Lock cylinder waterproof oil tank cover
By designing waterproof protrusions, waterproof rubber rings, and waterproof pads for the lock cylinder on the tractor fuel tank cover, the problem of lock cylinder erosion by rainwater and snowmelt was solved, achieving better waterproofing and sealing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIFANG XINRONG ELECTRIC CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-06-16
AI Technical Summary
Tractor fuel tank lock cylinders are prone to corrosion and rust due to rainwater and snowmelt, affecting normal use.
A waterproof oil tank cover for a lock cylinder was designed, comprising a waterproof boss, a waterproof rubber ring, a waterproof pad for the lock cylinder, and an easy-open side plate. Through the cooperation of these components, effective waterproofing of the lock cylinder is achieved, and the sealing performance is improved.
It effectively prevents water from flowing into the lock cylinder components, improves the waterproof effect and sealing of the lock cylinder, and ensures that the lock cylinder can be used normally in special environments.
Smart Images

Figure CN224360983U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tractor parts, specifically to a waterproof fuel tank cover with a lock core. Background Technology
[0002] Agricultural machinery such as tractors are likely to be used for farming operations in special environments. To ensure stability and continuous operation, the fuel tanks of these tractors and agricultural machinery are usually located on the outside of the equipment. The fuel tanks often need to be equipped with fuel tank locks to prevent fuel theft. However, because they are installed on the outside, rainwater and snowmelt can corrode the lock cylinder, causing it to rust and affecting the normal use of the lock. Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide an oil tank cover with a waterproof lock cylinder function.
[0004] The objective of this utility model is achieved through the following technical measures:
[0005] A waterproof fuel tank cover with a lock cylinder, characterized in that: it includes a fuel tank cover assembly, the fuel tank cover assembly including a fuel tank cover body, a rotating handle fixedly connected to the fuel tank cover body, a lock cover bearing fixedly connected to the rotating handle, a lock cover shaft rotatably connected to the lock cover bearing, a lock cover assembly connected to the lock cover shaft, a lock cylinder mounting hole provided on the rotating handle, a waterproof boss integrally provided on the outer side of the lock cylinder mounting hole, a waterproof rubber ring sleeved on the outer side of the waterproof boss, and a lock cover assembly fixedly connected to the inner side of the fuel tank cover body. The fuel tank cap assembly is connected to the fuel tank bottom cover via a connecting tenon. A lock cylinder component is provided between the fuel tank bottom cover and the fuel tank cap assembly. The lock cover assembly includes a waterproof lock cover. A pivot hole is provided on the side of the waterproof lock cover, through which the lock cover pivot passes. A lock cylinder groove is provided inside the waterproof lock cover, and a lock cylinder waterproof gasket is connected inside the lock cylinder groove. A rubber ring groove is provided inside the waterproof lock cover, and the rubber ring groove is configured to cooperate with a waterproof rubber ring. An easy-open side plate is fixedly connected to the side of the waterproof lock cover.
[0006] As an improvement: the fuel tank bottom cover includes a bottom cover body, a connecting slot is provided on the side of the bottom cover body, the connecting slot is connected with the connecting tenon, an installation thread is fixedly connected to the outer side of the bottom cover body, a locking tongue slot is provided on the inner side of the bottom cover body, multiple ventilation holes are provided on the bottom surface of the bottom cover body, and a rope hole is fixedly connected to the ground of the bottom cover body.
[0007] As an improvement: the lock cylinder component includes a lock cylinder assembly, the lock cylinder assembly includes a lock cylinder body, a rotating boss is fixedly connected to the side of the lock cylinder body, a control rod is fixedly connected to the bottom of the lock cylinder body, a lock cylinder insert is inserted into the lock cylinder body, a lock sleeve assembly is sleeved on the outside of the lock cylinder body, a lock cylinder top cover is sleeved on the lock cylinder body, and a lock hole waterproof panel is fixedly connected to the upper surface of the lock cylinder top cover.
[0008] As an improvement: the lock sleeve assembly includes a lock cylinder outer sleeve, a limiting boss is fixedly connected to the outer side of the lock cylinder outer sleeve, the limiting boss is engaged with the inner side of the oil tank cap body, a lock tongue groove is provided at the bottom of the lock cylinder outer sleeve, a lock tongue assembly is connected in the lock tongue groove, and a rotating stop is fixedly connected to the top of the lock cylinder outer sleeve, the rotating stop is engaged with the rotating boss.
[0009] As an improvement: the latch assembly includes a latch slider, which is slidably connected to the latch groove. A locking block is fixedly connected to one end of the latch slider. A control slot is provided on the upper surface of the latch slider, and the control slot is connected to the control rod.
[0010] As an improvement: a lock cylinder base plate is fixedly connected to the bottom of the lock cylinder outer sleeve, one end of a return spring is fixedly connected to the lower surface of the lock cylinder base plate, and the other end of the return spring is fixedly connected to the inner side of the bottom cover body.
[0011] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:
[0012] The waterproof protrusions provide a certain degree of waterproofing, preventing water from flowing into the lock cylinder components. With the waterproof lock cover closed, the waterproof rubber ring and groove effectively prevent water inflow. The waterproof lock cylinder gasket fits snugly against the waterproof panel of the keyhole when the cover is closed, further preventing water from entering the lock cylinder components and improving overall sealing. This enhances the waterproofing effect. The easy-open side plate allows for convenient opening of the waterproof lock cover, facilitating daily use and preventing unauthorized opening without external force. This further improves the waterproofing performance of the components in working environments and special weather conditions. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0014] Figure 2 This is an exploded structural diagram of the present invention.
[0015] Figure 3 yes Figure 2 A schematic diagram of the connection structure between the fuel tank cover assembly and the locking cover assembly.
[0016] Figure 4 yes Figure 2 Exploded view of the central lock cylinder component.
[0017] Figure 5 yes Figure 2 A cross-sectional three-dimensional structural diagram of the bottom cover of the fuel tank.
[0018] In the diagram: 1. Fuel tank cap assembly; 11. Fuel tank cap body; 12. Rotating handle; 13. Lock cover shaft seat; 14. Lock cover pivot; 15. Lock cylinder mounting hole; 16. Waterproof boss; 17. Waterproof rubber ring; 18. Connecting tenon; 2. Lock cover assembly; 21. Waterproof lock cover; 22. Pivot hole; 23. Lock cylinder groove; 24. Lock cylinder waterproof gasket; 25. Rubber ring groove; 26. Easy-open side plate; 3. Fuel tank bottom cover; 31. Bottom cover body; 32. Connecting groove; 33. Mounting thread; 34. Vent hole; 35. Rope 36. Lock tongue slot; 4. Lock cylinder assembly; 41. Lock hole waterproof panel; 42. Lock cylinder top cover; 43. Lock cylinder assembly; 431. Lock cylinder body; 432. Control lever; 433. Rotating boss; 434. Lock cylinder insert; 44. Lock sleeve assembly; 441. Lock cylinder outer sleeve; 442. Rotating stop; 443. Limiting boss; 444. Lock tongue slide groove; 45. Lock tongue assembly; 451. Lock tongue slider; 452. Locking block; 453. Control slot; 46. Lock cylinder base plate; 47. Return spring. Detailed Implementation
[0019] Example: Figures 1 to 5 As shown, a lock cylinder drain oil tank cover includes an oil tank cover assembly 1. The oil tank cover assembly 1 includes an oil tank cover body 11. A rotating handle 12 is fixedly connected to the oil tank cover body 11. A lock cover bearing 13 is fixedly connected to the rotating handle 12. A lock cover pivot 14 is rotatably connected to the lock cover bearing 13. The lock cover pivot 14 is connected to a lock cover assembly 2. A lock cylinder mounting hole 15 is provided on the rotating handle 12. A waterproof boss 16 is integrally provided on the outer side of the lock cylinder mounting hole 15. A waterproof rubber ring 17 is sleeved on the outer side of the waterproof boss 16. A connecting tenon is fixedly connected to the inner side of the oil tank cover body 11. 18. The fuel tank cap assembly 1 is connected to the fuel tank bottom cover 3 via a connecting tenon 18. A lock cylinder component 4 is provided between the fuel tank bottom cover 3 and the fuel tank cap assembly 1. The lock cover assembly 2 includes a waterproof lock cover 21. A pivot hole 22 is provided on the side of the waterproof lock cover 21. The lock cover pivot 14 passes through the pivot hole 22. A lock cylinder groove 23 is provided inside the waterproof lock cover 21. A lock cylinder waterproof gasket 24 is connected inside the lock cylinder groove 23. A rubber ring groove 25 is provided inside the waterproof lock cover 21. The rubber ring groove 25 is configured to cooperate with a waterproof rubber ring 17. An easy-open side plate 26 is fixedly connected to the side of the waterproof lock cover 21.
[0020] The waterproof protrusion 16 provides a certain degree of waterproofing, preventing water from flowing into the lock cylinder component 4. When the waterproof lock cover 21 is closed, the waterproof rubber ring 17 and the rubber ring groove 25 work together to effectively prevent water from flowing in. The lock cylinder waterproof pad 24 fits against the lock hole waterproof panel 41 when the waterproof lock cover 21 is closed, thus preventing water from flowing into the lock cylinder component 4 and improving the overall sealing performance. This results in a better waterproof effect. The easy-open side plate 26 makes it easier to open the waterproof lock cover 21, facilitating daily use and preventing it from being opened without external force. This further enhances the waterproof effect of the components in working environments and special weather conditions.
[0021] The fuel tank bottom cover 3 includes a bottom cover body 31. A connecting groove 32 is provided on the side of the bottom cover body 31, which engages with a connecting tenon 18. An installation thread 33 is fixedly connected to the outer side of the bottom cover body 31. A lock tongue slot 36 is provided on the inner side of the bottom cover body 31. Multiple ventilation holes 34 are provided on the bottom surface of the bottom cover body 31. A rope hole 35 is fixedly connected to the ground of the bottom cover body 31. The rope hole 35 facilitates the installation and removal of a lost rope, preventing contamination and loss of the fuel tank cover during refueling. The ventilation holes 34 balance internal and external pressure, preventing excessive pressure that could render the lock cylinder component 4 unusable. The installation thread 33 facilitates connection to the fuel tank. The connecting groove 32 and the connecting tenon 18 allow for quick assembly of the fuel tank cover body 11 and the bottom cover body, ensuring overall integrity during use.
[0022] The lock cylinder component 4 includes a lock cylinder assembly 43, which includes a lock cylinder body 431. A rotating boss 433 is fixedly connected to the side of the lock cylinder body 431, and a control rod 432 is fixedly connected to the bottom of the lock cylinder body 431. A lock cylinder insert 434 is inserted into the lock cylinder body 431, and a lock sleeve assembly 44 is sleeved on the outside of the lock cylinder body 431. A lock cylinder top cover 42 is sleeved on the lock cylinder body 431, and a lock hole waterproof panel 41 is fixedly connected to the upper surface of the lock cylinder top cover. The lock hole waterproof panel 41 provides waterproofing, and the lock cylinder top cover 42 prevents water from entering the lock cylinder assembly 43.
[0023] The lock sleeve assembly 44 includes a lock cylinder outer sleeve 441. A limiting boss 443 is fixedly connected to the outer side of the lock cylinder outer sleeve 441. The limiting boss 443 is engaged with the inner side of the oil tank cap body 11. A lock tongue groove 444 is provided at the bottom of the lock cylinder outer sleeve 441. A lock tongue assembly 45 is connected inside the lock tongue groove 444. A rotating stop 442 is fixedly connected to the top of the lock cylinder outer sleeve 441. The rotating stop 442 is engaged with the rotating boss 433. The rotating stop 442 and the rotating boss 433 facilitate the limiting of the lock cylinder assembly 43 without affecting the use of the lock tongue assembly 44.
[0024] The latch assembly 45 includes a latch slider 451, which is slidably connected to a latch groove 444. A locking block 452 is fixedly connected to one end of the latch slider 451. A control slot 453 is provided on the upper surface of the latch slider 451, and the control slot 453 is connected to a control rod 432. The latch slider 451 drives the locking block 452 to achieve locking, and the control slot 453 facilitates the lock cylinder assembly 44 to control the latch assembly 46.
[0025] The bottom of the lock cylinder outer sleeve 441 is fixedly connected to a lock cylinder base plate 46. One end of a return spring 47 is fixedly connected to the lower surface of the lock cylinder base plate 46, and the other end of the return spring 47 is fixedly connected to the inner side of the bottom cover body 31. The lock cylinder base plate 46 can prevent oil from entering the lock cylinder component 4, and the return spring 47 enables the overall up and down movement of the lock cylinder component 4.
Claims
1. A waterproof oil tank cover with a lock cylinder, characterized in that: The system includes a fuel tank cap assembly (1), which includes a fuel tank cap body (11). The fuel tank cap body (11) is fixedly connected to a rotating handle (12). A lock cap bearing (13) is fixedly connected to the rotating handle (12). A lock cap shaft (14) is rotatably connected to the lock cap bearing (13). A lock cap assembly (2) is connected to the lock cap shaft (14). A lock cylinder mounting hole (15) is provided on the rotating handle (12). A waterproof boss (16) is integrally provided on the outside of the lock cylinder mounting hole (15). A waterproof rubber ring (17) is sleeved on the outside of the waterproof boss (16). A connecting tenon (18) is fixedly connected to the inside of the fuel tank cap body (11). The component (1) is connected to the bottom cover (3) of the fuel tank by a connecting tenon (18). A lock cylinder component (4) is provided between the bottom cover (3) of the fuel tank and the fuel tank cover assembly (1). The lock cover assembly (2) includes a waterproof lock cover (21). A pivot hole (22) is provided on the side of the waterproof lock cover (21). The lock cover pivot (14) is provided through the pivot hole (22). A lock cylinder groove (23) is provided inside the waterproof lock cover (21). A lock cylinder waterproof pad (24) is connected inside the lock cylinder groove (23). A rubber ring groove (25) is provided inside the waterproof lock cover (21). The rubber ring groove (25) is matched with a waterproof rubber ring (17). An easy-open side plate (26) is fixedly connected to the side of the waterproof lock cover (21).
2. The waterproof oil tank cover for a lock cylinder according to claim 1, characterized in that: The bottom cover (3) of the fuel tank includes a bottom cover body (31), a connecting slot (32) is provided on the side of the bottom cover body (31), the connecting slot (32) is connected with the connecting tenon (18), the outer side of the bottom cover body (31) is fixedly connected with an installation thread (33), the inner side of the bottom cover body (31) is provided with a locking tongue slot (36), the bottom surface of the bottom cover body (31) is provided with multiple ventilation holes (34), and the bottom surface of the bottom cover body (31) is fixedly connected with a rope hole (35).
3. A waterproof oil tank cover for a lock cylinder according to claim 2, characterized in that: The lock cylinder component (4) includes a lock cylinder assembly (43), which includes a lock cylinder body (431). A rotating boss (433) is fixedly connected to the side of the lock cylinder body (431). A control rod (432) is fixedly connected to the bottom of the lock cylinder body (431). A lock cylinder insert (434) is inserted into the lock cylinder body (431). A lock sleeve assembly (44) is sleeved on the outside of the lock cylinder body (431). A lock cylinder top cover (42) is sleeved on the lock cylinder body (431). A lock hole waterproof panel (41) is fixedly connected to the upper surface of the lock cylinder top cover.
4. A waterproof oil tank cover for a lock cylinder according to claim 3, characterized in that: The lock sleeve assembly (44) includes a lock cylinder outer sleeve (441), a limiting boss (443) is fixedly connected to the outer side of the lock cylinder outer sleeve (441), the limiting boss (443) is engaged with the inner side of the oil tank cap body (11), a lock tongue groove (444) is provided at the bottom of the lock cylinder outer sleeve (441), a lock tongue assembly (45) is connected in the lock tongue groove (444), and a rotating stop (442) is fixedly connected to the top of the lock cylinder outer sleeve (441), the rotating stop (442) is engaged with the rotating boss (433).
5. A waterproof oil tank cover for a lock cylinder according to claim 4, characterized in that: The latch assembly (45) includes a latch slider (451), which is slidably connected to the latch groove (444). A locking block (452) is fixedly connected to one end of the latch slider (451). A control slot (453) is provided on the upper surface of the latch slider (451), and the control slot (453) is connected to the control rod (432).
6. A waterproof oil tank cover for a lock cylinder according to claim 4, characterized in that: The bottom of the lock cylinder outer sleeve (441) is fixedly connected to the lock cylinder base plate (46), and one end of the reset spring (47) is fixedly connected to the lower surface of the lock cylinder base plate (46). The other end of the reset spring (47) is fixedly connected to the inner side of the bottom cover body (31).