A motor rotor end cover assembly mechanism and assembly equipment using the same.

Abstract

This invention provides a motor rotor end cover assembly mechanism and assembly equipment using the same, comprising a mounting frame, a bearing pushing mechanism, an end cover positioning mechanism, and a first rotor positioning mechanism. The bearing pushing mechanism consists of a bearing pushing module and a pressure head; the pressure head contacts the upper surface of the bearing inner ring and moves under the drive of the bearing pushing module; the first rotor positioning mechanism positions the rotor center; the end cover positioning mechanism consists of an end cover pushing module and an end cover positioning module, the end cover positioning module placing the end cover and positioning its center, and moving under the drive of the end cover pushing module. The mechanism and equipment provided by this invention, during the assembly of the end cover bearing and the rotor shaft, utilize the bearing pushing mechanism to drive the pressure head to apply pressure to the rotor bearing, thereby achieving assembly of the end cover and rotor. This avoids different parts of the end cover being subjected to forces in different directions, reducing the risk of end cover structural deformation or damage.

Description

Technical Field

[0001] This invention relates to the field of motor assembly technology, and in particular to a motor rotor end cover assembly mechanism and assembly equipment using the same. Technical Background

[0002] In the automated assembly process of the end cover rotor, the automated mechanism clamps the end cover and uses the pressing mechanism to press the end cover down until it contacts the rotor, until the assembly is completed. For example, the automatic assembly device for the rotor and end cover of a permanent magnet synchronous motor disclosed in patent document CN 107317440A includes a rotor gripping assembly and an end cover gripping assembly. The rotor is clamped by the rotor gripper and the end cover gripper grasps the terminal. Under the drive of the pressing rod assembly, the end cover moves radially and is pressed down to complete the clamping of the end cover, thereby realizing the assembly.

[0003] During the assembly process, the end cover bearing and the rotor shaft need to be interference-fitted, requiring a lot of pressure to be applied to the end cover to achieve assembly. At the same time, during the assembly of the end cover and rotor, the parts in direct contact are the inner ring of the bearing and the rotor shaft. During assembly, an axial force will be generated on the inner ring of the bearing. Different parts of the end cover are subjected to forces in different directions, which may lead to deformation or damage to the end cover structure. On the other hand, excessive axial force may also cause bearing damage, affect the assembly effect and the performance of the assembled components. Summary of the Invention

[0004] The present invention aims to solve the above problems by providing a motor rotor end cover assembly mechanism and assembly equipment using the same, which reduces the risk of end cover structure deformation or damage, and can counteract the axial force generated during assembly and avoid bearing damage.

[0005] The present invention solves the aforementioned problem by employing the following technical solution: a motor rotor end cover assembly mechanism, comprising a mounting frame, a bearing pushing mechanism, an end cover positioning mechanism, and a first rotor positioning mechanism; the bearing pushing mechanism, the end cover positioning mechanism, and the first rotor positioning mechanism are mounted on the mounting frame; the bearing pushing mechanism comprises a bearing pushing module and a pressure head; the bearing pushing module is fixedly mounted on the mounting frame, and the pressure head is used to contact the upper surface of the bearing inner ring, the pressure head being connected to the bearing pushing module and moving under the drive of the bearing pushing module; the end cover positioning mechanism comprises an end cover pushing module and an end cover positioning module; the end cover positioning module is used to place the end cover and position its center, the end cover pushing module is fixedly mounted on the mounting frame, and the end cover positioning module is connected to the end cover... The push module connects and moves under the drive of the end cap push module. The end cap push module moves the end cap positioned by the end cap positioning module to the assembly position to assemble with the rotor positioned by the first rotor positioning mechanism, or moves the end cap positioning module away from the assembly position. The first rotor positioning mechanism is used to position the rotor center. The bearing push mechanism and the end cap positioning mechanism are located on the same side of the first rotor positioning mechanism. The pressure head and the first rotor positioning mechanism are respectively located on opposite sides of the plane where the bearing positioning surface of the end cap positioning mechanism is located. The positioning center of the end cap positioning mechanism and the positioning center of the first rotor positioning mechanism are located on the same axis. The bearing push module drives the pressure head to move along the axis direction. The end cap push module drives the end cap positioning module to move along the axis direction.

[0006] The end cap positioning module consists of a lateral pushing component and N sets of gripper assemblies, where N≥2. The lateral pushing component is mounted on the end cap pushing module and moves under the drive of the end cap pushing module. The gripper assemblies are mounted on the lateral pushing component via the base plate and move closer to or away from the axis under the drive of the lateral pushing component.

[0007] The gripper assembly is provided with a gripping block. The horizontal support surface of the gripping block is used to support the lower surface A1 of the end cap. The side gripping surface of the gripping block contacts and grips the side positioning surface A2 of the end cap. After the side gripping surfaces of N sets of gripping blocks contact and grip the side positioning surface A2 of the end cap, the lateral pushing assembly controls the gripping blocks to move away from each other, and the end cap supports the lower surface A1 of the end cap through the horizontal support surface of the gripping block.

[0008] The motor rotor end cover assembly mechanism further includes: a second rotor positioning mechanism; the second rotor positioning mechanism is mounted on the mounting frame and consists of a second pushing module and a second positioning module; the second positioning module is used to contact the rotor assembly end positioning structure B1 and position the rotor center; the second pushing module is mounted on the mounting frame, and the second positioning module is mounted on the second pushing module, moving along the axial direction under the drive of the second pushing module; the diameter of the second positioning module is smaller than the bearing inner diameter, and it is used to pass through the inner ring of the end cover bearing to dock with or retract the rotor assembly end positioning structure B1; the positioning center of the second positioning module is located on the axial direction.

[0009] The first rotor positioning mechanism is a center module, with the center of the center module facing the direction of the bearing pushing mechanism and the center of the center located on the axis. The center module is structurally compatible with the rotor non-assembly end positioning structure B2. The second positioning module is a center guide rod, which is arranged along the axis. The center of the center guide rod faces the first rotor positioning mechanism and the center of the center guide rod is located on the axis. The center guide rod is structurally compatible with the rotor assembly end positioning structure B1.

[0010] The pressure head is a sleeve structure; the inner diameter of the sleeve structure is larger than the diameter of the second positioning module; the center of the pressure surface of the pressure head is located on the axis.

[0011] The bearing pushing module consists of a linear pushing component and a guiding component. The linear pushing component is fixedly mounted on the mounting frame. The guiding component is connected to the pressure head via a first mounting plate at one end and a second mounting plate at the other end, and moves under the drive of the linear pushing component. The second pushing module consists of a second linear pushing component and a transition module. The second linear pushing component is fixedly mounted on the mounting frame. The transition plate of the transition module is mounted on the second linear pushing component. The transition block is connected to the transition plate on its side and to the second positioning module on its bottom. The transition module moves under the drive of the second linear pushing component. The transition block is located between the first mounting plate and the second mounting plate. The second positioning module passes through the holes on the first mounting plate and the inside of the pressure head in sequence, and extends out of the pressure surface of the pressure head or retracts under the drive of the second pushing module.

[0012] The connecting member of the guide assembly is a linear guide rod, which is arranged along the axial direction. The adapter block has a hole, and the linear guide rod passes through the hole of the adapter block.

[0013] A motor rotor end cover assembly equipment, employing the aforementioned motor rotor end cover assembly mechanism, further includes a control system. The mounting frame includes a stand and a base. A bearing pushing mechanism and an end cover positioning mechanism are mounted on the stand. A first rotor positioning mechanism is mounted on the base. The bearing pushing mechanism and the end cover positioning mechanism are located above the first rotor positioning mechanism. The positioning centers of the end cover positioning mechanism and the first rotor positioning mechanism are located on the same vertical line. After the pressure head contacts the bearing of the end cover that has passed the positioning center of the end cover positioning module under the drive of the bearing pushing module, the bearing pushing module and the end cover pushing module synchronously drive the pressure head and the end cover to move towards the first rotor positioning mechanism.

[0014] The motor rotor end cover assembly equipment includes the following assembly method:

[0015] The mechanism on the assembled equipment is in the assembly preparation state.

[0016] The end cap is grasped and placed onto the end cap positioning mechanism to position the end cap.

[0017] The rotor is grasped and placed onto the first rotor positioning mechanism to position the rotor.

[0018] The bearing push module is controlled to move the pressure head toward the bearing and stop moving after contacting the inner ring of the bearing.

[0019] The end cap positioning module is released, and the end cap remains within a defined floating range;

[0020] The end cap positioning module and the pressure head are controlled to move simultaneously toward the rotor. After the inner ring of the end cap bearing contacts the rotor, the movement continues until the bearing and end cap are in place to form the end cap rotor assembly and then the movement stops.

[0021] Control the end cap positioning module and the pressure head to release the end cap;

[0022] The clamping end cap rotor assembly is removed from the assembly equipment, and the process ends.

[0023] Pressure sensors are respectively provided on the first rotor positioning mechanism, the bearing pushing mechanism, and the second rotor positioning mechanism.

[0024] The beneficial effects of the present invention are as follows: The motor rotor end cover assembly mechanism provided by the present invention consists of a bearing pushing mechanism, an end cover positioning mechanism, and a rotor positioning mechanism. The rotor positioning mechanism positions the rotor center, and the end cover positioning mechanism positions the end cover center and drives the end cover to move in the direction of the rotor. When the end cover bearing contacts and assembles with the rotor shaft, the bearing pushing mechanism drives the pressure head to apply pressure to the rotor bearing to achieve assembly. This avoids different parts of the end cover being subjected to forces in different directions, reduces the risk of end cover structural deformation or damage, and at the same time offsets the axial force generated during assembly, solving the problem of excessive axial force damaging the bearing.

[0025] Furthermore, multiple positioning mechanisms, including the first and second rotor positioning mechanisms, simultaneously contact and center the rotor from both the non-assembly and assembly ends, ensuring that no eccentricity occurs during rotor reassembly and thus improving the stability of the assembly process. A custom-designed end cap clamp holds the outer surface of the end cap from both sides to center its position and then releases it. The end cap is supported only by the clamping block support surface, providing a certain degree of floating for the end cap during assembly and preventing the clamping force from locking the center of the end cap. This provides an adaptive correction function when the center deviates. Through the integrated design of the rotor positioning mechanism and the bearing driving mechanism, the overall layout of the assembly equipment is optimized, making the structure more compact. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the bearing driving mechanism 2 in this invention;

[0029] Figure 3 This is a schematic diagram of the end cap positioning mechanism 3 in this invention;

[0030] Figure 4 This is a schematic diagram of the end cap positioning module 32 in one embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the gripper assembly 322 in one embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the gripper 3222 in one embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the end cap structure in this invention;

[0034] Figure 8 This is a schematic diagram of the structure of the second rotor positioning mechanism 5 in this invention;

[0035] Figure 9 This is a schematic diagram of the structure of the pressure head 22 in one embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the bearing drive module 21 in one embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the structure of the second pushing module 51 in one embodiment of the present invention;

[0038] Figure 12 This is a schematic diagram of the integrated structure of the bearing pushing mechanism 2 and the second rotor positioning mechanism 5 in one embodiment of the present invention;

[0039] Figure 13 This is a schematic diagram of the structure of the mounting bracket 1 in one embodiment of the present invention;

[0040] Figure 14 This is a schematic diagram showing the end cap and rotor in a state to be assembled according to one embodiment of the present invention;

[0041] Figure 15 This is a schematic diagram of the rotor and dummy shaft in this invention;

[0042] Figure 16 This is a schematic diagram showing the position of the first pressure sensor 82 in one embodiment of the present invention;

[0043] Figure 17 This is a schematic diagram showing the position of the second pressure sensor 83 in one embodiment of the present invention. Detailed Implementation

[0044] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] A motor rotor end cover assembly mechanism, such as Figure 1 As shown, it consists of a mounting frame 1, a bearing pushing mechanism 2, an end cover positioning mechanism 3, and a first rotor positioning mechanism 4; the bearing pushing mechanism 2, the end cover positioning mechanism 3, and the first rotor positioning mechanism 4 are mounted on the mounting frame 1;

[0046] Bearing drive mechanism 2 Figure 2 As shown, it consists of a bearing push module 21 and a pressure head 22. The bearing push module 21 is fixedly installed on the mounting frame 1. The pressure head 22 is used to contact the upper surface of the inner ring of the bearing. The rotor and stator are defined as being in the assembly state. The bearing side closer to the rotor is the lower surface, and the side farther away is the upper surface. The pressure head 22 is connected to the bearing push module 21 and moves under the drive of the bearing push module 21.

[0047] End cap positioning mechanism 3 Figure 3As shown, it consists of an end cap pushing module 31 and an end cap positioning module 32. The end cap positioning module 32 is used to place the end cap and position the center of the end cap. The end cap pushing module 31 is fixedly installed on the mounting frame 1. The end cap positioning module 32 is connected to the end cap pushing module 31 through the mounting plate 33 and moves under the drive of the end cap pushing module 31. The end cap pushing module 31 drives the end cap positioned by the end cap positioning module 32 to move to the assembly position to assemble with the rotor positioned by the first rotor positioning mechanism 4, or drives the end cap positioning module 32 away from the assembly position.

[0048] In one embodiment, the end cap pushing module 31 is a linear module with a motor, and the end cap positioning module 32 is mounted on the slider of the linear module via a mounting plate 33 and moves under the drive of the end cap pushing module 31.

[0049] Each side of the end cap pushing module 31 is provided with a first linear guide rail 34. The first linear guide rail 34 is fixed on the mounting bracket 1 and arranged along the axial direction. The end cap positioning module 32 is mounted on the slider of the first linear guide rail 34 through the mounting plate 33. The first linear guide rail 34 provides a certain guiding effect for the movement of the end cap positioning module 32 and improves the straightness of the movement.

[0050] The first rotor positioning mechanism 4 is used to position the rotor center;

[0051] End cap positioning module 32 is used to position the center of the end cap;

[0052] The bearing driving mechanism 2 and the end cover positioning mechanism 3 are located on the same side as the first rotor positioning mechanism 4;

[0053] The pressure head 22 and the first rotor positioning mechanism 4 are respectively located on opposite sides of the plane where the bearing positioning surface of the end cover positioning mechanism 3 is located. The upper surface of the end cover bearing positioned by the end cover positioning mechanism 3 is defined as the bearing positioning surface. For example, when the first rotor positioning mechanism 4 is located below the plane where the bearing positioning surface is located, the pressure head 22 is located above the plane where the bearing positioning surface is located.

[0054] The positioning centers of the end cap positioning mechanism 3 and the first rotor positioning mechanism 4 are corresponding and located on the same axis. The center lines of the end cap positioned by the positioning center of the end cap positioning mechanism 3 and the rotor positioned by the positioning center of the first rotor positioning mechanism 4 are coaxial.

[0055] The bearing pushing module 21 and the end cover pushing module 31 respectively drive the pressure head 22 and the end cover positioning module 32 to move along the axial direction.

[0056] Within the moving range of the end cover pushing module 31, the end cover positioned by the end cover positioning module 32 can maintain a distance from the rotor positioned by the first rotor positioning mechanism 4; it can also be driven by the end cover pushing module 31, and the end cover positioning module 32 can move to the assembly position in the direction of the first rotor positioning mechanism 4, and the end cover bearing positioned by the end cover positioning module 32 can contact the rotor assembly end and be assembled in place.

[0057] Driven by the bearing pushing module 21, the pressure head 22 can move away from the plane where the bearing positioning surface is located, and can also approach and contact the upper surface of the bearing positioned by the end cover positioning module 32.

[0058] Within the range of movement of the bearing push module 21, the pressure head 22 can always maintain a certain distance from or contact the bearing positioning surface of the end cover positioning mechanism 3.

[0059] End cap positioning module 32 Figure 4 As shown, the end cap positioning module 32 consists of a lateral pushing component 321 and N sets of gripper assemblies 322, where N ≥ 2. The lateral pushing component 321 is mounted on the end cap pushing module 31 via a mounting plate 33 and moves under the drive of the end cap pushing module 31. The N sets of gripper assemblies 322 are mounted on the lateral pushing component 321 via a base plate 323 and move closer to or away from the axis under the drive of the lateral pushing component 321. The mounting plate 33 is also provided with two lateral linear guide rails 324, which are arranged perpendicular to the axis and distributed on both sides of the end cap pushing module 31. The lateral linear guide rails 324 provide a certain guiding effect for the movement of the gripper assemblies 322 and improve the straightness of the movement.

[0060] In one embodiment, there are two gripper assemblies 322, symmetrically distributed on both sides of the axis.

[0061] The centerline of the end cap positioning module 32 is the positioning center of the end cap positioning module 32.

[0062] gripper assembly 322, such as Figure 5 As shown, it includes a gripper mounting plate 3221 and a gripper 3222. The gripper 3222 is provided with a clamping block 32221. The horizontal support surface of the clamping block 32221 is used to support the lower surface A1 of the end cap. The side clamping surface of the clamping block 32221 contacts and clamps the side positioning surface A2 of the end cap.

[0063] The side clamping surfaces of the N-group clamping blocks 32221 contact and clamp the side positioning surface A2 of the end cap. After positioning the center of the end cap, the lateral pushing component 321 controls the clamping blocks 32221 to move away from each other by a release margin, maintaining a gap with the side positioning surface A2. The end cap supports the lower surface A1 of the end cap through the horizontal support surface of the clamping blocks 32221.

[0064] In one embodiment, the clamping blocks approach each other, contact and clamp the end cap. The side clamping surfaces of the clamping blocks clamp the side positioning surface A2 of the end cap, and the horizontal supporting surfaces of the clamping blocks support the lower surface A1 of the end cap, thereby positioning the end cap. After positioning the end cap, the clamping blocks move away from each other and release a certain amount of space. Only the horizontal supporting surfaces of the clamping blocks support the lower surface A1 of the end cap. In this way, the clamping blocks only support the end cap with their horizontal supporting surfaces, and the horizontal clamping force disappears, providing a certain amount of floating space for the end cap during assembly. Conversely, if the gripper assembly locks the center of the end cap with the clamping force of the clamping surfaces of the clamping blocks and does not provide any floating space for the end cap, it will be unable to correct the deviation when the center of the end cap deviates, and the end cap may get stuck during assembly.

[0065] Since the end cover needs to be supported by the horizontal support surface of the clamping block, the clamping assembly using this structure should be used in vertical assembly, that is, the end cover and the rotor are arranged vertically. For example, in the assembly state, the end cover is on top and the rotor is on the bottom. By moving the end cover downward, the end cover bearing and the rotor shaft come into contact and are pressed into place, thus assembling the end cover rotor assembly.

[0066] In one embodiment, such as Figure 6 As shown, the gripper 3222 has two clamping blocks 32221, with an included angle of less than 180° between them. The angle and distribution of the clamping blocks are adapted to the shape of the positioning surface on the outer surface of the end cap. The clamping blocks are rectangular, with the clamping surface being the inner vertical surface of the clamping block, and the upper surface of the clamping block serving as the supporting surface for supporting the end cap. Figure 7 As shown, the lower surface A1 of the end cap is the lower surface of the flange, and the positioning surface A2 of the end cap is the outer surface of the stop. During the assembly process, the floating range of the end cap is between the distance between the clamping surface of the clamping block and the outer surface of the stop of the end cap.

[0067] In another embodiment, the clamping block is an L-shaped structure composed of a vertical clamping plate and a horizontal clamping plate. The inner surface of the vertical clamping plate is the clamping surface, and the upper surface of the horizontal clamping plate is the supporting surface, which is used to support the end cap. The lower surface A1 of the end cap is the lower surface of the flange, and the side positioning surface A2 of the end cap is the outer surface of the flange. The clamping surface of the vertical clamping plate contacts and clamps the side positioning surface A2 of the end cap. After being released, the lower surface A1 of the end cap is supported only by the upper surface of the horizontal clamping plate.

[0068] In one embodiment, the end cap positioning module 32 consists of a motor and a lead screw that moves relative to each other. The motor provides the drive, and the lead screw provides the direction of movement. The lead screw is arranged perpendicular to the axis and has a slider on it, which moves relative to or away from the motor.

[0069] Two sets of gripper assemblies 322 are symmetrically mounted on different lead screw sliders. Similarly, they move relative to each other or away from each other under the drive of the motor, thereby contacting and tightening the end cover or loosening the end cover.

[0070] In one embodiment, the motor rotor end cover assembly mechanism further includes:

[0071] The second rotor positioning mechanism 5, the first rotor positioning mechanism 4, and the second rotor positioning mechanism 5 contact and position the rotor from different parts.

[0072] The second rotor positioning mechanism 5 is mounted on the mounting bracket 1, such as Figure 8 As shown, it consists of a second pushing module 51 and a second positioning module 52; the second positioning module 52 is used to contact the rotor assembly end positioning structure B1 and position the rotor center.

[0073] The second pushing module 51 is mounted on the mounting bracket 1, and the second positioning module 52 is mounted on the second pushing module 51. The second positioning module 52 moves along the axial direction under the drive of the second pushing module 51.

[0074] The diameter of the second positioning module 52 is smaller than the inner diameter of the bearing, and it is used to pass through the inner ring of the end cover bearing to dock with or retract the rotor assembly end positioning structure B1.

[0075] The positioning center of the second positioning module 52 is located on the axis.

[0076] In one embodiment, the first rotor positioning mechanism 4 is a top module, with the top of the top module facing the direction of the bearing pushing mechanism 2, the center of the top being located on the axis, and the top module fitting the structure of the rotor non-assembly end positioning structure B2.

[0077] In one embodiment, the second positioning module 52 is a top guide rod, which is arranged along the axial direction. The top of the top guide rod faces the first rotor positioning mechanism 4, and the center of the top of the top guide rod is located on the axis. The top guide rod is structurally matched with the rotor assembly end positioning structure B1.

[0078] Since both the bearing driving mechanism 2 and the second rotor positioning mechanism 5 contact the rotor or end cover bearing from above, in order to avoid structural interference between the two and to make the overall structure compact, the following structural design is adopted in one embodiment:

[0079] Pressure head 22 Figure 9 As shown, this is a sleeve structure; the inner diameter of the sleeve structure is larger than the diameter of the second positioning module 52.

[0080] The center of the pressing surface of the pressure head 22 is located on the axis.

[0081] Bearing drive module 21 Figure 10 As shown, it consists of a linear drive component 211 and a guide component 212;

[0082] The linear drive assembly 211 is fixedly installed on the mounting bracket 1. The guide assembly 212 is connected to the pressure head 22 through the first mounting plate 2121 at one end. The pressure head 22 is installed on the first mounting plate 2121 through the mounting flange 221. The second mounting plate 2122 at the other end of the guide assembly 212 is connected to the linear drive assembly 211 and moves under the drive of the linear drive assembly 211.

[0083] Second propulsion module 51 Figure 11 As shown, it consists of a second linear push assembly 511 and a transfer module 512. The second linear push assembly 511 is fixedly installed on the mounting bracket 1. The transfer plate 5121 of the transfer module 512 is installed on the second linear push assembly 511. The transfer block 5122 is connected to the transfer plate 5121 on the side and connected to the second positioning module 52 at the bottom. The transfer module 512 moves under the drive of the second linear push assembly 511.

[0084] The adapter block 5122 is located between the first mounting plate 2121 and the second mounting plate 2122;

[0085] The second positioning module 52 passes through the holes on the first mounting plate 2121 and the inside of the pressure head 22 in sequence, and extends out of the pressure surface of the pressure head 22 or retracts under the drive of the second pushing module 51.

[0086] The second push module 51 extends out of the pressure head 22 and docks with the rotor assembly, making it easy to observe whether it has contacted the rotor assembly.

[0087] In one embodiment, the linear push assembly 211 consists of an electric cylinder and a push rod. One end of the push rod is connected to the electric cylinder shaft, and the other end is connected to the pressure head 22. The electric cylinder has a built-in pressure sensor, which can be set at the connection between the electric cylinder shaft and the push rod. When the pressure head 22 applies force to the bearing surface, the built-in pressure sensor displays a value. The electric cylinder shaft extends to push the push rod, and the reaction force is applied to the pressure sensor.

[0088] The servo motor encoder on the electric cylinder can obtain the extension distance, thereby determining the distance that the linear drive assembly 211 drives the pressure head 22 to move.

[0089] When the electric cylinder shaft extends, the connected guide assembly 212 and pressure head 22 will be driven to press down. The pressure head 22 is customized according to different models of bearings, and the pressing surface presses on the inner ring of the bearing.

[0090] In one embodiment, the second linear actuator 511 consists of a motor and a lead screw. The motor drives the lead screw to move, and the lead screw is provided with a slider that is connected to the adapter plate 5121.

[0091] In one embodiment, such as Figure 12As shown, the connector 2123 of the guide assembly 212 is a linear guide rod, which is set along the axial direction. The adapter block 5122 has a hole, the inner diameter of which is slightly larger than the outer diameter of the linear guide rod. The linear guide rod passes through the hole of the adapter block 5122, and the adapter block 5122 can slide along the linear guide rod. The linear guide rod plays a certain guiding role.

[0092] The bearing drive module 21 is connected to the upright frame 11 by the electric cylinder mounting plate 23.

[0093] The second push module 51 has two second linear guide rails 53 on both sides. They are arranged along the axial direction and distributed on both sides of the second linear push assembly 511. The adapter plate 5121 is slidably mounted on the second linear guide rail 53 by a slider. The second linear guide rail 53 provides a certain guiding effect for movement and improves the straightness of movement.

[0094] An assembly equipment for motor rotor end cover assembly includes a motor rotor end cover assembly mechanism. The assembly equipment includes a mounting frame 1, a bearing pushing mechanism 2, an end cover positioning mechanism 3, a first rotor positioning mechanism 4, a second rotor positioning mechanism 5, and a control system 6. The mounting frame 1 includes a stand 11 and a base 12.

[0095] The bearing driving mechanism 2, the second rotor positioning mechanism 5, and the end cover positioning mechanism 3 are respectively installed on the first mounting position 111, the second mounting position 112, and the third mounting position 113 on the upright frame 11;

[0096] like Figure 13 As shown, the first mounting position 111, the second mounting position 112, and the third mounting position 113 are set in order from top to bottom;

[0097] The linear drive assembly 211 of the bearing drive mechanism 2 is fixedly installed on the first mounting position 111, and drives the pressure head 22 to move up and down;

[0098] The second linear push assembly 511 of the second rotor positioning mechanism 5 is fixedly installed on the second mounting position 112, pushing the second positioning module 52 to move up and down. The second positioning module 52 is a top guide rod with the top of the top guide rod facing down. The adapter plate 5121 is installed on the second linear guide rail 53 of the first slide rail mounting position 114 through a slider, and moves up and down along the second linear guide rail 53.

[0099] The end cap positioning mechanism 3 has its end cap pushing module 31 fixedly installed in the third mounting position 113. The mounting plate 33 is mounted on the first linear guide rail 34 of the second slide rail mounting position 115 via a slider and moves up and down along the first linear guide rail 34.

[0100] The first rotor positioning mechanism 4 is mounted on the base 12; the first rotor positioning mechanism 4 is a top module with the top facing upwards.

[0101] The bearing pushing mechanism 2, the second rotor positioning mechanism 5, and the end cover positioning mechanism 3 are all located above the first rotor positioning mechanism 4; the pressure head 22 of the bearing pushing mechanism 2 is located above the plane where the bearing positioning surface of the end cover positioning mechanism 3 is located.

[0102] The positioning centers of the end cap positioning mechanism 3, the first rotor positioning mechanism 4, and the second rotor positioning mechanism 5 are located on the same vertical axis;

[0103] After the pressure head 22 contacts the bearing of the end cover positioned by the end cover positioning module 32 under the drive of the bearing push module 21, the bearing push module 21 and the end cover push module 31 synchronously drive the pressure head 22 and the end cover to move closer to the first rotor positioning mechanism 4.

[0104] The motor rotor end cover assembly equipment includes the following assembly methods:

[0105] The control mechanism on the assembly equipment is in the assembly preparation state; the assembly preparation state means that the bearing pushing mechanism 2, the end cover positioning mechanism 3, and other mechanisms maintain a suitable distance and state so as to transfer the parts onto the mechanism; for example, in the assembly preparation state, the end cover positioning module 32 should be far away from the first rotor positioning mechanism 4 to ensure that there is enough space to place the rotor, and to ensure that after the rotor and end cover are placed and positioned, the rotor and end cover are still a certain distance apart; similarly, in the assembly preparation state, the pressure head 22 and the second positioning module 52 should be located above the end cover positioning module 32 and maintain a certain distance from the end cover positioning module 32 to ensure that there is enough space to place the end cover;

[0106] The end cap is gripped and placed onto the end cap positioning mechanism 3 on the assembly equipment, and the end cap is positioned.

[0107] The rotor is gripped and placed onto the first rotor positioning mechanism 4 on the assembly equipment, and the rotor is positioned.

[0108] The second positioning module 52 is controlled to move in the direction of the rotor and dock with the rotor assembly end positioning structure B1, and together with the first rotor positioning mechanism 4, the rotor is fixed.

[0109] The control end cover pushing module 31 drives the end cover positioning module 32 to move, adjusting the distance between the end cover and the rotor to a suitable assembly state;

[0110] When the end cover bearing centerline is in the assembly state, it is coaxial with the rotor centerline and the distance between them is appropriate. Considering the assembly error of the assembled equipment, it is generally approximately coaxial. Figure 14 The diagram illustrates a state where the end cap 71 and the rotor 72 are ready for assembly.

[0111] The bearing push module 21 controls the pressure head 22 to move towards the bearing and stops after contacting the inner ring of the bearing; since the bearing push mechanism 2 is equipped with a pressure sensor, the pressing position can be precisely controlled through pressure feedback.

[0112] The clamping block of the control end cap positioning mechanism 3 is released and maintains a certain gap with the side positioning surface A2. The horizontal supporting surface of the clamping block supports the lower surface A1 of the end cap, so that the end cap maintains a certain floating within a limited range.

[0113] The control end cover positioning module 32 and the pressure head 22 move towards the rotor simultaneously. After the end cover bearing and the rotor assembly end positioning structure B1 come into contact, the movement continues until the bearing and the end cover are in place and then the movement stops. The set pressing position distance and pressure feedback are used to determine whether the pressing is in place. After the pressing is in place, the mechanism stops moving, forming the assembled end cover rotor assembly.

[0114] Control end cap positioning module 32 and pressure head 22 to loosen the end cap;

[0115] Control the second positioning module 52 to move in the opposite direction to return to the designated position and disengage from the second assembled component;

[0116] The clamping end cap rotor assembly is removed from the assembly equipment, and the process ends.

[0117] In one embodiment, the rotor assembly end positioning structure B1 and the rotor non-assembly end positioning structure B2 are as follows: Figure 15 As shown, a dummy shaft is installed at the assembly end and the non-assembly end of the rotor. One end of the dummy shaft is fitted onto the rotor end, and the other end is provided with a positioning hole. The structure and the center structure used by the rotor positioning mechanism can be adapted and fit together. The function of the dummy shaft is to prevent the rotor positioning mechanism from directly contacting the positioning rotor and causing rotor damage.

[0118] The bearing pushing mechanism 2 is equipped with a pressure sensor, which can sense the reverse force when the pressure head contacts the bearing. The sensor determines whether the rotor bearing is properly pressed in during assembly by using the following method:

[0119] Step a1: When the pressure head 22 contacts the inner ring of the bearing, push the bearing to a preset moving distance h that is in place with the rotating shaft. The preset distance h can be set according to the distance between the pressure head 22 and the rotor placement position, as well as the model of the end cover and the rotor.

[0120] Step a2: Control the pressure head 22 to push the bearing to move, moving synchronously with the end cover in the assembly direction towards the rotor;

[0121] When the moving distance D < h - Tm, the pressure feedback value P of the pressure head obtained by the control system is greater than or equal to the preset pressure Pm, then the assembly stops; it is considered that the bearing and shaft are misaligned, an early warning is issued and manual intervention is required; Tm is the margin provided for the machining accuracy error of the assembly equipment used in the assembly process, which can be set to the machining accuracy of the assembly equipment plus a threshold.

[0122] When the moving distance D ≥ h - Tm, the obtained pressure head feedback value P ≥ preset pressure Pm, then it is determined that the bearing has moved into position, and the bearing and end cover are controlled to stop moving.

[0123] When h-Tm≤moving distance D<h, the obtained pressure feedback value P≥preset pressure Pm, then it is determined that the bearing has moved into place, and the bearing and end cover are controlled to stop moving.

[0124] When the moving distance D=h, if the obtained pressure feedback value P is always less than the preset pressure Pm, then continue moving the bearing and end cover until the obtained pressure feedback value P> the preset pressure, which means that the press-fit is in place, and stop moving.

[0125] Misalignment during assembly can occur in two ways: one is that the end cap and rotor are not aligned concentrically in the assembly state; the other is that although they have been aligned concentrically in the assembly state, they do not move in the preset assembly direction during the moving process. Both of these situations may be caused by mechanical errors after the assembly equipment has been used for a long time.

[0126] The pressure feedback value of the pressure head can be obtained through a pressure sensor. The pressure sensor can be set at the connection between the pressure head 22 and the push actuator 21, or at other locations that can effectively obtain the reverse pressure value of the pressure surface when the pressure surface of the pressure head contacts the inner ring of the bearing.

[0127] like Figure 16 As shown, a first pressure sensor 82 is provided between the first rotor positioning mechanism 4 and the mounting platform 13 on the base 12. In one embodiment, the force range is between 100KG and 7T. When the rotor is transferred by an actuator such as a robotic arm and placed on the first rotor positioning mechanism 4, the pressure sensor can accurately sense how much force there is and then adjust it to a stable value according to the actual situation. The more the rotor is pressed down, the greater the reaction force on the top, and the greater the pressure displayed on the screen. After reaching the predetermined value, the downward movement stops to ensure that the rotor is fixed and to protect the rotor from deformation.

[0128] like Figure 17As shown, a second pressure sensor 83 is installed on the second rotor positioning mechanism 5. In one embodiment, it is specifically installed between the bottom of the adapter block 5122 and the second positioning module 52. The force range of the pressure sensor is also between 100KG and 7T. After the robotic arm stably places the rotor on the first rotor positioning mechanism 4, the second pushing module 51 drives the second positioning module 52 to press down. When it contacts the rotor assembly end, the pressure sensor will sense the force. Then, according to the actual situation of the cooperation between the first rotor positioning mechanism 4 and the second rotor positioning mechanism 5, it will adjust to a stable value to clamp the rotor. After reaching the predetermined value, the movement will stop, ensuring that the rotor is fixed while protecting the rotor from deformation.

[0129] The motor rotor end cover assembly mechanism provided by this invention consists of a bearing pushing mechanism, an end cover positioning mechanism, and a rotor positioning mechanism. The rotor positioning mechanism positions the rotor center, and the end cover positioning mechanism positions the end cover center and drives the end cover to move towards the rotor. When the end cover bearing contacts and assembles with the rotor shaft, the bearing pushing mechanism drives the pressure head to apply pressure to the rotor bearing to achieve assembly. This avoids different parts of the end cover being subjected to forces in different directions, reduces the risk of end cover structural deformation or damage, and at the same time counteracts the axial force generated during assembly, solving the problem of excessive axial force damaging the bearing.

[0130] Furthermore, multiple positioning mechanisms, including the first and second rotor positioning mechanisms, simultaneously contact and center the rotor from both the non-assembly and assembly ends, ensuring that no eccentricity occurs during rotor reassembly and thus improving the stability of the assembly process. A custom-designed end cap clamp holds the outer surface of the end cap from both sides to center its position and then releases it. The end cap is supported only by the clamping block support surface, providing a certain degree of floating for the end cap during assembly and preventing the clamping force from locking the center of the end cap. This provides an adaptive correction function when the center deviates. Through the integrated design of the rotor positioning mechanism and the bearing driving mechanism, the overall layout of the assembly equipment is optimized, making the structure more compact.

[0131] Furthermore, it should be understood that the above embodiments only illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A motor rotor end cover assembly mechanism, characterized in that, It consists of a mounting frame (1), a bearing pushing mechanism (2), an end cap positioning mechanism (3), and a first rotor positioning mechanism (4); the bearing pushing mechanism (2), the end cap positioning mechanism (3), and the first rotor positioning mechanism (4) are mounted on the mounting frame (1); the bearing pushing mechanism (2) consists of a bearing pushing module (21) and a pressure head (22); the bearing pushing module (21) is fixedly mounted on the mounting frame (1), and the pressure head (22) is used to contact the upper surface of the inner ring of the bearing. The pressure head (22) is connected to the bearing pushing module (21) and moves under the drive of the bearing pushing module (21); the end cap positioning mechanism (3) consists of an end cap pushing module (31) and an end cap positioning module (32); the end cap positioning module (32) is used to place the end cap and position the center of the end cap. The end cap pushing module (31) is fixedly mounted on the mounting frame (1), and the end cap positioning module (32) and the end cap pushing module (31) are connected. The connection is made by moving the end cap push module (31) under the drive of the end cap push module (31). The end cap push module (31) drives the end cap positioned by the end cap positioning module (32) to move to the assembly position and assemble with the rotor positioned by the first rotor positioning mechanism (4), or drives the end cap positioning module (32) away from the assembly position. The first rotor positioning mechanism (4) is used to position the rotor center. The bearing push mechanism (2) and the end cap positioning mechanism (3) are located on the same side of the first rotor positioning mechanism (4). The pressure head (22) and the first rotor positioning mechanism (4) are respectively located on opposite sides of the plane where the bearing positioning surface of the end cap positioning mechanism (3) is located. The positioning center of the end cap positioning mechanism (3) and the positioning center of the first rotor positioning mechanism (4) are located on the same axis. The bearing push module (21) drives the pressure head (22) to move along the axis direction. The end cap push module (31) drives the end cap positioning module (32) to move along the axis direction. The motor rotor end cover assembly mechanism further includes: a second rotor positioning mechanism (5); the second rotor positioning mechanism (5) is mounted on the mounting frame (1) and consists of a second push module (51) and a second positioning module (52); the second positioning module (52) is used to contact the rotor assembly end positioning structure B1 and position the rotor center; the second push module (51) is mounted on the mounting frame (1), and the second positioning module (52) is mounted on the second push module (51) and moves along the axis direction under the drive of the second push module (51); the diameter of the second positioning module (52) is smaller than the bearing inner diameter and is used to pass through the inner ring of the end cover bearing to dock with or retract the rotor assembly end positioning structure B1; the positioning center of the second positioning module (52) is located on the axis.

2. The motor rotor end cover assembly mechanism as described in claim 1, characterized in that, The end cap positioning module (32) consists of a lateral pushing component (321) and N sets of gripper components (322), where N≥2. The lateral pushing component (321) is mounted on the end cap pushing module (31) and moves under the drive of the end cap pushing module (31). The gripper components (322) are mounted on the lateral pushing component (321) via a base plate (323) and move closer to or away from the axis under the drive of the lateral pushing component (321).

3. The motor rotor end cover assembly mechanism as described in claim 2, characterized in that, The gripper assembly (322) is provided with a gripper block (32221). The horizontal support surface of the gripper block (32221) is used to support the lower surface A1 of the end cap. The side gripping surface of the gripper block (32221) contacts and grips the side positioning surface A2 of the end cap. After N sets of gripper blocks (32221) contact and grip the side positioning surface A2 of the end cap, the transverse pushing assembly (321) controls the gripper blocks (32221) to move away from each other. The end cap supports the lower surface A1 of the end cap through the horizontal support surface of the gripper block (32221).

4. The motor rotor end cover assembly mechanism as described in claim 1, characterized in that, The first rotor positioning mechanism (4) is a top module, the top of the top module faces the direction of the bearing pushing mechanism (2), the center of the top is located on the axis, and the top module fits the structure of the rotor non-assembly end positioning structure B2; the second positioning module (52) is a top guide rod, the top guide rod is set along the axis, the top of the top guide rod faces the first rotor positioning mechanism (4), the center of the top of the top guide rod is located on the axis, and the top guide rod fits the structure of the rotor assembly end positioning structure B1.

5. The motor rotor end cover assembly mechanism as described in claim 1, characterized in that, The pressure head (22) is a sleeve structure; the inner diameter of the sleeve structure is larger than the diameter of the second positioning module (52); the center of the pressure surface of the pressure head (22) is located on the axis.

6. The motor rotor end cover assembly mechanism as described in claim 5, characterized in that, The bearing push module (21) consists of a linear push assembly (211) and a guide assembly (212); the linear push assembly (211) is fixedly installed on the mounting frame (1), and the guide assembly (212) is connected to the pressure head (22) through a first mounting plate (2121) at one end and a second mounting plate (2122) at the other end, and moves under the drive of the linear push assembly (211); the second push module (51) consists of a second linear push assembly (511) and a transition module (512), the second linear push assembly (511) is fixedly installed on the mounting frame (1), and the transition module (512) is fixedly installed on the mounting frame (1). The adapter plate (5121) of 512) is installed on the second linear push assembly (511). The adapter block (5122) is connected to the adapter plate (5121) on the side and connected to the second positioning module (52) on the bottom. The adapter module (512) moves under the drive of the second linear push assembly (511). The adapter block (5122) is located between the first mounting plate (2121) and the second mounting plate (2122). The second positioning module (52) passes through the hole on the first mounting plate (2121) and the inside of the pressure head (22) in sequence. Under the drive of the second push module (51), it extends out of the pressure surface of the pressure head (22) or retracts.

7. The motor rotor end cover assembly mechanism as described in claim 6, characterized in that, The connector (2123) of the guide assembly (212) is a linear guide rod, which is arranged along the axial direction. The adapter block (5122) has a hole, and the linear guide rod passes through the hole of the adapter block (5122).

8. A motor rotor end cover assembly assembly equipment, characterized in that, The motor rotor end cover assembly mechanism according to any one of claims 1 to 7 is further comprising a control system (6), the mounting frame (1) comprising a stand (11) and a base (12); the bearing pushing mechanism (2) and the end cover positioning mechanism (3) are mounted on the stand (11); the first rotor positioning mechanism (4) is mounted on the base (12); the bearing pushing mechanism (2) and the end cover positioning mechanism (3) are located above the first rotor positioning mechanism (4); the positioning centers of the end cover positioning mechanism (3) and the first rotor positioning mechanism (4) are located on the same vertical line; after the pressure head (22) contacts the bearing of the end cover located at the positioning center of the end cover by the bearing pushing module (21), the bearing pushing module (21) and the end cover pushing module (31) synchronously drive the pressure head (22) and the end cover to move toward the first rotor positioning mechanism (4); The motor rotor end cover assembly equipment includes the following assembly method: The mechanism on the assembled equipment is in the assembly preparation state. The end cap is grasped and placed on the end cap positioning mechanism (3) to position the end cap; The rotor is grasped and placed on the first rotor positioning mechanism (4) to position the rotor; The bearing push module (21) is controlled to drive the pressure head (22) to move towards the bearing and stop moving after contacting the inner ring of the bearing; The end cap positioning module (32) is released, and the end cap remains within a limited floating range; The end cap positioning module (32) and the pressure head (22) are controlled to move simultaneously toward the rotor. After the inner ring of the end cap bearing contacts the rotor, they continue to move until the bearing and end cap are in place to form the end cap rotor assembly and then the movement stops. Control the end cap positioning module (32) and the pressure head (22) to release the end cap; The clamping end cap rotor assembly is removed from the assembly equipment, and the process ends.

9. The motor rotor end cover assembly equipment as described in claim 8, characterized in that, Pressure sensors are respectively provided on the first rotor positioning mechanism (4), the bearing pushing mechanism (2), and the second rotor positioning mechanism (5).

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