Commutator tin dispensing and tabletting equipment and method thereof

Abstract

The invention relates to the field of commutator preparation, and particularly discloses commutator tin dispensing and sheet pressing equipment which comprises a workbench, copper claw feeding equipment, carbon sheet feeding equipment, pressing equipment and tin dispensing equipment, and a copper claw placing base is arranged on the workbench. Through the working steps of copper claw feeding, tin dispensing, carbon plate feeding and pressing, the arrangement of the copper claw placement base and the arrangement of the copper claw placement groove in the placement base, the commutator tin dispensing and pressing equipment is developed, and the blank of the carbon plate and copper claw meshing technology in the domestic market is filled.

Description

Technical Field

[0001] This invention relates to the field of commutator manufacturing, and more specifically to a commutator soldering and pressing equipment and method. Background Technology

[0002] To prevent short circuits, the commutator interlocks two mutually insulated semi-circular metal rings. Tin, in a soft form, is bonded between the carbon sheet and the copper claw. After processes such as firing, glue injection, aging, and cleaning, it is made into a semi-finished product. Based on data testing, it is further processed through steps such as turning and copper claw modification to finally form the commutator product.

[0003] The commutator plays a crucial role in a DC motor. It is connected to the circuit via brushes. When the energized coil just passes the equilibrium position due to inertia, the commutator automatically changes the direction of the current in the coil, thereby maintaining the continuous rotation of the coil. If the commutator is a complete loop, the current will directly pass through the commutator to form a circuit, which will cause a short circuit in the power supply and thus damage the equipment.

[0004] In addition, the design principle of the commutator is also closely related to the working process of the DC motor. When the coil plane just rotates past the equilibrium position, the commutator changes the current direction to ensure that the motor can rotate continuously. This design not only simplifies the structure of the motor, but also improves its working efficiency.

[0005] The most important aspect is the meshing technology between the carbon sheet and the copper claw, which is currently a difficult problem to overcome. Summary of the Invention

[0006] The present invention aims to solve the technical problems mentioned in the background section above, and achieves this through the following technical solution:

[0007] A commutator soldering and pressing device includes a worktable, a copper claw feeding device, a carbon sheet feeding device, a pressing device, and a soldering device. The worktable is a round table structure with a rotating structure in the middle that can drive the worktable to rotate. Several copper claw placement bases are arranged on the worktable in a circular array. A copper claw placement groove is provided in the middle of each copper claw placement base. The copper claw feeding device, carbon sheet feeding device, pressing device, and soldering device are located around the worktable.

[0008] Both copper claw feeding equipment and carbon sheet feeding equipment use lateral and longitudinal moving devices to control the gripping structure to achieve lateral and longitudinal movement. The gripping structure is also equipped with a steering mechanism, which allows the gripped copper claw and carbon sheet to rotate at a certain angle, so that they can be adapted to the copper claw placement slot and placed into the copper claw placement slot. In order to improve the operating accuracy, the moving device in the feeding equipment generally uses a linear module or a lead screw.

[0009] The pressing device comprises a pressing support, a hydraulic cylinder and a pressing block, the hydraulic cylinder is fixed on the pressing support, the hydraulic cylinder is connected with the pressing block and controls the up-down movement of the pressing block, and the pressing block is located directly above the copper claw placing base.

[0010] The tin-pointing device comprises a tin-pointing support, a dispensing head and an air pump, the dispensing head and the air pump are located on the tin-pointing support, the dispensing head is located directly above the copper claw placing base, the dispensing head is internally provided with a tin paste pipeline, the air pump is in communication with the tin paste pipeline, and a plurality of heating rods are further arranged in the dispensing head.

[0011] Preferably, the plurality of heating rods are annularly distributed around the tin paste pipeline.

[0012] Preferably, the dispensing head is externally provided at the bottom with an air pressure cutting structure, the air pressure cutting structure comprises a plurality of air pipes and a plurality of air nozzles, the dispensing head is externally provided at the bottom with a plurality of air blowing holes, the air pipes are fixed on the outside of the dispensing head, one end of the air nozzles is located in the air blowing holes, and the other end of the air nozzles is connected with the air pipes, and the air pipes are provided with air pressure by the air pump.

[0013] Preferably, the dispensing head is externally provided at the bottom with a clamping structure, the clamping structure comprises a blocking block, a movable block and a spring, the blocking block is arranged on the inner wall of the dispensing head, the blocking block is internally provided with a through hole, the movable block is in the shape of a trapezoid with a small upper end and a large lower end, the upper end of the movable block is located in the through hole, the lower end of the movable block is located below the blocking block, the inner wall of the dispensing head is provided with a movable groove, the spring is fixed at the bottom of the movable groove, the movable block is externally connected with a sliding block, and the sliding block is located in the movable groove and is fixedly connected with the spring at the bottom.

[0014] Preferably, the workbench is further provided on the upper side with a blanking device.

[0015] A commutator tin-pointing and tablet-pressing method uses the commutator tin-pointing and tablet-pressing device as claimed in the above claims, and the method is characterized in that:

[0016] S1. First, use the clamp to take out the copper claws one by one and place the copper claws on the operation table;

[0017] S2. Then evenly apply tin on the surface of the copper claws through the dispensing device;

[0018] S3. Then place the carbon sheets on the copper claws after clamping the carbon sheets through the clamp;

[0019] S4. Then press the copper claws and the carbon sheets through the pressing equipment;

[0020] S5. Finally, take down the pressed copper claws from the operation table and place them in a tray to wait for the tin to cool down.

[0021] The beneficial effects of this invention are:

[0022] 1. This invention, through the cooperation of a feeding device, a pressing device, and a soldering device, follows the working steps of copper claw feeding, soldering, carbon sheet feeding, and pressing. Furthermore, by setting a copper claw placement base and a copper claw placement groove on the placement base, a commutator soldering and pressing device has been developed, filling the gap in the market for carbon sheet and copper claw meshing technology.

[0023] 2. By setting an air pressure cut-off structure at the bottom of the dispensing head, after the soldering is completed, pressure can be applied to the air tube and the air nozzle can blow air into the channel inside the dispensing head to break the solder paste, thus avoiding the phenomenon of sticking after the soldering is completed.

[0024] 3. When the air pump is not pressurized, the movable block, under the action of the spring, is positioned at the top of the through hole in the middle of the blocking block, blocking the through hole and sealing the solder paste above the blocking block. When the air pump is pressurized, the movable block will overcome the elastic force of the spring and move downward, opening the through hole. The solder paste will flow from above the blocking block to below to complete the soldering operation. When the air pump stops working again, the pressure in the dispensing head gradually returns to atmospheric pressure, and the spring will gradually push the movable block upward into the through hole, so that the solder paste is once again isolated above the blocking block. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the pressing equipment of the present invention;

[0027] Figure 3 This is a schematic diagram of the soldering device of the present invention;

[0028] Figure 4 This is a cross-sectional view of the dispensing head structure of the present invention;

[0029] Figure 5 This is a cross-sectional view of the dispensing head in Example 2;

[0030] Figure 6 This is a cross-sectional view of the dispensing head in Example 3;

[0031] Figure 7 for Figure 6 Enlarged view of the area circled in the middle.

[0032] In the diagram: 1. Workbench; 2. Copper claw feeding equipment; 3. Carbon sheet feeding equipment; 4. Pressing equipment; 4-1. Pressing bracket; 4-2. Hydraulic cylinder; 4-3. Pressing block; 5. Soldering equipment; 5-1. Soldering bracket; 5-2. Dispensing head; 5-21. Air blowing hole; 5-22. Movable slot; 5-3. Air pump; 5-4. Solder paste pipeline; 5-5. Heating rod; 6. Copper claw placement base; 6-1. Copper claw placement slot; 7. Pneumatic cutting structure; 7-1. Air pipe; 7-2. Air nozzle; 8. Clamping structure; 8-1. Blocking block; 8-11. Through hole; 8-2. Movable block; 8-3. Spring; 9. Slider; 10. Unloading device. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] In the description of this invention, it should be understood that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The connection methods described by the terms "fixed connection" and "fixed arrangement" include, but are not limited to, "welding," "riveting," "adhesion," and "threaded connection." The terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0035] The terms “upper,” “lower,” “front,” “back,” “left,” “right,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention 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 limiting the present invention.

[0036] Example 1

[0037] Reference Figures 1-4A commutator soldering and pressing device includes a worktable 1, a copper claw feeding device 2, a carbon sheet feeding device 3, a pressing device 4, and a soldering device 5. The worktable 1 is a round table structure with a rotating structure in the middle that can drive the worktable 1 to rotate. Several copper claw placement bases 6 are arranged on the worktable 1 in a circular array. A copper claw placement groove 6-1 is set in the middle of the copper claw placement base 6. The shape of the copper claw placement groove 6-1 is consistent with the shape of the copper claw. The copper claw feeding device 2, the carbon sheet feeding device 3, the pressing device 4, and the soldering device 5 are located around the worktable 1.

[0038] Both the copper claw feeding device 2 and the carbon sheet feeding device 3 use horizontal and vertical moving devices to control the gripping structure to achieve horizontal and vertical movement. The gripping structure is also equipped with a steering mechanism, which allows the gripped copper claw and carbon sheet to rotate 360° so that they can be adapted to the copper claw placement slot 6-1 and placed into the copper claw placement slot 6-1. In order to improve the operating accuracy, the moving device in the feeding device generally uses a linear module or a lead screw.

[0039] The pressing device 4 includes a pressing bracket 4-1, a hydraulic cylinder 4-2, and a pressing block 4-3. The hydraulic cylinder 4-2 is fixed on the pressing bracket 4-1. The hydraulic cylinder 4-2 is connected to the pressing block 4-3 and controls the pressing block 4-3 to move up and down. The pressing block 4-3 is located directly above the copper claw placement base 6.

[0040] The soldering device 5 includes a soldering bracket 5-1, a dispensing head 5-2, and an air pump 5-3. Both the dispensing head 5-2 and the air pump 5-3 are located on the soldering bracket. The dispensing head 5-2 is located directly above the copper claw placement base 6. The dispensing head 5-2 is equipped with a solder paste pipeline 5-4. The air pump 5-3 is connected to the solder paste pipeline 5-4. Several heating rods 5-5 are also installed inside the dispensing head 5-2.

[0041] Preferably, several heating rods 5-5 are arranged in a ring around the solder paste conduit 5-4.

[0042] Preferably, a feeding device 10 is also provided on the upper side of the workbench 1.

[0043] In actual operation, S1, first use the copper claw feeding device 2 to clamp the copper claw and place the copper claw in the copper claw placement groove on the copper claw placement base 6;

[0044] S2. The worktable 1 rotates, and the copper claw is placed on the base 6 and rotated to be directly below the soldering device 5. Then, the soldering device 5 evenly coats the surface of the copper claw with solder.

[0045] S3. The workbench 1 continues to rotate, and the copper claw is placed on the base 6 and rotated to be directly below the carbon sheet feeding device 3. The carbon sheet is then picked up by the carbon sheet feeding device 3 and placed on the copper claw.

[0046] S4. The worktable 1 continues to rotate, and the copper claw is placed on the base 6 and rotated to be directly below the pressing device 4. Then, the copper claw and the carbon sheet are pressed together by the pressing device 4.

[0047] S5. The worktable 1 continues to rotate, and the copper claw is placed on the base 6 and rotated to be directly below the unloading device 10. Finally, the pressed copper claw is removed from the worktable and placed on a tray to wait for the tin to cool.

[0048] Example 2

[0049] Reference Figure 5 A pneumatic cutting structure 7 is provided on the outer periphery of the bottom of the dispensing head 5-2. The pneumatic cutting structure 7 includes several air tubes 7-1 and several air nozzles 7-2. Several air holes 5-21 are provided on the outer periphery of the bottom of the dispensing head 5-2. The air tubes 7-1 are fixed on the outside of the dispensing head 5-2. One end of the air nozzle 7-2 is located inside the air hole 5-21, and the other end is connected to the air tube 7-1. The air tubes 7-1 are supplied with air pressure by an air pump. By providing the pneumatic cutting structure 7 at the bottom of the dispensing head 5-2, after the soldering is completed, pressure can be applied to the air tubes 7-1, and the air nozzles 7-2 can blow air into the channel inside the dispensing head 5-2 to break the solder paste, thus avoiding the phenomenon of sticking after the soldering is completed.

[0050] Example 3

[0051] Reference Figures 6-7 A clamping structure 8 is provided on the outer periphery of the bottom of the dispensing head 5-2. The clamping structure 8 includes a blocking block 8-1, a movable block 8-2, and a spring 8-3. The blocking block 8-1 is provided on the inner wall of the dispensing head 5-2, and a through hole 8-11 is provided in the middle of the blocking block 8-1. The movable block 8-2 is a trapezoidal structure with a smaller upper end and a larger lower end. The upper end of the movable block 8-2 is located in the through hole, and the lower end of the movable block 8-2 is located below the blocking block 8-1. A movable groove 5-22 is provided on the inner wall of the dispensing head 5-2. The spring 8-3 is fixed to the bottom of the movable groove 5-22. A slider 9 is connected to the outer periphery of the movable block 8-2. The slider 9 is located in the movable groove 5-22, and the bottom of the slider 9 is fixedly connected to the spring 8-3. When the air pump 5-3 is working, it will pressurize the dispensing head 5-2, thereby dispensing the solder. Solder paste is squeezed from the dispensing head onto the copper claw below. When the air pump 5-3 is not pressurized, the movable block 8-2, under the action of the spring 8-3, is positioned at the top of the through hole 8-11 in the middle of the blocking block 8-1, blocking the through hole 8-11 and sealing the solder paste above the blocking block 8-1. When the air pump 8-3 pressurizes, the movable block 8-2 will overcome the elastic force of the spring 8-3 and move downward, opening the through hole 8-11. The solder paste will flow from above the blocking block 8-1 to below to complete the soldering operation. When the air pump 5-3 stops working again, the pressure in the dispensing head 5-2 gradually returns to atmospheric pressure, and the spring 8-3 will gradually push the movable block 8-2 into the through hole 8-11, so that the solder paste is once again isolated above the blocking block 8-1.

Claims

1. A commutator soldering and pressing device, comprising a worktable (1), a copper claw feeding device (2), a carbon sheet feeding device (3), a pressing device (4), and a soldering device (5), characterized in that, The workbench (1) is a round table structure. A rotating structure is set in the middle of the workbench (1) to drive the workbench (1) to rotate. Several copper claw placement bases (6) are set on the workbench (1). Several copper claw placement bases (6) are arranged in a ring array on the workbench (1). A copper claw placement groove (6-1) is set in the middle of the copper claw placement base (6). The copper claw feeding device (2), carbon sheet feeding device (3), pressing device (4) and soldering device (5) are located around the workbench (1) respectively. The pressing device (4) includes a pressing bracket (4-1), a hydraulic cylinder (4-2), and a pressing block (4-3). The hydraulic cylinder (4-2) is fixed on the pressing bracket (4-1). The hydraulic cylinder (4-2) is connected to the pressing block (4-3) and controls the pressing block (4-3) to move up and down. The pressing block (4-3) is located directly above the copper claw placement base (6). The soldering device (5) includes a soldering bracket (5-1), a dispensing head (5-2), and an air pump (5-3). The dispensing head (5-2) and the air pump (5-3) are both located on the soldering bracket. The dispensing head (5-2) is located directly above the copper claw placement base (6). The dispensing head (5-2) is equipped with a solder paste pipeline (5-4). The air pump (5-3) is connected to the solder paste pipeline (5-4). The dispensing head (5-2) is also equipped with several heating rods (5-5).

2. The commutator soldering and pressing equipment according to claim 1, characterized in that, Several heating rods (5-5) are arranged in a ring around the solder paste conduit (5-4).

3. The commutator soldering and pressing equipment according to claim 2, characterized in that, The upper side of the workbench (1) is also provided with a feeding device (10).

4. The commutator soldering and pressing equipment according to claim 3, characterized in that, The dispensing head (5-2) is provided with a pneumatic cutting structure (7) on the outer periphery of its bottom. The pneumatic cutting structure (7) includes several air tubes (7-1) and several air nozzles (7-2). The dispensing head (5-2) is provided with several air blowing holes (5-21) on the outer periphery of its bottom. The air tubes (7-1) are fixed to the outside of the dispensing head (5-2). One end of the air nozzle (7-2) is located inside the air blowing hole (5-21), and the other end is connected to the air tube (7-1). The air tubes (7-1) are supplied with air pressure by an air pump.

5. The commutator soldering and pressing equipment according to claim 3, characterized in that, The dispensing head (5-2) has a clamping structure (8) on its outer periphery at the bottom. The clamping structure (8) includes a blocking block (8-1), a movable block (8-2), and a spring (8-3). The blocking block (8-1) is provided on the inner wall of the dispensing head (5-2). The blocking block (8-1) has a through hole (8-11) in the middle. The movable block (8-2) is a trapezoidal structure with a smaller upper end and a larger lower end. The upper end of the movable block (8-2) is located in the through hole, and the lower end of the movable block (8-2) is located below the blocking block (8-1). The dispensing head (5-2) has a movable groove (5-22) on its inner wall. The spring (8-3) is fixed to the bottom of the movable groove (5-22). The movable block (8-2) is connected to a slider (9) on its outer periphery. The slider (9) is located in the movable groove (5-22), and the bottom of the slider (9) is fixedly connected to the spring (8-3).

6. A method for soldering a commutator, using the commutator soldering equipment described in the preceding claims, characterized in that, The method is as follows: S1. First, use the clamp to remove the copper claws one by one and place the copper claws on the operating table; S2. Then, the tin is evenly applied to the surface of the copper claw using a dispensing device. S3. Then, after clamping the carbon sheet with a fixture, place it on the copper claw. S4. Then, the copper claws and carbon sheets are pressed together using a pressing equipment; S5. Finally, wait for the pressed copper claws to be removed from the operating table and placed on a tray to wait for the tin to cool.

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