Duplicate gear shaft

Abstract

The utility model discloses a duplicate gear shaft which comprises a main gear shaft and a movable gear shaft which can be spliced with each other, a sleeve seat is arranged at one end of the main gear shaft, a shaft inserting spline matched with the sleeve seat is arranged at one end of the movable gear shaft, and a first linkage gear and a second linkage gear are arranged on the surface of the main gear shaft and the surface of the movable gear shaft respectively. The sleeve seat is located between the first linkage gear and the second linkage gear, a plurality of oil spilling holes evenly distributed in the circumferential direction are formed in the surface of the sleeve seat, magnetic cores are detachably installed on the inner sides of the oil spilling holes, and oil channel cavities are formed in the inner side of the main gear shaft and the inner side of the movable gear shaft. According to the utility model, the main gear shaft and the movable gear shaft can be mutually spliced, and the axial sliding fit between the insertion shaft spline and the sleeve seat is utilized, so that the flexible connection of the duplicate gear shaft is realized, the assembly error caused by expansion caused by heat and contraction caused by cold can be effectively eliminated during assembly, and the transmission precision and the stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear shafts, in particular to a double gear shaft. Background Art

[0002] In the field of mechanical transmission, gear shafts are one of the most commonly used transmission components. Traditional gear shafts typically utilize a fixed, single-shaft structure, typically connecting two gear shafts via a keyway or spline shaft for transmission. However, over long-term use, due to thermal expansion and contraction, assembly errors, and wear, traditional gear shafts are prone to developing transmission backlash, resulting in reduced transmission efficiency. Furthermore, traditional gear shafts typically utilize simple oil seals and lubrication designs, which fail to effectively prevent the accumulation of internal wear debris. This not only affects lubrication effectiveness but also exacerbates gear wear, thereby shortening the life of the equipment.

[0003] Existing technical solutions present several practical challenges. First, because the gear shafts generate heat during transmission, traditional fixed connection methods cannot effectively eliminate dimensional changes caused by thermal expansion and contraction, resulting in inaccurate gear meshing and, consequently, noise and wear. Second, traditional lubrication methods fail to effectively address oil circulation, leading to uneven lubrication and increased gear wear. Furthermore, due to the lack of effective wear debris collection devices, metal debris from the transmission process easily enters the gear meshing area, further damaging the gear surface and affecting its service life and transmission efficiency.

[0004] Therefore, the existing technology needs to improve the connection method and lubrication system of the gear shaft to enhance assembly flexibility and durability while ensuring stable operation in various working environments. Utility Model Content

[0005] The utility model aims to solve the technical problems existing in the prior art or related technologies.

[0006] The utility model aims to solve the problems of clearance, insufficient lubrication and wear in the transmission connection of gear shafts in the prior art. The utility model discloses a double gear shaft structure to achieve efficient transmission connection and automatic lubrication of the gear shafts.

[0007] The utility model comprises a main gear shaft and a movable gear shaft. One end of the main gear shaft is provided with a sleeve, and one end of the movable gear shaft is provided with a spline that matches the sleeve. The surfaces of the main gear shaft and the movable gear shaft are respectively provided with a first coupling tooth and a second coupling tooth. This connection method achieves a tight connection between the two gear shafts and ensures efficient power transmission during the transmission process.

[0008] In this utility model, the sleeve is located between the first and second coupling teeth and features several oil overflow holes. Magnetic cores are removably mounted inside these overflow holes. Both the main and movable gear shafts have oil passages on their insides, with one-way valve cores threaded onto their ends to secure the passages. By installing the magnetic cores inside the sleeve, wear debris generated during gear transmission is automatically absorbed, improving the cleanliness and durability of the gear transmission.

[0009] In a preferred embodiment, the present invention can be further configured such that: the surface of the splined shaft is provided with a plurality of spline teeth, the inner side of the sleeve is provided with a matching spline tooth groove, and the axial length of the sleeve is greater than the length of the splined shaft. This design allows the main and movable pinion shafts to automatically adjust their expansion due to heat through the play within the sleeve, thereby reducing the effects of thermal expansion and contraction on transmission accuracy and further ensuring smooth gear meshing.

[0010] This utility model also features a one-way lubrication system, in which a one-way valve core seals the oil passages at the ends of the main and movable pinion shafts. These passages are filled with lubricating oil. When the gear shafts rotate, the centrifugal oil passages connect to the oil passages, forming an automatic lubrication channel. This ensures effective lubrication of the gear shafts at high speeds and prevents wear caused by dry friction.

[0011] Another advantage of the present invention is that by providing multiple oil channel cavities and centrifugal oil channels and evenly distributing them in the circumferential direction on the spline surface of the plug shaft, uniform distribution of the internal lubricating oil can be achieved, thereby extending the service life of the gear shaft.

[0012] The beneficial effects achieved by the utility model are:

[0013] 1. In the utility model, by setting up a structure in which the main gear shaft and the movable gear shaft can be spliced ​​with each other, and utilizing the axial sliding fit between the plug-in shaft spline and the sleeve seat, a flexible connection of the double gear shaft is achieved, which can effectively eliminate the assembly error caused by thermal expansion and contraction during assembly, thereby improving the transmission accuracy and stability.

[0014] 2. In the utility model, a one-way valve core is provided in the oil channel cavity, and a magnetic core structure is provided in the magnetic core, so as to effectively collect the wear debris generated during the transmission process, and at the same time ensure the effective circulation lubrication of the oil, thereby improving the wear resistance and service life of the gear shaft and reducing the maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of a separation state of an embodiment of the utility model;

[0017] Figure 3This is a schematic diagram of the main gear shaft surface structure of an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the surface structure of the movable gear shaft according to an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the movable gear shaft according to an embodiment of the present utility model.

[0020] Reference numerals:

[0021] 100, main gear shaft; 110, first gear; 120, sleeve; 130, magnetic core; 121, oil overflow hole; 200, movable gear shaft; 210, second gear; 220, plug-in shaft spline; 230, oil channel cavity; 231, centrifugal oil channel; 300, one-way valve core. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other unless there is any conflict.

[0023] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0024] The following is combined with Figure 1-Figure 5 Some embodiments of the present invention provide a dual gear shaft.

[0025] The utility model comprises a main gear shaft 100 and a movable gear shaft 200. A sleeve 120 is formed at one end of the main gear shaft 100, and a spline 220 is provided at one end of the movable gear shaft 200, adapted to fit within the sleeve 120. The surfaces of the main gear shaft 100 and movable gear shaft 200 are respectively provided with first and second coupling teeth 110 and 210, for torque transmission and connection.

[0026] The sleeve 120 is located between the first and second coupling teeth 110 and 210, and has a plurality of oil overflow holes 121 formed on its surface. A removable magnetic core 130 is mounted inside the oil overflow holes 121. This design ensures that the gear shaft automatically absorbs wear debris during transmission, reducing wear.

[0027] Furthermore, both the main gear shaft 100 and the movable gear shaft 200 have oil passage cavities 230 on their inner sides, with one-way valve cores 300 threaded onto both ends to seal the oil passage cavities 230 and maintain a tight seal for the lubricating oil. The spline teeth on the insert shaft 220 mate with the keyway grooves on the inner side of the sleeve 120, ensuring axial positioning while providing a certain amount of clearance to accommodate thermal expansion and contraction due to temperature fluctuations.

[0028] In this embodiment, the ends of the main gear shaft 100 and the movable gear shaft 200 are sealed by a one-way valve core 300, and lubricating oil is added to the oil channel cavity 230. When the gear shaft is running, the centrifugal oil channel 231 communicates with the oil channel cavity 230, forming an automatic lubrication channel, effectively reducing friction.

[0029] In another embodiment, the magnetic core 130 is made of a neodymium magnet and has a core hole inside to facilitate the passage of oil. Through magnetic attraction, the magnetic core 130 can effectively absorb metal debris generated during the operation of the gear shaft, thereby increasing the service life of the main gear shaft 100 and the movable gear shaft 200.

[0030] In this embodiment, the surface of the spline 220 is provided with multiple radially distributed centrifugal oil passages 231, which are evenly distributed along the axial direction. This design allows the centrifugal force to direct the oil into the centrifugal oil passages 231 when the gear shaft is running at high speed, further ensuring uniform lubrication.

[0031] In this embodiment, the one-way valve core 300 not only seals the oil passage cavity 230 but also incorporates a sealing ring to prevent lubricating oil leakage. Furthermore, a filter structure is added inside the oil passage cavity 230 to further filter impurities from the oil, ensuring lubrication of the gear shaft during long-term operation.

[0032] When the gear shaft is operating at high speed, the combination of sleeve 120 and spline 220 ensures a tight connection and automatic adjustment of the gear shaft, preventing assembly errors caused by temperature fluctuations. Furthermore, the magnetic attraction of core 130 and the sealing design of check valve core 300 provide the entire system with excellent self-maintenance capabilities.

[0033] In summary, through the above embodiments, the utility model not only realizes efficient transmission of the gear shaft, but also can automatically lubricate and absorb wear debris during operation, thereby improving the overall reliability and service life of the equipment.

[0034] Throughout this specification, terms such as "one embodiment," "some embodiments," or "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A double gear shaft, characterized in that: include: A main gear shaft (100) and a movable gear shaft (200) that can be connected to each other, one end of the main gear shaft (100) is provided with a sleeve seat (120), and one end of the movable gear shaft (200) is provided with a shaft spline (220) that is compatible with the sleeve seat (120), the surfaces of the main gear shaft (100) and the movable gear shaft (200) are respectively provided with a first connecting tooth (110) and a second connecting tooth (210), the sleeve seat (120) is located between the first connecting tooth (110) and the second connecting tooth (210), and the surface of the sleeve seat (120) is provided with a plurality of teeth evenly distributed in the circumferential direction. An oil overflow hole (121) is provided, a magnetic core (130) is detachably mounted on the inner side of the oil overflow hole (121), an oil channel cavity (230) is provided on the inner side of each of the main gear shaft (100) and the movable gear shaft (200), and a one-way valve core (300) is threadedly mounted on one end of the main gear shaft (100) and the movable gear shaft (200) and fixed to the end of the oil channel cavity (230), a plurality of centrifugal oil channels (231) in communication with the oil channel cavity (230) are provided on the surface of the plug-in shaft spline (220), and some of the centrifugal oil channels (231) are in communication with the oil overflow hole (121).

2. The double gear shaft according to claim 1, characterized in that: The surface of the inserted shaft spline (220) is provided with a plurality of spline teeth, and the inner side of the sleeve (120) is provided with a key tooth sleeve groove adapted to the inserted shaft spline (220), and the axial length of the sleeve (120) is greater than the length of the inserted shaft spline (220).

3. The double gear shaft according to claim 1, characterized in that: The one-way valve core (300) is used to seal the oil passage cavities (230) at the ends of the main gear shaft (100) and the movable gear shaft (200), and the oil passage cavities (230) are filled with lubricating oil.

4. The double gear shaft according to claim 1, characterized in that: The magnetic core (130) is a component made of a nebulium magnet material, and a core hole for oil to pass through is provided inside the magnetic core (130).

5. The double gear shaft according to claim 1, characterized in that: The centrifugal oil passages (231) are arranged radially, and the plurality of oil passage cavities (230) are in groups. Each group of oil passage cavities (230) is evenly distributed in the circumferential direction on the outer periphery of the oil passage cavity (230) and penetrates the surface of the plug-shaft spline (220). The oil passage cavities (230) of each group are evenly distributed axially along the surface of the plug-shaft spline (220).

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