Clamping mechanism and feeding assembly

Abstract

The utility model relates to the field of tin spraying machines, and discloses a clamping mechanism which comprises a support, a fixed plate, a movable plate and a pushing piece, the fixed plate is fixedly connected with the front end of the support, the movable plate is hinged to the fixed plate, and a clamping opening capable of being opened and closed along with rotation of the movable plate relative to the fixed plate is formed at the lower end of the movable plate and the lower end of the fixed plate. The pushing piece is a pushing-force-adjustable pushing piece, the rear end of the pushing piece is hinged to the support, the output end of the pushing piece is hinged to the upper end of the movable plate, and the pushing piece is used for pushing the movable plate to rotate back and forth relative to the fixed plate. According to the utility model, the movable plate is hinged with the fixed plate, so that the lower end of the movable plate forms the clamping opening capable of being opened and closed, and the pushing piece is arranged on the bracket to push the movable plate to rotate back and forth relative to the fixed plate, so that the PCB can be clamped and loosened, and the overall structure is simple; meanwhile, the pushing part is the pushing part with the adjustable pushing force, the good clamping force can be obtained by adjusting the pushing force according to the PCBs of different sizes and weights, and the good clamping effect is obtained.

Description

Technical Field

[0001] This utility model relates to the field of tin spraying machines, and more specifically, to a clamping mechanism for tin spraying machines. This utility model also relates to a feeding assembly. Background Technology

[0002] A tin-plating machine is a device used to automatically apply tin plating to the surface of PCB boards. During operation, a clamping mechanism is required to hold the PCB board fed by the feeding mechanism in a vertical position. Chinese patent document CN217536129U, entitled "A Lifting Tin-Plated Assembly and a Tin-Plated Machine with the Same Assembly," discloses a tin-plating machine that includes a clamping mechanism. Specifically, the clamping mechanism includes a shaft movably connected to a long plate. The top of the shaft has a roller bearing, and both ends abut against torsion springs on a horizontal plate and a long plate, respectively. Movable clamps, fixed clamps, and a roller-pushing mechanism are fixedly connected to the bottom of the shaft and the long plate. The roller-pushing mechanism pushes the roller bearing to open and rotate to both sides, thereby causing the movable clamp to open. After the roller-pushing mechanism returns to its original position, the torsion spring resets, causing the shaft to rotate and the movable clamp to move towards the fixed clamp, thus clamping the PCB board.

[0003] The aforementioned clamping mechanism relies on the elastic force of a torsion spring to hold and fix the movable clamp against the PCB board. However, the elastic force of the torsion spring is fixed, making it difficult for this clamping mechanism to be well-suited for clamping PCB boards of different sizes and weights. For heavier PCB boards, the clamping force may be insufficient, causing them to fall off after clamping. For thinner PCB boards, the clamping force may be too large, damaging the PCB board. In addition, this clamping mechanism has many components and a relatively complex structure. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a clamping mechanism with a relatively simple structure that is better suited for clamping PCBs of different sizes and weights.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A clamping mechanism includes a bracket, a fixed plate, a movable plate, and a pusher. The fixed plate is fixedly connected to the front end of the bracket. The movable plate is hinged to the fixed plate, and the lower ends of the movable plate and the fixed plate form a clamping opening that can be opened and closed as the movable plate rotates relative to the fixed plate. The pusher is a thrust-adjustable pusher, and its rear end is hinged to the bracket. The output end of the pusher is hinged to the upper end of the movable plate for pushing the movable plate to reciprocate relative to the fixed plate.

[0007] Furthermore, the movable plate includes at least two parallel clamping arms and a connecting strip fixedly connected to the upper end of each clamping arm. Each clamping arm is hinged to the fixed plate and the axis at the hinge is coaxial. The output end of the pusher is hinged to the connecting strip.

[0008] Furthermore, the fixing plate has through slots that correspond one-to-one with each clamping arm and allow the clamping arms to pass through.

[0009] Furthermore, the fixing plate has teeth at the clamping position.

[0010] A feeding assembly includes a stand mechanism and a first drive member for driving the stand mechanism to rotate, and further includes a clamping mechanism as described in any of the preceding claims, wherein the rear end of a bracket of the clamping mechanism is fixedly connected to the stand mechanism.

[0011] Furthermore, the clamping mechanism has at least two sets and is evenly arranged around the upright mechanism.

[0012] Furthermore, the support mechanism includes a column and at least two lifting mechanisms mounted on the column. Each lifting mechanism corresponds to a clamping mechanism and is used to drive the corresponding clamping mechanism to move up and down.

[0013] Furthermore, the lifting mechanism includes a slide rail fixedly connected to the column in the vertical direction, a slider slidably connected to the slide rail, and a driving mechanism for driving the slider to slide along the slide rail. The rear end of the bracket of the clamping mechanism is fixedly connected to the slider.

[0014] Furthermore, the driving mechanism includes a second driving member located at the lower end of the column, a synchronous wheel seat located at the upper end of the column, and a belt wound around the output end of the second driving member and the synchronous wheel seat, the belt being fixedly connected to the slider.

[0015] Furthermore, the support mechanism also includes a rotary table, the output end of the first driving member is fixedly connected to the rotary table for driving the rotary table to rotate, and the column is fixedly connected to the rotation center of the rotary table.

[0016] In summary, the present invention has the following advantages: The movable plate is hinged to the fixed plate, forming an openable clamping opening at its lower end. A pusher is installed on the bracket to push the movable plate to rotate reciprocally relative to the fixed plate, thus enabling the clamping and releasing of the PCB board. It uses fewer components and has a simple overall structure. Furthermore, the pusher is adjustable in force; for PCB boards of different sizes and weights, the optimal clamping force can be adjusted to achieve better clamping effect, resulting in greater practicality. Attached Figure Description

[0017] Figure 1This is a three-dimensional structure and a partially enlarged schematic diagram of the clamping mechanism of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the feeding component of this utility model when clamping a PCB board;

[0019] Figure 3 This is a three-dimensional structural diagram of the feeding assembly of this utility model with part of the outer shell removed.

[0020] Reference numerals: 1. Frame mechanism; 11. Column; 121. Slide rail; 122. Slider; 1231. Second drive component; 1232. Synchronous pulley seat; 1233. Belt; 2. First drive component; 10. Bracket; 20. Fixing plate; 202. Tooth; 203. Chamfer; 30. Movable plate; 301. Clamping arm; 302. Connecting bar; 40. Pushing component; 100. PCB board. Detailed Implementation

[0021] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] like Figure 1The clamping mechanism includes a bracket 10, a fixed plate 20, a movable plate 30, and a pusher 40. The fixed plate 20 is fixedly connected to the front end of the bracket 10. The movable plate 30 is hinged to the fixed plate 20, and the lower ends of the movable plate 30 and the fixed plate 20 form a clamping opening. This clamping opening can open and close as the movable plate 30 rotates relative to the fixed plate 20. The rear end of the pusher 40 is hinged to the bracket 10, and its output end is hinged to the upper end of the movable plate 30. When the output end of the pusher 40 extends or retracts, it pushes the movable plate 30 to rotate reciprocally relative to the fixed plate 20, thereby causing the clamping opening at the lower end to open and close. This is a thrust-adjustable pusher 40, preferably a cylinder, whose thrust can be adjusted by adjusting the air pressure; alternatively, the thrust can be adjusted indirectly by controlling the air flow rate entering the cylinder through a flow control valve.

[0026] In one embodiment, the movable plate 30 includes two parallel clamping arms 301 and connecting bars 302 fixedly connected to the upper end of each clamping arm 301. Each clamping arm 301 is hinged to the fixed plate 20, and the axes at the hinge points coincide, i.e., they are coaxial. Each clamping arm 301 is hinged to the fixed plate 20, and the output end of the pusher 40 is hinged to the connecting bar 302, using the connecting bar 302 to simultaneously push all clamping arms 301 to move synchronously. Of course, the number of clamping arms 301 can be three or four, depending on the actual clamping needs.

[0027] The fixing plate 20 has the same number of through slots 201 as the clamping arms 301. These through slots 201 correspond one-to-one with each clamping arm 301 and allow the clamping arms 301 to pass through, so that the lower end of each clamping arm 301 and the lower end of the adjacent fixing plate 20 can form a clamping opening. In addition, the fixing plate 20 is provided with teeth 202 at the clamping opening position to improve the clamping effect on the PCB board 100. At the same time, the lower edge of the fixing plate 20 is also provided with a chamfer 203 so that the PCB board 100 can smoothly enter the clamping opening.

[0028] like Figure 2 and 3 The feeding assembly shown includes a support frame mechanism 1 and a first drive component 2. The support frame mechanism 1 is equipped with four sets of clamping mechanisms, with the rear end of the support bracket 10 of each clamping mechanism fixedly connected to the support frame mechanism 1. These clamping mechanisms are evenly arranged around the support frame mechanism 1, such that adjacent sets of clamping mechanisms are 90° apart. The first drive component 2 drives the support frame mechanism 1 to rotate; each 90° rotation transfers the PCB board 100 from one workstation to the next. Of course, the number of clamping mechanisms can also be two, three, or more than four sets, depending on the actual workstation layout.

[0029] In one embodiment, the support mechanism 1 includes columns 11 and lifting mechanisms of the same number as the clamping mechanisms, with each lifting mechanism corresponding to a clamping mechanism and used to drive the corresponding clamping mechanism to move up and down. Both the support mechanism 1 and the first driving member 2 can be enclosed by a housing for protection. In the previous process, when the PCB board 100 is vertically conveyed to the feeding assembly, the lifting mechanism controls the clamping mechanism to descend, causing the PCB board 100 to move relative to the clamping opening. Then, the cylinder operates, pushing the movable plate 30 to rotate, causing the clamping opening to rotate in the closing direction until the PCB board 100 is clamped. The first driving member 2 drives the support mechanism 1 to rotate, transferring the PCB board 100 to the next processing station.

[0030] The frame mechanism 1 also includes a rotating platform. The output end of the first drive component 2 is fixedly connected to the rotating platform. The first drive component 2 adopts an RV motor, which can drive the rotating platform to rotate more smoothly. The column 11 is fixedly connected to the rotation center of the rotating platform. The center line of the column 11 itself coincides with the axis of the rotation center of the rotating platform, so that when rotating, the previous clamping mechanism can rotate to the position of the adjacent clamping mechanism.

[0031] In one embodiment, the lifting mechanism includes a slide rail 121, a slider 122, and a driving mechanism. The slide rail 121 is arranged vertically and fixedly connected to the column 11. The slider 122 is slidably connected to the slide rail 121. The driving mechanism is used to drive the slider 122 to slide up and down along the slide rail 121. The rear end of the bracket 10 of the clamping mechanism is fixedly connected to the slider 122, so that the clamping mechanism can move up and down with the slider 122.

[0032] In the above embodiment, the driving mechanism includes a second driving member 1231 located at the lower end of the column 11, a synchronous pulley seat 1232 located at the upper end of the column 11, and a belt 1233 wound around the output end of the second driving member 1231 and the synchronous pulley seat 1232. The belt 1233 is fixedly connected to the slider 122. The second driving member 1231 is driven by a motor. When the shaft rotates, it drives the belt 1233 to transmit power, causing the slider 122 to move up and down along the slide rail 121 following the belt 1233. The use of belt 1233 transmission is a mature technology with a relatively simple structure.

[0033] The above embodiments are merely explanations of the present utility model and are not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to the embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

Claims

1. A clamping mechanism, comprising a bracket, a fixed plate, a movable plate, and a pushing member, wherein the fixed plate is fixedly connected to the front end of the bracket, characterized in that: The movable plate is hinged to the fixed plate, and the lower ends of the movable plate and the fixed plate form a clamp that can open and close as the movable plate rotates relative to the fixed plate. The pusher is a pusher with adjustable thrust and its rear end is hinged to the bracket. The output end of the pusher is hinged to the upper end of the movable plate and is used to push the movable plate to reciprocate relative to the fixed plate.

2. The clamping mechanism according to claim 1, characterized in that: The movable plate includes at least two parallel clamping arms and a connecting strip fixedly connected to the upper end of each clamping arm. Each clamping arm is hinged to the fixed plate and the axis at the hinge is coaxial. The output end of the pusher is hinged to the connecting strip.

3. The clamping mechanism according to claim 2, characterized in that: The fixing plate has through slots that correspond one-to-one with each clamping arm and allow the clamping arms to pass through.

4. A clamping mechanism according to claim 1, 2, or 3, characterized in that: The fixing plate has teeth at the clamping position.

5. A feeding assembly, comprising a support mechanism and a first driving member for driving the support mechanism to rotate, characterized in that: It also includes the clamping mechanism as described in any one of claims 1 to 4, wherein the rear end of the bracket of the clamping mechanism is fixedly connected to the upright mechanism.

6. A feeding assembly according to claim 5, characterized in that: The clamping mechanism has at least two sets and is evenly arranged around the upright mechanism.

7. A feeding assembly according to claim 6, characterized in that: The frame mechanism includes a column and at least two lifting mechanisms mounted on the column. Each lifting mechanism corresponds to a clamping mechanism and is used to drive the corresponding clamping mechanism to move up and down.

8. A feeding assembly according to claim 7, characterized in that: The lifting mechanism includes a slide rail fixedly connected to the column in the vertical direction, a slider slidably connected to the slide rail, and a driving mechanism for driving the slider to slide along the slide rail. The rear end of the bracket of the clamping mechanism is fixedly connected to the slider.

9. A feeding assembly according to claim 8, characterized in that: The drive mechanism includes a second drive member located at the lower end of the column, a synchronous pulley seat located at the upper end of the column, and a belt wound around the output end of the second drive member and the synchronous pulley seat, the belt being fixedly connected to the slider.

10. A feeding assembly according to claim 7, 8, or 9, characterized in that: The support mechanism also includes a rotating platform. The output end of the first driving component is fixedly connected to the rotating platform to drive the rotating platform to rotate. The column is fixedly connected to the rotation center of the rotating platform.

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