Dismounting and mounting device, mounting method and dismounting method of electric drive assembly

Abstract

The invention belongs to the technical field of vehicle engineering, and particularly relates to a dismounting device, a mounting method and a dismounting method.The dismounting device comprises a supporting frame used for supporting the front end of a reduction gearbox of the electric drive assembly so as to position the reduction gearbox and enable the rear end of the reduction gearbox to face upwards; the fixing unit is used for fixing the positioned reduction gearbox on the supporting frame; the first movement unit is used for clamping and fixing a stator and a motor shell sub-assembly of the electric driving assembly, and is used for driving the stator and the motor shell sub-assembly to rotate around a central shaft of the stator and the motor shell sub-assembly, move, press down and move up in a horizontal plane; the first guide shafts are used for being inserted into motor shell connecting holes in the rear end face of a reduction gearbox and are in threaded connection with the motor shell connecting holes, and the second guide shafts are used for being detachably and fixedly connected with the rear end of a motor rear end cover of an electric drive assembly. And the second motion unit is used for driving the motor rear end cover to rotate around the central shaft of the motor rear end cover, and moving, pressing down and moving up in a horizontal plane.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle engineering, and in particular relates to a disassembly and assembly device, an installation method and a disassembly method of an electric drive assembly. Background Art

[0002] During the prototype trial production of the electric drive assembly, it is often necessary to disassemble and assemble the stator and motor housing subassembly and the rotor subassembly of the electric drive assembly. In the process of putting the stator and motor housing subassembly on the outside of the rotor subassembly (assembly between the stator and motor housing subassembly and the rotor subassembly), and pulling the stator and motor housing subassembly out of the subassembly (disassembly between the stator and motor housing subassembly and the rotor subassembly), without the assistance of special tooling, it is very easy for the rotor magnetic isolation plate to rub against the copper wire at the end of the stator, resulting in the risk of damage to the insulation skin.

[0003] In order to solve the above problems, the existing disassembly and assembly devices of the electric drive assembly usually adopt a method of setting a guide pin shaft on the assembly table as an auxiliary tool to guide the driving direction of the driving mechanism that drives the stator and motor housing subassembly or the rotor subassembly to move, so as to reduce the friction between the rotor magnetic isolation plate and the copper wire at the end of the stator during the disassembly and assembly of the stator and motor housing subassembly and the rotor subassembly of the electric drive assembly;

[0004] However, the existing disassembly and assembly device of the electric drive assembly lacks coaxial positioning and fixation of the stator and motor housing subassembly and the rotor subassembly, as well as coaxial guiding during the mutual movement of the stator and motor housing subassembly and the rotor subassembly during the disassembly and assembly of the stator and motor housing subassembly and the rotor subassembly of the electric drive assembly. As a result, when the existing disassembly and assembly device of the electric drive assembly is used, it is often difficult to ensure the coaxiality of the stator and motor housing subassembly and the rotor subassembly due to factors such as radial runout and tilt, which in turn causes friction between the rotor magnetic isolation plate and the stator end copper wire during the disassembly and assembly of the stator and motor housing subassembly of the electric drive assembly, and the damage to the stator insulation skin cannot be eliminated, which easily leads to installation errors and the risk of product scrapping. Summary of the invention

[0005] In order to solve the defects of the above-mentioned prior art, the present invention provides a disassembly and assembly device, an installation method and a disassembly method of an electric drive assembly to solve the problem that when using the existing disassembly and assembly device of the electric drive assembly, it is often difficult to ensure the coaxiality of the stator and motor housing subassembly and the rotor subassembly due to radial runout, tilt and other factors during the disassembly and assembly of the stator and motor housing subassembly and the rotor subassembly of the electric drive assembly, thereby causing friction between the rotor magnetic isolation plate and the copper wire at the end of the stator during the disassembly and assembly of the stator and motor housing subassembly and the rotor subassembly of the electric drive assembly, and the damage to the stator insulation skin cannot be eliminated, which easily leads to installation errors and the risk of product scrapping.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

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

[0008] A support frame; the support frame is used to support the front end of the reduction box of the electric drive assembly to position the reduction box and make the rear end of the reduction box face upward;

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

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

[0011] A first guide shaft, one end of which is used to be inserted into the motor housing connection hole on the rear end face of the reduction gearbox and threadedly connected to the motor housing connection hole, and a plurality of the first guide shafts are respectively connected to different motor housing connection holes; the first guide shaft is used to slide and guide with the corresponding reduction 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 subassembly and the motor rear end cover. The second motion unit is also used to drive the motor rear end cover to be pressed down and moved up.

[0013] The support frame is used to support the front end of the reduction gearbox of the electric drive assembly to position the reduction gearbox and make the rear end of the reduction gearbox face upward, thereby supporting the reduction gearbox and realizing the axial positioning of the rotor sub-assembly installed in the input shaft hole on the rear end surface of the reduction gearbox. The fixed unit is used to fix the positioned reduction gearbox on the support frame, thereby realizing the fixation of the rotor assembly that has completed the axial positioning; and the first motion unit is used to clamp and fix the stator and motor housing sub-assembly, and drive the stator and motor housing sub-assembly to rotate around its center axis and move in the horizontal plane, thereby realizing the axial positioning of the stator and motor housing sub-assembly (that is, realizing the axial positioning of the stator). By completing the axial positioning of the rotor sub-assembly and the axial positioning of the stator and motor housing sub-assembly, the coaxial positioning between the rotor sub-assembly and the stator and motor housing sub-assembly can be completed.

[0014] In the process of the first motion unit driving the stator and motor housing subassembly to press down (implementing the assembly of the rotor subassembly and the stator and motor housing subassembly), and the first motion unit driving the stator and motor housing subassembly to move up (implementing the disassembly of the rotor subassembly and the stator and motor housing subassembly), the coaxial guiding function of the stator and motor housing subassembly and the rotor subassembly during the mutual movement can be realized by making each of the first guide shafts slide and guide with the corresponding reduction gearbox housing connecting hole on the front end surface of the stator and motor housing subassembly, and limiting the relative radial displacement between the stator and motor housing subassembly and the rotor subassembly, thereby assisting in strengthening the coaxial positioning and fixing effect between the stator and motor housing subassembly and the rotor subassembly, and avoiding radial runout and tilting during the disassembly and assembly of the stator and motor housing subassembly and the rotor subassembly of the electric drive assembly, thereby ensuring the coaxiality of the stator and motor housing subassembly and the rotor subassembly. The invention solves the technical problem that, in the process of disassembling and assembling the stator and motor housing subassembly and the rotor subassembly of the electric drive assembly, it is often difficult to ensure the coaxiality of the stator and motor housing subassembly and the rotor subassembly due to factors such as radial runout and tilt, which further causes friction between the rotor magnetic isolation plate and the copper wire at the end of the stator during the process of disassembling and assembling the stator and motor housing subassembly and the rotor subassembly of the electric drive assembly, and the damage to the stator insulation skin cannot be eliminated, which easily leads to installation errors and the risk of product scrapping.

[0015] Wherein, the stator and motor housing subassembly comprises a motor housing and a stator which is thermally sleeved into the motor housing;

[0016] Among them, the positioning between the stator and motor housing subassembly and the reduction gearbox is completed, that is, the reduction gearbox housing connection holes on the front end surface of the stator and motor housing subassembly are aligned with the corresponding motor housing connection holes on the rear end surface of the reduction gearbox.

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

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

[0019] The sleeve assembly is used to be detachably fixedly connected to the rear end surface of the rear end cover of the motor, and a first center hole coaxially arranged with the rotor shaft hole on the rear end cover of the motor is opened in the sleeve assembly;

[0020] The lower end of the second guide shaft is used for being detachably coaxially fixedly connected with the end of the rotor shaft of the rotor sub-assembly of the electric drive assembly away from the reduction box, and the second guide shaft is used for slidingly guiding with the rotor shaft hole and the first center hole;

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

[0022] By making the second guide shaft cooperate with the rotor shaft hole and the first center hole for sliding guidance, the coaxial guiding function of the stator and motor housing subassembly and the rear end cover of the motor during the mutual movement can be realized, and then in the process of installing or disassembling the stator and motor housing subassembly and the rear end cover of the motor using the disassembly and assembly device of the electric drive assembly provided by the present invention, the coaxiality between the stator and motor housing subassembly and the rear end cover of the motor can be maintained at all times, thereby preventing the concave stop on the rear end face of the stator and motor housing subassembly and the convex stop on the front end face of the rear end cover of the motor from colliding and cutting due to the coaxiality between the stator and motor housing subassembly and the rear end cover of the motor not meeting the requirements during the installation or disassembly process, thereby damaging the concave stop and the convex stop, and also preventing the debris generated by the collision and cutting from falling into the winding on the stator of the stator and motor housing subassembly.

[0023] Further, the sleeve assembly includes a connecting flange and a sleeve, the first center hole is the inner hole of the sleeve; a second center hole is opened on the connecting flange, the sleeve passes through the second center hole, and the sleeve and the second center hole are slidably guided and matched;

[0024] The connecting flange is used to be bolted to the rear end surface of the rear end cover of the motor;

[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 limit the sliding of the sleeve in the second center hole;

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

[0027] Furthermore, the disassembly and assembly device of 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 reduction box, the lower end surface of the wave spring positioning sleeve is used to fit with the bearing installed on the end of the rotor shaft away from the reduction box, and the outer circumferential surface of the wave spring positioning sleeve is used to match with the inner circumferential surface of the wave spring of the electric drive assembly;

[0029] A first boss is provided on the lower end surface of the second guide shaft, and the first boss is used to be inserted into the inner hole of the wave spring positioning sleeve from the upper side, and the outer circumferential surface of the first boss matches the inner circumferential surface of the inner hole of the wave spring positioning sleeve; an external thread is provided on the lower end surface of the first boss, and the external thread is used to be threadedly connected with the internal thread on the end of the rotor shaft away from the reduction box; the shoulder of the first boss is used to abut against the upper end surface of the wave spring positioning sleeve.

[0030] By providing the wave spring positioning sleeve and making the outer circumference of the wave spring positioning sleeve cooperate with the inner circumference of the wave spring of the electric drive assembly, the wave spring can be sleeved outside the wave spring positioning sleeve to solve the problem of difficulty in centering the wave spring when it is installed on the rotor shaft (because the inner diameter of the wave spring is usually larger than the outer diameter of the sleeved part on the rotor shaft), thereby solving the technical problem of the wave spring being squeezed and damaged by the rear end cover of the motor due to the centering deviation of the wave spring installed on the rotor shaft during the installation of the stator and motor housing subassembly and the rear end cover of the motor.

[0031] Further, 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 surface of the input shaft position support block is used to support the outer edge of the input shaft hole on the front end surface of the reduction box;

[0033] The upper end surface of the intermediate shaft position support block is used to support the outer edge of the intermediate shaft hole on the front end surface of the reduction box;

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

[0035] A second boss is provided on the upper end surface of the input shaft position support block, a third boss is provided on the upper end surface of the intermediate shaft position support block, and a fourth boss is provided on the upper end surface of the output shaft position support block;

[0036] The second boss, the third boss, and the fourth boss are used to penetrate the input shaft hole, the intermediate shaft hole, and the output shaft hole respectively when positioning the reduction box;

[0037] The outer circumferential surface of the second boss matches with the inner side surface of the input shaft hole, the outer circumferential surface of the third boss matches with the inner side surface of the intermediate shaft hole, and the outer circumferential surface of the fourth boss matches with the inner side 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, stable three-point support can be achieved for the reduction gearbox. Then, by setting the second boss, the third boss and the fourth boss, when positioning the reduction gearbox, they are respectively inserted into the input shaft hole, the intermediate shaft hole and the output shaft hole, and the outer circumferential surface of the second boss is matched with the inner side surface of the input shaft hole, the outer circumferential surface of the third boss is matched with the inner side surface of the intermediate shaft hole, and the outer circumferential surface of the fourth boss is matched with the inner side surface of the output shaft hole. The reduction gearbox can be positioned and its horizontal movement can be restricted, thereby achieving radial limitation of the rotor sub-assembly installed on the reduction gearbox. During the disassembly and assembly of the electric drive assembly, radial runout and tilt of the rotor sub-assembly can be effectively avoided.

[0039] Furthermore, the fixing unit includes a plurality of locking mechanisms arranged one by one corresponding to each lifting ear on the side of the reduction box, and each of the locking mechanisms is fixedly mounted on the support frame;

[0040] The locking mechanism is used to bolt the corresponding lifting lugs or press down the corresponding lifting lugs after the reduction box is positioned, so as to fix the positioned reduction box on the support frame.

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

[0042] Using a support frame to support and position a reduction gearbox of the electric drive assembly;

[0043] Fixing the positioned reduction gearbox on the support frame by using a fixing unit;

[0044] The first guide shaft is threadedly connected to at least two motor housing connection holes on the rear end face of the reduction box, and the rotor sub-assembly of the electric drive assembly is installed at the input shaft hole on the rear end face of the reduction box;

[0045] Using the first motion unit to clamp and fix the stator and motor housing subassembly of the electric drive assembly;

[0046] The first motion unit is used to drive the stator and motor housing subassembly to rotate around its central axis and move in a horizontal plane, so that each reduction gearbox housing connection hole on the front end surface of the stator and motor housing subassembly is aligned with the corresponding motor housing connection hole on the rear end surface of the reduction gearbox;

[0047] The stator and motor housing subassembly is driven downward by the first motion unit, so that each of the first guide shafts is respectively inserted into the corresponding reduction gearbox housing connection hole on the front end surface of the stator and motor housing subassembly, until the front end surface of the stator and motor housing subassembly is pressed downward to fit with the rear end surface of the reduction gearbox;

[0048] After removing each of the first guide shafts, the connection between the stator and motor housing subassembly and the reduction box is completed;

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

[0050] The second motion unit is used to drive the rear end cover of the motor to rotate around its central axis and move in a horizontal plane, so as to complete the positioning between the stator and motor housing subassembly and the rear end cover of the motor;

[0051] The second motion unit is used to drive the rear end cover of the motor to be pressed down, so as to complete the assembly between the rear end cover of the motor and the stator and motor housing subassembly.

[0052] Further, after the rotor sub-assembly of the electric drive assembly is installed at the input shaft hole on the rear end face of the reduction box; a wave spring positioning sleeve is sleeved on the end of the rotor shaft of the rotor sub-assembly away from the reduction box, and the lower end face of the wave spring positioning sleeve is fitted with the bearing installed on the end of the rotor shaft away from the reduction box; the wave spring of the electric drive assembly is sleeved on the outer peripheral surface of the wave spring positioning sleeve; and the stator and motor housing sub-assembly of the electric drive assembly are clamped and fixed by the first motion unit;

[0053] After completing the connection between the stator and motor housing subassembly and the reduction gearbox, insert the first boss on the lower end surface of the second guide shaft from the upper side into the inner hole of the wave spring positioning sleeve and threadedly connect it to the end of the rotor shaft away from the reduction gearbox, and after the shoulder of the first boss is abutted against the upper end surface of the wave spring positioning sleeve, install the rear end cover of the motor of the electric drive assembly onto the second motion unit.

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

[0055] The support frame is used to support and position the reduction gearbox of the electric drive assembly, thereby completing the positioning of the electric drive assembly;

[0056] Fixing the positioned electric drive assembly on 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 subassembly of the electric drive assembly;

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

[0059] Using the second motion unit to drive the rear end cover of the motor to move upward, so as to complete the removal of the rear end cover of the motor;

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

[0061] Insert a first guide shaft into each of at least two reduction gearbox housing connection holes of the stator and motor housing subassembly, and thread each of the first guide shafts into a corresponding motor housing connection hole on the rear end surface of the reduction gearbox;

[0062] Using the first motion unit to clamp and fix the stator and motor housing subassembly;

[0063] Using the first motion unit to drive the stator and motor housing sub-assembly to move upward, so as to complete the separation between the stator and motor housing sub-assembly and the rotor sub-assembly of the electric drive assembly;

[0064] The rotor sub-assembly is removed from the input shaft hole on the rear end face of the reduction box to complete the disassembly of the electric drive assembly.

[0065] Furthermore, after removing the connecting bolts between the rear end cover of the motor of the electric drive assembly and the stator and motor housing sub-assembly of the electric drive assembly; inserting the lower end of the second guide shaft into the rotor shaft hole on the rear end cover of the motor and threading it with the end of the rotor shaft of the rotor sub-assembly away from the reduction box, the fixed connection between the second motion unit and the rear end cover of the motor is completed;

[0066] The method for completing the fixed connection between the second motion unit and the rear end cover of the motor includes: fixedly connecting the sleeve assembly of the second motion unit to the rear end surface of the rear end cover of the motor, and passing the upper end of the second guide shaft through the first center hole of the sleeve assembly; and then fixedly connecting the output end of the driving mechanism of the second motion unit to the upper end of the sleeve assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

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

[0070] Figure 3 Schematic diagram of the assembled structure of the stator and motor housing subassembly and the rotor subassembly in the embodiment;

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

[0072] Figure 5 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 It is a schematic diagram of the assembled structure of the rear end cover of the motor, the stator and the motor housing subassembly in the embodiment;

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

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

[0076] Fig. 9 is a schematic structural diagram of the first guide shaft in the embodiment;

[0077] Fig.10 is a schematic diagram of the three-dimensional structure of the second guide shaft in the embodiment;

[0078] Fig.11 is a schematic structural diagram of a support frame and a fixing unit in an embodiment;

[0079] Among them, 1 is a reduction gearbox, 2 is a stator and motor housing subassembly, 3 is a first guide shaft, 4 is a motor rear end cover, 5 is a rotor subassembly, 6 is a second guide shaft, 7 is a sleeve assembly, 8 is a wave spring positioning sleeve, 9 is a bearing, 10 is a wave spring, 11 is a support base plate, 12 is an input shaft position support block, 13 is an intermediate shaft position support block, 14 is an output shaft position support block, 15 is a suspension hole position support block, and 16 is a 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—Vertical column, 16.2—Horizontal rotating plate, 16.3—Locking knob. DETAILED DESCRIPTION

[0088] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0089] Embodiment 1:

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

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

[0092] A fixing unit, which is installed on the support frame and is used to fix the positioned reduction gearbox 1 on the support frame;

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

[0094] A first guide shaft 3, one end of which is used to be inserted into the motor housing connection hole on the rear end face of the reduction box 1 and is threadedly connected to the motor housing connection hole, and a plurality of first guide shafts 3 are respectively connected to different motor housing connection holes; the first guide shaft 3 is used to slide and guide with the corresponding reduction box 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 be detachably fixedly connected to 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 subassembly 2 and the motor rear end cover 4. The second motion unit is also used to drive the motor rear end cover 4 to be pressed down and moved up.

[0096] A support frame is used to support the front end of the reduction gearbox 1 of the electric drive assembly to position the reduction gearbox 1 and make the rear end of the reduction gearbox 1 face upward, thereby supporting the reduction gearbox 1 and realizing the axial positioning of the rotor subassembly 5 installed in the input shaft hole on the rear end face of the reduction gearbox 1. The positioned reduction gearbox 1 is fixed to the support frame by a fixing unit, thereby realizing the fixation of the rotor assembly that has completed the axial positioning; and the first motion unit is used to clamp and fix the stator and motor housing subassembly 2, and drive the stator and motor housing subassembly 2 to rotate around its center axis and move in the horizontal plane, thereby realizing the axial positioning of the stator and motor housing subassembly 2 (that is, realizing the axial positioning of the stator), and by completing the axial positioning of the rotor subassembly 5 and the axial positioning of the stator and motor housing subassembly 2, the coaxial positioning between the rotor subassembly 5 and the stator and motor housing subassembly 2 can be completed.

[0097] In the process of the first motion unit driving the stator and motor housing subassembly 2 to press down (implementing the assembly of the rotor subassembly 5 and the stator and motor housing subassembly 2), and the first motion unit driving the stator and motor housing subassembly 2 to move up (implementing the disassembly of the rotor subassembly 5 and the stator and motor housing subassembly 2), by making each first guide shaft 3 slide and guide with the corresponding reduction gearbox housing connecting hole on the front end surface of the stator and motor housing subassembly 2, the coaxial guiding function of the stator and motor housing subassembly 2 and the rotor subassembly 5 during the mutual movement can be realized, and the relative radial displacement between the stator and motor housing subassembly 2 and the rotor subassembly 5 can be limited, thereby assisting in strengthening the coaxial positioning and fixing effect between the stator and motor housing subassembly 2 and the rotor subassembly 5, and avoiding radial runout and tilting during the disassembly and assembly of the stator and motor housing subassembly 2 and the rotor subassembly 5 of the electric drive assembly, thereby ensuring the coaxiality of the stator and motor housing subassembly 2 and the rotor subassembly 5. The invention solves the problem that, in the process of disassembling and assembling the stator and motor housing subassembly 2 and the rotor subassembly 5 of the electric drive assembly, it is often difficult to ensure the coaxiality of the stator and motor housing subassembly 2 and the rotor subassembly 5 due to radial runout, tilt and other factors, which further causes friction between the rotor magnetic isolation plate and the copper wire at the end of the stator during the process of disassembling and assembling the stator and motor housing subassembly 2 and the rotor subassembly 5 of the electric drive assembly, and the damage to the stator insulation skin cannot be eliminated, which easily leads to installation errors and the risk of product scrapping.

[0098] Wherein, the stator and motor housing subassembly 2 includes a motor housing and a stator which is thermally fitted into the motor housing;

[0099] Among them, the positioning between the stator and motor housing subassembly 2 and the reduction gearbox 1 is completed, that is, the reduction gearbox housing connection holes on the front end surface of the stator and motor housing subassembly 2 are aligned with the corresponding motor housing connection holes on the rear end surface of the reduction gearbox 1.

[0100] Preferably, in this embodiment 1, Fig. 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 connecting hole, and 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 reduction gearbox housing connecting hole on the front end surface of the stator and motor housing sub-assembly 2 for sliding guidance; a first clamping groove 3.2 is opened on the outer peripheral surface of the first guide shaft 3, and the first clamping groove 3.2 is arranged on the side close to the second end. The operator can screw the first guide shaft 3 into and out of the corresponding reduction gearbox housing connecting hole by clamping the first clamping groove 3.2 with a tool such as a wrench.

[0101] In one embodiment, if Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig.10 As shown, the disassembly and assembly device of the electric drive assembly further 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 surface of the motor rear end cover 4, and a first center hole 7.2.1 is provided in the sleeve assembly 7 and 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 to be detachably coaxially fixedly connected to the end of the rotor shaft 5.1 of the rotor sub-assembly 5 of the electric drive assembly away from the reduction box 1, and the second guide shaft 6 is used to slide and guide with the rotor shaft hole 4.1 and the first center hole 7.2.1;

[0104] The output end of the driving mechanism is fixedly connected to the upper end of the sleeve assembly 7. The driving 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 driving mechanism is also used to drive the rear end cover 4 of the motor to press down and move up.

[0105] By making the second guide shaft 6 cooperate with the rotor shaft hole 4.1 and the first center hole 7.2.1 for sliding guidance, the coaxial guiding function of the stator and motor housing subassembly 2 and the motor rear end cover 4 during the mutual movement can be realized, and then in the process of installing or disassembling the stator and motor housing subassembly 2 and the motor rear end cover 4 using the disassembly and assembly device of the electric drive assembly provided by the present invention, the coaxiality between the stator and motor housing subassembly 2 and the motor rear end cover 4 can be always maintained, thereby preventing the concave stop on the rear end face of the stator and motor housing subassembly 2 and the convex stop on the front end face of the motor rear end cover 4 from colliding and cutting due to the coaxiality between the stator and motor housing subassembly 2 and the motor rear end cover 4 not meeting the requirements during the installation or disassembly process, thereby damaging the concave stop and the convex stop, and also preventing the debris generated by the collision and cutting from falling into the winding on the stator of the stator and motor housing subassembly 2.

[0106] Preferably, in this embodiment 1, Figures 5 to 8 As shown, the sleeve assembly 7 comprises a connecting flange 7.1 and a sleeve 7.2, wherein the first center hole 7.2.1 is the inner hole of the sleeve 7.2; a second center hole is formed on the connecting flange 7.1, and the sleeve 7.2 passes through the second center hole, and the sleeve 7.2 is slidably guided with the second center hole;

[0107] The connecting flange 7.1 is used for bolt connection with 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, and 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 center hole;

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

[0110] Preferably, in this embodiment 1, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Fig.10 As shown, the disassembly and assembly device of 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 reduction box 1, the lower end surface 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 reduction box 1, and the outer peripheral surface of the wave spring positioning sleeve 8 is used to match 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 surface of the second guide shaft 6. The first boss 6.1 is used to be inserted into the inner hole of the wave spring positioning sleeve 8 from the upper side, and the outer circumferential surface of the first boss 6.1 matches with the inner circumferential 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 surface of the first boss 6.1. The second external thread 6.1.1 is used to be threadedly connected with the internal thread on the end of the rotor shaft 5.1 away from the reduction box 1; the shoulder of the first boss 6.1 is used to abut against the upper end surface of the wave spring positioning sleeve 8.

[0113] By providing a wave spring positioning sleeve 8 and making the outer circumference of the wave spring positioning sleeve 8 cooperate with the inner circumference of the wave spring 10 of the electric drive assembly, the wave spring 10 can be sleeved outside the wave spring positioning sleeve 8 to solve the problem of difficulty in centering the wave spring 10 when it is installed on the rotor shaft 5.1 (because the inner diameter of the wave spring 10 is usually larger than the outer diameter of the sleeve portion on the rotor shaft 5.1), thereby solving the technical problem of the wave spring 10 being squeezed and damaged by the motor rear end cover 4 due to the centering deviation of the wave spring 10 when installed on the rotor shaft 5.1 during the installation of the stator and motor housing subassembly 2 and the motor rear end cover 4.

[0114] Preferably, in this embodiment 1, Fig.10As shown, a second clamping groove 6.2 is formed on the outer circumferential surface of the second guide shaft 6, and the second clamping groove 6.2 is arranged on a side away from the first boss 6.1. The operator can screw the second external thread 6.1.1 into or out of the internal thread on the end of the rotor shaft 5.1 away from the reduction box 1 by clamping the second clamping groove 6.2 with a tool such as a wrench.

[0115] In one embodiment, if Fig.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 fixedly mounted on the support base plate 11;

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

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

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

[0119] A second boss (not shown in the figure) is arranged on the upper end surface of the input shaft position support block 12, a third boss (not shown in the figure) is arranged on the upper end surface of the intermediate shaft position support block 13, and a fourth boss (not shown in the figure) is arranged on the upper end surface of the output shaft position support block 14;

[0120] The second boss, the third boss, and the fourth boss are used to penetrate the input shaft hole, the intermediate shaft hole, and the output shaft hole respectively when positioning the reduction box 1;

[0121] The outer circumferential surface of the second boss matches with the inner side surface of the input shaft hole, the outer circumferential surface of the third boss matches with the inner side surface of the intermediate shaft hole, and the outer circumferential surface of the fourth boss matches with the inner side 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, the reduction box 1 can be stably supported at three points. Then, by setting the second boss, the third boss and the fourth boss, they are respectively inserted into the input shaft hole, the intermediate shaft hole and the output shaft hole when positioning the reduction box 1, and the outer peripheral surface of the second boss is matched with the inner side surface of the input shaft hole, the outer peripheral surface of the third boss is matched with the inner side surface of the intermediate shaft hole, and the outer peripheral surface of the fourth boss is matched with the inner side surface of the output shaft hole. The reduction box 1 can be positioned and the horizontal movement of the reduction box 1 can be restricted, thereby realizing the radial limitation of the rotor sub-assembly 5 installed on the reduction box 1. During the disassembly and assembly of the electric drive assembly, the radial runout and tilt of the rotor sub-assembly 5 can be effectively avoided.

[0123] Preferably, in this embodiment 1, Fig.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 surface of the reduction box 1, and the other suspension hole position support block 15 is used to support the outer edge of another suspension hole on the front end surface of the reduction box 1;

[0124] A fifth boss (not shown) is provided on the upper end surface of the suspension hole position support block 15, and the fifth boss is used to penetrate into the corresponding suspension hole when positioning the reduction box 1; the outer peripheral surface of the fifth boss matches the inner side surface of the suspension hole.

[0125] In one embodiment, if Fig.11 As shown, the fixing unit includes a plurality of locking mechanisms 16 which are arranged one by one corresponding to each lifting ear on the side of the reduction box 1, and each locking mechanism 16 is fixedly mounted on the support frame;

[0126] The locking mechanism 16 is used to bolt the corresponding lifting lugs or press down the corresponding lifting lugs after the reduction box 1 is positioned, so as to fix the positioned reduction box 1 on the support frame.

[0127] There are many configuration schemes for the locking mechanism 16 , as long as the positioned reduction box 1 is fixed on the support frame. In this embodiment, two of the schemes are listed.

[0128] Among them, in the solution where the locking mechanism 16 is used to press down the corresponding lifting eye after the reduction box 1 completes positioning, the locking mechanism 16 can use a pressing cylinder.

[0129] The locking mechanism 16 is used in the solution of bolting the corresponding lifting lugs after the reduction box 1 is positioned, such as Fig.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 supporting base plate 11, and one end of the horizontal rotating plate 16.2 is hingedly connected to the upper end of the column 16.1, so that the horizontal rotating plate 16.2 can rotate in a 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 corresponding hanging ear bolts, and the locking knob 16.3 is arranged 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 release the locking fixation of the horizontal rotating plate 16.2.

[0131] Embodiment 2:

[0132] According to the disassembly and assembly device of the electric drive assembly provided in the first embodiment, the second embodiment further provides an installation method of the electric drive assembly, and the installation method includes:

[0133] Using a support frame to support and position the reduction box 1 of the electric drive assembly;

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

[0135] The first guide shaft 3 is threadedly connected to at least two motor housing connection holes on the rear end face of the reduction box 1, and the rotor sub-assembly 5 of the electric drive assembly is installed to the input shaft hole on the rear end face of the reduction box 1;

[0136] The stator and motor housing subassembly 2 of the electric drive assembly are clamped and fixed by the first motion unit;

[0137] The first motion unit is used to drive the stator and motor housing subassembly 2 to rotate around its central axis and move in the horizontal plane, so that each reduction gearbox housing connection hole on the front end surface of the stator and motor housing subassembly 2 is aligned with the corresponding motor housing connection hole on the rear end surface of the reduction gearbox 1;

[0138] The stator and motor housing subassembly 2 is driven downward by the first motion unit, so that each first guide shaft 3 is respectively inserted into the corresponding reduction box housing connection hole on the front end surface of the stator and motor housing subassembly 2, until the front end surface of the stator and motor housing subassembly 2 is pressed down to fit with the rear end surface of the reduction box 1;

[0139] After removing each first guide shaft 3, the connection between the stator and motor housing subassembly 2 and the reduction box 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 is used to drive the motor rear end cover 4 to rotate around its central axis and move in a horizontal plane, so as to complete the positioning between the stator and motor housing subassembly 2 and the motor rear end cover 4;

[0142] The second motion unit is used to drive the rear end cover 4 of the motor to be pressed down, so as to complete the assembly between the rear end cover 4 of the motor and the stator and motor housing subassembly 2.

[0143] Preferably, in the present embodiment 2, the installation method further comprises: after installing the rotor sub-assembly 5 of the electric drive assembly to the input shaft hole on the rear end face of the reduction box 1; sleeve the wave spring positioning sleeve 8 on the end of the rotor shaft 5.1 of the rotor sub-assembly 5 away from the reduction box 1, and make the lower end face of the wave spring positioning sleeve 8 fit with the bearing 9 installed on the end of the rotor shaft 5.1 away from the reduction box 1; sleeve the wave spring 10 of the electric drive assembly on the outer peripheral surface of the wave spring positioning sleeve 8; and then use 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 subassembly 2 and the reduction gearbox 1, the first boss 6.1 on the lower end surface of the second guide shaft 6 is inserted from the upper side into the inner hole of the wave spring positioning sleeve 8 and threadedly connected to the end of the rotor shaft 5.1 away from the reduction gearbox 1, and the shoulder of the first boss 6.1 is abutted against the upper end surface of the wave spring positioning sleeve 8, and then the rear end cover 4 of the motor of the electric drive assembly is installed on the second motion unit.

[0145] Embodiment 3:

[0146] According to the disassembly and assembly device of the electric drive assembly provided in Example 1, Example 3 provides a disassembly method of the electric drive assembly, and the disassembly method includes:

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

[0148] The positioned electric drive assembly is fixed on the support frame by 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 subassembly 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 rear end cover 4 of the motor is driven upward by the second motion unit to complete the removal of the rear end cover 4 of the motor;

[0152] Remove the connecting bolts between the stator and motor housing subassembly 2 and the reduction box 1 of the electric drive assembly;

[0153] A first guide shaft 3 is inserted into each of at least two reduction gearbox housing connection holes of the stator and motor housing subassembly 2, and each first guide shaft 3 is threadedly connected to a corresponding motor housing connection hole on the rear end surface of the reduction gearbox 1;

[0154] Using the first motion unit to clamp and fix the stator and motor housing subassembly 2;

[0155] The stator and motor housing subassembly 2 is driven upward by the first motion unit to complete the separation between the stator and motor housing subassembly 2 and the rotor subassembly 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 reduction box 1 to complete the disassembly of the electric drive assembly.

[0157] Preferably, in the present 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 reduction box 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: fixedly connecting the sleeve assembly 7 of the second motion unit to the rear end surface of the rear end cover 4 of the motor, and allowing the upper end of the second guide shaft 6 to pass through the first center hole 7.2.1 of the sleeve assembly 7; and then fixedly connecting the output end of the driving mechanism of the second motion unit to the upper end of the sleeve assembly 7.

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

[0160] 1. A support frame is used to support the front end of the reduction gearbox 1 of the electric drive assembly to position the reduction gearbox 1 and make the rear end of the reduction gearbox 1 face upward, thereby supporting the reduction gearbox 1 and realizing the axial positioning of the rotor subassembly 5 installed in the input shaft hole on the rear end face of the reduction gearbox 1. The positioned reduction gearbox 1 is fixed to the support frame by a fixing unit, thereby realizing the fixation of the rotor assembly that has completed the axial positioning; and the first motion unit is used to clamp and fix the stator and motor housing subassembly 2, and drive the stator and motor housing subassembly 2 to rotate around its central axis and move in the horizontal plane, thereby realizing the axial positioning of the stator and motor housing subassembly 2 (that is, realizing the axial positioning of the stator), and by completing the axial positioning of the rotor subassembly 5 and the axial positioning of the stator and motor housing subassembly 2, the coaxial positioning between the rotor subassembly 5 and the stator and motor housing subassembly 2 can be completed.

[0161] In the process of the first motion unit driving the stator and motor housing subassembly 2 to press down (implementing the assembly of the rotor subassembly 5 and the stator and motor housing subassembly 2), and the first motion unit driving the stator and motor housing subassembly 2 to move up (implementing the disassembly of the rotor subassembly 5 and the stator and motor housing subassembly 2), by making each first guide shaft 3 slide and guide with the corresponding reduction gearbox housing connecting hole on the front end surface of the stator and motor housing subassembly 2, the coaxial guiding function of the stator and motor housing subassembly 2 and the rotor subassembly 5 during the mutual movement can be realized, and the relative radial displacement between the stator and motor housing subassembly 2 and the rotor subassembly 5 can be limited, thereby assisting in strengthening the coaxial positioning and fixing effect between the stator and motor housing subassembly 2 and the rotor subassembly 5, and avoiding radial runout and tilting during the disassembly and assembly of the stator and motor housing subassembly 2 and the rotor subassembly 5 of the electric drive assembly, thereby ensuring the coaxiality of the stator and motor housing subassembly 2 and the rotor subassembly 5. The invention solves the problem that, in the process of disassembling and assembling the stator and motor housing subassembly 2 and the rotor subassembly 5 of the electric drive assembly, it is often difficult to ensure the coaxiality of the stator and motor housing subassembly 2 and the rotor subassembly 5 due to radial runout, tilt and other factors, which further causes friction between the rotor magnetic isolation plate and the copper wire at the end of the stator during the process of disassembling and assembling the stator and motor housing subassembly 2 and the rotor subassembly 5 of the electric drive assembly, and the damage to the stator insulation skin cannot be eliminated, which easily leads to installation errors and the risk of product scrapping.

[0162] 2. By making the second guide shaft 6 cooperate with the rotor shaft hole 4.1 and the first center hole 7.2.1 for sliding guidance, the coaxial guiding function of the stator and motor housing subassembly 2 and the motor rear end cover 4 during the mutual movement can be realized, and then in the process of installing or disassembling the stator and motor housing subassembly 2 and the motor rear end cover 4 using the disassembly and assembly device of the electric drive assembly provided by the present invention, the coaxiality between the stator and motor housing subassembly 2 and the motor rear end cover 4 can be maintained, thereby preventing the concave stop on the rear end face of the stator and motor housing subassembly 2 and the convex stop on the front end face of the motor rear end cover 4 from colliding and cutting due to the coaxiality between the stator and motor housing subassembly 2 and the motor rear end cover 4 not meeting the requirements during the installation or disassembly process, thereby damaging the concave stop and the convex stop, and also preventing the debris generated by the collision and cutting from falling into the winding on the stator of the stator and motor housing subassembly 2.

[0163] 3. By providing a wave spring positioning sleeve 8 and making the outer circumference of the wave spring positioning sleeve 8 cooperate with the inner circumference of the wave spring 10 of the electric drive assembly, the wave spring 10 can be sleeved outside the wave spring positioning sleeve 8 to solve the problem of difficulty in centering the wave spring 10 when it is installed on the rotor shaft 5.1 (because the inner diameter of the wave spring 10 is usually larger than the outer diameter of the sleeve portion on the rotor shaft 5.1), thereby solving the technical problem that during the installation process of the stator and motor housing subassembly 2 and the motor rear end cover 4, the wave spring 10 is squeezed and damaged by the motor rear end cover 4 due to the centering deviation when the wave spring 10 is installed on the rotor shaft 5.1.

[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, the reduction box 1 can be stably supported at three points. Then, by setting the second boss, the third boss and the fourth boss, they are respectively inserted into the input shaft hole, the intermediate shaft hole and the output shaft hole when positioning the reduction box 1, and the outer peripheral surface of the second boss is matched with the inner side surface of the input shaft hole, the outer peripheral surface of the third boss is matched with the inner side surface of the intermediate shaft hole, and the outer peripheral surface of the fourth boss is matched with the inner side surface of the output shaft hole. The reduction box 1 can be positioned and the horizontal movement of the reduction box 1 can be restricted, thereby realizing the radial limitation of the rotor sub-assembly 5 installed on the reduction box 1. During the disassembly and assembly of the electric drive assembly, the radial runout and tilt of the rotor sub-assembly 5 can be effectively avoided.

[0165] The above are only specific application examples of the present invention and do not constitute any limitation to the protection scope of the present invention. Any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A disassembly and assembly device for an electric drive assembly, characterized in that: include: A support frame; the support frame is used to support the front end of the reduction box of the electric drive assembly to position the reduction box and make the rear end of the reduction box face upward; A fixing unit, the fixing unit being mounted on the support frame and being used to fix the positioned reduction gearbox on the support frame; A first motion unit, the first motion unit is used to clamp and fix the stator and motor housing subassembly of the electric drive assembly so that the front end of the stator and motor housing subassembly faces downward, the first motion unit is also used to drive the stator and motor housing subassembly to rotate around its central axis and move in a horizontal plane, and the first motion unit is also used to drive the stator and motor housing subassembly to press down and move up; A first guide shaft, one end of which is used to be inserted into the motor housing connection hole on the rear end face of the reduction gearbox and threadedly connected to the motor housing connection hole, and a plurality of the first guide shafts are respectively connected to different motor housing connection holes; the first guide shaft is used to slide and guide with the corresponding reduction 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 subassembly and the motor rear end cover. The second motion unit is also used to drive the motor rear end cover to be pressed down and moved up.

2. The disassembly and assembly device of the electric drive assembly according to claim 1, characterized in that: It 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 surface of the rear end cover of the motor, and a first center hole coaxially arranged with the rotor shaft hole on the rear end cover of the motor is opened in the sleeve assembly; The lower end of the second guide shaft is used for being detachably coaxially fixedly connected with the end of the rotor shaft of the rotor sub-assembly of the electric drive assembly away from the reduction box, and the second guide shaft is used for slidingly guiding with the rotor shaft hole and the first center hole; The output end of the driving mechanism is fixedly connected to the upper end of the sleeve assembly. The driving mechanism is used to drive the rear end cover of the motor to rotate around its central axis and move in a horizontal plane. The driving mechanism is also used to drive the rear end cover of the motor to be pressed down and moved up.

3. The disassembly and assembly device of the electric drive assembly according to claim 2, characterized in that: The sleeve assembly comprises a connecting flange and a sleeve, wherein the first center hole is the inner hole of the sleeve; a second center hole is formed on the connecting flange, the sleeve passes through the second center hole, and the sleeve is slidably guided and matched with the second center hole; The connecting flange is used to be bolted to the rear end surface of the rear end cover of the motor; 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 limit the sliding of the sleeve in the second center hole; The upper end of the sleeve is fixedly connected to the output end of the driving mechanism.

4. The disassembly and assembly device of the electric drive assembly according to claim 3, characterized in that: The disassembly and assembly device of 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 reduction box, the lower end surface of the wave spring positioning sleeve is used to fit with the bearing installed on the end of the rotor shaft away from the reduction box, and the outer circumferential surface of the wave spring positioning sleeve is used to match with the inner circumferential surface of the wave spring of the electric drive assembly; A first boss is provided on the lower end surface of the second guide shaft, and the first boss is used to be inserted into the inner hole of the wave spring positioning sleeve from the upper side, and the outer circumferential surface of the first boss matches the inner circumferential surface of the inner hole of the wave spring positioning sleeve; an external thread is provided on the lower end surface of the first boss, and the external thread is used to be threadedly connected with the internal thread on the end of the rotor shaft away from the reduction box; the shoulder of the first boss is used to abut against the upper end surface of the wave spring positioning sleeve.

5. The disassembly and assembly device of the electric drive assembly according to claim 1, characterized in that: The support frame comprises: 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; The upper end surface of the input shaft position support block is used to support the outer edge of the input shaft hole on the front end surface of the reduction box; The upper end surface of the intermediate shaft position support block is used to support the outer edge of the intermediate shaft hole on the front end surface of the reduction box; The upper end surface of the output shaft position support block is used to support the outer edge of the output shaft hole on the front end surface of the reduction box; A second boss is provided on the upper end surface of the input shaft position support block, a third boss is provided on the upper end surface of the intermediate shaft position support block, and a fourth boss is provided on the upper end surface of the output shaft position support block; The second boss, the third boss, and the fourth boss are used to penetrate the input shaft hole, the intermediate shaft hole, and the output shaft hole respectively when positioning the reduction box; The outer circumferential surface of the second boss matches with the inner side surface of the input shaft hole, the outer circumferential surface of the third boss matches with the inner side surface of the intermediate shaft hole, and the outer circumferential surface of the fourth boss matches with the inner side surface of the output shaft hole.

6. The disassembly and assembly device of the electric drive assembly according to claim 1, characterized in that: The fixing unit includes a plurality of locking mechanisms arranged one by one corresponding to the lifting ears on the side of the reduction box, and each of the locking mechanisms is fixedly mounted on the support frame; The locking mechanism is used to bolt the corresponding lifting lugs or press down the corresponding lifting lugs after the reduction box is positioned, so as to fix the positioned reduction box on the support frame.

7. A method for installing an electric drive assembly, characterized in that: The installation method is implemented by using the disassembly and assembly device of the electric drive assembly according to any one of claims 1 to 6, and includes: Using a support frame to support and position a reduction gearbox of an electric drive assembly; Fixing the positioned reduction gearbox on the support frame by using a fixing unit; The first guide shaft is threadedly connected to at least two motor housing connection holes on the rear end face of the reduction box, and the rotor sub-assembly of the electric drive assembly is installed at the input shaft hole on the rear end face of the reduction box; Using the first motion unit to clamp and fix the stator and motor housing subassembly of the electric drive assembly; The first motion unit is used to drive the stator and motor housing subassembly to rotate around its central axis and move in a horizontal plane, so that each reduction gearbox housing connection hole on the front end surface of the stator and motor housing subassembly is aligned with the corresponding motor housing connection hole on the rear end surface of the reduction gearbox; The stator and motor housing subassembly is driven downward by the first motion unit, so that each of the first guide shafts is respectively inserted into the corresponding reduction gearbox housing connection hole on the front end surface of the stator and motor housing subassembly, until the front end surface of the stator and motor housing subassembly is pressed downward to fit with the rear end surface of the reduction gearbox; After removing each of the first guide shafts, the connection between the stator and motor housing subassembly and the reduction box is completed; Installing the rear end cover of the motor of the electric drive assembly onto the second motion unit; The second motion unit is used to drive the rear end cover of the motor to rotate around its central axis and move in a horizontal plane, so as to complete the positioning between the stator and motor housing subassembly and the rear end cover of the motor; The second motion unit is used to drive the rear end cover of the motor to be pressed down, so as to complete the assembly between the rear end cover of the motor and the stator and motor housing subassembly.

8. The method for installing the drive assembly according to claim 7, characterized in that: After the rotor sub-assembly of the electric drive assembly is installed at the input shaft hole on the rear end face of the reduction box; the wave spring positioning sleeve is sleeved on the end of the rotor shaft of the rotor sub-assembly away from the reduction box, and the lower end face of the wave spring positioning sleeve is fitted with the bearing installed on the end of the rotor shaft away from the reduction box; the wave spring of the electric drive assembly is sleeved on the outer peripheral surface of the wave spring positioning sleeve; and 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 subassembly and the reduction gearbox, insert the first boss on the lower end surface of the second guide shaft from the upper side into the inner hole of the wave spring positioning sleeve and threadedly connect it to the end of the rotor shaft away from the reduction gearbox, and after the shoulder of the first boss is abutted against the upper end surface of the wave spring positioning sleeve, install the rear end cover of the motor of the electric drive assembly onto the second motion unit.

9. A method for disassembling an electric drive assembly, characterized in that: The disassembly method is implemented by using the disassembly and assembly device of the electric drive assembly according to any one of claims 1 to 6, wherein the disassembly method comprises: The support frame is used to support and position the reduction gearbox of the electric drive assembly, thereby completing the positioning of the electric drive assembly; Fixing the positioned electric drive assembly on 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 subassembly of the electric drive assembly; Complete the fixed connection between the second motion unit and the rear end cover of the motor; Using the second motion unit to drive the rear end cover of the motor to move upward, so as to complete the removal of the rear end cover of the motor; Remove the connecting bolts between the stator and motor housing subassembly and the reduction gearbox of the electric drive assembly; Insert a first guide shaft into each of at least two reduction gearbox housing connection holes of the stator and motor housing subassembly, and thread each of the first guide shafts into a corresponding motor housing connection hole on the rear end surface of the reduction gearbox; Using the first motion unit to clamp and fix the stator and motor housing subassembly; Using the first motion unit to drive the stator and motor housing sub-assembly to move upward, so as to complete the separation between the stator and motor housing sub-assembly and the rotor sub-assembly of the electric drive assembly; The rotor sub-assembly is removed from the input shaft hole on the rear end face of the reduction box to complete the disassembly of the electric drive assembly.

10. The method for disassembling a drive assembly according to claim 9, 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; inserting the lower end of the second guide shaft into the rotor shaft hole on the motor rear end cover and threading it with the end of the rotor shaft of the rotor sub-assembly away from the reduction box, and then completing 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: fixedly connecting the sleeve assembly of the second motion unit to the rear end surface of the rear end cover of the motor, and passing the upper end of the second guide shaft through the first center hole of the sleeve assembly; and then fixedly connecting the output end of the driving mechanism of the second motion unit to the upper end of the sleeve assembly.

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