Automatic pressing device for stator

Abstract

An automatic pressing device for a stator, comprising: a bearing structure (1), wherein the bearing structure (1) comprises a bearing frame (101), an inner gauge (122) fixed to the top of the bearing frame (101), a tray (118) sleeved on the inner gauge (122) in a liftable / lowerable manner, and insertion rods (120) annularly arranged on the top of the bearing frame (101) and passing through the tray (118), and a wire slot of a stator sheet is fitted onto the corresponding insertion rod (120); and a pressing structure (2), wherein the pressing structure (2) comprises a pressing frame (201) arranged above the bearing frame (101), a pressure frame (202) arranged at the bottom of the pressing frame (201) in a liftable / lowerable manner, a pressure plate (209) fixed to the bottom of the pressure frame (202), an outer gauge (210) fixed to the bottom of the pressure plate (209), a pressure block (213) elastically arranged at the bottom of the pressure plate (209) and abutting against the inner side wall of the outer gauge (210), and slots (220) annularly arranged at the bottom of the pressure block (213).

Description

An automatic pressing device for stators Technical Field

[0001] This invention belongs to the field of stator assembly technology, specifically relating to an automatic pressing device for stators. Background Technology

[0002] The stator is the stationary part of the electric motor. It consists of three parts: the stator core, the stator windings, 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 magnetic lines of force within this rotating magnetic field, thereby generating (outputting) current. During manufacturing, stators are typically produced by stamping single stator laminations from silicon steel sheets, which are then glued together to form the stator.

[0003] In the existing stator assembly process, the stator sheets after being coated with adhesive are placed one by one on the stator fixture plate, and then the operator presses them down to complete the layering and bonding of the stator sheets.

[0004] The pressing force cannot be controlled during pressing, resulting in different pressing degrees between adjacent stator lamination layers. This can lead to over-pressing or under-pressing. In addition, manual placement of stator laminations can result in placement errors, easily causing misalignment of the stator lamination slots. Overall pressing efficiency is low, and the pass rate of finished stators cannot be guaranteed. Technical issues

[0005] This invention provides an automatic pressing device for stators, which solves the defects of low pressing efficiency and inability to guarantee the pass rate of finished stators in the prior art due to manual pressing of stator laminations. Technical solutions

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: an automatic pressing device for stators, comprising:

[0007] The load-bearing structure includes a load-bearing frame, an inner gauge fixed to the top of the load-bearing frame, a tray that is vertically and flexibly fitted onto the inner gauge, and an insert rod that is circumferentially arranged around the top of the load-bearing frame and passes through the tray. The wire grooves of the stator laminations are inserted into the insert rods, and the inner gauge is used to limit the inner sidewalls of the stator laminations.

[0008] The press-fitting structure includes a press-fitting frame mounted above a support frame, a press frame that is vertically and flexibly disposed at the bottom of the press-fitting frame, a press plate fixed at the bottom of the press frame, an outer gauge fixed at the bottom of the press plate, a press block that is elastically disposed at the bottom of the press plate and abuts against the inner side wall of the outer gauge, and a slot circumferentially disposed at the bottom of the press block.

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

[0010] A transfer structure is provided on one side of the supporting structure and is used to clamp and transfer the press-fitted stator.

[0011] Optimally, the load-bearing structure further includes a main slide plate slidably connected to the load-bearing frame, a first inclined pin surface obliquely opened on the top of the main slide plate, a secondary slide plate disposed on the top of the main slide plate, a second inclined pin surface obliquely opened on the bottom of the secondary slide plate and cooperating with the first inclined pin surface, a top plate fixed on the top of the secondary slide plate, and a top column circumferentially disposed on the top of the top plate and fixed to the tray.

[0012] Optimally, the press-fit structure further includes a transition block fixed to the top of the press frame, a transition groove formed at the bottom of the transition block, a through hole coaxially passing through the transition block and communicating with the transition groove, a pressure sensor fixed to the top of the press frame and located in the transition groove, a connecting rod that can be raised and lowered through the through hole, and a contact block fixed to the bottom of the connecting rod and cooperating 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 further includes a slot formed on the top of the press plate, a through groove formed at the bottom of the slot and penetrating the press plate, a fixing post fixed on the top of the press block and penetrating the through groove, and a clamping plate fixed on the top of the fixing post, wherein the diameter of the clamping plate is larger than the diameter of the fixing post.

[0014] Optimally, the press-fitting structure further includes a spring groove formed at the bottom of the press plate, a spring disposed in the spring groove and abutting against the top of the press block, and a second guide surface inclinedly disposed on the inner side wall of the outer gauge.

[0015] Optimally, the supporting structure further includes a lifting plate that is vertically and flexibly disposed inside the supporting frame, a first guide surface that is inclinedly disposed on the top of the inner gauge, and a guide portion that is inclinedly disposed on the top of the insert rod, wherein the lifting plate abuts against the bottom of the top plate.

[0016] Optimally, the load-bearing structure further includes a guide plate fixed at intervals on the top of the load-bearing frame, a first wear-resistant plate fixed inside the guide plate, a second wear-resistant plate fixed to the bottom of the main slide plate and abutting against the first wear-resistant plate, a third wear-resistant plate fixed to the top of the main slide plate, and a fourth wear-resistant plate fixed to the bottom of the auxiliary slide plate 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 support structure, a transfer frame slidably connected to the top of the first movable plate, a corner plate that is vertically and flexibly disposed on the side of the transfer frame near the support 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 the stator that has been transferred and press-formed.

[0018] Optimally, the gripping assembly includes a finger cylinder fixed to one side of the corner plate, a clamping plate fixed to the finger cylinder, a clamping block formed on the opposite side of the clamping plate, and an avoidance arc formed on the inner side of the clamping block. Beneficial effects

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

[0020] This invention relates to an automated stator pressing device with a high degree of automation. The supporting structure receives stator laminations transferred by a robotic arm, and the pressing structure sequentially presses the stator laminations placed on the supporting structure. Once the pressing thickness of the stator laminations reaches the design requirements, the transfer structure clamps the pressed finished stator and transfers it to a subsequent conveyor belt for transport to the next assembly station. The entire pressing process requires no manual intervention. Each stator lamination is positioned during both placement and pressing, improving the pressing efficiency of the stator laminations and the pass rate of the finished stator after pressing. Furthermore, it saves on labor input and reduces costs. Attached Figure Description

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

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

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

[0024] Figure 4 is a partial structural schematic diagram of the load-bearing structure of the present invention;

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

[0026] Figure 6 is a schematic diagram of the structure of the present invention after removing the transition block in Figure 5;

[0027] Figure 7 is a partial structural schematic diagram of the present invention as shown in Figure 5;

[0028] Figure 8 is a schematic diagram of the structure at the bottom of Figure 5 of the present invention;

[0029] Figure 9 is a cross-sectional view of the pressure plate and outer gauge of the present invention;

[0030] Figure 10 is a cross-sectional view of the pressure plate and outer gauge of the present invention;

[0031] Figure 11 is a schematic diagram of the transition block of the present invention;

[0032] Figure 12 is a schematic diagram of the transfer structure of the present invention;

[0033] Figure 13 is a partial structural schematic diagram of the transfer structure of the present invention. Embodiments of the present invention

[0034] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0035] Figure 1 shows a schematic diagram of the automatic stator pressing equipment of the present invention. This equipment is typically used to press and bond stator laminations together to form a stator. The equipment includes a support structure 1, a pressing structure 2, and a transfer structure 3. The support structure 1 receives the stator laminations transferred there by the robotic arm. The pressing structure 2 presses the stator laminations placed on the support structure 1 in sequence. When the pressing thickness of the stator laminations reaches the design requirements, the transfer structure 3 clamps the pressed finished stator and transfers it to the subsequent conveyor belt for transport to the subsequent assembly station.

[0036] Figure 2-4 shows a schematic diagram of the supporting structure 1. The supporting structure 1 is used to receive the stator plates transferred there by the robotic arm. The supporting structure 1 includes a support 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, a plug rod 120, a guide part 121, an inner gauge 122, and a first guide surface 123. The support frame 101 is welded from aluminum profiles and is fixed to the assembly table by screws, mainly serving a supporting function.

[0037] The fixed plate 116 is fixed to the top of the support frame 101 by screws. The inner gauge 122 is fixed to the top of the fixed plate 116 and is used to initially position each stator lamination picked up by the robot arm. This prevents the stator lamination from being misplaced, which would affect the subsequent pressing of the stator lamination. It also prevents the stator lamination from being placed crookedly and damaging the machine. (The outer diameter of the inner gauge 122 is equal to the inner diameter of the stator lamination. Therefore, the function of the inner gauge 122 is to position the inner wall of the stator lamination.)

[0038] The first guide surface 123 is inclinedly opened on the top of the inner gauge 122. When placing the stator lamination, it guides the inner sidewall of the stator lamination to ensure that the stator lamination is more easily placed on the inner gauge 122.

[0039] The insertion rod 120 is fixed to the top of the fixing plate 116 and is arranged around the outside of the inner gauge 122. The insertion rod 120 matches the shape of the stator lamination slot. When inserting the stator lamination, the inner sidewall of the stator lamination is inserted into the inner gauge 122, and the slot of the stator lamination is inserted into the insertion rod 120. The guide portion 121 is inclinedly opened at the top of the insertion rod 120 to guide the slot of the stator lamination, ensuring that the stator lamination is more easily inserted into the insertion rod 120.

[0040] The tray 118 is fitted onto the inner guide 122, and a boss 119 is integrally connected to the top of the tray 118. The tray 118 and the boss 119 have grooves that mate with the insertion rod 120, thus avoiding the position of the insertion rod 120. The tray 118 is not fixedly connected to the inner guide 122; the tray 118 can move up and down along the inner guide 122 under the action of the first and second lifting components at the bottom. Each time the robotic arm places a stator lamination on the boss 119, the first lifting component lowers the tray 118 by the thickness of one stator lamination, ensuring that the pressing structure 2 lowers the pressing distance the same each time, thereby ensuring the consistency of the pressing and bonding effect of each layer of stator laminations and avoiding over-pressing or under-pressing.

[0041] 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 lifting component and the second lifting component are connected to the top plate 115 and are used to drive the top plate 115 to move up and down, thereby driving the upper tray 118 to move up and down.

[0042] The first lifting assembly includes a guide plate 102, a first wear-resistant plate 103, a second wear-resistant plate 104, a main slide plate 105, a first inclined pin surface 106, a third wear-resistant plate 107, a secondary slide plate 108, a second inclined pin surface 109, a fourth wear-resistant plate 110, and a push cylinder 111. Each time the robot arm places a stator lamination on the boss 119, the first lifting assembly drives the tray 118 to descend by the thickness of one stator lamination, ensuring that the pressing structure 2 descends and presses the same distance each time, thereby ensuring the consistency of the pressing and bonding effect of each layer of stator laminations and avoiding over-pressing or under-pressing.

[0043] Two guide plates 102 are fixed to the support frame 101 at intervals. A guide groove is formed between the two guide plates 102, which provides linear guidance for the sliding of the main slide plate 105, preventing the main slide plate 105 from deviating during sliding and thus affecting the lifting and lowering movement of the auxiliary slide plate 108. The first wear-resistant plate 103 is fixed to the support frame 101 and located within the guide groove formed by the two guide plates 102.

[0044] The second wear-resistant plate 104 is fixed to the bottom of the main slide plate 105 and rests on the first wear-resistant plate 103. When the cylinder 111 pushes the main slide plate 105 to move, the main slide plate 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 guide plates 102 guide the second wear-resistant plate 104, thereby providing a straight-line guide for the sliding of the main slide plate 105, preventing the main slide plate 105 from deviating during sliding, which would affect the lifting and lowering movement of the auxiliary slide plate 108.

[0045] By setting up a first wear-resistant plate 103 and a second wear-resistant plate 104 that cooperate with each other, the wear of the main slide plate 105 caused by frequent friction can be avoided, thus preventing the accuracy of the lifting distance of the auxiliary slide plate 108 from being affected. The main slide plate 105 is in the shape of a right-angled triangle, and the second wear-resistant plate 104 is fixed on one of the right-angled sides of the main slide plate 105. The inclined surface of the main slide plate 105 is the first inclined pin surface 106.

[0046] The auxiliary slide plate 108 is fixed to the bottom of the top plate 115. The auxiliary slide plate 108 is in the shape of a right triangle. One right-angled side of the auxiliary slide plate 108 is fixed to the bottom of the top plate 115. The inclined surface of the auxiliary slide plate 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 cylinder 111 pushes the main slide plate 105 to move, the main slide plate 105 will push the auxiliary slide plate 108 to move up and down, thereby driving the top plate 115 and the tray 118 above to move up and down.

[0047] To prevent wear and tear at the contact point between the main skateboard 105 and the secondary skateboard 108, a third wear-resistant plate 107 is fixed on the first inclined pin surface 106 of the main skateboard 105, and a fourth wear-resistant plate 110 is fixed on the second inclined pin surface 109 of the secondary skateboard 108.

[0048] By setting up a main slide plate 105 and a secondary slide plate 108 that cooperate with each other, the linear motion of the push cylinder 111 is converted into a lifting motion, thereby avoiding the pressing action of the pressing structure 2. If the lifting cylinder 112 is directly connected to the top plate 115 to drive the top plate 115 to perform lifting motion, then when the pressing structure 2 presses down on the stator laminations, 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. It will also cause the pressing distance to be inconsistent, which will affect the pass rate of the finished stator.

[0049] By setting up a main slide plate 105 and a secondary slide plate 108 that cooperate with each other, the linear motion of the push cylinder 111 is converted into a lifting motion, thereby avoiding the pressing action of the pressing structure 2. The vertical pressure of the pressing structure 2 acts downward on the main slide plate 105 and the secondary slide plate 108, with less impact on the push cylinder 111 on one side. Moreover, the main slide plate 105 contacts the support frame 101, and the bottom of the stator sheet is rigidly supported during pressing, rather than the floating support of the lifting cylinder 112. The rigid support provides a better pressing effect, ensuring that the pressing structure 2 lowers and presses the same distance each time, thereby ensuring the consistency of the pressing and bonding effect of each layer of stator sheet and avoiding over-pressing or under-pressing.

[0050] 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 support frame 101 via 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, not fixedly connected). The lifting cylinder 112 is fixed to the outer side of the support frame 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 move up and down, thereby driving the top plate 115 to move up and down.

[0051] Once the stator lamination thickness reaches the design requirements, the second lifting component assists the first lifting component in lifting the stator. The transfer structure 3 then picks up the finished stator and transfers it to the subsequent conveyor belt for transport to the next assembly station. (Because the stator is usually made up of hundreds of stator laminations stacked and bonded together, it is quite heavy. At this time, the push cylinder 111 is set horizontally. If the push cylinder 111 is used alone to lift the stator, it would be difficult. Moreover, in order to ensure the accuracy of the push cylinder 111, the ejection speed should not be too high. Therefore, the second lifting component assists the first lifting component in lifting the stator.)

[0052] After the stator ejection is completed, the second lifting assembly returns to its original position. At this time, the top plate 115 is still under the control of the first lifting assembly, so as to avoid the pressing action of the pressing structure 2 from affecting the second lifting assembly.

[0053] The press-fitting structure 2 is positioned above the support structure 1 and is used to press-fit the stator laminations placed on the support structure 1 sequentially, as shown in Figures 5-8. 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 pressure 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 slot 216, a through groove 217, a clamping plate 218, a fixing post 219, a slot 220, a first clearance groove 221, and a second clearance groove 222. The press-fitting frame 201 is fixed to the assembly machine platform by screws and is located above the support structure 1.

[0054] The press frame 202 is slidably connected to one side of the press frame 201 via a slide rail and a slider. A pressing cylinder (a commercially available single-acting cylinder) is fixed to the top of the press frame 201. The pressing cylinder drives the press frame 202 to descend, thereby pressing the stator laminations placed on the bearing structure 1 in sequence.

[0055] As shown in Figures 5 and 6, the transition block 203 is fixed to the top of the pressure frame 202. Figure 11 shows 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 at 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 is coaxially arranged with the transition block 203.

[0056] The connecting rod 206 is connected to the piston rod of the pressing 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 is the same each time it is pressed down, thereby ensuring the consistency of the pressing and bonding effect of each layer of stator laminations and avoiding over-pressing or under-pressing.

[0057] 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 pressure frame 202 from falling off. At the same time, the cooperation between the contact block 207 and the pressure sensor 208 can also ensure that the pressure is the same each time it is pressed down, avoiding over-pressing or under-pressing.

[0058] As shown in Figures 7 and 8, the pressure plate 209 is fixed to the bottom of the pressure frame 202 and rises and falls synchronously with the pressure frame 202. The outer gauge 210 is fixed to the bottom of the pressure plate 209, and the groove 211 is formed 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 lamination. During pressing, each stator lamination is repositioned to avoid deviation in the placement of the stator lamination, which would affect the pressing of subsequent stator laminations. It also prevents the stator laminations from being placed crookedly, which could damage the machine (the inner diameter of the outer gauge 210 is equal to the outer diameter of the stator lamination, so the function of the outer gauge 210 is to position the outer wall of the stator lamination).

[0059] The second guide surface 212 is inclinedly opened on the inner side of the bottom of the outer gauge 210. When the stator laminations are pressed down, it guides the outer wall of the stator laminations to ensure that the stator laminations can enter the outer gauge 210 more easily.

[0060] The pressure block 213 is elastically positioned at the bottom of the pressure plate 209, and its outer side wall is in contact with the inner side wall of the outer gauge 210. When the pressure block 213 elastically presses down on the stator laminations, the outer gauge 210 guides the movement of the pressure block 213, improving the stator lamination pressing effect. As shown in Figures 9 and 10, the thickness of the pressure block 213 is less than the thickness of the outer gauge 210, ensuring that the outer gauge 210 simultaneously satisfies the elastic guidance of the pressure block 213 and the positioning of the outer side wall of the stator laminations.

[0061] The slot 220 is arranged around the bottom of the pressure block 213 and corresponds one-to-one with the position of the insertion rod 120 of the bearing structure 1. When the pressure block 213 moves downward to press the stator lamination, the insertion rod 120 will be inserted into the slot 220. By relying on the cooperation of the insertion rod 120 and the slot 220, the movement of the pressure block 213 can be guided, and the pressing effect of the stator lamination can be improved.

[0062] As shown in Figure 7-10, the slot 216 is formed on the top of the pressure plate 209, and the through slot 217 is formed at the bottom of the slot 216 and passes through the pressure plate 209. The diameter of the slot 216 is larger than the diameter of the through slot 217. Therefore, the connection between the slot 216 and the through slot 217 forms a shoulder structure, which is used to hold the card plate 218.

[0063] The fixing post 219 is fixed to the top of the pressure block 213 and passes through the through groove 217. The clamping plate 218 is fixed to the top of the fixing post 219 and placed in the clamping groove 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 rests against the lower surface of the clamping groove 216. At this time, there is a gap between the pressure block 213 and the pressure plate 209. Since the clamping plate 218 is clamped at the shoulder between the clamping groove 216 and the through groove 217, the pressure block 213 will not fall off. During pressing, the pressure plate 209 moves downward to press against the uppermost stator lamination. At this time, the pressure block 213 rises to fit against the pressure plate 209.

[0064] A spring groove 214 is formed at the bottom of the pressure plate 209, and a spring 215 is disposed in the spring groove 214 and abuts against the upper surface of the pressure block 213. Therefore, when not pressed, the clamping plate 218 abuts against the lower surface of the clamping groove 216, and at this time there is a gap between the pressure block 213 and the pressure plate 209. Since the clamping plate 218 is clamped at the shoulder between the clamping groove 216 and the through groove 217, the pressure block 213 will not fall off, and the spring 215 is in an open state. When pressing, the pressure plate 209 moves downward to press against the uppermost stator lamination. At this time, the pressure block 213 rises to fit against the pressure plate 209. At this time, the spring 215 is in a compressed state. The spring 215 is used to achieve the elastic pressing of the pressure block 213, avoiding rigid pressing that could damage the stator lamination (the pressing of the stator lamination is a rigid support at the bottom and an elastic pressing at the top).

[0065] The spring 215 here not only serves to provide elastic pressing and prevent damage to the stator sheets from rigid pressing, but its main function is material discharge: because during pressing, the pressure block 213 will press and contact the uppermost stator sheet, and when the pressure block 213 returns to its original position after pressing, it may lift the uppermost stator sheet again. Therefore, the return movement of the spring 215 drives the pressure block 213 to return to its original position, assisting in the discharge of the uppermost stator sheet.

[0066] The first clearance groove 221 passes through the pressure block 213, and the second clearance groove 222 passes through the pressure plate 209 and is coaxially engaged with the first clearance groove 221. When pressing the stator laminations, the position of the inner gauge 122 is avoided, thus preventing interference.

[0067] Once the stator lamination thickness reaches the design requirements, the transfer structure 3 clamps the finished stator and transfers it to the subsequent conveyor belt for transport to the next assembly station. As shown in Figure 12, the transfer structure 3 includes a first moving plate 301, a second moving plate 302, a transfer frame 303, a corner plate 304, and a clamping assembly. The first moving plate 301 is slidably connected to the top of the assembly machine via a slide rail and a slider, and the second moving plate 302 is slidably connected to the top of the first moving plate 301 via a slide rail and a slider (both the first moving plate 301 and the second moving plate 302 are driven by linear cylinders, and the moving directions of the first moving plate 301 and the second moving plate 302 are perpendicular).

[0068] The transfer frame 303 is fixed to the top of the second moving plate 302. The corner plate 304 is slidably connected to the side of the transfer frame 303 near the support frame 101 via a slide rail and a slider. A lifting cylinder connected to the corner plate 304 is fixed on the transfer frame 303. The gripping assembly is fixed on the corner plate 304 and is used to grip the pressed finished stator and transfer it to the subsequent conveyor belt for transport to the subsequent assembly station. As shown in Figure 13, the gripping assembly includes a finger cylinder 305, a clamping plate 306, an avoidance arc 307, a fixing groove 308, and a clamping block 309.

[0069] The finger cylinder 305 is fixed to the angle plate 304. There are two clamping plates 306, each fixed to the finger cylinder 305. The finger cylinder 305 drives the clamping plate 306 to move inward, thereby completing the clamping operation of the finished stator. The clamping block 309 is fixed to the inside of the clamping plate 306. When the clamping plate 306 moves inward, the clamping block 309 clamps the finished stator on the tray 118.

[0070] The clamping block 309 is made of rubber, which can prevent scratching the side wall of the stator when clamping it. The inner side of the clamping block 309 is provided with a relief arc 307. Since the finished stator is made of multiple stator sheets stacked and bonded together, and is cylindrical, the relief arc 307 avoids the structure in the diameter direction of the finished stator, making it easier for the clamping block 309 to hold it.

[0071] The working principle of the automatic stator pressing equipment of the present invention is as follows:

[0072] A glue-dipping tray is provided on one side of the pressing equipment. The stator sheets to be pressed are first picked up by the robot and placed in the glue-dipping tray. After the lower surface of the stator sheets is coated with glue, the robot picks them up and places them on the tray 118 of the bearing structure 1.

[0073] The support structure 1 is used to receive the stator laminations transferred here by the robot arm. The pressing structure 2 presses the stator laminations placed on the support structure 1 in sequence. When the pressing thickness of the stator laminations reaches the design requirements, the transfer structure 3 clamps the pressed finished stator and transfers it to the subsequent conveyor belt for transport to the subsequent assembly station.

[0074] The stator laminations are positioned during placement by the cooperation of the insert rod 120 and the inner gauge 122; the stator laminations are positioned during pressing by the cooperation of the slot 220 and the outer gauge 210. The elastically set pressure block 213 avoids damage to the stator laminations during rigid pressing, and also prevents the top stator laminations from being lifted up after pressing.

[0075] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic pressing device for stators, wherein the stator is formed by stacking and bonding stator laminations, characterized in that, It includes: The load-bearing structure includes a load-bearing frame, an inner gauge fixed to the top of the load-bearing frame, a tray that is vertically and flexibly fitted onto the inner gauge, and an insert rod that is circumferentially arranged around the top of the load-bearing frame and passes through the tray. The wire grooves of the stator laminations are inserted into the insert rods, and the inner gauge is used to limit the inner sidewalls of the stator laminations. The press-fitting structure includes a press-fitting frame mounted above a support frame, a press frame that is vertically and flexibly disposed at the bottom of the press-fitting frame, a press plate fixed at the bottom of the press frame, an outer gauge fixed at the bottom of the press plate, a press block that is elastically disposed at the bottom of the press plate and abuts against the inner side wall of the outer gauge, and a slot circumferentially disposed at the bottom of the press block. When the pressure frame descends, the pressure block presses against the upper surface of the stator lamination, the slot is used to limit the insertion rod, and the outer gauge is used to limit the outer side wall of the stator lamination; A transfer structure is provided on one side of the supporting structure and is used to clamp and transfer the press-fitted stator.

2. The automatic pressing equipment for stators according to claim 1, characterized in that: The load-bearing structure also includes a main slide plate slidably connected to the load-bearing frame, a first inclined pin surface obliquely opened on the top of the main slide plate, a secondary slide plate disposed on the top of the main slide plate, a second inclined pin surface obliquely opened on the bottom of the secondary slide plate and cooperating with the first inclined pin surface, a top plate fixed on the top of the secondary slide plate, and a top column circumferentially disposed on the top of the top plate and fixed to the tray.

3. The automatic pressing equipment for stators according to claim 1, characterized in that: The press-fit structure also includes a transition block fixed to the top of the press frame, a transition groove formed at the bottom of the transition block, a through hole coaxially passing through the transition block and communicating with the transition groove, a pressure sensor fixed to the top of the press frame and located in the transition groove, a connecting rod that can be raised and lowered through the through hole, and a contact block fixed to the bottom of the connecting rod and cooperating with the pressure sensor, wherein the diameter of the contact block is larger than the diameter of the through hole.

4. The automatic pressing equipment for stators according to claim 1, characterized in that: The press-fit structure also includes a slot on the top of the press plate, a through slot at the bottom of the slot and penetrating the press plate, a fixing post fixed on the top of the press block and penetrating the through slot, and a clamping plate fixed on the top of the fixing post, wherein the diameter of the clamping plate is larger than the diameter of the fixing post.

5. The automatic pressing equipment for stators according to claim 1, characterized in that: The press-fitting structure also includes a spring groove at the bottom of the press plate, a spring disposed in the spring groove and abutting against the top of the press block, and a second guide surface inclinedly disposed on the inner side wall of the outer gauge.

6. The automatic pressing equipment for stators according to claim 2, characterized in that: The supporting structure also includes a lifting plate that is vertically mounted inside the support frame, a first guide surface that is inclinedly mounted on the top of the inner gauge, and a guide portion that is inclinedly mounted on the top of the insert rod, with the lifting plate abutting against the bottom of the top plate.

7. An automatic pressing device for stators according to claim 2, characterized in that: The load-bearing structure also includes a guide plate fixed at intervals on the top of the load-bearing frame, a first wear-resistant plate fixed inside the guide plate, a second wear-resistant plate fixed to the bottom of the main slide plate and abutting against the first wear-resistant plate, a third wear-resistant plate fixed to the top of the main slide plate, and a fourth wear-resistant plate fixed to the bottom of the auxiliary slide plate and abutting against the third wear-resistant plate.

8. The automatic pressing equipment for stators according to claim 1, characterized in that: The transfer structure includes a first movable plate slidably connected to one side of the support structure, a transfer frame slidably connected to the top of the first movable plate, a corner plate that is vertically and flexibly disposed on the side of the transfer frame near the support 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 the stator that has been transferred and press-formed.

9. An automatic pressing device for stators according to claim 8, characterized in that: The gripping assembly includes a finger cylinder fixed to one side of the corner plate, a clamping plate fixed to the finger cylinder, a clamping block opened on the opposite side of the clamping plate, and an avoidance arc opened on the inner side of the clamping block.

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