Rotating speed measuring device based on Hall sensor

Abstract

The utility model relates to the technical field of rotating speed detectors, in particular to a rotating speed measuring device based on a Hall sensor. According to the technical scheme, the device comprises a shell, the center of the shell is rotationally connected with a transmission shaft, the outer wall of the transmission shaft is fixedly connected with a signal panel, the signal panel is arranged on the inner wall of the shell, one side of the shell is fixedly connected with a fixed seat, and a detection head is inserted into the inner wall of the fixed seat. When a ratchet wheel is rotated, two groups of sliding rods and arc-shaped plates are driven to slide towards the center at the same time until the inner walls of the two groups of arc-shaped plates are clamped on the outer wall of a detection head, and two groups of limiting rings are matched to further fix the position of the detection head, so that the detection head is stably mounted, and the swinging of the detection head caused by vibration is effectively counteracted; therefore, the installation stability of the detection head is improved, and the problem that the measurer is easy to be affected by vibration and deviates is solved.

Description

Technical Field

[0001] This utility model relates to the field of speed detector technology, and in particular to a speed measurement device based on a Hall sensor. Background Technology

[0002] A Hall effect speed sensor is a speed measurement device based on the Hall effect. It contains a Hall element that generates a Hall voltage when a magnetic field approaches. When measuring speed, a magnetic disk or gear is usually mounted on the rotating shaft. As the disk or gear rotates with the shaft, its teeth or magnetic poles alternately pass through the Hall sensor, causing the magnetic field around the Hall sensor to change periodically, thereby generating a periodic Hall voltage pulse signal. By measuring the number of pulses per unit time, the speed of the rotating shaft can be calculated.

[0003] In the prior art, when measuring the rotational speed of a vehicle's output shaft, the vehicle's drive shaft vibrates during rotation, which affects the speed measuring device installed on the vehicle. Over time, this can easily cause the position of the speed measuring device to shift, resulting in measurement errors. Therefore, this application proposes a speed measuring device based on a Hall sensor. Utility Model Content

[0004] The purpose of this invention is to address the problem in the prior art where measuring instruments are easily affected by vibration, leading to deviation, and to propose a rotational speed measuring device based on a Hall sensor.

[0005] The technical solution of this utility model is as follows: A speed measuring device based on a Hall sensor includes a housing, a drive shaft rotatably connected to the center of the housing, a signal disk fixed to the outer wall of the drive shaft, the signal disk being disposed on the inner wall of the housing, a fixed seat fixed to one side of the housing, a detection head inserted into the inner wall of the fixed seat, a transmission line fixed to one end of the detection head, a ratchet rotatably connected to the outer wall of the fixed seat, an arc-shaped groove formed on one side of the ratchet, a round rod slidably connected to the inner wall of the arc-shaped groove, a sliding rod fixed to one side of the round rod, an arc-shaped plate fixed to the top of the sliding rod, two sets of the round rod, the sliding rod, and the arc-shaped plate being arranged symmetrically on one side of the ratchet, a limiting component for limiting the movement of the sliding rod being provided on one side of the housing, and a positioning component for fixing the position of the ratchet being provided on one side of the housing.

[0006] Optionally, the limiting component includes a connecting block, which is fixedly connected to one side of the housing, and a limiting sleeve is fixedly connected to one side of the connecting block. The sliding rod is slidably connected to the inner wall of the limiting sleeve.

[0007] Optionally, the positioning component includes a limiting rod, which is fixed to one side of the housing. One end of the limiting rod is fixed to a side plate, and one side of the side plate is fixed to a spring. The end of the spring away from the side plate is fixed to a mounting frame. The inner wall of the mounting frame is provided with ratchet teeth, which are located on one side of a ratchet wheel. One side of the mounting frame is fixed to a sliding sleeve, which is slidably connected to the outer wall of the limiting rod.

[0008] Optionally, the limiting rod is square in shape, and the sliding sleeve is square in shape.

[0009] Optionally, a push plate is fixed to the side of the sliding sleeve away from the mounting frame, and the push plate is circular in shape.

[0010] Optionally, a pad is fixed to the inner wall of the arc-shaped plate. The pad is made of rubber and is arc-shaped.

[0011] Optionally, a side block is fixed to the end of the round rod away from the slide bar, and the side block is circular in shape.

[0012] Optionally, a limiting ring is fixed to the outer wall of the detection head, and two sets of the limiting ring are provided and distributed in parallel on the outer wall of the detection head, with the arc-shaped plate disposed between the two sets of limiting rings.

[0013] Compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0014] This solution uses two sets of sliding rods and arc-shaped plates. When the ratchet is rotated, the two sets of sliding rods and arc-shaped plates slide towards the center simultaneously until the inner walls of the two sets of arc-shaped plates clamp the outer wall of the detection head. At the same time, two sets of limiting rings further fix the position of the detection head, making the detection head installation stable and effectively counteracting the swaying of the detection head when subjected to vibration. This improves the stability of the detection head installation and solves the problem of the measuring instrument being easily affected by vibration and thus causing displacement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a speed measurement device based on a Hall sensor;

[0016] Figure 2 This is a schematic cross-sectional view of a rotational speed measuring device based on a Hall sensor.

[0017] Figure 3 for Figure 2 A magnified structural diagram at point A;

[0018] Figure 4 This is a schematic diagram of the separation structure of the detection head and ratchet.

[0019] Figure 5 This is a schematic diagram of the limit component structure;

[0020] Figure 6 This is a schematic diagram of the positioning component structure.

[0021] Reference numerals in the attached drawings: 1. Housing; 2. Drive shaft; 3. Signal disc; 4. Fixing base; 5. Detection head; 6. Transmission line; 7. Ratchet; 8. Arc groove; 9. Round rod; 10. Slide rod; 11. Arc plate; 12. Connecting block; 13. Limiting sleeve; 14. Limiting rod; 15. Side plate; 16. Spring; 17. Slide sleeve; 18. Mounting frame; 19. Ratchet; 20. Push plate; 21. Pad plate; 22. Side block; 23. Limiting ring. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-6 As shown, the present invention proposes a rotational speed measuring device based on a Hall sensor, comprising a housing 1, a drive shaft 2 rotatably connected to the center of the housing 1, a signal disk 3 fixedly connected to the outer wall of the drive shaft 2, the signal disk 3 being disposed on the inner wall of the housing 1, a fixed seat 4 fixedly connected to one side of the housing 1, a detection head 5 inserted into the inner wall of the fixed seat 4, a transmission line 6 fixedly connected to one end of the detection head 5, a ratchet 7 rotatably connected to the outer wall of the fixed seat 4, an arc-shaped groove 8 formed on one side of the ratchet 7, a round rod 9 slidably connected to the inner wall of the arc-shaped groove 8, a sliding rod 10 fixedly connected to one side of the round rod 9, and an arc-shaped plate 11 fixedly connected to the top end of the sliding rod 10. Two sets of the round rod 9, the sliding rod 10, and the arc-shaped plate 11 are provided, symmetrically distributed vertically on one side of the ratchet 7. A limiting component for limiting the movement of the sliding rod 10 is provided on one side of the housing 1, and a positioning component for fixing the position of the ratchet 7 is provided on another side of the housing 1.

[0024] To address the issue of the measuring instrument being easily affected by vibration and causing offset, when it is necessary to detect the rotational speed of the vehicle's output shaft, the detection head 5 can be inserted into the inner wall of the fixed base 4, keeping the end of the detection head 5 positioned on one side of the signal disk 3. Then, the ratchet 7 is rotated. As the ratchet 7 rotates, the arc-shaped grooves 8 rotate along with it. The rotation of the two sets of arc-shaped grooves 8 drives the two sets of round rods 9 to move towards the center. By setting a limiting component, the movement trajectory of the two sets of sliding rods 10 and the arc-shaped plate 11 can be limited. The movement of the two sets of round rods 9 towards the center drives the two sets of arc-shaped plates 11 to move towards the center. Two sets of arc-shaped plates 11 clamp the detection head 5. By setting a positioning component, the position of the ratchet 7 can be fixed to prevent the ratchet 7 from rotating in the opposite direction, thereby fixing the position of the detection head 5 and effectively counteracting the swaying caused by vibration when the detection head 5 is subjected to vibration, thus improving the stability of the installation of the detection head 5. When detecting the rotation speed, the signal disk 3 will be driven to rotate synchronously with the output shaft through the transmission shaft 2. When the signal disk 3 rotates, the detection head 5 on one side can collect the pulse signal of the rotation cycle of the signal disk 3, and transmit the signal to the equipment for analysis through the transmission line 6, so as to facilitate the calculation of the rotation speed of the output shaft.

[0025] like Figure 5 The limiting component includes a connecting block 12, which is fixedly connected to one side of the outer casing 1. A limiting sleeve 13 is fixedly connected to one side of the connecting block 12, and the slide rod 10 is slidably connected to the inner wall of the limiting sleeve 13. By providing the connecting block 12, the limiting sleeve 13 can be easily installed on the outer wall of the slide rod 10. When the slide rod 10 moves, it will slide on the inner wall of the limiting sleeve 13, thereby facilitating the limitation of the movement trajectory of the slide rod 10 and the arc plate 11 by means of the limiting sleeve 13.

[0026] like Figure 6 The positioning component includes a limiting rod 14, which is fixedly connected to one side of the housing 1. One end of the limiting rod 14 is fixedly connected to a side plate 15, and a spring 16 is fixedly connected to one side of the side plate 15. The end of the spring 16 away from the side plate 15 is fixedly connected to a mounting frame 18. The inner wall of the mounting frame 18 is provided with ratchet 19, which is located on one side of the ratchet 7. A sliding sleeve 17 is fixedly connected to one side of the mounting frame 18, and the sliding sleeve 17 is slidably connected to the outer wall of the limiting rod 14.

[0027] When the ratchet 7 rotates to one side, the characteristics of the ratchet 19 allow the protruding teeth on the ratchet 7 to pass through the ratchet 19, preventing the ratchet 7 from rotating in the opposite direction. This fixes the position of the ratchet 7 after rotation and also fixes the positions of the two sets of sliding rods 10 and the arc plate 11, ensuring the detection head 5 is securely installed. When it is necessary to release the fixation of the detection head 5, the mounting frame 18 can be pulled to one side and the spring 16 can be squeezed. As the mounting frame 18 moves, the sliding sleeve 17 can slide on the outer wall of the limiting rod 14 until the ratchet 19 in the mounting frame 18 is moved away from one side of the ratchet 7. At this point, the ratchet 7 can be rotated in the opposite direction to remove the detection head 5.

[0028] like Figure 6 The limiting rod 14 is square in shape, and the sliding sleeve 17 is square in shape. When the sliding sleeve 17, the mounting frame 18 and the ratchet 19 slide, the square sliding sleeve 17 can slide on the square limiting rod 14 to maintain the horizontal position of the mounting frame 18 and the ratchet 19.

[0029] like Figure 6 A push plate 20 is fixedly connected to the side of the sliding sleeve 17 away from the mounting frame 18, and the push plate 20 is circular in shape.

[0030] By providing a circular push plate 20 on one side of the slide sleeve 17, when it is necessary to pull the mounting frame 18 and the ratchet 19 to one side, it is convenient to move the mounting frame 18 and the ratchet 19 to one side by pushing the circular push plate 20.

[0031] like Figure 5 The inner wall of the arc-shaped plate 11 is fixed with a pad 21, the pad 21 is made of rubber and the pad 21 is arc-shaped.

[0032] By providing a rubber pad 21 on the inner wall of the arc plate 11, the connection between the arc plate 11 and the detection head 5 can be protected when the two sets of arc plates 11 fix the position of the detection head 5.

[0033] like Figure 5 The end of the round rod 9 away from the slide rod 10 is fixedly connected to a side block 22, which is circular in shape.

[0034] By setting a side block 22 on one side of the round rod 9, the round rod 9 can slide on the inner wall of the arc groove 8, and the side block 22 can be used to prevent the round rod 9 from deviating when it slides.

[0035] like Figure 3 and Figure 4 The outer wall of the detection head 5 is fixed with a limiting ring 23. Two sets of limiting rings 23 are provided and are distributed in parallel on the outer wall of the detection head 5. The arc plate 11 is disposed between the two sets of limiting rings 23.

[0036] By setting two sets of parallel limiting rings 23 on the outer wall of the detection head 5, the position of the detection head 5 can be further fixed by the two sets of limiting rings 23 when the two sets of arc plates 11 are clamped on the outer wall of the detection head 5.

[0037] In this embodiment, to address the issue of the measuring instrument being easily affected by vibration and causing offset, when it is necessary to detect the rotational speed of the vehicle's output shaft, the detection head 5 can be inserted into the inner wall of the fixed base 4, keeping the end of the detection head 5 on one side of the signal disk 3. Then, the ratchet 7 is rotated. When the ratchet 7 rotates, the arc-shaped grooves 8 rotate along with it. The rotation of the two sets of arc-shaped grooves 8 drives the two sets of round rods 9 to move towards the center. The limiting sleeve 13 limits the movement trajectory of the slide rod 10 and the arc-shaped plate 11. The two sets of round rods 9 move towards the center... When the ratchet 7 rotates to one side, the two sets of arc-shaped plates 11 move towards the center, clamping the detection head 5. The pad 21 protects the connection between the arc-shaped plates 11 and the detection head 5. When the two sets of arc-shaped plates 11 are clamped on the outer wall of the detection head 5, they work in conjunction with the two sets of limiting rings 23 to further fix the position of the detection head 5. When the ratchet 7 rotates to one side, the characteristics of the ratchet teeth 19 allow the protruding teeth on the ratchet 7 to pass through the ratchet teeth 19, preventing the ratchet 7 from rotating in the opposite direction. This fixes the position of the ratchet 7 after rotation and simultaneously allows for the adjustment of the two... The positions of the sliding rod 10 and the arc plate 11 are fixed to ensure the stable installation of the detection head 5, effectively counteracting the swaying of the detection head 5 when subjected to vibration, thereby improving the stability of the detection head 5 installation. The limit rod 14 is square in shape, which allows the square sliding sleeve 17 to slide on the square limit rod 14 when the sliding sleeve 17, the mounting frame 18, and the ratchet 19 slide, thus maintaining the horizontal position of the mounting frame 18 and the ratchet 19. When detecting the rotational speed, the signal disk 3 will be driven to rotate synchronously with the output shaft through the transmission shaft 2. When the signal disk 3 rotates, it can... The detection head 5 on one side can collect the pulse signal of the rotation cycle of the signal disk 3 and transmit the signal to the equipment for analysis through the transmission line 6, so as to calculate the rotation speed of the output shaft. When it is necessary to release the fixation of the detection head 5, the push plate 20 can be pushed to pull the sliding sleeve 17 and the mounting frame 18 to one side and squeeze the spring 16. When the mounting frame 18 moves, the sliding sleeve 17 can be driven to slide on the outer wall of the limit rod 14 until the ratchet 19 in the mounting frame 18 is removed from one side of the ratchet 7. At this time, the ratchet 7 can be rotated in the opposite direction to remove the detection head 5.

[0038] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A rotational speed measuring device based on a Hall sensor, comprising a housing (1), characterized in that: A drive shaft (2) is rotatably connected to the center of the outer casing (1). A signal disk (3) is fixed to the outer wall of the drive shaft (2). The signal disk (3) is located on the inner wall of the outer casing (1). A fixed seat (4) is fixed to one side of the outer casing (1). A detection head (5) is inserted into the inner wall of the fixed seat (4). A transmission line (6) is fixed to one end of the detection head (5). A ratchet (7) is rotatably connected to the outer wall of the fixed seat (4). An arc-shaped groove (8) is provided on one side of the ratchet (7). A round rod (9) is slidably connected to the inner wall of the groove (8). A slide rod (10) is fixed to one side of the round rod (9). An arc plate (11) is fixed to the top of the slide rod (10). Two sets of the round rod (9), slide rod (10) and arc plate (11) are provided and are symmetrically distributed on one side of the ratchet (7). A limiting component for limiting the movement of the slide rod (10) is provided on one side of the outer shell (1). A positioning component for fixing the position of the ratchet (7) is provided on one side of the outer shell (1).

2. A rotational speed measuring device based on a Hall sensor according to claim 1, characterized in that The limiting component includes a connecting block (12), which is fixed to one side of the outer shell (1). A limiting sleeve (13) is fixed to one side of the connecting block (12), and the slide rod (10) is slidably connected to the inner wall of the limiting sleeve (13).

3. A rotational speed measuring device based on a Hall sensor according to claim 2, characterized in that The positioning assembly includes a limiting rod (14), which is fixed to one side of the housing (1). One end of the limiting rod (14) is fixed to a side plate (15), and one side of the side plate (15) is fixed to a spring (16). The end of the spring (16) away from the side plate (15) is fixed to a mounting frame (18). The inner wall of the mounting frame (18) is provided with ratchet teeth (19), which are located on one side of a ratchet wheel (7). One side of the mounting frame (18) is fixed to a sliding sleeve (17), which is slidably connected to the outer wall of the limiting rod (14).

4. A rotational speed measuring device based on a Hall sensor according to claim 3, characterized in that The limiting rod (14) is square in shape, and the sliding sleeve (17) is square in shape.

5. A rotational speed measuring device based on a Hall sensor according to claim 4, characterized in that A push plate (20) is fixed to the side of the sliding sleeve (17) away from the mounting frame (18), and the push plate (20) is circular in shape.

6. A rotational speed measuring device based on a Hall sensor according to claim 5, characterized in that The inner wall of the arc plate (11) is fixed with a pad (21), the pad (21) is made of rubber and the shape of the pad (21) is arc.

7. A rotational speed measuring device based on a Hall sensor according to claim 6, characterized in that The end of the round rod (9) away from the slide rod (10) is fixed with a side block (22), which is circular in shape.

8. A rotational speed measuring device based on a Hall sensor according to claim 7, characterized in that The outer wall of the detection head (5) is fixed with a limiting ring (23). There are two sets of limiting rings (23) and they are distributed in parallel on the outer wall of the detection head (5). The arc plate (11) is disposed between the two sets of limiting rings (23).

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