CN211869088U - Direct type tire pressure monitoring sensor and automobile tire - Google Patents

Abstract

The utility model discloses a direct tire pressure monitoring sensor and an automobile tire, which comprises a shell arranged in the tire, wherein a piston block, an upper air chamber and a lower air chamber are arranged in the shell; the upper air chamber is communicated with the interior of the tire, a communication circuit is arranged in the upper air chamber, the communication circuit comprises a piezoelectric sheet, and at least one electronic component forming the communication circuit is connected with the piston block; the piston block is capable of reciprocating between a conducting position and a breaking position to connect or disconnect the communication circuit; an elastic member is disposed in the lower air chamber, and is connected to the piston block and generates a force to move the piston block toward the conducting position. The tire pressure monitoring system can greatly reduce the production cost of the product on the basis of realizing all functions of the I-type TPMS tire pressure monitoring system specified by laws and regulations, does not need to replace batteries in the later period in the whole life cycle of the product, and saves the later maintenance cost.

Description

Direct type tire pressure monitoring sensor and automobile tire

Technical Field

The utility model relates to an automobile tire pressure monitoring technology field especially relates to a direct type tire pressure monitoring sensor and automobile tire.

Background

Most highway traffic accidents are caused by a flat tire. In the running process of an automobile, the low tire pressure of an automobile tire is one of main factors causing tire burst, so that the installation of a TPMS tire pressure monitoring system on the automobile tire is of great importance. Currently, TPMS tire pressure monitoring systems are divided into two categories: one is direct tire pressure monitoring, and the other is indirect tire pressure monitoring. The indirect tire pressure monitoring system does not need an additional hardware device, but a large amount of benchmarking tests are needed in development, the time consumption is long, and the reduced labor cost is huge; the direct tire pressure monitoring system has the advantages of short development period, capability of realizing timely alarm for each tire and the like, and is more and more widely applied.

Although the development cycle of the direct tire pressure monitoring device is short, the price is high, and the high price is the maximum resistance limiting the development of the direct tire pressure monitoring device. According to the analysis report of the TPMS chip industry in 2018, the cost of an SOC chip accounts for 40% -50% of that of a TPMS transmitting end, the cost of a lithium sub-battery accounts for about 10% -20%, the sum of the cost of the SOC chip and the cost of the lithium sub-battery accounts for more than half of the total cost, and if the SOC chip and the lithium sub-battery can be removed from a tire pressure monitoring system, the cost of the TPMS tire pressure monitoring system is reduced by more than half, and the cost advantage is huge.

SUMMERY OF THE UTILITY MODEL

The utility model provides a direct formula tire pressure monitoring sensor and automobile tire, it can realize the supply of product work electric power through the piezoelectric patches under the prerequisite that does not lose direct formula tire pressure sensor characteristics, reduces the manufacturing cost and the later maintenance cost of product by a wide margin.

The utility model adopts the technical proposal that:

a direct tire pressure monitoring sensor comprises a shell arranged in a tire, wherein a piston block is arranged in the shell, and an upper air chamber and a lower air chamber which are not communicated with each other are respectively formed on two sides of the piston block in the shell;

the upper air chamber is communicated with the interior of the tire, a communication circuit capable of transmitting communication signals is arranged in the upper air chamber, the communication circuit comprises a piezoelectric sheet, and at least one electronic component forming the communication circuit is connected with the piston block; the upper air chamber is internally provided with a conducting position and a breaking position, and the piston block can reciprocate between the conducting position and the breaking position to switch on or switch off a communication circuit;

an elastic member is disposed in the lower air chamber, and the elastic member is connected to the piston block and generates a force to the piston block to move toward the conducting position.

According to the technical scheme, when the air pressure in the upper air chamber is sufficient, the piston block can be kept at the open circuit position under the action of the air pressure in the upper air chamber and the elastic force of the elastic element, so that at least one electronic component is separated from the communication circuit, the communication circuit is cut off, and a communication signal cannot be sent out; when the air pressure in the upper air chamber is reduced, the elastic piece drives the piston block to move towards the conducting position, so that the electronic component connected with the piston block is connected into the communication circuit, the communication circuit is communicated, meanwhile, the motion of the piston block directly or indirectly extrudes the piezoelectric sheet, the piezoelectric sheet generates voltage to enable the communication circuit to be conducted, and the communication circuit sends out a communication signal to indicate the air pressure alarm in the tire. Electronic parts and piston piece synchronous motion through communication circuit realize the monitoring of the inside atmospheric pressure of tire, and the piezoelectric patches provides working power for communication circuit, has cancelled the design of SOC chip and lithium cell, has reduced the manufacturing cost of product, and simultaneously, the battery does not need the later stage to be changed in the whole life cycle of product, saves the maintenance cost in product later stage.

In one example, the communication circuit includes a control board capable of transmitting a communication signal, and a piezoelectric patch, at least one of the control board or the piezoelectric patch being coupled to the piston block; a conductive component capable of conducting the piezoelectric sheet and the control panel is arranged between the control panel and the piezoelectric sheet; when the piston block is positioned at the conduction position, the piezoelectric sheet is electrically connected with the conductive assembly, and the communication circuit is conducted; when the plunger block is in the open circuit position, the piezoelectric patch is isolated from the conductive assembly and the communication circuit is broken. The control panel or the piezoelectric plate is arranged on the piston block, so that the assembly of a product can be facilitated, and the communication circuit can be switched on at a switching-on position and switched off at a switching-off position.

In one example, the conductive assembly includes a first conductive sheet and a second conductive sheet electrically connected to the control board, the first conductive sheet being in continuous electrical connection with the piezoelectric sheet; when the piston block is positioned at the open circuit position, a tire pressure monitoring distance is arranged between the piezoelectric sheet and the second conducting sheet; when the piston block is at the conducting position, the piezoelectric sheet is electrically connected with the second conducting sheet. Through setting up first conducting strip and second conducting strip and making the second conducting strip be connected with the cooperation of piezoelectric patches, direct formula tire pressure monitoring sensor can send communication signal when the piston piece is located the position of switching on and stop sending communication signal when the piston piece is located the position of opening a circuit, and product simple structure easily realizes.

In one example, the first conductive sheet and the second conductive sheet are electrically connected to the positive electrode and the negative electrode of the control board respectively, and the first conductive sheet and the second conductive sheet are covered with injection molding colloid layers connected with the control board. Through setting up the colloid layer of moulding plastics, first conducting strip and second conducting strip can guarantee to keep being connected effectively with the control panel under the jolting environment that the vehicle went, and product simple structure easily realizes.

In one example, the first conductive sheet is provided with a flexibly deformable electrical connection section therein. Through the setting of the electric connection section, the first conducting strip can be electrically connected with the control panel in the reciprocating motion process of the piston block at the conduction position and the disconnection position, and the components cannot be damaged.

In one example, the control plate is positioned on top of the upper plenum when the piezoelectric patch is attached to the piston block, and the control plate is covered with an injected plastic layer that is attached to the upper plenum. Through setting up the colloid layer of moulding plastics, the control panel can guarantee to keep fixed with being connected of last air chamber under the jolting environment that the vehicle was gone, and product simple structure easily realizes.

In one example, a boss for fixing the elastic member is provided in the lower air chamber. Through setting up the boss, the elastic component can guarantee under the jolting environment that the vehicle travel, and its flexible direction can not produce the skew to guarantee the validity of piston block motion.

In one example, an air guide hole communicated with the interior of the tire is arranged on the upper air chamber; the air vent is in communication with the interior of the tire when the piston block is in the on position or the off position. Through the setting of air guide hole, go up the air chamber and can keep unanimous with the inside atmospheric pressure of tire all the time, product simple structure easily realizes.

In one example, a valve is attached to the housing and is provided with an air hole that communicates with the interior of the tire. Through the setting of inflating valve, the product can directly replace original inflating valve on the automobile tire, is convenient for the installation and use of product.

The utility model also provides an automobile tire, including above-mentioned arbitrary technical scheme's direct type tire pressure monitoring sensor.

By adopting the technical scheme, the method has the following beneficial effects:

the utility model provides a direct formula tire pressure monitoring sensor and automobile tire, compare with current direct formula tire pressure sensor, on the basis of the whole functions of I type TPMS tire pressure monitoring system who has realized the regulation, the design of SOC chip and lithium cell of current direct formula tire pressure sensor has been cancelled, the manufacturing cost of messenger's product is reduceed by a wide margin, and, the power supply design of product adopts piezoelectric material, do not need the later stage to change the battery in the whole life cycle of product, the later maintenance cost is saved, and simultaneously, through the boss, the colloid layer of moulding plastics, product internal design such as tire pressure monitoring interval, product simple structure is stable, can not take place the mistake report because of the annular of jolting of the vehicle in the driving process, the product uses more effectively stably.

Drawings

Fig. 1 is a schematic view of a direct tire pressure monitoring sensor in an open circuit position according to an embodiment of the present invention;

fig. 2 is the embodiment of the utility model provides an in the embodiment direct tire pressure monitoring sensor in the schematic diagram of switching on the position.

Description of reference numerals: 1-a shell; 2-a piston block; 3-upper air chamber; 4-lower air chamber; 5-a piezoelectric sheet; 6-compression spring; 7-a control panel; 8-a first conductive sheet; 9-a second conductive sheet; 10-tire pressure monitoring interval; 11-injection molding a colloid layer; 12-a boss; 13-gas-guide holes; 14-a valve; 15-air holes.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1-2, a direct tire pressure monitoring sensor according to an embodiment of the present invention includes a housing 1 disposed inside a tire, a piston block 2 is disposed inside the housing 1, an upper air chamber 3 and a lower air chamber 4 are formed inside the housing 1 on two sides of the piston block 2, wherein,

the upper air chamber 3 is communicated with the interior of the tire, a communication circuit capable of transmitting communication signals is arranged in the upper air chamber 3, the communication circuit is formed by electrically connecting a plurality of electronic components, and at least one electronic component is a piezoelectric sheet 5; at the same time, at least one electronic component constituting a communication circuit is connected to the piston block 2; the upper air chamber 3 is provided with a conducting position and a breaking position, and the piston block 2 can reciprocate between the conducting position and the breaking position to connect or disconnect a communication circuit;

a compression spring 6 is provided as an elastic member in the lower air chamber 4, one end of the compression spring 6 is connected to the piston block 2, and the other end is connected to the inside of the housing 1, and the compression spring 6 generates a force to move toward the conducting position toward the piston block 2 in its own expansion and contraction direction.

When the air pressure in the upper air chamber 3 is sufficient, the piston block 2 is kept to be not moved at the open circuit position under the action of the air pressure in the upper air chamber 3 and the elastic force of the compression spring 6, at this time, the electronic component connected with the piston block 2 is not connected into the communication circuit, at least one electronic component is far away from other electronic components of the communication circuit, the communication circuit is cut off, a communication signal cannot be sent, and the direct type tire pressure monitoring sensor does not give an alarm;

after the air pressure in the upper air chamber 3 is reduced, the elastic force applied to the piston block 2 by the compression spring 6 is larger than the pressure applied to the piston block 2 by the air pressure of the upper air chamber 3, so that the piston block 2 moves towards the conduction position along the extension direction of the compression spring 6, the electronic component connected with the piston block 2 is connected into the communication circuit, the communication circuit is communicated, meanwhile, the electronic component synchronously moving with the piston block 2 directly or indirectly presses the piezoelectric sheet 5, the piezoelectric sheet 5 generates voltage to conduct the communication circuit, and the communication circuit sends out a communication signal to indicate the air pressure alarm in the tire.

The direct tire pressure monitoring sensor can realize the monitoring of the internal air pressure of the tire by the synchronous movement of the electronic components of the communication circuit and the piston block 2; utilize piezoelectric patches 5 to provide working power for communication circuit, this direct type tire pressure monitoring sensor has cancelled the design of SOC chip and lithium cell, has reduced the manufacturing cost of product, simultaneously, does not need the later stage to change the battery in the whole life cycle of product, saves the maintenance cost in product later stage.

In one embodiment, the communication circuit includes a control board 7 capable of transmitting communication signals, and a piezoelectric patch 5, the piezoelectric patch 5 being connected to the piston block 2; the control board 7 can be a PCB board with an integrated circuit, and a conductive component capable of conducting the piezoelectric sheet 5 and the control board 7 is arranged between the control board 7 and the piezoelectric sheet 5; when the piston block 2 is positioned at the conduction position, the piezoelectric sheet 5 is electrically connected with the conductive component, and the communication circuit is conducted; when the piston block 2 is in the open circuit position, the piezoelectric patch 5 is isolated from the conductive assembly and the communication circuit is broken. The piezoelectric sheet 5 is arranged on the piston block 2, so that the assembly of a product can be facilitated, and the communication circuit can be switched on at a switching-on position and switched off at a switching-off position. This is also achieved by providing the control plate 7 or conductive assembly on the piston block 2 which moves synchronously with the piston block 2, in addition to the piezo-electric strip 5 on the piston block 2 which moves synchronously with the piston block 2.

In one embodiment, the conductive assembly comprises a first conductive sheet 8 and a second conductive sheet 9 electrically connected with the control board 7, the first conductive sheet 8 and the second conductive sheet 9 are arranged to extend along the inside of the housing 1, and the first conductive sheet 8 is continuously electrically connected with the piezoelectric sheet 5; when the piston block 2 is located at the open circuit position, a tire pressure monitoring distance 10 is arranged between the piezoelectric sheet 5 and the second conducting sheet 9, so that the piezoelectric sheet 5 is not in contact with the second conducting sheet 9; the piezoelectric patch 5 is electrically connected to the second conductive patch 9 when the plunger block 2 is in the conducting position. Through setting up first conducting strip 8 and second conducting strip 9 and making second conducting strip 9 be connected with the cooperation of piezoelectric patch 5, direct formula tire pressure monitoring sensor can send communication signal when piston block 2 is located the position of switching on and stop sending communication signal when piston block 2 is located the position of opening a circuit, and product simple structure easily realizes.

In one embodiment, the first conductive sheet 8 and the second conductive sheet 9 are electrically connected to the positive electrode and the negative electrode of the control board 7, respectively, and the first conductive sheet 8 and the second conductive sheet 9 are covered with an injection-molded plastic layer (not shown) connected to the control board 7. Through setting up the colloid layer of moulding plastics, first conducting strip 8 and second conducting strip 9 can guarantee to keep being connected effectively with control panel 7 under the jolting environment that the vehicle was gone, and product simple structure easily realizes.

In one embodiment, the first conductive sheet 8 is provided with a flexibly deformable electrical connection section (not shown). By the arrangement of the electric connection section, the first conducting strip 8 can be electrically connected with the control board 7 in the reciprocating process of the piston block 2 at the conducting position and the breaking position, and the components can not be damaged.

In one embodiment, the control plate 7 is placed on top of the upper air chamber 3 when the piezoelectric patch 5 is attached to the piston block 2, and the control plate 7 is covered with an injection molded gel layer 11 that is attached to the upper air chamber 3. Through setting up the colloid layer 11 of moulding plastics, control panel 7 can guarantee to keep fixed with being connected of last plenum 3 under the jolting environment that the vehicle went, and product simple structure easily realizes.

In one embodiment, a boss 12 for fixing the elastic member is provided in the lower air chamber 4. By providing the boss 12, the elastic member can ensure that the expansion direction of the elastic member does not deviate under the bumpy environment of vehicle running, thereby ensuring the effectiveness of the movement of the piston block 2.

In one embodiment, the upper air chamber 3 is provided with an air guide hole 13 communicated with the inside of the tire; the air vent hole 13 is in communication with the tire interior when the piston block 2 is in the on position or the off position. Through the setting of air guide hole 13, go up air chamber 3 and can keep unanimous with the inside atmospheric pressure of tire all the time, product simple structure easily realizes.

In one embodiment, a valve 14 is connected to the housing 1, and the valve 14 is provided with an air hole 15 communicating with the inside of the tire. Through the arrangement of the inflating valve 14, the product can directly replace the original inflating valve 14 on the automobile tire, and the product is convenient to install and use.

The embodiment of the utility model provides a still provide an automobile tire, direct tire pressure monitoring sensor including any one of the above-mentioned embodiments.

To sum up, the utility model provides a direct tire pressure monitoring sensor and automobile tire, compare with current direct tire pressure sensor, on the basis of the whole functions of I type TPMS tire pressure monitoring system who has realized the rule regulation, the SOC chip of current direct tire pressure sensor and the design of lithium cell have been cancelled, make the manufacturing cost of product reduce by a wide margin, and, piezoelectric material is adopted in the power supply design of product, do not need the later stage to change the battery in the whole life cycle of product, the later maintenance cost is saved, and simultaneously, through boss 12, injection molding colloid layer 11, product internal design such as tire pressure monitoring interval 10, product simple structure is stable, can not take place the false positive because of the annular of jolting of the vehicle in the driving process, the product is used more effectively stably.

According to the needs, the above technical schemes can be combined to achieve the best technical effect.

What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.

Claims (10)

1. A direct tire pressure monitoring sensor is characterized by comprising a shell arranged in a tire, wherein a piston block is arranged in the shell, and an upper air chamber and a lower air chamber which are not communicated with each other are respectively formed in the shell on two sides of the piston block;

the upper air chamber is communicated with the interior of the tire, a communication circuit capable of transmitting communication signals is arranged in the upper air chamber, the communication circuit comprises a piezoelectric sheet, and at least one electronic component forming the communication circuit is connected with the piston block; the upper air chamber is internally provided with a conducting position and a breaking position, and the piston block can reciprocate between the conducting position and the breaking position to switch on or switch off a communication circuit;

an elastic member is arranged in the lower air chamber, and the elastic member is connected with the piston block and generates a force moving towards the conduction position to the piston block.

2. The direct tire pressure monitoring sensor of claim 1 wherein the communication circuit includes a control board capable of transmitting a communication signal, and a piezoelectric patch, at least one of the control board or the piezoelectric patch being connected to the piston block; a conductive component capable of conducting the piezoelectric sheet and the control panel is arranged between the control panel and the piezoelectric sheet; when the piston block is located at the conduction position, the piezoelectric sheet is electrically connected with the conductive assembly, and the communication circuit is conducted; when the piston block is in the open circuit position, the piezoelectric patch is isolated from the conductive assembly and the communication circuit is broken.

3. The direct tire pressure monitoring sensor of claim 2, wherein the conductive assembly includes a first conductive strip and a second conductive strip electrically connected to a control board, the first conductive strip being in continuous electrical connection with the piezoelectric strip; when the piston block is positioned at the open circuit position, a tire pressure monitoring interval is arranged between the piezoelectric sheet and the second conducting sheet; when the piston block is located at the conduction position, the piezoelectric sheet is electrically connected with the second conducting sheet.

4. The direct tire pressure monitoring sensor according to claim 3, wherein the first conductive sheet and the second conductive sheet are electrically connected to the positive electrode and the negative electrode of the control board, respectively, and the first conductive sheet and the second conductive sheet are covered with an injection molding colloid layer connected to the control board.

5. The direct tire pressure monitoring sensor of claim 3, wherein the first conductive sheet has a flexibly deformable electrical connection section disposed therein.

6. The direct tire pressure monitoring sensor of claim 2, wherein the control board is disposed on top of the upper air chamber when the piezoelectric patch is connected to the piston block, and the control board is covered with an injection molded rubber layer connected to the upper air chamber.

7. The direct tire pressure monitoring sensor of claim 1, wherein a boss for securing an elastic member is provided in the lower air chamber.

8. The direct tire pressure monitoring sensor according to claim 1, wherein the upper air chamber is provided with an air guide hole communicated with the inside of the tire; when the piston block is positioned at the conducting position or the breaking position, the air guide hole is communicated with the interior of the tire.

9. The direct tire pressure monitoring sensor of claim 1, wherein an air valve is connected to the housing, and an air hole communicating with the inside of the tire is formed in the air valve.

10. An automobile tire comprising the direct tire pressure monitoring sensor according to any one of claims 1 to 9.

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