WO2024027441A1

WO2024027441A1 - Engine bearing lubricating structure

Info

Publication number: WO2024027441A1
Application number: PCT/CN2023/105621
Authority: WO
Inventors: 吴萍辉; 张林江; 陈明明; 杨通照; 郑林
Original assignee: 浙江钱江摩托股份有限公司
Priority date: 2022-08-02
Filing date: 2023-07-04
Publication date: 2024-02-08
Also published as: CN115234638A; CN115234638B

Abstract

An engine bearing lubricating structure, relating to the technical field of bearing lubricating. The problem that existing bearing lubricating structures have a poor lubricating effect is solved. The engine comprises a case body (1); a bearing hole base (3) used for mounting a bearing (2) is provided in the wall of the case body (1); the lubricating structure comprises an oil storage cavity (4) and an oil guide hole (5) which are located in the wall of the case body (1); the oil storage cavity (4) is provided with an opening (41) for oil drops to enter, the bottom of the opening (41) in the vertical direction is blocked by means of an oil stopper block (6); one end of the oil guide hole (5) is communicated with the oil storage cavity (4), and the other end of the oil guide hole is communicated with a bearing cavity (31) defined by the bearing hole base (3).

Description

An engine bearing lubrication structure

Technical field

The invention belongs to the technical field of bearing lubrication and relates to an engine bearing lubrication structure.

Background technique

Bearing lubrication methods include forced lubrication and non-forced lubrication. The forced lubrication method requires an oil channel in the box. The oil enters the oil channel in the box through the oil pump. The oil in the oil channel then enters the bearing mounting hole in the box. To lubricate the bearings, the non-forced lubrication method uses the oil splashed and accumulated on the inner wall of the box to flow into the bearings to lubricate the bearings.

Existing bearing non-forced lubrication structures, for example, Chinese patent documents disclose a bearing lubrication structure at the end of the engine gear shaft [Application No.: CN200710093001.5; Publication No.: CN101158300A]. The inner end of the bearing outer ring used to install the gear shaft is provided with Radial oil groove. The bearing hole seat used to install the bearing on the inner wall of the engine box is provided with a radial groove connected with the radial oil groove on the bearing. There are two reinforcing ribs on the inner wall of the engine box that surround the bearing hole seat to collect splash. The wall cavity of the oil droplets, and the radial groove on the bearing hole seat is connected to the lowest point in the wall cavity.

In the above lubrication structure, a radial oil groove needs to be opened at the inner end of the bearing outer ring, that is, the structure of the bearing needs to be changed; at the same time, in the above lubrication structure, the radial groove is located on the inner end face of the bearing hole seat, and the oil in the wall cavity passes through When the radial groove is installed, it will flow directly back to the oil storage position of the box through the notch of the radial groove. There is a problem of leakage of oil in the wall cavity. This part of the oil does not lubricate the bearing. The amount of oil flowing to the bearing becomes smaller, so that the bearing does not receive enough lubricating oil for lubrication, resulting in poor lubrication effect of the bearing.

Contents of the invention

The purpose of the present invention is to propose an engine bearing lubrication structure in view of the above-mentioned problems existing in the prior art. The technical problem solved is how to improve the lubrication effect of the bearing.

The object of the present invention can be achieved through the following technical solutions: an engine bearing lubrication structure. The engine includes a box body, and the box wall has a bearing hole seat for installing the bearing. It is characterized in that the lubrication structure includes a There is an oil storage chamber and an oil guide hole in the wall of the box. The oil storage chamber has an opening for oil droplets to enter. The bottom of the opening in the vertical direction is blocked by an oil block. One end of the oil guide hole is connected to The oil storage cavity is connected, and the other end of the oil guide hole is connected with the bearing cavity surrounded by the bearing hole seat.

The oil droplets splashing inside the box enter the oil storage chamber through the opening, and the oil blocking block blocks the bottom of the oil storage chamber opening to prevent the oil droplets entering the oil storage chamber from leaking, ensuring that all oil droplets entering the oil storage chamber are not leaked. The oil droplets flow to the bearing cavity through the oil guide hole, ensuring that there is enough lubricating oil to lubricate the bearing, improving the lubrication effect of the bearing, and preventing the bearing from being damaged. The oil blocking block is set independently, which makes it easy to withdraw the mold when the box is processed. At the same time, this lubrication structure does not need to specially set up a lubricating oil channel for the bearing, making this lubrication structure simple.

In the above engine bearing lubrication structure, a rotatable bevel gear is provided in the housing. The bevel gear is located directly below the opening of the oil storage chamber in the vertical direction. The center line of the bevel gear is in contact with the oil storage chamber. The opening of the oil chamber is oriented vertically, and the oil droplets whipped by the rotation of the bevel gear can enter the oil storage chamber through the opening. The rotation of the bevel gear will drive the lubricating oil. Under the action of centrifugal force, the bevel gear can throw the lubricating oil out along the tangential direction to form oil droplets. The oil droplets can be thrown into the oil storage chamber through the opening. The oil droplets in the oil storage chamber pass through the guide The flow hole flows to the bearing cavity to ensure the lubrication effect of the bearing.

In the above engine bearing lubrication structure, the oil blocking block includes an integrated embedded part and an oil blocking part. The top of the oil blocking part is located above the embedded part in the vertical direction. The embedded part is embedded and The seal is fixed at the bottom of the oil storage chamber, and the oil retaining portion is in sealing fit with the cavity wall of the oil storage chamber at the bottom of the opening along the vertical direction. This structure increases the sealing area of the oil block and ensures that oil droplets entering the oil storage chamber are not exposed. The top of the oil blocking part is located vertically above the embedded part to ensure that the oil blocking block can block oil droplets in the oil storage cavity, so that oil droplets entering the oil storage cavity can only enter the bearing cavity through the oil guide hole. , improve the lubrication effect of bearings.

In the above engine bearing lubrication structure, the opening is provided along the edge outside the bearing hole seat, and the length L1 of the oil retaining portion along the opening direction is 1/4-1/2 of the opening length L0. This structure makes the oil storage chamber closer to the bearing, makes the lubrication structure compact, reduces the space occupied by the lubrication structure, and allows the oil retaining part to block the oil droplets in the oil storage chamber from leaking out, and does not hinder the oil droplets. into the oil storage chamber.

In the above-mentioned engine bearing lubrication structure, the wall of the oil storage chamber has a protruding limit block, the oil retaining portion abuts against the limit block, and the embedded portion extends vertically along the The vertical direction is located below the limit block. The setting of the limit block plays a blocking role to prevent the oil block from entering into the oil storage chamber without blocking the bottom of the opening, so that the oil block is installed in place and ensures that the oil block part of the oil block is located in the opening. The bottom is used to block oil so that oil droplets in the oil storage chamber are not exposed and improve the lubrication effect of the bearing.

In the above engine bearing lubrication structure, the box includes a first housing and a second housing, the oil storage chamber is located in the first housing, and the second housing is close to the first housing. There is a protruding pressing block at the edge. When the first housing and the second housing are attached and connected by fasteners, the pressing block is pressed against the oil retaining block. The compression block plays a compressing role to prevent the oil block from falling out of the oil storage chamber, allowing the oil block to be installed in place so that oil droplets in the oil storage chamber are not exposed, thereby improving the lubrication effect of the bearing.

In the above engine bearing lubrication structure, the bearing cavity has a recessed transition cavity in the middle of the bottom of the cavity for the bearing to abut, and the oil guide hole is connected with the transition cavity. This structure allows oil droplets in the oil storage chamber to enter the transition chamber through the oil guide hole. The transition chamber also has the function of storing lubricating oil. The transition chamber is set up so that all oil droplets need to pass through the bearing before returning to the box. The oil storage position ensures that all oil droplets in the oil storage chamber lubricate the bearings and improve the lubrication effect of the lubrication structure.

In the above engine bearing lubrication structure, the cross section of the transition chamber along the radial direction of the bearing hole seat is circular, and the inner diameter of the transition chamber is smaller than or equal to the inner ring of the bearing. inner diameter. The setting of the transition cavity will not reduce the axial contact area of the bearing and will not reduce the stability of the bearing.

In the above engine bearing lubrication structure, the lubrication structure also includes a recessed wall cavity in the box and several recessed oil grooves on the outer end surface of the bearing hole seat. The wall cavity surrounds The outer edge of the bearing hole seat is arranged, and the two ends of the oil passage pass through the inner circumferential surface and the outer circumferential surface of the bearing hole seat respectively. The outer end face of the bearing hole seat refers to the end face on the bearing hole seat that faces the same direction as the opening; the outer edge of the bearing hole seat refers to the outer edge at the outer end face of the bearing hole seat. When the thrown-up oil droplets are located at the outer edge of the bearing hole seat, they can enter the bearing cavity through the wall cavity and the oil passage groove. The wall cavity and the oil passage groove play a further lubrication role, so that the oil droplets located at the outer edge of the bearing hole seat can The oil droplets flow to the bearings as much as possible to improve the lubrication effect of the bearings.

In the above engine bearing lubrication structure, the lubrication structure also includes an oil injection hole penetrating the box body, the inner end of the oil injection hole is connected with the oil storage chamber, and the outer end of the oil injection hole penetrates the box body, The outer end of the oil injection hole is detachably blocked by a plug, and the central axis of the oil injection hole coincides with the central axis of the oil guide hole. When necessary, lubricating oil can be injected inward through the oil filling hole to ensure that there is enough lubricating oil in the oil storage chamber and the transition chamber to ensure the lubrication effect of the bearing; at the same time, the setting of the oil filling hole makes it easy to process the oil guide hole.

Compared with the existing technology, the engine bearing lubrication structure provided by the present invention has the following advantages:

1. This lubrication structure prevents the oil droplets thrown into the oil storage chamber from leaking by setting up oil blocking blocks, ensuring that enough oil droplets flow to the bearing chamber through the oil guide hole, which lubricates the bearing and improves the bearing's performance. Lubricating effect so that the bearings will not be damaged.

2. The arrangement of the oil block in this lubrication structure makes it easy to remove the mold during box processing. At the same time, this lubrication structure does not need to specially set up a lubricating oil channel for the bearing, making this lubrication structure simple. In addition, there is no need to open oil holes in the bearing to ensure the structural integrity of the bearing.

Description of the drawings

Figure 1 is a diagram of the engine bearing lubrication structure in use.

Figure 2 is a schematic diagram of the overall structure of the bearing lubrication structure.

Figure 3 is a schematic diagram of the overall structure of the bearing lubrication structure without an oil block.

Figure 4 is a schematic diagram of the overall structure of the oil blocking block of the bearing lubrication structure.

Figure 5 is an exploded view of the engine case.

FIG. 6 is an enlarged front view of the display area shown in FIG. 1 .

FIG. 7 is a cross-sectional view along the line A-A in FIG. 6 .

FIG. 8 is a partial cross-sectional view along the B-B direction in FIG. 6 .

FIG. 9 is a front view of FIG. 2 .

In the figure, 1. Box; 101. First shell; 102. Second shell; 2. Bearing; 3. Bearing hole seat; 31. Bearing cavity; 4. Oil storage cavity; 41. Opening; 5. Guide Oil hole; 6. Oil block; 61. Embedded part; 62. Oil block; 7. Limiting block; 8. Pressing block; 9. Transition cavity; 10. Wall cavity; 11. Oil groove; 12. Oil filling Hole; 13. Plug; 14. Bevel gear.

Detailed ways

The following are specific embodiments of the present invention combined with the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in Figures 1 and 2, the engine includes a box 1. The wall of the box 1 has a bearing hole seat 3 for installing the bearing 2. The lubrication structure includes an oil storage chamber 4 and an oil guide hole located in the wall of the box 1. 5. The wall cavity 10 is recessed in the box 1, the oil groove 11 is recessed on the outer end surface of the bearing hole seat 3, and the oil filling hole 12 runs through the box 1.

As shown in Figures 1, 6, 7 and 8, a rotatable bevel gear 14 is provided in the box 1. The bevel gear 14 is located directly below the opening 41 of the oil storage chamber 4 in the vertical direction. The oil storage chamber 4 There is an opening 41 for splashed oil droplets to enter. The center line of the bevel gear 14 is perpendicular to the direction of the opening 41 of the oil storage chamber 4. The oil droplets whipped by the rotation of the bevel gear 14 can enter the oil storage chamber 4 through the opening 41. One end of the oil guide hole 5 is connected to the bottom of the oil storage chamber 4 , and the other end of the oil guide hole 5 is connected to the bearing cavity 31 surrounded by the bearing hole seat 3 . store The opening 41 of the oil chamber 4 is provided along the outer edge of the bearing hole seat 3, and the bottom of the opening 41 in the vertical direction is blocked by the oil block 6. Specifically, as shown in Figures 4, 7 and 8, the oil blocking block 6 includes an integrated embedded part 61 and an oil blocking part 62. The top of the oil blocking part 62 is located above the embedded part 61 in the vertical direction. The embedded part 61 is embedded and sealed in the oil storage cavity 4 , and the oil retaining part 62 is in sealing fit with the wall of the oil storage cavity 4 at the bottom of the opening 41 in the vertical direction. In this embodiment, as shown in FIG. 9 , the length L1 of the oil retaining portion 62 along the direction of the opening 41 , the length L2 of the portion of the opening 41 that is not blocked by the oil retaining portion 62 along the direction of the opening 41 , the lengths L0 of the opening 41 , L0 =L1+L2, where the length L1 of the oil retaining portion 62 along the direction of the opening 41 is 1/3 of the length L0 of the opening 41. In actual production, the length L1 of the oil retaining portion 62 along the direction of the opening 41 can also be the length of the opening 41 1/4 or 1/2 of L0.

As shown in Figures 2, 3, 7 and 8, the wall of the oil storage chamber 4 has a protruding limiter block 7, the oil retaining portion 62 abuts against the limiter 7, and the embedded portion 61 is along the The vertical direction is located below the limiting block 7 . As shown in Figures 5, 7, 8 and 9, the box 1 includes a first housing 101 and a second housing 102. The oil storage chamber 4 is located in the first housing 101, and the second housing 102 is close to the first housing 101. There is a pressing block 8 protruding from the edge of a housing 101. When the first housing 101 and the second housing 102 are connected by fasteners such as bolts, the pressing block 8 abuts against the oil barrier. On block 6.

As shown in Figures 1, 2, 3 and 9, the wall cavity 10 is arranged around the outer edge of the bearing hole seat 3, and the two ends of the oil groove 11 penetrate the inner and outer peripheral surfaces of the bearing hole seat 3 respectively. As shown in Figure 8, the inner end of the oil filling hole 12 is connected with the oil storage chamber 4, and the outer end of the oil filling hole 12 penetrates the box 1. The outer end of the oil filling hole 12 is detachably blocked by a plug 13. The plug 13 Generally, the thread is connected in the oil filling hole 12. The central axis of the oil filling hole 12 coincides with the central axis of the oil guide hole 5 . As shown in FIGS. 2 and 8 , the bearing cavity 31 has a recessed transition cavity 9 in the middle of the bottom of the cavity for the bearing 2 to abut, and the oil guide hole 5 is connected with the transition cavity 9 . The cross section of the transition cavity 9 along the radial direction of the bearing hole seat 3 is circular. In this embodiment, the inner diameter of the transition cavity 9 is equal to the inner diameter of the inner ring of the bearing 2. In actual production, the inner diameter of the transition cavity 9 can also be smaller than the inner diameter of the bearing 2. The inner diameter of the circle.

Lubricating oil is stored at the bottom of the inner cavity of the box 1, and the bottom side of the bevel gear 14 is immersed in the lubricating oil. When working, the bevel gear 14 rotates, driving the lubricating oil and turning the lubricating oil into oil droplets. Some of the oil droplets enter the oil storage chamber 4 through the opening 41, and then part of the oil droplets flows to the bearing chamber 31 through the oil guide hole 5, and part of the oil droplets first flows into the bearing chamber 31. The flow flows to the transition chamber 9 and then to the bearing chamber 31, which lubricates the bearing 2 from the inside out. At the same time as the above process, part of the lubricating oil flows into the wall cavity 10 and then enters the bearing cavity 31 through the oil groove 11 to lubricate the bearing 2 from the outside to the inside. The above-mentioned lubricating oil will eventually flow into the inside of the box 1 to form a cycle.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or additions to the described specific embodiments or substitute them in similar ways, but this will not deviate from the spirit of the present invention or exceed the definition of the appended claims. range.

Although this article uses the box 1, the first shell 101, the second shell 102, the bearing 2, the bearing hole seat 3, the bearing cavity 31, the oil storage cavity 4, the opening 41, the oil guide hole 5, and the oil barrier. Block 6, embedded part 61, oil retaining part 62, limiting block 7, pressing block 8, transition cavity 9, wall cavity 10, oil groove 11, oil filling hole 12, plug 13, bevel gear 14 and other terms, but they are not The possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

An engine bearing lubrication structure. The engine includes a box (1). The wall of the box (1) has a bearing hole seat (3) for installing a bearing (2). It is characterized in that the lubrication structure includes a There is an oil storage chamber (4) and an oil guide hole (5) in the wall of the box (1). The oil storage chamber (4) has an opening (41) for oil droplets to enter. The opening (41) is vertically The bottom of the direction is blocked by an oil block (6), one end of the oil guide hole (5) is connected to the oil storage chamber (4), and the other end of the oil guide hole (5) is connected to the bearing hole seat (3 ) are connected to each other.
An engine bearing lubrication structure according to claim 1, characterized in that a rotatable bevel gear (14) is provided in the box (1), and the bevel gear (14) is located in the storage tank along the vertical direction. Directly below the opening (41) of the oil chamber (4), the center line of the bevel gear (14) is perpendicular to the direction of the opening (41) of the oil storage chamber (4), and the oil rotated by the bevel gear (14) The droplets can enter the oil storage chamber (4) through the opening (41).
An engine bearing lubrication structure according to claim 1 or 2, characterized in that the oil blocking block (6) includes an integrated embedded part (61) and an oil blocking part (62), and the oil blocking part The top of (62) is located vertically above the embedded part (61). The embedded part (61) is embedded and sealed at the bottom of the oil storage chamber (4). The oil retaining part (62) is connected to the opening (62). 41) The chamber wall of the oil storage chamber (4) at the bottom in the vertical direction is sealed and fitted.
An engine bearing lubrication structure according to claim 3, characterized in that the opening (41) is provided along the edge outside the bearing hole seat (3), and the oil retaining portion (62) is along the direction of the opening (41). The length L1 is 1/4-1/2 of the length L0 of the opening (41).
An engine bearing lubrication structure according to claim 3, characterized in that the cavity wall of the oil storage chamber (4) has a protruding limit block (7), and the oil retaining portion (62) Against the limiting block (7), the embedded portion (61) is located vertically below the limiting block (7).
An engine bearing lubrication structure according to claim 1 or 2, wherein Characteristically, the box (1) includes a first shell (101) and a second shell (102), the oil storage chamber (4) is located in the first shell (101), and the second shell The body (102) has a protruding pressing block (8) at the edge close to the first housing (101). When the first housing (101) and the second housing (102) are attached to each other through fasteners, When closed and connected, the pressing block (8) is pressed against the oil retaining block (6).
An engine bearing lubrication structure according to claim 1 or 2, characterized in that the bearing cavity (31) has a recessed transition cavity (31) in the middle of the bottom of the cavity for the bearing (2) to abut. 9), the oil guide hole (5) is connected with the transition chamber (9).
An engine bearing lubrication structure according to claim 7, characterized in that the transition chamber (9) has a circular cross-section along the radial direction of the bearing hole seat (3), and the inner diameter of the transition chamber (9) is smaller than Or equal to the inner diameter of the inner ring of the bearing (2).
An engine bearing lubrication structure according to claim 1 or 2, characterized in that the lubrication structure further includes a wall cavity (10) recessed in the box (1) and the bearing hole seat (3) There are several recessed oil passage grooves (11) on the outer end face of the bearing. The wall cavity (10) is arranged around the outer edge of the bearing hole seat (3). Both ends of the oil passage groove (11) pass through the bearing hole seat respectively. (3) The inner and outer peripheral surfaces.
An engine bearing lubrication structure according to claim 1 or 2, characterized in that the lubrication structure also includes an oil filling hole (12) penetrating the box (1), and the inner end of the oil filling hole (12) Communicated with the oil storage chamber (4), the outer end of the oil injection hole (12) penetrates the box (1), and the outer end of the oil injection hole (12) is detachably blocked by a plug (13), so The central axis of the oil filling hole (12) coincides with the central axis of the oil guide hole (5).