Multi-output transfer case

Abstract

The invention discloses a multi-output transfer case, and belongs to the technical field of engineering machinery, the multi-output transfer case comprises a shell and a ventilation cavity, the ventilation cavity of a labyrinth structure is arranged, the ventilation cavity is provided with cavity channels which bend and change directions for multiple times in the gas flow direction, when gas in the transfer case is exhausted outwards, the gas passes through the multiple cavity channels in sequence, and the gas in the transfer case is exhausted outwards. Therefore, a plurality of barriers can be formed for the lubricating oil in the gas, the lubricating oil in the ventilation cavity can rapidly flow back, accumulation of the lubricating oil in the ventilation cavity is reduced, and meanwhile oil leakage is effectively reduced.

Description

Technical Field

[0001] The invention relates to a multi-output transfer case, belonging to the technical field of engineering machinery. Background Art

[0002] As a high-end product of engineering machinery, cranes have the advantages of high-speed driving and high off-road performance, and are widely used in wind power, oil fields, petrochemicals and other fields. The upper vehicle power take-off transfer case is a key core component of the chassis transmission system of the all-terrain crane. It is arranged on the upper vehicle of the vehicle. The input shaft of the transfer case is connected to the high-speed motor. The left and right output ends of the transfer case are connected to the hydraulic pump and the steering pump to provide them with a transmission power source, thereby meeting different working conditions.

[0003] At present, the vent plug of the transfer case is prone to oil leakage under driving conditions. At the same time, the temperature of the entire transfer case shell is too high, which seriously affects its service life and is not conducive to the working stability and reliability of the entire transfer case. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a multi-output transfer case that can effectively improve the oil blocking effect and reduce oil leakage.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions: The present invention provides a multi-output transfer case, comprising: The housing has a plurality of oil collecting chambers and ventilation chambers disposed on its lower side, wherein a ventilation chamber is disposed near the front side of one of the oil collecting chambers, and the ventilation chamber has a cavity channel with multiple bends and changes of direction along the gas flow direction; The front end of the ventilation cavity is connected to the oil collecting cavity; the shell is provided with a ventilation plug connected to the end of the ventilation cavity.

[0006] Furthermore, the ventilation cavity is provided with a symmetrical first baffle, a second baffle, and a third baffle extending from a side wall of the first baffle to the second baffle; The first baffle plate and the second baffle plate together with a part of the front wall of the shell form the ventilation cavity; the third baffle plate divides the ventilation cavity into a first cavity channel, a second cavity channel, and a third cavity channel which are connected in sequence; The first cavity channel and the third cavity channel are located at the front and rear sides of the third baffle, and the second cavity channel is located at the end side of the third baffle; The front end of the first cavity channel is connected to the oil collecting chamber; the end of the third cavity channel is connected to the air plug.

[0007] Furthermore, the width of the first cavity channel gradually decreases from the front end to the rear end; and the width of the third cavity channel gradually increases from the front end to the rear end.

[0008] Further, the third baffle has a first arc-shaped wall on one side close to the first cavity channel, and the second baffle has a first inclined wall opposite to the first arc-shaped wall; The third baffle has a second inclined wall on one side close to the third cavity channel; The second baffle has a second arc-shaped wall connected to the first inclined wall at an obtuse transition angle and facing the second cavity channel; The first baffle has a notch forming a front end opening of the ventilation cavity.

[0009] Furthermore, it also includes an input shaft assembly and two output shaft assemblies located on both sides of the input shaft assembly; The housing is provided with a first oil collecting chamber corresponding to the input shaft assembly, a second oil collecting chamber corresponding to the two output shaft assemblies, and a third oil collecting chamber; the ventilation chamber is located near the front side of the first oil collecting chamber.

[0010] Furthermore, an oil guiding groove having an arc-shaped structure and two ends extending to the first oil collecting chamber and the third oil collecting chamber respectively is provided at the edge of the lower wall of the third oil collecting chamber.

[0011] Furthermore, the lower wall of the second oil collecting chamber is provided with a first groove extending outward from the center and with a gradually increasing diameter.

[0012] Furthermore, a second groove extending outward from the center and with a diameter gradually increasing from the inside to the outside is provided on the lower wall of the third oil collecting chamber, and the oil guide groove is connected to the second groove.

[0013] Furthermore, two fourth baffles facing the second oil collecting chamber and the second oil collecting chamber are respectively provided at the rear side of the first oil collecting chamber; The fourth baffle is provided with an oil-passing through hole.

[0014] Furthermore, the fourth baffle is an arc-shaped structure; The concave surfaces of the two fourth baffles face the centers of the second oil collecting chamber and the third oil collecting chamber respectively.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a multi-output transfer case, which is provided with a labyrinth-shaped ventilation cavity, and the ventilation cavity is formed with a plurality of cavity channels that are bent and connected in sequence along the gas flow direction. When the gas in the transfer case is discharged outward, it passes through the plurality of cavity channels in sequence, thereby forming multiple barriers for the lubricating oil in the gas, allowing the lubricating oil in the ventilation cavity to quickly flow back, reducing the accumulation of the lubricating oil in the ventilation cavity, and effectively reducing oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a transfer case provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the internal structure of a housing of a transfer case provided by an embodiment of the present invention; Figure 3 is a lubricating oil flow route diagram in a transfer case provided by an embodiment of the present invention; Figure 4 is a schematic structural diagram of a housing of a transfer case provided by an embodiment of the present invention; Figure numerals: 1. Shell; 11. First oil collecting chamber; 12. Second oil collecting chamber; 13. Third oil collecting chamber; 14. First groove; 15. Second groove; 16. Third groove; 17. Fourth groove; 2. Ventilation chamber; 21. First baffle; 22. Second baffle; 23. Third baffle; 3. Fourth baffle; 4. Ventilation plug; 5. Input shaft assembly; 6. First output shaft assembly; 7. Second output shaft assembly. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment introduces a multi-output transfer case, including: a housing 1, a ventilation chamber 2, an input shaft assembly 5, a first output shaft assembly 6, and a second output shaft assembly 7.

[0021] Among them, the input shaft assembly 5 is located in the middle of the housing 1, the first output shaft assembly 6 and the second output shaft assembly 7 are respectively located on the left and right sides of the input shaft assembly 5, and the input shaft assembly 5 and the first output shaft assembly 6 and the second output shaft assembly 7 are connected by gear transmission. The upper and lower sides of the housing 1 are respectively provided with a first oil collecting chamber 11, a second oil collecting chamber 12 and a third oil collecting chamber 13 corresponding to the input shaft assembly 5, the first output shaft assembly 6 and the second output shaft assembly 7. The input shaft assembly 5 includes an input shaft, an input shaft gear sleeved on the input shaft and input shaft bearings fixed at both ends of the input shaft. The first output shaft assembly 6 and the second output shaft assembly 7 both include an output shaft, an output shaft gear sleeved on the output shaft and output shaft bearings fixed at both ends of the output shaft. The bearings at the ends of the input shaft and the two output shafts are respectively arranged in the corresponding first oil collecting chamber 11, the second oil collecting chamber 12 and the third oil collecting chamber 13.

[0022] Specifically, the input end of the input shaft assembly 5 is connected to a unidirectional motor, which drives the input shaft to rotate counterclockwise. During the continuous operation of the transfer case, as the temperature inside the case increases, the lubricating oil in the case expands in volume, causing the air in the case to be compressed. The internal cavity is prone to high air pressure, which can easily cause the skeleton oil seal and the O-ring to fail to seal. Therefore, a breathable plug 4 is provided above the housing 1 to maintain the air pressure balance between the inner and outer cavities and ensure the pressure inside the entire cavity. However, due to the lack of shielding for the lubricating oil, the breathable plug 4 is prone to oil leakage when the gas is discharged under driving conditions.

[0023] As an improvement on the prior art, based on the above content, this embodiment sets a ventilation cavity 2 near the front side of the first oil collecting cavity 11, and the ventilation cavity 2 has a cavity channel that bends and changes direction multiple times along the gas flow direction; the front end of the ventilation cavity 2 is connected to the second oil collecting cavity 12; the end of the ventilation cavity 2 is connected to the air plug 4. Multiple barriers can be formed for the lubricating oil in the gas, so that the lubricating oil in the ventilation cavity 2 can quickly flow back, reduce the accumulation of lubricating oil in the ventilation cavity 2, and effectively reduce oil leakage.

[0024] As a preferred embodiment, the structure of the ventilation cavity 2 is as follows: a symmetrical first baffle 21, a second baffle 22 and a third baffle 23 extending from a side wall of the first baffle 21 to the second baffle 22 are provided in the ventilation cavity 2. The first baffle 21 and the second baffle 22 and part of the front wall of the shell 1 enclose the ventilation cavity 2; the third baffle 23 separates the ventilation cavity 2 into a first cavity channel, a second cavity channel and a third cavity channel. The first cavity channel and the third cavity channel are located on the front and rear sides of the third baffle 23, and the second cavity channel is located on the end side of the third baffle 23; the first cavity channel is connected to the third cavity channel through the second cavity channel. The front end of the first cavity channel is connected to the second oil collecting cavity 12; the end of the third cavity channel is connected to the air plug 4.

[0025] Furthermore, in order to make the lubricating oil flow back more quickly, in the present embodiment, the width of the first cavity channel gradually decreases from the front end to the rear end; and the width of the third cavity channel gradually increases from the front end to the rear end.

[0026] In addition, if Figure 3 As shown, the third baffle 23 has a first curved wall on one side close to the first cavity channel, and the second baffle 22 has a first inclined wall opposite to the first curved wall. The third baffle 23 has a second inclined wall on one side close to the third cavity channel; the second baffle 22 has a second curved wall connected to the first inclined wall at an obtuse angle and facing the second cavity channel; the first baffle 21 has a notch forming the front end opening of the ventilation cavity 2. The first curved wall is an S-shaped structure, and the convex surface of the second curved wall faces the second cavity channel.

[0027] Based on the above content, when the lubricating oil overflows, it first passes through the first cavity channel, and can be shielded by the first arc-shaped wall of the third baffle 23, then enters the second cavity channel along the first oblique wall of the second baffle 22 and the first arc-shaped wall of the third baffle 23, and is shielded by the second arc-shaped wall of the second baffle 22 and the front wall of the shell 1, and finally enters the third cavity channel, and can continue to be shielded by the second oblique wall of the third baffle 23 and the front wall of the shell 1. The refluxed lubricating oil can flow along the second oblique wall on the front side of the third baffle 23 to the second arc-shaped wall of the second baffle 22, and then flow along the second arc-shaped wall to the first oblique wall of the second baffle 22, and finally flow back to the second oil collecting chamber 12 through the front end opening of the ventilation chamber 2. In this embodiment, the lubricating oil in the ventilation chamber 2 can slide down in time and quickly, which can reduce the storage time of the lubricating oil. Among them, the arc-shaped wall can provide a larger contact area, increase the heat conduction area, thereby providing a more effective buffer for the lubricating oil, reducing the flow rate, and also improving the heat dissipation efficiency.

[0028] Furthermore, if Figure 3As shown, the first baffle 21 has a third arcuate wall on one side facing the second oil collecting chamber 12, and the second baffle 22 has a fourth arcuate wall on one side facing the third oil collecting chamber 13. Both the third arcuate wall and the fourth arcuate wall can provide guidance for the lubricating oil.

[0029] It should be supplemented that an oil guide groove with an arc-shaped extension structure and connected to the first oil collecting chamber 11 is provided at the edge of the lower wall of the third oil collecting chamber 13. A second groove 15 extending from the center to the outside and gradually increasing in diameter from the inside to the outside is provided on the lower wall of the third oil collecting chamber 13, and the oil guide groove is connected to the second groove 15. A first groove 14 extending from the center to the outside and gradually increasing in diameter from the inside to the outside is provided on the lower wall of the second oil collecting chamber 12.

[0030] Therefore, if Figure 3 As shown in the figure, when the input shaft assembly 5 rotates, the lubricating oil at the bottom of the housing 1 is driven by the input shaft assembly 5, and because the input shaft gear is left-handed, a large amount of lubricating oil enters the third oil collecting chamber 13 on the right side, and the lubricating oil flows along Figure 3 The oil is introduced into the oil guide groove and the second groove 15 in an orderly manner in the direction of the right arrow in the middle, lubricating the bearing on the right side. While lubricating, most of the lubricating oil flows into the right side, avoiding the oil churning loss caused by the excessive speed of the input end. Similarly, driven by the input shaft assembly 5, the lubricating oil of the first output peripheral assembly 6 on the left side flows into the second oil guide groove 12 on the left side along the first baffle 21 under the drive of the left input shaft gear to supplement the lubrication of the bearing. Figure 3 As indicated by the arrow on the left.

[0031] In addition, it is necessary to explain that in order to ensure the effect and continuity of lubrication, in this embodiment, the lower walls of the first oil collecting chamber 11, the second oil collecting chamber 12 and the third oil collecting chamber 13 are provided with a plurality of semicircular fourth grooves 17 and a square third groove 16, and the lubricating oil can be partially stored in these grooves, so that the lubricating oil can be continuously replenished and lubrication can be continued. Example

[0032] This embodiment provides a multi-output transfer case, which is different from the embodiment 1 in that, in this embodiment, two fourth baffles 3 corresponding to the second oil collecting chamber 12 and the third oil collecting chamber 13 are respectively provided at the rear side of the first oil collecting chamber 11; the fourth baffle 3 is provided with an oil through hole. The fourth baffle 3 can reduce the activity space of the lubricating oil in the second oil collecting chamber 12 and the third oil collecting chamber 13, thereby reducing the resistance of the first output shaft assembly 6 and the second output shaft assembly 7, thereby achieving the purpose of reducing the oil stirring loss.

[0033] Furthermore, in the present embodiment, the fourth baffle plate 3 is an arc-shaped structure; the concave surfaces of the two fourth baffle plates 3 respectively face the centers of the corresponding second oil collecting chamber 12 and the third oil collecting chamber 13, and the fourth baffle plate 3 can provide guidance for the lubricating oil, so that the lubricating oil can flow along the concave surfaces of the fourth baffle plate 3 to achieve continuous lubrication.

[0034] Because the transfer case has a narrow axial width and limited space, the heat generation of the transfer case assembly can be effectively reduced by cleverly utilizing the space structure through a baffle that is effectively combined with the transfer case housing, thereby avoiding the occurrence of excessive transfer case temperature.

[0035] It should be added that, in the present embodiment, an oil through hole is designed on each of the two fourth baffles 3 to facilitate timely discharge of excess lubricating oil in the second oil collecting chamber 12 and the third oil collecting chamber 13 .

[0036] In summary, the present invention provides a multi-output transfer case, which is provided with a labyrinth-shaped ventilation cavity 2, and the ventilation cavity 2 is formed with a plurality of cavity channels that are bent and connected in sequence along the gas flow direction. When the gas in the transfer case is discharged outward, it passes through the plurality of cavity channels in sequence, thereby forming multiple barriers to the lubricating oil in the gas, allowing the lubricating oil in the ventilation cavity 2 to quickly flow back, reducing the accumulation of the lubricating oil in the ventilation cavity 2, and effectively reducing oil leakage.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure rather than to limit its protection scope. Although the present disclosure has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the present disclosure, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the disclosed claims to be approved.

Claims

1. A multi-output transfer case, characterized in that: include: The shell is provided with an oil collecting chamber and a ventilation chamber, wherein the ventilation chamber has a cavity passage that bends and changes direction multiple times along the gas flow direction; The front end of the ventilation cavity is connected to the oil collecting cavity; the shell is provided with a ventilation plug connected to the end of the ventilation cavity.

2. The multi-output transfer case according to claim 1, characterized in that: The ventilation cavity is provided with a symmetrical first baffle, a second baffle, and a third baffle extending from a side wall of the first baffle to the second baffle; The first baffle plate and the second baffle plate together with a part of the front wall of the shell form the ventilation cavity; the third baffle plate divides the ventilation cavity into a first cavity channel, a second cavity channel, and a third cavity channel which are connected in sequence; The first cavity channel and the third cavity channel are located at the front and rear sides of the third baffle, and the second cavity channel is located at the end side of the third baffle; The front end of the first cavity channel is connected to the oil collecting cavity; The end of the third cavity channel is connected to the vent plug.

3. The multi-output transfer case according to claim 2, characterized in that: The width of the first cavity channel gradually decreases from the front end to the rear end; the width of the third cavity channel gradually increases from the front end to the rear end.

4. The multi-output transfer case according to claim 2, characterized in that: The third baffle has a first arc-shaped wall on one side close to the first cavity channel, and the second baffle has a first inclined wall opposite to the first arc-shaped wall; The third baffle has a second inclined wall on one side close to the third cavity channel; The second baffle has a second arc-shaped wall connected to the first inclined wall at an obtuse angle and facing the second cavity channel. The first baffle has a notch forming a front end opening of the ventilation cavity.

5. The multi-output transfer case according to claim 1, characterized in that: Also includes an input shaft assembly and two output shaft assemblies located on both sides of the input shaft assembly; The housing is provided with a first oil collecting chamber corresponding to the input shaft assembly, a second oil collecting chamber corresponding to the two output shaft assemblies, and a third oil collecting chamber; the ventilation chamber is located near the front side of the first oil collecting chamber.

6. The multi-output transfer case according to claim 5, characterized in that: An oil guide groove with an arc-shaped structure is arranged at the edge of the lower wall of the third oil collecting chamber, and the two ends of the oil guide groove extend to the first oil collecting chamber and the third oil collecting chamber respectively.

7. The multi-output transfer case according to claim 5, characterized in that: The lower wall of the second oil collecting chamber is provided with a first groove extending outward from the center and gradually increasing in diameter from the center.

8. The multi-output transfer case according to claim 6, characterized in that: A second groove extending outward from the center and gradually increasing in diameter from the inside to the outside is provided on the lower wall of the third oil collecting chamber, and the oil guide groove is connected to the second groove.

9. The multi-output transfer case according to claim 5, characterized in that: Two fourth baffles are provided at the rear side of the first oil collecting chamber, facing the second oil collecting chamber and the third oil collecting chamber respectively; The fourth baffle is provided with an oil-passing through hole.

10. The multi-output transfer case according to claim 9, characterized in that: The fourth baffle is an arc-shaped structure; The concave surfaces of the two fourth baffles face the centers of the second oil collecting chamber and the third oil collecting chamber respectively.

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