A speed signal acquisition device based on a differential housing

Abstract

The utility model discloses a speed signal acquisition device based on differential mechanism shell, including speed sensor, axle housing and differential mechanism shell, the speed sensor is installed on axle housing, and is opposite to the differential mechanism shell arrangement, and the speed sensor is used for detecting the change in the rotation process of differential mechanism shell to gather speed signal. The utility model discloses the speed sensor arrangement position is reasonable and is convenient for overhauling, and maintenance personnel can check, maintain or replace sensor quickly, conveniently, reduce the maintenance time and work load, improve the maintenance efficiency, ensure the normal operation and use efficiency of vehicle, reduce the maintenance cost and vehicle downtime loss.

Description

Technical Field

[0001] This utility model relates to the field of sensor setting technology, and in particular to a speed signal acquisition device based on a differential housing. Background Technology

[0002] In the field of new energy commercial vehicles, the drive axle, as a core component, has a crucial impact on vehicle performance and market competitiveness. Speed ​​signal acquisition, as a vital part of vehicle monitoring and management, directly relates to the realization of functions such as speed and mileage monitoring. Traditional speed signal acquisition methods typically require customized development of acceleration sensor layouts to meet specific regulatory requirements, such as EU speed and mileage monitoring regulations. However, this approach suffers from long development cycles, requiring extensive research and development work to address different regulations; and high material costs, with additional components such as gear rings used for signal acquisition increasing production costs.

[0003] Therefore, developing a speed signal acquisition device that requires no additional components, is highly compatible, low-cost, easy to maintain, and has good protection performance is of great significance for improving the performance and market competitiveness of drive axles in new energy commercial vehicles.

[0004] To address the problems in related technologies, this utility model provides a speed signal acquisition device based on a differential housing. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a speed signal acquisition device based on a differential housing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A speed signal acquisition device based on a differential housing includes a speed sensor, an axle housing, and a differential housing. The speed sensor is mounted on the axle housing and is disposed opposite to the differential housing. The speed sensor is used to detect changes in the differential housing during rotation to acquire speed signals.

[0008] Furthermore, the speed sensor is a Hall effect sensor.

[0009] Furthermore, the speed sensor is mounted on the rear cover of the axle housing via a threaded connection.

[0010] Furthermore, the differential housing surface has an uneven structure.

[0011] Furthermore, the speed sensor is also connected to the dashcam's instrument panel via a hardwire.

[0012] Furthermore, the differential housing is installed inside the axle housing.

[0013] Compared to existing technologies, this invention fully utilizes the structural features of existing differential housings and axle housings, achieving speed signal acquisition without the need for additional components such as gear rings. Compared to existing structures with similar functions, it can save 50-80 yuan per axle, significantly reducing material and R&D costs, enhancing the product's price competitiveness in the market, contributing to the export and promotion of new energy commercial vehicles, and creating higher economic benefits. Furthermore, the speed sensor's placement is reasonable and easy to maintain, allowing maintenance personnel to quickly and conveniently inspect, maintain, or replace the sensor, reducing maintenance time and workload, improving maintenance efficiency, ensuring normal vehicle operation and utilization efficiency, and reducing maintenance costs and vehicle downtime losses. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a speed signal acquisition device based on a differential housing provided in an embodiment;

[0015] Figure 2 This is a schematic diagram of the differential housing provided in the embodiment;

[0016] Figure 3 This is a schematic diagram of the speed sensor provided in the embodiment being disposed in the middle area of ​​the axle body;

[0017] Among them, 1. speed sensor; 2. axle housing; 3. differential housing; 4. brake chamber; 5. axle housing rear cover. Detailed Implementation

[0018] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0019] The purpose of this invention is to address the shortcomings of existing technologies by providing a speed signal acquisition device based on a differential housing.

[0020] Example

[0021] This embodiment provides a speed signal acquisition device based on a differential housing, such as... Figure 1-3 As shown, the vehicle includes a speed sensor 1, an axle housing 2, and a differential housing 3. The speed sensor 1 is mounted on the axle housing 2 and is positioned opposite the differential housing 3. The speed sensor 1 is used to detect changes in the differential housing 3 during rotation to acquire speed signals.

[0022] The axle housing 2 is typically a rigid hollow beam structure, supported at both ends by the left and right drive wheels. Its hollow interior houses the differential housing 3, half-shafts, and other transmission components. The axle housing 2 is mounted on the vehicle chassis and connected to the frame via bolts or other fasteners. Its two ends are connected to the wheels, providing crucial support and connection for the chassis.

[0023] It should be noted that the specific structure and installation position of the axle housing 2 can be referenced from existing axle housings, and will not be elaborated further in this embodiment.

[0024] The differential housing 3 is typically a circumferential component containing planetary gears, half-shaft gears, and other parts. Its outer surface has a textured surface with evenly distributed teeth or grooves, serving as a sensor for speed signals. The differential housing 3 is installed inside the axle housing 2, located in the center of the axle housing, and is connected to the axle housing 2 via bearings and other components, achieving a rotational connection. The axle housing 2 provides the mounting space and support for the differential housing 3. The rotation of the differential housing 3 drives the wheels, enabling the vehicle to move.

[0025] It should be noted that the specific structure and installation position of the differential housing 3 can be referenced from existing axle housings, and will not be elaborated further in this embodiment.

[0026] Speed ​​sensor 1 is a standard Hall effect sensor, containing components such as a Hall element, coil, and permanent magnet. The Hall element is the core component, used to sense changes in the magnetic field. The coil generates an induced electromotive force, and the permanent magnet provides the magnetic field. Taking a Hall effect speed sensor as an example, it has a cylindrical coil fixed to the inner wall of the housing, with a permanent magnet in the middle of the coil supported by a spring. The housing is made of metal or plastic, serving to protect the internal components and shield against external interference.

[0027] Speed ​​sensor 1 is mounted on axle housing 2 via a threaded connection, specifically in the middle area of ​​the axle body, surrounded by structures such as brake chamber 4 and the protruding feature surface of axle housing rear cover 5. During installation, threaded holes are pre-machined on the axle housing rear cover 5, and then speed sensor 1 is screwed into these holes. The sensor's probe is aligned with the concave and convex structures of the differential housing 3, maintaining a certain distance, typically around 2mm. This allows the differential housing 3 to detect changes in the surrounding magnetic field distribution as it rotates, converting these changes into pulse signals for accurate speed signal acquisition. By optimizing the installation position and detection method of speed sensor 1, an integrated arrangement is achieved within the existing space of axle housing 2 and differential housing 3. This results in a compact and integrated structure, improving the overall space utilization and structural rationality of the drive axle. It also provides more space for the installation and arrangement of other components, facilitating lightweight and miniaturized design of the drive axle and enhancing the product's adaptability and competitiveness in the new energy commercial vehicle drive axle market.

[0028] In this embodiment, the axle housing 2 provides a mounting base and protection for the speed sensor 1, preventing it from directly contacting external components. This effectively prevents the speed sensor 1 from being damaged by impacts during vehicle operation, improving the sensor's service life and reliability. The installation position of the speed sensor 1 allows it to easily detect rotational changes in the differential housing 3, while also facilitating inspection and maintenance. Furthermore, when installing the speed sensor 1, it is ensured that it is securely installed to prevent it from becoming loose due to vibrations or other reasons during vehicle operation.

[0029] The output of speed sensor 1 is also connected to the instrument panel of the dash cam via a hard-wired signal, converting the detected speed change into a pulse signal and transmitting it to the instrument panel of the dash cam to monitor vehicle speed and mileage.

[0030] When the differential housing 3 rotates, the uneven structure on its surface alters the distribution of the surrounding magnetic field. The Hall element in the probe of speed sensor 1 senses this change in the magnetic field and generates a corresponding electromotive force, which in turn produces a pulse signal. The frequency of this pulse signal is proportional to the rotational speed of the differential housing 3. This embodiment utilizes the changes in the uneven structure of the differential housing 3 as the detection target for the speed signal. The probe of speed sensor 1 can accurately identify and detect the changes in the differential housing during rotation, obtaining stable and accurate speed change pulse signals. This ensures the accuracy and reliability of speed and mileage monitoring, providing strong support for the driving safety and vehicle management of new energy commercial vehicles.

[0031] In this embodiment, the axle housing 1, as an important component of the vehicle chassis, transmits the engine's power to the wheels and bears the vehicle's weight and various loads during driving. Components such as the differential housing 3 inside the axle housing distribute and transmit power during vehicle operation, while the speed sensor 1 is mounted on the axle housing 1 to detect the vehicle's speed.

[0032] The speed signal acquisition device based on the differential housing in this embodiment is used as follows:

[0033] First, prepare the core components such as the speed sensor (a Hall effect sensor), threaded connectors, axle housing, and differential housing. A Hall effect sensor is a sensor that works based on the Hall effect principle, converting changes in magnetic fields into electrical signals, making it suitable for speed signal acquisition. In this embodiment, the Hall effect sensor used is model VDO 2185, which features high precision, high sensitivity, high reliability, and low power consumption. It can accurately detect changes in the magnetic field during the rotation of the differential housing, thereby achieving speed signal acquisition.

[0034] Screw the threaded connector into the pre-machined threaded hole in the rear cover of the axle housing. Ensure the threaded connector is securely and reliably installed to provide a stable mounting base for the speed sensor. In this embodiment, the threaded hole in the rear cover of the axle housing can use an M10×1.25 thread specification, and the threaded connector is 20mm long, which meets the installation requirements of the speed sensor.

[0035] The speed sensor is mounted on the rear cover of the axle housing via a threaded connection. During installation, ensure that the speed sensor probe aligns with the concave and convex structures of the differential housing to achieve accurate speed signal acquisition. The distance between the speed sensor probe and the differential housing should be maintained within 2mm to ensure that the sensor can accurately detect changes in the magnetic field of the differential housing.

[0036] Connect the output of the speed sensor to the input of the dashcam's instrument panel using a hard wire signal connection. During the connection process, ensure that the cable connection is secure and reliable, avoiding problems such as loose connections or short circuits.

[0037] With the vehicle stationary, activate the dashcam and observe whether the speed signal collected by the speed sensor is normal. Optimize the speed signal by adjusting the distance between the speed sensor probe and the differential housing, as well as the speed sensor's mounting angle.

[0038] When the vehicle is in motion, the differential housing rotates, and the uneven surface of its surface alters the distribution of the surrounding magnetic field. The speed sensor probe can detect these magnetic field changes in real time and convert them into pulse signals. The generated pulse signals are transmitted to the dashcam's instrument panel via hardwired signals. The dashcam's instrument panel uses these pulse signals to obtain the vehicle's speed and mileage information and displays it on the instrument screen for the driver to view in real time.

[0039] This embodiment of a speed signal acquisition device based on a differential housing can effectively acquire and monitor speed signals, meeting the regulatory requirements of new energy commercial vehicles in different countries and regions, and enhancing the vehicle's competitiveness and market adaptability. Simultaneously, this device offers advantages such as low cost, convenient maintenance, good protection performance, compact and integrated structure, strong compatibility, accurate and stable signal acquisition, strong scalability, improved product reliability, ease of manufacturing, and enhanced product competitiveness.

[0040] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A speed signal acquisition device based on a differential housing, characterized in that, It includes a speed sensor, an axle housing, and a differential housing. The speed sensor is mounted on the axle housing and is positioned opposite to the differential housing. The speed sensor is used to detect changes in the differential housing during rotation to collect speed signals.

2. The speed signal acquisition device based on a differential housing according to claim 1, characterized in that, The speed sensor is a Hall effect sensor.

3. The speed signal acquisition device based on a differential housing according to claim 1, characterized in that, The speed sensor is mounted on the rear cover of the axle housing via a threaded connection.

4. The speed signal acquisition device based on a differential housing according to claim 1, characterized in that, The differential housing surface has an uneven structure.

5. A speed signal acquisition device based on a differential housing according to claim 1, characterized in that, The speed sensor is also connected to the dashcam instrument panel via a hard wire.

6. A speed signal acquisition device based on a differential housing according to claim 1, characterized in that, The differential housing is installed inside the axle housing.

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