Motor rotor end cover assembling mechanism and assembling equipment applying same

Abstract

The invention provides a motor rotor end cover assembling mechanism and assembling equipment applying the motor rotor end cover assembling mechanism. The motor rotor end cover assembling mechanism is composed of an installation frame, a bearing pushing mechanism, an end cover positioning mechanism and a first rotor positioning mechanism. The bearing pushing mechanism is composed of a bearing pushing module and a pressing head. The pressing head is used for making contact with the upper surface of a bearing inner ring and is driven by the bearing pushing module to move. The first rotor positioning mechanism is used for positioning the rotor center; the end cover positioning mechanism is composed of an end cover pushing module and an end cover positioning module, and the end cover positioning module is used for placing an end cover and positioning the center of the end cover and is driven by the end cover pushing module to move. According to the mechanism and the equipment provided by the invention, when the end cover bearing and the rotor rotating shaft are contacted and assembled, the bearing pushing mechanism is utilized to drive the pressure head to apply pressure to the rotor bearing so as to realize assembly of the end cover and the rotor, different parts of the end cover are prevented from being subjected to forces in different directions, and the risk of structural deformation or damage of the end cover is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor assembly, in particular to a motor rotor end cover assembly mechanism and an assembly equipment applying the same. BACKGROUND

[0002] In the automatic assembly process of the end cover rotor, the end cover is clamped by the automatic mechanism, the end cover is pressed down to contact with the rotor by the pressing mechanism, until the assembly is completed; for example, the automatic assembly device for the permanent magnet synchronous motor rotor and end cover disclosed in patent document CN 107317440A contains a rotor grabbing assembly and an end cover grabbing assembly, the rotor is clamped by the rotor grabber, the end cover is grabbed by the end cover grabber, and the end cover is pressed down to complete the clamping of the end cover under the driving of the lower pressing rod assembly, so as to realize the assembly.

[0003] In the assembly process, the end cover bearing needs to be interference fitted with the rotor shaft, and a large pressure needs to be applied to the end cover to realize the assembly. At the same time, in the end cover rotor assembly process, the direct contact part is the inner ring of the bearing and the rotor shaft, and the axial force will be generated on the inner ring of the bearing during the assembly, and the different parts of the end cover will be subjected to different forces, which may cause the deformation or damage of the end cover structure. On the other hand, the excessive axial force may also cause the damage of the bearing, affect the assembly effect and the performance of the assembled components. SUMMARY

[0004] The present application aims to solve the above problems, and provides a motor rotor end cover assembly mechanism and an assembly equipment applying the same, which reduces the risk of deformation or damage of the end cover structure, and can offset the axial force generated during the assembly and avoid the damage of the bearing.

[0005] The application solves the problem, and the technical scheme is as follows: a motor rotor end cover combined assembly mechanism is composed of 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 is composed of a bearing pushing module and a pressing head; the bearing pushing module is fixedly mounted on the mounting frame, and the pressing head is used for contacting the upper surface of the inner ring of the bearing; the pressing head is connected with the bearing pushing module and moves under the driving of the bearing pushing module; the end cover positioning mechanism is composed of an end cover pushing module and an end cover positioning module; the end cover positioning module is used for placing and positioning the center of the end cover; the end cover pushing module is fixedly mounted on the mounting frame; the end cover positioning module is connected with the end cover pushing module and moves under the driving of the end cover pushing module; the end cover pushing module drives the end cover positioned by the end cover positioning module to move to the assembly position and is assembled with the rotor positioned by the first rotor positioning mechanism or drives the end cover positioning module to move away from the assembly position; the first rotor positioning mechanism is used for positioning the center of the rotor; the bearing pushing mechanism and the end cover positioning mechanism are located on the same side of the first rotor positioning mechanism; the pressing head and the first rotor positioning mechanism are respectively arranged on the opposite sides of the plane where the bearing positioning surface of the end cover positioning mechanism is located; the positioning center of the end cover positioning mechanism and the positioning center of the first rotor positioning mechanism are located on the same axis; the bearing pushing module drives the pressing head to move along the axis; and the end cover pushing module drives the end cover positioning module to move along the axis.

[0006] The end cover positioning module is composed of a transverse pushing assembly and N sets of jaw assemblies, N≥2, the transverse pushing assembly is mounted on the end cover pushing module and moves under the driving of the end cover pushing module; the jaw assemblies are mounted on the transverse pushing assembly through the bottom plate and approach or move away from the axis under the driving of the transverse pushing assembly.

[0007] The jaw assemblies are provided with clamping blocks, the horizontal supporting surface of the clamping blocks is used for supporting the lower surface A1 of the end cover, and the side clamping surface of the clamping blocks contacts and clamps the side positioning surface A2 of the end cover; the side clamping surfaces of N sets of the clamping blocks contact and clamp the side positioning surface A2 of the end cover, the center of the end cover is positioned, the transverse pushing assembly controls the clamping blocks to move away from each other, and the end cover is supported by the horizontal supporting surface of the clamping blocks to support the lower surface A1 of the end cover.

[0008] The motor rotor end cover combination mechanism further comprises a second rotor positioning mechanism; the second rotor positioning mechanism is installed on the mounting frame and comprises a second pushing module and a second positioning module; the second positioning module is used for contacting a rotor assembly end positioning structure B1 and positioning the rotor center; the second pushing module is installed on the mounting frame, and the second positioning module is installed on the second pushing module and moves along the axial direction under the driving of the second pushing module; the diameter of the second positioning module is smaller than the inner diameter of the bearing, and the second positioning module is used for passing through the inner ring of the end cover bearing and being in butt joint or being withdrawn with the rotor assembly end positioning structure B1; the positioning center of the second positioning module is located on the axis.

[0009] The first rotor positioning mechanism is a center module, the center of the center module is located on the axis, and the structure of the center module is matched with a rotor non-assembly end positioning structure B2; the second positioning module is a center guide rod, the center guide rod is arranged along the axial direction, the center of the center guide rod is located on the axis, and the structure of the center guide rod is matched with the rotor assembly end positioning structure B1.

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

[0011] The bearing pushing module comprises a linear pushing assembly and a guide assembly; the linear pushing assembly is fixedly installed on the mounting frame, the guide assembly is connected with the pressure head through a first mounting plate at one end and connected with the linear pushing assembly through a second mounting plate at the other end and moves under the driving of the linear pushing assembly; the second pushing module comprises a second linear pushing assembly and an adapter module; the second linear pushing assembly is fixedly installed on the mounting frame; the adapter plate of the adapter module is installed on the second linear pushing assembly; the adapter block is connected with the adapter plate at the side surface and connected with the second positioning module at the bottom; the adapter module moves under the driving of the second linear pushing assembly; the adapter block is located between the first mounting plate and the second mounting plate; and the second positioning module passes through the hole position 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 is withdrawn under the driving of the second pushing module.

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

[0013] The motor rotor end cover combined assembly equipment applies the motor rotor end cover combined assembly mechanism, and the motor rotor end cover combined assembly equipment further comprises a control system, the mounting frame comprises a stand and a base; the bearing pushing mechanism and the end cover positioning mechanism are mounted on the stand; the 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 at the positioning center of the end cover positioning mechanism under the driving 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; The motor rotor end cover combined assembly equipment comprises the following combined assembly method: The mechanisms on the combined assembly equipment are controlled to be in the preparation state for assembly; The end cover is grabbed and placed on the end cover positioning mechanism to position the end cover; The rotor is grabbed and placed on the first rotor positioning mechanism to position the rotor; The bearing pushing module is controlled to drive the pressure head to move towards the bearing and stop moving after contacting the inner ring of the bearing; The end cover positioning module is controlled to be loosened, and the end cover is kept within a limited floating range; The end cover positioning module and the pressure head are controlled to move towards the rotor at the same time, and continue to move after the end cover bearing inner ring and the rotor contact, until the bearing and the end cover move to the position to form an end cover rotor assembly and stop moving; The end cover positioning module and the pressure head are controlled to loosen the end cover; The end cover rotor assembly is clamped and moved away from the combined assembly equipment, and the process ends.

[0014] Pressure sensors are arranged on the first rotor positioning mechanism, the bearing pushing mechanism and the second rotor positioning mechanism respectively.

[0015] The motor rotor end cover combined assembly mechanism provided by the application comprises a bearing pushing mechanism, an end cover positioning mechanism and a rotor positioning mechanism, the rotor center is positioned by the rotor positioning mechanism, the end cover center is positioned by the end cover positioning mechanism and the end cover is driven to move towards the rotor, the end cover bearing contacts and combines with the rotor shaft by using the bearing pushing mechanism to drive the pressure head to apply pressure to the rotor bearing to realize the combination, the different parts of the end cover are prevented from being subjected to forces in different directions, the risk of deformation or damage of the end cover structure is reduced, the axial force generated during the combination is offset, and the problem that the excessive axial force damages the bearing is solved.

[0016] Further, the first rotor positioning mechanism, the second rotor positioning mechanism and various positioning mechanisms simultaneously contact and center the rotor from the non-assembly end and the assembly end, ensuring that the rotor does not deviate during the assembly process, thereby improving the stability of the assembly process; the custom end cover clamp is designed to clamp the outer surface of the end cover from both sides to center the end cover position, then loosen, the end cover is only supported by the support surface of the clamp block, which provides a certain floating for the end cover during the assembly process, avoids locking the center of the end cover by clamping force, and provides self-adaptive correction function when the center deviates; and through the integrated design of the rotor positioning mechanism and the bearing pushing mechanism, the overall layout of the assembly equipment is optimized, and the structure is more compact. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate an embodiment consistent with the present application and, together with the description, serve to explain the principles of the application.

[0018] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a structural schematic diagram of the bearing pushing mechanism 2 in the present application; Figure 3 is a structural schematic diagram of the end cover positioning mechanism 3 in the present application; Figure 4 is a structural schematic diagram of the end cover positioning module 32 in an embodiment of the present application; Figure 5 is a structural schematic diagram of the clamping jaw assembly 322 in an embodiment of the present application; Figure 6 is a structural schematic diagram of the clamping jaw 3222 in an embodiment of the present application; Figure 7 is a structural schematic diagram of the end cover in the present application; Figure 8 is a structural schematic diagram of the second rotor positioning mechanism 5 in the present application; Figure 9 is a structural schematic diagram of the pressure head 22 in an embodiment of the present application; Figure 10 is a structural schematic diagram of the bearing pushing module 21 in an embodiment of the present application; Figure 11 is a structural schematic diagram of the second pushing module 51 in an embodiment of the present application; Figure 12 is a structural schematic diagram of the integrated structure of the bearing pushing mechanism 2 and the second rotor positioning mechanism 5 in an embodiment of the present application; Figure 13 is a structural schematic diagram of the mounting rack 1 in an embodiment of the present application; Figure 14 is a schematic diagram of the end cover and the rotor in an assembly state in an embodiment of the present application; Figure 15 is a schematic diagram of the rotor and dummy shaft in the present invention; Figure 16 Schematic diagram of the position of the first pressure sensor 82 in one embodiment of the present invention; Figure 17 FIG. 8 is a schematic diagram of the position of the second pressure sensor 83 in one embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] 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 installed on the mounting frame 1; Bearing push 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 mounted on the mounting frame 1, and the pressure head 22 is used to contact the upper surface of the bearing inner ring. When the rotor and stator are in a state to be assembled, the side of the bearing close to the rotor is the lower surface, and the side away from the rotor 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; End cap positioning mechanism 3 as shown Figure 3 As shown, it is composed of an end cover pushing module 31 and an end cover positioning module 32; the end cover positioning module 32 is used to place the end cover and locate the center of the end cover. The end cover pushing module 31 is fixedly mounted on the mounting frame 1, and the end cover positioning module 32 is connected to the end cover pushing module 31 through the mounting plate 33. The end cover pushing module 31 moves driven by the end cover pushing module 31. The end cover positioning module 32 moves the end cover positioned by the end cover pushing module 31 to the assembly position to be assembled with the rotor positioned by the first rotor positioning mechanism 4, or drives the end cover positioning module 32 away from the assembly position. In one embodiment, the end cap pushing module 31 is a linear module with a motor. The end cap positioning module 32 is mounted on the slider of the linear module through a mounting plate 33 and moves driven by the end cap pushing module 31 .

[0021] A first linear guide rail 34 is provided on each side of the end cover pushing module 31. The first linear guide rail 34 is fixed on the mounting frame 1 and arranged along the axial direction. The end cover positioning module 32 is installed 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 cover positioning module 32, thereby improving the straightness of the movement.

[0022] The first rotor positioning mechanism 4 is used to locate the rotor center; The end cap positioning module 32 is used to locate the center of the end cap; The bearing pushing mechanism 2 and the end cover 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 arranged 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 arranged above the plane where the bearing positioning surface is located. The positioning centers of the end cover positioning mechanism 3 and the first rotor positioning mechanism 4 correspond to each other and are located on the same axis. The center lines of the end cover positioned by the end cover positioning mechanism 3 and the rotor positioned by the first rotor positioning mechanism 4 are coaxial. The bearing pushing module 21 and the end cover pushing module 31 respectively drive the pressing head 22 and the end cover positioning module 32 to move along the axial direction.

[0023] Within the movement 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. Also, driven by the end cover pushing module 31, the end cover positioning module 32 can move toward the first rotor positioning mechanism 4 to the assembly position, so that the end cover bearing positioned by the end cover positioning module 32 contacts the rotor assembly end and is assembled in place. Driven by the bearing pushing module 21 , the pressing 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 .

[0024] Within the moving range of the bearing pushing module 21 , the pressing head 22 can always maintain a certain distance from the plane where the bearing positioning surface of the end cover positioning mechanism 3 is located or contact the upper surface of the bearing.

[0025] End cap positioning module 32 as Figure 4 As shown, the end cover positioning module 32 consists of a lateral pushing component 321 and N groups of clamping jaw components 322, N ≥ 2, the lateral pushing component 321 is installed on the end cover pushing module 31 through the mounting plate 33, and moves under the drive of the end cover pushing module 31; the N groups of clamping jaw components 322 are installed on the lateral pushing component 321 through the 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 in a direction perpendicular to the axis and distributed on both sides of the end cover pushing module 31, and the lateral linear guide rails 324 provide a certain guiding effect for the movement of the clamping jaw component 322, thereby improving the straightness of the movement.

[0026] In one embodiment, the number of the clamping jaw assemblies 322 is two, which are symmetrically distributed on both sides of the axis.

[0027] The center line of the end cap positioning module 32 is the positioning center of the end cap positioning module 32 .

[0028] The jaw assembly 322 is as follows Figure 5 As shown, it includes a clamping jaw mounting plate 3221 and a clamping jaw 3222. The clamping jaw 3222 is provided with a clamping block 32221. The horizontal supporting surface of the clamping block 32221 is used to support the lower surface A1 of the end cover. The side clamping surface of the clamping block 32221 contacts and clamps the side positioning surface A2 of the end cover. The side clamping surfaces of the N group of clamps 32221 contact and clamp the side positioning surface A2 of the end cover. After positioning the center of the end cover, the horizontal pushing component 321 controls the clamps 32221 to move away from each other to loosen the margin and maintain a gap with the side positioning surface A2. The end cover is supported by the horizontal supporting surface of the clamp 32221 on the lower surface A1 of the end cover.

[0029] In one embodiment, the clamping blocks approach each other, contact and clamp the end cover, the side clamping surfaces of the clamping blocks clamp the side positioning surfaces A2 of the end cover, and the horizontal supporting surfaces of the clamping blocks support the lower surface A1 of the end cover, thereby positioning the end cover; after positioning the end cover, the clamping blocks move away from each other and loosen a certain margin, and only the horizontal supporting surfaces of the clamping blocks support the lower surface A1 of the end cover, so that only the horizontal supporting surfaces of the clamping blocks support the end cover, and the horizontal clamping force disappears, providing a certain amount of floating for the end cover during the assembly process; conversely, if the clamping jaw assembly locks the center of the end cover through the clamping force of the clamping surface of the clamping block, and does not provide floating for the end cover, it cannot correct the deviation when the center of the end cover deviates, and the end cover may be stuck during the assembly process.

[0030] Since the end cover needs to be supported by the horizontal supporting surface of the clamping block, the clamping jaw assembly of this structure should be used in vertical assembly, that is, the end cover and rotor are arranged up and down. 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 contacts the rotor shaft and the two are pressed into place to form an end cover rotor assembly.

[0031] In one embodiment, Figure 6 As shown, the clamping jaw 3222 is provided with two clamping blocks 32221, the angle between the two clamping blocks 32221 is less than 180 degrees, and the angle and distribution of the clamping blocks are adapted to the shape of the positioning surface on the outer surface of the end cover; the clamping block is rectangular, the clamping surface of the clamping block is the inner vertical surface of the clamping block, and the upper surface of the clamping block is the supporting surface for supporting the end cover, as shown in FIG. Figure 7 As shown, the lower surface A1 of the end cover is the lower surface of the flange, and the positioning surface A2 of the end cover is the outer surface of the stop. During the assembly process, the floating range of the end cover is between the distance between the clamping surface of the clamping block and the outer surface of the end cover stop.

[0032] In another embodiment, the clamp block is an L-shaped structure composed of a vertical clamp plate and a horizontal clamp plate, the inner surface of the vertical clamp plate is a clamping surface, the upper surface of the horizontal clamp plate is a supporting surface for supporting the end cover; the lower surface A1 of the end cover is a flange lower surface, the side positioning surface A2 of the end cover is a flange outer surface, the clamping surface of the vertical clamp plate contacts and clamps the side positioning surface A2 of the end cover, and after being loosened, the lower surface A1 of the end cover is only supported by the upper surface of the horizontal clamp plate.

[0033] In one embodiment, the end cover positioning module 32 is composed of a motor and a relative motion screw rod, the motor provides driving, and the screw rod provides the direction of motion; the screw rod is arranged vertically to the axial direction, and a sliding block is arranged on the screw rod to move relatively or away under the driving of the motor.

[0034] The two sets of clamp jaw assemblies 322 are symmetrically installed on different screw rod sliding blocks, and similarly, move relatively or away under the driving of the motor, so as to contact and tighten or loosen the end cover.

[0035] In one embodiment, the motor rotor end cover assembly mechanism further comprises: The second rotor positioning mechanism 5 contacts and positions the rotor from different parts.

[0036] The second rotor positioning mechanism 5 is installed on the mounting frame 1, as shown in Figure 8 The second rotor positioning mechanism 5 is installed on the mounting frame 1, as shown in The second positioning module 52 is installed on the second pushing module 51, and moves along the axial direction under the driving of the second pushing module 51; The diameter of the second positioning module 52 is smaller than the inner diameter of the bearing, which is used to pass through the inner ring of the end cover bearing and dock with the rotor assembly end positioning structure B1 or retract; The positioning center of the second positioning module 52 is located on the axis.

[0037] In one embodiment, the first rotor positioning mechanism 4 is a center module, the center of the center module is located on the axis, and the structure of the center module is matched with the structure of the non-assembly end positioning structure B2 of the rotor.

[0038] In one embodiment, the second positioning module 52 is a center guide rod, the center guide rod is arranged along the axial direction, the center of the center guide rod is located on the axis, and the structure of the center guide rod is matched with the structure of the assembly end positioning structure B1 of the rotor.

[0039] Since the bearing pushing mechanism 2 and the second rotor positioning mechanism 5 both contact the rotor or end cover bearing from above, in order to avoid interference between the two structures and to make the overall structure compact, in one embodiment, the following structural design is adopted: The pressure head 22 is as follows Figure 9 As shown, it 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 pressing surface of the pressing head 22 is located on the axis.

[0040] Bearing push module 21 as Figure 10 As shown, it is composed of a linear push component 211 and a guide component 212; The linear push assembly 211 is fixedly mounted on the mounting frame 1. The guide assembly 212 is connected to the pressure head 22 via a first mounting plate 2121 at one end. The pressure head 22 is mounted on the first mounting plate 2121 via a mounting flange 221. The second mounting plate 2122 at the other end of the guide assembly 212 is connected to the linear push assembly 211 and moves under the drive of the linear push assembly 211. The second push module 51 is as follows Figure 11 As shown, it consists of a second linear driving component 511 and an adapter module 512. The second linear driving component 511 is fixedly mounted on the mounting frame 1. The adapter plate 5121 of the adapter module 512 is mounted on the second linear driving component 511. The adapter block 5122 is connected to the adapter plate 5121 on the side and is connected to the second positioning module 52 on the bottom. The adapter module 512 moves under the drive of the second linear driving component 511.

[0041] 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 holes on the first mounting plate 2121 and the interior of the pressing head 22 in sequence, and is extended from the pressing surface of the pressing head 22 or retracted under the drive of the second pushing module 51 .

[0042] The second pushing module 51 extends out of the pressure head 22 and docks with the rotor assembly, making it easy to observe whether it contacts the rotor assembly.

[0043] In one embodiment, the linear pushing assembly 211 is composed 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 is equipped with a built-in pressure sensor, which can be specifically 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.

[0044] The servo motor encoder on the electric cylinder can obtain the extension distance, thereby knowing the distance that the linear push component 211 drives the pressure head 22 to move.

[0045] When the electric cylinder shaft extends, the connected guide assembly 212 and the pressure head 22 are driven to press down. The pressure head 22 is customized according to different types of bearings, and the position of the pressing surface is the inner ring of the bearing.

[0046] In one embodiment, the second linear pushing assembly 511 is composed of a motor and a lead screw, the motor drives the movement of the lead screw, and a sliding block is arranged on the lead screw and connected with the adapter plate 5121.

[0047] In one embodiment, as shown in Figure 12 The connecting piece 2123 of the guide assembly 212 is a linear guide rod, which is arranged along the axial direction. The adapter block 5122 is provided with 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, which plays a guiding role.

[0048] The bearing pushing module 21 is connected to the stand 11 by the electric cylinder mounting plate 23, The second pushing module 51 is provided with two second linear guide rails 53 on both sides, which are arranged along the axial direction and distributed on both sides of the second linear pushing assembly 511. The adapter plate 5121 is slidably mounted on the second linear guide rail 53 through a sliding block, and the second linear guide rail 53 provides a certain guiding effect for the movement, improving the straightness of the movement.

[0049] A motor rotor end cover assembly comprises a motor rotor end cover assembly mechanism, and the assembly comprises 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 comprises a stand 11 and a base 12. The bearing pushing 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 of the stand 11. As shown in Figure 13 The first mounting position 111, the second mounting position 112, and the third mounting position 113 are sequentially arranged from top to bottom. The linear pushing assembly 211 of the bearing pushing mechanism 2 is fixedly installed on the first mounting position 111, and the pushing pressure head 22 moves up and down. The second linear pushing assembly 511 of the second rotor positioning mechanism 5 is fixedly installed on the second mounting position 112, and the second positioning module 52 moves up and down. The second positioning module 52 is a center guide rod, and the center of the center guide rod faces downward. The adapter plate 5121 is installed on the second linear guide rail 53 of the first slide rail mounting position 114 through a sliding block and moves up and down along the second linear guide rail 53. The end cover pushing module 31 of the end cover positioning mechanism 3 is fixedly installed at the third installation position 113, and the installation plate 33 is installed on the first linear guide rail 34 at the second linear guide rail installation position 115 through a sliding block and moves up and down along the first linear guide rail 34; The first rotor positioning mechanism 4 is installed on the base 12, and the first rotor positioning mechanism 4 is a top center module with the top center facing upwards.

[0050] 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, and the pressing 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. The positioning center of the end cover positioning mechanism 3 and the first rotor positioning mechanism 4 and the second rotor positioning mechanism 5 are located on the same vertical axis. After the pressing head 22 contacts the bearing of the end cover at the positioning center of the end cover positioning module 32 under the driving of the bearing pushing module 21, the bearing pushing module 21 and the end cover pushing module 31 synchronously drive the pressing head 22 and the end cover to move towards the first rotor positioning mechanism 4. The motor rotor end cover assembling equipment comprises the following assembling method: The mechanisms on the assembling equipment are controlled to be in an assembly preparation state, and the assembly preparation state refers to that the bearing pushing mechanism 2, the end cover positioning mechanism 3 and other mechanisms maintain appropriate distances and states so as to transfer components to the mechanisms. The end cover is grabbed and placed on the end cover positioning mechanism 3 of the assembling equipment, and the end cover is positioned. The rotor is grabbed and placed on the first rotor positioning mechanism 4 of the assembling equipment, and the rotor is positioned. The second positioning module 52 is controlled to move towards the rotor and is docked with the rotor assembly end positioning structure B1, and the first rotor positioning mechanism 4 is combined to fix the rotor. The end cover pushing module 31 is controlled to drive the end cover positioning module 32 to move, and the distance between the end cover and the rotor is adjusted to an appropriate assembly state. In the assembly state, the center line of the end cover bearing is coaxial with the center line of the rotor and is appropriately spaced, and the coaxial state is generally approximate due to the assembly error of the assembling equipment and other reasons. Figure 14 The assembly state of an end cover 71 and a rotor 72 is shown, The control bearing pushing module 21 drives the pressure head 22 to move towards the bearing and stop after contacting the inner ring of the bearing; since the bearing pushing mechanism 2 is provided with a pressure sensor, the lower position can be accurately controlled through pressure feedback; The control end cover positioning mechanism 3 releases the clamping block and keeps a certain gap with the side positioning surface A2, and the lower surface A1 of the end cover is supported by the horizontal supporting surface of the clamping block, so that the end cover keeps a certain floating within the limited range; The control end cover positioning module 32 moves towards the rotor together with the pressure head 22, continues to move after contacting the end cover bearing and the rotor assembly end positioning structure B1, and stops moving after the bearing and the end cover are moved into position, whether the press-fitting is in position is judged through the set lower position distance and pressure feedback, the mechanism stops moving after the press-fitting is in position, and the assembled end cover rotor assembly is formed; The control end cover positioning module 32 and the pressure head 22 release the end cover; The control second positioning module 52 moves in the opposite direction to the return specified position and is separated from the second assembly; The clamped end cover rotor assembly is moved away from the assembly equipment, and the process is ended.

[0051] In one embodiment, the rotor assembly end positioning structure B1 and the rotor non-assembly end positioning structure B2 are as shown in Figure 15 The false shaft is sleeved on one end of the rotor end and is provided with a positioning hole on the other end, and the structure can be adapted and matched with the center structure of the rotor positioning mechanism; the false shaft prevents the rotor positioning mechanism from directly contacting and positioning the rotor to cause damage to the rotor.

[0052] The bearing pushing mechanism 2 is provided with a pressure sensor, which can sense the reverse force received by the pressure head when contacting the bearing, and whether the rotor bearing assembly is in position during the assembly process is judged by the following method: Step a1: the bearing is pushed to a preset moving distance h from the assembly position of the rotor shaft when the pressure head 22 contacts the inner ring of the bearing; the preset distance h can be set according to the distance between the pressure head 22 and the rotor placement position and the type of the end cover and the rotor; Step a2: control the pressure head 22 to push the bearing to move and move synchronously with the end cover in the assembly direction towards the rotor; When the moving distance D < h-Tm, the pressure head pressure feedback value P obtained by the control system is greater than or equal to the preset pressure Pm, and the assembly is stopped; it is considered that the bearing and the rotor shaft are misaligned, a warning is issued, and manual intervention is required; Tm is a margin provided for the machining precision error of the assembly equipment used in the assembly process, which can be set as the machining precision of the assembly equipment plus a threshold value; When the moving distance D ≥ h-Tm, the pressure head pressure feedback value P obtained is greater than or equal to the preset pressure Pm, and the bearing is judged to be in position, and the bearing and the end cover stop moving: When h-Tm≤moving distance D<h, the pressure feedback value P obtained is greater than or equal to the 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; When the moving distance D=h, the pressure feedback value P obtained is always less than the preset pressure Pm, then the bearing and end cover continue to be moved until the pressure feedback value P obtained is greater than the preset pressure, indicating that the press-fit is in place and the movement stops.

[0053] There are two situations in which assembly misalignment occurs: one is that the end cover and the rotor are not adjusted to be concentric when in the state to be assembled; the other is that although they have been adjusted to be concentric when in the state to be assembled, they do not move in the preset assembly direction during the movement. The above situations may be caused by mechanical errors after long-term use of the assembly equipment.

[0054] 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 pushing actuator 21, or at other positions that can effectively obtain the reverse pressure value exerted on the pressure surface when the pressure surface of the pressure head contacts the inner ring of the bearing.

[0055] 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 100 kg and 7 tons. 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 the force and then adjust it to a stable value based on the actual situation. The more the rotor is pressed downward, the greater the reaction force on the top, and the pressure displayed on the screen will become greater. After reaching the predetermined value, the downward movement stops to ensure that the rotor is fixed and protected from deformation.

[0056] like Figure 17 As 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. When 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 downward. When it contacts the rotor assembly end, the pressure sensor will sense the force and then adjust it to a stable value based on the actual situation of the first rotor positioning mechanism 4 and the second rotor positioning mechanism 5 to clamp the rotor. The movement stops after reaching the predetermined value, ensuring that the rotor is fixed while protecting the rotor from deformation.

[0057] The motor rotor end cover combined assembly mechanism is composed of a bearing pushing mechanism, an end cover positioning mechanism and a rotor positioning mechanism, the rotor center is positioned by the rotor positioning mechanism, the end cover center is positioned by the end cover positioning mechanism and the end cover is driven to move towards the rotor, the end cover bearing contacts and combines with the rotor shaft, the bearing pushing mechanism is used to drive the pressure head to apply pressure to the rotor bearing to realize the combination, different parts of the end cover are prevented from being subjected to forces in different directions, the risk of deformation or damage of the end cover structure is reduced, the axial force generated in the combination is offset, and the problem that an excessive axial force damages the bearing is solved.

[0058] Further, the first rotor positioning mechanism and the second rotor positioning mechanism simultaneously contact and center the rotor from the non-assembly end and the assembly end, the rotor is prevented from being eccentric during the combination, and the stability of the combination process is improved; the custom end cover clamp is designed to clamp the outer surface of the end cover to center the end cover position, then the clamp is loosened, the end cover is only supported by the supporting surface of the clamp block, a certain floating of the end cover during the combination is provided, the clamping force is prevented from locking the center of the end cover, the self-adaptive correction function is provided when the center is deviated, the integrated design of the rotor positioning mechanism and the bearing pushing mechanism is used, the overall layout of the combination equipment is optimized, and the structure is more compact.

[0059] In addition, it should be understood that the above embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. An electric machine rotor end cap assembly mechanism characterized by, The utility model relates to a bearing pushing mechanism, end cover positioning mechanism and first rotor positioning mechanism are installed on the mounting frame (1), the bearing pushing mechanism (2) is composed of bearing pushing module (21) and pressure head (22), bearing pushing module (21) is fixedly installed on the mounting frame (1), the pressure head (22) is used for contacting bearing inner race upper surface, the pressure head (22) is connected with bearing pushing module (21), moves under the impetus of bearing pushing module (21), the end cover positioning mechanism (3) is composed of end cover pushing module (31) and end cover positioning module (32), end cover positioning module (32) is used for placing end cover and positioning end cover center, end cover pushing module (31) is fixedly installed on the mounting frame (1), end cover positioning module (32) is connected with end cover pushing module (31), moves under the impetus of end cover pushing module (31), end cover pushing module (31) drives the end cover that end cover positioning module (32) positions moves to assembly position and is assembled with the rotor that is positioned through first rotor positioning mechanism (4) or drives end cover positioning module (32) away from assembly position, first rotor positioning mechanism (4) is used for positioning rotor center, bearing pushing mechanism (2) and end cover positioning mechanism (3) are located on the same side of first rotor positioning mechanism (4), pressure head (22) and first rotor positioning mechanism (4) are arranged respectively on the plane of bearing positioning surface of end cover positioning mechanism (3) different sides, the positioning center of end cover positioning mechanism (3) and the positioning center of first rotor positioning mechanism (4) are located on same axis, bearing pushing module (21) drives pressure head (22) moves along the axis direction, end cover pushing module (31) drives end cover positioning module (32) moves along the axis direction.

2. A motor rotor end cap assembly mechanism as claimed in claim 1, wherein, The end cover positioning module (32) is composed of a lateral pushing assembly (321) and N sets of jaw assemblies (322), wherein N is greater than or equal to 2, the lateral pushing assembly (321) is installed on the end cover pushing module (31) and moves under the impetus of the end cover pushing module (31), and the jaw assemblies (322) are installed on the lateral pushing assembly (321) through the bottom plate (323) and move closer to or away from the axis under the impetus of the lateral pushing assembly (321).

3. A motor rotor end cap assembly mechanism as claimed in claim 3, wherein, The clamping block (32221) is provided on the clamping jaw assembly (322), a horizontal supporting surface of the clamping block (32221) is used for supporting a lower surface A1 of the end cover, and a side clamping surface of the clamping block (32221) contacts and clamps a side positioning surface A2 of the end cover; side clamping surfaces of N sets of clamping blocks (32221) contact and clamp the side positioning surface A2 of the end cover, after the center of the end cover is positioned, the transverse pushing assembly (321) controls the clamping blocks (32221) to move away from each other, and the end cover is supported by the horizontal supporting surface of the clamping block (32221) to support the lower surface A1 of the end cover.

4. A motor rotor end cap assembly mechanism as set forth in claim 1, characterized in that, The motor rotor end cover assembly mechanism further comprises a second rotor positioning mechanism (5) installed on the mounting frame (1) and composed of a second pushing module (51) and a second positioning module (52); the second positioning module (52) is used for contacting a rotor assembly end positioning structure B1 and positioning the center of the rotor; the second pushing module (51) is installed on the mounting frame (1), and the second positioning module (52) is installed on the second pushing module (51) and moves along the axial direction under the driving of the second pushing module (51); the diameter of the second positioning module (52) is smaller than the inner diameter of the bearing, and the second positioning module (52) is used for penetrating the inner ring of the end cover bearing and abutting against the rotor assembly end positioning structure B1 or being withdrawn; the positioning center of the second positioning module (52) is located on the axis.

5. An assembly mechanism for a motor rotor end cover as defined in claim 4, wherein The first rotor positioning mechanism (4) is a center tip module, a center tip of the center tip module faces the direction of the bearing pushing mechanism (2), the center of the center tip is located on the axis, and the center tip module is matched with the structure of the rotor non-assembly end positioning structure B2; the second positioning module (52) is a center tip guide rod, the center tip guide rod is arranged along the axial direction, a center tip of the center tip guide rod faces the first rotor positioning mechanism (4), the center of the center tip of the center tip guide rod is located on the axis, and the center tip guide rod is matched with the structure of the rotor assembly end positioning structure B1.

6. A motor rotor end cap assembly mechanism as claimed in claim 4, wherein, The pressing head (22) is a sleeve structure, the inner diameter of the sleeve structure is greater than the diameter of the second positioning module (52), and the center of the pressing surface of the pressing head (22) is located on the axis.

7. An assembly mechanism for a motor rotor end cover as defined in claim 6, wherein The bearing pushing module (21) is composed of a linear pushing assembly (211) and a guide assembly (212); the linear pushing assembly (211) is fixedly installed on the mounting rack (1), the guide assembly (212) is connected with the pressure head (22) through a first mounting plate (2121) at one end and connected with the linear pushing assembly (211) through a second mounting plate (2122) at the other end and moves under the driving of the linear pushing assembly (211); the second pushing module (51) is composed of a second linear pushing assembly (511) and an adapter module (512), the second linear pushing assembly (511) is fixedly installed on the mounting rack (1), an adapter plate (5121) of the adapter module (512) is installed on the second linear pushing assembly (511), an adapter block (5122) is connected with the adapter plate (5121) at the side surface and connected with the second positioning module (52) at the bottom, the adapter module (512) moves under the driving of the second linear pushing 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 position 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 is retracted under the driving of the second pushing module (51).

8. A motor rotor end cap assembly mechanism as claimed in claim 7, wherein, The connecting piece (2123) of the guide assembly (212) is a linear guide rod, the linear guide rod is arranged along the axial direction, and the adapter block (5122) is provided with a hole, and the linear guide rod passes through the hole of the adapter block (5122).

9. An assembly for assembling a motor rotor end shield, comprising: The motor rotor end cover combined assembly device comprises a control system (6), the mounting rack (1) comprises a stand (11) and a base (12); the bearing pushing mechanism (2) and the end cover positioning mechanism (3) are installed on the stand (11); the first rotor positioning mechanism (4) is installed 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 positioned by the end cover positioning mechanism (32) under the driving of the bearing pushing module (21), the bearing pushing module (21) and the end cover pushing module (31) drive the pressure head (22) and the end cover to move towards the first rotor positioning mechanism (4) in a synchronous manner. The motor rotor end cover combined assembly device comprises the following combined assembly method: Control the mechanisms on the combined assembly device to be in a preparation state for assembly; Grab the end cover and place it on the end cover positioning mechanism (3) to position the end cover; Grab the rotor and place it on the first rotor positioning mechanism (4) to position the rotor; Controlling the bearing pushing module (21) to drive the pressure head (22) to move towards the bearing direction and stop after contacting the inner ring of the bearing; Controlling the end cover positioning module (32) to loosen, and the end cover to keep the limited floating range; Controlling the end cover positioning module (32) to move towards the rotor direction at the same time as the pressure head (22), and continue to move after the end cover bearing inner ring and the rotor contact, until the bearing and the end cover move to the position to form the end cover rotor assembly and stop moving; Controlling the end cover positioning module (32) and the pressure head (22) to loosen the end cover; Clamping the end cover rotor assembly to move away from the assembly equipment, and the process ends.

10. An assembly for assembling a motor rotor end shield, as claimed in claim 9, wherein, The first rotor positioning mechanism (4), the bearing pushing mechanism (2), and the second rotor positioning mechanism (5) are respectively provided with pressure sensors.

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