Transfer case rear cover shell and transfer case

Abstract

The utility model provides a transfer case rear cover shell and a transfer case. An output cavity and an inner cavity are formed in the shell body, the output cavity is communicated with the inner cavity, the first oil guide groove is formed in the inner wall of the output cavity in the length direction of the output cavity, and the vent hole is formed in the upper portion of the inner wall of the inner cavity. The technical scheme of the utility model at least has the beneficial effects that the air inside and outside the shell body are communicated through the vent holes, so that the effects of ventilating and balancing the air pressure inside and outside the transfer case are achieved, and the device is simple in structure, does not affect the traditional structure of the transfer case, and is convenient to use. And when the pressure of the inner cavity during working of the shell is ensured to be within a normal range, gear oil can be ensured to normally flow in the cavity, and a transmission system is effectively lubricated.

Description

Technical Field

[0001] This application relates to the field of transfer case technology, specifically to a transfer case rear cover housing and a transfer case. Background Technology

[0002] An electronically controlled transfer case (ECU) is a power distribution system used in four-wheel drive vehicles. It monitors the vehicle's status in real time through an electronic control unit (ECU) and automatically adjusts the power distribution between the front and rear axles or the left and right wheels. It features multiple driving modes, such as two-wheel drive, four-wheel drive, and low-speed four-wheel drive, and can dynamically optimize power output based on road conditions, improving vehicle handling, stability, and off-road performance. The ECU integrates various sensors, relying on data such as wheel speed, steering angle, and throttle input to make precise decisions. It is suitable for various scenarios, including urban driving, off-road conditions, and snowy or slippery surfaces, combining intelligence, fuel economy, and adaptability, making it one of the key technologies in modern four-wheel drive vehicles.

[0003] When the electronically controlled transfer case is working, the gear shaft inside the transfer case rotates at a high speed, and the gear oil is agitated as the gear shaft rotates. Through splashing and oil passages, the oil lubricates and cools the transmission system. The internal temperature of the electronically controlled transfer case will rise with the operation temperature of the transfer case, which will lead to an increase in the air pressure inside the housing. In order to ensure that the internal pressure of the housing is within the normal range during operation and to ensure that the gear oil flows normally in the cavity, an oil guiding structure with a venting function is required. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a transfer case rear cover housing and a transfer case to solve the problem that the internal air pressure of the existing electronically controlled transfer case will increase as the operating temperature of the transfer case rises.

[0005] To achieve the above and other related objectives, this utility model provides a transfer case rear cover housing, comprising:

[0006] The housing body has an output cavity and an inner cavity inside, and the output cavity and the inner cavity are in communication.

[0007] A first oil guide groove is disposed on the inner wall of the output cavity along the length direction of the output cavity;

[0008] A vent is provided on the upper part of the inner wall of the inner cavity, and the vent penetrates the housing body.

[0009] Optionally, a second oil guide groove is also provided on the inner wall of the output cavity along its length direction, and the second oil guide groove is located at the upper part of the output cavity.

[0010] Optionally, the inner wall of the inner cavity is further provided with an oil baffle, which is disposed adjacent to the vent hole and is located between the second oil guide groove and the vent hole.

[0011] Optionally, an oil baffle ring is also provided on the inner wall of the cavity, and the oil baffle ring is arranged around the vent hole.

[0012] Optionally, the inner wall of the inner cavity is further provided with a flow guide groove, the vent hole is provided along the top of the flow guide groove towards the outside of the housing body, and the end of the flow guide groove away from the vent hole is provided with a flow guide surface.

[0013] Optionally, a vent plug is provided on one side of the vent located outside the housing body, and the vent plug has an open state and a closed state.

[0014] Optionally, the inner wall of the output cavity extends into the interior of the inner cavity, and a reinforcing rib is provided between the inner wall of the output cavity and the inner wall of the inner cavity.

[0015] Optionally, the housing body is further provided with a spare hole, which is arranged adjacent to the vent hole.

[0016] Optionally, the oil baffle is provided with a second guide surface on the side facing the second oil guide groove, and the second guide surface is biased towards the second oil guide groove in a downward direction.

[0017] This application also provides a transfer case, including the aforementioned transfer case rear cover housing.

[0018] As described above, the beneficial effects of the technical solution in this utility model include at least the following: by setting a vent hole to connect the air inside and outside the housing body, the effect of ventilation and balancing the air pressure inside and outside the transfer case is achieved. Furthermore, the device has a simple structure, does not affect the traditional structure of the transfer case, and ensures that the internal cavity pressure of the housing is within the normal range during operation, while ensuring that the gear oil flows normally in the cavity and effectively lubricates the transmission system. Attached Figure Description

[0019] Figure 1 The diagram shown is a structural schematic diagram from a first perspective of a first embodiment of an exemplary embodiment of the present invention.

[0020] Figure 2 The diagram shown is a structural schematic diagram from a second perspective of a first embodiment of an exemplary embodiment of the present invention.

[0021] Figure 3 Shown is a cross-sectional view of a first embodiment of an exemplary embodiment of the present invention;

[0022] Figure 4The diagram shown is a structural schematic of a second embodiment of an exemplary embodiment of the present invention.

[0023] Part Number Explanation

[0024] 1. Housing body; 2. First oil guide groove; 3. Vent hole; 4. Output chamber; 5. Inner cavity; 6. Second oil guide groove; 7. Oil baffle; 8. Flow guide groove; 9. Oil baffle ring; 10. Vent plug. Detailed Implementation

[0025] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0027] Numerous details are explored in the following description to provide a more thorough explanation of embodiments of the present disclosure. However, it will be apparent to those skilled in the art that embodiments of the present disclosure may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present disclosure.

[0028] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a transfer case rear cover housing, including a housing body 1, a first oil guide groove 2, and a vent hole 3. The housing body 1 is provided with an output cavity 4 and an inner cavity 5, which are connected. The output cavity 4 is mainly provided with an output shaft and a bearing, and one end of the output shaft extends into the inner cavity 5. An opening is provided on the side of the output cavity 4 away from the inner cavity 5. The first oil guide groove 2 is provided on the inner wall of the output cavity 4 along the direction from the output cavity 4 to the inner cavity 5. The first oil guide groove 2 is located at the bottom of the output cavity 4 and is used to guide oil flow to the inner wall of the output cavity 4. A vent hole 3 is provided on the upper part of the inner wall of the inner cavity 5 and penetrates the housing body 1 to connect the inside and outside of the housing body 1, thereby achieving the effect of ventilation and balancing the air pressure inside and outside the transfer case.

[0029] In one embodiment of this application, specifically, a second oil guide groove 6 is provided along the length direction of the inner wall of the output cavity 4. The second oil guide groove 6 is located at the upper part of the output cavity 4. The second oil guide groove 6 and the first oil guide groove 2 are located at the top and bottom of the inner wall of the output cavity 4, respectively, and are arranged opposite to each other to guide the oil in the cavity.

[0030] In one embodiment of this application, specifically, the inner wall of the inner cavity 5 is further provided with an oil-blocking member 7. The oil-blocking member 7 is a plate-shaped structure and is vertically arranged. The oil-blocking member 7 is arranged adjacent to the vent hole 3, and the oil-blocking member 7 is located between the second oil guide groove 6 and the vent hole 3. In the direction of gear rotation, the oil-blocking member 7 is located in front of the vent hole 3, thereby achieving the blocking effect. In this embodiment, in the direction of gear rotation, the second oil guide groove 6 is located in front of the vent hole 3. The oil-blocking member 7, located between the second oil guide groove 6 and the vent hole 3, can block the oil droplets while also guiding the splashed oil droplets into the second oil guide groove 6.

[0031] Please see Figure 4 In one embodiment of this application, specifically, an oil baffle ring 9 is also provided on the inner wall of the inner cavity 5. The oil baffle ring 9 has an annular structure and is arranged around the vent hole 3 to provide multi-directional protection for the vent hole 3 and prevent oil from entering the vent hole 3.

[0032] In one embodiment of this application, specifically, the inner wall of the inner cavity 5 is further provided with a guide groove 8, the guide groove 8 is located at the top of the vent groove, the vent hole 3 is provided along the top of the guide groove 8 towards the outside of the housing body 1, the vent hole 3 is located at the top of the guide groove 8, and the end of the guide groove 8 away from the vent hole 3 is provided with a guide surface. The guide groove 8 can guide the oil splashed around the vent hole 3 and the oil droplets condensed by oil mist, so as to avoid the splashed oil from accumulating at the vent hole 3, which would cause poor gas flow or gear oil to overflow from the vent plug.

[0033] In one embodiment of this application, specifically, a vent plug 10 is provided on the side of the vent 3 located outside the housing body 1. The vent plug 10 is a normally closed vent plug. In this embodiment, the vent plug 10 includes a mounting cylinder, a limiting spring, and a blocking plug. The mounting cylinder is located inside the outer end of the vent 3 (outside the housing). One end of the limiting spring is fixedly installed at the bottom of the mounting cylinder, and the other end of the limiting spring is connected to the blocking plug. The blocking plug is installed inside the mounting cylinder. When the air pressure inside the housing body 1 is too high, the gas will break through the blocking plug, allowing the gas inside and outside the housing body 1 to communicate and balance the air pressure. At the same time, the normally closed state can also prevent external dust from entering the housing body 1.

[0034] In one embodiment of this application, specifically, the inner wall of the output cavity 4 extends into the interior of the inner cavity 5, and a reinforcing rib is provided between the inner wall of the output cavity 4 and the inner wall of the inner cavity 5.

[0035] In one embodiment of this application, specifically, the housing body 1 is also provided with a spare hole, which is arranged adjacent to the vent hole 3. The spare hole is normally closed. When the vent hole 3 is blocked, the spare hole can ensure the gas communication between the inside and outside of the housing body 1 and balance the gas pressure.

[0036] In one embodiment of this application, specifically, the oil baffle 7 is provided with a second guide surface on the side facing the second oil guide groove 6. The second guide surface is biased towards the second oil guide groove 6 in a top-to-bottom direction. The second guide surface can prevent oil from sticking to the oil baffle 7.

[0037] Please see Figure 4 In one embodiment of this application, specifically, the outer ring of the oil baffle ring 9 is provided with a third guide surface, the third guide surface is located at the top of the outer ring of the oil baffle ring 9, and the third guide surface is gradually inclined outward along the direction from the top to the bottom of the oil baffle ring 9.

[0038] This application also provides a transfer case, including the aforementioned transfer case rear cover housing.

[0039] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A transfer case rear cover housing characterized by, include; The housing body has an output cavity and an inner cavity inside, and the output cavity and the inner cavity are in communication. A first oil guide groove is disposed on the inner wall of the output cavity along the length direction of the output cavity; A vent is provided on the upper part of the inner wall of the inner cavity, and the vent penetrates the housing body.

2. The transfer case rear cover housing according to claim 1, characterized in that: The inner wall of the output cavity is also provided with a second oil guide groove along its length direction, and the second oil guide groove is located at the upper part of the output cavity.

3. The transfer case rear cover housing according to claim 2, characterized in that: The inner wall of the cavity is also provided with an oil baffle, which is disposed adjacent to the vent hole and is located between the second oil guide groove and the vent hole.

4. A transfer case rear cover housing according to any one of claims 1-3, characterized in that: The inner wall of the cavity is also provided with an oil baffle ring, which surrounds the vent hole.

5. A transfer case rear cover housing according to any one of claims 1-3, characterized in that: The inner wall of the cavity is also provided with a flow guide groove, and the vent hole is provided along the top of the flow guide groove toward the outside of the housing body. The end of the flow guide groove away from the vent hole is provided with a flow guide surface.

6. A transfer case rear cover housing according to any one of claims 1-3, characterized in that: The vent is located on one side of the outer side of the housing body and is provided with a vent plug. The vent plug has an open state and a closed state.

7. A transfer case rear cover housing according to any one of claims 1-3, characterized in that: The inner wall of the output cavity extends into the interior of the inner cavity, and a reinforcing rib is provided between the inner wall of the output cavity and the inner wall of the inner cavity.

8. A transfer case rear cover housing according to any one of claims 1-3, characterized in that: The housing body is also provided with a spare hole, which is arranged adjacent to the vent hole.

9. A transfer case rear cover housing according to claim 3, characterized in that: The oil baffle is provided with a second guide surface on the side facing the second oil guide groove, and the second guide surface is biased towards the second oil guide groove in a downward direction.

10. A transfer, characterized by Includes the transfer case rear cover housing as described in any one of claims 1-9.

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