Radial holding fastening piece and tire pressure detection device using the same
A tire pressure detection and pressure technology, which is applied in the direction of measuring device, inflation gas pressure measurement, fluid pressure measurement, etc., can solve the problems of not being able to maintain reliable support of the bottom surface of the wheel hub, and cannot guarantee reliable support of the bottom surface of the wheel hub, etc., to achieve convenient fastening operation, The effect of reliable and secure placement
Inactive Publication Date: 2012-12-12
深圳市兴班建筑工程有限公司
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Problems solved by technology
However, because the structure of the existing air nozzle fasteners does not have a radial pressing effect, even if the tire pressure detection device is installed close to the bottom surface of the wheel hub, it cannot be guaranteed to be reliably supported by the bottom surface of the wheel hub after axial fastening, and it cannot be maintained after repeated cycles. Reliable support from the bottom surface of the wheel hub even after bumps
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Embodiment 1
[0014] This embodiment is a tire pressure detection device (TPMS) that uses radial compression fasteners, and its basic structure is as follows figure 1 As shown, it includes a box 1 in which a pressure sensing and wireless transmission circuit is arranged, and an air nozzle 2 integrated with a radial pressing fastener. The box 1 has a side wall 1-1 and a base 1-2 opposite to the inner side and the inner bottom of the hub 3, respectively. The side wall 1-1 has an air nozzle hole opposite to the hub air nozzle hole.
[0015] Combine figure 2 It can be seen that the box body 1 has a circular arc bottom recess, and the inner circular arc surface of the circular arc bottom recess on the base 1-2 is a radial pressing surface. The air nozzle 2 has a screw section 2-1 matched with the nut 4 and an end 2-2 with a diameter larger than the outer diameter of the screw, and the center of the screw section is an air-filling hole. The center O of the end 2-2 deviates from the center O'of th...
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The invention relates to a radial holding fastening piece, and simultaneously relates to a tire pressure detection device using the fastening piece. The fastening piece comprises a threaded rod section and an end socket, wherein the threaded rod section is matched with a nut, diameter of the end socket is more than external diameter of a threaded rod, and a centre of circle of the end socket deviates from that of the threaded rod; the minimum distance from the centre of circle of the threaded rod to a radial holding surface is more than radius of the threaded rod and less than sum of the radius of the end socket and an eccentric throw of the centre of circle of the end socket deviated from the centre of circle of the threaded rod. The eccentric end socket of the invention generates a holding force acting on the radial holding surface so as to naturally generate the needed radial holding function while fastening axially.
Description
Technical field [0001] The invention relates to a threaded fastener, in particular to a radial pressing fastener, and also relates to a tire pressure detecting device using the fastener. Background technique [0002] As we all know, common fasteners such as bolts and screws can only use threads to generate axial tightening force. However, some special occasions require not only axial tightening, but also radial pressing and locking, such as application This is the case for the hidden tire pressure detector disclosed in the Chinese Patent Application No. 99106744.4. The sensing and wireless transmission circuits of this type of tire pressure detection device are fixed in the car tire, and the fasteners used are organically integrated with the air nozzle. In order to ensure stable operation of the pressure sensing and wireless transmission circuit under the rotating and turbulent state, the detection device fixed on the inner side of the hub with the help of air nozzle fasteners n...
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IPC IPC(8): G01L17/00
Inventor 罗学云
Owner 深圳市兴班建筑工程有限公司