A universal variable-diameter vacuum sucker

Abstract

The present invention relates to the technical field of processing equipment, and particularly relates to a universal variable-diameter vacuum suction tool. The technical solution adopted is as follows: A number of annular channels are concentrically arranged inside the suction tool body. A number of adsorption holes are circumferentially distributed in the annular channels, and the adsorption holes extend upward to the upper end surface of the suction tool body. A first straight channel and a second straight channel are arranged inside the suction tool body. Both the first straight channel and the second straight channel extend radially from the center of the annular channel along the outermost annular channel. A number of first communication holes for communicating with the annular channel and second communication holes for communicating with the second straight channel are arranged at intervals along the length direction of the first straight channel. The ventilation states of the first communication holes and the second communication holes are adjustable, and the second straight channel is used for communicating with a negative pressure source. The effective adsorption radius of the present invention is adjustable, and it can clamp workpieces with solid or hollow structures, reducing the processing cost, shortening the processing time, and ensuring the processing accuracy of the workpieces.

Description

Technical Field

[0001] The invention relates to the technical field of processing equipment, and in particular to a universal variable-diameter vacuum gripper. Background Art

[0002] The clamping of workpieces is an important part of the machining process, which affects the machining quality and efficiency. The vacuum gripper is a special workpiece clamping device used in precision machining. It evacuates the gripper and uses the adsorption holes on the gripper surface to achieve the pressure difference between the workpiece and the gripper contact surface and the exposed atmospheric surface to hold the workpiece in place, thereby achieving the purpose of fixing the workpiece.

[0003] For vacuum adsorption of annular workpieces with hollow structures (including non-hollow ones), grippers of different structures and sizes are usually customized according to the size of the annular surface of the workpiece. The cost of the grippers is high and affects the processing efficiency. Alternatively, excess air holes are blocked with tape, and the surface after the tape is pasted is inconvenient to clean as a reference surface, and the grippers often need to be reprocessed, which will increase processing costs and time just like customized grippers. Summary of the invention

[0004] In view of the technical problems of high cost and long processing time of the existing vacuum suction cup for clamping hollow annular workpieces, the present invention provides a universal variable diameter vacuum suction cup, which can realize rapid adjustment of the suction diameter of the suction cup without contaminating the reference surface of the suction cup. There is no need to specially customize suction cups for workpieces of various sizes, which reduces processing costs, shortens processing time and ensures the processing accuracy of the workpiece.

[0005] The present invention is achieved through the following technical solutions:

[0006] A universal variable-diameter vacuum suction device comprises a suction device body, wherein a plurality of annular channels are concentrically arranged in the suction device body, a plurality of adsorption holes are distributed circumferentially in the annular channels, and the adsorption holes extend upward to the upper end surface of the suction device body, and a first straight channel and a second straight channel are arranged in the suction device body; the first straight channel and the second straight channel both extend from the center of the annular channel along the radial direction of the outermost annular channel, and the first straight channel is provided with a plurality of first connecting holes for connecting the annular channels and a second connecting hole for connecting the second straight channel at intervals along the length direction of the first straight channel, the ventilation states of the first connecting holes and the second connecting holes are adjustable, and the second straight channel is used to connect to a negative pressure source.

[0007] When the present invention is in use, the second straight channel is connected to the negative pressure source, and by controlling the ventilation state of the first connecting hole and the second connecting hole, the corresponding annular channel can be selected to be connected to the negative pressure source, so that the workpiece surface corresponding to the upper end face of the gripper body is adsorbed and attached through the adsorption hole, and then the workpiece is clamped by negative pressure to achieve clamping of the solid workpiece. Among them, the first straight channel and the second straight channel both extend from the center of the annular channel along the radial direction of the outermost annular channel. When the first connecting hole connected to the inner annular channel is in a closed state, the adsorption hole connected to the inner annular channel is in a closed state, so as to adsorb the workpiece with a hollow structure. Therefore, the present invention can realize the rapid adjustment of the adsorption diameter of the gripper, can clamp a solid or hollow workpiece, and will not pollute the gripper reference surface. There is no need to specially customize the gripper for workpieces of various sizes, which reduces the processing cost, shortens the processing time and ensures the processing accuracy of the workpiece.

[0008] As a specific implementation method for adjusting the ventilation state of the first connecting hole, a first blocking part and a second blocking part are respectively provided at both ends of the first straight channel, and the positions of the first blocking part and the second blocking part in the length direction of the first straight channel are variable, so that the corresponding annular channel can be selected to be connected to the first straight channel through the positions of the first blocking part and the second blocking part.

[0009] To facilitate processing of the first straight channel, a third straight channel is also provided in the suction device body. The third straight channel is concentrically arranged with the first straight channel, one end of the third straight channel is connected to the first straight channel, and the other end of the third straight channel passes through the suction device body. It is also convenient to adjust the positions of the first blocking part and the second blocking part respectively.

[0010] As a specific implementation of adjusting the position of the first blocking portion, the first blocking portion is pushed by a first adjusting screw, one end of the first adjusting screw is connected to the first blocking portion, and the first adjusting screw is threadedly connected to the side wall of the first straight channel.

[0011] As a specific implementation of adjusting the position of the second blocking part, the second blocking part is pushed by a second adjusting screw, one end of the second adjusting screw is connected to the second blocking part, and the second adjusting screw is connected to the third straight channel screw.

[0012] As a specific implementation for adjusting the ventilation state of the second connecting hole, a third blocking portion is provided in the second straight channel, and the position of the third blocking portion in the length direction of the second straight channel is variable.

[0013] As a specific implementation method for adjusting the position of the third blocking part, the third blocking part is pushed by a third adjusting screw, one end of the third adjusting screw is connected to the third blocking part, and the third adjusting screw is threadedly connected to the side wall of the second straight channel.

[0014] To facilitate processing of the second straight channel, a fourth straight channel is further provided in the suction device body. The fourth straight channel is concentrically arranged with the second straight channel. A partition is provided between one end of the fourth straight channel and the second straight channel, and the other end of the fourth straight channel passes through the suction device body.

[0015] To facilitate the processing of the gripper body, the gripper body includes a workpiece clamping plate and a fixed plate that are sealed and connected. A plurality of annular grooves are concentrically provided at the lower end of the workpiece clamping plate. The annular grooves and the upper end surface of the fixed plate form an annular channel. The first straight channel and the second straight channel are both arranged in the fixed plate.

[0016] Preferably, a connecting hole is provided at the center of the lower end surface of the fixing plate, and the connecting hole is used to connect the second straight channel and the negative pressure source.

[0017] Beneficial effects of the present invention:

[0018] 1. The present invention can select the corresponding annular channel to be connected with the negative pressure source by controlling the ventilation state of the first connecting hole and the second connecting hole, so that the workpiece surface corresponding to the upper end surface of the gripper body can be adsorbed and attached through the adsorption hole, and then the workpiece is clamped by negative pressure, so that the solid workpiece can be clamped;

[0019] 2. Both the first straight channel and the second straight channel extend from the center of the annular channel along the radial direction of the outermost annular channel. When the first connecting hole connected to the inner annular channel is in a closed state, the adsorption hole connected to the inner annular channel is in a closed state, thereby adsorbing the workpiece with a hollow structure;

[0020] 3. The present invention will not pollute the reference surface of the gripper, and the effective adsorption radius is adjustable. There is no need to customize the gripper for workpieces of various sizes, which reduces the processing cost, shortens the processing time and ensures the processing accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the workpiece clamping plate of the present invention;

[0023] Figure 2 A bottom view of the workpiece clamping plate of the present invention;

[0024] Figure 3 A top view of a fixed plate of the present invention;

[0025] Figure 4 for Figure 3 AA surface cross-sectional view of ;

[0026] Figure 5 It is a schematic structural diagram of the suction device body of the present invention.

[0027] Marks and corresponding parts names in the attached drawings:

[0028] 1- suction body, 11- workpiece clamping plate, 111- annular groove, 112- adsorption hole, 12- fixing plate, 121- first straight channel, 122- second straight channel, 123- first connecting hole, 124- second connecting hole, 125- third straight channel, 126- connecting hole, 3- first blocking part, 4- second blocking part, 7- third blocking part, 9- fourth straight channel, 10- partition part. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0030] Example

[0031] A universal variable-diameter vacuum gripper comprises a gripper body 1, wherein a plurality of annular channels are concentrically arranged in the gripper body 1, a plurality of adsorption holes 112 are distributed circumferentially in the annular channels, the adsorption holes 112 extend upward to the upper end surface of the gripper body 1, a first straight channel 121 and a second straight channel 122 are arranged in the gripper body 1; the first straight channel 121 and the second straight channel 122 both extend from the center of the annular channel along the radial direction of the outermost annular channel, the first straight channel 121 is provided with a plurality of first connecting holes 123 for connecting the annular channels and a second connecting hole 124 for connecting the second straight channel 122 at intervals along the length direction of the first straight channel 121, the ventilation states of the first connecting holes 123 and the second connecting holes 124 are adjustable, and the second straight channel 122 is used to connect to a negative pressure source.

[0032] Specifically, in conjunction with the accompanying drawings, in order to facilitate the processing of the gripper body 1, the gripper body 1 includes a workpiece clamping plate 11 and a fixed plate 12 that are sealed and connected. A plurality of annular grooves 111 are concentrically provided at the lower end of the workpiece clamping plate 11. The annular grooves 111 and the upper end surface of the fixed plate 12 form an annular channel. The first straight channel 121 and the second straight channel 122 are both arranged in the fixed plate 12.

[0033] Preferably, a connecting hole 126 is provided at the center of the lower end surface of the fixing plate 12 , and the connecting hole 126 is used to connect the second straight channel 122 and the negative pressure source, so as to facilitate the connection of the negative pressure source.

[0034] Among them, in order to facilitate the processing of the first connecting hole 123 and the second connecting hole 124, the first straight channel 121 is located directly above the second straight channel 122, and the first connecting hole 123 and the second connecting hole 124 are concentrically arranged. The first connecting hole 123 extends from the upper end of the fixed disk 12 to the first straight channel 121, and the aperture of the second connecting hole 124 is greater than or equal to the aperture of the first connecting hole 123.

[0035] In addition, as a specific implementation for adjusting the ventilation state of the first connecting hole 123, the first straight channel 121 is provided with a first blocking portion 3 and a second blocking portion 4 at both ends, and the positions of the first blocking portion 3 and the second blocking portion 4 in the length direction of the first straight channel 121 are variable, so that the corresponding annular channel can be selected to communicate with the first straight channel 121 through the positions of the first blocking portion 3 and the second blocking portion 4.

[0036] In order to facilitate the processing of the first straight channel 121, a third straight channel 125 is further provided in the gripper body 1. The third straight channel 125 is arranged concentrically with the first straight channel 121. One end of the third straight channel 125 is connected to the first straight channel 121. The other end of the third straight channel 125 passes through the gripper body 1, and it is also convenient to adjust the positions of the first blocking portion 3 and the second blocking portion 4 respectively. In other words, the channel composed of the first straight channel 121 and the third straight channel 125 passes through the workpiece holding disk 11 along the radial direction of the workpiece holding disk 11.

[0037] As a specific implementation for adjusting the position of the first blocking portion 3 , the first blocking portion 3 is pushed by a first adjusting screw, one end of the first adjusting screw is connected to the first blocking portion 3 , and the first adjusting screw is threadedly connected to the side wall of the first straight channel 121 .

[0038] As a specific implementation of adjusting the position of the second blocking portion 4 , the second blocking portion 4 is pushed by a second adjusting screw, one end of the second adjusting screw is connected to the second blocking portion 4 , and the second adjusting screw is screwed to the third straight channel 125 .

[0039] As a specific implementation for adjusting the ventilation state of the second connecting hole 124 , a third blocking portion 7 is provided in the second straight channel 122 , and the position of the third blocking portion 7 in the length direction of the second straight channel 122 is variable.

[0040] As a specific implementation for adjusting the position of the third blocking part 7 , the third blocking part 7 is pushed by a third adjusting screw, one end of the third adjusting screw is connected to the third blocking part 7 , and the third adjusting screw is threadedly connected to the side wall of the second straight channel 122 .

[0041] In order to facilitate the processing of the second straight channel 122, a fourth straight channel 9 is further provided in the gripper body 1, the fourth straight channel 9 is arranged concentrically with the second straight channel 122, a partition 10 is provided between one end of the fourth straight channel 9 and the second straight channel 122, and the other end of the fourth straight channel 9 passes through the gripper body 1. In other words, the channel composed of the second straight channel 122 and the fourth straight channel 9 passes through the workpiece holding disk 11 in the radial direction of the workpiece holding disk 11.

[0042] The working principle of this embodiment:

[0043] When in use, the second straight channel 122 is connected to the negative pressure source through the connecting hole 126, and the first blocking portion 3 and the third blocking portion 7 are adjusted inward or outward synchronously, so as to control the ventilation state of the first connecting hole 123 and the second connecting hole 124, so as to expand or reduce the effective adsorption diameter of the suction device body 1. The suction hole 112 is used to adsorb and adhere to the corresponding workpiece surface on the upper end surface of the suction device body 1, and then the workpiece is clamped by negative pressure, so as to achieve the clamping of the solid workpiece.

[0044] Among them, the first straight channel 121 and the second straight channel 122 both extend from the center of the annular channel along the radial direction of the outermost annular channel. When the first connecting hole 123 connected to the inner annular channel is in a closed state, that is, the second blocking part 4 is moved outward, the adsorption hole 112 connected to the inner annular channel is in a closed state, thereby adsorbing the workpiece with a hollow structure.

[0045] Therefore, this embodiment can realize rapid adjustment of the adsorption diameter of the gripper, can clamp solid or hollow structured workpieces, and will not contaminate the reference surface of the gripper. There is no need to specially customize grippers for workpieces of various sizes, thereby reducing processing costs, shortening processing time and ensuring the processing accuracy of the workpiece.

[0046] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A general variable-diameter vacuum suction device, including a suction device body (1). A number of annular channels are concentrically arranged inside the suction device body (1). A number of adsorption holes (112) are circumferentially distributed on the annular channels. The adsorption holes (112) extend upward to the upper end surface of the suction device body (1). It is characterized in that a first straight channel (121) and a second straight channel (122) are arranged inside the suction device body (1); both the first straight channel (121) and the second straight channel (122) extend radially from the center of the annular channel along the outermost annular channel. A number of first communication holes (123) for communicating with the annular channel and second communication holes (124) for communicating with the second straight channel (122) are arranged at intervals along the length direction of the first straight channel (121). The ventilation states of the first communication holes (123) and the second communication holes (124) are adjustable. The second straight channel (122) is used for communicating with a negative pressure source; first plugging parts (3) and second plugging parts (4) are respectively arranged at both ends of the first straight channel (121). The positions of the first plugging parts (3) and the second plugging parts (4) in the length direction of the first straight channel (121) are variable; a third straight channel (125) is further arranged inside the suction device body (1). The third straight channel (125) is concentrically arranged with the first straight channel (121). One end of the third straight channel (125) is connected to the first straight channel (121), and the other end of the third straight channel (125) penetrates through the suction device body (1); a third plugging part (7) is arranged inside the second straight channel (122). The position of the third plugging part (7) in the length direction of the second straight channel (122) is variable; a fourth straight channel (9) is further arranged inside the suction device body (1). The fourth straight channel (9) is concentrically arranged with the second straight channel (122). A partition part (10) is arranged between one end of the fourth straight channel (9) and the second straight channel (122). The other end of the fourth straight channel (9) penetrates through the suction device body (1).

2. The general variable-diameter vacuum suction device according to claim 1, it is characterized in that the first plugging part (3) is pushed by a first adjusting screw. One end of the first adjusting screw is connected to the first plugging part (3), and the first adjusting screw is screwed with the side wall of the first straight channel (121).

3. The general variable-diameter vacuum suction device according to claim 1, it is characterized in that the second plugging part (4) is pushed by a second adjusting screw. One end of the second adjusting screw is connected to the second plugging part (4), and the second adjusting screw is screwed with the third straight channel (125).

4. The general variable-diameter vacuum suction device according to claim 1, it is characterized in that the third plugging part (7) is pushed by a third adjusting screw. One end of the third adjusting screw is connected to the third plugging part, and the third adjusting screw is screwed with the side wall of the second straight channel (122).

5. The general variable-diameter vacuum suction device according to claim 1, it is characterized in that The sucker body (1) includes a workpiece clamping disc (11) and a fixed disc (12) that are hermetically connected. A plurality of annular grooves (111) are concentrically provided at the lower end of the workpiece clamping disc (11). The annular grooves (111) and the upper end surface of the fixed disc (12) enclose an annular channel. The first straight channel (121) and the second straight channel (122) are both provided in the fixed disc (12).

6. The universal variable-diameter vacuum sucker according to claim 5, characterized in that, a connection hole (126) is provided at the center position of the lower end surface of the fixed disc (12), and the connection hole (126) is used to connect the second straight channel (122) and a negative pressure source.

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