CN113479021A - Lightweight tire pressure monitoring sensor - Google Patents
Lightweight tire pressure monitoring sensor Download PDFInfo
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- CN113479021A CN113479021A CN202110741446.XA CN202110741446A CN113479021A CN 113479021 A CN113479021 A CN 113479021A CN 202110741446 A CN202110741446 A CN 202110741446A CN 113479021 A CN113479021 A CN 113479021A
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- China
- Prior art keywords
- tire pressure
- pressure monitoring
- shell
- circuit board
- housing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/041—Means for supplying power to the signal- transmitting means on the wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0418—Sharing hardware components like housing, antenna, receiver or signal transmission line with other vehicle systems like keyless entry or brake control units
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a light tire pressure monitoring sensor, which comprises: the shell is of a hollow structure without a cover, and the front end of the shell is provided with a through hole; the shell cover is arranged at the top of the shell and forms a closed cavity with the shell cover; the tire pressure monitoring module comprises a circuit board, a tire pressure monitoring chip and a wireless transmission module, wherein the circuit board is in matched insertion connection with the inner side wall of the shell through a mortise and tenon structure; the sealing device is communicated with the detection hole of the tire pressure monitoring chip and the through hole on the shell; and the power supply is fixed between the shell and the shell cover and is electrically connected with the circuit board through a conductive plate. According to the invention, the tire pressure monitoring module and the power supply are arranged in the same closed cavity through the mortise and tenon structure, and the tire pressure monitoring module is electrified through the conducting plate, so that the arrangement of internal elements of the sensor is compact, the connection among all the components is stable and reliable, and the integral volume and weight of the sensor are effectively reduced.
Description
Technical Field
The invention relates to the technical field of automobile tire pressure detection. More particularly, the present invention relates to a lightweight tire pressure monitoring sensor.
Background
With the continuous development and innovation of automobile technology, the requirements on driving safety are higher and higher. In the running process of a vehicle, tire pressure monitoring is an important safety means, various conditions of the tire are automatically monitored in real time by recording the rotating speed of the tire or an electronic sensor arranged in the tire, and effective safety guarantee can be provided for the running. In a common tire pressure monitoring sensor, a built-in power supply is generally adopted to supply power for a monitoring device independently, for ensuring the working stability, the inner cavity of the sensor is generally divided into two closed cavities which are not communicated with each other, and a monitoring module and a power supply for supplying power are respectively arranged in the monitoring module, the connection mode is favorable for providing a proper working environment for an electronic device, but the power supply needs to penetrate through the closed cavities when being electrically connected with the monitoring module, the positioning is difficult, the connection is unstable and other problems exist, the power supply and the monitoring module are arranged in a separated mode, the working space required by the whole sensor is increased, the size and the weight of the sensor are increased, the installation of the built-in tire pressure monitoring sensor is not convenient, and the working performance of a tire is influenced.
In order to solve the above problems, it is desirable to provide a lightweight tire pressure monitoring sensor, which reduces the volume and weight of the tire pressure monitoring sensor while ensuring the working stability of the tire pressure monitoring sensor, thereby better matching a built-in tire pressure monitoring system.
Disclosure of Invention
The invention aims to provide a light tire pressure monitoring sensor, wherein a tire pressure monitoring module and a power supply are arranged in the same closed cavity through a mortise and tenon structure, and the tire pressure monitoring module is electrified through a current conducting plate, so that the internal elements of the sensor are compactly arranged, and all the components are connected in a structure matching manner, so that the connection among the components is more stable and reliable, and the integral volume and weight of the sensor are effectively reduced.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a lightweight tire pressure monitoring sensor including:
the shell is of a hollow structure without a cover, and the front end of the shell is provided with a through hole;
the shell cover is arranged at the top of the shell and forms a closed cavity with the shell cover;
the tire pressure monitoring module is arranged in the shell and comprises a circuit board which is in matched insertion with the inner side wall of the shell through a mortise and tenon structure; the tire pressure monitoring chip and the wireless transmission module are arranged on the circuit board at intervals and are electrically connected with the circuit board, and the detection hole of the tire pressure monitoring chip is arranged right opposite to the through hole;
the sealing device is arranged between the detection hole and the through hole and is communicated with the detection hole and the through hole, and the sealing device, the detection hole and the through hole jointly form a cavity communicated with an air cavity of the tire;
the power supply is located at the rear end of the tire pressure monitoring module and fixed between the inner bottom surface of the shell and the shell cover, and the power supply is electrically connected with the circuit board through a conductive plate.
Preferably, the mortise and tenon structure of the lightweight tire pressure monitoring sensor comprises two first mortises which are oppositely arranged on the inner side walls of the two sides of the shell, and any one of the first mortises is arranged along the height direction of the shell and is communicated with the upper surface of the shell; the two first tenons are respectively arranged on two sides of the board body of the circuit board and are in joggle joint with the two first mortises; the two second mortises are oppositely arranged on the inner bottom surface of the shell and the inner top surface of the shell cover; and the two second tenons are respectively arranged at two ends of the board body of the circuit board and are in joggle joint with the two second mortises.
Preferably, in the lightweight tire pressure monitoring sensor, the conductive plate includes a first conductive plate and a second conductive plate, which are respectively and fixedly arranged in the housing, two ends of the first conductive plate are respectively connected to the circuit board and a positive electrode of the power supply, and two ends of the second conductive plate are respectively connected to the circuit board and a negative electrode of the power supply; the first conductive plate and the second conductive plate press the power supply from a front end and a rear end of the power supply toward each other, respectively.
Preferably, the inner side walls of the two sides of the shell of the light tire pressure monitoring sensor are provided with slots communicated with the corresponding first mortises; the positive electrode and the negative electrode of the circuit board are respectively located on the end faces of the two first tenons and are arranged right opposite to the slots on the same side, one end of the first conductive plate extends into the slot on one side and is abutted to the positive electrode on the end face of the first tenon, and one end of the second conductive plate extends into the slot on the other side and is abutted to the negative electrode on the end face of the first tenon.
Preferably, the light tire pressure monitoring sensor, the positive electrode and the negative electrode of the circuit board each include a plurality of electrodes arranged at intervals in a height direction of the housing.
Preferably, the light tire pressure monitoring sensor is characterized in that three-proofing paint is sprayed on the front surface and the rear surface of the plate body of the circuit board.
Preferably, the housing of the lightweight tire pressure monitoring sensor is located inside an air cavity of a tire and fixed on a wheel hub through a mounting device, the mounting device comprises a fixing plate fixed on an outer wall of the housing and extending outwards, and a mounting hole is formed in the middle of the fixing plate; and the stiffening plate is arranged on the fixing plate and is connected with the fixing plate and the outer wall of the shell.
Preferably, the light tire pressure monitoring sensor further comprises a sealing ring, the sealing ring is located between the housing and the housing cover and is arranged in an annular groove on the lower surface of the housing cover along the circumferential direction of the housing cover, and the cross-sectional diameter of the sealing ring is larger than the depth of the annular groove.
The invention at least comprises the following beneficial effects:
1. according to the invention, all the components are connected in a structure matching manner, the tire pressure monitoring module is respectively connected with the shell and the shell cover in a positioning manner from multiple directions through a mortise-tenon structure, the power supply is fixed between the shell and the shell cover through the limiting groove, the current conducting plate is clamped in the slots at two sides of the shell, on one hand, the current is conducted from the power supply to the tire pressure monitoring module, on the other hand, the power supply is pressed from two ends to the middle part, the power supply stability is ensured, all the elements in the sensor are compactly arranged, fastening modes such as bolts and glue coating are avoided, the connection among all the components is more stable and reliable, and meanwhile, the whole volume and weight of the sensor are effectively reduced;
2. according to the invention, the through hole corresponding to the detection hole in the tire pressure monitoring module is arranged on the shell, and the sealing device is arranged between the through hole and the detection hole, so that the part in the shell except the detection hole can form a complete sealing structure, the stability of the working environment of an electronic device in the shell is favorably maintained, the integral durability of the sensor is improved, and the service life of the sensor is prolonged.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic plan view of a lightweight tire pressure monitoring sensor according to an embodiment of the present invention in an uncovered state;
fig. 2 is a schematic elevation structure view of the lightweight tire pressure monitoring sensor in the above embodiment;
FIG. 3 is a sectional view of the lightweight tire pressure monitoring sensor taken along the line A-A in the above embodiment;
FIG. 4 is a B-B elevation cross-sectional view of the lightweight tire pressure monitoring sensor of the above-described embodiment;
fig. 5 is a schematic side elevation structure diagram of the circuit board in the above embodiment.
Description of reference numerals:
1. a housing; 11. a first slot; 12. a second slot; 13. a through hole; 14. a limiting groove; 2. a shell cover; 3. a circuit board; 31. a plate body; 32. a first tenon; 33. a second tenon; 34. an electrode; 4. a tire pressure monitoring chip; 41. a detection hole; 42. a sealing device; 5. a wireless transmission module; 6. a power source; 7. a first conductive plate; 8. a second conductive plate; 91. a fixing plate; 92. mounting holes; 93. and (4) a stiffening plate.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 5, the present invention provides a lightweight tire pressure monitoring sensor, including:
the shell 1 is of a uncovered hollow structure, and a through hole 13 is formed in the front end of the shell 1;
the shell cover 2 is arranged at the top of the shell 1 and forms a closed cavity with the shell cover;
the tire pressure monitoring module is arranged inside the shell 1, comprises a circuit board 3 and is in matched insertion connection with the inner side wall of the shell 1 through a mortise and tenon structure; the tire pressure monitoring chip 4 and the wireless transmission module 5 are arranged on the circuit board 3 at intervals and electrically connected with the circuit board, and the detection hole 41 of the tire pressure monitoring chip 4 is arranged right opposite to the through hole 13;
the sealing device 42 is arranged between the detection hole 41 and the through hole 13 and is communicated with the detection hole and the through hole 13, and the sealing device 42, the detection hole 41 and the through hole 13 together form a cavity communicated with an air cavity of the tire;
and the power supply 6 is positioned at the rear end of the tire pressure monitoring module and fixed between the inner bottom surface of the shell 1 and the shell cover 2, and the power supply 6 is electrically connected with the circuit board 3 through a conductive plate.
Among the above-mentioned technical scheme, cap 2 installs at the top of casing 1 and covers its upper surface, and cap 2 laminates each other in order to guarantee the leakproofness of airtight cavity with the face of being connected of casing 1, and cap 2 can be through pressing mode such as joining in marriage, rubber coating and casing 1 fixed connection. Sealing device 42 chooses cylindrical seal piece for use, its inside is equipped with the perforation that equals the footpath with through-hole 13 along the axial, the perforation is with the through-hole 13 and the inspection hole 41 intercommunication at both ends, inspection hole 41, the perforation, through-hole 13 forms the independent cavity of keeping apart and the inside intercommunication of the air cavity with the tire with casing 1 inner chamber, thereby, the clearance of inspection hole 41 with casing 1 inner chamber has been sealed through sealing device 42, prevent inside the gas entering casing 1 of the air intracavity of tire in the tire pressure testing process, influence the normal work of other electron device and power 6 on the tire pressure testing module. Sealing device 42 pressure equipment is between tire pressure monitoring chip 4 and casing 1 inner wall, can set up the mounting groove in casing 1 inner wall near the position of through-hole 13, conveniently fixes a position and installs sealing device 42, for preventing to damage tire pressure monitoring chip 4, sealing device 42 also can choose for use the elastic material preparation, its and tire pressure monitoring chip 4 and the clearance interference fit that forms between the casing 1 inner wall. The inner bottom surface of the shell 1 and the inner top surface of the shell cover 2 are relatively provided with limiting grooves 14, the power supply 6 is clamped between the inner bottom surface of the shell 1 and the inner top surface of the shell cover 2 through the upper limiting groove 14 and the lower limiting groove 14, the power supply 6 is preferably a button battery, the size of the power supply 6 is smaller, the power supply is similar to the shape structure (the diameter is larger and the thickness is thinner) of the circuit board 3, the power supply can be conveniently arranged in the shell 1 at intervals with the circuit board 3, the plane where the diameter of the button battery is located is parallel to the plane where the board surface of the circuit board 3 is located, and the plane is adjacent to the back surface (the surface without the tire pressure monitoring chip 4) of the circuit board 3; therefore, the button cell and the circuit board can be arranged close to each other as much as possible under the condition of not influencing each other, so that all parts in the shell 1 are compactly arranged, and the reduction of the volume and the weight of the shell is facilitated. The tire pressure monitoring chip on the circuit board can be made of Yingfei SP40, and the size is small, so that the tire pressure monitoring chip is convenient to mount on the circuit board; the wireless transmission module can be APC240B, the transmitting terminal is arranged on the circuit board and used for wirelessly transmitting an electric signal to the receiving terminal after obtaining the tire pressure monitoring result and outputting the tire pressure monitoring result, and the receiving terminal of the wireless transmission module is integrated in a control system in the vehicle.
The tire pressure monitoring device realizes the positioning and installation of the shell, the tire pressure monitoring module and the power supply through the matching connection of various structures, the tire pressure monitoring module is respectively connected with the shell and the shell cover in a positioning way from multiple directions through a tenon-and-mortise structure, the power supply is fixed between the shell 1 and the shell cover 2 through the limiting groove 14, the current conducting plate conducts electricity to the tire pressure monitoring module from the power supply, the power supply stability is ensured, the arrangement of all elements in the sensor is compact, the fastening modes such as bolts and glue coating are avoided, the connection among all parts is more stable and reliable, and the integral volume and the weight of the sensor are effectively reduced; in addition, the through hole 13 corresponding to the detection hole 41 in the tire pressure monitoring module is arranged on the shell 1, and the sealing device 42 is arranged between the through hole 13 and the detection hole 41, so that the parts except the detection hole 41 in the shell 1 can form a complete sealing structure, the stability of the working environment of electronic devices in the shell is favorably maintained, and the integral durability and the service life of the sensor are improved.
In another technical scheme, the mortise and tenon structure of the lightweight tire pressure monitoring sensor comprises two first mortises which are oppositely arranged on the inner side walls of the two sides of the shell 1, and any one of the first mortises is arranged along the height direction of the shell 1 and is communicated with the upper surface of the shell 1; two first tenons 32 respectively arranged at two sides of the board body 31 of the circuit board 3 and joggled with the two first mortises; the two second mortises are oppositely arranged on the inner bottom surface of the shell 1 and the inner top surface of the shell cover 2; and two second tenons 33 respectively disposed at both ends of the plate body 31 of the circuit board 3 and joggled with the two second mortises. Specifically, the vertical setting of the direction of height of casing 1 is followed to first tongue-and-groove, the horizontal cross-section of first tongue-and-groove is trapezium structure, wherein shorter parallel edge is located the opening part of first tongue-and-groove, first tenon 32's size, the shape all cooperatees with first tongue-and-groove, the vertical setting of plate body 31 of circuit board 3, two faces of circuit board 3 are just respectively preceding to casing 1 promptly, the lateral wall setting of back end, the length of plate body 31 is the length of airtight cavity promptly, the width (height) of plate body 31 is the length (height) of first tenon 32 promptly, the height that highly equals first tongue-and-groove of first tenon 32 equals the height of airtight cavity. The bottom surface is equipped with the second tongue-and-groove respectively in casing 1 and the cap 2 on the top surface, it is corresponding with the design mounted position of circuit board 3, the vertical setting of plate body 31 of circuit board 3, both ends (being the both ends of the width direction of face) are outside extension respectively and are formed second tenon 33 about it, second tenon 33 is the trapezium structure on the plane at 3 faces of circuit board place, its shorter parallel limit is connected with plate body 31, longer parallel limit sets up outwards, second tenon 33 and second tongue-and-groove cooperation joggle, thereby further carry on spacingly to the position of circuit board 3 in airtight cavity, and prevent that the relative casing 1 of circuit board 3 from taking place the displacement in the work, avoid the detection hole 41 of child pressure monitoring chip on the circuit board 3 to take place the skew relative through-hole 13 on the casing 1, guarantee tire pressure monitoring's accuracy and stability.
In another technical solution, the light tire pressure monitoring sensor includes a first conductive plate 7 and a second conductive plate 8, which are respectively and fixedly disposed inside the housing 1, two ends of the first conductive plate 7 are respectively connected to the positive electrodes of the circuit board 3 and the power supply 6, and two ends of the second conductive plate 8 are respectively connected to the negative electrodes of the circuit board 3 and the power supply 6; the first conductive plate 7 and the second conductive plate 8 press the power source 6 from the front end and the rear end of the power source 6, respectively. Among the above-mentioned technical scheme, the current conducting plate is the structure of the type of falling L on the plane that hard material preparation formed, positive electrode or negative electrode fixed connection (welding or grafting) on its vertical portion and the circuit board 3, the horizontal part extends along casing 1's length direction, the horizontal part interval of first current conducting plate 7 and second current conducting plate 8 sets up and is parallel to each other, first current conducting plate 7 and second current conducting plate 8 set for interval less than or equal to button cell's thickness, thereby, button cell's positive pole is hugged closely to first current conducting plate 7 after the installation, button cell's negative pole is hugged closely to second current conducting plate 8, compress tightly button cell behind both the former, can further carry on spacingly to button cell, and guarantee that the electric conductive property of current conducting plate is good, connect reliable and stable.
In another technical scheme, in the light tire pressure monitoring sensor, the inner side walls of two sides of the shell 1 are provided with slots communicated with the corresponding first mortises; the positive electrode and the negative electrode of the circuit board 3 are respectively located on the end faces of the two first tenons 32 and are just opposite to the slots on the same side, one end of the first conducting plate 7 extends into the slot on one side and is abutted to the positive electrode on the end face of the first tenon 32, and one end of the second conducting plate 8 extends into the slot on the other side and is abutted to the negative electrode on the end face of the first tenon 32. Wherein, the slot sets up and communicates with the upper surface of casing 1 along casing 1's direction of height (vertical), the slot that corresponds with the positive electrode of circuit board 3 is first slot 11, the slot that corresponds with the negative electrode of circuit board 3 is second slot 12, first current conducting plate 7 and second current conducting plate 8 can be respectively from the vertical slot that downwards inserts the correspondence in casing 1 top, the opening of first slot 11 on casing 1 inside wall corresponds with the plane that the positive pole of power 6 was located, the opening of second slot 12 on casing 1 inside wall corresponds with the plane that power 6 negative pole was located, the shape phase-match of current conducting plate and the slot that corresponds, after inserting in the slot, the both ends of current conducting plate are automatic to be connected with the first tenon 32 that corresponds and the power 6 electrode location that corresponds. The slots assist in positioning the conductive plates in the housing 1 on the one hand and ensure that the conductive plates can be stably attached to the electrodes of the power supply 6 on the other hand. The height that highly equals the slot that corresponds of current conducting plate to, when cap 2 attaches together with casing 1, because the upper surface intercommunication of slot and casing 1, cap 2 can compress tightly the top that is located the current conducting plate of slot simultaneously, guarantees that the current conducting plate is stable in the inside location of sensor, can not take place relative displacement along with other structures in external vibration and the casing, ensures that the current conducting plate can be stable from the power electrode department to the electrode of circuit board electrically conductive. In addition, the positive pole and the negative pole of the circuit board 3 are respectively arranged on two sides, so that the mutual interference between the two conducting plates in the conductive connection can be prevented, and the normal work of the circuit board and the electronic device on the circuit board can be prevented from being influenced by the interference generated when the positive pole and the negative pole are too close to each other by separating the positive pole line and the negative pole line of the circuit board.
In another embodiment, the light tire pressure monitoring sensor, the positive electrode and the negative electrode of the circuit board 3 each include a plurality of electrodes 34 spaced apart along the height direction of the housing 1. Therefore, the plurality of electrodes 34 are contacted with the corresponding conductive plates on the end surface of the first tenon 32, so that the conductive reliability is improved, and the problem that the circuit board and the electronic devices on the circuit board cannot work normally when a single electrode fails is prevented.
In another technical solution, the light tire pressure monitoring sensor is formed by spraying three-proofing paint on the front surface and the rear surface of the plate body 31 of the circuit board 3. Wherein, because tire pressure monitoring module is located same sealed cavity with power 6, for reducing the influence of long-term work in the power 6 discharge to circuit board 3 itself and solder joint, spraying three proofings lacquer on the face around plate body 31 of circuit board 3 can guarantee its operational environment's relatively stable under the condition that circuit board and power are close to the setting, three proofings lacquer need be paid attention to when the spraying dodge wireless transmission module 5, tire pressure monitoring chip 4 etc. electronic component's surface.
In another technical solution, in the light tire pressure monitoring sensor, the housing 1 is located inside an air cavity of a tire and fixed on a wheel hub through a mounting device, the mounting device includes a fixing plate 91 fixed on an outer wall of the housing 1 and extending outward, and a mounting hole 92 is formed in the middle of the fixing plate 91; and a stiffening plate 93 disposed on the fixing plate 91 and connecting the fixing plate 91 and the outer wall of the housing 1. Specifically, the lightweight tire pressure monitoring sensor is a built-in tire pressure sensor, and the detection hole 41 on the tire pressure monitoring chip 4 is communicated with the air cavity of the tire through the through hole 13 on the shell 1, so that the real-time dynamic monitoring of the tire pressure is realized. The mounting device is used to fix the integral sensor to the hub, and in this embodiment, the fixing plate 91 may be fixedly connected to the surface of the hub through the mounting hole 92 by using a connector such as a connector or a bolt, so that the sensor may be conveniently detached from the hub when the sensor needs to be repaired or replaced. A stiffening plate 93 is further disposed between the fixing plate 91 and the outer wall of the housing 1 to improve the connection stability between the housing and the hub, and to prevent the sensor from shaking or falling off during the driving of the vehicle.
In another technical solution, the lightweight tire pressure monitoring sensor further includes a sealing ring, which is located between the housing 1 and the housing cover 2 and is disposed in an annular groove on a lower surface of the housing cover 2 along a circumferential direction of the housing cover, and a cross-sectional diameter of the sealing ring is greater than a depth of the annular groove. Therefore, the sealing performance of the closed cavity formed after the casing and the casing cover are combined is ensured, and gas, water or other impurities in the tire air cavity are effectively prevented from entering the casing to influence the normal work of the tire pressure monitoring module and the power supply.
In this embodiment, after the assembly of the tire pressure monitoring module is completed, insert the first tenon 32 of the both sides of the circuit board 3 into the first mortise along the height direction of the housing 1, realize the initial positioning of the circuit board 3 in the housing 1, press the second tenon 33 of the bottom end of the circuit board 3 into the second mortise on the bottom surface in the housing 1, wherein, the one side of the circuit board 3 on which the tire pressure monitoring chip 4 is arranged is just opposite to the front end side wall of the housing 1, make the detection hole 41 just opposite to the through hole 13 on the housing 1, press the sealing device 42 into the mounting groove of the inner wall of the housing 1, make the perforation of the sealing device 42 communicate with the detection hole 41 and the through hole 13 and form an independent cavity communicated with the outside of the housing 1. Then, the power supply 6 is installed in the limit groove 14 of the inner bottom surface of the housing 1, so that the power supply 6 is preliminarily positioned, the first conductive plate 7 and the second conductive plate 8 are installed, and the power supply 6 is pressed and fixed in the front-rear direction of the housing 1 through the first conductive plate 7 and the second conductive plate 8. Finally, attach together cap 2 at casing 1 top, seal the upper portion opening of first tongue-and-groove and compress tightly inside first tenon 32 through cap 2 to 14 cooperations through the top surface in cap 2 compress tightly power 6, further carry out spacing fixed to circuit board 3 and power 6, guarantee the connection stability of each part in the work, prevent that external factors such as the vibration of vehicle driving in-process from influencing tire pressure monitoring accuracy and stability. In the above-mentioned installation, circuit board 3 is installed inside casing 1 through tenon fourth of twelve earthly branches structure (first tenon 32 and first tongue-and-groove cooperation) direct location, power 6 is spacing jointly through upper and lower two spacing grooves 14 and first current conducting plate 7 and second current conducting plate 8 at both ends around with, the installation is simple, and is convenient, each electronic component connects stably, reliably, and there is not bolted connection in the airtight cavity inside that casing 1 and cap 2 formed, when lightening the whole weight of sensor, the tire pressure monitoring module short circuit or the 6 damage scheduling problems of power that cause because of the bolt is not hard up or the reasons such as drop have been avoided. In addition, the tenon fourth of twelve earthly branches structure is spacing from a plurality of directions to being connected of circuit board and casing, has effectively guaranteed the relative stability of circuit board and casing to, make the inspection hole 41 on the tire pressure monitoring chip 4 just to the through-hole 13 on the casing 1 all the time, improved tire pressure monitoring's accuracy and stability.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A lightweight tire pressure monitoring sensor, comprising:
the shell is of a hollow structure without a cover, and the front end of the shell is provided with a through hole;
the shell cover is arranged at the top of the shell and forms a closed cavity with the shell cover;
the tire pressure monitoring module is arranged in the shell and comprises a circuit board which is in matched insertion with the inner side wall of the shell through a mortise and tenon structure; the tire pressure monitoring chip and the wireless transmission module are arranged on the circuit board at intervals and are electrically connected with the circuit board, and the detection hole of the tire pressure monitoring chip is arranged right opposite to the through hole;
the sealing device is arranged between the detection hole and the through hole and is communicated with the detection hole and the through hole, and the sealing device, the detection hole and the through hole jointly form a cavity communicated with an air cavity of the tire;
the power supply is located at the rear end of the tire pressure monitoring module and fixed between the inner bottom surface of the shell and the shell cover, and the power supply is electrically connected with the circuit board through a conductive plate.
2. The lightweight tire pressure monitoring sensor according to claim 1, wherein the mortise and tenon structure includes two first mortises provided on inner sidewalls of both sides of the housing in opposition, either one of the first mortises being provided in a height direction of the housing and communicating with an upper surface of the housing; the two first tenons are respectively arranged on two sides of the board body of the circuit board and are in joggle joint with the two first mortises; the two second mortises are oppositely arranged on the inner bottom surface of the shell and the inner top surface of the shell cover; and the two second tenons are respectively arranged at two ends of the board body of the circuit board and are in joggle joint with the two second mortises.
3. The light tire pressure monitoring sensor according to claim 2, wherein the conductive plate comprises a first conductive plate and a second conductive plate, the first conductive plate and the second conductive plate are respectively fixed inside the housing, two ends of the first conductive plate are respectively connected with the positive electrode of the power supply and the circuit board, and two ends of the second conductive plate are respectively connected with the negative electrode of the power supply and the circuit board; the first conductive plate and the second conductive plate press the power supply from a front end and a rear end of the power supply toward each other, respectively.
4. The light tire pressure monitoring sensor according to claim 3, wherein the inner side walls of the two sides of the housing are provided with slots communicated with the corresponding first mortises; the positive electrode and the negative electrode of the circuit board are respectively located on the end faces of the two first tenons and are arranged right opposite to the slots on the same side, one end of the first conductive plate extends into the slot on one side and is abutted to the positive electrode on the end face of the first tenon, and one end of the second conductive plate extends into the slot on the other side and is abutted to the negative electrode on the end face of the first tenon.
5. The light tire pressure monitoring sensor of claim 4, wherein the positive and negative electrodes of the circuit board each include a plurality of electrodes spaced apart along a height of the housing.
6. The light tire pressure monitoring sensor according to claim 1, wherein the front and rear surfaces of the board body of the circuit board are coated with three-proofing paint.
7. The light tire pressure monitoring sensor of claim 1, wherein the housing is located inside the air chamber of the tire and is fixed to the wheel hub by a mounting means, the mounting means including a fixing plate fixed to an outer wall of the housing and extending outward, the fixing plate having a mounting hole in a middle portion thereof; and the stiffening plate is arranged on the fixing plate and is connected with the fixing plate and the outer wall of the shell.
8. The light tire pressure monitoring sensor of claim 1, further comprising a seal ring located between the housing and the housing cover and disposed in an annular groove in a lower surface of the housing cover in a circumferential direction of the housing cover, the seal ring having a cross-sectional diameter greater than a depth of the annular groove.
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| CN202110741446.XA CN113479021B (en) | 2021-06-30 | 2021-06-30 | Lightweight tire pressure monitoring sensor |
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| CN202110741446.XA CN113479021B (en) | 2021-06-30 | 2021-06-30 | Lightweight tire pressure monitoring sensor |
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| CN113479021B CN113479021B (en) | 2022-05-13 |
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Cited By (1)
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| CN114433434A (en) * | 2022-01-26 | 2022-05-06 | 宿州中锦科技有限公司 | Tire pressure sensor chip mounting equipment and chip mounting method |
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| CN113479021B (en) | 2022-05-13 |
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Denomination of invention: A lightweight tire pressure monitoring sensor Effective date of registration: 20230215 Granted publication date: 20220513 Pledgee: Bank of China Limited Wuhan Jiang'an sub branch Pledgor: Wuhan Shendong Auto Electronics Co.,Ltd. Registration number: Y2023420000052 |
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