Plate spring damping system with built-in circulating oil path based on crankshaft transmission

Abstract

The utility model discloses a crankshaft transmission-based plate spring damping system with a built-in circulating oil way, which relates to a transmission system and comprises a crankshaft, a belt pulley shaft and a plate spring damper, the belt pulley shaft is mounted at the end of the crankshaft, the plate spring damper is mounted on the belt pulley shaft, and a main lubricating oil way is formed in the crankshaft. A lubricating oil channel branch communicated with the main lubricating oil channel is arranged at the end of the crankshaft, a lubricating oil flowing channel communicated with the lubricating oil channel branch is formed in the belt wheel shaft, and the lubricating oil flowing channel is communicated with an inner oil cavity of the plate spring shock absorber. An oil return channel communicated with the internal oil cavity is further formed in the belt pulley shaft, an external flow channel is arranged at the joint of the belt pulley shaft and the crankshaft, the external flow channel is located in the crankcase, and the oil return channel is communicated with the external flow channel. According to the plate spring shock absorber, return oil directly returns to the interior of the crankcase through the crankshaft, an additional oil collecting tray device is not needed, the failure rate of a sealing position is reduced, and the reliability of the plate spring shock absorber is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a transmission system more specifically, it relates to a built-in circulating oil circuit's leaf spring damping system based on crankshaft transmission. BACKGROUND

[0002] In order to reduce the vibration produced when the crankshaft runs, often install leaf spring damper on the crankshaft, to absorb the vibration energy produced when transmission, to achieve the purpose of shock absorption. Because need to supply oil, leaf spring damper is usually installed in the crankcase, but if it is installed outside the crankcase, the collection oil leakage device, namely the oil collecting disc, needs to be considered. The oil collecting disc is used to collect the lubricating oil circulating inside the leaf spring damper during use. When the crankshaft vibrates due to running, the oil will flow between the internal oil cavity of the leaf spring damper and the oil collecting disc. The friction between the oil and the cavity wall and the internal friction between the oil molecules will form a damping force, further attenuating the vibration energy. However, since the oil collecting disc is also installed outside the crankshaft and rotates at high speed with the crankshaft, the high-speed operation of the oil collecting disc will cause the oil in the oil collecting disc to be under a large stress, affecting its sealing performance and causing leakage and other faults. SUMMARY

[0003] The utility model solves the technical problem in the prior art and provides a leaf spring damping system with a built-in circulating oil circuit based on crankshaft transmission. The system does not require an additional oil collecting disc device, has a simple mechanism, and reduces the failure rate of the sealing position.

[0004] The leaf spring damping system with a built-in circulating oil circuit based on crankshaft transmission comprises a crankshaft, a pulley shaft, and a leaf spring damper. The pulley shaft is installed at the end of the crankshaft, and the leaf spring damper is installed on the pulley shaft. A main lubricating oil channel is formed in the crankshaft. A lubricating oil channel branch that is in communication with the main lubricating oil channel is formed at the end of the crankshaft. A lubricating oil overflow channel that is in communication with the lubricating oil channel branch is formed in the pulley shaft. The lubricating oil overflow channel is in communication with the internal oil cavity of the leaf spring damper. An oil return channel that is in communication with the internal oil cavity is also formed in the pulley shaft. An external flow channel is arranged at the connection between the pulley shaft and the crankshaft. The external flow channel is located in the crankcase, and the oil return channel is in communication with the external flow channel.

[0005] Preferably, a first flow gap is arranged between the crankshaft and the pulley shaft, and the lubricating oil channel branch and the lubricating oil overflow channel are both in communication with the first flow gap.

[0006] Preferably, a closing plate is installed at the end of the pulley shaft, a second flow gap is arranged between the closing plate and the end face of the pulley shaft, and the second flow gap is in communication with the first flow gap.

[0007] Preferably, the pulley shaft is provided with a plurality of lubricating oil flow channels evenly along the circumference thereof.

[0008] Preferably, the pulley shaft is provided with a plurality of protruding blocks evenly arranged on the side wall thereof, and the protruding blocks extend into the internal oil cavity of the leaf spring damper.

[0009] Preferably, a lubricating oil flow channel is arranged between two adjacent protruding blocks.

[0010] Preferably, the oil return channel is composed of a first channel and a second channel, the first channel is connected with the internal oil cavity and extends obliquely into the pulley shaft, and the second channel is connected with the external flow channel and is arranged in parallel with the shaft center of the pulley shaft.

[0011] Advantages

[0012] The present application has the following advantages:

[0013] 1. The internal oil cavity is supplied with oil through the main lubricating oil channel in the crankshaft and the lubricating oil flow channel in the pulley shaft, so that the amount of oil in the internal oil cavity is ensured, the oil return of the leaf spring damper directly returns to the crankcase through the crankshaft, no additional oil collecting disc device is needed, the mechanism is simple, the failure rate of the sealing position is reduced, and the reliability of the leaf spring damper is improved.

[0014] 2. The first flow gap arranged between the crankshaft and the pulley shaft not only reserves a certain amount of oil, but also the flowing oil contacts the wall surface of the first flow gap, so that it can form greater damping to the flowing oil, thereby better absorbing the vibration capacity and improving the damping effect.

[0015] 3. The design of the two flow gaps makes the main lubricating oil channel indirectly and directly supply oil to the flow gap, effectively improving the response speed of oil supply or return. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic view of the mounting structure of the crankshaft transmission system of the present application;

[0017] Figure 2 It is a side view schematic view of the mounting structure of the crankshaft transmission system of the present application;

[0018] Figure 3 It is a front view schematic view of the mounting structure of the crankshaft transmission system of the present application;

[0019] Figure 4 It is Figure 3 It is a sectional structure schematic view of A-A;

[0020] Figure 5 It isFigure 4 Enlarged structural schematic view at C;

[0021] Figure 6 Figure 3 Sectional structural schematic view at D-D

[0022] Figure 7 Schematic view of the installation structure of the crankshaft, pulley shaft and pulley of the utility model.

[0023] Wherein: 1-crankcase mounting seat, 2-crankcase, 3-pulley, 4-crankshaft, 5-pulley shaft, 6-leaf spring shock absorber, 7-main lubricating oil passage, 8-lubricating oil passage branch, 9-first flow gap, 10-lubricating oil overflow passage, 11-internal oil cavity, 12-closed plate, 13-second flow gap, 14-protruding block, 15-oil return passage, 16-external flow passage, 17-first passage, 18-second passage. DETAILED DESCRIPTION

[0024] The utility model will be further described below in combination with examples, but does not constitute any limitation to the utility model, and the limited number of modifications made by anyone within the scope of the claims of the utility model is still within the scope of the claims of the utility model.

[0025] Referring to Figures 1-7 The utility model discloses a built-in circulating oil circuit's leaf spring damping system based on crankshaft drive, including crankshaft 4, pulley shaft 5 and leaf spring shock absorber 6. Wherein, pulley shaft 5 is installed at the end of crankshaft 4, and leaf spring shock absorber 6 is installed on pulley shaft 5, and the main lubricating oil passage 7 is set up in crankshaft 4, and through the leaf spring shock absorber 6 installed on pulley shaft 5, the vibration energy generated when the crankshaft 4 drives is absorbed, so as to achieve the purpose of damping. To solve the problem that leakage and other faults easily occur due to the high-speed rotation of the oil collecting disc, the utility model sets up the lubricating oil passage branch 8 in the end of the crankshaft 4, which is communicated with the main lubricating oil passage 7, and the lubricating oil overflow passage 10 is set up in the pulley shaft 5, which is communicated with the lubricating oil passage branch 8, and the lubricating oil overflow passage 10 is communicated with the internal oil cavity 11 of the leaf spring shock absorber 6. That is, the internal oil cavity 11 is supplied with oil through the main lubricating oil passage 7 in the crankshaft 4 and the lubricating oil overflow passage 10 in the pulley shaft 5, so as to ensure the amount of oil in the internal oil cavity 11, so that the oil return of the leaf spring shock absorber 6 directly returns to the inside of the crankcase through the crankshaft 4, without the need for an additional oil collecting disc device, the mechanism is simple, the failure rate of the sealing position is reduced, and the reliability of the leaf spring shock absorber is improved. The oil return passage 15, which is communicated with the internal oil cavity 11, is also set up in the pulley shaft 5, and the external flow passage 16 is arranged at the connection between the pulley shaft 5 and the crankshaft 4, the external flow passage 16 is located in the crankcase 2, and the oil return passage 15 is communicated with the external flow passage 16. Thus, the oil in the internal oil cavity 11 is discharged, and an oil circuit circulation is formed.

[0026] When the leaf spring damper 6 absorbs vibration energy, the oil inside it will flow in the cavity. In order to better adapt to the flowability of the oil, the first flow gap 9 is arranged between the crankshaft 4 and the pulley shaft 5 in the embodiment, and the lubricating oil passage branch 8 and the lubricating oil overflow passage 10 are connected with the first flow gap 9. The first flow gap 9 can not only store a certain amount of oil, but also the contact of the flowing oil with the wall surface of the first flow gap 9 can make it form greater damping to the flowing oil, so as to better absorb vibration capacity and improve the damping effect. In addition, the pulley shaft 5 of the embodiment is uniformly provided with a plurality of lubricating oil overflow passages 10 along the circumference thereof, and through the design of the first flow gap 9, the uniform oil supply to each lubricating oil overflow passage 10 can be realized, thereby improving the consistency of oil supply to each position in the internal oil cavity 11.

[0027] The end of the pulley shaft 5 is provided with a closing plate 12, and the second flow gap 13 is arranged between the closing plate 12 and the end surface of the pulley shaft 5, which is connected with the first flow gap 9, thereby improving the oil storage amount between the lubricating oil passage branch 8 and the lubricating oil overflow passage 10. In addition, the second flow gap 13 is also connected with the main lubricating oil passage 7, that is, the main lubricating oil passage 7 can not only supply oil to the flow gap through the lubricating oil passage branch 8, but also directly supply oil to the flow gap, thereby effectively improving the response speed of oil supply or oil return.

[0028] Preferably, a plurality of protruding blocks 14 are arranged on the side wall of the pulley shaft 5, and the protruding blocks 14 extend into the internal oil cavity 11 of the leaf spring damper 6. A lubricating oil overflow passage 10 is arranged between two adjacent protruding blocks 14. Through the design of the protruding blocks 14, the circumferential flow of the oil in the internal oil cavity 11 can be blocked to some extent, thereby ensuring the consistency of the oil flow amount in each lubricating oil overflow passage 10. Due to the consistency of the oil flow amount in each lubricating oil overflow passage 10, the stress of each part of the leaf spring damper 6 in the circumferential direction is consistent, thereby improving the stability of the leaf spring damper 6.

[0029] The oil return channel 15 is composed of a first channel 17 and a second channel 18. The first channel 17 is connected with the internal oil cavity 11 and extends obliquely into the pulley shaft 5, and the second channel 18 is connected with the external flow channel 16 and is arranged in parallel with the axis of the pulley shaft 5. Both channels are straight channels, which are mainly designed for convenient processing and can also ensure the strength of the pulley shaft 5.

[0030] The working principle of the utility model is: when the engine runs, the vibration produced when the crankshaft 4 rotates is transmitted to the leaf spring damper 6 through the belt pulley shaft 5, in the process of absorbing vibration energy by the leaf spring damper 6, the oil in the crankcase 2 flows into the internal oil cavity 11 of the leaf spring damper 6 through the main lubricating oil passage 7, lubricating oil passage branch 8 and second flow gap 13, first flow gap 9, lubricating oil overflow passage 10, and the oil in the internal oil cavity 11 flows back to the crankcase 2 through the oil return channel 15 and external flow channel 16. The leaf spring damper 6 makes the friction between the oil and the cavity wall and the friction between the oil molecules form damping force through the flow of the internal oil, thereby absorbing vibration energy.

[0031] The above is only the preferred embodiment of the utility model, it should be pointed out that for the person skilled in the art, without departing from the structure of the utility model, still can make a number of deformation and improvement, these will not influence the effect and the practicality of the patent of the utility model implementation.

Claims

1. A leaf spring damping system with a built-in circulating oil circuit based on crankshaft transmission, comprising a crankshaft (4), a pulley shaft (5), and a leaf spring damper (6), wherein the pulley shaft (5) is mounted on the end of the crankshaft (4), the leaf spring damper (6) is mounted on the pulley shaft (5), and a main lubrication oil passage (7) is provided in the crankshaft (4), characterized in that, The crankshaft (4) has a branch lubricating oil passage (8) at its end that is connected to the main lubricating oil passage (7). The pulley shaft (5) has a lubricating oil passage (10) that is connected to the branch lubricating oil passage (8). The lubricating oil passage (10) is connected to the internal oil chamber (11) of the leaf spring damper (6). The pulley shaft (5) also has a return oil passage (15) that is connected to the internal oil chamber (11). The connection between the pulley shaft (5) and the crankshaft (4) has an external flow passage (16). The external flow passage (16) is located in the crankcase (2), and the return oil passage (15) is connected to the external flow passage (16).

2. The leaf spring damping system with built-in circulating oil circuit based on crankshaft transmission according to claim 1, characterized in that, A first flow gap (9) is provided between the crankshaft (4) and the pulley shaft (5), and the lubricating oil passage branch (8) and the lubricating oil passage (10) are both connected to the first flow gap (9).

3. The leaf spring damping system with built-in circulating oil circuit based on crankshaft transmission according to claim 2, characterized in that, A sealing plate (12) is installed at the end of the pulley shaft (5). A second flow gap (13) is provided between the sealing plate (12) and the end face of the pulley shaft (5). The second flow gap (13) is connected to the first flow gap (9).

4. The leaf spring damping system with built-in circulating oil circuit based on crankshaft transmission according to claim 1, characterized in that, The pulley shaft (5) of the crankshaft transmission system is provided with multiple lubricating oil passages (10) evenly distributed along its circumference.

5. A leaf spring damping system with a built-in circulating oil circuit based on crankshaft transmission according to claim 4, characterized in that, The side wall of the pulley shaft (5) is provided with a plurality of evenly arranged protrusions (14), and the protrusions (14) extend into the internal oil cavity (11) of the leaf spring damper (6).

6. A leaf spring damping system with a built-in circulating oil circuit based on crankshaft transmission according to claim 5, characterized in that, A lubricating oil passage (10) is provided between the two connected protrusions (14).

7. A leaf spring damping system with a built-in circulating oil circuit based on crankshaft transmission according to claim 1, characterized in that, The return oil channel (15) is composed of a first channel (17) and a second channel (18). The first channel (17) is connected to the internal oil cavity (11) and extends obliquely into the pulley shaft (5). The second channel (18) is connected to the external flow channel (16) and is arranged parallel to the axis of the pulley shaft (5).

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