Automatic press-fitting equipment for stator

Abstract

The present invention relates to an automatic press-fitting device for a stator, which comprises: a bearing structure, wherein the bearing structure comprises a bearing frame, an inner gauge fixed on the top of the bearing frame, a tray escalably mounted on the inner gauge, and an insertion rod arranged around the top of the bearing frame and penetrating the tray, wherein the wire slots of the stator sheets are inserted into the insertion rod; a press-fitting structure, wherein the press-fitting structure comprises a press-fitting frame mounted above the bearing frame, a press-fitting frame escalably arranged at the bottom of the press-fitting frame, a pressing plate fixed at the bottom of the pressing frame, an outer gauge fixed at the bottom of the pressing plate, a pressing block elastically arranged at the bottom of the pressing plate and abutting against the inner side wall of the outer gauge, and a slot arranged around the bottom of the pressing block; the entire press-fitting process of the automatic press-fitting device for a stator of the present invention does not require manual intervention, and each stator sheet is positioned during placement and press-fitting, thereby improving the press-fitting efficiency of the stator sheets and the qualified rate of the finished stator after press-fitting, and saving labor input and cost.

Description

Technical Field

[0001] The invention belongs to the technical field of stator assembly, and in particular relates to automatic press-fitting equipment for a stator. Background Art

[0002] The stator is the stationary part of the motor. The stator consists of three parts: the stator core, the stator winding and the frame. The main function of the stator is to generate a rotating magnetic field, while the main function of the rotor is to be cut by the magnetic lines of force in the rotating magnetic field to generate (output) current. When the stator is processed and produced, a single stator sheet is usually stamped out on a silicon steel plate using a stamping process, and then the stator sheets are stacked and bonded together using an adhesive method to form a stator.

[0003] In the existing stator assembly process, the glue-coated stator sheets need to be placed on the stator fixture plate one by one, and then pressed down by the operator to complete the stacking and bonding of the stator sheets.

[0004] The pressing force cannot be controlled during press-fitting, resulting in different degrees of pressing between two adjacent layers of stator sheets, which may lead to over-pressing or under-pressing. At the same time, there are placement errors in the manual placement of stator sheets, and it is easy for the wire slots of the stator sheets to not correspond. The overall press-fitting efficiency is low, and the qualified rate of the finished stators cannot be guaranteed. Summary of the invention

[0005] The invention provides an automatic press-fitting device for a stator, which solves the defects of low press-fitting efficiency and failure to ensure the qualified rate of finished stators in the manual press-fitting of stator sheets in the prior art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: an automatic press-fitting device for a stator, which comprises:

[0007] A bearing structure, the bearing structure comprising a bearing frame, an inner gauge fixed on the top of the bearing frame, a tray movably mounted on the inner gauge, and an insertion rod ring-mounted on the top of the bearing frame and penetrating the tray, the wire slot of the stator sheet is inserted in the insertion rod, and the inner gauge is used to limit the inner side wall of the stator sheet;

[0008] A press-fitting structure, the press-fitting structure comprising a press-fitting frame mounted above the carrier frame, a press-fitting frame escalably arranged at the bottom of the press-fitting frame, a pressing plate fixed at the bottom of the pressing plate, an outer gauge fixed at the bottom of the pressing plate, a pressing block elastically arranged at the bottom of the pressing plate and abutting against the inner side wall of the outer gauge, and a slot arranged around the bottom of the pressing block;

[0009] When the pressing frame descends, the pressing block presses against the upper surface of the stator sheet, the slot is used to limit the insertion rod, and the outer gauge is used to limit the outer side wall of the stator sheet;

[0010] The transfer structure is arranged on one side of the bearing structure and is used for clamping and transferring the press-fitted stator.

[0011] Optimally, the supporting structure also includes a main slide plate slidably connected to the supporting frame, a first inclined pin surface obliquely opened at the top of the main slide plate, a secondary slide plate arranged at the top of the main slide plate, a second inclined pin surface obliquely opened at the bottom of the secondary slide plate and matching with the first inclined pin surface, a top plate fixed on the top of the secondary slide plate, and a top column ring-arranged on the top of the top plate and fixed to the tray.

[0012] Optimally, the press-fitting structure also includes a transition block fixed on the top of the press frame, a transition groove opened at the bottom of the transition block, a through hole coaxially passing through the transition block and connected to the transition groove, a pressure sensor fixed on the top of the press frame and located in the transition groove, a connecting rod that can be raised and lowered and passes through the through hole, and a contact block fixed at the bottom of the connecting rod and matched with the pressure sensor, wherein the diameter of the contact block is larger than the diameter of the through hole.

[0013] Optimally, the press-fitting structure also includes a slot opened at the top of the pressure plate, a through slot opened at the bottom of the slot and passing through the pressure plate, a fixing column fixed at the top of the pressure block and passing through the through slot, and a card plate fixed at the top of the fixing column, wherein the diameter of the card plate is larger than the diameter of the fixing column.

[0014] Optimally, the press-fitting structure further comprises a spring groove provided at the bottom of the pressure plate, a spring arranged in the spring groove and resting against the top of the pressure block, and a second guide surface obliquely arranged on the inner side wall of the outer gauge.

[0015] Optimally, the bearing structure also includes a lifting plate that is liftably arranged on the inner side of the bearing frame, a first guide surface that is obliquely arranged on the top of the inner gauge, and a guide portion that is obliquely arranged on the top of the insertion rod, and the lifting plate is against the bottom of the top plate.

[0016] Optimally, the bearing structure also includes a guide plate fixed at intervals at the top of the bearing frame, a first wear-resistant plate fixed in the guide plate, a second wear-resistant plate fixed at the bottom of the main slide and abutting against the first wear-resistant plate, a third wear-resistant plate fixed at the top of the main slide, and a fourth wear-resistant plate fixed at the bottom of the auxiliary slide and abutting against the third wear-resistant plate.

[0017] Optimally, the transfer structure includes a first movable plate slidably connected to one side of the bearing structure, a transfer frame slidably connected to the top of the first movable plate, a corner plate liftably arranged on the transfer frame near the side of the bearing frame, and a clamping assembly fixed on the corner plate, the first movable plate is perpendicular to the moving direction of the transfer frame, and the clamping assembly is used to clamp and transfer the press-assembled stator.

[0018] Optimally, the clamping assembly includes a finger cylinder fixed to one side of the angle plate, a clamping plate fixed to the finger cylinder, a clamping block provided on the opposite side of the clamping plate, and an avoidance arc provided on the inner side of the clamping block.

[0019] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] The automatic stator press-fitting equipment of the present invention has a high degree of automation, wherein the bearing structure is used to receive the stator sheets transferred thereto by a robot, and the press-fitting structure presses the stator sheets placed on the bearing structure in sequence, and when the press-fitting thickness of the stator sheets reaches the design requirement, the transfer structure clamps the press-fitted finished stator and transfers it to a subsequent conveyor belt to be transported to a subsequent assembly station; the entire press-fitting process does not require manual intervention, and each stator sheet is positioned during placement and press-fitting, thereby improving the press-fitting efficiency of the stator sheets and the qualified rate of the finished stators after press-fitting, and saving labor input and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the bearing structure of the present invention;

[0023] Figure 3 It is a front view of the bearing structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the local structure of the bearing structure of the present invention;

[0025] Figure 5 It is a partial structural schematic diagram of the press-fit structure of the present invention;

[0026] Figure 6 For the present invention Figure 5 Schematic diagram of the structure after removing the transition block;

[0027] Figure 7 For the present invention Figure 5 Schematic diagram of the local structure;

[0028] Figure 8 For the present invention Figure 5 The structural diagram at the bottom;

[0029] Fig. 9 is a cross-sectional view of the pressing plate and the outer gauge of the present invention;

[0030] Fig.10 is a cross-sectional view of the pressing plate and the outer gauge of the present invention;

[0031] Fig.11 It is a structural schematic diagram of the transition block of the present invention;

[0032] Fig.12 It is a structural schematic diagram of the transfer structure of the present invention;

[0033] Fig.13 It is a partial structural schematic diagram of the transfer structure of the present invention;

[0034] Description of reference numerals:

[0035] 1. Bearing structure; 101. Bearing frame; 102. Guide plate; 103. First wear-resistant plate; 104. Second wear-resistant plate; 105. Main slide plate; 106. First oblique pin surface; 107. Third wear-resistant plate; 108. Second slide plate; 109. Second oblique pin surface; 110. Fourth wear-resistant plate; 111. Push cylinder; 112. Lifting cylinder; 113. Lifting plate; 114. Connecting plate; 115. Top plate; 116. Fixed plate; 117. Top column; 118. Tray; 119. Boss; 120. Insert rod; 121. Guide part; 122. Inner gauge; 123. First guide surface;

[0036] 2. Press-fit structure; 201. Press-fit frame; 202. Press frame; 203. Transition block; 204. Transition groove; 205. Through hole; 206. Link rod; 207. Contact block; 208. Pressure sensor; 209. Press plate; 210. External gauge; 211. Groove; 212. Second guide surface; 213. Press block; 214. Spring groove; 215. Spring; 216. Card slot; 217. Through groove; 218. Card plate; 219. Fixed column; 220. Slot; 221. First avoidance groove; 222. Second avoidance groove;

[0037] 3. Transfer structure; 301. First movable plate; 302. Second movable plate; 303. Transfer frame; 304. Angle plate; 305. Finger cylinder; 306. Clamp; 307. Avoidance arc; 308. Fixing groove; 309. Clamp block. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0039] like Figure 1 As shown, it is a schematic diagram of the structure of the automatic press-fitting equipment for stators of the present invention, which is usually used to press-fit and bond stator sheets together to form a stator, and the equipment includes a bearing structure 1, a press-fitting structure 2 and a transfer structure 3. The bearing structure 1 is used to receive the stator sheets transferred thereto by the robot, and the press-fitting structure 2 presses the stator sheets placed on the bearing structure 1 in sequence. When the press-fitting thickness of the stator sheets reaches the design requirement, the transfer structure 3 clamps the press-fitted finished stator and transfers it to the subsequent conveyor belt to be transported to the subsequent assembly station.

[0040] like Figure 2-4, which is a schematic diagram of the structure of the bearing structure 1, the bearing structure 1 is used to receive the stator sheet transferred thereto by the robot, and the bearing structure 1 includes a bearing frame 101, a first lifting assembly, a second lifting assembly, a top plate 115, a fixed plate 116, a top column 117, a tray 118, a boss 119, an insertion rod 120, a guide portion 121, an inner gauge 122 and a first guide surface 123. The bearing frame 101 is welded from aluminum profiles, and the bearing frame 101 is fixed on the assembly machine by screws, and mainly plays a supporting role.

[0041] The fixed plate 116 is fixed to the top of the carrier 101 by screw fastening, and the inner gauge 122 is fixed to the top of the fixed plate 116, and is used to perform preliminary positioning of each stator sheet clamped here by the robot arm to avoid deviation in the placement of the stator sheet, which affects the subsequent press-fitting of the stator sheet, and also prevents the stator sheet from being tilted and causing damage to the machine (the outer diameter of the inner gauge 122 is equal to the inner diameter of the stator sheet, so the function of the inner gauge 122 is to position the inner wall of the stator sheet).

[0042] The first guide surface 123 is obliquely opened at the top of the inner gauge 122 , and guides the inner side wall of the stator sheet when the stator sheet is placed, so as to ensure that the stator sheet is more easily placed on the inner gauge 122 .

[0043] The plug rod 120 is fixed on the top of the fixed plate 116 and is arranged around the outside of the inner gauge 122. The plug rod 120 matches the shape of the wire slot of the stator sheet. When inserting the stator sheet, the inner wall of the stator sheet is inserted on the inner gauge 122, and the wire slot of the stator sheet is inserted on the plug rod 120. The guide part 121 is inclined at the top of the plug rod 120 to guide the wire slot of the stator sheet, ensuring that the stator sheet is more easily inserted on the plug rod 120.

[0044] The tray 118 is sleeved on the inner gauge 122 and the top of the tray 118 is integrally connected with a boss 119. The tray 118 and the boss 119 are provided with grooves matching the insertion rod 120 to avoid the position of the insertion rod 120. The tray 118 is not fixedly connected to the inner gauge 122. The tray 118 can move up and down along the inner gauge 122 driven by the first and second lifting assemblies at the bottom. Every time the manipulator places a stator sheet on the boss 119, the first lifting assembly drives the tray 118 to descend by the thickness of a stator sheet, ensuring that the press-fitting structure 2 descends the same distance each time for press-fitting, thereby ensuring the consistency of the press-fitting bonding effect of each layer of stator sheets, and avoiding excessive press-fitting or inadequate press-fitting.

[0045] The top column 117 is fixed to the bottom of the tray 118 and passes through the fixed plate 116 and the support frame 101. The top plate 115 is fixed to the bottom of the top column 117. The first jacking assembly and the second jacking assembly are connected to the top plate 115 to drive the top plate 115 to perform lifting movements, thereby driving the upper tray 118 to perform lifting movements.

[0046] The first lifting assembly includes a guide plate 102, a first wear-resistant plate 103, a second wear-resistant plate 104, a main slide 105, a first bevel pin surface 106, a third wear-resistant plate 107, an auxiliary slide 108, a second bevel pin surface 109, a fourth wear-resistant plate 110 and a pushing cylinder 111. Each time the manipulator places a stator sheet on the boss 119, the first lifting assembly drives the tray 118 to descend a distance equal to the thickness of a stator sheet, ensuring that the press-fitting structure 2 descends the same distance each time, thereby ensuring the consistency of the press-fitting bonding effect of each layer of stator sheets, and avoiding excessive press-fitting or inadequate press-fitting.

[0047] There are two guide plates 102, which are fixed on the carrier 101 at intervals, and a guide groove is formed between the two guide plates 102 arranged at intervals, which linearly guides the sliding of the main slide 105 to prevent the main slide 105 from deviating during sliding, thereby affecting the lifting movement of the auxiliary slide 108. The first wear-resistant plate 103 is fixed on the carrier 101 and is located in the guide groove formed by the two guide plates 102.

[0048] The second wear-resistant plate 104 is fixed to the bottom of the main slide 105 and rests on the first wear-resistant plate 103. When the main slide 105 is pushed by the cylinder 111, the main slide 105 will drive the second wear-resistant plate 104 at the bottom to move synchronously. The second wear-resistant plate 104 is set in the guide groove formed by the two guide plates 102, and the width of the second wear-resistant plate 104 is equal to the distance between the two guide plates 102. The second wear-resistant plate 104 is guided by the guide plate 102, and then the sliding of the main slide 105 is linearly guided to prevent the main slide 105 from deviating when sliding, thereby affecting the lifting and lowering movement of the auxiliary slide 108.

[0049] By providing the first wear-resistant plate 103 and the second wear-resistant plate 104 that cooperate with each other, frequent friction can be avoided to cause wear of the main slide plate 105, and the accuracy of the lifting distance of the auxiliary slide plate 108 can be avoided. The main slide plate 105 is in the shape of a right triangle, the second wear-resistant plate 104 is fixed on a right angle side of the main slide plate 105, and the inclined surface of the main slide plate 105 is the first inclined pin surface 106.

[0050] The auxiliary slide 108 is fixed to the bottom of the top plate 115. The auxiliary slide 108 is in the shape of a right triangle. One of the right-angled sides of the auxiliary slide 108 is fixed to the bottom of the top plate 115. The inclined surface of the auxiliary slide 108 is the second inclined pin surface 109, and the second inclined pin surface 109 cooperates with the first inclined pin surface 106. Therefore, when the pushing cylinder 111 pushes the main slide 105 to move, the main slide 105 will push the auxiliary slide 108 to perform lifting motion, thereby driving the upper top plate 115 and the tray 118 to perform lifting motion.

[0051] To prevent wear at the contact point between the main slide 105 and the auxiliary slide 108 , a third wear-resistant plate 107 is fixed to the first inclined pin surface 106 of the main slide 105 , and a fourth wear-resistant plate 110 is fixed to the second inclined pin surface 109 of the auxiliary slide 108 .

[0052] By setting the main slide plate 105 and the auxiliary slide plate 108 that cooperate with each other, the linear motion of the push cylinder 111 is converted into a lifting motion, so as to avoid the press-fitting action of the press-fitting structure 2. If the lifting cylinder 112 is directly connected to the top plate 115 to drive the top plate 115 to do the lifting motion, then when the press-fitting structure 2 presses the stator sheet downward, the vertical downward pressure will directly act on the lifting cylinder 112. Frequent pressurization will damage the lifting cylinder 112, resulting in a decrease in its accuracy. At the same time, it will also cause the downward pressing distance to be inconsistent, which will also affect the qualified rate of the stator finished product.

[0053] By setting a main slide 105 and a sub-slide 108 that cooperate with each other, the linear motion of the push cylinder 111 is converted into a lifting motion, so as to avoid the pressing action of the press-fitting structure 2. The vertical pressure of the press-fitting structure 2 acts downward on the main slide 105 and the sub-slide 108, and has less impact on the push cylinder 111 on one side; and the main slide 105 is in contact with the carrier 101. During press-fitting, the bottom of the stator sheet is a rigid support rather than a floating support of the lifting cylinder 112. The rigid support has a better pressing effect, ensuring that the press-fitting structure 2 descends the same distance for each press-fitting, thereby ensuring the consistency of the press-fitting bonding effect of each layer of stator sheets, and avoiding excessive press-fitting or inadequate press-fitting.

[0054] The second lifting mechanism includes a lifting cylinder 112, a lifting plate 113 and a connecting plate 114. The lifting plate 113 is slidably connected to the inner side of the carrier 101 through a slide rail and a slider, and abuts against the lower surface of the top plate 115 (the lifting plate 113 and the top plate 115 are only abutted against each other, but not fixedly connected). The lifting cylinder 112 is fixed to the outer side of the carrier 101, one side of the connecting plate 114 is fixed to the bottom of the lifting plate 113, and the other side of the connecting plate 114 is connected to the piston rod of the lifting cylinder 112. The lifting cylinder 112 drives the connecting plate 114 and the lifting plate 113 to perform lifting and lowering movements, thereby driving the top plate 115 to perform lifting and lowering movements.

[0055] When the stator sheet press-fit thickness reaches the design requirement, the second jacking assembly assists the first jacking assembly to lift the stator, and the transfer structure 3 clamps the pressed finished stator and transfers it to the subsequent conveyor belt to be transported to the subsequent assembly station (because the stator is usually made of hundreds of stator sheets stacked and bonded together, its weight is relatively large, and the pushing cylinder 111 is set horizontally at this time. If the stator is lifted only by the pushing cylinder 111, it is more difficult; and in order to ensure the accuracy of the pushing cylinder 111, the ejection speed should not be too high, so the second jacking assembly assists the first jacking assembly to lift the stator).

[0056] After the stator is ejected, the second jacking assembly is reset to its original position. At this time, the top plate 115 is still under the control of the first jacking assembly to prevent the downward pressing action of the press-fitting structure 2 from affecting the second jacking assembly.

[0057] The press-fitting structure 2 is arranged above the bearing structure 1 and is used to press-fit the stator sheets placed on the bearing structure 1 in sequence. Figure 5-8 As shown, the press-fitting structure 2 includes a press-fitting frame 201, a press frame 202, a transition block 203, a transition groove 204, a through hole 205, a connecting rod 206, a contact block 207, a pressure sensor 208, a pressing plate 209, an outer gauge 210, a groove 211, a second guide surface 212, a press block 213, a spring groove 214, a spring 215, a clamping groove 216, a through groove 217, a clamping plate 218, a fixing column 219, a slot 220, a first avoidance groove 221 and a second avoidance groove 222. The press-fitting frame 201 is fixed on the assembly machine by screw fastening and is located above the bearing structure 1.

[0058] The press frame 202 is slidably connected to one side of the press frame 201 through a slide rail and a slider. A downward pressure cylinder (the downward pressure cylinder is a commercially available single-acting cylinder) is fixed to the top of the press frame 201. The press frame 202 is driven down by the downward pressure cylinder to press the stator sheets placed on the bearing structure 1 one by one.

[0059] like Figure 5 , 6 As shown, the transition block 203 is fixed on the top of the press frame 202. Fig.11 , which is a schematic diagram of the structure of the transition block 203. The transition groove 204 is opened at the bottom of the transition block 203 to avoid the pressure sensor 208 on the top of the pressure frame 202. The through hole 205 passes through the transition block 203 and is connected to the transition groove 204. The through hole 205 and the transition block 203 are coaxially arranged.

[0060] The connecting rod 206 is connected to the piston rod of the downward pressure cylinder and passes through the through hole 205. The contact block 207 is fixed at the bottom of the connecting rod 206 and placed in the transition groove 204. The contact block 207 cooperates with the pressure sensor 208 below to ensure that the pressure of each downward pressure is the same, thereby ensuring the consistency of the press-fitting and bonding effect of each layer of stator sheets, avoiding excessive press-fitting or inadequate press-fitting.

[0061] The diameter of the contact block 207 is larger than the diameter of the through hole 205, so the contact block 207 will be stuck at the bottom of the through hole 205 to prevent the press frame 202 from falling. At the same time, relying on the cooperation of the contact block 207 and the pressure sensor 208, it can also ensure that the pressure of each press is the same, avoiding the situation of over-pressing or under-pressing.

[0062] like Figure 7 , 8 As shown, the pressing plate 209 is fixed at the bottom of the pressing frame 202. As the pressing frame 202 rises and falls synchronously, the outer gauge 210 is fixed at the bottom of the pressing plate 209. The groove 211 is opened on the inner side of the outer gauge 210 and is coaxially arranged with the outer gauge 210. The inner diameter of the outer gauge 210 is equal to the outer diameter of the stator sheet. Each stator sheet is repositioned during press-fitting to avoid deviation in the placement of the stator sheet, which affects the subsequent press-fitting of the stator sheet. At the same time, it can also avoid the stator sheet being placed crooked and causing damage to the machine (the inner diameter of the outer gauge 210 is equal to the outer diameter of the stator sheet, so the role of the outer gauge 210 is to position the outer wall of the stator sheet).

[0063] The second guide surface 212 is obliquely opened on the inner side of the bottom of the outer gauge 210 , and guides the outer side wall of the stator sheet when the stator sheet is pressed downward, so as to ensure that the stator sheet can enter the outer gauge 210 more easily.

[0064] The pressing block 213 is elastically arranged at the bottom of the pressing plate 209 and the outer wall of the pressing block 213 contacts the inner wall of the outer gauge 210. When the pressing block 213 elastically presses the stator sheet downward, the movement of the pressing block 213 is guided by the outer gauge 210, thereby improving the effect of the stator sheet press-fitting. Fig. 9 , 10 As shown, the thickness of the pressing block 213 is smaller than the thickness of the outer gauge 210 , ensuring that the outer gauge 210 satisfies both the elastic guidance of the pressing block 213 and the positioning of the outer side wall of the stator sheet.

[0065] The slot 220 is arranged at the bottom of the pressing block 213 and corresponds to the position of the insertion rod 120 of the supporting structure 1. When the pressing block 213 moves downward to press the stator sheet, the insertion rod 120 will be inserted into the slot 220. Relying on the cooperation between the insertion rod 120 and the slot 220, the movement of the pressing block 213 can be guided and the pressing effect of the stator sheet can be improved.

[0066] like Figure 7-10As shown, the card slot 216 is opened at the top of the pressure plate 209, and the through slot 217 is opened at the bottom of the card slot 216 and passes through the pressure plate 209. The diameter of the card slot 216 is larger than the diameter of the through slot 217, so the connection between the card slot 216 and the through slot 217 forms a shoulder structure for clamping the card plate 218.

[0067] The fixing post 219 is fixed on the top of the pressing block 213 and passes through the through slot 217. The clamping plate 218 is fixed on the top of the fixing post 219 and placed in the clamping slot 216. The diameter of the clamping plate 218 is larger than the diameter of the fixing post 219. Therefore, when not pressed, the clamping plate 218 abuts against the lower surface of the clamping slot 216. At this time, there is a gap between the pressing block 213 and the pressing plate 209. Since the clamping plate 218 is stuck at the shoulder between the clamping slot 216 and the through slot 217, the pressing block 213 will not fall off. During press-fitting, the pressing plate 209 moves downward to press the uppermost stator sheet. At this time, the pressing block 213 rises to fit the pressing plate 209.

[0068] The spring slot 214 is provided at the bottom of the pressing plate 209, and the spring 215 is arranged in the spring slot 214 and abuts against the upper surface of the pressing block 213. Therefore, when not pressed, the clamping plate 218 abuts against the lower surface of the clamping slot 216, and at this time there is a gap between the pressing block 213 and the pressing plate 209. Since the clamping plate 218 is clamped at the shoulder between the clamping slot 216 and the through slot 217, the pressing block 213 will not fall, and the spring 215 is in an open state; during press-fitting, the pressing plate 209 moves downward to press against the stator sheet on the uppermost layer, and at this time the pressing block 213 rises to fit with the pressing plate 209, and at this time the spring 215 is in a compressed state, and the spring 215 is used to realize the elastic press-fitting of the pressing block 213, so as to avoid the rigid press-fitting from damaging the stator sheet (the press-fitting of the stator sheet is a bottom rigid support and a top elastic press-fitting).

[0069] The spring 215 here can not only play the role of elastic pressing to avoid the damage of the stator sheet by rigid pressing, but also has the more important role of material discharge: because during pressing, the pressing block 213 will be pressed and contacted with the uppermost stator sheet, and when the pressing block 213 is reset after pressing, it is easy to bring up the uppermost stator sheet again. Therefore, the reset movement of the spring 215 drives the pressing block 213 to reset, thereby assisting the discharge of the uppermost stator sheet.

[0070] The first avoidance groove 221 penetrates the pressing block 213 , and the second avoidance groove 222 penetrates the pressing plate 209 and is coaxially matched with the first avoidance groove 221 , so as to avoid the position of the inner gauge 122 and the occurrence of interference when the stator sheet is pressed.

[0071] When the stator sheet press-fit thickness reaches the design requirement, the transfer structure 3 clamps the press-fit finished stator and transfers it to the subsequent conveyor belt to be transported to the subsequent assembly station. Fig.12As shown, the transfer structure 3 includes a first moving plate 301, a second moving plate 302, a transfer frame 303, an angle plate 304 and a clamping assembly. The first moving plate 301 is slidably connected to the top of the assembly machine through a slide rail and a slider, and the second moving plate 302 is slidably connected to the top of the first moving plate 301 through a slide rail and a slider (the first moving plate 301 and the second moving plate 302 are both driven by a linear cylinder, and the moving directions of the first moving plate 301 and the second moving plate 302 are perpendicular to each other).

[0072] The transfer frame 303 is fixed on the top of the second movable plate 302, and the angle plate 304 is slidably connected to the side of the transfer frame 303 close to the carrier frame 101 through a slide rail and a slider. A lifting cylinder connected to the angle plate 304 is fixed on the transfer frame 303. The clamping assembly is fixed on the angle plate 304, which is used to clamp the press-fitted finished stator and transfer it to the subsequent conveyor belt to be transported to the subsequent assembly station, such as Fig.13 As shown, the clamping assembly includes a finger cylinder 305 , a clamping plate 306 , an avoidance arc 307 , a fixing groove 308 and a clamping block 309 .

[0073] The finger cylinder 305 is fixed on the angle plate 304. There are two clamping plates 306, which are fixed on the finger cylinder 305 respectively. The clamping plates 306 are driven by the finger cylinder 305 to move inward, thereby completing the clamping work of the finished stator. The clamping block 309 is fixed on the inner side of the clamping plate 306. When the clamping plate 306 moves inward, the finished stator on the tray 118 is clamped by the clamping block 309.

[0074] The material of the clamp block 309 is rubber, which can avoid scratching the side wall of the stator when clamping the stator. The inner side of the clamp block 309 is provided with an avoidance arc 307. Because the finished stator is made of multiple stator sheets stacked and bonded, it is cylindrical, so the avoidance arc 307 is used to avoid the structure in the diameter direction of the finished stator, so as to facilitate the clamping of the clamp block 309.

[0075] The working principle of the automatic stator press-fitting device of the present invention is as follows:

[0076] A glue dipping tray is provided on one side of the press-fitting device. The stator sheet to be press-fitted is firstly clamped by a robot and placed in the glue dipping tray. After the lower surface of the stator sheet is glued with glue, the robot clamps it onto the tray 118 of the bearing structure 1.

[0077] The bearing structure 1 is used to receive the stator sheets transferred thereto by the robot. The pressing structure 2 presses the stator sheets placed on the bearing structure 1 in sequence. When the stator sheet pressing thickness reaches the design requirement, the transfer structure 3 clamps the pressed finished stator and transfers it to the subsequent conveyor belt for transportation to the subsequent assembly station.

[0078] The stator sheets are positioned during placement by the cooperation of the insertion rod 120 and the inner gauge 122; the stator sheets are positioned during press-fitting by the cooperation of the slot 220 and the outer gauge 210, and the elastically arranged pressing block 213 prevents the stator sheets from being damaged by rigid press-fitting, and also prevents the top stator sheets from being lifted up after press-fitting.

[0079] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic press-fitting device for a stator, wherein the stator is formed by laminating and bonding stator sheets, characterized in that it include: A bearing structure (1), the bearing structure (1) comprising a bearing frame (101), an inner gauge (122) fixed on the top of the bearing frame (101), a tray (118) which is escapable and sleeved on the inner gauge (122), an insertion rod (120) which is arranged around the top of the bearing frame (101) and passes through the tray (118), and a boss (119) which is integrally connected to the top of the tray (118), wherein the wire slot of the stator sheet is inserted in the insertion rod (120), and the inner gauge (122) is used to limit the inner side wall of the stator sheet; for each stator sheet placed on the boss (119), the tray (118) is lowered by a distance corresponding to the thickness of one stator sheet; A press-fitting structure (2), the press-fitting structure (2) comprising a press-fitting frame (201) mounted above a carrier frame (101), a press-fitting frame (202) movably arranged at the bottom of the press-fitting frame (201), a pressing plate (209) fixed at the bottom of the pressing plate (202), an outer gauge (210) fixed at the bottom of the pressing plate (209), a pressing block (213) elastically arranged at the bottom of the pressing plate (209) and abutting against the inner wall of the outer gauge (210), a slot (220) arranged around the bottom of the pressing block (213), a spring slot (214) provided at the bottom of the pressing plate (209), and a spring (215) arranged in the spring slot (214) and abutting against the top of the pressing block (213), wherein the thickness of the pressing block (213) is less than the thickness of the outer gauge (210); The pressing block (213) is driven to reset by the reset movement of the spring (215), thereby assisting the blanking of the uppermost stator sheet; When the pressing frame (202) descends, the pressing block (213) presses against the upper surface of the stator sheet, the slot (220) is used to limit the insertion rod (120), and the outer gauge (210) is used to limit the outer side wall of the stator sheet; A transfer structure (3) is arranged on one side of the bearing structure (1) and is used for clamping and transferring the press-fitted stator.

2. The automatic stator press-fitting device according to claim 1, characterized in that: The bearing structure (1) also includes a main slide (105) slidably connected to the bearing frame (101), a first inclined pin surface (106) obliquely opened at the top of the main slide (105), an auxiliary slide (108) arranged at the top of the main slide (105), a second inclined pin surface (109) obliquely opened at the bottom of the auxiliary slide (108) and matched with the first inclined pin surface (106), a top plate (115) fixed on the top of the auxiliary slide (108), and a top column (117) ring-arranged on the top of the top plate (115) and fixed to the tray (118).

3. The automatic stator press-fitting device according to claim 1, characterized in that: The press-fitting structure (2) further comprises a transition block (203) fixed on the top of the press frame (202), a transition groove (204) provided at the bottom of the transition block (203), a through hole (205) coaxially penetrating the transition block (203) and communicating with the transition groove (204), a pressure sensor (208) fixed on the top of the press frame (202) and located in the transition groove (204), a connecting rod (206) penetrating the through hole (205) in a liftable manner, and a contact block (207) fixed at the bottom of the connecting rod (206) and cooperating with the pressure sensor (208), wherein the diameter of the contact block (207) is greater than the diameter of the through hole (205).

4. The automatic stator press-fitting device according to claim 1, characterized in that: The press-fitting structure (2) further comprises a slot (216) provided at the top of the pressing plate (209), a through slot (217) provided at the bottom of the slot (216) and penetrating the pressing plate (209), a fixing post (219) fixed at the top of the pressing block (213) and penetrating the through slot (217), and a card plate (218) fixed at the top of the fixing post (219), wherein the diameter of the card plate (218) is greater than the diameter of the fixing post (219).

5. The automatic stator press-fitting device according to claim 1, characterized in that: The press-fitting structure (2) further comprises a second guide surface (212) arranged obliquely on the inner side wall of the outer gauge (210).

6. The automatic stator press-fitting device according to claim 2, characterized in that: The bearing structure (1) further comprises a lifting plate (113) which is liftably arranged on the inner side of the bearing frame (101), a first guide surface (123) which is obliquely arranged on the top of the inner gauge (122), and a guide portion (121) which is obliquely arranged on the top of the insertion rod (120), wherein the lifting plate (113) is against the bottom of the top plate (115).

7. The automatic stator press-fitting device according to claim 2, characterized in that: The bearing structure (1) also includes a guide plate (102) fixed at intervals on the top of the bearing frame (101), a first wear-resistant plate (103) fixed in the guide plate (102), a second wear-resistant plate (104) fixed at the bottom of the main slide (105) and abutting against the first wear-resistant plate (103), a third wear-resistant plate (107) fixed at the top of the main slide (105), and a fourth wear-resistant plate (110) fixed at the bottom of the auxiliary slide (108) and abutting against the third wear-resistant plate (107).

8. The automatic press-fitting device for a stator according to claim 1, characterized in that: The transfer structure (3) comprises a first movable plate (301) slidably connected to one side of the bearing structure (1), a transfer frame (303) slidably connected to the top of the first movable plate (301), an angle plate (304) liftably arranged on the side of the transfer frame (303) close to the bearing frame (101), and a clamping assembly fixed on the angle plate (304), wherein the first movable plate (301) is perpendicular to the moving direction of the transfer frame (303), and the clamping assembly is used for clamping the stator that is transferred and pressed.

9. The automatic stator press-fitting device according to claim 8, characterized in that: The clamping assembly comprises a finger cylinder (305) fixed on one side of the angle plate (304), a clamping plate (306) fixed on the finger cylinder (305), a clamping block (309) provided on the opposite side of the clamping plate (306), and an avoidance arc (307) provided on the inner side of the clamping block (309).

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