A steering cylinder with built-in sensor

Abstract

The utility model discloses a steering oil cylinder with a built-in sensor, comprising an oil cylinder housing, the oil cylinder housing comprising a rod cavity and a rodless cavity, a piston assembly is arranged in the rod cavity, the piston assembly comprises a piston rod and a piston head, a piston center channel is arranged in the center of the piston rod, an annular induction magnetic ring is fixed in the piston center channel, an annular sensor body is arranged in the rodless cavity, a sensing rod body is arranged in the center of the sensor body, the sensing rod body is fixedly connected to the sensor body, and the sensing rod body passes through the induction magnetic ring. By installing a sensor inside the oil cylinder, the position of the oil cylinder piston can be accurately controlled, thereby realizing the intelligent control of the system and realizing the unmanned driving function of the road machinery.

Description

Technical Field

[0001] The utility model relates to a tool, more specifically, to a steering oil cylinder with a built-in sensor. Background Art

[0002] Existing commercial vehicles, engineering vehicles and other road machinery all use transmission steering cylinders, which are unable to detect and feedback or automatically control the extension length of the piston rod, that is, they are unable to accurately control the displacement of the piston rod of the hydraulic cylinder, and thus are unable to accurately control the motion trajectory of the steering system, making it difficult to achieve intelligent control of the steering system and unable to meet the requirements of unmanned driving systems. Utility Model Content

[0003] Based on this, it is necessary to provide a steering cylinder with a built-in sensor to address the above technical problems.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A steering cylinder with a built-in sensor, characterized in that the steering cylinder with a built-in sensor comprises a cylinder housing, wherein the cylinder housing comprises a rod chamber and a rodless chamber,

[0006] A piston assembly is arranged in the rod cavity, and the piston assembly includes a piston rod and a piston head. A piston center channel is arranged at the center of the piston rod, and an annular induction magnetic ring is fixed in the piston center channel.

[0007] An annular sensor body is arranged in the rodless cavity, a sensing rod body is arranged at the center of the sensor body, the sensing rod body is fixedly connected to the sensor body, and the sensing rod body passes through the induction magnetic ring.

[0008] As a preferred embodiment of the utility model, the oil cylinder housing is provided with a first oil port and a second oil port, the first oil port is connected to the rodless chamber, and the second oil port is connected to the rod chamber.

[0009] As a preferred embodiment of the utility model, a signal line connector is provided on the outer wall of the oil cylinder housing, and the signal line connector is connected to the sensor body through a signal transmission harness.

[0010] As a preferred embodiment of the utility model, the sensing rod body is a metal rod.

[0011] As a preferred embodiment of the utility model, an excitation pulse generating module and a detection module are provided in the sensor body.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a steering oil cylinder with a built-in sensor. By installing the sensor inside the oil cylinder, the position of the oil cylinder piston can be accurately controlled, thereby realizing intelligent control of the system and realizing the unmanned driving function of the road machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the structure of the steering cylinder with a built-in sensor of the utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the module structure of the sensor body of the steering cylinder with a built-in sensor;

[0017] The markings in the figure are as follows: 1. Cylinder housing; 11. Rod chamber; 12. Rodless chamber; 2. Signal line connector; 21. Signal transmission harness; 3. Sensor body; 300. Excitation pulse generating module; 301. Detection module; 31. Sensing rod body; 4. Induction magnetic ring; 5. Piston assembly; 51. Piston rod; 511. Piston center channel; 52. Piston head; A. First oil port; B. Second oil port. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] like Figure 1 As shown, the steering cylinder with built-in sensor includes a cylinder housing 1 , and the cylinder housing 1 includes a rod chamber 11 and a rodless chamber 12 .

[0020] A piston assembly 5 is disposed in the rod cavity 11 , and the piston assembly 5 includes a piston rod 51 and a piston head 52 . A piston center channel 511 is disposed at the center of the piston rod 51 , and an annular induction magnetic ring 4 is fixed in the piston center channel 511 .

[0021] An annular sensor body 3 is disposed in the rodless cavity 12 . A sensing rod 31 is disposed at the center of the sensor body 3 . The sensing rod 31 is fixedly connected to the sensor body 3 and passes through the induction magnetic ring 4 .

[0022] It should be noted that the sensing rod body 31 is a metal rod.

[0023] The oil cylinder housing 1 is provided with a first oil port A and a second oil port B. The first oil port A is communicated with the rodless chamber 12 , and the second oil port B is communicated with the rod chamber 11 .

[0024] A signal line connector 2 is disposed on the outer wall of the oil cylinder housing 1 , and the signal line connector 2 is connected to the sensor body 3 through a signal transmission harness 21 . The signal transmission harness 21 transmits the vehicle power supply signal to the sensor body 3 .

[0025] In addition, an excitation pulse generating module 300 and a detection module 301 are disposed in the sensor body 3 .

[0026] The working mode of the steering cylinder with built-in sensor is described below.

[0027] First, the excitation pulse generating module 300 of the sensor body 3 sends a current excitation pulse to the sensor rod body 31, which forms an annular magnetic field around the sensor rod body 31. When the annular magnetic field meets the magnetic field generated by the induction magnetic ring 4, a torsional stress wave pulse signal is generated in the sensor rod body 31 due to the effect of magnetostriction.

[0028] When the hydraulic oil enters the rodless chamber 12 through the first oil port A, a certain thrust is generated, so the piston assembly 5 moves to the right, and the induction magnetic ring 4 moves to the right synchronously.

[0029] As the position of the induction magnetic ring 4 continues to change, the magnetic field and annular magnetic field it generates generate torsional stress waves at various positions. These torsional stress waves are transmitted from the position of the induction magnetic ring 4 along the sensing rod 31 back to the sensor body 3 at a fixed speed and are recorded by the detection module 301.

[0030] By recording the time difference between the excitation pulse generation module 300 sending the excitation pulse and the detection module 301 receiving the signal, and combining the propagation speed of the torsional stress wave in the sensing rod body 31, the distance between the induction magnetic ring 4 and the reference point and the moving speed of the induction magnetic ring 4 can be determined, thereby confirming the position and speed of the extended piston rod 51. At the same time, the signal transmission harness 2 feeds these signals back to the vehicle unmanned driving system, and through a series of algorithms in the system, the unmanned driving system can achieve precise control of the steering cylinder.

[0031] By installing sensors inside the cylinder, the position of the cylinder piston can be accurately controlled, thereby realizing intelligent control of the system and realizing the unmanned driving function of the road machinery.

[0032] Without limitation to this, any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope defined in the claims.

Claims

1. A steering cylinder with a built-in sensor, characterized in that: The steering cylinder with a built-in sensor comprises a cylinder housing (1), wherein the cylinder housing (1) comprises a rod chamber (11) and a rodless chamber (12). A piston assembly (5) is disposed in the rod chamber (11), the piston assembly (5) comprising a piston rod (51) and a piston head (52), a piston center channel (511) penetrating the center of the piston rod (51), an annular induction magnetic ring (4) is fixed in the piston center channel (511), An annular sensor body (3) is provided in the rodless cavity (12), a sensing rod body (31) is provided at the center of the sensor body (3), the sensing rod body (31) is fixedly connected to the sensor body (3), and the sensing rod body (31) passes through the induction magnetic ring (4).

2. The steering cylinder with built-in sensor according to claim 1, characterized in that: The oil cylinder housing (1) is provided with a first oil port (A) and a second oil port (B), the first oil port (A) is connected to the rodless chamber (12), and the second oil port (B) is connected to the rod chamber (11).

3. The steering cylinder with built-in sensor according to claim 1, characterized in that: A signal line connector (2) is provided on the outer wall of the oil cylinder housing (1), and the signal line connector (2) is connected to the sensor body (3) via a signal transmission harness (21).

4. The steering cylinder with built-in sensor according to claim 1, characterized in that: The sensing rod body (31) is a metal rod.

5. The steering cylinder with built-in sensor according to claim 1, characterized in that: The sensor body (3) is provided with an excitation pulse generating module (300) and a detection module (301).

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