Gearbox and vehicle having the same

Abstract

The present invention provides a gearbox and a vehicle having the same. The gearbox includes: a box body having an accommodation cavity with a first gas-liquid channel, and a second gas-liquid channel is provided in the side wall of the box body; a driving assembly disposed in the accommodation cavity; a cover, a part of the cover extends circumferentially along the box body and is connected to the driving assembly; a ventilation piston movably disposed in the accommodation cavity. In this application, when the gas pressure is too high, the gas entering from the first gas-liquid channel can drive the ventilation piston to move in the first direction, so as to drive the cover to move from the sealed position to the exhaust position by the driving assembly, so that the gas entering from the first gas-liquid channel passes through the accommodation cavity, the second gas-liquid channel and the space formed by the cover and the box body in sequence and is discharged outside the box body, effectively increasing the smoothness of the gas-liquid channel in the box body, ensuring the gas discharge in the box body, and preventing the gearbox from being damaged due to too large gas pressure difference inside and outside the box body.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular, to a gearbox and a vehicle having the same. Background Art

[0002] Gearbox structures such as automatic transmissions, manual transmissions, and speed reducers are core components of modern automotive drive systems. Their main function is to vary the speed and torque of the power from the drive source and output it to the wheel end. Their basic structure is to enclose the internal moving parts with a housing to isolate them from the external environment. Since a large amount of heat is generated inside the gearbox during operation, a ventilation structure such as a breather plug is required to achieve the balance of the pressure difference inside and outside the box, to avoid damaging the rubber seals and causing leakage of the lubricating oil.

[0003] In addition to ensuring the balance of the pressure difference inside and outside the box, the ventilation structure should also prevent the ejection of oil and gas mists or the direct ejection of lubricating oil when the pressure is too high, so as to avoid contaminating the vehicle engine compartment and reducing the internal lubricating oil of the gearbox. At the same time, it is also necessary to ensure that water does not enter at the ventilation structure under complex road conditions such as when the vehicle wades through water, so as not to damage the performance of the gearbox.

[0004] The traditional ventilation structure design mainly relies on a complex "labyrinth" design of the gearbox housing. The breather plug body is relatively simple, the housing structure is complex and limited by the space layout, and the actual oil and gas cooling effect is not good. Or simply rely on a relatively complex gas path design inside the breather plug body to improve the cooling effect of the oil and gas. However, due to the limited space of the breather plug itself, the actual situation is very unsatisfactory. Therefore, at present, the gearbox ventilation structure mainly realizes passive oil and gas cooling separation by increasing the length and complexity of the oil and gas outflow path. Due to the limitation of the overall box temperature, the separation effect is not good, and a large amount of oil and gas mists are still ejected under many extreme working conditions, resulting in engine compartment pollution and reduction of lubricating oil. Summary of the Invention

[0005] The main object of the present invention is to provide a gearbox and a vehicle having the same, so as to solve the problem that the gearbox is damaged due to too large pressure difference between the inside and outside of the box in the prior art.

[0006] To achieve the above object, according to one aspect of the present invention, a gearbox is provided, comprising: a box body having a receiving cavity with a first gas-liquid channel, and a second gas-liquid channel is provided in the side wall of the box body; a driving assembly disposed in the receiving cavity; a cover, a part of the cover extends circumferentially along the box body, the cover is connected to the driving assembly, the cover has a sealing position in contact with the box body, and the cover has an exhaust position spaced from the box body; a vent piston movably disposed in the receiving cavity, the vent piston is connected to the driving assembly; wherein, the gas entering from the first gas-liquid channel can drive the vent piston to move in a first direction, so as to drive the cover to move from the sealing position to the exhaust position by the driving assembly, so that the gas entering from the first gas-liquid channel sequentially passes through the receiving cavity, the second gas-liquid channel and the space formed between the cover and the box body and is discharged outside the box body.

[0007] Further, at least a part of the second gas-liquid channel extends spirally along the circumference of the box body.

[0008] Further, there are a plurality of second gas-liquid channels.

[0009] Further, when the cover is in the exhaust position, a communication channel communicating with the second gas-liquid channel is formed between the surface of the vent piston facing the first gas-liquid channel and a part of the wall surface of the receiving cavity.

[0010] Further, the driving assembly includes a worm gear assembly, and the worm gear assembly includes: a worm disposed in the receiving cavity, the first end of the worm is connected to the vent piston, and the second end of the worm is connected to the box body; a worm gear disposed in the receiving cavity, the worm gear is meshed with the worm, and the cover is connected to the worm gear.

[0011] Further, the cover includes: a cover body which is a barrel-shaped structure, the side wall of the cover body extends along the outer peripheral side of the box body, the edge of the open side of the cover body has a sealing position in contact with the box body, and the edge of the open side of the cover body has an exhaust position spaced from the box body; a connecting rod, the first end of the connecting rod is connected to the cover body, and the second end of the connecting rod extends into the receiving cavity and is connected to the worm gear.

[0012] Further, at least one exhaust air duct communicating with the second gas-liquid channel is provided on the cover.

[0013] Further, a plurality of exhaust holes are circumferentially distributed on the exhaust air duct.

[0014] Further, an annular flange is provided on the outer periphery of the box body, the cover has a sealing position in contact with the annular flange, and the cover has an exhaust position away from the annular flange.

[0015] According to another aspect of the present invention, a vehicle is provided, including a gearbox, and the gearbox is the above-mentioned gearbox.

[0016] Applying the technical solution of the present invention, when the gas pressure is too high, the gas entering from the first gas-liquid channel can drive the ventilation piston to move in the first direction, so as to drive the worm gear assembly to drive the cover to move from the sealed position to the exhaust position, so that the gas entering from the first gas-liquid channel passes through the accommodation cavity, the second gas-liquid channel and the space formed by the cover and the box body in sequence and is discharged outside the box body, effectively increasing the smoothness of the gas-liquid channel in the box body, ensuring the gas discharge in the box body, and preventing the gear box from being damaged due to too large gas pressure difference inside and outside the box body. Brief Description of the Drawings

[0017] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0018] Figure 1 Shows a schematic structural diagram of a first embodiment of a gear box according to the present invention;

[0019] Figure 2 Shows a schematic structural diagram of a second embodiment of a gear box according to the present invention.

[0020] Among them, the above-mentioned drawings include the following reference numerals:

[0021] 10. Box body; 101. Annular flange; 11. Accommodation cavity; 12. Sealing ring; 13. Second gas-liquid channel; 14. Worm gear assembly; 140. Worm; 141. Worm wheel; 15. Ventilation piston; 16. Sealing ring; 17. Exhaust air duct; 18. Exhaust hole;

[0022] 20. First gas-liquid channel;

[0023] 30. Cover; 31. Link; 32. Cover body. Detailed Embodiments

[0024] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0026] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0027] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and thus their description will be omitted.

[0028] Combined with Figures 1 to 2 As shown, according to a specific embodiment of the present application, a gearbox is provided.

[0029] Specifically, a gearbox includes: a housing 10, the housing 10 has a receiving cavity 11, the receiving cavity 11 has a first gas-liquid passage 20, and a second gas-liquid passage 13 is provided in the side wall of the housing 10; a driving assembly, the driving assembly is arranged in the receiving cavity 11; a cover 30, a part of the cover 30 extends along the circumferential direction of the housing 10, the cover 30 is connected to the driving assembly, the cover 30 has a sealing position in contact with the housing 10, and the cover 30 has an exhaust position spaced from the housing 10; a ventilation piston 15, the ventilation piston 15 is movably arranged in the receiving cavity 11, and the ventilation piston 15 is connected to the driving assembly; wherein, the gas entering from the first gas-liquid passage 20 can drive the ventilation piston 15 to move in a first direction, so as to drive the driving assembly to drive the cover 30 to move from the sealing position to the exhaust position, so that the gas entering from the first gas-liquid passage 20 sequentially passes through the receiving cavity 11, the second gas-liquid passage 13 and the gap formed between the cover 30 and the housing 10 and is discharged out of the housing 10.

[0030] In this embodiment, when the gas pressure is too high, the gas entering from the first gas-liquid passage 20 can drive the ventilation piston in the first direction (such as Figure 1As shown, the first direction is vertically upward. It moves to drive the component to drive the cover from the sealed position to the exhaust position, so that the gas entering from the first gas-liquid channel 20 passes through the accommodation chamber, the second gas-liquid channel, and the space formed between the cover and the box body in sequence and is discharged outside the box body. This effectively increases the smoothness of the gas-liquid channels in the box body, ensures the gas discharge in the box body, prevents the gearbox from being damaged due to excessive gas pressure difference inside and outside the box body. The driving component can also be a cooperation mode of a gear and a rack.

[0031] Furthermore, at least part of the second gas-liquid channel 13 extends spirally along the circumferential direction of the box body 10. In this embodiment, by setting at least part of the second gas-liquid channel 13 as a spiral air channel, it ensures that the ventilation air path is long and narrow, and also ensures that the condensed oil can flow back to the gearbox body. And the spiral air channel can also adopt other similar spiral air path designs, such as double spiral, intermittent spiral, etc.

[0032] Specifically, there are multiple second gas-liquid channels 13. Such a setting ensures the smoothness of the gas-liquid channels, and the structure is long and narrow, which increases the condensation time of the oil and gas, so that the oil and gas have enough time to condense into oil and flow back into the gearbox.

[0033] In another embodiment of the present application, when the cover 30 is in the exhaust position, a communication channel connecting the second gas-liquid channel 13 is formed between the surface of the ventilation piston 15 facing the first gas-liquid channel 20 and part of the wall surface of the accommodation chamber 11. Such a setting can allow the gas to flow into the second gas-liquid channel when the gas pressure in the first gas-liquid channel 20 is too high, effectively preventing the gearbox from being damaged due to excessive gas pressure difference inside and outside the box body. When the cover 30 is not in the exhaust position, the gas pressure in the first gas-liquid channel 20 is stable, and the ventilation piston 15 and the wall surface of the accommodation chamber 11 are sealed by a sealing ring 12.

[0034] Furthermore, the driving component includes a worm gear assembly. The worm gear assembly 14 includes: a worm 140, the worm 140 is arranged in the accommodation chamber 11, the first end of the worm 140 is connected to the ventilation piston 15, and the second end of the worm 140 is connected to the box body 10; a worm gear 141, the worm gear 141 is arranged in the accommodation chamber 11, the worm gear 141 is meshed with the worm 140, and the cover 30 is connected to the worm gear 141. In this embodiment, the worm 140 and the ventilation piston 15 are in threaded cooperation to realize the rotation of the worm 140. When the ventilation structure of the gearbox is in a situation where the vehicle wades in deep water, it is very easy for water to enter the ventilation structure. The self-locking function of the worm gear is adopted to ensure the sealing performance of the ventilation structure.

[0035] As Figure 1As shown in the figure, the cover 30 includes: a cover body 32, the cover body 32 is in a barrel shape, the side wall of the cover body 32 extends along the outer peripheral side of the box body 10, the edge of the opening side of the cover body 32 has a sealing position in contact with the box body 10, and the edge of the opening side of the cover body 32 has an exhaust position spaced from the box body 10; a connecting rod 31, the first end of the connecting rod 31 is connected to the cover body 32, and the second end of the connecting rod 31 extends into the accommodation cavity 11 and is connected to the worm gear 141. In this embodiment, the connecting rod and the inner wall of the accommodation cavity are sealed by a sealing ring 12. Such a setting enables the worm gear assembly to drive the cover to be in the exhaust position, so that the gas accumulated in the box body is discharged from the box body 10, effectively preventing the gear box from being damaged due to excessive gas pressure difference inside and outside the box body.

[0036] Further, at least one exhaust air duct 17 communicating with the second gas-liquid channel 13 is provided on the cover 30. Such a setting enables the gas in the second gas-liquid channel 13 to be evenly distributed in the exhaust air duct 17, preventing damage to the box body caused by excessive gas pressure due to uneven gas distribution.

[0037] Specifically, a plurality of exhaust holes 18 are circumferentially distributed on the exhaust air duct 17. This enables the gas in the exhaust air duct to be evenly discharged from the box body, increasing the exhaust efficiency.

[0038] As Figure 2 shown in the figure, an annular flange 101 is provided on the outer periphery of the box body 10, the cover 30 has a sealing position in contact with the annular flange 101, and the cover 30 has an exhaust position away from the annular flange 101. In this embodiment, the sealing position where the cover 30 is in contact with the annular flange 101 is sealed by a sealing ring 16, effectively increasing the sealing effect to prevent external moisture from entering the box body, and at the same time effectively improving the exhaust efficiency.

[0039] In another embodiment of the present application, when the pressure in the accommodation cavity 11 is too high, the pressure will push the ventilation piston 15 upward. Through the threaded cooperation between the worm 140 and the ventilation piston 15, the worm rotates, driving the worm gear 141 to rotate counterclockwise, lifting the connecting rod 31 and the cover body 32. The gas in the gear box then enters the upper exhaust air duct 17 through the second gas-liquid channel, and through the gap between the connecting rod 31 and the cover body 32, the pressure in the gear box is adjusted. When the pressure in the accommodation cavity 11 returns to normal, the ventilation piston 15 will move downward under the action of gravity, driving the worm and worm gear to rotate in the reverse direction, realizing the sealing of the gear box. The cooling oil in the second gas-liquid channel 13 will flow back into the gear box.

[0040] In another embodiment of the present application, for the sealing of the three sealing structures, different sealing forms can be adopted, so that the three-stage sealing ensures that when the internal air pressure of the gear box is stable, external moisture cannot enter the gear box.

[0041] In another embodiment of the present application, a vehicle is further provided, which includes a gearbox, and the gearbox is the gearbox in the above embodiment.

[0042] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the drawing is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0043] In addition to the above, it should also be noted that the "one embodiment", "another embodiment", "embodiment" etc. mentioned in this specification refer to the specific features, structures or characteristics described in connection with that embodiment being included in at least one embodiment generally described in the present application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any one embodiment, it is intended that implementing such feature, structure or characteristic in combination with other embodiments also falls within the scope of the present invention.

[0044] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A gearbox, characterized in that, Comprising: A box body (10), the box body (10) having an accommodation cavity (11), the accommodation cavity (11) having a first gas-liquid channel (20), and a second gas-liquid channel (13) being provided in the side wall of the box body (10); A driving assembly, the driving assembly being arranged in the accommodation cavity (11); A cover (30), a part of the cover (30) extending along the circumferential direction of the box body (10), the cover (30) being connected to the driving assembly, the cover (30) having a sealing position in contact with the box body (10), and the cover (30) having an exhaust position spaced from the box body (10); A ventilation piston (15), the ventilation piston (15) being movably arranged in the accommodation cavity (11), the ventilation piston (15) being connected to the driving assembly; Wherein, the gas entering from the first gas-liquid channel (20) can drive the ventilation piston (15) to move in a first direction, so as to drive the driving assembly to drive the cover (30) to move from the sealing position to the exhaust position, so that the gas entering from the first gas-liquid channel (20) sequentially passes through the accommodation cavity (11), the second gas-liquid channel (13) and the gap formed between the cover (30) and the box body (10) and is discharged outside the box body (10); The driving assembly includes a worm gear assembly (14), and the worm gear assembly (14) includes: A worm (140), the worm (140) being arranged in the accommodation cavity (11), a first end of the worm (140) being connected to the ventilation piston (15), and a second end of the worm (140) being connected to the box body (10); A worm gear (141), the worm gear (141) being arranged in the accommodation cavity (11), the worm gear (141) being meshed with the worm (140), and the cover (30) being connected to the worm gear (141).

2. The gearbox according to claim 1, wherein, At least a part of the second gas-liquid channel (13) extends spirally along the circumferential direction of the box body (10).

3. The gearbox according to claim 1 or 2, characterized in that, There are a plurality of the second gas-liquid channels (13).

4. The gearbox according to claim 1, characterized in that, When the cover (30) is in the exhaust position, a communication channel communicating with the second gas-liquid channel (13) is formed between the surface of the ventilation piston (15) on the side facing the first gas-liquid channel (20) and a part of the wall surface of the accommodation cavity (11).

5. The gearbox according to claim 1, characterized in that, The cover (30) includes: A cover body (32), the cover body (32) being of a barrel-shaped structure, the side wall of the cover body (32) extending along the outer peripheral side of the box body (10), the edge of the opening side of the cover body (32) having the sealing position in contact with the box body (10), and the edge of the opening side of the cover body (32) having the exhaust position spaced from the box body (10); A connecting rod (31), a first end of the connecting rod (31) being connected to the cover body (32), and a second end of the connecting rod (31) extending into the accommodation cavity (11) and being connected to the worm gear (141).

6. The gearbox according to claim 5, characterized in that, At least one exhaust air passage (17) communicating with the second gas-liquid passage (13) is formed in the cover (30).

7. The gearbox according to claim 6, characterized in that, A plurality of exhaust holes (18) are circumferentially distributed in the exhaust air passage (17).

8. The gearbox according to claim 1, characterized in that, An annular flange (101) is provided on the outer periphery of the box body (10), the cover (30) has the sealing position abutting against the annular flange (101), and the cover (30) has the exhaust position away from the annular flange (101).

9. A vehicle, comprising a gearbox, characterized in that, The gearbox is the gearbox according to any one of claims 1 to 8.

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