A pumpless electric vacuum suction cup device

Abstract

The present invention relates to a pumpless electric vacuum suction cup device, comprising a shell, a vacuum generating mechanism, a linear screw motor, a solenoid valve, a vacuum pressure sensor, a circuit board and an air source distributor are arranged in the shell, the vacuum generating mechanism comprises a vacuum chamber, one end of a bellows is installed at both ends of the vacuum chamber through a cover plate, the other end of the bellows is a sealing structure and is fixedly installed on the inner wall of the shell, two through holes are arranged in the vacuum chamber, one of the through holes is connected to the air inlet on the vacuum chamber, and the other through hole is connected to the air outlet on the vacuum chamber, one check valve 1 and one check valve 3 are respectively installed in the through holes at the upper and lower ends of the air inlet, and one check valve 2 and one check valve 4 are respectively installed in the through holes at the upper and lower ends of the air outlet. The present invention adopts a pumpless design, and the linear screw motor drives the vacuum chamber to make a linear reciprocating motion, and drives the bellows to move back and forth to continuously pump air to generate a vacuum. The modular design greatly improves the integration of the system, and the structure is simple, the cost is low and the noise is low.

Description

Technical Field

[0001] The invention relates to the field of vacuum suction cup devices, and in particular to a pump-free electric vacuum suction cup device. Background Art

[0002] Compared with traditional mechanical clamping technology, vacuum suction cups can absorb some workpieces with flat surfaces that cannot be clamped, such as glass, plates or cartons and other large-sized, lightweight and regular flat objects. Existing vacuum suction cup systems basically use vacuum pumps or air compressors + vacuum generators to generate vacuum. These two methods can maintain a high vacuum degree, but the structure is relatively complex, with more components, high control difficulty, high noise and high cost. Summary of the invention

[0003] The object of the present invention is to provide a pumpless electric vacuum suction cup device to solve the problems of complex structure, high noise and high cost of the vacuum suction cup system in the prior art.

[0004] The present invention provides a pumpless electric vacuum suction cup device, comprising a housing, wherein a vacuum generating mechanism, a linear screw motor, a solenoid valve, a circuit board and an air source distributor are arranged in the housing, and the linear screw motor, the solenoid valve, the circuit board and the air source distributor are mounted on the inner wall of the housing;

[0005] The vacuum generating mechanism comprises a vacuum chamber, one end of a bellows is installed at both upper and lower ends of the vacuum chamber through a cover plate, the other end of the bellows is a sealing structure and is fixedly installed on the inner wall of the shell, two through holes are arranged in the vacuum chamber, one of the through holes is connected to the air inlet on the vacuum chamber, and the other through hole is connected to the air outlet on the vacuum chamber, a one-way valve 1 and a one-way valve 3 are installed in the through holes at the upper and lower ends of the air inlet respectively, and a one-way valve 2 and a one-way valve 4 are installed in the through holes at the upper and lower ends of the air outlet respectively;

[0006] The screw thread of the linear screw motor is installed with a connecting piece, the connecting piece is fixedly installed with the vacuum chamber, and the linear screw motor drives the connecting piece to drive the vacuum chamber to move up and down;

[0007] The gas source distributor is provided with gas pipe 1, gas pipe 2 and gas pipe 3, the other end of gas pipe 1 is connected to the air inlet of the vacuum chamber, the other end of gas pipe 2 is connected to the solenoid valve, and gas pipe 3 is connected to the suction cup module;

[0008] The solenoid valve and the linear screw motor are electrically connected to the circuit board.

[0009] Furthermore, an air pipe four is installed on the air source distributor, the other end of the air pipe four is connected to a pressure sensor, and the pressure sensor is connected to a circuit board.

[0010] Furthermore, the connecting piece is an "L"-shaped structure.

[0011] Furthermore, the suction cup module includes a suction cup adapter and a plurality of suction cups, the tops of the suction cups are sealed and connected to the suction cup adapter, and the suction cup adapter is fixedly mounted on the shell and sealed and connected to air pipe three.

[0012] The beneficial effects of adopting the above technical solution of the present invention are:

[0013] The present invention adopts a pumpless design, and drives the vacuum chamber to perform linear reciprocating motion through a linear screw motor, driving the bellows to move back and forth to continuously pump air to generate a vacuum. The modular design greatly improves the integration of the system, and has a simple structure, low cost and low noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the pumpless electric vacuum suction cup device of the present invention;

[0015] Figure 2 The internal structure of the pumpless electric vacuum suction cup device of the present invention is shown in FIG. Figure 1 ;

[0016] Figure 3 The internal structure of the pumpless electric vacuum suction cup device of the present invention is shown in FIG. Figure 2 ;

[0017] Figure 4 It is a schematic diagram of the structure of the vacuum generating mechanism of the present invention;

[0018] Figure 5 It is a cross-sectional view of the vacuum generating mechanism of the present invention;

[0019] Figure 6 It is a schematic structural diagram of a multi-suction cup type pumpless electric vacuum suction cup device of the present invention;

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1-housing, 2-linear screw motor, 3-solenoid valve, 4-circuit board, 5-gas source distributor, 6-vacuum chamber, 7-cover plate, 8-bellows, 9-air inlet, 10-air outlet, 11-one-way valve 1, 12-one-way valve 3, 13-one-way valve 2, 14-one-way valve 4, 15-connecting part, 16-trachea 1, 17-trachea 2, 18-trachea 3, 19-suction cup module, 1901-suction cup adapter, 1902-suction cup, 20-trachea 4, 21-pressure sensor. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0023] like Figure 1-3 As shown, the present invention provides a pumpless electric vacuum suction cup device, comprising a housing 1, wherein a vacuum generating mechanism, a linear screw motor 2, a solenoid valve 3, a circuit board 4 and an air source distributor 5 are arranged in the housing 1, and the linear screw motor 2, the solenoid valve 3, the circuit board 4 and the air source distributor 5 are installed on the inner wall of the housing 1;

[0024] like Figure 4-5 As shown, the vacuum generating mechanism includes a vacuum chamber 6, and one end of a bellows 8 is installed at both upper and lower ends of the vacuum chamber 6 through a cover plate 7, and the other end of the bellows 8 is a sealing structure and is fixedly installed on the inner wall of the housing 1. Two through holes are arranged in the vacuum chamber 6, one of which is connected to the air inlet 9 on the vacuum chamber 6, and the other through hole is connected to the air outlet 10 on the vacuum chamber 6. A one-way valve 11 and a one-way valve 3 12 are installed in the through holes at the upper and lower ends of the air inlet 9, respectively, and a one-way valve 2 13 and a one-way valve 4 14 are installed in the through holes at the upper and lower ends of the air outlet 10, respectively.

[0025] The screw thread of the linear screw motor 2 is installed with a connecting piece 15, and the connecting piece 15 is fixedly installed with the vacuum chamber 6. The linear screw motor 2 drives the connecting piece 15 to drive the vacuum chamber 6 to move up and down;

[0026] The air source distributor 5 is installed with an air pipe 16, an air pipe 2 17, and an air pipe 3 18, the other end of the air pipe 16 is connected to the air inlet 9 of the vacuum chamber 6, the other end of the air pipe 2 17 is connected to the solenoid valve 3, and the air pipe 3 18 is connected to the suction cup module 19;

[0027] The solenoid valve 3 and the linear screw motor 2 are electrically connected to the circuit board 4 , and the circuit board 4 controls the switch of the solenoid valve 3 and the reciprocating rotation of the linear screw motor 2 .

[0028] In this embodiment, the linear screw motor 2 is started to drive the screw to rotate, and the screw rotates forward and reversely to drive the vacuum chamber 6 to move up and down. When the vacuum chamber 6 moves downward, the bellows 8 at the upper end is stretched, and the air pressure in the upper bellows 8 is less than the external atmospheric pressure. The air in the suction cup module 19 enters the upper bellows 8 through the air pipe three 18, the air pipe one 16 and the one-way valve one 11 in sequence. At the same time, the lower bellows 8 is compressed, and the air in the lower bellows 8 is discharged to the outside through the one-way valve four 14 and the air outlet 10 of the vacuum chamber 6. At the same time, the one-way valve two 13 and the one-way valve three 12 are closed; when the vacuum chamber 6 moves upward, the upper bellows 8 is compressed, and the air previously drawn in passes through the one-way valve two 1 3 is discharged to the outside, and at the same time, the lower end bellows 8 is stretched, and the air in the suction cup module 19 enters the lower end bellows 8 through air pipe three 18, air pipe one 16 and one-way valve three 12 in turn. At the same time, one-way valve one 11 and one-way valve four 14 are closed, so that the linear screw motor 2 drives the screw to rotate forward and reverse, thereby driving the vacuum chamber 6 to reciprocate up and down, and the upper and lower bellows 8 are alternately stretched and compressed, which can continuously pump air regardless of the situation to generate a vacuum. A vacuum is generated in the suction cup module 19 to achieve the adsorption of the object. When the suction cup module 19 needs to release the object, the solenoid valve 3 is energized, and the outside air enters the suction cup module 19 through air pipe two 17, and the suction cup module 19 releases the vacuum and releases the object.

[0029] If one of the bellows 8 is damaged, as long as the system vacuum is within the pressure range that the one-way valve can withstand and the one-way valve is not damaged, the vacuum in the suction cup module 19 will not be destroyed. When the linear screw motor 2 moves, it can also drive the other bellows 8 to continue to generate vacuum. The double bellows 8 design increases the redundancy function of the device and improves the reliability of the vacuum generation of the device.

[0030] The linear screw motor 2 is used to drive the system, rather than the traditional vacuum pump or air compressor + vacuum generator, which greatly simplifies the overall structure; the system has fewer components and lower costs; the air flow rate in the system is lower, and the noise is greatly reduced compared to traditional vacuum adsorption devices.

[0031] Preferably, an air pipe 20 is also installed on the air source distributor 5, and the other end of the air pipe 20 is connected to a pressure sensor 21. The pressure sensor 21 detects and displays the internal gas pressure of the air source distributor 5 in real time. When it is detected that the vacuum pressure in the system drops, it will be fed back to the control system, so that the linear screw motor 2 continues to drive the vacuum chamber 6 to perform linear reciprocating motion to replenish the vacuum.

[0032] Specifically, the connecting member 15 is an "L"-shaped structure.

[0033] The suction cup module 19 includes a suction cup adapter 1901 and a plurality of suction cups 1902. The tops of the suction cups 1902 are sealed and connected to the suction cup adapter 1901. The suction cup adapter 1901 is fixedly mounted on the housing 1 and is sealed and connected to the air pipe 3 18. Multiple suction cups 1902 can be selected, such as two, three, four or even more suction cups 1902, to achieve greater suction force to meet the needs of different scenarios. Figure 6 The schematic diagram of the structure of a pumpless electric vacuum suction cup device with four suction cups.

[0034] Two bellows 8 placed opposite to each other are arranged in the vacuum generating mechanism, and the vacuum pressure generated inside can offset each other to some extent. The linear screw motor 2 only needs to bear the gravity of the vacuum chamber 6 and the connecting parts, the elastic damping of the bellows 8 and the vacuum pressure generated by the volume difference of the bellows 8. The load of the linear screw motor 2 does not increase with the increase of the vacuum degree, so only a very small thrust is needed to generate a large vacuum degree.

[0035] The electric suction cup system is very simple to control, and the system exhaust volume and the generated vacuum degree only need one linear screw motor 2 to control, which greatly reduces the control difficulty compared with the traditional vacuum system.

[0036] In summary, the present invention adopts a pumpless design, which drives the vacuum chamber to perform linear reciprocating motion through a linear screw motor, and drives the bellows to move back and forth to continuously pump air to generate a vacuum. The modular design greatly improves the integration of the system, and has a simple structure, low cost and low noise.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pumpless electric vacuum suction cup device, characterized in that: It comprises a shell, in which a vacuum generating mechanism, a linear screw motor, a solenoid valve, a circuit board and an air source distributor are arranged, and the linear screw motor, the solenoid valve, the circuit board and the air source distributor are mounted on the inner wall of the shell; The vacuum generating mechanism comprises a vacuum chamber, one end of a bellows is installed at both upper and lower ends of the vacuum chamber through a cover plate, the other end of the bellows is a sealing structure and is fixedly installed on the inner wall of the shell, two through holes are arranged in the vacuum chamber, one of the through holes is connected to the air inlet on the vacuum chamber, and the other through hole is connected to the air outlet on the vacuum chamber, a one-way valve 1 and a one-way valve 3 are installed in the through holes at the upper and lower ends of the air inlet respectively, and a one-way valve 2 and a one-way valve 4 are installed in the through holes at the upper and lower ends of the air outlet respectively; The screw thread of the linear screw motor is installed with a connecting piece, the connecting piece is fixedly installed with the vacuum chamber, and the linear screw motor drives the connecting piece to drive the vacuum chamber to move up and down; The gas source distributor is provided with gas pipe 1, gas pipe 2 and gas pipe 3, the other end of gas pipe 1 is connected to the air inlet of the vacuum chamber, the other end of gas pipe 2 is connected to the solenoid valve, and gas pipe 3 is connected to the suction cup module; The solenoid valve and the linear screw motor are electrically connected to the circuit board.

2. The pumpless electric vacuum suction cup device according to claim 1, characterized in that: An air pipe four is also installed on the air source distributor, and the other end of the air pipe four is connected to a pressure sensor, and the pressure sensor is connected to a circuit board.

3. The pumpless electric vacuum suction cup device according to claim 1, characterized in that: The connecting piece is an "L" shaped structure.

4. The pumpless electric vacuum suction cup device according to claim 1, characterized in that: The suction cup module includes a suction cup adapter and a plurality of suction cups, the tops of the suction cups are all sealed and connected to the suction cup adapter, and the suction cup adapter is fixedly mounted on the shell and sealed and connected to air pipe three.

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