A shaft hole assembly device for a rotor assembly

Abstract

The present invention discloses a shaft hole assembly device for a rotor assembly, which includes a support mechanism, a positioning mechanism provided on the support mechanism, and a heating mechanism provided in the positioning mechanism; the heating mechanism includes a fixing plate provided in the positioning mechanism, a heating element provided on the fixing plate, and a heating controller electrically connected to the heating element; the rotor end cover plate is sleeved on the heating element, the steel shaft is provided on the positioning mechanism, the steel shaft is aligned with the heating element, the heating controller heats the heating element, and the positioning mechanism drives the steel shaft to move towards the heating element until the steel shaft pushes open the heating element and penetrates into the rotor end cover plate. By sleeving the rotor end cover plate on the heating element, controlling the heating through the heating controller, and utilizing the principle of thermal expansion and contraction, the diameter of the central hole of the rotor end cover plate becomes larger. At this time, the positioning mechanism is used to drive the steel shaft to move, push open the heating element, and penetrate into the rotor end cover plate. When the rotor end cover plate cools down, the assembly of the steel shaft and the rotor end cover plate is completed.

Description

Technical Field

[0001] The present invention relates to the field of motor assembly, and particularly to a shaft hole assembly device for a rotor assembly. Background Art

[0002] In a motor, the rotor of a brushless motor usually includes a gear member and a magnet core. A perforation for a steel shaft to pass through is provided in the center of the gear member, and the steel shaft is fixedly connected to the stator to achieve the smooth rotation of the gear member. The assembly quality of the steel shaft of the rotor assembly and the rotor end cover plate directly affects the performance and reliability of the motor.

[0003] Currently, after confirming that the components are clean and complete in the rotor assembly, the rotor end cover plate is accurately placed at a predetermined position through a positioning tooling or positioning holes, ensuring that its assembly position with the steel shaft is accurate. Then, the rotor end cover plate is slowly pressed along the steel shaft by a press until the steel shaft passes through the rotor end cover plate.

[0004] However, in the above pressing method, if the dimensional accuracy of the center hole of the rotor end cover plate fails to meet the standard, during the pressing process, the center hole or the steel shaft is prone to component damage due to hard pressing, thereby affecting the pressing effect. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a shaft hole assembly device for a rotor assembly, aiming to solve the problem that in the current pressing method, if the dimensional accuracy of the center hole of the rotor end cover plate fails to meet the standard, during the pressing process, the center hole or the steel shaft is prone to component damage due to hard pressing, thereby affecting the pressing effect.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions: A shaft hole assembly device for a rotor assembly, the shaft hole assembly device for the rotor assembly includes a support mechanism, a positioning mechanism provided on the support mechanism, and a heating mechanism provided in the positioning mechanism;

[0007] The heating mechanism includes a fixing plate provided in the positioning mechanism, a heating element provided on the fixing plate, and a heating controller electrically connected to the heating element;

[0008] Wherein, the rotor end cover plate is sleeved on the heating element, the steel shaft is provided on the positioning mechanism, the steel shaft is aligned with the heating element, the heating controller heats the heating element, and the positioning mechanism drives the steel shaft to move towards the heating element until the steel shaft pushes open the heating element and passes through the rotor end cover plate.

[0009] In summary, according to the shaft hole assembly device of the rotor assembly provided by the present invention, by sleeving the rotor end cover plate on the heating element, controlling the heating element to heat through the heating controller, and utilizing the principle of thermal expansion and contraction, the aperture of the central hole of the rotor end cover plate becomes larger. At this time, the positioning mechanism drives the steel shaft to move, pushes open the heating element, and penetrates into the rotor end cover plate. When the rotor end cover plate cools down, the assembly of the steel shaft and the rotor end cover plate is completed. Specifically, the heating mechanism includes a fixing plate provided in the positioning mechanism, a heating element provided on the fixing plate, and a heating controller electrically connected to the heating element; the rotor end cover plate is sleeved on the heating element, the steel shaft is provided on the positioning mechanism, the steel shaft is aligned with the heating element, the heating controller heats the heating element, and the positioning mechanism drives the steel shaft to move towards the heating element until the steel shaft pushes open the heating element and penetrates into the rotor end cover plate. The present invention replaces the traditional hard pressing method, utilizes the principle of thermal expansion and contraction, reduces the possibility of damage to the steel shaft and the rotor end cover plate, realizes non-destructive, high concentricity, and high firmness assembly, solves the swing caused by the excessive length of the outer-rotor motor rotor, and makes its operation more stable.

[0010] According to one aspect of the above technical solution, the support mechanism includes a bottom plate, a first support assembly and a second support assembly provided on the bottom plate and used for supporting the positioning mechanism.

[0011] According to one aspect of the above technical solution, the first support assembly includes a first support column and a second support column vertically provided at both ends of the bottom plate, the first support column and the second support column are parallel to each other and have the same height.

[0012] According to one aspect of the above technical solution, a transmission bar for the movement of the positioning mechanism is further provided on one side of the second support column away from the first support column.

[0013] According to one aspect of the above technical solution, the second support assembly includes at least two third support columns vertically provided on the bottom plate, and one end of the third support column away from the bottom plate is provided in the fixing plate.

[0014] According to one aspect of the above technical solution, an elastic member is further sleeved on the circumferential surface of the third support column, and both ends of the elastic member respectively abut against the end faces of the fixing plate and the bottom plate.

[0015] According to one aspect of the above technical solution, the positioning mechanism includes a first positioning component movably connected to the first support column and the second support column, and a second positioning component fixedly connected to the bottom plate, and the steel shaft is provided on the first positioning component and is aligned with the center of the second positioning component.

[0016] According to one aspect of the above technical solution, the first positioning component includes a positioning plate and a positioning sleeve provided on the positioning plate, and the positioning sleeve is aligned with the center of the second positioning component.

[0017] According to one aspect of the above technical solution, an adjusting member is further provided at one end of the positioning plate, and the adjusting member is engaged with the transmission bar.

[0018] According to one aspect of the above technical solution, the second positioning assembly includes a positioning cylinder and a mounting edge provided on the positioning cylinder. A receiving groove is provided in the positioning cylinder, and the fixing plate and the heating member are provided in the receiving groove, and the heating member penetrates through the positioning cylinder for passing through the rotor end cover plate.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0020] Figure 1 Structural schematic diagram of the shaft hole assembly device of the rotor assembly in an embodiment of the present invention;

[0021] Figure 2 Structural schematic diagram of the bottom plate in an embodiment of the present invention;

[0022] Figure 3 Structural schematic diagram of the second positioning assembly in an embodiment of the present invention;

[0023] Figure 4 Structural schematic diagram of the heating mechanism in an embodiment of the present invention;

[0024] Figure 5 Assembly sectional view of the heating mechanism and the second positioning assembly in an embodiment of the present invention;

[0025] Figure 6 Structural schematic diagram of the first positioning assembly in an embodiment of the present invention.

[0026] Explanation of the symbols of the components in the drawings:

[0027] Support mechanism 100, bottom plate 110, first support assembly 120, first support column 121, second support column 122, transmission bar 123, second support assembly 130, third support column 131, elastic member 132, positioning mechanism 200, first positioning assembly 210, positioning plate 211, positioning sleeve 212, adjusting member 213, second positioning assembly 220, positioning cylinder 221, mounting edge 222, receiving groove 223, heating mechanism 300, fixing plate 310, heating member 320, heating controller 330, steel shaft 400, rotor end cover plate 500. Detailed Embodiments

[0028] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] Please refer to Figures 1-6 , which shows a schematic structural diagram of a shaft hole assembly device for a rotor assembly provided in an embodiment of the present invention. The shaft hole assembly device for the rotor assembly includes a support mechanism 100, a positioning mechanism 200 provided on the support mechanism 100, and a heating mechanism 300 provided in the positioning mechanism 200, wherein:

[0032] To support the positioning mechanism 200 and the heating mechanism 300, the support mechanism 100 includes a bottom plate 110, a first support assembly 120 and a second support assembly 130 provided on the bottom plate 110 and used to support the positioning mechanism 200. At the same time, in order to better connect the first support assembly 120 and the second support assembly 130, three installation parts are respectively provided on the bottom plate 110. The installation parts symmetrically arranged on both sides are used to connect the first support assembly 120, and the installation part provided in the middle is used to connect the second support assembly 130 and the positioning mechanism 200. The several through holes provided in any one of the installation parts are arranged in a rectangular pattern to provide a stable supporting force for the first support assembly 120, the second support assembly 130, and the positioning mechanism 200. It is worth noting that a hole groove for passing through the heating mechanism 300 is also provided at the center of the bottom plate 110 for heating the rotor end cover plate 500 provided on the positioning mechanism 200.

[0033] Further, to support the positioning mechanism 200, the first support assembly 120 includes a first support column 121 and a second support column 122 vertically provided at both ends of the bottom plate 110. The first support column 121 and the second support column 122 are arranged in parallel and have the same height. Both the first support column 121 and the second support column 122 are connected to the bottom plate 110 through a cylindrical connecting member, and 4 connecting holes are respectively provided at equal intervals on the circumference of the connecting member, and fasteners such as bolts can be used to connect them to the installation parts on both sides of the bottom plate 110. The connection method between the first support column 121 and the connecting member can be a fixed connection method such as welding to enhance the overall structural stability, and the multi-hole connection method provides strong support for the first support column 121 and the second support column 122.

[0034] In addition, to enable the positioning mechanism 200 to move along the length directions of the first support column 121 and the second support column 122, a transmission bar 123 is further provided on the side of the second support column 122 away from the first support column 121. The transmission bar 123 is also arranged along the length direction of the second support column 122, so that the positioning mechanism 200 can move up and down along the transmission bar 123.

[0035] Furthermore, the second support assembly 130 includes at least two third support columns 131 vertically provided on the bottom plate 110. One end of the third support column 131 away from the bottom plate 110 is provided in the fixing plate 310. The third support group is used to support the heating mechanism 300, so that the heating mechanism 300 can abut against the rotor end cover plate 500, facilitating the positioning mechanism 200 to drive the rigid shaft to move downward and push open the heating mechanism 300 to penetrate into the rotor end cover plate 500.

[0036] To maintain the state of lifting the heating mechanism 300, an elastic member 132 is further provided on the circumferential surface of the third support column 131. Both ends of the elastic member 132 respectively abut against the bottom of the heating mechanism 300 and the upper end surface of the bottom plate 110, so that when the heating mechanism 300 is not oppressed, the heating mechanism 300 can maintain the lifted state, and then heat the rotor end cover plate 500 sleeved on the heating assembly.

[0037] To make the aperture of the central hole of the rotor end cover plate 500 larger by using the principle of thermal expansion and contraction for the rigid shaft to penetrate, the heating mechanism 300 includes a fixing plate 310 provided in the positioning mechanism 200, a heating element 320 provided on the fixing plate 310, and a heating controller 330 electrically connected to the heating element 320. The heating element 320 passes through the middle of the fixing plate 310, and both ends are respectively sleeved on the third support columns 131 and can move up and down along the length directions of the third support columns 131. At the same time, the heating controller 330 enters from the empty slot on the middle installation part of the bottom plate 110 and is electrically connected to the heating element 320 to energize and heat the heating element 320.

[0038] According to one aspect of the above technical solution, in order to enable the steel shaft 400 to be smoothly replaced with the heating element 320 and pass through the rotor end cover plate 500, the positioning mechanism 200 includes a first positioning component 210 movably connected to the first support column 121 and the second support column 122, and a second positioning component 220 fixedly connected to the bottom plate 110. The steel shaft 400 is arranged on the first positioning component 210 and is aligned with the center of the second positioning component 220. The first positioning mechanism 200 is simultaneously sleeved on the first support column 121 and the second support column 122 and can move up and down along the length directions of the first support column 121 and the second support column 122, while the second support component 130 can be fixedly connected to the installation part in the middle of the bottom plate 110 through fasteners such as bolts.

[0039] For the purpose of using the steel shaft 400 to push open the heating element 320, the first positioning component 210 includes a positioning plate 211 and a positioning sleeve 212 arranged on the positioning plate 211. The middle of the positioning sleeve 212 is hollow, and the part of the positioning plate 211 aligned with the hollow part of the positioning sleeve 212 is also hollowed out, so that the steel shaft 400 arranged on the positioning sleeve 212 can pass through the positioning plate 211 and be aligned with the center of the second positioning component 220.

[0040] In addition, an adjusting member 213 is provided at one end of the positioning plate 211 close to the second support column 122. When the positioning plate 211 is sleeved on the second support column 122, the adjusting member 213 arranged at one end of the positioning plate 211 is just meshed and connected with the transmission bar 123. By rotating the adjusting member 213 in different directions, the positioning plate 211 can be moved up or down to drive the steel shaft 400 to move.

[0041] In order to align the central hole of the rotor end cover plate 500 with the steel shaft 400, the second positioning component 220 includes a positioning cylinder 221 and a mounting edge 222 arranged on the positioning cylinder 221. A receiving groove 223 is provided in the positioning cylinder 221. The fixing plate 310 and the heating element 320 are arranged in the receiving groove 223, and the heating element 320 penetrates through the positioning cylinder 221 for passing through the rotor end cover plate 500. Since the heating element 320 penetrates out from the center of the positioning cylinder 221 under the support of the elastic member 132 and is aligned with the steel shaft 400, when the rotor end cover plate 500 is sleeved on the heating element 320, the central hole of the rotor end cover plate 500 is also just aligned with the steel shaft 400. It is worth noting that the receiving groove 223 is arranged in imitation of the fixing plate 310, so that when the fixing plate 310 moves in the receiving groove 223, it can fit the track of the receiving groove 223 to make its movement smoother and avoid jamming.

[0042] The working process of this device is as follows:

[0043] The heating controller 330 controls the heating element 320 to heat the central hole of the rotor end cover plate 500. The central hole of the rotor end cover plate 500 expands and contracts due to heat and cold, and the aperture becomes larger. As the adjusting member 213 drives the positioning plate 211 to descend, the steel shaft 400 abuts against the top of the heating element 320. As the adjusting member 213 drives the positioning plate 211 to descend further, at this time the elastic member 132 is compressed until the heating element 320 is pressed back into the positioning cylinder 221, and the steel shaft 400 replaces the heating element 320 and passes through the rotor end cover plate 500, completing the assembly process.

[0044] In summary, according to the shaft hole assembly device of the rotor assembly provided by the present invention, by sleeving the rotor end cover plate on the heating element, controlling heating through the heating controller, and using the principle of expansion and contraction due to heat and cold, the aperture of the central hole of the rotor end cover plate becomes larger. At this time, the positioning mechanism is used to drive the steel shaft to move, push open the heating element, and pass through the rotor end cover plate. When the rotor end cover plate cools down, the steel shaft and the rotor end cover plate are assembled. Specifically, the heating mechanism includes a fixing plate provided in the positioning mechanism, a heating element provided on the fixing plate, and a heating controller electrically connected to the heating element; the rotor end cover plate is sleeved on the heating element, the steel shaft is provided on the positioning mechanism, the steel shaft is aligned with the heating element, the heating controller heats the heating element, and the positioning mechanism drives the steel shaft to move towards the heating element until the steel shaft pushes open the heating element and passes through the rotor end cover plate. The present invention replaces the traditional hard press-fitting method, uses the principle of expansion and contraction due to heat and cold, reduces the possibility of damage to the steel shaft and the rotor end cover plate, realizes damage-free, high concentricity, and high firmness assembly, solves the swing caused by the excessive length of the outer-rotor motor rotor, and makes its operation more stable.

[0045] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A shaft hole assembly device for a rotor assembly, characterized in that: The shaft hole assembly device of the rotor assembly includes a supporting mechanism, a positioning mechanism arranged on the supporting mechanism, and a heating mechanism arranged in the positioning mechanism; A heating mechanism, comprising a fixing plate disposed in the positioning mechanism, a heating element disposed on the fixing plate, and a heating controller electrically connected to the heating element; The support mechanism comprises a bottom plate, a first support assembly and a second support assembly arranged on the bottom plate and used to support the positioning mechanism, wherein the second support assembly comprises at least two third support columns arranged vertically on the bottom plate, one end of the third support column away from the bottom plate is arranged in the fixed plate, and an elastic member is sleeved on the circumferential surface of the third support column, and both ends of the elastic member are respectively against the end surfaces of the fixed plate and the bottom plate; The positioning mechanism comprises a first positioning assembly movably connected to the first supporting column and the second supporting column, and a second positioning assembly fixedly connected to the bottom plate, wherein the steel shaft is arranged at the first positioning assembly and faces the center of the second positioning assembly; Among them, the rotor end cover plate is sleeved on the heating element, the steel shaft is aligned with the heating element, the heating controller heats the heating element, the first positioning assembly drives the steel shaft to move toward the heating element and pushes the heating element open, and drives the fixed plate to compress the elastic part on the third support column until the steel shaft pushes the heating element open and passes through the rotor end cover plate.

2. The shaft hole assembly device of the rotor assembly according to claim 1, characterized in that: The first support assembly includes a first support column and a second support column vertically disposed at two ends of the bottom plate. The first support column and the second support column are disposed in parallel and have the same height.

3. The shaft hole assembly device of the rotor assembly according to claim 2, characterized in that: A transmission bar for moving the positioning mechanism is also provided on a side of the second supporting column away from the first supporting column.

4. The shaft hole assembly device of the rotor assembly according to claim 1, characterized in that: The first positioning assembly includes a positioning plate and a positioning sleeve disposed on the positioning plate, and the positioning sleeve is directly opposite to the center of the second positioning assembly.

5. The shaft hole assembly device of the rotor assembly according to claim 4, characterized in that: An adjusting piece is also provided at one end of the positioning plate, and the adjusting piece is meshedly connected with the transmission bar.

6. The shaft hole assembly device of the rotor assembly according to claim 1, characterized in that: The second positioning assembly includes a positioning cylinder and a mounting edge arranged on the positioning cylinder. The positioning cylinder is provided with a receiving groove. The fixing plate and the heating element are arranged in the receiving groove. The heating element passes through the positioning cylinder for penetrating the rotor end cover plate.

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