CN218953967U

CN218953967U - Oil-blocking ventilation structure of loader gearbox

Info

Publication number: CN218953967U
Application number: CN202223323146.9U
Authority: CN
Inventors: 谢鹏; 任高奇; 阙智坚
Original assignee: Lonking Fujian Bridge Box Co Ltd
Current assignee: Lonking Fujian Bridge Box Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-02
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses an oil blocking and ventilation structure of a loader gearbox, which comprises the following steps: the breathable film component comprises a sealed cylindrical outer waterproof film, a middle waterproof film, an inner waterproof film and an M-shaped breathable film; the dust-separating pad comprises a disc-shaped upper separating pad and a closed cylindrical lower separating ring which surrounds one circle of the disc-shaped upper separating pad, and the upper separating pad is adhered to the breathable film component sleeved in the dust-separating pad; one ventilation net is clamped at the upper part of the inner hole of the screw thread head by an inner clamping spring, and the other ventilation net is locked and propped below the inner hole of the screw thread head by an oil blocking pipe; the oil baffle pipe comprises a cap-shaped connecting disc with external threads at the head part and a barrel-shaped circular pipe with a rectangular opening at the side surface; the lower end of the inner hole of the thread head is locked with the oil blocking pipe connecting disc, the upper end of the oil blocking pipe connecting disc is sleeved with the ventilated membrane component, and the joint surface of the filter plate placed at the upper end of the thread head is provided with pentagonal ventilation holes. The utility model solves the problems of low processing and assembling efficiency, high manufacturing and maintaining cost, aging and damage of the air pipe of the external air-permeable joint of the filtering device, and oil leakage of the gearbox caused by unexpected clamping and deformation caused by a plurality of processed parts in the prior art.

Description

Oil-blocking ventilation structure of loader gearbox

Technical Field

The utility model relates to the technical field of loader gearboxes, in particular to an oil-blocking ventilation structure of a loader gearbox.

Background

The loader gearbox is one of the core transmission parts of the loader, and can play a role in changing the transmission ratio and expanding the torque and the rotating speed of the driving wheel; maintaining a good and stable internal pressure of the gearbox keeps the internal and external pressure differences balanced to prevent the gearbox from leaking oil caused by the damage of the sealing element by liquid is an important condition for ensuring the normal operation of the gearbox. The regulation of the internal pressure of the gearbox is completed through the ventilation structure so as to ensure the tightness of the internal sealing element of the gearbox. The prior ventilation structure of the gearbox generally adopts a ventilation joint externally connected with an oil filtering device, the ventilation joint is locked on the gearbox, and then a Chinese character 'ji' shaped oil baffle plate is locked at the orifice of the ventilation joint of the gearbox through an opening bolt and a nut so as to block the orifice of the ventilation joint, thereby forming a ventilation structure; this ventilative structure is through the fluid that splashes in the oil baffle blocks the gearbox, and rethread external fluid filter equipment only can let gaseous molecule pass through, and liquid can't pass through from inside, and the dust can't get into from outside yet to realize waterproof, dustproof, grease proofing, ventilative purpose. However, this breathable structure has the following drawbacks:

1. the processing parts are more, and parts such as a gearbox body, an air-permeable joint, an oil liquid filtering device, an oil baffle plate, a bolt, a nut, a cotter pin and the like are required to be processed, so that the production efficiency is low, and the manufacturing cost is high;

2. the assembly steps of the ventilation structure are more, the assembly is complicated, and the production efficiency is reduced; during maintenance, a plurality of tools are required to be prepared, so that the maintenance cost and the maintenance difficulty are increased;

3. when the air pipe of the external air-permeable joint is aged and damaged and is accidentally blocked to deform, the internal pressure and heat of the gearbox are easily increased, and the faults such as oil leakage and the like of the gearbox are caused.

Disclosure of Invention

The utility model aims to provide the oil-blocking ventilation structure of the gearbox of the loader, which has the advantages of simple and compact structure, high efficiency in processing and assembling, low manufacturing and maintenance cost and reliable use, and solves the problems of low processing and assembling efficiency, high manufacturing and maintenance cost, and oil leakage of the gearbox caused by the fact that a plurality of processed parts cause the aging and damage of an air pipe of an external ventilation joint of a filtering device and the deformation caused by unexpected clamping.

In order to achieve the purpose, the oil blocking and ventilation structure of the loader gearbox comprises a shell 1, a bolt 2, a nut 3, a box 4, a ventilation net 5, a thread head 6, a filter plate 7, a ventilation membrane component 8, a dust isolation pad 9, a shell 10, an inner clamp spring 11 and an oil blocking pipe 12; the breathable film component 8 consists of an outer oil-proof film 8-1, a middle waterproof film 8-2, an inner oil-proof film 8-3 and a breathable film 8-4, wherein the inner oil-proof film 8-3 is formed by winding an oil-proof film into a closed cylinder, the middle waterproof film 8-2 is formed by winding a waterproof film into a closed cylinder, the outer oil-proof film 8-1 is formed by winding an oil-proof film into a closed cylinder, the breathable film 8-4 is formed by folding the breathable film into an M shape and cutting and then expanding the breathable film into an M shape, one end of the breathable film is bonded at the upper end of an inner cylinder of the inner oil-proof film 8-3, and the other end of the breathable film is bonded at the lower end of the inner cylinder of the inner oil-proof film 8-3; the dust separation pad 9 consists of an upper separation pad 9-1 and a lower separation ring 9-2, wherein the upper separation pad 9-1 is disc-shaped, the lower separation ring 9-2 is formed by winding the upper separation pad 9-1 into a closed cylinder shape, and the upper separation pad 9-1 is attached to the ventilation membrane component 8 sleeved in the dust separation pad 9; one ventilation net 5 is clamped at the upper part of the inner hole of the threaded head 6 by an inner clamping spring 11, and the other ventilation net is locked by an oil blocking pipe 12 and is propped against the lower part of the inner hole of the threaded head 6; the oil baffle pipe 12 is formed by welding a connecting disc 12-1 and a round pipe 12-2, wherein the head of the connecting disc 12-1 is externally threaded in a cap shape, the round pipe 12-2 is punched into a barrel shape by a steel plate, and a rectangular opening is formed in the side face of the barrel shape; the connecting disc 12-1 on the oil blocking pipe 12 is locked at the lower end of the inner hole of the threaded head 6, the air permeable membrane component 8 is sleeved at the upper end of the inner hole of the threaded

head

6, and 6 pentagonal air holes are formed in the joint surface of the filter plate 7 placed at the upper end of the threaded head 6.

The inner oil-proof film 8-3 is formed by winding an oil-proof film with the thickness of 1mm and the height of 28mm into a closed cylinder with the outer diameter phi of 26 mm; the middle waterproof membrane 8-2 is formed by winding a waterproof membrane with the thickness of 1mm and the height of 28mm into a closed cylinder with the outer diameter phi of 28 mm; the outer oil-proof film 8-1 is formed by winding an oil-proof film with the thickness of 1mm and the height of 28mm into a closed cylinder with the outer diameter phi of 30 mm; the breathable film 8-4 is formed by folding a breathable film with the thickness of 1mm, the length of 89mm and the width of 24mm into an M shape, cutting the breathable film according to the outer diameter phi of 25mm, and then unfolding the breathable film into the M shape.

The upper spacer 9-1 is disc-shaped with the outer diameter phi of 30mm and the thickness of 5mm, and the lower spacer 9-2 is formed by winding the spacer with the thickness of 0.5mm and the height of 10mm around the upper spacer 9-1 to form a closed cylinder with the outer diameter phi of 31 mm.

The head of the connecting disc 12-1 is in the shape of a hat with M18 external threads, the round tube 12-2 is punched into a barrel shape by a steel plate with the thickness of 0.5mm, and a rectangular opening with the length of 20mm and the height of 10mm is arranged on the side surface of the barrel shape.

When the loader works, most of oil splashed at the bottom of the gearbox is blocked by the oil blocking pipe 12, the rest of oil is blocked by the ventilation net 5, and generated oil mist passes through the oil blocking pipe 12, the ventilation net 5 and then the filter plate 7 and the ventilation membrane component 8, and the gas molecules in the oil mist are discharged through the outer interface of the screw thread head 6 by utilizing the volume and quantity level difference of the gas molecules and the liquid particles, so that the purpose of preventing oil leakage and ventilation is realized; dust and liquid outside the gearbox entering from the outer interface of the threaded head 6 can be blocked outside through the filter plate 7, the ventilation membrane component 8 and the dust-proof cushion 9, so that the functions of dust prevention and water prevention are realized.

The loader gearbox oil blocking ventilation structure has the advantages that the ventilation device and the oil blocking device are combined to form an oil blocking ventilation assembly and are locked on the gearbox body by canceling the external oil filtering device and the oil blocking plate of the ventilation joint in the prior art, and the loader gearbox oil blocking ventilation structure has the following technical characteristics and beneficial effects:

1. according to the utility model, the original oil filtering device, the ventilation interface and the oil baffle are omitted, and instead, the oil baffle ventilation assembly formed by combining the ventilation device and the oil baffle is adopted and is locked on the gearbox body in a general screwing installation mode, so that the installation complexity and complexity are greatly reduced, the production efficiency is improved, the manufacturing cost is reduced, and the cost performance is improved.

2. The related components of the oil-blocking ventilation assembly adopt high polymer materials such as chemical resistance, high and low temperature resistance, aging resistance and the like, so that the reliability of the product is improved.

3. The utility model has simple structure, reasonable design, convenient popularization, improved product quality and strong practicability.

The oil blocking and ventilation structure of the loader gearbox well solves the problems that in the prior art, the machining and assembling efficiency is low, the manufacturing and maintenance cost is high due to the fact that a plurality of machined parts are machined, and the internal pressure of the gearbox is increased due to the fact that the internal oil is expanded due to the fact that an air pipe of an external ventilation joint of a filtering device is aged and damaged and is accidentally blocked to deform, so that oil leakage of the gearbox is caused, the problem that the oil leakage of the gearbox is caused due to the fact that internal pressure and external pressure difference are unbalanced is avoided, the service life and product quality of the gearbox are greatly improved, and equipment maintenance cost is reduced.

Drawings

FIG. 1 is a schematic view in principal section of the oil-retaining and air-permeable structure of the gearbox of the loader according to the utility model.

FIG. 2 is an enlarged schematic view of the cross-section A-A of FIG. 1.

Fig. 3 is a schematic view of the inside of the ventilation structure of fig. 1.

Reference numerals: the device comprises a shell 1, bolts 2, nuts 3, a box body 4, an air-permeable net 5, a threaded head 6, a filter plate 7, an air-permeable membrane component 8, a dust-proof pad 9, a shell 10, an inner clamping spring 11 and an oil-proof pipe 12.

Detailed Description

The oil-blocking and ventilation structure of the loader gearbox of the utility model is further described in detail below with reference to the accompanying drawings and the specific embodiments.

The oil blocking and ventilation structure of the loader gearbox comprises a shell 1, bolts 2, nuts 3, a box 4, a ventilation net 5, a thread head 6, a filter plate 7, a ventilation membrane component 8, a dust isolation pad 9, a shell 10, an inner clamp spring 11 and an oil blocking pipe 12, wherein the oil blocking and ventilation structure is shown in the figure 1; the breathable film component 8 consists of an outer oil-proof film 8-1, a middle waterproof film 8-2, an inner oil-proof film 8-3 and a breathable film 8-4, wherein the inner oil-proof film 8-3 is formed by winding an oil-proof film into a closed cylinder, the middle waterproof film 8-2 is formed by winding a waterproof film into a closed cylinder, the outer oil-proof film 8-1 is formed by winding an oil-proof film into a closed cylinder, the breathable film 8-4 is formed by folding the breathable film into an M shape and cutting and then expanding the breathable film into an M shape, one end of the breathable film is bonded at the upper end of an inner cylinder of the inner oil-proof film 8-3, and the other end of the breathable film is bonded at the lower end of the inner cylinder of the inner oil-proof film 8-3; the dust separation pad 9 consists of an upper separation pad 9-1 and a lower separation ring 9-2, wherein the upper separation pad 9-1 is disc-shaped with the outer diameter phi of 30mm and the thickness of 5mm, the lower separation ring 9-2 is formed by winding the separation pad with the thickness of 0.5mm and the height of 10mm around the upper separation pad 9-1 to form a closed cylinder with the outer diameter phi of 31mm, and the upper separation pad 9-1 is attached to the ventilation membrane component 8 sleeved in the dust separation pad 9; one ventilation net 5 is clamped at the upper part of the inner hole of the threaded head 6 by an inner clamping spring 11, and the other ventilation net is locked by an oil blocking pipe 12 and is propped against the lower part of the inner hole of the threaded head 6; the oil baffle pipe 12 is formed by welding a connecting disc 12-1 and a round pipe 12-2, the head of the connecting disc 12-1 is in the shape of a hat with M18 external threads, the round pipe 12-2 is punched into a barrel shape by a steel plate with the thickness of 0.5mm, and a rectangular opening with the length of 20mm and the height of 10mm is arranged on the side surface of the barrel shape; the connecting disc 12-1 on the oil blocking pipe 12 is locked at the lower end of the inner hole of the threaded head 6, the air permeable membrane component 8 is sleeved at the upper end of the inner hole of the threaded

head

The assembling steps of the loader gearbox oil-blocking ventilation structure are as follows:

1. one ventilation net 5 is assembled to the upper end of the inner hole of the threaded head 6 by using an inner clamping spring 11, and the other ventilation net 5 is placed into the lower end of the inner hole of the threaded head 6 and is propped and locked by using an oil blocking pipe 12;

2. after the upper end of the ventilation membrane component 8 is sleeved into the dust-proof cushion 9, the lower end of the ventilation membrane component 8 is sleeved into the upper end of the inner hole of the screw thread head 6;

3. after the filter plate 7 is placed against the external thread at the upper end of the thread head 6, the shell 10 is locked at the upper end of the thread head 6 to form a ventilation valve assembly;

4. the breather valve assembly formed by the above is locked on the box body 4, and then the shell 1 and the box body 4 are combined by the bolts 2 and the nuts 3, so that the assembly of the oil-blocking and breather structure of the gearbox of the loader is completed.

When the gearbox works, large oil drops in the gearbox are blocked by the oil blocking pipe 12, so that oil is prevented from splashing into the inner hole of the threaded head 6, and the filtration of the oil in the gearbox is completed; the oil mist entering the oil blocking pipe 12 in the gearbox passes through the two ventilation nets 5 in the inner hole of the threaded head 6, so that primary filtration of the oil mist in the gearbox is completed; the oil mist passes through the ventilation membrane component 8 and the dust-separating pad 9 to finish the second filtering of the oil mist inside; the oil mist passes through the filter plate 7 again, and the third filtering of the oil mist in the interior is completed. The dust, oil mist, water mist and the like outside the gearbox pass through the vent holes of the screw thread head 6, and the first filtration of the dust, the oil mist, the water mist and the like outside is completed through the filter plate 7; then the second filtration of external dust, oil mist, water mist and the like is completed through the ventilation membrane component 8 and the dust-isolation pad 9; then the third filtering of external dust, oil mist, water mist and the like is completed through the two ventilation nets 5 in the inner hole of the thread head 6; oil in the gearbox, dust, oil mist, water mist and the like outside the gearbox pass through a filtering system consisting of a filter plate 7, a ventilation membrane component 8, a dust isolation pad 9, a ventilation net 5 and an oil blocking pipe 12 in the ventilation valve assembly, so that oil mist macromolecular particles in the gearbox are blocked in the gearbox; macromolecular particles such as dust, oil mist, water mist and the like outside the gearbox are blocked outside the gearbox, so that the internal pressure and the external pressure of the gearbox assembly are balanced, and the tightness of a sealing element inside the gearbox assembly is ensured.

Claims

1. The utility model provides a loader gearbox keeps off ventilative structure of oil, it includes casing (1), bolt (2), nut (3), box (4), ventilative net (5), screw thread head (6), filter plate (7), shell (10) and interior clamping spring (11), characterized by: it also comprises a ventilated membrane component (8) a dust isolation pad (9) and an oil blocking pipe (12); the breathable film assembly (8) is composed of an outer oil-proof film (8-1), an intermediate waterproof film (8-2), an inner oil-proof film (8-3) and a breathable film (8-4), wherein the inner oil-proof film (8-3) is formed by winding the oil-proof film into a closed cylinder, the intermediate waterproof film (8-2) is formed by winding the waterproof film into a closed cylinder, the outer oil-proof film (8-1) is formed by winding the oil-proof film into a closed cylinder, the breathable film (8-4) is formed by folding the breathable film into an M shape and cutting the M shape, then expanding the breathable film into the M shape, one end of the M shape is adhered to the upper end of an inner cylinder of the inner oil-proof film (8-3), and the other end of the M shape is adhered to the lower end of the inner cylinder of the inner oil-proof film (8-3); the dust-proof pad (9) consists of an upper spacer (9-1) and a lower spacer ring (9-2), the upper spacer (9-1) is disc-shaped, the lower spacer ring (9-2) is formed by winding the upper spacer (9-1) into a closed cylinder shape, and the upper spacer (9-1) is attached to a ventilation membrane component (8) sleeved in the dust-proof pad (9); one ventilation net (5) is clamped at the upper part of the inner hole of the threaded head (6) by an inner clamping spring (11), and the other ventilation net is locked by an oil blocking pipe (12) and is propped against the lower part of the inner hole of the threaded head (6); the oil baffle pipe (12) is formed by welding a connecting disc (12-1) and a round pipe (12-2), the head of the connecting disc (12-1) is in a cap shape with external threads, the round pipe (12-2) is punched into a barrel shape by a steel plate, and a rectangular opening is arranged on the side face of the barrel shape; the lower end of the inner hole of the threaded head (6) is locked with a connecting disc (12-1) on the oil blocking pipe (12), the upper end of the inner hole of the threaded head (6) is sleeved with a breathable film component (8), and the joint surface of the upper end of the threaded head (6) for placing the filter plate (7) is provided with 6 pentagonal breathable holes.

2. The loader gearbox oil-retaining ventilation structure of claim 1, wherein: the inner oil-proof membrane (8-3) is formed by winding an oil-proof membrane with the thickness of 1mm and the height of 28mm into a closed cylinder with the outer diameter phi of 26 mm; the middle waterproof membrane (8-2) is formed by winding a waterproof membrane with the thickness of 1mm and the height of 28mm into a closed cylinder with the outer diameter phi of 28 mm; the outer oil-proof film (8-1) is formed by winding an oil-proof film with the thickness of 1mm and the height of 28mm into a closed cylinder with the outer diameter phi of 30 mm; the breathable film (8-4) is formed by folding a breathable film with the thickness of 1mm, the length of 89mm and the width of 24mm into an M shape, cutting the breathable film according to the outer diameter phi of 25mm, and then unfolding the breathable film into the M shape.

3. The loader gearbox oil-retaining ventilation structure of claim 1, wherein: the upper spacing pad (9-1) is disc-shaped with the outer diameter phi of 30mm and the thickness of 5mm, and the lower spacing ring (9-2) is formed by winding the spacing pad with the thickness of 0.5mm and the height of 10mm around the upper spacing pad (9-1) into a closed cylinder with the outer diameter phi of 31 mm.

4. The loader gearbox oil-retaining ventilation structure of claim 1, wherein: the head of the connecting disc (12-1) is in the shape of a hat with M18 external threads, the round tube (12-2) is punched into a barrel shape by a steel plate with the thickness of 0.5mm, and a rectangular opening with the length of 20mm and the height of 10mm is arranged on the side surface of the barrel shape.