Stroke sensing device for booster

Abstract

The invention discloses a stroke sensing device for a booster, and relates to the technical field of automobile parts, the stroke sensing device utilizes a sensor to sense the position of a magnetic core, sends a normally open signal through a signal line to ensure that other equipment can respond in time, and when a piston is reset, the magnetic core is synchronously reset and cuts off the signal to form a reliable switch control mechanism. In order to solve the problem that the piston stroke is prolonged due to abrasion of a clutch friction plate, the magnetic core moves to the step between the first cavity and the second cavity in the shell and abuts against the magnetic core through the middle step, meanwhile, the piston drives the pull rod to slide in the magnetic core and the hoop for fine adjustment, structural interference is avoided, and the service life of the piston is prolonged. And stable limiting of the magnetic core is maintained through the elastic force of the hoop, so that the accuracy of stroke induction and the long-acting stability of the device are ensured, the device can adapt to stroke changes, the reliability of the clutch friction plate under the abrasion working condition is remarkably improved, and meanwhile the maintenance cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile components, and in particular relates to a stroke sensing device for a booster. Background Art

[0002] A clutch booster is a hydraulic or pneumatic auxiliary device used to reduce the clutch operating force. It is usually installed in the vehicle's clutch operating system. It amplifies the driver's pedal operating force through hydraulic or pneumatic pressure to make clutch separation easier. It is mainly composed of a hydraulic cylinder, piston, push rod and other components. When working, it uses the hydraulic pressure to open the intake valve to provide air pressure to push the piston, and then drives the clutch release bearing through the push rod, thereby reducing the force the driver exerts on the clutch.

[0003] Traditional clutch booster stroke sensing mostly uses fixed sensors. However, as the clutch friction plate wears, the piston stroke gradually increases. Traditional detection methods are difficult to adapt to this change, resulting in reduced sensing accuracy or even failure. To solve the above problem, we provide a booster stroke sensing device. Summary of the Invention

[0004] The purpose of the present invention is to provide a stroke sensing device for a booster to solve the problem proposed in the above background technology that the stroke sensing of traditional clutch boosters mostly uses fixed sensors, but as the clutch friction plate wears, the piston stroke will gradually increase, and the traditional detection method is difficult to adapt to this change, resulting in a decrease in sensing accuracy or even failure.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A stroke sensing device for a booster, comprising a booster, wherein the booster includes a cylinder body, a fuel cylinder body bolted to one side of the cylinder body, a piston disposed inside the cylinder body, and a sensing mechanism disposed on the bottom side of the fuel cylinder body; The sensing mechanism includes a shell, a sensor is installed inside the shell, a pull rod is provided inside the shell, one end of the pull rod is fixedly connected to the piston, a magnetic core is sleeved on the surface of the pull rod, a clamp is sleeved on the inside of the magnetic core, and the inside of the clamp is sleeved on the pull rod, a first cavity adapted to the magnetic core is opened inside the shell, and a second cavity adapted to the pull rod is opened inside the shell.

[0006] Preferably, a mounting groove adapted to the clamp is provided on the surface of the magnetic core, and a socket is fixedly connected to the bottom of the shell.

[0007] Preferably, a mounting bolt is sleeved inside the housing, and one end of the mounting bolt is threadedly connected to the cylinder body.

[0008] Preferably, a piston rod is slidably sleeved inside the high-pressure sealing ring of the oil cylinder body, one end of the piston rod is fixedly connected to the piston, and a push rod is installed on one side of the piston.

[0009] The present invention has the following beneficial effects: The device drives the coordinated movement of the pull rod and the magnetic core through the piston, uses the sensor to sense the position of the magnetic core, and sends a normally open signal through the signal line to ensure that other equipment can respond in time. When the piston is reset, the magnetic core is synchronously reset and the signal is disconnected, forming a reliable switch control mechanism. To address the problem of extended piston stroke caused by wear of the clutch friction plate, the magnetic core moves to the step between the first cavity and the second cavity in the shell, and the magnetic core is supported by the middle step to limit its further displacement. At the same time, the piston drives the pull rod to slide fine-tuning inside the magnetic core and the clamp, which not only avoids structural interference, but also maintains the stable limit of the magnetic core through the elastic force of the clamp, thereby ensuring the accuracy of stroke sensing and the long-term stability of the device. The device has a compact structure, sensitive response, and can adapt to stroke changes, significantly improving the reliability of the clutch friction plate under wear conditions, while reducing maintenance costs, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic three-dimensional diagram of the structure of the present invention; Figure 2 It is a schematic three-dimensional diagram of the structure of the present invention; Figure 3 It is a partial structural cross-sectional view of the present invention; Figure 4 It is a partial structural cross-sectional view of the present invention; Figure 5 It is an exploded view of the local structure of the present invention.

[0011] Figure numerals: 1. Booster; 11. Cylinder body; 12. Oil cylinder body; 13. Piston rod; 14. Piston; 15. Push rod; 2. Sensing mechanism; 21. Housing; 22. Pull rod; 23. Magnetic core; 24. Clamp; 25. Mounting groove; 26. Socket; 27. Mounting bolt; 28. Sensor. DETAILED DESCRIPTION

[0012] The present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Example 1:

[0014] refer to Figure 1-5 A stroke sensing device for a booster includes a booster 1. The booster 1 includes a cylinder body 11. A cylinder body 12 is bolted to one side of the cylinder body 11. A piston 14 is provided inside the cylinder body 11. A sensing mechanism 2 is provided on the bottom side of the cylinder body 12. The sensing mechanism 2 includes a shell 21, a sensor 28 is installed inside the shell 21, a pull rod 22 is provided inside the shell 21, one end of the pull rod 22 is fixedly connected to the piston 14, a magnetic core 23 is sleeved on the surface of the pull rod 22, a clamp 24 is sleeved on the inside of the magnetic core 23, and the inside of the clamp 24 is sleeved on the pull rod 22. A first cavity adapted to the magnetic core 23 is opened inside the shell 21, and a second cavity adapted to the pull rod 22 is opened inside the shell 21. The device has a compact structure, sensitive response, and can adapt to stroke changes, which significantly improves the reliability of the clutch friction plate under wear conditions, while reducing maintenance costs, and has high practical value.

[0015] Specifically, when the piston 14 moves to the right, the piston 14 drives the pull rod 22 to move, and at the same time the pull rod 22 drives the magnetic core 23 to move to the right, so that the sensor 28 senses the magnetic core 23 and sends a normally open signal to other devices through the signal line, thereby effectively sensing and controlling the stroke of the device.

[0016] refer to Figure 5 The surface of the magnetic core 23 is provided with a mounting groove 25 adapted to the clamp 24. The bottom of the shell 21 is fixedly connected with a socket 26. The socket 26 facilitates the connection of the signal line plug. By setting the mounting groove 25, the clamp 24 is easy to install, and the clamp 24 is elastic.

[0017] refer to Figure 3 The interior of the housing 21 is provided with a mounting bolt 27 , one end of the mounting bolt 27 is threadedly connected to the cylinder body 12 . By providing the mounting bolt 27 , the housing 21 and the cylinder body 12 can be easily installed.

[0018] refer to Figure 3 The internal sliding sleeve of the high-pressure sealing ring of the oil cylinder body 12 is connected with a piston rod 13, one end of the piston rod 13 is fixedly connected to the piston 14, and a push rod 15 is installed on one side of the piston 14.

[0019] Brief description of the usage process: When the piston 14 moves to the right, the piston 14 drives the pull rod 22 to move, and at the same time, the pull rod 22 drives the magnetic core 23 to move to the right, so that the sensor 28 senses the magnetic core 23 and sends a normally open signal to other devices through the signal line. After the piston 14 is reset, the piston 14 drives the magnetic core 23 to reset through the pull rod 22, and the normally open signal is disconnected. At the same time, because the wear of the clutch friction plate will cause the reset stroke of the piston 14 to become longer and longer, the magnetic core 23 moves to the step between the first cavity and the second cavity in the shell 21, and the magnetic core 23 is supported by the middle step, so that the piston 14 drives the pull rod 22 to slide fine-tune inside the magnetic core 23 and the clamp 24. After fine-tuning, the magnetic core 23 continues to be limited by the elastic force of the clamp 24, thereby effectively sensing and controlling the stroke of the device.

[0020] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A stroke sensing device for a booster, comprising a booster (1), wherein the booster (1) comprises a cylinder body (11), a fuel cylinder body (12) being bolted to one side of the cylinder body (11), and a piston (14) being provided inside the cylinder body (11), characterized in that: A sensing mechanism (2) is provided on the bottom side of the oil cylinder body (12); The sensing mechanism (2) includes a shell (21), a sensor (28) is installed inside the shell (21), a pull rod (22) is provided inside the shell (21), one end of the pull rod (22) is fixedly connected to the piston (14), a magnetic core (23) is sleeved on the surface of the pull rod (22), a clamp (24) is sleeved inside the magnetic core (23), the inside of the clamp (24) is sleeved on the pull rod (22), a first cavity adapted to the magnetic core (23) is provided inside the shell (21), and a second cavity adapted to the pull rod (22) is provided inside the shell (21).

2. A stroke sensing device for a booster according to claim 1, characterized in that: A mounting groove (25) adapted to the clamp (24) is provided on the surface of the magnetic core (23), and a socket (26) is fixedly connected to the bottom of the housing (21).

3. The stroke sensing device for a booster according to claim 1, characterized in that: The interior of the housing (21) is sleeved with a mounting bolt (27), and one end of the mounting bolt (27) is threadedly connected to the oil cylinder body (12).

4. The stroke sensing device for a booster according to claim 1, characterized in that: A piston rod (13) is slidably sleeved inside the high-pressure sealing ring of the oil cylinder body (12), one end of the piston rod (13) is fixedly connected to the piston (14), and a push rod (15) is installed on one side of the piston (14).

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