CN2059885U - Anti-theft dirt-removing plug screw for oil tank and special spanner - Google Patents

Abstract

The utility model relates to an anti-theft dirt removing plug screw for an oil tank and a special spanner, which is especially suitable for the security protection of dirt removing and oil storage for the oil tank of a vehicle or other motor vehicles and engineering machines. The dirt removing plug screw of the utility model is composed of two parts which are a plug screw and a head section. The head section is of semicircle head shape, and is provided with an inner polygon hole in the middle. The special spanner is of crank arm shape, and the head section of the crank arm is of polygon and is matched with the shape and size of the inner polygon hole of the dirt removing plug screw. The polygon can be triangular, square shape, five-angle shape, hexagon, etc. Each shape can have various dimensions. The utility model has the advantages of theft prevention, convenient use, reliability and low cost, and can replace the dirt removing plug screw of the exiting oil tank.

Description

Anti-theft dirt-removing plug screw for oil tank and special spanner

The utility model belongs to fuel tank mechanical type drain plug, is specially adapted to automobile or other self-propelled vehiclees and the blowdown of construction machinery and equipment fuel tank and oil storage safety guard-safeguard.

At present, its head of fuel tank drain plug on automobile and other power actuated vehicles generally is outer-hexagonal shape, just can turn plug screw with general utility wrench, so the incident of stolen often has generation behind this plug screw by turning on.In Chinese patent, a kind of drain plug with lock is arranged, though can play antitheft effect more effectively, but exist deadly defect, because plug screw is loaded on the fuel tank bottom, the very easy silt that is splash by vehicle itself stops up lockhole, cause key to be put to advance, in addition, because the fuel tank drain plug is also seldom opened, pellet shot from a slingshot, spring easy-to-rust in the lock cause not opening.

The purpose of this utility model overcomes the problem that existing drain plug exists with regard to being intended to, and provides a kind of simple in structure, and has both opened conveniently, again can theft-proof Security for fuel tank drain plug and special wrench thereof.

Security for fuel tank drain plug of the present utility model is made up of bolt, head two parts, and its outstanding characteristics are that its head is the semicircle capitiform, and the centre has interior polygonal holes.Should interior polygon can be triangle, quadrangle, pentagon, hexagon etc.All can make multiple dimensions for each polygon.Open the utility model drain plug and adopt the special wrench supporting with it, this special wrench is a connecting lever shape, and its head is and aforementioned drain plug shape.The outer polygon that size matches.Be further described below in conjunction with accompanying drawing.

Fig. 1 is the front elevation of drain plug of the present utility model.

Fig. 2 is the birds-eye view of drain plug of the present utility model.

Fig. 3 is the front elevation of special wrench of the present utility model.

Fig. 4 is the A-A section-drawing of Fig. 3.

Fig. 1,2,3,4 has provided an embodiment of the present utility model, positive pentagon hole in the head of antitheft drain plug has in this embodiment, and the connecting lever shape special wrench supporting with it, its head is outer positive pentagon, size, shape are corresponding with aforementioned drain plug.Drain plug of the present utility model and special wrench all can carry out plating zinc on surface, or the PROCESS FOR TREATMENT such as a back orchid, or chromium plating of quenching, with rust protection.

The utlity model has following advantage: (1) drain plug head is the semicircle head, general general utility wrench and pipe vice can't turn, and special-purpose spanner is to rest in this staff of driver, and the interior polygonal holes of the head of drain plug can be multiple kind and sizes specification, special-purpose spanner is corresponding with it, in fact play the effect of approximate lock, can prevent more effectively that beyond the driver other people from opening drain plug, plays anti-theft function. (2) the utility model is easy to use, reliable, does not exist because of silt to stop up or motionless problem is twisted in corrosion own. (3) easy to manufacture, cost is low, especially has the higher ratio of performance to price. (4) this drain plug tailing screw flight is with at present domestic all kinds of automotive oil tanks are identical, is convenient to change and do not cause waste.

Claims (4)

1, a kind of Security for fuel tank drain plug is made up of bolt and head two parts, and the head that it is characterized in that it is the semicircle capitiform, and the centre has interior polygonal holes.

2, Security for fuel tank drain plug according to claim 1 is characterized in that aforementioned interior polygonal holes, can be interior triangle, quadrangle, pentagon, hexagon etc.

3, Security for fuel tank drain plug according to claim 2 is characterized in that aforesaid every kind of polygonal holes all can make multiple dimensions.

4, be exclusively used in the special wrench of opening aforementioned Security for fuel tank drain plug, it is characterized in that this spanner is a connecting lever shape, the outer polygon that its head matches with drain plug shape, size.