Auxiliary device for field disassembly and assembly of rotor of permanent magnet synchronous traction machine of elevator

Abstract

The utility model provides an auxiliary device for on-site disassembly and assembly of a rotor of an elevator permanent magnet synchronous traction machine, and the auxiliary device comprises a supporting track which is used for being installed on a machine placing beam below the elevator permanent magnet synchronous traction machine when the rotor of the elevator permanent magnet synchronous traction machine is disassembled and assembled on site; the sliding frame is jointed with the supporting rail so as to be capable of sliding on the supporting rail; the bracket is arranged on the sliding frame and is used for supporting the rotor; the support is detachably connected with a rotor of the elevator permanent magnet synchronous traction machine through the fixing component; and the pushing and ejecting mechanism is arranged on the bracket and is used for pushing and ejecting the bracket relative to a machine base of the elevator permanent magnet synchronous traction machine so as to move out the rotor.

Description

Technical Field

[0001] This disclosure relates to the field of elevator maintenance technology, and more specifically, to an auxiliary device for on-site disassembly and assembly of elevator permanent magnet synchronous traction machine rotors. Background Technology

[0002] With the development of permanent magnet motors, elevators now primarily use permanent magnet synchronous traction machines, with gear traction machines accounting for a very small percentage. The permanent magnet synchronous traction machine is a crucial component of an elevator, providing power and braking force for its operation. Due to its frequent operation and long-term use, it is prone to various internal faults such as short circuits in the traction machine coils, permanent demagnetization of the magnets, and bearing damage. Inspecting for internal faults or replacing components requires disassembling the rotor.

[0003] The rotor is mounted on the bearings of the motor base, which fits tightly together. Disassembly requires a lot of force. In addition, the inner ring of the rotor is equipped with magnets, and the gap between the inner ring of the rotor and the stator is generally 0.8-1.5mm. The gap between the outer ring of the rotor and the motor base is generally 1-2mm. During the removal of the rotor, it is easy for the rotor to collide with the motor base and the stator. In particular, it can damage the magnets or the coils on the stator, resulting in damage or scrap of the traction machine and causing losses.

[0004] Currently, the disassembly and installation of permanent magnet synchronous traction machine rotors used in elevators typically involves removing the entire machine from the support beam and transporting it back to the factory for rotor disassembly and installation. This method results in high costs, long lead times, and disruption to the user experience. Utility Model Content

[0005] This disclosure provides an auxiliary device for on-site disassembly and assembly of elevator permanent magnet synchronous traction machine rotors. It can efficiently disassemble and assemble elevator permanent magnet synchronous traction machine rotors on-site while ensuring the safety and quality of disassembly and assembly. It eliminates the need to transport the entire traction machine back to the factory, avoiding the disadvantages of transporting the traction machine back to the factory for disassembly and assembly, and also overcomes the defect of damage to the traction machine caused by on-site disassembly and assembly without professional auxiliary tools.

[0006] This disclosure provides an auxiliary device for on-site disassembly and assembly of an elevator permanent magnet synchronous traction machine rotor, comprising:

[0007] Support rails are used to install the rotor of the elevator permanent magnet synchronous traction machine onto the machine support beam below the elevator permanent magnet synchronous traction machine during on-site disassembly and assembly.

[0008] A sliding frame that engages with the support rail to be able to slide on the support rail;

[0009] A bracket, mounted on the sliding frame, is used to support the rotor;

[0010] A fixing component that detachably connects the bracket to the rotor of the elevator permanent magnet synchronous traction machine; and

[0011] A pushing mechanism, which is mounted on the bracket, is used to push the bracket relative to the base of the elevator permanent magnet synchronous traction machine when the rotor is disassembled, so as to drive the rotor to move out.

[0012] In some embodiments, the support track includes two slide rails and a connector, the connector being connected between the two parallel slide rails to form an H-shaped structure.

[0013] In some embodiments, one end of the slide rail has a first fixing slotted hole. Furthermore, the device further includes: a pressure plate disposed above the first fixing slotted hole of the slide rail and having a first through hole; and a bolt and nut assembly comprising a bolt and a nut, the bolt passing through the first through hole and the first fixing slotted hole and engaging with the nut to clamp a portion of the support beam between the pressure plate and the slide rail, thereby mounting the support rail onto the support beam.

[0014] In some embodiments, the sliding frame includes:

[0015] The carriage is a frame consisting of a first crossbeam, a second crossbeam, a first longitudinal beam connecting one end of the first crossbeam and the second crossbeam, and a second longitudinal beam connecting the other end of the first crossbeam and the second crossbeam.

[0016] At least two sliders are connected to two opposite edges of the frame, and the sliders have grooves for engaging with the slide rail to allow the sliding frame to slide on the slide rail.

[0017] In some embodiments, the at least two sliders include a first slider and a second slider respectively disposed at both ends of the first crossbeam, and a third slider and a fourth slider respectively disposed at both ends of the second crossbeam.

[0018] In some embodiments, the support includes:

[0019] A vertical support member having: two push-up waist-shaped holes for a portion of the push-up mechanism to pass through; and two rotor connecting waist-shaped holes located between the push-up waist-shaped holes for the fixing component to pass through.

[0020] A horizontal support member is connected to the lower end of the vertical support member and is orthogonal to the vertical support member;

[0021] A diagonal brace, which connects the vertical support and the horizontal support and is inclined relative to both.

[0022] In some embodiments, the auxiliary device includes two of the supports.

[0023] In some embodiments, the horizontal support has two spaced-apart second through holes, and the first and second crossbeams of the carriage are respectively provided with second fixing waist-shaped holes. The bracket and the carriage are fixed by bolts passing through the second through holes and the second fixing waist-shaped holes.

[0024] In some embodiments, the pushing mechanism includes:

[0025] A push nut that clamps the push oblong hole;

[0026] A push bolt passes through the push nut and the push slotted hole to contact the base, and is configured to apply a thrust to the base by turning the push bolt during rotor removal, so as to remove the rotor by a reaction force corresponding to the thrust.

[0027] The embodiments disclosed herein can achieve the following excellent technical effects:

[0028] Compared to sending the elevator permanent magnet synchronous traction machine back to the manufacturer for repair, the utility model disclosed herein can disassemble, inspect, and repair the traction machine rotor on-site, which is faster, cheaper, and has less impact on elevator use.

[0029] The present invention provides a convenient and quick way to disassemble and assemble the permanent magnet synchronous traction machine rotor of an elevator. By moving the rotor with a slide rail, the safety of the disassembly and assembly process is ensured, and the rotor will not collide with the machine base or stator due to rotor swing, thus avoiding damage caused by the disassembly and assembly process.

[0030] The utility model disclosed herein is applicable to the disassembly and assembly of rotors for various models of permanent magnet synchronous traction machines.

[0031] Various aspects, features, advantages, etc. of the embodiments disclosed herein will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0032] Figure 1 This is a schematic diagram showing the auxiliary device for on-site disassembly and assembly of the elevator permanent magnet synchronous traction machine rotor in the installation state according to an exemplary embodiment of this disclosure.

[0033] Figure 2 This is a schematic diagram showing the support rail of the auxiliary device for on-site disassembly and assembly of the permanent magnet synchronous traction machine rotor of the elevator according to an embodiment of the present disclosure.

[0034] Figure 3 This is a schematic diagram showing the sliding frame of the auxiliary device for on-site disassembly and assembly of the permanent magnet synchronous traction machine rotor of the elevator according to an embodiment of the present disclosure.

[0035] Figure 4This is a schematic diagram of the bracket for the auxiliary device for on-site disassembly and assembly of the permanent magnet synchronous traction machine rotor of the elevator according to the present invention.

[0036] Figures 5 to 8 This is a schematic diagram illustrating the on-site disassembly process of the permanent magnet synchronous traction machine rotor of an elevator according to an exemplary embodiment of this disclosure. Detailed Implementation

[0037] The exemplary embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that embodiments of this disclosure may take many forms and are not limited to the specific examples described herein or shown in the accompanying drawings.

[0038] The descriptions of element positions in this document (such as "top", "bottom", "above", "below", "left", "right", etc.) are used only to indicate the relative orientation of the elements in the accompanying drawings. In other embodiments, the orientation of the elements may differ, and these variations are also included within the scope of this disclosure.

[0039] Terms such as “substantially,” “about,” and “roughly” are used herein as descriptive terms rather than as limitations on precision. These terms are intended to cover a reasonable range of error for measurements or calculations that can be recognized by a person skilled in the art.

[0040] The terms “comprising,” “including,” “having,” and “having” are used herein to indicate the presence of certain features, steps, operations, elements, and / or components, but do not exclude the presence or addition of other features, steps, operations, elements, components, or combinations thereof.

[0041] Unless explicitly stated in the context, terms such as "first," "second," and similar expressions do not indicate any priority or order, but are used only to distinguish different objects in the description.

[0042] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0043] Figure 1 An auxiliary device for on-site disassembly and assembly of an elevator permanent magnet synchronous traction machine rotor, according to an exemplary embodiment of this disclosure, is shown. Figure 1 In this configuration, the auxiliary device 100 and the elevator permanent magnet synchronous traction machine 200 are in the installation state. It should be understood that the utility model disclosed herein is applicable to various models of permanent magnet synchronous traction machines. Figure 1 As shown, the auxiliary device 100 includes, but is not limited to: a support rail 110, a sliding frame 120, a bracket 130, a fixing component 140, and a pushing mechanism 150.

[0044] In this embodiment, the support rail 110 is used to install the rotor 202 of the elevator permanent magnet synchronous traction machine 200 onto the machine support beam 300 below the elevator permanent magnet synchronous traction machine 200 during on-site disassembly and assembly. A sliding frame 120 engages with the support rail 110 to allow sliding on the support rail 110. A bracket 130 is mounted on the sliding frame 120 for connecting and supporting the rotor 202. A fixing component 140 (e.g., a fixing bolt) detachably connects the bracket 130 to the rotor 202 of the elevator permanent magnet synchronous traction machine 200. A pushing mechanism 150 is disposed on the bracket 130 for pushing the bracket 130 relative to the base 201 of the elevator permanent magnet synchronous traction machine 200 during rotor 202 disassembly, thereby moving the rotor 202 out. Specifically, the push mechanism 150 causes the support 130 and the sliding frame 120 to translate along the support track 110, thereby enabling the rotor 202 to be removed while maintaining the gap between the magnet and the coil.

[0045] like Figure 2 As shown, the support rail 110 includes two slide rails 111 and a connector 112, the connector 112 connecting the two parallel slide rails 111 to form an H-shaped structure. Each slide rail 111 has a first fixing oblong hole 113 at one end. Furthermore, the auxiliary device 100 also includes a pressure plate 114 and a bolt and nut pair 115 for mounting the support rail 110 onto the machine beam 300 (e.g., ...). Figure 1 and Figure 5 (As shown). Specifically, the pressure plate 114 is disposed above the first fixing oblong hole 113 of the slide rail 111 and has a first through hole (not shown). The bolt and nut assembly 115 includes a bolt and a nut, the bolt passing through the first through hole and the first fixing oblong hole 113 and engaging with the nut to clamp a portion of the machine support beam 300 between the pressure plate 114 and the slide rail 111, thereby mounting the support rail 110 on the machine support beam 300, as shown. Figure 5 As shown. In this embodiment, as Figure 2 and Figure 5 As shown, the slide rail 111 can be fixed to the machine beam 300 using four pressure plates 114 and four sets of bolt and nut pairs 115 through the first fixing slotted hole 113. Using the fixing slotted hole makes it easier to adjust the fixing position to accommodate different machine beams.

[0046] In some embodiments, the support rail includes an H-shaped slide rail composed of three stainless steel angle bars, that is, both the slide rail 111 and the connector 112 are made of stainless steel angle bars.

[0047] like Figure 3As shown, the sliding frame 120 includes a carriage, which is a frame composed of a first crossbeam 121, a second crossbeam 122, a first longitudinal beam 123, and a second longitudinal beam 124. The first longitudinal beam 123 connects one end of the first crossbeam 121 and the second crossbeam 122, and the second longitudinal beam 124 connects the other end of the first crossbeam 121 and the second crossbeam 122. The sliding frame 120 also includes four sliders 127, namely a first slider and a second slider respectively disposed at both ends of the first crossbeam 121, and a third slider and a fourth slider respectively disposed at both ends of the second crossbeam 122. Each slider 127 has a groove 126 for cooperating with the slide rail 111 to allow the sliding frame 120 to slide on the slide rail 111 (e.g., ...). Figure 1 and Figure 6 (As shown). Although Figure 3 Four sliders are shown, but it should be understood that sliders can be symmetrically arranged along two opposite edges of the frame, for example, the sliders can be arranged along the first longitudinal beam 123 and the second longitudinal beam 124. Optionally, the first longitudinal beam 123 and the second longitudinal beam 124 themselves have grooves that mate with the slide rails 111. In some embodiments, multiple sliders can be arranged along two opposite edges of the frame, and the sliders on both sides do not necessarily have to be paired opposite each other, as long as the slide frame 120 can be balanced and stably held on the two parallel slide rails 111 and can move freely along the slide rails.

[0048] In some embodiments, the slide is a U-shaped slide made of four stainless steel angle bars, with a slider connected to the end of the slide. The slider has a groove in the middle for sliding on the support rail 110. The contact surface between the groove 126 and the rail 111 is smooth and flat to prevent jamming and vibration during relative sliding, thereby ensuring that the rotor does not collide with the machine base or stator during movement.

[0049] like Figure 4 As shown, the bracket 130 includes a vertical support 131, a horizontal support 132, and a diagonal brace 133. The horizontal support 132 is connected to the lower end of the vertical support 131 and is orthogonal to it. The diagonal brace 133 connects the vertical support 131 and the horizontal support 132 and is inclined relative to them, thus forming a stable triangular support structure. The vertical support 131 has two push-up oblong holes 135 through which a portion of the push-up mechanism 150 passes, and two rotor connection oblong holes 134 located between the push-up oblong holes 135. The rotor connection oblong holes 134 allow the fixing member 140 to pass through for connection with the rotor 202 (e.g., ...). Figure 1 and Figure 7(As shown). In this embodiment, the auxiliary device 100 includes two supports 130. In an optional embodiment, the auxiliary device 100 may have one or more supports 130.

[0050] like Figure 3 As shown, the first crossbeam 121 and the second crossbeam 122 of the carriage are respectively provided with second fixing waist-shaped holes 125. Figure 4 As shown, the horizontal support 132 has two spaced-apart second through holes (not shown), in which bolt and nut pairs 136 are provided. Figure 7 As shown, the bracket 130 and the sliding frame 120 are fixed by a bolt and nut pair 136 passing through the second through hole (not shown) and the second fixing waist-shaped hole 125. The second fixing waist-shaped hole 125 can be used to adjust the spacing between the two brackets 130 so that the brackets 130 are aligned with the connection part of the rotor 202.

[0051] like Figure 4 As shown, a pushing mechanism 150 is provided on the vertical support member 131. This pushing mechanism 150 includes a pushing nut 151 and a pushing bolt 152. The pushing nut 151 is an irregularly shaped nut, a snap-fit ​​nut, which is snapped onto the vertical support member 131 and clamps the pushing oblong hole 135. Figure 4 As shown, although the upper push nut is shown, the lower push nut is the same. The push nut includes a side portion (or base) 401, from which two extension portions 402 extend in a direction perpendicular to the side portion (the one shown on the outside of the paper, the other on the inside of the paper). These two extension portions 402 form a clamping portion, and the clamping portion (extension 402) has a screw hole. For example... Figure 4 As shown, the push-up waist-shaped hole 135 is located between the two extensions 402 of the push-up nut 151, and the push-up bolt 152 can pass through the threaded hole and engage with it. Figure 7 As shown, the push bolt 152 passes through the push nut and the push slotted hole to contact the base 201. When disassembling the rotor 202, by turning the push bolt 152, a pushing force is applied to the base 201 at its end, so that the rotor 202 is moved from the base 201 by a reaction force corresponding to the pushing force (e.g., ...). Figure 8 (As shown).

[0052] In an exemplary implementation, such as Figures 1 to 8As shown, the auxiliary device 100 includes two supports 130, four fixing components (e.g., bolts) 140, four push nuts 151, four push bolts 152, four sets of bolt and nut pairs 136, and four sets of bolt and nut pairs 115. The support 130 is a triangular support frame composed of stainless steel vertical angle steel (vertical support 131), horizontal angle steel (horizontal support 132), and diagonal bracing (diagonal bracing 133). The lower horizontal angle steel has two round holes (second through holes) corresponding to the fixing oblong holes on the sliding frame 120. The support 130 is fixed to the sliding frame 120 using bolt and nut pairs 136. The vertical angle steel of the support 130 has four oblong holes. The rotor 202 can be fixed to the support 130 using fixing bolts (i.e., fixing components 140) through the two middle oblong holes (i.e., rotor connection oblong holes 134). These oblong holes can accommodate rotors of different sizes. The push bolt 152 passes through two oblong holes (i.e., push oblong holes 135) and the push nut 151, and presses against the traction machine base 201. The oblong holes can adjust the position of the push bolt 152 against the base 201 to accommodate different sizes of main units. The push bolt 152 applies a pushing force to the base 201, and the force is reacted to the rotor 202 through the push nut 151 and the bracket 130, thereby pushing the rotor 202 away from the base 201.

[0053] In an exemplary embodiment, disassembling the rotor of an elevator permanent magnet synchronous traction machine on-site using the auxiliary device 100 includes:

[0054] (1) Install the support rail 110 onto the machine support beam 300 below the elevator permanent magnet synchronous traction machine 200. For example... Figure 5 As shown, specifically, the slide rail 111 is fixed to the machine support beam 300 by the pressure plate 114 and the bolt and nut pair 115. The slide rail 111 is perpendicular to the machine support beam 300, so that the central axis of the support rail 110 remains parallel to the central axis of the rotor 202. If the central axis of the rotor 202 is not originally perpendicular to the machine support beam 300, the relative position of the support rail 110 and the machine support beam 300 can be adjusted, for example, by suspending a plumb line at the center point before and after the main machine rotation shaft, so that the central axis of the support rail 110 remains parallel to the central axis of the rotor.

[0055] (2) Connect the sliding frame 120 to the support rail 110. For example... Figure 6 As shown, by aligning the slide groove 126 of the sliding frame 120 with the slide rail 111, the sliding frame 120 is moved relative to the slide rail 111, thereby sliding the slide rail 111 into the slide groove 126. The contact surfaces of the slide groove 126 and the slide rail 111 are smooth and flat, so that the two will not get stuck or shake during relative sliding.

[0056] (3) Install the bracket 130 onto the sliding frame 120.

[0057] (4) Connect the bracket 130 to the rotor 202 of the elevator permanent magnet synchronous traction machine.

[0058] like Figure 7 As shown, two supports 130 are placed on the sliding frame 120. The sliding frame 120 is moved so that the supports 130 are close to the rotor 202. The rotor 202 is rotated to select the fixed position of the supports 130, the rotor 202, and the sliding frame 120. Then, using the two rotor connecting slotted holes 134 on the vertical support of the support 130 and the screw holes on the rotor 202 that were originally used to fix the traction sheave, the rotor 202 is fixedly connected to the support 130 with a fixing component 140 (e.g., fixing bolts). At the same time, the support 130 is fixed to the sliding frame 120 with a bolt and nut pair 136 by using the second through hole on the horizontal support of the support 130 and the second fixing slotted hole 125 on the sliding frame 120.

[0059] (5) Select the push position on the base 201, and use the push bolt 152 to fix the push nut 151 into the upper and lower push slots 135 of the vertical support of the bracket 130, such as Figure 7 As shown. Then, the pushing mechanism on the operating bracket 130 pushes the bracket 130 relative to the base 201 of the elevator permanent magnet synchronous traction machine to move the rotor 202 out. Specifically, by turning the pushing bolt 152, the end of the pushing bolt 152 applies a pushing force to the base 201. For example, the pushing bolts 152 are turned one by one to apply a pushing force evenly to the base 201. The base 201 generates a reaction force on the pushing bolts 152, which is applied to the bracket 130 and the sliding frame 120 fixed thereto through the pushing bolts 152 and the pushing nut 151, causing the sliding frame 120 and the bracket 130 to translate along the slide rail 111, thereby driving the rotor 202 to translate, thus slowly moving the rotor 202 out of the base 201 (e.g. Figure 8 (As shown). Because the contact surfaces of the slide groove 126 and the slide rail 111 in the auxiliary device 100 are smooth and flat, they will not get stuck or shake during relative sliding. As a result, the rotor 202 can be smoothly moved out of the machine base 201 without colliding with the machine base or stator, thus completing the disassembly of the rotor.

[0060] In an exemplary embodiment, after inspection or maintenance, while maintaining the relative positions of the bracket 130 and rotor 202 with the base 201, the rotor of the elevator permanent magnet synchronous traction machine is installed on-site using the auxiliary device 100. Specifically, this includes pushing the bracket to install the rotor into the base. Further, the installation operation also includes: separating the rotor from the bracket; disassembling the bracket and sliding frame from the support rail; and removing the support rail from the machine support beam.

[0061] According to an exemplary embodiment, when installing the rotor, since the fixed position of the bracket remains unchanged, the rotor can be installed into the machine base by pushing the bracket in the reverse direction. In some embodiments, liquid nitrogen can be used to cool the bearings during this process before moving the rotor in, improving installation accuracy and ensuring installation quality.

[0062] The above embodiments describe the operation of this disclosure in a certain order, but the operation of this disclosure is not limited thereto. For example, in some embodiments, the sliding frame can be installed on the support rail first, and then the support rail can be installed on the machine beam; or, the bracket can be installed on the sliding frame first, and then the sliding frame and the bracket can be installed together on the support rail.

[0063] Those skilled in the art should understand that the above disclosure is merely illustrative of embodiments of this disclosure, and the scope of patent protection claimed in this application is not limited thereto. Various modifications, alterations, substitutions, and other changes can be made to the embodiments disclosed herein without departing from the spirit and essence of this disclosure, and such changes are within the scope covered by the claims of this application.

Claims

1. An auxiliary device for on-site disassembly and assembly of an elevator permanent magnet synchronous traction machine rotor, characterized in that, include: Support rails are used to install the rotor of the elevator permanent magnet synchronous traction machine onto the machine support beam below the elevator permanent magnet synchronous traction machine during on-site disassembly and assembly. A sliding frame that engages with the support rail to be able to slide on the support rail; A bracket, mounted on the sliding frame, is used to support the rotor; A fixed component that detachably connects the bracket to the rotor of the elevator permanent magnet synchronous traction machine; as well as A pushing mechanism, which is mounted on the bracket, is used to push the bracket relative to the base of the elevator permanent magnet synchronous traction machine when the rotor is disassembled, so as to drive the rotor to move out.

2. The apparatus according to claim 1, characterized in that, The support track includes two slide rails and a connector, which connects the two parallel slide rails to form an H-shaped structure.

3. The apparatus according to claim 2, characterized in that, One end of the slide rail has a first fixed waist-shaped hole; Furthermore, the device also includes: A pressure plate is disposed above the first fixed oblong hole of the slide rail and has a first through hole. A bolt and nut assembly comprising a bolt and a nut, the bolt passing through a first through hole and a first fixing slotted hole and engaging with the nut to clamp a portion of the machine beam between the pressure plate and the slide rail, thereby mounting the support rail onto the machine beam.

4. The apparatus according to claim 2, characterized in that, The sliding frame includes: A carriage, comprising a frame consisting of a first crossbeam, a second crossbeam, a first longitudinal beam connecting one end of the first and second crossbeams, and a second longitudinal beam connecting the other ends of the first and second crossbeams; and At least two sliders are connected to two opposite edges of the frame, and the sliders have grooves for engaging with the slide rail to allow the sliding frame to slide on the slide rail.

5. The apparatus according to claim 4, characterized in that, The at least two sliders include a first slider and a second slider respectively disposed at both ends of the first crossbeam, and a third slider and a fourth slider respectively disposed at both ends of the second crossbeam.

6. The apparatus according to claim 4, characterized in that, The support includes: Vertical support member, which has: Two push-up waist-shaped holes for a portion of the push-up mechanism to pass through, and Two rotors are connected by oblong holes, located between the push oblong holes, through which the fixing component passes; A horizontal support member is connected to the lower end of the vertical support member and is orthogonal to the vertical support member; A diagonal brace, which connects the vertical support and the horizontal support and is inclined relative to both.

7. The apparatus according to claim 6, characterized in that, It includes two of the aforementioned supports.

8. The apparatus according to claim 6, characterized in that, The horizontal support has two spaced-apart second through holes. The first and second crossbeams of the carriage are respectively provided with second fixing waist-shaped holes. The bracket and the sliding frame are fixed together by bolts passing through the second through hole and the second fixed waist-shaped hole.

9. The apparatus according to claim 6, characterized in that, The pushing mechanism includes: A push nut that clamps the push oblong hole; A push bolt passes through the push nut and the push slotted hole to contact the base, and is configured to apply a thrust to the base by turning the push bolt during rotor removal, so as to remove the rotor by a reaction force corresponding to the thrust.

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