Cap structure for a radiator used in vehicle

A cap structure for a radiator used in vehicle is disclosed. The cap includes a main cap body, a connector shaft, and a leak-seal seat. The main cap body includes a metallic cap body and a heat-isolation covering body joined together using screw as a body. The connector shaft is screwed onto the leak-seal seat, and the connector shaft passes through the through hole of a metallic sleeve mounted on the heat-isolation covering body. The side of the protruded rim of the connector shaft urges the end face of the sleeve and a spring is used to mount the connector shaft onto the main cap body. The heat-isolation covering body with a thickness is mounted onto the metallic cap body and two screws are used to lock the metallic cap body onto the heat-isolation covering body to form a unit, and the end side of the covering body is provided with slip-proof teeth and the metallic sleeve is mounted onto the center circular hole.

BACKGROUND OF THE INVENTION

(a) Technical Field of the Invention

The present invention relates to cap structure, and in particular, to a cap structure for inspection of water pressure leakage within the radiator of a vehicle.

(b) Brief Description of the Prior Art

Taiwanese Utility Model application no. 90217830 entitled “Water Pressure Leakage Inspection Cap Structure” (shown inFIG. 1) discloses a cap structure having a mounting block to increase the contact surface of the screw shaft and a sealing cap, the leakage proof member at the bottom of the screw shaft is effectively mounted to seal the mouth of the radiator to allow accuracy of inspecting water pressure thereof. The drawback of this conventional cap is that while turning the cap, the upper end of the sealing cover is too long, and therefore the exertion of a force is difficult. Further, the surface of the cap is too thin, this makes gripping thereof a problem. The addition of a mounting block causes fabrication process laborious. Accordingly, it is an object of the present invention to provide a cap structure for a radiator used in vehicle which mitigates the drawbacks mentioned above.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a cap structure for a radiator used in vehicle comprising a main cap body, a connector shaft, and a leak-seal seat, wherein the main cap includes a metallic cap body and a heat-isolation covering body joined together with screw as a body, and the connector shaft is screwed onto the leak-seal seat, and passes through the through hole of a metallic sleeve mounted on the heat-isolation covering body, and the side of the protruded rim of the connector shaft urges the end face of the sleeve and a spring is used to mount the connector shaft onto the main cap body, characterized in that the heat-isolation covering body with a thickness and with heat-isolation property is mounted onto the metallic cap body and two screws are used to lock the metallic cap body onto the heat-isolation covering body to form an unit, and the end side of the covering body is provided with slip-proof teeth and the metallic sleeve is mounted onto the center circular hole, whereby, the mounting of the metallic cap body with the heat-isolation covering body is enhanced by the metallic sleeve mounted with the connector shaft to the leak-seal seat.

Yet still another object of the present invention is to provide a cap structure for a radiator used in vehicle, wherein the cap body is provided with a gripping face with a larger “hand-gripping surface” facilitating holding by the user.

Yet a further object of the present invention is to provide a cap structure for a radiator used in vehicle, wherein the heat-isolation covering body is installed at the recess at the bottom of the metallic cap body, and the connector shaft at the center of the cap body will not bias and the bottom end of the leak-seal seat seals the mouth of the radiator.

Still another object of the present invention is to provide a cap structure for a radiator used in vehicle, wherein the top end of the connector shaft will not urge the palm of the hand of the user.

Still a further object of the present invention is to provide a cap structure for a radiator used in vehicle, wherein the larger and thicker surface provides better grip so that there will not slip when the cap is rotated.

A further object of the present invention is to provide a cap structure for a radiator used in vehicle, wherein the end face of the metallic cap is covered with a heat-isolation covering body having slip-proof property, the covering body is directly formed with the metallic cap body.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring toFIGS. 3,4, and5, there is shown a cap structure for a radiator used in vehicle, comprising a main cap body A (including a metallic cap body1and a non-metallic heat-isolation covering body2), a connector shaft3and a leak-seal plate4and a leak-seal pad5, a spring6. The center of the metallic cap body1is a circular hole10, and the surrounding of the circular hale10is provided with two symmetrical holes11.

The heat-isolation covering body2has a bottom formed with a recess21and the top of the metallic cap body1is configured to fit into the recess21. The bottom face of the recess21is provided with two screw holes22corresponding to the two holes11of the metallic cap body1. The center circular hole20is mounted with a metallic sleeve7. Further, the circumferential edge of the non-metallic heat-isolation covering body2is provided with slip-proof teeth23.

The shaft center of the connector shaft3has a through hole30and the upper end of the shaft3has a quick connector31. The intermediate portion33of the connector shaft3is provided with a flange32with an appropriate diameter. The connector shaft3has a threaded lower end34.

The leak-seal plate4is a circular member. The upper side of the leak-seal plate4has a protruded seat41, and the center of the leak-seal plate4has a screw hole42. The center of the upper end of the protruded seat41has a through hole40. The upper portion of the through hole40is larger than the lower portion of the through hole40. The upper portion of the through hole40is threaded into a screw hole42to engage with the threaded lower end34of the connector shaft3. The through hole40and the through hole30of the connector shaft are aligned with each other. Further, the leak-seal pad5is mounted at a recessed seat43at the bottom end of the leak-seal seat4to form as one unit.

In accordance with the present invention, the heat-isolation covering body2and the top end of the metallic cap body1are first mounted and screws8are passed through the two holes11to engage the recess21of the covering body2with the metallic cap body1. The thickness of the heat-isolation covering body2and the thickness of the metallic cap body1are the same so as to increase the contact surface area of the threaded lower end33of the connector shaft3. After that, the connector shaft3is passed through the circular hole of the metallic sleeve7, the lower end shaft diameter33of the connector shaft3is exactly the same as the hole diameter of the circular hole70of the metallic sleeve7, and the flange32of the connector shaft3urges the top face of the sleeve7of the heat-isolation covering body2, and the connector shaft3is inserted with a spring6. The center screw hole42is locked to the treaded lower end34at the bottom end of the connector shaft3, and the spring6causes the connector shaft3and the leak-seal plate5and the leak-seal pad6to be urged at the main cap body A to move up and down axially.

As shown inFIG. 6, the metallic cap body1is provided with a heat-isolation covering body2of large surface area allowing hand-gripping and the covering body2has slip-proof and heat-isolation properties. Thus, when the cap is held and rotated onto the mouth of the radiator, the gripping is strong which ensures tight seal to the mouth of the radiator.

In addition, the center circular hole70of the center sleeve7allows positioning of the shaft diameter of the connector shaft3, and the leak-seal pad6is urged by the connector shaft3and will not move, the sealing of the cap to the mouth of the radiator is effective. Due to the thicker heat-isolation covering body2mounted onto the metallic cap body1, it can cover one section of the quick connector31at the top end of the connector shaft3so that the end head exposed out of the connector shaft3becomes short. Thus, when the cap body is rotated, the top end of the quick connector31will not urge the palm of the user.

There are slip-proof teeth23provided at the lateral end of the covering body2, and this will prevent slipping of the gripping of the palm.

Referring toFIG. 6, the main cap body A is mounted onto the mouth100of the radiator. To inspect whether there is leakage in water pressure, a pump200is connected to the quick connector seat201to pump air into the water tank of the radiator. Thus, leakage if any of the tank could be inspected.