Shaft hole assembling device of rotor assembly

Abstract

The invention discloses a shaft hole assembling device of a rotor assembly. The shaft hole assembling device comprises a supporting mechanism, a positioning mechanism arranged on the supporting mechanism and a heating mechanism arranged in the positioning mechanism. The heating mechanism comprises a fixing plate arranged in the positioning mechanism, a heating piece arranged on the fixing plate and a heating controller electrically connected with the heating piece; the rotor end cover plate is arranged on the heating piece in a sleeving mode, the steel shaft is arranged on the positioning mechanism, the steel shaft and the heating piece are arranged in an aligned mode, the heating controller heats the heating piece, and the positioning mechanism drives the steel shaft to move towards the heating piece till the steel shaft ejects the heating piece open and is arranged in the rotor end cover plate in a penetrating mode. The rotor end cover plate is arranged on the heating piece in a sleeving mode, heating is controlled through the heating controller, the diameter of the center hole of the rotor end cover plate is increased according to the principle of thermal expansion and cold contraction, at the moment, the steel shaft is driven by the positioning mechanism to move, the heating piece is jacked open and penetrates into the rotor end cover plate, and after the rotor end cover plate is cooled, the rotor end cover plate is cooled. And the steel shaft and the rotor end cover plate are assembled.

Description

Technical Field

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

[0002] In the motor, the rotor of the brushless motor usually includes a gear part and a magnetic core. The center of the gear part has a through hole for the steel shaft to pass through. The steel shaft is fixedly connected to the stator to achieve smooth rotation of the gear part. The assembly quality of the steel shaft of the rotor assembly and the rotor end cover directly affects the performance and reliability of the motor.

[0003] At present, after confirming that the steel shaft and rotor end cover plate in the rotor assembly are clean and complete, the rotor end cover plate is accurately placed in the predetermined position through positioning tooling or positioning holes to ensure that its assembly position with the steel shaft is accurate, and 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 press-fitting method, if the dimensional accuracy of the center hole of the rotor end cover plate fails to meet the standard, during the press-fitting process, the center hole or the steel shaft is prone to component damage due to hard press-fitting, thereby affecting the press-fitting 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 in the current press-fitting method that if the dimensional accuracy of the center hole of the rotor end cover plate fails to meet the standard, during the press-fitting process, the center hole or the steel shaft is prone to component damage due to hard press-fitting, thereby affecting the press-fitting effect.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions: a shaft hole assembly device for a rotor assembly, the shaft hole assembly device for the rotor assembly comprising a support mechanism, a positioning mechanism provided on the support mechanism, and a heating mechanism provided 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; Among them, the rotor end cover plate is sleeved on the heating element, the steel shaft is arranged 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 toward the heating element until the steel shaft pushes open the heating element and passes through the rotor end cover plate.

[0007] In summary, according to the shaft hole assembly device of the rotor assembly provided by the present invention, by sleeve-mounting the rotor end cover plate on the heating element, the heating element is controlled by the heating controller to heat, and the diameter of the center hole of the rotor end cover plate is enlarged by utilizing the principle of thermal expansion and contraction. At this time, the steel shaft is driven to move by the positioning mechanism, the heating element is pushed open, and is inserted into the rotor end cover plate. When the rotor end cover plate is cooled, the steel shaft and the rotor end cover plate are assembled. Specifically, the heating mechanism includes a fixed plate arranged in the positioning mechanism, a heating element arranged on the fixed 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 arranged 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 toward the heating element until the steel shaft pushes the heating element open and is inserted into the rotor end cover plate. The present invention replaces the traditional rigid press-fitting 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 lossless, high concentricity, and high firmness assembly, solves the swing caused by the excessive length of the outer rotor motor, and makes it run more smoothly.

[0008] According to one aspect of the above technical solution, the support mechanism includes a base plate, a first support component and a second support component which are arranged on the base plate and are used to support the positioning mechanism.

[0009] According to one aspect of the above technical solution, the first support assembly includes a first support column and a second support column vertically arranged at two ends of the bottom plate, and the first support column and the second support column are arranged in parallel and have the same height.

[0010] According to one aspect of the above technical solution, a transmission bar for moving the positioning mechanism is further provided on the side of the second support column away from the first support column.

[0011] According to one aspect of the above technical solution, the second support assembly includes at least two third support columns vertically arranged on the bottom plate, and one end of the third support column away from the bottom plate is arranged in the fixed plate.

[0012] 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 two ends of the elastic member respectively abut against the end surfaces of the fixing plate and the bottom plate.

[0013] 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 base plate, and a steel shaft is arranged on the first positioning component and faces the center of the second positioning component.

[0014] According to one aspect of the above technical solution, 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.

[0015] 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 meshedly connected with the transmission bar.

[0016] According to one aspect of the above technical solution, the second positioning assembly includes a positioning cylinder and a mounting edge arranged on the positioning cylinder, a receiving groove is arranged in the positioning cylinder, the fixing plate and the heating element are arranged in the receiving groove, and the heating element passes through the positioning cylinder for penetrating the rotor end cover plate.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a shaft hole assembly device of a rotor assembly in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a bottom plate in one embodiment of the present invention; Figure 3 It is a structural schematic diagram of a second positioning component in one embodiment of the present invention; Figure 4 It is a structural schematic diagram of a heating mechanism in one embodiment of the present invention; Figure 5 It is a cross-sectional view of the heating mechanism and the second positioning assembly in one embodiment of the present invention; Figure 6 Schematic diagram of the structure of a first positioning component in one embodiment of the present invention.

[0019] Component symbol description: Support mechanism 100, base 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, accommodating groove 223, heating mechanism 300, fixing plate 310, heating member 320, heating controller 330, steel shaft 400, rotor end cover plate 500. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given 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, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention 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.

[0023] See also Figure 1-Figure 6 , which is a schematic structural diagram of a shaft hole assembly device for a rotor assembly according to an embodiment of the present invention, wherein the shaft hole assembly device for a rotor assembly comprises a support mechanism 100, a positioning mechanism 200 disposed on the support mechanism 100, and a heating mechanism 300 disposed in the positioning mechanism 200, wherein: In order to support the positioning mechanism 200 and the heating mechanism 300, the supporting mechanism 100 includes a bottom plate 110, a first supporting assembly 120 and a second supporting 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 supporting assembly 120 and the second supporting assembly 130, three mounting parts are respectively provided on the bottom plate 110, the mounting parts symmetrically arranged on both sides are used to connect the first supporting assembly 120, and the mounting part arranged in the middle is used to connect the second supporting assembly 130 and the positioning mechanism 200, and the plurality of through holes provided in any mounting part are arranged in a rectangular style to provide a stable supporting force for the first supporting assembly 120, the second supporting assembly 130, and the positioning mechanism 200. It is worth noting that a hole groove for passing the heating mechanism 300 is also provided at the center of the bottom plate 110, so as to heat the rotor end cover plate 500 provided on the positioning mechanism 200.

[0024] Furthermore, in order to support the positioning mechanism 200, the first support assembly 120 includes a first support column 121 and a second support column 122 vertically disposed at both ends of the base plate 110, and the first support column 121 and the second support column 122 are disposed in parallel and at equal heights. The first support column 121 and the second support column 122 are both connected to the base plate 110 through a cylindrical connector, and four connection holes are equidistantly disposed on the circumference of the connector, and can be connected to the mounting portions disposed on both sides of the base plate 110 by fasteners such as bolts. The connection between the first support column 121 and the connector can be fixedly connected by welding or other methods to enhance the stability of the overall structure, and the porous connection method provides strong support for the first support column 121 and the second support column 122.

[0025] In addition, in order to enable the positioning mechanism 200 to move along the length direction of the first support column 121 and the second support column 122, a transmission bar 123 is also 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 this transmission bar 123.

[0026] Furthermore, the second support assembly 130 includes at least two third support columns 131 vertically arranged on the bottom plate 110, and one end of the third support column 131 away from the bottom plate 110 is arranged in the fixing plate 310. The third support group is used to support the heating mechanism 300, so that the heating mechanism 300 can be pressed against the rotor end cover plate 500, so that the positioning mechanism 200 drives the rigid shaft to move downward, and pushes open the heating mechanism 300 and penetrates into the rotor end cover plate 500.

[0027] In order to keep the heating mechanism 300 in an elevated state, an elastic member 132 is further provided on the circumferential surface of the third support column 131, and the two ends of the elastic member 132 respectively abut against the bottom of the heating mechanism 300 and the upper end surface of the base plate 110, so that when the heating mechanism 300 is not pressed, the heating mechanism 300 can maintain an elevated state, thereby heating the rotor end cover plate 500 mounted on the heating assembly.

[0028] In order to utilize the principle of thermal expansion and contraction to enlarge the diameter of the central hole of the rotor end cover plate 500 and facilitate the installation of the rigid shaft, the heating mechanism 300 includes a fixed plate 310 disposed in the positioning mechanism 200, a heating element 320 disposed on the fixed plate 310, and a heating controller 330 electrically connected to the heating element 320. The heating element 320 is inserted in the middle of the fixed plate 310, and the two ends are respectively sleeved on the third support column 131, and can move up and down along the length direction of the third support column 131. At the same time, the heating controller 330 enters from the empty slot on the middle mounting portion of the bottom plate 110 and is electrically connected to the heating element 320 to electrically heat the heating element 320.

[0029] According to one aspect of the above technical solution, in order to enable the steel shaft 400 to smoothly replace the heating element 320 and pass through the rotor end cover plate 500, the positioning mechanism 200 includes a first positioning assembly 210 movably connected to the first support column 121 and the second support column 122, and a second positioning assembly 220 fixedly connected to the bottom plate 110, and the steel shaft 400 is arranged on the first positioning assembly 210 and faces the center of the second positioning assembly 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 direction of the first support column 121 and the second support column 122, while the second support assembly 130 can be fixedly connected to the mounting portion in the middle of the bottom plate 110 by fasteners such as bolts.

[0030] In order to use the steel shaft 400 to push open the heating element 320, the first positioning assembly 210 includes a positioning plate 211 and a positioning sleeve 212 arranged on the positioning plate 211. The positioning sleeve 212 is hollow in the middle, and the portion where the positioning plate 211 and the hollow portion of the positioning sleeve 212 are aligned is also hollowed out, so that the steel shaft 400 arranged on the positioning sleeve 212 can pass through the positioning plate 211 and face the center of the second positioning assembly 220.

[0031] 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 provided at one end of the positioning plate 211 is engaged 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.

[0032] In order to align the center hole of the rotor end cover plate 500 with the steel shaft 400, the second positioning assembly 220 includes a positioning cylinder 221 and a mounting edge 222 arranged on the positioning cylinder 221. The positioning cylinder 221 is provided with a receiving groove 223. The fixing plate 310 and the heating element 320 are arranged in the receiving groove 223, and the heating element 320 passes through the positioning cylinder 221 for penetrating the rotor end cover plate 500. Since the heating element 320 is supported by the elastic element 132 and penetrates the center of the positioning cylinder 221 and faces the steel shaft 400, when the rotor end cover plate 500 is sleeved on the heating element 320, the center hole of the rotor end cover plate 500 also just faces the steel shaft 400. It is worth noting that the receiving groove 223 is configured to be contoured with the fixing plate 310, so that when the fixing plate 310 moves in the receiving groove 223, it can fit the trajectory of the receiving groove 223, making it move more smoothly and avoiding jamming.

[0033] The working process of this device is: The heating controller 330 controls the heating element 320 to heat the center hole of the rotor end cover plate 500. The center hole of the rotor end cover plate 500 expands and contracts with heat 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 further descend, the elastic member 132 is compressed until the heating element 320 is pressed back into the positioning cylinder 221. The steel shaft 400 replaces the heating element 320 and is passed through the rotor end cover plate 500, and the assembly process is completed.

[0034] In summary, according to the shaft hole assembly device of the rotor assembly provided by the present invention, by sleeve-mounting the rotor end cover plate on the heating element, the heating is controlled by the heating controller, and the diameter of the center hole of the rotor end cover plate becomes larger through the principle of thermal expansion and contraction. At this time, the positioning mechanism is used to drive the steel shaft to move, the heating element is pushed open, and it is inserted into the rotor end cover plate. When the rotor end cover plate is cooled, the steel shaft and the rotor end cover plate are assembled. Specifically, the heating mechanism includes a fixed plate arranged in the positioning mechanism, a heating element arranged on the fixed 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 arranged 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 toward the heating element until the steel shaft pushes the heating element open and is inserted into the rotor end cover plate. The present invention replaces the traditional rigid press-fitting 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 lossless, high concentricity, and high firmness assembly, solves the swing caused by the excessive length of the outer rotor motor, and makes it run more smoothly.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached 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; Among them, the rotor end cover plate is sleeved on the heating element, the steel shaft is arranged 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 toward the heating element until the steel shaft pushes open the heating element 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 supporting mechanism comprises a bottom plate, a first supporting assembly and a second supporting assembly which are arranged on the bottom plate and are used to support the positioning mechanism.

3. The shaft hole assembly device of the rotor assembly according to claim 2, 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.

4. The shaft hole assembly device of the rotor assembly according to claim 3, 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.

5. The shaft hole assembly device of the rotor assembly according to claim 2, characterized in that: The second supporting assembly includes at least two third supporting columns vertically arranged on the bottom plate, and one end of the third supporting column away from the bottom plate is arranged in the fixing plate.

6. The shaft hole assembly device of the rotor assembly according to claim 5, characterized in that: An elastic member is also sleeved on the circumferential surface of the third support column, and two ends of the elastic member are respectively pressed against the end surfaces of the fixing plate and the bottom plate.

7. The shaft hole assembly device of the rotor assembly according to claim 1, characterized in that: 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. The steel shaft is arranged on the first positioning component and faces the center of the second positioning component.

8. The shaft hole assembly device of the rotor assembly according to claim 7, 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.

9. The shaft hole assembly device of the rotor assembly according to claim 8, 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.

10. The shaft hole assembly device of the rotor assembly according to claim 7, 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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