Balanced axle frame assembly

Abstract

This application discloses a balance shaft frame assembly, solving the technical problem of difficult control of internal oil pressure in the prior art. The balance shaft frame assembly includes a main oil passage with an oil inlet; branch oil passages connected to the main oil passage, the inner diameter of the main oil passage gradually decreasing along the oil flow direction, and the inner diameter of the branch oil passages also gradually decreasing along the oil flow direction; and a transmission mechanism passing through the branch oil passages.

Description

Technical Field

[0001] This application belongs to the field of automotive component manufacturing technology, specifically relating to a balance shaft frame assembly. Background Technology

[0002] With the rapid development of the automotive industry in modern society, automotive technology research and development is advancing by leaps and bounds. People are increasingly emphasizing lightweight, comfort, and smooth handling in automobiles. The balance shaft assembly, as an important automotive component, is widely used in the automotive manufacturing field, serving guiding, buffering, and vibration damping functions.

[0003] However, in existing balance shaft frame assemblies, the hydraulic pressure is difficult to control during use, resulting in certain technical defects. While excessively high hydraulic pressure can make the drive shaft more stable during rotation, it also leads to excessive consumption of lubricating oil inside the balance shaft frame. Conversely, insufficient hydraulic pressure prevents the drive shaft from suspending during transmission, increasing friction and wear. Therefore, existing balance shaft frames suffer from the drawback of difficult hydraulic pressure control. Summary of the Invention

[0004] To address the technical problem of difficulty in controlling the internal oil pressure of current balance shaft frames, this application provides a balance shaft frame assembly, comprising: a main oil passage with an oil inlet; a branch oil passage connected to the main oil passage, the inner diameters of the main oil passage and the branch oil passage gradually decreasing along the oil flow direction; and a transmission mechanism installed at the end of the branch oil passage. Through this structure, by setting the inner diameter of the branch oil passage to gradually decrease along the oil flow direction, the oil pressure can be increased during the flow process, thereby allowing the transmission mechanism to suspend at the end of the branch oil passage for stable oil pressure control.

[0005] In some embodiments, the inner diameter of the main oil passage and the inner diameter of the branch oil passage decrease sequentially in the oil flow direction. By setting the inner diameter of the branch oil passage to be smaller and smaller, it is possible to pressurize during the oil flow process, thereby enabling the branch oil passage to generate sufficient pressure.

[0006] In some embodiments, an oil pressure test port is provided on the oil distribution channel, the oil pressure test port is located at the tail end of the oil distribution channel, and a pressure sensor is provided on the oil pressure test port for measuring the oil pressure at the oil pressure test port.

[0007] In some embodiments, a first oil storage chamber is provided at the lower end of the oil pressure test hole. The first oil storage chamber is connected to the oil pressure test port and to the oil distribution channel. The first oil storage chamber is filled with oil to transmit oil pressure to the inside of the oil pressure test hole, thereby avoiding inaccurate oil pressure testing due to insufficient oil supply in the oil channel.

[0008] In some embodiments, the wall thickness of the main oil passage and the branch oil passages is consistent throughout, thereby ensuring that the invention has sufficient strength and avoiding oil passage cracking due to uneven strength.

[0009] In some embodiments, the transmission mechanism includes a bearing bush fixedly connected to the oil distribution channel, the bearing bush and the oil distribution channel communicating to form a passage; and a transmission shaft installed inside the bearing bush and driven on the oil distribution channel.

[0010] In some embodiments, an oil storage shell is provided at the tail end of the oil distribution channel. The oil storage shell is coaxially arranged with the drive shaft and installed at the tail end of the oil distribution channel. The oil storage shell is connected to the oil distribution channel. A second oil storage cavity is formed between the bearing bush and the oil storage shell. The bearing bush has a plurality of oil outlets, which are symmetrically distributed. The number of oil outlets is at least two, with two oil outlets facing each other, one above and one below. When there are more than two oil outlets, the oil outlets are arranged in a ring array. Through the distribution of the oil outlets, the oil pressure inside the oil distribution channel can surround the drive shaft, thereby suspending the drive shaft in the air and reducing pressure and power.

[0011] In some embodiments, a gear is provided on the drive shaft, and the gear is thermally fitted to the drive shaft.

[0012] In some embodiments, the number of oil distribution channels is three, and each of the three oil distribution channels is connected to the main oil channel.

[0013] In some embodiments, the oil channel includes two cast oil channels and one machined oil channel. The two cast oil channels and the oil channel are machined together to form a first integral structure, and the machined oil channel is machined together with the first integral structure.

[0014] The beneficial effects of this invention are:

[0015] By setting the inner diameter of the oil distribution channel to gradually decrease along the flow direction of the oil circuit, the oil pressure can be increased during the flow process, thereby enabling the transmission mechanism to be suspended at the end of the oil distribution channel and achieve stable control of the oil pressure.

[0016] By setting the inner diameter of the oil channel to be smaller and smaller, it is possible to pressurize the oil flow process, thereby enabling the oil channel to generate sufficient pressure to allow the transmission mechanism to levitate. Attached Figure Description

[0017] Figure 1 A schematic diagram of the balance shaft frame assembly in one embodiment of this application is shown;

[0018] Figure 2 A schematic diagram of the oil circuit during the use of this application is shown;

[0019] Figure 3 This invention provides a schematic diagram of the balance shaft frame assembly from another perspective in one embodiment of the present application.

[0020] Figure 4 A schematic diagram of the structure of the first oil storage chamber in one embodiment of this application is shown;

[0021] Figure 5 A schematic diagram of the structure of the first oil storage chamber in one embodiment of this application is shown.

[0022] 1. Main oil passage; 2. Branch oil passage; 3. Oil pressure test port; 4. Drive shaft; 5. Drive gear; 6. Driven gear; 7. Fixed plate; 8. First oil reservoir; 9. Second oil reservoir; 10. Oil reservoir shell; 11. Oil outlet; 12. Bearing. Detailed Implementation

[0023] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] Please see Figure 1According to a first aspect of this application, a balance shaft frame assembly is provided. In this embodiment, a main oil passage 1 is provided with an oil inlet; a branch oil passage 2 is provided, which is connected to the main oil passage 1 and the branch oil passage 2, and the inner diameters of the main oil passage 1 and the branch oil passage 2 gradually decrease along the oil flow direction; and a transmission mechanism is installed at the end of the branch oil passage 2. With the above structure, a passage is formed by the main oil passage 1 and the branch oil passage 2. The transmission mechanism is installed at the end of the branch oil passage 2, so that during the rotation of the transmission mechanism, under the action of the branch oil passage 2, it can generate reduced friction and resistance, thereby reducing the noise generated. The transmission mechanism adopts a ball bearing 12 structure, which allows the transmission mechanism to be suspended in the branch oil passage 2 under the action of oil pressure. This increases the rotation speed while reducing noise. By setting the inner diameter of the branch oil passage 2 to be lower, the oil pressure is kept stable during the flow of oil, avoiding the situation where the oil pressure is unstable when in contact with the transmission shaft 4, which would prevent the transmission shaft 4 from being suspended.

[0025] Please see Figure 2 In some embodiments, the inner diameter of the main oil passage 1 and the inner diameter of the branch oil passage 2 decrease sequentially in the oil flow direction. By setting the inner diameter of the branch oil passage 2 to be smaller and smaller, it is possible to pressurize during the oil flow process, so that the branch oil passage 2 can generate sufficient pressure.

[0026] In some embodiments, an oil pressure test port 3 is provided on the oil distribution channel 2. The oil pressure test port 3 is located at the tail end of the oil distribution channel 2. A pressure sensor is provided on the oil pressure test port 3. The pressure sensor is used to measure the oil pressure at the oil pressure test port 3. When the oil pressure is too high, the pressure sensor transmits a signal to the vehicle body system. The vehicle body system adjusts the oil pressure to prevent excessive oil leakage in the oil distribution channel 2. When the oil pressure is too low, the system pressurizes the system to maintain a stable oil pressure in the oil distribution channel 2.

[0027] Please see Figure 3 , Figure 4 In some embodiments, a first oil storage chamber 8 is provided at the lower end of the oil pressure test port. The first oil storage chamber 8 is connected to the oil pressure test port 3 and the oil distribution channel 2. The first oil storage chamber 8 is double-ring shaped, so the interior of the first oil storage chamber 8 is connected. The first oil storage chamber 8 is filled with oil to transmit oil pressure to the inside of the oil pressure test port, so as to avoid the phenomenon of inaccurate oil pressure test due to insufficient oil supply in the oil channel.

[0028] In some embodiments, the wall thickness of the main oil passage 1 and the branch oil passage 2 is consistent throughout, thereby ensuring that the invention has sufficient strength and avoiding cracking of the oil passage due to uneven strength.

[0029] In some embodiments, the transmission mechanism includes: a bearing 12, which is fixedly connected to the oil distribution channel 2, and the bearing 12 and the oil distribution channel 2 communicate to form a passage; a transmission shaft 4, which is installed inside the bearing 12 and driven on the oil distribution channel 2. The bearing 12 is made of copper-based alloy. When the system is supplied with oil, the transmission shaft 4 is in a suspended state. The transmission shaft 4 is equipped with a driving gear 5 and a driven gear 6. The maximum speed is 8000 rpm, the noise of the entire system is less than 9 decibels, the clearance between the bearing 12 and the shaft is designed to be 0.015-0.03 mm, and it is in a suspended state under 2 MPa oil pressure thrust. At the same time, the system has an oil pressure monitoring function, and when the oil pressure is too high or too low, it can provide feedback to the system for pressure replenishment and pressure reduction.

[0030] Please see Figure 3 , Figure 5 In some embodiments, an oil storage shell 10 is provided at the tail end of the oil distribution channel 2. The oil storage shell 10 is coaxially arranged with the drive shaft 4 and is installed at the tail end of the oil distribution channel 2. The oil storage shell 10 is connected to the oil distribution channel 2. A second oil storage cavity 9 is formed between the bearing bush 12 and the oil storage shell 10. The bearing bush 12 has a plurality of oil outlets 11, which are symmetrically distributed. The number of oil outlets 11 is at least two, with two oil outlets 11 facing each other, one above and one below. When the number of oil outlets 11 is more than two, the oil outlets 11 are arranged in a ring array. Through the distribution of the oil outlets 11, the oil pressure inside the oil distribution channel 2 can be used to surround the drive shaft 4, thereby making the drive shaft 4 suspend in the air and reducing pressure and power.

[0031] In some embodiments, a gear is provided on the drive shaft 4, and the gear and the drive shaft 4 are thermally fitted with an interference fit of 0.04-0.08. The thermal fitting process ensures that the gear accuracy remains unchanged when no external force is applied during assembly. The gear is machined by grinding with a precision of 5h. The pressure angle and camber of the gear are independently developed and designed to ensure low noise and good wear resistance during high-speed operation.

[0032] Please see Figures 1-3 In some embodiments, the number of oil distribution channels 2 is set to three, and the three oil distribution channels 2 are respectively connected to the main oil channel 1. Using three oil distribution channels 2 can make the balance frame more stable and save the limited installation space in the vehicle. The ends of the three oil distribution channels 2 are provided with fixed plates 7, and the fixed plates 7 connect the three oil distribution channels 2 into a whole structure.

[0033] In some embodiments, the oil channel 2 includes two cast oil channels and one machined oil channel. The two cast oil channels and the oil channel 2 are machined together to form a first integral structure. The machined oil channel is machined together with the first integral structure. The casting process involves casting a metal mold and a sand core in one step. At the same time, in order to reduce manufacturing difficulty, the first integral structure and the machined oil channel are machined together.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A balance shaft frame assembly, characterized in that, include: The main oil passage (1) is provided with an oil inlet; The main oil passage (1) is connected to the branch oil passage (2). The inner diameter of the main oil passage (1) gradually decreases along the oil flow direction, and the inner diameter of the branch oil passage (2) gradually decreases along the oil flow direction. A transmission mechanism, which passes through the oil distribution channel (2). The transmission mechanism includes: The bearing (12) is fixedly connected to the oil distribution channel (2), and the bearing (12) and the oil distribution channel (2) are connected to form a passage; A drive shaft (4) is installed inside the bearing shell (12) and is driven on the oil distribution channel (2); An oil storage shell (10) is provided at the tail end of the oil distribution channel (2). The oil storage shell (10) is coaxially arranged with the drive shaft (4). The oil storage shell (10) is installed at the tail end of the oil distribution channel (2). The oil storage shell (10) is connected to the oil distribution channel (2). A second oil storage cavity (9) is formed between the bearing (12) and the oil storage shell (10). Several oil outlets (11) are provided on the bearing (12). The several oil outlets (11) are symmetrically distributed. The oil distribution channel (2) is provided with an oil pressure test port (3), which is located at the tail end of the oil distribution channel (2). A pressure sensor is provided on the oil pressure test port (3). The lower end of the oil pressure test port (3) is provided with a first oil storage chamber (8), which is connected to the oil pressure test port (3) and the first oil storage chamber (8) is connected to the oil distribution channel (2).

2. The balance shaft frame assembly according to claim 1, characterized in that, In the direction of oil flow, the inner diameter of the main oil passage (1) and the inner diameter of the branch oil passage (2) decrease sequentially.

3. The balance shaft frame assembly according to claim 1, characterized in that, The wall thickness of the main oil passage (1) and the branch oil passage (2) is consistent throughout.

4. The balance shaft frame assembly according to claim 1, characterized in that, The drive shaft (4) is provided with a gear, and the gear and the drive shaft (4) are thermally fitted together.

5. The balance shaft frame assembly according to claim 1, characterized in that, The number of the oil distribution channels (2) is set to three, and the three oil distribution channels (2) are respectively connected to the main oil channel (1).

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