Motor speed measuring device

Abstract

The invention discloses a motor speed measuring device, which comprises a fixed seat, a friction mechanism and a speed measuring mechanism, the friction mechanism is movably connected to the fixing base and used for abutting against a rotating shaft of a motor. The speed measuring mechanism is installed on the fixing base and used for detecting the rotating speed of the friction mechanism. The motor speed measuring device is simple to operate, can flexibly adapt to different motor rotating shafts, and does not need to adjust and replace parts complexly, thereby remarkably improving the adaptability to various motors. Meanwhile, the speed measurement performance is optimized through the specialized design that the friction mechanism and the speed measurement mechanism are separated, high-precision rotation speed measurement can be achieved, the stability of the motor speed measurement device is guaranteed through the fixing base, external interference is reduced, the measurement precision is further improved, and the high-precision motor speed measurement requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of motor speed measurement, and particularly to a motor speed measurement device. Background Art

[0002] During the production, debugging, and use of motors, accurately measuring the rotational speed of the motor is crucial. Existing motor speed measurement methods and motor speed measurement devices have many deficiencies. For example, some motor speed measurement devices have poor adaptability to motors; there are also some motor speed measurement devices with low measurement accuracy and cannot meet the requirements of high-precision motor speed measurement. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of poor adaptability and low measurement accuracy of existing motor speed measurement devices, and provide a motor speed measurement device.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An embodiment of the present invention provides a motor speed measurement device, including: a fixed seat, a friction mechanism, and a speed measurement mechanism; the friction mechanism is movably connected to the fixed seat and is used to abut against the rotating shaft of the motor; the speed measurement mechanism is installed on the fixed seat and is used to detect the rotational speed of the friction mechanism.

[0006] In one embodiment, the friction mechanism includes a friction component, a rotating component, and a bearing; the bearing is connected to the fixed seat; one end of the rotating component is connected to the bearing, and the other end is connected to the friction component; the friction component is used to abut against the rotating shaft; the speed measurement mechanism is used to detect the rotational speed of the rotating component.

[0007] In one embodiment, the rotating component includes a rotating shaft, an elastic member, and a movable rod; the rotating shaft is movably connected to the bearing and has a movable groove inside; the elastic member and the movable rod are installed in the movable groove, and both ends of the elastic member are respectively connected to the rotating shaft and the movable rod; one end of the movable rod close to the elastic member is also drivingly connected to the rotating shaft, and the other end is drivingly connected to the friction component.

[0008] In one embodiment, the rotating shaft is axially provided with a guiding groove; the movable rod is connected with a guiding member; the guiding member is slidably connected to the guiding groove.

[0009] In one embodiment, a signal trigger member is connected to the outer periphery of the rotating shaft; the speed measurement mechanism includes a speed measurement sensor installed on the fixed seat; the speed measurement sensor is arranged facing the rotating shaft and is used to sense the signal trigger member.

[0010] In one embodiment, a driving mechanism is connected to one end of the fixed seat away from the friction mechanism.

[0011] In one embodiment, the fixing seat includes a first fixing plate, a second fixing plate and a shock absorber; the two ends of the shock absorber are respectively connected to the first fixing plate and the second fixing plate; the bearing is connected to the first fixing plate; and the driving mechanism is connected to the second fixing plate.

[0012] In one embodiment, the speed measuring mechanism further includes a fixing member, one end of which is connected to the second fixing plate, and the other end of which passes through the first fixing plate and is connected to the speed measuring sensor.

[0013] In one embodiment, the driving mechanism includes a movable guide rail and a driving member; the driving member is provided with an output shaft; the output shaft, the movable guide rail and the second fixed plate are sequentially transmission-connected; the driving member is also slidably connected to the movable guide rail.

[0014] In one embodiment, the friction assembly includes an outer friction head and / or an inner friction head; the outer friction head is detachably connected to the movable rod for abutting against the outer side of the rotating shaft; the inner friction head is also detachably connected to the movable rod for abutting against the center hole of the rotating shaft.

[0015] The motor speed measuring device of the present invention has the following beneficial effects compared with the prior art: the motor speed measuring device has an ingenious structure, and integrates the friction mechanism and the speed measuring mechanism into a fixed seat, wherein the friction mechanism is used to abut against the motor rotating shaft, and the speed measuring mechanism is used to detect the rotation speed of the friction mechanism, thereby facilitating the motor speed measurement, and can flexibly adapt to different motor rotating shafts without the need for complex adjustment and replacement of components, thereby significantly improving the adaptability to various types of motors. At the same time, the specialized design of separating the friction mechanism from the speed measuring mechanism optimizes the speed measurement performance, and can achieve high-precision speed measurement, and the fixed seat ensures the stability of the motor speed measuring device, reduces external interference, further improves the measurement accuracy, and meets the high-precision motor speed measurement requirements.

[0016] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of an application scenario of the motor speed measuring device provided by the present invention;

[0019] Figure 2Schematic structural diagram of the motor speed measurement device provided by the present invention;

[0020] Figure 3 Explosion diagram of the friction mechanism provided by the present invention;

[0021] Figure 4 Explosion diagram of the fixed seat, speed measurement mechanism and drive mechanism provided by the present invention. Description of the drawings

[0023] 1. Fixed seat; 11. First fixing plate; 12. Second fixing plate; 13. Shock absorber; 2. Friction mechanism; 21. Friction assembly; 211. Outer friction head; 212. Inner friction head; 22. Rotating assembly; 221. Rotating shaft; 2211. Guide groove; 222. Elastic member; 223. Moving rod; 2231. Mounting portion; 224. Guide member; 225. Signal trigger member; 23. Bearing; 3. Speed measurement mechanism; 31. Speed measurement sensor; 32. Fixing member; 4. Rotating shaft; 5. Drive mechanism; 51. Moving guide rail; 52. Driving member; 521. Output shaft. Detailed implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the motor speed measurement device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless specifically defined otherwise.

[0028] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0030] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0031] See Figures 1 to 4 As shown, the present invention provides a specific embodiment of a motor speed measuring device, including: a fixed seat 1, a friction mechanism 2, and a speed measuring mechanism 3; the friction mechanism 2 is movably connected to the fixed seat 1 and is used for abutting against the rotating shaft 4 of the motor; the speed measuring mechanism 3 is mounted on the fixed seat 1 and is used for detecting the rotation speed of the friction mechanism 2.

[0032] Specifically, by integrating the entire motor speed measurement device onto the fixed seat 1, the friction mechanism 2 abuts against the motor rotating shaft 4, and the friction mechanism 2 is made to rotate together with the motor rotating shaft 4 by means of friction. The speed measurement mechanism 3 is installed on the fixed seat 1 and is used to detect the rotational speed of the friction mechanism 2, thereby indirectly obtaining the rotational speed of the motor rotating shaft 4. The fixed seat 1 serves to support and fix the friction mechanism 2 and the speed measurement mechanism 3, ensuring the stability of the entire motor speed measurement device. This motor speed measurement device has a simple structure and is easy to implement. It can conveniently connect the motor speed measurement device to the motor and measure the motor speed by detecting the rotational speed of the friction mechanism 2, enabling it to relatively flexibly adapt to the rotating shafts 4 of different types of motors. When measuring the speed of the motor, as long as the friction mechanism 2 is abutted against the rotating shaft 4 to achieve effective contact between the friction mechanism 2 and the rotating shaft 4, the speed measurement function can be realized, without the need for complex adjustments or component replacements for different motors, thus improving the adaptability to different motors. At the same time, this motor speed measurement device separates the friction mechanism 2 and the speed measurement mechanism 3, and the speed measurement mechanism 3 is specifically used to detect the rotational speed of the friction mechanism 2. This specialized design optimizes the performance of the speed measurement mechanism 3 to a certain extent, enabling higher-precision rotational speed measurement to meet the requirements of high-precision motor speed measurement. In addition, the setting of the fixed seat 1 makes the entire motor speed measurement device more stable during operation, reducing the influence of factors such as vibration on the speed measurement result, thereby contributing to further improving the measurement accuracy.

[0033] In a specific embodiment, the friction mechanism 2 includes a friction assembly 21, a rotating assembly 22, and a bearing 23; the bearing 23 is connected to the fixed seat 1; one end of the rotating assembly 22 is connected to the bearing 23, and the other end is connected to the friction assembly 21; the friction assembly 21 is used to abut against the rotating shaft 4; the speed measurement mechanism 3 is used to detect the rotational speed of the rotating assembly 22.

[0034] Specifically, the bearing 23 is installed on the fixed seat 1 to provide support for the rotating assembly 22, enabling the rotating assembly 22 to rotate smoothly. One end of the rotating assembly 22 is connected to the fixed seat 1 through the bearing 23, and the other end is connected to the friction assembly 21. When the friction assembly 21 abuts against the motor rotating shaft 4, the motor rotating shaft 4 drives the friction assembly 21 to rotate, and then drives the rotating assembly 22 to rotate around the bearing 23. The speed measurement mechanism 3 obtains the motor speed by detecting the rotational speed of the rotating assembly 22. This structure further details the composition of the friction mechanism 2, making the rotation of the friction mechanism 2 more stable and improving the accuracy of speed measurement. The use of the bearing 23 reduces the friction force during the rotation of the rotating assembly 22, improves the mechanical efficiency of the motor speed measurement device, and also extends the service life of the motor speed measurement device.

[0035] In a specific embodiment, the rotating assembly 22 includes a rotating shaft 221, an elastic member 222, and a movable rod 223; the rotating shaft 221 is movably connected to the bearing 23 and is internally provided with a movable groove (not shown in the figure); the elastic member 222 and the movable rod 223 are installed in the movable groove, and both ends of the elastic member 222 are respectively connected to the rotating shaft 221 and the movable rod 223; one end of the movable rod 223 close to the elastic member 222 is also drivingly connected to the rotating shaft 221, and the other end is drivingly connected to the friction assembly 21.

[0036] Specifically, one end of the movable rod 223 is connected to the elastic member 222 and is drivingly connected to the rotating shaft 221, and the other end is connected to the friction assembly 21. When the motor rotating shaft 4 drives the friction assembly 21 to rotate, the friction assembly 21 drives the rotating shaft 221 to rotate synchronously through the movable rod 223, thereby realizing the power transmission between the friction assembly 21 and the rotating shaft 221 and making the power transmission more reliable. The elastic member 222 is arranged in the movable groove of the rotating shaft 221. Its function is that when the friction assembly 21 abuts against the motor rotating shaft 4, the friction assembly 21 will generate a thrust on the movable rod 223, causing the elastic member 222 to be compressed by the thrust of the movable rod 223 and generate a corresponding reaction force. This reaction force in turn pushes the movable rod 223 and the friction assembly 21 in the reverse direction, so that the friction assembly 21 always stably abuts against the motor rotating shaft 4 during the speed measurement process, thus ensuring the smoothness of the transmission and the accuracy of the speed measurement. Moreover, the setting of the elastic member 222 also improves the adaptability of the motor speed measurement device to the changes in the motor speed and vibrations, and reduces the influence of the unstable operation of the motor on the speed measurement accuracy. Through the buffering effect of the elastic member 222, the components inside the motor speed measurement device are protected, and the service life of the motor speed measurement device is extended.

[0037] It can be understood that the elastic member 222 can adopt different types of elastic elements, such as springs, rubber pads, etc. The shape and size of the movable groove can also be adjusted according to actual needs to adapt to the installation requirements of different elastic members 222 and movable rods 223.

[0038] In a specific embodiment, the rotating shaft 221 is axially provided with a guiding groove 2211; the movable rod 223 is connected with a guiding member 224; the guiding member 224 is slidably connected to the guiding groove 2211.

[0039] Specifically, when the movable rod 223 is displaced under the action of the friction assembly 21 and the elastic member 222, the guide member 224 slides in the guide groove 2211, thereby restricting the movement direction of the movable rod 223, enabling the movable rod 223 to only move axially relative to the rotating shaft 221, and maintaining the synchronous movement of the movable rod 223 and the rotating shaft 221 in the circumferential direction, ensuring the transmission stability between the movable rod 223 and the rotating shaft 221. The arrangement of the guide groove 2211 and the guide member 224 further improves the accuracy and stability of the movement of the movable rod 223, and ensures the synchronism of the circumferential movement of the movable rod 223 and the rotating shaft 221, thereby improving the speed measurement accuracy of the entire motor speed measurement device. At the same time, this structure is simple and easy to process and install.

[0040] In a specific embodiment, a signal trigger 225 is connected to the outer periphery of the rotating shaft 221; the speed measurement mechanism 3 includes a speed measurement sensor 31 installed on the fixed seat 1; the speed measurement sensor 31 is arranged facing the rotating shaft 221 for sensing the signal trigger 225.

[0041] Specifically, the signal trigger 225 is connected to the outer periphery of the rotating shaft 221 and rotates together with the rotating shaft 221. The speed measurement sensor 31 is installed on the fixed seat 1 and faces the rotating shaft 221. When the signal trigger 225 rotates past the speed measurement sensor 31 along with the rotating shaft 221, the speed measurement sensor 31 can sense the change of the signal trigger 225, and calculate the rotation speed of the rotating shaft 221 by detecting the change frequency of the signal trigger 225, and then obtain the rotation speed of the motor. This speed measurement method has a high accuracy and can accurately measure the rotation speed of the motor. The cooperation of the signal trigger 225 and the speed measurement sensor 31 makes the speed measurement process more stable and reliable, and is not easily affected by external interference. At the same time, the speed measurement sensor 31 is installed on the fixed seat 1, which is convenient for installation and maintenance.

[0042] It can be understood that the signal trigger 225 can adopt different forms, such as magnetic materials, reflective materials, etc. The speed measurement sensor 31 can also select the corresponding sensor according to the type of the signal trigger 225. For example, when the signal trigger 225 is a magnetic material, a Hall sensor can be used; when the signal trigger 225 is a reflective material, a photoelectric sensor can be used. In addition, sensors with other speed measurement principles, such as encoders, can also be used, as long as the detection of the rotation speed of the rotating shaft 221 can be achieved.

[0043] In a specific embodiment, a drive mechanism 5 is connected to one end of the fixed seat 1 away from the friction mechanism 2.

[0044] Specifically, the driving mechanism 5 is connected to one end of the fixed seat 1 away from the friction mechanism 2, and its function is to provide power for the entire motor speed measuring device to move or adjust its position. When the motor speed measuring device needs to be installed on the motor, the driving mechanism 5 can drive the fixed seat 1 to move, so that the friction mechanism 2 can be accurately and stably connected to the motor rotating shaft 4. The setting of the driving mechanism 5 increases the flexibility of the motor speed measuring device and facilitates its use in different working scenarios. The position of the motor speed measuring device can be quickly and accurately adjusted through the driving mechanism 5, improving the work efficiency.

[0045] In a specific embodiment, the fixed seat 1 includes a first fixing plate 11, a second fixing plate 12 and a shock absorber 13; both ends of the shock absorber 13 are respectively connected to the first fixing plate 11 and the second fixing plate 12; the bearing 23 is connected to the first fixing plate 11; the driving mechanism 5 is connected to the second fixing plate 12.

[0046] Specifically, the fixed seat 1 is composed of a first fixing plate 11, a second fixing plate 12 and a shock absorber 13. The shock absorber 13 is connected between the first fixing plate 11 and the second fixing plate 12, playing a role of buffering and shock absorption. When the motor runs and generates vibrations, the shock absorber 13 can absorb and reduce the vibrations transmitted to the fixed seat 1, thereby reducing the impact on the speed measuring mechanism 3, the friction mechanism 2 and the driving mechanism 5. The bearing 23 is installed on the first fixing plate 11 to support the rotating assembly 22; the driving mechanism 5 is connected to the second fixing plate 12 to provide power for the entire motor speed measuring device. The setting of the shock absorber 13 improves the anti-vibration ability of the motor speed measuring device and ensures the accuracy of speed measurement. During the operation of the motor, even if large vibrations occur, through the action of the shock absorber 13, the damage to the internal components of the motor speed measuring device caused by vibrations can be effectively reduced, and the service life of the motor speed measuring device can be extended. At the same time, the structure of this fixed seat 1 is reasonable, facilitating the installation and maintenance of each component.

[0047] It can be understood that the shock absorber 13 can adopt different types of shock-absorbing materials or shock absorbers, such as rubber shock pads, spring shock absorbers, air shock absorbers, etc.

[0048] In a specific embodiment, the speed measuring mechanism 3 further includes a fixing member 32. One end of the fixing member 32 is connected to the second fixing plate 12, and the other end passes through the first fixing plate 11 and is connected to the speed sensor 31.

[0049] Specifically, one end of the fixing member 32 is connected to the second fixing plate 12, and the other end extends to the end of the first fixing plate 11 away from the shock absorbing member 13 and is connected to the speed sensor 31. Its function is to stably fix the speed sensor 31 on the fixing seat 1 to ensure the position accuracy of the speed sensor 31 during operation. At the same time, the speed sensor 31 is connected to the second fixing plate 12 through the fixing member 32, and the stability of the second fixing plate 12 is used to improve the anti-vibration ability of the speed sensor 31. The setting of the fixing member 32 makes the installation of the speed sensor 31 more secure, reduces the position deviation of the speed sensor 31 caused by vibration or other factors, and thus improves the accuracy of speed measurement. The connection method of the fixing member 32 ensures a reliable connection between the speed sensor 31 and the fixing seat 1, and facilitates the installation and disassembly of the speed sensor 31 for maintenance and replacement.

[0050] In a specific embodiment, the driving mechanism 5 includes a movable guide rail 51 and a driving member 52; the driving member 52 is provided with an output shaft 521; the output shaft 521, the movable guide rail 51 and the second fixed plate 12 are sequentially transmission-connected; the driving member 52 is also slidably connected to the movable guide rail 51.

[0051] Specifically, when the driving member 52 is working, the output shaft 521 is extended and retracted, driving the movable guide rail 51 to move along its preset guide direction. One end of the movable guide rail 51 is connected to the output shaft 521 to receive the driving force of the output shaft 521, and the other end is connected to the second fixed plate 12 to transmit the driving force to the second fixed plate 12. In this process, the telescopic movement of the output shaft 521 is converted into the linear movement of the movable guide rail 51. The movement of the movable guide rail 51 drives the second fixed plate 12 connected thereto to move synchronously. Since the fixed seat 1 is composed of the first fixed plate 11, the second fixed plate 12 and the shock absorber 13, the movement of the second fixed plate 12 causes the entire fixed seat 1 to move. Through such a structure, the telescopic power of the output shaft 521 of the driving member 52 can be accurately transmitted to the fixed seat 1, so as to adjust the position of the motor speed measuring device. The driving member 52 is fixed, and the movable guide rail 51 is driven to move only by the extension and retraction of the output shaft 521. This design can realize the precise control of the position of the fixed seat 1. Compared with the way the driving member 52 moves by itself, the position deviation caused by factors such as the change in the center of gravity of the driving member 52 is reduced. When the motor speed measuring device is precisely positioned, the friction mechanism 2 can be more accurately aligned with the motor rotating shaft 4, thereby improving the accuracy of the installation of the motor speed measuring device and thus improving the speed measurement accuracy. At the same time, the stable movement of the movable guide rail 51 in the guide direction, combined with the fixed state of the driving member 52, forms a relatively stable power transmission system. Even in a complex working environment, such as when there is a large vibration generated by the operation of the motor, the power can be smoothly transmitted to the fixed seat 1, reducing the displacement or shaking of the motor speed measuring device due to vibration, and improving the working stability of the motor speed measuring device.

[0052] It is understandable that the driving member 52 can select different types of power devices according to actual needs, such as motors, cylinders, etc.

[0053] In a specific embodiment, the friction assembly 21 includes an outer friction head 211 and / or an inner friction head 212; the outer friction head 211 is detachably connected to the movable rod 223 and is used for abutting against the outer side of the rotating shaft 4; the inner friction head 212 is also detachably connected to the movable rod 223 and is used for abutting against the central hole of the rotating shaft 4.

[0054] Specifically, when it is necessary to measure the rotational speed of the motor rotating shaft 4 and the motor rotating shaft 4 has no central hole, the outer friction head 211 is installed on the movable rod 223 and the outer friction head 211 abuts against the outer side of the motor rotating shaft 4. The outer friction head 211 and the movable rod 223 are driven to rotate synchronously through friction, and then the rotating shaft 221 and the signal trigger 225 on its outer periphery are driven to rotate synchronously, so that the speed measurement sensor 31 can realize speed measurement by sensing the trigger signal of the signal trigger 225. When there is a hole in the center of the motor rotating shaft 4, the inner friction head 212 can be installed on the movable rod 223 and the inner friction head 212 can be inserted into the central hole of the rotating shaft 4, and the inner friction head 212 and the movable rod 223 are driven to rotate through friction. Or the inner friction head 212 and the outer friction head 211 can jointly abut against the rotating shaft 4, that is, the inner friction head 212 abuts against the central hole of the rotating shaft 4 to provide support and friction from the inside, and the outer friction head 211 abuts against the outer side of the rotating shaft 4 to apply pressure from the outside. This internal and external cooperation method enables the rotating shaft 4 to be restricted in multiple directions. Compared with using only the inner friction head 212 or the outer friction head 211 alone, the stability of the connection with the rotating shaft 4 is greatly enhanced. Even when the motor rotates at a high speed or there is a large vibration, it can effectively prevent relative displacement, loosening or even detachment between the friction assembly 21 and the rotating shaft 4, ensuring that the entire motor speed measurement device can work stably, reducing the speed measurement error caused by unstable connection, improving the accuracy of speed measurement, and meeting the requirements for high-precision motor speed measurement. The design of the outer friction head 211 and the inner friction head 212 increases the adaptability of the motor speed measurement device to different types of motor rotating shafts 4 and improves the versatility of the motor speed measurement device. The detachable connection method facilitates the replacement of friction heads of different specifications to meet the speed measurement requirements of motor rotating shafts 4 of different sizes and structures. At the same time, selecting a suitable friction head for speed measurement according to the actual situation of the motor rotating shaft 4 can improve the accuracy and reliability of speed measurement.

[0055] More specifically, an installation portion 2231 is provided at one end of the movable rod 223 close to the friction assembly 21. The installation portion 2231 is annularly arranged, and the outer friction head 211 or the inner friction head 212 abuts against the inner side or the outer side of the installation portion 2231; at least one first fixing hole (not shown in the figure) is provided in the radial direction of the installation portion 2231, preferably two to six; the outer friction head 211 and the inner friction head 212 are provided with second fixing holes corresponding to the first fixing holes (not shown in the figure), and a connecting member (not shown in the figure) is detachably connected to the first fixing hole and the second fixing hole.

[0056] Specifically, an annular installation portion 2231 is provided at one end of the movable rod 223 close to the friction assembly 21, providing an installation basis for the outer friction head 211 and the inner friction head 212. The annular structure can evenly distribute the force, ensuring that the friction assembly 21 is stably connected to the installation portion 2231 during operation, and avoiding loosening or damage caused by uneven local force. Moreover, the annular installation portion 2231 provides a clear positioning for the installation of the friction head, reducing the installation difficulty and improving the assembly efficiency. Operators can quickly and accurately install the friction head on the movable rod 223, reducing the installation time and labor costs. A plurality of first fixing holes are provided in the radial direction of the installation portion 2231, and the outer friction head 211 and the inner friction head 212 are correspondingly provided with second fixing holes. The detachable connection is realized by a connecting member (such as a bolt, a pin, etc.) passing through these fixing holes. This design enables the friction head to be flexibly replaced according to the actual situation of the motor rotating shaft 4, and the connection is firm and reliable. Moreover, the plurality of fixing holes are evenly distributed on the installation portion 2231. After being fixed by the connecting member, it can effectively prevent the friction head from displacing, rotating or falling off during operation. Especially in the case of high-speed rotation or vibration of the motor, the stable connection can ensure the normal operation of the motor speed measuring device and improve the speed measurement accuracy.

[0057] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. A motor speed measuring device, characterized in that, Including: A fixed seat, a friction mechanism and a speed measuring mechanism; the friction mechanism is movably connected to the fixed seat and is used for abutting against the rotating shaft of the motor; The speed measuring mechanism is installed on the fixed seat and is used for detecting the rotating speed of the friction mechanism.

2. The motor speed measuring device according to claim 1, characterized in that, The friction mechanism includes a friction component, a rotating component and a bearing; the bearing is connected to the fixed seat; one end of the rotating component is connected to the bearing, and the other end is connected to the friction component; the friction component is used for abutting against the rotating shaft; the speed measuring mechanism is used for detecting the rotating speed of the rotating component.

3. The motor speed measuring device according to claim 2, wherein The rotating component includes a rotating shaft, an elastic member and a movable rod; the rotating shaft is movably connected to the bearing and is internally provided with a movable groove; the elastic member and the movable rod are installed in the movable groove, and two ends of the elastic member are respectively connected to the rotating shaft and the movable rod; one end of the movable rod close to the elastic member is also drivingly connected to the rotating shaft, and the other end is drivingly connected to the friction component.

4. The motor speed measuring device according to claim 3, characterized in that, The rotating shaft is axially provided with a guiding groove; the movable rod is connected with a guiding member; the guiding member is slidably connected to the guiding groove.

5. The motor speed measuring device according to claim 3, characterized in that, A signal trigger member is connected to the outer periphery of the rotating shaft; the speed measuring mechanism includes a speed measuring sensor installed on the fixed seat; the speed measuring sensor is arranged facing the rotating shaft and is used for sensing the signal trigger member.

6. The motor speed measuring device according to claim 5, wherein, A driving mechanism is connected to one end of the fixed seat away from the friction mechanism.

7. The motor speed measuring device according to claim 6, characterized in that, The fixed seat includes a first fixing plate, a second fixing plate and a shock-absorbing member; two ends of the shock-absorbing member are respectively connected to the first fixing plate and the second fixing plate; the bearing is connected to the first fixing plate; the driving mechanism is connected to the second fixing plate.

8. The motor speed measuring device according to claim 7, characterized in that, The speed measuring mechanism further includes a fixing member, one end of the fixing member is connected to the second fixing plate, and the other end passes through the first fixing plate and is connected to the speed measuring sensor.

9. The motor speed measuring device according to claim 7, characterized in that, The driving mechanism includes a movable guide rail and a driving member; the driving member is provided with an output shaft; the output shaft, the movable guide rail and the second fixing plate are sequentially drivingly connected; the driving member is also slidably connected to the movable guide rail.

10. The motor speed measuring device according to claim 3, wherein The friction component includes an outer friction head and / or an inner friction head; the outer friction head is detachably connected to the movable rod and is used for abutting against the outer side of the rotating shaft; the inner friction head is also detachably connected to the movable rod and is used for abutting against the central hole of the rotating shaft.

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