Waterproof ventilation structure for non-closed gearbox

Abstract

The waterproof ventilation structure for the non-closed gearbox comprises a box body, a window installation flange and a window, the window installation flange is arranged on the top of the box body, the window is installed on the window installation flange through ventilation screws, and the ventilation screws are evenly distributed on the periphery of the window. The window mounting flange is provided with vertically-through threaded holes corresponding to the ventilation screws, the ventilation screws are provided with ventilation holes, and inlets of the ventilation holes are located in the radial direction of the exposed portions of the ventilation screws. A traditional ventilation cap is omitted, screws for fixing the window are improved, the overall height of the gear box is reduced, the upper portion of the gear box is changed into a large plane, small equipment can be installed, interference is avoided, and the attractiveness of the gear box is improved.

Description

Technical Field

[0001] This utility model relates to the field of gearbox manufacturing technology, specifically to a waterproof and breathable structure for a non-sealed gearbox. Background Technology

[0002] The co-rotating flat twin gearbox is a commonly used transmission device, primarily used to drive two parallel, co-rotating screws to achieve efficient mixing, melting, and extrusion of materials. Originally used in industrial machinery for power transmission and material processing, the co-rotating flat twin gearbox has gradually gained widespread application in fields such as machinery manufacturing, aerospace, automotive, and energy with continuous technological advancements.

[0003] As a typical non-hermetic gearbox, the co-rotating flat dual gearbox requires a vent cap to balance the internal pressure. Traditionally, the gearbox vent cap is a separate component, such as... Figure 1 As shown, the vent cap 6 is installed at the top of the gearbox. The presence of the vent cap increases the overall height of the gearbox, increasing transportation costs and requiring more space for installation and use. Furthermore, many companies install other small devices on top of the gearbox; the vent cap makes installation difficult and increases the risk of interference. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a waterproof and breathable structure for a non-sealed gearbox, which solves the problems of traditional gearboxes occupying space and causing interference. The breathable structure of the gearbox is improved, which does not occupy space, facilitates customer equipment installation, and increases the aesthetics of the gearbox.

[0005] The purpose of this utility model is achieved as follows:

[0006] A waterproof and ventilated structure for a non-sealed gearbox includes a housing, a window mounting flange, and a window. The top of the housing is provided with a window mounting flange. The window is mounted on the window mounting flange by vent screws. Multiple vent screws are evenly distributed around the window. The window mounting flange is provided with threaded holes that pass through the top and bottom corresponding to the vent screws. The vent screw is provided with a vent hole, and the vent hole inlet is located radially on the exposed part of the vent screw.

[0007] Preferably, the vent hole includes a radial through hole section and an axial through hole section, the radial through hole section is disposed on the exposed head of the vent screw, and the radial through hole section is connected to the axial through hole section.

[0008] Preferably, an oil baffle plate is provided inside the housing corresponding to the vent screw, and the oil baffle plate is welded to the viewing window mounting flange.

[0009] Preferably, the oil return plate has a U-shaped cross-section, including a vertical inner section, a horizontal section, and a vertical outer section. The vertical inner section and the vertical outer section are distributed on the inner and outer sides of the vent screw. The vertical inner section is lower than the vertical outer section. The top of the vertical outer section is welded to the window mounting flange. A gap is left between the vertical inner section and the window mounting flange.

[0010] Preferably, the bottom of the vertical outer section is provided with an oil return hole.

[0011] The beneficial effects of this utility model are:

[0012] The traditional vent cap has been eliminated, the screws used to fix the viewing window have been improved, the overall height of the gearbox has been reduced, and the upper part of the gearbox has become a large flat surface, which can install small equipment without interference and increases the aesthetics of the gearbox.

[0013] The vent inlet is located radially on the outer head of the screw to prevent impurities from entering the gearbox. The vent connects the inside and outside of the gearbox to maintain internal and external pressure balance. At the same time, an oil baffle plate is added inside the gearbox to prevent oil and gas from overflowing from the vent. Attached Figure Description

[0014] Figure 1 A schematic diagram of a structure with a vent cap on the top of a co-directional flat dual gearbox in the prior art.

[0015] Figure 2 This is a schematic diagram of a waterproof and breathable structure for a non-sealed gearbox according to the present invention.

[0016] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0017] The components include: 1. Housing; 2. Window mounting flange; 3. Window; 4. Vent screw; 4.1. Vent hole; 5. Oil return plate; 5.1. Vertical inner section; 5.2. Horizontal section; 5.3. Vertical outer section; 5.4. Oil return hole; 5.5. Oil storage area; 6. Vent cap. Detailed Implementation

[0018] See Figure 2 and Figure 3This utility model relates to a waterproof and ventilated structure for a non-sealed gearbox, comprising a gearbox body 1, a window mounting flange 2, a window 3, and vent screws 4. The top of the gearbox body 1 is provided with the window mounting flange 2. The window 3 is mounted on the window mounting flange 2 by vent screws 4. Multiple vent screws 4 are evenly distributed around the window 3. The window mounting flange 2 is provided with threaded holes corresponding to the vent screws 4. The window 3 is provided with through holes corresponding to the vent screws 4. The vent screws 4 are provided with vent holes 4.1, which connect the exposed part of the vent screw to the bottom. The inlet of the vent hole 4.1 is located radially to the vent screw 4 and outside the window 3 to prevent impurities from falling into the gearbox body 1. The vent hole 4.1 includes a radial through hole section and an axial through hole section. The radial through hole section and the axial through hole section are connected, allowing air to enter from the side of the vent screw 4, pass through the radial through hole section into the axial through hole section, and finally enter the gearbox body 1 from the bottom of the vent screw 4.

[0019] To prevent oil and oil vapor from overflowing from the vent hole 4.1 of the vent screw 4, an oil baffle plate 5 is provided inside the housing 1 corresponding to the vent screw 4. The oil baffle plate 5 is welded to the viewing window mounting flange 2. The oil baffle plate 5 has a U-shaped cross-section, including a vertical inner section 5.1, a horizontal section 5.2, and a vertical outer section 5.3. The vertical inner section 5.1 and the vertical outer section 5.3 are distributed on the inner and outer sides of the vent screw 4, with the vertical inner section 5.1 lower than the vertical outer section 5.3. The top of the vertical outer section 5.3 is welded to the viewing window mounting flange 2, and a gap is left between the vertical inner section 5.1 and the viewing window mounting flange 2 to block oil vapor while allowing air to enter the housing 1. The bottom of the vertical outer section 5.3 is provided with an oil return hole 5.4. An oil storage area 5.5 is formed inside the U-shaped oil baffle plate 5. When oil vapor accumulates in the oil storage area 5.5 and begins to liquefy, it can flow out through the oil return hole 5.4.

[0020] When the gearbox is working, the pressure inside and outside the gearbox is balanced through the vent holes on multiple vent screws. To prevent lubricating oil and oil vapor inside the gearbox from leaking to the outside through the vent holes, an oil baffle plate is installed below the vent screws. The oil baffle plate can block oil and oil vapor from passing directly through the vent holes. At the same time, there is an oil return hole on the outside of the oil baffle plate. When oil vapor accumulates in the oil storage area and begins to liquefy, it can flow out through the oil return hole.

[0021] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A waterproof and breathable structure for a non-sealed gearbox, comprising a housing, a window mounting flange, and a window, wherein the top of the housing is provided with a window mounting flange, characterized in that: The window is mounted on the window mounting flange by vent screws. Multiple vent screws are evenly distributed around the window. The window mounting flange has threaded holes that pass through the top and bottom corresponding to the vent screws. The vent screw has a vent hole, and the vent hole inlet is located radially on the exposed part of the vent screw.

2. The waterproof and breathable structure for a non-sealed gearbox according to claim 1, characterized in that: The vent hole includes a radial through-hole section and an axial through-hole section. The radial through-hole section is located on the exposed head of the vent screw, and the radial through-hole section is connected to the axial through-hole section.

3. The waterproof and breathable structure for a non-sealed gearbox according to claim 1, characterized in that: The housing is equipped with an oil baffle plate corresponding to the vent screw, and the oil baffle plate is welded to the viewing window mounting flange.

4. The waterproof and breathable structure for a non-sealed gearbox according to claim 3, characterized in that: The oil baffle plate has a U-shaped cross-section, including a vertical inner section, a horizontal section, and a vertical outer section. The vertical inner section and the vertical outer section are distributed on the inner and outer sides of the vent screw. The vertical inner section is lower than the vertical outer section. The top of the vertical outer section is welded to the window mounting flange. A gap is left between the vertical inner section and the window mounting flange.

5. The waterproof and breathable structure for a non-sealed gearbox according to claim 4, characterized in that: The bottom of the vertical outer section is provided with an oil return hole.

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