A heating device

Abstract

The present invention discloses a heating device, which is provided with a strip heating coil assembly, and the two ends of the strip heating coil assembly are bent to form an inlet and an outlet; at the same time, at least one fixed rotating seat is provided which is movable and self-rotatable along the extension direction of the strip heating coil assembly, and the upper part of the fixed rotating seat is inserted into the strip heating coil assembly. Thus, after the motor housing and the magnet are arranged on the fixed rotating seat, the fixed rotating seat can be directly sent into the strip heating coil assembly from the inlet of the strip heating coil assembly in sequence for heating, and the heated fixed rotating seat can be sent in sequence from the outlet of the strip heating coil assembly, which greatly shortens the time for sending the fixed rotating seat into and out of the strip heating coil assembly, saves the transfer time of the fixed rotating seat, and can heat multiple fixed rotating seats, greatly improves the curing efficiency of the glue, and improves the assembly efficiency of the magnet and the housing.

Description

Technical Field

[0001] The invention relates to the technical field of motor manufacturing, and in particular to a heating device for high-temperature curing of glue on an inner wall of a motor housing during assembly of a magnet and a motor housing. Background Art

[0002] With the development of society and the improvement of people's quality of life, the requirements for motors as power sources are getting higher and higher, thus giving rise to motors used in different industries, such as the automotive industry, power tool industry, drone industry, home electronic equipment industry, etc. Motors in different industries have different uses. There are motors with rotor magnetic coils wound on the rotor and brushless motors with magnetic coils wound on the stator. These motors need to use other mechanisms inside the motor to cut the magnetic flux lines to achieve the power of motor rotation. The reason for the magnetic field is the magnet, which needs to be fixed in the inner wall of the motor housing.

[0003] Regarding the assembly of the magnet and the motor housing, one currently known method is to push the magnet into a jig with a strong magnet, adsorb the magnet on the jig through the strong magnet on the jig, and then press the motor housing with glue on the inner wall into the jig and wrap the magnet. Then, the jig is placed into the corresponding high-frequency heating box by a robot or manually, and the heating coil of the high-frequency heating box is driven down to cover the motor housing on the jig, and the glue is cured at high temperature, so that the magnet is bonded to the inner wall of the housing; after the heating is completed, the jig is removed from the high-frequency heating box by a robot or manually and transferred to the next process.

[0004] The main drawbacks of the above method are that the jig transfer time is long and the efficiency is low, the equipment occupies a large area, a large number of high-frequency heating boxes are required, and the procurement cost and subsequent maintenance cost are high. Summary of the invention

[0005] In view of the problems existing in the prior art, the main purpose of the present invention is to provide a heating device, which aims to solve the problems of long fixture transfer time, low glue heating and curing efficiency, high heating cost, and equipment footprint in the assembly of magnets and shells.

[0006] To achieve the above-mentioned purpose, the heating device proposed in the present invention is used to perform high-temperature curing of glue on the inner wall of the housing during the assembly of the magnet and the motor housing, comprising:

[0007] A strip heating coil assembly, wherein two ends of the strip heating coil assembly are bent to form an inlet and an outlet;

[0008] At least one fixed rotating seat is arranged to move along the extension direction of the strip-shaped heating coil assembly, and the fixed rotating seat can rotate around its own axis while moving;

[0009] The upper part of the fixed rotating seat is inserted into the strip heating coil assembly, the magnet is adsorbed on the strong magnet on the upper part, and the outer shell is sleeved on the upper part and wraps the magnet.

[0010] Optionally, it also includes a first driving mechanism for driving the fixed rotating seat to move along the extension direction of the strip heating coil assembly.

[0011] Optionally, the first driving mechanism includes a frame, a turntable of a cam divider arranged on the frame, and a turntable arranged on the cam divider; the strip heating coil assembly is located above the turntable and extends around the circumference of the turntable; the fixed rotating seat is evenly arranged on the outer peripheral edge of the turntable.

[0012] Optionally, a second driving mechanism for driving the fixed rotating seat to rotate around its own axis is provided below the turntable.

[0013] Optionally, the second driving mechanism includes three evenly distributed synchronous belt drive assemblies arranged along the circumference of the turntable, the synchronous belt drive assembly has an arc-shaped plate, the synchronous belt of the synchronous belt drive assembly is arranged along the outer arc surface of the arc-shaped plate and is in transmission contact with the fixed rotating seat.

[0014] Optionally, the synchronous belt drive assembly includes a bracket, which is fixed to the frame via a mounting plate; the arc plate is arranged on the bracket, a synchronous pulley group is arranged on the arc plate, and the synchronous belt is wound around the arc plate and the synchronous pulley group; a driving motor is arranged on the bracket and is transmission-connected to the synchronous pulley group.

[0015] Optionally, the fixed rotating seat comprises:

[0016] A fixing seat fixed to the outer peripheral edge of the rotating disk;

[0017] A rotating seat coaxially movably plugged into the fixed seat, a supporting seat is arranged on the upper part of the rotating seat, the upper part of the supporting seat has a bayonet, and the two end openings of the bayonet are respectively provided with expansion seats, the strong magnet is arranged on the outer wall of the expansion seat, the magnet of the motor is adsorbed on the expansion seat through the strong magnet, and the outer shell of the motor is sleeved on the upper part of the supporting seat [A2] and wraps the magnet;

[0018] And a lifting shaft coaxially movably plugged into the rotating seat, a trapezoidal slide is arranged on the upper end of the lifting shaft; the trapezoidal slide is inserted into the bayonet, the expansion seat is slidably matched with the inclined surface of the trapezoidal slide, and when the lifting shaft moves relative to the rotating seat, the two expansion seats are driven to expand outward to press the magnet onto the inner wall of the shell.

[0019] Optionally, a gear portion is provided on the upper portion of the rotating seat; a carrier plate is provided above the turntable, and a plurality of gear drive assemblies arranged side by side are provided on the carrier plate, and a transmission gear is provided on one side of the gear drive assembly close to the outer peripheral edge of the turntable, and when the fixed rotating seat rotates to the position of the gear drive assembly with the turntable, the gear portion of the rotating seat meshes with the transmission gear for transmission.

[0020] Optionally, the gear drive assembly is slidably disposed on the carrier plate, and can be relatively close to the outer peripheral edge of the turntable to engage with the rotating seat of the fixed rotating seat for transmission, or away from the outer peripheral edge of the turntable to avoid the fixed rotating seat.

[0021] Optionally, the heating coil assembly includes a first heating coil and a second heating coil stacked at an interval, and the upper part of the fixed rotating seat passes through the first heating coil and the second heating coil in sequence, so that the outer shell sleeved on the upper part of the fixed rotating seat is inside the first heating coil and the second heating coil.

[0022] The heating device provided by the present invention is provided by setting a strip heating coil assembly, and bending the two ends of the strip heating coil assembly to form an inlet and an outlet; at the same time, at least one fixed rotating seat is provided which is movable along the extension direction of the strip heating coil assembly and can rotate, and the upper part of the fixed rotating seat is inserted into the strip heating coil assembly.

[0023] Therefore, after the motor casing and the magnet are set on the fixed rotating seat, the fixed rotating seat can be directly sent into the strip heating coil assembly from the entrance of the strip heating coil assembly for heating, and the heated fixed rotating seat can be sent in from the exit of the strip heating coil assembly in sequence, which greatly shortens the time for sending the fixed rotating seat in and out of the strip heating coil assembly, saves the transfer time of the fixed rotating seat, and can heat multiple fixed rotating seats, greatly improving the curing efficiency of the glue and improving the assembly efficiency of the magnet and the casing.

[0024] At the same time, when the fixed rotating seat is moved along the extension direction of the strip heating coil assembly, the fixed rotating seat is also driven to rotate, so that the glue and magnet on the inner wall of the shell can be evenly heated, avoiding the problem of cracking of the magnet caused by uneven heating in the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment of a heating device of the present invention;

[0026] Figure 2 It is an exploded schematic diagram of a frame part in an embodiment of a heating device of the present invention;

[0027] Figure 3It is a structural schematic diagram of a synchronous belt drive assembly in an embodiment of a heating device of the present invention;

[0028] Figure 4 It is a structural schematic diagram of a strip heating coil assembly in one embodiment of a heating device of the present invention;

[0029] Figure 5 It is a structural schematic diagram of a fixed rotating seat in an embodiment of a heating device of the present invention;

[0030] Figure 6 It is a cross-sectional view of a fixed rotating seat in one embodiment of the heating device of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Please refer to the instruction manual Figure 1 In an embodiment of the present invention, a heating device is proposed, which is used to perform high-temperature curing of glue on the inner wall of the outer shell during the assembly of the magnet and the motor shell. Specifically, the heating device includes a strip heating coil assembly 100 and a plurality of fixed rotating seats 200. Both ends of the strip heating coil assembly 100 are bent to form an inlet (110a, 120a) and an outlet. The fixed rotating seat 200 is configured to be movably arranged along the extension direction of the strip heating coil assembly 100, and can rotate around its own axial direction, and its upper part is inserted into the strip heating coil assembly 100.

[0033] Before heating, the magnet and the shell of the motor are first set on the fixed rotating seat 200. During heating, the fixed rotating seat 200 is moved along the extension direction of the strip heating coil assembly 100, and the fixed rotating seat 200 is moved into the strip heating coil assembly 100 from the entrance (110a, 120a) of the strip heating coil assembly 100, and the fixed rotating seat 200 is rotated while the fixed rotating seat 200 is moved, thereby uniformly heating the product (i.e., the shell, glue and magnet) set on the fixed rotating seat 200 during the movement of the fixed rotating seat 200; the speed of the fixed rotating seat 200 moving and rotating in the strip heating coil assembly 100 is controlled according to the temperature and length of the strip heating coil assembly 100, so that the glue on the inner wall of the shell is completely cured when the fixed rotating seat 200 is sent into the strip heating coil assembly 100.

[0034] Compared with the existing method of using a high-frequency heating electric box to heat and cure the glue on the inner wall of the outer shell, the present invention arranges a strip heating coil assembly 100 above the fixed rotating seat 200, and bends the two ends of the strip heating coil assembly 100 to form an inlet and an outlet. At the same time, at least one fixed rotating seat 200 is moved and arranged along the extension direction of the strip heating coil assembly 100. Therefore, after the motor shell and the magnet are arranged on the fixed rotating seat 200, the fixed rotating seat 200 can be directly sent into the strip heating coil assembly 100 from the inlet (110a, 120a) of the strip heating coil assembly 100 for heating, and the heated fixed rotating seat 200 can be sent in from the outlet of the strip heating coil assembly 100, which greatly shortens the time for sending the fixed rotating seat 200 in and out of the strip heating coil assembly 100, saves the transfer time of the fixed rotating seat 200, and can achieve heating of multiple fixed rotating seats 200, greatly improving the curing efficiency of the glue and improving the assembly efficiency of the magnet and the outer shell.

[0035] At the same time, the fixed rotating seat 200 also adopts a self-rotating design. When the fixed rotating seat 200 is moved along the extension direction of the strip heating coil assembly 100, the fixed rotating seat 200 is also driven to rotate, so that the glue and magnet on the inner wall of the outer shell can be evenly heated, avoiding the problem of cracking of the magnet caused by uneven heating in the outer shell.

[0036] For ease of understanding, the heating device is further described below in conjunction with specific examples.

[0037] like Figure 1-2 As shown, the heating device includes a frame 310, a cam divider 320 is arranged on the frame 310, a turntable 330 is arranged on the cam divider 320, and a fixed rotating seat 200 is evenly arranged on the outer peripheral edge of the turntable 330. The strip heating coil assembly 100 is located above the turntable 330 and extends around the circumference of the turntable 330.

[0038] Three synchronous belt drive assemblies 340 are evenly distributed along the circumference of the turntable 330 below the turntable 330. Each synchronous belt drive assembly 340 includes a bracket 341, an arc plate 343, a synchronous belt pulley set (not shown), a synchronous belt 344, and a driving motor 342. The bracket 341 is fixed to the circumference of the frame 310 through the mounting plate 311. The arc plate 343 and the driving motor 342 are both arranged on the bracket 341. The synchronous belt pulley set is arranged along the inner edge of the arc plate 343. The driving motor 342 is connected to a synchronous belt pulley in the synchronous belt pulley set through a reducer. The synchronous belt 344 is wound around the outer peripheral edge of the arc plate 343 and contacts the synchronous belt pulley set on the inner edge of the arc plate 343.

[0039] The fixed rotating seat 200 includes a fixed seat 210, a rotating seat 220 and a lifting shaft 230. The fixed seat 210 is fixed to the outer peripheral edge of the turntable 330 by screws, and two bearings 211 are arranged on the inner periphery thereof, and a first spacing ring 212 is arranged between the two bearings 211 to support the inner rings of the two bearings 211. The lower part of the rotating seat 220 is inserted into the inner ring of the bearing 211 and passes through the fixed seat 210, and a synchronous pulley 221 is sleeved on the lower part of the rotating seat 220, and the synchronous pulley 221 contacts the synchronous belt 344 outside the arc plate 343. A second spacing ring 224 is arranged between the synchronous pulley 221 and the fixed seat 210 to support the inner ring of the bearing 211 located at the lower part of the fixed seat 210. A locking nut 223 is sleeved on the lower end of the rotating seat 220 to lock the rotating seat 220 in the axial direction.

[0040] A support seat 240 is arranged on the upper part of the rotating seat 220. The upper part of the support seat 240 has a bayonet, and expansion seats 241 are respectively arranged at the openings at both ends of the bayonet. A strong magnet 2411 is arranged on the outer wall of the expansion seat 241. The magnet of the motor is adsorbed on the expansion seat 241 through the strong magnet 2411, and the outer shell of the motor is sleeved on the upper part of the support seat 240 and wraps the magnet.

[0041] The lifting shaft 230 is coaxially slidably inserted on the rotating seat 220, and a trapezoidal slide 231 is provided at the upper end of the lifting shaft 230. The trapezoidal slide 231 is inserted into the bayonet, and the inclined surfaces on both sides thereof are slidably engaged with the expansion seat 241 through dovetail grooves and dovetail-shaped protrusions. When the lifting shaft 230 is lifted upward along its axial direction by an external force, the two expansion seats 241 can be driven to contract inward so that the outer shell can cover the magnet.

[0042] Before heating, the magnet is adsorbed on the outer wall of the expansion seat 241; then an upward force is applied to the lifting shaft 230 to drive the trapezoidal slide 231 to move upward, causing the two expansion seats 241 to shrink toward each other, and then the outer shell is pressed into the upper part of the support seat 240 and wraps the magnet. At the same time, the external force applied to the lifting shaft 230 is removed, so that the expansion seat 241 expands outward, and the outer peripheral wall of the magnet is pressed onto the glue on the inner wall of the outer shell, preparing for the next step of entering high-frequency heating to solidify the glue.

[0043] During heating, the turntable 330 is driven to rotate by the cam divider 320, driving the fixed rotating seat 200 to revolve around the center of the turntable 330, so that the fixed rotating seat 200 on the outer peripheral edge of the turntable 330 enters the strip heating coil assembly 100 from the entrance (110a, 120a) of the strip heating coil assembly 100 in sequence; when the fixed rotating seat 200 enters the strip heating coil assembly 100, the rotating seat 220 of the fixed rotating seat 200 is driven to rotate by the synchronous belt driving assembly 340, driving the outer shell on the supporting seat 240 to rotate in the strip heating coil assembly 100.

[0044] In this way, the fixed rotating seat 200 is moved along the extension direction of the strip heating coil assembly 100, which greatly saves the transfer time from the fixed rotating seat 200 to the high-frequency heating process; and, in the process of moving the fixed rotating seat 200, the synchronous belt drive assembly 340 can also drive the fixed rotating seat to rotate, so that the glue and magnet on the inner wall of the outer shell can be evenly heated, avoiding the problem of cracking of the magnet due to uneven heating in the outer shell.

[0045] As a further feature, a heat insulating sleeve 250 is provided between the support seat 240 and the rotating seat 220. The heat insulating sleeve 250 is fixed to the upper portion of the rotating seat 220, and the support seat 240 is fixed to the upper portion of the heat insulating sleeve 250. The heat insulating sleeve 250 is provided to suppress heat transfer between the outer support seat 240 and the rotating seat 220.

[0046] As a further feature, a fixing ring 222 is embedded in the inner periphery of the lower end of the rotating seat 220, and the lower end of the lifting shaft 230 passes through the fixing ring 222 and slides with the fixing ring 222. By providing the fixing ring 222, the lifting shaft 230300 is contacted with the inner wall of the rotating seat 220 at intervals.

[0047] As a further feature, a truncated cone portion 230a is provided on the shaft body of the lifting shaft 230, and a return spring 232 is provided between the truncated cone portion 230a and the support seat 240. Thus, when the lifting force applied to the lifting shaft 230 is removed, the lifting shaft 230 can be driven to reset by the return spring 232, so that the two expansion seats 241 expand again, thereby fully contacting the magnet with the glue on the inner wall of the housing.

[0048] It should be noted that the heating device may adopt other structures besides the above structure. For example, the strip heating coil assembly 100 is arranged in a straight line or a curved line, and a synchronous belt 344 is arranged along the extension direction of the strip heating coil assembly 100, so that after the fixed rotating seat 200 is moved into the strip heating coil assembly 100, the fixed rotating seat 200 can be driven by the synchronous belt 344 to move along the strip heating coil assembly 100 and rotate during the movement.

[0049] The above-mentioned synchronous belt can also be replaced by other flexible transmission parts, such as belts, chains, etc. Correspondingly, the synchronous pulley 221 on the fixed rotating seat 200 is replaced by a friction wheel, a sprocket, etc.

[0050] In addition, the synchronous belt can replace its rigid transmission member such as a rack, and correspondingly, the synchronous pulley 221 on the fixed rotating seat 200 needs to be replaced with a gear. Compared with the use of flexible transmission members, the use of rigid transmission members requires the provision of other drive mechanisms to drive the fixed rotating seat 200 to move.

[0051] In the embodiment of the present invention, a gear part 220a is provided on the upper part of the rotating seat 220, and the supporting seat 240 is fixed on the gear part 220a together with the heat insulation sleeve 250. A carrier plate 410 is provided above the turntable 330, and a plurality of gear drive assemblies 400 arranged side by side are provided on the carrier plate 410. A transmission gear is provided on one side of the gear drive assembly 400 close to the outer peripheral edge of the turntable 330. When the fixed rotating seat 200 rotates with the turntable 330 to the position of the gear drive assembly 400, the gear part 220a of the rotating seat 220 meshes with the transmission gear for transmission.

[0052] The synchronous belt drive assembly 340 is not arranged below the corresponding gear drive assembly 400. When the fixed rotating seat 200 rotates to the position of the gear drive assembly 400 along with the turntable 330, the rotating seat 220 is driven to rotate through the transmission gear to adjust the rotation angle of the fixed rotating seat 200, so as to facilitate the magnetization and shell pressing work at the corresponding position of the gear drive assembly 400.

[0053] As a further feature, the gear drive assembly 400 is slidably disposed on the carrier plate 410, and a cylinder (not shown) is disposed on the carrier plate 410 to drive the gear drive assembly 400 to slide. Thus, the gear drive assembly 400 can be relatively close to the outer peripheral edge of the turntable 330 to mesh with the rotating seat 220 of the fixed rotating seat 200 for transmission, or away from the outer peripheral edge of the turntable 330 to avoid the fixed rotating seat 200. In this way, the gear drive assembly 400 can be driven to retract when the rotation angle of the fixed rotating seat 200 is adjusted, avoiding interference with the magnetization and the pressing of the housing.

[0054] Optionally, in an embodiment of the present invention, the heating coil assembly includes two first heating coils 110 and second heating coils 120 stacked at intervals, and the upper portion of the fixed rotating seat 200 sequentially passes through the first heating coil 110 and the second heating coil 120, so that the outer shell sleeved on the upper portion of the fixed rotating seat 200 is inside the first heating coil 110 and the second heating coil 120. By heating the outer shells of the two stacked first heating coils 110 and the second heating coil 120, the heating efficiency of the glue on the inner wall of the outer shell can be improved.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to be construed as limiting the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A heating device for high temperature curing of glue on the inner wall of a motor housing during assembly of a magnet and a motor housing, characterized in that: include: A strip heating coil assembly, wherein two ends of the strip heating coil assembly are bent to form an inlet and an outlet; At least one fixed rotating seat is arranged to move along the extension direction of the strip-shaped heating coil assembly, and the fixed rotating seat can rotate around its own axis while moving; The upper part of the fixed rotating seat is inserted into the strip heating coil assembly, the magnet is adsorbed on the strong magnet on the upper part, and the outer shell is sleeved on the upper part and wraps the magnet; The heating device also includes a first driving mechanism for driving the fixed rotating seat to move along the extending direction of the strip-shaped heating coil assembly; The first driving mechanism comprises a frame, a cam divider arranged on the frame, and a turntable arranged on the cam divider; the strip heating coil assembly is located above the turntable and extends around the circumference of the turntable; The fixed rotating seats are evenly arranged on the outer peripheral edge of the rotating disk; The fixed rotating seat comprises: A fixing seat fixed to the outer peripheral edge of the rotating disk; A rotating seat coaxially movably plugged into the fixed seat, a supporting seat is arranged on the upper part of the rotating seat, the upper part of the supporting seat has a bayonet, and the openings at both ends of the bayonet are respectively provided with expansion seats, the strong magnet is arranged on the outer side wall of the expansion seat, the magnet of the motor is adsorbed on the expansion seat through the strong magnet, and the outer shell of the motor is sleeved on the upper part of the supporting seat and wraps the magnet; And a lifting shaft coaxially movably plugged into the rotating seat, a trapezoidal slide is arranged on the upper end of the lifting shaft; the trapezoidal slide is inserted into the bayonet, the expansion seat is slidably matched with the inclined surface of the trapezoidal slide, and when the lifting shaft moves relative to the rotating seat, the two expansion seats are driven to expand outward to press the magnet onto the inner wall of the shell.

2. The heating device according to claim 1, characterized in that A second driving mechanism for driving the fixed rotating seat to rotate around its own axis is arranged below the rotating disk.

3. The heating device according to claim 2, characterized in that The second driving mechanism includes three evenly distributed synchronous belt drive components arranged along the circumference of the turntable, the synchronous belt drive component has an arc plate, the synchronous belt of the synchronous belt drive component is arranged along the outer arc surface of the arc plate and is in transmission contact with the fixed rotating seat.

4. The heating device according to claim 3, characterized in that The synchronous belt drive assembly includes a bracket, which is fixed to the frame through a mounting plate; the arc plate is arranged on the bracket, a synchronous pulley group is arranged on the arc plate, and the synchronous belt is wound around the arc plate and the synchronous pulley group; a driving motor is arranged on the bracket and is transmission-connected to the synchronous pulley group.

5. The heating device according to claim 1, characterized in that A gear part is arranged on the upper part of the rotating seat; A carrier plate is arranged above the turntable, and a plurality of gear drive assemblies arranged side by side are arranged on the carrier plate. A transmission gear is arranged on one side of the gear drive assembly close to the outer peripheral edge of the turntable. When the fixed rotating seat rotates to the position of the gear drive assembly with the turntable, the gear part of the rotating seat meshes with the transmission gear for transmission.

6. The heating device according to claim 5, characterized in that The gear drive assembly is slidably disposed on the carrier plate, and can be relatively close to the outer peripheral edge of the turntable to engage with the rotating seat of the fixed rotating seat for transmission, or away from the outer peripheral edge of the turntable to avoid the fixed rotating seat.

7. The heating device according to any one of claims 1 to 6, characterized in that: The heating coil assembly includes a first heating coil and a second heating coil stacked at an interval, and the upper part of the fixed rotating seat passes through the first heating coil and the second heating coil in sequence, so that the outer shell sleeved on the upper part of the fixed rotating seat is inside the first heating coil and the second heating coil.

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