CN215469754U - Quick clamping mechanism - Google Patents

Abstract

The utility model discloses a quick clamping mechanism, which relates to the technical field of machining equipment and comprises a shell, a handle, a transmission assembly and a pressing assembly, wherein the handle is arranged on the shell; a pressing opening is formed in one end of the bottom of the shell; the pressing assembly is arranged in the shell, and the bottom of the pressing assembly is positioned right above the pressing opening; the handle is arranged on one side of the outer part of the shell; the transmission assembly is arranged inside the shell, and the transmission assembly is connected with the handle and the pressing assembly. The workpiece is quickly clamped in the machining process, so that the workpiece clamping time is shortened in the machining process, and the machining production efficiency is improved. The mechanical self-locking pressing structure is adopted, the operation is simple, time-saving, labor-saving and efficient, the abrasion of the mechanism can be reduced, and the service life is prolonged.

Description

Quick clamping mechanism

Technical Field

The utility model relates to the technical field of machining equipment, in particular to a quick clamping mechanism.

Background

Most of the existing mechanical pressing devices adopt locking modes such as bolts, oil cylinders, air cylinders and the like. The three locking modes have the following defects:

bolt locking mode: the operation is slow in the use process, the working efficiency is low, and the labor intensity of workers is high. And the nut in the bolt locking mode is likely to be loosened by vibration, so that the mechanical pressing device loses the pressing effect.

Locking modes of the oil cylinder and the air cylinder: by adopting the two locking modes, the labor intensity of workers can be reduced, the production efficiency is improved, but a pump station, a valve piece, an oil (gas) path and the like are required to be provided, when a plurality of clamping devices are adopted, the number of the pipelines is large, the phenomena of oil leakage and gas leakage are easy to occur, the clamping force is reduced, the clamping requirement cannot be met, and the clamping effect is lost. If the clamping device is arranged on a movable platform, the road pipe moves along with the movable platform, and the realization is difficult.

Due to the improvement of the machining capacity, the machining of large-sized workpieces is common, in the workpiece clamping process, the workpieces need to be clamped and fixed by a plurality of fixing points, the workpieces need to be fixed by a plurality of clamping devices, the workpieces are prevented from being scrapped due to loose of the workpieces caused by loose clamping, the yield is reduced, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a quick clamping mechanism to improve the production efficiency, reduce the labor intensity of workers and realize quick clamping of workpieces.

In order to achieve the purpose, the utility model provides the following scheme:

the utility model provides a quick clamping mechanism which comprises a shell, a handle, a transmission assembly and a pressing assembly, wherein the handle is arranged on the shell; a pressing opening is formed in one end of the bottom of the shell; the pressing assembly is arranged in the shell, and the bottom of the pressing assembly is positioned right above the pressing opening; the handle is arranged on one side of the outer part of the shell; the transmission assembly is arranged inside the shell, and the transmission assembly is connected with the handle and the pressing assembly.

Optionally, a self-locking structure is further arranged between the top of the pressing assembly and the shell.

Optionally, the self-locking structure comprises a diamond block, an upper supporting seat and a lower supporting seat; the upper supporting seat is arranged at the top in the shell, the lower supporting seat is arranged at the top of the pressing assembly, and the lower supporting seat is positioned right below the upper supporting seat in a pressing state; the top of the diamond block is movably arranged in the upper supporting seat, and the bottom of the diamond block is movably arranged in the lower supporting seat.

Optionally, the diamond block is located right above the compressing opening.

Optionally, the pressing assembly comprises an upper pressing head and a lower pressing head; the bottom of the upper pressure head is provided with a first inclined plane, the top of the lower pressure head is provided with a second inclined plane, and the first inclined plane is matched with the second inclined plane; an elastic part is arranged between the bottom of the lower pressure head and the shell; the transmission assembly is connected with the upper pressure head.

Optionally, the transmission assembly includes an eccentric wheel and a connecting rod, a rotation axis of the eccentric wheel is connected with one end of the handle, one end of the connecting rod is rotatably connected with a non-rotation axis of the eccentric wheel, and the other end of the connecting rod is rotatably connected with the pressing assembly.

Optionally, a transmission shaft is arranged between one end of the handle and the transmission assembly.

Optionally, a base is arranged at the bottom of the shell.

Compared with the prior art, the utility model has the following technical effects:

1. the workpiece is quickly clamped in the machining process, so that the workpiece clamping time is shortened in the machining process, and the machining production efficiency is improved.

2. The mechanical self-locking pressing structure is adopted, the operation is simple, time-saving, labor-saving and efficient, the abrasion of the mechanism can be reduced, and the service life is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a quick clamping mechanism of the present invention;

FIG. 2 is a schematic top cross-sectional structural view of the quick clamping mechanism of the present invention;

FIG. 3 is a schematic perspective view of the quick clamping mechanism of the present invention;

FIG. 4 is a schematic structural view of a self-locking mechanism in the rapid clamping mechanism of the present invention;

FIG. 5 is a schematic side sectional view of the self-locking mechanism of the present invention;

FIG. 6 is an analysis chart of the self-locking condition of the upper pressing head and the lower pressing head in the rapid clamping mechanism of the utility model.

Description of reference numerals: 1. reinforcing ribs; 2. a drive shaft; 3. a handle; 4. an eccentric wheel; 5. a connecting rod; 6. an upper pressure head; 7. a lower pressure head; 8. a self-locking structure; 9. a driving shaft sleeve; 10. a passive shaft sleeve; 11. a housing; 12. a base; 13. an upper support base; 14. diamond-shaped blocks; 15. and a lower support seat.

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.

As shown in fig. 1 to 5, the present embodiment provides a quick clamping mechanism, which includes a housing 11, a handle 3, a transmission assembly and a pressing assembly; one end of the bottom of the shell 11 is provided with a pressing port; the pressing assembly is arranged in the shell 11, and the bottom of the pressing assembly is positioned right above the pressing opening; the handle 3 is arranged on one side of the outer part of the shell 11; the transmission assembly is arranged inside the shell 11, and the transmission assembly is connected with the handle 3 and the pressing assembly.

In this embodiment, a self-locking structure 8 is further disposed between the top of the compressing assembly and the housing 11. The self-locking structure 8 comprises a diamond block 14, an upper supporting seat 13 and a lower supporting seat 15; an upper supporting seat 13 is arranged at the top in the shell 11, a lower supporting seat 15 is arranged at the top of the pressing component, and the lower supporting seat 15 is positioned right below the upper supporting seat 13 in a pressing state; the top of the diamond block 14 is movably arranged in the upper supporting seat 13, and the bottom of the diamond block 14 is movably arranged in the lower supporting seat 15. Diamond-shaped block 14 is located directly above the hold-down opening. In the pressing state, the diamond blocks 14 are kept in a vertical state, the vertical axes of the diamond blocks 14 are coaxially arranged with the vertical axis of the upper pressing block, the vertical axis of the lower pressing block and the center line of the pressing port, and in the pressing state, the force from the workpiece in the vertical direction is coaxial with the vertical axis of the diamond blocks 14.

The pressing assembly comprises an upper pressing head 6 and a lower pressing head 7; the bottom of the upper pressure head 6 is provided with a first inclined plane, the top of the lower pressure head 7 is provided with a second inclined plane, and the first inclined plane is matched with the second inclined plane; an elastic part is arranged between the bottom of the lower pressure head 7 and the shell 11, and the elastic part is preferably a spiral spring; the connecting rod 5 is connected with the upper pressure head 6. The transmission component comprises an eccentric wheel 4 and a connecting rod 5, the rotating axis of the eccentric wheel 4 is connected with one end of the handle 3, one end of the connecting rod 5 is rotatably connected with the non-rotating axis of the eccentric wheel 4, and the other end of the connecting rod 5 is rotatably connected with the upper pressure head 6. A transmission shaft 2 is arranged between one end of the handle 3 and the transmission component. The transmission shaft 2 drives the eccentric wheel 4 to rotate through the push-pull handle 3, so that the connecting rod 5 drives the upper pressure head 6 to translate, and the lower pressure head 7 moves up and down under the guiding action of the first inclined plane and the second inclined plane and the elastic action of the elastic piece, thereby completing the conversion between a pressing state and a loosening state. Further, the eccentric wheel 4 has a plurality of eccentric distances and is connected with different positions on the eccentric wheel 4 through the adjusting connecting rod 5 so as to adjust the locking force and the self-locking point position. The transmission shaft 2 is provided with a pair of shaft sleeves, each shaft sleeve comprises a driving shaft sleeve 9 and a driven shaft sleeve 10, the driving shaft sleeve 9 is fixedly connected with the transmission shaft 2 through splines or common keys and the like, the eccentric wheel 4 is fixed on the driven shaft sleeve 10, the driven shaft sleeve 10 slides on the transmission shaft 2, and the end faces of the driving shaft sleeve 10 and the driven shaft sleeve 10 are radial concave-convex matched profiles for transmitting torque force, when the eccentric wheel 4 is adjusted to a required eccentric angle, the driven shaft sleeve 10 can be locked to prevent axial sliding of the driven shaft sleeve 10, and the driving shaft sleeve 10 and the driven shaft sleeve 10 are prevented from being separated to lose torque force transmission.

As shown in fig. 6, the self-locking condition of the upper ram 6 and the lower ram 7 is analyzed:

f-clamping or vertical force;

F₁、F₂force of resolution of the clamping force (reaction force)

F_fActing surface frictional resistance

Theta is the included angle between the relative sliding direction of the matching surfaces of the upper pressure head 7 and the lower pressure head 7 and the horizontal plane;

μ — coefficient of friction between materials;

in order to achieve the self-locking function between the upper pressure head 6 and the lower pressure head 7, the included angle theta and the friction coefficient mu are key parameters determining the self-locking performance, the design selection of the parameters theta and mu is particularly important, and the parameter mu is related to the material selection, the processing and the matching surface structure of the upper pressure head 6 and the lower pressure head 7. In order to ensure that the self-locking mechanism has a corresponding self-locking function, the following conditions must be met:

F_f＝F₂

F×cosθ×μ＝F×sinθ

tanθ＝μ

the bottom of the shell 11 is provided with a base 12. The base 12 is adapted to be coupled to a platform, and the height of the base 12 above the platform can be adjusted for workpieces of different sizes.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.

Claims (8)

1. A quick clamping mechanism is characterized by comprising a shell, a handle, a transmission assembly and a pressing assembly; a pressing opening is formed in one end of the bottom of the shell; the pressing assembly is arranged in the shell, and the bottom of the pressing assembly is positioned right above the pressing opening; the handle is arranged on one side of the outer part of the shell; the transmission assembly is arranged inside the shell, and the transmission assembly is connected with the handle and the pressing assembly.

2. The quick clamping mechanism of claim 1, further comprising a self-locking mechanism disposed between said clamping assembly top and said housing.

3. The rapid clamping mechanism according to claim 2, wherein the self-locking structure comprises a diamond-shaped block, an upper support seat and a lower support seat; the upper supporting seat is arranged at the top in the shell, the lower supporting seat is arranged at the top of the pressing assembly, and the lower supporting seat is positioned right below the upper supporting seat in a pressing state; the top of the diamond block is movably arranged in the upper supporting seat, and the bottom of the diamond block is movably arranged in the lower supporting seat.

4. The quick clamping mechanism of claim 3 wherein said diamond-shaped block is positioned directly above said compression port.

5. The quick clamping mechanism of claim 1 wherein said clamping assembly includes an upper ram and a lower ram; the bottom of the upper pressure head is provided with a first inclined plane, the top of the lower pressure head is provided with a second inclined plane, and the first inclined plane is matched with the second inclined plane; an elastic part is arranged between the bottom of the lower pressure head and the shell; the transmission assembly is connected with the upper pressure head.

6. The quick clamping mechanism according to claim 1 wherein said drive assembly comprises an eccentric wheel and a connecting rod, said eccentric wheel having an axis of rotation connected to one end of said handle, said connecting rod having one end rotatably connected to a non-rotational axis of said eccentric wheel and the other end rotatably connected to said clamping assembly.

7. The quick clamping mechanism of claim 1 wherein a drive shaft is disposed between one end of said handle and said drive assembly.

8. The quick clamping mechanism of claim 1 wherein said housing bottom is provided with a base.

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