CN210309783U

CN210309783U - Tire pressure sensor

Info

Publication number: CN210309783U
Application number: CN201822211578.8U
Authority: CN
Inventors: 罗永良; 刘英俊
Original assignee: Autel Intelligent Technology Corp Ltd
Current assignee: Autel Intelligent Technology Corp Ltd
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2020-04-14
Anticipated expiration: 2028-12-26

Abstract

The utility model relates to a tire pressure detects technical field, discloses a tire pressure sensor, include: the valve assembly comprises a mounting part and an elastic telescopic structure mounted on the mounting part, and the elastic telescopic structure can elastically stretch out and draw back on at least one side of the mounting part; the sensor assembly is provided with two opposite clamping surfaces, at least one of the clamping surfaces is provided with a lock hole, the installation part is located between the clamping surfaces, and the elastic telescopic structure is inserted into the lock hole. Through elastic telescoping structure is shortening the back, the installation department of valve subassembly can insert two between the clamping face, the installation department of valve subassembly is located two during between the clamping face, elastic telescoping structure can extend automatically and insert the lockhole can be realized the valve subassembly with the sensor subassembly is installed comparatively conveniently to do not need extra instrument.

Description

Tire pressure sensor

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

The direct type tire pressure monitoring system is also called as PSBTPMS, and the PSBTPMS measures the air pressure and temperature of a tire by using a tire pressure sensor installed on the tire, transmits pressure information from the inside of the tire to a tire pressure detecting terminal by using a wireless transmitter, and then displays the air pressure data of the tire. When the tire has high pressure, low pressure and high temperature, the system can give an alarm to prompt the owner. And the automobile owner can set the tire pressure alarm value range and the temperature alarm value by himself according to the automobile type, the habit of using the automobile and the geographical position.

A conventional tire pressure sensor includes a sensor for detecting tire information inside a tire and a valve installed at the sensor for inflating and deflating the tire, and the valve and the sensor are generally connected by a screw fastener.

However, in the process of implementing the present invention, the inventors found that: among present tire pressure sensor, the mode that inflating valve and sensor pass through threaded fastener and be connected, the process of inflating valve and sensor installation is comparatively difficult, and installation time is long, needs extra torque wrench moreover, and the cost is higher. Accordingly, there is a need in the art for improvements.

[ summary of the invention ]

In order to solve the technical problem, an embodiment of the utility model provides a tire pressure sensor is provided, tire pressure sensor's valve assembly and sensor module simple to operate to do not need extra instrument.

In order to solve the technical problem, an embodiment of the utility model provides a following technical scheme:

provided is a tire pressure sensor including: the valve assembly comprises a mounting part, a rod sleeve and an elastic telescopic structure, wherein the mounting part is connected with the rod part, the rod sleeve is sleeved on the rod part, the elastic telescopic structure is mounted on the mounting part, and the elastic telescopic structure can elastically stretch out and draw back on at least one side of the mounting part; the sensor assembly is provided with two opposite clamping surfaces, at least one of the two clamping surfaces is provided with a lock hole, the mounting part is positioned between the two clamping surfaces, and the elastic telescopic structure is inserted into the lock hole; the number of the valve assemblies is at least two, any one of the at least two valve assemblies is connected with the sensor assembly in a replaceable mode, the rod sleeve of one of the at least two valve assemblies is made of a metal material, and the rod sleeve of the other of the at least two valve assemblies is made of a rubber material.

In some embodiments, the mounting portions are in contact with both of the clamping surfaces, respectively.

In some embodiments, the valve assembly comprises a valve stem comprising the mounting portion and the stem portion; the elastic telescopic structure can stretch out and draw back along the radial direction of the valve rod, and the clamping surface is parallel to the axial direction of the valve rod.

In some embodiments, the sensor assembly has a first surface provided with a groove having two of the clamping faces; the mounting portion is inserted into the groove.

In some embodiments, at least one of the clamping surfaces provided with the locking hole is provided with a guide groove interposed between the locking hole and the first surface in the axial direction.

In some embodiments, the depth of the guide groove gradually decreases in a direction along the axial direction and from the first surface toward the lock hole.

In some embodiments, the mounting portion is provided with a mounting hole disposed along the radial direction; the elastic telescopic structure is arranged in the mounting hole.

In some embodiments, the elastically telescopic structure includes a pin and a first elastic member; the pin is sleeved in the mounting hole, and the pin can be retracted into or extended out of the mounting hole along the radial direction; the first elastic piece is used for providing a first elastic force for enabling the pin to extend out of the mounting hole.

In some embodiments, the locking holes are formed in both the clamping surfaces, the mounting hole is provided with two openings in the mounting portion, and the number of the pins is two; each of the pins may protrude from or retract into a corresponding one of the openings of the mounting hole in the radial direction.

In some embodiments, the first elastic member abuts between the two pins.

In some embodiments, the first elastic member is a first compression spring.

In some embodiments, the elastically telescopic structure further includes a bushing mounted to the mounting hole; the bush has along radial setting's inner chamber, the pin cover is established in the inner chamber.

In some embodiments, the valve stem further comprises a vent portion and a mouth portion, the mounting portion, the vent portion, the stem portion and the mouth portion being arranged in the axial direction in that order; the valve rod is provided with a first vent hole and a second vent hole which are communicated with each other, the opening of the first vent hole is arranged in the mouth part, and the opening of the second vent hole is arranged in the vent part; the second vent hole is positioned outside the groove.

In some embodiments, the second vent hole is disposed along the radial direction.

In some embodiments, the valve assembly further comprises a valve cover; the valve cover is in threaded connection with the mouth part.

In some embodiments, the rod sleeve made of metal comprises a seal ring, a washer, and a nut; the sealing ring, the gasket and the nut are sequentially sleeved on the rod part, the nut is in threaded connection with the rod part, the gasket is clamped between the nut and the sealing ring, and the sealing ring is clamped between the ventilation part and the gasket.

In some embodiments, the tire pressure sensor further comprises a metal rod for passing through the second vent hole.

In some embodiments, the sensor assembly includes a base and a support coupled to the base; the base is used for being attached to a rim, and an emitting plate is arranged in the base; the bracket has the first surface.

In some embodiments, the base comprises an upper shell and a shell bottom; the upper shell is connected with the bracket, and the shell bottom is used for being attached to a rim; the upper shell is connected with the shell bottom through laser welding, and the upper shell is connected with the shell bottom to form a containing cavity for containing the emitting plate.

In some embodiments, the bracket includes a bracket body and a latch structure coupled to the bracket body; the bracket body is connected with the base, and the bracket body is provided with the first surface; the two clamping surfaces are provided with mounting ports; the lock catch structure comprises lock plates, the lock plates are provided with the lock holes, each lock plate is opposite to the corresponding mounting opening, and each lock hole is exposed out of one corresponding mounting opening.

In some embodiments, the stent body further has a second surface provided with a pressing groove between the second surface and the groove; slots are formed in the bottoms of the pressing slots, the two slots are located on the two sides of the groove, and each locking plate is located in one corresponding slot; the lock catch structure further comprises a connecting piece, the connecting piece is connected between the two locking pieces, and the connecting piece is in contact with the bottom of the pressing groove.

In some embodiments, the sensor assembly further comprises a pressing piece and a second elastic piece; the pressing piece comprises a moving plate and a pressing plate, the pressing plate is connected between the two moving plates, each moving plate is located in one corresponding slot, and each moving plate abuts against one surface, deviating from the groove, of one corresponding locking plate; the pressing plate is opposite to the connecting piece, and when the pressing plate moves towards the direction close to the connecting piece, each moving plate moves along one corresponding locking piece, so that each moving plate can extrude one corresponding elastic telescopic structure out of the locking hole; the second elastic piece is used for providing a second elastic force for moving the pressing plate towards the direction away from the connecting piece.

In some embodiments, the second elastic member is a second compression spring.

In some embodiments, at least one of the two lock plates is provided with a limiting part, and the limiting part is positioned on one side of the lock plate, which is far away from the groove; a bending plate is arranged between the moving plate and the pressing plate, one end of the bending plate is connected with the moving plate, the other end of the bending plate is connected with the pressing plate, the bending plate is bent into a U shape, so that two ends of the bending plate are opposite, and the limiting part is positioned between two ends of the bending plate; when each moving plate moves along one corresponding locking plate, the bending plate abuts against the limiting part, so that the locking structure and the pressing piece cannot be separated relatively.

Compared with the prior art, in the utility model discloses in the tire pressure sensor, elasticity extending structure is shortening the back, valve assembly's installation department can insert two between the clamping face, valve assembly's installation department is located two during between the clamping face, elasticity extending structure can extend automatically and insert the lockhole can realize valve assembly with sensor assembly installs comparatively conveniently to do not need extra instrument.

[ description of the drawings ]

One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.

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

fig. 2 is an exploded view of the tire pressure sensor shown in fig. 1;

FIG. 3 is an exploded view of a valve assembly of the tire pressure sensor shown in FIG. 2;

FIG. 4 is a cross-sectional view of the valve assembly shown in FIG. 3;

FIG. 5 is an exploded view of another valve assembly of the tire pressure sensor shown in FIG. 2 with parts omitted;

FIG. 6 is a cross-sectional view of the resilient telescoping structure of the valve assembly shown in FIG. 3;

fig. 7 is an exploded view of a sensor assembly of the tire pressure sensor shown in fig. 2;

FIG. 8 is another exploded view of the sensor assembly shown in FIG. 7;

FIG. 9 is a top view of the sensor assembly shown in FIG. 7;

FIG. 10 is a partial cross-sectional view of the sensor assembly shown in FIG. 7;

FIG. 11 is another perspective view of the sensor assembly shown in FIG. 1, including a metal rod.

[ detailed description ] embodiments

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, a tire pressure sensor 100 is provided for one embodiment of the present invention, which includes a sensor assembly 20 and at least two sets of valve assemblies 10 with different specifications. The at least two differently sized valve assemblies 10 are alternatively coupled to the sensor assembly 20. By arranging at least two sets of valve assemblies 10 with different specifications, a user can install the valve assemblies meeting the requirements on the sensor assembly 20 according to the requirements.

Referring to fig. 3 to 5, any one of the at least two sets of valve assemblies 10 with different specifications includes a valve stem 11, a valve cover 12, a stem sleeve 13 and an elastic telescopic structure 14. The valve cover 12 is mounted at one end of the valve rod 11, the elastic telescopic structure 14 is mounted at the other end of the valve rod 11, and the rod sleeve 13 is sleeved between two ends of the valve rod 11.

The valve stem 11 may be made of copper or an alloy of copper, and the valve stem 11 includes a nozzle portion 110, a stem portion 111, a vent portion 112, and a mounting portion 113 arranged and connected in the axial direction O thereof.

The valve stem 11 is provided with a first vent hole 114 and a second vent hole 115 communicating with each other. The first ventilation hole 114 is disposed along the axial direction O, and an opening of the first ventilation hole 114 is disposed in the mouth portion 110. The first vent hole 114 penetrates the mouth portion 110 and the stem portion 111 in this order, and extends to the vent portion 112, and a valve core 116 is provided in the first vent hole 114. The second vent hole 115 is arranged along the radial direction S of the valve stem 11, the second vent hole 115 penetrates the vent portion 112, the first vent hole 114 and the second vent hole 115 communicate with each other in the vent portion 112, and the first vent hole 114 and the second vent hole 115 form a T-shaped hole.

The mouth portion 110 is screwed to the valve cover 12, and the valve cover 12 is used for closing the opening of the first ventilation hole 114. A nut seal 17 is disposed between the valve cover 12 and the nozzle portion 110, and the nut seal 17 is used to improve air tightness between the valve cover 12 and the first ventilation hole 114.

The rod sleeve 13 is sleeved on the rod part 111, and the rod sleeve 13 of any one of the at least two sets of valve assemblies 10 is different from the rod sleeves 13 of the rest sets. The stem sleeve 13 of one of the at least two valve assemblies 10 includes a seal ring 130, a spacer 131, and a nut 132. The gasket 131 and the nut 132 may be made of copper or copper alloy, the gasket 130 may be made of rubber, the gasket 130, the gasket 131, and the nut 132 are sequentially sleeved on the rod portion 111, the gasket 130 is clamped between the gasket 131 and the vent portion 112, the gasket 131 is clamped between the gasket 130 and the nut 132, and the nut 132 is in threaded connection with the rod portion 111.

The stem sleeve 13 of the other of the at least two sets of valve assemblies 10 may be made of a rubber material.

The mounting portion 113 is provided with a mounting hole 117 along the radial direction S, the mounting hole 117 penetrates through the mounting portion 113, and the mounting hole 117 is used for mounting the elastic telescopic structure 14.

Referring to fig. 6, the elastically telescopic structure 14 can elastically telescope relative to the mounting portion 113 along the radial direction S, and the elastically telescopic structure 14 includes a bushing 140, a pin 141, and a first elastic element 142. The whole bush 140 is the tube-shape, bush 140 cover is established in mounting hole 117, bush 140 has inner chamber 1400, inner chamber 1400 is followed radial S sets up, inner chamber 1400 is in be equipped with two relative openings on bush 140, inner chamber 1400 all reduces the setting at its two openings department. The number of the pins 141 is two, each of the pins 141 is sleeved in the cavity 1400, and each of the pins 141 is movable along the cavity 1400 such that each of the pins 141 can extend out of or retract into a corresponding opening of the cavity 1400. The first elastic member 142 abuts against between the two pins 141, the first elastic member 142 is used for providing a first elastic force for extending the pins 141 out of the inner cavity 1400, the first elastic member 142 is a first compression spring, and according to actual conditions, the first elastic member 142 may also be an elastic sheet, an elastic rubber ball, or the like.

It is understood that, as the case may be, the bushing 140 may be omitted, i.e., the pin 141 may be directly fitted into the mounting hole 117.

Referring also to fig. 7, the sensor assembly 20 includes a base 21 and a mounting block 22 coupled to the base 21.

The base 21 can be made of plastic materials, and a cavity is arranged in the base 21. And the circuit board 23, the battery 24, the antenna 25 and other components are arranged in the cavity. The circuit board 23 carries various chips, such as a pressure detection chip provided with an air pressure detection hole 230 for detecting air pressure in the air pressure detection hole 230, and a wireless transmission chip for wirelessly connecting with a tire pressure monitoring terminal located at an automobile instrument panel through an antenna 25. The battery 24 may be a button battery, the battery 24 is connected to the circuit board 23 by soldering, and the battery 24 is used for supplying power to the circuit board 23. The antenna 25 may be a radio frequency antenna, the antenna 25 is connected to the circuit board 23 by soldering, and the antenna 25, the battery 24 and the circuit board 23 form a transmitting board.

Referring to fig. 8 to 10, the base 21 includes a bottom 210 and an upper shell 211, and the upper shell 211 is connected to the bottom 210 and forms the cavity.

The bottom shell 210 may be made of a light-transmitting material, and a surface of the bottom shell 210 facing away from the upper shell 211 is used for being attached to a rim of the tire.

The upper shell 211 can be made of dark opaque material, the surface of the upper shell 211 facing away from the shell bottom 210 is provided with an air hole 2110, the air hole 2110 aligns with the air pressure detection hole 230 of the air pressure detection chip, and the air hole 2110 and the air pressure detection hole 230 are sealed through a sealing gasket.

In this embodiment, the upper case 211 and the case bottom 210 are connected by laser welding.

In some other embodiments, the upper shell 211 is connected to the shell bottom 210 by glue filling.

It is worth mentioning that, compared with the way of glue filling between the upper shell 211 and the shell bottom 210, the way of laser welding between the upper shell 211 and the shell bottom 210 can make the air tightness of the cavity good, and in addition, the assembly efficiency of the upper shell 211 and the shell bottom 210 is high, and the damage of glue to human body and the pollution to environment are reduced.

The mounting table 22 is arranged on one surface of the upper shell 211, which is far away from the shell bottom 210, and the maximum distance from the shell bottom 210 to the mounting table 22 is not more than a preset distance, so that the sensor assembly 20 can be well attached to a rim of a tire, and the sensor assembly 20 is prevented from being suspended when being mounted on and dismounted from the tire, and the sensor assembly 20 is not easy to damage.

The mounting table 22 is used for mounting the valve assembly 10, and the mounting table 22 includes a bracket 220, a pressing member 221, and a second elastic member 222.

The bracket 220 is used for mounting the valve assembly 10, and the bracket 220 includes a bracket main body 223 and a latch structure 224 mounted on the bracket main body 223.

The bracket main body 223 is connected to the upper case 211, the bracket main body 223 includes a first surface 2230 and a second surface 2231, the first surface 2230 is vertical with respect to the case bottom 210, and the second surface 2231 faces away from the case bottom 210, where the position of the first surface 2230 and the position of the second surface 2231 may be any according to practical situations, for example, the first surface 2230 is opposite to the second surface 2231, and is not limited in this embodiment.

The first surface 2230 is provided with a groove 2232, the groove 2232 is arranged along the axial direction O, and the mounting portion 113 of the valve stem 11 is fitted with the groove 2232. The mounting portion 113 of the valve stem 11 is insertable into the groove 2232 in the axial direction O, and the ventilation portion 112 is located outside the groove 2232, i.e., the second ventilation hole 115 is located outside the groove 2232.

The groove wall of the groove 2232 has two opposite clamping surfaces 2233, the clamping surfaces 2233 are parallel to the axial direction O, and the clamping surfaces 2233 are provided with mounting openings 2234 and guide grooves 2235.

The guide groove 2235 is located between the first surface 2230 and the mounting opening 2234, and when the mounting portion 113 of the valve stem 11 is inserted into the groove 2232 in the axial direction O, the pintle 141 abuts against the guide groove 2235, and the pintle 141 moves along the guide groove 2235, so that the guide groove 2235 guides the pintle 141 into the mounting opening 2234.

The guide slot 2235 is separated from the mounting opening 2234, and when the pin 141 moves to the end of the guide slot 2235 near the mounting opening 2234, the pin 141 can be retracted into the opening of the bushing 140 such that the pin 141 abuts the clamping surface 2233 and slides along the clamping surface 2233 into the mounting opening 2234.

The guide groove 2235 has a depth, in a direction along the axial direction S and from the first surface 2230 toward the mounting opening 2234, of the guide groove 2235 that gradually decreases such that the pin 141 can smoothly transition from abutting the guide groove 2235 to abutting the clamping surface 2233.

The second surface 2231 is provided with a pressing groove 2236, the pressing groove 2236 is located between the second surface 2231 and the groove 2232, and the pressing groove 2236 is a relatively flat square groove as a whole. Two insertion grooves 2237 are disposed on the bottom of the pressing groove 2236, the two insertion grooves 2237 are respectively located on two sides of the groove 2232, and each insertion groove 2237 is communicated with one corresponding mounting hole 2234.

It is understood that the number of the mounting holes 2234 corresponds to the number of the locking holes 2242, and the guide grooves 2235 are provided on the clamping surface 2233 where the mounting holes 2234 are provided, and the number of the guide grooves 2235 is not limited to two, as long as at least one, i.e., at least one of the clamping surfaces 2233 where the locking holes 2242 are provided, is provided with the guide groove 2235.

The lock catch structure 224 is generally U-shaped and can be made of metal material, for example, stainless steel sheet is made by a flanging process, and the lock catch structure 224 includes two lock pieces 2240 and a connecting piece 2241 connected between the two lock pieces 2240.

Each of the locking pieces 2240 is located in a corresponding one of the slots 2237, the edge of the locking piece 2240 is provided with a ratchet, and the edge of the locking piece 2240 is embedded in the wall of the slot 2237. The locking plate 2240 is provided with a locking hole 2242, the locking plate 2240 is opposite to the installation opening 2234, the locking hole 2242 is exposed out of the installation opening 2234, and the locking plate 2240 is flush with the clamping surface 2233. The pintle 141 slides into the mounting hole 2234, abuts against a locking plate 2240, and moves along the locking plate 2240 to the locking hole 2242, the pintle 141 is inserted into the locking hole 2242 and abuts against the locking hole 2242, so that the mounting portion 113 of the valve stem 11 cannot be pulled out of the groove 2232 along the axial direction O.

It is to be understood that, in the first aspect, the locking structure 224, the mounting opening 2234, the pressing groove 2236 and the insertion groove 2237 may be omitted, and the locking hole 2242 is directly disposed on the clamping surface 2233. In the second aspect, the number of the locking holes 2242 is not limited to two, and at least one of the two clamping surfaces 2233 may be provided with the locking hole 2242, and accordingly, the elastic expansion structure 14 may elastically expand and contract on one side of the mounting portion 113, and still the assembly of the valve assembly 10 and the sensor assembly 20 may be achieved. In a third aspect, the elastically-telescopic structure 14 is telescopic along the radial direction, the clamping surface 2233 is disposed parallel to the axial direction, the axial direction O and the radial direction S are only the best fixing manner, and of course, the telescopic direction of the elastically-telescopic structure 14 and the clamping surface 2233 form an included angle between 0 and 90 degrees.

Locking plate 2240 is provided with spacing portion 2243, spacing portion 2243 is located locking plate 2240 deviates from one side of recess 2232.

The connecting piece 2241 is attached to the bottom of the slot 2236.

The pressing member 221 has a U-shape as a whole, and may be made of a metal material, for example, a stainless steel sheet, and includes two moving plates 2210 and a pressing plate 2211 connected between the two moving plates 2210. Two locking pieces 2240 are located between the two moving plates 2210, and each moving plate 2210 abuts against one corresponding locking piece 2240, so that the moving plate 2210 can move along the locking pieces 2240, so that one end of the moving plate 2210 far away from the pressing plate 2211 can extrude the pin 141 out of the locking hole 2242, and the mounting portion 113 of the valve stem 11 can be taken out of the groove 2232 in the axial direction O.

A bending plate 2212 is arranged between the moving plate 2210 and the pressing plate 2211, one end of the bending plate 2212 is connected with the moving plate 2210, the other end of the bending plate 2212 is connected with the pressing plate 2211, the bending plate 2212 is bent into a U shape, so that two ends of the bending plate 2212 are opposite, two ends of the bending plate 2212 are located at two sides of the limiting part 2243, when the moving plate 2210 moves along the locking plate 2240, the limiting part 2243 can be respectively abutted against two ends of the bending plate 2212, so that the locking structure 224 and the pressing piece 221 cannot be relatively separated.

The end of the moving plate 2210 remote from the pressing plate 2211 is inclined in a direction away from the locking plate 2240, which facilitates the end of the moving plate 2210 remote from the pressing plate 2211 to push the pins 141 out of the locking holes 2242.

The pressing plate 2211 is opposite to the connecting piece 2241, and when the moving plate 2210 moves along the locking piece 2240, so that the end of the moving plate 2210 far from the pressing plate 2211 extrudes the pin 141 out of the locking hole 2242, the pressing plate 2211 approaches the connecting piece 2241. The plunger 141 can be pushed out of the locking hole 2242 by pressing the pressing plate 2211.

The second elastic member 222 is used to provide the pressing plate 2211 away from the connecting piece 2241. One end of the second elastic member 222 abuts against the pressing plate 2211, and the other end of the second elastic member 222 penetrates the connecting piece 2241 and is fitted into the bottom of the pressing groove 2236. The second elastic member 222 is a second compression spring, and according to actual conditions, the second elastic member 222 may also be replaced by a spring plate, an elastic rubber ball, or the like.

By providing the pressing member 221 and the second elastic member 222, the valve assembly 10 and the sensor assembly 20 can be easily detached, that is, by pressing the pressing plate 2211 of the pressing member 221, the moving plate 2211 of the pressing member 221 can extrude the pin 141 inserted into the locking hole 2242, so that the valve assembly 10 and the sensor assembly 20 can be detached from each other.

When the valve stem 11 is assembled to the sensor assembly 20, the following is detailed:

the mounting portion 113 of the valve stem 11 is inserted into the groove 2232 in the axial direction O so that the pin 141 opposes the locking hole 2242 and the pin 141 is inserted into the locking hole 2242, thereby completing the assembly of the valve stem 11 with the sensor assembly 20, wherein the pin 141 and the guide groove 2235 can be abutted by the pin 141, so that the guide groove 2235 guides the pin 141 to oppose the locking hole 2242, and so that the guide groove 2235 gradually decreases in depth in a direction from the first surface 2230 to the locking hole 2242 because the insertion direction of the valve stem 11 is in the axial direction O, thereby facilitating the pin 141 to be retracted into the bush 140 in the radial direction O.

When the valve stem 11 is detached from the sensor assembly 20, the following is detailed:

by pressing the pressing plate 2111 of the pressing member 211, the moving plate 2110 of the pressing member 211 moves relative to the locking tab 2240, so that the moving plate 2110 pushes the pin 141 inserted into the locking hole 2242 out of the locking hole 2242, and at this time, the valve stem 11 can be pulled out of the groove 2235 in the axial direction O, thereby completing the detachment of the valve stem 11 from the sensor assembly 20.

When the tire pressure sensor 100 is mounted on a rim of a tire, the following is specific:

the shell bottom 210 of the sensor assembly 20 is attached to a rim, and a prepared hole for the valve rod 11 to extend out is formed in the rim.

In one aspect, when one of the at least two valve assemblies 10 with different specifications is assembled, the sealing ring 130 is sleeved on the rod portion 111 of the valve stem 11, and the sealing ring 130 abuts against the ventilation portion 112 of the valve stem 11, the mouth portion 110 of the valve stem 11 is inserted into the preformed hole of the rim, and then the gasket 131 and the nut 133 are sequentially sleeved on the rod portion 111 of the valve stem 11, so that the gasket 131 and the sealing ring 130 clamp the rim, and the nut 133 is screwed with the rod portion 111 of the valve stem 11, so that the gasket 131 is clamped between the rim and the nut 133, in some embodiments provided by the present invention, as shown in fig. 11, the tire pressure sensor 100 further includes a metal rod 30, the metal rod 30 is used for being inserted into the second ventilation hole 115, because in the process of assembling and disassembling the nut 133 on the valve stem 11, the elastic expansion structure 14 is a connection structure between the valve stem 11 and the sensor assembly 20, and during screwing of the nut 133, a torque applied around the axial direction O acts on the elastic expansion structure 14, which easily causes damage to the elastic expansion structure 14, so that by inserting the metal rod 30 into the second vent hole 115 provided along the radial direction S, and during screwing of the nut 133, fixing the metal rod 30 by hand or the like, the metal rod 30 can be made to bear the torque applied when screwing the nut 133 instead of the elastic expansion structure 14, so that the elastic expansion structure 14 is not easily damaged.

On the other hand, when the other of the at least two valve assemblies 10 having different specifications is assembled, the stem sleeve 13 is directly fitted over the stem portion 111 of the valve stem 11, and the mouth portion 110 of the valve stem 11 is inserted into the rim.

Finally, the valve cover 12 is screwed to the mouth portion 110 of the valve stem 11.

When the tire pressure sensor 100 is used specifically, the following is specific:

air can be inflated into the tire through the first air hole 116.

The circuit board 23 in the sensor assembly 20 detects the air pressure in the tire, and communicates with the tire pressure monitoring terminal through the antenna 25 in the sensor assembly 20.

Compared with the prior art, the utility model provides an in the tire pressure sensor 100, elasticity extending structure 14 is after shortening, the installation department 113 of valve subassembly 10 can insert two between the clamping face 2233, the installation department 113 of valve subassembly 10 is located two when the clamping face 2233 is between, elasticity extending structure 14 can extend automatically and insert lockhole 2242 can realize valve subassembly 10 with sensor subassembly 20 is installed for conveniently to do not need extra instrument.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A tire pressure sensor (100), comprising:

the valve assembly (10) comprises a mounting portion (113), a rod portion (111), a rod sleeve (13) and an elastic telescopic structure (14), wherein the mounting portion (113) is connected with the rod portion (111), the rod sleeve (13) is sleeved on the rod portion (111), the elastic telescopic structure (14) is mounted on the mounting portion (113), and the elastic telescopic structure (14) can elastically stretch out and draw back on at least one side of the mounting portion (113);

the sensor assembly (20) is provided with two opposite clamping surfaces (2233), at least one of the two clamping surfaces (2233) is provided with a lock hole (2242), the mounting part (113) is located between the two clamping surfaces (2233), and the elastic telescopic structure (14) is inserted into the lock hole (2242);

the number of the valve assemblies (10) is at least two, any one of the at least two valve assemblies (10) is connected with the sensor assembly (20) in a replaceable mode, the rod sleeve (13) of one of the at least two valve assemblies (10) is made of a metal material, and the rod sleeve (13) of the other of the at least two valve assemblies (10) is made of a rubber material.

2. The tire pressure sensor (100) of claim 1, wherein the mounting portions (113) are in contact with the two clamping surfaces (2233), respectively.

3. The tire pressure sensor (100) of claim 1, wherein the valve assembly (10) includes a valve stem (11), the valve stem (11) including the mounting portion (113) and the stem portion (111);

the elastic telescopic structure (14) can be stretched along the radial direction (S) of the valve rod (11), and the clamping surface (2233) is parallel to the axial direction (O) of the valve rod (11).

4. The tire pressure sensor (100) of claim 3, wherein the sensor assembly (20) has a first surface (2230), the first surface (2230) being provided with a groove (2232), the groove (2232) having two of the clamping surfaces (2233);

the mounting portion (113) is inserted into the groove (2232).

5. The tire pressure sensor (100) of claim 4, wherein at least one of the clamping surfaces (2233) provided with the locking hole (2242) is provided with a guide groove (2235), the guide groove (2235) being interposed between the locking hole (2242) and the first surface (2230) in the axial direction (O).

6. The tire pressure sensor (100) of claim 5, wherein the depth of the guide groove (2235) gradually decreases in a direction from the first surface (2230) toward the locking hole (2242) along the axial direction (O).

7. The tire pressure sensor (100) according to any one of claims 4 to 6, wherein the mounting portion (113) is provided with a mounting hole (117) provided in the radial direction (S);

the elastic telescopic structure (14) is mounted on the mounting hole (117).

8. The tire pressure sensor (100) of claim 7, wherein the elastically stretchable structure (14) includes a pin (141) and a first elastic member (142);

the pin (141) is sleeved in the mounting hole (117), and the pin (141) can be retracted into or extended out of the mounting hole (117) along the radial direction (S);

the first elastic piece (142) is used for providing a first elastic force for extending the pin (141) out of the mounting hole (117).

9. The tire pressure sensor (100) according to claim 8, wherein both of the clamping surfaces (2233) are provided with the locking holes (2242), the mounting hole (117) is provided with two openings on the mounting portion (113), and the number of the studs (141) is two;

each of the pins (141) is extendable from or retractable into a corresponding opening of the mounting hole (117) in the radial direction (S).

10. The tire air pressure sensor (100) of claim 9, wherein the first elastic member (142) abuts between the two studs (141).

11. The tire pressure sensor (100) of claim 8, wherein the first resilient member (142) is a first compression spring.

12. The tire pressure sensor (100) of claim 8, wherein the elastically stretchable structure (14) further includes a bush (140) mounted to the mounting hole (117);

the bushing (140) has an inner cavity (1400) arranged along the radial direction (S), and the pin (141) is sleeved in the inner cavity (1400).

13. The tire pressure sensor (100) according to any one of claims 4 to 6, wherein the valve stem (11) further includes a vent portion (112) and a mouth portion (110), and the mounting portion (113), the vent portion (112), the stem portion (111), and the mouth portion (110) are arranged in the axial direction (O) in this order;

the valve rod (11) is provided with a first vent hole (114) and a second vent hole (115) which are communicated with each other, the opening of the first vent hole (114) is arranged on the mouth part (110), and the opening of the second vent hole (115) is arranged on the vent part (112);

the second venting hole (115) is located outside the groove (2232).

14. The tire pressure sensor (100) of claim 13, wherein the second vent hole (115) is disposed along the radial direction (S).

15. The tire pressure sensor (100) of claim 13, wherein the valve assembly (10) further comprises a valve cover (12);

the valve cover (12) is in threaded connection with the mouth part (110).

16. The tire pressure sensor (100) according to any one of claims 1 to 6, wherein the rod cover (13) made of metal includes a seal ring (130), a washer (131), and a nut (132);

the sealing ring (130), the gasket (131) and the nut (132) are sequentially sleeved on the rod part (111), the nut (132) is in threaded connection with the rod part (111), the gasket (131) is clamped between the nut (132) and the sealing ring (130), and the sealing ring (130) is clamped between the ventilation part (112) and the gasket (131).

17. The tire pressure sensor (100) of claim 16, wherein the tire pressure sensor (100) further comprises a metal rod (30), the metal rod (30) being configured to pass through the second vent hole (115).

18. The tire pressure sensor (100) of any of claims 4 to 6, wherein the sensor assembly (20) includes a base (21) and a bracket (220) connected to the base (21);

the base (21) is used for being attached to a rim, and a transmitting plate is arranged in the base (21);

the cradle (220) has the first surface (2230).

19. The tire pressure sensor (100) of claim 18, wherein the base (21) includes an upper shell (211) and a shell bottom (210);

the upper shell (211) is connected with the bracket (220), and the shell bottom (210) is used for fitting a wheel rim;

the upper shell (211) is connected with the shell bottom (210) through laser welding, and the upper shell (211) is connected with the shell bottom (210) to form a containing cavity for containing the emitting plate.

20. The tire pressure sensor (100) of claim 18, wherein the carrier (220) includes a carrier body (223) and a latch structure (224) coupled to the carrier body (223);

the holder body (223) is connected to the base (21), the holder body (223) having the first surface (2230);

the two clamping surfaces (2233) are provided with mounting ports (2234);

hasp structure (224) include locking plate (2240), two locking plate (2240) all is provided with lockhole (2242), every locking plate (2240) and a corresponding installing port (2234) are relative, and every lockhole (2242) appear in a corresponding installing port (2234).

21. The tire pressure sensor (100) of claim 20, wherein the carrier body (223) further has a second surface (2231), the second surface (2231) being provided with a pressing groove (2236), the pressing groove (2236) being located between the second surface (2231) and the groove (2232);

slots (2237) are formed in the bottom of the pressing slot (2236), two slots (2237) are located on two sides of the groove (2232), and each locking plate (2240) is located in one corresponding slot (2237);

hasp structure (224) still includes connection piece (2241), connection piece (2241) is connected in two between locking plate (2240), connection piece (2241) with the tank bottom of pressing groove (2236) contacts.

22. The tire pressure sensor (100) of claim 21, wherein the sensor assembly (20) further comprises a pressing piece (221) and a second elastic piece (222);

the pressing piece (221) comprises a moving plate (2210) and a pressing plate (2211), the pressing plate (2211) is connected between the two moving plates (2210), each moving plate (2210) is positioned in one corresponding slot (2237), and each moving plate (2210) abuts against one surface, away from the groove (2232), of one corresponding locking plate (2240);

the pressing plate (2211) is opposite to the connecting piece (2241), when the pressing plate (2211) moves towards the direction close to the connecting piece (2241), each moving plate (2210) moves along one corresponding locking piece (2240), so that each moving plate (2210) can extrude one corresponding elastic telescopic structure (14) from the lock hole;

the second elastic member (222) is used for providing a second elastic force for moving the pressing plate (2211) in a direction away from the connecting sheet (2241).

23. The tire pressure sensor (100) of claim 22, wherein the second elastic member (222) is a second compression spring.

24. The tire pressure sensor (100) of claim 22, wherein at least one of the two locking tabs (2240) is provided with a limiting portion (2243), the limiting portion (2243) being located on a side of the locking tab (2240) facing away from the groove (2232);

a bending plate (2212) is arranged between the moving plate (2210) and the pressing plate (2211), one end of the bending plate (2212) is connected with the moving plate (2210), the other end of the bending plate (2212) is connected with the pressing plate (2211), the bending plate (2212) is bent into a U shape, so that two ends of the bending plate (2212) are opposite, and the limiting part (2243) is positioned between two ends of the bending plate (2212);

when each moving plate (2210) moves along one corresponding locking piece (2240), the bending plate (2212) abuts against the limiting part (2243), so that the locking structure (224) and the pressing piece (221) cannot be separated relatively.