Speed regulation sensor of electric vehicle

Abstract

The utility model relates to the technical field of speed regulation sensors, in particular to a speed regulation sensor of an electric vehicle, which comprises a plastic shell, a plastic body, a shaft core rotatably arranged in the plastic shell, a torsion spring movably sleeved on the periphery of the shaft core and an electric brush assembly arranged at one end of the shaft core. The plastic body is arranged at one end of the plastic shell, a resistor disc assembly is arranged on the side, close to the electric brush assembly, of the plastic body and comprises two symmetrically-arranged resistor disc bodies, the electric brush assembly comprises two symmetrically-arranged electric brush bodies, and the electric brush bodies and the resistor disc bodies are matched in a one-to-one correspondence mode and abut against each other in a sliding mode. And each resistor disc body is connected with a terminal assembly. The device is novel in structure and ingenious in design, working reliability and stability of the device are guaranteed, the service life is prolonged, and replacement and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of speed regulating sensors, in particular to an electric vehicle speed regulating sensor. Background Art

[0002] A sensor that converts non-electrical physical quantities such as displacement, force, pressure, acceleration, torque, etc. into changes in resistance value. It mainly includes resistive strain sensors, potentiometer sensors (see displacement sensors) and manganese copper piezoresistive sensors. The force, pressure, weighing, displacement, acceleration, torque and other measuring instruments composed of resistive sensors and corresponding measuring circuits are one of the indispensable tools for automatic weighing, process detection and production process automation in metallurgy, electricity, transportation, petrochemical, commerce, biomedicine and defense departments. In the electric vehicle speed regulators currently on the market, resistive sensors are used for speed regulation. Most of the current resistive sensors have only a single resistor and a single brush. When the product is used, the speed regulation is achieved by adjusting the resistance as the brush moves on the resistor. However, since there is only a single resistor and a single brush, if the resistor or brush is damaged, the product needs to be replaced or repaired, which has a short service life, affects the reliability and stability of the work, and has high maintenance and replacement costs. Summary of the invention

[0003] The utility model provides an electric vehicle speed regulation sensor in view of the problems of the prior art, which has a novel structure and an ingenious design. When the sensor is working, an external driving shaft drives the shaft core to rotate, and when the shaft core rotates, the torsion spring is deformed. At the same time, the rotation of the shaft core drives the brush body to rotate synchronously, so that the brush body slides on the resistor body, and then the resistance is adjusted by the movement of the brush body on the resistor, thereby realizing speed regulation. The resistor assembly includes two symmetrically arranged resistor bodies, and the brush assembly includes two symmetrically arranged brush bodies. The brush body and the resistor body are matched and slidably abutted one by one, and have two loop structures. Even if one of the resistor bodies is damaged, the other resistor body can still work, thereby ensuring its working reliability and stability, which is conducive to improving service life and reducing replacement and maintenance costs.

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

[0005] The utility model provides an electric vehicle speed regulating sensor, which comprises a plastic shell, a plastic body, an axis core rotatably arranged in the plastic shell, a torsion spring movably sleeved on the outer periphery of the axis core, and a brush assembly installed at one end of the axis core, wherein the two ends of the torsion spring are respectively connected to the plastic shell, the plastic body is installed at one end of the plastic shell, a resistor assembly is arranged on one side of the plastic body close to the brush assembly, the resistor assembly comprises two symmetrically arranged resistor bodies, the brush assembly comprises two symmetrically arranged brush bodies, the brush bodies correspond to and slide against the resistor bodies in a one-to-one manner, and each resistor body is connected to a terminal assembly.

[0006] Wherein, a connector protection shell is also installed at the front end of the plastic body, the terminal assembly is located in the connector protection shell, an access opening is opened at the front end of the connector protection shell, and the terminal assembly is exposed in the access opening.

[0007] The plastic body is provided with a positioning plate, the positioning plate is provided with a positioning boss, the resistor assembly also includes a substrate, the substrate is provided with a positioning hole, the positioning boss is passed through the positioning hole, the substrate is fixed on a side of the plastic body close to the brush assembly, and the resistor body is fixed on a side of the substrate close to the brush assembly.

[0008] Wherein, a rotation hole is arranged in the middle of one end of the shaft core, and the front end of the positioning boss protrudes into the rotation hole.

[0009] Wherein, the plastic shell is further provided with an axial hole, the other end of the shaft core is provided with a connecting hole, and the axial hole and the connecting hole are arranged correspondingly.

[0010] Wherein, the outer wall of the shaft hole is sleeved with a first waterproof ring.

[0011] Wherein, a second waterproof ring is provided on the outer periphery of the shaft core.

[0012] Wherein, the resistor body is arranged in an arc shape.

[0013] Beneficial effects of the utility model:

[0014] The utility model has a novel structure and an ingenious design. When the utility model is working, the shaft core is driven to rotate by an external driving shaft. When the shaft core rotates, the torsion spring is deformed. At the same time, the rotation of the shaft core drives the brush body to rotate synchronously, so that the brush body slides on the resistor body, and then the resistance is adjusted by moving the brush body on the resistor, thereby realizing speed regulation. The resistor assembly includes two symmetrically arranged resistor bodies, and the brush assembly includes two symmetrically arranged brush bodies. The brush body and the resistor body are matched and slidably abutted one by one, and have two loop structures. Even if one of the resistor bodies is damaged, the other resistor body can still work, thereby ensuring its working reliability and stability, which is beneficial to improving service life and reducing replacement and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of an electric vehicle speed regulating sensor.

[0016] Figure 2 The utility model is a structural exploded view of an electric vehicle speed regulating sensor.

[0017] Figure 3 It is a schematic diagram of the structure of the terminal assembly, the resistor assembly and the positioning plate of the utility model.

[0018] Figure 4 It is a schematic structural diagram of the matching shaft core and brush assembly of the utility model.

[0019] exist Figures 1 to 4 Reference numerals in the drawings include:

[0020] 1. Plastic shell; 2. Plastic body; 3. Shaft core; 4. Torsion spring; 5. Brush assembly; 6. Resistor assembly; 7. Resistor body; 8. Brush body; 9. Connector protective shell; 10. Access opening; 11. Positioning plate; 12. Positioning boss; 13. Base plate; 14. Positioning hole; 15. Rotation hole; 16. Shaft hole; 17. Connection hole; 18. First waterproof ring; 19. Second waterproof ring; 20. Terminal assembly. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0022] An electric vehicle speed sensor, such as Figures 1 to 4As shown, it includes a plastic shell 1, a plastic body 2, an axis core 3 rotatably arranged in the plastic shell 1, a torsion spring 4 movably sleeved on the outer periphery of the axis core 3, and a brush assembly 5 installed at one end of the axis core 3, the two ends of the torsion spring 4 are respectively connected to the plastic shell 1, the plastic body 2 is installed at one end of the plastic shell 1, and a resistor assembly 6 is arranged on the side of the plastic body 2 close to the brush assembly 5. The resistor assembly 6 includes two symmetrically arranged resistor bodies 7, and the brush assembly 5 includes two symmetrically arranged brush bodies 8. The brush bodies 8 correspond to the resistor bodies 7 one by one and slide in abutment with each other, and each resistor body 7 is connected to a terminal assembly 20; wherein, the resistor body 7 is arranged in an arc shape. Specifically, the utility model has a novel structure and an ingenious design. When the utility model is working, the shaft core 3 is driven to rotate by an external driving shaft. When the shaft core 3 rotates, the torsion spring 4 is deformed to facilitate subsequent resetting. At the same time, the rotation of the shaft core 3 drives the brush body 8 to rotate synchronously, so that the brush body 8 slides on the resistor body 7, and then the resistance is adjusted by moving the brush body 8 on the resistor, thereby realizing speed regulation. Among them, the resistor assembly 6 includes two symmetrically arranged resistor bodies 7, and the brush assembly 5 includes two symmetrically arranged brush bodies 8. The brush body 8 corresponds to the resistor body 7 in a one-to-one manner and slides and abuts against it, and has two loop structures. Even if one of the resistor bodies 7 is damaged, the other resistor body 7 can still work, thereby ensuring its working reliability and stability, which is beneficial to improving the service life and reducing the replacement and maintenance costs.

[0023] In the embodiment of the present application, a connector protection shell 9 is further installed at the front end of the plastic body 2, the terminal assembly 20 is located in the connector protection shell 9, an access opening 10 is opened at the front end of the connector protection shell 9, and the terminal assembly 20 is exposed in the access opening 10. Specifically, under this setting, the terminal assembly 20 is protected from external impact and the product reliability is improved.

[0024] In the embodiment of the present application, the plastic body 2 is provided with a positioning plate 11, and the positioning plate 11 is provided with a positioning convex column 12. The resistor assembly 6 also includes a substrate 13, and the substrate 13 is provided with a positioning hole 14. The positioning convex column 12 is penetrated in the positioning hole 14. The substrate 13 is fixed to the side of the plastic body 2 close to the brush assembly 5, and the resistor body 7 is fixed to the side of the substrate 13 close to the brush assembly 5. Specifically, under the above setting, the positioning convex column 12 of the positioning plate 11 is used to position and install the substrate 13 on the one hand, and on the other hand, a rotation hole 15 is provided in the middle of one end of the shaft core 3, and the front end of the positioning convex column 12 protrudes into the rotation hole 15 to realize the positioning of the shaft core 3, to ensure that the rotation of the shaft core 3 will not deviate, and thus to ensure the reliability and stability of the sliding contact between the brush body 8 and the resistor body 7.

[0025] In the embodiment of the present application, the plastic shell 1 is further provided with an axial hole 16, and the other end of the shaft core 3 is provided with a connecting hole 17, and the axial hole 16 is provided corresponding to the connecting hole 17. Specifically, under this arrangement, it is convenient for the external drive shaft to extend from the axial hole 16 and then connect with the connecting hole 17, so as to drive the shaft core 3 to rotate.

[0026] In the embodiment of the present application, the outer wall of the shaft hole 16 is provided with a first waterproof ring 18. The outer periphery of the shaft core 3 is provided with a second waterproof ring 19. Specifically, under this arrangement, it is beneficial to improve the waterproof effect.

[0027] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. An electric vehicle speed sensor, characterized in that: It includes a plastic shell, a plastic body, an axis core rotatably arranged in the plastic shell, a torsion spring movably sleeved on the outer periphery of the axis core, and a brush assembly installed at one end of the axis core, the two ends of the torsion spring are respectively connected to the plastic shell, the plastic body is installed at one end of the plastic shell, a resistor assembly is arranged on one side of the plastic body close to the brush assembly, the resistor assembly includes two symmetrically arranged resistor bodies, the brush assembly includes two symmetrically arranged brush bodies, the brush bodies correspond to and slide against the resistor bodies one by one, and each resistor body is connected to a terminal assembly.

2. The electric vehicle speed regulating sensor according to claim 1, characterized in that: A connector protection shell is also installed at the front end of the plastic body. The terminal assembly is located in the connector protection shell. An access opening is opened at the front end of the connector protection shell. The terminal assembly is exposed at the access opening.

3. The electric vehicle speed regulating sensor according to claim 1, characterized in that: The plastic body is provided with a positioning plate, and the positioning plate is provided with a positioning boss. The resistor assembly also includes a substrate, and the substrate is provided with a positioning hole, and the positioning boss is passed through the positioning hole. The substrate is fixed on a side of the plastic body close to the brush assembly, and the resistor body is fixed on a side of the substrate close to the brush assembly.

4. The electric vehicle speed regulating sensor according to claim 3, characterized in that: A rotation hole is arranged in the middle of one end of the shaft core, and the front end of the positioning boss protrudes into the rotation hole.

5. The electric vehicle speed regulating sensor according to claim 1, characterized in that: The plastic shell is further provided with an axial hole, and the other end of the shaft core is provided with a connecting hole, and the axial hole and the connecting hole are arranged correspondingly.

6. The electric vehicle speed regulating sensor according to claim 5, characterized in that: The outer wall of the shaft hole is sleeved with a first waterproof ring.

7. The electric vehicle speed regulating sensor according to claim 1, characterized in that: A second waterproof ring is sleeved on the outer periphery of the shaft core.

8. The electric vehicle speed regulating sensor according to claim 1, characterized in that: The resistor body is arranged in an arc shape.

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