Vertical planet wheel bearing oil supply structure and gear box

Abstract

The utility model relates to the technical field of gear boxes, in particular to a vertical planet wheel bearing oil supply structure and a gear box. The vertical planet wheel bearing oil supply structure comprises a planet carrier, a plurality of vertical planet shafts are connected to the planet carrier, and planet gears are connected to the vertical planet shafts through bearings. An oil supply channel is formed in the vertical planet shaft, an inlet of the oil supply channel is located in the upper end face of the vertical planet shaft, and an outlet of the oil supply channel corresponds to the upper end face of the bearing. During use, lubricating oil enters the oil supply channel downwards under the action of gravity. Lubricating oil moves downwards from an outlet of the oil supply channel to the upper surface of the bearing and permeates downwards into the bearing, and the upper section and the lower section of the bearing can be lubricated.

Description

Technical Field

[0001] The utility model relates to the technical field of gear boxes, in particular to a vertical planetary gear bearing oil supply structure and a gear box. Background Art

[0002] Vertical planetary gearboxes are widely used in building materials, thermal power, nuclear power and other industries. The original vertical planetary gearboxes, due to the small power and size, mostly use oil immersion lubrication. With the increase of power and size, spray lubrication is now mostly used. However, since the planet carrier will throw out the lubricating oil sprayed on its surface when rotating, the bearings of the planetary gears cannot be effectively lubricated.

[0003] In order to solve the above problems, a Chinese patent (publication number: CN113195945A) provides a planetary gear transmission (see Figure 1 ), which introduces the lubricating oil on the planetary carrier 2 into the hole 7 through the oil collecting element 8b arranged on the planetary carrier 2, and introduces it into the middle part of the planetary bearing 4 through the hole 6, so as to fully lubricate the planetary bearing 4.

[0004] Although the above scheme can guide the lubricating oil on the planetary carrier into the middle of the planetary bearing for lubrication, there are also some problems during use. First, since the vertical planetary gearbox is arranged vertically, the lubricating oil will flow downward under the action of gravity. Supplying oil to the middle of the planetary bearing will enable the lower section of the planetary bearing to be fully lubricated, but the upper section cannot be effectively lubricated. Secondly, since the oil is supplied to the middle of the planetary bearing, it is necessary to open a hole in the middle of the planetary bearing so that the lubricating oil can enter the bearing for lubrication. Since the bearing itself has a high manufacturing precision, opening a hole in the middle of the bearing greatly increases the manufacturing cost of the bearing. Utility Model Content

[0005] The utility model provides a vertical planetary gear bearing oil supply structure and a gear box, aiming to solve the problem that the upper section of the planetary bearing in the existing planetary gear cannot be fully lubricated.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] In a first aspect, a vertical planetary gear bearing oil supply structure is provided, comprising a planetary carrier, to which a plurality of vertical planetary shafts are connected, the vertical planetary shafts are connected to planetary gears via bearings, an oil supply channel is provided on the vertical planetary shafts, an inlet of the oil supply channel is located on the upper end surface of the vertical planetary shaft, and an outlet of the oil supply channel is located on the side of the vertical planetary shaft and corresponds to the upper end surface of the bearing.

[0008] By adopting the above solution, when in use, the lubricating oil is poured on the upper end surface of the planet carrier, and the lubricating oil enters the oil supply channel from the inlet of the oil supply channel under the action of gravity. The lubricating oil in the oil supply channel enters the gap between the vertical planetary shaft and the planetary gear from the outlet, and under the action of gravity, the lubricating oil moves downward to the upper surface of the bearing and penetrates downward into the inside of the bearing, which can play a lubricating role on both the upper and lower sections of the bearing.

[0009] The utility model is further configured such that the planet carrier is a double-side plate planet carrier, the bearing is located between the two side plates of the planet carrier, the upper and lower sides of the bearing are provided with positioning sleeves, the positioning sleeves are arranged on the corresponding vertical planet shaft, and the positioning sleeve located on the upper side of the bearing is provided with a through hole corresponding to the outlet of the oil supply channel. The position of the bearing on the vertical planet shaft can be accurately positioned by the two positioning sleeves.

[0010] The utility model is further configured such that an annular oil baffle is provided between the positioning sleeve located on the upper side of the bearing and the corresponding planetary gear, and the oil baffle is provided on the upper side of the outlet of the oil supply channel. Due to the centrifugal force of the lubricating oil when the planet carrier rotates at high speed, part of the lubricating oil overflows upward from the gap between the planetary gear and the planet carrier, so that part of the lubricating oil does not play a role in lubricating the bearing. The oil baffle can prevent most of the lubricating oil from flowing out from the gap between the planet carrier and the planetary gear.

[0011] The utility model is further configured that a mounting groove is opened on the inner side of the planetary gear along the circumferential direction, and the outer edge of the oil baffle plate is connected to the mounting groove. The oil baffle plate can be conveniently installed between the positioning sleeve and the planetary gear and positioned above the bearing through the mounting groove.

[0012] The utility model is further configured such that a limiting groove is provided on the inner side wall of the installation groove along the circumferential direction, an elastic retaining ring is connected in the limiting groove, and the lower side of the elastic retaining ring is connected to the oil baffle plate. Due to the blocking effect of the elastic retaining ring, the oil baffle plate will not fall out upward, thereby effectively fixing the position of the oil baffle plate. And because the elastic retaining ring is elastic, it can be easily removed from the limiting groove, thereby facilitating the installation and removal of the oil baffle plate.

[0013] The utility model is further configured such that an oil collecting hole is opened in the axial direction on the upper end surface of the vertical planetary shaft, an oil outlet hole is opened in the radial direction on the side surface of the vertical planetary shaft, and one end of the oil outlet hole is connected with the oil collecting hole to form the oil supply channel. Since the oil collecting hole is opened in the axial direction and the oil outlet hole is opened in the radial direction, the following functions are mainly achieved: on the one hand, the two are convenient to process on the vertical planetary shaft; on the other hand, a shorter oil supply channel can be formed so that the lubricating oil can quickly reach the bearing.

[0014] The utility model is further configured such that the lower end of the oil collecting hole extends downward to form a sediment groove, and the horizontal height of the sediment groove is lower than the horizontal height of the oil outlet hole. Since the lubricating oil may carry some debris, these debris enter the bearing and cause adverse effects on the bearing. The debris can be collected by the sediment groove to prevent the debris from entering the bearing and causing adverse effects on the bearing. During repair or maintenance, the debris in the sediment groove can also be taken out through the oil outlet hole, which is convenient for maintenance personnel to operate.

[0015] The utility model is further configured such that the upper end surface of the planetary carrier is fixedly connected with an annular oil collecting baffle, and the oil collecting baffle is used to guide the lubricating oil that moves from the upper end surface of the planetary carrier away from the middle of the planetary carrier into the oil supply channel. During the rotation of the planetary carrier, under the action of centrifugal force, the lubricating oil on the upper end surface of the planetary carrier moves toward the oil collecting baffle. The lubricating oil poured on the upper end surface of the planetary carrier is blocked by the oil collecting baffle and under the action of gravity, enters the oil supply channel from the entrance of the oil supply channel, which can effectively prevent the lubricating oil from splashing out to the outside of the planetary carrier, so that the lubricating oil can be fully used to lubricate the bearings.

[0016] The utility model is further configured that the lower end of the oil collecting baffle has a folded edge extending outward in the horizontal direction, and the folded edge is fixedly connected to the planetary frame by bolts. The folded edge can be conveniently fixed to the planetary frame.

[0017] In a second aspect, a gearbox is provided, comprising the vertical planetary gear bearing oil supply structure mentioned above.

[0018] In summary, the vertical planetary gear bearing oil supply structure and gear box provided by the utility model have at least the following beneficial effects:

[0019] 1. Able to fully lubricate the entire bearing on the vertical planetary shaft.

[0020] 2. Simple structure and low processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any novel labor.

[0022] Figure 1 is a structural diagram of a planetary gear transmission in the background art (in which the flow direction of the lubricating oil is indicated by arrows);

[0023] Figure 2is a cross-sectional schematic diagram of the vertical planetary gear bearing oil supply structure in the embodiment assembled on the gear box (wherein the flow direction of the lubricating oil is indicated by arrows);

[0024] Figure 3 yes Figure 2 Magnified view at A in the middle;

[0025] Figure 4 It is a schematic structural diagram of the vertical planetary gear bearing oil supply structure in the embodiment assembled on the gear box in a top view (wherein the flow direction of the lubricating oil is indicated by arrows).

[0026] The reference numerals in the figure are: 1, planetary carrier, 101, side plate, 102, rib plate, 2, vertical planetary shaft, 3, bearing, 4, planetary gear, 5, oil supply channel, 501, oil collecting hole, 502, oil outlet hole, 503, sediment tank, 6, oil collecting baffle, 7, positioning sleeve, 8, through hole, 9, oil baffle plate, 10, elastic retaining ring, 11, folded edge, 12, transmission shaft, 13, sun gear, 14, inner ring gear. DETAILED DESCRIPTION

[0027] In order to make those skilled in the art better understand the technical solution of the utility model, the following Figure 1-4 The utility model is further described in detail with specific implementation methods.

[0028] See also Figure 2-4The present embodiment provides a vertical planetary gear bearing oil supply structure, including a planetary frame 1, which is a prior art. The present embodiment preferably adopts an integral double-side plate planetary frame in the prior art. The integral double-side plate planetary frame includes two side plates 101 spaced apart from each other, and the two side plates 101 are connected by a rib plate 102, and the side plates 101 and the rib plate 102 are integrally formed. A plurality of vertical planetary shafts 2 are connected to the planetary frame 1, and three vertical planetary shafts 2 are specifically provided in the present embodiment. The vertical planetary shaft 2 is fixedly connected to the planetary frame 1, and the vertical planetary shaft 2 is vertically arranged. A planetary gear 4 is connected to the vertical planetary shaft 2 through a bearing 3, and the planetary gear 4 is located between the two side plates 101. The bearing 3 can specifically adopt an existing needle bearing. Among them, an oil supply channel 5 is opened on the vertical planetary shaft 2, and the inlet of the oil supply channel 5 is located on the upper end surface of the vertical planetary shaft 2, and the outlet of the oil supply channel 5 corresponds to the upper end surface of the bearing 3. Specifically, an oil collecting hole 501 is axially opened in the middle of the upper end surface of the vertical planetary shaft 2, and the lower end of the oil collecting hole 501 does not pass through the vertical planetary shaft 2. An oil outlet hole 502 is radially opened on the side surface of the vertical planetary shaft 2, and the left end of the oil outlet hole 502 is connected to the oil collecting hole 501 to form an oil supply channel 5. An annular oil collecting baffle 6 is fixedly connected to the upper end surface of the planetary carrier 1, and the oil collecting baffle 6 is specifically located on the upper end surface of the side plate 101 of the upper end surface of the planetary carrier 1. The annular oil collecting baffle 6 is concentrically arranged with the planetary carrier 1. The oil collecting baffle 6 is used to guide the lubricating oil moving from the upper end surface of the planetary carrier 1 away from the middle of the planetary carrier 1 into the oil supply channel 5, and the projection of the inlet of the oil supply channel 5 on the water surface is at least partially located within the range enclosed by the oil collecting baffle 6. The projection of the entrance of the oil supply channel 5 on the horizontal plane within the area enclosed by the oil collecting baffle 6 is adjusted according to actual needs, and the lubricating oil within the enclosed area of ​​the oil collecting baffle 6 can smoothly enter the oil supply channel 5. In order to make it easier for the lubricating oil to enter the oil collecting hole 501, the diameter of the upper section of the oil collecting hole 501 is preferably larger than the diameter of the lower section in this embodiment. In order to collect the debris carried by the lubricating oil, the lower end of the oil collecting hole 501 further extends downward to form a sediment groove 503, and the horizontal height of the sediment groove 503 is lower than the horizontal height of the oil outlet hole 502. In order to facilitate the installation of the oil collecting baffle 6, the lower end of the oil collecting baffle 6 is preferably provided with a folded edge 11 extending outward in the horizontal direction in this embodiment, and the folded edge 11 is fixedly connected to the planetary carrier 1 by bolts. In this embodiment, the oil collecting baffle 6 and the folded edge 11 together enclose the upper end of the oil collecting hole 501 on the inner side to ensure the diversion effect on the lubricating oil.

[0029] By adopting the above scheme, when in use, the lubricating oil is poured on the upper end surface of the planetary carrier 1. During the rotation of the planetary carrier 1, under the action of centrifugal force, the lubricating oil on the upper end surface of the planetary carrier 1 moves toward the oil collecting baffle 6. With the continuous addition of lubricating oil, an oil pool is formed on the upper end surface of the planetary carrier 1 within the enclosed range of the oil collecting baffle 6. The lubricating oil is blocked by the oil collecting baffle 6 and under the action of gravity, and enters the oil supply channel 5 from the entrance of the oil supply channel 5. The lubricating oil enters the gap between the vertical planetary shaft 2 and the planetary gear 4 from the outlet of the oil supply channel 5. Under the action of gravity, the lubricating oil moves downward to the upper surface of the bearing 3 and penetrates downward into the interior of the bearing 3, which can lubricate both the upper and lower sections of the bearing 3.

[0030] In order to facilitate the positioning of the bearing 3, positioning sleeves 7 are provided on both the upper and lower sides of the bearing 3. The positioning sleeves 7 are sleeved on the corresponding vertical planetary shaft 2. The positioning sleeve 7 located on the upper end surface of the bearing 3 is provided with a through hole 8 corresponding to the outlet of the oil supply channel 5. The position of the bearing 3 on the vertical planetary shaft 2 is positioned by two positioning sleeves 7 to ensure the stable connection between the planetary gear 4 and the externally connected transmission components.

[0031] Since the vertical planetary shaft 2 and the corresponding planetary gear 4 are connected through the bearing 3, there is a gap between the vertical planetary shaft 2 and the inner wall of the corresponding planetary gear 4, and there is a gap between the planetary gear 4 and the side plate 101 of the planetary carrier 1, so that the lubricating oil coming out of the outlet of the oil supply channel 5 can overflow outward through the channel formed by the above-mentioned two gaps, so that part of the lubricating oil cannot play a lubricating effect on the bearing 3. In this embodiment, an annular oil baffle plate 9 is further provided between the positioning sleeve 7 located on the upper side of the bearing 3 and the corresponding planetary gear 4. The oil baffle plate 9 is concentrically arranged with the positioning sleeve 7, and the oil baffle plate 9 is arranged on the upper side of the outlet of the oil supply channel 5. Specifically, a mounting groove is opened along the circumferential direction on the inner side of the planetary gear 4, and the outer edge of the oil baffle plate 9 is connected to the mounting groove. Among them, the mounting groove has a side wall and a bottom wall, the lower side of the oil baffle plate 9 is in contact with the bottom wall, and the outer edge of the oil baffle plate 9 is in contact with the side wall. In order to facilitate the fixing of the oil baffle plate 9, a limiting groove is provided on the inner side wall of the installation groove along the circumferential direction, and an elastic retaining ring 10 is connected in the limiting groove, and the lower side of the elastic retaining ring 10 abuts against the oil baffle plate 9. The elastic retaining ring 10 is a prior art, and can be elastically compressed inward to reduce the diameter of the elastic retaining ring 10. The gap between the positioning sleeve 7 and the planetary gear 4 is blocked by the oil baffle plate 9 to prevent the lubricating oil from overflowing upward.

[0032] Also, please continue to read Figure 2 and Figure 4Based on the same inventive concept, the utility model also provides a gearbox, including the above-mentioned vertical planetary gear bearing 3 oil supply structure. It also includes a transmission shaft 12, a sun gear 13 and an inner gear ring 14. The transmission shaft 12 is fixedly connected to the planet carrier 1 by bolts, the sun gear 13 is located inside the planet carrier 1, and the sun gear 13 is meshed with all the planetary gears 4. All the planetary gears 4 are located inside the inner gear ring 14, and all the planetary gears 4 are meshed with the inner gear ring 14.

[0033] It should be noted that the words indicating direction in this article, such as up and down, are all based on Figure 1 The setting of the direction is only for the convenience of description and has no other specific meaning.

[0034] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0035] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A vertical planetary gear bearing oil supply structure, comprising a planet carrier (1), the planet carrier (1) is connected to a plurality of vertical planetary shafts (2), the vertical planetary shafts (2) are connected to planetary gears (4) via bearings (3), characterized in that: The vertical planetary shaft (2) is provided with an oil supply channel (5), the inlet of the oil supply channel (5) is located on the upper end surface of the vertical planetary shaft (2), and the outlet of the oil supply channel (5) is located on the side of the vertical planetary shaft (2) and corresponds to the upper end surface of the bearing (3).

2. A vertical planetary gear bearing oil supply structure as claimed in claim 1, characterized in that: The planet carrier (1) is a double-sided plate type planet carrier, the bearing (3) is located between two side plates (101) of the planet carrier (1), and positioning sleeves (7) are provided on both upper and lower sides of the bearing (3), the positioning sleeves (7) are sleeved on the corresponding vertical planet shaft (2), and the positioning sleeve (7) located on the upper side of the bearing (3) is provided with a through hole (8) corresponding to the outlet of the oil supply channel (5).

3. A vertical planetary gear bearing oil supply structure as claimed in claim 2, characterized in that: An annular oil baffle plate (9) is provided between the positioning sleeve (7) located on the upper side of the bearing (3) and the corresponding planetary gear (4), and the oil baffle plate (9) is arranged on the upper side of the outlet of the oil supply channel (5).

4. A vertical planetary gear bearing oil supply structure as claimed in claim 3, characterized in that: The inner side of the planetary gear (4) is provided with a mounting groove along the circumferential direction, and the outer edge of the oil baffle plate (9) is connected to the mounting groove.

5. A vertical planetary gear bearing oil supply structure as claimed in claim 4, characterized in that: A limiting groove is provided on the inner side wall of the installation groove along the circumferential direction, an elastic retaining ring (10) is connected in the limiting groove, and the lower side of the elastic retaining ring (10) is connected to the oil baffle plate (9).

6. A vertical planetary gear bearing oil supply structure as claimed in any one of claims 1 to 5, characterized in that: An oil collecting hole (501) is axially provided on the upper end surface of the vertical planetary shaft (2), and an oil outlet hole (502) is radially provided on the side surface of the vertical planetary shaft (2); one end of the oil outlet hole (502) is connected to the oil collecting hole (501) to form the oil supply channel (5).

7. A vertical planetary gear bearing oil supply structure as claimed in claim 6, characterized in that: The lower end of the oil collecting hole (501) extends downward to form a sediment groove (503), and the level of the sediment groove (503) is lower than the level of the oil outlet hole (502).

8. The vertical planetary gear bearing oil supply structure according to claim 1, characterized in that: An annular oil collecting baffle (6) is fixedly connected to the upper end surface of the planet carrier (1), and the oil collecting baffle (6) is used to guide the lubricating oil moving from the upper end surface of the planet carrier (1) in a direction away from the middle of the planet carrier (1) into the oil supply channel (5).

9. A vertical planetary gear bearing oil supply structure as claimed in claim 8, characterized in that: The lower end of the oil collecting baffle (6) has a folded edge (11) extending outward in a horizontal direction, and the folded edge (11) is fixedly connected to the planet carrier (1) by means of bolts.

10. A gear box, characterized in that: It comprises the vertical planetary gear bearing oil supply structure as described in any one of claims 1 to 9.

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