Elevator roller speed detection device

Abstract

The utility model provides an elevator roller speed detection device which comprises a rubber coating wheel, a rotating mechanism and a speed encoder, the speed encoder is connected with a shaft coupler through an encoder coupler, the rubber coating wheel is in contact with a roller, a rotating shaft is driven to rotate through friction force, and the speed of the roller is detected. The shaft coupling is in flexible connection with the encoder coupling, and finally the speed encoder is driven to operate, so that the working modes that magnets are attached to the periphery of the roller, a Hall sensor is installed, the precision is low, errors are large, and speed loss is prone to occurring are effectively solved. And the operation safety and stability of the elevator can be greatly improved.

Description

Technical Field

[0001] This utility model relates to the electrical control system of mine hoists, and in particular to a hoist drum speed detection device. Background Technology

[0002] The bucket elevator drum speed measuring device is a device that monitors the operating status of a bucket elevator by measuring the speed of the drum. The drum speed measuring device plays an important role in industrial production applications, as it can realize real-time monitoring of the elevator's operating status, ensuring the safety and stability of the production process.

[0003] Existing speed measuring devices typically involve attaching magnets around the hoist drum and then installing Hall sensors for detection. A single drum often requires hundreds of magnets. The distance between the magnets, the distance between the magnets and the Hall sensor, the interaction between the magnetic forces of the magnets, and the sensitivity of the Hall sensor itself all directly affect the accuracy of the speed measurement, easily leading to large errors and speed loss.

[0004] In view of this, the inventors specifically designed a hoist drum speed detection device, which led to this invention. Utility Model Content

[0005] To solve the above problems, the technical solution of this utility model is as follows:

[0006] A hoist drum speed detection device, comprising:

[0007] Rubber-coated wheels make frictional contact with the inner wall of the elevator drum;

[0008] The rotating mechanism includes a rotating shaft, bearing seats, rotating cams, and a fixed bracket. Two bearing seats are provided and are arranged opposite to each other on the rotating shaft. Two rotating cams are provided and are arranged opposite to each other between the two bearing seats. One end of the rotating shaft is connected to a rubber-coated wheel, and the other end is fixedly installed with a shaft coupling. The rotating cams are rotatably connected to the fixed bracket.

[0009] A speed encoder is used to detect the speed of the hoist drum. The speed encoder is connected to the shaft coupling via an encoder coupling.

[0010] Preferably, it also includes a tensioning mechanism, which includes a support frame, a tensioning spring, and an adjusting plate fixedly mounted on a fixed bracket. The support frame is fixedly connected to the rotating shaft and located between two rotating cams. The two ends of the tensioning spring are detachably connected to the support frame and the adjusting plate, respectively.

[0011] Preferably, the support frame includes a support plate and connecting plates disposed opposite to each other on the support plate, and the two connecting plates are respectively fixedly connected to two rotating cams.

[0012] Preferably, the support plate is provided with a ring, the adjusting plate has a strip hole, a threaded rod is fixedly connected in the strip hole, and the two ends of the tension spring are detachably connected to the strip hole and the threaded rod, respectively.

[0013] Preferably, the rubber-coated wheel is fixedly connected to the rotating shaft by a fastening screw, and a positioning bushing is fixed to the end of the rubber-coated wheel away from the fastening screw, and the positioning bushing is sleeved on the rotating shaft.

[0014] Preferably, the encoder coupling and the shaft coupling are provided with disks at their adjacent ends, and the two disks are connected by a number of steel wires, which are evenly distributed around the edges of the two disks.

[0015] Preferably, the fixed bracket includes a base plate and two mounting brackets fixedly connected to the base plate. The two mounting brackets are arranged opposite to each other, and a fixed shaft is provided between the tops of the two mounting brackets. The adjusting plate is fixedly connected to the two mounting brackets, and the rotating cam is rotatably connected to the fixed shaft.

[0016] Preferably, a cam positioning plate is also fixedly connected between the two mounting brackets, and the cam positioning plate is in contact with the rotating cam.

[0017] Preferably, one end of the fixed shaft is connected to the mounting bracket via a locating pin, and the other end of the fixed shaft is fixedly connected to the mounting bracket via a fixing nut.

[0018] Preferably, it also includes an encoder mounting bracket, the speed encoder is mounted on the outside of the encoder mounting bracket, the shaft of the speed encoder passes through the outside of the encoder mounting bracket and is fixedly connected to the encoder coupling, the shaft encoder mounting bracket is fixedly connected to the rotating mechanism, the encoder mounting bracket includes a fixing plate and a first mounting plate and a second mounting plate disposed opposite to each other on the fixing plate, the first mounting plate is fixedly connected to the rotating cam, and the second mounting plate is connected to the encoder coupling.

[0019] The technical solution provided by this utility model has the following beneficial effects:

[0020] 1. This utility model, by having a rubber-coated wheel contact the drum, drives the rotating shaft to rotate through friction, which in turn drives the rotating cam and shaft coupling to rotate. The shaft coupling is softly connected to the encoder coupling, ultimately driving the speed encoder to run. This effectively solves the problem of low accuracy, large error, and easy speed loss caused by attaching magnets and installing Hall sensors around the drum. It can greatly improve the safety and stability of the hoist operation.

[0021] 2. This utility model uses a support frame and a tension spring to drive the device in the direction of motion during the forward and reverse rotation of the hoist drum. The tension spring then returns the device to its predetermined working position, and the tension is adjustable at any time, ensuring the stable operation of the device.

[0022] 3. The encoder coupling and the shaft encoder are connected by a soft connection, which effectively protects the shaft encoder from the impact and deviation caused by the roller at the moment of start-up, thereby reducing the wear of the shaft encoder and extending its service life. Attached Figure Description

[0023] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0024] in:

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the rotating mechanism of this utility model;

[0027] Figure 3 This is a schematic diagram of the tensioning mechanism of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the fixed bracket of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the encoder mounting bracket of this utility model.

[0030] Label Explanation:

[0031] 1. Fixed bracket; 11. Fixed shaft; 111. Positioning pin; 112. Fixed nut; 12. Adjusting plate; 121. Strip hole; 122. Threaded rod; 13. Base plate; 14. Mounting bracket; 15. Cam positioning plate; 2. Rotating mechanism; 21. Rotating shaft; 22. Bearing seat; 23. Rotating cam; 24. Rubber-coated wheel; 25. Shaft coupling; 26. Positioning bushing; 27. Fastening screw; 3. Encoder mounting bracket; 31. Fixed plate; 32. First mounting plate; 33. Second mounting plate; 34. Encoder coupling; 35. Speed ​​encoder; 4. Tensioning mechanism; 41. Support frame; 42. Tensioning spring; 43. Support plate; 431. Ring; 44. Connecting plate. Detailed Implementation

[0032] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0033] Please see Figures 1-5 This is a preferred embodiment of a hoist drum speed detection device, comprising:

[0034] Rubber-coated wheel 24 makes frictional contact with the inner wall of the elevator drum;

[0035] The rotating mechanism 2 includes a rotating shaft 21, bearing seats 22, rotating cams 23 and a fixed bracket 1. Two bearing seats 22 are provided and are arranged opposite to each other on the rotating shaft 21. Two rotating cams 23 are provided and are arranged opposite to each other between the two bearing seats 22. One end of the rotating shaft 21 is connected to a rubber-coated wheel 24, and the other end is fixedly installed with a shaft coupling 25. The rotating cams 23 are rotatably connected to the fixed bracket 1.

[0036] A speed encoder 35 is used to detect the speed of the hoist drum. The speed encoder 35 is connected to the shaft coupling 25 via an encoder coupling 34. A rotating cam 23 is rotatably connected to a fixed shaft 11. A rotating shaft 21 is fixedly connected to a shaft encoder mounting bracket 3. Friction between the inner diameter of the drum and the rubber-coated wheel 24 drives the rotating shaft 21 to rotate, which in turn drives the rotating cam 23 and the shaft coupling 25 to rotate. The shaft coupling 25 is softly connected to the encoder coupling 34, ultimately driving the speed encoder 35. This effectively solves the problem of low accuracy, large errors, and easy speed loss associated with attaching magnets and installing Hall sensors around the drum. It greatly improves the safety and stability of the hoist operation. The detection device in this invention is made of stainless steel, making it fully suitable for the harsh production conditions of coal mines. It is also easy to process and has low manufacturing costs. This detection device can adapt to the forward and reverse rotation of the hoist drum and, through a soft connection, can adapt to different installation environments and working conditions.

[0037] For details, please refer to Figures 1-3The device also includes a tensioning mechanism 4, which comprises a support frame 41, a tension spring 42, and an adjusting plate 12 fixedly mounted on a fixed bracket 1. The support frame 41 is fixedly connected to the rotating shaft 21 and positioned between two rotating cams 23. The tension spring 42 is detachably connected at both ends to the support frame 41 and the adjusting plate 12, respectively. During the forward and reverse rotation of the hoist drum, the support frame 41 and the tension spring 42 drive the device to move in the direction of its movement. The tension spring then returns the device to its predetermined working position, and the tension force is adjustable at any time, ensuring the smooth operation of the device without vibration. At the same time, the tensioning mechanism 4, through the elastic force of the tension spring 42, can automatically adjust the tension between the rotating shaft 21 and the drum, ensuring that the rubber-coated wheel 24 and the drum always maintain good contact, avoiding slippage or loosening. This effectively reduces vibration and noise caused by uneven tension or impact during device operation, further improving the accuracy of measurement.

[0038] Specifically, the support frame 41 includes a support plate 43 and a connecting plate 44 disposed opposite to the support plate 43. The support plate 43 and the connecting plate 44 are integrally formed. The two connecting plates 44 are respectively fixedly connected to the two rotating cams 23. Through the combined design of the support plate 43 and the connecting plate 44, the support frame 41 enhances the support stability of the rotating shaft 21 and the rotating cam 23, reduces vibration and offset during operation, and reduces measurement errors caused by vibration and offset during measurement.

[0039] For details, please refer to Figures 1-4 The support plate 43 is provided with a ring 431, and the adjusting plate 12 has a strip hole 121. A threaded rod 122 is fixedly connected to the strip hole 121 by bolts. The two ends of the tension spring 42 are detachably connected to the strip hole 121 and the threaded rod 122 respectively. The design of the strip hole 121 and the threaded rod 122 on the adjusting plate 12 makes the tension adjustment of the tension spring 42 more flexible and can quickly adjust the tension of the spring according to actual needs. The design of the ring 431 on the support plate 43 and the strip hole 121 on the adjusting plate 12 ensures the installation accuracy of the tension spring 42 and avoids uneven tension caused by installation errors. At the same time, the tension spring 42 can be replaced to adapt to different hoist speed measurement, improving accuracy and making the device more applicable.

[0040] For details, please refer to Figures 1-4The rubber-coated wheel 24 is fixedly connected to the rotating shaft 21 by a fastening screw 27. A positioning sleeve 26 is fixed to the end of the rubber-coated wheel 24 away from the fastening screw. The positioning sleeve 26 is sleeved on the rotating shaft 21. The friction between the inner diameter of the roller and the rubber-coated wheel 24 drives the rotating shaft 21 to rotate. Due to long-term operation, the rubber-coated wheel 24 will wear out. During measurement, the measurement accuracy will decrease due to insufficient friction. Therefore, it should be replaced in time. When replacing, it is only necessary to remove the fastening screw 27 of the rotating shaft 21 to replace the worn rubber-coated wheel 24. The positioning sleeve 26 can accurately position the wheel, which is convenient, simple and easy to maintain.

[0041] For details, please refer to Figures 1-5 Both the encoder coupling 34 and the shaft coupling 25 have discs at their adjacent ends. The two discs are connected by several steel wires, which are evenly distributed around the edges of the two discs. The shaft coupling 25 and the encoder coupling 34 are connected by a flexible connection, which effectively protects the speed encoder 35 from impact and deviation caused by the roller at the moment of startup, thereby reducing the wear of the speed encoder 35 and extending the service life of the shaft encoder. At the same time, by selecting high-quality flexible connection materials, precise installation, and a reasonable disc-type flexible connection design structure, the potential impact on measurement accuracy is addressed. The flexible connection material is steel wire.

[0042] Please see Figures 1-5 The fixed bracket 1 includes a base plate 13 and two mounting brackets 14 fixedly connected to the base plate 13. The two mounting brackets 14 are arranged opposite to each other, and a fixed shaft 11 is provided between the tops of the two mounting brackets 14. An adjusting plate 12 is fixedly connected to the two mounting brackets 14, and a rotating cam 23 is rotatably connected to the fixed shaft 11. The design of the fixed bracket 1 ensures that the rotating shaft 21 and the fixed shaft 11 remain aligned and balanced during installation, reducing detection errors caused by shaft offset.

[0043] For further information, please refer to [link / reference]. Figures 1-5 A cam positioning plate 15 is also fixedly connected between the two mounting brackets 14. The cam positioning plate 15 contacts the rotating cam 23 to limit the overall movement tendency of the rotating cam 23 towards the cam positioning plate 15 when the device starts to move. The contact between the cam positioning plate 15 and the rotating cam 23 increases the support points of the rotating cam 23, further enhances the stability of the rotating cam 23, and reduces the measurement error caused by device offset.

[0044] Please see Figures 1-5 One end of the fixed shaft 11 is connected to the mounting bracket 14 via a positioning pin 111, and the other end of the fixed shaft 11 is fixedly connected to the mounting bracket 14 via a fixing nut 112. The fixed shaft 11 is enhanced in its stability during operation and reduced vibration and offset by the dual fixing method of the positioning pin 111 and the fixing nut 112.

[0045] For further information, please refer to [link / reference]. Figures 1-5 It also includes an encoder mounting bracket 3, a speed encoder 35 mounted on the outside of the encoder mounting bracket 3, and the shaft of the speed encoder 35 passing through the outside of the encoder mounting bracket 3 and fixedly connected to the encoder coupling 34. The shaft encoder mounting bracket 3 is fixedly connected to the rotating mechanism 2. The encoder mounting bracket 3 includes a fixing plate 31 and a first mounting plate 32 and a second mounting plate 33 disposed opposite to each other on the fixing plate 31. The first mounting plate 32 is fixedly connected to the rotating cam 23, and the second mounting plate 33 is connected to the encoder coupling 34. The design of the encoder mounting bracket 3 enhances the stability of the encoder during operation and reduces vibration and offset.

[0046] The implementation principle of the hoist drum speed detection device provided by this utility model is as follows: when detection is required, the rubber-coated wheel 24 is brought into contact with the inner diameter of the drum, and then the bottom of the fixed bracket 1 is fixed to the ground with expansion screws. The speed encoder 35 is installed on the encoder fixing bracket 3 to perform speed measurement.

[0047] In summary, this utility model, by having the rubber-coated wheel 24 contact the drum, drives the rotating shaft 21 to rotate through friction, which in turn drives the rotating cam 23 and the shaft coupling 25 to rotate. The shaft coupling 25 is softly connected to the encoder coupling 34, ultimately driving the speed encoder 35 to operate. This effectively solves the problem of low accuracy, large error, and easy speed loss caused by attaching magnets and installing Hall sensors around the drum. It can greatly improve the safety and stability of the hoist operation.

[0048] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An elevator drum speed detection device, characterized by include: Rubber-coated wheel (24) makes frictional contact with the inner wall of the elevator drum; The rotating mechanism (2) includes a rotating shaft (21), bearing seats (22), a rotating cam (23), and a fixed bracket (1). Two bearing seats (22) are provided and are arranged opposite to each other on the rotating shaft (21). Two rotating cams (23) are provided and are arranged opposite to each other between the two bearing seats (22). One end of the rotating shaft (21) is connected to a rubber-coated wheel (24), and a shaft coupling (25) is fixedly installed at the other end. The rotating cam (23) is rotatably connected to the fixed bracket (1). A speed encoder (35) is used to detect the speed of the hoist drum. The speed encoder (35) is connected to the shaft coupling (25) via a shaft encoder coupling (34).

2. A hoist drum speed detection device according to claim 1, characterised in that, It also includes a tensioning mechanism (4), which includes a support frame (41), a tension spring (42), and an adjusting plate (12) fixedly installed on a fixed bracket (1). The support frame (41) is fixedly connected to the rotating shaft (21) and is located between two rotating cams (23). The two ends of the tension spring (42) are detachably connected to the support frame (41) and the adjusting plate (12), respectively.

3. A hoist drum speed detection device according to claim 2, characterised in that, The support frame (41) includes a support plate (43) and connecting plates (44) disposed opposite to each other on the support plate (43). The two connecting plates (44) are respectively fixedly connected to two rotating cams (23).

4. A hoist drum speed detection device according to claim 3, characterised in that, The support plate (43) is provided with a ring (431), the adjustment plate (12) is provided with a strip hole (121), a threaded rod (122) is fixedly connected in the strip hole (121), and the two ends of the tension spring (42) are detachably connected to the strip hole (121) and the threaded rod (122) respectively.

5. A hoist drum speed detection device as claimed in claim 1, wherein, The rubber-coated wheel (24) is fixedly connected to the rotating shaft (21) by a fastening screw (27). A positioning bushing (26) is fixed to the end of the rubber-coated wheel (24) away from the fixing screw. The positioning bushing (26) is sleeved on the rotating shaft (21).

6. A hoist drum speed detection device as claimed in claim 1, wherein, The encoder coupling (34) and the shaft coupling (25) are each provided with a disc at their adjacent ends. The two discs are connected by a number of steel wires, which are evenly distributed around the edges of the two discs.

7. A hoist drum speed detection device as claimed in claim 2, wherein The fixed bracket (1) includes a base plate (13) and two mounting brackets (14) fixedly connected to the base plate (13). The two mounting brackets (14) are arranged opposite to each other, and a fixed shaft (11) is provided between the tops of the two mounting brackets (14). The adjusting plate (12) is fixedly connected to the two mounting brackets (14), and the rotating cam (23) is rotatably connected to the fixed shaft (11).

8. A hoist drum speed detection device according to claim 7, characterised in that, A cam positioning plate (15) is also fixedly connected between the two mounting brackets (14), and the cam positioning plate (15) contacts the rotating cam (23).

9. A hoist drum speed detection device according to claim 8, characterised in that, One end of the fixed shaft (11) is connected to the mounting bracket (14) via a positioning pin (111), and the other end of the fixed shaft (11) is fixedly connected to the mounting bracket (14) via a fixing nut (112).

10. The hoist drum speed detection device according to claim 1, characterized in that, It also includes an encoder mounting bracket (3), the speed encoder (35) is mounted on the outside of the encoder mounting bracket (3), the shaft of the speed encoder (35) passes through the outside of the encoder mounting bracket (3) and is fixedly connected to the encoder coupling (34), the encoder mounting bracket (3) is fixedly connected to the rotating mechanism (2), the encoder mounting bracket (3) includes a fixing plate (31) and a first mounting plate (32) and a second mounting plate (33) disposed opposite to each other on the fixing plate (31), the first mounting plate (32) is fixedly connected to the rotating cam (23), and the second mounting plate (33) is connected to the encoder coupling (34).

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