Device for automatically adjusting tire pressure
By designing an automatic adjustment device that utilizes tire rotation and deformation, the tire blowout problem caused by unstable tire pressure is solved, and the tire air pressure is automatically adjusted. The structure is simple and manual operation is required.
Patent Information
- Application Number
- CN202422189240.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The tire pressure of the car tire is unstable during driving, and it is prone to tire blowouts, and cannot be automatically adjusted during driving. It requires manual operation and poor experience.
Design a device that automatically adjusts the tire pressure of the tire, and uses the deformation during the tire rotation as a power source to automatically adjust the tire pressure through the intake and pressure relief check valve, including piston, air intake check valve, air replenishment check valve and pressure relief check valve, to achieve automatic adjustment of the air pressure in the tire.
It realizes automatic stability of tire pressure, avoids tire bursts, has a simple structure, no electrical components and regular maintenance.
Smart Images
Figure CN223173893U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobiles, and more specifically, to a device for automatically adjusting tire pressure. Background Art
[0002] During the driving of an automobile, the tires of the automobile come into contact with the ground. When a foreign object hits the tire, the foreign object squeezes the tire, causing deformation at the contact point between the tire and the foreign object. The tire indents inward, the tire capacity decreases, and the tire pressure rises until it separates from the foreign object. Then the tire returns to its original shape under its plastic deformation force. However, in complex road conditions where there are many foreign objects, the automobile tires constantly come into contact with foreign objects, resulting in continuous deformation at each contact point between the automobile tires and the foreign objects, unstable tire pressure, and frequent tire blowouts; during the use of the automobile, it is impossible to ensure absolute airtightness of the tires, and the tire pressure will slowly decrease over time; due to temperature changes, the tire pressure may also increase or decrease with the increase or decrease of temperature; if the tire is punctured, it will also cause the tire pressure to decrease.
[0003] Currently, all automobiles are unable to inflate automatically during driving and require manual operation, which is very inconvenient and has a poor experience. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a device for automatically adjusting tire pressure, which can release pressure through a pressure relief valve when the tire pressure is too high, and can use the deformation of the tire during rotation as a power source to inflate the tire when the tire pressure is insufficient.
[0005] To achieve the purpose of the utility model, the technical solution adopted is: a device for automatically adjusting tire pressure, including a piston fixedly installed inside the tire, and the piston rod of the piston abuts against the tire tread; an intake check valve communicating with the outside atmosphere and a gas supplement check valve communicating with the inside of the tire are provided on the piston, and both the intake check valve and the gas supplement check valve communicate with the rodless cavity of the piston; a pressure relief check valve for deflating the tire is also included.
[0006] Further, the fixed end of the piston is installed on the wheel hub.
[0007] Further, an exhaust cavity communicating with the inside of the tire is provided at the fixed end of the piston, and the pressure relief check valve is installed on the piston and communicates with the exhaust cavity.
[0008] Further, the exhaust cavity is located inside the piston, and the space of the exhaust cavity is not greater than one-third of the space of the rodless cavity of the piston.
[0009] Further, the telescopic direction of the piston is perpendicular to the tire tread.
[0010] Further, the end face of the piston rod of the piston abutting against the tire tread is spherical.
[0011] The beneficial effects of the present utility model are as follows:
[0012] When the tire is rotating, affected by the vehicle weight, the position where the tire contacts the ground will deform, causing the distance from the position where the tire contacts the ground to the tire axis to be less than the distance from other outer circular positions of the tire to the tire axis. This device uses the change in the distance between the outer circle of the tire and the tire axis as the power source for the piston, causing the piston to continuously and slowly inflate the tire. After the inflation is completed, as the tire rotates, when the position corresponding to the piston rod in the piston is away from the ground, the piston rod of the piston loses the power source of the tire. However, due to the centrifugal force acting on the piston during the rotation of the tire, the piston will extend again and press against the tire tread after being affected by the centrifugal force. When the position corresponding to the piston rod in the piston contacts the ground again and deforms, the piston works again to inflate the tire, and this process repeats, continuously inflating the tire; at the same time, when the air pressure in the tire reaches the limit set by the pressure relief check valve, the pressure relief check valve 6 will automatically open to release some of the gas in the tire into the atmosphere to ensure that the internal air pressure of the tire does not continue to increase.
[0013] When the tire pressure of the present utility model is too high, the pressure can be released through the pressure relief valve. When the tire pressure is insufficient, the deformation of the tire during rotation can be used as the power source to inflate the tire, thereby realizing the automatic adjustment of the tire pressure; at the same time, the structure of the present utility model is simple, without electrical components such as air pumps, and does not require regular maintenance. Description of the Drawings
[0014] The drawings illustrate exemplary embodiments of the present utility model and are used together with the description to explain the principles of the present utility model. These drawings are included to provide a further understanding of the present utility model, and the drawings are included in this specification and form a part of this specification.
[0015] Figure 1 It is a schematic structural diagram of the device for automatically adjusting the tire pressure provided by the present utility model.
[0016] Markings in the drawings and corresponding component names:
[0017] 1. Wheel hub, 2. Tire tread, 3. Piston, 4. Rodless cavity, 5. Intake check valve, 6. Pressure relief check valve, 7. Air replenishment check valve, 8. Exhaust cavity;
[0018] 31. Outer shell, 32. Piston rod. Detailed Embodiments
[0019] The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant content and do not limit the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings.
[0020] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The following will detail the present utility model with reference to the accompanying drawings and embodiments.
[0021] As Figure 1 shown, a device for automatically adjusting the tire pressure provided by the present utility model includes a piston 3. The piston 3 includes a housing 31 and a piston rod 32. The piston rod 32 can extend out or retract into the housing 31. The piston 3 is fixedly installed inside the tire. After the piston 3 is installed, the piston rod 32 abuts against the tire tread 2. When the tire tread 2 is squeezed, the tire tread 2 at the squeezed part will push the piston rod 32 to retract into the housing 31, and the distance between the squeezed part of the tire tread 2 and the tire axis will change. This changed distance is the telescopic distance of the piston rod 32. An intake check valve 5 communicating with the outside atmosphere and a gas replenishing check valve 7 communicating with the inside of the tire are provided on the piston 3. Both the intake check valve 5 and the gas replenishing check valve 7 communicate with the rodless cavity 4 of the piston 3. Among them, the intake check valve 5 allows the outside atmosphere to enter the rodless cavity 4 of the piston 3, and the gas in the rodless cavity 4 of the piston 3 cannot enter the outside atmosphere through the intake check valve 5. The gas replenishing check valve 7 allows the gas in the rodless cavity 4 of the piston 3 to enter the tire, and the gas in the tire cannot enter the rodless cavity 4 of the piston 3 through the gas replenishing check valve 7. The intake check valve 5 and the gas replenishing check valve 7 have a certain interval on the housing 31, so as to ensure that enough air can enter the rodless cavity 4 of the piston 3.
[0022] To avoid tire blowout caused by excessive tire pressure, the device further includes a pressure relief check valve 6. The pressure relief check valve 6 is used to discharge the gas in the tire to the outside atmosphere. Therefore, the pressure relief check valve 6 allows the gas in the tire to enter the outside atmosphere, and the gas in the outside atmosphere cannot enter the tire through the pressure relief check valve 6, thereby realizing the pressure relief function.
[0023] When the tire is rotating, affected by the vehicle weight, the position where the tire contacts the ground will deform, causing the distance from the position where the tire contacts the ground to the tire axis to be less than the distance from other outer circular positions of the tire to the tire axis. This device uses the change in the distance between the outer circle of the tire and the tire axis as the power source for the piston 3, causing the piston 3 to continuously and slowly inflate the tire. After the inflation is completed, as the tire rotates, when the position corresponding to the piston rod 32 on the tire moves away from the ground, the piston rod 32 loses the power source of the tire. However, due to the centrifugal force acting on the piston 3 during the rotation of the tire, the piston 3 will extend again and press against the tire tread 2 after being affected by the centrifugal force. When the position corresponding to the piston rod 32 on the tire contacts the ground again and deforms, the piston 3 works again to inflate the tire. By repeating this process, the tire can be continuously inflated; at the same time, when the air pressure inside the tire reaches the limit set by the pressure relief check valve 6, the pressure relief check valve 6 will automatically open to release some of the gas inside the tire into the atmosphere to ensure that the internal air pressure of the tire does not continue to increase.
[0024] As a further option in this embodiment, to facilitate the fixed installation of the piston 3, the piston 3 can be directly fixed on the wheel hub 1. Specifically, the end of the outer shell 31 away from the piston rod 32 is fixed on the wheel hub 1, and the end of the outer shell 31 away from the piston rod 32 is flush with or higher than the outer surface of the wheel hub 1. In this arrangement, the intake check valve 5 can be installed on the end face of the outer shell 31 away from the piston rod 32, and the air replenishment check valve 7 can be installed in the middle section of the outer shell 31, so that the intake check valve 5 does not need to be connected to the outside atmosphere by an additional pipeline after installation, and the air replenishment check valve 7 does not need to be connected to the inside of the tire by an additional pipeline after installation.
[0025] As a further option in this embodiment, to avoid tire blowout caused by excessive tire internal pressure, an exhaust cavity 8 can also be provided on the outer shell 31, and a through hole is opened on the outer shell 31 to connect the inside of the tire with the exhaust cavity 8. At this time, the pressure relief check valve 6 is installed at the end of the outer shell 31 away from the piston rod 32; when the end of the outer shell 31 away from the piston rod 32 is fixed on the wheel hub 1 and the end of the outer shell 31 away from the piston rod 32 is flush with or higher than the outer surface of the wheel hub 1, the pressure relief check valve 6 can be installed on the end face of the outer shell 31 away from the piston rod 32, so that the pressure relief check valve 6 and the intake check valve 5 are located on the same surface of the outer shell 31, thus eliminating the need for an additional pipeline to connect the pressure relief check valve 6 to the outside atmosphere after installation.
[0026] As a further option of this embodiment, in order to make the outer surface of the outer shell 31 smoother and more beautiful, a partition can be provided inside the outer shell 31, so that the exhaust chamber 8 is a chamber separated from the rodless chamber 4 of the piston 3, that is, the exhaust chamber 8 is a part of the rodless chamber 4 of the piston 3, but there is no communication between the exhaust chamber 8 and the rodless chamber 4 of the piston 3, making the occupied space of the whole device in the tire smaller. When separating the exhaust chamber 8 in the rodless chamber 4 of the piston 3, it should be ensured that the intake one-way valve 5 and the air replenishing one-way valve 7 can communicate through the rodless chamber 4 of the piston 3.
[0027] In the present utility model, without considering the complexity of device installation and the size of the occupied space, a chamber can also be separately provided in the tire. One end of the chamber is installed on the wheel hub 1, and the end of the chamber installed on the wheel hub 1 is flush with or higher than the surface of the wheel hub 1. Finally, the pressure relief one-way valve 6 is installed on the end face of the end of the chamber flush with the surface of the wheel hub 1; it is also possible to directly open a through hole in the wheel hub 1 that communicates the inside of the tire with the outside atmosphere, and then directly install the pressure relief one-way valve 6 in the pressure relief hole.
[0028] As a further option of this embodiment, in order to ensure that the rodless chamber 4 of the piston 3 can fully accommodate the gas entering through the intake one-way valve 5, the space of the exhaust chamber 8 is not greater than one-third of the maximum space of the rodless chamber 4 of the piston 3.
[0029] As a further option of this embodiment, in order to ensure that the tire tread 2 can push the piston rod 32 to contract into the outer shell 31 as much as possible when being squeezed, when installing the piston 3, it should be ensured that the telescopic direction of the piston 3 is perpendicular to the tire tread 2, so that the tire tread 2 can push the piston rod 32 to contract into the outer shell 31 at the first moment of being squeezed, thereby ensuring that the gas entering the rodless chamber 4 of the piston 3 can enter the tire through the air replenishing one-way valve 7 as much as possible.
[0030] As a further option of this embodiment, in order to prevent the piston rod 32 from suddenly hitting the tire due to centrifugal force and causing damage to the tire, the end face of the piston rod 32 that abuts against the tire tread 2 can be set to be spherical.
[0031] As a further option of this embodiment, in order to reduce the impact force of the piston rod 32 on the tire tread 2 when the piston rod 32 suddenly hits the tire due to centrifugal force, a rubber cap can also be sleeved on the end of the piston 3 that abuts against the tire tread 2. At this time, the end face of the piston rod 32 that abuts against the tire tread 2 does not need to be set to be spherical, and the end face of the rubber cap that abuts against the tire tread 2 can be set to be spherical.
[0032] After the present utility model is specifically installed on the wheel hub 1 of a vehicle tire, when the tire rotates, the piston rod 32 will automatically move closer to the tire tread 2 under the action of centrifugal force. During the continuous rotation of the tire, due to the self-weight of the vehicle itself, the tread of the position where the tire contacts the ground will inevitably deform. When the tire deforms, the tire tread 2 pushes the piston rod 32 to contract into the housing 31, the space of the rodless cavity 4 in the piston 3 becomes smaller, and the pressure in the rodless cavity 4 in the piston 3 increases. Since the intake one-way valve 5 only allows the gas in the outside atmosphere to enter the rodless cavity 4 of the piston 3, the gas in the rodless cavity 4 of the piston 3 can only enter the tire interior through the air replenishing one-way valve 7 at this time. When the tire rotates through a certain angle, the tread shape automatically recovers, and the piston rod 32 extends out of the housing 31 again under the action of centrifugal force and moves closer to the tire tread 2. At this time, the space of the rodless cavity 4 in the piston 3 becomes larger, the pressure in the rodless cavity 4 in the piston 3 becomes smaller, and the gas in the outside atmosphere naturally enters the rodless cavity 4 of the piston 3 through the intake one-way valve 5.
[0033] Due to the continuous rotation of the tire, the above process is continuously repeated, so that the gas in the outside atmosphere is continuously replenished into the tire interior to achieve the purpose of automatically inflating the tire. When continuously inflating the tire causes the tire pressure to increase, when the air pressure reaches the limit value set by the pressure relief one-way valve 6, the pressure relief one-way valve 6 will automatically open to release some of the gas in the tire into the atmosphere to ensure that the internal air pressure of the tire will not continue to increase; however, after some gas in the tire is discharged and the internal pressure of the tire returns below the limit value, the pressure relief one-way valve 6 will automatically close to ensure the tire pressure.
[0034] In the description of this specification, the description with reference to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.
[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0036] Those skilled in the art should understand that the above embodiments are only for clearly illustrating the present utility model, rather than limiting the scope of the present utility model. For those skilled in the art, other changes or modifications can be made based on the above disclosure, and these changes or modifications are still within the scope of the present utility model.
Claims
1. An apparatus for automatically adjusting tire pressure, characterized in that, It includes a piston (3) fixedly installed inside the tire, and the piston rod (32) of the piston (3) abuts against the tire tread (2); an intake check valve (5) communicating with the outside atmosphere and a supplementary air check valve (7) communicating with the inside of the tire are provided on the piston (3), and both the intake check valve (5) and the supplementary air check valve (7) communicate with the rodless cavity (4) of the piston (3); it also includes a pressure relief check valve (6) for deflating the tire.
2. The device for automatically adjusting tire pressure according to claim 1, characterized in that, The fixed end of the piston (3) is installed on the wheel hub (1).
3. The device for automatically adjusting the tire pressure according to claim 1, characterized in that, The telescopic direction of the piston (3) is perpendicular to the tire tread (2).
4. The device for automatically adjusting tire pressure according to claim 1, wherein, The end face of the piston rod (32) of the piston (3) that abuts against the tire tread (2) is spherical.
5. The device for automatically adjusting tire pressure according to any one of claims 1 to 4, characterized in that, An exhaust cavity (8) communicating with the inside of the tire is further provided at the fixed end of the piston (3), and the pressure relief check valve (6) is installed on the piston (3) and communicates with the exhaust cavity (8).
6. The device for automatically adjusting the tire pressure according to claim 5, characterized in that The exhaust cavity (8) is located inside the piston (3), and the space of the exhaust cavity (8) is not greater than one-third of the space of the rodless cavity (4) of the piston (3).