An assembly / disassembly device, installation method, and disassembly method for an electric drive assembly.

Abstract

This invention belongs to the field of vehicle engineering technology, specifically relating to a disassembly and assembly device, installation method, and disassembly method for an electric drive assembly. The disassembly and assembly device includes a support frame for supporting the front end of the gearbox of the electric drive assembly to position the gearbox and position the rear end of the gearbox upward; a fixing unit for fixing the positioned gearbox onto the support frame; a first motion unit for clamping and fixing the stator and motor housing sub-assembly of the electric drive assembly and for driving the stator and motor housing sub-assembly to rotate around its central axis, move in a horizontal plane, press down, and move up; a plurality of first guide shafts for inserting into the motor housing connection hole on the rear end face of the gearbox and threadedly connected to the motor housing connection hole; and a second motion unit for detachably fixing to the rear end of the motor rear end cover of the electric drive assembly and driving the motor rear end cover to rotate around its central axis, move in a horizontal plane, press down, and move up.

Description

Technical Field

[0001] This invention belongs to the field of vehicle engineering technology, and specifically relates to a disassembly and assembly device, installation method and disassembly method for an electric drive assembly. Background Technology

[0002] During the prototype manufacturing of electric drive assemblies, it is often necessary to disassemble and assemble the stator and motor housing sub-assemblies and the rotor sub-assemblies. In the process of fitting the stator and motor housing sub-assemblies onto the rotor sub-assemblies (assembly between the stator and motor housing sub-assemblies and the rotor sub-assemblies) and removing the stator and motor housing sub-assemblies from the sub-assemblies (disassembly between the stator and motor housing sub-assemblies and the rotor sub-assemblies), without the assistance of special tooling, it is very easy for the rotor magnetic shielding plate to rub against the copper wires at the end of the stator, which may cause damage to the insulation.

[0003] To address the aforementioned issues, existing electric drive assembly disassembly and assembly devices typically employ a guide pin on the assembly table as an auxiliary tool to guide the drive mechanism that drives the stator and motor housing subassembly or rotor subassembly, thereby reducing the friction between the rotor magnetic shielding plate and the stator end copper wire during the disassembly and assembly of the electric drive assembly stator and motor housing subassembly and rotor subassembly.

[0004] However, existing electric drive assembly disassembly and assembly devices lack coaxial positioning and fixing of the stator and motor housing subassemblies and rotor subassemblies during disassembly and assembly, as well as coaxial guidance during the mutual movement of the stator and motor housing subassemblies and rotor subassemblies. This makes it difficult to ensure the coaxiality of the stator and motor housing subassemblies and rotor subassemblies during disassembly and assembly due to radial runout, tilting, and other factors. Consequently, rubbing and collision between the rotor magnetic shielding plate and the stator end copper wires can occur during disassembly and assembly, which cannot prevent damage to the stator insulation and easily leads to installation errors that may result in product scrap. Summary of the Invention

[0005] To address the shortcomings of the prior art, this invention provides an electric drive assembly disassembly and assembly device, installation method, and disassembly method. This solves the problem that existing electric drive assembly disassembly and assembly devices often fail to maintain coaxiality between the stator and motor housing sub-assemblies and the rotor sub-assemblies during disassembly and assembly due to radial runout, tilting, and other factors. This leads to rubbing and contact between the rotor magnetic shielding plate and the stator end copper wires during the disassembly and assembly process, failing to prevent damage to the stator insulation and easily causing installation errors that could result in product scrap.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A disassembly and assembly device for an electric drive assembly, comprising:

[0008] Support frame; the support frame is used to support the front end of the gearbox of the electric drive assembly, to position the gearbox, and to position the rear end of the gearbox upward;

[0009] A fixing unit is mounted on the support frame and is used to fix the positioned gearbox on the support frame;

[0010] The first motion unit is used to clamp and fix the stator and motor housing sub-assembly of the electric drive assembly so that the front end of the stator and motor housing sub-assembly faces downward. The first motion unit is also used to drive the stator and motor housing sub-assembly to rotate around its central axis and move in the horizontal plane. The first motion unit is also used to drive the stator and motor housing sub-assembly to press down and move up.

[0011] A first guide shaft, one end of which is used to insert into the motor housing connection hole on the rear end face of the gearbox and is threadedly connected to the motor housing connection hole. Multiple first guide shafts are respectively connected to different motor housing connection holes. The first guide shaft is used for sliding guide engagement with the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly.

[0012] The second motion unit is used to be detachably fixedly connected to the rear end of the motor rear end cover of the electric drive assembly so that the front end of the motor rear end cover faces downward. The second motion unit is used to drive the motor rear end cover to rotate around its central axis and move in the horizontal plane to complete the positioning between the stator and motor housing sub-assembly and the motor rear end cover. The second motion unit is also used to drive the motor rear end cover to press down and move up.

[0013] The support frame supports the front end of the gearbox of the electric drive assembly to position the gearbox, ensuring the rear end of the gearbox faces upwards. This supports the gearbox and axially positions the rotor sub-assembly mounted in the input shaft hole on the rear end face of the gearbox. The fixing unit then fixes the positioned gearbox onto the support frame, thus fixing the axially positioned rotor assembly. The first motion unit clamps and fixes the stator and motor housing sub-assembly, and drives the stator and motor housing sub-assembly to rotate around its central axis and move in the horizontal plane, achieving axial positioning of the stator and motor housing sub-assembly (i.e., axial positioning of the stator). By achieving axial positioning of both the rotor sub-assembly and the stator and motor housing sub-assembly, coaxial positioning between the rotor sub-assembly and the stator and motor housing sub-assembly is achieved.

[0014] During the processes of the first motion unit driving the stator and motor housing sub-assembly to press down (performing the assembly of the rotor sub-assembly and the stator and motor housing sub-assembly) and the first motion unit driving the stator and motor housing sub-assembly to move up (performing the disassembly of the rotor sub-assembly and the stator and motor housing sub-assembly), by making each of the first guide shafts slide and guide each other with the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly, the coaxial guiding function of the stator and motor housing sub-assembly and the rotor sub-assembly during their mutual movement can be realized, and the relative radial displacement between the stator and motor housing sub-assembly and the rotor sub-assembly can be limited. This helps to enhance the coaxial positioning and fixing effect between the stator and motor housing sub-assembly and the rotor sub-assembly, and can avoid radial runout and tilting during the disassembly and assembly of the stator and motor housing sub-assembly and the rotor sub-assembly of the electric drive assembly, thereby ensuring the coaxiality of the stator and motor housing sub-assembly and the rotor sub-assembly. This invention solves the technical problem that when using existing electric drive assembly disassembly and assembly devices, during the disassembly and assembly of the stator and motor housing sub-assemblies and the rotor sub-assemblies, radial runout, tilting, and other factors often make it difficult to ensure the coaxiality of the stator and motor housing sub-assemblies and the rotor sub-assemblies. This leads to rubbing and collision between the rotor magnetic shielding plate and the copper wire at the stator end during the disassembly and assembly of the stator and motor housing sub-assemblies, which cannot prevent damage to the stator insulation and is prone to installation errors that may lead to product scrap.

[0015] The stator and motor housing sub-assembly includes a motor housing and a stator that is thermally fitted into the motor housing;

[0016] Specifically, the positioning between the stator and motor housing sub-assembly and the gearbox is completed, that is, the gearbox housing connection holes on the front end face of the stator and motor housing sub-assembly are aligned with the corresponding motor housing connection holes on the rear end face of the gearbox.

[0017] Furthermore, the disassembly and assembly device for the electric drive assembly also includes a second guide shaft;

[0018] The second motion unit includes a drive mechanism and a sleeve assembly;

[0019] The sleeve assembly is used to be detachably fixedly connected to the rear end face of the motor rear end cover, and the sleeve assembly has a first central hole that is coaxially arranged with the rotor shaft hole on the motor rear end cover.

[0020] The lower end of the second guide shaft is used for a detachable coaxial fixed connection with one end of the rotor shaft of the rotor sub-assembly of the electric drive assembly away from the gearbox. The second guide shaft is used for a sliding guide engagement with the rotor shaft hole and the first center hole.

[0021] The output end of the drive mechanism is fixedly connected to the upper end of the sleeve assembly. The drive mechanism is used to drive the rear end cover of the motor to rotate around its central axis and move in the horizontal plane. The drive mechanism is also used to drive the rear end cover of the motor to press down and move up.

[0022] By sliding and guiding the second guide shaft with the rotor shaft hole and the first center hole, the coaxial guiding function of the stator and motor housing sub-assembly and the motor rear end cover during their mutual movement can be achieved. Furthermore, during the installation or removal of the stator and motor housing sub-assembly and the motor rear end cover using the electric drive assembly disassembly and assembly device provided by this invention, the coaxiality between the stator and motor housing sub-assembly and the motor rear end cover can be maintained. This prevents collision and cutting between the concave stop on the rear end face of the stator and motor housing sub-assembly and the convex stop on the front end face of the motor rear end cover due to insufficient coaxiality during installation or removal, thus avoiding damage to the concave stop and the convex stop. It also prevents debris generated by collision and cutting from falling into the windings on the stator of the stator and motor housing sub-assembly.

[0023] Furthermore, the sleeve assembly includes a connecting flange and a sleeve, the first central hole being the inner hole of the sleeve; the connecting flange has a second central hole, the sleeve passes through the second central hole, and the sleeve slides and guides with the second central hole;

[0024] The connecting flange is used for bolt connection with the rear end face of the motor rear end cover;

[0025] A flange is provided on the outer side of the sleeve, and the upper side of the flange is used to abut against the lower side of the flange to restrict the sliding of the sleeve in the second central hole;

[0026] The upper end of the sleeve is fixedly connected to the output end of the drive mechanism.

[0027] Furthermore, the disassembly and assembly device for the electric drive assembly also includes a wave spring positioning sleeve;

[0028] The wave spring positioning sleeve is used to be sleeved on the end of the rotor shaft away from the gearbox. The lower end face of the wave spring positioning sleeve is used to fit against the bearing installed on the end of the rotor shaft away from the gearbox. The outer peripheral surface of the wave spring positioning sleeve is used to cooperate with the inner peripheral surface of the wave spring of the electric drive assembly.

[0029] A first boss is provided on the lower end face of the second guide shaft. The first boss is used to insert into the inner hole of the wave spring positioning sleeve from the top. The outer peripheral surface of the first boss is engaged with the inner peripheral surface of the inner hole of the wave spring positioning sleeve. An external thread is provided on the lower end face of the first boss. The external thread is used to connect with the internal thread on the end of the rotor shaft away from the gearbox. The shoulder of the first boss is used to abut against the upper end face of the wave spring positioning sleeve.

[0030] By setting the wave spring positioning sleeve and making the outer circumferential surface of the wave spring positioning sleeve cooperate with the inner circumferential surface of the wave spring of the electric drive assembly, the problem of alignment difficulty when installing the wave spring onto the rotor shaft can be solved by sleeved the wave spring onto the wave spring positioning sleeve (since the inner diameter of the wave spring is usually larger than the outer diameter of its sleeved part on the rotor shaft). This solves the technical problem of the motor rear end cover squeezing and damaging the wave spring due to the alignment deviation of the wave spring installed on the rotor shaft during the installation of the stator and motor housing sub-assembly and the motor rear end cover.

[0031] Furthermore, the support frame includes: a support base plate, an input shaft position support block, an intermediate shaft position support block, and an output shaft position support block fixedly mounted on the support base plate;

[0032] The upper end face of the input shaft position support block is used to support the outer edge of the input shaft hole on the front end face of the gearbox;

[0033] The upper end face of the intermediate shaft position support block is used to support the outer edge of the intermediate shaft hole on the front end face of the gearbox.

[0034] The upper end face of the output shaft position support block is used to support the outer edge of the output shaft hole on the front end face of the gearbox;

[0035] The upper surface of the input shaft position support block is provided with a second boss, the upper surface of the intermediate shaft position support block is provided with a third boss, and the upper surface of the output shaft position support block is provided with a fourth boss.

[0036] The second boss, the third boss, and the fourth boss are used to pass through the input shaft hole, the intermediate shaft hole, and the output shaft hole, respectively, when positioning the gearbox;

[0037] The outer peripheral surface of the second boss mates with the inner surface of the input shaft hole, the outer peripheral surface of the third boss mates with the inner surface of the intermediate shaft hole, and the outer peripheral surface of the fourth boss mates with the inner surface of the output shaft hole.

[0038] By setting the input shaft position support block, the intermediate shaft position support block, and the output shaft position support block, a stable three-point support can be achieved for the gearbox. Furthermore, by setting the second, third, and fourth bosses to pass through the input shaft hole, the intermediate shaft hole, and the output shaft hole respectively when positioning the gearbox, and ensuring that the outer peripheral surface of the second boss mates with the inner surface of the input shaft hole, the outer peripheral surface of the third boss mates with the inner surface of the intermediate shaft hole, and the outer peripheral surface of the fourth boss mates with the inner surface of the output shaft hole, the gearbox can be positioned and its horizontal movement restricted. This achieves radial limiting of the rotor sub-assembly mounted on the gearbox, effectively preventing radial runout and tilting of the rotor sub-assembly during the disassembly and assembly of the electric drive assembly.

[0039] Furthermore, the fixing unit includes multiple locking mechanisms that correspond one-to-one with each lifting lug on the side of the gearbox, and each locking mechanism is fixedly installed on the support frame;

[0040] The locking mechanism is used to bolt the corresponding lifting lug after the gearbox is positioned, or to press down the corresponding lifting lug to fix the positioned gearbox on the support frame.

[0041] According to the electric drive assembly disassembly and assembly device provided by the present invention, the present invention also provides an electric drive assembly installation method, the installation method comprising:

[0042] The gearbox of the electric drive assembly is supported and positioned using a support frame;

[0043] The gearbox, after being positioned, is fixed onto the support frame using a fixing unit;

[0044] A first guide shaft is threaded into at least two motor housing connection holes on the rear end face of the gearbox, and the rotor sub-assembly of the electric drive assembly is installed into the input shaft hole on the rear end face of the gearbox.

[0045] The stator and motor housing sub-assembly of the electric drive assembly are clamped and fixed using the first motion unit;

[0046] The first motion unit drives the stator and motor housing sub-assembly to rotate around its central axis and move in the horizontal plane, so that the gearbox housing connection holes on the front end face of the stator and motor housing sub-assembly are aligned with the corresponding motor housing connection holes on the rear end face of the gearbox.

[0047] The first motion unit drives the stator and motor housing sub-assembly to press down, so that each of the first guide shafts passes through the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly until the front end face of the stator and motor housing sub-assembly is pressed down to fit against the rear end face of the gearbox.

[0048] After removing each of the first guide shafts, the connection between the stator and motor housing sub-assembly and the gearbox is completed;

[0049] The rear end cover of the motor of the electric drive assembly is mounted onto the second motion unit;

[0050] The second motion unit drives the rear end cover of the motor to rotate around its central axis and move in the horizontal plane to complete the positioning between the stator and motor housing sub-assembly and the rear end cover of the motor.

[0051] The second motion unit drives the rear end cover of the motor to press down, completing the assembly between the rear end cover of the motor and the stator and motor housing sub-assembly.

[0052] Furthermore, after installing the rotor sub-assembly of the electric drive assembly into the input shaft hole on the rear end face of the gearbox; a wave spring positioning sleeve is fitted onto the end of the rotor shaft of the rotor sub-assembly away from the gearbox, and the lower end face of the wave spring positioning sleeve is in contact with the bearing installed on the end of the rotor shaft away from the gearbox; after fitting the wave spring of the electric drive assembly onto the outer circumferential surface of the wave spring positioning sleeve; the stator and motor housing sub-assembly of the electric drive assembly are then clamped and fixed using the first motion unit.

[0053] After completing the connection between the stator and motor housing sub-assembly and the gearbox, the first boss on the lower end face of the second guide shaft is inserted from the top into the inner hole of the wave spring positioning sleeve and threaded to the end of the rotor shaft away from the gearbox. After the shoulder of the first boss abuts against the upper end face of the wave spring positioning sleeve, the rear end cover of the motor of the electric drive assembly is installed on the second motion unit.

[0054] According to the electric drive assembly disassembly and assembly device provided by the present invention, the present invention also provides a method for disassembling the electric drive assembly, the disassembly method comprising:

[0055] The gearbox of the electric drive assembly is supported and positioned using a support frame, thereby completing the positioning of the electric drive assembly;

[0056] The positioned electric drive assembly is fixed onto the support frame using a fixing unit;

[0057] Remove the connecting bolts between the motor rear end cover of the electric drive assembly and the stator and motor housing sub-assembly of the electric drive assembly;

[0058] Complete the fixed connection between the second motion unit and the rear end cover of the motor;

[0059] The second motion unit drives the rear end cover of the motor to move upward, thereby completing the removal of the rear end cover of the motor;

[0060] Remove the connecting bolts between the stator and motor housing sub-assembly and the gearbox of the electric drive assembly;

[0061] A first guide shaft is inserted into each of the at least two gearbox housing connection holes of the stator and motor housing sub-assembly, and each of the first guide shafts is threaded to the corresponding motor housing connection hole on the rear end face of the gearbox.

[0062] The stator and motor housing sub-assembly are clamped and fixed using the first motion unit;

[0063] The first motion unit drives the stator and motor housing sub-assembly to move upward, thereby completing the separation between the stator and motor housing sub-assembly and the rotor sub-assembly of the electric drive assembly;

[0064] The rotor subassembly is removed from the input shaft hole on the rear end face of the gearbox, thus completing the disassembly of the electric drive assembly.

[0065] Furthermore, after removing the connecting bolts between the motor rear end cover of the electric drive assembly and the stator and motor housing sub-assembly of the electric drive assembly; the lower end of the second guide shaft is inserted into the rotor shaft hole on the motor rear end cover and threadedly connected to the end of the rotor shaft of the rotor sub-assembly away from the gearbox, and then the fixed connection between the second motion unit and the motor rear end cover is completed.

[0066] The method for completing the fixed connection between the second motion unit and the rear end cover of the motor includes: fixing the sleeve assembly of the second motion unit to the rear end face of the rear end cover of the motor, and inserting the upper end of the second guide shaft into the first central hole of the sleeve assembly; and then fixing the output end of the drive mechanism of the second motion unit to the upper end of the sleeve assembly. Attached Figure Description

[0067] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0068] Figure 1 This is a schematic diagram of the assembly structure of the first guide shaft, reduction gearbox, wave spring and rotor assembly in the embodiment;

[0069] Figure 2 This is a schematic diagram of the assembly structure of the first guide shaft, the reduction gearbox, the wave spring, the wave spring positioning sleeve, and the rotor assembly in the embodiment.

[0070] Figure 3 This is a schematic diagram of the combined structure of the stator and motor housing sub-assembly and the rotor sub-assembly in the embodiment;

[0071] Figure 4 This is a schematic diagram of the installation structure of the second guide shaft on the rotor shaft in the embodiment;

[0072] Figure 5 This is a schematic diagram of the installation structure of the second motion unit and the rear end cover of the motor in the embodiment;

[0073] Figure 6 This is a schematic diagram of the assembled structure of the motor rear end cover, stator, and motor housing sub-assembly in the embodiment;

[0074] Figure 7 This is a schematic diagram of the disassembly and assembly device for the electric drive assembly and the installation cross-sectional structure of the electric drive assembly in the embodiment.

[0075] Figure 8 This is a three-dimensional structural diagram of the sleeve in the embodiment;

[0076] Figure 9 This is a schematic diagram of the structure of the first guide shaft in the embodiment;

[0077] Figure 10 This is a three-dimensional structural schematic diagram of the second guide shaft in the embodiment;

[0078] Figure 11 This is a structural schematic diagram of the support frame and fixing unit in the embodiment;

[0079] Among them, 1—gearbox, 2—stator and motor housing sub-assembly, 3—first guide shaft, 4—motor rear end cover, 5—rotor sub-assembly, 6—second guide shaft, 7—sleeve assembly, 8—wave spring positioning sleeve, 9—bearing, 10—wave spring, 11—support base plate, 12—input shaft position support block, 13—intermediate shaft position support block, 14—output shaft position support block, 15—suspending hole position support block, 16—locking mechanism;

[0080] 3.1—First external thread; 3.2—First clamping groove;

[0081] 4.1 — Rotor shaft hole;

[0082] 5.1 — Rotor shaft;

[0083] 6.1—First boss; 6.2—Second clamping groove;

[0084] 6.1.1—Second external thread;

[0085] 7.1 — Connecting flange; 7.2 — Sleeve;

[0086] 7.2.1—First center hole; 7.2.2—Flange;

[0087] 16.1—Column, 16.2—Horizontal rotating plate, 16.3—Locking knob. Detailed Implementation

[0088] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0089] Example 1:

[0090] like Figures 1 to 11 As shown, Embodiment 1 provides a disassembly and assembly device for an electric drive assembly, comprising:

[0091] Support frame; The support frame is used to support the front end of the gearbox 1 of the electric drive assembly, to position the gearbox 1, and to make the rear end of the gearbox 1 face upward.

[0092] The fixing unit is installed on the support frame and is used to fix the positioned gearbox 1 on the support frame;

[0093] The first motion unit (not shown in the figure) is used to clamp and fix the stator and motor housing sub-assembly 2 of the electric drive assembly so that the front end of the stator and motor housing sub-assembly 2 faces downward. The first motion unit is also used to drive the stator and motor housing sub-assembly 2 to rotate around its central axis and move in the horizontal plane. The first motion unit is also used to drive the stator and motor housing sub-assembly 2 to press down and move up.

[0094] The first guide shaft 3 has one end inserted into the motor housing connection hole on the rear end face of the gearbox 1 and threadedly connected to the motor housing connection hole. Multiple first guide shafts 3 are respectively connected to different motor housing connection holes. The first guide shaft 3 is used for sliding guide engagement with the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly 2.

[0095] The second motion unit is used to detachably fix the rear end of the motor rear end cover 4 of the electric drive assembly so that the front end of the motor rear end cover 4 faces downward. The second motion unit is used to drive the motor rear end cover 4 to rotate around its central axis and move in the horizontal plane to complete the positioning between the stator and motor housing sub-assembly 2 and the motor rear end cover 4. The second motion unit is also used to drive the motor rear end cover 4 to press down and move up.

[0096] By using a support frame to support the front end of the gearbox 1 of the electric drive assembly, the gearbox 1 is positioned, and the rear end of the gearbox 1 faces upward. This supports the gearbox 1 and axially positions the rotor sub-assembly 5, which is installed in the input shaft hole on the rear end face of the gearbox 1. The positioning gearbox 1 is then fixed to the support frame using a fixing unit, thus fixing the axially positioned rotor assembly. The first motion unit clamps and fixes the stator and motor housing sub-assembly 2, and drives the stator and motor housing sub-assembly 2 to rotate around its central axis and move in the horizontal plane, thus axially positioning the stator and motor housing sub-assembly 2 (i.e., axially positioning the stator). By completing the axial positioning of the rotor sub-assembly 5 and the stator and motor housing sub-assembly 2, coaxial positioning between the rotor sub-assembly 5 and the stator and motor housing sub-assembly 2 is achieved.

[0097] During the processes of the first motion unit driving the stator and motor housing sub-assembly 2 to press down (to assemble the rotor sub-assembly 5 and the stator and motor housing sub-assembly 2), and the first motion unit driving the stator and motor housing sub-assembly 2 to move up (to disassemble the rotor sub-assembly 5 and the stator and motor housing sub-assembly 2), by making each of the first guide shafts 3 slide and guide each other with the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly 2, the coaxial guiding function of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5 during their mutual movement can be realized, and the relative radial displacement between the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5 can be restricted. This helps to strengthen the coaxial positioning and fixing effect between the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5, and can avoid radial runout and tilting during the disassembly and assembly of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5 of the electric drive assembly, thereby ensuring the coaxiality of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5. This invention solves the technical problem that when using existing electric drive assembly disassembly and assembly devices, during the disassembly and assembly of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5 of the electric drive assembly, radial runout, tilting and other factors often make it difficult to ensure the coaxiality of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5. This leads to rubbing and collision between the rotor magnetic shielding plate and the copper wire at the end of the stator during the disassembly and assembly of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5, which cannot prevent damage to the stator insulation and is prone to installation errors that may lead to product scrap.

[0098] Among them, the stator and motor housing sub-assembly 2 includes the motor housing and the stator that is heat-fitted into the motor housing;

[0099] Specifically, the positioning between the stator and motor housing sub-assembly 2 and the gearbox 1 is completed, that is, the gearbox housing connection holes on the front end face of the stator and motor housing sub-assembly 2 are aligned with the corresponding motor housing connection holes on the rear end face of the gearbox 1.

[0100] Preferably, in this embodiment 1, as Figure 9 As shown, the first end of the first guide shaft 3 is provided with a first external thread 3.1 for threaded connection with the motor housing connection hole. The second end of the first guide shaft 3 is set to be tapered so that the first guide shaft 3 can be inserted into the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly 2 for sliding guidance. A first clamping groove 3.2 is provided on the outer circumferential surface of the first guide shaft 3. The first clamping groove 3.2 is located on the side near the second end. The operator can use a wrench or other tools to clamp the first clamping groove 3.2 to screw the first guide shaft 3 into and out of the corresponding gearbox housing connection hole.

[0101] In one embodiment, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, the disassembly and assembly device for the electric drive assembly also includes a second guide shaft 6; the second motion unit includes a drive mechanism (not shown in the figure) and a sleeve assembly 7;

[0102] The sleeve assembly 7 is used to be detachably fixedly connected to the rear end face of the motor rear end cover 4. The sleeve assembly 7 has a first center hole 7.2.1 that is coaxially arranged with the rotor shaft hole 4.1 on the motor rear end cover 4.

[0103] The lower end of the second guide shaft 6 is used for a detachable coaxial fixed connection with the end of the rotor shaft 5.1 of the rotor sub-assembly 5 of the electric drive assembly away from the gearbox 1. The second guide shaft 6 is used for sliding guide engagement with the rotor shaft hole 4.1 and the first center hole 7.2.1.

[0104] The output end of the drive mechanism is fixedly connected to the upper end of the sleeve assembly 7. The drive mechanism is used to drive the rear end cover 4 of the motor to rotate around its central axis and move in the horizontal plane. The drive mechanism is also used to drive the rear end cover 4 of the motor to press down and move up.

[0105] By sliding and guiding the second guide shaft 6 with the rotor shaft hole 4.1 and the first center hole 7.2.1, the coaxial guiding function can be achieved during the mutual movement of the stator and motor housing sub-assembly 2 and the motor rear end cover 4. Furthermore, during the installation or removal of the stator and motor housing sub-assembly 2 and the motor rear end cover 4 using the electric drive assembly disassembly and assembly device provided by this invention, the coaxiality between the stator and motor housing sub-assembly 2 and the motor rear end cover 4 can be maintained. This prevents collision and cutting between the concave stop on the rear end face of the stator and motor housing sub-assembly 2 and the convex stop on the front end face of the motor rear end cover 4 due to insufficient coaxiality during installation or removal, thus avoiding damage to the concave and convex stops. It also prevents debris generated by collision and cutting from falling into the windings on the stator of the stator and motor housing sub-assembly 2.

[0106] Preferably, in this embodiment 1, as Figures 5 to 8 As shown, the sleeve assembly 7 includes a connecting flange 7.1 and a sleeve 7.2. The first central hole 7.2.1 is the inner hole of the sleeve 7.2. The connecting flange 7.1 has a second central hole, through which the sleeve 7.2 passes and slides in a guide fit with the second central hole.

[0107] The connecting flange 7.1 is used for bolt connection to the rear end face of the motor rear end cover 4;

[0108] A flange 7.2.2 is provided on the outer side of the sleeve 7.2. The upper side of the flange 7.2.2 is used to abut against the lower side of the flange to limit the sliding of the sleeve 7.2 in the second central hole;

[0109] The upper end of sleeve 7.2 is fixedly connected to the output end of the drive mechanism.

[0110] Preferably, in this embodiment 1, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 10 As shown, the disassembly and assembly device for the electric drive assembly also includes a wave spring positioning sleeve 8;

[0111] The wave spring positioning sleeve 8 is used to be sleeved on the end of the rotor shaft 5.1 away from the gearbox 1. The lower end face of the wave spring positioning sleeve 8 is used to fit with the bearing 9 installed on the end of the rotor shaft 5.1 away from the gearbox 1. The outer peripheral surface of the wave spring positioning sleeve 8 is used to cooperate with the inner peripheral surface of the wave spring 10 of the electric drive assembly.

[0112] A first boss 6.1 is provided on the lower end face of the second guide shaft 6. The first boss 6.1 is used to insert into the inner hole of the wave spring positioning sleeve 8 from the top. The outer peripheral surface of the first boss 6.1 is engaged with the inner peripheral surface of the inner hole of the wave spring positioning sleeve 8. A second external thread 6.1.1 is provided on the lower end face of the first boss 6.1. The second external thread 6.1.1 is used to connect with the internal thread on the end of the rotor shaft 5.1 away from the gearbox 1. The shoulder of the first boss 6.1 is used to abut against the upper end face of the wave spring positioning sleeve 8.

[0113] By setting a wave spring positioning sleeve 8 and having its outer circumferential surface mate with the inner circumferential surface of the wave spring 10 of the electric drive assembly, the problem of alignment difficulty when installing the wave spring 10 onto the rotor shaft 5.1 can be solved by sleeved around the wave spring positioning sleeve 8 (since the inner diameter of the wave spring 10 is usually larger than the outer diameter of its sleeved portion on the rotor shaft 5.1). This also solves the technical problem of damage to the wave spring 10 caused by the alignment deviation of the wave spring 10 on the rotor shaft 5.1 during the installation of the stator and motor housing sub-assembly 2 and the motor rear end cover 4.

[0114] Preferably, in this embodiment 1, as Figure 10As shown, a second clamping groove 6.2 is provided on the outer circumferential surface of the second guide shaft 6. The second clamping groove 6.2 is located on the side away from the first boss 6.1. By using tools such as wrenches to clamp the second clamping groove 6.2, the operator can screw the second external thread 6.1.1 into and out of the internal thread on the end of the rotor shaft 5.1 away from the gearbox 1.

[0115] In one embodiment, such as Figure 11 As shown, the support frame includes: a support base plate 11, an input shaft position support block 12, an intermediate shaft position support block 13, and an output shaft position support block 14, all fixedly mounted on the support base plate 11.

[0116] The upper end face of the input shaft position support block 12 is used to support the outer edge of the input shaft hole on the front end face of the gearbox 1;

[0117] The upper end face of the intermediate shaft position support block 13 is used to support the outer edge of the intermediate shaft hole on the front end face of the gearbox 1;

[0118] The upper end face of the output shaft position support block 14 is used to support the outer edge of the output shaft hole on the front end face of the gearbox 1;

[0119] The upper surface of the input shaft position support block 12 is provided with a second boss (not shown in the figure), the upper surface of the intermediate shaft position support block 13 is provided with a third boss (not shown in the figure), and the upper surface of the output shaft position support block 14 is provided with a fourth boss (not shown in the figure).

[0120] The second boss, the third boss, and the fourth boss are used to pass through the input shaft hole, the intermediate shaft hole, and the output shaft hole, respectively, when positioning the gearbox 1.

[0121] The outer peripheral surface of the second boss mates with the inner surface of the input shaft hole, the outer peripheral surface of the third boss mates with the inner surface of the intermediate shaft hole, and the outer peripheral surface of the fourth boss mates with the inner surface of the output shaft hole.

[0122] By setting the input shaft position support block 12, the intermediate shaft position support block 13, and the output shaft position support block 14, a stable three-point support can be achieved for the gearbox 1. Furthermore, by setting the second, third, and fourth bosses to pass through the input shaft hole, intermediate shaft hole, and output shaft hole respectively when positioning the gearbox 1, and by making the outer peripheral surface of the second boss cooperate with the inner surface of the input shaft hole, the outer peripheral surface of the third boss cooperate with the inner surface of the intermediate shaft hole, and the outer peripheral surface of the fourth boss cooperate with the inner surface of the output shaft hole, the gearbox 1 can be positioned and its horizontal movement restricted. This achieves radial limiting of the rotor sub-assembly 5 installed on the gearbox 1, and effectively prevents radial runout and tilting of the rotor sub-assembly 5 during the disassembly and assembly of the electric drive assembly.

[0123] Preferably, in this embodiment 1, as Figure 11 As shown, the support frame also includes two suspension hole position support blocks 15, one of which is used to support the outer edge of one of the suspension holes on the front end face of the gearbox 1, and the other is used to support the outer edge of the other suspension hole on the front end face of the gearbox 1.

[0124] A fifth boss (not shown in the figure) is provided on the upper end surface of the suspension hole position support block 15. The fifth boss is used to pass through the corresponding suspension hole when positioning the gearbox 1. The outer peripheral surface of the fifth boss cooperates with the inner surface of the suspension hole.

[0125] In one embodiment, such as Figure 11 As shown, the fixing unit includes multiple locking mechanisms 16 that correspond one-to-one with each lifting lug on the side of the gearbox 1, and each locking mechanism 16 is fixedly installed on the support frame.

[0126] The locking mechanism 16 is used to bolt the corresponding lifting lug after the gearbox 1 has been positioned, or to press down the corresponding lifting lug to fix the positioned gearbox 1 on the support frame.

[0127] There are multiple ways to set the locking mechanism 16, as long as it can fix the positioned gearbox 1 on the support frame. In this embodiment, two of the solutions are listed.

[0128] In the scheme where the locking mechanism 16 is used to press down the corresponding lifting lug after the gearbox 1 has been positioned, the locking mechanism 16 can be a pressing cylinder.

[0129] In the scheme where the locking mechanism 16 is used to bolt the corresponding lifting lug after the gearbox 1 has been positioned, such as... Figure 11 As shown, the locking mechanism 16 includes a column 16.1, a horizontal rotating plate 16.2, and a locking knob 16.3;

[0130] The lower end of the column 16.1 is fixedly connected to the support base plate 11, and one end of the horizontal rotating plate 16.2 is hinged to the upper end of the column 16.1, so that the horizontal rotating plate 16.2 can rotate in the horizontal plane around its hinge point on the column 16.1. The horizontal rotating plate 16.2 is provided with bolt holes (not shown in the figure) for connecting with the corresponding lifting lug bolts. The locking knob 16.3 is provided at the hinge point of the horizontal rotating plate 16.2 on the column 16.1. The locking knob 16.3 is used to lock and fix the horizontal rotating plate 16.2 or to release the locking and fixing of the horizontal rotating plate 16.2.

[0131] Example 2:

[0132] According to the electric drive assembly disassembly and assembly device provided in Embodiment 1, Embodiment 2 also provides an electric drive assembly installation method, the installation method including:

[0133] The gearbox 1 of the electric drive assembly is supported and positioned using a support frame;

[0134] The positioning gearbox 1 is fixed on the support frame using a fixing unit;

[0135] The first guide shaft 3 is threaded into at least two motor housing connection holes on the rear end face of the gearbox 1, and the rotor sub-assembly 5 of the electric drive assembly is installed into the input shaft hole on the rear end face of the gearbox 1.

[0136] The first motion unit is used to clamp and fix the stator and motor housing of the electric drive assembly into sub-assembly 2;

[0137] The first motion unit drives the stator and motor housing sub-assembly 2 to rotate around its central axis and move in the horizontal plane, so that the gearbox housing connection holes on the front end face of the stator and motor housing sub-assembly 2 are aligned with the corresponding motor housing connection holes on the rear end face of the gearbox 1.

[0138] The first motion unit drives the stator and motor housing sub-assembly 2 to press down, so that each first guide shaft 3 passes into the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly 2, until the front end face of the stator and motor housing sub-assembly 2 is pressed down to fit against the rear end face of the gearbox 1.

[0139] After removing each of the first guide shafts 3, the connection between the stator and motor housing sub-assembly 2 and the gearbox 1 is completed;

[0140] Install the motor rear end cover 4 of the electric drive assembly onto the second motion unit;

[0141] The second motion unit drives the rear end cover 4 of the motor to rotate around its central axis and move in the horizontal plane to complete the positioning between the stator and motor housing sub-assembly 2 and the rear end cover 4 of the motor.

[0142] The second motion unit drives the rear end cover 4 of the motor to press down, completing the assembly between the rear end cover 4 of the motor and the stator and motor housing sub-assembly 2.

[0143] Preferably, in this embodiment 2, the installation method further includes: installing the rotor sub-assembly 5 of the electric drive assembly into the input shaft hole on the rear end face of the gearbox 1; fitting the wave spring positioning sleeve 8 onto the end of the rotor shaft 5.1 of the rotor sub-assembly 5 away from the gearbox 1, and making the lower end face of the wave spring positioning sleeve 8 fit against the bearing 9 installed on the end of the rotor shaft 5.1 away from the gearbox 1; fitting the wave spring 10 of the electric drive assembly onto the outer peripheral surface of the wave spring positioning sleeve 8; and then using the first motion unit to clamp and fix the stator and motor housing sub-assembly 2 of the electric drive assembly.

[0144] After completing the connection between the stator and motor housing sub-assembly 2 and the gearbox 1, the first boss 6.1 on the lower end face of the second guide shaft 6 is inserted from the top into the inner hole of the wave spring positioning sleeve 8 and threaded to the end of the rotor shaft 5.1 away from the gearbox 1. After the shoulder of the first boss 6.1 abuts against the upper end face of the wave spring positioning sleeve 8, the rear end cover 4 of the electric drive assembly is then installed onto the second motion unit.

[0145] Example 3:

[0146] According to the electric drive assembly disassembly and assembly device provided in Embodiment 1, Embodiment 3 provides a method for disassembling an electric drive assembly, the disassembly method including:

[0147] The gearbox 1 of the electric drive assembly is supported and positioned using a support frame, thereby completing the positioning of the electric drive assembly;

[0148] The positioned electric drive assembly is fixed to the support frame using a fixing unit;

[0149] Remove the connecting bolts between the motor rear end cover 4 of the electric drive assembly and the stator and motor housing sub-assembly 2 of the electric drive assembly;

[0150] Complete the fixed connection between the second motion unit and the rear end cover 4 of the motor;

[0151] The second motion unit drives the rear end cover 4 of the motor to move upward, thus completing the removal of the rear end cover 4 of the motor;

[0152] Remove the connecting bolts between the stator and motor housing sub-assembly 2 and the gearbox 1 of the electric drive assembly;

[0153] A first guide shaft 3 is inserted into each of the at least two gearbox housing connection holes of the stator and motor housing sub-assembly 2, and each first guide shaft 3 is threaded to the corresponding motor housing connection hole on the rear end face of the gearbox 1.

[0154] The first motion unit is used to clamp and fix the stator and motor housing sub-assembly 2;

[0155] The first motion unit drives the stator and motor housing sub-assembly 2 to move upward, thereby completing the separation between the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5 of the electric drive assembly;

[0156] Remove the rotor sub-assembly 5 from the input shaft hole on the rear end face of the gearbox 1 to complete the disassembly of the electric drive assembly.

[0157] Preferably, in this embodiment 3, after removing the connecting bolts between the motor rear end cover 4 of the electric drive assembly and the stator and motor housing sub-assembly 2 of the electric drive assembly, the lower end of the second guide shaft 6 is inserted into the rotor shaft hole 4.1 on the motor rear end cover 4 and then threadedly connected to the end of the rotor shaft 5.1 of the rotor sub-assembly 5 away from the gearbox 1, and then the fixed connection between the second motion unit and the motor rear end cover 4 is completed.

[0158] The method for completing the fixed connection between the second motion unit and the rear end cover 4 of the motor includes: fixing the sleeve assembly 7 of the second motion unit to the rear end face of the rear end cover 4 of the motor, and inserting the upper end of the second guide shaft 6 into the first central hole 7.2.1 of the sleeve assembly 7; and then fixing the output end of the drive mechanism of the second motion unit to the upper end of the sleeve assembly 7.

[0159] The electric drive assembly disassembly and assembly device, installation method, and disassembly method provided by this invention have at least the following technical effects or advantages:

[0160] 1. By using a support frame to support the front end of the gearbox 1 of the electric drive assembly, the gearbox 1 is positioned and its rear end faces upward, thus supporting the gearbox 1 and axially positioning the rotor sub-assembly 5 installed in the input shaft hole on the rear end face of the gearbox 1. The gearbox 1, after being positioned, is fixed on the support frame by a fixing unit, thus fixing the rotor assembly after axial positioning. The stator and motor housing sub-assembly 2 is clamped and fixed by the first motion unit, and the stator and motor housing sub-assembly 2 is driven to rotate around its central axis and move in the horizontal plane, thus axially positioning the stator and motor housing sub-assembly 2 (that is, axial positioning of the stator) is achieved. By completing the axial positioning of the rotor sub-assembly 5 and the stator and motor housing sub-assembly 2, the coaxial positioning between the rotor sub-assembly 5 and the stator and motor housing sub-assembly 2 is achieved.

[0161] During the processes of the first motion unit driving the stator and motor housing sub-assembly 2 to press down (to assemble the rotor sub-assembly 5 and the stator and motor housing sub-assembly 2), and the first motion unit driving the stator and motor housing sub-assembly 2 to move up (to disassemble the rotor sub-assembly 5 and the stator and motor housing sub-assembly 2), by making each of the first guide shafts 3 slide and guide each other with the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly 2, the coaxial guiding function of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5 during their mutual movement can be realized, and the relative radial displacement between the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5 can be restricted. This helps to strengthen the coaxial positioning and fixing effect between the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5, and can avoid radial runout and tilting during the disassembly and assembly of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5 of the electric drive assembly, thereby ensuring the coaxiality of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5. This invention solves the technical problem that when using existing electric drive assembly disassembly and assembly devices, during the disassembly and assembly of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5 of the electric drive assembly, radial runout, tilting and other factors often make it difficult to ensure the coaxiality of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5. This leads to rubbing and collision between the rotor magnetic shielding plate and the copper wire at the end of the stator during the disassembly and assembly of the stator and motor housing sub-assembly 2 and the rotor sub-assembly 5, which cannot prevent damage to the stator insulation and is prone to installation errors that may lead to product scrap.

[0162] 2. By sliding and guiding the second guide shaft 6 with the rotor shaft hole 4.1 and the first center hole 7.2.1, the coaxial guiding function can be achieved during the mutual movement of the stator and motor housing sub-assembly 2 and the motor rear end cover 4. Thus, during the installation or removal of the stator and motor housing sub-assembly 2 and the motor rear end cover 4 using the electric drive assembly disassembly and assembly device provided by this invention, the coaxiality between the stator and motor housing sub-assembly 2 and the motor rear end cover 4 can be maintained. This prevents collision and cutting between the concave stop on the rear end face of the stator and motor housing sub-assembly 2 and the convex stop on the front end face of the motor rear end cover 4 due to insufficient coaxiality between the stator and motor housing sub-assembly 2 and the motor rear end cover 4 during installation or removal, thereby preventing damage to the concave stop and convex stop. It also prevents debris generated by collision and cutting from falling into the windings on the stator of the stator and motor housing sub-assembly 2.

[0163] 3. By setting a wave spring positioning sleeve 8 and making the outer circumferential surface of the wave spring positioning sleeve 8 cooperate with the inner circumferential surface of the wave spring 10 of the electric drive assembly, the problem of centering difficulty when installing the wave spring 10 onto the rotor shaft 5.1 can be solved by sleeved on the outside of the wave spring positioning sleeve 8 (since the inner diameter of the wave spring 10 is usually larger than the outer diameter of its sleeved part on the rotor shaft 5.1). This solves the technical problem of the motor rear end cover 4 squeezing and damaging the wave spring 10 due to the centering deviation of the wave spring 10 on the rotor shaft 5.1 during the installation of the stator and motor housing sub-assembly 2 and the motor rear end cover 4.

[0164] 4. By setting the input shaft position support block 12, the intermediate shaft position support block 13, and the output shaft position support block 14, a stable three-point support can be achieved for the gearbox 1. Furthermore, by setting the second boss, the third boss, and the fourth boss to pass through the input shaft hole, the intermediate shaft hole, and the output shaft hole respectively when positioning the gearbox 1, and making the outer peripheral surface of the second boss cooperate with the inner surface of the input shaft hole, the outer peripheral surface of the third boss cooperate with the inner surface of the intermediate shaft hole, and the outer peripheral surface of the fourth boss cooperate with the inner surface of the output shaft hole, the gearbox 1 can be positioned and its horizontal movement can be restricted. This achieves radial limiting of the rotor sub-assembly 5 installed on the gearbox 1, and effectively prevents radial runout and tilting of the rotor sub-assembly 5 during the disassembly and assembly of the electric drive assembly.

[0165] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of the present invention.

Claims

1. A disassembly and assembly device for an electric drive assembly, characterized in that, include: Support frame; the support frame is used to support the front end of the gearbox of the electric drive assembly to position the gearbox and to position the rear end of the gearbox upward; A fixing unit is mounted on the support frame and is used to fix the positioned gearbox on the support frame; The first motion unit is used to clamp and fix the stator and motor housing sub-assembly of the electric drive assembly so that the front end of the stator and motor housing sub-assembly faces downward. The first motion unit is also used to drive the stator and motor housing sub-assembly to rotate around its central axis and move in the horizontal plane. The first motion unit is also used to drive the stator and motor housing sub-assembly to press down and move up. A first guide shaft, one end of which is used to insert into the motor housing connection hole on the rear end face of the gearbox and is threadedly connected to the motor housing connection hole. Multiple first guide shafts are respectively connected to different motor housing connection holes. The first guide shaft is used for sliding guide engagement with the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly. The second motion unit is used to be detachably fixedly connected to the rear end of the motor rear end cover of the electric drive assembly so that the front end of the motor rear end cover faces downward. The second motion unit is used to drive the motor rear end cover to rotate around its central axis and move in the horizontal plane to complete the positioning between the stator and motor housing sub-assembly and the motor rear end cover. The second motion unit is also used to drive the motor rear end cover to press down and move up. The disassembly and assembly device for the electric drive assembly also includes a second guide shaft; the second motion unit includes a drive mechanism and a sleeve assembly; The sleeve assembly is used to be detachably fixedly connected to the rear end face of the motor rear end cover, and the sleeve assembly has a first central hole that is coaxially arranged with the rotor shaft hole on the motor rear end cover. The lower end of the second guide shaft is used for a detachable coaxial fixed connection with one end of the rotor shaft of the rotor sub-assembly of the electric drive assembly away from the gearbox. The second guide shaft is used for a sliding guide engagement with the rotor shaft hole and the first center hole. The output end of the drive mechanism is fixedly connected to the upper end of the sleeve assembly. The drive mechanism is used to drive the rear end cover of the motor to rotate around its central axis and move in the horizontal plane. The drive mechanism is also used to drive the rear end cover of the motor to press down and move up. The sleeve assembly includes a connecting flange and a sleeve, wherein the first central hole is the inner hole of the sleeve; the connecting flange has a second central hole, the sleeve passes through the second central hole, and the sleeve slides and guides with the second central hole; The connecting flange is used for bolt connection with the rear end face of the motor rear end cover; A flange is provided on the outer side of the sleeve, and the upper side of the flange is used to abut against the lower side of the flange to restrict the sliding of the sleeve in the second central hole; The upper end of the sleeve is fixedly connected to the output end of the drive mechanism.

2. The disassembly and assembly device for the electric drive assembly according to claim 1, characterized in that: The disassembly and assembly device for the electric drive assembly also includes a wave spring positioning sleeve; The wave spring positioning sleeve is used to be sleeved on the end of the rotor shaft away from the gearbox. The lower end face of the wave spring positioning sleeve is used to fit against the bearing installed on the end of the rotor shaft away from the gearbox. The outer peripheral surface of the wave spring positioning sleeve is used to cooperate with the inner peripheral surface of the wave spring of the electric drive assembly. A first boss is provided on the lower end face of the second guide shaft. The first boss is used to insert into the inner hole of the wave spring positioning sleeve from the top. The outer peripheral surface of the first boss is engaged with the inner peripheral surface of the inner hole of the wave spring positioning sleeve. An external thread is provided on the lower end face of the first boss. The external thread is used to connect with the internal thread on the end of the rotor shaft away from the gearbox. The shoulder of the first boss is used to abut against the upper end face of the wave spring positioning sleeve.

3. The disassembly and assembly device for the electric drive assembly according to claim 1, characterized in that, The support frame includes: a support base plate, an input shaft position support block, an intermediate shaft position support block, and an output shaft position support block, which are fixedly installed on the support base plate; The upper end face of the input shaft position support block is used to support the outer edge of the input shaft hole on the front end face of the gearbox; The upper end face of the intermediate shaft position support block is used to support the outer edge of the intermediate shaft hole on the front end face of the gearbox. The upper end face of the output shaft position support block is used to support the outer edge of the output shaft hole on the front end face of the gearbox; The upper surface of the input shaft position support block is provided with a second boss, the upper surface of the intermediate shaft position support block is provided with a third boss, and the upper surface of the output shaft position support block is provided with a fourth boss. The second boss, the third boss, and the fourth boss are used to pass through the input shaft hole, the intermediate shaft hole, and the output shaft hole, respectively, when positioning the gearbox; The outer peripheral surface of the second boss mates with the inner surface of the input shaft hole, the outer peripheral surface of the third boss mates with the inner surface of the intermediate shaft hole, and the outer peripheral surface of the fourth boss mates with the inner surface of the output shaft hole.

4. The disassembly and assembly device for the electric drive assembly according to claim 1, characterized in that: The fixing unit includes multiple locking mechanisms that correspond one-to-one with each lifting lug on the side of the gearbox, and each locking mechanism is fixedly installed on the support frame; The locking mechanism is used to bolt the corresponding lifting lug after the gearbox is positioned, or to press down the corresponding lifting lug to fix the positioned gearbox on the support frame.

5. A method for installing an electric drive assembly, characterized in that, The installation is achieved using the disassembly and assembly device for the electric drive assembly as described in any one of claims 1-4, and the installation method includes: The gearbox of the electric drive assembly is supported and positioned using a support frame; The gearbox, after being positioned, is fixed onto the support frame using a fixing unit; A first guide shaft is threaded into at least two motor housing connection holes on the rear end face of the gearbox, and the rotor sub-assembly of the electric drive assembly is installed into the input shaft hole on the rear end face of the gearbox. The stator and motor housing sub-assembly of the electric drive assembly are clamped and fixed using the first motion unit; The first motion unit drives the stator and motor housing sub-assembly to rotate around its central axis and move in the horizontal plane, so that the gearbox housing connection holes on the front end face of the stator and motor housing sub-assembly are aligned with the corresponding motor housing connection holes on the rear end face of the gearbox. The first motion unit drives the stator and motor housing sub-assembly to press down, so that each of the first guide shafts passes through the corresponding gearbox housing connection hole on the front end face of the stator and motor housing sub-assembly until the front end face of the stator and motor housing sub-assembly is pressed down to fit against the rear end face of the gearbox. After removing each of the first guide shafts, the connection between the stator and motor housing sub-assembly and the gearbox is completed; The rear end cover of the motor of the electric drive assembly is mounted onto the second motion unit; The second motion unit drives the rear end cover of the motor to rotate around its central axis and move in the horizontal plane to complete the positioning between the stator and motor housing sub-assembly and the rear end cover of the motor. The second motion unit drives the rear end cover of the motor to press down, completing the assembly between the rear end cover of the motor and the stator and motor housing sub-assembly.

6. The installation method of the drive assembly according to claim 5, characterized in that: After installing the rotor sub-assembly of the electric drive assembly into the input shaft hole on the rear end face of the gearbox; the wave spring positioning sleeve is sleeved on the end of the rotor shaft of the rotor sub-assembly away from the gearbox, and the lower end face of the wave spring positioning sleeve is in contact with the bearing installed on the end of the rotor shaft away from the gearbox; the wave spring of the electric drive assembly is sleeved on the outer circumferential surface of the wave spring positioning sleeve; and then the stator and motor housing sub-assembly of the electric drive assembly are clamped and fixed by the first motion unit. After completing the connection between the stator and motor housing sub-assembly and the gearbox, the first boss on the lower end face of the second guide shaft is inserted from the top into the inner hole of the wave spring positioning sleeve and threaded to the end of the rotor shaft away from the gearbox. After the shoulder of the first boss abuts against the upper end face of the wave spring positioning sleeve, the rear end cover of the motor of the electric drive assembly is installed on the second motion unit.

7. A method for disassembling an electric drive assembly, characterized in that, The disassembly is achieved using the disassembly and assembly device for the electric drive assembly as described in any one of claims 1-4, wherein the disassembly method includes: The gearbox of the electric drive assembly is supported and positioned using a support frame, thereby completing the positioning of the electric drive assembly; The positioned electric drive assembly is fixed onto the support frame using a fixing unit; Remove the connecting bolts between the motor rear end cover of the electric drive assembly and the stator and motor housing sub-assembly of the electric drive assembly; Complete the fixed connection between the second motion unit and the rear end cover of the motor; The second motion unit drives the rear end cover of the motor to move upward, thereby completing the removal of the rear end cover of the motor; Remove the connecting bolts between the stator and motor housing sub-assembly and the gearbox of the electric drive assembly; A first guide shaft is inserted into each of the at least two gearbox housing connection holes of the stator and motor housing sub-assembly, and each of the first guide shafts is threaded to the corresponding motor housing connection hole on the rear end face of the gearbox. The stator and motor housing sub-assembly are clamped and fixed using the first motion unit; The first motion unit drives the stator and motor housing sub-assembly to move upward, thereby completing the separation between the stator and motor housing sub-assembly and the rotor sub-assembly of the electric drive assembly; The rotor subassembly is removed from the input shaft hole on the rear end face of the gearbox, thus completing the disassembly of the electric drive assembly.

8. The method for disassembling the drive assembly according to claim 7, characterized in that: After removing the connecting bolts between the motor rear end cover of the electric drive assembly and the stator and motor housing sub-assembly of the electric drive assembly; insert the lower end of the second guide shaft into the rotor shaft hole on the motor rear end cover and thread it to the end of the rotor shaft of the rotor sub-assembly away from the gearbox, and then complete the fixed connection between the second motion unit and the motor rear end cover. The method for completing the fixed connection between the second motion unit and the rear end cover of the motor includes: fixing the sleeve assembly of the second motion unit to the rear end face of the rear end cover of the motor, and inserting the upper end of the second guide shaft into the first central hole of the sleeve assembly; and then fixing the output end of the drive mechanism of the second motion unit to the upper end of the sleeve assembly.

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