Tool suitable for assembling stator and rotor of traction machine and using method of tool

Abstract

The invention provides a tool suitable for assembling a stator and a rotor of a traction machine, which enables the stator and the rotor not to collide during assembling and ensures that magnetic steel is not damaged. The device comprises a small-diameter sleeve; and a large-diameter spacer sleeve. In the assembled state, the small-diameter sleeve is located in the center of a lower end plate of the large-diameter spacer sleeve and arranged in a downward protruding mode, the lower end of the small-diameter sleeve is open, a rotating shaft seam allowance is formed in the inner ring wall of the lower end of the small-diameter sleeve, and the upper end of a rotating shaft of a traction wheel is tightly sleeved with the rotating shaft seam allowance. The diameter of the outer ring of the large-diameter spacer sleeve is smaller than the equivalent diameter of the inner cavity of the stator assembly, and the diameter of the outer ring of the large-diameter spacer sleeve is larger than the equivalent outer diameter of the rotor; the small-diameter sleeve and the large-diameter spacer sleeve are hard plastic parts.

Description

Technical Field

[0001] The present invention relates to the technical field of traction machine assembly, and in particular to a tool suitable for assembling a stator and a rotor of a traction machine. The present invention also provides a method for using the tool. Background Art

[0002] An elevator traction machine is the elevator's power source, also known as the main unit. Its function is to transmit and transfer power to the elevator. It consists of a motor, brake, coupling, reduction gear, traction sheave, frame, guide pulley, and an attached handwheel. Assembly methods vary depending on the model. Some traction machine motors are not assembled and then connected to the traction sheave's rotating shaft. Instead, the motor's stator and rotor are assembled separately. The rotor is secured to the traction sheave's rotating shaft, and the stator assembly is secured to the inner circumference of the motor housing. The rotor is then inserted into the inner cavity formed by the stator assembly. However, during assembly, after the stator is pressed into the housing and then joined to the rotor, the permanent magnets attached to the rotor surface generate magnetic forces that collide with the stator assembly during direct assembly, often damaging the magnets. Therefore, there is an urgent need to develop a tooling system for assembling the stator and rotor to prevent collision and damage to the magnets. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a tool suitable for assembling the stator and rotor of a traction machine, which prevents the stator and rotor from colliding during assembly and ensures that the magnetic steel is not damaged.

[0004] A tool suitable for assembling a stator and a rotor of a traction machine, characterized in that it comprises:

[0005] Small diameter sleeve;

[0006] and large diameter bushings;

[0007] In the assembled state, the small diameter sleeve is located at the center of the lower end plate of the large diameter stop sleeve and is convex downwardly arranged. The lower end of the small diameter sleeve is open. The inner ring wall of the lower end of the small diameter sleeve is provided with a rotating shaft stop. The rotating shaft stop is tightly fitted on the upper end of the rotating shaft of the traction wheel. The outer ring diameter of the large diameter stop sleeve is smaller than the equivalent diameter of the inner cavity of the stator assembly. The outer ring diameter of the large diameter stop sleeve is larger than the equivalent outer diameter of the rotor. The large diameter stop sleeve;

[0008] The small-diameter sleeve and the large-diameter stop sleeve are hard plastic parts.

[0009] It is further characterized by:

[0010] One end surface of the large-diameter stop sleeve away from the small-diameter sleeve is an open structure;

[0011] The invention also includes a pressure plate and a fastening bolt, wherein an inner concave center screw hole is provided at the center position of the upper end of the rotating shaft, and the lower end plate of the large-diameter stop sleeve is a hollow structure corresponding to the inner diameter area of the small-diameter sleeve, and the equivalent diameter of the pressure plate is larger than the inner diameter of the small-diameter sleeve. The pressure plate is press-fitted on the upper surface of the lower end plate of the large-diameter sleeve, and a through hole is provided at the center of the pressure plate. The fastening bolt is fixed in the inner concave center screw hole after passing through the through hole, which makes the small-diameter sleeve firmly fixed on the rotating shaft and centered, so that the large-diameter stop sleeve can be ensured to be aligned with the rotating shaft during the assembly process, and even if magnetic force is generated between the permanent magnet of the rotor and the stator during the assembly process, it can also reliably ensure that the assembly is smooth and reliable.

[0012] After the shaft stop of the small-diameter sleeve is fixedly sleeved on the upper end of the shaft, the lower surface of the lower end plate of the large-diameter stop sleeve is 2 to 5 mm higher than the upper end surface of the rotor, ensuring smooth assembly;

[0013] The height of the large-diameter stopper sleeve is one-fifth to one-quarter of the height of the stator assembly, and after the motor housing corresponding to the stator assembly is inserted downward into place, the upper end of the large-diameter stopper sleeve protrudes above the upper end surface of the stator assembly, ensuring reliable removal of the entire tooling;

[0014] The upper circumference of the large-diameter stopper sleeve is a first guiding cone surface that expands from top to bottom, ensuring rapid insertion into the inner cavity of the stator assembly;

[0015] The lower circumference of the large-diameter stopper sleeve is a second guiding conical surface that closes from top to bottom, which ensures that no sharp hard impact is generated on the stator assembly.

[0016] A method for using a tool suitable for assembling a stator and a rotor of a traction machine, characterized in that it comprises the following steps:

[0017] S1. Install the lower end cover of the motor on the upper end plate of the traction sheave;

[0018] S2. Screw the rotor onto the rotating shaft of the traction sheave so that the upper end of the rotating shaft of the traction sheave is convex, and then arrange the rotating shaft vertically so that the rotor is located at the top;

[0019] S3, pre-installing the stator assembly in the inner cavity of the motor housing;

[0020] S4. Fit the shaft stop of the small-diameter sleeve of the tooling tightly onto the upper end of the shaft of the traction sheave;

[0021] S5. Use the pressure plate and fastening bolts to center the fixture on the upper area of the rotating shaft, and ensure that the circular surface of the large-diameter retaining sleeve completely covers the equivalent outer diameter of the rotor;

[0022] S6. Place the motor housing directly above the rotating shaft, and align the stator assembly and the rotating shaft in the center.

[0023] S7. The motor housing is driven downward relative to the rotating shaft by an external force. The magnetic force of the permanent magnets causes the stator assembly to generate magnetic force and interact with each other. The large-diameter stopper sleeve is used to prevent direct contact between the stator assembly and the permanent magnets of the rotor.

[0024] S8. The motor housing is inserted into the corresponding positioning groove of the motor lower end cover to complete the fastening of the motor housing and the motor lower end cover;

[0025] S9. Loosen the fastening bolts and remove the pressure plate and tooling;

[0026] S10. Install the motor cover on the motor housing and tighten it.

[0027] After adopting the present invention, the small-diameter sleeve of the tooling is sleeved on the upper end of the rotating shaft through the rotating shaft stop, and since the outer ring diameter of the large-diameter stop sleeve is smaller than the equivalent diameter of the inner cavity of the stator assembly, and the outer ring diameter of the large-diameter stop sleeve is larger than the equivalent outer diameter of the rotor, during the insertion of the rotor and stator assemblies, the magnetic force of the permanent magnet will cause the stator assembly to generate magnetic force and interact with each other, and the large-diameter stop sleeve is used to prevent the stator assembly and the permanent magnet of the rotor from making direct contact; it prevents the stator and rotor from colliding during assembly, ensuring that the magnetic steel is not damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A top view of the tooling of the present invention (without the pressure plate and fastening bolts);

[0029] Figure 2 It is a front view and cross-sectional view of the tooling of the present invention (including the pressing plate and fastening bolts);

[0030] Figure 3 This is a schematic diagram of a method for assembling a stator and a rotor using the tooling of the present invention;

[0031] The names corresponding to the serial numbers in the figure are as follows:

[0032] Small diameter sleeve 10, rotating shaft stop 11, large diameter stop sleeve 20, lower end plate 21, first guide cone 22, second guide cone 23, pressure plate 30, fastening bolt 40, traction wheel 50, upper end plate 51, rotating shaft 60, concave center screw hole 61, stator assembly 70, rotor 80, motor housing 90, motor lower end cover 91, tooling 100. DETAILED DESCRIPTION

[0033] A tool suitable for assembling the stator and rotor of a traction machine, see Figure 1-Figure 3 , which includes:

[0034] Small diameter sleeve 10;

[0035] and a large diameter stop sleeve 20;

[0036] In the assembled state, the small-diameter sleeve 10 is located at the center of the lower end plate 21 of the large-diameter stopper sleeve 20 and is convex downward. The lower end of the small-diameter sleeve 10 is open. The inner ring wall of the lower end of the small-diameter sleeve 10 is provided with a shaft stop 11. The shaft stop 11 is tightly fitted on the upper end of the rotating shaft 60 of the traction sheave 50. The outer ring diameter of the large-diameter stopper sleeve 20 is smaller than the equivalent diameter of the inner cavity of the stator assembly 70, and the outer ring diameter of the large-diameter stopper sleeve 20 is larger than the equivalent outer diameter of the rotor 80.

[0037] The small-diameter sleeve 10 and the large-diameter stopper sleeve 20 are hard plastic parts, which are made by integral injection molding. The cost is not high and no extra cost is added.

[0038] In a specific embodiment, an end surface of the large-diameter stopper sleeve 20 away from the small-diameter sleeve 10 is an open structure.

[0039] When the tooling is assembled, it also includes a centering fastener, which includes a pressure plate 30 and a fastening bolt 40. At this time, the center position of the upper end of the rotating shaft 60 is provided with an inner concave center screw hole 61, and the lower end plate 21 of the large diameter stop sleeve 20 corresponds to the inner diameter area of the small diameter sleeve 10. The equivalent diameter of the pressure plate 30 is larger than the inner diameter of the small diameter sleeve 10, and the pressure plate 30 is pressed onto the upper surface of the lower end plate 21 of the large diameter sleeve 20. A through hole is provided in the center of the pressure plate 30, and the fastening bolt 40 is fixed in the inner concave center screw hole 61 after passing through the through hole, which makes the small diameter sleeve 10 firmly fixed to the rotating shaft 60 and centered. The large diameter stop sleeve 20 is ensured to be in a centered state with the rotating shaft 60 during the assembly process, even if magnetic force occurs between the permanent magnet of the rotor 80 and the stator assembly 70 during the assembly process, it can reliably ensure that the assembly is smooth and reliable.

[0040] After the shaft stop 11 of the small-diameter sleeve 10 is securely sleeved on the upper end of the shaft 60, the lower surface of the lower end plate 21 of the large-diameter stop sleeve 20 is 2 to 5 mm higher than the upper end surface of the rotor 80, ensuring smooth assembly.

[0041] The height of the large diameter stopper sleeve 20 is one fifth to one quarter of the height of the stator assembly 70, and after the motor housing 90 corresponding to the stator assembly 70 is inserted downward into place, the upper end of the large diameter stopper sleeve 20 protrudes above the upper end surface of the stator assembly 70, ensuring reliable removal of the entire tooling;

[0042] The upper circumference of the large diameter stopper sleeve 20 is a first guide cone 22 with a top-down expansion, which ensures quick insertion into the inner cavity of the stator assembly 70;

[0043] The lower circumference of the large-diameter stopper sleeve 20 is a second guiding conical surface 23 that closes from top to bottom, which ensures that no sharp hard impact is generated on the stator assembly 70.

[0044] Its working principle is as follows: the small-diameter sleeve 10 of the tooling 100 is mounted on the upper end of the rotating shaft 60 through the rotating shaft stop 11, and since the outer ring diameter of the large-diameter stop sleeve 20 is smaller than the equivalent diameter of the inner cavity of the stator assembly 70, the outer ring diameter of the large-diameter stop sleeve 20 is larger than the equivalent outer diameter of the rotor 80. During the insertion of the rotor 80 and the stator assembly 70, the magnetic force of the permanent magnet will cause the stator assembly 70 to generate magnetic force and interact with each other. The large-diameter stop sleeve 20 is used to prevent the permanent magnets of the stator assembly 70 and the rotor 80 from making direct contact; it prevents the stator assembly 70 and the rotor 80 from colliding during assembly, ensuring that the magnetic steel is not damaged.

[0045] A method for using a tool suitable for assembling a stator and a rotor of a traction machine, comprising the following steps:

[0046] S1. Install the motor lower end cover 91 on the upper end plate 51 of the traction sheave housing;

[0047] S2. The rotor 80 is fixedly mounted on the rotating shaft 60 of the traction sheave 50 so that the upper end portion of the rotating shaft 60 of the traction sheave 50 is convex. Then, the rotating shaft 60 is arranged vertically so that the rotor 80 is located at the upper end.

[0048] S3, pre-install the stator assembly 70 in the inner cavity of the motor housing 90;

[0049] S4. Tightly fit the shaft stop 11 of the small-diameter sleeve 10 of the tool 100 onto the upper end of the shaft 60 of the traction sheave 50;

[0050] S5. Use the pressing plate 30 and the fastening bolts 40 to center the tooling 100 above the rotating shaft 60 , and ensure that the circular surface of the large-diameter retaining sleeve 20 completely covers the equivalent outer diameter of the rotor 80 .

[0051] S6. Place the motor housing 90 directly above the rotating shaft 60, and arrange the stator assembly 70 and the rotating shaft 80 in a centrally aligned manner;

[0052] S7. The motor housing 90 is driven downward relative to the rotating shaft 60 by an external force. The magnetic force of the permanent magnets causes the stator assembly to generate magnetic force and interact with each other. The large-diameter stopper sleeve 20 is used to prevent the stator assembly 70 and the permanent magnets of the rotor 80 from making direct contact.

[0053] S8. The motor housing 90 is inserted into the corresponding positioning groove of the motor lower end cover 91 to complete the fastening of the motor housing 90 and the motor lower end cover 91.

[0054] S9, loosen the fastening bolts 60, remove the pressing plate 50 and the tooling 100;

[0055] S10, install the motor upper cover (not shown) on the motor housing 90 and tighten it.

[0056] In a preferred embodiment, the motor lower end cover 91 and the upper end plate 51 of the traction sheave housing are formed on the same plate.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0058] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A tool suitable for assembling the stator and rotor of a traction machine, characterized in that: It includes: Small diameter sleeve; and large diameter bushings; In the assembled state, the small diameter sleeve is located at the center of the lower end plate of the large diameter stop sleeve and is convex downwardly arranged. The lower end of the small diameter sleeve is open. The inner ring wall of the lower end of the small diameter sleeve is provided with a rotating shaft stop. The rotating shaft stop is tightly fitted on the upper end of the rotating shaft of the traction wheel. The outer ring diameter of the large diameter stop sleeve is smaller than the equivalent diameter of the inner cavity of the stator assembly. The outer ring diameter of the large diameter stop sleeve is larger than the equivalent outer diameter of the rotor. The large diameter stop sleeve; The small-diameter sleeve and the large-diameter stop sleeve are hard plastic parts.

2. The tooling for assembling the stator and rotor of a traction machine according to claim 1, characterized in that: An end surface of the large-diameter stop sleeve away from the small-diameter sleeve is an open structure.

3. The tooling for assembling the stator and rotor of a traction machine according to claim 2, characterized in that: It also includes a pressure plate and a fastening bolt. At this time, an indented center screw hole is provided at the center position of the upper end of the rotating shaft. The lower end plate of the large-diameter stop sleeve is a hollow structure corresponding to the inner diameter area of the small-diameter sleeve. The equivalent diameter of the pressure plate is larger than the inner diameter of the small-diameter sleeve. The pressure plate is pressed onto the upper surface of the lower end plate of the large-diameter sleeve. A through hole is provided at the center of the pressure plate. The fastening bolt passes through the through hole and is fixed in the indented center screw hole.

4. The tooling for assembling the stator and rotor of a traction machine according to claim 1, characterized in that: After the shaft stop of the small-diameter sleeve is fixedly sleeved on the upper end of the shaft, the lower surface of the lower end plate of the large-diameter stop sleeve is 2 to 5 mm higher than the upper end surface of the rotor.

5. The tooling for assembling the stator and rotor of a traction machine according to claim 1, characterized in that: The height of the large diameter stop sleeve is one fifth to one quarter of the height of the stator assembly, and after the motor housing corresponding to the stator assembly is inserted downward into place, the upper end of the large diameter stop sleeve protrudes above the upper end surface of the stator assembly.

6. The tooling for assembling the stator and rotor of a traction machine according to claim 1, characterized in that: The upper circumference of the large-diameter stop sleeve is a first guiding conical surface that expands from top to bottom.

7. The tooling for assembling the stator and rotor of a traction machine according to claim 1, characterized in that: The lower circumference of the large-diameter stop sleeve is a second guiding conical surface that closes from top to bottom.

8. A method for using a tool for assembling a stator and a rotor of a traction machine, which uses the tool for assembling a stator and a rotor of a traction machine according to claim 3, characterized in that: It includes the following steps: S1. Install the lower end cover of the motor on the upper end plate of the traction sheave; S2. Screw the rotor onto the rotating shaft of the traction sheave so that the upper end of the rotating shaft of the traction sheave is convex, and then arrange the rotating shaft vertically so that the rotor is located at the top; S3, pre-installing the stator assembly in the inner cavity of the motor housing; S4. Fit the shaft stop of the small-diameter sleeve of the tooling tightly onto the upper end of the shaft of the traction sheave; S5. Use the pressure plate and fastening bolts to center the fixture on the upper area of the rotating shaft, and ensure that the circular surface of the large-diameter retaining sleeve completely covers the equivalent outer diameter of the rotor; S6. Place the motor housing directly above the rotating shaft, and align the stator assembly and the rotating shaft in the center. S7. The motor housing is driven downward relative to the rotating shaft by an external force. The magnetic force of the permanent magnets causes the stator assembly to generate magnetic force and interact with each other. The large-diameter stopper sleeve is used to prevent direct contact between the stator assembly and the permanent magnets of the rotor. S8. The motor housing is inserted into the corresponding positioning groove of the motor lower end cover to complete the fastening of the motor housing and the motor lower end cover; S9. Loosen the fastening bolts and remove the pressure plate and tooling; S10. Install the motor cover on the motor housing and tighten it.

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