Gearbox and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to a gearbox and a vehicle, the gearbox comprises a shell, an input shaft, an output shaft, a planet wheel set, a clutch and an output gear, the input shaft and the output shaft are coaxially and rotatably arranged in the shell, a sun wheel of the planet wheel set is fixedly connected with the input shaft, and a planet carrier is coaxially and fixedly connected with the output shaft; the clutch can connect or disconnect the gear ring and the shell and comprises a gear oil cylinder, the gear oil cylinder comprises a supporting cover and a limiting convex ring arranged on the supporting cover, the supporting cover is fixedly connected with the shell so that the shell can be divided into a first cavity and a second cavity, the planet wheel set is located in the first cavity, the limiting convex ring is in clearance fit with the gear ring in the axial direction of the gear ring, and the planet wheel set is located in the second cavity. The supporting cover is provided with a flow guide structure, and the output shaft is fixedly connected with the output gear in the second cavity. A part of oil located on the supporting cover in the second cavity can flow to a gap between the limiting convex ring and the gear ring through the flow guide structure; therefore, the lubricating effect between the limiting convex ring and the gear ring is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a gearbox and a vehicle. Background Art

[0002] The gearbox is one of the key components of the power system of construction machinery and is a mechanism used to change the rotational speed and torque from the power source.

[0003] The existing gearbox generally includes a housing, an input shaft, a planetary gear set, a clutch, an output shaft and an output gear. The input shaft and the output shaft are both rotatably arranged coaxially in the housing. The planetary gear set includes a sun gear fixedly sleeved on the input shaft, a ring gear, a planetary gear meshing with both the sun gear and the ring gear, and a planet carrier supporting the planetary gear. The planet carrier is fixedly connected coaxially with the output shaft. The clutch includes a piston, a friction pair, a gear position oil cylinder and a stop block. The gear position oil cylinder is fixedly arranged on the housing. The gear position oil cylinder is provided with a communicating piston cavity and an oil inlet. The piston is slidably arranged in the piston cavity. The friction pair is connected with the ring gear. The friction pair is located between the piston and the stop block. The piston can push the friction pair to abut against the stop block so that the relative position of the ring gear and the housing is fixed to engage a gear position, connect the input shaft and the output shaft in transmission, and then drive the output gear on the output shaft to rotate.

[0004] Among them, the gear position oil cylinder is fixedly connected with the housing. The gear position oil cylinder includes a support cover. The support cover is provided with a limiting convex ring. The limiting convex ring is in clearance fit with the side wall of the ring gear to realize the limitation of the ring gear. The limiting convex ring mainly relies on the lubricating oil overflowing from the friction pair to realize the lubrication between the limiting convex ring and the ring gear. When the gearbox operates under relatively harsh working conditions (such as a high slope) for a long time, the ring gear will continuously contact and move relative to the limiting convex ring under the action of gravity. Due to the inclination of the gearbox, the accumulation amount of lubricating oil between the limiting convex ring and the ring gear decreases. At the same time, when the working ground is bumpy, it is easy to cause the lubrication effect between the limiting convex ring and the ring gear to decrease and the durability performance of the gear position oil cylinder to decline.

[0005] Therefore, there is an urgent need for a gearbox to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a gearbox and a vehicle to solve the problem in the related technology that when the vehicle is in relatively harsh road conditions, the accumulation amount of lubricating oil between the limiting convex ring on the gear position oil cylinder and the ring gear of the clutch decreases, thereby resulting in a decrease in the lubrication effect between the limiting convex ring and the ring gear and a decline in the durability performance of the gear position oil cylinder.

[0007] On the one hand, the utility model provides a gearbox, which includes:

[0008] A housing:

[0009] An input shaft and an output shaft, both the input shaft and the output shaft are rotatably arranged coaxially in the housing;

[0010] A planetary gear set, wherein the sun gear of the planetary gear set is fixedly connected coaxially with the input shaft, and the planet carrier of the planetary gear set is fixedly connected coaxially with the output shaft;

[0011] A clutch capable of connecting or disconnecting the ring gear of the planetary gear set from the housing. The clutch includes a gear position oil cylinder, and the gear position oil cylinder includes a support cover and a limiting convex ring arranged on one side of the support cover. The support cover is fixedly connected with the housing to divide the housing into a first cavity and a second cavity. The planetary gear set is located in the first cavity. Along the axial direction of the ring gear, the limiting convex ring is in clearance fit with the ring gear. The support cover is provided with a flow guiding structure, and part of the oil fluid in the second cavity located on the support cover can flow to the gap between the limiting convex ring and the ring gear through the flow guiding structure;

[0012] An output gear, and the output shaft passes through the support cover and is fixedly connected with the output gear in the second cavity.

[0013] As a preferred technical solution of the transmission, the flow guiding structure includes an oil passing hole and an oil storage groove arranged on the support cover. The oil passing hole can lead the oil fluid in the second cavity to the first cavity. The support cover is recessed with an annular oil storage groove around the input shaft between the limiting convex ring and the oil passing hole.

[0014] As a preferred technical solution of the transmission, the limiting convex ring is sleeved on the ring gear and is in clearance fit with the ring gear. A limiting outer edge protrudes from the outer peripheral wall of the ring gear on the side of the limiting convex ring away from the support cover, and the limiting convex ring is in clearance fit with the limiting outer edge.

[0015] As a preferred technical solution of the transmission, the side of the ring gear close to the support cover is in clearance fit with the limiting convex ring.

[0016] As a preferred technical solution of the transmission, the first end of the oil passing hole faces the first cavity, and the second end of the oil passing hole faces the second cavity;

[0017] Along the direction of gravity, the distance from the second end of the oil passing hole to the ground is greater than the distance from the first end of the oil passing hole to the ground.

[0018] As a preferred technical solution of the transmission, the flow guiding structure includes an oil passing hole. One end of the oil passing hole faces the ring gear in the first cavity, and the second end of the oil passing hole faces the second cavity.

[0019] As a preferred technical solution of the transmission, the side of the ring gear close to the support cover is in clearance fit with the limiting convex ring.

[0020] As an optimal technical solution for the gearbox, the gear cylinder also includes an inner ring protruding from the support cover, the inner ring is sleeved on the gear ring and is loosely fitted with the gear ring, a limiting outer edge is protruded from the outer peripheral wall of the gear ring along the side of the inner ring away from the support cover, the inner ring is loosely fitted with the limiting outer edge, and the area where the gear ring is located between the limiting protruding ring and the inner ring is opposite to the first end of the oil hole.

[0021] As an optimal technical solution for the gearbox, the gear cylinder is an integrally formed part.

[0022] On the other hand, the present invention provides a vehicle, comprising the gearbox in any of the above solutions.

[0023] The beneficial effects of the utility model are:

[0024] The utility model provides a transmission and a vehicle, the transmission comprising a housing, an input shaft, an output shaft, a planetary gear set, a clutch, and an output gear. The input shaft and the output shaft are coaxially rotatably disposed within the housing. The sun gear of the planetary gear set is coaxially fixedly coupled to the input shaft, and the planetary carrier of the planetary gear set is coaxially fixedly coupled to the output shaft. The clutch can connect or disconnect the ring gear of the planetary gear set from the housing. The clutch comprises a shift oil cylinder, which comprises a support cover and a limiting protrusion disposed on one side of the support cover. The support cover is fixedly coupled to the housing to divide the housing into a first cavity and a second cavity. The planetary gear set is located in the first cavity. The limiting protrusion is clearance-matched with the ring gear along the axial direction of the ring gear. The support cover is provided with a flow guide structure. Part of the oil in the second cavity located on the support cover can flow through the flow guide structure to the gap between the limiting protrusion and the ring gear. The output shaft passes through the support cover and is fixedly coupled to the output gear within the second cavity. When the transmission is in operation, the ring gear and the housing are connected by the clutch, at which time the power of the input shaft can be transmitted to the power of the output shaft. The rotation of the output gear on the output shaft causes the oil in the transmission to splash onto the housing and support cover. The oil then flows under the force of gravity, causing some of the oil on the housing to flow onto the support cover. At the same time, after merging with the oil on the support cover, this oil flows on the support cover under the force of gravity, allowing some of the oil on the support cover to enter the first cavity through the flow guide structure and then flow into the gap between the stop collar and the ring gear. When the vehicle is traveling on harsh roads, the oil flowing into the gap between the stop collar and the ring gear can lubricate the relative movement between the stop collar and the ring gear, thereby increasing the amount of oil accumulated between the stop collar on the gear cylinder and the clutch ring gear, thereby improving the lubrication between the stop collar and the ring gear and enhancing the durability of the gear cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of a gearbox in the prior art;

[0026] Figure 2 is Figure 1 a partial enlarged view of position A in

[0027] Figure 3 a cross-sectional view of the transmission in the first embodiment of the present utility model;

[0028] Figure 4 a cross-sectional view of the gear shift cylinder in the first embodiment of the present utility model;

[0029] Figure 5 a cross-sectional view of the transmission in the second embodiment of the present utility model;

[0030] Figure 6 a cross-sectional view of the gear shift cylinder in the second embodiment of the present utility model.

[0031] In the figure:

[0032] 1. Housing; 11. First cavity; 12. Second cavity;

[0033] 21. Input shaft; 22. Output shaft;

[0034] 31. Sun gear; 32. Planet carrier; 33. Ring gear; 331. Limiting outer edge; 34. Planet gear;

[0035] 41. Gear shift cylinder; 411. Support cover; 4111. Flow guiding structure; 4112. Oil through hole; 4113. Oil storage tank; 412. Limiting convex ring; 413. Inner ring; 414. Outer ring; 415. Piston cavity; 42. Piston; 43. Friction pair; 44. Stop block;

[0036] 5. Output gear. Specific embodiments

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0039] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0041] Embodiment 1

[0042] Such as Figure 1 And Figure 2As shown in the figure, the existing transmission usually includes a housing 1, an input shaft 21, a planetary gear set, a clutch, an output shaft 22 and an output gear 5. The input shaft 21 and the output shaft 22 are both rotatably arranged coaxially within the housing 1. The planetary gear set includes a sun gear 31 fixedly sleeved on the input shaft 21, a ring gear 33, a planetary gear 34 meshing with both the sun gear 31 and the ring gear 33, and a planet carrier 32 supporting the planetary gear 34. The planet carrier 32 is fixedly connected coaxially with the output shaft 22. The clutch includes a piston 42, a friction pair 43, a gear position oil cylinder 41 and a stop block 44. The gear position oil cylinder 41 is fixedly arranged on the housing 1. The gear position oil cylinder 41 is provided with a communicating piston chamber 415 and an oil inlet. The piston 42 is slidably arranged within the piston chamber 415. The friction pair 43 is connected to the ring gear 33. The friction pair 43 is located between the piston 42 and the stop block 44. Oil is injected into the piston chamber 415 through the oil inlet, so that the piston 42 can push the friction pair 43 towards the stop block 44, making the relative position of the ring gear 33 and the stop block 44 fixed, to engage the gear position, connect the input shaft 21 and the output shaft 22 for transmission, and then drive the output gear 5 on the output shaft 22 to rotate.

[0043] The piston chamber 415 can be formed by enclosing an inner ring 413, an outer ring 414 and a support cover 411 provided on the support cover 411. Optionally, the limiting convex ring 412 is the inner ring 413 or is arranged coaxially with the inner ring 413.

[0044] Among them, the gear position oil cylinder 41 is fixedly connected to the housing 1. The gear position oil cylinder 41 includes a support cover 411. The support cover 411 is provided with a limiting convex ring 412. The limiting convex ring 412 is in clearance fit with the side wall of the ring gear 33 to prevent the ring gear 33 from moving axially along the ring gear 33 towards one side of the limiting convex ring 412, so as to realize the limitation of the ring gear 33. The limiting convex ring 412 mainly relies on the lubricating oil overflowing from the friction pair 43 to lubricate between the limiting convex ring 412 and the ring gear 33. When the transmission operates under relatively harsh working conditions for a long time, such as on a high slope, the ring gear 33 will continuously contact and move relative to the limiting convex ring 412 under the action of gravity. Due to the inclination of the transmission, the amount of lubricating oil accumulated between the limiting convex ring 412 and the ring gear 33 decreases. At the same time, when the working ground is bumpy, it is easy to cause the lubrication effect between the limiting convex ring 412 and the ring gear 33 to decrease, and the durability performance of the gear position oil cylinder 41 to decline.

[0045] To solve the above problems, such as Figures 3 to 4As shown in the figure, this embodiment provides a transmission, which includes a housing 1, an input shaft 21, an output shaft 22, a planetary gear set, a clutch, and an output gear 5. The input shaft 21 and the output shaft 22 are both rotatably arranged coaxially within the housing 1. The sun gear 31 of the planetary gear set is fixedly connected coaxially with the input shaft 21, and the planet carrier 32 of the planetary gear set is fixedly connected coaxially with the output shaft 22. The clutch can connect or disconnect the ring gear 33 of the planetary gear set from the housing 1. The clutch includes a gear position oil cylinder 41, and the gear position oil cylinder 41 includes a support cover 411 and a limit convex ring 412 arranged on one side of the support cover 411. The support cover 411 is fixedly connected to the housing 1 to divide the housing 1 into a first cavity 11 and a second cavity 12. The planetary gear set is located in the first cavity 11. Along the axial direction of the ring gear 33, the limit convex ring 412 is in clearance fit with the ring gear 33. The support cover 411 is provided with a flow guiding structure 4111, and part of the oil in the second cavity 12 located on the support cover 411 can flow to the gap between the limit convex ring 412 and the ring gear 33 through the flow guiding structure 4111. The output shaft 22 passes through the support cover 411 and is fixedly connected to the output gear 5 in the second cavity 12. When the transmission works, the ring gear 33 and the housing 1 are connected through the clutch. At this time, the power of the input shaft 21 can be transmitted to the power of the output shaft 22. Due to the rotation of the output gear 5 on the output shaft 22, the oil in the second cavity 12 is splashed. The oil splashes onto the housing 1 and the support cover 411, and the oil flows under the action of gravity, so that part of the oil on the housing 1 flows to the support cover 411. At the same time, after the oil converges with the oil on the support cover 411, it flows on the support cover 411 under the action of gravity, so that part of the oil on the support cover 411 enters the first cavity 11 through the flow guiding structure 4111 and then flows to the gap between the limit convex ring 412 and the ring gear 33. When the vehicle is driving on a rough road surface, the oil flowing to the gap between the limit convex ring 412 and the ring gear 33 can lubricate the relative movement between the limit convex ring 412 and the ring gear 33 flowing to the gap. As a result, the oil accumulation amount between the limit convex ring 412 and the ring gear 33 on the gear position oil cylinder 41 increases, thereby improving the lubrication effect between the limit convex ring 412 and the ring gear 33 and enhancing the durability performance of the gear position oil cylinder 41.

[0046] Optionally, the diversion structure 4111 includes an oil passage hole 4112 and an oil storage groove 4113 provided on the support cover 411. The oil passage hole 4112 can lead the oil in the second cavity 12 into the first cavity 11. The support cover 411 is recessed with an annular oil storage groove 4113 around the input shaft 21 between the limit convex ring 412 and the oil passage hole 4112. In this embodiment, the oil in the second cavity 12 on the support cover 411 flows on the support cover 411 under the action of gravity, so that part of the oil flows into the first cavity 11 through the oil passage hole 4112. The oil in the first cavity 11 flows to the bottom area of the oil storage groove 4113 under the action of gravity. As the oil in the bottom area of the oil storage groove 4113 gradually accumulates, it will overflow the oil storage groove 4113, and then flow along the limit convex ring 412 to the gap between the gear ring 33 and the limit convex ring 412, finally improving the lubrication effect between the limit convex ring 412 and the gear ring 33.

[0047] Optionally, the limit convex ring 412 is sleeved on the gear ring 33 and is in clearance fit with the gear ring 33. A limit outer edge 331 is convexly provided on the outer peripheral wall of the gear ring 33 on the side away from the support cover 411 of the limit convex ring 412, and the limit convex ring 412 is in clearance fit with the limit outer edge 331. In this embodiment, the limit convex ring 412 is sleeved on the gear ring 33 and is in clearance fit with the gear ring 33, so that a flow channel can be formed between the limit convex ring 412 and the gear ring 33, and the oil overflowing from the oil storage groove 4113 can flow along the flow channel to the gap between the limit convex ring 412 and the gear ring 33. Specifically, the limit convex ring 412 is in clearance fit with the limit outer edge 331, and this setting can realize the limitation of the gear ring 33 by the limit convex ring 412.

[0048] In other embodiments, the side of the gear ring 33 close to the support cover 411 is in clearance fit with the limit convex ring 412. In this embodiment, during the process of the oil overflowing from the oil storage groove 4113 flowing to the gap between the limit convex ring 412 and the gear ring 33, if the flow channel is too long, part of the oil will remain on the flow channel, resulting in the loss of oil. The above setting enables the oil overflowing from the oil storage groove 4113 to directly flow to the gap between the limit convex ring 412 and the gear ring 33, which can improve the loss of oil.

[0049] Optionally, the first end of the oil passage hole 4112 faces the first cavity 11, and the second end of the oil passage hole 4112 faces the second cavity 12; along the direction of gravity, the distance from the second end of the oil passage hole 4112 to the ground is greater than the distance from the first end of the oil passage hole 4112 to the ground. In this embodiment, because there is a height difference between the first end and the second end of the oil passage hole 4112 in the vertical direction, this setting enables the oil reaching the second end of the oil passage hole 4112 to flow through the oil passage hole 4112 to the first end of the oil passage hole 4112 under the action of gravity.

[0050] Embodiment Two

[0051] As Figure 5 and Figure 6 shown, this embodiment is basically the same as the first embodiment, and the only difference lies in the different diversion structure 4111. Optionally, the diversion structure 4111 includes an oil passage hole 4112. One end of the oil passage hole 4112 faces the gear ring 33 in the first cavity 11, and the second end of the oil passage hole 4112 faces the second cavity 12. In this embodiment, the oil flowing into the first cavity 11 from the oil passage hole 4112 can directly drip onto the gear ring 33, so that the oil dripping onto the gear ring 33 can flow to the gap between the gear ring 33 and the limit convex ring 412.

[0052] Optionally, the side of the gear ring 33 close to the support cover 411 is in clearance fit with the limit convex ring 412. In this embodiment, compared with the limit convex ring 412 sleeved on the gear ring 33, this setting makes the radius dimension of the limit flange smaller, so that the relative speed between the gear ring 33 and the limit convex ring 412 can be reduced, and the friction between the gear ring 33 and the limit convex ring 412 can be reduced.

[0053] Optionally, the gear shift oil cylinder 41 further includes an inner ring 413 protruding from the support cover 411. The inner ring 413 is sleeved on the gear ring 33 and is in clearance fit with the gear ring 33. A limit outer edge 331 protrudes from the outer peripheral wall of the gear ring 33 on the side away from the support cover 411 along the inner ring 413. The inner ring 413 is in clearance fit with the limit outer edge 331. The area of the gear ring 33 located between the limit convex ring 412 and the inner ring 413 faces the first end of the oil passage hole 4112. In this embodiment, an inner ring 413 and an outer ring 414 coaxial with the gear ring 33 respectively protrude from the support cover 411. The inner ring 413, the outer ring 414 and the support cover 411 enclose a piston cavity 415. The inner ring 413 and the limit convex ring 412 limit the gear ring 33 at the same time, thereby improving the stability of the limit on the gear ring 33. At the same time, after the oil from the oil passage hole 4112 reaches the gear ring 33, it will flow to both sides of the gear ring 33 along the axial direction of the gear ring 33. Therefore, a part of it flows to the gap between the limit convex ring 412 and the gear ring 33, and the other part flows to the gap between the inner ring 413 and the gear ring 33.

[0054] Optionally, the gear shift oil cylinder 41 is an integrally formed part. In this embodiment, the gear shift oil cylinder 41 is cast, which can reduce the manufacturing cost of the gear shift oil cylinder 41 and improve the manufacturing precision of the gear shift oil cylinder 41 at the same time.

[0055] This embodiment also provides a vehicle, including the transmission in the above solution.

[0056] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Transmission gearbox, characterized in that, Comprising: A housing (1): An input shaft (21) and an output shaft (22), both the input shaft (21) and the output shaft (22) are rotatably arranged coaxially within the housing (1); A planetary gear set, the sun gear (31) of the planetary gear set is fixedly connected coaxially with the input shaft (21), and the planet carrier (32) of the planetary gear set is fixedly connected coaxially with the output shaft (22); A clutch capable of connecting or disconnecting the ring gear (33) of the planetary gear set with the housing (1), the clutch includes a gear position oil cylinder (41), the gear position oil cylinder (41) includes a support cover (411) and a limit convex ring (412) arranged on one side of the support cover (411), the support cover (411) is fixedly connected with the housing (1) to divide the housing (1) into a first cavity (11) and a second cavity (12), the planetary gear set is located in the first cavity (11), along the axial direction of the ring gear (33), the limit convex ring (412) is in clearance fit with the ring gear (33), the support cover (411) is provided with a flow guiding structure (4111), and a part of the oil fluid in the second cavity (12) located on the support cover (411) can flow to the clearance between the limit convex ring (412) and the ring gear (33) through the flow guiding structure (4111); An output gear (5), the output shaft (22) passes through the support cover (411) and is fixedly connected with the output gear (5) in the second cavity (12).

2. The gearbox according to claim 1, characterized in that, The flow guiding structure (4111) includes an oil passing hole (4112) and an oil storage groove (4113) arranged on the support cover (411), the oil passing hole (4112) can lead the oil fluid in the second cavity (12) into the first cavity (11), and an annular oil storage groove (4113) is recessed around the input shaft (21) on the support cover (411) between the limit convex ring (412) and the oil passing hole (4112).

3. The gearbox according to claim 2, characterized in that, The limit convex ring (412) is sleeved on the ring gear (33) and is in clearance fit with the ring gear (33), a limit outer edge (331) is convexly provided on the outer peripheral wall of the ring gear (33) on the side of the limit convex ring (412) away from the support cover (411), and the limit convex ring (412) is in clearance fit with the limit outer edge (331).

4. The gearbox according to claim 2, characterized in that One side of the ring gear (33) close to the support cover (411) is in clearance fit with the limit convex ring (412).

5. The gearbox according to claim 2, characterized in that, The first end of the oil passing hole (4112) faces the first cavity (11), and the second end of the oil passing hole (4112) faces the second cavity (12); Along the gravity direction, the distance from the second end of the oil passing hole (4112) to the ground is greater than the distance from the first end to the ground.

6. The transmission according to claim 1, characterized in that The flow guiding structure (4111) includes an oil passing hole (4112), the first end of the oil passing hole (4112) faces the ring gear (33) in the first cavity (11), and the second end of the oil passing hole (4112) faces the second cavity (12).

7. The gearbox according to claim 6, wherein One side of the gear ring (33) close to the support cover (411) is in clearance fit with the limit convex ring (412).

8. The transmission according to claim 7, wherein, The gear shift oil cylinder (41) further includes an inner ring (413) protruding from the support cover (411). The inner ring (413) is sleeved on the gear ring (33) and is in clearance fit with the gear ring (33). A limit outer edge (331) protrudes from the outer peripheral wall of the gear ring (33) on the side away from the support cover (411) along the inner ring (413). The inner ring (413) is in clearance fit with the limit outer edge (331). The area of the gear ring (33) located between the limit convex ring (412) and the inner ring (413) is opposite to the first end of the oil passing hole (4112).

9. The gearbox according to any one of claims 1-8, characterized in that, The gear shift oil cylinder (41) is an integrally formed part.

10. A vehicle, characterized in that, It includes the transmission according to any one of claims 1-9.

Images