A quick clamping mechanism

Abstract

The present invention discloses a quick clamping mechanism, which relates to the technical field of mechanical processing equipment, and includes a shell, a handle, a transmission assembly and a clamping assembly; a clamping port is provided at one end of the bottom of the shell; the clamping assembly is provided inside the shell, and the bottom of the clamping assembly is located directly above the clamping port; the handle is provided on one side of the outside of the shell; the transmission assembly is provided inside the shell, and the transmission assembly is connected to both the handle and the clamping assembly. The workpiece can be clamped quickly during the mechanical processing, thereby shortening the workpiece clamping time during the mechanical processing and improving the mechanical processing production efficiency. The mechanical self-locking clamping structure is adopted, which is simple to operate, time-saving, labor-saving, and efficient, and can reduce the wear of the mechanism and increase the service life.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing equipment, in particular to a quick clamping mechanism. Background Art

[0002] Many existing mechanical clamping devices mostly use bolts, oil cylinders, air cylinders and other locking methods. All three locking methods have the following disadvantages:

[0003] Bolt locking method: The operation is slow, the work efficiency is low, and the labor intensity of workers is high. In addition, the nut in the bolt locking method is likely to loosen due to vibration, so that the mechanical clamping device loses its clamping effect.

[0004] Oil cylinder and air cylinder locking methods: These two locking methods can reduce the labor intensity of workers and improve production efficiency, but they must be equipped with pump stations, valves, oil (gas) lines, etc. When multiple clamping devices are used, there are many pipelines, which are prone to oil and gas leakage, resulting in a smaller clamping force and failure to meet the clamping requirements, thus losing the clamping effect. If the clamping device is installed on a moving platform, the pipeline will also move with it, which is not easy to achieve.

[0005] Due to the improvement of mechanical processing capabilities, the processing of large workpieces has become very common. During the workpiece clamping process, multiple fixed points are required to clamp and fix the workpiece. Therefore, multiple clamping devices are needed to fix the workpiece to prevent the workpiece from loosening due to loose clamping, resulting in the scrapping of the workpiece, reducing the yield rate and increasing production costs. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a quick clamping mechanism to improve production efficiency, reduce the labor intensity of workers, and achieve quick clamping of workpieces.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides a quick clamping mechanism, comprising a shell, a handle, a transmission assembly and a clamping assembly; a clamping port is provided at one end of the bottom of the shell; the clamping assembly is provided inside the shell, and the bottom of the clamping assembly is located directly above the clamping port; the handle is provided on one side of the outside of the shell; the transmission assembly is provided inside the shell, and the transmission assembly is connected to both the handle and the clamping assembly.

[0009] Optionally, a self-locking structure is further provided between the top of the clamping assembly and the shell.

[0010] Optionally, the self-locking structure includes a diamond block, an upper support seat and a lower support seat; the upper support seat is arranged at the top of the shell, and the lower support seat is arranged at the top of the clamping assembly, and in the clamping state, the lower support seat is located directly below the upper support seat; the top of the diamond block is movably arranged in the upper support seat, and the bottom of the diamond block is movably arranged in the lower support seat.

[0011] Optionally, the diamond block is located directly above the pressing port.

[0012] Optionally, the clamping assembly includes an upper pressure head and a lower pressure head; a first inclined surface is provided at the bottom of the upper pressure head, and a second inclined surface is provided at the top of the lower pressure head, and the first inclined surface matches the second inclined surface; an elastic member is provided between the bottom of the lower pressure head and the shell; and the transmission assembly is connected to the upper pressure head.

[0013] Optionally, the transmission assembly includes an eccentric wheel and a connecting rod, the rotating axis of the eccentric wheel is connected to one end of the handle, one end of the connecting rod is rotatably connected to the non-rotating axis of the eccentric wheel, and the other end of the connecting rod is rotatably connected to the clamping assembly.

[0014] Optionally, a transmission shaft is provided between one end of the handle and the transmission assembly.

[0015] Optionally, a base is provided at the bottom of the shell.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] 1. Realize quick clamping of workpieces during machining, thereby shortening the clamping time of workpieces during machining and improving machining production efficiency.

[0018] 2. The mechanical self-locking clamping structure is simple to operate, time-saving, labor-saving, and efficient. It can also reduce the wear of the mechanism and increase its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a cross-sectional structural schematic diagram of the quick clamping mechanism of the present invention;

[0021] Figure 2 It is a schematic diagram of a top cross-sectional structure of the quick clamping mechanism of the present invention;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the quick clamping mechanism of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the self-locking structure in the quick clamping mechanism of the present invention;

[0024] Figure 5 It is a side cross-sectional structural schematic diagram of the self-locking structure in the quick clamping mechanism of the present invention;

[0025] Figure 6 This is an analysis diagram of the self-locking conditions of the upper and lower pressure heads in the quick clamping mechanism of the present invention.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. reinforcing rib; 2. transmission shaft; 3. handle; 4. eccentric wheel; 5. connecting rod; 6. upper pressure head; 7. lower pressure head; 8. self-locking structure; 9. active shaft sleeve; 10. passive shaft sleeve; 11. housing; 12. base; 13. upper support seat; 14. diamond block; 15. lower support seat. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 5 As shown, this embodiment provides a quick clamping mechanism, including a shell 11, a handle 3, a transmission assembly and a clamping assembly; a clamping port is provided at one end of the bottom of the shell 11; the clamping assembly is provided inside the shell 11, and the bottom of the clamping assembly is located directly above the clamping port; the handle 3 is provided on one side of the outside of the shell 11; the transmission assembly is provided inside the shell 11, and the transmission assembly is connected to both the handle 3 and the clamping assembly.

[0029] In this specific embodiment, a self-locking structure 8 is further provided between the top of the clamping assembly and the shell 11. The self-locking structure 8 includes a diamond block 14, an upper support seat 13 and a lower support seat 15; an upper support seat 13 is provided at the top of the shell 11, and a lower support seat 15 is provided at the top of the clamping assembly. In the clamping state, the lower support seat 15 is located directly below the upper support seat 13; the top of the diamond block 14 is movably provided in the upper support seat 13, and the bottom of the diamond block 14 is movably provided in the lower support seat 15. The diamond block 14 is located directly above the clamping port. In the clamping state, the diamond block 14 maintains a vertical state, and the vertical axis of the diamond block 14 is coaxial with the vertical axis of the upper clamping block, the vertical axis of the lower clamping block and the center line of the clamping port. In the clamping state, the vertical force from the workpiece is coaxial with the vertical axis of the diamond block 14.

[0030] The clamping assembly includes an upper pressing head 6 and a lower pressing head 7; a first inclined surface is provided at the bottom of the upper pressing head 6, and a second inclined surface is provided at the top of the lower pressing head 7, and the first inclined surface matches the second inclined surface; an elastic member is provided between the bottom of the lower pressing head 7 and the housing 11, and a spiral spring is preferably used as the elastic member; and a connecting rod 5 is connected to the upper pressing head 6. The transmission assembly includes an eccentric wheel 4 and a connecting rod 5, the rotation axis of the eccentric wheel 4 is connected to one end of the handle 3, one end of the connecting rod 5 is rotatably connected to the non-rotating axis of the eccentric wheel 4, and the other end of the connecting rod 5 is rotatably connected to the upper pressing head 6. A transmission shaft 2 is provided between one end of the handle 3 and the transmission assembly. By pushing and pulling the handle 3, the transmission shaft 2 drives the eccentric wheel 4 to rotate, so that the connecting rod 5 drives the upper pressing head 6 to translate, and under the guiding effect of the first inclined surface and the second inclined surface and the elastic force of the elastic member, the lower pressing head 7 moves up and down, completing the conversion between the clamping and releasing states. Furthermore, the eccentric wheel 4 has multiple eccentric distances, and is connected to different positions on the eccentric wheel 4 by adjusting the connecting rod 5 to adjust the locking force and the self-locking point. A pair of sleeves is installed on the transmission shaft 2, and the sleeves include an active sleeve 9 and a passive sleeve 10. The active sleeve 9 is connected and fixed to the transmission shaft 2 through a spline or a common key, etc. The eccentric wheel 4 is fixed on the passive sleeve 10, and the passive sleeve 10 slides on the transmission shaft 2. The end faces of the active and passive sleeves 10 are radially concave and convex matching surfaces for transmitting torque. When the eccentric wheel 4 is adjusted to the required eccentric angle, the passive sleeve 10 can be locked to prevent its axial sliding, avoid the active and passive sleeves 10 from being separated, and lose torque transmission.

[0031] like Figure 6 As shown, the self-locking condition analysis of the upper pressure head 6 and the lower pressure head 7 is:

[0032] F – clamping force or vertical force;

[0033] F1, F2——Reaction force of clamping force

[0034] F f ——Frictional resistance of the working surface

[0035] θ——the angle between the relative sliding direction of the mating surfaces of the upper and lower pressure heads 7 and the horizontal plane;

[0036] μ——friction coefficient between materials;

[0037] In order to achieve the self-locking function between the upper pressure head 6 and the lower pressure head 7, the angle θ and the friction coefficient μ are the key parameters that determine the self-locking performance, and the design and selection of the parameters θ and μ are particularly important. At the same time, the parameter μ is related to the material selection, processing, and the structure of the matching surface of the upper pressure head 6 and the lower pressure head 7. In order to ensure that it has the corresponding self-locking function, the following conditions must be met:

[0038] F f =F2

[0039] F×cosθ×μ=F×sinθ

[0040] tanθ=μ

[0041] A base 12 is provided at the bottom of the housing 11. The base 12 is used to be connected to the platform, and the height of the base 12 on the platform can be adjusted for workpieces of different sizes.

[0042] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0043] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A quick clamping mechanism, characterized in that: It comprises a shell, a handle, a transmission assembly and a clamping assembly; a clamping opening is arranged at one end of the bottom of the shell; the clamping assembly is arranged inside the shell, and the bottom of the clamping assembly is located directly above the clamping opening; the handle is arranged on one side of the outside of the shell; the transmission assembly is arranged inside the shell, and the transmission assembly is connected to both the handle and the clamping assembly; A self-locking structure is also provided between the top of the clamping assembly and the housing; The self-locking structure comprises a diamond block, an upper support seat and a lower support seat; the upper support seat is arranged at the top of the shell, the lower support seat is arranged at the top of the clamping assembly, and in the clamping state, the lower support seat is located directly below the upper support seat; the top of the diamond block is movably arranged in the upper support seat, and the bottom of the diamond block is movably arranged in the lower support seat; The diamond block is located directly above the pressing port; The clamping assembly includes an upper pressing head and a lower pressing head; a first inclined surface is provided at the bottom of the upper pressing head, and a second inclined surface is provided at the top of the lower pressing head, and the first inclined surface matches the second inclined surface; an elastic member is provided between the bottom of the lower pressing head and the housing; the transmission assembly is connected to the upper pressing head; The self-locking function between the upper pressure head and the lower pressure head satisfies the following conditions; F f =F2; F×cosθ×μ=F×sinθ; tanθ=μ; Where, F is the clamping force or vertical force, F f is the friction resistance of the working surface, F2 is the decomposition of the clamping force, θ is the angle, and μ is the friction coefficient.

2. The quick clamping mechanism according to claim 1, characterized in that: The transmission assembly includes an eccentric wheel and a connecting rod, the rotating axis of the eccentric wheel is connected to one end of the handle, one end of the connecting rod is rotatably connected to the non-rotating axis of the eccentric wheel, and the other end of the connecting rod is rotatably connected to the clamping assembly.

3. The quick clamping mechanism according to claim 1, characterized in that: A transmission shaft is arranged between one end of the handle and the transmission assembly.

4. The quick clamping mechanism according to claim 1, characterized in that: A base is arranged at the bottom of the shell.

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