Automatic tire pressure detection device

Abstract

The application relates to a tire pressure automatic detection device which comprises fixing structures and pressure measuring devices, two groups of fixing structures are sequentially connected in the circumferential groove of a wheel hub, the two groups of fixing structures are connected in head and tail, and the surface of each fixing structure is provided with a pressure measuring device; the pressure measuring device comprises a pressure sensor and an electric energy generating device, the pressure sensor is electrically connected with the electric energy generating device, the vibration path of the vibrator of the electric energy generating device forms a circle, the center of which is located on the central axis of the wheel hub, and the vibrator generates electric energy when the rotating speed of the wheel hub changes; the application directly realizes accurate detection of tire pressure without destroying the rotating symmetry of the wheel.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of tire pressure automatic detection device, belongs to tire pressure detection technical field. BACKGROUND

[0002] Vehicle is by tire ground rolling forward, and the working environment of tire is very bad, such as the various sharp foreign matters of road surface, the high temperature of road surface in summer etc., if tire has problem, driving has no safety.Therefore, tire pressure detection is very necessary.

[0003] There are two kinds of tire pressure detection methods on the market at present: 1, direct tire pressure detection, the pressure sensor in tire can be used to measure the air pressure of tire, and the relevant information is transmitted from tire to automobile master control system by wireless transmitter;2, indirect tire pressure detection, rely on calculating tire rolling radius to detect air pressure, when tire pressure decreases, the rolling radius of the wheel becomes smaller, its speed avoids other wheels, and the tire pressure is monitored by comparing the speed.

[0004] In fact, in the existing life, the application of indirect tire pressure detection of automobile is more, and the reason why indirect tire pressure detection technology appears is that, although the sensor, information transmission and other technologies are relatively mature, the installation of sensor and power source exist problems, because wheel is a high-speed rotating component on vehicle, the symmetry of tire movement must be guaranteed, and the direct wire connection between the inside and outside of tire exists problems, which restricts the large-scale application of direct tire pressure detection, resulting in that the application of direct tire pressure detection is difficult.

[0005] However, compared with direct tire pressure detection, the tire pressure information of indirect tire pressure detection has hysteresis, and the air pressure value cannot be accurately obtained.Therefore, if accurate air pressure value is to be obtained, direct tire pressure detection mode is still needed, and in the prior art, the design of direct tire pressure detection is to punch holes on hub, and then place pressure sensor, which changes the stress structure of hub to some extent, and affects the rotational symmetry of hub.Therefore, it is necessary to design a new tire pressure automatic detection device to realize accurate detection of tire pressure. SUMMARY

[0006] The present application provides a kind of tire pressure automatic detection device, directly realizes accurate detection of tire pressure without destroying the rotational symmetry of wheel.

[0007] The technical scheme adopted by the present application to solve its technical problems is:

[0008] The tire pressure automatic detection device comprises a fixed structure and a pressure measuring device, two groups of fixed structures are sequentially connected in the hub circumferential groove, and the two groups of fixed structures are connected head to tail, and the surface of each fixed structure is provided with a pressure measuring device;

[0009] As a further preferred embodiment of the present application, the pressure measuring device comprises a pressure sensor and an electric energy generating device, the pressure sensor is electrically connected to the electric energy generating device, the vibration path of the vibrator of the electric energy generating device forms a circle, the center of which is located on the central axis of the hub, when the rotating speed of the hub changes, the vibration of the vibrator generates electric energy;

[0010] As a further preferred embodiment of the present application, the fixing structure comprises a base, a substrate and a clamping part, the bottom surface of the substrate is attached to the circumferential groove of the hub, the surface of the substrate is attached to the base, when the substrate and the base are arranged in a ring around the circumferential surface of the hub, the annular structure formed by the two is coaxial with the hub;

[0011] And when one end of the base is connected to the other end to form an annular structure, a clamping part is formed;

[0012] As a further preferred embodiment of the present application, the clamping part comprises a hole type buckle and a ring type head, the hole type buckle is installed at one end of the base, and the ring type head is installed at the other end of the base;

[0013] As a further preferred embodiment of the present application, the clamping part comprises a clamp type buckle and a tooth type head, the clamp type buckle comprises a clamp seat and a clamp piece, the clamp seat is fixed on the base, two shaft holes are formed in the top of the clamp seat, and the shaft of the clamp piece is sequentially arranged in the shaft holes, i.e. the clamp piece can rotate relative to the shaft;

[0014] One end of the clamp piece extends outward to form a clamp head, the clamp head comprises an extension end, the extension end is in the same plane as the surface of the clamp piece, and the end of the extension end continues to bend and extend in the direction of the base; the other end of the clamp piece also extends outward to form a clamp tail, and the clamp tail is provided with an elastic pad relative to the end surface of the base;

[0015] The tooth type head comprises a plurality of clamping teeth arranged in sequence near the end of the base, and scales are arranged on both sides of the clamping teeth on the surface of the base;

[0016] As a further preferred embodiment of the present application, the gravity moment of the clamp tail is greater than the gravity moment of the clamp head;

[0017] As a further preferred embodiment of the present application, the pressure measuring device further comprises a signal pairing transmission system and an energy storage battery, the pressure sensor, the signal pairing transmission system, the energy storage battery and the electric energy generating device are sequentially electrically connected;

[0018] As a further preferred embodiment of the present application, the pressure measuring device further comprises a temperature sensor;

[0019] As a further preferred embodiment of the present application, the substrate is made of an elastic material.

[0020] Through the above technical solutions, compared with the prior art, the present application has the following beneficial effects:

[0021] 1. The tire pressure automatic detection device provided by the application can guarantee the symmetry of wheel rotation and avoid the danger of vehicle in the driving process by sequentially connecting two groups of fixed structures in the groove in the hub circumference.

[0022] 2. The tire pressure automatic detection device provided by the application can accurately detect the tire pressure of the wheel by directly installing the pressure measuring device on the hub through the fixed structure.

[0023] 3. The tire pressure automatic detection device provided by the application comprises an electric energy generating device, which can generate electric energy by the vibration generated when the wheel runs, and does not need to rely on external power source, thereby reducing the manufacturing cost without damaging the hub structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below in combination with the drawings and examples.

[0025] Fig. 1 is the first preferred embodiment structure diagram of the fixed structure provided by the application;

[0026] Fig. 2 is the schematic diagram of the first preferred embodiment of the fixed structure installed on the hub provided by the application;

[0027] Fig. 3 is the assembly schematic diagram of the first preferred embodiment of the fixed structure provided by the application;

[0028] Fig. 4 is the second preferred embodiment structure diagram of the fixed structure provided by the application;

[0029] Fig. 5 is the enlarged schematic diagram of the connection structure of the second preferred embodiment of the fixed structure provided by the application after assembly;

[0030] Fig. 6 is another angle enlarged schematic diagram of the connection structure of the second preferred embodiment of the fixed structure provided by the application after assembly.

[0031] In the figure: 1 is a base, 21 is a hole type buckle, 22 is a clamp type buckle, 221 is a clamp seat, 222 is a clamp piece, 223 is a clamp piece head, 224 is a clamp piece tail, 225 is an elastic pad, 31 is a ring type clamp head, 32 is a tooth type clamp head, 321 is a clamp tooth, 322 is a scale, 4 is a substrate, 5 is a pressure measuring device, and 6 is a hub. IMPLEMENTATION

[0032] The application will be further described in detail below with reference to the drawings. In the description of the present application, it should be understood that the terms "left side", "right side", "upper portion", "lower portion" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and "first", "second" and the like do not represent the importance of the parts and therefore cannot be understood as a limitation on the present application. The specific dimensions used in the embodiments are only for the purpose of illustrating the technical solutions and do not limit the protection scope of the present application.

[0033] As set forth in the background, in the two ways of direct tire pressure detection and indirect tire pressure detection, in order to obtain more accurate air pressure values to realize accurate detection of tire pressure, direct tire pressure detection is more preferred in actual application, however, since the installation of the detection device directly affects the safety of vehicle driving, how to avoid danger while realizing tire pressure monitoring becomes a problem to be solved at present.

[0034] Based on the above problems, the present application provides a tire pressure automatic detection device, which comprises a fixing structure and a pressure measuring device 5, two groups of fixing structures are sequentially connected in the circumferential groove of the hub 6, the two groups of fixing structures are connected head to tail, and each fixing structure surface is provided with a pressure measuring device; in the present application, as one of the innovations, two groups of fixing structures are installed and arranged in the circumferential groove of the hub in a head-to-tail sequential connection manner, this arrangement can ensure the symmetry of the hub shaft after the tire pressure automatic detection device provided by the present application is installed, and two pressure measuring devices are fixed by the two groups of fixing structures, if both pressure measuring devices are effective and the data is similar, the trust of the data is increased, if one pressure measuring device is abnormal, the other can still work normally, and due to the existence of redundancy, the working reliability of the pressure measuring device is improved.

[0035] Here, the pressure measuring device comprises a pressure sensor, a signal pairing transmission system, an energy storage battery and an electric energy generating device, the above components are sequentially electrically connected, the vibrator vibration path of the electric energy generating device can have a certain arc, when the vehicle is running, the center of the circle formed by the vibrator vibration path is located on or near the hub shaft, and when the hub rotation speed changes, the vibrator vibration generates electric energy. That is, another innovation point of the present application is that the energy supply structure with the pressure sensor, and the generation of electric energy is based on the stable operation of the vehicle, and the aforementioned electric energy generating device is a mechanical energy-electric energy conversion device. Here, the center of the circle where the vibrator vibration path is located needs to be located on or near the hub shaft, and the electric energy generated by the electric energy generating device at this position is more stable, and the energy storage battery can collect and store the electric energy to the maximum extent.

[0036] Of course the whole pressure measuring device is small in size, flat, and its shell is very strong, so as to prolong its service life.

[0037] The aforementioned electric energy generating device containing the vibrator is common in the prior art. The application provides a preferred embodiment, which comprises a straight cylindrical soft magnetic guide rail, a stator and a shell. The straight cylindrical soft magnetic guide rail comprises soft magnetic teeth, an enameled coil, non-magnetic filling material, four soft magnetic tooth surfaces that are symmetrically distributed inward along the axis, half-tooth gaps between the square teeth of adjacent soft magnetic teeth, and the upper and lower ends of the soft magnetic teeth converge at the shaft end. The enameled coil is formed by winding enameled wire around the upper and lower ends of the soft magnetic teeth. The non-magnetic filling material is wrapped around the yoke in a straight cylindrical shape, serving as a guide rail for the movement of the vibrator, and the vibrator can move along the axis in the hollow part. The vibrator comprises a thin cylindrical permanent magnet, thin cylindrical soft magnetic sheets fixed on the upper and lower sides of the permanent magnet, and elastic buffer sheets bonded to the outer side of the soft magnetic sheets. The diameter of the permanent magnet is slightly smaller than the inner diameter of the straight cylindrical guide rail, and the height of the permanent magnet and the height of the soft magnetic sheet are the same as the tooth thickness of the strip tooth. The tooth thickness of the strip tooth is equal to one fourth of the tooth pitch. When the upper soft magnetic sheet of the vibrator is opposite to the square tooth part of two strip teeth, the lower soft magnetic sheet is opposite to the square tooth part of the other two strip teeth. The straight cylindrical guide rail is wrapped with the shell.

[0038] The fixing structure in the application comprises a base band 1, a substrate 4 and a clamping part. The substrate is arranged by directly adhering to the inner groove of the hub, so it needs to have certain elasticity and compressibility, that is, it is made of elastic material, while ensuring that the substrate has a certain thickness, which can tightly hold the fixing structure and the hub, and ensure that the relative position of the fixing structure and the hub does not change. The base band is arranged in a flat shape and can be arranged by adhering the substrate to the groove of the hub.

[0039] The clamping part here gives two preferred embodiments, Figs. 1-3 As shown in the first preferred embodiment, the clamping part comprises a hole type buckle 21 and a ring type clamping head 31. The hole type buckle is installed at one end of the base band, and the ring type clamping head is installed at the other end of the base band. When installed, two groups of fixing structures are connected end to end, that is, a pair of hole type buckles are clamped with adjacent ring type clamping heads, and then the bottom surface of the substrate is wrapped around the inner groove of the hub, and another pair of hole type buckles are clamped with adjacent ring type clamping heads.

[0040] The second preferred embodiment is as follows Figs. 4-6As shown, the clamping portions include the clamping buckle 22 and the toothed clamping head 32, the clamping buckle includes the clamping seat 221 and the clamping piece 222, the clamping seat is fixed on the belt base, two shaft holes are arranged on the top of the clamping seat, the rotating shaft of the clamping piece is sequentially arranged in the shaft holes, that is, the clamping piece can rotate relative to the rotating shaft; one end of the clamping piece extends outward to form the clamping piece head 223, the clamping piece head includes an extension end, the extension end is in the same plane as the surface of the clamping piece, and the end of the extension end is further bent and extends to the belt base; the other end of the clamping piece also extends outward to form the clamping piece tail 224, and the elastic pad 225 is arranged on the end surface of the clamping piece tail relative to the base belt; the toothed clamping head includes a plurality of clamping teeth 321 arranged in sequence near the end of the base belt, and scales 322 are arranged on both sides of the clamping teeth on the surface of the base belt. During installation, the two groups of fixing structures are connected end to end, a pair of clamping buckles are clamped with adjacent toothed clamping heads, the substrate is wrapped around the inner groove of the hub, and then the other pair of clamping buckles is clamped with adjacent toothed clamping heads. In the second preferred embodiment, due to the design of the toothed clamping head, the clamping position of the two pairs of clamping portions can be adjusted, and when the fixing structure is tightly held on the hub, the clamping position scales of the two pairs of clamping portions are consistent. The design of this structure is more versatile.

[0041] In the second preferred embodiment, relative to the rotating shaft of the clamping piece, the gravity moment of the clamping piece tail is greater than that of the clamping piece head 223, that is, the gravity and the force arm need to be designed according to actual needs, and the purpose is that when the wheel rotates, due to the centrifugal force, the clamping piece tail will have a tendency to move away from the hub, and the clamping piece head will tightly clamp the clamping teeth, so as to ensure that the position of the clamping portion does not change.

[0042] The pressure measuring device provided in the application also includes a temperature sensor, which can transmit the temperature information and pressure information in the tire to the main control system of the automobile in real time, and the main control system of the automobile analyzes the change information of the temperature and pressure and gives corresponding display, prompt, alarm or emergency treatment in real time.

[0043] As can be seen, the tire pressure automatic detection device provided in the application has the advantages of reasonable structure, simple and convenient, low cost, direct tire pressure monitoring without destroying the rotational symmetry of the wheel, convenient installation, convenient use and strong versatility.

[0044] Those skilled in the art can understand that unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood as having meanings consistent with those in the prior art, and should not be interpreted in an idealized or overly formal sense unless otherwise defined.

[0045] In the present application, the meaning of "and / or" means that each single existence or both existences are included.

[0046] The meaning of "connection" described in the present application can be a direct connection between components or an indirect connection between components through other components.

[0047] The above-described embodiments according to the present application are merely exemplary and are not intended to limit the present application. A person skilled in the art can make various modifications and changes within the scope of the present application. The technical scope of the present application should be defined by the appended claims rather than the detailed description.

Claims

1. Tire pressure automatic detection device, characterized by: The fixed structure and the pressure measuring device (5) are sequentially connected in the circumferential groove of the hub (6), and the two groups of fixed structures are connected head to tail. The fixed structure comprises a base (1), a substrate (4) and a clamping part. The clamping part comprises a clamping buckle (22) and a toothed chuck (32). The clamping buckle (22) comprises a clamping seat (221) and a clamping piece (222). The clamping piece (222) is rotatable relative to the clamping seat (221). The clamping piece (222) extends outward at one end to form a clamping head (223). The other end of the clamping piece (222) also extends outward to form a clamping tail (224).

2. The apparatus according to claim 1, wherein: The toothed chuck (32) comprises a plurality of clamping teeth (321) arranged sequentially near the end of the base (1).

3. The apparatus according to claim 2, wherein: The gravity moment of the clamping tail (224) is greater than that of the clamping head (223).

4. The apparatus according to claim 1, wherein: The pressure measuring device (5) comprises a pressure sensor and an electric energy generating device.

5. The apparatus according to claim 1, wherein: The pressure sensor and the electric energy generating device are electrically connected. The vibration path of the vibrator of the electric energy generating device forms a circle, and the center of the circle is located on the central axis of the hub (6). When the rotational speed of the hub (6) changes, the vibrator generates electric energy through vibration. The pressure measuring device (5) further comprises a signal pairing transmission system and an energy storage battery. The pressure sensor, the signal pairing transmission system, the energy storage battery and the electric energy generating device are sequentially electrically connected. The pressure measuring device (5) further comprises a temperature sensor. The substrate (4) is made of elastic material.

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