CN210436006U

CN210436006U - Small-size clamping device

Info

Publication number: CN210436006U
Application number: CN201921068151.5U
Authority: CN
Inventors: 王真立
Original assignee: Chongqing Hengtuogao Automation Technology Co ltd
Current assignee: Chongqing Hengtuogao Automation Technology Co ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-05-01
Anticipated expiration: 2029-07-09

Abstract

The utility model discloses a small-size clamping device, which comprises a housin, the casing includes fixed connection's last casing and lower casing, it has the centre gripping arm to go up to articulate on the casing, the internal piston rod that is equipped with of inferior valve, be equipped with the connection piece in the upper shell, the both ends of connection piece respectively with the centre gripping arm with the piston rod is articulated, be equipped with the elastic steel piece in the upper shell, and configure into: when the clamping arms are in the clamping position, the connecting piece is pressed by the clamping arms and is embedded into the elastic steel sheet. Compared with the prior art, the utility model discloses, can realize the locking to the centre gripping arm through elastic steel sheet, when the work piece is pressed from both sides tightly, the length direction transmission of connection piece can be followed to the ascending power of centre gripping face of perpendicular centre gripping arm to compress tightly elastic steel sheet, realize the rigidity locking from this, have stronger interference killing feature, in addition, the utility model discloses still have simple structure, be convenient for maintain, characteristics that the centre gripping is effectual.

Description

Small-size clamping device

Technical Field

The utility model relates to the field of mechanical equipment, concretely relates to small-size clamping device.

Background

In some frock clamp designs, can need to use some clampers to realize the clamp of work piece usually, especially in some small-size frocks, it is higher to space and weight requirement, present traditional clampers mainly realize the clamping function to the work piece through some pull rod formula cylinders with some nonstandard link mechanism, this kind of design occupation space is big, the non-modular design, spare part is many and do not have unified standard, it is loaded down with trivial details easily to cause the design, nonstandard spare part quantity is more, increase user spare part pressure, and difficult installation and debugging, the connecting piece is easy to wear and tear not hard up after long-term the use, need frequent maintenance, greatly increased the maintenance cost.

In addition, in the current anchor clamps, the cylinder can't realize the auto-lock alone, if adopt the auto-lock cylinder then increase the cost, can't realize the rigidity locking, exert pressure to the work piece through the cylinder, when work piece processing produced the pressure fluctuation, can cause certain not hard up, influence the machining precision of work piece.

In view of this, it is urgently needed to improve the existing tooling clamp, and solve the problems of complex structure, high maintenance cost and incapability of realizing rigid locking.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the structure that current frock clamp exists is complicated, the maintenance cost is high and can't realize the problem of rigidity locking.

In order to solve the technical problem, the utility model provides a small-size clamping device, which comprises a housin, the casing includes fixed connection's last casing and lower casing, it has the centre gripping arm to go up to articulate on the casing, the internal piston rod that is equipped with of inferior valve, be equipped with the connection piece in the last casing, the both ends of connection piece respectively with the centre gripping arm with the piston rod is articulated, be equipped with the elastic steel piece in the upper casing, and configure into: when the clamping arms are in the clamping position, the connecting piece is pressed by the clamping arms and is embedded into the elastic steel sheet.

In the above scheme, a groove is formed in the position, opposite to the connecting piece, far away from the clamping arm on the inner wall of the upper shell, and the elastic steel sheet is U-shaped and is arranged in the groove with an outward opening.

In the above scheme, the clamping arm is hinged to the upper shell through a first pin, and two ends of the connecting piece are hinged to the piston rod and the clamping arm through a second pin and a third pin respectively.

In the above scheme, the upper shell comprises two vertical plates which are parallel and are arranged oppositely, sliding grooves are vertically and oppositely arranged on the inner side surfaces of the two vertical plates, two ends of the second pin penetrate through the piston rod and the connecting piece respectively, and are sleeved with needle roller bearings, and the needle roller bearings are movably arranged in the sliding grooves.

In the above scheme, a cylindrical cavity is integrally formed in the lower shell, an upper opening and a lower opening which are communicated with the cylindrical cavity are respectively arranged at the upper end and the lower end of the lower shell, the piston rod is arranged in the upper opening in a penetrating manner, a first sealing ring is arranged at the upper opening, a lower cover is arranged at the lower opening, and a second sealing ring and a third sealing ring are respectively arranged on the outer peripheral surfaces of the upper portion and the lower portion of the lower cover.

In the above scheme, an annular air guide groove is formed in the peripheral surface of the lower cover, and an air guide hole penetrating through the top surface of the lower cover and communicated with the air guide groove is formed in the lower cover.

In the above scheme, the upper part and the lower part of the lower shell are respectively provided with an upper air guide hole and a lower air guide hole, the upper air guide hole is communicated with the cylindrical cavity, and the lower air guide hole is communicated with the air guide groove.

In the above scheme, a piston is arranged in the cylindrical cavity, the piston is sleeved on the piston rod, an inner sealing ring is arranged on the inner side surface of the piston, and an outer sealing ring is arranged on the outer peripheral surface of the piston.

In the above scheme, the piston rod is provided with a nut for fixing the piston, and a magnet is fixed on the nut.

In the above scheme, the sliding groove is a through groove penetrating through the vertical plate, and a partition plate is arranged in the through groove.

Compared with the prior art, the utility model discloses, can realize the locking to the centre gripping arm through elastic steel sheet, when the work piece is pressed from both sides tightly, the length direction transmission of connection piece can be followed to the ascending power of centre gripping face of perpendicular centre gripping arm to compress tightly elastic steel sheet, realize the rigidity locking from this, have stronger interference killing feature, in addition, the utility model discloses still have simple structure, be convenient for maintain, characteristics that the centre gripping is effectual.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention;

fig. 2 is a longitudinal sectional view of the present invention;

fig. 3 is a schematic structural view of the housing of the present invention;

fig. 4 is a side view of the housing of the present invention;

fig. 5 is a schematic structural view of the middle clamping assembly of the present invention.

Detailed Description

The utility model provides a small-size clamping device can realize the locking to the centre gripping arm through the elastic steel piece, when the work piece is pressed from both sides tightly, the length direction transmission of connection piece can be followed to the ascending power of centre gripping face of perpendicular centre gripping arm to compress tightly the elastic steel piece, realize the rigidity locking from this, have stronger interference killing feature, in addition, the utility model discloses still have simple structure, be convenient for maintain, the effectual characteristics of centre gripping. The invention is described in detail below with reference to the drawings and the detailed description.

As shown in figures 1-5, the utility model provides a small-size clamping device, including casing and centre gripping subassembly, be equipped with power component in the casing for drive centre gripping subassembly and realize clamping function.

The casing includes fixed connection's last casing 10 and casing 20 down, goes up to articulate on the casing 10 and is equipped with piston rod 21 in the casing 20 under 11 with the centre gripping arm, goes up and is equipped with connection piece 12 in the casing 10, and the both ends of connection piece 12 are articulated with centre gripping arm 11 and piston rod 21 respectively, and when piston rod 21 reciprocated, drive centre gripping arm 11 through connection piece 12 and rotate along the pin joint, realize its clamping function from this.

The upper shell 10 is provided with an elastic steel sheet 13 inside, and is configured as follows: when the clamping arm 11 is in the clamping position, the connecting piece 12 is in the horizontal position and is embedded into the elastic steel sheet 13, at the moment, two ends of the connecting piece 12 are respectively pressed by the elastic steel sheet 13 and the clamping arm 11, and when the angle is proper, the upward force of the clamping surface of the vertical clamping arm 11 can be transmitted along the length direction of the connecting piece 12 and presses the elastic steel sheet 13, so that rigid locking is realized, and the anti-interference capacity is high. Preferably, the clamping arm 11 is provided with an arc surface at the hinged position of the connecting piece, when a workpiece is clamped tightly, the arc surface compresses the connecting piece 12, so that the force transmission is facilitated, and the end part of the connecting piece 12 close to the elastic steel sheet 13 is the arc surface, so that the elastic steel sheet 13 can be conveniently embedded and separated, thereby realizing the locking and unlocking of the clamping arm 11, namely the locking and unlocking of the clamping arm 11 to the workpiece, and the clamping arm has the advantages of simple structure and high clamping precision to the workpiece.

The utility model discloses, when centre gripping arm 11 rotated its length direction and last casing 10 perpendicularly, centre gripping arm 11's arc surface compressed tightly the one end of connection piece 12, and make in connection piece 12's the other end embedded into elastic steel sheet 13, connection piece 12 atress was balanced this moment, can not make connection piece 12 rotate under the effect of external force (the power that comes from by the 11 clamping surfaces of directional centre gripping arm of centre gripping work piece), when making centre gripping arm 11 be in horizontal position from this, realize the rigid locking, and then press from both sides tightly, the locking work piece. In order to further improve the locking effect, a groove is formed in the position, opposite to the connecting piece 12, of one side, far away from the clamping arm 11, of the inner wall of the upper shell 10, the elastic steel sheet 13 is arranged in the groove, the elastic steel sheet 13 is U-shaped, the opening of the elastic steel sheet is arranged outwards, and the connecting piece 12 can conveniently slide into and out of the groove along the elastic steel sheet 13.

Preferably, the holding arm 11 is hinged to the upper housing 10 by a first pin 14, and both ends of the connecting piece 12 are hinged to the piston rod 21 and the holding arm 11 by a second pin 15 and a third pin 16, respectively. Go up casing 10 including parallel and just to two risers 17 of setting, respectively vertical and just to being equipped with the spout on the medial surface of two risers 17, piston rod 21 and connection piece 12 are worn out respectively at the both ends of second pin 15 to the cover is equipped with bearing 18, and bearing 18 activity sets up in this spout, and when piston rod 21 reciprocated, bearing 18 slided along the spout, played spacing effect on the one hand, increased the action precision of centre gripping subassembly, and on the other hand can effectively reduce frictional wear. Preferably, the spout is the logical groove that runs through riser 17, leads to the inslot and is equipped with baffle 19 for prevent debris embedding spout, the thickness of baffle 19 is less than the degree of depth of spout, and its lateral surface and riser 17's lateral surface parallel and level.

Preferably, the vertical plates 17 are provided with mounting holes, two ends of the first pin 14 are respectively inserted into the mounting holes of the two vertical plates 17, and a bushing 171 is arranged in the mounting hole to reduce abrasion.

A cylindrical cavity is integrally formed in the lower shell 20, an upper opening and a lower opening which are communicated with the cylindrical cavity are formed in the upper end and the lower end of the lower shell 20 respectively, the piston rod 21 penetrates through the upper opening, a first sealing ring 22 is arranged at the upper opening, a lower cover 23 is arranged at the lower opening, a second sealing ring 231 is arranged on the upper portion of the lower cover 23, and a third sealing ring 232 is arranged on the lower portion of the lower cover 23. An annular air guide groove is formed in the outer peripheral surface of the lower cover 23, the air guide groove is located between the second sealing ring 231 and the third sealing ring 232, and an air guide hole penetrating through the top surface of the lower cover 23 and communicated with the air guide groove is formed in the lower cover 23. The upper part and the lower part of the lower shell 20 are respectively provided with an upper air guide hole 201 and a lower air guide hole 202, the upper air guide hole 201 is communicated with the cylindrical cavity, and the lower air guide hole 202 is communicated with the air guide groove. The piston 24 is arranged in the cylindrical cavity, the piston 24 is sleeved on the piston rod 21, the inner side face of the piston 24 is provided with an inner sealing ring 241, the outer peripheral face of the piston 24 is provided with an outer sealing ring 242, and a good sealing effect can be obtained through double sealing. The piston rod 21 is provided with a nut 25 for fixing the piston 24, the nut 25 is fixed with a magnet 26, the position of the nut 25 can be detected by matching with a sensor, the working state of the clamping assembly can be further judged, and the clamping assembly can be automatically controlled by an external system and a device.

The preferred lower casing 20 is provided with a strip-shaped groove 27 on the outer peripheral surface thereof for fixing the lower casing 20 to a designated position, and has the advantages of simple structure, convenient installation and suitability for a working environment with a narrow space.

Compared with the prior art, the utility model discloses, can realize the locking to the centre gripping arm through elastic steel sheet, when the work piece is pressed from both sides tightly, the length direction transmission of connection piece can be followed to the ascending power of centre gripping face of perpendicular centre gripping arm to compress tightly elastic steel sheet, realize the rigidity locking from this, have stronger interference killing feature, in addition the utility model discloses still have simple structure, be convenient for maintain, characteristics that the centre gripping is effectual.

The present invention is not limited to the above-mentioned best mode, and any person should learn the structural change made under the teaching of the present invention, all with the present invention has the same or similar technical solution, all fall into the protection scope of the present invention.

Claims

1. The utility model provides a small-size clamping device, includes the casing, the casing includes fixed connection's last casing and lower casing, it has the centre gripping arm to go up to articulate on the casing, the internal piston rod that is equipped with of inferior valve, its characterized in that, be equipped with the connection piece in the upper casing, the both ends of connection piece respectively with the centre gripping arm with the piston rod is articulated, be equipped with the elastic steel piece in the upper casing, and configure into: when the clamping arms are in the clamping position, the connecting piece is pressed by the clamping arms and is embedded into the elastic steel sheet.

2. The compact clamping device as claimed in claim 1, wherein the inner wall of the upper housing is provided with a groove at a position away from the clamping arm and opposite to the connecting piece, and the elastic steel piece is U-shaped and is provided with an opening facing outwards in the groove.

3. The compact clamping device as claimed in claim 1, wherein the clamping arm is hinged to the upper housing by a first pin, and both ends of the connecting piece are hinged to the piston rod and the clamping arm by a second pin and a third pin, respectively.

4. The small clamping device as claimed in claim 3, wherein the upper housing comprises two parallel vertical plates facing each other, sliding grooves are vertically and facing each other on inner side surfaces of the two vertical plates, two ends of the second pin respectively penetrate through the piston rod and the connecting piece, and are sleeved with needle bearings movably arranged in the sliding grooves.

5. The small clamping device according to claim 1, wherein a cylindrical cavity is integrally formed in the lower housing, an upper opening and a lower opening communicating with the cylindrical cavity are respectively formed at the upper end and the lower end of the lower housing, the piston rod is inserted into the upper opening, a first sealing ring is arranged at the upper opening, a lower cover is arranged at the lower opening, and a second sealing ring and a third sealing ring are respectively arranged on the outer peripheral surfaces of the upper portion and the lower portion of the lower cover.

6. The compact clamping device as claimed in claim 5, wherein the lower cover has an annular air guide groove on its outer peripheral surface, and an air guide hole penetrating the top surface of the lower cover and communicating with the air guide groove is formed in the lower cover.

7. The compact clamping device as claimed in claim 6, wherein the upper and lower portions of the lower housing are respectively provided with an upper air vent and a lower air vent, the upper air vent communicating with the cylindrical cavity, and the lower air vent communicating with the air guide groove.

8. A miniature clamping device as claimed in claim 5, wherein a piston is disposed in said cylindrical cavity, said piston being mounted on said piston rod, an inner seal ring being disposed on an inner side surface of said piston, and an outer seal ring being disposed on an outer peripheral surface of said piston.

9. The compact clamping device as recited in claim 8, wherein said piston rod is provided with a nut for fixing said piston, said nut being fixed with a magnet.

10. A mini clamp as in claim 4 wherein the channel is a channel through the riser, the channel having a partition.