Film drawing structure of chip mounter

Abstract

The utility model relates to a film drawing structure of a chip mounter, which is applied to material belt film drawing of a small chip mounter. The device comprises a motor and a guide rod, an output shaft of the motor is parallel to the guide rod, the guide rod is used for winding a material film of a material disc, and the device further comprises a rotating shaft connected with the output shaft of the motor. The driving gear and the driven gear are meshed with each other, the silica gel ring is arranged between the driving gear and the rotating shaft, and the silica gel ring is used for providing frictional resistance for film drawing; protective plates sleeve the rotating shaft and are arranged on the two sides of the driving gear; the structural column is arranged in the driven gear and fixedly connected with the protection plate. The utility model has the advantages of reasonable structural design, simple and reliable structure, light weight, low cost and low processing requirement, and parts can be manufactured by 3D printing.

Description

Technical Field

[0001] The utility model relates to a film pulling structure for a chip placement machine, which is mainly used for pulling film of material strips of small chip placement machines. Background Art

[0002] Existing SMT placement machine automatic production lines, especially small automatic placement machines, often have complex film pulling structures, making them difficult to operate during use. The overall material rack is heavy, and the production and transportation costs are high. Moreover, maintenance and replacement are also troublesome and costly.

[0003] For example, Chinese utility model patent CN 205266041 U discloses a film pulling mechanism for a patch machine, including a bracket, a transmission shaft, and a driving mechanism. A flange gear that drives the film to move is installed on the transmission shaft, and the film passes around the flange gear. It also includes a clamping mechanism that presses the film tightly against the flange gear. The clamping mechanism includes a fixed rod, a fixed seat is installed on the fixed rod, the fixed rod is connected to the bracket, a button movable wheel seat is movably connected to the fixed seat, a pressure wheel is movably connected to one end of the button movable wheel seat, and a spring is provided between the button movable wheel seat and the fixed seat. The pressure wheel presses the film tightly against the flange gear through the action of the spring. The utility model claims that the spring preload can be adjusted according to the different material strips, fully ensuring the smooth operation of each film pulling, strong independence, greatly reducing the production cost of the stripping drive source, and improving production efficiency.

[0004] However, this type of SMT machine's film-pulling mechanism still suffers from the complex mechanical issues of existing technologies. The overall material rack is relatively heavy, costly, and inconvenient to replace and repair. Furthermore, the timing belt control transmission is not precise enough, making synchronization issues prone. Due to manufacturing tolerances, the spring's peeling resistance is prone to fluctuations and is difficult to adjust. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a SMT film pulling structure with reasonable structural design, simple and reliable structure, light weight and low cost, low processing requirements, and components that can be 3D printed and manufactured.

[0006] The technical solution adopted by the present invention to solve the above technical problems is a film pulling structure of the placement machine, which includes a motor and a guide rod. The output shaft of the motor is parallel to the guide rod. The guide rod is used to wind the film of the material tray. The structural characteristics are: it also includes the following components:

[0007] (1) a rotating shaft connected to the output shaft of the motor;

[0008] (2) A driving gear and a driven gear meshing with each other, wherein the driving gear is sleeved on the rotating shaft; the two gears mesh with each other and pull the nylon belt when rotating.

[0009] (3) A silicone ring, which is arranged between the driving gear and the rotating shaft, and is used to provide friction resistance for pulling the film; the principle here is that the damping ring is squeezed and pressed around the rotating shaft, and friction force is generated when it rotates.

[0010] (4) a guard plate, the guard plate being sleeved on the rotating shaft and arranged on both sides of the driving gear;

[0011] The guard plate prevents the nylon belt from deviating from the position of the intermeshing gears.

[0012] (5) A structural column. The structural column is disposed inside the driven gear and is fixedly connected to the guard plate. The structural column has two main functions: 1. It provides structural support for the two guard plates, ensuring that the distance between the two guard plates is consistent and that the strength is sufficient; 2. It serves as a rotating shaft for the driven gear.

[0013] Preferably, a gasket is provided on one or both sides of the guard plate of the present invention and is sleeved on the rotating shaft. The function of the gasket is to provide a fixed spacing between two adjacent membrane structures, ensuring that the spacing between all membrane structures is equal.

[0014] Preferably, the guard plate and the gasket described in the present invention are integrated.

[0015] Preferably, the gasket described in the present invention is a plastic gasket.

[0016] Preferably, the motor of the present invention is provided with a stabilizing shaft parallel to the rotating shaft, and the guard plate is sleeved on the stabilizing shaft.

[0017] Preferably, the output shaft of the motor described in the present invention is connected to the rotating shaft through a coupling.

[0018] Preferably, the film pulling structure of the chip placement machine described in the present invention corresponds to the elastic feeder of the chip placement machine.

[0019] Preferably, the structural column of the present invention is a copper column or an aluminum column.

[0020] Preferably, the damping ring of the present invention is a silicone ring, a rubber ring or a fluororubber ring.

[0021] Compared with the prior art, the present invention has the following advantages and effects:

[0022] 1. Since a silicone ring is used to provide film pulling resistance, the structure is simple, the film pulling resistance is more stable and reliable, easy to adjust, and easy to replace.

[0023] 2. Easy to install and maintain, simple to operate.

[0024] 3. Due to its simple structure, the requirements for component processing accuracy and material are relatively low. Therefore, some structural parts are made using 3D printing technology. The overall material rack is easy to assemble, compact and light, reducing production and transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a structural diagram of the present utility model.

[0027] Figure 2 It is a partial structural diagram of the utility model.

[0028] Figure 3 for Figure 2 Schematic diagram of the decomposition.

[0029] Explanation of reference numerals: elastic feeder 1, rotating shaft 2, motor 3, driving gear 4, coupling 5, driven gear 6, guard plate 7, guide rod 8, material tray 9, plastic gasket 10, silicone ring 11, copper column 12, stabilizing shaft 13. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the embodiments. The following embodiments are intended to explain the present invention, but the present invention is not limited to the following embodiments.

[0031] Example 1: Figures 1 to 3As shown, this embodiment describes a film pulling structure of a chip placement machine, which is composed of a plurality of unit modules, and each unit module corresponds to an elastic feeder 1. The structural support structure of each unit module is a guard plate 7, and the guard plate 7 is divided into two pieces on the left and right. Two upper and lower holes are provided on each guard plate 7. Every two guard plates 7 clamp the driving gear 4, and the width of the driving gear 4 is slightly wider than the film. A silicone sleeve 11 is provided in the driving gear 4. A plastic gasket 10 is provided on the outside of the guard plate 7. The plastic gasket 10 is used to adjust the width to adapt to the elastic feeder 1, to ensure that the distance between each film pulling structure is the same, so that the film pulling structures are independent of each other and do not affect each other. The driving gear 4, the silicone sleeve 11, the guard plate 7 and the plastic gasket 10 are jointly sleeved on the rotating shaft 2, and the guard plate 7 is sleeved on the stabilizing shaft 13 through another hole, thereby further achieving fixation. The rotating shaft 2 is connected to the output shaft of the motor 3 through the coupling 5. At the same time, guard plates 7, mounted on the left and right sides of the driving gear 4 and driven gear 6, ensure effective meshing between the two gears and provide a dedicated path for the nylon film to advance, effectively preventing it from becoming entangled. Copper pillars 12, installed within the driven gear 6, serve as a supporting shaft and allow guard plates 7 to be secured to the copper pillars 12 via bolts. Furthermore, copper pillars 12 effectively reduce friction during the rotation of the driven gear 6, allowing us to achieve high torque with a small motor, achieving high torque with low power consumption.

[0032] A silicone ring 11 with a resistance of 200N is installed inside the driving gear 4 so that it can continuously provide a pulling force of 200N and effectively perform the film pulling movement.

[0033] During operation: the material belt in the material tray 9 is loaded into the elastic feeder 1, and the nylon material film bypasses the guide rod 8 and passes through the meshing point of the driving gear 4 and the driven gear 6. When feeding, the motor 3 provides power, and drives the rotating shaft 2 to rotate through the coupling 5. The rotating shaft 2 passes through the inside of the driving gear 4, and the driving gear 4 and the driven gear 6 are meshed. The friction force provided by the rotation of the two gears drives the nylon belt to pull the film.

[0034] Furthermore, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may vary. Any equivalent or simple variations based on the structure, features, and principles described in this utility model are included within the scope of protection of this utility model. Those skilled in the art of the present invention may make various modifications, additions, or substitutions to the described specific embodiments, and these modifications, as long as they do not deviate from the structure of this utility model or exceed the scope defined by these claims, shall fall within the scope of protection of this utility model.

Claims

1. A film pulling structure for a placement machine, comprising a motor and a guide rod, wherein the output shaft of the motor and the guide rod are parallel to each other, and the guide rod is used to wind the film of the material tray, characterized in that: Also includes the following components: (1) a rotating shaft connected to the output shaft of the motor; (2) a driving gear and a driven gear meshing with each other, wherein the driving gear is sleeved on the rotating shaft; (3) a damping ring, which is arranged between the driving gear and the rotating shaft and is used to provide friction resistance for pulling the film; (4) a guard plate, the guard plate being sleeved on the rotating shaft and arranged on both sides of the driving gear; (5) A structural column, wherein the structural column is arranged inside the driven gear and is fixedly connected to the guard plate.

2. The film pulling structure of the placement machine according to claim 1, characterized in that: One side or both sides of the guard plate are provided with a gasket sleeved on the rotating shaft.

3. The film pulling structure of the placement machine according to claim 2, characterized in that: The guard plate and the gasket are integrated.

4. The film pulling structure of the placement machine according to claim 2, characterized in that: The gasket is a plastic gasket.

5. The film pulling structure of the placement machine according to claim 1, characterized in that: The motor is provided with a stabilizing shaft which is parallel to the rotating shaft, and the guard plate is sleeved on the stabilizing shaft.

6. The film pulling structure of the placement machine according to claim 1, characterized in that: The output shaft of the motor is connected to the rotating shaft through a coupling.

7. The film pulling structure of a chip mounter according to claim 1, 2, 3, 4 or 5, characterized in that: The film pulling structure of the chip placement machine corresponds to the elastic feeder of the chip placement machine.

8. The film pulling structure of the placement machine according to claim 7, characterized in that: The structural columns are copper columns or aluminum columns.

9. The film pulling structure of the chip mounter according to claim 7, characterized in that: The damping ring is a silicone ring, a rubber ring or a fluororubber ring.

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