Locomotive fuel sensor sealing structure

Abstract

The utility model discloses a locomotive fuel sensor sealing structure, which is characterized by comprising an oil tank, a sensor mounting table arranged on the oil tank, a sensor penetrating port and a bolt connecting hole arranged on the sensor mounting table, a rubber pad arranged on the sensor mounting table, and a sensor arranged above the rubber pad, a mounting plate of the sensor is provided with a locking hole, the outer side of the sensor is provided with a pan head step bolt, the pan head step bolt is sleeved with an O-shaped sealing ring, the pan head step bolt and the bolt connecting hole are locked in a matched mode, and the upper end face and the lower end face of the rubber pad are provided with protruding sealing ribs. The sealing ribs are annularly distributed on the peripheries of the corresponding sensor via hole and the mounting via hole and the edge of the end face of the rubber pad. The utility model has the beneficial effects that the sealing effect is improved, the sealing ring and the sealing gasket are prevented from being damaged due to excessive extrusion to cause sealing failure, the bolt connection torque is prevented from being reduced to cause failure, and the structure is simple, easy to manufacture, durable, reliable and convenient to disassemble and maintain.

Description

Technical Field

[0001] The utility model relates to the field of motorcycles, in particular to a sealing structure of a fuel sensor for a motorcycle. Background Art

[0002] At present, the sealing structure of the connection between the locomotive fuel sensor and the fuel tank is a flat sealing method of a rubber pad, and the rubber pad is assembled between the fuel sensor and the fuel tank for sealing. The fuel sensor, rubber pad and fuel tank are connected and fastened by bolts. After the rubber pad is subjected to the tightening torque applied by the bolts to the fuel sensor, the rubber pad has no limiting structure to control the compression amount. The rubber pad is squeezed and deformed, causing the compression amount of the rubber pad to exceed the compression limit, resulting in permanent deformation of the rubber and failure or damage of the resilience. The rubber pad cannot support the tightening force of the bolts, causing the torque to drop, and the tank seal to fail permanently, resulting in fuel leakage. Fuel leakage in the fuel tank increases the safety risk during the locomotive driving process. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a sealing structure for a locomotive fuel sensor, which solves the problem of sealing oil leakage between the fuel sensor and the fuel tank.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A locomotive fuel sensor sealing structure, characterized in that it includes a fuel tank, a sensor mounting platform is provided on the fuel tank, a sensor insertion port and a bolt connection hole are provided on the sensor mounting platform, a rubber pad is arranged on the sensor mounting platform, a sensor is arranged above the rubber pad, a locking hole is provided on the mounting plate of the sensor, a pan head step bolt is provided on the outer side of the sensor, an O-ring is sleeved on the pan head step bolt, the pan head step bolt is locked in cooperation with the bolt connection hole, a sensor through hole and a mounting through hole are provided on the rubber pad, and the upper and lower end faces of the rubber pad are provided with raised sealing ribs, and the sealing ribs are distributed in a ring shape at the outer periphery corresponding to the sensor through hole, the mounting through hole and the end face edge position of the rubber pad.

[0006] Furthermore, the pan head step bolt includes a pan head portion, an optical axis portion, and a threaded portion, wherein the threaded portion cooperates with the bolt connecting hole, the O-ring is sleeved on the optical axis portion, and a ring placement groove is provided at the connection between the optical axis portion and the pan head portion.

[0007] Furthermore, the end surface of the optical axis portion is used to abut against and limit the end surface of the sensor mounting platform.

[0008] The beneficial effects of the utility model include: improving the sealing effect, preventing the sealing ring and the sealing gasket from being damaged due to excessive extrusion and causing sealing failure, and preventing the bolt connection from failing due to torque reduction. The structure is simple and easy to manufacture, durable and reliable, and easy to disassemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 This is a schematic diagram of the rubber pad structure of the utility model;

[0011] Figure 3 It is a schematic diagram of the structure of a pan head step bolt of the utility model. DETAILED DESCRIPTION

[0012] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0013] A kind of Figure 1-3 The locomotive fuel sensor sealing structure shown in the figure includes a fuel tank 1, a sensor mounting platform 2 is provided on the fuel tank 1, a sensor through-port 3 and a bolt connection hole 4 are provided on the sensor mounting platform 2, a rubber pad 5 is provided on the sensor mounting platform 2, a sensor 6 is provided above the rubber pad 5, and a locking hole is provided on the mounting plate of the sensor 6. A pan head step bolt 7 is provided on the outer side of the sensor 6, an O-type sealing ring 8 is sleeved on the pan head step bolt 7, and the pan head step bolt 7 is locked in cooperation with the bolt connection hole 4.

[0014] The rubber pad 5 is provided with a sensor through hole 51 and a mounting through hole 52. The upper and lower end surfaces of the rubber pad 5 are provided with raised sealing ribs 53. The sealing ribs 53 are distributed in an annular shape at the outer periphery of the corresponding sensor through hole 51, the mounting through hole 52 and the edge of the end surface of the rubber pad 5. The utility model designs a linear sealing method in which a plurality of annular semicircular arc-shaped sealing rings are vulcanized into one on the front and back surfaces of the rubber pad. The rubber pad is assembled in the middle position between the oil tank and the sensor to form multiple linear seals with the oil tank and the sensor respectively.

[0015] The pan head stepped bolt 7 comprises a pan head portion 71, a smooth axis portion 72, and a threaded portion 73, wherein the threaded portion 73 is matched with the bolt connection hole 4, and an O-ring 8 is sleeved on the smooth axis portion 72, and an annular placement groove 74 is provided at the connection between the smooth axis portion 72 and the pan head portion 71. The O-ring is assembled between the sensor and the large pan head surface of the bolt to form a linear seal to prevent the fuel flowing through the bolt hole.

[0016] The end face of the optical axis portion 72 is used to abut against the end face of the sensor mounting platform 2 for limiting position. The cylindrical step surface of the pan head bolt is positioned on the surface of the tank assembly screw hole after passing through the O-shaped rubber ring, the sensor and the rubber pad in sequence. The step height of the pan head bolt is designed and positioned according to the compression rate of the rubber pad and the O-shaped rubber ring to control the compression amount of the rubber and solve the problem of failure due to the decrease of the bolt tightening torque; ensure the reliable compression rate of the rubber and solve the problem of oil leakage between the fuel sensor and the tank.

[0017] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A sealing structure for a locomotive fuel sensor, characterized in that: The invention comprises an oil tank (1), wherein the oil tank (1) is provided with a sensor mounting platform (2), wherein the sensor mounting platform (2) is provided with a sensor through-port (3) and a bolt connection hole (4), wherein a rubber pad (5) is arranged on the sensor mounting platform (2), wherein a sensor (6) is arranged above the rubber pad (5), wherein a locking hole is arranged on the mounting plate of the sensor (6), wherein a pan head step bolt (7) is arranged on the outer side of the sensor (6), wherein an O-type sealing ring (8) is sleeved on the pan head step bolt (7), wherein the pan head step bolt (7) is locked in cooperation with the bolt connection hole (4), wherein the rubber pad (5) is provided with a sensor through-hole (51) and a mounting through-hole (52), wherein the upper and lower end surfaces of the rubber pad (5) are provided with raised sealing ribs (53), wherein the sealing ribs (53) are distributed in an annular manner at the outer periphery of the corresponding sensor through-hole (51), the mounting through-hole (52) and the end surface edge position of the rubber pad (5).

2. A locomotive fuel sensor sealing structure according to claim 1, characterized in that: The pan head stepped bolt (7) comprises a pan head portion (71), an optical axis portion (72), and a threaded portion (73), wherein the threaded portion (73) cooperates with the bolt connection hole (4), the O-ring (8) is sleeved on the optical axis portion (72), and a ring-shaped placement groove (74) is provided at the connection between the optical axis portion (72) and the pan head portion (71).

3. A sealing structure for a locomotive fuel sensor according to claim 2, characterized in that: The end surface of the optical axis portion (72) is used for abutting and limiting against the end surface of the sensor mounting platform (2).

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