Motor rotor retaining spring installation device and method

Abstract

The present invention discloses a motor rotor retaining spring installation device and method. The motor rotor retaining spring installation device includes: an assembly platform for placing a housing with a stator assembled; a positioning rod, the rod body of which is arranged along the axis of the stator, and the top end of which extends into the interior of the stator through a bearing mounting hole; a lower positioning mechanism for driving the positioning rod to move along the axis of the stator; a guide tool slidably arranged at the top end of the positioning rod, having a tapered outer surface, for expanding the retaining spring to the installation size and also for placing the rotor; a feeding mechanism for placing the rotor on the positioning portion; a pressing mechanism for pushing the rotor and the guide tool to slide along the positioning rod to achieve assembly of the stator and rotor, and also for embedding the retaining spring into the mounting groove on the bearing. By completing the installation of the retaining spring during the assembly process of the stator and rotor, the process is integrated and simplified, the production cycle is reduced, and efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile motors, and in particular to a device and method for installing a motor rotor retaining spring. Background Art

[0002] In motor production, the two processes of rotor retaining ring installation and stator-rotor assembly are usually carried out separately and independently, and manual installation of retaining rings is more common. It is also common for workers to use slings to place the rotor into the stator. This method has many production processes, long cycle time, and high labor costs. In addition, during the assembly process, due to the magnetic force between the stator and rotor, it is easy to cause parts to be bumped and damaged. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a motor rotor retaining spring installation device and method, which combines the retaining spring installation process with the stator and rotor assembly process into one, and is completed automatically by machinery, greatly saving process time and improving efficiency and product quality.

[0004] In order to solve the above technical problems, the present invention provides a motor rotor retaining spring installation device, comprising: an assembly platform for placing a casing assembled with a stator, wherein a retaining spring groove for placing a retaining spring is provided on the inner wall of the bearing mounting hole of the casing; a positioning rod, the rod body of which is arranged along the axis of the stator, and the top end extends into the interior of the stator through the bearing mounting hole; a lower positioning mechanism for driving the positioning rod to move along the axis of the stator; a guide tool slidably arranged on the top end of the positioning rod, comprising a cone and a positioning part, the cone having a conical outer surface for expanding the retaining spring to an installation size, the positioning part being used to place the rotor, and after placement: the outer surface of the bearing of the rotor is connected to the large end of the conical outer surface; a feeding mechanism for placing the rotor on the positioning part; a pressing mechanism for pushing the rotor and the guide tool to slide along the positioning rod to realize the assembly of the stator and the rotor, and also to embed the retaining spring into the installation groove on the bearing.

[0005] In the above-mentioned motor rotor retaining ring installation device, the rotor is guided to move by the guide tooling support and finally assembled with the stator. During the assembly process, the retaining ring placed in the retaining ring groove is continuously stretched through the tapered outer surface of the guide tooling, and slides to the outer surface of the bearing, and finally embedded in the installation groove on the bearing, thereby achieving both the assembly of the stator and the rotor and the installation of the retaining ring in one process action, realizing the integration and simplification of the process, reducing the production cycle and improving efficiency. In addition, the main assembly actions are all completed by the machine. According to the state parameters of the machine, such as the pressure-displacement curve of the pressing mechanism, the assembly result can be judged, thereby improving the automation and process quality of the assembly process.

[0006] Furthermore, the guide tooling includes a first cylinder and a second cylinder arranged coaxially, and a cone provided between the first cylinder and the second cylinder. The diameter of the first cylinder is larger than that of the second cylinder and is the same as the outer diameter of the bearing. The two ends of the outer side surface of the cone are respectively connected to the outer side surfaces of the first cylinder and the second cylinder. The outer side surface of the cone forms the cone portion, and a slot is opened on the top surface of the guide tooling to form the positioning portion.

[0007] Preferably, a through stepped hole is provided in the center of the guide tooling, including a first through hole and a second through hole, the aperture of the first through hole is larger than the diameter of the rotor components at the bottom of the bearing, and the first through hole is located at one end of the first column, the first through hole is used to place the bottom end of the rotating shaft of the stator, so that the bearing fits with the top surface of the first column; the second through hole is used to be slidably connected to the top end of the positioning rod.

[0008] Furthermore, an insertion shaft is coaxially provided at the top end of the positioning rod, and the diameter of the insertion shaft is smaller than the diameter of the positioning rod body, so that the top end of the positioning rod is in the shape of a stepped shaft for placing the guide tooling.

[0009] Preferably, a compression spring is provided on the outer side of the bottom end of the insertion shaft, and the compression spring is used to elastically support the guide fixture. The compression spring provides elastic buffering to prevent the guide fixture from directly colliding with the bottom surface of the insertion shaft and causing damage.

[0010] Furthermore, a protrusion is provided on the top end of the insertion shaft, and the protrusion is used to engage with the recess at the bottom end of the rotating shaft of the rotor.

[0011] Furthermore, the device also includes a moving mechanism, which is arranged on the top of the assembling platform and is used to transfer and transport the guiding tooling.

[0012] Preferably, the press-fitting mechanism includes a rod-shaped pressing head aligned with the top end of the rotor shaft. Multiple claws are provided on one side of the pressing head for clamping the guide fixture. Integrating the moving mechanism into the press-fitting mechanism simplifies the device and reduces equipment costs.

[0013] In order to solve the above technical problems, the present invention provides a motor rotor retaining spring installation method based on the above motor rotor retaining spring installation device, comprising the following steps:

[0014] Step 1: Place the retaining ring into the retaining ring slot of the housing, assemble the stator, place it on the assembly platform and position it;

[0015] Step 2: Use the lower positioning mechanism to drive the positioning rod into the stator;

[0016] Step 3: Place the guide tool on the top of the positioning rod;

[0017] Step 4: The loading mechanism moves and places the rotor on the guide fixture;

[0018] Step 5: The pressing mechanism presses down the rotor and the guide fixture, and the lower positioning mechanism drives the positioning rod to move downward synchronously, so that the bearing is installed in the bearing mounting hole.

[0019] In the above installation method, it is only necessary to manually place the retaining ring into the retaining ring groove, and the assembly of the stator and rotor, as well as the installation of the retaining ring, are all completed in the same process action, realizing the integration and simplification of the process and greatly improving efficiency. In addition, according to the parameter display of the machine, the assembly result can be judged, thereby improving the automation and quality of the assembly process.

[0020] Furthermore, after step 5, the method further includes:

[0021] Step 6: Remove the assembled stator and rotor, and remove the guide tooling from the positioning rod.

[0022] In summary, by adopting the above-mentioned motor rotor retaining spring installation device and method, the retaining spring can be installed during the assembly process of the stator and rotor, thereby integrating and simplifying the process, reducing the production cycle, improving efficiency, and enhancing the automation and process quality of the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached figure:

[0024] Figure 1 It is an overall structural diagram of the motor rotor retaining spring installation device of the present invention.

[0025] Figure 2 The present invention is a schematic structural diagram of the stator and rotor of the motor rotor retaining spring installation device when the stator and rotor are assembled.

[0026] Figure 3 for Figure 2 A partial view cut along the plane where the two stator axes are located.

[0027] Figure 4 It is a cross-sectional structural diagram of the guide tooling of the motor rotor retaining spring installation device of the present invention.

[0028] Figure 5 It is a structural diagram of the positioning rod of the motor rotor retaining spring installation device of the present invention.

[0029] Figure 6 It is a structural diagram of the pressure head of the motor rotor retaining spring installation device of the present invention.

[0030] Figure 7 It is a structural diagram of the press-fitting mechanism of the motor rotor retaining spring installation device of the present invention.

[0031] Figure 8It is a structural diagram of the lower positioning mechanism of the motor rotor retaining spring installation device of the present invention.

[0032] In the figure, 1. assembly platform; 2. positioning rod; 21. insertion shaft; 211. protrusion; 22. compression spring; 23. lower positioning mechanism; 231. second vertical movable module; 232. lifting plate; 233. mounting plate; 3. guiding tool; 31. first column; 32. second column; 33. cone; 34. first through hole; 35. second through hole; 36. annular groove; 4. feeding mechanism; 5. pressing mechanism; 51. pressing head; 52. claw; 53. bracket; 54. first vertical movable module; 6. stator; 7. rotor; 71. bearing; 72. mounting groove; 8. retaining ring; 9. housing; 91. bearing mounting hole; 92. retaining ring groove. DETAILED DESCRIPTION

[0033] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0034] Example 1

[0035] Figure 1-8 The present invention shows a motor rotor retaining spring installation device. Figure 1-3 As shown, the motor in the figure has two rotors 7 for driving and generating electricity. The two rotors 7 have the same retaining spring 8 for installation and assembly with the stator 6. The motor rotor retaining spring installation device includes: an assembly platform 1 for placing the housing 9 assembled with the stator 6, wherein a retaining spring groove 92 for placing the retaining spring 8 is provided on the inner wall of the bearing mounting hole 91 of the housing 9; a positioning rod 2, the rod body of which is arranged along the axis of the stator 6, and the top end extends into the interior of the stator 6 through the bearing mounting hole 91; a lower positioning mechanism 23 for driving the positioning rod 2 to move along the axis of the stator 6; a guide tool 3 slidably arranged on the top end of the positioning rod 2, including a cone and a positioning part, the cone having a conical outer side surface, for stretching the retaining spring 8 to the installation size, the positioning part being used to place the rotor 7, and after placement: the outer side surface of the bearing 71 of the rotor 7 is connected to the large end of the conical outer side surface; a feeding mechanism 4 for placing the rotor 7 on the positioning part; a pressing mechanism 5 for pushing the rotor 7 and the guide tool 3 to slide along the positioning rod 2, so as to realize the assembly of the stator 6 and the rotor 7, and also to embed the retaining spring 8 into the mounting groove 72 on the bearing 71.

[0036] During use, the assembly platform 1 is horizontally arranged, with the loading mechanism 4 located on one side of the assembly platform 1 and the pressing mechanism 5 located on the top of the assembly platform 1. First, the housing 9 with the stator 6 assembled is placed on the assembly platform 1, with the axis of the stator 6 vertical. The guide fixture 3 is then placed on the top of the positioning rod 2. The loading mechanism 4 is then used to place the rotor 7 on the guide fixture 3. Finally, the pressing mechanism 5 is activated, pushing the rotor 7 and the guide fixture 3 downward. The positioning rod 2 is then driven downward by the lower positioning mechanism 23. During this movement, the retaining spring 8 is gradually stretched to the installation size by the tapered outer surface of the cone. The retaining spring 8 then moves to the surface of the bearing 71 and continues to slide. The retaining spring 8 is finally embedded in the mounting groove 72 on the bearing 71 until the bearing 71 is installed in the bearing mounting hole 91, and the downward movement stops. This completes the assembly of the stator 6 and rotor 7, and the retaining spring 8 is also installed, achieving process integration and improving efficiency. Furthermore, the pressure-displacement curve of the pressing mechanism 5 can be used to determine the assembly result, improving the automation and process quality of the assembly process. The feeding mechanism 4 adopts a robot.

[0037] Since the bearing 71 and the bearing mounting hole 91 of the housing 9 can be an interference fit or a clearance fit, the clearance fit is generally that the inner hole size of the bearing mounting hole 91 is larger than the outer diameter of the bearing 71 by about 10um, and the interference fit is generally that the inner hole size of the bearing mounting hole 91 is smaller than the outer diameter of the bearing by about 3-5um. The pressing force required for these two types of fits is relatively small. The pressing mechanism 5 of the present invention can meet the pressing force requirement by pushing the rotor 7 to press the bearing 71. Of course, a clearance fit can also be used. As long as the flat rotation can be guaranteed, almost no pressing force is required.

[0038] like Figure 4 As shown, the guide tooling 3 includes a first column 31 and a second column 32 arranged coaxially, and a cone 33 provided between the first column 31 and the second column 32. The diameter of the first column 31 is larger than that of the second column 32 and is the same as the outer diameter of the bearing 71. The two ends of the outer side surface of the cone 33 are respectively connected to the outer side surfaces of the first column 31 and the second column 32. The outer side surface of the cone 33 forms a cone portion, and a slot is opened on the top surface of the guide tooling 3 to form a positioning portion.

[0039] The guide tooling 3 is arranged vertically, with the first column 31 at the top. After the rotor 7 is placed, the outer side surface of the first column 31 connects the large end of the tapered outer side surface and the side surface of the bearing 71. During the sliding of the rotor 7, relatively speaking: the retaining spring 8 moves along the tapered outer side surface toward the large end, opens to the installation size, and then slides onto the first column 31, maintaining the installation size, and continues to slide to shrink and embed into the retaining spring groove 92.

[0040] Optionally, a stepped hole is provided through the center of the guide fixture 3, including a first through hole 34 and a second through hole 35. The diameter of the first through hole 34 is larger than the diameter of the components of the rotor 7 at the bottom of the bearing 71. The first through hole 34 is located at one end of the first column 31 and is used to accommodate the bottom end of the rotating shaft of the stator 6, so that the bearing 71 is aligned with the top surface of the first column 31. The second through hole 35 is used for sliding connection with the top end of the positioning rod 2. Optionally, the diameter of the second through hole 35 is larger than the outer diameter of the bottommost rotating component of the rotor 7.

[0041] The bottom of the bearing 71 of the rotor 7 is typically equipped with components such as gears fixed to the rotating shaft. These components are accommodated in the first through-hole 34 and the second through-hole 35. The top surface of the first column 31 supports the bottom end surface of the bearing 71, allowing the rotor 7 to be stably placed on the guide fixture 3 while maintaining a vertical axis. The inner diameters of the first through-hole 34 and the second through-hole 35 must be appropriately sized to allow for easy insertion of components and preliminary alignment of the rotor 7 for easy assembly.

[0042] Optionally, the device further comprises a moving mechanism, which is provided on the top of the assembly platform 1 and is used to transfer and transport the guide tool 3. An annular groove 36 is provided on the inner wall of the first through hole 34, and the annular groove 36 is used for the moving mechanism to clamp the guide tool 3.

[0043] like Figure 5 As shown, the top end of the positioning rod 2 is coaxially provided with an insertion shaft 21. The diameter of the insertion shaft 21 is smaller than the diameter of the rod body of the positioning rod 2, making the top end of the positioning rod 2 a stepped shaft shape for placing the guide tool 3. The positioning rod 2 is arranged vertically, and the insertion shaft 21 of the top stepped shaft is adapted to the second through hole 35 to support the guide tool 3.

[0044] Optionally, a compression spring 22 is provided on the outer side of the bottom end of the insertion shaft 21. The compression spring 22 is used to elastically support the guide fixture 3. After the guide fixture 3 and the rotor 7 are placed, the compression spring 22 can provide a certain supporting force, which can provide a certain buffer when the press-fitting mechanism 5 is pressed downward, thereby reducing the loss of parts and equipment caused by the inconsistent driving speed of the lower positioning mechanism 23 and the pressing speed of the press-fitting mechanism 5.

[0045] Optionally, a protrusion 211 is provided at the top of the insertion shaft 21, and the protrusion 211 is used to engage with the recess at the bottom end of the rotating shaft of the rotor 7. When the guide device is placed, the protrusion 211 is embedded in the bottom end of the rotating shaft to position the rotor 7, keep the axis of the rotor 7 vertical, reduce the influence of magnetic force, and ensure accurate and efficient assembly.

[0046] In order to simplify the mechanism, the moving mechanism is integrated into the press-fitting mechanism. The press-fitting mechanism 5 includes a rod-shaped pressing head 51, which is aligned with the top of the rotating shaft of the rotor 7. A plurality of claws 52 are provided on the side surface of the pressing head 51. The claws 52 are used to clamp and guide the tool 3. When the pressing head 51 is pressed, it contacts and applies force with the top of the rotating shaft of the rotor 7. In addition, a protrusion structure can be provided on the end surface of the pressing head 51, which is embedded in the oil channel hole of the rotating shaft to perform centering positioning. Figure 6 As shown, the claws 52 can be extended and retracted along the radial direction of the pressure head 51. When clamping the guide tool 3, the pressure head 51 extends into the first through hole 34, and the claws 52 open to the surroundings and are clamped in the annular groove 36 to achieve smooth transportation. The pressure head 51 can be pushed by a cylinder.

[0047] Optional, such as Figure 7 As shown, the pressing mechanism 5 also includes a bracket 53 and a first vertical movable module 54. The bracket 53 is a frame structure, which supports the pressing head 51 vertically and centrally above the axis of the stator 6. The first vertical movable module 54 can adopt a motor screw structure, a cylinder push rod or a hydraulic cylinder push rod structure to move the pressing head 51 vertically to achieve pressing.

[0048] Optional, such as Figure 8 As shown, the lower positioning mechanism 23 includes two second vertical movable modules 231 arranged opposite to each other, and the output ends of the second vertical movable modules 231 are respectively provided with a lifting plate 232. The bottom end of the positioning rod 2 is fixed on the lifting plate 232 and is driven up and down by the second vertical movable module 231. A mounting plate 233 is also provided at the bottom of the lifting plate 232. Guide columns are set on the mounting plate 233 and the assembly platform 1, and both ends of the mounting plate 233 are fixedly connected to the support frame of the equipment.

[0049] The present invention provides a method for installing a motor rotor retaining spring based on the above-mentioned device, comprising the following steps:

[0050] Step S10: Place the retaining spring 8 in the retaining spring slot 92 of the housing 9, and assemble the stator 6 and place it on the assembly platform 1. The assembly platform 1 is usually placed horizontally to make the axis of the stator 6 vertical for easy assembly.

[0051] Step S20: Use the lower positioning mechanism 23 to drive the positioning rod 2 into the stator 6. The circlip 8 can be placed manually. The circlip 8 is naturally small and easy to place. Then, use the lower positioning mechanism 23 to extend the positioning rod 2 into the stator 6 that has just been placed.

[0052] Step S30: Place the guide fixture 3 on the top of the positioning rod 2. Insert the insertion shaft 21 into the second through-hole 35 to complete the placement. By designing the top height of the positioning rod 2, the guide fixture 3 can be positioned at an appropriate height. For example, the tapered outer surface of the guide fixture 3 can partially pass through the inner hole of the retaining ring 8 to facilitate subsequent press-fitting.

[0053] Step S40: Place the rotor 7 on the guide fixture 3. Start the loading mechanism 4 to place the bottom end of the rotor 7 into the first through hole 34 or the second through hole 35, so that the bottom surface of the bearing 71 of the rotor 7 is aligned with the top surface of the first column 31.

[0054] Step S50: Rotor 7 and guide fixture 3 are pressed downward, and lower positioning mechanism 23 drives positioning rod 2 to move downward synchronously, installing bearing 71 into bearing mounting hole 91. Pressing mechanism 5 is activated, pushing rotor 7 downward. Circlip 8 is gradually stretched to the installation size by the tapered outer surface of the cone portion and engages with mounting groove 72 on bearing 71. Finally, bearing 71 is installed in bearing mounting hole 91, completing the assembly of stator 6 and rotor 7.

[0055] Step S60: remove the assembled stator 6 and rotor 7 and proceed to the next step; and remove the guide tool 3 from the positioning rod 2 for the next assembly.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art may still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the scope of protection of the pending claims of the invention.

Claims

1. A motor rotor retaining spring installation device, characterized in that: include: An assembly platform (1) is used to place a housing (9) on which a stator (6) is assembled, wherein a retaining spring groove (92) for placing a retaining spring (8) is provided on the inner wall of a bearing mounting hole (91) of the housing (9); A positioning rod (2), the rod body of which is arranged along the axis of the stator (6), and the top end of which extends into the interior of the stator (6) through the bearing mounting hole (91); A lower positioning mechanism (23) is used to drive the positioning rod (2) to move along the axis of the stator (6); A guide tool (3) is provided at the top end of the positioning rod (2), comprising a cone portion and a positioning portion, wherein the cone portion has a cone-shaped outer side surface for expanding the clamping spring (8) to an installation size, and the positioning portion is used to place the rotor (7), and after placement: the outer side surface of the bearing (71) of the rotor (7) is connected to the large end of the cone-shaped outer side surface; A loading mechanism (4) for placing the rotor (7) on the positioning portion; A press-fitting mechanism (5) is used to push the rotor (7) and the guide fixture (3) to slide along the positioning rod (2), thereby achieving the assembly of the stator (6) and the rotor (7), and also allowing the retaining ring (8) to be embedded in the mounting groove (72) on the bearing (71); A moving mechanism is provided on the top of the assembly platform (1) and is used for transferring and transporting the guide tooling (3).

2. The motor rotor retaining spring installation device according to claim 1, characterized in that: An insertion shaft (21) is coaxially arranged at the top end of the positioning rod (2), and the diameter of the insertion shaft (21) is smaller than the diameter of the rod body of the positioning rod (2), so that the top end of the positioning rod (2) is in the shape of a stepped shaft and is used to place the guide tool (3).

3. The motor rotor retaining spring installation device according to claim 2, characterized in that: A compression spring (22) is provided on the outer side of the bottom end of the insertion shaft (21), and the compression spring (22) is used for elastically supporting the guide fixture (3).

4. The motor rotor retaining spring installation device according to claim 2, characterized in that: The top end of the insertion shaft (21) is provided with a protrusion (211), and the protrusion (211) is used to engage with the recess at the bottom end of the rotating shaft of the rotor (7).

5. The motor rotor retaining spring installation device according to claim 1, characterized in that: The guide tooling (3) comprises a first column (31) and a second column (32) arranged coaxially, and a cone (33) provided between the first column (31) and the second column (32), wherein the diameter of the first column (31) is larger than that of the second column (32) and is the same as the outer diameter of the bearing (71), and the outer ends of the outer side surface of the cone (33) are respectively connected to the outer side surfaces of the first column (31) and the second column (32).

6. The motor rotor retaining spring installation device according to claim 5, characterized in that: A through stepped hole is provided at the center of the guide fixture (3), including a first through hole (34) and a second through hole (35). The aperture of the first through hole (34) is larger than the diameter of each component of the rotor (7) at the bottom of the bearing (71), and the first through hole (34) is located at one end of the first column (31). The first through hole (34) is used to place the bottom end of the rotating shaft of the stator (6) so that the bearing (71) fits with the top surface of the first column (31); the second through hole (35) is used to be slidably connected with the top end of the positioning rod (2).

7. The motor rotor retaining spring installation device according to claim 1, characterized in that: The pressing mechanism (5) includes a rod-shaped pressing head (51), the pressing head (51) is aligned with the top end of the rotating shaft of the rotor (7), and a plurality of claws (52) are provided on a side surface of the pressing head (51), and the claws (52) are used to clamp the guide tool (3).

8. A method for installing a motor rotor circlip based on the motor rotor circlip installation device according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: Place the retaining spring (8) into the retaining spring slot (92) of the housing (9), assemble the stator (6), and place it on the assembly platform (1); Step 2: Using the lower positioning mechanism (23) to drive the positioning rod (2) into the stator (6); Step 3: Place the guide tool (3) on the top of the positioning rod (2); Step 4: Place the rotor (7) on the guide fixture (3); Step 5: Press down the rotor (7) and the guide fixture (3), and the lower positioning mechanism (23) drives the positioning rod (2) to move downward synchronously, so that the bearing (71) is installed in the bearing mounting hole (91); Step 6: Remove the assembled stator (6) and rotor (7), and remove the guide fixture (3) from the positioning rod (2).

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