One-to-five transfer case structure

Abstract

The invention provides a one-to-five transfer case structure which enables bearings and splines corresponding to output shafts and input shafts in a case body to be fully lubricated, guarantees lubrication of the input ends and the output ends and guarantees long-term stable work of the whole mechanism. The device comprises: a front cover; a rear cover; an intermediate shaft which is a first shaft; the two side shafts are respectively a second shaft and a third shaft; the front cover is fixedly installed on the open end face of the rear cover to form a transfer case cavity in a combined mode, installation holes are formed in the positions, corresponding to the first shaft, the second shaft and the third shaft, of the front cover and the rear cover respectively, and the areas, corresponding to the installation holes, of the first shaft, the second shaft and the third shaft are sleeved with bearings respectively. The corresponding ends of the first shaft, the second shaft and the third shaft are respectively positioned in the mounting holes through bearings, and transmission gears are respectively and fixedly sleeved on the first shaft, the second shaft and the third shaft corresponding to the axial positions of the transfer case cavity.

Description

Technical Field

[0001] This invention relates to the technical field of transfer cases, specifically to a one-to-five transfer case structure. Background Technology

[0002] The transfer case is a crucial component in multi-wheel drive vehicles (such as four-wheel drive vehicles). Its main function is to distribute torque from the transmission to the front and rear drive axles in a reasonable manner to achieve four-wheel or all-wheel drive. In some designs, it can also provide additional gear ratios to adapt to different driving conditions.

[0003] Existing transfer cases require an additional oil pump for lubrication when distributing power. In actual use, due to the complexity of the internal oil circuit, the power output of the transfer case generally does not exceed three. Consequently, large loaders typically require two transfer cases to complete power distribution. Therefore, how to design a 1-to-5 transfer case and its lubrication mechanism is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a one-to-five-way splitter gearbox structure, which ensures that the bearings and splines corresponding to each output shaft and input shaft within the gearbox are adequately lubricated, guaranteeing lubrication at both the input and output ends and ensuring the long-term stable operation of the entire mechanism.

[0005] A one-to-five-way splitter box structure, characterized in that it comprises: Front cover; Back cover; The intermediate axis, which is the first axis; And the two side axes, namely the second axis and the third axis; The front cover is fixedly mounted to the open end face of the rear cover to form a transfer case cavity. Mounting holes are respectively provided on the front and rear covers corresponding to the positions of the first, second, and third shafts. Bearings are respectively fitted into the areas of the first, second, and third shafts corresponding to the mounting holes. The corresponding ends of the first, second, and third shafts are positioned in the mounting holes via the bearings. Drive gears are respectively fixedly mounted on the first, second, and third shafts at their axial positions corresponding to the transfer case cavity. The drive gear of the first shaft meshes with the corresponding drive gears of the second and third shafts on both sides. An oil box is formed on the top of the transfer case cavity by the front and rear covers. The thickness of the front and rear covers... The width region of the oil box has a built-in guide oil groove. The inlet of the guide oil groove is connected to the oil box, and the end of the guide oil groove is connected to the top position area of ​​the oil seal mounting stop of the mounting hole. An oil seal mounting stop ring is provided on the inner side of the mounting hole. At least one connecting hole is opened on the oil seal mounting stop ring, and the connecting hole allows oil to flow back into the transfer case cavity. The two ends of the first shaft, the second shaft, and the third shaft are respectively set with keyway structures in the length direction. One end of the first shaft is inserted with an input flange, and the input flange is connected to an external power input source. The keyway structure at the other end of the first shaft and the keyway structures at both ends of the second and third shafts form five output ports.

[0006] Its further features are: The surfaces of the front and rear covers are provided with several protruding ribs, which ensure that the heat dissipation of the entire transfer case is sufficient and reliable. The oil box has an oil inlet notch at one end along its length and is closed at the other end along its length. The bottom plate of the oil box is arranged along the axial direction of the transfer case cavity. The oil inlet notch is directly below the transmission gear of the second or third shaft. When the transmission gear is rotating, the lubricating oil splashes into the oil inlet notch, which causes the lubricating oil to be sent into each guide oil groove along the oil box. Each of the oil seal mounting stop rings has a connecting hole, the height of which is located in the upper middle part of the height direction, which ensures that the lubricating oil fully lubricates the bearing and the spline of the corresponding output spline shaft; The oil box is formed by assembling a front cover and a rear cover, and the bottom plate of the oil box does not leak oil after being joined together. The keyway structure at the other end of the first shaft, and the keyway structures at both ends of the second and third shafts form five output ports, which are covered with encapsulation plates when no output is needed. The encapsulation cover is fixed to the stop end face outside the mounting hole by bolts at the four corners, which ensures that the lubricating oil in the transfer case is not easily leaked. The front cover also integrates an oil level observation hole, which facilitates the observation of the lubricating oil level in the transfer case; It also includes a bottom oil pump interface assembly, which allows the transfer case to be connected to an external oil pump.

[0007] With the solution of this invention, the transfer case cavity discharges oil to the oil box through the transmission gear. At the same time, mounting holes are opened in the front and rear covers corresponding to the bearing positions. The splined output shafts are inserted into the corresponding spline slots and are equipped with oil seals. At this time, the oil seal is mounted on the mounting stop ring. The oil box lubricates the splines of each splined output shaft, reducing wear. The oil seal mounting stop ring has at least one connecting hole. After the splines of the output shaft are completely immersed in lubricating oil, the excess lubricating oil returns to the inside of the housing through the connecting hole. While circulating and dissipating heat, it also lubricates the bearings. This ensures that the bearings and splines corresponding to each output shaft and input shaft in the housing are fully lubricated, ensuring lubrication at the input and output ends and guaranteeing the long-term stable operation of the entire mechanism. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the main structure of the present invention (with a packaging cover). Figure 2 This is a side view structural diagram of the present invention; Figure 3 This is a cross-sectional view of the present invention. Figure 4 This is a three-dimensional structural diagram of the present invention. Figure 1 (Remove the packaging cover); Figure 5 This is a three-dimensional structural diagram of the present invention. Figure 2 (Remove the packaging cover); Figure 6 This is a front view of the front cover of the present invention; Figure 7 This is a rear view of the front cover of the present invention; Figure 8 for Figure 6 Schematic diagram of the AA cross-section structure; The names corresponding to the serial numbers in the diagram are as follows: Front cover 10, oil observation hole 11, rear cover 20, first shaft 30, second shaft 40, third shaft 50, mounting hole 60, bearing mounting area 61, oil seal mounting stop 62, oil seal mounting stop ring 63, connecting hole 64, stop end face 65, bearing 70, transmission gear 80, oil box 90, oil inlet notch 91, base plate 92, transfer case cavity 100, input flange 110, sealing cover plate 120, oil pump interface assembly 130; Guide oil groove 1, inlet 101, end 102, protruding rib 2, keyway structure 3, bolt 4, oil seal 5. Detailed Implementation

[0009] A one-to-five-way moving box structure, see Figures 1-8It includes a front cover 10, a rear cover 20, a middle shaft, and two side shafts; The intermediate shaft is specifically the first shaft 30; the two side shafts are the second shaft 40 and the third shaft 50, respectively; the second shaft 40 and the third shaft 50 are respectively provided on both sides of the first shaft 30, and the first shaft 30, the second shaft 40, and the third shaft 50 are arranged parallel to each other at the same height. The front cover 10 is fixedly mounted on the open end face of the rear cover 20 to form the transfer case cavity 100. The front cover 10 and the rear cover 20 are respectively provided with mounting holes 60 at the positions corresponding to the first shaft 30, the second shaft 40, and the second shaft 50. The areas of the first shaft 30, the second shaft 40, and the third shaft 50 corresponding to the mounting holes 60 are respectively fitted with bearings 70. The corresponding ends of the first shaft 30, the second shaft 40, and the third shaft 50 are respectively positioned in the bearing mounting area 61 of the mounting holes 60 through the bearings 70. The first shaft 30, the second shaft 40, and the third shaft 50 are respectively fixedly fitted with transmission gears 80 at the axial positions of the transfer case cavity. The transmission gears 80 of the first shaft 30 mesh with and connect the second shafts 40 and the third shaft 50 on both sides. The transmission gear 80 corresponding to 0, the top of the transfer case cavity 100 is formed by the front cover 10 and the rear cover 20 to form an oil box 90. The thickness area of ​​the front cover 10 and the rear cover 20 corresponds to the width direction of the oil box 90 and has a built-in guide oil groove 1. The inlet 101 of the guide oil groove 1 is connected to the oil box, and the end 102 of the guide oil groove 1 is connected to the top position area of ​​the oil seal mounting stop 62 of the mounting hole 60. An oil seal mounting stop ring 63 is provided on the inner side of the mounting hole 60. At least one connecting hole 64 is opened on the oil seal mounting stop ring 63. The connecting hole 64 returns the oil to the transfer case cavity 100. The two ends of the first shaft 30, the second shaft 40 and the third shaft 50 are respectively set as keyway structures 3 in the length direction. One end of the first shaft 30 is connected to an input flange 110. The input flange 110 is connected to an external power input source. The keyway structure 3 at the other end of the first shaft 30, the keyway structures 3 at both ends of the second shaft 40 and the third shaft 50 form five output ports.

[0010] In practice, the surfaces of the front cover 10 and the rear cover 20 are provided with several protruding ribs 2, which make the heat dissipation of the entire transfer case sufficient and reliable. One end of the oil box 90 along its length is provided with an oil inlet notch 91, and the other end of the oil box 90 along its length is closed. The bottom plate 92 of the oil box 90 is arranged along the axial direction of the transfer case cavity 100. The oil inlet notch 91 is directly below the transmission gear 80 of the second shaft 40. When the transmission gear 80 of the second shaft 40 is rotating, the lubricating oil splashes into the oil inlet notch 91, which causes the lubricating oil to be sent into each guide oil groove 1 along the oil box 90. Each oil seal mounting stop ring 63 has a connecting hole 64. The height of the connecting hole 64 is located in the upper middle part of the height direction, which ensures that the lubricating oil fully lubricates the bearing 70 and the corresponding output spline shaft (not shown in the figure, but can be assembled according to the actual situation). The oil box 90 is formed by assembling the front cover 10 and the rear cover 20. The bottom plate 92 of the oil box 90 does not leak oil after being assembled. The keyway structure 3 at the other end of the first shaft 30, the keyway structures 3 at both ends of the second shaft 40 and the third shaft 50 form five output ports, which are covered with a sealing cover plate 120 when no output is needed. The encapsulation cover 120 is fixed to the stop end face 65 outside the mounting hole 60 by bolts 4 at the four corners, which ensures that the lubricating oil in the transfer case is not easily leaked. The front cover 10 also integrates an oil observation hole 11, which facilitates the observation of the lubricating oil level in the transfer case; It also includes a bottom oil pump interface assembly 130, which allows the transfer case to be connected to an external oil pump.

[0011] Its working principle is as follows: the transfer case cavity throws oil to the oil box through the transmission gear. At the same time, mounting holes are opened in the front cover and rear cover corresponding to the bearing positions. The splined output shaft is inserted into the corresponding spline groove and an oil seal 5 is installed. At this time, the oil seal is attached to the oil seal mounting stop, and the lubricating oil from the guide oil groove is sealed inside the oil seal, thereby lubricating the splines of each output shaft with splines, reducing wear. Since there is a connecting hole on the oil seal mounting stop ring, after the spline of the output shaft is completely immersed in the lubricating oil, the excess lubricating oil returns to the inside of the housing through the connecting hole. While circulating and dissipating heat, it also lubricates the bearings. This ensures that the bearings and splines corresponding to each output shaft and input shaft in the housing are fully lubricated, ensuring lubrication at the input and output ends and ensuring the long-term stable operation of the entire mechanism.

[0012] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0013] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A one-to-five-part separation gearbox structure, characterized in that, It includes: Front cover; Back cover; The intermediate axis, which is the first axis; And the two side axes, namely the second axis and the third axis; The front cover is fixedly mounted to the open end face of the rear cover to form a transfer case cavity. Mounting holes are respectively provided on the front and rear covers corresponding to the positions of the first, second, and third shafts. Bearings are respectively fitted into the areas of the first, second, and third shafts corresponding to the mounting holes. The corresponding ends of the first, second, and third shafts are positioned in the mounting holes via the bearings. Drive gears are respectively fixedly mounted on the first, second, and third shafts at their axial positions corresponding to the transfer case cavity. The drive gear of the first shaft meshes with the corresponding drive gears of the second and third shafts on both sides. An oil box is formed on the top of the transfer case cavity by the front and rear covers. The thickness of the front and rear covers... The width region of the oil box has a built-in guide oil groove. The inlet of the guide oil groove is connected to the oil box, and the end of the guide oil groove is connected to the top position area of ​​the oil seal mounting stop of the mounting hole. An oil seal mounting stop ring is provided on the inner side of the mounting hole. At least one connecting hole is opened on the oil seal mounting stop ring, and the connecting hole allows oil to flow back into the transfer case cavity. The two ends of the first shaft, the second shaft, and the third shaft are respectively set with keyway structures in the length direction. One end of the first shaft is inserted with an input flange, and the input flange is connected to an external power input source. The keyway structure at the other end of the first shaft and the keyway structures at both ends of the second and third shafts form five output ports.

2. The one-to-five-way splitter box structure according to claim 1, characterized in that: The surfaces of the front cover and the rear cover are provided with several protruding ribs.

3. The one-to-five-way splitter box structure according to claim 1, characterized in that: The oil box has an oil inlet notch at one end along its length and is closed at the other end along its length. The bottom plate of the oil box is arranged along the axial direction of the transfer case cavity. The oil inlet notch is located directly below the transmission gear of the second or third shaft. When the transmission gear is rotating, lubricating oil splashes into the oil inlet notch.

4. The one-to-five-way splitter box structure according to claim 1, characterized in that: Each of the oil seal mounting stop rings has a connecting hole, and the height of the connecting hole is located in the upper middle part of the height direction.

5. The one-to-five-way splitter box structure according to claim 1, characterized in that: The oil box is formed by assembling a front cover and a rear cover.

6. The one-to-five-way splitter box structure according to claim 1, characterized in that: The keyway structure at the other end of the first shaft, and the keyway structures at both ends of the second and third shafts form five output ports, which are covered with encapsulation plates when no output is needed.

7. The one-to-five-way splitter box structure according to claim 6, characterized in that: The encapsulation cover is fixed to the stop end face outside the mounting hole by bolts at the four corners.

8. The one-to-five-way splitter box structure according to claim 1, characterized in that: The front cover also integrates an oil level observation hole.

9. The one-to-five-way splitter box structure according to claim 1, characterized in that: It also includes an oil pump interface assembly at the bottom.

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