A mouthpiece assembly

Abstract

The utility model relates to the field of suction nozzle of mounting equipment, it discloses a kind of suction nozzle assemblies, including the connecting seat of being set in the end of patch machine mounting head, the bottom of connecting seat is slidably provided with outer suction nozzle tube along vertical direction and is provided with spring between both, coaxial screw thread is provided with inner suction nozzle tube in outer suction nozzle tube, and the upper tube mouth of outer suction nozzle tube and lower tube mouth place all extend outward with external step, scale ring is set between two external steps, scale value is set on scale ring, scale ring and the outer coaxial of two external steps are provided with outer ring made of transparent material, the lower tube mouth of inner suction nozzle tube extends outer suction nozzle tube and coaxially extends with convex ring outward, the outer circumferential surface of convex ring is coaxially provided with sealing ring upwards, outer ring is coaxially provided with sealing plug outside, and the upper opening of sealing ring and sealing plug constitute movable joint. The suction nozzle assembly size of the scheme can be adjusted, to solve the problem of inconvenient use when production line upgrading and refitting exists that suction nozzle size is not adjustable.

Description

Technical Field

[0001] This utility model relates to the field of automated circuit board mounting equipment, specifically to the field of nozzles for mounting equipment, and particularly to a nozzle assembly. Background Technology

[0002] The surface mount nozzle (SMT nozzle) is a precision tool installed at the end of the placement head of a pick-and-place machine. It uses vacuum negative pressure to pick up, transfer, and release electronic components. Like a miniature "robotic arm," it accurately picks up components from the feeder and places them precisely on the designated location on the circuit board. The nozzle is one of the most crucial and precise components of a pick-and-place machine, and its performance directly affects placement quality and production efficiency.

[0003] The nozzles of existing pick-and-place machines are generally integrated structures with non-adjustable lengths. However, when the production line needs to be upgraded or modified, the length of the nozzle may cause failure to pick up components due to the size of the components. For example, if the nozzle is too long, it may exceed the limit and easily damage the components due to insufficient space for downward movement. If the nozzle is too short, it may not be able to fit the components due to excessive downward movement, resulting in negative pressure pickup failure.

[0004] Based on the above problems, this utility model proposes a suction nozzle assembly. Utility Model Content

[0005] To address the problems mentioned in the background above, this utility model provides a suction nozzle assembly.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows.

[0007] A nozzle assembly includes a connector at the end of a pick-and-place machine head, an outer nozzle tube is slidably disposed on the bottom of the connector in a vertical direction and a spring is disposed between the two; An inner suction tube is coaxially installed inside the outer suction tube, and the height of the inner suction tube is adjustable.

[0008] As a further improvement and optimization of this utility model, the bottom of the connecting seat is provided with a vertically arranged sleeve, and a sleeve rod extends coaxially from the upper opening of the external suction nozzle tube. The sleeve rod is hollow inside, and a slip ring extends outward from the upper open end of the sleeve rod. The slip ring is slidably sleeved in the sleeve, and a limiting ring is provided at the lower opening of the sleeve to prevent the slip ring from dislodging.

[0009] As a further improvement and optimization of this utility model, the connecting seat is provided with a clearance hole, one end of which is connected to the sleeve and the other end is connected to a negative pressure pump.

[0010] As a further improvement and optimization of this utility model, the inner suction tube is coaxially threaded inside the outer suction tube.

[0011] As a further improvement and optimization of this utility model, both the upper and lower openings of the external suction nozzle tube have external steps extending outwards, and a scale ring is provided between the two external steps, with scale values ​​provided on the scale ring. The scale ring and the two outer steps are coaxially provided with an outer ring, which is made of transparent material.

[0012] As a further improvement and optimization of this utility model, the lower opening of the inner suction tube extends out of the outer suction tube and coaxially extends outward with a convex ring, and a sealing ring is provided on the outer circular surface of the convex ring facing upward. A sealing plug is coaxially fitted on the outside of the outer ring, and the upper opening of the sealing ring is movably connected to the sealing plug.

[0013] As a further improvement and optimization of this utility model, an oil seal is provided at the connection between the sealing ring and the sealing plug.

[0014] Compared with the prior art, the advantages of this utility model are as follows: In this solution, the size of the suction nozzle can be adjusted, thereby solving the problem mentioned in the background technology that the size of the suction nozzle is not adjustable and causes inconvenience during production line upgrades and modifications. Specifically: the sealing ring is rotated, and the sealing ring rotates together with the inner suction nozzle tube. Therefore, the inner suction nozzle tube rotates while moving axially, and the inner suction nozzle tube moves axially together with the sealing ring, thereby changing the size of the suction nozzle composed of the outer suction nozzle tube and the inner suction nozzle tube. Furthermore, when the suction nozzle is used to adsorb the element under negative pressure, the lower end of the inner suction tube of the suction nozzle is in contact with the element, and then the negative pressure pump is started, so that negative pressure can be applied to the element for adsorption. During this process, due to the presence of the sealing plug, the problem of "poor sealing performance of threaded connection method can easily affect the negative pressure adsorption function" can be solved. Furthermore, during the nozzle size adjustment process, since the outer ring is transparent and there is a scale ring between the outer ring and the outer nozzle tube, the movement distance of the sealing ring can be directly read through the scale value on the scale ring, thereby obtaining the movement distance of the inner nozzle tube, which means the size of the nozzle after adjustment can be clearly obtained. Furthermore, during the negative pressure adsorption process of the suction nozzle, the presence of the spring ensures that the lower opening of the inner suction nozzle tube fits tightly against the upper surface of the element, thereby improving the negative pressure adsorption effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the outer suction tube and the inner suction tube; Figure 4An exploded view of the outer suction nozzle tube, the scale ring, and the outer ring; Figure 5 This is a cross-sectional view of the inner suction nozzle tube, the sealing ring, and the sealing plug.

[0016] The labels in the attached diagram are: 1. Connecting seat; 2. Sleeve; 3. External suction nozzle tube; 4. Sleeve rod; 5. Spring; 6. External step; 7. Scale ring; 8. Outer ring; 9. Internal suction nozzle tube; 10. Protruding ring; 11. Sealing ring; 12. Sealing plug. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] Reference Figures 1-5 A nozzle assembly includes a connector 1 disposed at the end of the placement head of a pick-and-place machine. An external nozzle tube 3 is slidably disposed on the bottom of the connector 1 in a vertical direction, and a spring 5 is disposed between the two.

[0019] Furthermore, refer to Figure 2 and Figure 3 The bottom of the connecting seat 1 is provided with a vertically arranged sleeve 2. A sleeve rod 4 extends coaxially from the upper opening of the external suction nozzle tube 3. The sleeve rod 4 is hollow inside. A slip ring extends outward from the upper opening end of the sleeve rod 4. The slip ring is slidably sleeved inside the sleeve 2. A limiting ring is provided at the lower opening of the sleeve 2 to prevent the slip ring from dislodging. Through the cooperation of the slip ring, sleeve rod 4, sleeve 2 and limiting ring, the sliding guide cooperation between the connecting seat 1 and the external suction nozzle tube 3 is realized. The spring 5 is sleeved on the outside of the sleeve 2 and the sleeve rod 4.

[0020] Furthermore, the connecting seat 1 is provided with a clearance hole, which is not shown in the figure. One end of the clearance hole is connected to the sleeve 2, and the other end is connected to the negative pressure pump.

[0021] An inner suction tube 9 is coaxially arranged inside the outer suction tube 3, and the height of the inner suction tube 9 is adjustable. For example, the inner suction tube 9 is coaxially threaded inside the outer suction tube 3.

[0022] Furthermore, due to the poor sealing performance of threaded connections, in order to avoid affecting the negative pressure adsorption function and to clearly know the adjustment results when adjusting the dimensions of the suction structure composed of the outer suction tube 3 and the inner suction tube 9 each time the height of the inner suction tube 9 is adjusted, it is necessary to refer to... Figures 3-5 Both the upper and lower openings of the external suction tube 3 have external steps 6 extending outwards. A scale ring 7 is provided between the two external steps 6, and scale values ​​are provided on the scale ring 7. The scale values ​​are not shown in the figure.

[0023] The scale ring 7 and the two outer steps 6 are coaxially provided with an outer ring 8, and the outer ring 8 is made of a transparent material, such as glass or transparent plastic.

[0024] The lower opening of the inner suction tube 9 extends outward from the outer suction tube 3 and is coaxially extended outward with a convex ring 10. A sealing ring 11 is provided on the outer circular surface of the convex ring 10, which is coaxially upward.

[0025] The outer ring 8 is coaxially fitted with a sealing plug 12. The upper opening of the sealing ring 11 is movably connected to the sealing plug 12, for example, through a bearing. Furthermore, an oil seal is provided at the connection.

[0026] The working principle of this utility model: The process of adjusting the size of the suction nozzle is as follows: the sealing ring 11 is rotated, and the sealing ring 11 rotates together with the inner suction nozzle tube 9. Therefore, the inner suction nozzle tube 9 moves axially while rotating, and the inner suction nozzle tube 9 moves axially together with the sealing ring 11, thereby changing the size of the suction nozzle composed of the outer suction nozzle tube 3 and the inner suction nozzle tube 9. Furthermore, when the suction nozzle is used to adsorb the element under negative pressure, the lower end of the inner suction nozzle tube 9 of the suction nozzle is in contact with the element, and then the negative pressure pump is started, so that negative pressure adsorption can be applied to the element. During this process, due to the presence of the sealing plug 12, the problem of "poor sealing performance of the threaded connection method easily affecting the negative pressure adsorption function" can be solved. Furthermore, during the nozzle size adjustment process, since the outer ring 8 is transparent and there is a scale ring 7 between the outer ring 8 and the outer nozzle tube 3, the movement distance of the sealing ring 11 can be directly read through the scale value on the scale ring 7, thereby obtaining the movement distance of the inner nozzle tube 9, which means the size of the nozzle after adjustment can be clearly obtained. Furthermore, during the negative pressure adsorption process of the suction nozzle, the presence of spring 5 ensures that the lower opening of the inner suction nozzle tube 9 is tightly fitted with the upper surface of the element, thereby improving the negative pressure adsorption effect.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A nozzle assembly, comprising a connector (1) disposed at the end of a pick-and-place machine placement head, characterized in that, The bottom of the connecting seat (1) is slidably provided with an external suction nozzle tube (3) in the vertical direction, and a spring (5) is provided between the two. An inner suction tube (9) is coaxially arranged inside the outer suction tube (3), and the height of the inner suction tube (9) is adjustable.

2. The suction nozzle assembly according to claim 1, characterized in that, The bottom of the connecting seat (1) is provided with a vertically arranged sleeve (2), and a sleeve rod (4) extends coaxially from the upper opening of the external suction nozzle (3). The sleeve rod (4) is hollow inside, and a slip ring extends outward from the upper opening end of the sleeve rod (4). The slip ring is slidably sleeved in the sleeve (2), and a limiting ring is provided at the lower opening of the sleeve (2) to prevent the slip ring from dislodging.

3. A suction nozzle assembly according to claim 2, characterized in that, The connecting seat (1) is provided with a clearance hole. One end of the clearance hole is connected to the sleeve (2), and the other end is connected to a negative pressure pump.

4. A suction nozzle assembly according to claim 1, characterized in that, The inner suction tube (9) is coaxially threaded inside the outer suction tube (3).

5. A suction nozzle assembly according to claim 4, characterized in that, The upper and lower openings of the external suction tube (3) are both extended outward with external steps (6), and a scale ring (7) is provided between the two external steps (6), with scale values ​​provided on the scale ring (7); The outer ring (8) is coaxially arranged on the outside of the scale ring (7) and the two outer steps (6), and the outer ring (8) is made of transparent material.

6. A suction nozzle assembly according to claim 5, characterized in that, The lower opening of the inner suction tube (9) extends out of the outer suction tube (3) and is coaxially extended outward with a convex ring (10). A sealing ring (11) is provided on the outer circular surface of the convex ring (10) facing upward. A sealing plug (12) is coaxially fitted on the outside of the outer ring (8), and the upper opening of the sealing ring (11) is movably connected with the sealing plug (12).

7. A suction nozzle assembly according to claim 6, characterized in that, An oil seal is provided at the connection between the sealing ring (11) and the sealing plug (12).

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