Chassis position sensor and shock absorber

Abstract

The utility model discloses a chassis position sensor and a shock absorber. The chassis position sensor comprises a shell, a signal processing module and a differential transformation detection module which are located in the shell, and a magnetic piece which is located outside the shell and corresponds to the differential transformation detection module. Wherein the differential voltage transformation detection module is in communication connection with the signal processing module, and the magnetic part is in linkage with a shock absorber of a chassis and moves in the lengthwise direction of the differential voltage transformation detection module. According to the chassis position sensor and the shock absorber provided by the utility model, the chassis position sensor with a novel structure is designed, the direct linear measurement of the chassis position change is realized by using the differential transformation principle, the data processing is simplified, and the measurement accuracy of the chassis displacement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a chassis position sensor and a shock absorber. Background Art

[0002] The chassis position sensor is an important sensing device in the vehicle suspension system. For example, in the vehicle suspension system, the chassis position sensor is needed to determine the changes in the vehicle body height (chassis position) and the road conditions, so as to adjust the position height of the vehicle chassis in time, thereby providing the driver with a safe and comfortable driving experience.

[0003] Existing chassis position sensors usually use Hall angle chassis position sensors. This type of chassis position sensor cannot directly measure linear displacement and needs to convert the measured angle change into linear displacement change. This makes it easy for errors to occur in the measurement conversion process, affecting the measurement accuracy. Utility Model Content

[0004] The utility model aims to provide a chassis position sensor and a shock absorber, which can directly measure the chassis linear displacement change and solve the problem of chassis displacement measurement accuracy.

[0005] According to a first aspect of an embodiment of the utility model, a chassis position sensor is provided, comprising a shell, a signal processing module and a differential voltage transformer detection module located inside the shell, and a magnetic component located outside the shell and corresponding to the differential voltage transformer detection module; wherein the differential voltage transformer detection module is communicatively connected with the signal processing module, and the magnetic component is arranged in linkage with the shock absorber of the chassis and moves along the longitudinal direction of the differential voltage transformer detection module.

[0006] A further improvement of the chassis position sensor of the utility model is that the differential voltage transformer detection module comprises a soft magnetic core, a primary coil sleeved on the soft magnetic core, and secondary coils respectively located at two ends of the primary coil;

[0007] The primary coil and the secondary coil are respectively connected to a signal processing module, and the signal processing module is configured to obtain a change in electromotive force through the movement of the magnetic member, and obtain a displacement change of the chassis according to the change in the electromotive force.

[0008] A further improvement of the chassis position sensor of the utility model is that the chassis position sensor also includes brackets respectively arranged at both ends of the shell and a slide rail connected between the brackets, and the magnetic member is assembled on the slide rail and can slide along the slide rail.

[0009] A further improvement of the chassis position sensor of the utility model is that the chassis position sensor further comprises a sliding block slidably arranged along the sliding rail, and the magnetic member is located inside the sliding block and at one end of the sliding block close to the housing.

[0010] A further improvement of the chassis position sensor of the utility model is that a connecting portion for connecting with the shock absorber is provided on the slider, and the connecting portion is arranged on the side surface of the slider and / or away from the top surface of the magnetic member.

[0011] A further improvement of the chassis position sensor of the utility model lies in that the connecting portion is a ball head arranged on the sliding block, and the ball head is arranged on the top surface of the sliding block away from the magnetic member.

[0012] A further improvement of the chassis position sensor of the utility model is that the chassis position sensor further comprises elastic sheaths respectively located between the sliding block and the brackets at both ends, and the elastic sheaths are sleeved on the sliding rails.

[0013] A further improvement of the chassis position sensor of the utility model is that the housing is a long strip-shaped housing, and the axial direction of the slide rail is consistent with the length direction of the housing.

[0014] A further improvement of the chassis position sensor of the utility model is that the housing is further provided with a connector for connecting to the outside, and the connecting terminal of the connector is connected to the signal processing module.

[0015] According to a second aspect of an embodiment of the utility model, a shock absorber is provided, comprising a shock absorber body, a shock absorber arm, a connecting rod and a chassis position sensor as described in any one of the above; wherein the shock absorber arm can telescopically move relative to the shock absorber body, the chassis position sensor is fixed on the shock absorber body, one end of the connecting rod is connected to the chassis position sensor, and the other end of the connecting rod is connected to the shock absorber arm.

[0016] According to the chassis position sensor and shock absorber provided by the utility model, a chassis position sensor with a novel structure is designed, which realizes direct linear measurement of chassis position change by utilizing the differential transformer principle, simplifies data processing, and improves the measurement accuracy of chassis displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is described in detail below through exemplary embodiments with reference to the accompanying drawings, wherein:

[0018] Figure 1 A schematic diagram showing the structure of a chassis position sensor provided by an embodiment of the utility model being assembled on a chassis;

[0019] Figure 2A schematic diagram showing the structure of a chassis position sensor provided by an embodiment of the utility model is shown;

[0020] Figure 3 An exploded view of a chassis position sensor provided by an embodiment of the utility model is shown;

[0021] Figure 4 A cross-sectional view of a differential voltage transformer detection module in a chassis position sensor provided in an embodiment of the utility model is shown.

[0022] The accompanying drawings are only schematic and not necessarily drawn to scale, and they only show those parts necessary to illustrate the utility model, while other parts may be omitted or only briefly mentioned. That is, in addition to the parts shown in the accompanying drawings, the utility model may also include other parts. DETAILED DESCRIPTION

[0023] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0024] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0025] In the description of this embodiment, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. These are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0026] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0027] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0028] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Figure 1 A schematic diagram showing the structure of a chassis position sensor provided by an embodiment of the utility model being assembled on a chassis; Figure 2 A schematic diagram showing the structure of a chassis position sensor provided by an embodiment of the utility model is shown; Figure 3 An exploded view of a chassis position sensor provided by an embodiment of the utility model is shown; Figure 4 A cross-sectional view of a differential voltage transformer detection module in a chassis position sensor provided in an embodiment of the utility model is shown.

[0030] Reference Figures 1 to 4 The chassis position sensor 10 of the embodiment of the utility model is installed on the shock absorber 20 of the chassis. The shock absorber 20 includes a shock absorbing body 21, a shock absorbing arm 22, a connecting rod 23 and the chassis position sensor 10.

[0031] The shock absorbing arm 22 can telescopically move relative to the shock absorbing body 21, the chassis position sensor 10 is fixed on the shock absorbing body 21, one end of the connecting rod 23 is connected to the chassis position sensor 10, and the other end of the connecting rod 23 is connected to the shock absorbing arm 22. The chassis position sensor 10 obtains the displacement change of the chassis by detecting the movement of the shock absorbing arm 22 in the movement direction. In one embodiment, the connecting rod 23 and the chassis position sensor 10 are connected by a ball groove and a ball head, which is conducive to movement control.

[0032] The chassis position sensor 10 includes a housing 11, a signal processing module 12 and a differential voltage transformer detection module 13 located inside the housing 11, and a magnetic member (not shown) located outside the housing 11 and corresponding to the differential voltage transformer detection module 13. The differential voltage transformer detection module 13 is communicatively connected to the signal processing module 12, and the magnetic member is arranged in linkage with the shock absorber 20 of the chassis and moves along the longitudinal direction of the differential voltage transformer detection module 13, and the longitudinal direction of the differential voltage transformer detection module 13 is consistent with the movement direction of the shock absorber 20. Specifically, the magnetic member can move with the movement of the shock absorber arm 22, and the movement of the magnetic member will cause the change of the electromotive force of the differential voltage transformer detection module 13, and the signal processing module 12 can calculate the displacement change of the chassis according to the change of the detected electromotive force.

[0033] In an embodiment of the utility model, the differential voltage transformer detection module 13 includes a soft magnetic core (not shown), a primary coil 132 sleeved on the soft magnetic core, and a secondary coil 133 respectively located at both ends of the primary coil 132. The primary coil 132 and the secondary coil 133 are respectively connected to the signal processing module 12, and the signal processing module 12 is configured to obtain the change of electromotive force through the movement of the magnetic part, and obtain the displacement change of the chassis according to the change of electromotive force. The signal processing module 12 includes a PCB 121 and electronic components such as a processor installed on the PCB 121.

[0034] In this embodiment, the soft magnetic core, the primary coil 132 and the secondary coil 133 form an electromagnetic field in the above matching manner. The magnetic member is a permanent magnet. When the magnetic member moves between the two coils, the induced electromotive force of the two coils changes under the influence of the magnetic member. When the magnetic member approaches one of the secondary coils 133, the amplitude of the induced electromotive force of the secondary coil 133 decreases, while the amplitude of the induced electromotive force of the secondary coil 133 at the other end increases.

[0035] Furthermore, the chassis position sensor 10 further includes brackets 111 respectively arranged at both ends of the housing 11 and a slide rail 112 connected between the brackets 111, and the magnetic member is mounted on the slide rail 112 and can slide along the slide rail 112. In this embodiment, the housing 11 is a long strip-shaped housing 11, and the axial direction of the slide rail 112 is consistent with the length direction of the housing 11, and the length direction of the housing 11 is consistent with the movement direction of the shock absorber arm 22, so that the axial direction of the slide rail 112 is consistent with the movement direction of the shock absorber arm 22. The housing 11 includes an upper cover 101 and a bottom plate 102 mounted on the upper cover 101, and a PCB 121 is fixed on the bottom plate 102.

[0036] The chassis position sensor 10 also includes a slider 113 that is slidably arranged along the slide rail 112, and the magnetic member is located inside the slider 113 and at one end of the slider 113 that is close to the housing 11. The slider 113 can slide in cooperation with the slide rail 112 by means of insertion, clamping, etc. In this embodiment, the slide rail 112 is cylindrical, and the slider 113 is provided with a through hole that is adapted to the slide rail 112 so that the slider 113 can be inserted into the slide rail 112. The chassis position sensor 10 also includes an elastic sheath 114 that is respectively located between the slider 113 and the two end brackets 111, and the elastic sheath 114 is sleeved on the slide rail 112. The elastic sheath 114 can not only protect the slide rail 112, but also facilitate the resetting of the slider 113. In this embodiment, the elastic sheath 114 is configured as a bellows structure.

[0037] The slider 113 is provided with a connecting portion 1131 for connecting with the shock absorber 20, and the connecting portion 1131 is arranged on the side of the slider 113 and / or the top surface away from the magnetic member. In one embodiment, the connecting portion 1131 is a ball head arranged on the slider 113, and the ball head is arranged on the top surface of the slider 113 away from the magnetic member to cooperate with the connecting rod 23.

[0038] Furthermore, the housing 11 is also provided with a connector 115 for connecting to the outside, and the connection terminal of the connector 115 is connected to the signal processing module 12, so that the detected signal can be sent to other control modules. In addition, at least one mounting portion 116 is also provided on the housing 11, and the chassis position sensor 10 is mounted on the shock absorber 20 through the mounting member and the mounting portion 116.

[0039] The chassis position sensor and shock absorber provided by the utility model design a chassis position sensor with a new structure, which realizes direct linear measurement of chassis position change by utilizing the differential voltage transformer principle, simplifies data processing, and improves the measurement accuracy of chassis displacement.

[0040] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A chassis position sensor, characterized in that: It includes a shell, a signal processing module and a differential voltage transformer detection module located in the shell, and a magnetic component located outside the shell and corresponding to the differential voltage transformer detection module; wherein the differential voltage transformer detection module is communicatively connected with the signal processing module, and the magnetic component is linked to the shock absorber of the chassis and moves along the longitudinal direction of the differential voltage transformer detection module.

2. The chassis position sensor according to claim 1, characterized in that: The differential voltage transformation detection module includes a soft magnetic core, a primary coil sleeved on the soft magnetic core, and secondary coils respectively located at two ends of the primary coil; The primary coil and the secondary coil are respectively connected to a signal processing module, and the signal processing module is configured to obtain a change in electromotive force through the movement of the magnetic member, and obtain a displacement change of the chassis according to the change in the electromotive force.

3. The chassis position sensor according to claim 1, characterized in that: The chassis position sensor also includes brackets respectively arranged at two ends of the shell and a slide rail connected between the brackets. The magnetic member is assembled on the slide rail and can slide along the slide rail.

4. The chassis position sensor according to claim 3, characterized in that: The chassis position sensor further comprises a sliding block slidably arranged along the sliding rail, and the magnetic member is located in the sliding block and at one end of the sliding block close to the housing.

5. The chassis position sensor according to claim 4, characterized in that: The sliding block is provided with a connecting portion for connecting with the shock absorber, and the connecting portion is arranged on the side surface of the sliding block and / or the top surface away from the magnetic member.

6. The chassis position sensor according to claim 5, characterized in that: The connecting portion is a ball head arranged on the sliding block, and the ball head is arranged on the top surface of the sliding block away from the magnetic component.

7. The chassis position sensor according to claim 4, characterized in that: The chassis position sensor also includes elastic sheaths respectively located between the slider and the brackets at both ends, and the elastic sheaths are sleeved on the slide rail.

8. The chassis position sensor according to claim 3, characterized in that: The housing is a long strip-shaped housing, and the axial direction of the slide rail is consistent with the length direction of the housing.

9. The chassis position sensor according to claim 1, characterized in that: The housing is further provided with a connector for connecting to the outside, and a connection terminal of the connector is connected to the signal processing module.

10. A shock absorber, characterized in that: It comprises a shock absorbing body, a shock absorbing arm, a connecting rod and a chassis position sensor as described in any one of claims 1 to 9; wherein the shock absorbing arm can telescope relative to the shock absorbing body, the chassis position sensor is fixed on the shock absorbing body, one end of the connecting rod is connected to the chassis position sensor, and the other end of the connecting rod is connected to the shock absorbing arm.

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