A high-precision flexible suction head

Abstract

The present invention discloses a high-precision flexible suction head, including an outer sleeve, a sliding cavity formed in the outer sleeve, a sliding piston assembly slidingly arranged in the sliding cavity, an air nozzle arranged on the outer sleeve, an air outlet pipeline formed on the air nozzle, the air outlet pipeline connecting the outside and the sliding cavity, an air charging pipeline formed along the sliding piston assembly, the air charging pipeline connecting the sliding cavity and the outside, and a buffer for air pressure buffering arranged on the sliding piston assembly. The present invention designs a negative pressure suction nozzle for SMT machines and SMT machines, which is used for adsorbing electronic components, utilizing air pressure changes for adsorption, having a gentle action and not easily damaging electronic components, and at the same time, through the control of air pressure, the accuracy of the adsorption force is easy to control, with good use effect and strong practicality.

Description

Technical Field

[0001] The invention relates to the field of mechanical technology, and in particular to a high-precision flexible suction head. Background Art

[0002] Chip mounters and placement machines are essential equipment in the field of electronic product production, used to place corresponding precision parts. The placement action includes movement and rotation in three spatial dimensions, and it is necessary to "grab" and "place" objects through adsorption. Since electronic products are precision-made products, the requirements for action accuracy are very high, so it is necessary to design a special suction head mechanism to be assembled in the corresponding machine. Summary of the invention

[0003] In view of the above problems, the present invention provides a high-precision flexible suction head.

[0004] The technical solution of the present invention is as follows: a high-precision flexible suction head, comprising an outer sleeve, a sliding cavity formed in the outer sleeve, a sliding piston assembly slidingly arranged in the sliding cavity, an air nozzle arranged on the outer sleeve, an air outlet pipeline formed on the air nozzle, the air outlet pipeline connecting the outside and the sliding cavity, an inflation pipeline formed along the sliding piston assembly, the inflation pipeline connecting the sliding cavity and the outside, and a buffer for air pressure buffering arranged on the sliding piston assembly.

[0005] By adopting the above technical scheme, the objects are placed down or adsorbed by inflating or exhausting the sliding cavity. Specifically, the inflating or exhausting is carried out through the inflating pipeline. Since the inflating or exhausting of the sliding cavity will cause the piston assembly to slide in the sliding cavity, the piston assembly is arranged to slide with the sliding cavity. Since the piston assembly produces reciprocating motion in the sliding cavity by receiving positive and negative air pressure, when the air pressure increases due to external influences due to non-active air pressure change operation, a buffer is provided to buffer and avoid reverse action on the device for inflating. The strength of the buffer itself is set to control the force range of the buffer. Through the scheme in the present invention, a piston-type mechanism is used as a suction head, and the effect of variable adsorption force (through the change of inflation or exhaust, the adsorption force can change positively or negatively) is formed by the change of internal air pressure, the control accuracy is high, and the adsorption is carried out by the change of air pressure. The contact effect is relatively soft and it is not easy to cause damage to the workpiece. At the same time, a buffer is provided in the structure to form a buffer effect when it is reversely acted by the other party.

[0006] Furthermore, the sliding piston assembly includes a sliding shaft, the sliding shaft is tubular, and the internal pipeline serves as the inflation pipeline. The sliding shaft is sheathed with a piston sleeve, which contacts and slides with the inner wall of the sliding cavity. In this preferred embodiment, the structural form of the sliding piston assembly is specifically given, and the piston sleeve is provided to slide to ensure that the negative pressure effect is achieved in the structure. At the same time, the piston sleeve is supported by the sliding shaft. The sliding shaft is selected to be tubular, and the tubular characteristics are used to form an inflation pipeline for inflation. The structural setting is ingenious and reasonable.

[0007] Furthermore, the piston sleeve is slidably matched with the outer wall of the sliding shaft and is sealed. In this preferred embodiment, the sliding match between the piston sleeve and the sliding shaft makes it possible for the position of the sliding shaft to remain unchanged when the piston sleeve slides back and forth under the action of gas pressure, so that the sliding shaft can be fixedly arranged. The piston sleeve and the sliding shaft are sealed to ensure that there is no air leakage, thereby not affecting the gas pressure in the sliding chamber.

[0008] Furthermore, a ball is arranged between the piston sleeve and the sliding shaft, and a ball rack is arranged at the corresponding position of the ball for support. In this preferred embodiment, the sliding fit between the piston sleeve and the sliding shaft is achieved by arranging a ball between the piston sleeve and the sliding shaft. Based on the arrangement of the ball, a ball rack is arranged for support. By arranging the ball as a sliding fit structure, it has the advantages of good sliding stability and strong impact resistance.

[0009] Furthermore, a sealing sleeve is provided between the piston sleeve and the sliding shaft, and the sealing sleeve is close to the air outlet pipe relative to the ball. In this preferred embodiment, the sealing sleeve is provided as a component of the sealing structure, which has an airtight effect while not interfering with the sliding fit, thereby avoiding air leakage inside the sliding cavity.

[0010] Furthermore, a gap is maintained between the piston sleeve and the sliding shaft to accommodate the balls, the ball rack and the sealing sleeve, and the inner wall of the piston sleeve is provided with a ball groove corresponding to the balls. In this preferred embodiment, sufficient gap is provided in the structure to accommodate the balls, the ball rack and the sealing sleeve to avoid interference, which is conducive to improving the ease of assembly. The provision of the ball groove further ensures the stability of the linear relative movement between the piston sleeve and the sliding shaft, and plays a role in guiding the sliding track.

[0011] Furthermore, a limit spring is provided at the end of the sliding shaft near the air outlet pipe, and the limit spring is provided between the sliding shaft and the piston sleeve to limit the piston sleeve. In this preferred embodiment, the limit spring is provided to limit the piston sleeve to prevent the piston sleeve from sliding beyond the range.

[0012] Furthermore, a spring is sleeved on the piston sleeve, and the spring serves as the buffer, and one end of the spring abuts against the piston sleeve, and the other end abuts against the sliding shaft. In this preferred embodiment, the spring is provided as a buffer to help buffer the movement of the piston sleeve, and the range of the buffering effect is determined by setting the strength of the spring.

[0013] Furthermore, the sliding cavity and the air outlet pipeline are both in a straight tubular shape, and the sliding cavity and the air outlet pipeline are coaxially arranged. In this preferred embodiment, a setting structure of the sliding cavity and the air outlet pipeline is provided, which is convenient for adsorption by air pressure changes.

[0014] Further, the air nozzle is located at the end of the outer sleeve, and the outer diameter of the air nozzle is smaller than the outer diameter of the outer sleeve body, and an annular groove is formed on the outer circumference of the air nozzle. This preferred embodiment provides a structural form of the air nozzle, which is convenient for the whole product to be connected to the mechanical device.

[0015] Beneficial effects: The present invention provides novel concept, reasonable design and easy use. The present invention designs a negative pressure suction nozzle for a placement machine and a placement machine, which is used to adsorb electronic components and utilizes air pressure changes for adsorption. The action is gentle and it is not easy to damage electronic devices. At the same time, through the control of air pressure, the accuracy of the adsorption force is easy to control, the use effect is good, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0017] Figure 2 yes Figure 1 Schematic diagram of the AA cross-sectional structure. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0019] refer to Figure 1-Figure 2A high-precision flexible suction head has an outer sleeve 100, a sliding cavity 110 is formed in the outer sleeve 100, a sliding piston assembly 200 is slidably arranged in the sliding cavity 110, an air nozzle 120 is arranged on the outer sleeve 100, an air outlet pipeline 121 is formed on the air nozzle 120, the air outlet pipeline 121 connects the outside and the sliding cavity 110, an air charging pipeline 210 is formed along the sliding piston assembly 200, the air charging pipeline 210 connects the sliding cavity 110 and the outside, and a buffer 300 for air pressure buffering is arranged on the sliding piston assembly 200. Preferably, the sliding piston assembly 200 includes a sliding shaft 220, the sliding shaft 220 is tubular, and the internal pipeline is used as the air charging pipeline 210, the sliding shaft 220 is covered with a piston sleeve 230, the piston sleeve 230 contacts the inner wall of the sliding cavity 110 and slides in cooperation. Preferably, the piston sleeve 230 is slidably matched with the outer wall of the sliding shaft 220 and is sealed and connected. Preferably, a ball 240 is arranged between the piston sleeve 230 and the sliding shaft 220, and a ball holder 250 is provided at the ball 240 for support. Preferably, a sealing sleeve 260 is also provided between the piston sleeve 230 and the sliding shaft 220, and the sealing sleeve 260 is close to the air outlet pipe 121 relative to the ball 240. Preferably, a gap is maintained between the piston sleeve 230 and the sliding shaft 220 to accommodate the ball 240, the ball holder 250 and the sealing sleeve 260, and the inner wall of the piston sleeve 230 is provided with a ball groove corresponding to the ball 240. Preferably, a limit retaining spring 270 is provided at the end of the sliding shaft 220 close to the air outlet pipe 121, and the limit retaining spring 270 is provided between the sliding shaft 220 and the piston sleeve 230 to limit the piston sleeve 230. Preferably, a spring is sleeved on the piston sleeve 230, and the spring serves as a buffer 300. Preferably, the sliding chamber 110 and the air outlet pipeline 121 are both straight tube-shaped, and the sliding chamber 110 and the air outlet pipeline 121 are coaxially arranged. Preferably, the air nozzle 120 is located at the end of the outer sleeve 100, and the outer diameter of the air nozzle 120 is smaller than the outer diameter of the outer sleeve 100 body, and an annular groove is formed on the outer periphery of the air nozzle 120.

[0020] In the specific implementation process, the outer sleeve 100 and the sliding piston assembly 200 slide together to form a mechanism that can generate negative pressure, specifically, the electronic device is adsorbed by air pressure through the air outlet pipe 121 on the air nozzle 120. In the specific implementation, the sliding cavity 110 is positively or negatively inflated through the air filling pipe 210 to adsorb. The control of the inflation depends on the air pump connected to the outside. Figure 2 As shown, the sliding chamber 110 and the air outlet pipe 121 are in a straight tubular shape, which facilitates the linear movement of the sliding piston assembly 200 arranged inside, and the movement is smooth. At the same time, the air pressure change at the air nozzle position is also smooth. The position of the air nozzle 120 is as shown in FIG. Figure 2As shown, at the end of the main body of the outer sleeve 100, the position is opposite to the piston assembly 200, which is convenient for use. At the same time, a ring groove is provided on the air nozzle 120 to facilitate assembly during use.

[0021] In specific implementation, the sliding piston assembly 200 completes its function by sliding relative to the outer sleeve 100. Since this structure can have a variety of structural forms in realizing the sliding with the outer sleeve 100, its contact surface can be moved by contacting with a bearing ball, or it can be a similar slide rail mechanism with direct surface contact. Since it is widely present in the prior art, it is not listed here one by one. As for the structure of the inflation for the air pressure problem, as long as there is an inflation pipeline 210, it can be placed in a variety of specific settings, which are not listed here one by one. In specific use, if the inflation pressure is constant, there may be an external influence at the outlet pipeline 121, causing the air pressure in the sliding chamber 110 to be too high, so a buffer 300 is provided to buffer the reverse effect caused by the air pressure. The threshold of the buffer 300 is set to buffer the pressure change within the moving range. The selection of the buffer 300 can adopt a variety of components, such as springs, elastic materials (such as silicone, rubber and other polymer materials, etc.) and cylinders. Therefore, any product in the prior art is used as the reset mechanism of the outer sleeve 100 in this solution within the protection scope of this solution. In the specific implementation process, the buffer 300 can be implemented by a spring, and the pressure threshold of the spring as a buffer device is set to 5 Newtons.

[0022] In the specific implementation process, a structural form of a sliding piston assembly 200 is specifically provided, which specifically includes a sliding shaft 220, a piston sleeve 230, a ball 240, a ball holder 250, a sealing sleeve 260 and a limit spring 270. The above components are assembled to form a whole. In order to ensure the linear guidance of the ball 240 when rolling, a ball groove is provided. In the specific implementation, the outer sleeve 100, the piston sleeve 230 and the sliding shaft 220 can all be made of metal. The function of the sealing sleeve 260 is airtight, so it can be made of materials commonly used for sealing rings such as rubber and silicone, but according to the development of related technologies, it is not limited to these two materials.

[0023] In combination with the above technical solutions, in the specific use process of the present invention, positive or negative air pressure is applied through the air-filled pipe 210 on the sliding shaft 220, and the effect of adsorbing electronic devices is achieved by reasonably controlling the air pressure. Since the input of air pressure can be precisely controlled, the adsorption force can also be precisely controlled.

[0024] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A high-precision flexible suction tip, characterized in that: The invention comprises an outer sleeve (100), wherein a sliding cavity (110) is formed in the outer sleeve (100), a sliding piston assembly (200) is slidably arranged in the sliding cavity (110), an air nozzle (120) is arranged on the outer sleeve (100), an air outlet pipeline (121) is formed on the air nozzle (120), the air outlet pipeline (121) is connected to the outside and the sliding cavity (110), an air charging pipeline (210) is formed along the sliding piston assembly (200), the air charging pipeline (210) is connected to the sliding cavity (110) and the outside, and a buffer (300) for air pressure buffering is arranged on the sliding piston assembly (200); The sliding piston assembly (200) comprises a sliding shaft (220), the sliding shaft (220) is tubular, and the internal pipeline serves as the inflation pipeline (210), the sliding shaft (220) is sheathed with a piston sleeve (230), and the piston sleeve (230) contacts and slides with the inner wall of the sliding cavity (110); A limit clamping spring (270) is provided at the end of the sliding shaft (220) close to the air outlet pipeline (121), and the limit clamping spring (270) is provided between the sliding shaft (220) and the piston sleeve (230) to limit the position of the piston sleeve (230); A spring is sleeved on the piston sleeve (230), and the spring serves as the buffer (300). One end of the spring abuts against the piston sleeve (230), and the other end abuts against the sliding shaft (220).

2. A high-precision flexible suction tip as claimed in claim 1, characterized in that: The piston sleeve (230) is slidably matched with the outer wall of the sliding shaft (220) and is sealedly connected.

3. A high-precision flexible suction tip as claimed in claim 2, characterized in that: A ball (240) is arranged between the piston sleeve (230) and the sliding shaft (220), and a ball rack (250) is provided corresponding to the ball (240) for support.

4. A high-precision flexible suction tip as claimed in claim 3, characterized in that: A sealing sleeve (260) is also provided between the piston sleeve (230) and the sliding shaft (220), and the sealing sleeve (260) is located on a side of the air outlet pipe (121) relative to the ball (240).

5. A high-precision flexible suction tip as claimed in claim 4, characterized in that: A gap is maintained between the piston sleeve (230) and the sliding shaft (220) to accommodate the balls (240), the ball rack (250) and the sealing sleeve (260), and a ball groove corresponding to the balls (240) is provided on the inner wall of the piston sleeve (230).

6. A high-precision flexible suction tip according to any one of claims 1 to 5, characterized in that: The sliding cavity (110) and the air outlet pipeline (121) are both in the form of straight tubes, and the sliding cavity (110) and the air outlet pipeline (121) are coaxially arranged.

7. A high-precision flexible suction tip as claimed in claim 6, characterized in that: The air nozzle (120) is located at the end of the outer sleeve (100), and the outer diameter of the air nozzle (120) is smaller than the outer diameter of the outer sleeve (100) body. An annular groove is formed on the outer periphery of the air nozzle (120).

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