Forced lubrication structure for bearing of main speed reducer, main speed reducer and engineering vehicle

Abstract

The utility model discloses a main speed reducer bearing forced lubrication structure, a main speed reducer and an engineering vehicle. The main speed reducer bearing forced lubrication structure comprises an oil collecting structure and an oil path formed in a main speed reducer shell. The oil collecting structure is arranged at the position, close to a gear, of the inner wall of the main speed reducer shell and used for collecting gear oil splashed and thrown onto the inner wall of the main speed reducer shell from the gear. One end of the oil path is communicated with the oil collecting structure, the other end of the oil path is communicated with a lubricating point required by the bearing, and gear oil in the oil collecting structure flows to the lubricating point required by the bearing through oil flow. The utility model aims to solve the problem of poor lubrication of the bearing in the main speed reducer on the vehicle drive axle during operation, and realizes automatic and full lubrication of the bearing of the main speed reducer and ensures the service life of the main speed reducer by means of an oil collecting structure and oil diameter arrangement under the condition of not adding an oil pump, thereby prolonging the service life of the drive axle and the whole vehicle.

Description

Technical Field

[0001] The utility model relates to a forced lubrication structure for a main reducer bearing, belonging to the technical field of engineering vehicle transmission. Background Art

[0002] In the field of mining dump truck technology, the transportation conditions of mining dump trucks are particularly complex. They often run on bumpy, muddy and rugged roads, and even in harsh off-road conditions. Under such harsh conditions, the transmission of power is particularly important. The bearings in the main reducer are even more important as they support the rotation of the gear shaft and reduce the rotation friction coefficient. Lubrication is a necessary condition to ensure the normal operation of the bearing. Lubrication has an important impact on the fatigue life, friction, wear, vibration, etc. of the rolling bearing. About 40% of bearing damage is related to poor lubrication.

[0003] However, in the actual power transmission process, in some cases, the bearings in the main reducer cannot be fully lubricated. In the case of insufficient bearing lubrication, the bearings will wear or wear faster. There is no lubricating oil film inside the bearings, and metal is in direct contact with metal. The rolling elements of the bearings lose their damping capacity, and abnormal noise and vibration will occur. Although the abnormal noise and vibration at this time are slight, they are extremely harmful to the entire reducer and even the entire vehicle equipment. For this reason, it is urgent to develop a stable and practical main reducer bearing forced lubrication structure. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a forced lubrication structure for the main reducer bearings, which solves the problem that in the actual power transmission process, the bearings in the main reducer cannot be fully lubricated in some cases. When the bearings are not lubricated enough, the bearings may wear or wear faster, and the bearings may have abnormal noise and vibration.

[0005] The utility model is implemented according to the following technical solutions:

[0006] In a first aspect, the utility model provides a main reducer bearing forced lubrication structure, comprising:

[0007] At least one oil collection structure is arranged at a position adjacent to the gear on the inner wall of the main reducer housing, and is used to collect the gear oil splashed and thrown onto the inner wall of the main reducer housing by the gear;

[0008] An oil path opened in the main reducer housing has one end connected to the oil collection structure and the other end connected to the lubrication point required by the bearing. The gear oil in the oil collection structure flows to the lubrication point required by the bearing through the oil path.

[0009] In some embodiments, an oil storage tank is provided on the inner wall of the main reducer housing, which protrudes toward the gear and has an opening facing upward, and the oil storage tank serves as an oil collection structure.

[0010] In some embodiments, the diversion structure provided in the oil storage tank divides the oil storage tank into a first oil pool and a second oil pool; the oil path includes a first oil channel and a second oil channel; the first oil pool is connected to a bearing lubrication point located on the outside of the gear and mounted on the gear shaft through the first oil channel; the second oil pool is connected to a bearing lubrication point located on the inside of the gear and mounted on the gear shaft through the second oil channel.

[0011] In some embodiments, a protrusion is provided in the oil storage tank, which extends upward from the bottom surface of the oil storage tank and is connected to the two side surfaces of the oil storage tank during the extension process, and the protrusion is used as a diversion structure; the oil storage amount in the first oil pool and the second oil pool is adjusted by arranging protrusions at different positions of the oil storage tank.

[0012] In some embodiments, an auxiliary oil storage tank is provided on the inner wall of the main reducer housing, which protrudes toward another group of gear shaft pairs and opens upward, and the auxiliary oil storage tank is connected with the second oil channel through a third oil channel.

[0013] In some embodiments, the first oil passage is composed of an axial oil passage I and a radial oil passage II which are interconnected; the oil passage I is connected to the first oil pool, and the oil passage II is connected to the bearing lubrication point.

[0014] In some embodiments, a symmetrically arranged oil collection structure is provided on the inner wall of the main reducer housing on both sides of the gear.

[0015] In some embodiments, the lubrication point required by the bearing is the lubrication oil channel of the outer ring of the bearing, and the lubrication oil channel is connected to the rolling elements inside the bearing through the radial lubrication oil hole of the bearing.

[0016] In a second aspect, the utility model provides a main reducer equipped with the above-mentioned main reducer bearing forced lubrication structure.

[0017] In a third aspect, the utility model provides an engineering vehicle equipped with the above-mentioned main reducer.

[0018] Beneficial effects of the utility model:

[0019] The utility model solves the problem of poor lubrication of the main reducer bearing of the drive axle. By relying on a special oil collecting pool and oil delivery channel arrangement, the utility model achieves the effect of automatic and full lubrication of the reducer bearing without adding an oil pump, which is beneficial to ensuring the service life of the main reducer, thereby increasing the service life of the drive axle and the whole vehicle, improving the transmission efficiency and bearing life, and reducing the axle failure rate on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0021] In the attached picture:

[0022] Figure 1 The overall structure diagram of the main reducer;

[0023] Figure 2 for Figure 1 AA section view;

[0024] Figure 3 is a cross-sectional view of the first oil passage;

[0025] Figure 4 It is a structural diagram of the oil collection structure;

[0026] Figure 5 This is a partial enlarged view of the main reducer.

[0027] Figure symbols: main reducer housing 1, bearing 2, oil collecting structure 3, first oil pool 3-1, second oil pool 3-2, diversion structure 4, oil diameter 5, first oil channel 5-1, second oil channel 5-2, oil channel I5a, oil channel II5b, internal rolling elements 6, gears 7, auxiliary oil storage tank 8.

[0028] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1 , Figure 2 As shown, a forced lubrication structure for a main reducer bearing comprises an oil collecting structure 3 and an oil path 5 opened in a main reducer housing 1; the oil collecting structure 3 is arranged at a position on the inner wall of the main reducer housing 1 adjacent to the gear 7, and is used to collect the gear oil splashed and thrown off by the gear 7 onto the inner wall of the main reducer housing 1; one end of the oil path 5 is connected to the oil collecting structure 3, and the other end is connected to the lubrication point required by the bearing 2, and the gear oil in the oil collecting structure 3 flows to the lubrication point required by the bearing 2 through the oil path 5.

[0033] The utility model aims to solve the problem of poor lubrication of the bearings in the main reducer on the vehicle drive axle during operation (when the drive axle receives the power input of the power output device, the power is transmitted to the main reducer, and the bearings thereon are prone to poor lubrication. In the case of insufficient bearing lubricating oil, the bearings will wear or wear faster, causing abnormal noise and vibration, resulting in reduced reliability of the drive axle, and even worse, causing failure of the entire vehicle). By relying on the oil collection structure and the oil path arrangement, the main reducer bearings can be automatically and fully lubricated without adding an oil pump, thereby ensuring the service life of the main reducer and thus increasing the service life of the drive axle and the entire vehicle.

[0034] The above-mentioned oil collection structure is further described below.

[0035] like Figure 4 , Figure 5 As shown, an oil storage tank protruding toward the gear 7 and with an opening facing upward is provided on the inner wall of the main reducer housing 1 , and the oil storage tank serves as an oil collection structure 3 .

[0036] Further solutions: Figure 2 , Figure 4 , Figure 5 As shown, the diversion structure 4 provided in the oil storage tank divides the oil storage tank into a first oil pool 3-1 and a second oil pool 3-2; the oil path 5 includes a first oil channel 5-1 and a second oil channel 5-2; the first oil pool 3-1 is connected to a bearing lubrication point located on the outside of the gear 7 and mounted on the gear shaft through the first oil channel 5-1; the second oil pool 3-2 is connected to a bearing lubrication point located on the inside of the gear 7 and mounted on the gear shaft through the second oil channel 5-2.

[0037] Preferred solution: Figure 2 , Figure 4 , Figure 5 As shown, a protrusion is provided in the oil storage tank, which extends upward from the bottom surface of the oil storage tank and is connected to the two side surfaces of the oil storage tank during the extension process. The protrusion is used as a diversion structure 4; the oil storage amount of the first oil pool 3-1 and the second oil pool 3-2 is adjusted by arranging the protrusion at different positions of the oil storage tank.

[0038] Further solutions: Figure 2 As shown, an auxiliary oil storage tank 8 is provided on the inner wall of the main reducer housing 1, protruding toward another group of gear shaft pairs and opening upward, and the auxiliary oil storage tank 8 is connected with the second oil channel 5-2 through the third oil channel.

[0039] Preferred solution: Figure 3 As shown, the first oil passage 5-1 is composed of an axial oil passage I5a and a radial oil passage II5b which are connected to each other; the oil passage I5a is connected to the first oil pool 5-1, and the oil passage II5b is connected to the bearing lubrication point.

[0040] Preferred solution: Figure 2 As shown, a symmetrically arranged oil collecting structure 3 is respectively provided on the inner wall of the main reducer housing 1 on both sides of the gear 7.

[0041] Preferred solution: Figure 2 As shown, the lubrication point required by the bearing 2 is the lubrication oil channel of the outer ring of the bearing, and the lubrication oil channel is connected to the rolling elements inside the bearing through the radial lubrication oil hole of the bearing.

[0042] After the vehicle starts running, the power is transmitted to the main reducer on the drive axle body through the engine, gearbox and universal joint. The gear 7 in the main reducer rotates under the action of the power input. Under the action of the rotation of the gear 7, the gear 7 brings the oil stored in the main reducer oil pan to the upper end, and the gear oil splashes or falls onto the inner wall of the main reducer housing 1. The oil collecting structure 3 arranged on the inner wall of the main reducer housing 1 collects the oil and collects the gear oil splashed and dropped by the gear 7 onto the inner wall of the main reducer housing 1. When the oil flows back along the housing wall, the oil is collected into the first oil pool 3-1 and the second oil pool 3-2. The gear oil collected in the first oil pool 3-1 and the second oil pool 3-2 provides a prerequisite for the lubrication of the bearing 2.

[0043] Secondly, when the oil in the first oil pool 3-1 and the second oil pool 3-2 reaches a certain height, that is, when the oil volume is sufficient, it will pass through the diversion structure 4 and be distributed in proportion (the proportion can be adjusted by designing the position of the protrusion) to the oil path 5 on the main reducer housing 1 that has been machined. The oil path 5 is divided into the first oil channel 5-1 (which is further divided into oil channel I5a and oil channel II5b) and the second oil channel 5-2. The oil flows through the first oil channel 5-1 to the required lubrication point of the bearing 2 on one side, and the oil flows through the second oil channel 5-2 to the required lubrication point of the bearing on the other side. The required lubrication point of the bearing 2 is such as the lubrication oil channel of the outer ring of the bearing, and then flows through the radial lubrication oil hole of the bearing to the inside of the bearing 2 to lubricate the internal rolling element 6 of the bearing 2. After the internal rolling element 6 is lubricated and the lubricating oil film is formed, the lubricating oil flows out from the inner end face of the bearing 2, flows back to the rotating gear, and is then brought back to the oil pan by the gear. During the operation of the vehicle, this process is repeated to lubricate the bearing 2 uninterruptedly. The purpose is to solve the problem that in the actual power transmission process, in some cases, the bearings in the main reducer cannot be fully lubricated. When the bearings are insufficiently lubricated, the bearings will wear or wear will be accelerated, and the bearings will have abnormal noise and vibration.

[0044] In summary, the utility model solves the problem that in the actual power transmission process, especially in the case of heavy load uphill, due to the overall tilt of the vehicle, the gear oil level in the main reducer tilts, and the oil volume cannot be reached to ensure the lubrication of the bearings. The bearings in the main reducer cannot be fully lubricated. In the case of insufficient bearing lubricating oil, the bearings will wear or accelerate wear, abnormal noise and vibration will occur, resulting in reduced reliability of the drive axle, and even worse, causing the whole vehicle to fail. The utility model aims to solve the problem of poor lubrication of the main reducer bearing of the drive axle. Relying on a special oil collecting tank and oil delivery channel arrangement, the reducer bearing is automatically and fully lubricated without adding an oil pump, ensuring the service life of the main reducer, thereby increasing the service life of the drive axle and the whole vehicle, improving the transmission efficiency and bearing life, and reducing the axle failure rate on the market.

[0045] The utility model also provides a main reducer, which is equipped with the main reducer bearing forced lubrication structure.

[0046] The utility model also provides an engineering vehicle, which is equipped with the above-mentioned main reducer.

[0047] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0048] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present utility model and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by the present application.

[0049] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A forced lubrication structure for a main reducer bearing, characterized in that: include: At least one oil collection structure is arranged at a position adjacent to the gear on the inner wall of the main reducer housing, and is used to collect the gear oil splashed and thrown onto the inner wall of the main reducer housing by the gear; An oil path opened in the main reducer housing has one end connected to the oil collection structure and the other end connected to the lubrication point required by the bearing. The gear oil in the oil collection structure flows to the lubrication point required by the bearing through the oil path.

2. A forced lubrication structure for a main reducer bearing according to claim 1, characterized in that: An oil storage tank is provided on the inner wall of the main reducer housing, which protrudes toward the gear and opens upward, and the oil storage tank is used as an oil collection structure.

3. A forced lubrication structure for main reducer bearing according to claim 2, characterized in that: The diversion structure provided in the oil storage tank separates the oil storage tank into a first oil pool and a second oil pool; The oil path includes a first oil passage and a second oil passage; The first oil pool is connected to a bearing lubrication point located outside the gear and sleeved on the gear shaft through the first oil passage; The second oil pool is connected to a bearing lubrication point located inside the gear and sleeved on the gear shaft through the second oil passage.

4. A forced lubrication structure for a main reducer bearing according to claim 3, characterized in that: The oil storage tank is provided with a protrusion extending upward from the bottom surface of the oil storage tank and connected to the two side surfaces of the oil storage tank during the extension process, and the protrusion is used as a diversion structure; The oil storage amounts of the first oil pool and the second oil pool are adjusted by arranging protrusions at different positions of the oil storage tank.

5. The forced lubrication structure for the main reducer bearing according to claim 3, characterized in that: An auxiliary oil storage tank is provided on the inner wall of the main reducer housing, which protrudes toward another gear shaft pair and opens upward. The auxiliary oil storage tank is connected with the second oil passage through a third oil passage.

6. The forced lubrication structure for the main reducer bearing according to claim 3, characterized in that: The first oil passage is composed of an axial oil passage I and a radial oil passage II which are interconnected; The oil passage I is connected to the first oil pool, and the oil passage II is connected to the bearing lubrication point.

7. The forced lubrication structure for the main reducer bearing according to claim 1, characterized in that: A symmetrically arranged oil collection structure is respectively provided on the inner wall of the main reducer housing on both sides of the gear.

8. The forced lubrication structure for the main reducer bearing according to claim 1, characterized in that: The lubrication point required by the bearing is the lubrication oil channel of the outer ring of the bearing, and the lubrication oil channel is connected with the rolling body inside the bearing through the radial lubrication oil hole of the bearing.

9. A main reducer, characterized in that: A main reducer bearing forced lubrication structure as claimed in any one of claims 1 to 8 is installed.

10. An engineering vehicle, characterized in that: The main reducer according to claim 9 is installed.

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