A kind of load-reducing asynchronous motor

Abstract

The present invention discloses a load-reducing asynchronous motor, which is characterized in that it comprises an outer shell, a front end cover, a rear end cover, a rotating shaft, a stator, a plug-in linkage mechanism, and a rear end cover driving mechanism; the present invention adopts a tooth plate bite mode for linkage, and controls the minimum spacing of the rotating gap to be greater than the thickness of the inner shifting tooth plate, so that the inner shifting tooth plate has a certain rotation space in the rotating gap, so that when the rotating shaft is worn, the position of the inner shifting tooth plate is slightly offset, and because the spacing of the rotating gap is relatively large, the inner shifting tooth plate with a slightly offset position can still be inserted into the rotating gap, so that the structure has stronger anti-variability.

Description

Technical Field

[0001] The invention relates to a load-reducing asynchronous motor. Background Art

[0002] An asynchronous motor is a type of induction motor that is powered by a 380V AC current. Because the rotor and stator rotating magnetic fields of a three-phase asynchronous motor rotate in the same direction but at different speeds, there is a slip, so it is called a three-phase asynchronous motor. The speed of the rotor of a three-phase asynchronous motor is lower than the speed of the rotating magnetic field. The rotor winding generates an electromotive force and current due to the relative motion between the rotor winding and the magnetic field, and interacts with the magnetic field to generate electromagnetic torque, realizing energy conversion. In order to facilitate heat dissipation, existing motors have cooling blades installed at the rear end of the rotating shaft. When the rotating shaft rotates, it drives the cooling blades to rotate together, so the rotating shaft will always load the cooling blades to rotate. However, when the load on the rotating shaft is small and the heating conditions are good, the cooling blades are not needed for blowing air to dissipate heat. In this case, the rotating shaft still drives the cooling blades to rotate, which is actually an additional load, increasing the load on the motor. Therefore, it is necessary to develop an electric motor that can open and close the cooling blades according to actual needs. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention solves the problem of providing an electric motor with a strong structural resistance to variability and capable of opening and closing the heat dissipation blades according to actual needs.

[0004] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0005] The cam is secured to the rear of the drive shaft and is secured to the camshaft at the rear of the drive shaft with respect to the stator, the cam being secured to the rear of the drive shaft with respect to the stator. The cam is secured to the rear of the drive shaft and is adapted to engage the outer cover of the drive shaft to engage with the drive gear of the drive gear when the cam is engaged with the drive gear of the drive gear.

[0006] Furthermore, the outer end of the rotating block is provided with a rotating engaging tooth; the inner center of the rear end cover is provided with a rotating engaging groove; the rotating block is rotatably engaged with the rotating engaging groove at the inner center of the rear end cover through the rotating engaging tooth at the outer end.

[0007] Furthermore, an adjustment groove is provided on the outside of the rotation clamping groove at the inner center of the rear end cover; a driving handle is provided on the outside of the rotation clamping teeth; and the driving handle is located in the adjustment groove.

[0008] Furthermore, the rear end cover driving mechanism includes a threaded barrel, a driving screw, and a positioning block; a threaded barrel is installed on the upper and lower sides of the sleeve ring body of the rear end cover; a driving screw is threadedly connected in the threaded barrel; a positioning block is installed on the upper and lower sides of the rear end of the outer shell; the driving screw is rotatably clamped on the positioning block.

[0009] Furthermore, a plurality of evenly distributed heat dissipation ventilation grooves are provided inside the outer shell; one end of the heat dissipation ventilation groove extends to the outer side surface of the front end of the outer shell, and the other end of the heat dissipation ventilation groove extends to the inner side surface of the rear end of the outer shell.

[0010] Furthermore, an annular gap is provided around the inner side of the stator and around the outer side of the cage rotor.

[0011] Beneficial effects of the present invention

[0012] 1. The present invention changes the traditional fixed connection structure between the rear end cover and the outer shell, and instead slides the rear end cover onto the inner core ring body around the outer rear end of the outer shell through the sleeve ring body around the inner end. In addition, the present invention changes the heat dissipation blades from being fixed on the rotating shaft to being rotatably connected to the inside of the rear end cover. At the same time, a porous plate for mounting the rear end of the rotating shaft is added to the rear end of the outer shell. In this way, when the rear end cover slides on the rear end of the outer shell, the rotation gap of the outer shifting tooth plate is driven to be sleeved or separated and connected to the inner shifting tooth plate. In this way, whether the heat dissipation blades are linked to the rotating shaft can be determined according to actual conditions.

[0013] 2. When the rear end cover of the present invention slides at the rear end of the outer shell, it will first drive the rotating block, the heat dissipation blades, the outer coupling ring, and the outer toggle gear plate to move forward until the inner end of the outer toggle gear plate contacts the outer end of the inner toggle gear plate, and then the driving handle is rotated to drive the rotating block, the outer coupling ring, and the outer toggle gear plate to rotate, so that the rotation gap of the outer toggle gear plate is aligned with the inner toggle gear plate, and then the rear end cover is driven to slide at the rear end of the outer shell again, thereby forming an interlocking connection structure of the outer toggle gear plate and the inner toggle gear plate, thereby realizing the linkage between the rotating shaft, the rotating block, and the heat dissipation blades.

[0014] 3. The present invention adopts the tooth plate bite mode to realize linkage, and controls the minimum spacing of the rotation gap to be larger than the thickness of the inner shifting tooth plate, so that the inner shifting tooth plate has a certain rotation space within the rotation gap. In this way, when the rotating shaft is worn, the position of the inner shifting tooth plate will be slightly offset. Since the spacing of the rotation gap is relatively large, the inner shifting tooth plate with a slightly offset position can still be inserted into the rotation gap, so that the structure has stronger anti-variability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure in which the rotating block and the rotating shaft are separated according to the present invention.

[0017] Figure 3 It is a structural schematic diagram of the docking of the rotating block and the rotating shaft of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the inner core block, inner shifting tooth plate, outer connecting ring and outer shifting tooth plate after being plugged in according to the present invention.

[0019] Figure 5 For the present invention Figure 4 Schematic diagram of the structure of the meshing transmission. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the accompanying drawings.

[0021] like Figures 1 to 5 As shown, a load-reducing asynchronous motor includes an outer shell 1, a front cover 5, a rear cover 6, a rotating shaft 2, a stator 4, a plug-in linkage mechanism 7, and a rear cover driving mechanism 3; the front end of the outer shell 1 is fixedly mounted with the front cover 5; the stator 4 is mounted on the inner periphery of the outer shell 1; the rotating shaft 2 is connected to the inner axis of the outer shell 1; a cage rotor 13 is provided on the outer periphery of the rotating shaft 2, and the cage rotor 13 is located coaxially with the stator 4; the front end of the rotating shaft 2 passes through the front cover 5 and extends out; the rear end of the outer shell 1 A porous plate 12 is provided inside; the rear end of the rotating shaft 2 is connected to the center of the porous plate 12 and extends out; the two ends of the rotating shaft 2 are respectively rotatably provided with connecting rings 21; the connecting rings 21 are respectively fixedly mounted on the inner center of the front end cover 5 and the inner center of the porous plate 12; the rear end cover 6 is provided with a vent opening 62 around it; the inner end of the rear end cover 6 is provided with a sleeve ring 61 around it; the outer side of the rear end of the outer shell 1 is provided with an inner core ring 14; the rear end cover 6 is slidably sleeved on the outer shell 1 through the sleeve ring 61 around the inner end On the inner core ring body 14 on the outer side around the rear end; a rear end cover driving mechanism 3 is respectively installed on the upper and lower sides of the outer shell 1 and the rear end cover 6; the rear end cover driving mechanism 3 drives the sleeve ring body 61 to slide on the outer side of the inner core ring body 14; the plug-in linkage mechanism 7 includes an inner core block 71, an inner toggle gear plate 73, an outer sleeve ring 72, an outer toggle gear plate 78, a rotating block 74, and a heat dissipation blade 77; the rear end of the rotating shaft 2 is installed with an inner core block 71; a plurality of inner toggle gear plates 73 are evenly installed on the outer radial side of the inner core block 71; the rotating The outer end of the block 74 is rotatably engaged with the inner center of the rear end cover 6; a plurality of heat dissipation blades 77 are evenly distributed on the outer sides of the rotating block 74; an outer sleeve ring 72 is installed on the inner end of the rotating block 74; a plurality of outer shifting gear plates 78 are evenly installed on the inner radial sides of the outer sleeve ring 72; a rotation gap 79 is provided between adjacent outer shifting gear plates 78; the minimum spacing of the rotation gap 79 is greater than the thickness of the inner shifting gear plate 73; the rotation gap 79 of the outer shifting gear plate 78 is sleeved or separately connected to the inner shifting gear plate 73.

[0022] like Figures 1 to 5As shown, further preferably, the outer end of the rotating block 74 is provided with a rotating engaging tooth 75; the inner center of the rear end cover 6 is provided with a rotating engaging groove 63; the rotating block 74 is rotatably engaged with the rotating engaging groove 63 at the inner center of the rear end cover 6 via the rotating engaging tooth 75 at the outer end. Further preferably, the outer side of the rotating engaging groove 63 at the inner center of the rear end cover 6 is connected to the adjusting groove 64; the outer side of the rotating engaging tooth 75 is provided with a driving handle 76; the driving handle 76 is located in the adjusting groove 64. Further preferably, the rear end cover driving mechanism 3 includes a threaded barrel 31, a driving screw 32, and a positioning block 33; a threaded barrel 31 is mounted on the upper and lower sides of the sleeve ring 61 of the rear end cover 6; a driving screw 32 is threadedly connected to each of the threaded barrels 31; a positioning block 33 is mounted on the upper and lower sides of the rear end of the outer shell 1; the driving screw 32 is rotatably engaged with the positioning block 33. More preferably, the outer shell 1 is provided with a plurality of evenly distributed heat dissipation vents 11; one end of each heat dissipation vent 11 extends to the outer surface of the front end of the outer shell 1, and the other end of each heat dissipation vent 11 extends to the inner surface of the rear end of the outer shell 1. Furthermore, an annular gap is provided around the inner periphery of the stator 4 and around the outer periphery of the cage rotor 13.

[0023] The present invention changes the traditional fixed connection structure between the rear end cover 6 and the outer shell 1, and instead slides the rear end cover 6 onto the inner core ring body 14 on the outside of the rear end of the outer shell 1 through the sleeve ring body 61 around the inner end. In addition, the present invention changes the heat dissipation blades 77 from being fixed on the rotating shaft 2 to being rotatably connected to the inside of the rear end cover 6, and at the same time, a porous plate 12 for installing the rear end of the rotating shaft is added to the rear end of the outer shell 1. In this way, when the rear end cover 6 slides on the rear end of the outer shell 1, it drives the rotating gap 79 of the outer shifting tooth plate 78 to be sleeved or separated and connected to the inner shifting tooth plate 73, thereby realizing whether the heat dissipation blades 77 are linked with the rotating shaft 2, so that it can be decided whether to control the heat dissipation blades to rotate according to actual conditions.

[0024] When the rear end cover 6 of the present invention slides at the rear end of the outer shell, it will first drive the rotating block 74, the heat dissipation blades 77, the outer coupling ring 72, and the outer shifting gear plate 78 to move forward until the inner end of the outer shifting gear plate 78 contacts the outer end of the inner shifting gear plate 73, and then rotate the driving handle 76 to drive the rotating block 74, the outer coupling ring 72, and the outer shifting gear plate 78 to rotate, so that the rotation gap 79 of the outer shifting gear plate 78 is aligned with the inner shifting gear plate 73, and then drive the rear end cover 6 to slide at the rear end of the outer shell 1 again, thereby forming an interlocking connection structure between the outer shifting gear plate 78 and the inner shifting gear plate 73, thereby realizing the linkage between the rotating shaft 2, the rotating block 74 and the heat dissipation blades 77.

[0025] The present invention adopts the tooth plate bite mode for linkage, and controls the minimum spacing of the rotating gap 79 to be greater than the thickness of the inner shifting tooth plate 73, so that the inner shifting tooth plate 73 has a certain rotation space in the rotating gap 79. In this way, when the rotating shaft 2 is worn, the position of the inner shifting tooth plate 73 is slightly offset. Since the spacing of the rotating gap 79 is relatively large, the inner shifting tooth plate 73 with a slightly offset position can still be inserted into the rotating gap 79, so that the structure has stronger anti-variability.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A load-reducing asynchronous motor, characterized in that: It includes an outer shell, a front cover, a rear cover, a rotating shaft, a stator, a plug-in linkage mechanism, and a rear cover driving mechanism; the front cover is fixedly installed at the front end of the outer shell; the stator is installed around the inner periphery of the outer shell; the rotating shaft is connected to the inner axis of the outer shell; a cage rotor is arranged on the outer periphery of the rotating shaft, and the cage rotor is located coaxially inside the stator; the front end of the rotating shaft passes through the front cover and extends out; a porous plate is arranged inside the rear end of the outer shell; the rear end of the rotating shaft is connected to the center of the porous plate and extends out; connecting rings are rotatably arranged at both ends of the rotating shaft; the connecting rings are fixedly installed at the front end The inner center of the cover and the inner center of the porous plate; the rear end cover is provided with ventilation openings around; the inner end of the rear end cover is provided with a sleeve ring body around; the outer rear end of the outer shell is provided with an inner core ring body around the outer side; the rear end cover is slidably sleeved on the inner core ring body around the outer rear end of the outer shell through the sleeve ring body around the inner end; a rear end cover driving mechanism is respectively installed on the upper and lower sides of the outer shell and the rear end cover; the rear end cover driving mechanism drives the sleeve ring body to slide on the outer side of the inner core ring body; the plug-in linkage mechanism includes an inner core block, an inner toggle tooth plate, an outer sleeve ring, an outer toggle tooth plate, a rotating block, and a heat dissipation blade; the rear end of the rotating shaft is installed Inner core block; multiple inner toggle tooth plates are evenly installed around the outer radial periphery of the inner core block; the outer end of the rotating block is rotatably clamped to the inner center of the rear end cover; multiple heat dissipation blades are evenly distributed around the outer side of the rotating block; an outer sleeve ring is installed on the inner end of the rotating block; multiple outer toggle tooth plates are evenly installed around the inner radial periphery of the outer sleeve ring; rotation gaps are provided between adjacent outer toggle tooth plates; the minimum spacing of the rotation gaps is greater than the thickness of the inner toggle tooth plates; the rotation gaps of the outer toggle tooth plates are sleeved or separated and connected to the inner toggle tooth plates; the outer end of the rotating block is provided with rotation clamping teeth; the inner side of the rear end cover A rotating clamping groove is provided in the center; the rotating block is rotatably clamped to the rotating clamping groove at the inner center of the rear end cover through the rotating clamping teeth at the outer end; an adjusting groove is connected to the outer side of the rotating clamping groove at the inner center of the rear end cover; a driving handle is provided on the outer side of the rotating clamping teeth; the driving handle is located in the adjusting groove; the rear end cover driving mechanism includes a threaded barrel, a driving screw and a positioning block; a threaded barrel is respectively installed on the upper and lower sides of the sleeve ring body of the rear end cover; a driving screw is respectively threadedly connected in the threaded barrel; a positioning block is respectively installed on the upper and lower sides of the rear end of the outer shell; the driving screw is rotatably clamped on the positioning block.

2. The load-reduced asynchronous motor according to claim 1, characterized in that: The interior of the outer shell is provided with a plurality of evenly distributed heat dissipation ventilation grooves; one end of the heat dissipation ventilation groove extends to the outer side surface of the front end of the outer shell, and the other end of the heat dissipation ventilation groove extends to the inner side surface of the rear end of the outer shell.

3. The load-reduced asynchronous motor according to claim 1, characterized in that: An annular gap is arranged around the inner side of the stator and around the outer side of the cage rotor.

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