Gearbox oiling mechanism and gearbox oiling device
Patent Information
- Application Number
- CN202621488710.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-21
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2036-09-21
AI Technical Summary
[0002]一些复杂场景例如井下的掘进设备的齿轮箱，非地面静置状态，齿轮箱上的加油口远离地面且位置变化较大，润滑油桶无法接近的齿轮箱，在对齿轮箱润滑油加注和更换过程中存在极大的困难
本实施例提供的齿轮箱加油机构，通过加油头设置外螺纹与齿轮箱进油接头螺接，并在加油头与转接头之间设置支撑轴承及位于支撑轴承外侧的密封组件，同时将输油软管连接于转接头上，当操作人员旋拧加油头使其与齿轮箱的进油接头螺纹锁紧或松开时，加油头相对转接头产生旋转运动，该旋转运动由支撑轴承承接并实现转动解耦，使得转接头及与其固连的输油软管无需跟随加油头一同扭转，从而有效避免了输油软管因扭转变形而产生的缠绕、疲劳损伤及操作阻力，还能够有效消除输油软管扭力对操作人员的反作用干扰，显著提升对接操作便捷性和注油效率；同时，输油软管具有一定的形变能力，能够根据加油泵和齿轮箱的相对位置进行适应性变化，便于对接，能够显著降低油液加注和更换难度。并且，密封组件设置在支撑轴承的外侧，既能够在加油头与转接头之间形成独立且可靠的动密封路径，防止高压润滑油沿转动配合间隙向外泄漏，又避免了对支撑轴承内部滚道或滚动体的直接油液冲击与污染，确保轴承转动灵活性和长期使用寿命。
Smart Images
Figure CN224903963U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transmission device technology, and more specifically, to a gearbox lubrication mechanism and a gearbox lubrication device. Background Technology
[0002] In some complex scenarios, such as gearboxes in underground tunneling equipment, where the gearbox is not stationary on the ground, the oil filler port is far from the ground and its position varies greatly, and the lubricating oil tank cannot be accessed, there are great difficulties in adding and changing the gearbox lubricating oil. Utility Model Content
[0003] The purpose of this utility model includes, for example, providing a gearbox refueling mechanism and gearbox refueling device, which can reduce the difficulty of refueling and replacing oil in the gearbox of downhole tunneling equipment, shorten operation time, and improve operation efficiency.
[0004] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a gearbox refueling mechanism, comprising: The system includes a fuel filler head, an adapter, a support bearing, a sealing assembly, a fuel hose, and a dust cover. The fuel filler head has an external thread for screwing into the fuel inlet connector of the gearbox. The fuel filler head and the adapter are rotatably connected via the support bearing. The sealing assembly is installed between the fuel filler head and the adapter, and is located outside the support bearing. One end of the fuel hose is connected to the adapter, and the other end is used to connect to the fuel outlet connector of the fuel pump. The dust cover is installed between the fuel filler head and the adapter, and the dust cover is located on the side of the sealing assembly near the fuel hose.
[0005] In an optional embodiment, the filler head is provided with a stepped hole, the stepped hole including a first hole segment and a second hole segment that are connected, the diameter of the first hole segment being larger than the diameter of the second hole segment, and the connection between the first hole segment and the second hole segment forming an annular stepped surface; the adapter is inserted into the first hole segment and contacts the annular stepped surface; the sealing assembly and the support bearing are both located in the first hole segment, and the sealing assembly is located on the side of the support bearing away from the second hole segment.
[0006] In an optional embodiment, the annular step surface includes an annular circular surface and an annular conical surface. The inner edge of the annular circular surface is connected to the end of the annular conical surface with a larger aperture, and the end of the annular conical surface with a smaller aperture is connected to the second hole segment. One end face of the adapter is in contact with the annular circular surface.
[0007] In an optional embodiment, the support bearing is sleeved outside the adapter and contacts the annular surface; The gearbox lubrication mechanism further includes a spacer ring, which is sleeved on the outside of the adapter and contacts the side of the support bearing away from the annular surface; the sealing assembly is sleeved on the outside of the adapter and contacts the side of the spacer ring away from the support bearing.
[0008] In an optional embodiment, the outer peripheral surface of the fuel filler head is provided with a first anti-spin portion; And / or, the outer peripheral surface of the adapter is provided with a second anti-rotation part.
[0009] In an optional embodiment, one end of the oil delivery hose is sleeved on the end of the adapter away from the fuel filler head, and the oil delivery hose and the adapter are fixedly connected by a fastening member sleeved on the oil delivery hose.
[0010] In an optional embodiment, the gearbox refueling mechanism further includes a dust cover installed between the refueling head and the adapter, the dust cover being located on the side of the sealing assembly near the oil delivery hose.
[0011] In an optional embodiment, the dust cover includes an annular plate portion, an annular cylinder portion, and a threaded cylinder portion. The outer edge of the annular plate portion is connected to one end of the annular cylinder portion. One end of the threaded cylinder portion is closed while the other end is open. The threaded cylinder portion is located inside the annular cylinder portion and is fixedly connected to the inner circumferential surface of the annular cylinder portion. The open end of the threaded cylinder portion penetrates through the annular cylinder portion. The hollow area of the annular plate is sleeved on the outside of the adapter, and the annular cylinder is inserted into the filler head; the filler head is equipped with an anti-loosening screw, which is screwed into the threaded cylinder.
[0012] In an alternative embodiment, the dust cover contacts the side of the sealing assembly furthest from the support bearing.
[0013] Secondly, this utility model provides a gearbox lubrication device, the gearbox lubrication device comprising: The refueling pump and the gearbox refueling mechanism according to any one of the foregoing embodiments, wherein the oil outlet connector of the refueling pump is fixedly connected to the oil delivery hose of the gearbox refueling mechanism.
[0014] The beneficial effects of this utility model embodiment include, for example: The gearbox refueling mechanism provided in this embodiment uses a refueling head with an external thread that is screwed to the gearbox inlet connector. A support bearing and a sealing assembly located outside the support bearing are provided between the refueling head and the adapter. The oil delivery hose is connected to the adapter. When the operator screws the refueling head to lock or loosen it from the gearbox inlet connector, the refueling head rotates relative to the adapter. This rotation is supported by the support bearing and achieves rotational decoupling, so that the adapter and the oil delivery hose fixed to it do not need to twist with the refueling head. This effectively avoids the entanglement, fatigue damage, and operating resistance caused by the torsional deformation of the oil delivery hose. It also effectively eliminates the reaction interference of the oil delivery hose torque on the operator, significantly improving the convenience of docking operation and the efficiency of refueling. At the same time, the oil delivery hose has a certain deformation capacity and can adapt to the relative position of the refueling pump and the gearbox, which facilitates docking and significantly reduces the difficulty of oil filling and replacement. Furthermore, the sealing assembly is located on the outside of the support bearing, which can form an independent and reliable dynamic sealing path between the oil filler and the adapter, preventing high-pressure lubricating oil from leaking outward along the rotational fit clearance, and avoiding direct oil impact and contamination of the raceway or rolling elements inside the support bearing, thus ensuring the bearing's rotational flexibility and long service life. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the application structure of the gearbox lubrication mechanism provided in this embodiment; Figure 2 This is a schematic diagram of the gearbox refueling mechanism provided in this embodiment; Figure 3 This is a partial cross-sectional view of the gearbox refueling mechanism provided in this embodiment; Figure 4 This is a schematic diagram of the structure of the fuel filler head provided in this embodiment; Figure 5 This is a schematic diagram of the structure of the dust cover provided in this embodiment.
[0017] icon: 001-Gearbox; 002-Gearbox lubrication mechanism; 100-Fueling head; 110-External thread; 120-Stepped hole; 121-First hole section; 122-Second hole section; 123-Annular circular surface; 124-Annular conical surface; 130-First anti-rotation part; 140-Positioning hole; 200-Adapter; 210-Second anti-rotation part; 300-Support bearing; 400-Sealing assembly; 500-Oil hose; 600-Distance ring; 700-Tightening component; 800-Dust cover; 810-Annular plate part; 820-Annular cylinder part; 830-Threaded cylinder part; 900-Anti-loosening screw. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments 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, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0021] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, 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, and therefore should not be construed as a limitation of this utility model.
[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0023] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0024] Please refer to Figure 2This embodiment provides a gearbox refueling mechanism 002, which includes a refueling head 100, an adapter 200, a support bearing 300, a sealing assembly 400, and a fuel hose 500. The refueling head 100 is provided with an external thread 110 for screwing into the fuel inlet connector of the gearbox 001; the refueling head 100 and the adapter 200 are rotatably connected through the support bearing 300; the sealing assembly 400 is installed between the refueling head 100 and the adapter 200, and is located outside the support bearing 300; one end of the fuel hose 500 is connected to the adapter 200, and the other end is used to connect to the fuel pump outlet connector.
[0025] As described above, the working principle of the gearbox lubrication mechanism 002 provided in this embodiment is as follows: Please combine Figure 1 and Figure 2 During the oil filling operation, the operator holds the oil filler head 100, aligns its external thread 110 with the oil inlet connector of the gearbox 001, and begins to tighten it. Since the oil filler head 100 and the adapter 200 are rotatably connected via a support bearing 300, when the oil filler head 100 rotates to tighten the thread, the adapter 200 and the oil hose 500 fixedly connected to it do not rotate synchronously. The inner ring of the support bearing 300 rotates with the oil filler head 100, while the outer ring remains stationary, thus completely decoupling the tightening rotation of the oil filler head 100 from the oil hose 500. Simultaneously, the sealing assembly 400 installed between the oil filler head 100 and the adapter 200 maintains contact and pressure even as they rotate relative to each other, forming a dynamic sealing interface. This ensures that the high-pressure lubricating oil, flowing from the oil hose 500 through the adapter 200 into the oil filler head 100 and then into the gearbox 001, does not leak outwards along the rotational clearance. Therefore, the oil hose 500 remains naturally untwisted throughout the entire tightening and connection process. The operator only needs to focus on tightening the threads of the filler head 100. After starting the filler pump, the lubricating oil can be smoothly injected into the gearbox 001 via the oil hose 500, adapter 200, and filler head 100. During disassembly, the filler head 100 is tightened in the opposite direction, and the oil hose 500 also does not experience any torsional force, achieving a quick, effortless, and damage-free disassembly and assembly operation.
[0026] The following embodiments illustrate the details of the gearbox lubrication mechanism 002 of this application by way of example.
[0027] Please combine Figures 2-5In this embodiment, optionally, the gearbox refueling mechanism 002 includes a refueling head 100, an adapter 200, a support bearing 300, a sealing assembly 400, a refueling hose 500, a spacer ring 600, a fastening element 700, a dust cover 800, and an anti-loosening screw 900. One end of the refueling head 100 is provided with an external thread 110, and the other end of the refueling head 100 is connected to the adapter 200. The support bearing 300 is sleeved outside the adapter 200 and located inside the refueling head 100. The support bearing 300 enables the refueling head 100 and the adapter 200 to be rotatably connected, and ensures that the refueling head 100 and the adapter 200 do not slide relative to each other axially. The sealing assembly 400 is installed between the refueling head 100 and the adapter 200, and is located outside the support bearing 300. The spacer ring 600 is sleeved outside the adapter 200 and is located between the support bearing 300 and the sealing assembly 400. A dust cover 800 is installed between the filler head 100 and the adapter 200, located on the side of the sealing assembly 400 away from the support bearing 300. A locking screw 900 passes through the filler head 100 and is screwed into the dust cover 800. When the locking screw 900 is loosened, the dust cover 800 can slide axially relative to the filler head 100 and the adapter 200, thereby enabling maintenance and replacement operations. One end of the fuel hose 500 is fitted over the adapter 200 and secured to the adapter 200 by a fastening member 700. In use, the end of the filler head 100 away from the adapter 200 can be inserted into the fuel inlet connector of the gearbox 001 and screwed into the fuel inlet connector using external threads 110. Simultaneously, the end of the fuel hose 500 away from the adapter 200 can be fitted onto the fuel pump outlet connector and secured by the fastening member 700. After the fuel pump is started, the fuel can enter the gearbox 001 through the fuel hose 500, adapter 200 and fuel nozzle 100.
[0028] Please combine Figures 3-4Optionally, the filler head 100 is provided with a stepped hole 120 and a positioning hole 140. The stepped hole 120 includes a first hole segment 121 and a second hole segment 122 that are connected. The cross-sectional profiles of both the first hole segment 121 and the second hole segment 122 can be circular, and the cross-section is a plane perpendicular to the axis of the stepped hole 120. Furthermore, the diameter of the first hole segment 121 is larger than the diameter of the second hole segment 122. The first hole segment 121 and the second hole segment 122 are coaxially arranged, and the connection between the first hole segment 121 and the second hole segment 122 forms an annular stepped surface. Further, the annular stepped surface includes a coaxial annular circular surface 123 and an annular conical surface 124. The inner edge of the annular circular surface 123 is connected to the end of the annular conical surface 124 with a larger diameter, and the end of the annular conical surface 124 with a smaller diameter is connected to the second hole segment 122. That is, the annular conical surface 124 forms a conical hole segment, and the first hole segment 121, the conical hole segment, and the second hole segment 122 are coaxial and connected in sequence. The positioning hole 140 can be set as a circular through hole, which penetrates the peripheral wall of the filler head 100 along the radial direction of the filler head 100. One end of the positioning hole 140 is connected to the first hole segment 121, and the other end is located on the outer peripheral surface of the filler head 100.
[0029] It should be understood that the number of positioning holes 140 can be one or more. For example, in this embodiment, the number of positioning holes 140 is two, and the two positioning holes 140 are arranged in a mirror symmetrical manner. A locking screw is installed in each positioning hole 140.
[0030] Optionally, a first anti-rotation part 130 is provided on the outer peripheral surface of the filler head 100. The first anti-rotation part 130 can be set as an external hexagonal nut, and the first anti-rotation part 130 protrudes radially relative to the outer peripheral surface of the filler head 100. The first anti-rotation part 130 can engage with a tool, and by applying force to the tool, it is easy to drive the filler head 100 to rotate, thereby facilitating the screwing of the filler head 100 onto the gearbox 001.
[0031] Please combine Figure 3Optionally, the adapter 200 is configured as a hollow component, with one end inserted into the first hole section 121. The end face of the adapter 200 contacts the annular surface 123, which limits the insertion depth of the adapter 200. Simultaneously, a support bearing 300 is sleeved on the outside of the adapter 200, located within the first hole section 121. The inner ring of the support bearing 300 contacts the annular surface 123, which restricts the downward freedom of the support bearing 300. A spacer ring 600 is sleeved on the outside of the adapter 200, located within the first hole section 121, and contacts the side of the support bearing 300 away from the annular ring. A sealing assembly 400 is sleeved on the outside of the adapter 200, located within the first hole section 121, and contacts the side of the spacer ring 600 away from the support bearing 300. The dust cover 800 is sleeved on the outside of the adapter 200 and is located inside the first hole section 121. One side of the dust cover 800 contacts the side of the sealing assembly 400 away from the spacer ring 600. The dust cover 800 can be fixed to the oil filler head 100 by locking screws. In this way, the axial freedom of the support bearing 300, the spacer ring 600 and the sealing assembly 400 can be restricted by the cooperation of the annular ring and the dust cover 800. In other words, the support bearing 300, the spacer ring 600, the sealing assembly 400, and the dust cover 800 are all located within the first hole section 121 and sequentially sleeved on the outside of the adapter 200. The support bearing 300 contacts the annular surface 123, which restricts the downward movement of the support bearing 300, the spacer ring 600, and the sealing assembly 400. The dust cover 800 restricts the upward movement of the support bearing 300, the spacer ring 600, and the sealing assembly 400. The positions of these components are stable and reliable, making them less prone to failure. Furthermore, the design of the dust cover 800 reduces the probability of external impurities entering the outside of the sealing assembly 400, extending the service life of the sealing assembly 400. The dust cover 800 offers multiple functions, saving components, simplifying the structure, and reducing costs.
[0032] It should be understood that the sealing component 400 can be configured as a skeleton oil seal, etc.
[0033] Furthermore, a second anti-rotation part 210 can be provided on the outer peripheral surface of the adapter 200. The second anti-rotation part 210 can be set as an external hexagonal nut, and the second anti-rotation part 210 protrudes radially relative to the outer peripheral surface of the adapter 200. The second anti-rotation part 210 can engage with a tool to ensure that the adapter 200 remains stationary when the oil filler head 100 is rotated.
[0034] In this embodiment, optionally, the oil delivery hose 500 can be set as a corrugated pipe, which has strong deformation capability and can better adapt to complex environments, so as to realize the connection between the gearbox 001 and the refueling pump in complex environments.
[0035] Please combine Figure 3 and Figure 5 In this embodiment, optionally, the dust cover 800 includes an integral annular plate portion 810, an annular cylindrical portion 820, and a threaded cylindrical portion 830. The outer edge of the annular plate portion 810 is connected to one end of the annular cylindrical portion 820, and the annular plate portion 810 and the annular cylindrical portion 820 are coaxially arranged. One end of the threaded cylindrical portion 830 is closed while the other end is open. The threaded cylindrical portion 830 is located inside the annular cylindrical portion 820 and is fixedly connected to the inner circumferential surface of the annular cylindrical portion 820. The open end of the threaded cylindrical portion 830 penetrates through the annular cylindrical portion 820, and the axial direction of the threaded cylindrical portion 830 is consistent with the radial direction of the annular cylindrical portion 820.
[0036] It should be understood that there are two threaded cylindrical portions 830, each cooperating with one of the two anti-loosening screws 900. That is, when the dust cover 800 is assembled, the hollow area of the annular plate portion 810 is fitted over the adapter 200, and the annular cylindrical portion 820 is inserted into the first hole section 121 of the filler head 100. The end of the annular cylindrical portion 820 away from the annular plate portion 810 contacts the sealing assembly 400. Furthermore, the threaded cylindrical portion 830 communicates with the corresponding positioning hole 140. When the anti-loosening screw 900 is tightened, it can enter the threaded cylindrical portion 830, thereby locking the dust cover 800 onto the filler head 100 and preventing the dust cover 800 from falling off. Because the threaded hole of the threaded cylindrical portion 830 is independent of the first hole section 121, even if there is oil leakage at the sealing assembly 400, it will not enter the threaded cylindrical portion 830, thus preventing contamination of the anti-loosening screw 900 and extending the service life of the anti-loosening screw 900.
[0037] In addition, the fastening element 700 can be made of steel wire or clamp, etc.
[0038] The gearbox 001 refueling device provided in this embodiment has an external thread 110 on the refueling head 100 that is screwed to the oil inlet connector of the gearbox 001. A support bearing 300 and a sealing assembly 400 located outside the support bearing 300 are provided between the refueling head 100 and the adapter 200. At the same time, the oil delivery hose 500 is connected to the adapter 200. When the operator screws the refueling head 100 to lock or loosen it from the oil inlet connector of the gearbox 001, the refueling head 100 rotates relative to the adapter 200. This rotation is supported by the support bearing 300 and achieves rotational decoupling, so that the adapter 200 and the oil delivery hose 500 fixed to it do not need to twist with the refueling head 100. This effectively avoids the entanglement, fatigue damage and operating resistance caused by the torsional deformation of the oil delivery hose 500. It can also effectively eliminate the reaction interference of the torque of the oil delivery hose 500 on the operator, and significantly improve the convenience of docking operation and the oil filling efficiency.
[0039] This embodiment also provides a gearbox refueling device, which includes a refueling pump and a gearbox refueling mechanism 002 as described in the above embodiment. The oil outlet of the refueling pump is fixedly connected to the oil delivery hose 500 of the gearbox refueling mechanism 002. The gearbox refueling device is convenient to operate and has high work efficiency when refueling.
[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A gearbox refueling mechanism, characterized in that, include: The fuel filler head (100), adapter (200), support bearing (300), sealing assembly (400), fuel hose (500), and dust cover (800) are provided. The fuel filler head (100) is provided with an external thread (110) for screwing into the fuel inlet connector of the gearbox (001). The fuel filler head (100) and the adapter (200) are rotatably connected through the support bearing (300). The sealing assembly (400) is installed between the fuel filler head (100) and the adapter (200) and is located outside the support bearing (300). One end of the fuel hose (500) is connected to the adapter (200), and the other end is used to connect to the fuel outlet connector of the fuel pump. The dust cover (800) is installed between the filler head (100) and the adapter (200), and the dust cover (800) is located on the side of the sealing assembly (400) near the oil hose (500).
2. The gearbox lubrication mechanism according to claim 1, characterized in that: The filler head (100) is provided with a stepped hole (120), the stepped hole (120) includes a first hole segment (121) and a second hole segment (122) that are connected. The diameter of the first hole segment (121) is larger than the diameter of the second hole segment (122). The connection between the first hole segment (121) and the second hole segment (122) forms an annular stepped surface. The adapter (200) is inserted into the first hole segment (121) and contacts the annular stepped surface. The sealing assembly (400) and the support bearing (300) are both located in the first hole segment (121). The sealing assembly (400) is located on the side of the support bearing (300) away from the second hole segment (122).
3. The gearbox lubrication mechanism according to claim 2, characterized in that: The annular stepped surface includes an annular circular surface (123) and an annular conical surface (124). The inner edge of the annular circular surface (123) is connected to the end of the annular conical surface (124) with a larger aperture. The end of the annular conical surface (124) with a smaller aperture is connected to the second hole segment (122). One end face of the adapter (200) is in contact with the annular circular surface (123).
4. The gearbox lubrication mechanism according to claim 3, characterized in that: The support bearing (300) is sleeved on the adapter (200) and contacts the annular surface (123); The gearbox lubrication mechanism further includes a spacer ring (600), which is sleeved on the adapter (200) and contacts the side of the support bearing (300) away from the annular surface (123); the sealing assembly (400) is sleeved on the adapter (200) and contacts the side of the spacer ring (600) away from the support bearing (300).
5. The gearbox lubrication mechanism according to claim 1, characterized in that: The outer peripheral surface of the fuel filler head (100) is provided with a first anti-spin part (130). And / or, the outer peripheral surface of the adapter (200) is provided with a second anti-rotation part (210).
6. The gearbox lubrication mechanism according to claim 1, characterized in that: One end of the oil delivery hose (500) is sleeved on the end of the adapter (200) away from the fuel filler head (100), and the oil delivery hose (500) and the adapter (200) are fixedly connected by a fastening member (700) sleeved on the oil delivery hose (500).
7. The gearbox lubrication mechanism according to claim 1, characterized in that: The dust cover (800) includes an annular plate portion (810), an annular cylindrical portion (820), and a threaded cylindrical portion (830). The outer edge of the annular plate portion (810) is connected to one end of the annular cylindrical portion (820). One end of the threaded cylindrical portion (830) is closed while the other end is open. The threaded cylindrical portion (830) is located inside the annular cylindrical portion (820). The threaded cylindrical portion (830) is fixedly connected to the inner circumferential surface of the annular cylindrical portion (820). The open end of the threaded cylindrical portion (830) penetrates the annular cylindrical portion (820). The hollow area of the annular plate portion (810) is sleeved outside the adapter (200), and the annular cylindrical portion (820) is inserted into the filler head (100); an anti-loosening screw (900) is installed on the filler head (100), and the anti-loosening screw (900) is screwed into the threaded cylindrical portion (830).
8. The gearbox lubrication mechanism according to claim 7, characterized in that: The dust cover (800) contacts the side of the sealing assembly (400) away from the support bearing (300).
9. A gearbox lubrication device, characterized in that, The gearbox lubrication device includes: The fuel pump and the gearbox refueling mechanism according to any one of claims 1-8, wherein the fuel pump's outlet connector is fixedly connected to the fuel delivery hose (500) of the gearbox refueling mechanism.