An assembling device for an electric motor end cover of an electric vehicle

Abstract

The application discloses a kind of equipment for the assembly of electric motor end cover of electric vehicle, be arranged on the processing path of assembly production line, and the equipment includes, end cap feeding and attitude adjustment feeding mechanism, including the feeding rollway for conveying end cap and the attitude adjustment feeding assembly being located in the side of feeding rollway;Attitude adjustment feeding assembly includes rotatable disc body and multiple screw feeding pipes distributed along the circumference of disc body.The material taking member accurately transfers the end cap to the top of the motor to be assembled, and under the drive of the pushing member, the end cap is vertically pressed down, and the stator cylinder is completed. Finally, the knob is rotated, and the preloaded screw is finally tightened, so as to reduce the positioning error accumulation caused by the repeated handling of the end cap between multiple stations in the traditional scheme, and the assembly rhythm and the one-time qualification rate of final tightening are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of motor end cover assembly technology, and in particular to an assembly device for electric vehicle motor end covers. Background Technology

[0002] In the automated assembly of electric vehicle motors, the assembly of the motor end cover and the stator sleeve is one of the key processes. Multiple screws are typically pre-installed circumferentially on the end cover, which is then pressed onto the end of the stator sleeve, and finally the screws are tightened to secure it. This process places high demands on the positioning accuracy of the end cover and the consistency of the pre-installed screw alignment.

[0003] Currently, the common assembly method in the industry is as follows: the screws of the end cap are pre-assembled at an independent pre-assembly station, then the end cap is transferred to the pressing station via a transport mechanism, and finally the screws are tightened by another tightening mechanism. In this traditional process, the end cap loading tray, the pre-assembly station, and the pressing station are often independently positioned, resulting in a long reference transmission chain and cumulative errors that typically reach ±0.5mm or even greater. This makes it difficult to meet the stringent requirements of electric vehicle motors for assembly accuracy (such as the concentricity requirements of the threaded hole and the stator cylinder thread bottom hole). To address this, some high-end equipment employs one or more high-resolution vision systems to identify and correct the positions of end caps, screw holes, and stator cylinders. However, vision solutions have the following significant drawbacks: the introduction of high-precision industrial cameras, lenses, and supporting light sources, as well as industrial control computers, significantly increases equipment costs; multi-station vision systems further amplify investment; oil mist, dust, vibration, and changes in ambient light on the assembly line can easily affect the stability of visual recognition, leading to misjudgments or downtime; and image acquisition, processing, and result output require additional time, becoming one of the bottlenecks for accelerating production lines.

[0004] Therefore, there is an urgent need to provide an electric vehicle motor end cap assembly equipment that can achieve a high degree of uniformity between the feeding benchmark, pre-assembly benchmark and pressing benchmark, so as to improve assembly quality and production line cycle time. Summary of the Invention

[0005] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide an assembly device for an electric vehicle motor end cover, which solves the aforementioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an assembly device for an electric vehicle motor end cover, disposed on the processing path of an assembly production line, the assembly device comprising: The end cap feeding and attitude adjustment feeding mechanism includes a feeding roller for conveying end caps and an attitude adjustment feeding assembly located beside the feeding roller; the attitude adjustment feeding assembly includes a rotatable disc and multiple screw feeding tubes distributed circumferentially along the disc. The clamping and mounting assembly includes a rotatable material-grabbing component, a pusher connected to the material-grabbing component, and a knob located on the material-grabbing portion of the material-grabbing component; During operation, when the motor to be assembled moves to the station of the end cover feeding and attitude adjustment feeding mechanism along the assembly line, the picking component picks up the end cover that has been adjusted by the disc and pre-installed with screws in the feeding roller and transfers the end cover to the top of the motor to be assembled; then, driven by the pushing component, the end cover is pressed down and pressed into the stator cylinder in the motor to be assembled; then the knob component rotates to tighten the screws.

[0007] Furthermore, the feeding roller includes a substrate and a conveyor belt located in the lower part of the substrate cavity. Multiple locking blocks are evenly spaced on the surface of the conveyor belt. The end cap is driven by the conveyor belt and positioned between two adjacent locking blocks.

[0008] Furthermore, a baffle is provided at the lower part of the inner cavity of the substrate, the baffle is located above the conveyor belt, and the blocks are respectively arranged on both sides of the baffle.

[0009] Furthermore, the attitude adjustment feeding assembly also includes a first driving component and a first pushing cylinder; the output end of the first driving component is connected to the disc body, and the first pushing cylinder is connected to the first driving component.

[0010] Furthermore, the disc body has multiple through holes for screws to pass through, the number of through holes corresponding to the number of screw feeding tubes, and the position of each through hole corresponding to the position of the threaded hole on the end cap; wherein, at least one through hole is embedded with a force sensor, and the detection end of the force sensor faces the side wall of the through hole.

[0011] Furthermore, the material handling component includes a second drive component, a third drive component, and a material handling disc; wherein, the third drive component is connected to the output shaft of the second drive component, the material handling disc is connected to the output shaft of the third drive component, and the push component and the knob component are respectively connected to the material handling disc.

[0012] Furthermore, the pushing component includes a second pushing cylinder and a negative pressure guide; the negative pressure guide is sleeved on the output end of the second pushing cylinder, and the pushing shaft of the second pushing cylinder is connected to the material taking plate; the negative pressure end of the negative pressure guide passes through the material taking plate to adsorb the end cap.

[0013] Furthermore, the material receiving tray includes a base and multiple slots opened around the base, with an extension piece slidably connected in each slot.

[0014] Furthermore, a cavity is provided inside the base, and an elastic umbrella rib is provided inside the cavity. One end of the elastic umbrella rib is connected to a fourth driving member. A channel is provided between the cavity and each slot. Each rod of the elastic umbrella rib passes through its corresponding channel and is connected to its corresponding extension piece.

[0015] Furthermore, the fourth driving component is either an electric push rod or a pulling part consisting of a pull rope and a counterweight.

[0016] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as shown in the above technical solution, when the motor (including the stator cylinder) to be assembled moves to the station of the end cover loading and attitude adjustment loading mechanism along the assembly line, the picking component in the clamping and mounting assembly first acts to obtain the end cover from the loading roller. It is worth noting that the end cover has already had its screws pre-installed on the roller by the disc in the attitude adjustment loading assembly in conjunction with the screw loading tube, and the circumferential attitude of the end cover has been adjusted to correspond one-to-one with the threaded holes of the stator cylinder of the motor to be assembled. Subsequently, the picking component precisely transfers the end cover to directly above the motor to be assembled. Driven by the pushing component, the end cover is pressed vertically downwards, completing the pressing with the stator cylinder. Finally, the knob rotates to finally tighten the pre-installed screws, reducing the cumulative positioning error caused by repeated handling of the end cover between multiple stations in traditional solutions, significantly improving the assembly cycle and the first-pass yield of the final tightening.

[0017] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a perspective view of Embodiment 1 of the present invention.

[0019] Figure 2 This is Embodiment 1 of the present invention. Figure 1 Enlarged view of point A.

[0020] Figure 3 This is Embodiment 1 of the present invention. Figure 2 Enlarged view of point B.

[0021] Figure 4 This is a diagram illustrating the feeding roller conveyor of Embodiment 1 of the present invention.

[0022] Figure 5 This is a cross-sectional view of the substrate of Embodiment 1 of the present invention.

[0023] Figure 6 This is a cross-sectional view of the material handling tray in Embodiment 1 of the present invention.

[0024] Explanation of reference numerals in the attached diagram: Assembly line 10; End cap feeding and posture adjustment feeding mechanism 20; 21 feeding roller, 211 substrate, 212 conveyor belt, 213 clamp, 214 stop bar; The components include: attitude adjustment feeding assembly 22, disc body 221, screw feeding tube 222, first driving component 223, first push cylinder 224, through hole 225, and force sensor 226. Clip-on mounting component 30; Material picking component 31, second drive component 311, third drive component 312, material picking plate 313, base 3131, slot 3132, extension piece 3133, cavity 3134, elastic umbrella rib component 3135, fourth drive component 3136, channel 3137; Pushing component 32, second pushing cylinder 321, negative pressure guide component 322; Knob part 33. Detailed Implementation

[0025] Please refer to Figure 1-6 As shown, it illustrates the specific structure of a preferred first embodiment of the present invention, which is an assembly device for an electric vehicle motor end cover, disposed on the processing path of an assembly production line 10. The assembly device includes: The end cap feeding and attitude adjustment feeding mechanism 20 includes a feeding roller 21 for conveying end caps and an attitude adjustment feeding assembly 22 located beside the feeding roller 21; the attitude adjustment feeding assembly 22 includes a rotatable disc 221 and a plurality of screw feeding tubes 222 distributed circumferentially along the disc 221. The clamping and mounting assembly 30 includes a rotatable picking member 31, a pushing member 32 connected to the picking member 31, and a knob member 33 located in the picking part of the picking member 31; During operation, when the motor to be assembled moves with the assembly line 10 to the station of the end cover loading and attitude adjustment loading mechanism 20, the picking component 31 picks up the end cover that has been adjusted in attitude by the disc body 221 and pre-installed with screws in the loading roller 21, and transfers the end cover above the motor to be assembled; then, driven by the pushing component 32, the end cover is pressed down and pressed into the stator cylinder in the motor to be assembled; then the knob component 33 rotates to tighten the screws. When the motor to be assembled (including the stator cylinder) moves with the assembly line 10 to the station of the end cover loading and attitude adjustment loading mechanism 20, the picking component 31 in the clamping and mounting assembly 30 acts first to pick up the end cover from the loading roller 21. It is worth noting that the end cap has already had the screws pre-installed on the raceway by the disc 221 in the attitude adjustment feeding assembly 22 in conjunction with the screw feeding tube 222. The circumferential attitude of the end cap has been adjusted to correspond one-to-one with the threaded holes of the stator cylinder of the motor to be assembled. Subsequently, the picking component 31 precisely transfers the end cap to directly above the motor to be assembled. Driven by the pushing component 32, the end cap is pressed vertically downwards, completing the pressing with the stator cylinder. Finally, the knob 33 rotates to finally tighten the pre-installed screws, reducing the cumulative positioning error caused by repeated handling of the end cap between multiple stations in traditional solutions, significantly improving the assembly cycle time and the first-pass yield of the final tightening.

[0026] It should be noted that the end cap used in this application is circular and does not have a foolproof feature, and the through hole on the end cap is a light hole.

[0027] It needs to be clarified that the knob can be tightened by a hand-held knob tool (such as a hand-held electric screwdriver with torque control function, a tightening gun, etc.).

[0028] For example, the loading roller 21 includes a substrate 211 and a conveyor belt 212 disposed in the lower part of the inner cavity of the substrate 211. A plurality of locking blocks 213 are evenly spaced on the surface of the conveyor belt 212. The end cap is driven by the conveyor belt 212 and positioned between two adjacent locking blocks 213. The adjacent locking blocks 213 form a positioning groove that matches the outer edge contour of the end cap, preventing the end cap from sliding or shifting back and forth during the transmission process, and ensuring that after the material picker 31 picks up the end cap, the holes on the end cap and the holes on the motor stator cylinder are aligned.

[0029] It should be noted that the substrate 211 is tilted. After the front end cover is removed, the rear end cover will naturally move forward under the inertial force.

[0030] For example, a baffle 214 is provided at the lower part of the inner cavity of the substrate 211. The baffle 214 is located above the conveyor belt 212, and the clamping blocks 213 are respectively arranged on both sides of the baffle 214. The design of the baffle 214 prevents the end cap after its position is adjusted from sliding downwards, so that the end cap remains in the state of being screwed on until it is picked up by the material picker 31, thereby aligning it with the hole on the motor stator cylinder.

[0031] For example, the attitude adjustment feeding assembly 22 also includes a first driving member 223 and a first pushing cylinder 224; the output end of the first driving member 223 is connected to the disc body 221, and the first pushing cylinder 224 is connected to the first driving member 223. The first pushing cylinder 224 drives the disc body 221 to press down as a whole, so that the end of the screw feeding tube 222 is always in contact with the upper surface of the end cap. At the same time, the first driving member 223 drives the disc body 221 to rotate at a low speed, so that the screw feeding tube 222 continuously scans the upper surface of the end cap. When the screw feeding tube 222 slides into the through hole of the end cap, the axial resistance changes abruptly, and the rotation of the first driving member 223 stops based on this, while the first pushing cylinder 224 resets.

[0032] For example, the disc body 221 has multiple through holes 225 for screws to pass through. The number of through holes 225 corresponds to the number of screw feeding tubes 222, and the position of each through hole 225 corresponds one-to-one with the position of the threaded hole on the end cap. At least one through hole 225 is embedded with a force sensor 226, and the detection end of the force sensor 226 faces the side wall of the through hole 225. When the first push cylinder 224 drives the disc body 221 to press down, causing the screw feeding tube 222 to fit against the upper surface of the end cap, and the first drive member 223 drives the disc body 221 to rotate at low speed to scan, the end of the screw feeding tube 222 slides on the upper surface of the end cap. Once the screw feeding tube 222 is aligned with the through hole of the end cap, its end enters the through hole. At this instant, the side wall of the screw feeding tube 222 will make slight contact with the side wall of the through hole 225. The force sensor 226 immediately detects the contact force signal and feeds it back to the control system. The system then controls the first drive member 223 to stop rotating, completing the alignment.

[0033] It should be noted that a pneumatic or electric baffle is also provided inside the disc body 221. This baffle is located inside the through hole 225, so that the screws inside the through hole 225 will not fall out when the disc body 221 and the end cover are separated.

[0034] For example, the material picking component 31 includes a second drive component 311, a third drive component 312, and a material picking disk 313; wherein, the third drive component 312 is connected to the output shaft of the second drive component 311, the material picking disk 313 is connected to the output shaft of the third drive component 312, and the push component 32 and the knob component 33 are respectively connected to the material picking disk 313. The second driving component 311 drives the picking tray 313 to move horizontally between the picking station and the pressing station, realizing the spatial transfer of the end cover; the third driving component 312 drives the picking tray 313 to tilt, so that the picking surface of the picking tray 313 can adaptively match the tilt angle of the end cover on the substrate 211, thereby realizing reliable picking in the tilted state during picking; after the picking tray 313 carries the end cover to the pressing station, the third driving component 312 reverses the action to restore the picking tray 313 to the horizontal position, and at the same time the pushing component 32 drives the picking tray 313 to extend downward, so that the end cover contacts the end face of the stator cylinder and completes the pressing.

[0035] For example, the pusher 32 includes a second push cylinder 321 and a negative pressure guide 322; the negative pressure guide 322 is sleeved on the output end of the second push cylinder 321, and the push shaft of the second push cylinder 321 is connected to the pick-up disk 313; the negative pressure end of the negative pressure guide 322 passes through the pick-up disk 313 to adsorb the end cap. When the pick-up disk 313 moves above the end cap, the negative pressure guide 322 is activated, and its negative pressure end passes through the pick-up disk 313 to adsorb the surface of the end cap, completing a non-contact flexible pickup and avoiding scratches on the surface of the end cap caused by the rigid grippers; subsequently, the push shaft of the second push cylinder 321 extends, driving the pick-up disk 313 together with the adsorbed end cap to move downward, so that the end cap contacts the end face of the stator cylinder and completes the pressing.

[0036] For example, the pick-up tray 313 includes a base 3131 and a plurality of slots 3132 formed around the base 3131, each slot 3132 having an extension piece 3133 slidably connected therein. After the end cap is picked up by adsorption, each extension piece 3133 extends outward from the slot 3132 and into the gap between the screw head and the upper surface of the end cap, forming a mechanical barrier on the screw head from above, preventing the screw from being pushed upward out of the through hole due to gravity or vibration during subsequent transfer, posture change and pressing. When the end cap is pressed against the end face of the stator cylinder and the knob 33 begins to tighten the screw, the extension piece 3133 retracts inward into the slot 3132, releasing the constraint on the screw head, so that the screw can be smoothly screwed downward into the threaded bottom hole of the stator cylinder under the drive of the knob 33.

[0037] For example, the base 3131 has a cavity 3134 inside, and the cavity 3134 has an elastic umbrella rib 3135. One end of the elastic umbrella rib 3135 is connected to a fourth driving member 3136. The cavity 3134 and each slot 3132 are respectively provided with a channel 3137. Each rod of the elastic umbrella rib 3135 passes through its corresponding channel 3137 and is connected to the corresponding extension piece 3133. When the material pick-up tray 313 is in an inclined picking-up state, the fourth drive member 3136 pulls the elastic umbrella member 3135, which is opened up. Each of its rods passes through the corresponding channel 3137 and pushes the extension piece 3133 in each slot 3132 to extend outward synchronously, so that each extension piece 3133 extends into the gap between the screw head and the upper surface of the end cap, forming a mechanical obstruction on the screw head from above, preventing the screw from falling off due to gravity or vibration in the inclined posture. When the material pick-up tray 313 completes picking up the material and turns to a horizontal posture for pressing, and the screw needs to be released for the knob member 33 to tighten, the fourth drive member 3136 moves in the opposite direction. The elastic umbrella member 3135 relies on its own elastic restoring force to drive each extension piece 3133 to retract inward synchronously into the slot 3132, releasing the obstruction on the screw head.

[0038] For example, the fourth driving component 3136 is a pulling part consisting of an electric push rod or a pull rope and a counterweight. When the picking tray 313 tilts to pick up material, the counterweight falls under the action of gravity, and the pull rope pulls the elastic umbrella rib 3135 to open, so that the extension plate 3133 extends out simultaneously to block the screw head; when the picking tray 313 turns to a horizontal position, the counterweight is pulled up, and the elastic umbrella rib 3135 closes by its own elasticity, driving the extension plate 3133 to retract simultaneously.

[0039] It should be noted that the counterweight is installed on the upper end face of the material receiving plate 313 and is connected to the material receiving plate 313 through a sliding block.

[0040] In summary, the key design focus of this invention is; 1.1 The end cap (circular, without anti-fooling features, and with a smooth through-hole) is conveyed via the feeding roller 21. The roller is inclined, and the end cap is confined in the positioning groove by equally spaced locking blocks 213 on the conveyor belt 212 to prevent sliding and displacement. The baffle 214 further maintains the stable posture of the end cap when it is waiting to be picked up; 1.2 Once the end cap reaches the workstation, the attitude adjustment and feeding assembly 22 is activated. The first push cylinder 224 drives the disc 221 to press down, causing the screw feeding tube 222 to fit against the upper surface of the end cap; the first drive component 223 drives the disc to rotate at low speed to scan. When the screw feeding tube slides into the through hole of the end cap, the force sensor 226 embedded in the through hole 225 of the disc detects a sudden change in the side wall contact force, and the system immediately stops rotating, completing the alignment. At this time, the screw is pre-loaded into the light hole of the end cap through the screw feeding tube, and the baffle inside the disc prevents the screw from falling out; 1.3 The material-grabbing component 31 of the clamping and mounting assembly 30 is activated. The third driving component 312 drives the material-grabbing disc 313 to tilt, adaptively matching the tilt angle of the feeding roller; the negative pressure guide component 322 passes through the adsorption end cap of the material-grabbing disc to achieve non-contact flexible picking; After being picked up, the fourth drive unit 3136 drives the elastic umbrella rib 3135 to open, pushing the extension pieces 3133 in each slot 3132 to extend outward synchronously, inserting into the gap between the screw head and the upper surface of the end cap, mechanically blocking the screw from above to prevent it from popping out during subsequent transfer or posture changes. The second drive unit 311 drives the material pick-up plate to move horizontally to the pressing station; at the same time, the third drive unit moves in the opposite direction to restore the material pick-up plate to a horizontal position, ready for pressing. 1.4 The second push cylinder 321 in the pusher 32 drives the material pick-up plate to press down, so that the end cover and the stator cylinder end face of the motor to be assembled are pressed together. When the end cover is pressed into place and the knob 33 is ready to be tightened, the fourth drive component moves in the opposite direction. The elastic umbrella rib relies on its own elasticity to retract, driving the extension piece to retract into the slot synchronously, releasing the obstruction to the screw head.

[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An assembly device for an electric vehicle motor end cap, disposed on the processing path of an assembly production line (10), characterized in that, The assembly equipment includes: The end cap feeding and attitude adjustment feeding mechanism (20) includes a feeding roller (21) for conveying end caps and an attitude adjustment feeding assembly (22) located beside the feeding roller (21); the attitude adjustment feeding assembly (22) includes a rotatable disc (221) and a plurality of screw feeding tubes (222) distributed circumferentially along the disc (221). The clamping and mounting assembly (30) includes a rotatable material picker (31), a pusher (32) connected to the material picker (31), and a knob (33) located in the material picker portion of the material picker (31). The material handling component (31) includes a second drive component (311), a third drive component (312), and a material handling plate (313); wherein the third drive component (312) is connected to the output shaft of the second drive component (311), the material handling plate (313) is connected to the output shaft of the third drive component (312), and the push component (32) and the knob component (33) are respectively connected to the material handling plate (313); The feeding tray (313) includes a base (3131) and a plurality of slots (3132) opened around the base (3131), and an extension piece (3133) is slidably connected in each slot (3132). The base (3131) has a cavity (3134) inside, and an elastic umbrella rib (3135) is provided in the cavity (3134). One end of the elastic umbrella rib (3135) is connected to a fourth driving member (3136). A channel (3137) is provided between the cavity (3134) and each of the slots (3132). Each rod of the elastic umbrella rib (3135) passes through its corresponding channel (3137) and is connected to the corresponding extension piece (3133). During operation, when the motor to be assembled moves with the assembly line (10) to the station of the end cap feeding and attitude adjustment feeding mechanism (20), the picking component (31) picks up the end cap that has been adjusted in attitude by the disc body (221) and pre-installed with screws in the feeding roller (21), and transfers the end cap to the top of the motor to be assembled; then, driven by the pushing component (32), the end cap is pressed down and pressed into the stator cylinder in the motor to be assembled; then the knob component (33) rotates to tighten the screws.

2. The assembly equipment for an electric vehicle motor end cover according to claim 1, characterized in that: The feeding roller (21) includes a substrate (211) and a conveyor belt (212) located in the lower part of the inner cavity of the substrate (211). The surface of the conveyor belt (212) is provided with multiple locking blocks (213) at equal intervals. The end cap is driven by the conveyor belt (212) and positioned between two adjacent locking blocks (213).

3. The assembly equipment for an electric vehicle motor end cover according to claim 2, characterized in that: The lower part of the inner cavity of the substrate (211) is provided with a baffle (214), the baffle (214) is located above the conveyor belt (212), and the card blocks (213) are respectively arranged on both sides of the baffle (214).

4. The assembly equipment for an electric vehicle motor end cover according to claim 1, characterized in that: The attitude adjustment feeding assembly (22) further includes a first driving member (223) and a first push cylinder (224); the output end of the first driving member (223) is connected to the disc body (221), and the first push cylinder (224) is connected to the first driving member (223).

5. An assembly device for an electric vehicle motor end cover according to claim 4, characterized in that: The disc body (221) has a plurality of through holes (225) for screws to pass through. The number of through holes (225) corresponds to the number of screw feeding tubes (222), and the position of each through hole (225) corresponds one-to-one with the position of the threaded hole on the end cap. At least one of the through holes (225) is embedded with a force sensor (226), and the detection end of the force sensor (226) faces the side wall of the through hole (225).

6. The assembly equipment for an electric vehicle motor end cover according to claim 1, characterized in that: The pusher (32) includes a second pusher cylinder (321) and a negative pressure guide (322); the negative pressure guide (322) is sleeved on the output end of the second pusher cylinder (321), and the pusher shaft of the second pusher cylinder (321) is connected to the material taking plate (313); the negative pressure end of the negative pressure guide (322) passes through the material taking plate (313) to adsorb the end cap.

7. An assembly device for an electric vehicle motor end cover according to claim 1, characterized in that: The fourth driving component (3136) is a pulling part consisting of an electric push rod or a pull rope and a counterweight.

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