Output shaft lubricating structure

Abstract

The utility model provides an output shaft lubricating structure which enables lubricating oil to enter from a corresponding position of an output shaft, guarantees reasonable oil pressure of all oil ways in the output shaft, and improves reliability of a lubricating system. The transmission includes: an input shaft; the output shaft is provided with a central axial oil way and a plurality of groups of radial oil ways, and the radial oil way located at the tail end is a radial oil inlet hole; the oil collecting ring comprises a ring body, an oil inlet ring groove, an oil outlet ring groove and a plurality of radial holes, the oil inlet ring groove is formed in the outer ring surface of the ring body, the oil outlet ring groove is formed in the inner ring surface of the ring body, and the oil inlet ring groove and the oil outlet ring groove are communicated through the radial holes; an output shaft bearing cap; and an output end oil seal.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gearbox in -tank lubrication, concretely is a kind of output shaft lubrication structure. BACKGROUND

[0002] Common hybrid gearbox increases oil hole between motor and gearbox, oil is guided into the hole of input shaft by oil pump, then oil liquid is guided into the axial hole of output shaft by oil guide pipe between input shaft and output shaft, and oil liquid is guided out by radial hole of each gear position, lubricates each gear and output shaft bearing.This kind of lubrication structure's lubricating oil inlet is in the accessory of input shaft, and it is the same chamber with input shaft oil seal, oil way starting point, oil pressure is larger, input shaft oil seal is easily caused by pressure, causes oil leakage fault;And in actual operation, input shaft and output shaft exist relative motion, oil guide pipe between two shafts can only be tightly fitted with one end, and the other end is clearance fit, oil pressure will be discharged at this place, affect oil pressure subsequent transmission, in turn lead to oil guide pipe easy to damage;And in hybrid gearbox, input shaft is relatively short, output shaft is relatively long, in order to ensure that oil can be reliably conducted to the last end of output shaft corresponding to the end oil way, and taking into account the leakage part of oil guide pipe position, the oil pressure injected in the accessory of input shaft needs to be very large, causing great oil pressure waste. SUMMARY

[0003] In view of the above problems, the utility model provides an output shaft lubrication structure, which makes lubricating oil enter from the corresponding position of the output shaft, ensures reasonable oil pressure of all oil ways in the output shaft, and improves the reliability of the lubrication system.

[0004] An output shaft lubrication structure, characterized in that it comprises:

[0005] an input shaft;

[0006] an output shaft, the output shaft being provided with a central axial oil way and a plurality of groups of radial oil ways, the radial oil way at the end being a radial oil inlet hole;

[0007] a collecting ring, comprising a ring body, an oil inlet ring groove, an oil outlet ring groove and a plurality of radial holes, the outer ring surface of the ring body being provided with the oil inlet ring groove, the inner ring surface of the ring body being provided with the oil outlet ring groove, and the oil inlet ring groove and the oil outlet ring groove being connected by the plurality of radial holes;

[0008] an output shaft bearing cover;

[0009] and an output end oil seal.

[0010] The input shaft and output shaft are arranged coaxially. The output shaft is fitted with an output shaft bearing corresponding to the position of the output bearing cover. The outer ring of the output shaft bearing is fitted with the corresponding bearing positioning hole at the position of the inner ring at the front end of the output bearing cover. The output shaft is fixedly fitted with an oil collecting ring. The axial position of the oil inlet groove of the oil collecting ring corresponds to the outlet position of the oil inlet channel of the output bearing cover. The oil inlet of the oil inlet channel is connected to high-pressure oil. The oil outlet groove of the oil collecting ring corresponds to the radial oil inlet hole.

[0011] Its further features are:

[0012] The input shaft is fitted with a support bearing at its front end. The support bearing is located in the concave cavity at the front end of the output shaft. The central axial oil passage is connected to the concave cavity, which allows the lubricating oil in the central axial oil passage of the output shaft to be connected to the corresponding position of the support bearing, ensuring sufficient lubrication of the support bearing.

[0013] An output end oil seal is provided between the axial end of the output shaft bearing cover and the outer circumference of the output shaft. An assembly gap is left between the outer circumference of the oil collecting ring and the inner ring wall of the output shaft bearing cover. The assembly gap is made small to reduce oil leakage and reduce the oil pressure received by the output end oil seal, thereby ensuring the long-term reliable and stable use of the output end oil seal.

[0014] The central axial oil passage is connected to each group of radial oil passages, and several gears and shims are sleeved on the output shaft. Each group of radial oil passages is used to lubricate the gears and shims.

[0015] The oil pump pumps lubricating oil through the housing oil passage into the oil inlet channel on the output shaft bearing cover, and the oil inlet channel passes high-pressure oil into the oil inlet ring groove.

[0016] With this invention, the oil collecting ring and the output shaft are fixed together for rotation, the output shaft bearing cover is fixed in position, and there is a small clearance fit between the oil collecting ring and the inner ring wall of the output shaft bearing cover to ensure no friction. This clearance allows for a small amount of leakage, which can be lubricated by a lubricating oil seal. Because the clearance is small, it forms a wind wall during high-speed rotation, so the leakage itself will not be large. When the rotation is stopped, the existence of the small clearance allows the lubricating oil to flow back into the gearbox. The oil is sent to the radial oil inlet of the output shaft through the oil collecting ring at the rear end of the output shaft, and then lubricates the corresponding components through the central axial oil passage and several sets of radial oil passages. This allows the lubricating oil to enter from the corresponding position of the output shaft, ensuring reasonable oil pressure in all oil passages within the output shaft and improving the reliability of the lubrication system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main view structure of this utility model (with the input axis removed);

[0018] Figure 2 This is a partial structural schematic diagram of the main view of this utility model (with gears and spacers installed);

[0019] Figure 3 This is a three-dimensional schematic diagram of the oil collecting ring of this utility model;

[0020] Figure 4 This is a schematic diagram of the high-pressure oil inlet path of this utility model (as shown by the arrow);

[0021] The names corresponding to the serial numbers in the diagram are as follows:

[0022] Output shaft bearing 1, support bearing 2, gear 3, spacer 4, housing oil passage 5;

[0023] Input shaft 10, output shaft 20, central axial oil passage 21, radial oil passage 22, radial oil inlet hole 23, inner concave cavity 24, oil collecting ring 30, ring body 31, oil inlet ring groove 32, oil outlet ring groove 33, radial hole 34, output shaft bearing cover 40, bearing positioning hole 41, oil inlet channel 42, output end oil seal 50, flange 60, bushing 61, fastening screw 70, oil pump 80. Detailed Implementation

[0024] An output shaft lubrication structure, see Figures 1-4 It includes an input shaft 10, an output shaft 20, an oil collection ring 30, an output shaft bearing cover 40, and an output end oil seal 50;

[0025] The output shaft 20 is provided with a central axial oil passage 21 and several sets of radial oil passages 22, and the radial oil passage at the end is a radial oil inlet hole 23.

[0026] The oil collecting ring 30 includes a ring body 31, an oil inlet ring groove 32, an oil outlet ring groove 33, and several radial holes 34. The outer ring surface of the ring body 31 is provided with an oil inlet ring groove 32, and the inner ring surface of the ring body 31 is provided with an oil outlet ring groove 33. The oil inlet ring groove 32 and the oil outlet ring groove 33 are connected by several radial holes 34.

[0027] The input shaft 10 and the output shaft 20 are arranged coaxially. The output shaft 20 is fitted with an output shaft bearing 1 corresponding to the position of the output bearing cover 40. The outer ring of the output shaft bearing 1 is fitted with the corresponding bearing positioning hole 41 at the position of the inner ring at the front end of the output bearing cover 40. The output shaft 20 is fixedly fitted with an oil collecting ring 30. The axial position of the oil inlet ring groove 32 of the oil collecting ring 30 corresponds to the outlet position of the oil inlet channel 42 of the output bearing cover 40. The oil inlet of the oil inlet channel 42 is connected to high pressure oil. The oil outlet ring groove 33 of the oil collecting ring 30 is set to correspond to the radial oil inlet hole 23.

[0028] In a specific embodiment, a support bearing 2 is sleeved on the front section of the input shaft 10. The support bearing 2 is located in the concave cavity 24 at the front end of the output shaft 20. The central axial oil passage 21 is connected to the concave cavity 24, which allows the lubricating oil in the central axial oil passage 21 in the output shaft 20 to be connected to the corresponding position of the support bearing 2, ensuring sufficient lubrication for the support bearing 2.

[0029] An output end oil seal 50 is provided between the axial end of the output shaft bearing cover 40 and the outer circumference of the output shaft 20. An assembly gap is left between the outer circumference of the oil collecting ring 30 and the inner ring wall of the output shaft bearing cover 40. The assembly gap is made smaller to reduce oil leakage and reduce the oil pressure received by the output end oil seal 50, so as to ensure that the output end oil seal 50 can be used reliably and stably for a long time.

[0030] Oil pump 80 pumps lubricating oil through housing oil passage 5 into oil inlet channel 42 on output shaft bearing cover 40, and oil inlet channel 42 passes high pressure oil into oil inlet ring groove 32;

[0031] The central axial oil passage 21 is connected to each group of radial oil passages 22. Several gears 3 and shims 4 are sleeved on the output shaft 20. Each group of radial oil passages 22 is used to lubricate the gears 3 and shims 4.

[0032] In a specific embodiment, it also includes a flange 60, a bushing 61 of the flange 60 is fitted onto the output shaft 20, an oil collecting ring 30 is provided in the space between the rear end of the output shaft bearing 40 and the front end of the bushing 61 on the output shaft 20, an output end oil seal 50 is synchronously fitted onto the corresponding position of the bushing 61, and the radial outer end center of the flange 60 is locked to the end of the output shaft 20 by fastening screws 70.

[0033] Its working principle is as follows: The oil collecting ring and the output shaft are fixed together and rotate. The position of the output shaft bearing cover is fixed. There is a small clearance fit between the oil collecting ring and the inner ring wall of the output shaft bearing cover to ensure that there is no friction. A small amount of leakage is allowed at this clearance position. The leakage lubrication can be lubricated by the oil seal. Since the clearance is not large, a wind wall is formed when rotating at high speed, so the leakage itself will not be large. When it is not rotating, the existence of the small clearance allows the lubricating oil to flow back into the gearbox. It sends the oil into the radial oil inlet of the output shaft through the oil collecting ring at the rear end of the output shaft, and then lubricates the corresponding components through the central axial oil passage and several sets of radial oil passages.

[0034] Its beneficial effects are as follows:

[0035] 1. A lubrication inlet is provided on the output shaft. The oil collection ring effectively reduces the amount of oil entering the output end area, avoids the risk of excessive oil pressure in the output end oil seal, and ensures the oil pressure in the lubrication circuit inside the output shaft.

[0036] 2. The oil guide pipe between the input shaft and the output shaft is removed, thereby reducing oil pressure transmission loss and eliminating the oil guide pipe, a vulnerable component, thus improving system reliability;

[0037] 3. The overall lubrication circuit is ensured by machining, which ensures high reliability. It does not involve the matching of parts and ensures the lubrication of each shim and output shaft bearing. At the same time, it provides lubrication for the support bearing at the end.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] 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. An output shaft lubrication arrangement, characterized by, It comprises: an input shaft; an output shaft, which is provided with a central axial oil passage, a plurality of groups of radial oil passages, and a radial oil inlet hole at the end; a collecting ring, which comprises a ring body, an oil inlet ring groove, an oil outlet ring groove, and a plurality of radial holes, the outer ring surface of the ring body is provided with the oil inlet ring groove, the inner ring surface of the ring body is provided with the oil outlet ring groove, and the oil inlet ring groove and the oil outlet ring groove are connected by the plurality of radial holes; an output shaft bearing cover; and an output end oil seal; The input shaft and the output shaft are coaxially arranged, the output shaft is sleeved with an output shaft bearing corresponding to the position of the output bearing cover, the outer ring of the output shaft bearing is arranged in the corresponding bearing positioning hole of the inner ring position of the front end of the output bearing cover, the output shaft is sleeved with a collecting ring, the axial position of the oil inlet ring groove of the collecting ring corresponds to the outlet position of the oil inlet passage of the output bearing cover, the oil inlet of the oil inlet passage is connected to high-pressure oil, and the oil outlet ring groove of the collecting ring corresponds to the radial oil inlet hole.

2. An output shaft lubrication arrangement according to claim 1, characterized in that: The front section of the input shaft is sleeved with a support bearing, the support bearing is located in the inner concave cavity of the front end of the output shaft, and the central axial oil passage is connected to the inner concave cavity, so that the lubricating oil in the central axial oil passage of the output shaft is connected to the corresponding position of the support bearing.

3. An output shaft lubrication arrangement as claimed in claim 1, wherein: The output end oil seal is arranged between the axial end of the output shaft bearing cover and the outer ring of the output shaft, and a fitting gap is left between the outer ring of the collecting ring and the inner ring wall of the output shaft bearing cover.

4. An output shaft lubrication arrangement as claimed in claim 1, characterized in that: The central axial oil passage is connected to each group of radial oil passages, a plurality of gears and spacers are sleeved on the output shaft, and each group of radial oil passages is used to lubricate the gears and spacers.

5. An output shaft lubrication arrangement as claimed in claim 1, wherein: The oil pump pumps lubricating oil into the oil inlet passage on the output shaft bearing cover through the shell oil channel, and the oil inlet passage connects high-pressure oil to the oil inlet ring groove.

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