Hall rotating speed sensor
By using a dual Hall chip design and an odd-numbered tooth structure Hall speed sensor, the problems of narrow application range and low measurement accuracy of existing Hall speed sensors are solved, and efficient and reliable magnetic field detection and signal output are achieved.
Patent Information
- Application Number
- CN202520738948.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-04-18
AI Technical Summary
Existing Hall effect speed sensors have a narrow range of applications, low measurement accuracy, weak anti-interference ability, and are prone to tooth loss and signal loss.
The system employs a dual Hall chip design, with a permanent magnet mounting bracket to fix the Hall chip. Combined with a magnetically guided speed measuring disc with an odd number of teeth, it forms a stable magnetic field detection system. Screws are used to connect the components to improve stability and signal output.
It improves the accuracy of magnetic field detection and the stability of signal output, enhances anti-interference capabilities, simplifies the assembly process, and increases production efficiency and product qualification rate.
Smart Images
Figure CN223756759U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to sensor technical field especially relates to a hall rotation speed sensor. BACKGROUND
[0002] The existing rotation speed sensor is a long rectangular cylinder as a whole, the shell is a copper round pipe shell, and the hall chip, permanent magnet and circuit board are built-in. The measured gear is a magnetic conductive material. When the gear rotates, the magnetic field generated by the permanent magnet changes. The hall chip detects the change of the magnetic field and outputs the current or voltage signal. After integration by the circuit board, the signal is outputted externally. However, the rotation speed sensor with this structure has two shortcomings.
[0003] Firstly, the application range is narrow. The existing hall rotation speed sensor has limitations and cannot adapt to all wheels. It can only detect the rotation speed of the gear adapted to the hall rotation speed sensor.
[0004] Secondly, the reliability is low, the measurement accuracy is limited, and the anti-interference ability is weak. The existing hall rotation speed sensor is a single-channel input and output, which is prone to missing teeth and signal loss. SUMMARY
[0005] The utility model provides a hall rotation speed sensor aiming at the defects in the prior art.
[0006] To achieve the above object, the utility model adopts the following technical scheme. A hall rotation speed sensor comprises a rotation speed sensor outer protective cover, a speed measuring tooth disc and a hall induction assembly. The rotation speed sensor outer protective cover is fixed on the rotation speed sensor outer protective cover screw fixing hole on the speed measuring tooth disc through rotation speed sensor outer protective cover fixing screws. The speed measuring tooth disc is fixed on the speed measuring tooth disc screw fixing hole on the external hub through speed measuring tooth disc fixing screws. The hall induction assembly is fixed on the hall induction assembly screw fixing hole on the external wheel shaft bearing end cover through hall induction assembly fixing screws.
[0007] Further, the hall induction assembly comprises a permanent magnet one fixed on a permanent magnet fixing bracket one, and a permanent magnet two fixed on a permanent magnet fixing bracket two. The permanent magnet fixing bracket one is in contact with the pins of the hall chip one for fixing the pins. The permanent magnet fixing bracket two is in contact with the pins of the hall chip two for fixing the pins. The pins of the hall chip one and the hall chip two pass through the PCB board and are welded with the PCB board. The PCB board is connected with the hall chip one and the hall chip two for signal conditioning.
[0008] Further, the pins of the hall chip one and the hall chip two are bent by 90° and placed close to the bottom surface of the hall induction assembly. The pins of the hall chip one are tightly fixed through the permanent magnet fixing bracket one. The pins of the hall chip two are tightly fixed through the permanent magnet fixing bracket two.
[0009] Further, the speed measuring disc is a single tooth structure and is made of magnetic conductive material, and is used for fixed connection with the external wheel hub and rotates with the wheel hub.
[0010] Further, the speed sensor outer protective cover is connected with the speed measuring disc through a speed sensor outer protective cover fixing screw, and is used for protecting the internal components.
[0011] Further, the Hall induction assembly is connected with the external wheel shaft bearing end cover through a Hall induction assembly fixing support, and is used for fixing the Hall induction assembly.
[0012] Further, the Hall induction assembly cable is connected with the PCB, and is used for outputting the conditioned signal to the external equipment.
[0013] Further, the permanent magnet one is connected with the Hall induction assembly through a permanent magnet fixing support one, and is used for generating a magnetic field; and the permanent magnet two is connected with the Hall induction assembly through a permanent magnet fixing support two, and is used for generating a magnetic field.
[0014] Further, the Hall chip one and the Hall chip two are connected with the Hall induction assembly cable through the PCB, and are used for outputting two groups of signals with a period difference of 1 / 2.
[0015] Further, the speed measuring disc and the Hall induction assembly are oppositely arranged, the speed measuring disc cuts the magnetic fields generated by the permanent magnet one and the permanent magnet two when rotating, and the Hall chip one and the Hall chip two sense the change of the magnetic field and output signals.
[0016] Compared with the prior art, the Hall speed sensor has the beneficial effects.
[0017] The Hall speed sensor comprises an outer protective cover, an internal speed measuring disc and a Hall induction assembly, and forms a new type of Hall speed sensor which is efficient and reliable.
[0018] 1. The built-in double Hall chips (Hall chip one and Hall chip two) and the unique fixing mode (through the permanent magnet fixing support one and two) not only improve the accuracy of magnetic field detection, but also enhance the stability of signal output and anti-interference ability, effectively avoiding the tooth loss phenomenon and signal loss problem.
[0019] 2. The components of the sensor such as the outer protective cover, the speed measuring disc and the Hall induction assembly are stably connected through screws and the like, which simplifies the assembly process, is convenient for maintenance and replacement, and greatly improves the production efficiency and product qualification rate.
[0020] 3. The speed measuring disc made of magnetic conductive material and having a single tooth structure makes the Hall speed sensor flexible to adapt to the installation requirements of various types of wheel hubs. BRIEF DESCRIPTION OF DRAWINGS
[0021] The utility model makes further explanation to the utility model below combining with the drawings and specific embodiment. The utility model protection scope is not only limited to the following content's expression.
[0022] Figures 1-2 It is the whole structure schematic diagram of the rotating speed sensor.
[0023] Figures 3-4 It is the component explosion map of the rotating speed sensor.
[0024] Figure 5 It is the double channel schematic diagram of the sensor. Specific embodiment
[0025] In order to make the purpose, technical scheme and beneficial effect of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be clearly and completely described below combining with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment.
[0026] As Figures 1-5 Shown, Hall rotating speed sensor includes rotating speed sensor outer protective cover 2, speed measuring fluted disc 4, Hall induction assembly 5;Wherein, rotating speed sensor outer protective cover 2 is fixed on the rotating speed sensor outer protective cover screw fixing hole 402 on speed measuring fluted disc 4 through rotating speed sensor outer protective cover fixed screw 201;Speed measuring fluted disc 4 is fixed on the speed measuring fluted disc screw fixing hole 302 on the external hub through the speed measuring fluted disc fixed screw 401;Hall induction assembly 5 is fixed on the Hall induction assembly screw fixing hole 303 on the external wheel shaft bearing end cover through Hall induction assembly fixed screw 503.
[0027] Preferably, Hall induction assembly 5 includes permanent magnet one 504 fixed on permanent magnet fixed support one 506, permanent magnet two 505 fixed on permanent magnet fixed support two 507, wherein, permanent magnet fixed support one 506 contacts the pin of Hall chip one 508, for fixing pin;Permanent magnet fixed support two 507 contacts the pin of Hall chip two 509, for fixing pin;The pin of Hall chip one 508 and Hall chip two 509 all passes through PCB board 510 and is welded with PCB board 510;And PCB board 510 is connected with Hall chip one 508 and Hall chip two 509 respectively, for conditioning signal.
[0028] Preferably, the pin of Hall chip one 508 and the pin of Hall chip two 509 are placed closely after bending 90 ° the bottom surface of Hall induction assembly 5, Hall chip one 508 pin is fixed by permanent magnet fixed support one 506 tightly, and Hall chip two 509 pin is fixed by permanent magnet fixed support two 507 tightly.
[0029] Preferably, the speed measuring disc 4 is a single-tooth structure made of magnetic conductive material, which is fixedly connected with the outer hub and rotates with the hub.
[0030] Preferably, the outer protective cover 2 of the rotation speed sensor is connected with the speed measuring disc 4 through the rotation speed sensor outer protective cover fixing screw 201, for protecting the internal components.
[0031] Preferably, the Hall induction assembly 5 is connected with the outer axle bearing end cover through the Hall induction assembly fixing support 501, for fixing the Hall induction assembly 5.
[0032] Preferably, the Hall induction assembly cable 502 is connected with the PCB board 510, for outputting the conditioned signals to the external equipment.
[0033] Preferably, the permanent magnet one 504 is connected with the Hall induction assembly 5 through the permanent magnet fixing support one 506, for generating a magnetic field; the permanent magnet two 505 is connected with the Hall induction assembly 5 through the permanent magnet fixing support two 507, for generating a magnetic field.
[0034] Preferably, the Hall chip one 508 and the Hall chip two 509 are connected with the Hall induction assembly cable 502 through the PCB board 510, for outputting two groups of signals with a period difference of 1 / 2.
[0035] Preferably, the speed measuring disc 4 is arranged opposite to the Hall induction assembly 5, the speed measuring disc 4 cuts the magnetic field generated by the permanent magnet one 504 and the permanent magnet two 505 when rotating, and the Hall chip one 508 and the Hall chip two 509 sense the change of the magnetic field and output signals.
[0036] In the embodiment 1, the structure of the Hall rotation speed sensor includes the outer protective cover 2 of the rotation speed sensor, the rotation speed sensor outer protective cover fixing screw 201 and the speed measuring disc 4. The speed measuring disc 4 and the outer protective cover 2 of the rotation speed sensor are internally provided with the speed measuring disc fixing screw 401, the rotation speed sensor outer protective cover screw fixing hole 402, the Hall induction assembly 5, the Hall induction assembly fixing support 501, the Hall induction assembly cable 502 and the Hall induction assembly fixing screw 503. The Hall induction assembly 5 is internally provided with the permanent magnet one 504, the permanent magnet two 505, the permanent magnet fixing support one 506, the permanent magnet fixing support two 507, the Hall chip one 508, the Hall chip two 509 and the PCB board 510.
[0037] The assembly of the Hall induction assembly 5: first, the Hall chip one 508 and the Hall chip two 509 are bent by 90° at the appropriate position, then the Hall chip one 508 and the Hall chip two 509 are placed close to the bottom surface, then the circuit board 510 is fixed inside the Hall induction assembly 5 after passing through the pins of the Hall chip one 508 and the Hall chip two 509, then the pins of the PCB board 510, the Hall chip one 508 and the Hall chip two 509 are welded together using an electric soldering iron, then the permanent magnet fixing bracket one 506 and the permanent magnet fixing bracket two 507 are placed to press the bent pins of the Hall chip one 508 and the Hall chip two 509 to prevent them from being raised, and finally the permanent magnet one 504 and the permanent magnet two 505 are fixed on the permanent magnet fixing bracket one 506 and the permanent magnet fixing bracket two 507 respectively using glue.
[0038] The assembly of the rotation speed sensor: first, the speed measuring toothed disc 4 is fixed on the speed measuring toothed disc screw fixing hole 302 on the wheel hub 3 through the speed measuring toothed disc fixing screw 401; then the Hall induction assembly 5 is fixed on the Hall induction assembly screw fixing hole 303 on the wheel shaft bearing end cover 301 through the Hall induction assembly fixing screw 503; finally, the rotation speed sensor outer protective cover 2 is fixed to the rotation speed sensor outer protective cover screw fixing hole 402 on the speed measuring toothed disc 4 through the rotation speed sensor outer protective cover fixing screw 201.
[0039] The working of the rotation speed sensor: when the tire 1 rotates, the wheel hub 3 rotates together, and the speed measuring toothed disc 4 and the rotation speed sensor outer protective cover 2 connected thereto rotate together; the wheel shaft bearing end cover 301 is stationary, and the Hall induction assembly 5 connected thereto is stationary. The permanent magnet one 504 and the permanent magnet two 505 generate magnetic fields respectively, the speed measuring toothed disc 4 is a single-toothed disc and is a magnetic conductive material, the speed measuring toothed disc 4 rotates to cut the magnetic induction lines, causing the change of the magnetic field, the Hall chip one 508 and the Hall chip two 509 respectively sense the change of the magnetic field, thereby outputting two groups of signals with a period difference of 1 / 2, and after being conditioned by the PCB board 510, the two groups of signals with a period difference of 1 / 2 are outputted to the outside through the Hall induction assembly cable 503.
[0040] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "preferred embodiment", "specific implementation", or "preferred implementation" 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 application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0041] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that; it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; therefore, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope defined by the present application claims.
Claims
1. A Hall rotation speed sensor, comprising a rotation speed sensor outer protective cover (2), a speed measuring toothed disc (4), a Hall induction assembly (5); characterized in that, Wherein, The rotation speed sensor outer protective cover (2) is fixed on the rotation speed sensor outer protective cover screw fixing hole (402) on the speed measuring fluted disc (4) through the rotation speed sensor outer protective cover fixing screw (201); The speed measuring fluted disc (4) is fixed on the speed measuring fluted disc screw fixing hole (302) on the outer hub through the speed measuring fluted disc fixing screw (401); The Hall induction assembly (5) is fixed on the Hall induction assembly screw fixing hole (303) on the outer axle bearing end cover through the Hall induction assembly fixing screw (503).
2. The Hall speed sensor according to claim 1, characterized in that The Hall induction assembly (5) includes a permanent magnet one (504) fixed on a permanent magnet fixed support one (506) and a permanent magnet two (505) fixed on a permanent magnet fixed support two (507), wherein the permanent magnet fixed support one (506) is in contact with the pins of the Hall chip one (508) for fixing the pins, the permanent magnet fixed support two (507) is in contact with the pins of the Hall chip two (509) for fixing the pins, the pins of the Hall chip one (508) and the Hall chip two (509) pass through the PCB board (510) and are welded with the PCB board (510), and the PCB board (510) is connected with the Hall chip one (508) and the Hall chip two (509) for signal conditioning.
3. The Hall speed sensor according to claim 2, characterized in that The pins of the Hall chip one (508) and the Hall chip two (509) are bent by 90° and placed close to the bottom surface of the Hall induction assembly (5), the pins of the Hall chip one (508) are tightly fixed through the permanent magnet fixed support one (506), and the pins of the Hall chip two (509) are tightly fixed through the permanent magnet fixed support two (507).
4. The Hall speed sensor according to claim 1, characterized in that The speed measuring fluted disc (4) is a single-tooth structure and is made of a magnetic conductive material, and is used for fixed connection with the outer hub and rotation with the hub.
5. The Hall speed sensor of claim 2, wherein, The PCB board (510) is connected with the Hall induction assembly cable (502) for outputting the conditioned signal to an external device.
6. The Hall speed sensor of claim 2, wherein, The Hall chip one (508) and the Hall chip two (509) are connected with the Hall induction assembly cable (502) through the PCB board (510) for outputting two groups of signals with a period difference of 1 / 2.
7. The Hall speed sensor according to claim 2, characterized in that The speed measuring fluted disc (4) is arranged opposite to the Hall induction assembly (5), the speed measuring fluted disc (4) cuts the magnetic field generated by the permanent magnet one (504) and the permanent magnet two (505) when rotating, and the Hall chip one (508) and the Hall chip two (509) sense the change of the magnetic field and output signals.