Downlock safety pin of nose landing gear
By using a combined structure of pin rod, screw rod, ball and spring in the front landing gear lower lock safety pin, controlling the position of the ball, solving the problem of the inability to control the steel ball in the prior art, and improving the reliability and safety of operation , prevent the occurrence of forgetting to remove.
Patent Information
- Application Number
- CN202420050354.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-09
AI Technical Summary
Most of the front landing gear lower lock insurance pins on the market are integrated structures and cannot control the steel balls, which leads to the easy forgetting to remove them during reuse, causing unexpected risks.
A structure consisting of pin rods, screw rods, balls and springs is designed to control the position of the balls through compression and extension of the springs, ensuring that they are properly installed and removed, and a lock ring and warning red flag are mounted on the annular disc to Remind the operator.
Controllable shrinkage of the insured pin steel ball is achieved, avoiding the situation of forgetting to remove it, and improving the reliability and safety of operation.
Smart Images
Figure CN222202899U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of aircraft maintenance tools, and in particular relates to a front landing gear lower lock safety pin. Background Art
[0002] refer to Figure 5 and Figure 6 When the aircraft is parked on the ground, in order to prevent the front landing gear from being accidentally retracted, it is necessary to insert the front landing gear lower lock safety pin 11 into the aircraft front landing gear lower lock, so as to avoid the accidental folding between the upper locking strut and the lower locking strut of the front landing gear lower lock, thereby avoiding accidents. Most of the safety pins on the market are integrated structures, and only a steel ball is set at the head of the safety pin as a limit to limit the object to be locked. This kind of safety pin cannot control the steel ball, and it relies entirely on brute force to pull the safety pin, which is easy to scratch the locked parts. When reused, it may be forgotten to be removed due to its inconspicuousness. Utility Model Content
[0003] In view of this, an object of the present invention is to provide a front landing gear down position lock safety pin, which is used to overcome the above-mentioned problems or at least partially solve or alleviate the above-mentioned problems.
[0004] The utility model provides a front landing gear lower lock safety pin, comprising:
[0005] A pin rod, wherein the pin rod is a cylindrical structure, an annular disk is arranged on the outer side of the root end of the pin rod, and a shrinking through hole is arranged on the side wall of the end of the pin rod;
[0006] A screw rod, the screw rod is inserted into the pin rod, a flange is connected to the end of the screw rod, an annular groove is provided on the side wall of the screw rod near the root, and a nut of the screw rod blocks the end opening of the pin rod;
[0007] A ball, wherein the ball is arranged between the shrinking through hole and the root of the screw rod, and the diameter of the ball is larger than the minimum diameter of the shrinking through hole;
[0008] A spring is arranged between the flange and the pin rod.
[0009] The utility model also has the following optional features.
[0010] Optionally, a locking ring and a warning red flag are mounted on the annular disk.
[0011] Optionally, the root end of the pin rod has a large step shaft section.
[0012] Optionally, a first countersunk hole is provided in the port of the large step shaft section, and the spring extends into the first countersunk hole.
[0013] Optionally, a second countersunk hole is provided in the port at the end of the pin rod, the shrinkage through hole is connected to the second countersunk hole, and the nut of the screw rod is sunk into the second countersunk hole.
[0014] Beneficial effects of the utility model:
[0015] The front landing gear lower lock safety pin of the utility model is provided by inserting a screw rod into the pin rod, connecting a flange plate at one end of the screw rod, arranging a spring between the flange plate and the screw rod, arranging an annular groove on the screw rod to accommodate the ball, and changing the positional relationship between the annular groove on the screw rod and the ball by compressing the spring, thereby realizing the contraction control of the ball, the contraction control of the steel ball unit of the safety pin, and being equipped with a warning red flag to prevent the situation of forgetting to remove it during repeated use. The front landing gear lower lock safety pin of the utility model has a simple structure, reliable performance, and is easy to operate and maintain. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the full cross-section structure of the front landing gear lower lock safety pin of the utility model;
[0017] Figure 2 It is an external structural diagram of the front landing gear lower lock safety pin of the utility model;
[0018] Figure 3 yes Figure 1 An enlarged view of the root end of the center front landing gear lower lock safety pin;
[0019] Figure 4 yes Figure 1 A magnified view of the end of the middle front landing gear lower lock safety pin;
[0020] Figure 5 This is the structural diagram of the front landing gear of the aircraft;
[0021] Figure 6 yes Figure 5 Nose landing gear down lock safety pin in.
[0022] In the above figure: 1. Pin rod; 101. Large step shaft section; 102. First countersunk hole; 103. Second countersunk hole; 2. Annular disk; 3. Shrinking through hole; 4. Screw rod; 5. Flange; 6. Annular groove; 7. Ball; 8. Spring; 9. Locking ring; 10. Warning red flag; 11. Front landing gear lower lock safety pin.
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; DETAILED DESCRIPTION
[0024] Example 1
[0025] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The embodiment of the utility model proposes a front landing gear down position lock safety pin, comprising: a pin rod 1, a screw rod 4, a ball 7 and a spring 8; the pin rod 1 is a cylindrical structure, an annular disk 2 is arranged on the outer side of the root end of the pin rod 1, and a shrinkage through hole 3 is arranged on the side wall of the end of the pin rod 1; the screw rod 4 is inserted into the pin rod 1, and a flange 5 is connected to the end of the screw rod 4, and an annular groove 6 is arranged on the side wall of the screw rod 4 near the root, and the nut of the screw rod 4 blocks the end of the pin rod 1; the ball 7 is arranged between the shrinkage through hole 3 and the root of the screw rod 4, and the diameter of the ball 7 is larger than the minimum diameter of the shrinkage through hole 3; the spring 8 is arranged between the flange 5 and the pin rod 1.
[0026] When in use, at the lower lock of the front landing gear of the aircraft, when installing the lower lock safety pin 11 of the front landing gear, the staff first presses the flange 5 of the safety pin, at which time the spring 8 is compressed, and the flange 5 pushes the screw rod 4 to move toward the end in the pin rod 1 until the annular groove 6 is directly opposite to the shrinking through hole 3, at which time the ball 7 sinks into the annular groove 6; the staff inserts the pin rod 1 of the lower lock safety pin 11 of the front landing gear into the lower lock pin hole of the front landing gear, until the shrinking through hole 3 at the end of the pin rod 1 is completely exposed from the lower lock pin hole of the front landing gear, and then releases the flange 5, at which time the spring 8 extends to push the pin rod 1 to reset to the root end, the annular groove 6 slides laterally, and the side wall of the screw rod 4 pushes the ball 7 out of the shrinking through hole 3.
[0027] When removing the front landing gear lower lock safety pin 11, first press the flange 5, and then slowly pull the front landing gear lower lock safety pin 11 out of the front landing gear lower lock pin hole.
[0028] Example 2
[0029] refer to Figure 1 On the basis of Example 1, a locking ring 9 and a warning red flag 10 are mounted on the annular disk 2.
[0030] The edge of the annular disk 2 is perforated to mount a locking ring 9 and a warning red flag 10, which can remind the staff and prevent the staff from forgetting to pull out the safety pin after checking the aircraft landing gear before the aircraft takes off.
[0031] Example 3
[0032] refer to Figure 1 and Figure 2 On the basis of Example 2, the root end of the pin rod 1 has a large step shaft section 101.
[0033] The large step shaft section 101 can limit the axial position of the pin rod 1 , and its inner side is used to accommodate the spring 8 .
[0034] Example 4
[0035] refer to Figure 1 and Figure 2 On the basis of Example 3, a first countersunk hole 102 is provided in the port of the large step shaft section 101 , and the spring 8 extends into the first countersunk hole 102 .
[0036] The spring 8 is completely mounted on the inner side of the large step shaft section 101 , with one end of the spring 8 resting on the inner end of the flange 6 and the other end resting on the bottom of the first countersunk hole 102 .
[0037] Example 5
[0038] refer to Figure 1 and Figure 3 On the basis of Example 3, a second countersunk hole 103 is provided in the port at the end of the pin rod 1 , the shrinkage through hole 3 is connected to the second countersunk hole 103 , and the nut of the screw rod 4 is sunk into the second countersunk hole 103 .
[0039] The screw rod 4 is inserted into the pin rod 1 from the end opening of the pin rod 1. The nut diameter of the screw rod 4 is larger than the rod diameter of the screw rod 4. A second countersunk hole 103 is set at the end opening of the pin rod 1. The second countersunk hole 103 can accommodate the nut of the screw rod 4. At the same time, the second countersunk hole 103 also facilitates the installation of the ball 7 in the net shrinkage through hole 3.
[0040] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims. The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and are not described here one by one.
Claims
1. A front landing gear down position lock safety pin, characterized in that: include: A pin rod (1), the pin rod (1) being of a cylindrical structure, an annular disk (2) being arranged on the outer side of the root end of the pin rod (1), and a shrinking through hole (3) being arranged on the side wall of the end of the pin rod (1); A screw rod (4), the screw rod (4) is inserted into the pin rod (1), the end of the screw rod (4) is connected with a flange (5), the side wall of the screw rod (4) near the root is provided with an annular groove (6), and the nut of the screw rod (4) blocks the end opening of the pin rod (1); A ball (7), the ball (7) being arranged between the shrinking through hole (3) and the root of the screw rod (4), the diameter of the ball (7) being larger than the minimum diameter of the shrinking through hole (3); A spring (8), wherein the spring (8) is arranged between the flange (5) and the pin rod (1).
2. The front landing gear down position lock safety pin according to claim 1, characterized in that: A locking ring (9) and a warning red flag (10) are mounted on the annular disk (2).
3. The front landing gear down position lock safety pin according to claim 1, characterized in that: The root end of the pin rod (1) is provided with a large step shaft section (101).
4. The front landing gear down position lock safety pin according to claim 3, characterized in that: A first countersunk hole (102) is provided in the port of the large-step shaft section (101), and the spring (8) extends into the first countersunk hole (102).
5. The front landing gear down position lock safety pin according to claim 3, characterized in that: A second countersunk hole (103) is provided in the port at the end of the pin rod (1), the shrinkage through hole (3) is connected to the second countersunk hole (103), and the nut of the screw rod (4) is sunk into the second countersunk hole (103).