Clutch displacement sensor for commercial vehicle

Abstract

The utility model discloses a clutch displacement sensor for a commercial vehicle, relates to the technical field of displacement sensors, and aims to solve the problem that after the length of magnetic steel of an existing clutch displacement sensor for the commercial vehicle is increased, the distance between two magnetic poles of the magnetic steel is too long, and the magnetic field of the central section of the magnetic steel is weak, so that the measurement sensitivity is reduced. The device comprises a magnetic steel support, a magnetic steel I, a magnetic steel II and a magnetic conductive sheet. The magnetic steel support is provided with a fixing groove, a magnetic conductive sheet is fixed in the fixing groove, two ends of the fixing groove are respectively fixed with a magnetic steel I and a magnetic steel II, the magnetic steel I and the magnetic steel II are both attached to the magnetic conductive sheet, and the left end and the right end of the magnetic conductive sheet are both provided with extension parts. And a composite magnetic field is formed between the magnetic steels, so that the magnetic field intensity of the displacement sensor is improved, and the measurement sensitivity is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of displacement sensors, in particular to a clutch displacement sensor for commercial vehicles. Background Art

[0002] A displacement sensor detects the amount of movement and converts it into an electrical signal. It's an essential measuring device in a car's clutch system. The clutch displacement sensor provides the engine computer with a signal indicating the clutch's engagement level. The engine computer then measures changes in engine speed and increases or decreases fuel injection, ensuring smooth shifting and acceleration.

[0003] However, existing clutch displacement sensors utilize a single magnet. This structure suffers from practical drawbacks such as a small measurement range, low accuracy, and poor interference resistance. To address these issues, existing displacement sensors have employed a method to increase the magnet's length, generating a wider magnetic field to increase the magnetic field range and improve interference resistance. However, while increasing the magnet's length increases the magnetic field range, it also results in a greater distance between the magnet's poles, resulting in a weaker magnetic field in the magnet's center, which reduces measurement sensitivity. Utility Model Content

[0004] In order to solve the problem that in the existing clutch displacement sensor for commercial vehicles, after the length of the magnet is increased, the distance between the two magnetic poles of the magnet is too far, the magnetic field in the center section of the magnet is weak, and the measurement sensitivity is reduced, the utility model provides a clutch displacement sensor for commercial vehicles to solve the problems raised in the above background technology.

[0005] The technical solution of the utility model is:

[0006] A clutch displacement sensor for commercial vehicles, comprising a magnetic steel bracket, magnetic steel I, magnetic steel II and a magnetic conductive sheet;

[0007] A fixing groove is provided on the magnetic steel bracket, a magnetic conductive sheet is fixed in the fixing groove, and magnetic steel I and magnetic steel II are fixed at both ends of the fixing groove respectively, and both magnetic steel I and magnetic steel II are in contact with the magnetic conductive sheet.

[0008] Furthermore, extension portions are provided at both left and right ends of the magnetic conductive sheet.

[0009] Furthermore, the magnetic steel I and the magnetic steel II are rectangular parallelepiped magnetic steels.

[0010] Furthermore, the width of the extension portion is the same as the width of the magnetic steel I and the magnetic steel II.

[0011] Furthermore, the distance between the magnetic steel I and the magnetic steel II is 12.65 mm.

[0012] Furthermore, the opposite magnetic poles of the magnetic steel I and the magnetic steel II are adjacent.

[0013] Furthermore, a plurality of bolt holes are provided on the magnetic steel bracket, a nut slot is provided in the middle section of the bolt hole, and a nut is embedded in each nut slot.

[0014] Furthermore, a connecting portion is provided on the magnetic steel bracket.

[0015] Furthermore, it also includes a sensor body and a connector, the magnetic steel bracket is fixedly connected to the sensor body through a connecting portion, and the sensor body is connected to the connector through a wire.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A clutch displacement sensor for commercial vehicles consists of a magnetic support and a sensor body. The support is provided with a fixing slot that secures the two magnets to maintain a fixed spacing. When the support moves linearly relative to the sensor body, the sensor measures the change in the magnetic field within the support and calculates the displacement distance. Compared to traditional single-magnet displacement sensors, this new sensor utilizes a dual-magnet design, creating a composite magnetic field between the two magnets. This increases the magnetic field strength in the midsection and addresses the issue of decreased sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the upper left perspective isometric view of the magnetic steel bracket;

[0019] Figure 2 This is the upper right perspective isometric view of the magnetic steel bracket;

[0020] Figure 3 This is the exploded diagram of the displacement sensor;

[0021] Figure 4 It is a structural diagram of the magnetic steel and the magnetic conductive sheet;

[0022] Figure 5 It is a structural diagram of the magnetic steel bracket;

[0023] Figure 6 The structural intention of the magnetic sheet;

[0024] Figure 7 This is the longitudinal cross-sectional view of the displacement sensor;

[0025] Figure 8 It is a structural diagram of the magnetic steel bracket and the sensor body.

[0026] In the figure: 1. Magnetic steel bracket; 2. Fixing slot; 3. Magnetic steel I; 4. Magnetic steel II; 5. Magnetic guide plate; 51. Extension part; 61. Nut slot; 62. Nut; 63. Bolt hole; 7. Connecting part; 8. Sensor body; 9. Connecting head. DETAILED DESCRIPTION

[0027] Specific implementation method 1: See Figure 1-4 As shown, a clutch displacement sensor for commercial vehicles, this embodiment includes a magnetic steel bracket 1, a magnetic steel I 3, a magnetic steel II 4 and a magnetic conductive sheet 5;

[0028] A fixing slot 2 is provided on the magnetic steel bracket 1 , in which a magnetic conductive sheet 5 is fixed. Magnetic steel I 3 and magnetic steel II 4 are fixed at both ends of the fixing slot 2 , and both magnetic steel I 3 and magnetic steel II 4 are in contact with the magnetic conductive sheet 5 .

[0029] Specific implementation method 2: See Figure 1-4 As shown, the left and right ends of the magnetic conductive sheet 5 in this embodiment are both provided with extension portions 51 .

[0030] Specific implementation method three: see Figure 1-4 As shown, the magnetic steel I3 and the magnetic steel II4 in this embodiment are rectangular parallelepiped magnetic steels.

[0031] Specific implementation method four: see Figure 1-4 As shown, the width of the extension portion 51 of this embodiment is the same as the width of the magnetic steel I3 and the magnetic steel II4.

[0032] Specific implementation method five: see Figure 1-4 As shown, the distance between the magnetic steel I3 and the magnetic steel II4 in this embodiment is 12.65 mm.

[0033] Specific implementation method six: see Figure 1-4 As shown, the opposite magnetic poles of the magnetic steel I3 and the magnetic steel II4 in this embodiment are adjacent.

[0034] Furthermore, the magnetic support 1 is injection-molded from PF phenolic resin with 30% fiber, offering advantages such as high-temperature resistance and strong toughness. A retaining slot 2 is provided within the fixing slot to limit the magnetic position. Magnets I3 and II4 are each snapped into their corresponding slots, ensuring a 12.65mm spacing between magnets I3 and II4. The north pole of magnet I3 is adjacent to the south pole of magnet II4. A magnetic conductive sheet 5 forms a magnetic field loop at the lower ends of magnets I3 and II4, further concentrating the magnetic field.

[0035] Furthermore, the above-mentioned dual-magnet layout can provide the product with a sufficient effective magnetic field range, which can expand the effective detection range of the displacement sensor to (0-38mm). Compared with the method of lengthening the magnetic steel to increase the magnetic field range, it saves more raw materials and has greater economic value. The dual-magnet structure can form multiple magnetic fields, namely the internal magnetic field formed by the N pole of magnet I3 and the S pole of magnet II4, and the external magnetic field formed by the S pole of magnet I3 and the N pole of magnet II4. The multiple magnetic fields increase the magnetic field strength, thereby improving the measurement accuracy of the product and increasing its anti-interference ability, so that the product can accurately measure the movement position of the clutch actuator.

[0036] Specific implementation method seven: See Figure 1-4 As shown, the magnetic steel bracket 1 of this embodiment is provided with a plurality of bolt holes 63 , a nut slot 61 is provided in the middle of the bolt hole 63 , and a nut 62 is embedded in each nut slot 61 .

[0037] Furthermore, the bolt hole 63 is used to fix the magnetic steel bracket 1 to the moving part of the clutch, so that the clutch actuator can drive the magnetic steel bracket 1 to move relative to the sensor body 8 to measure the degree of clutch engagement. Taking the two bolt holes 63 of this device as an example, the bolt hole 63 is opened on the right end face of the magnetic steel bracket 1 and is perpendicular to the right end face of the magnetic steel bracket. The two bolt holes 63 are symmetrically positioned relative to the fixing groove 2, so that the magnetic steel bracket 1 is evenly stressed and its movement direction is the same as the extension direction of the fixing groove 2. In order to improve the fixing strength, the magnetic steel bracket 1 of this embodiment is fixed with bolts and nuts. A nut groove 61 is opened in the middle section of the bolt hole 63, and a nut 62 is embedded in the nut groove 61. The nut specification is M5. The provision of the nut 62 replaces the fixing method of directly screwing the bolt into the bolt hole 63, thereby improving the fixing strength of the bolt and the magnetic steel bracket 1.

[0038] Specific implementation method eight: see Figure 1-4 As shown, a connecting portion 7 is provided on the magnetic steel bracket 1 of this embodiment.

[0039] Specific implementation method nine: See Figure 1-4 As shown, this embodiment further includes a sensor body 8 and a connector 9. The magnetic steel bracket 1 is fixedly connected to the movable end of the sensor body 8 through the connecting portion 7, and the sensor body 8 is connected to the connector 9 through a wire.

[0040] Furthermore, magnetic support 1 and sensor body 8 work together to measure the clutch engagement level. When the clutch engages, the clutch actuator drives magnetic support 1 to linearly displace relative to sensor body 8. Sensor body 8 measures the magnitude of the magnetic field change during the displacement of magnetic support 1 and calculates the displacement distance. Connector 9 is connected to the engine computer. When the clutch engages, the clutch displacement sensor provides a clutch engagement level signal to the engine computer. The engine computer then measures the change in engine speed and increases or decreases the engine fuel injection rate, ensuring smooth shifting and steady acceleration and deceleration.

Claims

1. A clutch displacement sensor for a commercial vehicle, comprising a magnetic steel bracket (1), characterized in that: It also includes magnetic steel I (3), magnetic steel II (4), a magnetic conductive sheet (5) and a sensor body (8); A fixing groove (2) is provided on the magnetic steel bracket (1), a magnetic conductive sheet (5) is fixed in the fixing groove (2), and magnetic steel I (3) and magnetic steel II (4) are fixed at both ends of the fixing groove (2), and both magnetic steel I (3) and magnetic steel II (4) are in contact with the magnetic conductive sheet (5); A connecting portion (7) is provided on the magnetic steel bracket (1), and the magnetic steel bracket (1) is fixedly connected to the movable end of the sensor body (8) via the connecting portion (7).

2. The clutch displacement sensor for commercial vehicles according to claim 1, characterized in that: Extension portions (51) are provided at both left and right ends of the magnetic conductive sheet (5).

3. The clutch displacement sensor for commercial vehicles according to claim 2, characterized in that: The magnetic steel I (3) and the magnetic steel II (4) are rectangular parallelepiped magnetic steels.

4. The clutch displacement sensor for commercial vehicles according to claim 3, characterized in that: The width of the extension portion (51) is the same as the width of the magnetic steel I (3) and the magnetic steel II (4).

5. The clutch displacement sensor for commercial vehicles according to claim 1, characterized in that: The distance between the magnetic steel I (3) and the magnetic steel II (4) is 12.65 mm.

6. The clutch displacement sensor for commercial vehicles according to claim 1, characterized in that: The opposite magnetic poles of the magnetic steel I (3) and the magnetic steel II (4) are adjacent.

7. The clutch displacement sensor for commercial vehicles according to claim 1, characterized in that: The magnetic steel bracket (1) is provided with a plurality of bolt holes (63), the middle section of the bolt hole (63) is provided with a nut slot (61), and a nut (62) is embedded in each nut slot (61).

8. The clutch displacement sensor for commercial vehicles according to claim 1, characterized in that: It also includes a connecting head (9), and the sensor body (8) is connected to the connecting head (9) through a wire.

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