the notebook computer is processed with a keyboard hole by utilizing the CNC machine, the shell needs to be fixed on a fixed jig, and the height design of the fixed jig needs to be very low for ensuring the processing stroke and the processing area of the CNC machine. Meanwhile, the existing fixing jig only utilizes the vacuum chuck to adsorb the fixed shell, so that the shell is easy to loosen, and the processing precision of the shell is influenced.

Disclosure of Invention

In view of the above, it is necessary to provide a fixing device which is stable in fixing and convenient to clamp.

A fixing device is used for fixing a workpiece with at least one through hole, and comprises a base and at least one pressing mechanism, and further comprises a driving mechanism arranged on the base, wherein at least one accommodating hole and at least one vent hole are formed in the base, each vent hole is communicated with the corresponding accommodating hole, each pressing mechanism comprises a piston rod, a piston, a pressing piece, an elastic piece and a connecting rod, limiting surfaces are respectively formed on two sides of the piston rod, one end of a plug rod penetrates through the corresponding accommodating hole in a sliding mode and protrudes out of the base, the piston is arranged on the piston rod and is accommodated in the corresponding accommodating hole, the pressing piece is arranged at one end, protruding out of the base, of the piston rod, the elastic piece is sleeved on the piston rod, and one end of the connecting rod is provided with a limiting hole in a penetrating mode so as to penetrate through one end, provided with the limiting surface, of the piston rod, the end, far away from the piston rod, of the connecting rod extends out of the containing hole and is connected with the driving mechanism, two ends of the elastic piece respectively abut against the piston and the connecting rod, when the workpiece is fixed, the pressing piece penetrates through the through hole corresponding to the workpiece, the driving mechanism drives the connecting rod to move so as to drive the piston rod to rotate and drive the pressing piece to rotate for a certain angle, gas is introduced into the corresponding containing hole through each vent hole so as to drive the piston to move and drive the piston rod to move, so that the pressing piece is driven to move so as to press and fix the workpiece, when the workpiece is released, the gas in each containing hole is released through the corresponding vent hole, and the piston drives the pressing piece to move far away from the workpiece through the elastic restoring force of the elastic piece so as to release the workpiece.

According to the fixing device, the connecting rod is arranged on the piston rod of each pressing mechanism, the driving mechanism drives the connecting rod of each pressing mechanism simultaneously to drive the piston rod to rotate so as to drive the pressing piece to rotate, and meanwhile, the piston is matched with the elastic piece to drive the piston rod to move so that the pressing piece presses and fixes or releases the workpiece, so that the clamping efficiency of the workpiece is improved.

Drawings

Fig. 1 is a perspective view of a fixing device according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the fastening device of fig. 1 from another perspective.

FIG. 3 is a perspective view of the base of the fixture of FIG. 1 from another perspective.

Fig. 4 is a perspective view of the piston rod, the piston and the elastic member of the fixing device shown in fig. 2.

Fig. 5 is a schematic cross-sectional view of the fastening device of fig. 1 taken along line V-V.

Description of the main elements

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.

It will be understood that when an element or component is referred to as being "connected" to another element or component, it can be directly connected to the other element or component or intervening elements or components may also be present. When an element or component is referred to as being "disposed on" another element or component, it can be directly on the other element or component or intervening elements or components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present invention provides a fixing device 100 capable of pressing and fixing a workpiece 200. The fixing device 100 includes a base 10, at least one pressing mechanism 20, and a driving mechanism 30. The base 10 is used to be mounted on a processing apparatus (not shown) to process the workpiece 200 fixed on the fixture 100. At least one pressing mechanism 20 is provided on the base 10 to fix or release the workpiece 200. The driving mechanism 30 is disposed on the base 10 to drive the at least one pressing mechanism 20 to rotate. In this embodiment, the workpiece 200 is substantially rectangular plate-shaped, at least one through hole 210 and at least one positioning hole 220 are formed through the workpiece 200, and the number of the pressing mechanisms 20 is two, but not limited thereto.

Referring to fig. 2 and 3, the base 10 is substantially rectangular and includes a first surface 11 and a second surface 12 opposite to the first surface 11. The first surface 11 is used for carrying the workpiece 200. The base 10 is formed with a guide groove 13, a fixing groove 14, at least one receiving hole 15 and at least one vent hole 16. The guide groove 13 is opened on the second surface 12 and penetrates one end of the base 10. The fixing groove 14 is opened on the second surface 12 and communicates with the guide groove 13.

Each receiving hole 15 extends through the first surface 11 and the second surface 12. In this embodiment, each receiving hole 15 is a stepped hole, and includes a first receiving hole 151, a second receiving hole 152, and a third receiving hole 153. The first receiving hole 151, the second receiving hole 152 and the third receiving hole 153 are coaxially and sequentially communicated. The first receiving hole 151 has a larger diameter than the second receiving hole 152. The diameter of the second receiving hole 152 is larger than that of the third receiving hole 153. The first receiving hole 151 penetrates the second surface 12. The first receiving hole 151 of each receiving hole 15 communicates with the guide groove 13. The third receiving hole 153 penetrates the first surface 11. At least one vent hole 16 extends in a direction perpendicular to the axis of the receiving hole 15 and penetrates one side of the base 10. Each of the air vent holes 16 communicates with the second receiving hole 152 of the corresponding receiving hole 15 to facilitate ventilation into the second receiving hole 152. Each of the air holes 16 is connected to a gas supply device (not shown) to supply gas to the second receiving hole 152 of the corresponding receiving hole 15. In this embodiment, the number of the receiving holes 15 and the number of the vent holes 16 are two, the two receiving holes 15 are located on the same side of the guide groove 13, and the fixing groove 14 is located between the two receiving holes 15, but the invention is not limited thereto.

Referring to fig. 1 again, in the present embodiment, the first surface 11 of the base 10 is further provided with at least one positioning pin 17. The locating pins 17 can pass through corresponding locating holes 220 in the workpiece 200 to locate the workpiece 200.

Referring to fig. 2 to 5, each pressing mechanism 20 includes a piston rod 21, a piston 22, a pressing member 23, a supporting member 24, an elastic member 25, an end cap 26, a connecting rod 27 and a pushing pin 28. The piston rod 21 is substantially cylindrical rod-shaped. As shown in fig. 4, the piston rod 21 is provided with a stopper surface 211 at each of its two sides. The two limiting surfaces 211 are parallel to each other and close to one end of the piston rod 21. One end of the piston rod 21 slidably passes through the third receiving hole 153 of the corresponding receiving hole 15 and protrudes out of the first surface 11. The piston 22 is provided on the piston rod 21 and is located at a substantially central position of the piston rod 21. The pistons 22 are slidably received in the second receiving holes 152 of the corresponding receiving holes 15. The pressing member 23 is disposed at one end of the piston rod 21 protruding from the first surface 11. The support 24 is generally disc-shaped. The supporting member 24 is disposed in the first receiving hole 151 of the corresponding receiving hole 15, and a first through hole 241 is formed through a substantially central position of the supporting member 24 so as to facilitate the end of the piston rod 21 having the limiting surface 211 to pass through. The elastic member 25 is disposed on the piston rod 21 and two ends thereof respectively abut against the piston 22 and the supporting member 24 to provide an elastic restoring force for the movement of the piston 22. The end cap 26 is generally circular. The end cap 26 covers the opening of the first receiving hole 151 of the corresponding receiving hole 15. A second through hole 261 is formed through the end cap 26 at a substantially central position so that the end of the piston rod 21 having the stopper surface 211 can pass through.

The link 27 has a substantially elongated plate shape. The connecting rod 27 is provided with a limiting hole 271. The limit hole 271 is near one end of the link 27. The limiting hole 271 is a rectangular hole to receive one end of the piston rod 21 having the limiting surface 211. One end of the link 27 having the stopper hole 271 is located between the support 24 and the end cap 26 and one end of the link 27 remote from the piston rod 21 is extended into the guide groove 13. A push pin 28 is provided at an end of the link rod 27 remote from the piston rod 21 and facing the guide groove 13. Two side walls (not labeled) of the limiting hole 271 can be slidably engaged with the two limiting surfaces 211 of the piston rod 21 so that the connecting rod 27 drives the piston rod 21 to rotate.

In this embodiment, a limit boss 242 is disposed on a side of the support member 24 away from the piston 22. The limit boss 242 is substantially arc-shaped and extends around the first through hole 241 to limit the rotation range of the corresponding link 27.

The driving mechanism 30 includes a driving member 31, a pushing member 32, a limiting member 33, and a guiding member 34. The driving member 31 is disposed at one end of the base 10 and partially extends into the guide groove 13. The pusher 32 is generally in the form of an elongated plate. The pushing member 32 is slidably disposed in the guide groove 13 and connected to the driving member 31. The pushing member 32 reciprocates along the guide groove 13 by the driving member 31. The side of the pushing member 32 facing the second surface 12 is provided with at least one pushing groove 321. Each push slot 321 is adapted to receive an end of a push pin 28 remote from the link 27. The stopper 33 is substantially in the form of a long plate. The limiting piece 33 is partially accommodated in the fixing groove 14 and is positioned on the pushing piece 32. At least one limiting opening 331 is formed through the limiting member 33. Each of the limit openings 331 corresponds one-to-one to each of the push slots 321 to limit the movement of the push pins 28. The guide 34 has a substantially rectangular parallelepiped shape. The guide member 34 has a guide groove 341 formed therein. The guide grooves 341 penetrate opposite ends of the guide member 34. The guide 34 is received in the guide groove 13 and an output shaft (not labeled) of the driver 31 passes through the guide groove 341. In this embodiment, the driving member 31 is a linear cylinder, but is not limited thereto, and in other embodiments, the driving member 31 may be other linear actuators, which do not affect the driving member 31 to drive the pushing member 32 to reciprocate.

Referring to fig. 1 to 5, during assembly, one end of the piston rod 21 of each pressing mechanism 20 slidably passes through the third receiving hole 153 of the corresponding receiving hole 15 and protrudes out of the first surface 11, and the piston 22 is disposed on the piston rod 21 and slidably received in the second receiving hole 152 of the corresponding receiving hole 15. The pressing member 23 is disposed at one end of the piston rod 21 protruding from the first surface 11, and the elastic member 25 is sleeved on the piston rod 21. The supporting member 24 is disposed in the first receiving hole 151 of the corresponding receiving hole 15 and abuts against one end of the elastic member 25, and one end of the connecting rod 27 is sleeved on one end of the piston rod 21 having the limiting surface 211 through the limiting hole 271. The end caps 26 are sealed to the openings of the first receiving holes 151 of the corresponding receiving holes 15. The driving member 31 is disposed at one end of the base 10 and partially extends into the guide groove 13, and the pushing member 32 is slidably disposed in the guide groove 13 and connected to the driving member 31. The stopper 33 is partially received in the fixing groove 14, the guide 34 is received in the guide groove 13, and the output shaft (not shown) of the driving member 31 passes through the guide groove 341. The pushing pin 28 of each pressing mechanism 20 is disposed at an end of the connecting rod 27 far from the piston rod 21 and an end of the pushing pin 28 far from the connecting rod 27 is received in the corresponding pushing groove 321, completing the assembly of the whole fixing device 100.

When the workpiece 200 is fixed, the pressing members 23 pass through the corresponding through holes 210 of the workpiece 200 so that the workpiece 200 is placed on the first surface 11. The driving member 31 drives the pushing member 32 to make the pushing groove 321 pull the pushing pin 28 to move, thereby moving the connecting rod 27. The connecting rod 27 is matched with the two limiting surfaces 211 of the piston rod 21 through the limiting hole 271 so as to drive the piston rod 21 to rotate, and therefore the pressing piece 23 is driven to rotate for a certain angle. Gas is introduced into the corresponding accommodating hole 15 through each vent hole 16 to drive the piston 22 to move so as to drive the piston rod 21 to move, and therefore the pressing piece 23 is driven to move so as to press and fix the workpiece 200. When the workpiece 200 is released, the gas in each receiving hole 15 is released through the corresponding vent hole 16, and the piston 22 drives the pressing member 23 to move away from the workpiece 200 by the elastic restoring force of the elastic member 25, so that the workpiece 200 is released. The driving member 31 drives the pushing member 32 again to rotate the pressing member 23 in a reverse direction by a certain angle, so that the workpiece 200 and thus the first surface 11 can be smoothly removed.

Each pressing mechanism 20 includes a piston rod 21, a piston 22, a pressing member 23, a supporting member 24, an elastic member 25, an end cap 26, a connecting rod 27 and a pushing pin 28, but not limited thereto, in other embodiments, the supporting member 24, the end cap 26 and the pushing pin 28 may be eliminated, one end of the elastic member 25 directly abuts against the connecting rod 27, one end of the connecting rod 27 is directly pivoted with a pushing member 32 of the driving mechanism 30, and the elastic member 25 does not provide an elastic restoring force for the movement of the piston 22, and the driving mechanism 30 drives the connecting rod 27 to rotate the piston rod 21.

The driving mechanism 30 includes a driving member 31, a pushing member 32, a limiting member 33 and a guiding member 34, but not limited thereto, in other embodiments, the limiting member 33 and the guiding member 34 may be eliminated without affecting the rotation of the driving member 31 to push the piston rod 21 via the pushing member 32.

The fixing device 100 is provided with the connecting rod 27 on the piston rod 21 of each pressing mechanism 20, and the driving mechanism 30 simultaneously drives the connecting rod 27 of each pressing mechanism 20 to drive the piston rod 21 to rotate so as to drive the pressing piece 23 to rotate, and simultaneously the piston 22 cooperates with the elastic piece 25 to drive the piston rod 21 to move so as to enable the pressing piece 23 to press and fix or release the workpiece 200, thereby improving the clamping efficiency of the workpiece 200.

In addition, other modifications within the spirit of the invention may occur to those skilled in the art, and such modifications are, of course, included within the scope of the invention as claimed.

Claims

1. A fixing device is used for fixing a workpiece with at least one through hole, and comprises a base and at least one pressing mechanism, and is characterized in that: the fixing device also comprises a driving mechanism arranged on the base, the base is provided with at least one accommodating hole and at least one vent hole, each vent hole is communicated with the corresponding accommodating hole, each pressing mechanism comprises a piston rod, a piston, a pressing piece, an elastic piece and a connecting rod, two sides of the piston rod are respectively provided with a limiting surface, two limiting surfaces are parallel to each other and close to one end of the piston rod, one end of the piston rod penetrates through the corresponding accommodating hole in a sliding manner and protrudes out of the base, the piston is arranged on the piston rod and is accommodated in the corresponding accommodating hole, the pressing piece is arranged at one end of the piston rod protruding out of the base, the elastic piece is sleeved on the piston rod, one end of the connecting rod penetrates through the limiting hole to penetrate through one end of the piston rod, which is provided with the limiting surface, one end of the connecting rod, which is far away from the piston rod, extends out of the accommodating hole and is connected with the driving mechanism, when the workpiece is fixed, the pressing piece penetrates through the through hole corresponding to the workpiece, the driving mechanism drives the connecting rod to move so as to drive the piston rod to rotate and drive the pressing piece to rotate for a certain angle, gas is introduced into the corresponding accommodating hole through each vent hole so as to drive the piston to move and drive the piston rod to move, so that the pressing piece is driven to move so as to press and fix the workpiece, when the workpiece is released, the gas in each accommodating hole is released through the corresponding vent hole, and the piston drives the pressing piece to move away from the workpiece through the elastic restoring force of the elastic piece so as to release the workpiece; the base comprises a first surface and a second surface opposite to the first surface, the first surface is used for bearing the workpiece, and each accommodating hole penetrates through the first surface and the second surface; each receiving hole comprises a first receiving hole, a second receiving hole and a third receiving hole, the first receiving hole, the second receiving hole and the third receiving hole are sequentially communicated and coaxial, the first receiving hole penetrates through the second surface, the third receiving hole penetrates through the first surface, at least one vent hole extends along the direction perpendicular to the axis of the receiving holes and penetrates through one side of the base, each vent hole is communicated with the corresponding second receiving hole, one end of the piston rod penetrates through the corresponding third receiving hole in a sliding mode and protrudes out of the first surface, and the piston is received in the corresponding second receiving hole in a sliding mode; each pressing mechanism further comprises a supporting piece, the supporting piece is arranged in the corresponding first accommodating hole, a first penetrating hole is formed in the center of the supporting piece in a penetrating mode so that one end, provided with the limiting surface, of the piston rod can penetrate through the supporting piece, and two ends of the elastic piece respectively abut against the piston and the supporting piece; a limiting boss is arranged on one side of the supporting piece, which is far away from the piston, is arc-shaped and extends around the first through hole to limit the corresponding rotation range of the connecting rod; the base is further provided with a guide groove, a first accommodating hole of each accommodating hole is communicated with the guide groove, each pressing mechanism further comprises a pushing pin, the pushing pin is arranged at one end, far away from the piston rod, of the connecting rod and faces the guide groove, each driving mechanism comprises a driving piece and a pushing piece, the driving piece is arranged at one end of the base and partially extends into the guide groove, the pushing piece is slidably arranged in the guide groove and is connected with the driving piece, the pushing piece reciprocates along the guide groove under the driving of the driving piece, one side, facing the second surface, of each pushing piece is provided with at least one pushing groove, and each pushing groove is used for accommodating one end, far away from the connecting rod, of the pushing pin; the base is further provided with a fixed groove, the driving mechanism further comprises a limiting part, the limiting part is partially contained in the fixed groove and located on the pushing part, at least one limiting opening is formed in the limiting part in a penetrating mode, and each limiting opening corresponds to each pushing groove one to one so as to limit movement of the pushing pin.

2. The fixture of claim 1, wherein: the aperture of the first containing hole is larger than that of the second containing hole, and the aperture of the second containing hole is larger than that of the third containing hole.

3. The fixture of claim 1, wherein: the driving mechanism further comprises a guide piece, wherein the guide piece is provided with a guide groove, the guide groove penetrates through two opposite ends of the guide piece, the guide piece is contained in the guide groove, and the output shaft of the driving piece penetrates through the guide groove.

4. The fixture of claim 1, wherein: each pressing mechanism further comprises an end cover, the end cover is covered on the opening of the corresponding first accommodating hole, a second penetrating hole is formed in the center of the end cover in a penetrating mode so that the end, provided with the limiting face, of the piston rod can penetrate through the end, and the end, provided with the limiting hole, of the connecting rod is located between the supporting piece and the end cover.

5. The fixture of claim 1, wherein: the driving member is a linear cylinder.