Disc type motor test tool

Abstract

A disc type motor testing tool disclosed by the present invention comprises a shell, a first end cover, a second end cover and a rotor shaft, the first end cover and the second end cover are installed at the two ends of the shell, the rotor shaft is rotatably connected with the first end cover and the second end cover through bearings, and the first end cover and the second end cover are provided with first adjusting assemblies. The axial position of the rotor shaft is adjusted through the first adjusting assembly; the rotor is installed on the rotor shaft through a second adjusting assembly, the axial position of the rotor is adjusted through the second adjusting assembly, an installation edge is arranged on the inner side of the shell in the radial direction in a protruding mode, and the stator and the installation edge are fixed. The testing tool is simple in structure, convenient to operate and suitable for testing of a single stator and a single rotor and testing of a single stator and double rotors, and the testing requirements of multiple types of disc type motors are met. By arranging two groups of adjusting assemblies, the axial position adjustment of the rotor during installation and testing is realized.

Description

Technical Field

[0001] This invention relates to the field of motor testing, and in particular to a disc motor testing fixture. Background Technology

[0002] In the field of motor R&D, customized development of motors based on the needs of different application scenarios has become the industry norm. From industrial drive motors to new energy vehicle drive motors, and then to motors for precision medical devices, different scenarios have significantly different requirements for motor performance indicators such as power density, efficiency, noise and vibration. This directly drives the need for targeted optimization of the core structural parameters of motors during the R&D process.

[0003] The air gap between the stator and rotor of a motor is one of the key parameters determining its performance. The size of the air gap directly affects the motor's magnetic reluctance, no-load current, iron loss, and output torque. Even a small deviation in the air gap can lead to a significant decrease in motor efficiency or excessive noise. Therefore, after completing software simulation during the motor design phase, performance must be verified through actual testing. Precise fine-tuning of the air gap during testing is a core step in ensuring that the motor performance reaches the optimal design value.

[0004] Traditional refrigeration compressor motors are housed within the compressor casing, lacking a separate housing. Therefore, a fixture is required for performance and factory testing after motor manufacturing. The structural characteristics of disc motors differ from radial flux motors. While the air gap in radial flux motors is ensured by stator and rotor molds, the air gap in disc motors is guaranteed by the positioning of the mechanical components used to mount the rotor and stator. This places higher demands on the machining precision of the structural components. Since it's impractical to create a separate testing fixture for every type of motor, an adjustable air gap testing device suitable for various diameters and structures was developed. Summary of the Invention

[0005] To address the shortcomings of the existing technology, the main objective of this invention is to overcome these deficiencies and disclose a disc motor testing fixture, comprising a housing, a first end cover, a second end cover, and a rotor shaft. The first and second end covers are mounted at opposite ends of the housing. The rotor shaft is rotatably connected to the first and second end covers via bearings. First adjustment components are provided on the first and second end covers to adjust the axial position of the rotor shaft. The rotor is mounted on the rotor shaft via a second adjustment component to adjust its axial position. A mounting edge protrudes radially from the inner side of the housing, and the stator is fixed to the mounting edge.

[0006] The second adjusting assembly includes an adjusting sleeve and two locking nuts. A guide portion is provided on the rotor shaft. The adjusting sleeve is axially slidably connected to the guide portion, and the adjusting sleeve and the guide portion are clearance-fitted. The locking nuts are respectively located at both ends of the adjusting sleeve. External threads extend from both ends of the guide portion. The locking nuts engage with the external threads and act on the ends of the adjusting sleeve. Rotating the locking nuts converts the rotational motion into axial motion, thereby pushing the adjusting sleeve to move axially. The rotor is mounted on the adjusting sleeve.

[0007] The rotor shaft has a radially recessed mounting groove on the guide portion, and a protruding key is provided in the mounting groove. The protruding key is detachably connected to the mounting groove. The adjusting sleeve has a cylindrical structure and an axially extending shaft hole that mates with the guide portion. An adjusting groove that mates with the protruding key is provided radially in the shaft hole. The adjusting groove mates with the protruding key to guide the adjusting sleeve to move axially.

[0008] The first end cover is provided with a first mounting hole for mounting the bearing, and a front bearing outer cover is provided outside the first mounting hole. The first adjustment component is provided on the front bearing outer cover and provides a driving force for the bearing to move toward the second end cover.

[0009] The second end cover is provided with a second mounting hole that mates with the bearing, and a rear bearing outer cover is radially protruding from the outer side of the second mounting hole. The first adjustment component is provided on the rear bearing outer cover to provide the bearing with a supporting force to the first end cover.

[0010] When the second adjusting component is adjusted, when the rotor is adjusted towards the first end cover, the locking nut on the first end cover side rotates and moves towards the first end cover side. The locking nut on the second end cover side rotates and pushes the adjusting sleeve to move the rotor towards the first end cover. After reaching the position, the locking nut on the first end cover side is rotated in the opposite direction to fix the adjusting sleeve through the locking nuts at both ends. When the rotor is adjusted towards the second end cover side, the locking nut on the second end cover side rotates and moves towards the second end cover side. The locking nut on the first end cover side rotates and pushes the adjusting sleeve to move the rotor towards the second end cover. After reaching the position, the locking nut on the second end cover side is rotated in the opposite direction to fix the adjusting sleeve through the locking nuts at both ends.

[0011] Furthermore, a bearing inner cover is provided on the inner side of the first end cover; the bearing inner cover is detachably fixed to the first end cover, the first end cover is provided with a plurality of screw holes, the bearing inner cover is provided with corresponding through holes, and the bearing inner cover is fixed to the first end cover by screws.

[0012] Furthermore, the first adjusting assembly includes a plurality of set screws, which are distributed around the rotor shaft on the first end cover and the second end cover, and the set screws act on the outer ring of the bearing;

[0013] When the air gap needs to be increased, the set screw on the outer cover of the front bearing rotates outward and the set screw on the outer cover of the rear bearing rotates inward, causing the entire rotor shaft to move forward axially, thereby increasing the air gap; when the air gap needs to be decreased, the set screw on the outer cover of the rear bearing rotates outward and the set screw on the outer cover of the front bearing rotates inward, causing the entire rotor shaft to move backward axially, thereby decreasing the air gap.

[0014] Furthermore, the first adjustment component includes a drive ring, which is threadedly connected to the first end cap and the second end cap, and the drive ring acts on the outer ring of the bearing;

[0015] The drive ring has a tubular structure and an external thread on its outer side. The first end cap and the second end cap are provided with internal threads that mate with the external thread of the drive ring. Rotating the drive ring converts the rotational motion into axial motion, thereby driving the bearing to move axially.

[0016] During adjustment, when the air gap needs to be increased, the drive ring on the outer cover of the front bearing rotates outward and the drive ring on the outer cover of the rear bearing rotates inward, causing the entire rotor shaft to move forward axially, thereby increasing the air gap; when the air gap needs to be decreased, the drive ring on the outer cover of the rear bearing rotates outward and the drive ring on the outer cover of the front bearing rotates inward, causing the entire rotor shaft to move backward axially, thereby decreasing the air gap.

[0017] Furthermore, the drive ring is also provided with a grip to facilitate the rotation of the drive ring by the operator.

[0018] Furthermore, a washer is provided on the rotor shaft. When the locking nut is adjusted to the correct position, the washer is used to lock the locking nut to the rotor shaft.

[0019] Furthermore, the washer has an annular structure, with a first fin on the inner ring and a second fin on the outer ring. A first anti-rotation groove is provided on the rotor shaft, and the first fin is bent and inserted into the first anti-rotation groove. The outer ring of the locking nut is provided with several second anti-rotation grooves. When the locking nut is adjusted to the correct position, the second fins are bent and inserted into the second anti-rotation grooves of the locking nut, so that the locking nut and the rotor shaft are connected and fixed through the washer.

[0020] Furthermore, the axial length of the first mounting hole is 0.5mm-1mm longer than the axial length of the bearing, so that the bearing has sufficient adjustment clearance.

[0021] Furthermore, the housing is provided with a ventilation opening, which includes an air inlet and an air outlet. Two air inlets are provided at the bottom of the housing, and one air outlet is provided at the top of the housing. Air enters from the air inlet, passes through the air gap, and flows out from the air outlet at the top.

[0022] The vent also serves as a window for detecting air gaps.

[0023] Furthermore, several screw holes are provided at intervals on both ends of the housing, and the first end cap and the second end cap are respectively fixed to both ends of the housing by bolts.

[0024] The beneficial effects achieved by this invention are as follows:

[0025] The testing fixture of this invention has a simple structure and is easy to operate. It is suitable for testing single-stator single-rotor and single-stator dual-rotor motors, meeting the testing requirements of various types of disc motors. By setting two sets of adjustment components, the axial position of the rotor can be adjusted during installation and testing. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a disc motor testing fixture according to the present invention;

[0027] Figure 2 for Figure 1 Internal structure diagram;

[0028] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0029] Figure 4 for Figure 3 Enlarged view of A in the middle;

[0030] Figure 5 for Figure 2 Enlarged view of B in the middle;

[0031] Figure 6 This is a schematic diagram of the rotor shaft structure;

[0032] Figure 7 A three-dimensional structural diagram of a test fixture for a disc motor using a drive ring adjustment assembly;

[0033] Figure 8 for Figure 7 Internal structure diagram;

[0034] Figure 9 This is a schematic diagram of the structure of the first adjustment component;

[0035] Figure 10 This is a schematic diagram of the assembly of a disc motor testing fixture for a single stator and dual rotor according to the present invention.

[0036] Figure 11 This is a schematic diagram of the three-dimensional structure of the shell;

[0037] Figure 12 This is a schematic diagram of the structure of the first end cap;

[0038] Figure 13 This is a schematic diagram of the second end cap.

[0039] Figure 14 This is a schematic diagram showing the interaction between the second adjustment component and the single rotor;

[0040] Figure 15 This is a schematic diagram of the rotor structure of a single-stator, single-rotor motor.

[0041] Figure 16 This is a schematic diagram of the stator structure of a single-stator, single-rotor motor.

[0042] Figure 17 This is a schematic diagram of the stator disk structure;

[0043] Figure 18 This is a schematic diagram of the structure of the first adapter plate;

[0044] Figure 19 This is a three-dimensional structural diagram of the dual rotors and rotor shaft;

[0045] Figure 20 This is a schematic diagram of the stator structure in a single-stator dual-rotor motor.

[0046] Figure 21 This is a schematic diagram of the second adapter plate.

[0047] Figure 22 This is a schematic diagram of the stator teeth structure;

[0048] Figure 23 This is a schematic diagram of the stator core structure;

[0049] Figure 24 This is a schematic diagram of the adjusting sleeve.

[0050] Figure 25 This is a schematic diagram showing the connection between the adjusting sleeve and the rotor;

[0051] Figure 26 This is a schematic diagram of the lock nut structure;

[0052] Figure 27 This is a schematic diagram of the washer structure;

[0053] The attached figures are labeled as follows:

[0054] 1. Housing; 2. First end cover; 3. Second end cover; 4. Rotor shaft; 5. Bearing; 6. First adjusting assembly; 7. Second adjusting assembly; 8. Rotor; 9. Stator; 11. Mounting edge; 12. Vent; 21. First mounting hole; 22. Front bearing outer cover; 23. Bearing inner cover; 31. Second mounting hole; 32. Rear bearing outer cover; 41. Guide part; 42. Protruding key; 43. Mounting groove; 44. Anti-rotation groove; 61. Set screw; 62. Drive ring; 63. Grip part; 71. Adjusting sleeve 711. Positioning part; 712. Fourth connecting hole; 72. Locking nut; 721. Second anti-rotation groove; 74. Washer; 81. Connecting part; 82. Back plate; 91. First adapter plate; 911. First connecting hole; 912. Second connecting hole; 92. Second adapter plate; 921. Stator support; 922. Third connecting hole; 923. Stator core; 924. Coil; 93. Stator plate; 931. Wire groove; 932. First screw hole; 121. Air inlet; 122. Air outlet. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0056] A disc motor testing fixture, such as Figures 1-5 As shown, the device includes a housing 1, a first end cover 2, a second end cover 3, and a rotor shaft 4. The first end cover 2 and the second end cover 3 are installed at both ends of the housing 1. The rotor shaft 4 is rotatably connected to the first end cover 2 and the second end cover 3 via bearings 5, which are mounted on the rotor shaft 4 via axial elastic retaining rings. Specifically, the bearings 5 ​​and rotor shaft 4 are interference-fitted, and the axial elastic retaining rings serve as axial limiting. The bearings 5 ​​between the first end cover 2 and rotor shaft 4, and between the second end cover 3 and rotor shaft 4, can be of the same or different models depending on actual requirements. A first adjustment component 6 is provided on the first end cover 2 and the second end cover 3 to adjust the axial position of the rotor shaft 4. The rotor 8 is mounted on the rotor shaft 4 via a second adjustment component 7 to adjust the axial position of the rotor 8. A mounting flange 11 is radially protruding from the inner side of the housing 1, and the stator 9 is fixed to the mounting flange 11.

[0057] In the above embodiments, such as Figures 1-5 As shown, the first end cap 2, the second end cap 3, and the housing 1 are fixed together by circumferential bolts.

[0058] In one specific embodiment, such as Figures 1-5As shown, several fixing holes are spaced apart on the mounting edge 11. Screws pass through these fixing holes and are fixed to the stator 9, thus fixing the stator 9 to the housing 1. Alternatively, depending on the size of the stator 9, it can be fixed to the housing 1 via an adapter plate. Specifically, as shown... Figures 16-18 The diagram shows the stator structure of a single-stator, single-rotor motor. The stator disk 93 has several slots 931 for winding the wire. A first adapter disk 91 has several first connecting holes 911 arranged around its perimeter, and corresponding first screw holes 932 are provided on the stator disk 93. Bolts are used to connect the first connecting holes 911 and the first screw holes 932 on the stator disk 93, thus fixing the stator disk to the first adapter disk 91. The first adapter disk 91 has second connecting holes 912 arranged along its outer perimeter, corresponding to the fixing holes on the mounting edge 11, so that the first adapter disk 91 is fixed to the mounting edge 11 with bolts. To increase the applicability of the first adapter disk 91, multiple concentric rings of first connecting holes 911 are arranged on the first adapter disk 91 to accommodate stator disks of different sizes.

[0059] like Figure 10 and Figure 20 The diagram shows the stator structure of a single-stator dual-rotor motor, comprising symmetrically arranged second transfer plates 92 connected by stator supports 921. To enhance the connection strength between the two second transfer plates 92, the stator supports 921 are respectively positioned on the inner and outer rings of the second transfer plates 92, and are circumferentially distributed. Several independent stator teeth are arranged circumferentially between the two second transfer plates 92. Each stator tooth includes a stator core 923 and a coil 924, with the coil 924 wound around the stator core 923, and both ends of the stator core 923 connected to the second transfer plates 92. A third connecting hole 922 is circumferentially provided on the second transfer plate 92, and the third connecting hole 922 is fixed to the mounting edge 11 by bolts, thereby fixing the stator 9 to the mounting edge 11.

[0060] In one embodiment, such as Figures 1-5 As shown, a first mounting hole 21 for mounting bearing 5 is provided on the first end cover 2, and a front bearing outer cover 22 is provided on the outside of the first mounting hole 21. A first adjusting component 6 is provided on the front bearing outer cover 22, and the first adjusting component 6 provides a driving force for the bearing 5 to move toward the second end cover 3.

[0061] In the above embodiments, such as Figures 1-5 As shown, a bearing inner cover 23 is also provided inside the first mounting hole 21. Specifically, the bearing inner cover 23 is detachably connected to the first end cover 2. In this embodiment, the bearing inner cover 23 and the first end cover 2 are fixed by screws.

[0062] In one embodiment, such as Figures 1-5As shown, the second end cover 3 is provided with a second mounting hole 31 that mates with the bearing 5, and a rear bearing outer cover 32 protrudes radially from the outer side of the second mounting hole 31. A first adjusting component 6 is provided on the rear bearing outer cover 32, and the first adjusting component 6 provides a supporting force to the bearing 5 on the second end cover 3 towards the first end cover 2.

[0063] In the above embodiments, such as Figures 1-5 As shown, the first adjusting component 6 on the first end cover 2 and the second end cover 3 applies opposing driving forces to the bearings 5 ​​on the first end cover 2 and the second end cover 3 to limit the axial position of the rotor shaft 4 in order to adjust the air gap between the stator 9 and the rotor 8.

[0064] In one specific embodiment, such as Figures 1-5 As shown, the first adjustment assembly 6 includes several set screws 61. Several through-hole screws that mate with the set screws 61 are arranged around the front bearing outer cover 22 and the rear bearing outer cover 32. The set screws 61 act on the outer ring of the bearing 5, and rotating the set screws 61 drives the bearing 5 to move axially. The set screws are bolts, including but not limited to hexagonal socket head cap screws and hexagonal head cap screws. During air gap adjustment, when the air gap needs to be increased, the set screws 61 on the front bearing outer cover 22 rotate outwards, and the set screws 61 on the rear bearing outer cover 32 rotate inwards, causing the entire rotor shaft 4 to move axially forward, thus increasing the air gap. When the air gap needs to be decreased, the set screws 61 on the rear bearing outer cover 32 rotate outwards, and the set screws 61 on the front bearing outer cover 22 rotate inwards, causing the entire rotor shaft 4 to move axially backwards, thus decreasing the air gap. The distance between the front bearing outer cover 22 and the bearing inner cover 23 is 0.5-1 mm larger than the axial width of the bearing 5, ensuring sufficient clearance for axial adjustment. Alternatively, one end of the first end cover 2 may not have a bearing inner cover 23, making it an open structure. In addition, the rear bearing outer cover 32 and the second end cover 3 may be an integral structure; or the rear bearing outer cover 32 and the second end cover 3 may be separate structures, with the rear bearing outer cover 32 fixed to the second end cover 3 by circumferential bolts.

[0065] In another specific embodiment, such as Figure 7 , Figure 8 , Figure 9 , Figure 12 , Figure 13 As shown, the first adjusting component 6 includes two drive rings 62, which are threadedly connected to the first end cap 2 and the second end cap 3, respectively. The drive rings 62 act on the outer ring of the bearing 5. Specifically, the drive ring 62 is a tubular structure with external threads on its outer side and internal threads that mate with it on the inner wall of the front bearing outer cover 22. Rotating the drive ring 62 allows for axial movement, thereby pushing the bearing 5 to move within the mounting hole. In this embodiment, as... Figure 12As shown, the front bearing outer cover 22 and the first end cover 2 are an integral structure, and the hollow interior of the front bearing outer cover 22 is provided with an internal thread that mates with the drive ring 62. Figure 13 As shown, the second end cover 3 has an adjustment cavity for mounting the bearing in the middle. The adjustment cavity is axially through and the outer end of the adjustment cavity is provided with an internal thread that cooperates with the drive ring 62. The bearing is pushed to move axially in the adjustment cavity by rotating the drive ring 62.

[0066] In the above embodiments, such as Figure 9 As shown, the drive ring 62 is also provided with a gripping part 63 to facilitate the operator's rotation of the drive ring 62. The cross-section of the gripping part 63 includes, but is not limited to, a circle or a polygon, in order to increase the working surface of the tool.

[0067] In one embodiment, it is suitable for testing single-stator, single-rotor motors, such as... Figures 14-18 As shown, the rotor 8 includes a connecting part 81, a rotor back plate 82, and a magnet 83. The connecting part 81 and the rotor back plate 82 are integrally formed, and the magnet 83 is disposed on the rotor back plate 82. The second adjusting assembly 7 includes two locking nuts 72. A guide part 41 is provided on the rotor shaft 4, and the rotor 8 is disposed on the rotor shaft 4. The connecting part 81 and the guide part 41 are clearance-fitted, and the connecting part 81 and the guide part 41 are connected by a key, so that the rotor shaft 4 drives the rotor 8 to rotate synchronously. The connecting part 81 and the guide part 41 are axially slidably connected. The locking nuts 72 are disposed at both ends of the connecting part 81 and are threadedly connected to the rotor shaft 4. The locking nuts 72 act on the ends of the connecting part 81 to adjust the position of the rotor on the shaft according to the design value.

[0068] In another embodiment, such as Figures 19-25As shown, this is suitable for testing single-stator dual-rotor motors. The second adjustment assembly 7 includes an adjustment sleeve 71 and two locking nuts 72. A guide portion 41 is provided on the rotor shaft 4. The adjustment sleeve 71 is axially slidably connected to the guide portion 41, and the adjustment sleeve 71 and the guide portion 41 are connected by a key, so that the rotor shaft 4 drives the rotor to rotate synchronously. The locking nuts 72 are located at both ends of the adjustment sleeve 71 and are threadedly connected to the rotor shaft 4. The locking nuts 72 act on the ends of the adjustment sleeve 71, and the rotor 8 is installed at both ends of the adjustment sleeve 71. The adjustment sleeve 71 is fixed to the rotor disc, and the position of the rotor on the shaft is adjusted according to the design value. Specifically, the adjustment sleeve 71 has a cylindrical structure, with an axially extending shaft hole that mates with the guide portion 41, and a keyway. The shaft hole and the guide portion 41 are clearance-fitted, and the keyway and the key are clearance-fitted, so that the adjustment sleeve 71 can move smoothly axially. The adjusting sleeve 71 has protruding positioning portions 711 on both ends of the second adapter plate 92, and the positioning portions 711 and the adjusting sleeve 71 have a stepped structure. A fourth connecting hole 712 is provided on the end face of the adjusting sleeve 71, and a fifth connecting hole corresponding to the fourth connecting hole 712 is provided on the back plate of the rotor 8. The fourth connecting hole 712 is a screw hole, and the fourth connecting hole 712 and the fifth connecting hole are connected by bolts to fasten the back plate and the adjusting sleeve 71. The distance between the two end faces of the adjusting sleeve 71 is determined according to the setting of the two rotors 8. After the rotors 8 and the adjusting sleeve 71 are installed, the distance between the two rotors 8 remains unchanged.

[0069] When the second adjustment component 7 is in use, such as Figures 19-25 As shown, move the locking nut 72 on the side that needs to be adjusted away from the adjusting sleeve 71, and then rotate the locking nut 72 on the other end to push the adjusting sleeve 71 to move axially. After the adjustment is completed, tighten the locking nut 72 on that side, and then fix the adjusting sleeve 71 by the locking nuts 72 on both sides.

[0070] In the above embodiments, such as Figures 1-5 and Figure 14 As shown, a washer 74 is installed on the rotor shaft 4, located between the locking nut 72 and the rotor 8. The locking nut 72, through contact with the connecting part 81 via the washer 74, converts the sliding friction between them into low-resistance friction on the washer contact surface, significantly reducing the resistance when rotating the locking nut. The washer 74 avoids surface wear caused by direct friction between metal parts, while also improving the efficiency of converting preload torque into axial thrust, making the axial movement of the adjusting sleeve smoother and more precise. After the locking nut 72 is adjusted to the correct position, the washer 74 locks the locking nut 72 to the rotor shaft 4. The washer 74 can be a composite material; the composite material uses a PTFE-coated metal washer.

[0071] In the above embodiments, such as Figure 14 , Figure 26 , Figure 27As shown, the washer 74 has an annular structure, with a first fin 741 on the inner ring and a second fin 742 on the outer ring. The number of second fins 742 is not limited. The first fin 741 is connected to the rotor shaft 4. When the locking nut 72 is adjusted to the correct position, the second fin 742 is connected to the locking nut 72, and the washer 74 prevents the locking nut 72 from rotating.

[0072] Specifically, such as Figure 6 , Figure 14 , Figure 26 and Figure 27 As shown, a first anti-rotation groove 44 is provided on the rotor shaft 4. The first fin 741 is bent and inserted into the first anti-rotation groove 44, thus connecting the washer 74 to the rotor shaft 4. Several second anti-rotation grooves 721 are spaced apart on the side wall of the locking nut 72. After the locking nut 72 is adjusted to the correct position, the second fins 742 and second anti-rotation grooves 721 are selected and aligned, and the second fins 742 are bent and inserted into the second anti-rotation grooves 721. The washer 74 then connects the locking nut 72 and the rotor shaft 4, achieving the effect of loosening the locking mechanism.

[0073] In the above embodiments, such as Figures 1-6 As shown, a key 42 is provided on the rotor shaft 4, and an adjustment groove that mates with the key 42 is provided circumferentially on the inner wall of the connecting part 81. The axial adjustment of the adjusting sleeve 71 and the rotor shaft 4 is achieved through the engagement of the key 42 and the adjustment groove. The key 42 is a detachable structure, meaning that a mounting groove 43 that mates with the key 42 is provided on the rotor shaft 4.

[0074] In one embodiment, such as Figures 1-5 and Figure 11 As shown, a vent 12 is provided on the housing 1. The vent 12 serves to dissipate heat during testing and also to measure the air gap between the rotor 8 and the stator 9 using tools. Specifically, the vent 12 includes an air inlet 121 and an air outlet 122. Two air inlets 121 are provided at the bottom of the housing 1, and one air outlet 122 is provided at the top. Air enters from the air inlets 121, passes through the air gap, and flows out from the air outlet 122 at the top.

[0075] In the above embodiments, the design value refers to the distance between the magnet surface of the rotor facing the air gap and the positioning step on the rotor shaft.

[0076] The following describes the installation and debugging process for testing a single-stator, single-rotor disc motor, such as... Figure 2 , Figure 3 , Figure 4As shown, the first adjusting assembly 6 uses set screw 61 to fix the rotor 8 and stator 9 to the connecting part 81 and the mounting edge 11 respectively. The locking washer 74 serves to prevent loosening. The air gap between the stator 9 and rotor 8 is adjusted by adjusting the axial position of the connecting part 81. This part is based on the design values ​​in the drawings. To allow different motors to use the same testing fixture, the adjustment positions of the two locking nuts before and after the connecting part 81 are given during the design phase based on the stator and rotor thicknesses, ensuring that the relative positional relationship between the rotor 8 and stator 9 conforms to the design values. The second adjusting assembly 7, according to the design values, installs and fixes the rotor 8 onto the rotor shaft 4. Specifically, when the air gap needs to be increased, the locking nut 72 on the first end cover 2 side rotates and moves towards the first end cover 2 side, while the locking nut 72 on the second end cover 3 side rotates and pushes the connecting part 81, causing the rotor to move towards the first end cover 2. After reaching the desired position, the locking nut 72 on the first end cover 2 side is rotated in the opposite direction to fix the connecting part 81 using the locking nuts 72 at both ends. When the air gap needs to be reduced, the locking nut 72 on the second end cover 3 side rotates and moves towards the second end cover 3 side. The locking nut 72 on the first end cover 2 side rotates and pushes the connecting part 81, causing the rotor to move towards the second end cover 3. After reaching the position, the locking nut 72 on the second end cover 3 side rotates in the opposite direction to fix the connecting part 81 with the locking nuts 72 at both ends. After completion, the connecting part 81 is locked and fixed with the locking nuts 72. Then, the rotor shaft 4 is installed with the first end cover 2 and the second end cover 3. Both the first end cover 2 and the second end cover 3 are fixed to the housing 1. The air gap is measured through the ventilation holes. Based on the measurement results, the axial position of the rotor shaft 4 is adjusted by adjusting the set screws 61 on the first end cover 2 and the second end cover 3, thereby readjusting the air gap between the rotor 8 and the stator 9 to achieve the required air gap value. Specifically, when the air gap needs to be increased, the set screw 61 on the front bearing outer cover 22 rotates outward, and the set screw 61 on the rear bearing outer cover 32 rotates inward, causing the entire rotor shaft 4 to move forward axially, thus increasing the air gap. When the air gap needs to be decreased, the set screw 61 on the rear bearing outer cover 32 rotates outward, and the set screw 61 on the front bearing outer cover 22 rotates inward, causing the entire rotor shaft 4 to move backward axially, thus decreasing the air gap.

[0077] The following describes the installation and debugging process of a single stator and single rotor test fixture using a disc motor with a drive ring 62. Figure 8 and Figures 14-18As shown, the first adjusting component 6 uses a drive ring 62, and the rotor 8 is installed and fixed on the rotor shaft 4 according to the design values ​​through the second adjusting component 7. The rotor 8 and stator 9 are fixed to the connecting part 81 and the mounting edge 11 respectively. The air gap between the stator 9 and the rotor 8 is adjusted by adjusting the axial position of the connecting part 81. This part is based on the design values ​​in the drawings. In order to use the same test fixture for different motors, the adjustment positions of the two locking nuts before and after the connecting part 81 are given according to the thickness of the stator and rotor during the design stage, so that the relative positional relationship between the rotor 8 and the stator 9 conforms to the design values. Specifically, when the air gap needs to be increased, the locking nut 72 on the side of the first end cover 2 rotates and moves towards the side of the first end cover 2, and the locking nut 72 on the side of the second end cover 3 rotates and pushes the connecting part 81 to drive the rotor to move towards the direction of the first end cover 2. After it is in place, the locking nut 72 on the side of the first end cover 2 is rotated in the opposite direction to fix the connecting part 81 through the locking nuts 72 at both ends. When the air gap needs to be reduced, the locking nut 72 on the second end cover 3 side rotates and moves towards the second end cover 3 side, while the locking nut 72 on the first end cover 2 side rotates and pushes the connecting part 81 to move the rotor towards the second end cover 3. After reaching the position, the locking nut 72 on the second end cover 3 side rotates in the opposite direction to fix the connecting part 81 with the locking nuts 72 at both ends. After completion, the connecting part 81 is locked and fixed with the locking nuts 72. Then, the rotor shaft 4 is installed with the first end cover 2 and the second end cover 3. Both the first end cover 2 and the second end cover 3 are fixed to the housing 1. The air gap is measured through the ventilation holes. Based on the measurement results, the axial position of the rotor shaft 4 is adjusted by adjusting the drive rings 62 on the first end cover 2 and the second end cover 3, thereby readjusting the air gap between the rotor 8 and the stator 9. Specifically, when the air gap needs to be increased, the drive ring 62 on the front bearing outer cover 22 rotates outward, and the drive ring 62 on the rear bearing outer cover 32 rotates inward, causing the entire rotor shaft 4 to move forward axially, thereby increasing the air gap. When the air gap needs to be reduced, the drive ring 62 on the rear bearing outer cover 32 rotates outward, and the drive ring 62 on the front bearing outer cover 22 rotates inward, causing the entire rotor shaft 4 to move axially backward, thereby reducing the air gap.

[0078] The following describes the installation and debugging process during single-stator dual-rotor testing, such as... Figure 10 and Figures 19-25As shown, the first adjusting component 6 uses a drive ring 62, and the second adjusting component 7, according to the design values, mounts and fixes the rotor 8 onto the rotor shaft 4. Since there are two rotors 8, they are mounted on the adjusting sleeve 71. The distance between the two rotors 8 is determined by the adjusting sleeve 71, and the stator 9 is placed between the two rotors 8. The air gap between the two rotors 8 and the stator 9 is adjusted by the second adjusting component 7. This part is based on the design values ​​in the drawings. To allow different motors to use the same testing fixture, during the design phase, the adjustment positions of the two locking nuts before and after the adjusting sleeve 71 are given according to the thickness of the stator and rotor, so that the relative positional relationship between the rotor 8 and the stator 9 conforms to the design values. Specifically, when the air gap on the first end cover 2 side needs to be increased and the air gap on the second end cover 3 side needs to be decreased, the locking nut 72 on the first end cover 2 side rotates and moves towards the first end cover 2 side. The locking nut 72 on the second end cover 3 side rotates and pushes the adjusting sleeve 71, causing the rotor to move towards the first end cover 2. After reaching the desired position, the locking nut 72 on the first end cover 2 side rotates in the opposite direction to fix the adjusting sleeve 71 using the locking nuts 72 at both ends. When the air gap on the first end cover 2 side needs to be decreased and the air gap on the second end cover 3 side needs to be increased, the locking nut 72 on the second end cover 3 side rotates and moves towards the second end cover 3 side. The locking nut 72 on the first end cover 2 side rotates and pushes the adjusting sleeve 71, causing the rotor to move towards the second end cover 3. After reaching the desired position, the locking nut 72 on the second end cover 3 side rotates in the opposite direction to fix the adjusting sleeve 71 using the locking nuts 72 at both ends. The motor is then tested. The distance between the two rotors and the distance between the two surfaces of the adjusting sleeve 71 are given according to the design value. Based on the measured air gap data, the axial position of the rotor shaft 4 is adjusted by the drive ring 62, thereby adjusting the two air gaps. Specifically, when the air gap on the first end cover side needs to be increased, the set screw 61 on the front bearing outer cover 22 rotates outward, and the drive ring 62 on the rear bearing outer cover 32 rotates inward, causing the entire rotor shaft 4 to move axially forward, thus increasing the air gap on the first end cover 2 side and decreasing the air gap on the second end cover 3 side. When the air gap needs to be decreased, the drive ring 62 on the rear bearing outer cover 32 rotates outward, and the drive ring 62 on the front bearing outer cover 22 rotates inward, causing the entire rotor shaft 4 to move axially backward, thus increasing the air gap on the second end cover 3 side and decreasing the air gap on the first end cover 2 side.

[0079] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications or equivalent substitutions made to the present invention without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present invention.

Claims

1. A testing fixture for a disc motor, characterized in that, The device includes a housing, a first end cover, a second end cover, and a rotor shaft. The first end cover and the second end cover are installed at both ends of the housing. The rotor shaft is rotatably connected to the first end cover and the second end cover respectively via bearings. The first end cover and the second end cover are provided with a first adjustment component, which is used to adjust the axial position of the rotor shaft. The rotor is mounted on the rotor shaft via a second adjustment assembly, and the axial position of the rotor is adjusted using the second adjustment assembly. A mounting edge is radially protruding from the inner side of the housing, and the stator is fixed to the mounting edge. The second adjusting assembly includes an adjusting sleeve and two locking nuts. A guide portion is provided on the rotor shaft. The adjusting sleeve is axially slidably connected to the guide portion, and the adjusting sleeve and the guide portion are clearance-fitted. The locking nuts are respectively located at both ends of the adjusting sleeve. External threads extend from both ends of the guide portion. The locking nuts engage with the external threads and act on the ends of the adjusting sleeve. Rotating the locking nuts converts the rotational motion into axial motion, thereby pushing the adjusting sleeve to move axially. The rotor is mounted on the adjusting sleeve. The rotor shaft has a radially recessed mounting groove on the guide portion, and a protruding key is provided in the mounting groove. The protruding key is detachably connected to the mounting groove. The adjusting sleeve has a cylindrical structure and an axially extending shaft hole that mates with the guide portion. An adjusting groove that mates with the protruding key is provided radially in the shaft hole. The adjusting groove mates with the protruding key to guide the adjusting sleeve to move axially. The first end cover is provided with a first mounting hole for mounting the bearing, and a front bearing outer cover is provided outside the first mounting hole. The first adjustment component is provided on the front bearing outer cover and provides a driving force for the bearing to move toward the second end cover. The second end cover is provided with a second mounting hole that mates with the bearing, and a rear bearing outer cover is radially protruding from the outer side of the second mounting hole. The first adjustment component is provided on the rear bearing outer cover to provide the bearing with a supporting force to the first end cover. When the second adjusting component is adjusted, when the rotor is adjusted towards the first end cover, the locking nut on the first end cover side rotates and moves towards the first end cover side. The locking nut on the second end cover side rotates and pushes the adjusting sleeve to move the rotor towards the first end cover. After reaching the position, the locking nut on the first end cover side is rotated in the opposite direction to fix the adjusting sleeve through the locking nuts at both ends. When the rotor is adjusted towards the second end cover side, the locking nut on the second end cover side rotates and moves towards the second end cover side. The locking nut on the first end cover side rotates and pushes the adjusting sleeve to move the rotor towards the second end cover. After reaching the position, the locking nut on the second end cover side is rotated in the opposite direction to fix the adjusting sleeve through the locking nuts at both ends.

2. The disc motor testing fixture according to claim 1, characterized in that, A bearing inner cover is provided on the inner side of the first end cover; the bearing inner cover is detachably fixed to the first end cover, the first end cover is provided with a plurality of screw holes, the bearing inner cover is provided with corresponding through holes, and the bearing inner cover is fixed to the first end cover by screws.

3. The disc motor testing fixture according to claim 1, characterized in that, The first adjustment assembly includes a plurality of set screws, which are distributed around the rotor shaft on the first end cover and the second end cover, and the set screws act on the outer ring of the bearing; When the air gap needs to be increased, the set screw on the outer cover of the front bearing rotates outward and the set screw on the outer cover of the rear bearing rotates inward, causing the entire rotor shaft to move forward axially, thereby increasing the air gap; when the air gap needs to be decreased, the set screw on the outer cover of the rear bearing rotates outward and the set screw on the outer cover of the front bearing rotates inward, causing the entire rotor shaft to move backward axially, thereby decreasing the air gap.

4. The disc motor testing fixture according to claim 1, characterized in that, The first adjustment component includes a drive ring, which is threadedly connected to a first end cap and a second end cap, and the drive ring acts on the outer ring of the bearing; The drive ring has a tubular structure and an external thread on its outer side. The first end cap and the second end cap are provided with internal threads that mate with the external thread of the drive ring. Rotating the drive ring converts the rotational motion into axial motion, thereby driving the bearing to move axially. During adjustment, when the air gap needs to be increased, the drive ring on the outer cover of the front bearing rotates outward and the drive ring on the outer cover of the rear bearing rotates inward, causing the entire rotor shaft to move forward axially, thereby increasing the air gap; when the air gap needs to be decreased, the drive ring on the outer cover of the rear bearing rotates outward and the drive ring on the outer cover of the front bearing rotates inward, causing the entire rotor shaft to move backward axially, thereby decreasing the air gap.

5. The disc motor testing fixture according to claim 4, characterized in that, The drive ring is also provided with a grip to facilitate the rotation of the drive ring by the operator.

6. The disc motor testing fixture according to claim 1, characterized in that, A washer is provided on the rotor shaft. When the locking nut is adjusted to the correct position, the washer is used to lock the locking nut to the rotor shaft.

7. The disc motor testing fixture according to claim 6, characterized in that, The washer has an annular structure, with a first fin on the inner ring and a second fin on the outer ring. The rotor shaft has a first anti-rotation groove, and the first fin is bent and inserted into the first anti-rotation groove. The outer ring of the locking nut has several second anti-rotation grooves. When the locking nut is adjusted to the correct position, the second fins are bent and inserted into the second anti-rotation grooves of the locking nut, so that the locking nut and the rotor shaft are connected and fixed through the washer.

8. The disc motor testing fixture according to claim 1, characterized in that, The axial length of the first mounting hole is 0.5mm-1mm longer than the axial length of the bearing, so that the bearing has sufficient adjustment clearance.

9. A disc motor testing fixture according to claim 1, characterized in that, The housing is provided with a ventilation opening, which includes an air inlet and an air outlet. Two air inlets are provided at the bottom of the housing, and one air outlet is provided at the top of the housing. Air enters from the air inlet, passes through the air gap, and flows out from the air outlet at the top. The vent also serves as a window for detecting air gaps.

10. A disc motor testing fixture according to claim 1, characterized in that, The two end faces of the housing are provided with a plurality of screw holes spaced apart, and the first end cap and the second end cap are respectively fixed to the two ends of the housing by bolts.

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