Tool unit of self-adaptive vacuum chuck

Abstract

The tool unit comprises a supporting seat assembly, a suction cup is arranged on the upper surface of the supporting seat assembly, a tensioning mechanism is arranged on the bottom face of the interior of the supporting seat assembly, the suction cup is connected with the supporting seat assembly through the tensioning mechanism, the tensioning mechanism comprises a shell, a sliding shaft is arranged in the shell, and the sliding shaft is connected with the supporting seat assembly. The outer wall of the sliding shaft is sleeved with a spring, the upper end of the sliding shaft is connected with a pull rod, and a workpiece is tensioned by the suction cup through a tensioning mechanism. The suction cup is in contact with a workpiece, the requirement for the surface flatness of the workpiece is lowered, the suction cup automatically provides pulling force when the suction cup conducts suction, the pulling force is provided by an internal spring, other energy transfer is not needed, the workpiece fixing and releasing speed is high, the clamping efficiency is high, and the device can adapt to fixing of different materials, especially for soft materials. And damage such as indentation on the surface of the workpiece is avoided.

Description

Technical Field

[0001] The invention relates to a tooling unit, in particular to a tooling unit of an adaptive vacuum suction cup. Background Art

[0002] In CNC machine tools and automation equipment, it is often necessary to clamp and fix workpieces or parts on the platform to facilitate processing or assembly operations. There are currently two commonly used tooling fixation forms. One is mechanical clamping, which includes clamping plates and cylinders. The other is magnetic tooling, which often arranges multiple sets of magnetic blocks on the workbench to clamp the iron workpiece through the magnetic field.

[0003] Mechanical clamping tooling: For workpieces or plates with severe warping, mechanical clamping can easily cause the workpiece to deform. In addition, the clamping point will interfere with the processing or assembly operations.

[0004] Magnetic tooling: If the bottom of the workpiece is not flat, an air gap will be created, greatly weakening the magnetic attraction. Magnetic tooling can only work on iron workpieces, and cannot be used on stainless steel, aluminum, and non-metallic materials. Summary of the invention

[0005] The present invention provides a tooling unit of an adaptive vacuum suction cup to overcome the defect that the tooling of machined parts in the prior art may cause deformation of the parts.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: The present invention discloses a tooling unit for an adaptive vacuum suction cup, comprising a support seat assembly, wherein a suction cup is provided on the upper surface of the support seat assembly, and a tensioning mechanism is provided on the inner bottom surface thereof, wherein the suction cup is connected to the support seat assembly via the tensioning mechanism, and wherein the tensioning mechanism comprises a shell, wherein a sliding shaft is provided inside the shell, wherein a spring is provided on the outer wall of the sliding shaft, and a pull rod is connected to the upper end thereof, and the suction cup is tightened to a workpiece via the tensioning mechanism.

[0007] Furthermore, the support seat assembly includes a support seat body, an upper surface of which is provided with an elastic pad, an inner wall of which is provided with a top block bracket, and a plurality of top blocks are provided on the top block bracket.

[0008] Furthermore, the suction cup includes a disc body, a flexible lip is fixed on the periphery of the disc body, and an air outlet and an air inlet are respectively provided on the disc body.

[0009] Furthermore, the tensioning mechanism also includes a bottom cover located at the bottom of the shell, which is used to limit the sliding shaft. Self-lubricating sleeve A and self-lubricating sleeve B are respectively provided at both ends of the sliding shaft. The upper end of the self-lubricating sleeve A is provided with a pressure cover B for limiting, and the lower part of the self-lubricating sleeve B is provided with a pressure cover A for limiting.

[0010] Furthermore, a ball head is provided at the upper end of the pull rod to cooperate with the ball socket below the disc body.

[0011] Furthermore, the air outlet leads to a vacuum device, and the vacuum device is used to create a vacuum in the suction cup.

[0012] The beneficial effects achieved by the present invention are: the suction cup is used to contact the workpiece, thereby reducing the requirement for the surface flatness of the workpiece; the suction cup automatically provides a pulling force while the suction cup is adsorbing, and this pulling force is provided by an internal spring without the need for other energy transfer; the workpiece is fixed and released at a fast speed, and the clamping efficiency is high; it can adapt to the fixation of different materials, especially for relatively soft materials, and will not cause damage such as indentations to the workpiece surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a side structural schematic diagram of the present invention; Figure 3 The present invention Figure 2 Schematic diagram of the cross-sectional structure along the BB direction.

[0014] In the figure: 1. Support seat assembly; 1-1. Support seat body; 1-2. Top block bracket; 1-3. Elastic pad; 1-4. Top block; 2. Suction cup; 2-1. Flexible lip; 2-2. Disc body; 2-3. Air outlet; 2-4. Air inlet; 3. Tensioning mechanism; 3-1. Shell; 3-2. Sliding shaft; 3-3. Bottom cover; 3-4 Spring; 3-5. Pull rod; 3-6. Self-lubricating sleeve A; 3-7. Self-lubricating sleeve B; 3-8. Pressure cover A; 3-9. Pressure cover B. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0016] Example 1 like Figure 1-3 As shown, a tooling unit of an adaptive vacuum suction cup includes a support base assembly 1, the upper surface of the support base assembly 1 is provided with a suction cup 2, the inner bottom surface thereof is provided with a tensioning mechanism 3, and the suction cup 2 is connected to the support base assembly 1 through the tensioning mechanism 3.

[0017] The support seat assembly 1 includes a support seat body 1-1, which is a rigid body with a hollow interior and a bottom surface fixed on a table or foundation. The support seat body 1-1 supports the workpiece to be clamped, and an elastic pad 1-3 arranged on the upper surface is in direct contact with the bottom surface of the workpiece. A suction cup 2 and a tensioning mechanism 3 are embedded in the support seat assembly 1. When the suction cup 2 is not working, a top block bracket 1-2 is arranged on the inner wall of the support seat body 1-1, and a plurality of top blocks 1-4 are arranged on the top block bracket 1-2 for supporting and maintaining the stability of the suction cup 2.

[0018] The suction cup 2 consists of a cup body 2-2 and a flexible lip 2-1 fixed around the cup body 2-2. When the suction cup 2 is not working, the top of the cup body 2-2 is lower than the top of the support seat assembly 1. The suction cup 2 has an air outlet 2-3 and an air inlet 2-4. The air outlet 2-3 leads to a vacuum device. When the suction cup 2 is working, the air outlet 2-3 is connected to the air inlet 2-4 and closed, and a vacuum is generated in the suction cup 2, so that the workpiece is pressed against the suction cup 2 and sucked tightly. When the suction cup 2 releases the workpiece, the air inlet 2-4 is connected to blow air to destroy the vacuum in the cup body 2-2.

[0019] The tensioning mechanism 3 is composed of a housing 3-1, a sliding shaft 3-2, a bottom cover 3-3, a spring 3-4, a pull rod 3-5, a self-lubricating sleeve A3-6 and a self-lubricating sleeve B3-7, a pressure cover A3-8 and a pressure cover B3-9. The shell 3-1 is fixedly connected to the inner side of the bottom plate of the tooling support seat assembly 1, and the bottom cover 3-3 is coaxially fixedly connected to the lower side hole of the shell 3-1 as the lower limit gear of the sliding shaft 3-2. Self-lubricating sleeves A3-6 and self-lubricating sleeves B3-7 are respectively installed at both ends of the sliding shaft 3-2. The sliding shaft 3-2 can slide up and down. When the suction cup 2 is not working, the sliding shaft 3-2 is acted upon by the pressure of the spring 3-4 to the lower limit position. The upper end of the sliding shaft 3-2 is fixedly coaxially connected to the pull rod 3-5. A ball head is set at the upper end of the pull rod 3-5 to cooperate with the ball socket of the disc body 2-2. The self-lubricating sleeve A3-6 is limited by the pressure cover B3-9 above it, and the self-lubricating sleeve B3-7 is limited by the pressure cover A3-8 below it.

[0020] When the suction cup 2 is working, the vacuum inside the suction cup 2 is lifted, driving the pull rod 3-5 to move upward, the sliding shaft 3-2 moves upward and further compresses the spring 3-4, and the reaction force of the spring 3-4 causes the pull rod 3-5 to generate a downward force, so that the suction cup 2 sucks the bottom surface of the workpiece and tightens the workpiece.

[0021] Working principle: When the workpiece is placed on the support seat assembly 1, the elastic pad 1-3 contacts and supports the workpiece, the flexible lip 2-1 contacts the surface of the workpiece, and there is a certain gap between the disc body 2-2 and the workpiece. When the workpiece needs to be fixed, the vacuum device is started, the suction cup 2 is vacuumed, and the suction cup 2 is instantly pulled up, and the disc body 2-2 is close to the bottom of the workpiece; at the same time, the pull rod 3-5 and the sliding shaft 3-2 are driven up; at the same time, the spring 3-4 is further compressed, and the spring 3-4 exerts a downward reaction force on the pull rod 3-5, so that the suction cup 2 exerts a downward pulling force on the workpiece. Under the action of this pulling force, static friction is generated between the workpiece and the elastic pad 1-3, and the workpiece is fixed on the support seat body 1-1. When the workpiece does not need to be fixed, air is taken into the suction cup 2 to destroy the vacuum, the disc body 2-2 leaves the bottom of the workpiece, and the suction cup 2 no longer adsorbs the workpiece. For large parts, this adaptive vacuum suction cup fixture unit can be used in pairs.

[0022] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. The terms used in the description of this application are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0024] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

Claims

1. A tooling unit for an adaptive vacuum suction cup, characterized in that: It includes a support base assembly, wherein a suction cup is provided on the upper surface of the support base assembly, and a tensioning mechanism is provided on the inner bottom surface thereof, and the suction cup is connected to the support base assembly through the tensioning mechanism; The tensioning mechanism comprises a shell, a sliding shaft is arranged in the shell, a spring is sleeved on the outer wall of the sliding shaft, a pull rod is connected to the upper end of the sliding shaft, and the suction cup is used to tighten the workpiece through the tensioning mechanism.

2. The tooling unit of the adaptive vacuum chuck according to claim 1, characterized in that: The support seat assembly comprises a support seat body, an upper surface of which is provided with an elastic pad, an inner wall of which is provided with a top block bracket, and a plurality of top blocks are provided on the top block bracket.

3. The tooling unit of the adaptive vacuum chuck according to claim 1, characterized in that: The suction cup comprises a cup body, a flexible lip is fixed on the periphery of the cup body, and an air outlet and an air inlet are respectively arranged on the cup body.

4. The tooling unit of the adaptive vacuum chuck according to claim 1, characterized in that: The tensioning mechanism also includes a bottom cover located at the bottom of the shell, which is used to limit the sliding shaft. Self-lubricating sleeves A and self-lubricating sleeves B are respectively provided at both ends of the sliding shaft. A pressure cover B for limiting is provided at the upper end of the self-lubricating sleeve A, and a pressure cover A for limiting is provided below the self-lubricating sleeve B.

5. The tooling unit of the adaptive vacuum chuck according to claim 3, characterized in that: A ball head is arranged at the upper end of the pull rod and matches with a ball socket below the plate body.

6. The tooling unit of the adaptive vacuum chuck according to claim 3, characterized in that: The air outlet leads to a vacuum device, and the vacuum device is used to create a vacuum on the suction cup.

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