Motor rotor locking ring hot mounting equipment
By using induction heating and cooling technology, the locking ring and the shaft are made to form an interference fit, which solves the stability problem caused by the clearance fit between the locking ring and the shaft, and improves the stability of the motor rotor and the assembly efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING CHERVON IND
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-24
Smart Images
Figure CN224555426U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the technical field of motor rotors, such as a motor rotor locking ring heat fitting device. Background Technology
[0002] A motor rotor assembly is generally composed of parts such as a shaft, iron core, magnets, and locking rings. The locking ring is a core mechanical component used to secure the rotor core, magnets, or bearings. During the assembly process of the motor rotor, the locking ring is usually fitted onto the shaft after the shaft, iron core, and magnets are assembled. The assembly reliability of the locking ring directly determines the dynamic stability of the motor under high-speed conditions.
[0003] In related technologies, there are already some specialized devices used to press the locking ring into the rotating shaft under high pressure. However, these devices use press-fitting technology to assemble the locking ring, resulting in a clearance fit between the locking ring and the rotating shaft, which affects the stability of the locking ring and the motor rotor.
[0004] This section provides background information related to this application, which is not necessarily prior art. Utility Model Content
[0005] One objective of this application is to solve or at least mitigate some or all of the aforementioned problems. This application provides a motor rotor locking ring heat fitting device, which first induction heats the locking ring to complete the heat fitting with the shaft at a high temperature, and then cools the locking ring and shaft after heat fitting to form an interference fit to secure the shaft, thereby improving the stability of the locking ring and shaft.
[0006] To achieve the above objectives, this application adopts the following technical solution: a motor rotor locking ring hot fitting device, wherein the motor rotor includes a rotating shaft and a locking ring, and the motor rotor locking ring hot fitting device includes: a heating mechanism configured to perform high-frequency induction heating on the locking ring; a pressing mechanism configured to press the rotating shaft and the heated locking ring together and hold them under pressure; and a cooling mechanism configured to cool the assembled rotating shaft and locking ring to room temperature.
[0007] In one embodiment, the heating mechanism includes a heating coil and a heating controller electrically connected to the heating coil. The heating controller provides a high-frequency current to the heating coil for heating, and the heating coil heats the locking ring.
[0008] In one embodiment, the locking ring is heated to a temperature of 370°C-400°C.
[0009] In one embodiment, a water chiller is also included, which provides cooling water to the heating coil for cooling.
[0010] In one embodiment, the pressing mechanism includes a locking ring positioning seat, a rotating shaft positioning seat, and a servo press arranged sequentially in the vertical direction; the locking ring positioning seat is used to position and lock the locking ring, the rotating shaft positioning seat is used to position and lock the rotating shaft, and the servo press presses down the rotating shaft to press and retain the locking ring under pressure.
[0011] In one embodiment, the pressure holding time is 40-60 seconds.
[0012] In one embodiment, the motor rotor locking ring hot fitting device further includes a water chiller. A cooling channel is provided in the cavity of the locking ring positioning seat. The water chiller delivers cooling water to the cooling channel of the locking ring positioning seat to cool the locking ring installed above.
[0013] In one embodiment, the pressing mechanism further includes a cooling air blower configured to blow air toward the locking ring and the pivot for cooling.
[0014] In one embodiment, the cooling mechanism includes a conveyor frame and a fan, the conveyor frame being configured to hold the assembled motor rotor and the fan being configured to blow air onto the motor rotor for cooling.
[0015] In one embodiment, the conveyor frame includes a conveyor frame body, a conveyor chain disposed around the conveyor frame body, and a conveyor drive unit for driving the conveyor chain to move. The conveyor chain is provided with multiple positioning plates for storing motor rotors. After the multiple positioning plates are filled with motor rotors, the conveyor drive unit drives the conveyor chain to move a distance of one positioning plate.
[0016] In one embodiment, a feeding mechanism is also included, which includes a storage rack and a feeding drive. A locking ring is sleeved on the storage rack and can move axially on the storage rack. The feeding drive is located at the end of the storage rack and pushes the locking ring that has moved to the end of the storage rack to the heating mechanism station.
[0017] The beneficial effects of this application are as follows: First, the locking ring is subjected to high-frequency induction heating by a heating mechanism, causing the inner hole of the locking ring to expand due to heat. Then, a pressing mechanism allows the locking ring to be heat-fitted with the rotating shaft at high temperature with a clearance fit. Finally, a cooling mechanism cools the heat-fitted locking ring and rotating shaft to convert them into an interference fit, enabling the locking ring to lock the rotating shaft and improving the stability of the locking ring and rotating shaft. The equipment can automatically complete the entire assembly process of the locking ring and rotating shaft, improving assembly efficiency. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of the rotating shaft and locking ring before and after installation, as provided in the embodiments of this application;
[0020] Figure 2 This is a schematic diagram of the structure of the motor rotor locking ring heat fitting device provided in the embodiments of this application;
[0021] Figure 3 This is a schematic diagram of the structure of the motor rotor locking ring heat fitting device provided in the embodiments of this application from another perspective;
[0022] Figure 4 yes Figure 2 A schematic diagram of the heating mechanism of the equipment;
[0023] Figure 5 yes Figure 2 A schematic diagram of the pressing mechanism of the equipment;
[0024] Figure 6 yes Figure 2 A schematic diagram of the servo press in the middle of the equipment;
[0025] Figure 7 yes Figure 5 Another structural diagram of the intermediate pressure assembly mechanism;
[0026] Figure 8 yes Figure 2 A schematic diagram of the cooling mechanism of the equipment;
[0027] Figure 9 yes Figure 2 A schematic diagram of the transfer mechanism of the equipment;
[0028] Figure 10 yes Figure 2 A schematic diagram of the feeding mechanism of the equipment. Detailed Implementation
[0029] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.
[0030] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0031] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.
[0032] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.
[0033] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not use relative terms should also be disclosed as specific values with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.
[0034] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.
[0035] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.
[0036] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. When using the unit "controller," "processor," "central processing unit," "CPU," or "MCU" to perform a specific function, unless otherwise stated, these functions may be performed by a single or multiple of the aforementioned units.
[0037] In this application, the terms "device," "module," or "unit" are used to describe devices that can be implemented in hardware or software to achieve a specific function.
[0038] In this application, the terms “calculation,” “judgment,” “control,” “determine,” “identify,” etc., refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).
[0039] like Figure 1 As shown, the motor rotor 10 includes a shaft 11 and a locking ring 12. The shaft 11 is already fitted with components such as an iron core and magnets. Both the shaft 11 and the locking ring 12 are made of steel. The motor rotor locking ring heat-fitting device of this application embodiment is used to assemble the locking ring 12 onto the shaft 11. Figure 1 The left side of the middle figure shows a schematic diagram of the rotating shaft 11 and locking ring 12 before assembly. Figure 1 The right side of the figure shows a schematic diagram of the assembly of the rotating shaft 11 and the locking ring 12. The locking ring 12 and the rotating shaft 11 are assembled to form the motor rotor 10.
[0040] Figure 2 This is a schematic diagram of the structure of a motor rotor locking ring heat fitting device provided in an embodiment of this application. Figure 3 This is a structural schematic diagram from another perspective of the motor rotor locking ring heat fitting device provided in the embodiments of this application. The motor rotor locking ring heat fitting device can also be simply referred to as the "device". To clearly illustrate the technical solution of this application, the following definitions are also provided: Figure 2 The directions shown are: front, back, left, right, up, and down.
[0041] like Figures 2 to 10 As shown, the motor rotor locking ring heat fitting device 100 of this application embodiment includes a heating mechanism 110, a pressing mechanism 120, and a cooling mechanism 130. The heating mechanism 110 is configured to perform high-frequency induction heating on the locking ring 12. The pressing mechanism 120 is configured to press the rotating shaft 11 and the heated locking ring 12 together and hold them under pressure. The cooling mechanism 130 is configured to cool the assembled rotating shaft 11 and locking ring 12 to room temperature.
[0042] The motor rotor locking ring heat fitting device 100 of this application first uses a heating mechanism 110 to perform high-frequency induction heating on the locking ring 12, causing the inner hole of the locking ring 12 to expand due to heat. Then, the pressing mechanism 120 makes the locking ring 12 and the rotating shaft 11 complete the clearance fit heat fitting at high temperature. Finally, the cooling mechanism 130 cools the hot-fitted locking ring 12 and the rotating shaft 11 to transform them into an interference fit, so that the locking ring 11 and the rotating shaft 11 are firmly connected, improving the stability of the locking ring and the rotating shaft.
[0043] like Figure 4 As shown, the heating mechanism 110 includes a heating coil 111 and a heating controller 112. The heating controller 112 is electrically connected to the heating coil 111 and provides a high-frequency current to the heating coil 111 for heating. The heating controller 112 can adjust and control the heating power of the heating coil 111. The heating coil 111 is configured to heat the locking ring 12. Specifically, the heating controller 112 is located on one side of the equipment rack 160, and the heating coil 111 is suspended on the first support frame 114. The first support frame 114 is located on the control panel of the equipment rack 160. The first drive member 115 drives the locking ring 12 to rise, raising the locking ring 12 to the heating coil 111 for high-frequency induction heating. For example, the heating controller 112 can be a microcontroller or a single-chip microcomputer, and the heating coil 111 is a copper tube.
[0044] The locking ring 12 is heated to 370℃-400℃. Through process testing, it was shown that when the locking ring 12 is heated to 370℃, the inner diameter of the locking ring 12 expands by approximately 0.1mm-0.12mm due to heat; the higher the temperature, the greater the expansion. This causes the fit with the outer diameter of the rotating shaft 11 to change from an interference fit in the cooled state to a clearance fit, satisfying the requirement for non-destructive installation. Excessive heating temperature can lead to adverse heat treatment effects on the internal material of the locking ring 12; therefore, the heating temperature of the locking ring is set to be less than or equal to 400℃. In one embodiment, the locking ring 12 is heated to 370℃-390℃.
[0045] To better detect and control the heating process, the heating mechanism 100 is also equipped with a temperature sensor 116, which is mounted on the first support frame 114. The probe of the temperature sensor 116 extends into the heating coil 111 to measure the heating temperature of the locking ring 12. The temperature sensor 116 is electrically connected to the heating controller 112, and feeds back the measured heating temperature of the locking ring 12 to the heating controller 112. The heating controller 112 then adjusts the heating power of the heating coil 111, allowing the locking ring 12 to quickly reach the preset target temperature (e.g., 370-400℃). Through the cooperation of the temperature sensor 116 and the heating controller 112, the locking ring 12 can be heated to the preset target temperature in about 8-12 seconds (e.g., 10 seconds). Once the temperature sensor 116 detects that the locking ring 12 has reached the preset target temperature, it transfers the heated locking ring 12 to the pressing mechanism 120 for heat fitting. For example, the temperature sensor 116 is a temperature sensor.
[0046] The motor rotor locking ring heat fitting device 100 also includes a water chiller 113. The water chiller 113 is configured to provide cooling water to the copper tubes of the heating coil 111 to cool the heating coil 111, thus preventing the heating coil 111 from overheating. The temperature of the cooling water is generally 20℃-25℃. The water chiller 113 is located on the side of the heating controller 112, and the water chiller 113 supplies cooling water to the copper tubes of the heating coil 111.
[0047] like Figures 5 to 7As shown, the pressing mechanism 120 includes a locking ring positioning seat 121, a rotating shaft positioning seat 122, and a servo press 123 arranged sequentially in the vertical direction. The locking ring positioning seat 121 is located on the control console, the rotating shaft positioning seat 122 is located above the locking ring positioning seat 121, and the servo press 123 is located above the rotating shaft positioning seat 122. The locking ring positioning seat 121 is used to position and lock the locking ring 12. After heating, the locking ring 12 is transferred to the locking ring positioning seat 121 for positioning and locking by the pressing feed drive 153 in the transfer mechanism 140. The rotating shaft positioning seat 122 is used to position and lock the rotating shaft 11. The rotating shaft positioning seat 122 has a through hole for the rotating shaft 11 to pass through. The rotating shaft 11 is manually placed into the through hole for positioning and locking. The locking ring positioning seat 121 and the rotating shaft positioning seat 122 fix the rotating shaft 11 directly above the locking ring 12. The axis of the rotating shaft 11 and the center line of the locking ring 12 are basically on the same vertical line. That is, the center of the rotating shaft 11 is aligned vertically with the center of the locking ring 12, so that the two can be aligned and pressed together later. The servo press 123 is mounted on the second support frame 125 and is supported above the rotating shaft positioning seat 122. The pressure head 124 of the servo press 123 is located directly above the rotating shaft 11 locked on the rotating shaft positioning seat 122 and aligned with the center of the rotating shaft 11. That is, the centers of the rotating shaft 11, the locking ring 12, and the pressure head 124 are on the same vertical line. The pressure head 124 of the servo press 123 presses down on the rotating shaft 11 and the locking ring 12, maintaining pressure and achieving a heat-fit between the locking ring 12 and the rotating shaft 11, with a clearance fit between them. During pressing, the servo press 123 provides 3 tons of pressure. The pressure holding time of the servo press 123 is 40-60 seconds; for example, it is 50 seconds.
[0048] The pressing mechanism 120 also includes a grating ruler 126 with scale lines for detecting the displacement of the rotating shaft 11 as it is pressed into the locking ring 12. The grating ruler 126 is mounted on the second support frame 125. The pressing mechanism 120 also includes a cooling air blower 127 for blowing air to cool the locking ring 12 and the rotating shaft 11 during pressing and holding, causing the locking ring 12 and the rotating shaft 11 to cool and shrink. The cooling air blower 127 is mounted on the second support frame 125 and blows air towards the locking ring 12 and the rotating shaft 11 for cooling.
[0049] The locking ring positioning seat 121 has a water cooling function. A cooling channel is provided in the cavity formed inside the locking ring positioning seat 121. The water chiller 113 provides cooling water to the locking ring positioning seat 121 and delivers the cooling water to the cooling channel. The cooling water flows along the cooling channel to cool the locking ring 12 installed above the locking ring positioning seat 121.
[0050] The locking ring 12 is press-fitted and pressure-held with the rotating shaft 11 at high temperature. During the press-fitting and pressure-holding process, the water chiller 113 provides cooling water to the locking ring positioning seat 121 to cool the pressed locking ring 12 and the rotating shaft 11. At the same time, the cooling air blower 127 blows air to cool the locking ring 12 and the rotating shaft 11. During the press-fitting and pressure-holding process, the locking ring 12 is cooled simultaneously by water cooling and air cooling, which accelerates the shrinkage of the inner hole of the locking ring 12, so that an interference fit is formed between the rotating shaft 11 and the locking ring 12.
[0051] The cooling (water cooling + air cooling) of station 120 of the pressing mechanism mainly functions to accelerate the cooling and shrinkage of the locking ring 12 under a 3-ton holding force, transforming it from a clearance fit to an interference fit. After holding the pressure for 50 seconds, the residual temperature of the motor rotor 10 is approximately 80℃-100℃, which is outside the safe operating temperature range. Therefore, the motor rotor 10 needs to be transferred to station 130 of the cooling mechanism for further cooling.
[0052] After the rotating shaft 11 and locking ring 12 are assembled, the finished motor rotor 10 is formed. The motor rotor 10 is then transferred to the cooling mechanism 130 for buffering and cooling to room temperature. Figure 8 As shown, the cooling mechanism 130 includes a conveyor frame 131 and a fan 136. The conveyor frame 131 is used to store the assembled motor rotor 10, and the fan 136 is used to blow air to cool the motor rotor 10. The conveyor frame 131 includes a conveyor frame body 132, a conveyor chain 133 disposed around the conveyor frame body 132, and a conveyor drive component 134 for driving the conveyor chain 133 to move. The conveyor chain 133 is provided with a plurality of positioning plates 135 for storing the motor rotor 10. The conveyor drive component 134 is a motor. The fan 136 is disposed below the conveyor frame 131 and blows air towards the motor rotor 10 placed in the positioning plates 135. Each positioning plate 135 includes two placement positions, which can hold two motor rotors 10. The conveyor chain 133 can hold a total of three positioning plates 135 along its length. After all three positioning plates 135 are filled with motor rotors 10, the conveyor drive 134 drives the conveyor chain 133 to move one positioning plate distance. The interval between each movement is approximately twice the equipment pressing cycle time, for example, 120 seconds. While the motor rotors 10 are waiting to move outwards, the fan 136 below continuously cools them to room temperature, and the shaft 11 and locking ring 12 are converted to an interference fit. The interference is greater than or equal to 0.028 mm and less than or equal to 0.066 mm. The two outermost motor rotors 10 are manually removed and placed in a transfer box, and the assembled motor rotors 10 are moved to the next process. In one embodiment, the interference between the shaft 11 and locking ring 12 is greater than or equal to 0.038 mm and less than or equal to 0.056 mm.
[0053] The motor rotor 10 on the conveyor 131 adopts the logic principle of first-in-first-out with a constant interval time. Every 60 seconds (equipment cycle time), a motor rotor 10 to be cooled is placed. A total of 6 motor rotors 10 can be placed on the conveyor chain 133. When the 5th motor rotor 10 is placed, the motor rotor 10 placed for the first time can be cooled to room temperature (about 25℃-30℃) after 240 seconds. Similarly, a finished motor rotor 10 at room temperature is taken out every equipment cycle time.
[0054] like Figure 8 and Figure 9 As shown, the motor rotor locking ring heat fitting device 100 also includes a transfer mechanism 140 for transferring the motor rotor 10 to the cooling mechanism 130. The transfer mechanism 140 includes a first transfer component 141, a second transfer component 142 connected to the first transfer component 141, and a gripper 143 mounted on the second transfer component 142. The first transfer component 141 is mounted on a third support frame 146. The first transfer component 141 is movable along a first direction 144, and the second transfer component 142 is movable along a second direction 145. The first direction 144 and the second direction 145 are perpendicular. For example, the first direction 144 is the left-right direction, which can also be understood as the X-axis direction, and the second direction 145 is the up-down direction, which can also be understood as the Z-axis direction. The transfer mechanism 140 grips the heat-fitted motor rotor 10 with grippers 143 and moves it along the first direction 144 and / or the second direction 145 to the station of the cooling mechanism 130. The grippers 143 are then released, placing the motor rotor 10 into the positioning plate 135 of the cooling mechanism 130. The first transfer assembly 141 and the second transfer assembly 142 are cylinder-driven assemblies, and the grippers 143 are driven by cylinders to achieve gripping and releasing.
[0055] like Figure 10 As shown, the motor rotor locking ring heat fitting device 100 also includes a feeding mechanism 150, which includes a storage rack 151 and a feeding drive 152. The storage rack 151 is used to store the locking rings 12 and is arranged vertically. The locking rings 12 are fitted onto the storage rack 151 and can move axially on the storage rack 151. The feeding drive 152 is located at one end of the storage rack 151 and pushes the bottommost locking ring 12 that has moved to the end of the storage rack 151 to the heating station 154. The heating station 154 can also be understood as the station of the heating mechanism 110. The feeding drive 152 is a cylinder, which has a fast response speed and a simple structure.
[0056] The feeding mechanism 150 also includes a press-fit feeding drive 153, which is used to push the heated locking ring 12 from the heating station 154 to the locking ring positioning seat 121, which is the station of the press-fitting mechanism 120, so that the press-fitting mechanism 120 can complete the assembly of the locking ring 12.
[0057] like Figure 2 and Figure 3 As shown, the motor rotor locking ring heat fitting equipment 100 also includes an equipment frame 160. The heating coil 111, pressing mechanism 120, cooling mechanism 130, transfer mechanism 140 and feeding mechanism 150 of the heating mechanism 110 are all set on the control console of the equipment frame 160. The heating controller 112 and the water chiller 113 are arranged side by side on one side of the equipment frame 160.
[0058] The assembly method of the locking ring 12 and the rotating shaft 11 of the motor rotor locking ring heat fitting device 100 according to the embodiments of this application includes the following steps:
[0059] S110, the operator is in front of the equipment rack 160 and manually puts multiple locking rings 12 on the storage rack 151. The locking rings 12 automatically move along the axial direction of the storage rack 151 to the lower end of the storage rack 151 and are stacked layer by layer. The feeding drive unit 152 is controlled to move the bottommost locking ring 12 to the heating station 154.
[0060] S120, the first driving component 115 is controlled to drive the locking ring 12 to rise, raising the locking ring 12 to the heating coil 111 for high-frequency induction heating. The temperature sensor 116 detects the temperature of the locking ring 12 in real time and heats the locking ring 12 to a temperature of 370℃-400℃, such as 380℃. At the same time, the water chiller provides cooling water to cool the heating coil.
[0061] S130, after the locking ring 12 is heated to the target temperature, the locking ring 12 is lowered to the heating station 154. The press-fitting feeding drive 153 is controlled to push the heated locking ring 12 to the locking ring positioning seat 121. The rotating shaft 11 is manually placed in the through hole of the rotating shaft positioning seat 122 and fixed. The press head 124 of the servo press 123 is controlled to press the rotating shaft 11 and the locking ring 12 together, so that the rotating shaft 11 and the locking ring 12 are in clearance fit and are held under pressure for 50 seconds. During the pressing and holding stages, the water cooler 113 provides cooling water to the locking ring positioning seat 121 to cool the locking ring 12 and the rotating shaft 11. At the same time, the cooling air blower 127 blows air to cool the locking ring 12 and the rotating shaft 11. During the pressing and holding stage, the locking ring 12 is cooled by water cooling and air cooling at the same time, which accelerates the shrinkage of the inner hole of the locking ring 12. After the rotating shaft 11 and the locking ring 12 are assembled, the motor rotor 10 is formed.
[0062] S140, the control transfer mechanism 140 grips the hot-fitted motor rotor 10 via the gripper 143, moves it along the first direction 144 and / or the second direction 145 to the cooling mechanism 130 station, releases the gripper 143 and places the motor rotor 10 in the innermost positioning plate 135 of the cooling mechanism 130, and the fan 136 below blows air onto the placed motor rotor 10 to cool it to room temperature, and the shaft 11 and the locking ring 12 are converted to an interference fit. The interference is greater than or equal to 0.028mm and less than or equal to 0.066mm.
[0063] S150, after the motor rotors 10 are filled in all three positioning plates 135 of the cooling mechanism 130, the transmission drive 134 drives the transmission chain 133 to move one positioning plate distance. The two outermost motor rotors 10 are then manually removed and placed in a turnover box so that the assembled rotors can be transferred to the next process.
[0064] The motor rotor locking ring hot-fitting equipment of this application first uses a heating mechanism 110 to perform high-frequency induction heating on the locking ring 12, causing the inner hole of the locking ring 12 to expand due to heat. Then, a pressing mechanism 120 heats the locking ring 12 with the rotating shaft 11 at high temperature to achieve a clearance fit. Finally, a cooling mechanism 130 cools the hot-fitted locking ring 12 and rotating shaft 11 to transform them into an interference fit, allowing the locking ring 12 to lock the rotating shaft 11, thus improving the stability of the locking ring 12 and rotating shaft 11. The equipment can automatically complete the entire assembly process of the locking ring 12 and rotating shaft 11, including automatic feeding, automatic heating, automatic pressing, and the flow of components between various workstations, thereby improving assembly efficiency.
[0065] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.
Claims
1. A motor rotor locking ring heat fitting device, wherein the motor rotor includes a rotating shaft and a locking ring, characterized in that, The motor rotor locking ring heat fitting equipment includes: The heating mechanism is configured to perform high-frequency induction heating on the locking ring; The press-fitting mechanism is configured to press and hold the rotating shaft and the heated locking ring together under pressure. A cooling mechanism is configured to cool the assembled shaft and the locking ring to room temperature.
2. The motor rotor locking ring heat fitting device according to claim 1, characterized in that, The heating mechanism includes a heating coil and a heating controller electrically connected to the heating coil. The heating controller provides a high-frequency current to the heating coil for heating, and the heating coil heats the locking ring.
3. The motor rotor locking ring heat fitting device according to claim 1, characterized in that, The locking ring is heated to a temperature of 370℃-400℃.
4. The motor rotor locking ring heat fitting device according to claim 2, characterized in that, It also includes a water chiller that provides cooling water to the heating coil for cooling.
5. The motor rotor locking ring heat fitting device according to claim 1, characterized in that, The pressing mechanism includes a locking ring positioning seat, a rotating shaft positioning seat, and a servo press arranged sequentially in the vertical direction; the locking ring positioning seat is used to position and lock the locking ring, the rotating shaft positioning seat is used to position and lock the rotating shaft, and the servo press presses down on the rotating shaft and the locking ring to press and hold under pressure.
6. The motor rotor locking ring heat fitting device according to claim 5, characterized in that, The motor rotor locking ring hot fitting equipment also includes a water chiller. A cooling channel is provided in the cavity of the locking ring positioning seat. The water chiller delivers cooling water to the cooling channel in the locking ring positioning seat to cool the locking ring installed above.
7. The motor rotor locking ring heat fitting device according to claim 5, characterized in that, The pressing mechanism also includes a cooling air blowing component configured to blow air towards the locking ring and the rotating shaft for cooling.
8. The motor rotor locking ring heat fitting device according to claim 1, characterized in that, The cooling mechanism includes a conveyor and a fan. The conveyor is configured to store the assembled motor rotor, and the fan is configured to blow air onto the motor rotor for cooling.
9. The motor rotor locking ring heat fitting device according to claim 8, characterized in that, The conveyor frame includes a conveyor frame body, a conveyor chain disposed around the conveyor frame body, and a conveyor drive unit for driving the conveyor chain to move. The conveyor chain is provided with multiple positioning plates for storing the motor rotors. After the motor rotors are filled in the multiple positioning plates, the conveyor drive unit drives the conveyor chain to move a distance of one positioning plate.
10. The motor rotor locking ring heat fitting device according to claim 1, characterized in that, It also includes a feeding mechanism, which includes a storage rack and a feeding drive. The locking ring is sleeved on the storage rack and can move axially on the storage rack. The feeding drive is located at the end of the storage rack and pushes the locking ring, which has moved to the end of the storage rack, to the heating mechanism station.