Improved structure of electric mechanism

Abstract

The utility model discloses an improved structure of an electric mechanism, which comprises a shell and a cover body, the cover body can be installed at an opening of the shell through a bolt, a two-stage sealing structure is arranged at the opening of the shell, screw holes are arranged at four corners of the opening of the shell, and the screw holes are connected with the cover body. The first-stage sealing structure surrounds the edge of the end face of the open end of the shell, the second-stage sealing structure surrounds a circular opening in the right side of the center of the end face of the open end of the shell, and a plurality of reinforcing screw holes are formed in the circular opening in the end face of the open end of the shell in a surrounding mode. The sealing effect between the shell and the cover body is enhanced, and a groove in the cover body in an existing mechanism is improved to be of an inclined face structure so as to avoid water accumulation. The improved structure of the electric mechanism provided by the utility model has the effects of ensuring that the stress is balanced when the shell and the cover body are mounted and improving the sealing capability.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric mechanism technical field especially relates to an improved structure of electric mechanism. BACKGROUND

[0002] Electric mechanism provides power for the electric ball valve of the aircraft fuel system, can provide in-place feedback signal, mechanical indication and mechanical limiting function, is mainly composed of casing, motor assembly, worm and gear assembly, output shaft assembly, circuit board assembly and electric connector etc., electric mechanism uses on the airplane, when the airplane is pulled up, lands or encounters airflow and causes the airplane to be tossed, will form certain vibration impact to the product, thereby makes certain contact surface produce certain gap, further causes the air and fuel vapor in the environment to enter the inside of casing from the gap, the working environment temperature of electric mechanism is -55 DEG C ~ 100 DEG C, the temperature span is larger, after the temperature sudden drop, the vapor will condense, thereby corrodes the circuit board assembled in the inside of casing, the severe person even influences the safety of airplane.

[0003] The existing electric structure casing has defects, the 4 screws of fixed casing and cover distribute in the middle and right side area, when installing, cause the left side not to be easy to compress tightly, can appear local gap, influence sealing reliability, and the existing cover has a groove, water cannot be discharged, if the sealing strip between the cover plate and reduction gearbox is damaged, the product has water entry hidden danger. UTILITY MODEL CONTENTS

[0004] In view of the above problem, the improved structure of electric mechanism is provided, aims at solving the problems in the prior art.

[0005] The specific technical scheme is as follows:

[0006] An improved structure of electric mechanism, including casing and cover, the cover can be installed on the opening of the casing through bolts, the opening of the casing is provided with two-stage sealing structure, the opening of the casing is provided with screw holes at four corners, the first stage sealing structure surrounds the edge of the opening end surface of the casing, the second stage sealing structure surrounds the circular opening at the right side of the center of the opening end surface of the casing, and a plurality of reinforcing screw holes are arranged around the circular opening of the opening end surface of the casing.

[0007] The improved structure of electric mechanism has the following characteristics, the first stage sealing structure includes a first sealing groove and a special-shaped sealing ring, the first sealing groove is arranged at the edge of the opening end surface of the casing, the first sealing groove is arranged to be curved towards the center of the opening end surface of the casing near the four screw holes, so that the four screw holes are between the first sealing groove and the edge of the opening end surface of the casing, and the special-shaped sealing ring is movably arranged in the first sealing groove.

[0008] The beneficial effects of the above scheme are that the screw holes are distributed at the four corners of the shell, the first sealing groove is arranged around the edge of the shell, and the stress of the connection between the shell and the cover is balanced when the four screw holes are screwed, thereby avoiding the appearance of gaps.

[0009] The improved structure of the electric mechanism has the following characteristics: the second sealing structure comprises a second sealing groove and a circular sealing ring, the second sealing groove is arranged at the outer periphery of the circular opening of the open end of the shell, the circular sealing ring is arranged in the second sealing groove, and a plurality of reinforcing screw holes are uniformly distributed at the outer periphery of the second sealing groove.

[0010] The beneficial effects of the above scheme are that the second sealing groove surrounds the circular opening, thereby further enhancing the sealing effect.

[0011] The improved structure of the electric mechanism has the following characteristics: the cover is provided with an extension body, the top surfaces of the two ends of the extension body are provided with bosses, and mounting holes are arranged in the bosses.

[0012] The beneficial effects of the above scheme are that the bosses arranged on the extension body increase the depth of the mounting holes, thereby avoiding the situation that the cover is not thick enough and is not stable during installation.

[0013] The improved structure of the electric mechanism has the following characteristics: the top surface between the two bosses of the extension body is provided with an inclined surface, and the thickness of the side close to the cover is greater than the thickness of the side away from the cover.

[0014] The beneficial effects of the above scheme are that the top surface of the extension body is provided with an inclined surface, thereby effectively avoiding water accumulation and water entry.

[0015] The beneficial effects of the above scheme are that the top surface of the extension body is provided with an inclined surface, thereby effectively avoiding water accumulation and water entry.

[0016] The improved structure of the electric mechanism provided by the utility model has the effects of ensuring force balance during the installation of the shell and the cover and improving the sealing capacity. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective structural schematic view of the improved structure of the electric mechanism of the utility model;

[0018] Figure 2 It is a front view structural schematic view of the open end surface of the shell of the improved structure of the electric mechanism of the utility model.

[0019] BRIEF DESCRIPTION OF DRAWINGS: 1, shell; 2, cover; 3, screw hole; 4, first sealing groove; 5, second sealing groove; 6, extension; 7, boss. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0022] The present application will be further described below in conjunction with specific embodiments, but not as a limitation of the present application.

[0023] Figure 1 is a perspective view of the improved structure of the electric mechanism of the present application, Figure 2 is a front view of the opening end surface of the shell of the improved structure of the electric mechanism of the present application, as shown in Figure 1 and Figure 2 The improved structure of the electric mechanism provided by the present embodiment includes a shell 1 and a cover 2, the cover 2 can be installed on the opening of the shell 1 by bolts, the opening of the shell 1 is provided with a two-stage sealing structure, screw holes 3 are formed at the four corners of the opening end surface of the shell 1, the first-stage sealing structure surrounds the edge of the opening end surface of the shell 1, the second-stage sealing structure surrounds the circular opening at the right side of the center of the opening end surface of the shell 1, and a plurality of reinforcing screw holes are formed around the circular opening of the opening end surface of the shell 1.

[0024] In the above embodiment, the first-stage sealing structure includes a first sealing groove 4 and a special-shaped sealing ring, the first sealing groove 4 is arranged at the edge of the opening end surface of the shell 1, the first sealing groove 4 is arranged to be curved towards the center of the opening end surface of the shell 1 near the four screw holes 3, so that the four screw holes 3 are between the first sealing groove 4 and the edge of the opening end surface of the shell 1, and the special-shaped sealing ring is movably arranged in the first sealing groove 4.

[0025] In the above embodiment, the second-stage sealing structure includes a second sealing groove 5 and a circular sealing ring, the second sealing groove 5 is formed on the outer periphery of the circular opening of the opening end surface of the shell 1, the circular sealing ring is arranged in the second sealing groove 5, and the plurality of reinforcing screw holes are uniformly distributed on the outer periphery of the second sealing groove 5.

[0026] It should be noted that the special-shaped sealing ring and the circular sealing ring are both made of silicone rubber ring, and are fixed size, without cutting, the initial state of the special-shaped sealing ring is also a circular ring, and the special-shaped sealing ring can be adjusted according to the first sealing groove 4 to adapt to the first sealing groove 4.

[0027] In the above embodiment, the cover 2 is provided with an extension body 6 on one side, and the top surface of the extension body 6 at both ends is provided with a boss 7, and the boss 7 is provided with a mounting hole.

[0028] In the above embodiment, the top surface of the extension body 6 between the two bosses 7 is provided with an inclined surface, and the thickness of the side close to the cover 2 is greater than the thickness of the side away from the cover 2.

[0029] It should be noted that, in the existing design, the extension body 6 on one side of the cover 2 is provided with a groove, and because the working temperature span of the product is large, condensate water is easily generated, which is easy to accumulate in the groove and cause water accumulation. The groove is improved to an inclined surface in the present scheme, which can effectively avoid water accumulation.

[0030] Working principle, when the cover 2 and the shell 1 are buckled, the screws are tightened in the screw holes 3, so that the special-shaped sealing ring is deformed and fully fills the first sealing groove 4. Because the screw holes 3 are distributed in the dead angle of the opening end of the shell 1, after the four screws are tightened, the cover 2 and the shell 1 are balanced to avoid gaps between them, and the top surface of the extension body 6 is provided with an inclined surface, so that when the condensate water is on the top surface of the extension body 6, it will leave along the inclined surface, avoiding water accumulation.

[0031] The above is only the preferred embodiment of the present application, and is not limited to the implementation and protection range of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious changes made by using the content of the present application should be included in the protection range of the present application.

Claims

1. An improvement in an electric motor mechanism, characterized by comprising: The utility model provides a sealing structure of a shell and a cover, the cover can be installed on the opening of the shell by bolt, the opening of the shell is provided with two-stage sealing structure, the opening of the shell is provided with screw hole (3) in four corners, the first stage sealing structure surrounds the edge of the opening end face of the shell, the second stage sealing structure surrounds the circular opening in the right side of the center of the opening end face of the shell, and the circular opening of the opening end face of the shell is provided with a plurality of reinforcing screw holes.

2. An improvement in an electric motor mechanism as claimed in claim 1, wherein: The first stage sealing structure includes first sealing groove (4) and special-shaped sealing ring, the first sealing groove (4) is arranged on the edge of the opening end face of the shell, the first sealing groove (4) is arranged to be curved to the center of the opening end face of the shell near four screw holes (3), so that four screw holes (3) are between the first sealing groove (4) and the edge of the opening end face of the shell, and the special-shaped sealing ring is movably arranged in the first sealing groove (4).

3. An improvement in an electric motor mechanism as claimed in claim 2, wherein: The second stage sealing structure includes second sealing groove (5) and circular sealing ring, the second sealing groove (5) is arranged on the outer periphery of the circular opening of the opening end of the shell, the circular sealing ring is arranged in the second sealing groove (5), and a plurality of reinforcing screw holes are uniformly distributed on the outer periphery of the second sealing groove (5).

4. An improvement in an electric motor mechanism as claimed in claim 3, wherein: One side of the cover (2) is provided with an extension body (6), the top surface of both ends of the extension body (6) is provided with a boss (7), and the boss (7) is provided with a mounting hole.

5. An improvement in an electric motor mechanism as claimed in claim 4, wherein: The top surface between the two bosses (7) of the extension body (6) is provided with an inclined surface, and the thickness of the side close to the cover (2) is greater than the thickness of the side away from the cover (2).

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