CN217347375U

CN217347375U - Tire pressure sensor and tire pressure detection system

Info

Publication number: CN217347375U
Application number: CN202221069062.4U
Authority: CN
Inventors: 卢海斌; 张登国
Original assignee: Autel Intelligent Technology Corp Ltd
Current assignee: Autel Intelligent Technology Corp Ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-09-02
Anticipated expiration: 2032-05-06
Also published as: WO2023213231A1

Abstract

The embodiment of the utility model provides a relate to tire pressure detection technical field, disclose a tire pressure sensor and tire pressure detecting system, this tire pressure sensor includes shell, tire pressure determine module and sealing member. The shell is provided with a cavity and a groove body communicated with the cavity, the groove body is provided with a through hole, the through hole is used for communicating the groove body with the outside, and the inner circumferential wall of the groove body is provided with convex ribs. The tire pressure detection assembly is contained in the cavity and comprises a circuit board, a tire pressure detection chip and a wireless transmission module, the tire pressure detection chip and the wireless transmission module are electrically connected with the circuit board, and the tire pressure detection chip is connected to the top of the groove body and seals the opening of the groove body. The sealing element is accommodated in the groove body and is abutted against the convex ribs so that a gap is formed between the outer peripheral surface of the sealing element and the inner peripheral wall of the groove body, and the sealing element is provided with a connecting hole which is communicated with the through hole and the air pressure hole of the tire pressure detection chip. By the mode, the situation of poor assembly caused by the fact that the sealing element is susceptible to burrs can be improved.

Description

Tire pressure sensor and tire pressure detection system

Technical Field

The utility model relates to a tire pressure detects technical field, especially relates to a tire pressure sensor and tire pressure detecting system.

Background

The tire pressure of the tire plays a crucial role in the safe driving of the automobile, and too high or too low tire pressure can cause tire burst or tire breakage. The presence of the tire pressure sensor enables a driver to know the change of the tire pressure of the tire at any time and any place. Furthermore, the tire pressure detection system formed by combining the tire pressure sensor with other control components can automatically detect the tire pressure in the running process of the automobile, and alarm the air leakage and low air pressure of the tire to ensure the driving safety.

The conventional tire pressure sensor generally includes a housing and a tire pressure detecting assembly. The shell can be fixed in an inflating hole of the tire through a connecting piece, and the tire pressure detection assembly is contained in the shell and communicated with the inflating hole of the tire, so that the tire pressure detection assembly obtains the air pressure in the tire and transmits the air pressure of the tire to a receiver on a vehicle in a wireless transmission mode. The sealing between the shell and the tire pressure detecting assembly is particularly important, most of the tire pressure sensors seal the gap between the shell and the tire pressure detecting assembly through the sealing element, but burrs are easily generated on the surface of the sealing element under the influence of a production process, so that the situation of poor assembly between the sealing element and the shell exists.

SUMMERY OF THE UTILITY MODEL

In view of the above, the embodiment of the present invention provides a tire pressure sensor and a tire pressure detecting system, which improve the situation of poor assembly caused by the sealing member being susceptible to burr.

According to an aspect of the embodiment of the utility model, a tire pressure sensor is provided, including shell, tire pressure detection subassembly and sealing member. The shell has the cavity and with the cell body of cavity intercommunication, the cell body is equipped with the through-hole, the through-hole be used for with cell body and external intercommunication, the internal perisporium of cell body is equipped with the fin. The tire pressure detection assembly is contained in the cavity and comprises a circuit board, a tire pressure detection chip and a wireless transmission module, the tire pressure detection chip is electrically connected with the circuit board, and the tire pressure detection chip is connected to the top of the groove body and seals the opening of the groove body. The sealing element is accommodated in the groove body, the sealing element is abutted to the convex ribs, so that a gap is formed between the outer peripheral surface of the sealing element and the inner peripheral wall of the groove body, the sealing element is provided with a connecting hole, and the connecting hole is communicated with the through hole and the air pressure hole of the tire pressure detection chip.

In some optional embodiments, the tank includes a first tank and a second tank that are communicated with each other, the first tank is located at the top of the tank and is communicated with the cavity of the housing, and the second tank is located at the bottom of the tank. The tire pressure detection chip is accommodated in the first groove body and seals the opening of the second groove body, the sealing element is accommodated in the second groove body, the convex ribs are connected to the inner peripheral wall of the second groove body, and the through holes are located in the second groove body.

In some optional embodiments, the gap between the inner peripheral wall of the second channel and the outer peripheral surface of the seal is 0.2mm to 0.6 mm.

In some optional embodiments, the rib comprises a main body part and a guide part connected with the main body part, and the guide part is arranged at one end, close to the first groove body, of the inner peripheral wall of the second groove body. From the first cell body to the direction of second cell body, the thickness of guide portion increases gradually.

In some optional embodiments, the main body portion has an extraction face facing the slot, the extraction face having an extraction angle of 0 ° to 0.5 °.

In some optional embodiments, the number of the convex ribs is four, and four convex ribs are arranged around the inner circumferential wall of the second groove body.

In some optional embodiments, the tire pressure sensor further comprises a sealant, and the sealant is filled in a gap between the inner circumferential wall of the second groove body and the outer circumferential surface of the sealing element, and a gap between the tire pressure detecting chip and the top wall of the second groove body respectively.

In some alternative embodiments, the sealant has a viscosity of 1500-.

In some alternative embodiments, the seal is made of silicone.

According to the utility model discloses another aspect of the embodiment provides a tire pressure detecting system, including the controller and the aforesaid tire pressure sensor, tire pressure sensor passes through wireless transmission module with controller communication connection.

The embodiment of the utility model provides a beneficial effect is: because the sealing member receives the influence of production technology and can be inevitable produces the burr on its periphery, when assembling the sealing member in the cell body of shell, the effort can be applyed to the sealing member to burr and the interior perisporium looks butt of cell body to make this sealing member have the trend of breaking away from the cell body, this can cause the easy assembly of sealing member not in place, the condition that breaks away from in the cell body even. The embodiment of the utility model provides an in, the outer peripheral face of sealing member passes through and forms the clearance between the internal perisporium of fin and cell body, but the burr holding of sealing member is in this clearance. In other words, the burrs on the sealing element are not easy to abut against the inner circumferential wall of the groove body to apply force to the sealing element, so that the situation that the sealing element is not assembled with the shell is improved.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a cross-sectional view of a tire pressure sensor according to an embodiment of the present invention;

FIG. 2 is a schematic view of the second housing of FIG. 1 at an angle;

FIG. 3 is a schematic view of the second housing of FIG. 1 at another angle;

fig. 4 is a cross-sectional view at C-C in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary skilled person in the art without developing the creative work all belong to the protection scope of the present invention.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the description of the present invention, it should be noted that the terms "first", "second", etc. are used to define the components, and are only used for the convenience of distinguishing the corresponding components, and if not stated otherwise, the terms do not have special meanings, and therefore, should not be construed as limiting the scope of the present invention.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to an example shown in fig. 1, fig. 1 is a schematic structural diagram of a tire pressure sensor according to an embodiment of the present invention. The tire pressure sensor includes a housing 10, a tire pressure detecting assembly 20, and a sealing member 30. The housing 10 has a cavity 10a and a groove 121 communicated with the cavity 10a, a through hole 122 communicating the groove 121 with the outside is formed at the bottom of the groove 121, and a rib 123 is formed on the inner peripheral wall of the groove 121. The tire pressure detecting assembly 20 is accommodated in the cavity 10a of the housing 10, the tire pressure detecting assembly 20 includes a circuit board 21, and a tire pressure detecting chip 22 and a wireless transmission module (not shown) electrically connected to the circuit board 21, and the tire pressure detecting chip 22 is connected to the top of the slot 121 and closes the opening of the slot 121. The sealing member 30 is accommodated in the groove body 121, the sealing member 30 abuts against the rib 123, so that a gap is formed between the outer circumferential surface of the sealing member 30 and the inner circumferential wall of the groove body 121, the sealing member 30 is provided with a connecting hole 30a, and the connecting hole 30a communicates the through hole 122 and the air pressure hole of the tire pressure detecting chip 22.

Since the sealing member 30 is affected by the manufacturing process and inevitably generates burrs on the outer circumferential surface thereof, when the sealing member 30 is assembled in the groove 121 of the housing 10, the burrs abut against the inner circumferential wall of the groove 121 to apply a force to the sealing member 30, so that the sealing member 30 tends to be separated from the groove 121, which may cause the situation that the sealing member 30 is easily assembled in place or even separated from the inside of the groove 121. In the embodiment of the present invention, the outer peripheral surface of the sealing member 30 forms a gap between the protruding rib 123 and the inner peripheral wall of the groove body 121, and the burr of the sealing member 30 can be accommodated in the gap. In other words, the burr on the sealing member 30 is no longer liable to abut against the inner peripheral wall of the groove 121 to apply a force to the sealing member 30, so that the poor assembly of the sealing member 30 with the housing 10 is improved.

The specific working process of the tire pressure sensor is as follows: the tire pressure sensor can be installed at an inflating hole of a tire, gas in the tire can enter the groove body 121 of the tire pressure sensor through the through hole 122 and then is limited by the sealing element 30, and directly leads to the air pressure hole of the tire pressure detection chip 22, so that the tire pressure detection chip 22 can detect data such as tire temperature and tire pressure in the tire through the air pressure hole to generate tire state information and transmit the tire state information to the control module of the circuit board 21, and the control module can transmit the generated tire state information to the monitoring device through the wireless transmission module. The monitoring device can be arranged at a position near a driver seat for a driver to check conveniently, and can also be matched with a car factory, integrated in a driving computer and directly displayed on an instrument panel of a vehicle, so that the driver can know whether the state of the tire is abnormal or not at any time. Next, a specific structure of the housing 10 will be explained with reference to the drawings.

Referring to fig. 2 together with fig. 1, fig. 2 is a schematic structural diagram of the first housing 11 in fig. 1. The housing 10 includes a first case 11 and a second case 12. The first housing 11 and the second housing 12 are connected and enclose the cavity 10 a.

Specifically, the second housing 12 is provided with a through hole 122 penetrating through a surface of the second housing 12 close to the cavity 10a and a surface far from the cavity 10a, the surface of the second housing 12 close to the cavity 10a protrudes in the direction of the first housing 11 to form a boss 124, the boss 124 is provided with a groove 121, and the groove 121 includes a first groove 121a and a second groove 121b communicating with each other. The first groove 121a is located at one end of the groove 121 near the top of the boss 124, and is communicated with the cavity 10a of the housing 10. The first groove 121a is adapted to the shape of the tire pressure detecting chip 22, and the first groove 121a is used for accommodating the tire pressure detecting chip 22. The second groove 121b is located at one end of the surface of the second housing 12 close to the cavity 10a, the second groove 121b is used for accommodating the sealing element 30, and the inner peripheral wall of the second groove 121b partially extends towards the central axis direction of the through hole 122 to form the above-mentioned rib 123. The through hole 122 is located in the second groove 121b, and the through hole 122 is used for communicating the second groove 121b with the outside. It is understood that the shape of the through hole 122 is not limited in particular, for example, in the embodiment of the present invention, the through hole 122 is a polygonal prism hole such as a circle, a square, a rectangle, and the like. Similarly, the connection hole 30a of the sealing member 30 is not particularly limited.

Further, the cross-sectional area of the second groove 121b gradually decreases in the direction of the central axis of the through-hole 122. It should be noted that, in the embodiment of the present invention, the first housing 11 and the second housing 12 are both made of nylon and glass fiber. Due to the influence of the manufacturing process of the processing equipment, the second groove 121b of the second housing 12 needs to have a draft angle for smooth demolding, that is, the cross-sectional area of the side of the second groove 121b close to the first groove 121a is smaller than the cross-sectional area of the side of the second groove 121b close to the through hole 122. In addition, the sealing member 30 needs to be in interference fit with the second housing 12 to reduce the connection failure of the sealing member 30 due to vibration, impact, etc., and therefore, the cross-sectional area of the second groove 121b on the side close to the first groove 121a is equal to the cross-sectional area of the sealing member 30. Thus, when the sealing member 30 is mounted in the second groove 121b, the sealing member 30 can continuously apply a force to the rib 123 to perform a positioning function.

Further, the number of the ribs 123 is four, and the four ribs 123 are circumferentially disposed on the inner circumferential wall of the second groove 121b around the axial direction of the through hole 122. Thus, the sealing member 30 can be uniformly applied with the force of the four ribs 123, and the four ribs 123 can play a role in positioning to ensure that the sealing member 30 is centered and not easy to deflect. It should be understood that the number of the ribs 123 is not limited thereto, and may be adjusted according to the actual use requirement, for example, the number of the ribs 123 may also be three, five or more, and only a gap between the outer circumferential surface of the sealing member 30 and the outer circumferential wall of the second groove 121b is required. In addition, the ratio of the total area of the four bosses 124 attached to the sealing member 30 to the area of the outer circumferential surface of the sealing member 30 is 5% to 50%. Preferably, the ratio is 10%. The arrangement is such that the second housing 12 can have a good fixing effect on the sealing member 30, and is also beneficial to saving the manufacturing cost.

Referring to fig. 3 or fig. 2 in combination with fig. 4, fig. 3 is a schematic structural diagram of the first housing 11 in fig. 1 from another view angle, and fig. 4 is a cross-sectional view taken at C-C in fig. 3. The rib 123 includes a body 1231 and a guide part 1232 connected to the body 1231. The guide portion 1232 is located at one end of the second slot 121b close to the first slot 121a, and the thickness of the guide portion 1232 gradually increases as viewed from the first slot 121a toward the second slot 121 b. Since the cross-sectional area of the sealing member 30 is equal to the cross-sectional area of the second groove body 121b on the side close to the through hole 122, the end of the rib 123 close to the first groove body 121a is chamfered, and the sealing member 30 is guided by the guide portions 1232 to be more easily abutted against the main portions 1231 of the rib 123.

Further, the main body portion 1231 has a draft surface facing the central axis direction of the through hole 122, and a draft angle of the draft surface satisfies 0 ° to 0.5 °, based on which a normal mold release of the rib 123 is facilitated while an assembling effect of the sealing member 30 is ensured.

In order to improve the corrosion of the tire pressure detecting chip 22 in contact with moisture inside the tire, the tire pressure sensor further includes a sealant 40. Referring to fig. 1, the sealant 40 is filled in the gap between the inner peripheral wall of the second groove 121b and the outer peripheral surface of the sealing element 30, and the gap between the tire pressure detecting chip 22 and the top wall of the second groove 121 b. Illustratively, the sealant 40 is a flexible sealant, and the viscosity of the flexible sealant is 1500-.

Next, the present invention will be explained in conjunction with an assembly process of the tire pressure sensor. When packaging is performed, the sealing element 30 is firstly inserted into the second groove body 121b along the central axis direction of the through hole 122, the sealing element 30 is abutted against the convex rib 123, and then the sealant 40 is poured into the second groove body 121b, so that the sealant 40 fills a gap between the sealing element 30 and the inner peripheral wall of the second groove body 121 b. After the filling of the sealant 40 is completed, the tire pressure detecting chip 22 is inserted into the first groove 121a and is in pressing contact with the sealing member 30. Under the extrusion effect of the tire pressure detecting chip 22, the gap between the outer peripheral surface of the sealing element 30 and the inner peripheral wall of the first groove body 121a becomes smaller, so that the sealant 40 in the gap overflows into the gap between the tire pressure detecting chip 22 and the top of the second groove body 121b, and after the sealant 40 is solidified, the tire pressure detecting chip 22 can be sealed and fixed in the first groove body 121a, and the packaging is completed.

In some embodiments, the gap between the inner circumferential wall of the second groove 121b and the outer circumferential surface of the seal 30 is 0.2mm to 0.6 mm. In this clearance range, it is ensured that the tire pressure detecting chip 22 and the second housing 12 have good sealing performance after being packaged, and the space occupied by the burr of the sealing member 30 is also considered. It is understood that, in other embodiments, the gap between the inner peripheral wall of the second groove 121b and the outer peripheral surface of the sealing member 30 may be greater than 0.6 mm.

In some embodiments, the sealing member 30 is made of silicone rubber, such as silicone rubber and polyurethane rubber.

Based on same technical concept, the utility model also provides a tire pressure detecting system, including controller and the aforesaid tire pressure sensor, tire pressure sensor accessible wireless transmission module and controller communication connection. For the specific structure of the tire pressure sensor, reference may be made to the above description, and details are not repeated here.

The above-mentioned only be the embodiment of the present invention, not consequently the restriction of the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transform made of the content of the specification and the attached drawings, or directly or indirectly use in other relevant technical fields, all including in the same way the patent protection scope of the present invention.

Claims

1. A tire pressure sensor, comprising:

the device comprises a shell, a first clamping piece and a second clamping piece, wherein the shell is provided with a cavity and a groove body communicated with the cavity, the groove body is provided with a through hole, the through hole is used for communicating the groove body with the outside, and the inner peripheral wall of the groove body is provided with a convex rib;

the tire pressure detection assembly is accommodated in the cavity and comprises a circuit board, a tire pressure detection chip and a wireless transmission module, the tire pressure detection chip and the wireless transmission module are electrically connected with the circuit board, and the tire pressure detection chip is connected to the top of the tank body and closes the opening of the tank body; and

the sealing element is accommodated in the groove body and abutted against the convex ribs, so that a gap is formed between the outer peripheral surface of the sealing element and the inner peripheral wall of the groove body, the sealing element is provided with a connecting hole, and the connecting hole is communicated with the through hole and the air pressure hole of the tire pressure detection chip.

2. The tire pressure sensor according to claim 1, wherein the groove includes a first groove and a second groove that communicate with each other, the first groove being located at a top of the groove and communicating with the cavity of the housing, the second groove being located at a bottom of the groove;

the tire pressure detection chip is accommodated in the first groove body and seals the opening of the second groove body, the sealing element is accommodated in the second groove body, the convex ribs are connected to the inner peripheral wall of the second groove body, and the through hole is located in the second groove body.

3. The tire pressure sensor according to claim 2, wherein a gap between an inner circumferential wall of the second groove and an outer circumferential surface of the sealing member is 0.2mm to 0.6 mm.

4. The tire pressure sensor according to claim 2, wherein the rib includes a main body portion and a guide portion connected to the main body portion, the guide portion being located at an end of the inner circumferential wall of the second groove portion close to the first groove portion;

from the first cell body to the direction of second cell body, the thickness of guide portion increases gradually.

5. The tire pressure sensor of claim 4, wherein the main body portion has a draft surface facing the slot, the draft angle of the draft surface being 0 ° -0.5 °.

6. The tire pressure sensor according to claim 2, wherein the number of the ribs is four, and four ribs are provided around the inner circumferential wall of the second groove body.

7. The tire pressure sensor according to any one of claims 2 to 6, wherein the tire pressure sensor further comprises a sealant, and the sealant is filled in a gap between the inner circumferential wall of the second groove body and the outer circumferential surface of the sealing member, and a gap between the tire pressure detecting chip and the top wall of the second groove body, respectively.

8. The tire pressure sensor of claim 7, wherein the sealant has a viscosity of 1500-4500 cps.

9. The tire pressure sensor of any of claims 1 to 6, wherein the seal is made of silicone.

10. A tire pressure detecting system comprising a controller and the tire pressure sensor according to any one of claims 1 to 9, wherein the tire pressure sensor is communicatively connected to the controller via the wireless transmission module.