CN212042717U

CN212042717U - Clamping device for pneumatic chuck of vertical machining center

Info

Publication number: CN212042717U
Application number: CN201922498748.XU
Authority: CN
Inventors: 李默
Original assignee: Zhejiang Haituo Huanyu Transmission Technology Co ltd
Current assignee: Zhejiang Haituo Huanyu Transmission Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-12-01
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a clamping device of a pneumatic chuck of a vertical machining center, which comprises a clamping jaw capable of moving radially, and also comprises a clamping mechanism and a double wedge block with one end connected with the clamping jaw, the other end of the double wedge block is provided with a first wedge surface and a second wedge surface which are opposite in direction, the clamping mechanism comprises a shell, a first piston disc and a second piston disc are arranged in the shell, the first piston disc is provided with a first wedge block, the first wedge block is provided with a third wedge surface corresponding to the first wedge surface, the second piston disc is provided with a second wedge block, the second wedge block is provided with a fourth wedge surface corresponding to the second wedge surface, a first air chamber is formed between the first piston disc and the second piston disc, and a second air chamber is formed between the second piston disc and the shell, the utility model can be used for clamping the outer surface of a workpiece, and also can be used for clamping the inner surface of the workpiece, high working efficiency and compact structure.

Description

Clamping device for pneumatic chuck of vertical machining center

Technical Field

The utility model belongs to the lathe chuck field, more specifically the utility model relates to a vertical machining center air chuck clamping device that says so.

Background

The pneumatic chuck pushes the clamping jaws on the chuck to fix the part by means of the piston, and compared with a manual chuck, the pneumatic chuck has the advantages of simple structure, stable and adjustable clamping force, short clamping time and the like, and the working efficiency is greatly improved. When the outer surface of the part is clamped and the inner surface of the annular part is clamped, the pneumatic chucks with two different structures are required, so that the production efficiency is reduced.

The patent document with the publication number of CN201880944U discloses a pneumatic chuck, which comprises a housing, a piston and a jaw seat fixedly arranged at the front end of the housing, wherein three chutes extending along the radial direction of the jaw seat are uniformly distributed on the jaw seat, a power wedge block with a jaw is slidably assembled in each chute, three pairs of main convex wedges are uniformly distributed at the front end of the piston along the circumferential direction, inclined grooves in sliding fit with the main convex wedges are arranged on the three power wedges, a pair of auxiliary convex wedges are arranged between any two adjacent pairs of main convex wedges at the front end of the piston, the three pairs of auxiliary convex wedges are uniformly distributed around the circumferential direction, the three pairs of auxiliary convex wedges have the same structure as the main convex wedges, a containing groove for containing the auxiliary convex wedges is arranged at the corresponding position of the rear end surface of the jaw seat, the auxiliary convex wedges freely enter and exit in the containing groove, and the pneumatic chuck is clamped and loosened by the main convex wedges and the chutes on the jaw seat.

The above-mentioned air chucks have the disadvantages that: the main convex wedge can receive great radial force after the jack catch presss from both sides tight work piece, leads to the fracture of main convex wedge easily, even use vice convex wedge with main convex wedge to the back, still can have vice convex wedge and receive cracked problem behind the great radial force, addresses the symptoms and does not prevent the root cause.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be used to centre gripping work piece internal surface or surface, and stable in structure's vertical machining center air chuck clamping device to prior art not enough.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a vertical machining center air chuck clamping device, includes but radial movement's jack catch, still includes clamping mechanism and the double wedge piece that one end and jack catch are connected, the other end of double wedge piece is provided with opposite direction's first wedge face and second wedge face, clamping mechanism includes the shell, be provided with first piston disc and second piston disc in the shell, set up first voussoir on the first piston disc, be provided with the third wedge face that corresponds first wedge face on the first voussoir, set up the second voussoir on the second piston disc, be provided with the fourth wedge face that corresponds the second wedge face on the second voussoir, form first air chamber between first piston disc and the second piston disc, form the second air chamber between second piston disc and the shell.

Furthermore, a guide hole is formed in the first piston disc and is located beside the first wedge block, and the second wedge block penetrates through the guide hole and slides in the guide hole.

Further air chuck still includes the positioning disk, set up the guide way on the positioning disk, double wedge and positioning disk sliding connection, positioning disk and shell fixed connection.

Further the pneumatic chuck further comprises a guide rod, the guide rod penetrates through the first piston disc, the second piston disc and the shell, a first air passage and a second air passage are arranged in the guide rod, the first air passage is communicated with the first air chamber, the second air passage is communicated with the second air chamber, and a convex ring is arranged at one end, penetrating through the first piston disc, of the guide rod.

And a first limiting block and a second limiting block are arranged on the plane of the second piston disc corresponding to the first air chamber and the second air chamber respectively.

Compared with the prior art, the beneficial effects of the utility model are that: the air flue fills into highly-compressed air to the air chamber, and first piston dish is close to or keeps away from with the second piston dish, and wedge-face on the voussoir and the wedge-face interact on the double wedge piece, make the double wedge piece along the radial translation of guiding disc axis to make the jack catch press from both sides tight work piece, the voussoir on the piston dish receives radial force little after the jack catch presss from both sides tight work piece, and the voussoir can not fracture, and this air chuck can be used for the surface of centre gripping work piece, also can be used for the internal surface of centre gripping work piece.

Drawings

Fig. 1 is an exploded perspective view of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of the connection of the upper and lower piston discs with the double wedges and jaws;

FIG. 4 is a schematic perspective view of a double wedge;

FIG. 5 is a schematic perspective view of the upper piston disc;

fig. 6 is a schematic perspective view of the lower piston disc.

Reference numerals: 1. a claw; 2. a double wedge block; 3. a first wedge-shaped face; 4. a second wedge-shaped face; 5. a housing; 6. a first piston disc; 7. a second piston disc; 8. a first wedge; 9. a third wedge face; 10. a second wedge; 11. a fourth wedge-shaped surface; 12. a first air chamber; 13. a second air chamber; 14. a guide hole; 15. a guide plate; 16. a guide groove; 17. a guide bar; 18. a first air passage; 19. a second air passage; 20. a convex ring; 21. a first stopper; 22. a second limiting block; 23. a convex strip; 24. and (4) a groove.

Detailed Description

In the description of the present invention, it should be noted that, for the orientation words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and the positional relationship are indicated based on the orientation or the positional relationship shown in the drawings, and the description is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.

The present invention is further explained with reference to fig. 1 to 6.

The utility model provides a vertical machining center air chuck clamping device, includes but radial movement's jack catch 1, still includes clamping mechanism and one end and jack catch 1 connected double wedge block 2, the other end of double wedge block 2 is provided with opposite direction's first wedge face 3 and second wedge face 4, clamping mechanism includes shell 5, be provided with first piston dish 6 and second piston dish 7 in the shell 5, set up first voussoir 8 on the first piston dish 6, be provided with the third wedge face 9 that corresponds first wedge face 3 on the first voussoir 8, set up second voussoir 10 on the second piston dish 7, be provided with the fourth wedge face 11 that corresponds second wedge face 4 on the second voussoir 10, form first air chamber 12 between first piston dish 6 and the second piston dish 7, form second air chamber 13 between second piston dish 7 and the shell 5.

Preferably, as shown in fig. 1, the utility model discloses choose for use the jack catch 1 and three two voussoirs 2 of three equipartitions, but the cylindric or ring form work piece of centre gripping also has three corresponding first voussoirs 8 and second voussoir 10 on first piston dish 6 and the second piston dish 7.

Preferably, as shown in fig. 5, the third wedge surface 9 of the first wedge 8 is an inclined surface that inclines upward, and the inclined surface inclines toward the axis of the first piston disc 6, as shown in fig. 6, the fourth wedge surface 11 of the second wedge 10 is an inclined surface that inclines upward, and the inclined surface inclines away from the axis of the second piston disc 7, and the inclined angles of the third wedge surface 9 and the fourth wedge surface 11 are equal.

As shown in fig. 2, when an outer circular surface of a cylindrical workpiece is clamped, high-pressure air is filled into the first air chamber 12, the first air chamber 12 expands, the first piston disc 6 simultaneously drives three first wedge blocks 8 to ascend, each third wedge surface 9 is matched with one first wedge surface 3, the three double wedge blocks 2 simultaneously drive the three clamping jaws 1 to radially move towards the center direction of the first piston disc 6 to clamp the outer circular surface of the workpiece, and when the first piston disc 6 ascends and the second piston disc 7 descends, the space of the second air chamber 13 is reduced; when the inner circle surface of the circular workpiece is clamped, high-pressure air is filled into the second air chamber 13, the second air chamber 13 expands, the second piston disc 7 drives the three second wedge blocks 10 to ascend, each fourth wedge surface 11 is matched with one second wedge surface 4, and the three double wedge blocks 2 drive the three clamping jaws 1 to move radially away from the center of the first piston disc 6 to clamp the inner circle surface of the workpiece. The structure can be on a pneumatic chuck can the centre gripping excircle, can the centre gripping interior circle again, convenient to use improves production efficiency, and at above-mentioned work piece clamping process, first voussoir 8 only receives less radial force with second voussoir 10, is difficult for the fracture.

Preferably, as shown in fig. 2, the jaw 1 and the double wedge 2 are detachably connected by using bolts, and a technician can change the direction of the jaw 1 according to the length of a workpiece to be clamped.

As shown in fig. 2 and 5, in the preferred embodiment, the first piston disc 6 is provided with the guide hole 14, the guide hole 14 is located beside the first wedge 8, the second wedge 10 passes through the guide hole 14 and slides in the guide hole 14, so that the first piston disc 6, the second piston disc 7 and the double wedge 2 are compact, the volume of the pneumatic chuck is reduced, and the second wedge 10 is high and is easy to break after being subjected to radial force, and the second wedge 10 passes through the guide hole 14 and contacts with the guide hole 14, so that the guide hole 14 supports the second wedge 10, and the second wedge 10 is prevented from breaking during clamping.

Preferably, a sealing ring is arranged in the guide hole 14 to prevent air leakage when the second wedge 10 slides in the guide hole 14, so that the sealing performance of the first air chamber 12 and the second air chamber 13 is influenced, and the clamping of the clamping jaws 1 on a workpiece is influenced.

As shown in fig. 1, the preferred air chuck of this embodiment includes guiding disc 15, set up guide way 16 on the guiding disc 15, voussoir 2 and guiding disc 15 sliding connection, guiding disc 15 and shell 5 fixed connection, be provided with sand grip 23 on the voussoir 2, be provided with the recess 24 that corresponds sand grip 23 in the guide way 16, sand grip 23 and the cooperation of recess 24 make voussoir 2 along the radial removal of guiding disc 15 axis, need not take out voussoir 2 when dismantling jack catch 1 and just can change jack catch 1, convenient and fast. The guide disc 15 is connected with the shell 5, and the shell 5 drives the guide disc 15 to rotate instead of being driven by the clamping jaws 1 and the double wedge blocks 2, so that the double wedge blocks 2 are prevented from being damaged due to overlarge stress.

As shown in fig. 1 and 2, the air chuck preferred in this embodiment further includes a guide rod 17, the guide rod 17 passes through the first piston disc 6, the second piston disc 7 and the housing 5, a first air passage 18 and a second air passage 19 are provided in the guide rod 17, the first air passage 18 communicates with the first air chamber 12, the second air passage 19 communicates with the second air chamber 13, one end of the guide rod 17 passing through the first piston disc 6 is provided with a convex ring 20, when the first air passage 18 feeds high-pressure air to the first air chamber 12, the second air passage 19 simultaneously opens and evacuates air in the second air chamber 13, so that a larger pressure difference is formed between the first air chamber 12 and the second air chamber 13, and the jaws 1 provide a clamping force to the outer circumferential surface of the workpiece; on the contrary, when the second air passage 19 supplies high-pressure air to the second air chamber 13, the first air passage 18 simultaneously opens and evacuates the air in the first air chamber 12, so that a large pressure difference still exists between the first air chamber 12 and the second air chamber 13, and the clamping jaw 1 provides clamping force to the inner circular surface of the workpiece. A collar 20 on the guide rod 17 limits the movement of the first piston disc 6 and prevents the first piston disc 6 from being pressed out of the housing 5 by the high-pressure air.

Preferably, the guide rod 17 is in threaded connection with the convex ring 20, and the guide rod 17 is in threaded connection with the shell 5, so that the guide rod 17 can be conveniently detached and replaced.

As shown in fig. 1 and fig. 6, in the preferred embodiment, a first stopper 21 and a second stopper 22 are disposed on the second piston disc 7 on the planes corresponding to the first air chamber 12 and the second air chamber 13, respectively, and the first stopper 21 prevents the first piston disc 6 from contacting the second piston disc 7, so that the first air chamber 12 cannot be formed, and the first air channel 18 cannot ventilate the first air chamber 12, thereby affecting the clamping of the jaw 1 on the workpiece; the second stopper 22 prevents the second piston disc 7 from contacting the bottom surface of the housing 5, so that the second air chamber 13 cannot be formed, and the second air channel 19 cannot ventilate the second air chamber 13, thereby affecting the clamping of the clamping jaws 1 on the workpiece.

Preferably, the first limiting block 21 is located beside the second wedge block 10 and corresponds to the first wedge block 8, the second limiting block 22 corresponds to the second wedge block 10, and the limiting blocks correspond to the wedge blocks to prevent the piston disc from being deformed due to uneven stress and affecting the sealing performance of the air chamber.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a vertical machining center air chuck clamping device, includes radial movable's jack catch, its characterized in that: still include the double wedge piece that clamping mechanism and one end and jack catch are connected, the other end of double wedge piece is provided with opposite direction's first wedge face and second wedge face, clamping mechanism includes the shell, be provided with first piston dish and second piston dish in the shell, set up first voussoir on the first piston dish, be provided with the third wedge face that corresponds first wedge face on the first voussoir, set up the second voussoir on the second piston dish, be provided with the fourth wedge face that corresponds the second wedge face on the second voussoir, form first air chamber between first piston dish and the second piston dish, form the second air chamber between second piston dish and the shell.

2. The vertical machining center air chuck clamping device of claim 1, wherein: the first piston disc is provided with a guide hole, the guide hole is positioned beside the first wedge block, and the second wedge block penetrates through the guide hole and slides in the guide hole.

3. The vertical machining center air chuck clamping device of claim 2, wherein: the double-wedge-block-type guide device is characterized by further comprising a guide disc, wherein a guide groove is formed in the guide disc, the double-wedge-block-type guide device is in sliding connection with the guide disc, and the guide disc is fixedly connected with the shell.

4. The vertical machining center air chuck clamping device of claim 3, wherein: the guide rod penetrates through the first piston disc, the second piston disc and the shell, a first air passage and a second air passage are arranged in the guide rod, the first air passage is communicated with the first air chamber, the second air passage is communicated with the second air chamber, and a convex ring is arranged at one end, penetrating through the first piston disc, of the guide rod.

5. The vertical machining center air chuck clamping device of claim 4, wherein: and a first limiting block and a second limiting block are arranged on the plane of the second piston disc corresponding to the first air chamber and the second air chamber respectively.