WO2023213231A1 - 胎压传感器以及胎压检测系统 - Google Patents

胎压传感器以及胎压检测系统 Download PDF

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Publication number
WO2023213231A1
WO2023213231A1 PCT/CN2023/091331 CN2023091331W WO2023213231A1 WO 2023213231 A1 WO2023213231 A1 WO 2023213231A1 CN 2023091331 W CN2023091331 W CN 2023091331W WO 2023213231 A1 WO2023213231 A1 WO 2023213231A1
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WIPO (PCT)
Prior art keywords
tire pressure
pressure detection
groove body
sealing member
pressure sensor
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PCT/CN2023/091331
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English (en)
French (fr)
Inventor
卢海斌
张登国
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Autel Intelligent Technology Corp Ltd
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Autel Intelligent Technology Corp Ltd
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Publication of WO2023213231A1 publication Critical patent/WO2023213231A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • 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

Definitions

  • the present application relates to the technical field of tire pressure detection, and in particular to a tire pressure sensor and a tire pressure detection system.
  • Tire pressure plays a vital role in the safe driving of the car. Tire pressure that is too high or too low may cause a puncture or tire puncture.
  • the existence of tire pressure sensors allows drivers to know changes in tire pressure anytime and anywhere.
  • a tire pressure detection system composed of a tire pressure sensor combined with other control components can automatically detect tire pressure while the car is driving, and alarm for tire leakage and low air pressure to ensure driving safety.
  • Existing tire pressure sensors usually include a housing and a tire pressure detection component.
  • the casing can be fixed to the air hole of the tire through the connecting piece.
  • the tire pressure detection component is accommodated in the casing and connected with the air hole of the tire, so that the tire pressure detection component obtains the air pressure in the tire and wirelessly transmits the air pressure of the tire. Air pressure is transmitted to a receiver on the vehicle.
  • the seal between the casing and the tire pressure detection component is particularly important.
  • Most tire pressure sensors use seals to seal the gap between the casing and the tire pressure detection component. However, the seal is affected by the production process and its surface is prone to burrs, making The seal and housing are poorly assembled.
  • embodiments of the present application provide a tire pressure sensor and a tire pressure detection system to improve the situation where the seal is easily affected by burrs and causes poor assembly.
  • a tire pressure sensor including a housing, a tire pressure detection component and a seal.
  • the shell has a cavity and a tank connected to the cavity.
  • the tank is provided with a through hole.
  • the through hole is used to communicate the tank with the outside world.
  • the inner peripheral wall of the tank is provided with protruding ribs. .
  • the tire pressure detection component is housed in the cavity.
  • the tire pressure detection component includes a circuit board, a tire pressure detection chip and a wireless transmission module.
  • the tire pressure detection chip and the wireless transmission module are both electrically connected to the circuit board.
  • the tire pressure detection chip is connected to the top of the tank and closes the opening of the tank.
  • the sealing member is received in the groove body, and the sealing member is in contact with the rib, so that a gap is formed between the outer peripheral surface of the sealing member and the inner peripheral wall of the groove body, and the sealing member is provided with a connection hole, and the connecting hole communicates with the through hole and the air pressure hole of the tire pressure detection chip.
  • the tank body includes a first tank body and a second tank body that communicate with each other.
  • the first tank body is located at the top of the tank body and is connected to the cavity of the housing.
  • the second tank body is located at the bottom of the tank body.
  • the tire pressure detection chip is contained in the first groove body and closes the opening of the second groove body.
  • the sealing member is contained in the second groove body.
  • the protruding rib is connected to the second groove body.
  • the inner peripheral wall of the body, the through hole is located in the second groove body.
  • the gap between the inner peripheral wall of the second groove body and the outer peripheral surface of the seal is 0.2mm-0.6mm.
  • the rib includes a main body and a guide portion connected to the main body, and the guide portion is located at an end of the inner peripheral wall of the second tank body close to the first tank body. .
  • the thickness of the guide portion gradually increases from the first groove body to the second groove body.
  • the main body part has a draft surface facing the groove body, and the draft angle of the draft surface is 0°-0.5°.
  • the number of the protruding ribs is four, and the four protruding ribs are arranged around the inner peripheral wall of the second groove body.
  • the tire pressure sensor further includes sealant, the sealant is respectively filled in the gap between the inner peripheral wall of the second groove body and the outer peripheral surface of the seal, and the The gap between the tire pressure detection chip and the top wall of the second tank body.
  • the viscosity of the sealant is 1500-4500 cps.
  • the sealing member is made of silicone.
  • a tire pressure detection system including a controller and the above-mentioned tire pressure sensor.
  • the tire pressure sensor is communicatively connected to the controller through the wireless transmission module.
  • the beneficial effects of the embodiments of the present application are: since the seal will inevitably produce burrs on its outer peripheral surface due to the influence of the production process, when the seal is assembled in the tank body of the shell, the burrs will abut against the inner peripheral wall of the tank body. Applying force to the sealing element causes the sealing element to tend to detach from the tank body, which may cause the sealing element to be easily assembled incorrectly or even detached from the tank body.
  • a gap is formed between the outer peripheral surface of the sealing member through the convex rib and the inner peripheral wall of the groove body, and the burrs of the sealing member can be accommodated in the gap.
  • the burrs on the sealing element are no longer easily in contact with the inner peripheral wall of the groove body and exert force on the sealing element. This improves the situation of poor assembly between the sealing element and the housing.
  • Figure 1 is a cross-sectional view of a tire pressure sensor provided by an embodiment of the present application
  • Figure 2 is a schematic structural diagram of the second housing in Figure 1 at an angle
  • Figure 3 is a schematic structural view of the second housing in Figure 1 from another angle;
  • Figure 4 is a cross-sectional view taken at C-C in Figure 3 .
  • orientation indicated by directional words such as “front, back, up, down, left, right", “horizontal, vertical, vertical, horizontal” and “top, bottom” etc.
  • positional relationship is usually based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description. Without explanation to the contrary, these directional words do not indicate and imply the referred devices or components. It must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the scope of the present application; the orientation words “inside and outside” refer to the inside and outside relative to the outline of each component itself.
  • FIG. 1 is a schematic structural diagram of a tire pressure sensor provided by an embodiment of the present application.
  • the tire pressure sensor includes a housing 10 , a tire pressure detection component 20 and a seal 30 .
  • the shell 10 has a cavity 10a and a tank body 121 connected with the cavity 10a.
  • the bottom of the tank body 121 is provided with a through hole 122 that communicates the tank body 121 with the outside world.
  • the inner peripheral wall of the tank body 121 is provided with protruding ribs 123.
  • the tire pressure detection component 20 is received in the cavity 10a of the housing 10.
  • the tire pressure detection component 20 includes a circuit board 21, a tire pressure detection chip 22 and a wireless transmission module (not shown) electrically connected to the circuit board 21.
  • the tire pressure detection chip 22 is connected to the top of the tank body 121 and closes the opening of the tank body 121 .
  • the sealing member 30 is received in the groove body 121, and the sealing member 30 abuts against the convex rib 123, so that a gap is formed between the outer peripheral surface of the sealing member 30 and the inner peripheral wall of the groove body 121.
  • the sealing member 30 is provided with a connecting hole 30a. 30a communicates with the through hole 122 and the air pressure hole of the tire pressure detection chip 22.
  • the seal 30 Since the seal 30 is affected by the production process, burrs will inevitably be generated on its outer peripheral surface. When the seal 30 is assembled into the groove body 121 of the housing 10 , the burrs abutting against the inner peripheral wall of the groove body 121 will cause damage to the seal 30 Applying force causes the sealing member 30 to tend to detach from the groove body 121 , which may cause the sealing member 30 to be easily assembled incorrectly or even detached from the groove body 121 . In the embodiment of the present application, a gap is formed between the outer peripheral surface of the sealing member 30 through the protruding ribs 123 and the inner peripheral wall of the groove body 121, and the burrs of the sealing member 30 can be accommodated in the gap. In other words, the burrs on the sealing member 30 are no longer easily in contact with the inner peripheral wall of the groove body 121 and exert force on the sealing member 30 . This improves the poor assembly of the sealing member 30 and the housing 10 .
  • the tire pressure sensor can be installed at the air hole of the tire.
  • the gas in the tire can enter the groove body 121 of the tire pressure sensor through the through hole 122 and then be restricted by the seal 30 and directly lead to
  • the air pressure hole of the tire pressure detection chip 22 enables the tire pressure detection chip 22 to detect the tire temperature, tire pressure and other data in the tire through the air pressure hole to generate tire status information and transmit it to the control module of the circuit board 21 to control
  • the module will transmit the generated tire status information to the monitoring device through the wireless transmission module.
  • the monitoring device can be placed near the driver's seat for the driver's convenience. It can also be integrated with the car manufacturer's trip computer and displayed directly on the vehicle's dashboard, allowing the driver to know whether the tire status is abnormal at any time.
  • the specific structure of the housing 10 will be described with reference to the illustrations in the drawings.
  • FIG. 2 is a schematic structural diagram of the first housing 11 in FIG. 1.
  • the housing 10 includes a first housing 11 and a second housing 12 .
  • the first housing 11 and the second housing 12 are connected and enclosed to form the above-mentioned cavity 10a.
  • the second housing 12 is provided with a through hole 122 penetrating the surface of the second housing 12 close to the cavity 10a and the surface away from the cavity 10a.
  • the surface of the second housing 12 close to the cavity 10a faces the first shell.
  • the direction of the body 11 protrudes to form a boss 124, and the boss 124 is provided with a groove body 121.
  • the groove body 121 includes a first groove body 121a and a second groove body 121b that are connected with each other.
  • the first groove body 121a is located at the top end of the groove body 121 close to the boss 124, and is connected with the cavity 10a of the housing 10.
  • the first groove body 121a is adapted to the shape of the tire pressure detection chip 22, and the first groove body 121a is used to accommodate the tire pressure detection chip 22.
  • the second groove body 121b is located at one end of the surface of the second housing 12 close to the cavity 10a.
  • the second groove body 121b is used to accommodate the seal 30.
  • the inner peripheral wall of the second groove body 121b partially extends toward the central axis direction of the through hole 122.
  • the above-mentioned protruding ribs 123 are formed.
  • the through hole 122 is located in the second groove body 121b, and the through hole 122 is used to communicate the second groove body 121b with the outside world.
  • the shape of the through hole 122 is not specifically limited.
  • the through hole 122 is a circular, square, rectangular or other polygonal prism hole.
  • the connection hole 30a of the sealing member 30 is not specifically limited.
  • the cross-sectional area of the second groove body 121b gradually decreases.
  • the first housing 11 and the second housing 12 are both made of nylon and glass fiber materials.
  • the second groove body 121b of the second housing 12 needs to have a draft angle to facilitate smooth demoulding, that is, the cross-sectional area of the side of the second groove body 121b close to the first groove body 121a It is smaller than the cross-sectional area of the side of the second groove body 121b close to the through hole 122 .
  • the seal 30 needs to have an interference fit with the second housing 12 to reduce the connection failure of the seal 30 due to vibration, impact, etc. Therefore, the side of the second groove body 121b close to the first groove body 121a The cross-sectional area of is equal to the cross-sectional area of the seal 30 . In this way, when the sealing member 30 is installed in the second groove body 121b, the sealing member 30 can continuously exert force on the protruding ribs 123 to achieve positioning.
  • the number of the protruding ribs 123 is four, and the four protruding ribs 123 are arranged around the inner peripheral wall of the second groove body 121b around the axial direction of the through hole 122 . In this way, the sealing member 30 can evenly receive the force of the four protruding ribs 123. At this time, the four protruding ribs 123 can play a positioning role to ensure that the sealing member 30 is centered and is not easily deflected. It can be understood that the number of protruding ribs 123 is not limited to this and can be adjusted according to actual usage requirements. For example, the number of protruding ribs 123 can also be three, five or more than five, as long as the seal 30 is satisfied.
  • the ratio of the total area of the four bosses 124 and the sealing member 30 to the area of the outer peripheral surface of the sealing member 30 is 5%-50%. Preferably, the ratio is 10%.
  • FIG. 3 is a schematic structural diagram of the first housing 11 in FIG. 1 from another perspective
  • FIG. 4 is a cross-sectional view at C-C in FIG. 3.
  • the rib 123 includes a main body 1231 and a guide part 1232 connected to the main body 1231 .
  • the guide portion 1232 is located at an end of the second groove body 121b close to the first groove body 121a. When viewed from the first groove body 121a toward the second groove body 121b, the thickness of the guide portion 1232 gradually increases.
  • the cross-sectional area of the sealing member 30 is equal to the cross-sectional area of the side of the second groove body 121b close to the through hole 122, the end of the rib 123 close to the first groove body 121a is chamfered, and the sealing member 30 will be guided
  • the guiding function of the portion 1232 makes it easier to contact the main body portion 1231 of the protruding rib 123 .
  • the main body 1231 has a draft surface facing the central axis direction of the through hole 122, and the draft angle of the draft surface satisfies 0°-0.5°. Based on this, while ensuring the assembly effect of the seal 30, it also This is beneficial to the normal release of the protruding ribs 123.
  • the tire pressure sensor further includes a sealant 40 .
  • the sealant 40 is filled in the gap between the inner peripheral wall of the second tank 121 b and the outer peripheral surface of the seal 30 , and between the tire pressure detection chip 22 and the top wall of the second tank 121 b. Clearance.
  • the sealant 40 is a flexible sealant, and the viscosity of the flexible sealant is 1500-4500 cps. Within this viscosity range, the fluidity of the liquid flexible sealant can meet the packaging needs of the seal 30 to ensure that after packaging The reliability of the sealant reduces the solidification time of the liquid flexible sealant.
  • the sealing member 30 is first inserted into the second groove body 121b along the direction of the central axis of the through hole 122, and the sealing member 30 abuts against the protruding ribs 123, and then the sealant 40 is poured into the second groove body 121b. , so that the sealant 40 fills the gap between the sealing member 30 and the inner peripheral wall of the second groove body 121b.
  • the tire pressure detection chip 22 is inserted into the first groove body 121 a and pressed into contact with the sealing member 30 .
  • the gap between the outer peripheral surface of the sealing member 30 and the inner peripheral wall of the first groove 121a becomes smaller, causing the sealant 40 in the gap to overflow to the tire pressure detection chip 22 and the inner peripheral wall of the first groove body 121a.
  • the sealant 40 in the gap between the tops of the second grooves 121b, when the sealant 40 is solidified, the tire pressure detection chip 22 will be sealed and fixed in the first groove 121a, and the packaging is completed.
  • the gap between the inner peripheral wall of the second groove body 121b and the outer peripheral surface of the seal 30 is 0.2mm-0.6mm. Within this gap range, good sealing performance between the encapsulated tire pressure detection chip 22 and the second housing 12 can be ensured, while taking into consideration the space occupied by the burrs of the seal 30 . It can be understood that in other embodiments, the gap between the inner peripheral wall of the second groove body 121b and the outer peripheral surface of the seal 30 may also be greater than 0.6 mm.
  • the seal 30 is made of silicone, for example, organic silicone and polyurethane.
  • this application also provides a tire pressure detection system, including a controller and the above-mentioned tire pressure sensor.
  • the tire pressure sensor can be communicatively connected to the controller through a wireless transmission module.
  • a wireless transmission module Regarding the specific structure of the tire pressure sensor, please refer to the above description and will not be repeated here.

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  • Measuring Fluid Pressure (AREA)

Abstract

本申请实施例涉及轮胎压力检测技术领域，公开了一种胎压传感器以及胎压检测系统，该胎压传感器包括外壳、胎压检测组件以及密封件。外壳具有腔体以及与腔体连通的槽体，槽体设有通孔，通孔用于将槽体与外界连通，槽体的内周壁设有凸肋。胎压检测组件收容于腔体，胎压检测组件包括电路板、胎压检测芯片和无线传输模块，胎压检测芯片、无线传输模块均与电路板电连接，胎压检测芯片连接于槽体的顶部并封闭槽体的开口。密封件收容于槽体，密封件抵接于凸肋，以使得密封件的外周面与槽体的内周壁之间形成间隙，密封件设有连接孔，连接孔连通通孔和胎压检测芯片的气压孔。通过上述方式，能够改善密封件易受毛刺影响而产生的装配不良的情形。

Description

胎压传感器以及胎压检测系统
本申请要求于2022年5月6日提交中国专利局、申请号为202221069062.4、申请名称为“胎压传感器以及胎压检测系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及轮胎压力检测技术领域，特别是涉及一种胎压传感器以及胎压检测系统。
背景技术
轮胎胎压对于汽车的安全行驶具有至关重要的作用，过高或过低的胎压皆可能导致爆胎或破胎。胎压传感器的存在使驾驶人员能够随时随地知晓轮胎胎压的变化。进一步地，以胎压传感器结合其他控制部件组成的胎压检测系统能够在汽车行驶过程中对轮胎气压自动检测，并对轮胎漏气和低气压进行报警，确保行车安全。
现有胎压传感器通常包括外壳和胎压检测组件。外壳可通过连接件固定于轮胎的打气孔，胎压检测组件容置于外壳内，并与轮胎的打气孔相连通，以使得胎压检测组件获取轮胎内的气压并以无线传输方式将轮胎的气压传输至车辆上的接收器。其中，外壳和胎压检测组件之间的密封尤为重要，胎压传感器大多通过密封件来密封外壳和胎压检测组件之间的间隙，但该密封件受生产工艺影响其表面易产生毛刺，使得密封件与外壳存在装配不良的情形。
发明内容
鉴于上述问题，本申请实施例提供了一种胎压传感器以及胎压检测系统，改善密封件易受毛刺影响而产生的装配不良的情形。
根据本申请实施例的一个方面，提供的一种胎压传感器，包括外壳、胎压检测组件以及密封件。外壳具有腔体以及与所述腔体连通的槽体，所述槽体设有通孔，所述通孔用于将所述槽体与外界连通，所述槽体的内周壁设有凸肋。胎压检测组件收容于所述腔体，所述胎压检测组件包括电路板、胎压检测芯片和无线传输模块，所述胎压检测芯片、所述无线传输模块均与所述电路板电连接，所述胎压检测芯片连接于槽体的顶部并封闭槽体的开口。密封件收容于所述槽体，所述密封件抵接于所述凸肋，以使得所述密封件的外周面与所述槽体的内周壁之间形成间隙，所述密封件设有连接孔，所述连接孔连通所述通孔和所述胎压检测芯片的气压孔。
在一些可选地实施例中，所述槽体包括彼此连通的第一槽体和第二槽体，所述第一槽体位于所述槽体的顶部，并与所述外壳的腔体相连通，所述第二槽体位于所述槽体的底部。所述胎压检测芯片收容于所述第一槽体，并封闭所述第二槽体的开口，所述密封件收容于所述第二槽体，所述凸肋连接于所述第二槽体的内周壁，所述通孔处于所述第二槽体。
在一些可选地实施例中所述第二槽体的内周壁与所述密封件的外周面之间的间隙为0.2mm-0.6mm。
在一些可选地实施例中，所述凸肋包括主体部以及与所述主体部连接的导向部，所述导向部处于所述第二槽体的内周壁靠近所述第一槽体的一端。自所述第一槽体向所述第二槽体的方向，所述导向部的厚度逐渐增加。
在一些可选地实施例中，所述主体部具有朝向所述槽体的拔模面，所述拔模面的拔模角为0°-0.5°。
在一些可选地实施例中，所述凸肋的数量为四个，四个所述凸肋环绕设置于所述第二槽体的内周壁。
在一些可选地实施例中，所述胎压传感器还包括密封胶，所述密封胶分别填充于所述第二槽体的内周壁与所述密封件的外周面之间的间隙，以及所述胎压检测芯片与所述第二槽体的顶壁之间的间隙。
在一些可选地实施例中，所述密封胶的粘度为1500-4500cps。
在一些可选地实施例中，所述密封件采用硅胶制成。
根据本申请实施例的另一个方面，提供的一种胎压检测系统，包括控制器和上述所述的胎压传感器，所述胎压传感器通过所述无线传输模块与所述控制器通信连接。
本申请实施例的有益效果是：由于密封件受到生产工艺的影响会不可避免的在其外周面上产生毛刺，将密封件装配于外壳的槽体时，毛刺与槽体的内周壁相抵接会对密封件施加作用力，以使得该密封件存在自槽体脱离的趋势，这会造成密封件易装配不到位，甚至自槽体内脱离的情形。在本申请实施例中，密封件的外周面通过凸肋与槽体的内周壁之间形成间隙，密封件的毛刺可容置于该间隙内。换言之，密封件上的毛刺不再易与槽体的内周壁相抵接而对密封件施加作用力，这样，便改善了密封件与外壳装配不良的情形。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
为了更清楚地说明本申请具体实施例或现有技术中的技术方案，下面将对具体实施例或现有技术描述中所需要使用的附图作简单地介绍。在所有附图中，类似的元件或部分一般由类似的附图标记标识。附图中，各元件或部分并不一定按照实际的比例绘制。
图1为本申请实施例提供的一种胎压传感器的剖视图；
图2为图1中的第二壳体在一角度下的结构示意图；
图3为图1中的第二壳体在另一角度下的结构示意图；
图4为图3中C-C处的剖视图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。以下至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发实用新型及其应用或使用的任何限制。基于本申请中的实施例，本领域普通技术人员在没有开展创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为授权说明书的一部分。
在本申请的描述中，应当说明的是，方位词如“前、后、上、下、左、右”、“横向、竖向、垂直、水平”和“顶、底”等所指示的方位或位置关系通常是基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，在未作相反说明的情况下，这些方位词并不指示和暗示所指的装置或元件必须具有特定的方位或者以特定的方位构造和操作，因此不能理解为对本申请保护范围的限制；方位词“内、外”是指相对于各部件本身的轮廓的内外。
在本申请的描述中，应当说明的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对相应零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本申请保护范围的限制。
此外，下面所描述的本申请不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互 结合。
请参阅图1示出的示例，图1为本申请实施例提供的一种胎压传感器的结构示意图。该胎压传感器包括外壳10、胎压检测组件20和密封件30。外壳10具有腔体10a以及与腔体10a连通的槽体121，槽体121的底部设有将槽体121与外界连通的通孔122，槽体121的内周壁设有凸肋123。胎压检测组件20收容于外壳10的腔体10a，胎压检测组件20包括电路板21以及与电路板21电连接的胎压检测芯片22和无线传输模块(图未示)，胎压检测芯片22连接于槽体121的顶部并封闭槽体121的开口。密封件30收容于槽体121，密封件30抵接于凸肋123，以使得密封件30的外周面与槽体121的内周壁之间形成间隙，密封件30设有连接孔30a，连接孔30a连通通孔122和胎压检测芯片22的气压孔。
由于密封件30受到生产工艺的影响会不可避免的在其外周面上产生毛刺，将密封件30装配于外壳10的槽体121时，毛刺与槽体121的内周壁相抵接会对密封件30施加作用力，以使得该密封件30存在自槽体121脱离的趋势，这会造成密封件30易装配不到位，甚至自槽体121内脱离的情形。在本申请实施例中，密封件30的外周面通过凸肋123与槽体121的内周壁之间形成间隙，密封件30的毛刺可容置于该间隙内。换言之，密封件30上的毛刺不再易与槽体121的内周壁相抵接而对密封件30施加作用力，这样，便改善了密封件30与外壳10装配不良的情形。
该胎压传感器的具体工作过程如下：该胎压传感器可安装于轮胎的打气孔处，轮胎内的气体可通过通孔122进入胎压传感器的槽体121后被密封件30限制，直接通向胎压检测芯片22的气压孔，使胎压检测芯片22得以通过该气压孔检测轮胎内的胎温、胎压等数据而产生一轮胎状态信息并将其传输至电路板21的控制模块，控制模块会将产生的轮胎状态信息通过无线传输模块传输至监控装置。该监控装置可设置于驾驶座附近方便驾驶者查看的位置，也可与车厂搭配整合于行车电脑中并直接显示于车辆的仪表板上，使驾驶者能够随时得知轮胎的状态是否异常。接下来，结合附图所例示的对外壳10的具体结构展开说明。
对于上述外壳10，请结合图2一并参阅图1示出的示例，图2为图1中第一壳体11的结构示意图。该外壳10包括第一壳体11和第二壳体12。第一壳体11与第二壳体12连接并围合形成上述腔体10a。
具体而言，第二壳体12设有贯穿第二壳体12靠近腔体10a的表面和远离腔体10a的表面的通孔122，第二壳体12靠近腔体10a的表面朝第一壳体11的方向凸伸形成凸台124，凸台124设有槽体121，该槽体121包括彼此连通的第一槽体121a和第二槽体121b。第一槽体121a位于槽体121靠近凸台124的顶部一端，并与外壳10的腔体10a相连通。第一槽体121a与胎压检测芯片22的形状相适配，第一槽体121a用于容置胎压检测芯片22。第二槽体121b位于第二壳体12靠近腔体10a的表面一端，第二槽体121b用于容置密封件30，第二槽体121b的内周壁朝向通孔122的中心轴线方向部分伸出形成上述凸肋123。其中，通孔122位于第二槽体121b内，该通孔122用于将第二槽体121b与外界连通。可以理解的是，通孔122的形状不作具体限定，例如，在本申请实施例中，通孔122呈圆形、正方形、矩形等多边形的棱柱孔。同理，密封件30的连接孔30a亦不作具体限定。
进一步地，沿通孔122的中心轴线方向，第二槽体121b的横截面积逐渐减小。应当说明的是，在本申请实施例中，第一壳体11和第二壳体12均采用尼龙加玻璃纤维的材料制成。而受到加工设备的生产工艺影响，第二壳体12的第二槽体121b需存在拔模角度以便于顺利出模，即第二槽体121b靠近第一槽体121a的一侧的横截面积小于第二槽体121b靠近通孔122的一侧的横截面积。此外，密封件30需与第二壳体12进行过盈配合，以减少密封件30因为振动、冲击等原因出现连接失效的情形，因此，第二槽体121b靠近第一槽体121a的一侧的横截面积与密封件30的横截面积相等。这样，将密封件30安装于第二槽体121b时，密封件30可对凸肋123持续施加作用力，以起到定位作用。
进一步地，凸肋123的数量为四个，四个凸肋123绕通孔122的轴线方向环绕设置于第二槽体121b的内周壁。这样，密封件30可均匀地受到四个凸肋123的作用力，此时，四个凸肋123可起到定位作用，以确保密封件30居中而不易偏斜。可以理解的是，凸肋123的数量不限于此，可根据实际使用需求进行适应性调整，例如，凸肋123的数量亦可为三个、五个或五个以上，只需满足密封件30的外周面与第二槽体121b的外周壁存在间隙即可。除此之外，四个凸台124与密封件30相贴合的总面积与密封件30的外周面的面积的比值为5％-50％。较优地，比值为10％。如此设置，使得第二壳体12对密封件30既可以具有良好的固定效果，也利于节省制造成本。
请结合图4一并参阅图3或图2示出的示例，图3为图1中第一壳体11的另一视角下的结构示意图，图4为图3中C-C处的剖视图。该凸肋123包括主体部1231以及与主体部1231连接的导向部1232。导向部1232位于第二槽体121b靠近第一槽体121a的一端，自第一槽体121a向第二槽体121b的方向观察，导向部1232的厚度逐渐增加。由于密封件30的横截面积与第二槽体121b靠近通孔122的一侧的横截面积相等，对凸肋123靠近第一槽体121a的一端进行倒角处理，密封件30会受到导向部1232的导向作用而更易与凸肋123的主体部1231的相抵接。
进一步地，主体部1231具有朝向通孔122的中心轴线方向的拔模面，该拔模面的拔模角满足0°-0.5°，基于此，在保证密封件30的装配效果的同时，也利于凸肋123的正常出模。
为了改善胎压检测芯片22与轮胎内部的水汽接触被腐蚀的情形，进一步地，该胎压传感器还包括密封胶40。请继续参阅图1，该密封胶40分别填充于第二槽体121b的内周壁和密封件30的外周面之间的间隙，以及胎压检测芯片22与第二槽体121b的顶壁之间的间隙。示例性地，密封胶40为柔性密封胶，该柔性密封胶的粘度为1500-4500cps，在该粘度范围内，液体的柔性密封胶的流动性可以满足密封件30的封装需要，以保证封装后的可靠性，降低液态的柔性密封胶的凝固时间。
接下来，结合胎压传感器的装配过程对本申请进行说明。在进行封装时，沿通孔122的中心轴线方向，先将密封件30插入第二槽体121b，密封件30与凸肋123相抵接，然后再往第二槽体121b内灌入密封胶40，使密封胶40填充密封件30和第二槽体121b的内周壁之间的间隙内。密封胶40灌入完成后，胎压检测芯片22插入第一槽体121a并与密封件30挤压接触。在胎压检测芯片22的挤压作用下，密封件30的外周面与第一槽体121a的内周壁之间的间隙变小，使得该间隙内的密封胶40溢出到胎压检测芯片22与第二槽体121b顶部之间的间隙内，当密封胶40凝固后，则胎压检测芯片22则会密封固定在第一槽体121a内，封装完成。
在一些实施例中，第二槽体121b的内周壁与密封件30的外周面之间的间隙为0.2mm-0.6mm。在该间隙范围内，可以保证封装后胎压检测芯片22与第二壳体12之间具有较好的密封性，同时也兼顾密封件30的毛刺需占用的空间。可以理解的是，在另一些实施例中，第二槽体121b的内周壁与密封件30的外周面之间的间隙亦可大于0.6mm。
在一些实施例中，密封件30采用硅胶制成，例如该硅胶为有机硅胶和聚氨酯胶。
基于同一技术构思，本申请还提供一种胎压检测系统，包括控制器和上述所述的胎压传感器，胎压传感器可通过无线传输模块与控制器通信连接。关于胎压传感器的具体结构参阅上述描述即可，在此不再一一赘述。
以上所述仅为本申请的实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (10)

  1. 一种胎压传感器，包括：
    外壳，具有腔体以及与所述腔体连通的槽体，所述槽体设有通孔，所述通孔用于将所述槽体与外界连通，所述槽体的内周壁设有凸肋；
    胎压检测组件，收容于所述腔体，所述胎压检测组件包括电路板、胎压检测芯片和无线传输模块，所述胎压检测芯片、所述无线传输模块均与所述电路板电连接，所述胎压检测芯片连接于槽体的顶部并封闭所述槽体的开口；以及
    密封件，收容于所述槽体，所述密封件抵接于所述凸肋，以使得所述密封件的外周面与所述槽体的内周壁之间形成间隙，所述密封件设有连接孔，所述连接孔连通所述通孔和所述胎压检测芯片的气压孔。
  2. 根据权利要求1所述的胎压传感器，所述槽体包括彼此连通的第一槽体和第二槽体，所述第一槽体位于所述槽体的顶部，并与所述外壳的腔体相连通，所述第二槽体位于所述槽体的底部；
    所述胎压检测芯片收容于所述第一槽体，并封闭所述第二槽体的开口，所述密封件收容于所述第二槽体，所述凸肋连接于所述第二槽体的内周壁，所述通孔处于所述第二槽体。
  3. 根据权利要求2所述的胎压传感器，所述第二槽体的内周壁与所述密封件的外周面之间的间隙为0.2mm-0.6mm。
  4. 根据权利要求2所述的胎压传感器，所述凸肋包括主体部以及与所述主体部连接的导向部，所述导向部处于所述第二槽体的内周壁靠近所述第一槽体的一端；
    自所述第一槽体向所述第二槽体的方向，所述导向部的厚度逐渐增加。
  5. 根据权利要求4所述的胎压传感器，所述主体部具有朝向所述槽体的拔模面，所述拔模面的拔模角为0°-0.5°。
  6. 根据权利要求2所述的胎压传感器，所述凸肋的数量为四个，四个所述凸肋环绕设置于所述第二槽体的内周壁。
  7. 根据权利要求2-6任意一项所述的胎压传感器，所述胎压传感器还包括密封胶，所述密封胶分别填充于所述第二槽体的内周壁与所述密封件的外周面之间的间隙，以及所述胎压检测芯片与所述第二槽体的顶壁之间的间隙。
  8. 根据权利要求7所述的胎压传感器，所述密封胶的粘度为1500-4500cps。
  9. 根据权利要求1-6任意一项所述的胎压传感器，所述密封件采用硅胶制成。
  10. 一种胎压检测系统，包括控制器和如权利要求1-9任意一项所述的胎压传感器，所述胎压传感 器通过所述无线传输模块与所述控制器通信连接。
PCT/CN2023/091331 2022-05-06 2023-04-27 胎压传感器以及胎压检测系统 Ceased WO2023213231A1 (zh)

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