Assembly tool of motor rotor

Abstract

The utility model provides an assembly tool of a motor rotor, which comprises a guide rod assembly, the guide rod assembly comprises a core rod and a sleeve, the sleeve is sleeved on the periphery of the core rod, the hardness of the core rod is greater than that of the sleeve, the guide rod assembly is of a cylinder structure, and the guide rod assembly is provided with a guide rod. One axial end of the guide rod assembly can be connected with the rotor, the other axial end of the guide rod assembly is inserted into a shaft hole in the motor shell so as to guide and pull the rotor into the shaft hole, and the shaft hole comprises a shaft hole of a stator and a shaft hole of a bearing. According to the utility model, the whole assembly can not be greatly bent due to forced reasons and the like, and the guide effect on the rotor is improved, so that the assembly centering effect on the motor rotor is improved, the rotor is prevented from deviating from the central position and rubbing with a bearing, and the production efficiency is improved. The problems that the rotor cannot be centered, so that the rotor deviates from the central position, and the rotor is scratched with a bearing are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a motor rotor's assembly tool. BACKGROUND

[0002] Permanent magnet motor because rotor has the magnetized permanent magnet, so at the rotor assembly, the shell on the stator core etc. Magnetic guide zero parts will produce very strong magnetic attraction to the rotor, cause the rotor to deviate from the center position, cannot smoothly into the shaft, centering, in addition, for the permanent magnet motor of using magnetic suspension bearing, this kind of deviation will also make the rotor and magnetic suspension bearing produce friction, scratch, cause the damage of rotor and bearing. Therefore in the magnetic suspension permanent magnet motor rotor assembly, must use assembly tool and other auxiliary structure to avoid the rotor deviation from the center position, and the scratch of bearing.

[0003] In the prior art, the assembly axial magnetic bearing will scratch or even cannot move, on the one hand, the assembly will be difficult, on the other hand, the rotor and the magnetic bearing cannot be avoided from being damaged; Even the supporting frame is difficult to withstand the gravity deviation caused by the super long metal rod, the connection is easy to break, and the parts itself is also difficult to center due to the gravity.

[0004] Since the permanent magnet motor in the prior art cannot effectively complete the centering during the rotor assembly, the rotor deviates from the center position and scratches the bearing, the utility model discloses a kind of assembly tool of motor rotor. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model wants to solve the technical problem in prior art that permanent magnet motor cannot effectively complete the centering during the rotor assembly, which leads to the rotor deviating from the center position and scratching the bearing, thereby providing a kind of assembly tool of motor rotor.

[0006] In order to solve the above problems, the utility model provides an assembly tool of motor rotor, which comprises:

[0007] The guide rod assembly comprises a core rod and a sleeve, the sleeve is sleeved on the outer periphery of the core rod, the hardness of the core rod is greater than that of the sleeve, the guide rod assembly is a rotary body structure, one end of the guide rod assembly in the axial direction can be connected with the rotor, the other end of the guide rod assembly in the axial direction is inserted into the shaft hole in the interior of the motor shell, so as to guide and pull the rotor into the shaft hole, the shaft hole comprises the shaft hole of the stator and the shaft hole of the bearing.

[0008] In some embodiments,

[0009] The core rod is made of hard metal material, and the sleeve is made of deformable material, which is at least one of nylon, plastic and rubber.

[0010] In some embodiments,

[0011] An axial end of the guide rod assembly connected with the rotor is a connecting end, an axial end of the guide rod assembly firstly inserted into the inside of the motor housing is an insertion end, and an outer diameter of the sleeve relatively close to the insertion end is smaller than an outer diameter of the sleeve relatively close to the connecting end along the axial direction of the guide rod assembly.

[0012] In some embodiments,

[0013] The sleeve includes at least two sleeves along the axial direction of the guide rod assembly, and the at least two sleeves are sleeved on the outer periphery of the core rod; and / or the outer diameter of the sleeve gradually increases from the insertion end to the connecting end along the axial direction of the guide rod assembly.

[0014] In some embodiments,

[0015] The sleeve includes a first sleeve, a second sleeve and a third sleeve along the axial direction of the guide rod assembly, the first sleeve is a sleeve firstly inserted into the inside of the motor housing, the third sleeve is a sleeve lastly inserted into the inside of the motor housing, the second sleeve is connected between the first sleeve and the third sleeve, and the first sleeve, the second sleeve and the third sleeve are all cylindrical bodies, and an outer diameter of the first sleeve is smaller than an outer diameter of the second sleeve, and an outer diameter of the second sleeve is smaller than an outer diameter of the third sleeve.

[0016] In some embodiments,

[0017] The first sleeve includes a first cylindrical body and a circular ring body, the circular ring body is connected to an axial end of the first cylindrical body, an inner diameter of the circular ring body is smaller than an inner diameter of the first cylindrical body, so that an axial end surface of the circular ring body facing the first cylindrical body is connected with an inner wall of the first cylindrical body to form a stepped surface, thereby limiting the axial end of the core rod, and the circular ring body forms the insertion end of the guide rod assembly.

[0018] In some embodiments,

[0019] Further comprising a fastener, an inner periphery of the circular ring body forms a mounting hole, and the fastener passes through the mounting hole to be fixedly connected with an axial end of the core rod.

[0020] In some embodiments,

[0021] The second sleeve includes a second cylindrical body, and the third sleeve includes a third cylindrical body, an axial end of the second cylindrical body is connected with the first cylindrical body, and an axial end of the third cylindrical body is connected with the second cylindrical body.

[0022] In some embodiments,

[0023] The core rod comprises a rotary body structure and a protrusion, the rotary body structure is inserted into the sleeve, the protrusion is connected to an axial end of the rotary body structure facing the rotor and protrudes in the axial direction, the outer diameter of the protrusion is smaller than the outer diameter of the rotary body structure at the joint, the protrusion is located outside the sleeve and can be inserted into the rotor to form the connecting end of the guide rod assembly.

[0024] In some embodiments,

[0025] The motor housing is provided with a guide seat, the stator and the bearing, the bearing comprises a radial bearing and an axial bearing, along the axial direction, the guide seat, the radial bearing, the stator and the axial bearing are sequentially arranged, and the guide rod assembly is connected with the rotor through the connecting end, and the insertion end of the guide rod assembly is sequentially inserted and assembled from the axial bearing to the direction of the stator, the radial bearing and the guide seat.

[0026] In some embodiments,

[0027] The inner periphery of the axial bearing is further provided with an auxiliary centering ring to allow the rotor to be inserted into the auxiliary centering ring, and the axial end of the rotor away from the guide rod assembly is further connected with a lifting ring.

[0028] The motor rotor assembly tool has the following beneficial effects:

[0029] 1. The utility model discloses a guide rod assembly comprising a core rod and a sleeve, and the sleeve is sleeved on the outer periphery of the core rod, which can be connected with the rotor at one axial end and inserted into the shaft hole of the motor housing at the other axial end to complete the guidance and traction of the motor rotor, and the hardness of the sleeve is less than that of the core rod, which can be inserted into the inner hole of the stator, bearing and other structures to provide guidance for the rotor, the hardness of the core rod is greater than that of the sleeve and located on the outer periphery of the sleeve, which can ensure that the overall assembly does not bend significantly due to forced reasons, improve the guidance effect of the rotor, improve the assembly and centering effect of the motor rotor, prevent the rotor from deviating from the center position and rubbing with the bearing, solve the problem of deviation from the center position due to the failure to complete the centering of the rotor and solve the problem of rubbing with the bearing.

[0030] 2.The sleeve is made of material with low wall core rod hardness (preferably deformable material such as nylon, plastic and rubber), which can effectively protect the stator and bearing during the process of inserting into the inner hole of the bearing and the stator; the sleeve is arranged to be relatively close to the insertion end, and the outer diameter of the sleeve is smaller than that of the connecting end (including multi-step sleeve and gradually changing sleeve), which can make the small end of the outer diameter be inserted first and the large end be inserted later, improve the guiding effect and centering effect; the multi-step sleeve structure can reduce the machining requirements of most parts, and can replace the corresponding parts instead of the whole when some parts are damaged, thereby reducing the machining cost.

[0031] 3.The utility model discloses still through the other side of not having the guiding structure, has adopted the mode of adding the protection aluminum ring on partial magnetic bearing parts and installing to the shell first, and the auxiliary rotor is centered, reduces the complicated and dangerous rotor-magnetic bearing preloading work step, improves the centering assembly effect of rotor. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the assembly process structure diagram of the motor rotor of the utility model;

[0033] Figure 2 is Figure 1 the partial close-up view of I part of

[0034] Figure 3 Figure 1 the partial close-up view of II part of

[0035] Figure 4 the assembly process schematic diagram of the axial bearing and the aluminum ring of the utility model;

[0036] Figure 5 is the explosion structure diagram of the guiding rod assembly of the utility model;

[0037] Figure 6 is the longitudinal sectional view of the guiding rod assembly of the utility model after assembly is completed;

[0038] Figure 7 is the state schematic diagram of the motor rotor of the utility model after assembly is completed.

[0039] The reference signs are represented as:

[0040] 1, motor housing; 2, stator; 3, radial bearing; 4, guide seat; 5, axial bearing; 52, auxiliary centering ring; 6, rotor; 7, guide rod assembly; 71, core rod; 711, rotary body structure; 712, protrusion; 70, sleeve; 72, third sleeve; 721, third cylinder body; 73, second sleeve; 731, second cylinder body; 74, first sleeve; 741, first cylinder body; 742, circular ring cylinder; 743, mounting hole; 75, fastener; 8, lifting eye. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0042] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0043] Unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in the various embodiments described herein are not limiting. It should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the description of the application. In all examples shown and discussed herein, any specific value should be interpreted as merely an example, and not as a limitation. Thus, other examples of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0044] In the description of the utility model, it needs to be understood that the orientation words such as '' front, back, up, down, left, right '' '' horizontal, vertical, perpendicular, horizontal '' and '' top, bottom '' and the like indicated orientation or positional relationship generally based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, in the case where no contrary statement is made, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore it can not be understood as the limitation of the protection scope of the utility model;The orientation words '' inside, outside '' refer to the inside and outside relative to the contour of each component.

[0045] For the convenience of description, spatial relative terms such as '' above'', '' above'', '' upper surface'', '' upper '' and the like can be used here to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing.It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawing.For example, if the device in the drawing is inverted, the device described as '' above '' or '' above '' other devices or structures will be positioned '' below '' or '' below '' other devices or structures.Exemplary terms '' above '' can include both '' above '' and '' below ''.The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used here is interpreted accordingly.

[0046] In addition, it needs to be explained that the use of '' first'', '' second '' and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore it can not be understood as the limitation of the protection scope of the utility model.

[0047] As Figures 1-7 As shown in the utility model provides a kind of motor rotor (preferably the rotor of magnetic levitation permanent magnet motor) assembly tool, it includes:

[0048] Guide rod assembly 7, the guide rod assembly 7 includes core rod 71 and sleeve 70, the sleeve 70 is set on the outer periphery of the core rod 71, the hardness of the core rod 71 is greater than the hardness of the sleeve 70, the guide rod assembly 7 is a rotary body structure, the axial one end of the guide rod assembly 7 can be connected with rotor 6, the axial other end of the guide rod assembly 7 is inserted into the shaft hole in the interior of motor housing 1, to guide the traction of rotor 6 into the shaft hole, the shaft hole includes the shaft hole of stator and the shaft hole of bearing.

[0049] The utility model discloses a guide rod assembly including core pole and sleeve, and the sleeve is sleeved on the outer periphery of core pole, can pass through the axial one end of guide rod assembly and is connected with rotor, and the axial other end is inserted to the shaft hole of motor casing, to complete the guidance traction of motor rotor, and the hardness of sleeve is less than core pole, can pass through the cooperation of the inner hole of sleeve and stator, bearing etc.

[0050] In some embodiments,

[0051] The core pole 71 is made of hard metal material, and the sleeve 70 is made of deformable material, which is at least one of nylon, plastic and rubber.

[0052] This is the preferred material of the core pole and the sleeve of the utility model, the core pole adopts hard metal material to effectively guide and prevent bending deformation, and the sleeve adopts deformable material such as nylon, plastic and rubber to protect the bearing, the stator and other structures while guiding the rotor, preventing scratching and damaging them.

[0053] The utility model discloses a kind of assembly more convenient magnetic levitation permanent magnet motor assembly tool and auxiliary structure, without complex preparation before entering shaft, can guarantee that rotor does not deviate from central position and smoothly enters shaft during entering shaft, in addition, the component that the component plays a guiding role simultaneously considers the protection of magnetic bearing and the overall anti-deformation bending performance.

[0054] In some embodiments,

[0055] The axial one end of the guide rod assembly 7 connected with the rotor 6 is a connecting end, the axial one end of the guide rod assembly 7 inserted into the motor casing 1 is an insertion end, and the outer diameter of the sleeve 70 relatively close to the insertion end is smaller than that of the sleeve 70 relatively close to the connecting end along the axial direction of the guide rod assembly 7.

[0056] This is the preferred structure of the guide rod assembly of the utility model, that is, including the connecting end connected with the rotor and the insertion end inserted into the casing, and the utility model further sets the outer diameter of the sleeve relatively close to the insertion end to be smaller than that of the sleeve relatively close to the connecting end, so that the small end is inserted first and the large end is inserted later, further improving the guiding effect and centering effect of the rotor.

[0057] In some embodiments,

[0058] In some embodiments, the sleeve 70 comprises a first sleeve 74, a second sleeve 73 and a third sleeve 72 along the axial direction of the guide rod assembly 7, the first sleeve 74 being the sleeve firstly inserted into the motor housing 1, the third sleeve 72 being the sleeve lastly inserted into the motor housing 1, the second sleeve 73 being connected between the first sleeve 74 and the third sleeve 72, and the first sleeve 74, the second sleeve 73 and the third sleeve 72 all being cylindrical bodies, and the outer diameter of the first sleeve 74 being smaller than that of the second sleeve 73, and the outer diameter of the second sleeve 73 being smaller than that of the third sleeve 72.

[0059] The sleeve preferably comprises a plurality of sleeves, which can be used for guiding and centering the rotor, and can be easily processed, maintained and replaced, and the processing requirements of most parts are reduced, and the processing cost is reduced when only the corresponding parts are replaced instead of the whole replacement when some parts are damaged.

[0060] In some embodiments,

[0061] In some embodiments, the sleeve 70 comprises a first sleeve 74, a second sleeve 73 and a third sleeve 72 along the axial direction of the guide rod assembly 7, the first sleeve 74 being the sleeve firstly inserted into the motor housing 1, the third sleeve 72 being the sleeve lastly inserted into the motor housing 1, the second sleeve 73 being connected between the first sleeve 74 and the third sleeve 72, and the first sleeve 74, the second sleeve 73 and the third sleeve 72 all being cylindrical bodies, and the outer diameter of the first sleeve 74 being smaller than that of the second sleeve 73, and the outer diameter of the second sleeve 73 being smaller than that of the third sleeve 72.

[0062] The sleeve preferably comprises a plurality of sleeves, which can be used for guiding and centering the rotor, and can be easily processed, maintained and replaced, and the processing requirements of most parts are reduced, and the processing cost is reduced when only the corresponding parts are replaced instead of the whole replacement when some parts are damaged.

[0063] The guide assembly preferably adopts the structure of the hard metal core rod + the multi-stage stepped nylon sleeve, which can not only ensure that the whole assembly will not be bent due to forced reasons, but also can protect the magnetic bearing and other devices, and the multi-stage stepped nylon sleeve structure can reduce the processing requirements of most parts, and only the corresponding parts can be replaced instead of the whole replacement when some parts are damaged, thereby reducing the processing cost.

[0064] As Figures 5-6The guide rod assembly 7 is composed of a core rod 71, an upper sleeve (a third sleeve 72), a middle sleeve (a second sleeve 73), a lower sleeve (a first sleeve 74) and a screw (a fastener 75). The core rod 71 is made of hard metal (or alloy) material, has external threads on one side matched with the central hole of the rotor 6, has internal threads on the other side matched with the fastener 75, and has the same outer diameter as the upper sleeve, the middle sleeve and the lower sleeve, and is matched with the three sleeves with small gaps. Figures 5-6 The three sleeves are made of nylon (or polytetrafluoroethylene plastic material), and as shown in FIG. 3, the outer diameters of the three sleeves are not much different, and the size relationship is upper sleeve > middle sleeve > lower sleeve, arranged in a stepped manner. The outer diameter of the upper sleeve should be consistent with the inner diameter of the radial bearing 3 and the guide seat 4, and is matched with the two with small gaps. The outer diameter processing precision requirement is relatively high. The processing precision requirements of the other two sleeves are lower because there is no matching requirement. In actual processing, the three-section sleeve is more difficult to process than the whole nylon rod, so the processing cost is greatly reduced compared with the whole nylon rod.

[0065] In some embodiments,

[0066] The first sleeve 74 includes a first cylindrical body 741 and a circular ring column body 742 connected to an axial end of the first cylindrical body 741. The inner diameter of the circular ring column body 742 is smaller than the inner diameter of the first cylindrical body 741, so that the axial end face of the circular ring column body 742 facing the first cylindrical body 741 is connected with the inner wall of the first cylindrical body 741 to form a stepped surface to limit the axial end of the core rod 71. The circular ring column body 742 forms the insertion end of the guide rod assembly 7.

[0067] This is a further preferred structure of the first sleeve of the utility model, which includes a first cylindrical body and a circular ring column body connected to form a stepped surface to limit the axial end of the core rod. The circular ring column body covers the core rod inside, so that the relatively flexible circular ring column body is the insertion end, further improving the protection of the bearing, stator and other components to prevent scratching damage.

[0068] In some embodiments,

[0069] The fastener 75 passes through the mounting hole 743 to be fixedly connected with the axial end of the core rod 71.

[0070] The utility model further includes a mounting hole in the fastener and the circular ring column body, which can fasten the core rod and the circular ring column body into one, so that the core rod and the sleeve form an integrated structure, facilitating the guiding and insertion of the rotor from top to bottom.

[0071] In some embodiments,

[0072] The second sleeve 73 comprises a second cylinder 731, and the third sleeve 72 comprises a third cylinder 721, and an axial one end of the second cylinder 731 is connected with the first cylinder 741, and an axial other end of the second cylinder 731 is connected with the third cylinder 721.

[0073] The second sleeve and the third sleeve of the utility model are preferably cylindrical structures, and can form a sleeve structure in which the first cylinder, the second cylinder and the third cylinder are sequentially connected in the axial direction; the three can be fixedly connected or only abutted and connected, and the utility model preferably sequentially arranges the first sleeve, the second sleeve and the third sleeve from bottom to top, and the second sleeve and the third sleeve are abutted on the upper end of the first sleeve through gravity.

[0074] In some embodiments,

[0075] The core rod 71 comprises a rotary body structure 711 and a protrusion 712, the rotary body structure 711 is inserted into the sleeve 70, the protrusion 712 is connected to an axial one end of the rotary body structure 711 facing the rotor 6 and protrudes in the axial direction, the outer diameter of the protrusion 712 is smaller than the outer diameter of the rotary body structure 711 connected thereto, and the protrusion 712 is located outside the sleeve 70 and can be inserted and connected with the rotor 6 to form the connecting end of the guide rod assembly 7.

[0076] The core rod of the utility model preferably comprises a rotary body structure and a protrusion, the rotary body structure can be inserted and connected with the sleeve, the protrusion can be inserted and connected with the rotor to form a connecting end, and the outer diameter of the rotor is preferably equal to the outer diameter of the sleeve (preferably the third sleeve), so that the outer diameter of the protrusion is smaller than the outer diameter of the rotary body structure, which can achieve the purpose.

[0077] In some embodiments,

[0078] The motor housing 1 is provided with a guide seat 4, the stator 2 and the bearing, the bearing comprises a radial bearing 3 and an axial bearing 5, along the axial direction, the guide seat 4, the radial bearing 3, the stator 2 and the axial bearing 5 are sequentially arranged, and the guide rod assembly 7 is connected with the rotor 6 through the connecting end, and the guide rod assembly 7 is sequentially inserted and assembled from the axial bearing 5 to the direction of the stator 2, the radial bearing 3 and the guide seat 4 through the insertion end.

[0079] This is the internal structure of the motor of this utility model, and the guide rod assembly is inserted and assembled sequentially from the axial bearing, the stator, the radial bearing and the guide seat, so as to assemble the rotor into the above structure. Finally, the guide rod assembly is inserted below the guide seat and can be removed from the rotor, thus completing the centering guidance and assembly effect of the rotor.

[0080] by Figure 1 Taking the scenario shown in the diagram as an example, the entire motor assembly process is explained as follows: Before assembling the rotor, the stator 2, radial bearing 3, and axial bearing 5 should all be pre-installed in the motor housing 1. The guide seat 4 is one of the auxiliary tooling. If the rotor end does not exceed the end face of the radial bearing 3 after assembly, the guide rod assembly 7 only needs to cooperate with the inner circular surface of the radial bearing 3 to complete the guiding function, and the guide seat 4 is not required. However, if the rotor end face eventually exceeds the end face of the radial bearing 3, the guide seat 4 needs to be installed on the radial bearing 3. The inner diameter of the guide seat 4 is consistent with the inner diameter of the radial bearing 3. After the end face exceeds the end face of the radial bearing 3 during rotor assembly, the guide seat 4 continues to complete the final stage of guiding with the guide rod assembly 7. The present invention preferably includes the guide seat 4.

[0081] See Figure 1 After assembling the stator 2, radial bearing 3, guide seat 4, axial bearing 5, and aluminum ring, the motor housing 1 is flipped over so that the side containing the axial bearing 5 faces upwards. The rotor 6 is then assembled with the guide rod assembly 7 and lifting ring 8 and lifted, with one side of the guide rod assembly 7 hanging downwards. After roughly aligning with the center position, it is gradually lowered into the shaft. Before the rotor 6 contacts the mating surface of the protective aluminum ring, the lower sleeve of the guide rod assembly 7 should be close to the inner circle of the radial bearing 3. The outer diameter of the lower sleeve is similar to the inner diameter of the radial bearing, but still leaves a large gap. Therefore, the lower sleeve will not have difficulty entering the inner circle of the radial bearing 3 due to slight deviations in the rotor's center configuration. After entering, the guide rod assembly 7 can provide approximate guidance for the rotor 6. After the protective aluminum ring and rotor 6 are properly mated, the entire rotor will not deviate too much from the center position. Combined with the gradually increasing stepped outer diameter of the three sleeves in the guide rod assembly 7, the rotor will gradually achieve complete alignment during shaft insertion until the thrust plate end face of the rotor 6 contacts the upper end face of the axial bearing 5. Figure 7 As shown, the rotor assembly is now complete. The lifting ring 8, guide rod assembly 7, and guide seat 4 can be removed in sequence to complete the remaining motor assembly. Protected by the three nylon sleeves, even if the rotor comes into contact with or even collides with the radial bearing 3 during assembly, no damage will be caused to the interior of the radial bearing assembly. The sleeves that cannot be used after damage can be replaced. Compared with a whole metal rod as a guide, it can better protect bearings and other parts. The hard metal core rod ensures that when the rotor 6 is magnetically attracted and deflected, the pressure it exerts on the guide rod assembly 7 will not cause the entire assembly to deform or bend. It is more durable than a whole nylon rod / plastic rod / rubber rod.

[0082] In some embodiments,

[0083] The inner periphery of the axial bearing 5 is further provided with an auxiliary centering ring 52 (preferably an aluminum ring) to allow the rotor 6 to be inserted into the auxiliary centering ring 52, and the axial end of the rotor 6 away from the guide rod assembly 7 is further connected with a lifting ring 8.

[0084] The utility model discloses still through being in the other side of not having the guide structure, has adopted the mode of adding the protection aluminum ring on partial magnetic bearing parts and installing to the casing first, and the rotor centering is assisted, has reduced the complicated and dangerous rotor-magnetic bearing preloading work step, improved the centering assembly effect of rotor.

[0085] As Figure 4 , the axial bearing 5 and the aluminum ring (auxiliary centering ring 52) are preferably interference fit, the aluminum ring is assembled to the specific place of the axial bearing 5 through the heat mounting mode, and the inner diameter thereof should be less than the inner diameter of the axial bearing 5, and slightly greater than the outer diameter of the both sides of the thrust disc of the rotor 6; the inner circular surface of the aluminum ring can be only polished, or graphite coating, smearing lubricating oil and the like mode can be added to reduce the friction with the aluminum ring during the rotor assembly.

[0086] The utility model discloses the scheme adopts the guide rod assembly of hard metal core pole + multistage step nylon sleeve and the protection aluminum ring combined mode of the scheme, ensures that the rotor does not deviate from the central position when entering the shaft, can more smoothly complete rotor assembly, and the structure of the two different material parts of guide rod combination can guarantee that it does not bend for multiple uses, and also does not damage magnetic bearing and the like parts during the entry of the shaft, and the protection aluminum ring does not produce magnetic attraction force due to magnetic conduction when assisting the centering, and does not rub with the rotor hard, thereby damaging the rotor; the guide rod assembly and the protection aluminum ring are easy to process, and the processing cost is low.

[0087] The above only is the preferred embodiment of the utility model, and does not use to limit the utility model, and any modification, equivalent replacement and improvement etc. that are made within the spirit and principle of the utility model should be included in the protection scope of the utility model. The above only is the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled person in the prior art, on the premise that the technical principle of the utility model is not departed from, can make a number of improvements and variations, and these improvements and variations should be regarded as the protection scope of the utility model.

Claims

1. An assembly tool for a rotor of an electric machine, characterized by: The guide rod assembly (7) comprises a core rod (71) and a sleeve (70) sleeved on the outer periphery of the core rod (71), the hardness of the core rod (71) is greater than that of the sleeve (70), the guide rod assembly (7) is a rotary body structure, one end of the guide rod assembly (7) in the axial direction can be connected with the rotor (6), the other end of the guide rod assembly (7) in the axial direction is inserted into the shaft hole in the interior of the motor housing (1) to guide the traction of the rotor (6) into the shaft hole, and the shaft hole comprises a shaft hole of a stator and a shaft hole of a bearing.

2. The motor rotor assembly tooling of claim 1, wherein: the core rod (71) is made of a hard metal material, and the sleeve (70) is made of a deformable material, which is at least one of nylon, plastic and rubber.

3. The motor rotor assembly tooling of claim 1, wherein: the end of the guide rod assembly (7) in the axial direction connected with the rotor (6) is a connecting end, the end of the guide rod assembly (7) in the axial direction inserted into the interior of the motor housing (1) is an insertion end, and the outer diameter of the sleeve (70) relatively close to the insertion end is smaller than that of the sleeve (70) relatively close to the connecting end along the axial direction of the guide rod assembly (7).

4. The motor rotor assembly tooling of claim 3, wherein: there are at least two sleeves (70) along the axial direction of the guide rod assembly (7), and each of the at least two sleeves is sleeved on the outer periphery of the core rod (71); and / or the outer diameter of the sleeve (70) gradually increases from the insertion end to the connecting end along the axial direction of the guide rod assembly (7).

5. The motor rotor assembly tooling of claim 4, wherein: the sleeve (70) comprises a first sleeve (74), a second sleeve (73) and a third sleeve (72) along the axial direction of the guide rod assembly (7), the first sleeve (74) is the sleeve first inserted into the interior of the motor housing (1), the third sleeve (72) is the sleeve last inserted into the interior of the motor housing (1), the second sleeve (73) is connected between the first sleeve (74) and the third sleeve (72), the first sleeve (74), the second sleeve (73) and the third sleeve (72) are all cylindrical bodies, the outer diameter of the first sleeve (74) is smaller than that of the second sleeve (73), and the outer diameter of the second sleeve (73) is smaller than that of the third sleeve (72).

6. The motor rotor assembly tooling of claim 5, wherein: ​ The first sleeve (74) comprises a first cylinder (741) and a circular ring cylinder (742) connected to an axial end of the first cylinder (741), the inner diameter of the circular ring cylinder (742) is smaller than that of the first cylinder (741), so that the axial end face of the circular ring cylinder (742) towards the first cylinder (741) is in contact with the inner wall of the first cylinder (741) to form a stepped surface to limit the axial end of the core rod (71), and the circular ring cylinder (742) forms the insertion end of the guide rod assembly (7).

7. The motor rotor assembly tooling of claim 6, wherein: Further comprising a fastener (75), an inner periphery of the circular ring cylinder (742) forms a mounting hole (743), and the fastener (75) passes through the mounting hole (743) to be fixedly connected with an axial end of the core rod (71).

8. The motor rotor assembly tooling of claim 6, wherein: The second sleeve (73) comprises a second cylinder (731), and the third sleeve (72) comprises a third cylinder (721), an axial end of the second cylinder (731) is connected with the first cylinder (741), and an axial end of the third cylinder (721) is connected with the second cylinder (731).

9. The motor rotor assembly tooling of claim 3, wherein: The core rod (71) comprises a rotary body structure (711) and a protrusion (712), the rotary body structure (711) is inserted into the sleeve (70), the protrusion (712) is connected to an axial end of the rotary body structure (711) towards the rotor (6) and protrudes in the axial direction, the outer diameter of the protrusion (712) is smaller than that of the rotary body structure (711) at the joint, the protrusion (712) is located outside the sleeve (70) and can be inserted into the rotor (6) to form the connection end of the guide rod assembly (7).

10. The motor rotor assembly tooling of claim 3, wherein: The motor housing (1) is provided with a guide seat (4), the stator (2) and the bearing, the bearing comprises a radial bearing (3) and an axial bearing (5), along the axial direction, the guide seat (4), the radial bearing (3), the stator (2) and the axial bearing (5) are sequentially arranged, the guide rod assembly (7) is connected with the rotor (6) through the connection end, and the guide rod assembly (7) is inserted and assembled from the axial bearing (5) to the stator (2), the radial bearing (3) and the guide seat (4) in sequence through the insertion end.

11. The motor rotor assembly tooling of claim 10, wherein: The inner periphery of the axial bearing (5) is further provided with an auxiliary centering ring (52) to allow the rotor (6) to be inserted into the auxiliary centering ring (52), and an eye ring (8) is further connected to the axial end of the rotor (6) away from the guide rod assembly (7).

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