Motor mounting tool

Abstract

The utility model relates to motor production and manufacturing technical field, and disclose a kind of motor installation tool, including base and rotor positioning assembly, positioning frame is installed on base, for fixed motor shell;Rotor positioning assembly is set up in the both sides of positioning frame, including pull rod, connecting sleeve and mounting bracket, connecting sleeve is set up in the both sides of positioning frame, pull rod is threaded through mounting bracket to the inside of connecting sleeve;The coaxial positioning of motor shell and rotor is realized by the cooperation of positioning frame and rotor positioning assembly;The utility model is simple in structure, easy to operate, motor shell is fixed by positioning frame, rotor positioning assembly guarantees coaxial, second pull rod rotation push guarantee rotor accurate assembly, substantially improve motor assembly efficiency and quality.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, specifically to a motor installation fixture. Background Technology

[0002] Throughout the history of motor manufacturing, rotor installation has always been a critical process. In the early manual assembly mode, due to the motor's magnetic force and the small gap between the rotor and the housing, the rotor easily adhered to the stator cavity, making manual pushing difficult and prone to damaging the rotor, affecting subsequent processes and resulting in long assembly times, low production efficiency, and low quality. With the development of the motor industry, the requirements for assembly precision and efficiency have increased, highlighting the shortcomings of existing assembly methods: on the one hand, manual assembly is affected by factors such as operating force and angle, making it difficult to accurately control the rotor's installation position, easily leading to incomplete assembly and motor malfunctions; on the other hand, the high risk of rotor-housing collision damage increases product defect rates and maintenance costs, hindering the expansion of motor production scale and quality improvement. Innovative tooling is urgently needed to solve these problems. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a motor installation fixture, which has the advantages of simple structure, easy operation, and can improve the assembly efficiency and assembly quality of motors, thus solving the problem of low assembly efficiency of existing motor rotors.

[0004] To achieve the goals of simple structure, easy operation, and improved assembly efficiency and quality of motors, this utility model provides the following technical solution: a motor mounting fixture, including a base, on which a positioning frame is mounted for fixing the motor housing;

[0005] A rotor positioning assembly is disposed on both sides of a positioning frame, including a pull rod, a connecting sleeve, and a mounting bracket. The connecting sleeve is disposed on both sides of the positioning frame, and the pull rod passes through the mounting bracket into the connecting sleeve.

[0006] The coaxial positioning of the motor housing and the rotor is achieved through the cooperation of the positioning frame and the rotor positioning assembly.

[0007] Preferably, the pull rod is divided into a first pull rod and a second pull rod, and the outer surface of the second pull rod is provided with a first thread.

[0008] Preferably, the connecting sleeve includes a first internal thread connecting sleeve and a second internal thread connecting sleeve, wherein a screw is provided inside the second internal thread connecting sleeve.

[0009] Preferably, the mounting bracket includes a first rotor mounting bracket and a second rotor mounting bracket, wherein the second rotor mounting bracket is provided with a threaded hole.

[0010] Preferably, the base is also provided with at least one pair of mounting slots symmetrically arranged.

[0011] Preferably, the bottom of the base is provided with a shock-absorbing pad layer to absorb impact loads during the assembly process.

[0012] Preferably, the inner wall of the internal threaded connecting sleeve is provided with a copper bushing to reduce thread wear and improve connection strength.

[0013] Compared with the prior art, the present invention provides a motor mounting fixture, which has the following advantages:

[0014] 1. This motor installation fixture uses a positioning frame to fix the motor housing, a rotor positioning component to ensure coaxiality, and a second pull rod to rotate and push, overcoming the problem of incomplete assembly caused by magnetic adsorption and small gaps; the fixture assists the entire process, avoiding direct manual operation of the rotor, preventing rotor damage, and solving the drawbacks of manual assembly that easily damages the rotor and affects subsequent processes.

[0015] 2. The motor installation fixture has a simple structure and is easy to operate. Workers only need to operate the fixture according to the process, which reduces the uncertainty of manual intervention, reduces labor intensity, and ensures precise rotor assembly, thus greatly improving the efficiency and quality of motor assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0018] Figure 3 This is a schematic diagram of the second rotor mounting bracket structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the second tie rod structure of this utility model.

[0020] In the figure: 1. Base; 2. First rotor mounting bracket; 3. Second rotor mounting bracket; 31. Threaded hole; 4. First tie rod; 5. Second tie rod; 51. First thread; 6. First internal thread connecting sleeve; 7. Second internal thread connecting sleeve; 71. Screw; 8. Positioning bracket; 81. Mounting slot; 9. Motor housing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1As shown, a motor mounting fixture includes a base 1, on which a positioning bracket 8 is mounted for fixing a motor housing 9.

[0023] The rotor positioning assembly is located on both sides of the positioning frame 8, and includes a tie rod, a connecting sleeve, and a mounting bracket. The connecting sleeve is located on both sides of the positioning frame 8, and the tie rod passes through the mounting bracket into the connecting sleeve.

[0024] The positioning frame 8 and the rotor positioning assembly work together to achieve coaxial positioning of the motor housing 9 and the rotor; the base 1 serves as a basic support platform, providing a stable installation reference, and is usually designed with positioning grooves or positioning bosses to fix the motor housing 9; the positioning frame 8 achieves axial positioning of the stator assembly through the central positioning column. The center positioning column is divided into a threaded section and a positioning section. The positioning section mates with the axial center hole of the stator to ensure the positional accuracy of the stator after it is fixed. The tie rod passes through the mounting bracket and connects to the connecting sleeve at the end, achieving axial advancement of the rotor through threaded engagement. The axial threaded hole 31 on the mounting bracket mates with the threaded section of the tie rod, and the rotor is smoothly screwed into the stator receiving cavity through helical motion. The bushing through hole matches the outer diameter of the positioning section, further constraining the radial displacement of the rotor and ensuring coaxiality. The axial center hole of the positioning section mates with the helical assembly of the threaded section, utilizing the "threaded constraint radial wobble" characteristic to ensure that the rotor is stably screwed in along a predetermined path, avoiding collision with the stator core. The clearance fit between the bushing through hole and the positioning section eliminates assembly clearance and ensures that the rotor and stator axis coincide. Coaxiality deviation will cause rotor vibration and reduce motor efficiency. Shaft deviation increases contact stress and accelerates bearing and spindle wear. During high-speed rotation, poor coaxiality may cause equipment resonance, affecting safety. The helical assembly method replaces the traditional rapid drop installation, reducing the risk of rotor damage, and at the same time, the self-locking characteristic of the thread prevents the rotor from loosening during assembly.

[0025] like Figure 2As shown, the pull rod is divided into a first pull rod 4 and a second pull rod 5. The outer surface of the second pull rod 5 is provided with a first thread 51. The mounting bracket includes a first rotor mounting bracket 2 and a second rotor mounting bracket 3. The second rotor mounting bracket 3 is provided with a threaded hole 31, and the second pull rod 5 is threadedly connected to the second rotor bracket. The first thread 51 on the outer surface of the second pull rod 5 matches the threaded hole 31 on the second rotor mounting bracket 3. When the second pull rod 5 is rotated, according to the principle of screw transmission, the pull rod will be displaced along the axial direction. This design can accurately convert the rotational motion into the linear motion of the rotor, allowing the rotor to smoothly enter the motor housing 9 according to a predetermined path and speed, avoiding the risk of collision between the rotor and the stator core that may be caused by rapid drop installation, and ensuring the safety of the rotor installation process. Through precise control of the pitch and rotation angle of the threaded connection, the axial advance distance of the rotor can be precisely adjusted. The operator can precisely control the axial position of the rotor in the motor housing 9 according to the specific model of the motor and the assembly requirements, ensuring that the air gap between the rotor and the stator is uniform and meeting the performance requirements of the motor operation.

[0026] like Figure 2 As shown, the connecting sleeve includes a first internal thread connecting sleeve 6 and a second internal thread connecting sleeve 7. A screw 71 is provided inside the second internal thread connecting sleeve 7. The second internal thread connecting sleeve 7 is fixedly connected to the rotor by the screw 71, ensuring the precise coaxial positioning of the rotor and the motor housing 9, and improving the installation accuracy and operating performance of the motor.

[0027] like Figure 1 As shown, at least one pair of mounting slots 81 are symmetrically arranged on the base 1, allowing the positioning frame 8 to be installed in different mounting slots 81 according to the motor size. The symmetrical mounting slots 81 provide multiple positioning mounting points, enabling the positioning frame 8 to be flexibly adjusted in position according to the outer diameter or axial length of the motor housing 9. For example, small motors can have the positioning frame 8 installed in the inner mounting slot 81, while large motors can use the outer mounting slot 81, avoiding problems such as the motor housing 9 being suspended or over-positioned due to the fixed dimensions of the tooling. The modular design allows a single tooling to be adapted to motors of different power ratings (such as high-speed permanent magnet motors from 55KW to 560KW), significantly reducing tooling inventory costs for manufacturers. The symmetrical layout of the mounting slots 81 allows for fine-tuning of the positioning frame 8 in both the axial (along the motor axis) and radial (perpendicular to the axis) directions. For example, by adjusting the fixed position of the positioning frame 8 in the mounting slot 81, the axial offset of the motor housing 9 caused by casting tolerances can be compensated, ensuring the theoretical coaxiality of the rotor and stator.

[0028] Furthermore, in one embodiment of this utility model, a shock-absorbing pad is provided at the bottom of the base 1 to absorb impact loads during assembly. The shock-absorbing pad absorbs impact energy through the viscoelastic deformation of the material. Its stress-strain curve exhibits nonlinear characteristics, and it can absorb more than 80% of the impact kinetic energy at the moment of contact between the assembly tool and the fixture, avoiding deformation of the motor housing 9 or bending of the rotor shaft caused by rigid collision. The pad's interior adopts a honeycomb microstructure or metal spring inserts to form a multi-stage energy dissipation path. For example, the first-stage rubber layer absorbs high-frequency vibrations, and the secondary spring assembly attenuates low-frequency impacts, ensuring that the impact energy is fully dispersed before being transmitted to the motor body.

[0029] Furthermore, in one embodiment of this utility model, a copper bushing is provided on the inner wall of the internal threaded connecting sleeve to reduce thread wear and improve connection strength; the copper-based material forms an oxide film during friction, which has a self-lubricating effect and can prevent the threads from cold welding or seizing under high load. Under unlubricated assembly conditions, the copper bushing can still ensure the smooth operation of the threaded pair and avoid jamming or surface damage caused by insufficient lubrication.

[0030] Working Principle: The motor housing 9 is placed at the center of the base 1 and secured to the base 1 with bolts to ensure no displacement during subsequent assembly. Based on the length of the motor housing 9 and the rotor dimensions, the positions of the first rotor mounting bracket 2 and the second rotor mounting bracket 3 are determined at both ends of the motor housing 9. After placement, the bracket height is initially adjusted to the center position. The first internal threaded connecting sleeve 6 is fitted onto the first pull rod 4 and screwed into the appropriate position. The second internal threaded connecting sleeve 7 is fixed to the right side of the motor rotor with screws to ensure a stable connection. The first pull rod 4 is inserted into the first rotor mounting bracket 2, with one end extending from the right end of the motor housing 9. The second pull rod 5 is inserted into the second rotor mounting bracket 3, and its position is adjusted to match the first pull rod 4 and the subsequent assembly position of the rotor. The height adjustment mechanisms of the first rotor mounting bracket 2 and the second rotor mounting bracket 3 are adjusted. Using a dial indicator or laser alignment instrument, the coaxiality of the rotor and the motor housing 9 is checked, and the height is adjusted to ensure that the coaxiality error is within ±0.05mm. Inside, lock the bracket height adjustment mechanism; assemble the rotor between the first pull rod 4 and the second pull rod 5, connect it to the rotor through the internal threaded connecting sleeve, tighten the relevant connecting structure to make the rotor hold in place, ready to be pushed; slowly rotate the second pull rod 5, using the threaded transmission on the second pull rod 5 to drive the rotor to move towards the motor housing 9, during the pushing process, observe the cooperation between the rotor and the motor housing 9 in real time, control the rotation speed and thrust to ensure that the rotor enters the motor housing 9 smoothly and accurately until the rotor is assembled in place; after assembly, loosen the connection between the first pull rod 4 and the first rotor mounting bracket 2, and the second pull rod 5 and the second rotor mounting bracket 3, unscrew the first internal threaded connecting sleeve 6 and the second internal threaded connecting sleeve 7, remove the motor housing 9 from the base 1, take out the assembled motor, clean and inspect all parts of the tooling, and prepare for the next assembly.

[0031] In summary, this motor installation fixture, with its positioning frame 8 securing the motor housing 9, rotor positioning components ensuring coaxiality, and second pull rod 5 rotating and pushing, overcomes the assembly misalignment issues caused by magnetic adsorption and small gaps. The fixture assists the entire process, avoiding direct manual rotor operation, preventing rotor damage, and resolving the drawbacks of manual assembly that easily damages the rotor and affects subsequent processes. Its simple structure and easy operation reduce the uncertainty of manual intervention and lower labor intensity, while ensuring precise rotor assembly, significantly improving motor assembly efficiency and quality. Actual testing shows that assembly time is reduced by 30%-50% compared to manual assembly, and the rotor damage rate is reduced from approximately 15% to less than 1%. The internal threaded connecting sleeve is detachable and replaceable, and with the height-adjustable mounting bracket, it can adapt to different models and sizes of motor rotors and housings, expanding the fixture's applicability and reducing tooling procurement costs for enterprises due to the variety of motor models.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor mounting fixture, characterized in that: Includes a base, on which a positioning frame is mounted for fixing the motor housing; A rotor positioning assembly is disposed on both sides of a positioning frame, including a pull rod, a connecting sleeve, and a mounting bracket. The connecting sleeve is disposed on both sides of the positioning frame, and the pull rod passes through the mounting bracket into the connecting sleeve. The coaxial positioning of the motor housing and the rotor is achieved through the cooperation of the positioning frame and the rotor positioning assembly.

2. The motor mounting fixture according to claim 1, characterized in that: The pull rod is divided into a first pull rod and a second pull rod, and the outer surface of the second pull rod is provided with a first thread.

3. The motor mounting fixture according to claim 1, characterized in that: The connecting sleeve includes a first internal thread connecting sleeve and a second internal thread connecting sleeve, and a screw is provided inside the second internal thread connecting sleeve.

4. The motor mounting fixture according to claim 1, characterized in that: The mounting bracket includes a first rotor mounting bracket and a second rotor mounting bracket, wherein the second rotor mounting bracket is provided with a threaded hole.

5. The motor mounting fixture according to claim 1, characterized in that: The base is also symmetrically provided with at least one pair of mounting slots.

6. The motor mounting fixture according to claim 1, characterized in that: The base is equipped with a shock-absorbing pad layer at the bottom to absorb impact loads during the assembly process.

7. The motor mounting fixture according to claim 1, characterized in that: The inner wall of the internal threaded connecting sleeve is provided with a copper bushing to reduce thread wear and improve connection strength.

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