A motor shaft speed detection device

Abstract

This utility model relates to the field of fan motor shaft speed detection technology, specifically to a motor shaft speed detection device, including an encoder. The encoder has a mounting component and a connecting assembly. The connecting assembly includes a magnet and a coupling, with the magnet and motor shaft attracting each other. The mounting component includes a first connecting component and a second connecting component. The encoder is fixed to the first connecting component, and the second connecting component has a mounting groove with a bolt inside. The mounting groove is an oblong groove. Through the mounting groove and magnet, when encountering motors of different diameters, the encoder can be installed on motors of different diameters simply by sliding the bolt within the mounting groove. Furthermore, when disassembling the motor shaft and the encoder's test shaft, compared to the prior art which requires loosening multiple bolts on the coupling to separate the encoder and motor shaft, the magnet-driven attraction of this utility model facilitates disassembly.

Description

Technical Field

[0001] This utility model relates to the field of fan motor shaft speed detection technology, and specifically to a motor shaft speed detection device. Background Technology

[0002] Semiconductor wafer transport equipment typically requires a highly clean environment during operation. The primary technical means to achieve this high cleanliness is through an automatic pressure control system that dynamically adjusts fan speed to maintain a stable microenvironment pressure. The fan speed mainly depends on the speed of the fan motor shaft, which directly affects the fan's performance; therefore, it is necessary to monitor and ensure that the fan motor shaft speed meets the required standards.

[0003] In existing technologies, the rotational speed of a fan motor shaft is primarily detected using an encoder. During testing, the encoder is fixed to the fan motor. As a commonly used speed detection element, the encoder is typically coupled to the motor shaft via a mechanical connection. In existing technologies, encoder installation often relies on couplings. When connecting the encoder and motor, the encoder's test shaft is connected to the motor shaft via a coupling, and the encoder body is fixed to the motor using a fixing structure. Existing fixing mechanisms typically use bolts and connecting plates, with threaded holes on the connecting plate to accommodate the bolts. However, existing fixing mechanisms are difficult to adapt to motors of different diameters. Furthermore, in existing technologies, the encoder's test shaft is connected to the motor shaft via a coupling. After testing, the encoder needs to be removed from the motor. Besides loosening the bolts in the fixing mechanism, removing the motor shaft and the encoder's test shaft also requires loosening multiple bolts on the coupling, making disassembly very inconvenient. Utility Model Content

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide a motor shaft speed detection device, comprising:

[0005] The encoder is provided with a mounting component and a connecting assembly. The encoder is connected to a motor via the mounting component, and the test shaft of the encoder is connected to the motor shaft via the connecting assembly.

[0006] The connecting assembly includes a magnet and a coupling. The magnet has a connecting shaft, and the coupling has a through hole. The connecting shaft and the coupling are connected, and the connecting shaft passes through the through hole. The magnet and the motor shaft attract each other.

[0007] The mounting component includes a first connector and a second connector, which are connected. The first connector has a second through hole. The encoder is fixed on the first connector and the encoder's test shaft passes through the second through hole. The second connector has a mounting groove and a third through hole. A bolt is provided in the mounting groove. The second connector is connected to the motor by the bolt. The coupling and magnet are located in the third through hole. The mounting groove is an oblong groove arranged along the radial direction of the motor.

[0008] Furthermore, the second connecting member is provided with an adjustment hole one, and the coupling is provided with an adjustment hole two, the adjustment hole one and the adjustment hole two corresponding to each other.

[0009] Furthermore, both adjustment hole one and adjustment hole two are provided with at least two.

[0010] Furthermore, the second connector is provided with a plurality of adjustment slots, which are evenly distributed around the outer circumference of the motor shaft, and the plurality of adjustment slots and through holes are interconnected.

[0011] Furthermore, the first connector has a disc-shaped structure.

[0012] Furthermore, the longitudinal section of the second connector has a U-shaped structure.

[0013] The beneficial effects of this invention are as follows: By using the mounting slot and magnet, the encoder can be installed on motors of different diameters simply by sliding the bolts within the mounting slot. Furthermore, when disassembling the motor shaft and encoder test shaft, compared to the prior art which requires loosening multiple bolts on the coupling to separate the encoder and motor shaft, the magnet used in this invention facilitates easier disassembly by attracting the motor shaft. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] In the picture: Figure 1 A three-dimensional structural diagram of a motor shaft speed detection device and a motor connection provided by this utility model;

[0016] Figure 2 for Figure 1 Exploded view of the structure shown;

[0017] Figure 3 for Figure 1 A cross-sectional view of the structure shown;

[0018] Figure 4 for Figure 2 The three-dimensional structural diagram of the second connector shown;

[0019] Figure 5 for Figure 2 The diagram shows the three-dimensional structure of the connecting components.

[0020] Explanation of reference numerals in the attached drawings: 100, motor shaft speed detection device; 10, encoder; 11, test shaft; 20, mounting component; 21, first connecting component; 211, through hole two; 22, second connecting component; 221, mounting groove; 222, through hole three; 223, adjusting through groove; 224, adjusting hole one; 30, connecting assembly; 31, magnet; 311, connecting shaft; 32, coupling; 321, through hole one; 322, adjusting hole two; 200, motor; 201, motor shaft. Detailed Implementation

[0021] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic aspects of the present utility model, and therefore only shows the components relevant to the present utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] Please refer to Figure 1 and Figure 2 This utility model provides a motor shaft speed detection device 100, including an encoder 10. The encoder 10 is provided with a mounting part 20 and a connecting component 30. The encoder 10 is connected to the motor 200 through the mounting part 20, and the test shaft 11 of the encoder 10 is connected to the motor shaft 201 through the connecting component 30.

[0023] Please refer to Figure 3 and Figure 5 The connecting assembly 30 includes a magnet 31 and a coupling 32. The magnet 31 has a connecting shaft 311, and the coupling 32 has a through hole 321. The connecting shaft 311 and the coupling 32 are connected, and the connecting shaft 311 passes through the through hole 321. The magnet 31 and the motor shaft 201 attract each other. The motor shaft 201 is made of a metal material that the magnet 31 can attract.

[0024] Specifically, in this embodiment, the coupling 32 is a diaphragm coupling, and the encoder 10 is a commercially available component, specifically the FCM28-R small-size multi-turn absolute rotary encoder 10 manufactured by Beijing Feiboer Electronics Co., Ltd. The principle of the encoder 10 for detecting the speed of the motor 200 is existing technology and will not be elaborated upon in this embodiment.

[0025] Please refer to Figure 2 and Figure 3The mounting component 20 includes a first connecting component 21 and a second connecting component 22, which are connected together. The first connecting component 21 has a second through hole 211, and the encoder 10 is fixed on the first connecting component 21 with the test shaft 11 of the encoder 10 passing through the second through hole 211. The second connecting component 22 has a mounting groove 221 and a third through hole 222. A bolt is provided in the mounting groove 221, and the second connecting component 22 is connected to the motor 200 by the bolt. The coupling 32 and the magnet 31 are located in the third through hole 222. The second connecting component 22 has multiple adjusting through grooves 223, which are evenly distributed around the outer circumference of the motor shaft 201, and the multiple adjusting through grooves 223 and the third through hole 222 are all interconnected. When installing the encoder 10, first install the second connector 22 onto the motor 200 using bolts. Then, pass the test shaft 11 of the encoder 10 through the second through hole 211 and fix it relative to the coupling 32. Secure the main body of the encoder 10 and the first connector 21. Next, fix the first connector 21 and the second connector 22 with bolts. Simultaneously, the magnet 31 and the motor shaft 201 attract each other. Operators can observe whether the magnet 31 and the motor shaft 201 are concentric by adjusting the through slot 223 and adjust the positions of the mounting part 20 and the encoder 10 based on the observation results. This reduces the problem of the test shaft 11 of the encoder 10 shifting position, which could affect the accuracy of the test results.

[0026] Please refer to Figure 2 and Figure 3 The first connector 21 has a disc-shaped structure. The second connector 22 has a U-shaped longitudinal section. Specifically, the adjusting groove 223 is provided on the side wall of the second connector 22.

[0027] Please refer to Figure 4 The second connecting member 22 is provided with an adjustment hole 224, and the coupling 32 is provided with an adjustment hole 322, with the adjustment holes 224 and 322 corresponding to each other. There are at least two adjustment holes 224 and two adjustment holes 322. Specifically, in this embodiment, there are four adjustment holes 224 and two adjustment holes 322. During installation, any two adjacent adjustment holes 224 are aligned with the two adjustment holes 224 respectively to install the coupling 32.

[0028] Please refer to Figure 4 The mounting groove 221 is an oblong groove arranged in the radial direction of the motor 200. When the encoder 10 needs to be connected to motors 200 of different diameters via the mounting member 20, the second connecting member 22 is installed on the motor 200 by moving the bolt in the mounting groove 221 through the mounting member 20, thereby accommodating motors 200 of different diameters.

[0029] With the installation slot 221 and magnet 31, when encountering motors 200 of different diameters, the encoder 10 can be installed on motors 200 of different diameters simply by sliding the bolts within the installation slot 221. Furthermore, when disassembling the motor shaft 201 and the test shaft 11 of the encoder 10, compared to the prior art which requires loosening multiple bolts on the coupling 32 to separate the encoder 10 and the motor shaft 201, the magnet 31 used in this invention attracts the motor shaft 201, making disassembly much easier.

Claims

1. An electric motor shaft rotation speed detecting device characterized by comprising: include: An encoder is provided, comprising a mounting component and a connecting assembly. The encoder is connected to a motor via the mounting component, and the encoder's test shaft is connected to the motor shaft via the connecting assembly. The connecting assembly includes a magnet and a coupling. The magnet has a connecting shaft, and the coupling has a through hole. The connecting shaft is connected to the coupling and passes through the through hole. The magnet and the motor shaft are attracted to each other. The mounting component includes a first connecting component and a second connecting component, which are connected. The first connecting component has a through hole, and the encoder is fixed to the first connecting component with its test shaft passing through the through hole. The second connecting component has a mounting groove and a through hole. A bolt is provided in the mounting groove, and the second connecting component is connected to the motor via the bolt. The coupling and the magnet are located in the through hole. The mounting groove is a waist-shaped groove arranged along the radial direction of the motor.

2. The motor shaft speed detection device according to claim 1, characterized in that: The second connector is provided with an adjustment hole one, and the coupling is provided with an adjustment hole two, with the adjustment hole one and the adjustment hole two corresponding to each other.

3. The motor shaft speed detection device according to claim 2, characterized in that: Both adjustment hole one and adjustment hole two are provided with at least two.

4. The motor shaft speed detection device according to claim 1, characterized in that: The second connector is provided with multiple adjustment slots, which are evenly distributed around the outer circumference of the motor shaft, and the multiple adjustment slots and through holes are interconnected.

5. The motor shaft speed detection device according to claim 1, characterized in that: The first connector is a disc-shaped structure.

6. The motor shaft speed detection device according to claim 1, characterized in that: The longitudinal section of the second connector is a Z-shaped structure.

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