Upper gear lubricating structure

Abstract

The utility model discloses an upper gear lubricating structure which comprises an upper bevel gear and a shaft sleeve arranged in a shaft hole of the upper bevel gear. The upper surface of a web plate of the upper bevel gear is provided with an oil seepage groove which is concave downwards, and a hub of the upper bevel gear is provided with a first oil inlet hole which is communicated with the oil seepage groove and the inner ring face of the upper bevel gear shaft hole. The inner ring face of the shaft sleeve is provided with a spiral lubricating oil channel, and the shaft sleeve is provided with a second oil inlet hole which enables the lubricating oil channel to be communicated with the first oil inlet hole. According to the upper gear lubricating structure, the upper portion of the upper bevel gear can be conveniently lubricated, and therefore the overall lubricating effect of the upper bevel gear is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gearboxes, and particularly to an upper gear lubrication structure. Background Art

[0002] The lubrication structure is an important part of a multi-axis and multi-transmission component structure such as a gearbox, directly affecting its service life and performance. In some gearboxes, there are vertically arranged shafts, such as the intermediate shaft for arranging upper and lower bevel gears. The lower bevel gear is located at the lower part of the housing and can adopt various lubrication methods such as immersion. However, the upper bevel gear is arranged near the top of the housing, and bearings and retaining rings are arranged on the shaft above the upper bevel gear. In order to increase the strength of the force, the connection part with the shaft is also specially heightened and thickened and other structures, which limit the possibility of lubrication from above the upper bevel gear. Furthermore, the lubrication of the upper bevel gear mostly adopts the method of arranging lubricating oil holes communicating with the shaft hole on the hub, and some even directly lubricate the upper bevel gear with the lubricating liquid splashed by the rotation of the lower transmission component. These methods can only lubricate a certain part of the lower part of the upper bevel gear, and there is almost no lubrication on its upper part, and the overall lubrication effect of the upper bevel gear is limited. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide an upper gear lubrication structure, which can conveniently lubricate the upper part of the upper bevel gear, thereby improving the overall lubrication effect of the upper bevel gear.

[0004] In order to achieve the above purpose, the utility model is realized by the following technical solutions: The upper gear lubrication structure includes:

[0005] An upper bevel gear and a shaft sleeve arranged in the shaft hole of the upper bevel gear;

[0006] An oil seepage groove recessed downward is arranged on the upper surface of the web of the upper bevel gear, and a first oil inlet hole communicating the oil seepage groove with the inner ring surface of the shaft hole of the upper bevel gear is opened on the hub of the upper bevel gear; and

[0007] A spiral lubricating oil passage is arranged on the inner ring surface of the shaft sleeve, and a second oil inlet hole communicating the lubricating oil passage with the first oil inlet hole is opened on the shaft sleeve.

[0008] Further, the oil seepage groove is in a ring shape around the hub of the upper bevel gear.

[0009] Further, the oil seepage groove is arranged close to the hub.

[0010] Further, the outer end of the first oil inlet hole communicates with the side wall of the oil seepage groove and is flush with the bottom of the oil seepage groove.

[0011] Further, both the second oil inlet hole and the first oil inlet hole are inclined downward from outside to inside.

[0012] Furthermore, the second oil inlet hole is located at a position close to the middle in the axial direction of the bushing.

[0013] Furthermore, a plurality of through holes penetrating inside and outside are dispersedly arranged on the side wall of the bushing, and graphene is arranged in the through holes to form graphene lubrication points.

[0014] Furthermore, the lubricating oil passage passes through some of the graphene lubrication points.

[0015] Furthermore, the second oil inlet hole is arranged on one of the graphene lubrication points.

[0016] Furthermore, the upper and lower ends of the lubricating oil passage are through, or unilaterally through, or neither end is through the upper and lower ends of the bushing.

[0017] Advantages of the present utility model:

[0018] The above upper gear lubrication structure includes an upper bevel gear and a bushing arranged in the shaft hole of the upper bevel gear; a downwardly concave oil seepage groove is arranged on the upper surface of the web of the upper bevel gear, and a first oil inlet hole communicating the oil seepage groove with the inner ring surface of the shaft hole of the upper bevel gear is opened on the hub of the upper bevel gear; a spiral lubricating oil passage is arranged on the inner ring surface of the bushing, and a second oil inlet hole communicating the lubricating oil passage with the first oil inlet hole is opened on the bushing.

[0019] During use, the above structure can be rotatably sleeved on a central shaft vertically arranged in a transmission device such as a gearbox through the bushing, and the lubricating oil collected in the oil seepage groove flows into the lubricating oil passage successively through the first oil inlet hole and the second oil inlet hole, so as to form an oil inlet effect between the gear waists. In the working environment where the gearbox frequently reverses, bidirectional lubrication in which the lubricating oil moves upward and downward along the lubricating oil passage respectively under forward and reverse rotation conditions is realized, the lubrication between the gear shaft clearances is improved, and thus the overall lubrication effect of the gear is improved, thereby solving the situation that the upper part of the upper bevel gear cannot be lubricated, which in turn affects the overall lubrication effect of the entire upper bevel gear. Description of the drawings

[0020] In order to more clearly illustrate the specific embodiments of the present utility model, the drawings required for use in the specific embodiments will be briefly introduced below. In all the drawings, the components or parts do not necessarily draw according to the actual ratio.

[0021] Figure 1 It is a schematic diagram of the upper gear lubrication structure provided by an embodiment of the present utility model;

[0022] Figure 2 is Figure 1 a three-dimensional schematic diagram of the upper bevel gear and the bushing assembled together in the upper gear lubrication structure shown;

[0023] Figure 3 isFigure 1 Partial schematic diagram at position A in the middle

[0024] Figure 4 is Figure 1 A cross-sectional view of the bushing in a lubrication structure of an upper gear shown

[0025] Reference numerals:

[0026] 100, central shaft; 200, upper bevel gear; 210, oil seepage groove; 300, bushing; 310, lubricating oil passage; 320, second oil inlet hole; 400, hub; 410, first oil inlet hole; 500, graphene lubrication point Specific embodiments

[0027] Hereinafter, embodiments of the technical solution of the present invention will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and therefore are only examples and cannot be used to limit the protection scope of the present invention

[0028] Please refer to Figures 1 to 4 , the present invention provides an upper gear lubrication structure, which can be rotatably sleeved on a vertically arranged central shaft 100 in a transmission device such as a gearbox, and includes an upper bevel gear 200 and a bushing 300. It should be understood that, based on the conventional understanding of gear transmission, the upper bevel gear 200 here can be a bevel gear or other types of gears, as long as the web of the gear expands outward to form a larger surface, and the extension of this surface exceeds the structures such as upper bearings and retaining rings, so that the splashed lubricating oil can be received by the protruding web surface of the gear

[0029] Specifically, an oil seepage groove 210 is provided on the upper surface of the web of the upper bevel gear 200. The oil seepage groove 210 is used to collect the lubricating oil coming from the upper part of the upper bevel gear 200. Since the web of the bevel gear expands outward to form a larger surface, and the extension of this surface exceeds the structures such as upper bearings and retaining rings, more splashed lubricating oil can be received by the gear web, and the lubricating oil flows into the oil seepage groove 210 along the web surface. In addition, lubricating oil can also be sprayed or dripped onto the web by setting a lubricating oil supply hole and other structures on the housing above the web, and finally the lubricating oil converges into the oil seepage groove 210. In specific implementation, the oil seepage groove 210 can be set in a shape that is larger at the top and smaller at the bottom, which is further convenient for collecting lubricating oil

[0030] As a preferred embodiment, the oil seepage groove 210 can be in a ring shape around the hub 400 of the upper bevel gear 200, which is convenient for the lubricating oil to mix from all around towards the oil seepage groove 210. Of course, in other embodiments, there can also be multiple oil seepage grooves 210, and multiple connected oil seepage grooves 210 are circumferentially spaced around the axis of the upper bevel gear 200 on the upper surface of the upper bevel gear 200, which can also achieve the effect of collecting lubricating oil

[0031] As a more preferred embodiment, the oil seepage tank 210 can be arranged close to the hub 400 of the upper bevel gear, which can reduce the travel distance of the lubricating oil flowing into the shaft sleeve 300, improve the lubrication efficiency, and reduce the loss of the lubricating oil at the same time.

[0032] In this embodiment, a first oil inlet hole 410 is formed on the hub 400 of the upper bevel gear 200 to connect the oil seepage tank 210 with the inner ring surface of the shaft hole of the upper bevel gear 200.

[0033] As a preferred embodiment, the outer end of the first oil inlet hole 410 can be communicated with the side wall of the oil seepage tank 210 and be flush with the bottom of the oil seepage tank 210. Through this setting, all the lubricating oil converged in the oil seepage tank 210 can flow into the first oil inlet hole 410, preventing the waste of the lubricating oil.

[0034] In this embodiment, the outer ring surface of the shaft sleeve 300 is in interference fit with the shaft hole of the upper bevel gear 200. The shaft sleeve 300 is rotatably sleeved on the central shaft 100. A spiral lubricating oil passage 310 is arranged on the inner ring surface of the shaft sleeve 300. A second oil inlet hole 320 is formed on the shaft sleeve 300 to connect the lubricating oil passage 310 with the first oil inlet hole 410. In actual production, the lubricating oil passage 310 is preferably a standard spiral line structure with its axis coaxial with the shaft sleeve 300, which is convenient for standardized production.

[0035] As a preferred embodiment, the second oil inlet hole 320 and the first oil inlet hole 410 can be arranged to incline downward from the outside to the inside, which is convenient for the lubricating oil to seep into the lubricating oil passage 310 naturally by gravity, thereby improving the natural lubrication effect of the upper bevel gear 200. In addition, the second oil inlet hole 320 can be located at a position close to the middle in the axial direction of the shaft sleeve 300. That is, the lubricating oil inlet position is preferably located at the upper part of the upper bevel gear 200 as much as possible, thereby improving the lubrication effect of the upper part.

[0036] During use, the lubricating oil collected in the oil seepage tank 210 sequentially flows through the first oil inlet hole 410 and the second oil inlet hole 320 into the lubricating oil passage 310, thus forming an oil inlet effect between the gear waists. In the working environment where the gearbox frequently reverses, bidirectional lubrication in which the lubricating oil can flow upward and downward along the lubricating oil passage 310 under forward and reverse rotation conditions is realized, improving the lubrication between the gear shaft clearances, thereby improving the overall lubrication effect of the gear, and solving the situation that the upper part of the upper bevel gear 200 cannot be lubricated, which in turn affects the overall lubrication effect of the entire upper bevel gear 200.

[0037] In specific implementation, the upper and lower ends of the lubricating oil passage 310 may penetrate through, penetrate through unilaterally, or not penetrate through the upper and lower ends of the bushing 300 at all. That is, whether the upper and lower ends of the lubricating oil passage 310 penetrate through the upper and lower ends of the bushing 300 can be determined according to aspects such as lubricating fluid supply and flow rate, in combination with the specific situation of the amount of lubricating fluid collected by the oil leakage groove 210. For example, whether a lubricating oil supply structure such as dripping or spraying is provided above the upper bevel gear 200.

[0038] If a lubricating oil supply structure such as dripping or spraying is provided and the lubricating oil supply is sufficient, the upper and lower ends of the lubricating oil passage 310 can penetrate through the upper and lower ends of the bushing 300; when the top direct oil supply structure is not provided, since only the splashed lubricating oil can be received and the amount of lubricating oil available is small, if the area of the upper bevel gear 200 exceeding the upper bearing and other structures is also small, the speed and ability of collecting splashed lubricating fluid on its upper surface will be affected, then the two ends of the lubricating oil passage 310 need not penetrate through, and the lubricating oil can be closed in the lubricating oil passage 310, thereby maintaining the lubricating effect for a longer time; when the speed and ability of collecting splashed lubricating fluid on the upper surface are high and the overall amount of lubricating oil available is moderate, the upper end can penetrate through and the lower end can be closed, so as to control the flow rate of the lubricating oil.

[0039] In this embodiment, a plurality of through holes that penetrate inside and outside are dispersedly arranged on the side wall of the bushing 300, and graphene is arranged in the through holes, so that a plurality of graphene lubricating points 500 can be formed, and the lubricating effect can be further improved through graphene.

[0040] In specific implementation, the lubricating oil passage 310 can pass through some of the graphene lubricating points 500, so that the graphene lubrication and oil lubrication are better combined to enhance the lubricating effect. And the second oil inlet hole 320 can be arranged on one of the graphene lubricating points 500. That is, some of the graphene lubricating points 500 can be selected, and a second oil inlet hole 320 is arranged on each graphene lubricating point 500. Since graphene is relatively soft, during processing, the second oil inlet hole 320 can be processed on the graphene, or the graphene inside the corresponding graphene lubricating point 500 can be directly removed, so that the through hole directly forms the second oil inlet hole, which can improve the processing of the graphene lubricating point 500 and even complete drilling without special tools. Of course, the second oil inlet hole 320 can also be separately opened on the copper sleeve outside the graphene lubricating point 500, but special tools are required for processing, and in this case, the drill bit wears out quickly and the processing is not easy.

[0041] Adopting the above upper gear lubricating structure has the following advantages:

[0042] 1. Through the oil leakage groove 210 on the upper surface of the upper bevel gear 200, the first oil inlet hole 410, the second oil inlet hole 320, and the lubricating oil passage 310 on the bushing 300, a gear waist oil inlet passage can be formed. In the working environment where the transmission frequently reverses, two-way lubrication of the lubricating oil flowing upward and downward along the lubricating oil passage 310 under the forward and reverse working conditions can be realized, improving the lubrication between the gear shaft clearances, and thus improving the overall lubrication effect of the gears;

[0043] 2. The annular oil leakage groove 21 can collect more lubricating oil, and at the same time, it can be conveniently connected with the lubricating oil passage 310 at multiple points. In addition, the shape of the oil leakage groove 210 with a larger upper part and a smaller lower part further facilitates the collection of lubricating oil; and the oil leakage groove 210 is arranged close to the hub 400, which can not only improve the lubrication efficiency but also reduce the loss of lubricating oil;

[0044] 3. The outer end of the first oil inlet hole 410 is communicated with the side of the oil leakage groove 210 and is flush with the bottom of the oil leakage groove 210, which can make all the lubricating oil converged in the oil leakage groove 210 flow into the first oil inlet hole 410, preventing the waste of lubricating oil;

[0045] 4. Both the second oil inlet hole 320 and the first oil inlet hole 410 are arranged to incline downward, facilitating the natural infiltration of the lubricating oil by gravity;

[0046] 5. The graphene lubrication point 500 can improve the lubrication effect. Setting the second oil inlet hole 320 coaxially with the graphene through hole can reduce the processing difficulty.

[0047] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. The upper gear lubrication structure is characterized by: include: An upper bevel gear and a shaft sleeve arranged in the shaft hole of the upper bevel gear; An oil seepage groove sunken downward is arranged on the upper surface of the web of the upper bevel gear, and a first oil inlet hole connecting the oil seepage groove and the inner annular surface of the shaft hole of the upper bevel gear is opened on the hub of the upper bevel gear; The inner annular surface of the shaft sleeve is provided with a spiral lubricating oil passage, and the shaft sleeve is provided with a second oil inlet hole connecting the lubricating oil passage with the first oil inlet hole.

2. The upper gear lubrication structure according to claim 1, characterized in that: The oil seepage groove is in a ring shape surrounding the upper bevel gear hub.

3. The upper gear lubrication structure according to claim 1 or 2, characterized in that: The oil seepage groove is arranged close to the wheel hub.

4. The upper gear lubrication structure according to claim 3, characterized in that: The outer end of the first oil inlet hole is communicated with the side wall of the oil seepage groove and is flush with the bottom of the oil seepage groove.

5. The upper gear lubrication structure according to claim 1, characterized in that: The second oil inlet hole and the first oil inlet hole are both arranged to be inclined downward from the outside to the inside.

6. The upper gear lubrication structure according to claim 1, characterized in that: The second oil inlet hole is located near the middle of the shaft sleeve in the axial direction.

7. The upper gear lubrication structure according to claim 1, characterized in that: A plurality of through holes which penetrate inside and outside are dispersedly arranged on the side wall of the shaft sleeve, and graphene is arranged in the through holes to form graphene lubrication points.

8. The upper gear lubrication structure according to claim 7, characterized in that: The lubricating oil channel passes through part of the graphene lubrication points.

9. The upper gear lubrication structure according to claim 7 or 8, characterized in that: The second oil inlet hole is arranged on one of the graphene lubrication points.

10. The upper gear lubrication structure according to claim 1, characterized in that: The upper and lower ends of the lubricating oil passage are connected, or one side is connected, or both ends do not connect the upper and lower ends of the shaft sleeve.

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