Exhaust structure of a waterproof gear box

Abstract

The utility model discloses a kind of exhaust structure of waterproof gear box, including shell, motor, gear box, sealing rubber plug, exhaust duct, wire harness terminal, positive wire harness and negative wire harness, wherein the motor is set in the rear end of the shell, the gear box is set in the middle part of the shell, and the rotating shaft of the motor and the gear box transmission connection, sealing waterproof structure is provided in the front end of the shell, mounting plate is provided in the rear end of the shell, mounting hole is opened in the center of the mounting plate, the sealing rubber plug is installed in the mounting hole, the exhaust duct passes through the sealing rubber plug, the exhaust duct is used to connect the internal space and external space of the shell. The utility model can keep the gear box relatively balanced, prevent water penetration into the gear box, and prolong the service life of the gear box.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to an exhaust structure for a waterproof gearbox. Background Technology

[0002] Gearboxes, as drive components, are widely used in various electrical appliances and are also an important part of sweeping machines. A typical gearbox generally consists of a housing, a motor, and a gear set. The motor and gear set are housed within the housing, with the motor shaft connected to the gear set. However, in current gearboxes, during operation, the motor generates heat, increasing the internal air pressure. This internal gas is then expelled through the rubber seal at the bottom of the gearbox. After operation stops, the internal temperature of the gearbox drops, and due to thermal expansion and contraction, a low-pressure state forms inside. This low pressure causes deformation of the rubber seal at the bottom of the gearbox, leading to waterproofing failure. Water then seeps into the gearbox along the edge of the rubber seal. Repeated occurrences over time will cause water accumulation inside the gearbox, ultimately leading to its failure and shortening its lifespan.

[0003] Therefore, it is necessary to improve the existing gearbox. Utility Model Content

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, one objective of the present invention is to propose a waterproof gearbox exhaust structure with better waterproof performance.

[0005] The above objective is achieved through the following technical solution:

[0006] A waterproof gearbox exhaust structure for use in a sweeper includes a housing, a motor, a gearbox, a sealing plug, an exhaust duct, wiring harness terminals, a positive wiring harness, and a negative wiring harness. The motor is located at the rear end of the housing, and the gearbox is located in the middle of the housing, with the motor shaft and gearbox being drively connected. A waterproof sealing structure is provided at the front end of the housing, and a mounting plate is provided at the rear end of the housing. A mounting hole is formed in the center of the mounting plate, and the sealing plug is installed in the mounting hole. The exhaust duct passes through the sealing plug and connects the internal and external spaces of the housing. The positive and negative wiring harnesses pass through the exhaust duct, with one end electrically connected to the motor and the other end connected to the wiring harness terminals.

[0007] In some embodiments, the outer peripheral wall of the sealing plug is provided with several rings of spaced-apart sealing protrusions in an annular shape.

[0008] In some embodiments, a sealing member is provided between the rear end of the housing and the mounting plate.

[0009] In some embodiments, a mounting portion for connection to the end of the housing is provided within the mounting plate, and an annular sealing portion extending outward is provided in the middle of the sealing member, the annular sealing portion being pressed between the rear end of the housing and the end of the mounting portion.

[0010] In some embodiments, several annular sealing protrusions are provided on both sides of the annular sealing portion and on the outer peripheral wall of the sealing member, and the sealing protrusions are in close contact with the inner wall of the end of the housing or the inner wall of the mounting portion.

[0011] In some embodiments, a sealing lip is provided at one end of the sealing member near the mounting plate, the sealing lip extending inward from the end of the sealing member and including a first V-shaped sealing portion and a second V-shaped sealing portion;

[0012] The opening of the first V-shaped seal is oriented toward the motor and is used to seal the bearing housing of the motor;

[0013] The opening of the second V-shaped seal is arranged to face outward, and is used to seal the opening between the annular seal and the mounting plate.

[0014] In some embodiments, the exhaust duct and the positive electrode harness and the negative electrode harness are interference fit.

[0015] In some embodiments, the sealing and waterproofing structure includes a rubber plug with a port at the center of the front end of the housing, and the rubber plug is installed in the port.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] This invention can maintain a relative balance between the internal and external air pressure of the gearbox, prevent water from seeping into the gearbox, and extend the service life of the waterproof gearbox. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the waterproof gearbox in the embodiment;

[0019] Figure 2 This is a structural cross-sectional view of the waterproof gearbox in the embodiment;

[0020] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0021] Figure 4 yes Figure 2 A magnified view of part B in the middle section;

[0022] Figure 5 yes Figure 2 A magnified view of part C in the middle;

[0023] Figure 6 This is a partial schematic diagram of the waterproof gearbox in the embodiment. Detailed Implementation

[0024] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0025] Example 1: As Figures 1 to 6 As shown, this embodiment provides a waterproof gearbox exhaust structure for use in a sweeper, including a housing 1, a motor 2, a gearbox 3, a sealing plug 4, an exhaust duct 51, a wiring harness terminal 52, a positive wiring harness 53, and a negative wiring harness 54. The motor 2 is located within the rear end of the housing 1, and the gearbox 3 is located within the middle of the housing 1. The shaft 21 of the motor 2 is connected to the gearbox 3 via a transmission connection. A waterproof sealing structure 6 is provided at the front end of the housing 1, and a mounting plate 7 is provided at the rear end of the housing 1. A mounting hole 70 is formed in the center of the mounting plate 7, and the sealing plug 4 is installed within the mounting hole 70. The exhaust duct 51 passes through the sealing plug 4 and connects the internal and external spaces of the housing 1. The positive wiring harness 53 and the negative wiring harness 54 pass through the exhaust duct 51, with one end electrically connected to the motor 2 and the other end connected to the wiring harness terminal 52.

[0026] The venting structure of the waterproof gearbox proposed in this embodiment can maintain a relative balance between the internal and external air pressure of the gearbox, prevent water from seeping into the gearbox, and extend the service life of the waterproof gearbox.

[0027] Specifically, this can prevent waterproofing failure caused by repeated deformation of the rubber seal due to unbalanced air pressure inside and outside the gearbox.

[0028] Furthermore, several ring-shaped sealing protrusions 41 are provided on the outer peripheral wall of the sealing plug 4, which can increase the friction and airtightness between the sealing plug 4 and the mounting hole 70, prevent the sealing plug 4 from falling out of the mounting hole 70, and also prevent water from entering the gearbox through the exhaust pipe 51 when the sweeper is working.

[0029] In this embodiment, a sealing member 8 is provided between the rear end of the outer casing 1 and the mounting plate 7. This design effectively seals the rear end of the outer casing 1 and the mounting plate 7 through the sealing member 8.

[0030] Preferably, the mounting plate 7 is provided with a mounting part 71 for connecting to the end of the housing 1, and the sealing member 8 is provided with an annular sealing part 81 extending outward in the middle. The annular sealing part 81 is pressed between the rear end of the housing 1 and the end of the mounting part 71. The annular sealing part 81 can further improve the sealing performance of the connection between the housing 1 and the mounting part 71, and prevent water or foreign objects from entering the interior of the housing 1.

[0031] Furthermore, several annular sealing protrusions 82 are provided on both sides of the annular sealing part 81 and on the outer peripheral wall of the sealing member 8. The sealing protrusions 82 are closely attached to the inner wall of the end of the housing 1 or the inner wall of the mounting part 71, which can further improve the sealing performance of the connection between the housing 1 and the mounting part 71, prevent water or foreign objects from entering the interior of the housing 1, and effectively prevent water leakage.

[0032] Wherein, a sealing lip 83 is provided at one end of the sealing member 8 near the mounting plate 7. The sealing lip 83 extends inward from the end of the sealing member 8 and includes a first V-shaped sealing part 831 and a second V-shaped sealing part 832.

[0033] The opening of the first V-shaped sealing part 831 is arranged facing the motor 2, and is used to seal the bearing chamber 20 of the motor 2;

[0034] The opening of the second V-shaped sealing part 832 is arranged facing outward, and is used to seal the opening between the annular sealing part 81 and the mounting plate 7.

[0035] This mitigates the damage to the annular seal 81 caused by different air pressures due to varying temperatures during and after gearbox use.

[0036] Furthermore, the exhaust duct 51 and the positive electrode harness 53 and the negative electrode harness 54 are interference-fitted, thereby ensuring a tight and secure connection between the exhaust duct 51 and the positive electrode harness 53 and the negative electrode harness 54.

[0037] Furthermore, the sealing and waterproof structure 6 includes a rubber plug 61, and a port 11 is provided at the center of the front end of the outer shell 1. The rubber plug 61 is installed in the port 11, thereby achieving a sealing design at both ends of the gearbox.

[0038] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A waterproof gearbox exhaust structure for use in a sweeper, characterized in that, The device includes a housing (1), a motor (2), a gearbox (3), a sealing plug (4), an exhaust duct (51), a wiring harness terminal (52), a positive wiring harness (53), and a negative wiring harness (54). The motor (2) is located at the rear end of the housing (1), and the gearbox (3) is located at the front end of the housing (1). The shaft (21) of the motor (2) and the gearbox (3) are connected in a driving connection. A sealing and waterproof structure (6) is provided at the front end of the housing (1), and a mounting plate (7) is provided at the rear end of the housing (1). The mounting plate (7) has a mounting hole (70) in the center. The sealing plug (4) is installed in the mounting hole (70). The exhaust pipe (51) passes through the sealing plug (4). The exhaust pipe (51) is used to connect the internal space and the external space of the housing (1). The positive wire harness (53) and the negative wire harness (54) are installed in the exhaust pipe (51). One end of the positive wire harness (53) and the negative wire harness (54) are electrically connected to the motor (2), and the other end is connected to the wire harness terminal (52).

2. The venting structure of a waterproof gearbox according to claim 1, characterized in that, The outer peripheral wall of the sealing plug (4) is provided with several rings of spaced and annular sealing protrusions (41).

3. The venting structure of a waterproof gearbox according to claim 1, characterized in that, A sealing member (8) is provided between the rear end of the outer casing (1) and the mounting plate (7).

4. The venting structure of a waterproof gearbox according to claim 3, characterized in that, An installation part (71) for connecting to the end of the housing (1) is provided in the mounting plate (7), and an annular sealing part (81) extending outward is provided in the middle of the sealing member (8). The annular sealing part (81) is pressed between the rear end of the housing (1) and the end of the installation part (71).

5. The venting structure of a waterproof gearbox according to claim 4, characterized in that, On both sides of the annular sealing part (81) and on the outer peripheral wall of the sealing member (8), there are several rings of sealing protrusions (82) that are spaced apart and arranged in annular shape. The sealing protrusions (82) are tightly attached to the inner wall of the end of the outer shell (1) or the inner wall of the mounting part (71).

6. The venting structure of a waterproof gearbox according to claim 5, characterized in that, A sealing lip (83) is provided at one end of the sealing member (8) near the mounting plate (7). The sealing lip (83) extends inward from the end of the sealing member (8) and includes a first V-shaped sealing portion (831) and a second V-shaped sealing portion (832). The opening of the first V-shaped sealing part (831) is arranged facing the direction of the motor, and is used to seal the bearing chamber (20) of the motor (2); The opening of the second V-shaped sealing part (832) is arranged facing outward, and is used to seal the opening between the annular sealing part (81) and the mounting plate (7).

7. The venting structure of a waterproof gearbox according to any one of claims 1-6, characterized in that, The exhaust duct (51) and the positive electrode harness (53) and the negative electrode harness (54) are interference fit.

8. The venting structure of a waterproof gearbox according to any one of claims 1-6, characterized in that, The sealing and waterproof structure (6) includes a rubber plug (61), and a port (11) is provided at the front center of the outer shell (1), and the rubber plug (61) is installed in the port (11).

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