Motor stator stamping die with multi-stage gear swing mechanism

Abstract

The invention discloses a motor stator stamping die with a multi-stage gear swing mechanism, relates to the technical field of motor stamping manufacturing, and has the advantage that the situation that a female die and a male die are damaged when the female die and the male die are assembled after the female die rotates is reduced. According to the technical scheme, the die is characterized by comprising a female die body matched with the appearance of a product and a male die body which is right opposite to the female die body and used in cooperation with the female die body, N grooves and N protrusions which are oppositely distributed are arranged on the female die body and the male die body respectively, and the grooves and the protrusions are distributed corresponding to protruding teeth of the appearance of the product; the rotating mechanism is used for driving the female die to rotate; the rotating mechanism is used for driving the female die to rotate at an angle of 360 degrees / N each time; the tooth breakage prevention mechanism comprises an upper fixing plate used for fixing the male die, and after the rotating mechanism drives the female die to stop rotating, if the groove and the protrusion are not aligned, the tooth breakage prevention mechanism drives the upper fixing plate to move in the direction away from the female die.

Description

Technical Field

[0001] This invention relates to the field of motor stamping manufacturing technology, specifically to a motor stator stamping die with a multi-stage gear rotation mechanism. Background Technology

[0002] Stamping is a processing and forming method that uses a press and dies to apply external force to sheet metal, strip, tube and profile, causing plastic deformation or separation, thereby obtaining a workpiece of the required shape and size.

[0003] The motor stator is an important component of the motor, and stamping dies are mainly used to stamp the stator.

[0004] like Figure 13 As shown, this is the structure of the stator after stamping. The stator has three protruding teeth arranged in a circumferential array on the outer ring. After stamping the stator with protruding teeth on the outer ring, the die needs to be rotated multiple times, and stamped again after each rotation to eliminate the thickness difference of the stator. However, if the die does not rotate in place, the punch and die will close, causing the die and the die wall on the punch to collide, which will lead to damage to the die.

[0005] Therefore, the applicant has developed a new technical solution in the actual production process to solve the above-mentioned technical problems. Summary of the Invention

[0006] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a motor stator stamping die with a multi-stage gear rotation mechanism, which has the advantage of reducing the occurrence of damage to the die and punch during die closing after the die has rotated.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a motor stator stamping die with a multi-stage gear rotation mechanism, including a die cavity that matches the product shape and a punch that is placed opposite the die cavity and matches the die cavity. The die and the punch are respectively provided with N oppositely distributed grooves and protrusions, and each groove and protrusion corresponds to the convex tooth distribution of the product shape. It also includes an anti-tooth-breakage mechanism and a rotating mechanism for driving the die to rotate, wherein the rotating mechanism is used to drive the die to rotate by an angle of 360° / N each time; The anti-breakage mechanism includes an upper fixing plate for fixing the punch. After the rotating mechanism drives the die to stop rotating, if the groove and the protrusion are not aligned, the anti-breakage mechanism drives the upper fixing plate to move away from the die.

[0008] By adopting the above technical solution, the product to be processed is placed in the groove, and the punch and die close together, so that the protrusion on the punch and the groove on the die fit together, thereby stamping out the outer ring protrusion of the stator. After the stator protrusion is stamped, in order to eliminate the thickness difference of the stator, the rotating mechanism drives the die to rotate, and the die rotates by an angle of 360° / N. Then the punch and die close together again. If the groove and the protrusion are not aligned, the anti-breakage mechanism drives the upper fixed plate to move away from the die. Thus, when the punch and die close together, the upper fixed plate drives the punch to move away from the die, reducing the contact between the protrusion and the groove, thereby reducing the occurrence of damage to the die and punch when they close together after the die rotates.

[0009] Preferably, the rotating mechanism includes a positioning sleeve and a rotating sleeve for fixing the die. The rotating sleeve is rotatably connected to the positioning sleeve through a bearing assembly. The rotating sleeve is equipped with a driven gear and a power component for driving the driven gear to rotate.

[0010] Preferably, the power component includes a drive gear that meshes with the driven gear. The drive gears are provided in a plurality of positions and mesh with each other. One of the drive gears meshes with the driven gear, and the drive gear farthest from the driven gear is driven to rotate by a servo motor.

[0011] Preferably, the outer wall of the rotating sleeve located inside the positioning sleeve is provided with several mounting walls with decreasing diameters. The diameter of each mounting wall gradually decreases towards the driven gear. The bearing assembly includes a radial bearing located between each mounting wall and the positioning sleeve, and a planar bearing between two adjacent mounting walls.

[0012] Preferably, the anti-breakage mechanism further includes an upper mold base and a fixed plate base fixed to the lower end face of the upper mold base. The upper end of the upper fixed plate slides up and down and is connected to the fixed plate base. The upper end face of the rotating sleeve is provided with a plurality of positioning holes. The fixed plate base is provided with positioning pins distributed corresponding to the positioning holes. When the groove and the protrusion are opposite to each other, the rotating mechanism drives the die to rotate by an angle of 360° / N. Each positioning pin corresponds to each positioning hole. When the die and the punch are closed, the lower end of the positioning pin is inserted into the positioning hole. Each of the positioning pins slides up and down and is connected to the upper mold base. The upper mold base is provided with a driving component that drives the upper fixed plate to move up and down. When the positioning pins move upward, they cooperate with the driving component to drive the upper fixed plate to move upward.

[0013] Preferably, the driving component includes a retraction safety plate that slides along the length of the upper mold base on the side of the upper mold base facing the fixed plate base. The upper fixed plate is provided with a plurality of wave-shaped grooves I, and the retraction safety plate is provided with wave-shaped grooves II opposite to the wave-shaped grooves I. The upper mold base is provided with a tensioning component that presses the upper fixed plate against the retraction safety plate. When some of the positioning pins move upward, they push the retractable safety plate to move horizontally, so that the crests and troughs of the wave grooves 2 and 1 are opposite each other, and the tensioning member pulls the upper fixed plate into the fixed plate base.

[0014] Preferably, the tensioning member includes a plurality of mounting holes formed on the upper mold base, the bottom of the mounting holes being threaded with fastening screws, the fastening screws passing through the upper mold base and being threadedly connected to the upper fixing plate, and the fastening screws and the bottom of the mounting holes being provided with a first compression spring.

[0015] Preferably, a cone is coaxially fixed on the upper end face of the positioning pin of the drive component, and the upper mold base is equipped with a second compression spring that moves the lower end of the positioning pin out of the lower end face of the punch. An inclined surface is provided on one side of the retraction safety plate. When the lower end of the positioning pin moves out of the lower end face of the punch, the inclined surface abuts against the inclined surface of each cone. The upper mold base is equipped with a clamping component that presses the inclined surface against the cone.

[0016] Preferably, the outer wall of the upper fixing plate is provided with a plurality of protrusions in the circumferential direction, the base of the fixing plate is provided with a guide sleeve for the protrusions to move up and down, and a ball bearing assembly is provided between the guide sleeve and the protrusions.

[0017] Preferably, the clamping component includes a push rod disposed on the side of the retraction safety plate away from the cone, and a striking rod coaxially connected to one side of the push rod via a rectangular spring, with one end of the striking rod extending out of the upper mold base.

[0018] The beneficial effects of this invention are as follows: the product to be processed is placed in the groove, the punch and die close together, so that the protrusion on the punch and the groove on the die fit together, thereby stamping out the outer ring protrusion of the stator. After the stator protrusion is stamped, in order to eliminate the thickness difference of the stator, the rotating mechanism drives the die to rotate, and the die rotates by an angle of 360° / N. Then the punch and die close together again. If the groove and the protrusion are not aligned, the anti-breakage mechanism drives the upper fixing plate to move away from the die. Thus, when the punch and die close together, the upper fixing plate drives the punch to move away from the die, reducing the contact between the protrusion and the groove, thereby reducing the occurrence of damage to the die and punch when they close together after the die rotates. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the structure of this embodiment; Figure 2 This is a schematic diagram illustrating the structure of the lower mold base in this embodiment; Figure 3 This is a schematic diagram illustrating the structure of the first compression spring in this embodiment; Figure 4 This is a structural schematic diagram illustrating the retraction safety plate in this embodiment; Figure 5 This is a schematic diagram illustrating the meshing of the driving gear and the driven gear in this embodiment; Figure 6 This is a schematic diagram illustrating the structure of the punch in this embodiment; Figure 7 This is a schematic diagram illustrating the structure of the die in this embodiment; Figure 8 This is a schematic diagram illustrating the structure of the compression bar in this embodiment; Figure 9 This is a schematic diagram illustrating the structure of the unloading base in this embodiment; Figure 10 This is a schematic diagram illustrating the structure of the protrusion in this embodiment; Figure 11 This is a schematic diagram illustrating the structure of the ball bearing in this embodiment; Figure 12 This is a schematic diagram illustrating the structure of the mounting plate in this embodiment; Figure 13 This is a schematic diagram of the structure of an existing motor stator.

[0021] Explanation of reference numerals in the attached figures: In the diagram: 1. Upper mold base; 11. Punch; 111. Protrusion; 12. Upper fixing plate; 121. Thrust; 122. Guide sleeve; 123. Mounting plate; 124. Ball bearing; 13. Fixing plate base; 131. Locating pin; 132. Moving hole; 133. Adjusting screw; 134. Adjusting spring; 135. Cone; 136. Cylinder; 137. Mounting plate; 138. Locating screw; 139. Second compression spring; 14. Retractable safety plate; 141. Wave-shaped groove one; 142. Wave-shaped groove two; 143. Inclined surface; 144. Push rod; 145. Rectangular spring; 146. Striking rod; 15. Mounting hole; 151. Fastening screw; 152. First compression spring; 16. Pressure rod; 17. Feeding rod; 171. Third compression spring; 18. Unloading base; 181. Through hole; 182. Unloading plate; 183. Pull rod; 184. Extrusion hole; 1841. Extrusion column; 185. Adjusting screw; 186. Fourth compression spring; 187. Guide cylinder; 2. Lower die base; 21. Die cavity; 211. Groove; 22. Positioning sleeve; 221. Rotating sleeve; 2211. Positioning hole; 2212. Positioning cylinder; 222. Driven gear; 223. Embedded groove; 224. Locking screw; 225. Fixed Positioning post; 226, Insertion slot; 227, Placement slot; 228, Step surface one; 229, Mounting wall; 2291, Step surface two; 23, Radial bearing; 231, Surface bearing; 24, Drive gear; 241, Servo motor; 242, Connecting slot; 243, Reducer; 244, Drive gear; 25, Locking ring base; 251, Locking strip hole; 3, Stator; 31, Convex tooth; 32, Riveting point. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] A stamping die for a motor stator with a multi-stage gear rotation mechanism, such as... Figure 1-7 The stator 3 includes an upper mold base 1 and a lower mold base 2, a concave mold 21 that mates with the outer shape of the stator 3, and a convex mold 11 placed opposite the concave mold 21 and used in conjunction with the concave mold 21. The concave mold 21 and the convex mold 11 are respectively provided with N relatively distributed grooves 211 and protrusions 111, each groove 211 and protrusion 111 corresponding to the convex teeth 31 of the stator 3's outer shape. In this application, the outer ring of the stator 3 has three evenly distributed convex teeth 31 (e.g., ...). Figure 13 (N=3), therefore there are three grooves 211 and three protrusions 111.

[0024] like Figure 1-7 It also includes an anti-tooth-breakage mechanism and a rotating mechanism for driving the die 21 to rotate. The rotating mechanism is used to drive the die 21 to rotate by an angle of 360° / N each time. When N=3, the die 21 rotates by an angle of 120° each time.

[0025] like Figure 1-7 The anti-tooth-breakage mechanism includes an upper fixing plate 12 for fixing the punch 11. After the rotating mechanism drives the die 21 to stop rotating, if the groove 211 and the protrusion 111 are not aligned, the anti-tooth-breakage mechanism drives the upper fixing plate 12 to move away from the die 21.

[0026] like Figure 1-7 The product to be processed is placed in the groove 211. The upper mold base 1 fixes the punch 11, and the lower mold base 2 fixes the die 21. Under the action of a cylinder or other power source, the upper mold base 1 drives the punch 11 to move to the die 21 on the lower mold base 2. The punch 11 and the die 21 close, so that the protrusion 111 on the punch 11 and the groove 211 on the die 21 cooperate, thereby stamping out the outer ring teeth 31 of the stator 3. After the stamping of the teeth 31 of the stator 3 is completed, in order to eliminate the thickness difference of the stator 3, the rotating mechanism drives the die 21 to rotate. Furthermore, the cavity die 21 rotates at an angle of 360° / N. Subsequently, the punch 11 and the cavity die 21 close the mold again. If the groove 211 and the protrusion 111 are not aligned, the anti-breakage mechanism drives the upper fixing plate 12 to move away from the cavity die 21. As a result, when the punch 11 and the cavity die 21 close the mold, the upper fixing plate 12 drives the punch 11 to move away from the cavity die 21, reducing the contact between the protrusion 111 and the groove 211. This reduces the occurrence of damage to the cavity die 21 and the punch 11 when the mold is closed after the cavity die 21 rotates.

[0027] like Figure 1-7 The rotating mechanism includes a positioning sleeve 22 and a rotating sleeve 221 for fixing the die 21. Both the positioning sleeve 22 and the rotating sleeve 221 are annularly distributed sleeves, meaning they are open at both the top and bottom. The rotating sleeve 221 is rotatably connected to the positioning sleeve 22 via a bearing assembly. Both the top and bottom ends of the rotating sleeve 221 extend beyond the top and bottom ends of the positioning sleeve 22. The upper end of the rotating sleeve 221 extends beyond the upper end of the positioning sleeve 22, and at the outer wall of the extended end, it extends further towards the upper surface of the positioning sleeve 22, so that the upper surface of the positioning sleeve 22 supports the rotating sleeve 221. The lower end of the rotating sleeve 221... The lower end of the positioning sleeve 22 extends out of the end, and the driven gear 222 is coaxially fixedly installed at the extended end. The driven gear 222 has a hole in the center. The specific connection method is as follows: the wheel surface of the driven gear 222 is coaxially provided with an embedding groove 223 for the lower outer wall of the rotating sleeve 221 to be embedded. The wheel surface of the driven gear 222 away from the embedding groove 223 is provided with a number of locking screws 224 for mounting the driven gear 222 at the lower end of the rotating sleeve 221. The lower end face of the rotating sleeve 221 is provided with a number of positioning pins 225 that are inserted into the bottom of the embedding groove 223.

[0028] like Figure 1-7 The rotating sleeve 221, the positioning sleeve 22, and the rotating mechanism are all located on the lower mold base 2. The lower mold base 2 has an insertion groove 226 for the positioning sleeve 22 to be inserted, and the lower mold base 2 has a placement groove 227 below the insertion groove 226. The lower end of the placement groove 227 extends out of the lower end face of the lower mold base 2. The positioning sleeve 22 is fixed in the insertion groove 226. The driven gear 222 is located in the placement groove 227. The upper end face of the positioning sleeve 22 is flush with the upper end face of the lower mold base 2. The inner wall of the positioning sleeve 22 has two stepped surfaces 228. The outer wall of the rotating sleeve 221 located inside the positioning sleeve 22 has two mounting walls 229 with decreasing diameters. The diameter of each mounting wall 229 gradually decreases towards the driven gear 222. The two mounting walls 229 also form two stepped surfaces 2291.

[0029] like Figure 2 The bearing assembly includes radial bearings 23 located between each mounting wall 229 and the positioning sleeve 22, and planar bearings 231 between two adjacent mounting walls 229. The lower end of the radial bearing 23 is disposed on the horizontal surface of the two stepped surfaces 228 of the positioning sleeve 22. At this time, the outer ring and inner ring of the radial bearing 23 abut against the inner wall of the positioning sleeve 22 and the mounting wall 229 of the rotating sleeve 221, respectively. There is a gap between the uppermost radial bearing 23 and the uppermost horizontal surface of the stepped surface 2291. The planar bearing 231 is located between the inner ring of the uppermost radial bearing 23 and the mounting wall 229 closest to the driven gear 222. At this time, the planar bearing 231 and multiple radial bearings 23 together support the rotating sleeve 221, so that the rotating sleeve 221 rotates within the positioning sleeve 22. In addition, the planar bearing 231 is also disposed between the lower outer wall of the rotating sleeve 221 extending from the positioning sleeve 22 and the lower mold base 2.

[0030] like Figure 1-7 The rotating sleeve 221 is equipped with a power component that drives the driven gear 222 to rotate. The power component includes a driving gear 24 that meshes with the driven gear 222. Several driving gears 24 are provided, arranged in a row and meshing with each other. The outermost driving gear 24 meshes with the driven gear 222, and the driving gear 24 farthest from the driven gear 222 is driven to rotate by a servo motor 241. At this time, the lower mold base 2 has horizontally distributed connecting grooves 242 that communicate with the placement groove 227. Each driving gear 24 is rotatably connected to the groove wall of the connecting groove 242 through a vertical rotating shaft. One end of the driving gear 24 farthest from the driven gear 222 is located on the outer wall of the lower mold base 2 through the connecting groove 242, which facilitates the subsequent driving of the driving gear 24.

[0031] like Figure 1-7At this time, the servo motor 241 is fixed on the side wall of the lower mold base 2. The output shaft of the servo motor 241 is connected to the reducer 243. The output shaft of the reducer 243 is coaxially fixed to the drive gear 244. The drive gear 244 meshes with the driving gear 24 located outside the lower mold base 2. The servo motor 241 drives each driving gear 24 to rotate, thereby transmitting the rotational power to the driven gear 222. The driving gear 24 drives the driven gear 222 to rotate, reducing the positional error of the rotating sleeve 221 during rotation, so that the rotating sleeve 221 can rotate stably to the required position, further reducing the collision between the protrusion 111 and the groove 211 during mold closing, and reducing the damage to the die 21 and the punch 11.

[0032] like Figure 1-7 and Figure 9 The anti-tooth-breaking mechanism also includes a fixed plate base 13 fixed to the lower end face of the upper mold base 1. The upper end of the upper fixed plate 12 slides up and down and is connected to the fixed plate base 13. The fixed plate base 13 can be provided with a sliding groove for the upper fixed plate 12 to slide into. The upper and lower ends of the sliding groove extend through the upper and lower ends of the fixed plate base 13. The upper end face of the rotating sleeve 221 is provided with a plurality of positioning holes 2211. The fixed plate base 13 is provided with positioning pins 131 corresponding to the positioning holes 2211. When the groove 211 and the protrusion 111 are opposite to each other... When the rotating mechanism drives the die 21 to rotate by 360° / N, each positioning pin 131 corresponds to each positioning hole 2211. During the process of the die 21 and the punch 11 closing, the lower end of the positioning pin 131 is inserted into the positioning hole 2211. Alternatively, a positioning cylinder 2212 can be installed in the positioning hole 2211 by connecting screws. The connecting screws are installed at the bottom of the positioning cylinder 2212. The positioning cylinder 2212 is coaxially distributed with the positioning hole 2211, and the positioning cylinder 2212 is for the positioning pin 131 to be inserted.

[0033] like Figure 1-7 and Figure 9Each positioning pin 131 slides up and down and is connected to the upper mold base 1. The upper mold base 1 is provided with a driving component that drives the upper fixed plate 12 to move up and down. Six positioning pins 131 are evenly arranged around the center of the punch 11. When two positioning pins 131 move upward, they cooperate with the driving component to drive the upper fixed plate 12 to move upward. The connection method between the four non-cooperative locating pins 131 and the upper mold base 1 is as follows: The upper mold base 1 is provided with a moving hole 132 for the locating pins 131 to move up and down. An adjusting screw 133 is threaded into the moving hole 132. The adjusting screw 133 is located directly above the locating pin 131. An adjusting spring 134 is provided between the adjusting screw 133 and the upper end face of the locating pin 131 to move the lower end of the locating pin 131 out of the lower end face of the punch 11. When the adjusting spring 134 is in its natural state, the lower end face of the locating pin 131 moves out of the lower end face of the punch 11. When the protrusion 111 and the groove 211 are misaligned, the lower end of the locating pin 131 is abutted by the upper end face of the rotating sleeve 221, thereby causing the locating pin 131 to move towards the fixed plate base 13, and the adjusting spring 134 is compressed.

[0034] like Figure 1-7 and Figure 9 The driving component includes a retraction safety plate 14 that slides along the length of the upper mold base 1 and is connected to the side of the upper mold base 1 facing the fixed plate base 13. That is, the retraction safety plate 14 moves horizontally back and forth. At this time, the upper mold base 1 is provided with a long strip groove (not shown in the figure) for the retraction safety plate 14 to move horizontally back and forth. The upper end face of the upper fixed plate 12 is provided with several wavy grooves 141, and the lower end face of the retraction safety plate 14 is provided with wavy grooves 142 opposite to the wavy grooves 141. The upper mold base 1 is provided with a tensioning component that presses the upper fixed plate 12 against the retraction safety plate 14.

[0035] like Figure 1-7 and Figure 9 When the two positioning pins 131 move upward, the cones 135 on the two positioning pins 131 abut against the inclined surface 143, thereby pushing the retracting safety plate 14 to move horizontally, so that the crests and troughs of the wave-shaped groove 142 and the wave-shaped groove 141 are opposite each other. At this time, the crests of the wave-shaped groove 142 and the wave-shaped groove 141 both refer to the highest positions of the upward fluctuation of the wave-shaped groove 142 and the wave-shaped groove 141. The tensioning member pulls the upper fixed plate 12 into the fixed plate base 13. At this time, the crests of the wave-shaped groove 142 and the wave-shaped groove 141 enter the trough, which facilitates the movement of the upper fixed plate 12 away from the die 21.

[0036] like Figure 1-7The tensioning component includes several mounting holes 15 formed on the upper mold base 1. The bottom of the mounting holes 15 is threaded with fastening screws 151. The fastening screws 151 pass through the upper mold base 1 and are threadedly connected to the upper fixing plate 12. At this time, each fastening screw 151 is distributed around the periphery of the outer wall of the retractable safety plate 14. The fastening screws 151 and the bottom of the mounting holes 15 are provided with a first compression spring 152. At this time, one end of the first compression spring 152 abuts against the nut of the fastening screw 151, and the other end abuts against the bottom of the mounting hole 15. The first compression spring 152 is sleeved on the outer wall of the fastening screw 151.

[0037] like Figure 1-7 A cone 135 is coaxially fixed to the upper end face of the positioning pin 131 of the drive component. A cylinder 136 is coaxially fixed to the upper end face of the cone 135. The diameter of the cylinder 136 is the same as the diameter of the smaller taper end of the cone 135. A mounting plate 137 with a diameter larger than the cylinder 136 is coaxially fixed to the upper end face of the cylinder 136. A positioning screw 138 is internally threaded into the moving hole 132 of the mounting plate 137. The positioning screw 138 is located above the mounting plate 137, and a second compression spring 139 is provided between the positioning screw 138 and the mounting plate 137. When the spring 139 is in its natural state, the lower end of the positioning pin 131 moves out of the lower end face of the punch 11. The retraction safety plate 14 has an inclined surface 143 on one side. When the lower end of the positioning pin 131 moves out of the lower end face of the punch 11, the inclined surface 143 abuts against the inclined surface of each cone 135. The upper mold base 1 is equipped with a clamping member that presses the inclined surface 143 against the cone 135. The retraction safety plate 14 has a vertically upward extending wall on the side with a higher height of the inclined surface 143. This wall abuts against the outer wall of the cylinder 136. At this time, the wall restricts the position of the retraction safety plate 14.

[0038] like Figure 10-12 The upper fixed plate 12 has several protrusions 121 circumferentially arranged on its outer wall. The fixed plate base 13 has a guide sleeve 122 for the protrusions 121 to move up and down. A ball bearing 124 assembly is provided between the guide sleeve 122 and the protrusions 121. The ball bearing 124 assembly makes the friction between the guide sleeve 122 and the protrusions 121 into rolling friction. The ball bearing 124 assembly includes an arc-shaped mounting plate 123 located between the guide sleeve 122 and the protrusions 121. Several balls bearing 124 are embedded at intervals on the surface of the mounting plate 123. Each ball bearing 124 can roll in the mounting plate 123. The two ends of each ball bearing 124 extend out of the mounting plate 123 and face the guide sleeve 122 and the protrusions 121. At this time, the setting of the ball bearing 124 assembly makes the protrusions 121 move vertically in the guide sleeve 122, reducing the occurrence of the tensioning member pulling the upper fixed plate 12 upward during the upward movement.

[0039] like Figure 1-7The clamping component includes a push rod 144 located on the side of the retracting safety plate 14 away from the cone 135. The upper mold base 1 has a slot for the push rod 144 to reciprocate. A striking rod 146 is coaxially connected to one side of the push rod 144 via a rectangular spring 145. One end of the striking rod 146 extends out of the upper mold base 1 and also reciprocates within the upper mold base 1 along with the retracting safety plate 14. The purpose of this design is to use the rectangular spring 145 to press the inclined surface 143 of the retracting safety plate 14 against the cone 135. On the cone 135, the crests of the wave-shaped groove 141 and the wave-shaped groove 142 abut against each other, and the rectangular spring 145 is in a compressed state; when the inclined surface 143 moves upward and pushes the retractable safety plate 14 to move towards the push rod 144, the rectangular spring 145 is compressed again, which makes the crests and troughs of the wave-shaped groove 141 and the wave-shaped groove 142 opposite each other, making it easier for the upper fixed plate 12 to move upward; the wave-shaped groove 141 and the wave-shaped groove 142 are both isosceles trapezoidal waveforms.

[0040] like Figure 2 and Figure 8 and Figure 13 When the punch 11 and die 21 are closed and the punch tooth 31 is stamped, a pressure rod 16 with one end extending out of the lower end face of the punch 11 is provided in the upper fixed plate 12. At this time, the pressure rod 16 corresponds to the rivet point 32 on the stator 3, so that when the punch 11 and die 21 are closed, the lower end of the pressure rod 16 enters the rivet point 32. The rotating sleeve 221 is provided with a locking ring base 25 below the die 21. The locking ring base 25 has locking strip holes 251 distributed corresponding to the rivet points 32 on the stator 3. The lower end of the 16 enters the rivet 32, which facilitates pressing the rivet 32 ​​into the locking strip hole 251. The rivet 32 ​​on the stator 3 is actually a recess formed on the stator 3, so that the rivet 32 ​​is a recess on one side of the stator 3 and a protrusion on the other side. After the stator 3 is placed into the cavity 21, the protrusion of the rivet 32 ​​corresponds to the locking strip hole 251, and is then pressed into the locking strip hole 251 by the pressure rod 16. After the cavity 21 and the punch 11 are closed, the lower end of the pressure rod 16 enters the rivet 32.

[0041] like Figure 8After the punch 11 and the groove 211 stamp the protruding tooth 31, the upper fixed plate 12 is provided with a ejector rod 17. The ejector rod 17 slides vertically and is connected to the upper fixed plate 12. The upper end of the ejector rod 17 is provided with a third compression spring 171 that moves the lower end of the ejector rod 17 out of the lower end face of the punch 11. When the third compression spring 171 is in its natural state, the lower end of the ejector rod 17 moves out of the lower end face of the punch 11. As the punch 11 and the groove 211 close, the lower end of the ejector rod 17 abuts against the stator 3, causing the ejector rod 17 to move into the upper fixed plate 12, and the third compression spring 171 is compressed. As the punch 11 and the die 21 open, the ejector rod 17 moves out of the lower end face of the punch 11 under the action of the third compression spring 171, generating a downward pushing force on the stator 3, reducing the upward movement of the stator 3 as the pressure rod 16 moves out of the rivet point 32.

[0042] like Figure 9 If it is a strip feed, in order to ensure that the stator 3 is stably in the groove 211 when the punch 11 and die 21 are opening, a stripper base 18 is sleeved on the outer wall of the fixed plate base 13. The stripper base 18 is also provided with a through hole 181 for the upper fixed plate 12 and the punch 11 to pass through. The lower end face of the stripper base 18 is provided with a stripper plate 182. The through hole 181 extends out of the lower end face of the stripper plate 182. The stripper plate 182 is used to abut against the strip on the upper end face of the rotating sleeve 221 when the punch 11 and die 21 are closing. The upper mold base 1 is circumferentially provided with several tie rods 183 that are fixedly connected to the upper end face of the stripper base 18. The tie rods 183 are slidably connected in the vertical direction in the upper mold base 1. The upper mold base 1 is adjacent to Vertically distributed extrusion holes 184 are spaced between the two tie rods 183. Each extrusion hole 184 is slidably connected to an extrusion column 1841. The lower end of the extrusion column 1841 extends out of the lower die base 2 and connects to the upper end face of the stripper base 18. An adjusting screw 185 located above the pressure plate is threaded into the extrusion hole 184. A fourth compression spring 186 is provided between the adjusting screw 185 and the extrusion column 1841. When the fourth compression spring 186 is in its natural state, the lower end face of the stripper plate 182 is located at the lower end face of the punch 11. The fourth compression spring 186 facilitates the generation of a downward pushing force on the stripper plate 182, thereby facilitating the stripper plate 182 to limit the strip with the stator 3 on the die 21 when the die is opened.

[0043] like Figure 9 After the mold is opened, the lower ends of each positioning pin 131 protrude through the stripper plate 182. The stripper plate is provided with a guide cylinder 187 that is sleeved on the outer wall of the positioning pin 131 and allows the positioning pin 131 to move up and down. The lower end of the guide cylinder 187 extends to the upper end face of the stripper plate 182. The guide cylinder 187 and the positioning hole 2211 are coaxially distributed, which further improves the accuracy of the positioning pin 131 moving up and down.

[0044] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A motor stator stamping die with a multi-stage gear rotation mechanism, comprising a die cavity (21) that matches the product shape and a punch (11) placed opposite the die cavity (21) and used in conjunction with the die cavity (21), characterized in that, The concave mold (21) and the convex mold (11) are respectively provided with N oppositely distributed grooves (211) and protrusions (111), and each groove (211) and protrusion (111) corresponds to the distribution of the protruding teeth (31) of the product shape. It also includes an anti-tooth-breakage mechanism and a rotation mechanism for driving the die (21) to rotate, the rotation mechanism being used to drive the die (21) to rotate by an angle of 360° / N each time; The anti-breakage mechanism includes an upper fixing plate (12) for fixing the punch (11). After the rotating mechanism drives the die (21) to stop rotating, if the groove (211) and the protrusion (111) are not aligned, the anti-breakage mechanism drives the upper fixing plate (12) to move away from the die (21).

2. The motor stator stamping die with a multi-stage gear rotation mechanism as described in claim 1, characterized in that, The rotating mechanism includes a positioning sleeve (22) and a rotating sleeve (221) for fixing the die (21). The rotating sleeve (221) is rotatably connected to the positioning sleeve (22) through a bearing assembly. The rotating sleeve (221) is equipped with a driven gear (222) and a power component that drives the driven gear (222) to rotate.

3. The motor stator stamping die with a multi-stage gear rotation mechanism as described in claim 2, characterized in that, The power component includes a drive gear (24) that meshes with the driven gear (222). The drive gear (24) is provided in several and meshes with each other. One of the drive gears (24) meshes with the driven gear (222). The drive gear (24) that is furthest from the driven gear (222) is driven to rotate by a servo motor (241).

4. The motor stator stamping die with a multi-stage gear rotation mechanism as described in claim 3, characterized in that, The rotating sleeve (221) has several mounting walls (229) with decreasing diameters on its outer wall inside the positioning sleeve (22). The diameter of each mounting wall (229) gradually decreases towards the driven gear (222). The bearing assembly includes a radial bearing (23) located between each mounting wall (229) and the positioning sleeve (22) and a planar bearing (231) between two adjacent mounting walls (229).

5. A motor stator stamping die with a multi-stage gear rotation mechanism as described in claim 2, characterized in that, The anti-breakage mechanism also includes an upper mold base (1) and a fixed plate base (13) fixed on the lower end face of the upper mold base (1). The upper fixed plate (12) slides up and down and is connected to the fixed plate base (13). The upper end face of the rotating sleeve (221) is provided with a number of positioning holes (2211). The fixed plate base (13) is provided with positioning pins (131) corresponding to the positioning holes (2211). When the groove (211) and the protrusion (111) are opposite to each other, the rotating mechanism drives the die (21) to rotate by an angle of 360° / N. Each positioning pin (131) corresponds to each positioning hole (2211). When the die (21) and the punch (11) are closed, the lower end of the positioning pin (131) is inserted into the positioning hole (2211). Each of the positioning pins (131) slides up and down and is connected to the upper mold base (1). The upper mold base (1) is provided with a driving component that drives the upper fixed plate (12) to move up and down. When the positioning pins (131) move upward, they cooperate with the driving component to drive the upper fixed plate (12) to move upward.

6. A motor stator stamping die with a multi-stage gear rotation mechanism as described in claim 5, characterized in that, The driving component includes a retraction safety plate (14) that slides along the length of the upper mold base (1) on the side of the upper mold base (1) facing the fixed plate base (13). The upper fixed plate (12) is provided with a plurality of wave-shaped grooves (141), and the retraction safety plate (14) is provided with wave-shaped grooves (142) opposite to the wave-shaped grooves (141). The upper mold base (1) is provided with a tensioning component that presses the upper fixed plate (12) against the retraction safety plate (14). When several of the positioning pins (131) move upward, they push the retractable safety plate (14) to move horizontally, so that the crests and troughs of the wave grooves 2 (142) and 1 (141) are opposite each other, and the tensioning member pulls the upper fixed plate (12) into the fixed plate base (13).

7. A motor stator stamping die with a multi-stage gear rotation mechanism as described in claim 6, characterized in that, The tensioning component includes a plurality of mounting holes (15) formed on the upper mold base (1). The bottom of the mounting holes (15) is threaded with fastening screws (151). The fastening screws (151) pass through the upper mold base (1) and are threaded to the upper fixing plate (12). The bottom of the mounting holes (151) and the mounting holes (15) are provided with a first compression spring (152).

8. A motor stator stamping die with a multi-stage gear rotation mechanism as described in claim 7, characterized in that, A cone (135) is coaxially fixed on the upper end face of the positioning pin (131) of the drive component. The upper mold base (1) is equipped with a second compression spring (139) that causes the lower end of the positioning pin (131) to move out of the lower end face of the punch (11). An inclined surface (143) is provided on one side of the retraction safety plate (14). When the lower end of the positioning pin (131) moves out of the lower end face of the punch (11), the inclined surface (143) abuts against the inclined surface of each cone (135). The upper mold base (1) is equipped with a clamping component that presses the inclined surface (143) against the cone (135).

9. A motor stator stamping die with a multi-stage gear rotation mechanism as described in claim 8, characterized in that, The upper fixing plate (12) has a plurality of protrusions (121) circumferentially arranged on its outer wall. The fixing plate base (13) is provided with a guide sleeve (122) for the protrusions (121) to move up and down. A ball bearing (124) assembly is provided between the guide sleeve (122) and the protrusions (121).

10. A motor stator stamping die with a multi-stage gear rotation mechanism as described in claim 8, characterized in that, The clamping component includes a push rod (144) disposed on the side of the retraction safety plate (14) away from the cone (135). A striking rod (146) is coaxially connected to one side of the push rod (144) via a rectangular spring (145). One end of the striking rod (146) extends out of the upper mold base (1).

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