Gearbox device

Abstract

The utility model relates to a gear box device which is provided with a shell (1) and a rotating piece (2), a first bearing (3) and a second bearing (4) are arranged between the shell (1) and the rotating piece (2), a ventilation system (5) is arranged on the shell (1), the ventilation system (5) is provided with a ventilation opening (51) facing the inner opening of the gear box device, and the first bearing (3) and the second bearing (4) are arranged on the shell (1). The ventilation opening (51) is formed between the first bearing (3) and the second bearing (4), an oil blocking piece (6) is arranged on the radial inner side of the ventilation opening (51), and the oil blocking piece (6) is used for preventing oil in the gearbox device from entering the ventilation opening (51), so that the ventilation opening (51) is prevented from being blocked.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear box technical field especially relates to a gear box device with special ventilation structure aims at solving the problem that the ventilation hole is easy to block in the operation process of gear box, guarantees the stable operation of gear box. BACKGROUND

[0002] In the technical application scene of gear box device, the gear inside the gear box cavity inevitably generates heat in the operation process, which is mainly caused by multiple factors. Among them, the power loss of gear meshing transmission, the power loss caused by gear stirring oil and the friction of bearing transmission surface are important sources of heat. Under the working condition of high-speed rotation of the gear, the oil liquid in the box body presents a high-speed splashing state, which aims to lubricate and cool the gear and each component. However, in this process, the oil liquid will continuously impact each part of the box body.

[0003] This working state brings a series of problems to be solved. On the one hand, the friction heat and the change of environmental temperature make the temperature of the gear box rise. If there is no ventilation hole or the ventilation hole is in the blocked state at this time, the pressure inside the gear box will gradually increase. Moreover, the higher the temperature in the device, the greater the pressure difference between it and the external environment. When this pressure difference exceeds a certain limit, under the action of pressure difference, the lubricating oil will leak from the gap of the gear box, which poses a great challenge to the sealing performance of the gear box, greatly increases the risk of leakage at the sealing place, and thus directly affects the normal operation and service life of the gear box.

[0004] On the other hand, from the existing technical means, in order to balance the pressure in the gear box, the usual way is to add a ventilation device at the top of the gear cavity. In this design, the part of the ventilation hole close to the gear cavity is designed as a small hole diameter, and it is set behind the gear, in order to try to prevent the oil from entering the ventilation hole directly. However, the actual lubrication test results show that although such design measures are taken, the ventilation hole is still in the high pressure area. In high pressure environment, oil is still easy to enter the ventilation hole, and with the passage of time, the ventilation hole is often blocked by oil, eventually leading to the loss of ventilation function of the ventilation valve. This problem not only interferes with the normal operation of the power wheel, but also damages the sealing structure due to the ineffective balance of pressure, and thus reduces the reliability of the whole power wheel system.

[0005] In summary, in view of the above-mentioned deficiencies of the existing gear box ventilation scheme, there is an urgent need for a new technical scheme, which can effectively solve the problem that the ventilation hole is easy to be blocked, realize the stable balance of the pressure in the gear box, and thus effectively ensure the sealing performance of the gear box and ensure its normal operation. UTILITY MODEL CONTENT

[0006] Therefore, the technical problem to be solved by the utility model is to provide an improved gear box device which can ensure smooth ventilation system, maintain the pressure balance inside the gear box and prevent the vent from being blocked by oil gas.

[0007] In order to solve the above problems, the utility model provides a gear box device which comprises a shell and a rotating part, and a first bearing and a second bearing are arranged between the shell and the rotating part. The shell is equipped with a ventilation system which has a vent opening towards the inside of the gear box, and the vent is arranged between the first bearing and the second bearing, and an oil blocking part is arranged on the radial inner side of the vent. The technical effect brought by this technical scheme is that the vent is arranged between the first bearing and the second bearing, and the low pressure characteristics formed in this area during work are utilized. According to the lubrication test results, the vent hole is in a high pressure area, and oil can easily enter the vent hole, finally blocking the vent valve and losing the ventilation function. Therefore, the vent is arranged in a low pressure area, reducing the amount of lubricating oil existing near the vent, and reducing the risk of the vent being blocked. In order to prevent oil from being thrown into the vent position under the action of the rotating centrifugal force of the rotor shaft, the oil blocking part is arranged on the radial inner side of the vent, which can effectively prevent the oil in the gear box from entering the vent, further ensuring the smoothness of the vent, ensuring that the ventilation system can work normally, maintaining the pressure balance inside the gear box, and thus ensuring the stable operation of the gear box device.

[0008] According to a preferred embodiment of this utility model, the oil baffle has a first flange and a second flange at its two ends in the axial direction, with the first flange abutting against the shoulder of the housing. Through the mutual abutment between the first flange and the housing shoulder, the oil baffle is stably positioned at one end in the axial direction. This effectively resists axial forces generated by internal component movement and external vibrations, ensuring the stability of the oil baffle in that axial direction. More preferably, the first flange protrudes radially outward by a certain dimension, and its edge shape is designed with a chamfer that matches the undercut of the housing shoulder. The radial protrusion increases the contact area between the first flange and the shoulder, making the connection between them more stable and enhancing the radial stability of the oil baffle. Furthermore, the chamfer allows the first flange to more smoothly engage with the shoulder, facilitating precise positioning during installation and better dispersing stress during operation, further improving the overall reliability of the oil baffle structure. Because the radial protrusion of the first flange increases the axial end area of ​​the oil baffle, a marking portion can be provided on the outer axial end face of the first flange. This marking portion can be used for information identification, such as marking key information like production date and production process parameters, facilitating quality traceability and management. Preferably, the second flange extends axially and abuts against the outer ring of the second bearing. Through direct contact between the second flange and the outer ring of the second bearing, the oil baffle is positioned at the other end of the axial direction. Thus, during operation, regardless of the movement of internal gearbox components or changes in force, this abutment structure effectively constrains the movement of the oil baffle in that axial direction. Working together with the first flange, it ensures that the oil baffle maintains a precise and stable position throughout the entire axial range, continuously and effectively preventing oil from entering the vent and maintaining unobstructed ventilation. Further preferably, the thickness of the second flange is designed to be less than the thickness of the oil baffle body. This reduces material usage while ensuring sufficient strength for the oil baffle, thereby lowering production costs. Meanwhile, when the second flange contacts the outer ring of the second bearing, its thinner thickness effectively reduces the friction between them, lowers the heat generated by friction, reduces component wear, and thus improves the operational stability and reliability of the entire gearbox assembly. Furthermore, it is also possible to consider extending the second flange axially and securing it with a retaining ring. The retaining ring's tightening action fixes the second flange axially. Under complex operating conditions such as vibration and impact, the retaining ring provides additional axial restraint, preventing axial displacement or loosening of the second flange due to stress. This further improves the axial stability of the oil baffle, ensuring it remains in the correct working position and continuously and effectively prevents oil from entering the vent.

[0009] According to a preferred embodiment of this utility model, a reinforcing rib is provided between the first flange and the second flange. The reinforcing rib, as a component to enhance structural strength, connects the first and second flanges. The reinforcing rib effectively distributes various external forces borne by the oil baffle, such as forces transmitted by oil impact and component movement, preventing deformation or damage to the oil baffle due to long-term stress. Since the oil baffle can be designed as a very thin ring, the reinforcing rib enhances its structural strength, ensuring that the oil baffle can stably and reliably perform its crucial role in preventing oil from entering the vent throughout its entire service life. Furthermore, it is preferable to design a positioning element on the second flange, such as an anti-rotation protrusion at the bottom of the oil baffle. During assembly, the positioning element can precisely cooperate with corresponding structures on other components, helping operators to quickly and accurately install the oil baffle into the predetermined position, greatly improving assembly accuracy and efficiency. Simultaneously, during gearbox operation, the positioning element effectively prevents the oil baffle from rotating or shifting, ensuring that the oil baffle is always in the correct working posture.

[0010] According to a preferred embodiment of this utility model, the oil baffle is made of either injection-molded or metal. This flexibility in material selection allows for adaptation to different working environments and performance requirements. When injection-molded parts are chosen, the advantages are lower production costs and lighter weight, which helps reduce the overall weight of the gearbox. Furthermore, the injection molding process allows for more complex shape and structural designs, facilitating the optimization of the oil baffle's performance. When metal parts are chosen, they possess high strength and excellent high-temperature resistance. Under harsh working conditions such as high temperature and high load, they maintain structural stability, effectively resisting deformation and damage, reliably preventing oil from entering the vent, ensuring the normal operation of the venting system, and guaranteeing the long-term stable operation of the gearbox. Attached Figure Description

[0011] The preferred embodiments of this utility model are further described below with reference to the accompanying drawings.

[0012] Figure 1 This is a partial cross-sectional view of the gearbox assembly;

[0013] Figure 2 This is a first-person perspective 3D view of the oil baffle.

[0014] Figure 3 This is a two-dimensional view of the oil baffle from a second perspective;

[0015] Figure 4 This is a partial cross-sectional view of the oil baffle.

[0016] In the figures, the same reference numerals indicate components with the same or similar functions. The directions such as "axial" and "radial" mentioned in this utility model are relative to the first and second bearings. Radial outward refers to the direction radially away from the bearing assembly, while radial inward refers to the direction radially towards the interior of the bearing assembly. Detailed Implementation

[0017] Figure 1 A partial cross-section of a gearbox assembly is shown, comprising a housing 1 and a rotating component 2. A first bearing 3 and a second bearing 4 are disposed between the housing 1 and the rotating component 2. A venting system 5 is provided on the housing 1, having a vent 51 opening towards the interior of the gearbox assembly. This vent 51 is located between the first bearing 3 and the second bearing 4. An oil baffle 6 is provided radially inward of the vent 51 to prevent oil from entering and clogging it. The housing 1, as the external structure of the gearbox assembly, provides support and protection for the internal components. It encloses the entire internal assembly of the gearbox, preventing the entry of foreign objects and ensuring that the internal components operate in a relatively stable environment. The rotating component 2 is torsionally connected to the gears, transmitting power from one component to another. Therefore, the first bearing 3 and the second bearing 4 rotate at high speed between the housing 1 and the rotating component 2 during operation, thereby creating a low-pressure area between the first bearing 3 and the second bearing 4. In this low-pressure area, there is no lubricating oil or only a very small amount of lubricating oil. Therefore, placing the vent 51 of the ventilation system 5 in this low-pressure area can effectively prevent the vent 51 from being blocked during operation. To further reduce the risk of the vent 51 being blocked by oil and gas, an oil baffle 6, preferably designed as an oil baffle ring, is added radially inside the vent 51. The oil baffle 6 non-sealedly covers the vent 51, preventing lubricating oil from entering the vent 51 while ensuring ventilation, thereby preventing the vent 51 from being blocked.

[0018] Figure 2 and Figure 3The three-dimensional structure of the oil baffle 6 is shown from different perspectives. The oil baffle 6 is designed as an oil baffle ring. The oil baffle 6 has a first flange 61 and a second flange 62 in the axial direction. The first flange 61 protrudes radially and is used to mate with a shoulder on the housing 1 to fix the oil baffle 6 at one end in the axial direction. This design allows the oil baffle 6 to better mate with the housing 1, and the abutment with the shoulder ensures the positional stability of the oil baffle 6 during operation. The second flange 62 extends outward in the axial direction and can abut against the outer ring of the second bearing 4, thereby fixing the position of the oil baffle 6 in the axial direction and preventing the oil baffle 6 from moving in the axial direction; the second flange 62 may also be fixed by a retaining ring, which presses against the second flange 62 to fix the oil baffle 6 at the other end in the axial direction. Because the oil baffle 6 is particularly thin, a reinforcing rib 63 is preferably added between the first flange 61 and the second flange 62 to enhance the overall structural strength of the oil baffle 6, prevent deformation or damage due to various forces during long-term use, and ensure that the oil baffle 6 can continuously and effectively perform its oil-blocking function. Since the first flange 61 protrudes radially, the axial end face of the oil baffle on the first flange 61 side will have a large area. Therefore, a marking portion 65 can be provided on this axial outer end face, which may be used for quality inspection and assembly marking during the production process, such as marking production date information. Preferably, a positioning member 64 is provided on the second flange. Its function is to help determine the correct position of the oil baffle 6 during assembly, ensure accurate matching of the oil baffle 6 with other components, improve assembly efficiency and accuracy, and also prevent rotation of the oil baffle 6, better fixing the oil baffle 6 in the working position.

[0019] Figure 4 A cross-sectional view of the oil baffle 6 is shown, allowing for a clearer view of its structural features. The first flange 61 protrudes radially and has a chamfer corresponding to the undercut of the shoulder on the housing 1. The thickness 'a' of the second flange 62 is less than the thickness 'b' of the main body of the oil baffle 6. This design helps optimize the structure of the oil baffle 6, saving material and space while maintaining its function, and also facilitates better cooperation between the oil baffle ring 6 and other components during assembly. In this embodiment, the second flange 62 extends and abuts against the outer ring of the second bearing 4; therefore, designing the second flange 62 to be thinner also reduces the frictional force between it and the second bearing 4.

[0020] While possible embodiments have been described exemplarily in the foregoing description, it should be understood that numerous variations of the embodiments exist through combinations of all known and readily conceived technical features and implementation methods. Furthermore, it should be understood that the exemplary embodiments are merely examples and do not in any way limit the scope, application, or construction of this invention. For instance, the specific shapes of the axial and radial segments can also have many variations. The foregoing description is more of a technical guide for those skilled in the art to transform at least one exemplary embodiment, wherein various changes can be made, particularly regarding changes to the function and structure of the components, without departing from the scope of the claims.

[0021] List of reference signs

[0022] 1. Shell

[0023] 2 Rotating parts

[0024] 3 First bearing

[0025] 4 Second bearing

[0026] 5. Ventilation system

[0027] 51 Vent

[0028] 6 oil baffles

[0029] 61 First flange

[0030] 62 Second flange

[0031] 63 Reinforcing Ribs

[0032] 64 Positioning components

[0033] 65 Marking section

Claims

1. A gearbox assembly comprising a housing (1) and a rotating member (2), wherein a first bearing (3) and a second bearing (4) are provided between the housing (1) and the rotating member (2), wherein, A ventilation system (5) is provided on the housing (1), the ventilation system (5) having a vent (51) opening toward the inside of the gearbox device, wherein the vent (51) is disposed between the first bearing (3) and the second bearing (4), wherein an oil baffle (6) is provided on the radially inner side of the vent (51), the oil baffle (6) being used to prevent oil in the gearbox device from entering the vent (51).

2. The gearbox device according to claim 1, characterized in that, The oil baffle (6) has a first flange (61) and a second flange (62) for axial fixation at both ends of the axial direction, wherein the first flange (61) abuts against the shoulder of the housing (1).

3. The gearbox device according to claim 2, characterized in that, The first flange (61) protrudes radially and has a chamfer corresponding to the undercut of the shoulder.

4. The gearbox device according to claim 3, characterized in that, A marking portion (65) is provided on the axially outer end face of the first flange (61).

5. The gearbox device according to claim 2, characterized in that, The second flange (62) extends axially and abuts against the outer ring of the second bearing (4).

6. The gearbox device according to claim 5, characterized in that, The thickness (a) of the second flange (62) is less than the thickness (b) of the main body of the oil baffle (6).

7. The gearbox device according to claim 2, characterized in that, The second flange (62) extends axially and is secured by a retaining ring.

8. The gearbox device according to any one of claims 2 to 7, characterized in that, A reinforcing rib (63) is provided between the first flange (61) and the second flange (62).

9. The gearbox device according to any one of claims 2 to 7, characterized in that, A positioning element (64) is provided on the second flange (62).

10. The gearbox device according to any one of claims 1 to 7, characterized in that, The oil baffle (6) is an injection molded part or a metal part.

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