Alarm device in air cylinder of clutch booster

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By designing an alarm device in the cylinder of the car clutch booster, the combination of the pinch rod, spring and pressure switch is used to solve the problem of fault caused by the piston moving to the limit position, and the effect of improving driving safety and extending service life is achieved.

CN222977287UActive Publication Date: 2025-06-13YUEQING HONGDA AUTO PARTS CO LTD

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Patent Information

Application Number: CN202422372735.9
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-09-28
Publication Date: 2025-06-13
Estimated Expiration: 2034-09-28

AI Technical Summary

Technical Problem

In automotive transmission systems, the movement of the piston needs to be strictly controlled to avoid moving to the limit position, otherwise it may cause the performance of the clutch booster to be degraded or malfunctioned, affecting the service life.

Method used

A clutch booster is designed to have an in-cylinder alarm device, including a housing, a pin, a spring and a pressure switch. When the piston moves to the limit position, the pin contacts the piston through the collision disc, compresses the spring, and triggers the pressure switch to send an alarm signal.

Benefits of technology

Effectively remind the driver or control system to avoid excessive piston movement, prevent clutch booster failure, extend service life, improve driving safety, and simplify maintenance.

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Abstract

The utility model provides an alarm device in an air cylinder of a clutch booster. The alarm device comprises an air cylinder body, a piston and an alarm device body. The beneficial effects are obvious. On one hand, the driving safety is improved, the alarm device rapidly sends a signal when the piston reaches the limit position, the clutch booster is prevented from being broken down, the safety risk is reduced, the piston is prevented from damaging the air cylinder structure, and the service life is prolonged. On the other hand, the reliability of the device is enhanced, the diameter of each section of the ejector rod is matched with a shell cavity to ensure stability, a sealing ring ensures sealing performance, and a collision disc also enhances the sealing effect. In addition, operation is convenient, a spring enables the ejector rod to automatically reset after alarming, manual intervention is not needed, the structure is simple, maintenance is convenient, maintenance personnel can rapidly position faults and repair the faults, and the maintenance cost and time are reduced. The device is wide in applicability, provides a reliable technical solution for the automobile industry, and is of great significance for guaranteeing the driving safety and improving the performance of the clutch booster.

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Description

Technical Field

[0001] The utility model relates to the technical field of automotive clutch boosters, and particularly relates to an alarm device inside the cylinder of a clutch booster. Background Art

[0002] In the transmission system of an automobile, the clutch booster plays a crucial role. The existing automotive clutch booster usually consists of a housing and a cylinder. The housing is fixed to the cylinder by screws to ensure the stability of the overall structure. A piston is arranged inside the cylinder, and a ball head push rod inside the housing is used to push the piston to move.

[0003] However, during actual use, the movement of the piston needs to be strictly controlled within a certain range to avoid moving to the limit position. If the piston touches the bottom of the cylinder or moves beyond its limit position, it may seriously affect the performance of the clutch booster and even cause failures in the entire transmission system. For example, excessive movement of the piston may damage the internal structure of the cylinder, affect the sealing performance, thereby reducing the boosting effect, increasing the operation difficulty for the driver, and also shortening the service life of the clutch booster. Summary of the Invention

[0004] In view of the problems pointed out in the background art, the utility model proposes an alarm device inside the cylinder of a clutch booster to solve the above technical problems.

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

[0006] An alarm device inside the cylinder of a clutch booster includes a cylinder body. A piston is arranged inside the cylinder body and can move axially along the cylinder body. An alarm device is arranged at the bottom of the cylinder body. The alarm device includes a housing. A push rod that can move axially along the cylinder body is arranged inside the housing. A spring is arranged inside the housing, and the spring can apply an elastic force to the push rod to move towards the piston. A step that prevents the push rod from moving towards the piston is arranged inside the housing. The front end of the push rod extends into the cylinder body. A collision disc is arranged at the front end of the push rod. An opening for the rear end of the push rod to extend out is arranged at the rear end of the housing. A touch switch is connected to the rear end of the housing.

[0007] The utility model is further arranged such that the push rod includes a collision section, a sealing section, a limiting section, and a touch section arranged in sequence from front to back. The diameter of the collision section is smaller than that of the sealing section, the diameter of the sealing section is smaller than that of the limiting section, and the diameter of the touch section is smaller than that of the limiting section.

[0008] The utility model is further arranged such that an installation cavity is arranged inside the housing. The diameter of the installation cavity is equal to that of the limiting section. The spring is arranged inside the installation cavity. A sealing cavity is arranged at the front side of the installation cavity. The diameter of the sealing cavity is equal to that of the sealing section.

[0009] The present utility model is further configured such that a sealing ring is provided between the sealing section and the side wall of the sealing cavity.

[0010] The present utility model is further configured such that the diameter of the collision disc is greater than the diameter of the sealing cavity.

[0011] The present utility model is further configured such that a hole for connecting to the front end of the housing is provided at the bottom of the cylinder body.

[0012] By adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0013] First of all, the driving safety is significantly improved. When the piston moves to the limit position, the alarm device can quickly send a signal to remind the driver or the control system to take measures, effectively avoiding the failure of the clutch booster caused by the excessive movement of the piston, reducing the potential safety risks. At the same time, it prevents the piston from damaging the internal structure of the cylinder, prolongs the service life of the clutch booster, and reduces the possibility of accidents caused by component damage.

[0014] Secondly, the reliability of the device is enhanced. The ingenious matching of the diameters of each section of the push rod and the housing chamber ensures the stability of the push rod during operation. The sealing ring between the sealing section and the sealing cavity guarantees good sealing performance, preventing gas or liquid leakage and maintaining a stable working environment inside the cylinder. The design of the collision disc also further enhances the sealing effect.

[0015] Furthermore, the operation is convenient. The spring enables the push rod to automatically reset after the alarm without manual intervention, ensuring continuous and stable operation. The simple structure also facilitates maintenance, allowing maintenance personnel to quickly locate and repair faults, reducing the maintenance cost and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the alarm device of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] The following reference Figure 1 - Figure 2 will illustrate the present utility model:

[0021] Embodiment: An alarm device in the cylinder of a clutch booster, including a cylinder body 1. The cylinder body 1 serves as the main part of the entire device, providing space and support for the movement of the piston 2. A piston 2 is arranged in the cylinder body 1. The piston 2 can move axially along the cylinder body 1. The normal movement range of the piston 2 along the axis in the cylinder body 1 needs to be strictly controlled to ensure the normal operation of the clutch booster.

[0022] An alarm device is arranged at the bottom of the cylinder body 1. The alarm device includes a housing 3. The housing 3 provides installation and protection space for internal components such as a push rod 4 and a spring 5, ensuring the stability and reliability of the entire alarm device.

[0023] A push rod 4 that can move axially along the cylinder body 1 is arranged in the housing 3. The push rod 4 is a key component for triggering the alarm. When the piston 2 moves to the limit position, it collides with the collision disk 7 at the front end of the push rod 4, thereby pushing the push rod 4 to move.

[0024] A spring 5 is arranged in the housing 3. The spring 5 can apply an elastic force to the push rod 4 to move towards the piston 2. The spring 5 applies an elastic force to the push rod 4 to move towards the piston 2. Under normal circumstances, the elastic force of the spring 5 keeps the push rod 4 in a certain position. When the piston 2 collides with the collision disk 7, the push rod 4 compresses the spring 5, and the spring 5 stores energy. After the alarm is completed, the elastic force of the spring 5 can reset the push rod 4 to prepare for the next alarm.

[0025] A step 6 that prevents the push rod 4 from moving towards the piston 2 is arranged in the housing 3. The step 6 prevents the push rod 4 from moving excessively towards the piston 2 under the action of the spring 5, playing a role in limiting the position and ensuring that the push rod 4 moves within a suitable range.

[0026] The front end of the push rod 4 extends into the cylinder body 1. A collision disk 7 is arranged at the front end of the push rod 4. The collision disk 7 is located at the front end of the push rod 4. When the piston 2 moves to the limit position, it directly collides with the collision disk 7, thereby transmitting the movement of the piston 2 to the push rod 4. The collision disk 7 has a relatively large area, which can provide a relatively large collision contact area, making the force exerted by the piston 2 on the push rod 4 stable and powerful.

[0027] An opening 8 through which the rear end of the ejector rod 4 extends is provided at the rear end of the housing 3. The opening allows the rear end of the ejector rod 4 to extend, enabling the ejector rod 4 to contact the touch switch 9 and trigger an alarm signal.

[0028] A touch switch 9 is connected to the rear end of the housing 3. Touch switch 9: When the ejector rod 4 is pushed by the piston 2 and moves, a touch operation is performed on the touch switch 9, and the touch switch 9 emits an alarm signal to alert the driver or the control system that the piston 2 has reached the limit position.

[0029] By adopting the above technical solution, when the piston 2 moves to the limit position, it collides with the collision disc 7, pushes the ejector rod 4, the ejector rod 4 compresses the spring 5, the ejector rod 4 performs a touch operation on the touch switch 9, the touch switch 9 emits an alarm signal, and then the ejector rod 4 resets under the action of the spring 5 to prepare for the next alarm.

[0030] Working principle: During the operation of the clutch booster, the piston 2 moves normally within the cylinder body 1. When the piston 2 moves to the limit position, it collides with the collision disc 7 at the front end of the ejector rod 4. The force generated by the collision pushes the ejector rod 4 to move towards the rear end of the housing 3, and the ejector rod 4 compresses the spring 5. As the ejector rod 4 moves, the rear end of the ejector rod 4 extends out of the opening of the housing 3 and performs a touch operation on the touch switch 9. After receiving the pressure, the touch switch 9 emits an alarm signal, which can be transmitted to the driver's instrument panel or the vehicle's control system to alert the driver to pay attention to the status of the clutch booster. After the alarm is completed, as the piston 2 leaves the limit position, the elastic force of the spring 5 acts on the ejector rod 4 to reset the ejector rod 4. The collision disc 7 at the front end of the ejector rod 4 returns to the initial position, waiting to trigger the alarm again when the piston 2 reaches the limit position next time.

[0031] Advantages: Timely alarm: This alarm device can quickly emit an alarm signal when the piston 2 reaches the limit position, enabling the driver or the control system to take timely measures to avoid clutch booster failures and safety hazards caused by excessive movement of the piston 2. High reliability: Through the action of the spring 5, the ejector rod 4 can automatically reset after the alarm to prepare for the next alarm. At the same time, the design of components such as the housing 3 and the step 6 ensures the stable and reliable movement of the ejector rod 4, improving the service life of the alarm device. Simple structure: The structure of this alarm device is relatively simple, consisting of several main components, which is easy to install and maintain. This not only reduces production costs but also improves the reliability and stability of the entire clutch booster.

[0032] The ejector rod 4 includes a collision section 41, a sealing section 42, a limiting section 43, and a pressing section 44 arranged in sequence from front to back. The diameter of the collision section 41 is smaller than that of the sealing section 42, the diameter of the sealing section 42 is smaller than that of the limiting section 43, and the diameter of the pressing section 44 is smaller than that of the limiting section 43. Collision section: Located at the very front end of the ejector rod 4, it has the smallest diameter. Its main function is to first contact the piston 2 when the piston 2 moves to the limit position, receive the collision force of the piston 2, and transmit this force to other parts of the ejector rod 4 to trigger the alarm device. Sealing section: Its diameter is larger than that of the collision section. A sealing ring is arranged between the sealing section and the side wall of the sealing cavity, which can effectively prevent gas or liquid leakage and ensure the sealing performance inside the cylinder. This can ensure the normal operation of the clutch booster and prevent external impurities from entering the cylinder and affecting the movement of the piston 2. Limiting section: It has the largest diameter. In the installation cavity of the housing 3, its diameter is equal to that of the installation cavity, enabling the limiting section to move stably in the installation cavity. At the same time, the limiting section plays a role in restricting the movement range of the ejector rod 4 to prevent the ejector rod 4 from moving excessively and damaging the alarm device or affecting its normal operation. Pressing section: Its diameter is smaller than that of the limiting section. When the piston 2 pushes the ejector rod 4 to move, the rear end of the pressing section extends out of the opening of the housing 3 and contacts the pressure switch 9 to trigger an alarm signal.

[0033] An installation cavity 31 is provided inside the housing 3. The diameter of the installation cavity 31 is equal to that of the limiting section 43 of the ejector rod 4. The spring 5 is arranged inside the installation cavity 31. A sealing cavity 32 is provided on the front side of the installation cavity 31. The diameter of the sealing cavity 32 is equal to that of the sealing section 42 of the ejector rod 4. Installation cavity: Its diameter is equal to the diameter of the limiting section of the ejector rod 4, providing an installation space for the spring 5 and the limiting section of the ejector rod 4. The spring 5 is arranged inside the installation cavity, which can apply an elastic force to the ejector rod 4 to move towards the piston 2, ensuring that the ejector rod 4 is in a proper position under normal circumstances and is ready to receive the collision of the piston 2 at any time. Sealing cavity: Located on the front side of the installation cavity, its diameter is equal to the diameter of the sealing section of the ejector rod 4. Cooperating with the sealing section, it provides an installation position for the sealing ring to ensure the sealing performance of the cylinder.

[0034] A sealing ring is provided between the side wall of the sealing section 42 and the sealing cavity 32. The sealing ring is arranged between the sealing section and the side wall of the sealing cavity, playing a sealing role to prevent gas or liquid leakage inside the cylinder and ensuring the normal operation of the clutch booster.

[0035] The diameter of the collision disc 7 is larger than that of the sealing cavity 32. The diameter of the collision disc 7 is larger than that of the sealing cavity, which can ensure that when the piston 2 collides, the collision force can be effectively transmitted to the collision section of the ejector rod 4. At the same time, the larger diameter can also increase the contact area of the collision and improve the sensitivity of the alarm device.

[0036] A hole for connecting the front end of the housing 3 is provided at the bottom of the cylinder body 1 to connect the front end of the housing 3, so that the alarm device is closely combined with the cylinder body 1.

[0037] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An alarm device in a cylinder of a clutch booster, comprising a cylinder body (1), wherein a piston (2) is arranged in the cylinder body (1), and the piston (2) can move axially along the cylinder body (1), and an alarm device is arranged at the bottom of the cylinder body (1), characterized in that: The alarm device comprises a housing (3), a push rod (4) which can move axially along the cylinder body (1) is arranged in the housing (3), a spring (5) is arranged in the housing (3), the spring (5) can exert an elastic force on the push rod (4) to move toward the piston (2), a step (6) is arranged in the housing (3) to prevent the push rod (4) from moving toward the piston (2), the front end of the push rod (4) extends into the cylinder body (1), the front end of the push rod (4) is provided with a collision disk (7), the rear end of the housing (3) is provided with an opening (8) for the rear end of the push rod (4) to extend, and the rear end of the housing (3) is connected to a touch pressure switch (9).

2. The alarm device in the cylinder of a clutch booster according to claim 1, characterized in that: The push rod (4) comprises a collision section (41), a sealing section (42), a limiting section (43), and a contact and pressure section (44) which are arranged in sequence from front to back. The diameter of the collision section (41) is smaller than the diameter of the sealing section (42), the diameter of the sealing section (42) is smaller than the diameter of the limiting section (43), and the diameter of the contact and pressure section (44) is smaller than the diameter of the limiting section (43).

3. The alarm device in the cylinder of a clutch booster according to claim 2, characterized in that: An installation cavity (31) is provided in the housing (3), the diameter of the installation cavity (31) is equal to the diameter of the limiting section (43), the spring (5) is arranged in the installation cavity (31), a sealing cavity (32) is provided on the front side of the installation cavity (31), and the diameter of the sealing cavity (32) is equal to the diameter of the sealing section (42).

4. The alarm device in the cylinder of a clutch booster according to claim 3, characterized in that: A sealing ring is provided between the sealing section (42) and the side wall of the sealing cavity (32).

5. The alarm device in the cylinder of a clutch booster according to claim 3, characterized in that: The diameter of the collision disk (7) is greater than the diameter of the sealing cavity (32).

6. The alarm device in the cylinder of a clutch booster according to claim 1, characterized in that: The bottom of the cylinder body (1) is provided with a hole connected to the front end of the shell (3).