Rotor rotating speed detection mechanism of permanent magnet synchronous motor

Abstract

The utility model discloses a permanent magnet synchronous motor rotor rotating speed detection mechanism, which is characterized in that the permanent magnet synchronous motor rotor rotating speed detection mechanism comprises a body mechanism, the outer end of the body mechanism is sleeved with a detection assembly, the rear end of the body mechanism is provided with a protection mechanism, the detection assembly comprises a conduction ring, the upper end of the conduction ring is movably connected with a transmission rod, and the upper end of the transmission rod is movably connected with a motor. A rotating shaft is rotatably connected to the inner end of the transmission rod, a rotating speed detector body is fixedly connected to the rear end of the rotating shaft, a transmission wheel is fixedly connected to the front end of the rotating shaft, and a rotating speed detector is arranged to be matched with a detachable conduction ring to be arranged outside the rotor assembly in a sleeving mode, so that the device can achieve more convenient and visual rotating speed detection; maintenance and disassembly are convenient; the rotating guide transmission wheel and the rotating speed detector body are guided through the sliding groove, so that the rotating speed detector body is more stable in the rotor assembly detection process and does not deviate or fall off. And a buffer frame is arranged, so that the device is more stable during rotating speed detection.

Description

Technical Field

[0001] The utility model relates to the field of rotation speed detection, in particular to a permanent magnet synchronous motor rotor rotation speed detection mechanism. Background Art

[0002] Permanent magnet synchronous motors mainly use permanent magnets to provide excitation, which means that permanent magnet synchronous motors can save a series of links such as collector rings and brushes that are prone to problems in traditional motors, which makes permanent magnet synchronous motors popular among users;

[0003] Chinese patent authorization application number: CN201220512768.3 provides a motor speed detection device, which processes the rotor position signal through a speed signal generating circuit to obtain a speed signal, thereby achieving the purpose of detecting the motor speed with high precision and low cost. The utility model can be conveniently combined with a pointer-type, digital electronic tachometer with voltage and current input, and a virtual instrument such as NI's LabVIEW to form a complete tachometer, or directly sent to a motor speed controller, PLC and other control devices for related control purposes.

[0004] The existing rotor speed detection mechanism has certain drawbacks when in use. First of all, the rotor speed detection mechanism is mostly a plurality of detection structures arranged in one body when in use. When the rotor speed detection mechanism is damaged, the damage of the rotor speed detection mechanism cannot be observed intuitively, and disassembly and maintenance are also inconvenient, which affects the detection effect and practicality of the rotor speed detection mechanism. For this reason, we propose a permanent magnet synchronous motor rotor speed detection mechanism. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a permanent magnet synchronous motor rotor speed detection mechanism, by setting a conduction ring and a speed detector body, the speed detector is arranged on the outside of the rotor assembly in cooperation with a detachable conduction ring sleeve, so that the device can achieve more convenient and intuitive speed detection, and is convenient for maintenance and disassembly, and is used to solve the problems of inconvenient detection and inconvenient structural disassembly and installation; the rotating guide transmission wheel and the speed detector body are guided by a slide groove, so that the speed detector body is more stable during the detection of the rotor assembly and will not be offset and fall off; a buffer frame is set, and when the speed detector body vibrates during the detection of the running rotor assembly, the device is more stable during the speed detection; a buffer groove is set, and the buffer groove can guide the buffering buffer frame and the guide rod, so that the buffer structure of the device is more stable to use.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A permanent magnet synchronous motor rotor speed detection mechanism comprises a main body mechanism, the outer end of the main body mechanism is sleeved with a detection component, and the rear end of the main body mechanism is installed with a protection mechanism;

[0008] The detection component includes a conduction ring, the upper end of the conduction ring is movably connected to a transmission rod, the inner end of the transmission rod is rotatably connected to a rotating shaft, the rear end of the rotating shaft is fixedly connected to a speed detector body, the front end of the rotating shaft is fixedly connected to a transmission wheel, and the outer end of the transmission wheel is meshingly connected to a gear ring.

[0009] By installing the conduction ring and the speed detector body, the device can achieve more convenient and intuitive speed detection, and is easy to maintain and disassemble, thereby improving the practicality of the permanent magnet synchronous motor rotor speed detection mechanism.

[0010] Furthermore, a guide block is installed at the outer end of the rotation speed detector body, and a guide head is fixedly connected to the rear end of the guide block.

[0011] By installing the guide block, the guide block can form a connection structure at the outer end of the speed detector body, which can make the speed detector body more convenient when running and rotating.

[0012] Furthermore, a slide groove is provided at the outer end of the guide head, and the slide groove is located at the outer end of the main body mechanism.

[0013] By installing the slide groove, the speed detector body can be made more stable during the process of detecting the rotor assembly.

[0014] Furthermore, the main body mechanism comprises a receiving frame, and the inner end of the receiving frame is rotatably connected to a rotor assembly.

[0015] By installing the receiving frame, the receiving frame can make the connection between the detection component as a whole and the rotor component more stable, thereby improving the stability of the device structure in use.

[0016] Furthermore, a conduction groove is movably opened on the outer side of the rotor assembly, and a controller is installed on the outer end of the receiving frame.

[0017] By installing the controller, the controller can receive the speed information of the speed detector body, so that the device can obtain the speed information more intuitively.

[0018] Furthermore, the protection mechanism comprises a mounting frame, the rear of the receiving frame is slidably connected with the mounting frame, and the upper end of the mounting frame is fixedly connected with an assembly frame.

[0019] By setting up the installation frame, the installation frame cooperates with the assembly frame to install and assemble the device as a whole, making the installation and disassembly of the device as a whole more convenient.

[0020] Furthermore, a buffer frame is slidably connected to the lower part of the assembly frame, the outer end of the buffer frame is hingedly connected to symmetrically distributed guide rods, the bottom end of the buffer frame is fixedly connected to a damping member, and the other end of the guide rod away from the buffer frame is hingedly connected to a buffer block.

[0021] By installing a buffer bracket, the device can be made more stable when performing speed detection.

[0022] Furthermore, a buffer piece is installed at the outer end of the buffer block, and a buffer groove is formed at the outer end of the buffer piece.

[0023] By installing the buffer groove, the buffer structure of the device can be made more stable in use.

[0024] In summary, the utility model has the following beneficial effects:

[0025] 1. By setting a conduction ring and a speed detector body, the speed detector body is composed of a power supply module, a speed sensing module, an analysis module and a transmission module, and is arranged on the outside of the rotor assembly with a detachable conduction ring sleeve. When the rotor assembly is running, the transmission wheel meshes and rotates with the gear ring, and rotates together with the conduction ring, so that the device can achieve more convenient and intuitive speed detection, and is easy to maintain and disassemble, thereby improving the practicality of the permanent magnet synchronous motor rotor speed detection mechanism;

[0026] 2. By setting the slide groove, the slide groove can guide the rotating guide transmission wheel and the speed detector body, so that the speed detector body is more stable during the detection of the rotor assembly, and will not be offset or fall off, thereby improving the detection stability of the device;

[0027] 3. By setting a buffer frame, when the speed detector body generates vibration during the detection of the running rotor assembly, the buffer frame is subjected to external force for position transmission. At this time, the vibration force is buffered and suppressed by the damping member and the buffer block, making the device more stable during speed detection;

[0028] 4. By setting the buffer groove, the buffer groove can guide the buffer frame and the guide rod, so that the buffer structure of the device is more stable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0030] Figure 2 is a schematic diagram of the three-dimensional structure of the detection component in this embodiment;

[0031] Figure 3 In this embodiment Figure 1 A schematic diagram of the structure at the center showing a three-dimensional magnification;

[0032] Figure 4 is a schematic diagram of the structure of the protective mechanism in the present embodiment in a side view plane;

[0033] Figure 5 In this embodiment Figure 4 Schematic diagram of the structure enlarged on the plane at point B.

[0034] In the figure, 1. main body mechanism; 101. receiving frame; 102. rotor assembly; 103. conduction slot; 104. controller; 2. detection assembly; 201. conduction ring; 202. transmission rod; 203. rotating shaft; 204. speed detector body; 205. transmission wheel; 206. gear ring; 207. guide block; 208. guide head; 209. slide slot; 3. protection mechanism; 301. mounting frame; 302. assembly frame; 303. buffer frame; 304. guide rod; 305. damping member; 306. buffer block; 307. buffer member; 308. buffer slot. DETAILED DESCRIPTION

[0035] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0036] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0037] Reference Figure 1-5 As shown, a permanent magnet synchronous motor rotor speed detection mechanism in a preferred embodiment of the utility model comprises a main body mechanism 1, a detection assembly 2 is sleeved on the outer end of the main body mechanism 1, and a protection mechanism 3 is installed at the rear end of the main body mechanism 1;

[0038] The detection component 2 includes a conductive ring 201, the upper end of the conductive ring 201 is movably connected to a transmission rod 202, the inner end of the transmission rod 202 is rotatably connected to a rotating shaft 203, the rear end of the rotating shaft 203 is fixedly connected to a speed detector body 204, the front end of the rotating shaft 203 is fixedly connected to a transmission wheel 205, and the outer end of the transmission wheel 205 is meshingly connected to a gear ring 206.

[0039] Reference Figure 2-3 As shown, a guide block 207 is installed at the outer end of the rotation speed detector body 204 , and a guide head 208 is fixedly connected to the rear end of the guide block 207 .

[0040] Reference Figure 3 As shown, a slide groove 209 is provided at the outer end of the guide head 208 , and the slide groove 209 is located at the outer end of the main body mechanism 1 .

[0041] By installing the conductive ring 201 and the speed detector body 204, the speed detector body 204 is composed of a power supply module, a speed sensing module, an analysis module and a transmission module, and is sleeved on the outside of the rotor assembly 102 with the detachable conductive ring 201. When the rotor assembly 102 is running, the transmission wheel 205 meshes and rotates with the gear ring 206, and rotates together with the conductive ring 201. The slide groove 209 can guide the rotating guided transmission wheel 205 and the speed detector body 204, so that the speed detector body 204 is more stable during the detection of the rotor assembly 102, and will not be offset or fall off, so that the device can achieve more convenient and intuitive speed detection, and is convenient to maintain and disassemble, thereby improving the practicality of the permanent magnet synchronous motor rotor speed detection mechanism.

[0042] Reference Figure 1 As shown, the main body mechanism 1 includes a receiving frame 101 , and the inner end of the receiving frame 101 is rotatably connected to a rotor assembly 102 .

[0043] Reference Figure 1 As shown, a conducting slot 103 is movably opened on the outer side of the rotor assembly 102 , and a controller 104 is installed on the outer end of the receiving frame 101 .

[0044] By installing the receiving frame 101, the receiving frame 101 can make the connection between the detection component 2 as a whole and the rotor component 102 more stable, thereby improving the stability of the device structure in use.

[0045] Reference Figure 4-5 As shown, the protection mechanism 3 includes a mounting frame 301 , the mounting frame 301 is slidably connected to the rear of the receiving frame 101 , and the upper end of the mounting frame 301 is fixedly connected to the assembly frame 302 .

[0046] Reference Figure 5 As shown, a buffer frame 303 is slidably connected to the lower part of the assembly frame 302, and the outer end of the buffer frame 303 is hingedly connected to symmetrically distributed guide rods 304, the bottom end of the buffer frame 303 is fixedly connected to a damping member 305, and the other end of the guide rod 304 away from the buffer frame 303 is hingedly connected to a buffer block 306.

[0047] Reference Figure 4-5 As shown, a buffer member 307 is installed at the outer end of the buffer block 306 , and a buffer groove 308 is formed at the outer end of the buffer member 307 .

[0048] By installing the buffer frame 303, when the speed detector body 204 generates vibration during the detection of the running rotor assembly 102, the buffer frame 303 is subjected to external force for position transmission, and the buffer groove 308 can guide the buffer frame 303 and the guide rod 304. At this time, the vibration force is buffered and suppressed by the damping element 305 and the buffer block 306, making the device more stable when performing speed detection.

[0049] Specific implementation process: start the rotor assembly 102, the rotor assembly 102 drives the conduction ring 201 to rotate, and the speed detector body 204 also rotates. The speed detector body 204 is composed of a power supply module, a speed sensing module, an analysis module and a transmission module, and is mounted on the outside of the rotor assembly 102 with the detachable conduction ring 201. When the rotor assembly 102 is running, the transmission wheel 205 meshes with the gear ring 206 and rotates, and rotates together with the conduction ring 201. The slide groove 209 can guide the rotation-guided transmission wheel 205 and the speed detector body 204, so that the speed detector body 204 is more stable during the detection of the rotor assembly 102, and will not be offset or fall off, so that the device can achieve more convenient and intuitive speed detection, and is convenient to maintain and disassemble, thereby improving the practicality of the permanent magnet synchronous motor rotor speed detection mechanism.

[0050] When the device is running for detection and generates vibration, the buffer frame 303 is subjected to external force for position transmission, and the buffer groove 308 can guide the buffer frame 303 and the guide rod 304. At this time, the vibration force is buffered and suppressed by the damping member 305 and the buffer block 306, so that the device is more stable when performing speed detection.

[0051] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A permanent magnet synchronous motor rotor speed detection mechanism, characterized in that: It comprises a main body mechanism (1), the outer end of the main body mechanism (1) is sleeved with a detection component (2), and the rear end of the main body mechanism (1) is installed with a protection mechanism (3); The detection assembly (2) comprises a conductive ring (201), the upper end of the conductive ring (201) is movably connected to a transmission rod (202), the inner end of the transmission rod (202) is rotatably connected to a rotating shaft (203), the rear end of the rotating shaft (203) is fixedly connected to a rotation speed detector body (204), the front end of the rotating shaft (203) is fixedly connected to a transmission wheel (205), and the outer end of the transmission wheel (205) is meshingly connected to a gear ring (206).

2. A permanent magnet synchronous motor rotor speed detection mechanism according to claim 1, characterized in that: A guide block (207) is installed at the outer end of the rotation speed detector body (204), and a guide head (208) is fixedly connected to the rear end of the guide block (207).

3. A permanent magnet synchronous motor rotor speed detection mechanism according to claim 2, characterized in that: The outer end of the guide head (208) is provided with a slide groove (209), and the slide groove (209) is located at the outer end of the main body mechanism (1).

4. A permanent magnet synchronous motor rotor speed detection mechanism according to claim 1, characterized in that: The main body mechanism (1) comprises a receiving frame (101), and the inner end of the receiving frame (101) is rotatably connected to a rotor assembly (102).

5. A permanent magnet synchronous motor rotor speed detection mechanism according to claim 4, characterized in that: A conduction slot (103) is movably provided on the outer side of the rotor assembly (102), and a controller (104) is installed on the outer end of the receiving frame (101).

6. A permanent magnet synchronous motor rotor speed detection mechanism according to claim 5, characterized in that: The protection mechanism (3) comprises a mounting frame (301), the rear of the receiving frame (101) is slidably connected to the mounting frame (301), and the upper end of the mounting frame (301) is fixedly connected to an assembly frame (302).

7. A permanent magnet synchronous motor rotor speed detection mechanism according to claim 6, characterized in that: A buffer frame (303) is slidably connected to the lower side of the assembly frame (302); the outer end of the buffer frame (303) is hingedly connected to symmetrically distributed guide rods (304); the bottom end of the buffer frame (303) is fixedly connected to a damping member (305); and the other end of the guide rod (304) away from the buffer frame (303) is hingedly connected to a buffer block (306).

8. A permanent magnet synchronous motor rotor speed detection mechanism according to claim 7, characterized in that: A buffer member (307) is installed at the outer end of the buffer block (306), and a buffer groove (308) is provided at the outer end of the buffer member (307).

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