Tire pressure sensor

Abstract

The utility model relates to the technical field of automobile parts, in particular to a tire pressure sensor. The sensor comprises a sensor body and an inflating valve connected with the sensor body, the sensor body comprises a shell and a cover plate, a PCB assembly is installed in a cavity formed by the shell and the cover plate, a circle of welding ribs are arranged on the edge of the side, close to the cover plate, of the shell, a welding groove is formed in the face, facing the PCB assembly, of the cover plate, and the welding ribs can be clamped into the welding groove. A guide groove corresponding to the welding groove in position is formed in the face, away from the PCB assembly, of the cover plate. The guide groove is defined by two protruding ribs. After the prior art is improved, when laser penetrates through the cover plate for welding, the laser can move along the guide groove in the outer side face of the cover plate, the laser can accurately face the welding rib to weld the shell and the cover plate together, and therefore the welding effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a tire pressure sensor. Background Art

[0002] The size of tire pressure will directly affect the driving safety of motor vehicles (for example, cars or motorcycles, etc.). Therefore, tire pressure sensor assemblies are generally installed in the tires of motor vehicles. When the motor vehicle is driving, the tire pressure sensor assembly automatically monitors the tire pressure in real time and sends the monitoring data (generally including temperature and tire pressure) to a receiver inside the motor vehicle. The driver can judge the safety status of the tires of the driving motor vehicle by observing the display platform data or the alarm sound emitted by the receiver.

[0003] For example, a Chinese patent document with authorization number CN207902044U discloses a tire pressure monitoring sensor structure, including a sensor sensing device connected to a valve stem through a fastener, and the sensor sensing device includes a cover plate, a PCB assembly, a sealing gasket and a sensor sensing device housing; the sensor sensing device housing and the cover plate are connected and fixed together by laser welding, a cavity is formed between the sensor sensing device housing and the cover plate, the PCB assembly is arranged in the cavity, the sealing gasket is arranged between the sensor sensing device housing and the PCB assembly, the cover plate is a plastic cover plate that can be penetrated by laser, laser welding ribs are arranged around the edge of the sensor sensing device housing, and a laser welding groove is arranged on the edge of the cover plate facing the PCB assembly; however, when welding by laser penetrating the cover plate, when welding along the edge of the sensor sensing device housing, the welding position is not easy to grasp, and it is easy to deviate and affect the welding effect.

[0004] Therefore, it is necessary to improve the deficiencies in the above prior art. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a tire pressure sensor in view of the above-mentioned deficiencies of the prior art, so as to solve the problem in the prior art that when welding along the edge of the shell of the sensor induction device by laser penetrating the cover plate, the welding position is difficult to grasp and is prone to deviation, thus affecting the welding effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tire pressure sensor, comprising a sensor body and a valve nozzle connected to the sensor body, the sensor body comprising a shell and a cover plate, a PCB assembly is installed in the cavity formed by the shell and the cover plate, a welding rib is provided around the edge of the shell close to the cover plate, a welding groove is provided on a side of the cover plate facing the PCB assembly, the welding rib can be inserted into the welding groove, and a guide groove corresponding to the position of the welding groove is provided on a side of the cover plate facing away from the PCB assembly.

[0007] By adopting the above technical solution, when the laser penetrates the cover plate for welding, it can move along the guide groove on the outer surface of the cover plate. The laser can accurately weld the shell and the cover plate together along the welding ribs, thereby improving the welding effect.

[0008] The above technical solution is further configured as follows: the guide groove is formed by enclosing two raised ribs.

[0009] By adopting the above technical solution, during laser welding, the cover plate is fixed by squeezing the glass, and the two raised ribs are stressed, so that the welding groove and the welding ribs are squeezed more fully, which can further improve the welding effect.

[0010] The above technical solution is further configured as follows: a surface of the cover plate facing the PCB assembly is provided with a plurality of guide posts extending vertically outward, a side of the shell facing the cover plate is provided with guide holes transitionally matched with the guide posts, an end of the guide post close to the guide hole is provided with an outer conical surface, and an inner conical surface matching with the outer conical surface is provided on the inner wall of the end of the guide hole close to the guide post.

[0011] By adopting the above technical solution, when the cover plate is installed on the shell in cooperation with the manipulator of the automated equipment, the inner conical surface of the guide column and the inner conical surface of the guide hole cooperate, making it easier to insert the guide column into the guide hole, and further enabling the welding rib to be accurately inserted into the welding groove, thereby ensuring the position accuracy of the cover and the shell when assembled.

[0012] The above technical solution is further configured as follows: the valve comprises a valve body, a fastening screw threadedly connected to an end of the valve body close to the shell, a valve cap threadedly connected to an end of the valve body away from the shell, and a screw sleeve threadedly connected to the middle part of the valve body; a valve core is installed inside the end of the valve body close to the valve cap, a hemispherical body is provided at an end of the valve body close to the shell, a hemispherical groove matching the hemispherical body of the valve body is provided on the shell, a strip hole penetrating the shell is provided at the bottom of the hemispherical groove, and the fastening screw is threadedly connected to the valve body through the strip hole to achieve a fastening connection between the sensor body and the valve body.

[0013] By adopting the above technical solution, through the hemispherical part of the valve body, the hemispherical groove on the shell and the strip hole design, the angle between the valve body and the sensor body can be adjusted as needed during installation, so that the sensor body is attached to the inner side of the wheel hub and then the fixing screws are tightened, thereby improving stability and enhancing adaptability.

[0014] The above technical solution is further configured as follows: the fastening screw sleeve is provided with an elastic anti-loosening washer, and the surfaces of the shell located on both sides of the strip hole are configured as arcs and are provided with anti-slip stripes thereon.

[0015] By adopting the above technical solution, the pre-tightening force between the fastening screw and the valve body is increased by the elastic anti-loosening washer, which has a certain effect of preventing loosening; the anti-slip stripes can increase the friction between the anti-loosening washer and the shell, making it less likely for the sensor body and the valve body to have an angle deflection.

[0016] The above technical solution is further configured as follows: an annular gasket and a sealing ring are provided in sequence between the threaded sleeve and the hemispherical body, and a sealing gasket is provided between the valve cap and the end of the valve body.

[0017] By adopting the above technical solution, when the tire pressure sensor is installed on the wheel hub, the sealing ring and the annular gasket on both sides of the wheel hub mounting hole can improve the sealing after the threaded sleeve is threadedly connected to the valve body; the sealing gasket arranged between the valve cap and the end of the valve body is also to improve the sealing.

[0018] The above technical solution is further configured as follows: the fastening screw is axially provided with a first air inlet hole connected to the interior of the valve body, and the valve body is provided with a second air inlet hole connected to the interior of the valve body near the hemispherical body.

[0019] By adopting the above technical solution, when inflating the tire, air can be taken in through the first air inlet hole and the second air inlet hole at the same time, thereby improving the inflation efficiency; in addition, the second air inlet hole can be used to facilitate screwing with the help of tools during disassembly and assembly.

[0020] The above technical solution is further configured as follows: the PCB assembly includes a PCB board and a battery electrically connected to the PCB board, a sensor is installed on the PCB board, a sensing hole connected to the interior of the sensor body is provided on the side of the shell away from the cover plate, an induction sealing ring for sealing fit is provided between the corresponding sensing hole positions of the sensor and the shell, and an installation groove for installing the induction sealing ring is provided on the shell.

[0021] By adopting the above technical solution, the inside of the tire is connected with the inside of the sensor body through the sensing hole, so that the air pressure inside and outside is consistent, so that the sensor can sense and monitor the internal air pressure of the tire; the sensing sealing ring can isolate the gap except the sensing hole.

[0022] The beneficial effect achieved by the utility model is that when the laser penetrates the cover plate for welding, it can move along the guide groove on the outer side of the cover plate, and the laser can accurately weld the shell and the cover plate together along the welding ribs, thereby improving the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the cover plate in the embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of the outer structure of the housing in the embodiment of the utility model;

[0027] Figure 5 It is a schematic diagram of the inner structure of the shell in the embodiment of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1-5 As shown in, a tire pressure sensor comprises a sensor body 1 and a valve 2 connected to the sensor body 1, the sensor body 1 comprises a shell 3 and a cover plate 4, a PCB assembly 5 is installed in a cavity formed by the shell 3 and the cover plate 4, a welding rib 31 is arranged around the edge of the shell 3 close to the cover plate 4, a welding groove 41 is arranged on the side of the cover plate 4 facing the PCB assembly 5, the welding rib 31 can be inserted into the welding groove 41, a guide groove 42 corresponding to the position of the welding groove 41 is arranged on the side of the cover plate 4 facing away from the PCB assembly 5, and the guide groove 42 is formed by two raised ribs; a plurality of guide posts 43 extending vertically outward are arranged on the side of the cover plate 4 facing the PCB assembly 5, a guide hole 32 transitionally matched with the guide post 43 is arranged on the side of the shell 3 facing the cover plate 4, an outer conical surface is arranged on the end of the guide post 43 close to the guide hole 32, and an inner conical surface matching with the outer conical surface is arranged on the inner wall of the end of the guide hole 32 close to the guide post 43;

[0030] like Figure 1 , 2As shown in the figure, the valve 2 includes a valve body 21, a fastening screw 22 threadedly connected to the end of the valve body 21 close to the shell 3, a valve cap 23 threadedly connected to the end of the valve body 21 away from the shell 3, and a screw sleeve 24 threadedly connected to the middle part of the valve body 21. The valve core 29 is installed inside the end of the valve body 21 close to the valve cap 23 through a thread. The end of the valve body 21 close to the shell 3 is provided with a hemispherical body 211, and the shell 3 is provided with a hemispherical groove 30 matching the hemispherical body 211 of the valve body 21. The bottom of the hemispherical groove 30 is provided with a through The strip hole 33 of the shell, the fastening screw 22 is threadedly connected with the valve body 21 through the strip hole 33 to achieve the fastening connection between the sensor body 1 and the valve body 21, an annular gasket 25 and a sealing ring 26 are arranged between the screw sleeve 24 and the hemispherical body 211 in sequence, a sealing gasket 27 is arranged between the valve cap 23 and the end of the valve body 21, the fastening screw 22 is axially provided with a first air inlet hole 220 connected to the inside of the valve body 21, and the valve body 21 is provided with a second air inlet hole 210 connected to the inside of the valve body 21 near the hemispherical body 211.

[0031] like Figure 2 , 4 As shown in the figure, the fastening screw 22 is provided with an elastic anti-loosening washer 28, and the surfaces of the shell 3 located on both sides of the strip hole 33 are arranged in an arc shape and are provided with anti-slip stripes 34 thereon. The elastic anti-loosening washer 28 increases the pre-tightening force of the connection between the fastening screw 22 and the valve body 21, which has a certain effect of preventing loosening; the anti-slip stripes 34 can increase the friction between the anti-loosening washer 28 and the shell 3, so that it is not easy for the sensor body 1 and the valve body 21 to deflect at an angle.

[0032] like Figure 2 , 4 As shown in , 5 , the PCB assembly 5 includes a PCB board 51 and a battery 52 electrically connected to the PCB board 51, a sensor 53 is installed on the PCB board 51, a sensing hole 35 connected to the interior of the sensor body 21 is provided on the side of the shell 3 away from the cover plate 4, a sealing induction sealing ring 54 is provided between the sensor 53 and the corresponding sensing hole 35 of the shell 3, and a mounting groove 36 for mounting the induction sealing ring 54 is provided on the shell 3, and the induction sealing ring 54 can isolate the gap except the sensing hole 35.

[0033] In the above embodiment, when the laser penetrates the cover plate 4 for welding, it can move along the guide groove 42 on the outer surface of the cover plate 4, and the laser can accurately weld the shell 3 and the cover plate 4 together at the welding ribs 31, thereby improving the welding effect; in addition, the cover plate 4 is fixed by squeezing the glass, and the two raised ribs are stressed, so that the welding groove 41 and the welding ribs 31 are squeezed more fully, which can further improve the welding effect.

Claims

1. A tire pressure sensor, comprising a sensor body and a valve connected to the sensor body, the sensor body comprising a shell and a cover plate, a PCB assembly is installed in a cavity formed by the shell and the cover plate, a welding rib is arranged around an edge of the shell close to the cover plate, a welding groove is arranged on a side of the cover plate facing the PCB assembly, the welding rib can be inserted into the welding groove, and the sensor body is characterized in that: A guide groove corresponding to the position of the welding groove is provided on a side of the cover plate facing away from the PCB assembly.

2. A tire pressure sensor according to claim 1, characterized in that: The guide groove is formed by enclosing two raised ribs.

3. A tire pressure sensor according to claim 2, characterized in that: A plurality of guide posts extending vertically outward are provided on the side of the cover plate facing the PCB assembly, a guide hole transitionally matched with the guide post is provided on the side of the shell facing the cover plate, an outer conical surface is provided on one end of the guide post close to the guide hole, and an inner conical surface matching with the outer conical surface is provided on the inner wall of the guide hole close to one end of the guide post.

4. A tire pressure sensor according to claim 3, characterized in that: The valve comprises a valve body, a fastening screw threadedly connected to an end of the valve body close to the shell, a valve cap threadedly connected to an end of the valve body away from the shell, and a screw sleeve threadedly connected to the middle part of the valve body. A valve core is installed inside the end of the valve body close to the valve cap, a hemispherical body is provided at an end of the valve body close to the shell, a hemispherical groove matching the hemispherical body of the valve body is provided on the shell, a strip hole penetrating the shell is provided at the bottom of the hemispherical groove, and the fastening screw is threadedly connected to the valve body through the strip hole to achieve a fastening connection between the sensor body and the valve body.

5. A tire pressure sensor according to claim 4, characterized in that: The fastening screw sleeve is provided with an elastic anti-loosening washer, and the surfaces of the shell located on both sides of the strip hole are arranged in an arc shape and are provided with anti-slip stripes.

6. A tire pressure sensor according to claim 5, characterized in that: An annular gasket and a sealing ring are arranged in sequence between the threaded sleeve and the hemispherical body, and a sealing gasket is arranged between the air valve cap and the end of the air valve body.

7. A tire pressure sensor according to claim 6, characterized in that: The fastening screw is axially provided with a first air inlet hole connected to the interior of the valve body, and the valve body is provided with a second air inlet hole connected to the interior of the valve body near the hemispherical body.

8. A tire pressure sensor according to any one of claims 1 to 7, characterized in that: The PCB assembly includes a PCB board and a battery electrically connected to the PCB board, a sensor is installed on the PCB board, a sensing hole connected to the interior of the sensor body is provided on the side of the shell away from the cover plate, an induction sealing ring is provided between the corresponding sensing hole positions of the sensor and the shell, and an installation groove for installing the induction sealing ring is provided on the shell.

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