Shaft tooth lubricating structure

Abstract

The utility model discloses a kind of axle gear lubrication structures, including input shaft and gear installed on input shaft, the oil hole is opened in the input shaft, and lubricating oil is sent into the raceway surface of input shaft and gear mounting cooperation by oil hole, the raceway surface of input shaft is opened with several lubricating grooves, synchronizer gear sleeve is equipped on the input shaft, and synchronizer gear sleeve fixes input shaft and gear to realize power output.The utility model cancels the needle roller bearing arranged between input shaft and gear, saves space and increases the diameter of input shaft and gear, improves the strength and stiffness of axle and carrying capacity, avoids the phenomenon that gear or input shaft appears fracture;Replace needle roller bearing in prior art by lubricating groove, not only eliminate the risk of needle failure, while reducing production cost.

Description

Technical Field

[0001] This utility model belongs to the field of lubrication technology, and specifically relates to a shaft gear lubrication structure. Background Technology

[0002] In power transmission systems (such as gearboxes and reducers), power output is achieved through gear shifting: the synchronizer's sleeve or engaging sleeve connects the shaft and gear, allowing the power transmitted by the gear to be delivered to subsequent components via the shaft. When gears are not shifted, the difference in speed between the shaft and gears can easily generate relative friction. Please refer to [link to relevant documentation]. Figure 1 To reduce frictional losses, traditional structures typically add a needle roller bearing 300 between shaft 100 and gear 200, using system oil to lubricate the needle rollers and ensure the normal operation of the transmission system. However, with increasingly stringent national emission standards, transmissions and reducers need to withstand greater input torque to meet the performance demands of power equipment. But due to limitations in overall equipment layout and size, the installation space for transmissions and reducers cannot be arbitrarily expanded, making it difficult to adjust the structural dimensions of their internal gears and shafts to adapt to the increasing torque requirements. When the dimensions of the gears and shafts cannot match the increased torque demands, the load they bear during operation will exceed their design capacity, making them prone to breakage over long-term use. This not only causes transmission and reducer failure, affecting the normal operation of power equipment, but may also pose safety hazards, becoming a pressing problem in the current power transmission field. Utility Model Content

[0003] To address the aforementioned shortcomings of existing technologies, a shaft-gear lubrication structure is provided, which solves the problem that the connection between the shaft and gear in existing technologies is prone to breakage after long-term use due to the large input torque.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A shaft gear lubrication structure includes an input shaft and a gear mounted on the input shaft. The input shaft has an oil hole, through which lubricating oil is delivered to the raceway surface where the input shaft and the gear are installed. The raceway surface of the input shaft has several lubrication grooves. The input shaft is equipped with a synchronizer sleeve, which fixes the input shaft and the gear to achieve power output.

[0006] By adopting the above structural design, several lubrication grooves are set on the raceway surface of the input shaft, which can generate an oil film at the raceway surface of the gear and the input shaft, resulting in a better lubrication effect. Therefore, the needle roller bearing set between the input shaft and the gear in the prior art can be eliminated, the diameter of the input shaft and the gear can be increased, the strength, rigidity and load-bearing capacity of the shaft are improved, and the phenomenon of gear or input shaft breakage is avoided.

[0007] Preferably, the gear includes a high-gear gear and a low-gear gear movably mounted on the input shaft, and the synchronizer sleeve is located between the high-gear gear and the low-gear gear, and the synchronizer sleeve is driven to move along the input shaft through a connected shifting structure.

[0008] Preferably, the oil hole includes a main oil hole arranged axially and a plurality of auxiliary oil holes communicating with the main oil hole, and the oil outlet end of the auxiliary oil holes is located at the raceway surface between the input shaft and the high-gear and low-gear.

[0009] Preferably, the input shaft has a boss in the middle, and the synchronizer sleeve is movably mounted on the boss.

[0010] Preferably, the high-grade gear and the low-grade gear are located on both sides of the boss, and a first retaining part and a second retaining part are respectively provided on one side of the adjacent boss of the high-grade gear and the low-grade gear. The synchronizer sleeve can be fixed on the first retaining part or the second retaining part.

[0011] Preferably, 46 lubrication grooves are evenly distributed on the raceway surface of the input shaft.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model eliminates the needle roller bearing between the input shaft and the gear, saving space by increasing the diameter of the input shaft and the gear, thereby improving the strength, rigidity, and load-bearing capacity of the shaft and preventing the gear or input shaft from breaking.

[0014] 2. This utility model replaces the needle roller bearing in the prior art by setting several lubrication grooves on the raceway surface of the input shaft, which not only eliminates the risk of needle roller failure, but also reduces production costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the existing technology;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the raceway surface of the input shaft of this utility model;

[0018] Figure 4 yes Figure 3 Enlarged view at point A.

[0019] In the picture:

[0020] Input shaft 1, boss 1a, gear 2, high-grade gear 2a, first retaining part 21a, low-grade gear 2b, second retaining part 21b, oil hole 3, main oil hole 3a, auxiliary oil hole 3b, lubrication groove 4, synchronizer sleeve 5. Detailed Implementation

[0021] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0023] Please see Figures 2 to 4 A gear lubrication structure includes an input shaft 1 and a gear 2 mounted on the input shaft 1. The input shaft 1 has an oil hole 3, through which lubricating oil is delivered to the raceway surface where the input shaft 1 and gear 2 are fitted, thereby lubricating the raceway surface. The raceway surface of the input shaft 1 has several lubrication grooves 4; in this embodiment, 46 lubrication grooves 4 are evenly distributed on the raceway surface of the input shaft 1. A synchronizer sleeve 5 is provided on the input shaft 1, and the synchronizer sleeve 5 fixes the input shaft 1 and gear 2 to achieve power output.

[0024] The specific structure is as follows:

[0025] The gear 2 includes a high-gear 2a and a low-gear 2b movably mounted on the input shaft 1, and the synchronizer sleeve 5 is located between the high-gear 2a and the low-gear 2b. The synchronizer sleeve 5 is driven to move along the input shaft 1 through a connected shifting structure. A boss 1a is provided in the middle of the input shaft 1, and the synchronizer sleeve 5 is movably mounted on the boss 1a. The high-gear 2a and the low-gear 2b are respectively located on both sides of the boss 1a. A first retaining part 21a and a second retaining part 21b are respectively provided on one side of the high-gear 2a and the low-gear 2b adjacent to the boss 1a. The synchronizer sleeve 5 can be fixed to one retaining part 21a or the second retaining part 21b.

[0026] The oil hole 3 includes a main oil hole 3a arranged axially and a plurality of auxiliary oil holes 3b communicating with the main oil hole 3a. The oil outlet end of the auxiliary oil holes 3b is located at the raceway surface between the input shaft 1 and the high-gear 2a and the low-gear 2b.

[0027] The working principle of this utility model is as follows:

[0028] When the shifting mechanism drives the input shaft 1 to shift gears, such as switching to the high-gear 2a, the synchronizer sleeve 5 moves to the side of the high-gear 2a, and the synchronizer gear 5 fixes the first retaining part 21a and the boss 1a of the input shaft 1 together. At this time, the high-gear 2a rotates with the input shaft 1 to complete the power output. The low-gear 2b rotates at a different speed than the input shaft 1. The lubricating oil entering through the main oil hole 3a in the input shaft 1 enters the raceway surface between the low-gear 2b and the input shaft 1 through the auxiliary oil hole 3b for lubrication. Furthermore, by setting the lubrication groove 4 on the raceway surface of the input shaft 1, the lubricating oil forms a barrier oil film on the raceway surface, which can improve the lubrication effect between the low-gear 2b and the input shaft 1. The same principle applies when switching to the low-gear 2b. Compared with the existing shaft gear connection structure, the structure of the lubrication groove 4 replaces the existing needle roller bearing, saving space and increasing the diameter of the input shaft 1 and gear 2, improving the strength, rigidity and load-bearing capacity of the shaft, avoiding the phenomenon of breakage of gear 2 or input shaft 1, and reducing production costs.

[0029] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A shaft gear lubrication structure, characterized in that, It includes an input shaft (1) and a gear (2) mounted on the input shaft (1). The input shaft (1) has an oil hole (3) and lubricating oil is sent to the raceway surface where the input shaft (1) and the gear (2) are installed and matched through the oil hole (3). The raceway surface of the input shaft (1) has several lubrication grooves (4). The input shaft (1) is provided with a synchronizer sleeve (5), and the synchronizer sleeve (5) fixes the input shaft (1) and the gear (2) to realize power output.

2. The shaft gear lubrication structure as described in claim 1, characterized in that, The gear (2) includes a high-gear gear (2a) and a low-gear gear (2b) movably mounted on the input shaft (1), and the synchronizer sleeve (5) is located between the high-gear gear (2a) and the low-gear gear (2b). The synchronizer sleeve (5) is driven to move along the input shaft (1) through a connected shifting structure.

3. The shaft gear lubrication structure as described in claim 2, characterized in that, The oil hole (3) includes a main oil hole (3a) arranged axially and several auxiliary oil holes (3b) communicating with the main oil hole (3a). The oil outlet of the auxiliary oil holes (3b) is located at the raceway surface between the input shaft (1) and the high-gear (2a) and the low-gear (2b).

4. The shaft gear lubrication structure as described in claim 2, characterized in that, The input shaft (1) has a boss (1a) in the middle, and the synchronizer sleeve (5) is movably mounted on the boss (1a).

5. A shaft gear lubrication structure as described in claim 4, characterized in that, The high-grade gear (2a) and the low-grade gear (2b) are located on both sides of the boss (1a). The high-grade gear (2a) and the low-grade gear (2b) are respectively provided with a first retaining part (21a) and a second retaining part (21b) on one side of the adjacent boss (1a). The synchronizer sleeve (5) can be fixed on a retaining part (21a) or a second retaining part (21b).

6. The shaft gear lubrication structure as described in claim 1, characterized in that, The input shaft (1) has 46 lubrication grooves (4) evenly distributed on its raceway surface.

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