CN2095791U

CN2095791U - Air pressure displaying device for tyre of bicycle and motorcycle

Info

Publication number: CN2095791U
Application number: CN 90224550
Authority: CN
Inventors: 王放明
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-12-15
Filing date: 1990-12-15
Publication date: 1992-02-12

Abstract

The utility model discloses an air pressure displaying device for tyre of bicycle and motorcycle, particularly a displaying device of indirect displaying air pressure used for the air pressure displaying of the vehicle tyres of the bicycles and other minitype vehicles, which belongs to an air pressure displaying device. The air pressure displaying device for tyre of bicycle and motorcycle solves the problem of the indirect air pressure testing under the circumstance that the compressed air in the tyre is not touched. The air pressure displaying device for tyre of bicycle and motorcycle is characterized in that a metallic test probe pushed by a spring is pressed into the exterior surface of the tyre without damaging the exterior surface of the tyre, and the air pressure value is tested indirectly by the depth of pressing; the pressed depth is displayed by a graduated disk through the pointers, and conversed into air pressure valve. The air pressure displaying device for tyre of bicycle and motorcycle is used to display the air pressure value when the bicycles and other light motor vehicles being inflated, and test the air pressure in the vehicle tyres at ordinary times to decide whether the vehicle tyres need to be inflated.

Description

Air pressure displaying device for tyre of bicycle and motorcycle

The utility model belongs to a kind of pneumatic indicator, particularly a kind of compact car tyre pressures such as bicycle, motor bike telltale of demonstration indirectly that is used for.

Generally adopt air-pressure gauge to show pressure gas air pressure now both at home and abroad, generally can be used on Oversize vehicle (as automobile) tire pressure and show.The air-pressure gauge structure that is now adopted is complicated, and when the measuring wheel air pressure, need connect with the high pressure gas in the tire, belongs to direct measurement.As showing that with this air-pressure gauge bicycle, motorcycle air pressure have following shortcoming:

1. to redesign bicycle or cycle tyre valve, enable to join with air-pressure gauge.

2. the air-pressure gauge easy break-down is fragile.

3. cost an arm and a leg.

4. installing wastes time and energy.Use, carry inconvenience, can not use at any time.

5. can not indirectly testing air pressure.

Also do not occur at present showing bicycle, motor bike etc. the compact car tire pressure, simple, indirect, easy to use, the failure-free pneumatic indicator.Usual people generally estimate air pressure by rule of thumb when giving bicycle, cycle tyre inflation.Like this, sometimes, the air pressure of inflating is too high to make the tire explosion; Sometimes the air pressure of inflating again is too low, and tire life is reduced.At ordinary times, people estimate by rule of thumb also whether tire needs inflation, and shortage can show the instrument of tyre pressure indirectly.

Task of the present utility model provides a kind of small-sized, failure-free, long-life, simple, cheap, easy to carry and use and can quantitatively show the device of bicycle, motorcycle air pressure indirectly.When surveying air pressure; do not need bicycle, motor bike are done change on any structure; not with tire in gas connect; can at any time use; when inflating, show tyre pressure to play; inspection vehicle air pressure size can be used at ordinary times again at any time need to determine whether inflation, and the protection tire prolongs the tire life-span.This device volume is little, can weigh down with car key and be dissolved in one, is easy to carry.

Task of the present utility model is finished as follows: the more blunt metallic test probe of head that a spring is promoted is pressed into tire smooth in appearance face, and probe carries out appropriate design, does not damage the tire appearance.Decide the air pressure size with the depth size that can be pressed into.When tire pressure was big, tire outside face tension force was bigger, so the degree of depth that probe can be pressed into is just little; Otherwise, air pressure hour, tire outside face tension force is little, the degree of depth that probe can be pressed into just greatly.The depth size that is pressed into is by showing with probe bonded assembly read out instrument, and is converted into the standard pressure value simultaneously.

Adopt the following examples, simple in structure, cost is low, and is easy to use.

Below with reference to accompanying drawing.

Accompanying drawing is the assembly drowing of a kind of embodiment.

With reference to accompanying drawing, claw 1, claw 8 are clipped in respectively tire two outsides, and two pawls connect by pin 10 Connect. Torsion spring 2 is on pin 10, and two spring pawls ride over respectively on claw 1, the claw 8, can rotate around pin 10, and its spring torsion is tightly embraced in tire two outsides claw 1 and claw 8. Test probe 7 is contained in the aperture of claw 8, can do the motion of vertical tire outer surface, and its head contacts with tire outside even surface, and its tail end couples together with pin 6 and pointer 4, and pointer 4 can be around bearing pin 5 rotations. Torsion spring 3 is wrapped on the pin 5, and a pawl of torsion spring rides on the pointer, and another pawl rides on the claw 8. Torsion spring power makes pointer clockwise rotate (such as figure), and pointer drives test probe and is pressed into outer surface of tire. Simultaneously, the degree of depth that test probe is pressed into also will by the pointer transmission, be shown by the dial 9 that arranges on the claw 8, and be converted into the standard pressure value. Probe diameter is 1～2mm, and head is ball, reliably is as the criterion not damage the tire outer surface and to measure. When popping one's head in the drive hand motion for making stuck phenomenon does not take place, pointer can slide pin 6 adopting the elongated hole structure with the probe junction in elongated hole. For guarantee that claw 8 does not break away from and the contacting of tire when test probe is pressed into the tire outer surface, so that test probe 7 and pointer 4 have definite relative motion for claw 8, design torsion spring 2 and torsion spring 3, make claw to the clamping force of tire greater than the pressing-in force of probe to tire.

The utility model has the advantages that the part number is few, reliable operation, the life-span is long, and is simple in structure, and volume is little, and cost is low, can do the indirect measurement of air pressure. When combining with the car key pendant, easy to carry, easy to use, the protection tire has social benefit.

Claims

1, bicycle motorcycle pneumatic indicator of being formed by claw 1 and claw 8, test probe 7, pointer 4, torsion spring 2, torsion spring 3, calibrated disc 9.It is characterized in that: test probe 7 is set on claw 8.