Gearbox shell and transmission

Abstract

The gearbox shell comprises a front shell body, a middle shell body and a rear shell body which are connected, the front shell body comprises a ventilation shell body, a first installation shell body and a second installation shell body which are integrally connected, and a ventilation cavity is formed in the ventilation shell body; a ventilation hole communicated with the ventilation cavity is formed in the top of the ventilation shell, and a ventilation plug is detachably arranged on the ventilation hole; and an oil baffle plate is arranged in the ventilation shell below the ventilation hole. The ventilation cavity is formed in the gearbox shell, the problem of box burning caused by too high temperature of an auxiliary box can be effectively solved, the stability of a transmission in the working process is improved, and the height of the gearbox shell is effectively reduced through the arrangement of the shape and the structure of the shell. The transmission shell is simple in structure, ideal lubricating effect can be achieved, machining cost of the transmission shell is reduced, and the transmission shell has high popularization and use value.

Description

Technical Field

[0001] The utility model belongs to the field of transmissions, and in particular relates to a transmission housing and a transmission. Background Art

[0002] When a car's gearbox is working, temperature changes will occur inside the gearbox. The air inside the gearbox expands when it heats up and contracts when it cools down, which may cause excessive pressure difference between the gearbox and the outside world, thereby causing premature wear of the seals and some components of the car's gearbox, affecting the service life of the gearbox. The usual solution is to provide a ventilation structure on the gearbox casing to connect the inside of the gearbox casing with the outside world. The existing ventilation structure is often provided on the actuator or the upper cover shell. For transmissions without an upper cover structure, most of them require an exhaust cavity to be provided inside the shell. This setting method will increase the height of the gearbox assembly, affect the strength of the transmission shell, and make the transmission shell mold manufacturing more difficult and increase the processing cost, which urgently needs to be improved. Utility Model Content

[0003] The purpose of the utility model is to provide a transmission housing and a transmission to solve the technical problem in the prior art that the height of the transmission assembly increases and the strength decreases due to the exhaust cavity being arranged in the transmission housing.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A gearbox housing comprises a front housing, a middle housing and a rear housing which are connected to each other, the front housing comprising a ventilation housing, a first mounting housing and a second mounting housing which are integrally connected to each other, and a ventilation cavity is provided in the ventilation housing;

[0006] A vent hole communicating with the vent cavity is provided on the top of the vent shell, and a vent plug is detachably provided on the vent hole; an oil baffle is provided in the vent shell below the vent hole.

[0007] The utility model also has the following technical features:

[0008] Specifically, a transition cavity communicated with the ventilation cavity is provided in the middle shell, and the oil baffle extends into the transition cavity.

[0009] Furthermore, the ventilation shell includes a first connecting section, a first curved section and a second connecting section which are connected to each other. The first connecting section is connected to the first mounting shell, and the second connecting section is connected to the second mounting shell. The first curved section is an outwardly convex arch structure.

[0010] Furthermore, the oil baffle is arranged in the first curved surface segment, and the oil baffle connects the first side and the second side of the first curved surface segment which are arranged opposite to each other.

[0011] Furthermore, the oil baffle is a straight plate.

[0012] Furthermore, the first mounting shell includes a third connecting segment and a second curved segment that are connected to each other, the third connecting segment is connected to the second connecting segment, the second curved segment is connected to the second mounting shell, and the second curved segment is an outwardly convex semicircular structure.

[0013] The present invention also protects a transmission, including the above-mentioned transmission housing

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] This utility model places the vent cavity inside the transmission housing, effectively preventing burnout caused by overheating of the auxiliary transmission, improving the stability of the transmission during operation. Furthermore, the housing shape and structure effectively reduce the height of the transmission housing. This simple structure achieves ideal lubrication while reducing transmission housing processing costs, making it highly valuable for widespread use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 It is a cross-sectional view of the present invention.

[0019] 1-front shell, 2-middle shell, 3-rear shell, 4-vent plug, 5-oil baffle; 11-vent shell, 12-first mounting shell, 13-second mounting shell; 111-first connecting section, 112-first curved section, 113-second connecting section; 121-third connecting section, 122-second curved section. DETAILED DESCRIPTION

[0020] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0021] The terms "upper", "lower", "front", "rear", etc. used in the present invention to indicate directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. "Inside" and "outside" refer to the inside and outside of the contours of the corresponding components, and the above terms cannot be understood as limitations on the present invention.

[0022] Furthermore, the terms "first," "second," and other ordinal numbers are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referenced. Thus, a feature designated "first" or "second" may explicitly or implicitly include one or more of the features.

[0023] In this utility model, unless otherwise specified, terms such as "installed," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0024] Unless otherwise specified, the components in this utility model can be purchased from the market.

[0025] Example 1

[0026] Following the above technical solution, Figures 1 to 3 As shown, this embodiment provides a gearbox housing, including a front housing 1, a middle housing 2 and a rear housing 3 that are connected together. The front housing 1 and the middle housing 2 constitute a front box, and the middle housing 2 and the rear housing 3 constitute a rear box. The front housing 1 includes a ventilation housing 11, a first mounting housing 12 and a second mounting housing 13 that are integrally connected. A ventilation cavity is provided in the ventilation housing 11.

[0027] The gearbox in this example is a five-axis structure, in which the rear gearbox shaft system is a three-axis structure and the front gearbox is a Figure 3 The four-axis structure shown in the figure; in order to make better use of space, Figure 3 The upper left space in the front center box where the shaft system is not set is set as a ventilation cavity. This setting can make full use of the space in the transmission housing, and the ventilation structure is away from the gears facing inward, which can effectively reduce the risk of oil leakage.

[0028] A vent hole is provided on the top of the vent housing 11, which is connected to the vent cavity. A vent plug 4 is detachably provided on the vent hole. An oil baffle 5 is provided in the vent housing 11 below the vent hole. The oil baffle 5 can also serve as a rib to enhance the strength of the local housing.

[0029] As a preferred solution of this embodiment, a transition cavity connected to the ventilation cavity is provided in the middle shell 2, and the oil baffle plate 5 extends into the transition cavity. The oil baffle plate 5 is connected to the front shell 1 and the middle shell 2 to form a semi-closed cavity, which makes the oil blocking effect more ideal.

[0030] As a preferred embodiment of this embodiment, the vent housing 11 includes a first connecting section 111, a first curved section 112, and a second connecting section 113. The first connecting section 111 is connected to the first mounting housing 12, and the second connecting section 113 is connected to the second mounting housing 13. The first curved section 112 has an outwardly convex arched structure. The configuration of the first curved section 112 as a convex arched structure allows the vent plug 4 to be positioned higher. If the oil temperature inside the transmission housing is too high, and the oil flows upward in the form of oil vapor, the higher the position of the vent plug 4, the better the cooling effect on the high-temperature oil vapor. Ultimately, the lubricating oil can be quickly condensed and liquefied and then refluxed, effectively reducing oil spillage.

[0031] As a preferred solution of this embodiment, the oil baffle 5 is arranged in the first curved surface section 112 , and the oil baffle 5 connects the first side edge and the second side edge of the first curved surface section 112 which are arranged opposite to each other.

[0032] As a preferred solution of this embodiment, the oil baffle 5 is a straight plate. In other solutions, the position and setting angle of the oil baffle 5 can be adjusted according to actual needs. For example, the oil baffle 5 can be tilted downward so that the oil on the oil baffle can flow back into the gearbox under the action of the tilt angle.

[0033] As a preferred embodiment of this embodiment, the first mounting housing 12 includes a third connecting segment 121 and a second curved segment 122, which are connected to each other. The third connecting segment 121 is connected to the second connecting segment 113, and the second curved segment 122 is connected to the second mounting housing 13. The second curved segment 122 has an outwardly convex semicircular structure. The structural arrangement of the first mounting housing 12 further utilizes the layout of the shaft system and can effectively save space.

[0034] When the utility model is in use:

[0035] During operation, the high-temperature gas in the transmission housing enters the ventilation cavity provided in the ventilation housing 11. The high-temperature gas includes high-temperature oil and gas and high-temperature air. The inlet cross-section of the ventilation cavity is composed of the outer edge of the oil baffle 5 and the inner wall of the middle housing 12. After the high-pressure and high-temperature gas enters the ventilation cavity through this cross-section, the pressure is released due to the increase in the volume of the gas, thereby slowing down the overflow impact of the high-pressure and high-temperature gas. At the same time, since the ventilation cavity is set at the uppermost end of the transmission housing, the temperature in the ventilation cavity is low and connected to the atmosphere. The high-temperature oil and gas are further condensed and refluxed in contact with the atmosphere inside the vent plug 4, so that only the high-temperature air is discharged outward through the vent plug 4, avoiding oil and gas overflow.

[0036] The utility model can effectively prevent the burning problem caused by excessive temperature in the transmission box through structural design, improves the stability of the transmission during operation, and prevents oil from being discharged through the vent hole through the oil baffle.

[0037] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0038] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

Claims

1. A gearbox housing, comprising a front housing (1), a middle housing (2) and a rear housing (3) connected together, characterized in that: The front housing (1) comprises a ventilation housing (11), a first mounting housing (12), and a second mounting housing (13) which are integrally connected, and a ventilation cavity is provided in the ventilation housing (11); A vent hole communicating with the vent cavity is provided on the top of the vent shell (11), and a vent plug (4) is detachably provided on the vent hole; an oil baffle (5) is provided in the vent shell (11) below the vent hole.

2. The gearbox housing according to claim 1, wherein: A transition cavity communicating with the ventilation cavity is provided in the middle shell (2), and the oil baffle (5) extends into the transition cavity.

3. The gearbox housing according to claim 1, wherein: The ventilation housing (11) comprises a first connecting section (111), a first curved section (112), and a second connecting section (113) which are connected to each other; the first connecting section (111) is connected to the first mounting housing (12); the second connecting section (113) is connected to the second mounting housing (13); and the first curved section (112) is an outwardly convex arch structure.

4. The gearbox housing according to claim 3, wherein: The oil baffle (5) is arranged in the first curved surface section (112), and the oil baffle (5) connects a first side edge and a second side edge of the first curved surface section (112) that are arranged opposite to each other.

5. The gearbox housing according to claim 1, wherein: The oil baffle plate (5) is a straight plate.

6. The gearbox housing according to claim 3, wherein: The first mounting shell (12) comprises a third connecting section (121) and a second curved section (122) which are connected to each other, the third connecting section (121) being connected to the second connecting section (113), the second curved section (122) being connected to the second mounting shell (13), and the second curved section (122) being an outwardly convex semicircular structure.

7. A transmission, characterized in that: The invention comprises a transmission housing according to any one of claims 1 to 6.

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