PCB welding structure for brushless motor

Abstract

The utility model relates to a PCB welding structure for a brushless motor, which comprises a conveying assembly, and the conveying assembly comprises supporting plates arranged at intervals, a jig plate movably arranged at the tops of the supporting plates, and a limiting mechanism fixed at the top of the jig plate; the jacking assembly comprises a connecting plate fixed to the bottom of the jig plate, a second through groove penetrating through the connecting plate, a transition plate arranged below the connecting plate in a liftable mode and a jacking mechanism arranged on the top of the transition plate in a liftable mode. When the PCB welding structure for the brushless motor carries out post welding on the PCB, the conveying assembly conveys a motor shell to a welding station, the jacking assembly jacks up the motor shell on the supporting column until the PCB abuts against the pressing strip, at the moment, an operator can carry out post welding processing on the PCB, products do not need to be taken down from the conveying station, and the operation is convenient. And meanwhile, the motor shell does not need to be fixed by using an additional jig, so that the welding efficiency is improved, and the cost investment is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of motor assembly technology, specifically relating to a PCB board welding structure for a brushless motor. Background Technology

[0002] A brushless motor consists of a motor body and a driver, and is a typical mechatronic product. The PCB board inside the brushless motor mainly houses key components such as electronic control circuits, sensors, and drive circuits. These components are integrated through the PCB board, enabling the motor to electronically control its rotational speed and torque, and to receive position information from sensors, thus achieving precise control. Therefore, the assembly of the internal PCB board in a brushless motor requires extremely high precision.

[0003] After the PCB board is assembled into the motor housing of the brushless motor, it needs to be "post-soldered." Post-soldering, as the name suggests, is a soldering operation performed after the PCB assembly is complete. This usually involves adding extra components or performing repair work on the already assembled circuit board. Because some components may not be able to be completed in the early soldering stage due to size, shape, or location limitations during PCBA board manufacturing, they need to be re-soldered later. Furthermore, post-soldering is also an effective means of repair when errors or defects are found during the early soldering process.

[0004] Post-soldering of PCB boards has the following advantages:

[0005] First, it improves production flexibility: through post-soldering, engineers can adjust the component layout on the circuit board according to actual needs to meet requirements such as product performance, functionality, or cost.

[0006] Secondly, post-soldering helps reduce production costs: In the early soldering stage, defective products may be produced for various reasons, while the post-soldering process can repair only the problem area without removing the entire circuit board, thereby reducing waste and lowering production costs.

[0007] Finally, post-soldering can also improve product quality: through meticulous post-soldering operations, the soldering quality of each component on the circuit board can be ensured, thereby improving the reliability and stability of the product.

[0008] On existing brushless motor assembly lines, the motor housing needs to be removed from the production line during PCB board soldering. A fixture is then used to secure the housing and prevent misalignment of the internal PCB board during subsequent soldering. After soldering, the motor housing is returned to the assembly line. This increases the number of steps and prolongs assembly and soldering time, and the need for fixtures further increases production costs. Utility Model Content

[0009] This invention provides a PCB board welding structure for brushless motors, which solves the defects of low welding efficiency and high cost in the prior art.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is: a PCB board welding structure for a brushless motor, the brushless motor including a motor housing, a lug integrally arranged on the outer circumferential surface of the motor housing, a limiting hole penetrating the lug, and a PCB board installed inside the motor housing, comprising:

[0011] A conveying assembly, comprising spaced support plates, a fixture plate movably disposed on top of the support plates, and a limiting mechanism fixed on top of the fixture plate, wherein the motor housing is placed on the limiting mechanism;

[0012] A lifting assembly, comprising a connecting plate fixed to the bottom of the fixture plate, a second through slot penetrating the connecting plate, a transition plate movably disposed below the connecting plate, and a lifting mechanism movably disposed on the top of the transition plate, wherein the lifting mechanism passes through the second through slot to lift the motor housing on the limiting mechanism;

[0013] The pressing assembly includes a frame mounted on the conveying assembly, an adjusting plate adjustablely disposed on the top of the frame, and a pressing strip integrally connected to the bottom of the adjusting plate for pressing the PCB board.

[0014] Optimally, the limiting mechanism includes a mounting block embedded in the fixture plate, a first through groove penetrating the mounting block, a support column circumferentially disposed on the top of the mounting block, and a limiting column integrally connected to the top of the support column;

[0015] The diameter of the limiting post is smaller than the diameter of the support post, the lug abuts against the top of the support post, and the limiting hole is inserted into the limiting post.

[0016] Optimally, the lifting mechanism includes a top plate that is vertically mounted on the top of the transition plate and cooperates with the second through slot, and a top rod that is height-adjustable mounted on the top plate. The top plate passes through the second through slot, and the top rod lifts the motor housing on the limiting mechanism.

[0017] Optimally, the top rod includes a screw screwed onto the top plate, a pad fixed to the top of the screw, and an upper adjusting nut and a lower adjusting nut screwed onto the screw, the upper adjusting nut abutting against the upper surface of the top plate, and the lower adjusting nut abutting against the lower surface of the top plate.

[0018] Optimally, the pressing assembly further includes a first limiting plate and a second limiting plate fixed at a distance from the top of the frame, a limiting groove formed between the first limiting plate and the second limiting plate, and an adjusting groove penetrating the adjusting plate, wherein the adjusting plate is engaged in the limiting groove.

[0019] Optimally, the lifting assembly further includes a first guide post fixed to the bottom of the connecting plate, a first fixing plate fixed to the bottom of the first guide post, a first guide sleeve embedded in the transition plate and sleeved on the first guide post, a first lifting cylinder fixed to the first fixing plate, a lifting plate connected to the first lifting cylinder, and a first fixing post fixed between the lifting plate and the transition plate.

[0020] Optimally, the lifting assembly further includes a second lifting cylinder fixed to the top of the lifting plate and connected to the top plate, a second guide sleeve embedded in the transition plate, and a second guide post fixed to the bottom of the top plate and passing through the second guide sleeve.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0022] In this invention, the PCB board welding structure for brushless motors involves a conveying assembly that transports the motor housing to the welding station during post-welding of the PCB board. A lifting assembly then lifts the motor housing from the support column until the PCB board comes into contact with the pressure bar. At this point, the operator can perform post-welding on the PCB board without removing the product from the conveying station or using additional fixtures to secure the motor housing. This improves welding efficiency and reduces costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a brushless motor.

[0024] Figure 2 This is a schematic diagram of the structure of this utility model;

[0025] Figure 3 This is a top view of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the conveying assembly of this utility model;

[0027] Figure 5 This is a schematic diagram of the lifting assembly of this utility model;

[0028] Figure 6 This is a structural schematic diagram of the lifting component of this utility model from another angle;

[0029] Figure 7 This is a partial structural schematic diagram of the lifting component of this utility model;

[0030] Figure 8 This is a schematic diagram of the pressing assembly of this utility model;

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Conveying assembly; 101. Support plate; 102. Fixture plate; 103. Positioning hole; 104. Mounting block; 105. First through slot; 106. Support column; 107. Limiting column;

[0033] 2. Lifting assembly; 201. First fixing plate; 202. First guide post; 203. Connecting plate; 204. Positioning post; 205. Second through slot; 206. First lifting cylinder; 207. Lifting plate; 208. First fixing post; 209. First guide sleeve; 210. Transition plate; 211. Second lifting cylinder; 212. Second guide sleeve; 213. Second guide post; 214. Top plate; 215. Screw; 216. Upper adjusting nut; 217. Lower adjusting nut; 218. Pad;

[0034] 3. Pressing assembly; 301. Second fixing plate; 302. Second fixing post; 303. Top plate; 304. Third through groove; 305. First limiting plate; 306. Second limiting plate; 307. Adjusting plate; 308. Adjusting groove; 309. Pressure strip;

[0035] 4. Motor housing; 5. PCB board; 6. Lug; 7. Limiting hole. Detailed Implementation

[0036] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0037] like Figure 2 , 3 The diagram shows the PCB board welding structure for the brushless motor of this utility model, including a conveying assembly 1, a lifting assembly 2, and a pressing assembly 3. The conveying assembly 1 is used to convey the motor housing 4. When the motor housing 4 is conveyed to the welding station, the lifting assembly 2 lifts the motor housing 4 on the conveying assembly 1 until the PCB board 5 inside the motor housing 4 abuts against the pressing assembly 3, limiting the position of the lifted PCB board 5 and preventing it from shaking and affecting the welding effect during welding.

[0038] like Figure 4As shown, the conveying assembly 1 includes a support plate 101, a fixture plate 102, a positioning hole 103, a mounting block 104, a first through groove 105, a support column 106, and a limiting column 107. There are two support plates 101, which are fixed to the assembly machine platform by aluminum profiles (specifically, the aluminum profiles are fixed to the assembly machine platform by welding, and the support plates 101 are fixed to the top of the aluminum profiles by welding, so that the support plates 101 are supported by the aluminum profiles; the top of the assembly machine platform has a groove to avoid the position of the lifting assembly 2).

[0039] Two support plates 101 are spaced apart to facilitate the lifting of the lifting assembly 2. A jig plate 102 is movably mounted on top of the support plates 101. A ball screw is fixed to the top of the support plates 101, and the jig plate 102 is fixed to the sliding part of the ball screw. The ball screw drives the jig plate 102 to move along the length of the support plates 101, thereby realizing the transfer of the upper motor housing 4 (the ball screw is a commercially available standard part and is not shown in the figure).

[0040] Mounting block 104 is fixed to the top of fixture plate 102 by screws, and the first through slot 105 vertically penetrates the mounting block 104 and fixture plate 102, providing clearance for the lifting assembly 2 to push out when it lifts the motor housing 4. Support column 106 is integrally ring-shaped on the top of mounting block 104, and the support column 106 cooperates with the lug 6 of the motor housing 4 (e.g., ...). Figure 1 As shown, the motor housing 4 has three lugs 6 on its circumferential ring. Therefore, the mounting block 104 also has three support posts 106 on its circumferential ring, and the positions of the support posts 106 and the lugs 6 correspond one-to-one.

[0041] The limiting post 107 is integrally connected to the top of the support post 106, and the diameter of the limiting post 107 is smaller than the diameter of the support post 106. The limiting post 107 cooperates with the limiting hole 7 of the lug 6. In the assembly process, the limiting hole 7 of the lug 6 is inserted into the limiting post 107, and the lug 6 abuts against the top of the support post 106, thereby supporting the motor housing 4 and facilitating the previous process of installing the PCB board 5 into the motor housing 4.

[0042] The positioning hole 103 penetrates through the fixture plate 102. The positioning hole 103 cooperates with the positioning post 204 in the lifting assembly 2. When fixing the connecting plate 203 to the bottom of the fixture plate 102, first insert the positioning post 204 at the top of the connecting plate 203 into the positioning hole 103 on the fixture plate 102, and then fix the connecting plate 203 and the fixture plate 102 together by tightening screws, thereby improving the positioning accuracy.

[0043] The lifting assembly 2 is fixed to the bottom of the fixture plate 102 and moves synchronously with the fixture plate 102. When the ball screw drives the fixture plate 102 to the welding station, the lifting assembly 2 lifts the motor housing 4. Figure 5-7 As shown, the lifting assembly 2 includes a first fixing plate 201, a first guide post 202, a connecting plate 203, a positioning post 204, a second through groove 205, a first lifting cylinder 206, a lifting plate 207, a first fixing post 208, a first guide sleeve 209, a transition plate 210, a second lifting cylinder 211, a second guide sleeve 212, a second guide post 213, a top plate 214, a screw 215, an upper adjusting nut 216, a lower adjusting nut 217, and a pad 218. The positioning post 204 is integrally connected to the top of the connecting plate 203 and mates with the positioning hole 103 on the fixture plate 102. In actual fixing, the positioning post 204 on the top of the connecting plate 203 is first inserted into the positioning hole 103 on the fixture plate 102, and then the connecting plate 203 and the fixture plate 102 are fixed together by screws, which improves the positional accuracy of the fixing.

[0044] The second through slot 205 vertically penetrates the connecting plate 203. The second through slot 205 cooperates with the top plate 214. When the top plate 214 rises to lift the motor housing 4 supported on the support column 106, the top plate 214 passes through the second through slot 205 to avoid interference with the connecting plate 203.

[0045] There are two first guide posts 202, which are fixed to the bottom of the connecting plate 203 by screws. The first fixing plate 201 is fixed to the bottom of the first guide posts 202 by screws. The first lifting cylinder 206 is fixed to the top of the first fixing plate 201 and is used to drive the transition plate 210 to move up and down. Specifically, the cylinder body of the first lifting cylinder 206 is fixed to the top of the first fixing plate 201 by screws, and the piston rod of the first lifting cylinder 206 extends away from the first fixing plate 201.

[0046] The lifting plate 207 is fixed to the piston rod of the first lifting cylinder 206 by screws, and the first lifting cylinder 206 drives the lifting plate 207 to move up and down. The first fixing column 208 is fixed to the top of the lifting plate 207 by screws, and the transition plate 210 is fixed to the top of the first fixing column 208 by screws. Therefore, the lifting plate 207, the first fixing column 208, and the transition plate 210 are fixed as a whole. When the first lifting cylinder 206 drives the lifting plate 207 to move up and down, it will drive the transition plate 210 to move up and down synchronously.

[0047] The first guide sleeve 209 is embedded in the transition plate 210 and sleeved on the first guide post 202. When the first lifting cylinder 206 drives the transition plate 210 to rise and fall, the first guide sleeve 209 will rise and fall synchronously along the first guide post 202 to improve the stability of the rising and falling movement of the transition plate 210.

[0048] The cylinder body of the second lifting cylinder 211 is fixed to the top of the lifting plate 207 by screws, that is, fixed to the side of the lifting plate 207 away from the first fixed plate 201 (e.g., Figure 7 As shown, a through slot is provided on the transition plate 210 to facilitate the installation of the second lifting cylinder 211. The top plate 214 is fixed to the piston rod of the second lifting cylinder 211 by screws. The second lifting cylinder 211 drives the top plate 214 to move up and down, thereby lifting the motor housing 4 supported on the support column 106.

[0049] The second guide sleeve 212 is embedded in the transition plate 210, and the second guide post 213 is fixed to the bottom of the top plate 214 by screws and passes through the second guide sleeve 212. When the second lifting cylinder 211 drives the top plate 214 to move up and down, it will drive the second guide post 213 to move up and down synchronously along the second guide sleeve 212, thereby improving the stability of the lifting movement of the top plate 214.

[0050] There are at least three sets of push rods, arranged in a ring around the top plate 214, used to lift the motor housing 4 supported on the support column 106. Each set of push rods includes a screw 215, an upper adjusting nut 216, a lower adjusting nut 217, and a pad 218. The top plate 214 has threaded holes, and the outer circumferential surface of the screw 215 is provided with external threads that mate with the threaded holes. Therefore, the height of the screw 215 can be adjusted by turning the screw 215 to ensure that the three sets of screws 215 are in the same plane, thus preventing the motor housing 4 from being tilted when lifting the support column 106.

[0051] The upper adjusting nut 216 and the lower adjusting nut 217 are screwed onto the screw 215, with the upper adjusting nut 216 resting against the upper surface of the top plate 214 and the lower adjusting nut 217 resting against the lower surface of the top plate 214. By setting the upper adjusting nut 216 and the lower adjusting nut 217, the adjusted screw 215 is limited to prevent it from loosening and changing the adjusted position height.

[0052] The pad 218 is fixed to the top of the screw 215, and the diameter of the pad 218 is larger than the diameter of the screw 215. When the top plate 214 rises, the pad 218 lifts the motor housing 4 supported on the support column 106. The large diameter pad 218 can improve the stability during lifting.

[0053] The pressing component 3 is fixed on the assembly machine and mounted on the conveying component 1. The lifting component 2 lifts the motor housing 4 on the support column 106 until the PCB board 5 abuts against the pressing component 3, thereby positioning the PCB board 5 inside the motor housing 4 and preventing the PCB board 5 from becoming loose and affecting the final welding effect. Figure 8 As shown, the pressing assembly 3 includes a second fixing plate 301, a second fixing post 302, a top plate 303, a third through groove 304, a first limiting plate 305, a second limiting plate 306, an adjusting plate 307, an adjusting groove 308, and a pressure strip 309. The second fixing plate 301 is fixed to the assembly machine platform by screws.

[0054] The second fixing post 302 is fixed to the top of the second fixing plate 301 by screws, and the top plate 303 is fixed to the top of the second fixing post 302 by screws and is located above the jig plate 102. The third through slot 304 penetrates the top plate 303, providing clearance space for the lifting of the motor housing 4.

[0055] The first limiting plate 305 and the second limiting plate 306 are fixed to the top of the top plate 303 by screws, and a limiting groove is formed between the first limiting plate 305 and the second limiting plate 306. The adjusting plate 307 is stuck in the limiting groove and can move its position along the limiting groove, thereby adjusting its position on the PCB board 5 according to different welding positions.

[0056] The adjusting groove 308 passes through the adjusting plate 307. The adjusting groove 308 is a rounded rectangle. A through hole is provided on the top plate 303. After the position of the adjusting plate 307 is adjusted, the fastening bolt is passed through the adjusting groove 308 and the through hole, and a fastening nut is used on the other side to complete the fixing of the adjusting plate 307.

[0057] The pressure strip 309 is integrally connected to the inner side of the adjustment plate 307 and extends into the third through groove 304. When the lifting component 2 lifts the motor housing 4 on the support column 106, the pressure strip 309 presses against the top of the PCB board 5 to prevent the PCB board 5 from shaking during welding.

[0058] Furthermore, by setting the first lifting cylinder 206 and the second lifting cylinder 211 to lift out in two separate stages, the lifting height requirements are met, and the lifting process is ensured to be more stable.

[0059] The working principle of the PCB board welding structure for the brushless motor of this utility model is as follows:

[0060] First, the conveying assembly 1 transports the motor housing 4 to the welding station. The lifting assembly 2 lifts the motor housing 4 on the support column 106 until the PCB board 5 and the pressure bar 309 come into contact. At this point, the operator can perform post-welding on the PCB board 5 without removing the product from the conveying station or using additional fixtures to fix the motor housing 4, which improves welding efficiency and reduces cost.

[0061] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A PCB welding structure for a brushless motor, the brushless motor comprising a motor housing (4), a lug (6) integrally provided around an outer circumferential surface of the motor housing (4), a limiting hole (7) penetrating through the lug (6), and a PCB (5) installed in the motor housing (4), characterized in that, It includes: A conveying assembly (1) comprising support plates (101) arranged at intervals, a jig plate (102) movably arranged on top of the support plates (101), and a limiting mechanism fixed on top of the jig plate (102), and the motor shell (4) is placed on the limiting mechanism; A jacking assembly (2) comprising a connecting plate (203) fixed on the bottom of the jig plate (102), a second through slot (205) penetrating through the connecting plate (203), a transition plate (210) arranged below the connecting plate (203) in a liftable manner, and a jacking mechanism arranged on top of the transition plate (210) in a liftable manner, the jacking mechanism passes through the second through slot (205) to jack up the motor shell (4) on the limiting mechanism; A pressing assembly (3) comprising a frame erected on the conveying assembly (1), an adjusting plate (307) adjustably arranged on top of the frame, and a pressing strip (309) integrally connected to the bottom of the adjusting plate (307) and used for pressing the PCB board (5).

2. The PCB board welding structure for a brushless motor according to claim 1, characterized in that: The limiting mechanism comprises a mounting block (104) embedded in the jig plate (102), a first through slot (105) penetrating through the mounting block (104), a support column (106) arranged around the top of the mounting block (104), and a limiting column (107) integrally connected to the top of the support column (106). The diameter of the limiting column (107) is smaller than the diameter of the support column (106), the lug (6) abuts against the top of the support column (106), and the limiting hole (7) is inserted on the limiting column (107).

3. The PCB board welding structure for a brushless motor according to claim 1, characterized in that: The jacking mechanism comprises a top disc (214) arranged on top of the transition plate (210) in a liftable manner and matched with the second through slot (205), and a top rod arranged on the top disc (214) in a height-adjustable manner, the top disc (214) passes through the second through slot (205), and the motor shell (4) on the limiting mechanism is jacked up by the top rod.

4. The PCB board welding structure for a brushless motor according to claim 3, characterized in that: The top rod comprises a screw rod (215) screwed on the top disc (214), a pad (218) fixed on the top of the screw rod (215), and an upper adjusting nut (216) and a lower adjusting nut (217) screwed on the screw rod (215), the upper adjusting nut (216) abuts against the upper surface of the top disc (214), and the lower adjusting nut (217) abuts against the lower surface of the top disc (214).

5. The PCB board welding structure for a brushless motor according to claim 1, characterized in that: The pressing assembly (3) further comprises first and second limiting plates (305) and (306) fixed at intervals on top of the frame, a limiting groove formed between the first and second limiting plates (305) and (306), and an adjusting groove (308) penetrating through the adjusting plate (307), and the adjusting plate (307) is clamped in the limiting groove.

6. The PCB board welding structure for a brushless motor according to claim 3, characterized in that: The jacking assembly (2) further comprises a first guide column (202) fixed at the bottom of the connecting plate (203), a first fixed plate (201) fixed at the bottom of the first guide column (202), a first guide sleeve (209) embedded in the transition plate (210) and sleeved on the first guide column (202), a first jacking cylinder (206) fixed on the first fixed plate (201), a jacking plate (207) connected with the first jacking cylinder (206), and a first fixed column (208) fixed between the jacking plate (207) and the transition plate (210).

7. The PCB board welding structure for a brushless motor according to claim 6, characterized in that: The jacking assembly (2) further comprises a second jacking cylinder (211) fixed at the top of the jacking plate (207) and connected with a top disc (214), a second guide sleeve (212) embedded in the transition plate (210), and a second guide column (213) fixed at the bottom of the top disc (214) and penetrating through the second guide sleeve (212).

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