CN210790625U - Clamping device for machining small workpiece - Google Patents

Abstract

The utility model discloses a clamping device for processing small-sized workpieces, which comprises a circular mounting and fixing plate and four driving devices distributed on the top surface of the mounting and fixing plate along the circle center circumference array of the mounting and fixing plate, wherein one end of the driving devices facing the central axis of the mounting and fixing plate is provided with a guide cylinder horizontally arranged, a mandril is arranged in the guide cylinder in a sliding manner, and one end of the mandril facing the central axis of the mounting and fixing plate is provided with a clamping mechanism; the clamping mechanism comprises a connecting plate and a clamping plate, a plurality of guide rods are connected between the connecting plate and the clamping plate, cavities are formed in the connecting plate corresponding to the guide rods, the guide rods are close to one ends of the connecting plate and connected with the cavities of the connecting plate in a sliding mode, and the other ends of the guide rods are connected with the clamping plate. Clamping device for small-size work piece processing have be applicable to the difference by mounting, centre gripping firm, can be applied to pivoted anchor clamps on advantage.

Description

Clamping device for machining small workpiece

Technical Field

The utility model relates to a machining technical field particularly, relates to clamping device is used in small-size work piece processing.

Background

In the existing factory or workshop, when the mechanical structure is machined, the mechanical structure is not convenient to be quickly fixed, and different mechanical structures are provided with independent corresponding clamping devices, so that the machining cost is increased; the hydraulic clamping devices are delivered to actuators in the equipment at high pressure by hydraulic pumps driven by engines or electric motors, which control the hydraulic oil to obtain the required pressure or flow by manipulating various hydraulic control valves, but they are liable to cause unbalance and vibrations of the machining equipment; and hydraulic pressure or pneumatic power's clamping device can't be applicable to in the anchor clamps that need rotate, and some holder easily appears the pine in the clamping process and takes off.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model provides a clamping device is used in small-size work piece processing has and is applicable to different advantages such as on by mounting, centre gripping firm, can be applied to pivoted anchor clamps.

In order to achieve the above object, the utility model adopts the following technical scheme: a clamping device for processing a small workpiece comprises a circular mounting and fixing plate and four driving devices distributed on the top surface of the mounting and fixing plate in an array manner along the circle center circumference of the mounting and fixing plate, wherein one ends of the four driving devices, which face to the central axis of the mounting and fixing plate, are respectively provided with a horizontally arranged guide cylinder, a push rod is arranged in the guide cylinders in a sliding manner, and one end of the push rod, which faces to the central axis of the mounting and fixing plate, is provided with a clamping mechanism; the clamping mechanism comprises a connecting plate and a clamping plate, a plurality of guide rods are connected between the connecting plate and the clamping plate, a cavity is arranged on the connecting plate corresponding to the guide rod, one end of the guide rod close to the connecting plate is connected with the cavity of the connecting plate in a sliding way, the other end of the guide rod is connected with a clamping plate, a compression spring is sleeved on the guide rod, the side surface of the clamping plate close to the central axis of the mounting and fixing plate is a curved surface, the axis of the curved surface is parallel to the central axis of the mounting and fixing plate, the curved surface of the clamping plate is provided with an elastic steel bar layer which is matched with the curved surface in size, the middle part on elastic steel strip layer is equipped with powerful magnet, elastic steel strip layer is close to be equipped with flexible contact layer on the side of the axis of installation fixed plate, the surface of contact layer is equipped with conical friction arch.

In the structure, a workpiece is placed in the middle of the mounting and fixing plate, the driving device drives the ejector rod to move towards the workpiece along the guide cylinder, the clamping mechanism is in contact with the workpiece, the contact layer is flexible, and the friction bulge on the contact layer can increase the friction force with the surface of the workpiece, so that the phenomenon that the workpiece slides is prevented; the elastic steel bar layer has good elasticity, so that the clamping mechanism can clamp and fix a workpiece to be machined, and meanwhile, the strong magnet can adsorb the workpiece to be machined, so that the workpiece is fixed more firmly; the curved surface of clamp plate can make its better tight cylindric work piece of clamp, the bellied setting of flexibility setting and friction of contact layer simultaneously, make the clamp plate can press from both sides tight cuboid or other anomalous object, through guide bar and compression spring's setting, the guide bar stretches into in the connecting plate, move to connecting plate department when making the clamp plate atress, compression spring plays the effect of a buffering simultaneously, the vibration and the unbalanced problem of processing equipment have been reduced, the clamping mechanism in four positions can play firm effect to the work piece.

Preferably, the central point of the top surface of installation fixed plate puts the circular location chamber of seting up the coaxial line, be equipped with on the inside wall in circular location chamber rather than internal diameter matched with first packing ring, the strong bottom surface center department of circular location has seted up the rectangle location chamber, the inner wall department in rectangle location chamber is equipped with size matched with second packing ring, so sets up, through the setting in circular location chamber and rectangle location chamber, makes the regular work piece can be fixed a position and tentatively fix, and first packing ring and second packing ring can play the effect of filling the gap between work piece and the location chamber, makes the work piece can be tentatively firmly fixed a position.

Preferably, a transmission case is arranged below the mounting and fixing plate, a rotating shaft is vertically and rotatably arranged at the top of the transmission case, the top end of the rotating shaft is connected with the center of the lower surface of the mounting and fixing plate, the lower end of the rotating shaft downwardly extends into the transmission case, a rotating base is arranged on the inner bottom surface of the transmission case and rotatably connected with the rotating shaft, a driving motor is arranged on one side of the transmission case, a driving shaft of the driving motor extends into the transmission case and is provided with a first driving gear, a first driven gear is arranged on the part of the rotating shaft, which is positioned in the transmission case, and is meshed with the first driven gear, so that the first driving gear on the driving motor drives the first driven gear to rotate, the rotating shaft drives the mounting and fixing plate to rotate, and the clamping device integrally rotates, the rotating base plays a role in assisting the rotating shaft to rotate and support.

Preferably, the driving device comprises a cuboid-shaped shell, a guide cylinder is arranged on one side of the shell, which faces the central axis of the installation fixing plate, the ejector rod is arranged in the guide cylinder, threaded through holes are formed in two end faces of the ejector rod along the axis, a lead screw is horizontally arranged in the shell, one end of the lead screw is positioned in the threaded through hole of the ejector rod and matched with the threaded through hole of the ejector rod, the other end of the lead screw is rotatably connected with the shell, a rotating handle is rotatably arranged on the shell, a second driving gear is arranged at one end of the rotating handle, which is positioned in the transmission case, a second driven gear is arranged on the lead screw, the second driving gear is meshed with the second driven gear, a guide block is arranged on the inner wall of the guide cylinder, a guide chute is formed in the ejector rod corresponding to the guide block, and the guide block is positioned in the guide chute and slidably, so set up, rotate the handle through manual drive, the second driving gear drives the rotation of second driven gear, and then the lead screw rotates, the ejector pin is equivalent to the nut pair with the cooperation of lead screw, the direction spout on the ejector pin plays direction limiting displacement with the guide block cooperation to the removal of ejector pin, the guide cylinder plays the effect of direction and support to the removal of ejector pin, after clamping mechanism presss from both sides tight work piece, will rotate handle locking through locking screw and fix, prevent the pine from taking off.

Preferably, the driving device is a hydraulic driving device or a pneumatic driving device, and the arrangement is such that automatic clamping of the processed workpiece is realized.

The utility model has the advantages that:

(1) the utility model ensures the stability of the fixation of the processed workpiece through the arrangement of four clamping mechanisms in four directions, the contact layer and the elastic steel bar layer can ensure that the clamping plate is more fully contacted with the processed workpiece, the friction bulge increases the contact friction force, the slipping phenomenon is prevented, and simultaneously the clamping mechanisms can be suitable for the processed workpieces with different shapes;

(2) the rotation of the workpiece to be machined is realized through the matching of the rotating mechanism and the manual clamping device, so that the workpiece to be machined can be machined conveniently;

(3) the curved surface structure of the clamping plate can adapt to cylindrical workpieces and also can be suitable for irregular structures, and the applicability of the mechanical clamping device is improved.

Drawings

Fig. 1 is a front view of embodiment 1 of the present invention;

fig. 2 is a plan view of embodiment 1 of the present invention;

FIG. 3 is an enlarged view of A in FIG. 2;

fig. 4 is a schematic structural view of a contact layer in embodiment 1 of the present invention;

fig. 5 is a front view of embodiment 2 of the present invention;

fig. 6 is a sectional view of a driving device according to embodiment 2 of the present invention;

fig. 7 is a schematic view of the internal structure of the transmission case according to embodiment 2 of the present invention.

Description of reference numerals:

1. a drive device; 2. a guide cylinder; 3. a top rod; 4. a clamping mechanism; 5. mounting a fixed plate; 6. a circular positioning cavity; 7. a first gasket; 8. a rectangular positioning cavity; 9. a second gasket; 10. a connecting plate; 11. a guide bar; 12. a compression spring; 13. a clamping plate; 14. a strong magnet; 15. a contact layer; 16. an elastic steel strip layer; 17. a friction projection; 18. a rotating shaft; 19. a transmission case; 20. a drive motor; 21. rotating the base; 22. a first drive gear; 23. a first driven gear; 24. rotating the handle; 25. a second driving gear; 26. a second driven gear; 27. a lead screw; 28. a housing; 29. a guide block; 30. a guide chute.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1:

as shown in fig. 1-4, a clamping device for processing a small workpiece includes a circular mounting and fixing plate 5 and four driving devices 1 arranged on the top surface of the mounting and fixing plate 5 in a circumferential array along the circle center of the mounting and fixing plate 5, wherein the driving devices 1 are hydraulic driving devices 1 or pneumatic driving devices 1, and the power sources of the hydraulic driving devices 1 and the pneumatic driving devices 1 are arranged outside to realize automatic clamping of a workpiece. One end of each of the four driving devices 1 facing the central axis of the mounting and fixing plate is provided with a horizontally arranged guide cylinder 2, a top rod 3 is arranged in each guide cylinder 2 in a sliding manner, and one end of each top rod 3 facing the central axis of the mounting and fixing plate is provided with a clamping mechanism 4; the clamping mechanism 4 comprises a connecting plate 10 and a clamping plate 13, a plurality of guide rods 11 are connected between the connecting plate 10 and the clamping plate 13, a cavity is formed in the connecting plate 10 corresponding to the guide rods 11, one end, close to the connecting plate 10, of each guide rod 11 is connected with the cavity of the connecting plate 10 in a sliding mode, the other end of each guide rod 11 is connected with the clamping plate 13, a compression spring 12 is sleeved on each guide rod 11, the side, close to the central axis of the installation fixing plate 5, of each clamping plate 13 is a curved surface, the axis of each curved surface is parallel to the central axis of the installation fixing plate 5, an elastic steel bar layer 16 matched with the curved surface in size is arranged on the curved surface of each clamping plate 13, a strong magnet 14 is arranged in the middle of each elastic steel bar layer 16, and a flexible contact layer 15 is arranged on the side, close to the central axis of the installation fixing plate 5, the contact layer 15 is made of soft rubber, and the surface of the contact layer 15 is provided with a conical friction bulge 17.

The central point of the top surface of the installation fixing plate 5 is provided with a circular positioning cavity 6 with a coaxial line, the inner side wall of the circular positioning cavity 6 is provided with a first gasket 7 matched with the inner diameter of the circular positioning cavity, the center of the bottom surface with strong circular positioning is provided with a rectangular positioning cavity 8, and the inner wall of the rectangular positioning cavity 8 is provided with a second gasket 9 matched with the size of the rectangular positioning cavity.

In the structure, the workpiece to be processed is placed in the circular positioning cavity 6 or the rectangular positioning cavity 8 in the middle position of the installation fixing plate 5, the regular workpiece to be processed can be positioned and preliminarily fixed through the arrangement of the circular positioning cavity 6 and the rectangular positioning cavity 8, the first gasket 7 and the second gasket 9 can play a role in filling gaps between the workpiece to be processed and the positioning cavity, and the workpiece to be processed can be preliminarily and firmly positioned. The hydraulic driving device 1 or the pneumatic driving device 1 drives the ejector rod 3 to move towards the processed workpiece along the guide cylinder 2, the clamping mechanism 4 is in contact with the processed workpiece, the contact layer 15 is flexible, and the friction bulge 17 on the contact layer can increase the friction force with the surface of the processed workpiece, so that the phenomenon that the processed workpiece slides is prevented; the elastic steel bar layer 16 has good elasticity, so that the clamping mechanism 4 can clamp and fix a workpiece to be machined, and meanwhile, the powerful magnet 14 can adsorb the workpiece to be machined, so that the workpiece is fixed more firmly; the curved surface of clamp plate 13 can make its better tight cylindric work piece of clamp, the flexible setting of contact layer 15 and the setting of friction arch 17 simultaneously, make clamp plate 13 can press from both sides tight cuboid or other anomalous object, setting through guide bar 11 and compression spring 12, guide bar 11 stretches into in the connecting plate 10, move to connecting plate 10 department when making clamp plate 13 atress, compression spring 12 plays the effect of a buffering simultaneously, the vibration and the unbalanced problem of processing equipment have been reduced, the clamping mechanism 4 in four positions can play firm effect to the work piece.

Example 2:

as shown in fig. 5-7, in this embodiment, on the basis of embodiment 1, a transmission case 19 is disposed below the mounting and fixing plate 5, a rotating shaft 18 is vertically and rotatably disposed on the top of the transmission case 19, the top end of the rotating shaft 18 is connected with the center of the lower surface of the mounting and fixing plate 5, the lower end of the rotating shaft 18 extends downward into the transmission case 19, a rotating base 21 is disposed on the inner bottom surface of the transmission case 19, the bottom of the rotating shaft 18 is arc-shaped, a groove matched with the bottom of the rotating shaft 18 is formed in the top surface of the rotating base 21, the bottom of the rotating shaft 18 rotates in the groove of the rotating base 21, the rotating base 21 is rotatably connected with the rotating shaft 18, a driving motor 20 is disposed on one side of the transmission case 19, a driving shaft of the driving motor 20 extends into the transmission case 19 and is provided with a first driving gear 22, a first driven gear 23 is, the first driving gear 22 is engaged with the first driven gear 23, the first driving gear 22 on the driving motor 20 drives the first driven gear 23 to rotate, so that the rotating shaft 18 drives the mounting and fixing plate 5 to rotate, the whole rotation of the clamping device is realized, and the rotating base 21 plays a role in assisting the rotating shaft 18 to rotate and support. The driving device 1 comprises a cuboid-shaped shell 28, a guide cylinder 2 is arranged on one side of the shell 28 facing the central axis of the installation fixing plate 5, the ejector rod 3 is arranged in the guide cylinder 2, threaded through holes are formed in two end faces of the ejector rod 3 along the axis, a lead screw 27 is horizontally arranged in the shell 28, one end of the lead screw 27 is positioned in the threaded through hole of the ejector rod 3 and matched with the threaded through hole of the ejector rod 3, the other end of the lead screw 27 is rotatably connected with the shell 28, a rotating handle 24 is rotatably arranged on the shell 28, a second driving gear 25 is arranged at one end of the rotating handle 24 positioned in the transmission box 19, a second driven gear 26 is arranged on the lead screw 27, the second driving gear 25 is meshed with the second driven gear 26, a guide block 29 is arranged on the inner wall of the guide cylinder 2, a guide chute 30 is arranged on the ejector rod 3 corresponding to the guide block 29, the guide block 29 is located in the guide sliding groove 30 and is in sliding connection with the guide sliding groove 30, the rotating handle 24 is driven to rotate manually, the second driving gear 25 drives the second driven gear 26 to rotate, the lead screw 27 rotates, the ejector rod 3 and the lead screw 27 are matched equivalently to form a nut pair, the guide sliding groove 30 on the ejector rod 3 and the guide block 29 are matched to play a role in guiding and limiting the movement of the ejector rod 3, the guide cylinder 2 plays a role in guiding and supporting the movement of the ejector rod 3, after the clamping mechanism 4 clamps a machined part, the rotating handle 24 is locked and fixed through a locking screw, and loosening is prevented.

Embodiment 2 the rest of the structure and the operation principle are the same as those of embodiment 1.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims (5)

1. A clamping device for processing a small workpiece is characterized by comprising a circular mounting and fixing plate and four driving devices distributed on the top surface of the mounting and fixing plate in an array manner along the circle center circumference of the mounting and fixing plate, wherein one ends of the four driving devices, which face to the central axis of the mounting and fixing plate, are respectively provided with a horizontally arranged guide cylinder, a push rod is arranged in the guide cylinders in a sliding manner, and one end of the push rod, which faces to the central axis of the mounting and fixing plate, is provided with a clamping mechanism; the clamping mechanism comprises a connecting plate and a clamping plate, a plurality of guide rods are connected between the connecting plate and the clamping plate, a cavity is arranged on the connecting plate corresponding to the guide rod, one end of the guide rod close to the connecting plate is connected with the cavity of the connecting plate in a sliding way, the other end of the guide rod is connected with a clamping plate, a compression spring is sleeved on the guide rod, the side surface of the clamping plate close to the central axis of the mounting and fixing plate is a curved surface, the axis of the curved surface is parallel to the central axis of the mounting and fixing plate, the curved surface of the clamping plate is provided with an elastic steel bar layer which is matched with the curved surface in size, the middle part on elastic steel strip layer is equipped with powerful magnet, elastic steel strip layer is close to be equipped with flexible contact layer on the side of the axis of installation fixed plate, the surface of contact layer is equipped with conical friction arch.

2. The clamping device for processing the small workpiece according to claim 1, wherein a coaxial circular positioning cavity is formed in the center of the top surface of the mounting and fixing plate, a first gasket matched with the inner diameter of the circular positioning cavity is arranged on the inner side wall of the circular positioning cavity, a rectangular positioning cavity is formed in the center of the bottom surface with strong circular positioning, and a second gasket matched with the rectangular positioning cavity in size is arranged on the inner wall of the rectangular positioning cavity.

3. The clamping device for small workpiece processing as claimed in claim 2, wherein a transmission box is arranged below the mounting and fixing plate, a rotating shaft is vertically arranged at the top of the transmission box in a rotating manner, the top end of the rotating shaft is connected with the center of the lower surface of the mounting and fixing plate, the lower end of the rotating shaft extends downwards into the transmission box, a rotating base is arranged on the inner bottom surface of the transmission box and is rotatably connected with the rotating shaft, a driving motor is arranged on one side of the transmission box, a driving shaft of the driving motor extends into the transmission box and is provided with a first driving gear, a first driven gear is arranged on the part of the rotating shaft, which is located in the transmission box, and the first driving gear is meshed with the first driven gear.

4. The clamping device for small workpiece processing as claimed in claim 3, wherein the driving device comprises a rectangular parallelepiped housing, a guide cylinder is disposed on one side of the housing facing the central axis of the mounting and fixing plate, the ejector rod is disposed in the guide cylinder, threaded through holes are disposed on two end faces of the ejector rod along the central axis, a lead screw is horizontally disposed in the housing, one end of the lead screw is disposed in the threaded through hole of the ejector rod and is matched with the threaded through hole of the ejector rod, the other end of the lead screw is rotatably connected with the housing, a rotating handle is rotatably disposed on the housing, a second driving gear is disposed at one end of the rotating handle disposed in the transmission case, a second driven gear is disposed on the lead screw, the second driving gear is engaged with the second driven gear, and a guide block is disposed on the inner wall of the guide cylinder, the ejector rod is provided with a guide sliding groove corresponding to the guide block, and the guide block is positioned in the guide sliding groove and is in sliding connection with the guide sliding groove.

5. The small workpiece machining clamping device of claim 2, wherein the driving device is a hydraulic driving device or a pneumatic driving device.

Images