A bidirectional forced lubrication system for transfer case

Abstract

The present invention discloses a bidirectional forced lubrication system for a transfer case, comprising an oil tank, an oil suction passage, an oil pump and a lubricating oil passage; the oil tank is connected to the oil pump through the oil suction passage, one end of the oil suction passage is connected to the oil tank, and the other end has two oil passages, and both of the two oil passages are provided with a one-way valve; the oil pump is a bidirectional gear pump, and the inlet and outlet are respectively connected to the two oil passages; one end of the lubricating oil passage is provided with two oil inlet passages, and the other end is provided with multiple oil outlet passages, and both of the two oil inlet passages are provided with a one-way valve 2, and are respectively connected to the two oil passages, and the multiple oil outlet passages are respectively connected to the various components of the input shaft and the intermediate shaft. The beneficial effect of using the above-mentioned bidirectional forced lubrication system for a transfer case is that by setting multiple oil outlet passages, lubrication of the input shaft and the intermediate shaft is achieved, and the working efficiency and life of the entire transfer case are improved. And it can realize the bidirectional forced lubrication function, so as to force lubricate the input shaft and the intermediate shaft.

Description

Technical Field

[0001] The invention relates to the technical field of transmission system lubrication, and in particular to a bidirectional forced lubrication system for a transfer case. Background Art

[0002] The transfer case is a gear transmission system whose main function is to distribute the power output by the transmission to each drive axle and increase the torque. Its input shaft is connected to the second shaft of the transmission directly or through a universal joint. There are several output shafts, which are connected to each drive axle through a universal joint.

[0003] In the prior art, the conventional transfer case lubrication system has only the input shaft with a dedicated lubrication pipeline for forced lubrication, and the remaining lubricating oil flows to the intermediate shaft for secondary lubrication, so the intermediate shaft does not have a dedicated pipeline for forced lubrication. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a bidirectional forced lubrication system for a transfer case, which can perform forced lubrication on an intermediate shaft.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: a bidirectional forced lubrication system for a transfer case, comprising an oil tank, an oil suction channel, an oil pump and a lubricating oil channel;

[0006] The oil tank is connected to the oil pump through an oil suction passage, one end of the oil suction passage is connected to the oil tank, and the other end has two oil distribution passages, and both of the two oil distribution passages are provided with a one-way valve;

[0007] The oil pump is a bidirectional gear pump, and the inlet and outlet are respectively connected to the two oil passages;

[0008] One end of the lubricating oil channel is provided with two oil inlet channels, and the other end is provided with multiple oil outlet channels. Two one-way valves are provided on the two oil inlet channels and are respectively connected to the two oil distribution channels. The multiple oil outlet channels are respectively connected to various components of the input shaft and the intermediate shaft.

[0009] After the oil pump is started, the lubricating oil is pumped out from the oil tank through the oil suction passage, flows from one of the oil distribution passages to the oil pump, and flows into another oil distribution passage. Due to the action of the first check valve, the lubricating oil cannot flow back to the oil tank, and flows into the lubricating oil passage through the connected oil inlet passage. Due to the action of the second check valve, the lubricating oil cannot flow into another oil inlet passage, and finally flows into various components through multiple oil outlet passages.

[0010] The beneficial effects of the above-mentioned bidirectional forced lubrication system for a transfer case are: by setting up multiple oil outlets, lubrication of the input shaft and the intermediate shaft is achieved, and the working efficiency and life of the entire transfer case are improved. In addition, a bidirectional oil pump and a bidirectional oil outlet channel are used to achieve a bidirectional forced lubrication function, thereby forcibly lubricating the input shaft and the intermediate shaft.

[0011] Furthermore, the connection between the oil inlet passage and the oil distribution passage is arranged at a position between the one-way valve 1 and the oil pump.

[0012] After the oil pump draws the lubricating oil from one of the oil distribution passages to the other oil distribution passage, the one-way valve 1 can prevent the lubricating oil from flowing back to the oil tank and flows to the lubricating oil passage through the oil inlet passage.

[0013] Furthermore, the two one-way valves can both allow the lubricating oil to flow from the oil distribution channel to the oil pump.

[0014] One-way valve can prevent the lubricating oil from flowing back to the oil tank from another oil channel after passing through the oil pump.

[0015] Furthermore, the two one-way valves 2 can both allow the lubricating oil to flow from the oil inlet passage to the oil outlet passage.

[0016] The one-way valve 2 can prevent the lubricating oil from entering the lubricating oil passage and then flowing back to the oil distribution passage from another oil inlet passage.

[0017] Furthermore, four oil outlet passages are provided, which are respectively connected to the input front shaft, the input shaft rear bearing, the intermediate shaft front bearing and the intermediate shaft rear bearing.

[0018] The multiple oil outlets of the lubricating oil passage can flow the lubricating oil into the input front shaft, the input shaft rear bearing, the intermediate shaft front bearing and the intermediate shaft rear bearing, so as to perform forced lubrication on the input shaft and the output shaft.

[0019] Furthermore, a pressure control valve is provided on the lubricating oil channel, and the pressure control valve is connected to the oil tank.

[0020] When the oil pressure exceeds the pressure requirement for lubrication, the lubricating oil can be controlled to flow back into the oil tank to provide safety protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0022] Figure 1 A schematic diagram of a bidirectional forced lubrication system for a transfer case provided by an embodiment of the present invention;

[0023] Reference numerals:

[0024] 10-oil tank, 20-oil suction channel, 21-oil distribution channel, 22-one-way valve 1, 30-oil pump, 40-lubricating oil channel, 41-oil inlet channel, 42-oil outlet channel, 43-one-way valve 2, 44-pressure control valve. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0026] See also Figure 1 The present invention provides a bidirectional forced lubrication system for a transfer case, including an oil tank 10, an oil suction passage 20, an oil pump 30 and a lubricating oil passage 40. The oil pump 30 draws lubricating oil from the oil tank 10 through the oil suction passage 20, and the oil flows to the input shaft and the intermediate shaft through the lubricating oil passage 40.

[0027] Specifically, the oil tank 10 is connected to the oil pump 30 through the oil suction passage 20. One end of the oil suction passage 20 is connected to the oil tank 10, and the other end has two oil distribution passages 21. Both oil distribution passages 21 are provided with a one-way valve 22. The oil pump 30 is a bidirectional gear pump, and the inlet and outlet are respectively connected to the two oil distribution passages 21. One end of the lubricating oil passage 40 is provided with two oil inlet passages 41, and the other end is provided with a plurality of oil outlet passages 42. Both oil inlet passages 41 are provided with a one-way valve 2 43. The two oil inlet passages 41 are respectively connected to the two oil distribution passages 21, and the plurality of oil outlet passages 42 are respectively connected to the components of the input shaft and the intermediate shaft.

[0028] After the oil pump 30 is started, the lubricating oil is pumped out from the oil tank 10 through the oil suction passage 20, and the lubricating oil is pumped from one of the oil distribution passages 21 to the oil pump 30 according to the rotation direction of the bidirectional gear pump, and flows into the other oil distribution passage. Under the action of the one-way valve 1 22, the lubricating oil cannot flow back to the oil tank, and flows into the lubricating oil passage 40 through the connected oil inlet passage 41. Under the action of the one-way valve 2 43, the lubricating oil cannot flow into another oil inlet passage, and finally flows into various components through multiple oil outlet passages 42, realizing the lubrication of the input shaft and the intermediate shaft, so as to improve the working efficiency and life of the entire transfer case. In addition, the bidirectional oil pump and the bidirectional oil distribution passage realize the bidirectional forced lubrication function, thereby forcibly lubricating the input shaft and the intermediate shaft.

[0029] Specifically, the connection between the oil inlet channel 41 and the oil branch channel 21 is set at a position between the one-way valve 22 and the oil pump 30. After the oil pump 30 draws the lubricating oil from one of the oil branch channels 21 and flows to the other oil branch channel, the one-way valve 22 can prevent the lubricating oil from flowing back to the oil tank and can only flow to the lubricating oil channel 40 through the oil inlet channel 41.

[0030] The two one-way valves 1 can only allow the lubricating oil to flow from the oil distribution channel 21 to the oil pump 30, so as to prevent the lubricating oil from flowing back to the oil tank from the other oil distribution channel after passing through the oil pump. The two one-way valves 2 43 can only allow the lubricating oil to flow from the oil inlet channel 41 to the oil outlet channel 42, so as to prevent the lubricating oil from flowing back to the oil distribution channel from the other oil inlet channel after entering the lubricating oil channel.

[0031] In this embodiment, there are four oil outlet passages 42, which are respectively connected to the input front shaft, the input shaft rear bearing, the intermediate shaft front bearing and the intermediate shaft rear bearing. The multiple oil outlet passages 42 can flow lubricating oil into the input front shaft, the input shaft rear bearing, the intermediate shaft front bearing and the intermediate shaft rear bearing, and perform forced lubrication on the input shaft and the output shaft.

[0032] Specifically, a pressure control valve 44 is further provided on the lubricating oil passage 40, and the pressure control valve 44 is connected to the oil tank 10. When the oil pressure exceeds the pressure requirement, the pressure control valve 44 can control the lubricating oil to flow back into the oil tank to play a role of safety protection.

[0033] The working principle of the above-mentioned two-way forced lubrication system for a transfer case is as follows: after the oil pump 30 is started, the lubricating oil can be pumped out from the oil tank 10 through the oil suction passage 20 regardless of forward or reverse rotation. Under the action of the one-way valve 1 22, the lubricating oil flows from one of the oil passages 21 through the oil pump 30 into the other oil passage, and cannot flow back to the oil tank 10, and flows into the lubricating oil passage 40 through the connected oil inlet passage 41. Under the action of the one-way valve 2 43, the lubricating oil cannot flow into the other oil inlet passage, and finally flows to the various components of the input shaft and the intermediate shaft through multiple oil outlet passages 42 after passing through the pressure control valve 44.

[0034] By using the above two-way forced lubrication system for a transfer case, multiple oil outlets are provided to achieve lubrication of the input shaft and the intermediate shaft, thereby improving the working efficiency and life of the entire transfer case. In addition, by providing a two-way gear pump and a two-way oil outlet, in cooperation with a one-way valve, a two-way forced lubrication function is achieved, thereby forcibly lubricating the input shaft and the intermediate shaft.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the scope of the claims and specification of the present invention.

Claims

1. A two-way forced lubrication system for a transfer case, characterized in that: It includes oil tank, oil suction channel, oil pump and lubricating oil channel; The oil tank is connected to the oil pump through an oil suction passage, one end of the oil suction passage is connected to the oil tank, and the other end has two oil distribution passages, and both of the two oil distribution passages are provided with a one-way valve; The oil pump is a bidirectional gear pump, and the inlet and outlet are respectively connected to the two oil passages; One end of the lubricating oil channel is provided with two oil inlet channels, and the other end is provided with multiple oil outlet channels. Two one-way valves are provided on the two oil inlet channels and are respectively connected to the two oil distribution channels. The multiple oil outlet channels are respectively connected to various components of the input shaft and the intermediate shaft.

2. A two-way forced lubrication system for a transfer case according to claim 1, characterized in that: The connection point between the oil inlet passage and the oil distribution passage is arranged at a position between the one-way valve 1 and the oil pump.

3. A two-way forced lubrication system for a transfer case according to claim 2, characterized in that: The two one-way valves can both allow lubricating oil to flow from the oil distribution channel to the oil pump.

4. A two-way forced lubrication system for a transfer case according to claim 2, characterized in that: The two one-way valves 2 can both allow lubricating oil to flow from the oil inlet passage to the oil outlet passage.

5. The bidirectional forced lubrication system for a transfer case according to claim 1, characterized in that: There are four oil outlet passages, which are respectively connected to the input front shaft, the input shaft rear bearing, the intermediate shaft front bearing and the intermediate shaft rear bearing.

6. A two-way forced lubrication system for a transfer case according to claim 1, characterized in that: The lubricating oil passage is provided with a pressure control valve, and the pressure control valve is communicated with the oil tank.

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