Vacuum chuck for robot

Abstract

The utility model relates to a vacuum chuck for a robot, and relates to the technical field of robots, the vacuum chuck comprises a connecting column, an air nozzle is arranged on the connecting column, an air cavity is formed in the connecting column, and the air nozzle is communicated with the air cavity; a suction cup is arranged on one side of the connecting column, a vacuum cavity is formed in the inner side of the suction cup, and the vacuum cavity communicates with the air cavity; a pressing assembly is arranged between the suction cup and the connecting column and used for pressing the suction cup on the surface of an object. The suction cup can suck up an object, and the falling risk is reduced.

Description

Technical Field

[0001] The present application relates to the field of robot technology, and in particular to a vacuum suction cup for a robot. Background Art

[0002] With the promotion of automation, robots are usually used to replace manual labor, and existing robots usually use mechanical arms to grasp materials, but this method is only suitable for materials with flat surfaces. For some materials with curved surfaces, the materials are easy to fall off during the grasping process of the mechanical arm.

[0003] The existing Chinese patent with publication number CN106378790A discloses a robot suction cup device, including a suction cup assembly and a suction cup whose inner end is connected to an air circuit, wherein a rigid positioning guide sleeve is connected to the outer end of the suction cup, and the positioning guide sleeve is radially limited by a housing.

[0004] In the related art, the working principle of the suction cup is based on the concept of pressure difference and vacuum. When the suction cup is pressed against a surface and then the air is extracted, it creates a pressure difference between the inside and outside of the suction cup. This pressure difference causes the atmospheric pressure to press the suction cup tightly against the surface, thereby achieving a fixing effect. After the material is moved to the specified position, air is introduced between the suction cup and the material, so that the material can be separated from the suction cup.

[0005] Regarding the above-mentioned related technologies, the inventor believes that when the robot end picks up materials at high speed through a suction cup, the suction cup needs to be pressed against the surface of the object before air can be sucked up. If there is a gap between the suction cup and the surface of the object, the suction cup cannot suck up the object. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a vacuum suction cup for a robot, which solves the technical problem that when the end of the robot picks up materials at high speed through the suction cup, the suction cup needs to be pressed against the surface of the object before air can be sucked up. If there is a gap between the suction cup and the surface of the object, the suction cup cannot suck up the object.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A vacuum suction cup for a robot comprises a connecting column, an air nozzle is arranged on the connecting column, an air cavity is formed inside the connecting column, and the air nozzle is connected to the air cavity; a suction cup is arranged on one side of the connecting column, a vacuum cavity is formed inside the suction cup, and the vacuum cavity is connected to the air cavity; a pressing assembly is arranged between the suction cup and the connecting column, and the pressing assembly is used to press the suction cup against the surface of an object.

[0009] Through the above technical solution, the suction cup is installed on the connecting column, and then the external pipeline is connected to the air nozzle on the connecting column. When the suction cup on the connecting column contacts the object, the pressing component presses the suction cup against the surface of the object, and then the external air pump evacuates the vacuum cavity of the suction cup through the air nozzle and the air cavity. Since the pressing component presses the suction cup against the surface of the object, the suction cup can suck up the object and reduce the risk of falling.

[0010] Furthermore, the pressing assembly includes a connecting rod, one end of which is slidably installed in the air cavity of the connecting column, and the other end of which is connected to the suction cup.

[0011] Through the above technical solution, the suction cup is slidably installed on the connecting column through the connecting rod, thereby reducing the impact of the suction cup and the object when the suction cup contacts the object.

[0012] Furthermore, a pressing spring is provided between the connecting column and the connecting rod, and the pressing spring presses between the connecting column and the connecting rod.

[0013] Through the above technical solution, the pressing spring is pressed between the connecting column and the connecting rod, so that the suction cup can be quickly reset on the connecting column.

[0014] Furthermore, a guide ring is provided at one end of the connecting rod located in the air cavity, the guide ring is connected to the connecting rod, and a sealing ring is provided between the guide ring and the connecting column, the sealing ring is tightly pressed between the guide ring and the inner side wall of the connecting column.

[0015] Through the above technical solution, the sealing ring is pressed tightly between the guide ring and the inner wall of the connecting column, thereby reducing the leakage of gas from between the connecting column and the connecting rod.

[0016] Furthermore, a shock absorbing portion is formed on the suction cup, and the shock absorbing portion is bent toward the outside of the suction cup.

[0017] Through the above technical solution, when the suction cup contacts an object, the shock-absorbing part on the suction cup is compressed, thereby reducing the damage to the suction cup.

[0018] Furthermore, a clamping groove is provided on the suction cup, and a clamping ring is provided on the connecting rod, and the clamping groove on the suction cup is clamped with the clamping ring on the connecting rod.

[0019] Through the above technical solution, the groove on the suction cup is clamped with the clamping ring on the connecting rod, so that the convenience of replacing the suction cup is improved.

[0020] Furthermore, an external thread is formed on the outer side of the connecting column, and a connecting nut is provided on the connecting column, and the connecting nut is threadedly connected to the external thread on the connecting column.

[0021] Through the above technical solution, the connecting nut is threadedly connected to the external thread of the connecting column, thereby improving the convenience of installing the connecting column.

[0022] In summary, the present application includes at least one of the following beneficial technical effects of a vacuum suction cup for a robot:

[0023] 1. The suction cup is installed on the connecting column, and then the external pipeline is connected to the air nozzle on the connecting column. When the suction cup on the connecting column contacts the object, the pressing component presses the suction cup against the surface of the object, and then the external vacuum pump evacuates the vacuum cavity of the suction cup through the air nozzle and the air cavity. Since the pressing component presses the suction cup against the surface of the object, the suction cup can suck up the object, reducing the risk of falling;

[0024] 2. Through the setting of the connecting rod and the pressing spring, the suction cup can be pressed against the surface of the object, reducing the gap between the suction cup and the surface of the object;

[0025] 3. The convenience of installing the suction cup is improved by connecting the connecting nut with the external thread on the connecting column and clamping the groove on the suction cup with the clamping ring on the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This embodiment mainly embodies a schematic diagram of the overall structure of a vacuum suction cup for a robot;

[0027] Figure 2 This is a cross-sectional view of the connecting column structure mainly embodied in this embodiment;

[0028] Figure 3 It is an exploded schematic diagram of the connecting column structure mainly embodied in this embodiment.

[0029] Figure numerals: 1. connecting column; 11. air nozzle; 12. air cavity; 13. external thread; 14. connecting nut; 2. suction cup; 21. slot; 22. vacuum chamber; 23. shock absorbing part; 3. pressing assembly; 31. connecting rod; 311. through hole; 312. supporting surface; 32. guide ring; 321. sealing ring; 33. retaining ring; 34. tightening spring. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] An embodiment of the present application discloses a vacuum suction cup for a robot.

[0033] Reference Figure 1A vacuum suction cup for a robot includes a connecting column 1, on which an air nozzle 11 is arranged. When in use, an external air extraction pipeline is connected to the air nozzle 11, and when in use, the external air extraction pipeline extracts air from the air nozzle 11. A suction cup 2 is installed on the connecting column 1, and a pressing component 3 is arranged between the suction cup 2 and the connecting column 1, and the pressing component 3 presses the suction cup 2 on the surface of an object.

[0034] The connecting column 1 is cylindrical in shape as a whole, and an air cavity 12 is formed in the connecting column 1 , and the air nozzle 11 is connected to the air cavity 12 .

[0035] Reference Figure 2 The pressing assembly 3 includes a connecting rod 31, which is in the shape of a round rod as a whole, and the axis of the connecting rod 31 is coaxial with the connecting column 1. In addition, one end of the connecting rod 31 penetrates into the air cavity 12 from the side of the connecting column 1 relative to the air nozzle 11.

[0036] A guide ring 32 is provided at one end of the connecting rod 31 that penetrates the air cavity 12. The guide ring 32 is coaxial with the connecting rod 31. When the connecting rod 31 slides in the connecting column 1, the guide ring 32 guides the sliding of the connecting rod 31. In addition, a sealing ring 321 is provided between the guide ring 32 and the inner side wall of the connecting column 1. One side of the sealing ring 321 is connected to the guide ring 32, and the other side is pressed against the inner side wall of the connecting column 1. When the guide ring 32 slides, the sealing ring 321 seals the gap between the guide ring 32 and the connecting column 1. This reduces the gas from overflowing from the gap between the guide ring 32 and the connecting column 1.

[0037] Reference Figure 3 A snap ring 33 is provided at one end of the connecting rod 31 away from the connecting column 1. The snap ring 33 is annular as a whole, and the axis of the snap ring 33 is coaxial with the axis of the connecting rod 31. The snap ring 33 is integrally formed and connected to the connecting rod 31. Further, a clamping groove 21 is provided on the suction cup 2. When in use, the clamping groove 21 on the suction cup 2 is clamped on the clamping ring 33 of the connecting rod 31. The suction cup 2 is clamped on the clamping ring 33 of the connecting rod 31 through the clamping groove 21, thereby improving the convenience of installing the suction cup 2 on the connecting rod 31.

[0038] A vacuum chamber 22 is formed on the inner side of the suction cup 2, and a through hole 311 is formed on the connecting rod 31. The through hole 311 of the connecting rod 31 connects the vacuum chamber 22 of the suction cup 2 and the air chamber 12 in the connecting column 1. When the external vacuum device performs vacuuming, the gas in the vacuum chamber 22 of the suction cup 2 passes through the through hole 311 on the connecting rod 31 and the air chamber 12 in the connecting column 1 in turn, and is finally discharged from the air nozzle 11.

[0039] In the process of using the suction cup 2 to pick up an object, the suction cup 2 will inevitably collide with the object. In order to protect the object from damage, the suction cup 2 is also protected from damage. Therefore, a support surface 312 is formed on the connecting rod 31, and the support surface 312 is arranged horizontally as a whole. A tightening spring 34 is sleeved on the connecting rod 31, and one end of the tightening spring 34 is pressed against the support surface 312 of the connecting rod 31, and the other end is pressed against the connecting column 1. When the suction cup 2 hits the object, the tightening spring 34 is compressed, and the suction cup 2 and the connecting rod 31 are contracted into the air cavity 12 of the connecting column 1. In addition, since the tightening spring 34 provides a reaction force to the connecting rod 31 during the compression process, this reaction can help the suction cup 2 to better press against the surface of the object, reduce the gap between the suction cup 2 and the surface of the object, and enable the air in the suction cup 2 to be better drawn out.

[0040] Furthermore, a shock absorbing portion 23 is formed on the suction cup 2, and the shock absorbing portion 23 is located in the middle of the suction cup 2, and the shock absorbing portion 23 protrudes toward the outside of the suction cup 2. When the suction cup 2 is pressed against the surface of an object, the shock absorbing portion 23 on the suction cup 2 is compressed. On the one hand, the shock absorbing portion 23 can reduce the damage to the object during the picking process, and on the other hand, the shock absorbing portion 23 can also protect the suction cup 2 and reduce the damage to the suction cup 2 during use.

[0041] In addition, in order to improve the convenience of installation of the connecting column 1, an external thread 13 is provided on the connecting column 1, and a connecting nut 14 is provided on the connecting column 1. Two connecting nuts 14 are provided at intervals on the connecting column 1, and the two connecting nuts 14 are both threadedly connected to the external thread 13 of the connecting column 1. When in use, firstly thread one connecting nut 14 on the connecting column 1, then pass the connecting column 1 through the object to be installed, and then thread another connecting nut 14 on the side of the connecting column 1 passing through the object, and then tighten the two connecting nuts 14 so that the two connecting nuts 14 can clamp the object.

[0042] The implementation principle of a vacuum suction cup 2 for a robot in an embodiment of the present application is as follows: the connecting column 1 is installed on the robot through two connecting nuts 14, and then connected to the air nozzle 11 using an external air extraction pipeline. During use, the robot drives the suction cup 2 to pick up an object. During the picking process, the suction cup 2 is pressed against the surface of the object. At this time, the suction cup 2 and the connecting rod 31 are contracted on the connecting column 1, and at the same time, the pressing spring 34 and the shock absorbing part 23 are compressed. Then, the air extraction device extracts the air in the vacuum cavity 22 of the suction cup 2 through the air nozzle 11, the air cavity 12 and the through hole 311 on the connecting rod 31. After the object moves to the specified position, the vacuum cavity 22 is inflated with gas to allow the suction cup 2 to be separated from the object.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vacuum suction cup for a robot, comprising a connecting column (1), characterized in that: The connecting column (1) is provided with an air nozzle (11), and an air cavity (12) is formed in the connecting column (1), and the air nozzle (11) is in communication with the air cavity (12); A suction cup (2) is provided on one side of the connecting column (1), a vacuum cavity (22) is formed on the inner side of the suction cup (2), and the vacuum cavity (22) is connected to the air cavity (12); A pressing component (3) is provided between the suction cup (2) and the connecting column (1), and the pressing component (3) is used to press the suction cup (2) onto the surface of an object.

2. A vacuum suction cup for a robot according to claim 1, characterized in that: The pressing assembly (3) comprises a connecting rod (31), one end of which is slidably mounted in the air cavity (12) of the connecting column (1), and the other end of which is connected to the suction cup (2).

3. A vacuum suction cup for a robot according to claim 2, characterized in that: A pressing spring (34) is provided between the connecting column (1) and the connecting rod (31), and the pressing spring (34) is pressed between the connecting column (1) and the connecting rod (31).

4. A vacuum suction cup for a robot according to claim 2, characterized in that: A guide ring (32) is provided at one end of the connecting rod (31) located in the air cavity (12); the guide ring (32) is connected to the connecting rod (31); and a sealing ring (321) is provided between the guide ring (32) and the connecting column (1); the sealing ring (321) is tightly pressed between the guide ring (32) and the inner side wall of the connecting column (1).

5. A vacuum suction cup for a robot according to claim 2, characterized in that: A shock absorbing portion (23) is formed on the suction cup (2), and the shock absorbing portion (23) is bent toward the outside of the suction cup (2).

6. A vacuum suction cup for a robot according to claim 5, characterized in that: The suction cup (2) is provided with a clamping groove (21), the connecting rod (31) is provided with a clamping ring (33), and the clamping groove (21) on the suction cup (2) is clamped with the clamping ring (33) on the connecting rod (31).

7. A vacuum suction cup for a robot according to claim 1, characterized in that: An external thread (13) is formed on the outer side of the connecting column (1), and a connecting nut (14) is provided on the connecting column (1), wherein the connecting nut (14) is threadedly connected to the external thread (13) on the connecting column (1).

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