A structure of a hall type speed sensor for a locomotive

Abstract

The utility model discloses a locomotive hall formula speed sensor structure, include: plane tooth and a plurality of hall chip module, plane tooth includes first gear ring and second gear ring, a plurality of hall chip module even setting along the axial direction of plane tooth, the spacing of a plurality of hall chip module and plane tooth is less than or equal to 0.7mm. The sensor structure sets up along the radial direction of plane tooth to the original hall chip module instead of setting up hall chip module along the axial direction of plane tooth, compresses the radial space of plane tooth occupied, need not change the original axle box structure, utilizes the original car photoelectric sensor installation interface and this hall formula speed sensor connection, can be compatible with the existing installation interface, also avoided reducing the sampling accuracy of sensor, realize radial distribution multiple gear ring, thereby realize the simultaneous output of multiple different signals, simultaneously, make the detection distance of this sensor increase to 0.7mm, satisfy the demand of vehicle to multiple information.

Description

Technical Field

[0001] This utility model belongs to the field of Hall effect speed sensor technology, specifically a Hall effect speed sensor structure for locomotives. Background Technology

[0002] Hall effect speed sensors are magnetoelectric sensors based on the Hall effect. They have advantages such as high sensitivity to magnetic fields, stable output signals, and strong anti-interference capabilities, and are widely used in many fields to measure speed. Currently, the Hall effect speed sensors used in the new generation of railway locomotive systems are non-contact. However, the locomotive axle ends are not equipped with speed measuring gears and sensor mounting interfaces at the factory, so the axle ends need to be modified to accommodate the installation and application of the Hall effect speed sensor.

[0003] Chinese patent CN208833795U discloses a Hall effect speed sensor that requires no modification to the locomotive. The Hall effect speed sensor can be directly installed at the original location of the photoelectric speed sensor on the locomotive axle, saving modification costs and offering convenient and quick installation. However, while this Hall effect speed sensor can be directly installed at the original location of the photoelectric speed sensor on the locomotive axle, the Hall chip module is positioned radially along the planar teeth. This results in excessive space occupied by the planar teeth in the radial direction, making it impossible to achieve radially distributed multiple tooth rings. Consequently, it cannot simultaneously output multiple different signals. Furthermore, the Hall chip's detection distance is relatively short, and the planar teeth are densely packed with indistinct boundaries between tooth peaks and roots. Therefore, the distance between the Hall chip and the planar teeth must be strictly controlled within 0.2mm. Exceeding this distance will cause signal loss, significantly increasing the requirements for the fit between components and compromising the accuracy and effectiveness of the Hall effect speed sensor's speed measurement. This leads to poor intelligence and overall performance of the locomotive.

[0004] Therefore, there is an urgent need for a Hall effect speed sensor structure for locomotives that can be compatible with existing installation interfaces, reduce installation difficulty and technical requirements for on-site installation, avoid reducing the sampling accuracy of the sensor, realize multiple radially distributed toothed rings, thereby achieving simultaneous output of multiple different signals, and increase the detection distance of the sensor to 0.7mm, which greatly reduces the requirements for the fit between various parts and improves the intelligence level and overall performance of the locomotive. Utility Model Content

[0005] The purpose of this invention is to provide a Hall effect speed sensor structure for locomotives, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A Hall effect speed sensor structure for locomotives includes: Planar teeth and several Hall chip modules; The planar tooth includes a first gear ring and a second gear ring; Several Hall chip modules are uniformly arranged along the axial direction of the planar teeth. The distance between some of the Hall chip modules and the planar teeth is ≤0.7mm.

[0007] The locomotive Hall-effect speed sensor structure according to this utility model has at least the following technical advantages: The Hall effect speed sensor structure for this locomotive significantly reduces the radial space occupied by the planar teeth by replacing the original Hall chip module with one positioned along the axial direction of the planar teeth. This allows the Hall effect speed sensor to be connected to the original axle box structure without altering it. It is compatible with existing mounting interfaces, reducing installation difficulty and technical requirements for on-site installation, while also avoiding a decrease in sensor sampling accuracy. Furthermore, the Hall chip module's axial positioning allows for the radial distribution of multiple tooth rings, enabling simultaneous output of multiple different signals. Simultaneously, it increases the sensor's detection distance to 0.7mm, drastically reducing the requirements for fit between components. This meets the vehicle's diverse information needs, improving the locomotive's intelligence level and overall performance.

[0008] As a further improvement of this utility model, a cover plate is provided on one side of the planar tooth.

[0009] To ensure the required machining accuracy and cost-effectiveness, the planar teeth are etched. However, if the etching depth exceeds 0.5mm, an undercut taper is easily formed, which makes it impossible to guarantee the tooth dimensions. By setting a cover plate on one side of the planar teeth, the thickness of the planar teeth can be effectively increased, avoiding the undercut taper formed when the etching depth exceeds 0.5mm, thus ensuring the tooth dimensions. At the same time, the detection distance of the Hall chip can still reach 0.7mm, ensuring the normal detection performance of the sensor and guaranteeing machining accuracy.

[0010] As a further improvement of this utility model, the cover plate is made of aluminum alloy.

[0011] Because the cover plate is made of aluminum alloy, which has a relatively low density, it can effectively maintain the light weight of the entire sensor. This ensures that the weight of the Hall effect speed sensor meets the connection and usage requirements of the original photoelectric sensor mounting interface, greatly simplifying the installation process of the Hall effect speed sensor and reducing installation difficulty and cost. Furthermore, it can prevent the original photoelectric sensor mounting interface from becoming loose or damaged due to excessive sensor weight, ensuring the stability and reliability of the mounting interface.

[0012] As a further embodiment of this utility model: the first gear ring and the second gear ring are integrally formed concentric tooth structures, and the second gear ring is disposed on the outer circle of the first gear ring.

[0013] As a further improvement of this utility model, the concentricity deviation between the first gear ring and the second gear ring is ±0.05mm.

[0014] Because the first and second gear rings are integrally formed concentric tooth structures, with the second gear ring positioned on the outer circumference of the first gear ring, the integrally formed concentric tooth structure makes the connection between the first and second gear rings more robust, enhancing the stability of the entire planar tooth structure and preventing the possibility of loosening or displacement of the connection between the first and second gear rings. Furthermore, the concentricity deviation between the first and second gear rings is ±0.05mm, ensuring that the Hall chip module can accurately sense changes in the magnetic field of the gear rings, guaranteeing a more stable and accurate signal output by the sensor, and improving the accuracy and reliability of speed measurement.

[0015] As a further embodiment of this invention, the first gear ring has 62-82 teeth.

[0016] As a further embodiment of this invention, the second gear ring has 190-210 teeth.

[0017] Since the number of teeth on the first gear ring is 62-82, preferably 72, and the number of teeth on the second gear ring is 190-210, preferably 200, the sensor can provide multiple 72-pulse signal outputs and 200-pulse signal outputs. This can meet the different measurement accuracy requirements of different parts or functions of the equipment, realize the flexible configuration of a single sensor in multiple applications, and improve the integration and efficiency of the equipment.

[0018] As a further improvement of this utility model, the surface roughness of both the first gear ring and the second gear ring is Ra≤0.8μm.

[0019] Since the surface roughness of both the first and second gear rings is Ra≤0.8μm, the smaller the surface roughness, the smoother the gear ring surface, which effectively reduces friction, reduces the wear on the gear ring surface, and ensures that the gear ring can maintain good shape and dimensional accuracy after long-term use, thus extending the service life of the gear ring.

[0020] As a further embodiment of this utility model: the Hall chip module includes a magnet and a Hall element, the magnet is disposed on the top of the Hall element, and the bottom of the Hall element is close to the top of the planar tooth.

[0021] Since the Hall chip module includes a magnet and a Hall element, with the magnet positioned on top of the Hall element and the bottom of the Hall element close to the top of the planar teeth, the Hall chip module is positioned along the axial direction of the planar teeth. This effectively reduces the space occupied by the planar teeth in the radial direction, making it compatible with the original photoelectric sensor mounting interface and the mounting space at the mounting interface. Furthermore, it does not require changes to the original shaft box structure, reducing installation difficulty and technical requirements for on-site installation, improving installation efficiency, and saving overall installation costs.

[0022] As a further embodiment of this invention: the bottom of the magnet is bonded to the top of the Hall element with epoxy resin adhesive, and the bonding strength is 10Mpa-15Mpa.

[0023] Because the bottom of the magnet is bonded to the top of the Hall element with epoxy resin, the magnet and the Hall element can maintain a relatively fixed positional relationship, ensuring that the sensor can accurately sense changes in the magnetic field. The bonding strength is 10Mpa-15Mpa, ensuring the bonding stability of the magnet and the Hall element and preventing relative displacement or detachment when subjected to external forces such as vibration and impact. This avoids measurement errors or sensor failure caused by changes in the position of the magnet and the Hall element. Attached Figure Description

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 A schematic diagram of the motion state structure of a Hall effect speed sensor for locomotives; Figure 2 for Figure 1 Partial top view of the structure; Figure 3 The second schematic diagram shows the motion state structure of a Hall-type speed sensor for locomotives. Figure 4 for Figure 3 Partial top view of the structure; Figure 5 This is based on the existing Hall effect speed sensor structure.

[0026] Figure label: 1. Planar tooth; 101. First toothed ring; 102. Second toothed ring; 2. Hall chip module; 201. Magnet; 202. Hall element. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, 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 for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] like Figure 1-4The present invention provides a Hall effect speed sensor structure for locomotives, comprising: a planar tooth 1 and a plurality of Hall effect chip modules 2; the planar tooth 1 includes a first tooth ring 101 and a second tooth ring 102; the plurality of Hall effect chip modules 2 are uniformly arranged along the axial direction of the planar tooth 1; the distance between the plurality of Hall effect chip modules 2 and the planar tooth 1 is ≤0.7mm.

[0034] Specifically, the Hall effect speed sensor structure for this locomotive replaces the original Hall chip module 2, which was positioned radially along the planar teeth 1, with the Hall chip module 2 positioned axially along the planar teeth 1. This significantly reduces the radial space occupied by the planar teeth 1, allowing the Hall effect speed sensor to be connected to the original axle box structure without altering it. This ensures compatibility with existing mounting interfaces, reduces installation difficulty and technical requirements for on-site installation, and avoids compromising sensor sampling accuracy. Furthermore, the Hall chip module 3, positioned axially along the planar teeth 2, allows for the radial distribution of multiple tooth rings, enabling simultaneous output of multiple different signals. Simultaneously, this increases the sensor's detection distance to 0.7mm, significantly reducing the requirements for the fit between components, thus meeting the vehicle's diverse information needs and improving the locomotive's intelligence level and overall performance.

[0035] Furthermore, a cover plate is provided on one side of the flat tooth 1.

[0036] Specifically, in order to meet the processing accuracy requirements and achieve good economic efficiency, the planar tooth 2 adopts an etching process. However, if the etching depth exceeds 0.5mm, it is easy to form an undercut taper, which makes it impossible to guarantee the tooth shape dimensions. By setting a cover plate on one side of the planar tooth 1, the thickness of the planar tooth 1 can be effectively increased, avoiding the undercut taper formed by etching depth exceeding 0.5mm, ensuring the tooth shape dimensions, and the detection distance of the Hall chip can still reach 0.7mm, ensuring the normal detection performance of the sensor and guaranteeing processing accuracy.

[0037] Furthermore, the cover plate is made of aluminum alloy.

[0038] Specifically, since the cover plate is made of aluminum alloy, which has a relatively low density, it can effectively maintain the light weight of the entire sensor. This ensures that the weight of the Hall effect speed sensor meets the connection and usage requirements of the original photoelectric sensor mounting interface, greatly simplifying the installation process of the Hall effect speed sensor and reducing installation difficulty and cost. Furthermore, it can prevent the original photoelectric sensor mounting interface from becoming loose or damaged due to excessive sensor weight, ensuring the stability and reliability of the mounting interface.

[0039] like Figure 1 and Figure 3As shown, the first gear ring 101 and the second gear ring 102 are integrally formed concentric tooth structures, and the second gear ring 102 is located on the outer circle of the first gear ring 101; the concentricity deviation between the first gear ring 101 and the second gear ring 102 is ±0.05mm.

[0040] Specifically, since the first gear ring 101 and the second gear ring 102 are integrally formed concentric tooth structures, and the second gear ring 102 is located on the outer circle of the first gear ring 101, the integrally formed concentric tooth structure makes the connection between the first gear ring 101 and the second gear ring 102 more secure, enhances the stability of the entire planar tooth structure, and avoids the possibility of loosening or displacement of the connection between the first gear ring 101 and the second gear ring 102; and the concentricity deviation between the first gear ring 101 and the second gear ring 102 is ±0.05mm, which can ensure that the Hall chip module 2 can accurately sense the magnetic field change of the gear ring, ensure that the signal output by the sensor is more stable and accurate, and improve the accuracy and reliability of speed measurement.

[0041] According to an embodiment of the present invention, the first gear ring 101 has 62-82 teeth; the second gear ring 102 has 190-210 teeth.

[0042] Specifically, since the number of teeth on the first gear ring 101 is 62-82, preferably 72, and the number of teeth on the second gear ring 102 is 190-210, preferably 200, the sensor can provide multiple 72-pulse signal outputs and 200-pulse signal outputs. This can meet the different measurement accuracy requirements of different parts or functions of the equipment, realize the flexible configuration of a single sensor in multiple applications, and improve the integration and efficiency of the equipment.

[0043] Furthermore, the surface roughness of both the first gear ring 101 and the second gear ring 102 is Ra≤0.8μm.

[0044] Specifically, since the surface roughness of both the first gear ring 101 and the second gear ring 102 is Ra≤0.8μm, the smaller surface roughness means that the surface of the gear ring is smoother, which effectively reduces friction, reduces the wear of the gear ring surface, ensures that the gear ring can still maintain good shape and dimensional accuracy after long-term use, and extends the service life of the gear ring.

[0045] According to embodiments of the present invention, such as Figure 1-4 As shown, the Hall chip module 2 includes a magnet 201 and a Hall element 202. The magnet 201 is disposed on the top of the Hall element 202, and the bottom of the Hall element 202 is close to the top of the planar tooth 1.

[0046] Specifically, since the Hall chip module 2 includes a magnet 201 and a Hall element 202, with the magnet 201 positioned on top of the Hall element 202 and the bottom of the Hall element 202 close to the top of the planar tooth 1, the Hall chip module 2 is positioned along the axial direction of the planar tooth 1. This effectively reduces the space occupied by the planar tooth 1 in the radial direction, making it compatible with the original photoelectric sensor mounting interface and the mounting space at the mounting interface. Furthermore, it eliminates the need to change the original shaft box structure, reducing installation difficulty and technical requirements for on-site installation, improving installation efficiency, and saving overall installation costs.

[0047] Furthermore, the bottom of the magnet 201 is bonded to the top of the Hall element 202 with epoxy resin adhesive, and the bonding strength is 10Mpa-15Mpa.

[0048] Specifically, because the bottom of the magnet 201 is bonded to the top of the Hall element 202 with epoxy resin, the magnet 201 and the Hall element 202 can maintain a relatively fixed positional relationship, ensuring that the sensor can accurately sense changes in the magnetic field; and the bonding strength is 10Mpa-15Mpa, ensuring the bonding stability of the magnet 201 and the Hall element 202, preventing relative displacement or detachment when subjected to external forces such as vibration and impact, and avoiding measurement errors or sensor failure due to changes in the position of the magnet 201 and the Hall element 202.

[0049] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A Hall effect speed sensor structure for locomotives, characterized in that, include: Planar teeth (1) and several Hall chip modules (2); The planar tooth (1) includes a first gear ring (101) and a second gear ring (102); Several Hall chip modules (2) are uniformly arranged along the axial direction of the planar teeth (1); The distance between some of the Hall chip modules (2) and the planar teeth (1) is ≤0.7mm.

2. The Hall effect speed sensor structure for locomotives according to claim 1, characterized in that, A cover plate is provided on one side of the planar tooth (1).

3. The locomotive Hall effect speed sensor structure according to claim 2, characterized in that, The cover plate is made of aluminum alloy.

4. The Hall effect speed sensor structure for locomotives according to claim 3, characterized in that, The first toothed ring (101) and the second toothed ring (102) are integrally formed concentric tooth structures, and the second toothed ring (102) is disposed on the outer circle of the first toothed ring (101).

5. The locomotive Hall effect speed sensor structure according to claim 4, characterized in that, The concentricity deviation between the first gear ring (101) and the second gear ring (102) is ±0.05mm.

6. The Hall effect speed sensor structure for locomotives according to claim 5, characterized in that, The first gear ring (101) has 62-82 teeth.

7. The locomotive Hall effect speed sensor structure according to claim 6, characterized in that, The second gear ring (102) has 190-210 teeth.

8. The locomotive Hall effect speed sensor structure according to claim 7, characterized in that, The surface roughness of both the first gear ring (101) and the second gear ring (102) is Ra≤0.8μm.

9. The locomotive Hall effect speed sensor structure according to any one of claims 1 to 8, characterized in that, The Hall chip module (2) includes a magnet (201) and a Hall element (202). The magnet (201) is disposed on the top of the Hall element (202), and the bottom of the Hall element (202) is close to the top of the planar tooth (1).

10. The locomotive Hall effect speed sensor structure according to claim 9, characterized in that, The bottom of the magnet (201) is bonded to the top of the Hall element (202) with epoxy resin adhesive, and the bonding strength is 10Mpa-15Mpa.

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