Planetary gear train mechanism with lubricating system

Abstract

The planetary gear train mechanism with the lubricating system comprises a planet carrier and a planetary gear sun gear, the planet carrier comprises a planet carrier shaft, an upper planet carrier plate and a lower planet carrier plate, planet shaft holes are formed in the upper planet carrier plate and the lower planet carrier plate, planet shafts are installed in the planet shaft holes, and planetary gears are arranged on the planet shafts in a sleeved mode; a sun gear hole is formed in the center of the lower planet carrier plate, and the lubricating system comprises a radial oil hole, an inclined oil hole, an annular oil collecting groove and an oil hole. According to the planetary gear train mechanism with the lubricating system, on the premise that parts such as an oil pump are not added, the design of a lubricating oil way of the planetary gear train mechanism is improved, bearings and gears can be fully lubricated, and the planetary gear train mechanism has the advantages of being simple in structure, easy to achieve, low in cost and the like. The lubricating oil is especially suitable for the lubricating requirement of a commercial vehicle transmission rear auxiliary box planetary mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of gear lubrication, in particular to a planetary gear train mechanism with a lubrication system. Background Art

[0002] Planetary gear mechanisms are one of the common ways of power transmission and are widely used in the automotive industry. In the field of commercial vehicle transmissions, there are two main types of rear auxiliary box power transmission structures, one is the parallel shaft structure and the other is the planetary mechanism. Whether the lubrication of gears and bearings in the planetary mechanism is sufficient directly affects the reliability of the planetary mechanism.

[0003] A common lubrication method currently is forced lubrication, that is, the lubricating oil is driven by an oil pump, and the lubricating oil is transported to the sun gear through an oil pipe or oil channel. This method can provide sufficient lubrication for the meshing of the sun gear and the planetary gears, but the lubrication of the planetary gear bearings cannot be guaranteed. At the same time, forced lubrication requires an oil pump structure, which increases the cost. Another common lubrication method is splash lubrication, that is, the gears and bearings are lubricated by the rotation of the planetary carrier and the rotation of the bottom planetary gear. This structure has a poor lubrication effect, and sometimes insufficient lubrication causes failure modes such as ablation of planetary bearings and gears. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a planetary gear train mechanism with a lubrication system to solve the problem that the lubrication structure in the prior art easily leads to poor lubrication effect and even causes failures such as ablation of planetary bearings and gears.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a planetary gear train mechanism with a lubrication system, comprising a planet carrier, planetary gears installed in the planet carrier, a sun gear matched with the planetary gears, and an outer gear ring matched with the planetary gears.

[0006] The planet carrier comprises a planet carrier shaft, an upper planet carrier plate installed at one end of the planet carrier shaft and a lower planet carrier plate arranged parallel to the upper planet carrier plate. There are multiple planet gear cavities between the upper planet carrier plate and the lower planet carrier plate, and planet gears are installed in the planet gear cavities.

[0007] The planetary gear is installed between the upper planetary frame plate and the lower planetary frame plate through the planetary shaft.

[0008] The upper planet carrier plate and the lower planet carrier plate are both provided with planet shaft holes, and the planet shafts are installed in the planet shaft holes.

[0009] A sun gear hole is opened at the center of the lower planet carrier plate, and the sun gear passes through the sun gear hole.

[0010] The planetary gear train mechanism with a lubrication system also includes a lubrication system, and the lubrication system includes:

[0011] A plurality of radial oil holes are opened radially inside the planetary gear, and the radial oil holes communicate with the radial inner side and the radial outer side of the planetary gear.

[0012] An inclined oil hole is provided on the planetary shaft, and both ends of the inclined oil hole are respectively provided on the side surfaces of the planetary shaft, and the inclined oil hole passes through the axis of the planetary shaft.

[0013] An annular oil collecting groove is provided on the inner wall of the sun gear hole.

[0014] An oil hole is opened on the inner wall of the annular oil collecting groove, the oil hole connects the annular oil collecting groove and the planet shaft hole on the lower planetary carrier plate, the number of the oil holes is the same as the number of the planet shaft holes on the lower planetary carrier plate, and the oblique oil hole is connected to the oil hole.

[0015] The utility model also has the following technical features:

[0016] The planet shaft is also provided with a planet shaft pin hole, and the upper planet frame plate is also provided with a planet frame plate pin hole, and the planet frame plate pin hole is connected with the outer wall of the upper planet frame plate and the planet shaft hole on the upper planet frame plate.

[0017] The planet shaft pin hole is communicated with the planet carrier plate pin hole and is connected via a cylindrical pin.

[0018] The axis of the planetary shaft pin hole and the axis of the inclined oil hole are in the same plane.

[0019] The top end of the planetary shaft is also provided with a straight groove, and the center line of the straight groove is perpendicular to the axis of the planetary shaft pin hole.

[0020] The planetary shaft is sleeved with a planetary needle roller bearing, and the planetary gear is sleeved on the planetary needle roller bearing.

[0021] An upper spacer is installed between the planetary gear and the upper planet carrier plate, and a lower spacer is installed between the planetary gear and the lower planet carrier plate.

[0022] Compared with the prior art, the utility model has the following technical effects:

[0023] (I) The utility model provides a planetary gear train mechanism with a lubrication system. Without adding parts such as an oil pump, the lubrication oil circuit of the planetary mechanism is improved and designed to provide sufficient lubrication for both bearings and gears. It has the characteristics of simple structure, easy implementation, low cost, etc. and is particularly suitable for the lubrication needs of the planetary mechanism of the rear auxiliary box of a commercial vehicle transmission.

[0024] (II) The planetary gear train mechanism with a lubrication system provided by the utility model has an annular oil collecting groove designed on the input side of the planet carrier, and oil holes are evenly distributed inside the annular oil collecting groove; at the same time, an oblique oil hole is provided on the planet shaft, and one end of the oblique oil hole is aligned with the oil hole in the annular oil collecting groove, and the lubricating oil flows out through the oil hole at the other end of the planet shaft to provide lubrication for the planet shaft bearing, and radial oil holes are evenly distributed in the radial direction of the planetary gear, and spacers are respectively provided on both sides of the planetary gear, which, on the one hand, improves the wear resistance between the planetary gear and the planet carrier, and at the same time forms a relatively closed cavity with the inner hole of the planetary gear to ensure full lubrication of the planetary needle roller bearing, and at the same time, the lubricating oil flows out from the radial oil hole of the planetary gear to lubricate the planetary gear and the sun gear in a targeted manner. At the same time, the lubricating oil splashes or flows into the annular oil collecting groove, forming a good closed-loop lubrication circuit.

[0025] (III) The planetary gear train mechanism with a lubrication system provided by the utility model has a simple structure and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the planetary gear train mechanism with a lubrication system of the utility model.

[0027] Figure 2 It is a schematic diagram of the top structure of the utility model.

[0028] Figure 3 It is a schematic diagram of the overall structure of the planet carrier of the utility model.

[0029] Figure 4 It is a schematic diagram of the overall structure of the planetary shaft of the utility model.

[0030] The meaning of each symbol in the accompanying drawings:

[0031] 1-Planet carrier, 2-Planet gear, 3-Sun gear, 4-Lubrication system, 5-Upper spacer, 6-Lower spacer

[0032] 1-1 planet carrier shaft, 1-2 upper planet carrier plate, 1-3 lower planet carrier plate, 1-4 planet shaft hole, 1-5 planet shaft, 1-6 sun gear hole, 1-7 planet shaft pin hole, 1-8 planet carrier plate pin hole, 1-9 cylindrical pin, 1-10 slot, 1-11 planetary needle roller bearing;

[0033] 4-1 radial oil hole, 4-2 oblique oil hole, 4-3 annular oil collecting groove, 4-4 oil hole.

[0034] The specific contents of the utility model are further explained in detail below in conjunction with the embodiments. DETAILED DESCRIPTION

[0035] All components in the present invention, unless otherwise specified, are components known in the prior art.

[0036] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of the present application fall within the protection scope of the present invention.

[0037] Embodiment 1:

[0038] This embodiment provides a planetary gear train mechanism with a lubrication system, such as Figure 1-Figure 4 As shown, it includes a planet carrier 1, planetary gears 2 installed in the planet carrier 1, a sun gear 3 matched with the planetary gears 2, and an outer ring gear matched with the planetary gears 2; the outer ring gear is not modified in this solution, so it does not appear in the attached drawings.

[0039] The planetary carrier 1 includes a planetary carrier shaft 1-1, an upper planetary carrier plate 1-2 installed at one end of the planetary carrier shaft 1-1, and a lower planetary carrier plate 1-3 arranged parallel to the upper planetary carrier plate 1-2. There are multiple planetary gear cavities between the upper planetary carrier plate 1-2 and the lower planetary carrier plate 1-3, and planetary gears 2 are installed in the planetary gear cavities.

[0040] The planetary gear 2 is installed between the upper planetary carrier plate 1-2 and the lower planetary carrier plate 1-3 through the planetary shaft 1-5.

[0041] The upper planet carrier plate 1-2 and the lower planet carrier plate 1-3 are both provided with planet shaft holes 1-4, and the planet shafts 1-5 are installed in the planet shaft holes 1-4.

[0042] The lower planet carrier plate 1-3 has a sun gear hole 1-6 at its center, and the sun gear 3 passes through the sun gear hole 1-6.

[0043] The planetary gear train mechanism with a lubrication system further includes a lubrication system 4, and the lubrication system 4 includes:

[0044] A plurality of radial oil holes 4 - 1 are radially opened inside the planetary gear 2 , and the radial oil holes 4 - 1 communicate with the radial inner side and the radial outer side of the planetary gear 2 .

[0045] An inclined oil hole 4-2 is opened on the planetary shaft 1-5, and both ends of the inclined oil hole 4-2 are opened on the side surfaces of the planetary shaft 1-5 respectively, and the inclined oil hole 4-2 passes through the axis of the planetary shaft 1-5.

[0046] An annular oil collecting groove 4-3 is provided on the inner wall of the sun gear hole 1-6.

[0047] The oil holes 4-4 are opened on the inner wall of the annular oil collecting groove 4-3, and the oil holes 4-4 connect the annular oil collecting groove 4-3 and the planetary shaft holes 1-4 on the lower planetary carrier plate 1-3. The number of the oil holes 4-4 is the same as the number of the planetary shaft holes 1-4 on the lower planetary carrier plate 1-3, and the inclined oil holes 4-2 are connected to the oil holes 4-4.

[0048] The annular oil collecting groove 4-3 on the planetary carrier 1 collects the lubricating oil at the bottom of the transmission case or the lubricating oil splashing in. When the planetary carrier 1 rotates and works, under the action of centrifugal force, the lubricating oil in the annular oil collecting groove 4-3 is driven to be thrown out through the oil hole 4-4, and flows in through the inclined oil hole 4-2 on the planetary shaft 1-5. The inclined oil hole 4-2 flows out to the inner hole of the planetary gear 2. The lubricating oil then passes through the radial oil hole 4-1 to lubricate the planetary gear 2 and the sun gear 3 in a targeted manner. The lubricating oil splashes or flows into the annular oil collecting groove 4-3 after lubrication, forming a good closed-loop lubrication circuit.

[0049] The present invention improves the design of the lubricating oil circuit of the planetary mechanism without adding parts such as an oil pump, can provide sufficient lubrication for the planetary bearings, planetary gears and sun gears, and has the characteristics of simple structure, easy implementation, low cost, etc., and is particularly suitable for the lubrication needs of the planetary mechanism of the rear auxiliary box of a commercial vehicle transmission.

[0050] As a preferred embodiment of this invention:

[0051] The planet shaft 1-5 is also provided with a planet shaft pin hole 1-7, and the upper planet carrier plate 1-2 is also provided with a planet carrier plate pin hole 1-8, and the planet carrier plate pin hole 1-8 connects the outer wall of the upper planet carrier plate 1-2 and the planet shaft hole 1-4 on the upper planet carrier plate 1-2.

[0052] The planet shaft pin hole 1-7 is communicated with the planet carrier plate pin hole 1-8 and is connected via a cylindrical pin 1-9.

[0053] As a preferred embodiment of this invention:

[0054] The axis of the planetary shaft pin hole 1-7 and the axis of the oblique oil hole 4-2 are in the same plane.

[0055] The top of the planetary shaft 1-5 is also provided with a straight groove 1-10, and the center line of the straight groove 1-10 is perpendicular to the axis of the planetary shaft pin hole 1-7.

[0056] The planetary shaft 1-5 is limited and prevented from rotating by placing a cylindrical pin 1-9 in the planetary shaft pin hole 1-7 and the planetary carrier plate pin hole 1-8. At the same time, the oblique oil hole 4-3 on the planetary shaft 1-5 is aligned with the oil hole 4-4 in the annular oil collecting groove 4-3. In addition, a straight groove 1-10 is provided on the end face of the planetary shaft 1-5 to facilitate the position of the planetary shaft pin hole 1-7 and the oblique oil hole 4-2 when the planetary gear 1-5 is assembled.

[0057] As a preferred embodiment of this invention:

[0058] The planetary shaft 1-5 is sleeved with a planetary needle roller bearing 1-11, and the planetary gear 2 is sleeved on the planetary needle roller bearing 1-11.

[0059] An upper spacer 5 is installed between the planetary gear 2 and the upper planet carrier plate 1-2, and a lower spacer 6 is installed between the planetary gear 2 and the lower planet carrier plate 1-3.

[0060] The planetary gear 2 is loosely sleeved on the planetary shaft 1-5, with a planetary needle bearing 1-11 arranged between the two, and a spacer 5 and a lower spacer 6 are installed between the upper and lower end surfaces between the planetary gear 2 and the planetary carrier 1, which improve the wear resistance between the planetary gear 2 and the planetary carrier 1 on the one hand, and form a relatively closed cavity with the inner hole of the planetary gear at the same time.

[0061] The specific working process of this embodiment is as follows:

[0062] The annular oil collecting groove 4-3 on the planetary carrier 1 collects the lubricating oil at the bottom of the transmission case or the lubricating oil splashing in. When the planetary carrier 1 rotates and works, under the action of centrifugal force, the lubricating oil in the annular oil collecting groove 4-3 is driven to be thrown out through the oil hole 4-4, and flows in through the inclined oil hole 4-2 on the planetary shaft 1-5, and the inclined oil hole 4-2 flows out to the inner hole of the planetary gear 2, providing sufficient lubrication for the planetary needle roller bearing 1-11 in a relatively closed cavity; the lubricating oil in the cavity then passes through the radial oil hole 4-1 to lubricate the planetary gear 2 and the sun gear 3 in a targeted manner, and the lubricated lubricating oil splashes or flows into the annular oil collecting groove 4-3, forming a good closed-loop lubrication circuit.

[0063] The above technical solutions are only preferred specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be thought of by any technician familiar with the field within the technical scope disclosed by the present utility model without creative work are all covered within the protection scope of the present utility model.

Claims

1. A planetary gear train mechanism with a lubrication system, comprising a planet carrier (1), planetary gears (2) mounted in the planet carrier (1), a sun gear (3) matched with the planetary gears (2), and an outer gear ring matched with the planetary gears (2); The planet carrier (1) comprises a planet carrier shaft (1-1), an upper planet carrier plate (1-2) mounted on one end of the planet carrier shaft (1-1), and a lower planet carrier plate (1-3) arranged parallel to the upper planet carrier plate (1-2); The upper planet carrier plate (1-2) and the lower planet carrier plate (1-3) are both provided with planet shaft holes (1-4), planet shafts (1-5) are installed in the planet shaft holes (1-4), and the planetary gears (2) are sleeved on the planet shafts (1-5); The lower planet carrier plate (1-3) has a sun gear hole (1-6) at its center, and the sun gear (3) passes through the sun gear hole (1-6), and is characterized in that: The planetary gear train mechanism with a lubrication system further comprises a lubrication system (4); The lubrication system (4) comprises: A plurality of radial oil holes (4-1) are opened radially inside the planetary gear (2), wherein the radial oil holes (4-1) are connected to the radial inner side and the radial outer side of the planetary gear (2); An inclined oil hole (4-2) is provided on the planetary shaft (1-5), wherein both ends of the inclined oil hole (4-2) are respectively provided on the side surfaces of the planetary shaft (1-5), and the inclined oil hole (4-2) passes through the axis of the planetary shaft (1-5); An annular oil collecting groove (4-3) is provided on the inner wall of the sun gear hole (1-6). An oil hole (4-4) is provided on the inner wall of the annular oil collecting groove (4-3), the oil hole (4-4) being connected to the annular oil collecting groove (4-3) and the planet shaft hole (1-4) on the lower planet carrier plate (1-3), the number of the oil holes (4-4) being the same as the number of the planet shaft holes (1-4) on the lower planet carrier plate (1-3), and the oblique oil hole (4-2) being connected to the oil hole (4-4).

2. The planetary gear train mechanism with a lubrication system according to claim 1, characterized in that: The planet shaft (1-5) is also provided with a planet shaft pin hole (1-7), and the upper planet carrier plate (1-2) is also provided with a planet carrier plate pin hole (1-8), and the planet carrier plate pin hole (1-8) is connected to the outer wall of the upper planet carrier plate (1-2) and the planet shaft hole (1-4) on the upper planet carrier plate (1-2); The planet shaft pin hole (1-7) is communicated with the planet carrier plate pin hole (1-8) and is connected via a cylindrical pin (1-9).

3. The planetary gear train mechanism with a lubrication system according to claim 2, characterized in that: The axis of the planetary shaft pin hole (1-7) and the axis of the oblique oil hole (4-2) are in the same plane; The top of the planetary shaft (1-5) is also provided with a straight groove (1-10), and the center line of the straight groove (1-10) is perpendicular to the axis of the planetary shaft pin hole (1-7).

4. The planetary gear train mechanism with a lubrication system according to claim 1, characterized in that: The planetary shaft (1-5) is sleeved with a planetary needle roller bearing (1-11), and the planetary gear (2) is sleeved on the planetary needle roller bearing (1-11); An upper spacer (5) is installed between the planetary gear (2) and the upper planet carrier plate (1-2), and a lower spacer (6) is installed between the planetary gear (2) and the lower planet carrier plate (1-3).

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