Tow pin and towing apparatus

Abstract

The utility model discloses a kind of traction pin and traction equipment, belong to aircraft traction technical field.This kind of traction pin includes limiting section, transition section and cooperation section in turn from top to bottom, limiting section outer diameter is matched with the mounting hole of traction support upper opening, limiting section bottom end is fixedly connected with transition section, transition section is set as taper table and radius gradually decreases from top to bottom, transition section is fixedly connected with cooperation section top end, cooperation section and its cooperation traction lifting ring adaptation, in the utility model, when needing to tow aircraft body, traction pin is inserted on traction support, and traction lifting ring is sleeved on cooperation section, and limiting section is connected with traction support limiting connection by limiting section, so as to adapt traction pin and traction lifting ring, without again purchasing special traction vehicle to avoid generating high cost.

Description

Technical Field

[0001] This utility model relates to the field of aircraft traction technology, specifically to a traction pin and traction device. Background Technology

[0002] When towing an aircraft, it is usually necessary to insert the towing pin into the towing support at the rear of the towing vehicle and put the towing ring on the towing pin. The towing vehicle then tows the aircraft body to the rear of the towing ring.

[0003] The Citation M2 is a light business jet, highly sought after in the light jet market for its efficient performance, luxurious interior, advanced avionics, and excellent short takeoff and landing capabilities. It is also a mainstream medium-sized training aircraft for general aviation training units both domestically and internationally. After a domestic general aviation training unit introduced the Citation M2, it discovered that the M2's dedicated TRONAIR tow bar shackles were incompatible with the tow pins in its existing domestically produced CMA CGM TK-QY200 tow truck, preventing the tow bar from being properly mounted on the tow block. This resulted in uneven stress on the contact surfaces between the tow pin and the shackle during towing, easily causing shackle wear, tow bar misalignment, and even tow bar breakage or damage to the aircraft structure. Therefore, to ensure a stable and reliable connection between the TRONAIR tow bar and the CMA CGM tow truck, while saving the high cost of purchasing a dedicated tow truck, a dedicated tow pin matching the TRONAIR tow bar shackle size was needed. Utility Model Content

[0004] The purpose of this utility model is to overcome the problems in the prior art and provide a traction pin and traction device that enables the traction pin, traction ring and traction vehicle body to be mutually compatible and connected.

[0005] This utility model provides a traction pin and a traction device. The traction pin includes a limiting section, a transition section and a mating section from top to bottom. The outer diameter of the limiting section matches the mounting hole opened on the traction support. The limiting section is fixedly connected to the transition section. The transition section is set as a truncated cone with the radius gradually decreasing from top to bottom. The transition section is fixedly connected to the top of the mating section. The outer diameter of the mating section is adapted to the inner diameter of the traction ring it mates with.

[0006] Preferably, the limiting segment and the transition segment are integrally formed, and the transition segment and the mating segment are integrally formed.

[0007] Preferably, the adapter bushing is interference-fitted with the bottom mounting hole of the traction support, and the adapter bushing is interference-fitted with the mating section.

[0008] Preferably, the adapter bushing includes a first limiting boss and a limiting tube. The outer diameter of the limiting tube is interference-fitted with the inner diameter of the bottom mounting hole of the traction support. The outer diameter of the first limiting boss is larger than the inner diameter of the bottom mounting hole of the traction support. A through-hole is provided on the first limiting boss. The bottom end of the mating section is inserted into the through-hole. The inner diameter of the through-hole is the same as the inner diameter of the limiting tube.

[0009] Preferably, the limiting segment includes a second limiting boss and a connecting post, the bottom of the second limiting boss is fixedly connected to the transition segment, and the connecting post is fixedly connected to the top of the second limiting boss.

[0010] Preferably, the traction ring and the mating section have a 1 / 4-inch gap after mating.

[0011] Preferably, a lifting ring is fixedly connected to the top of the connecting column.

[0012] Preferably, an anti-detachment chain is welded at the connection between the lifting ring and the connecting post, and the end of the anti-detachment chain is provided with a locking hook.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: When towing an aircraft fuselage, the towing pin of this utility model is inserted into the towing support, and the towing ring is sleeved on the mating section. The towing pin and the towing support are limited and connected by the limiting section. The mating section is cut to fit the towing ring and the two meet a gap of 1 / 4 inch (about 5 mm). This avoids wear of the ring and displacement of the towing rod, which could lead to breakage of the towing rod or damage to the aircraft structure. Moreover, it eliminates the need to purchase a special towing vehicle, thus avoiding high costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the traction ring, traction pin, and traction vehicle assembly structure of this utility model.

[0015] Figure 2 This is a first-view structural diagram of the traction pin of this utility model.

[0016] Figure 3 This is a schematic diagram of the overall structure of the traction pin of this utility model from a second perspective.

[0017] Figure 4 This is a schematic diagram of the rotating bushing structure of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Traction pin; 11. Limiting section; 111. Second limiting boss; 112. Connecting post; 12. Transition section; 13. Mating section; 2. Adapter bushing; 21. First limiting boss; 22. Limiting tube; 3. Lifting ring; 4. Anti-derailment chain. Detailed Implementation

[0019] The following is in conjunction with the appendix Figures 1-4 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, not all, of the embodiments of this utility model. Based on the described 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. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0020] The terms "first," "second," and similar words used in this utility model patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Words such as "comprising" or "including" indicate that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," "lower," "far," "near," "front," and "rear" are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The drawings in this utility model are not strictly drawn to scale; the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this utility model are merely structural schematic diagrams.

[0021] This utility model provides a traction pin and traction device, such as Figures 1-3 As shown, the traction pin 1 includes a limiting section 11, a transition section 12, and a mating section 13 from top to bottom. The outer diameter of the limiting section 11 matches the mounting hole on the traction support. The limiting section 11 is fixedly connected to the transition section 12. The transition section 12 is set as a truncated cone with the radius gradually decreasing from top to bottom. The transition section 12 is fixedly connected to the top of the mating section 13. The outer diameter of the mating section 13 is adapted to the inner diameter of the traction ring it mates with. After the traction ring mates with the mating section 13, there is a 1 / 4-inch gap.

[0022] In this embodiment, the Citation M2, for example, is a light business jet. With its high performance, luxurious interior, advanced avionics system, and excellent short takeoff and landing capabilities, it has become a highly sought-after model in the light jet market and is also a mainstream medium-sized training aircraft for general aviation training units both domestically and internationally. After a domestic general aviation training unit introduced the Citation M2, it discovered that the M2's dedicated TRONAIR tow bar (model 01-1101-0000) shackles could not be fitted with the existing domestically produced CMA CGM TK-QY200 tow truck, preventing the aircraft from being towed normally.

[0023] TRONAIR tow bar is an imported towing device specifically designed for Citation series aircraft. The inner diameter of the shackle that connects to the towing support on the towing vehicle is 55mm. However, the towing pin 1 originally equipped on the Dahang TK-QY200 towing vehicle has a diameter of 65mm, which exceeds the inner diameter of the towing shackle assembly, making it impossible to assemble the towing pin 1 onto the towing support.

[0024] In this invention, when towing an aircraft fuselage is required, the towing pin 1 is inserted into the towing support, and the towing ring is fitted onto the mating section 13. The towing pin 1 and the towing support are connected by the limiting section 11, thereby adapting the towing pin 1 and the towing ring. This eliminates the need to purchase a dedicated towing vehicle, avoiding high costs. A tapered retraction machining process is adopted to reduce the risk of fatigue fracture of the towing pin 1 during service. The outer diameter of the mating section 13 is set to 50mm, and the inner diameter of the towing ring is 55mm. After mating, there is a 1 / 4-inch gap between the two, which meets the towing ring mating requirements in the TRONAIR towing bar manual. It is compatible with the Dahang TK-QY200 towing vehicle and TRONAIR towing bars without modifying the original vehicle structure. In this embodiment, the towing support is horizontally arranged with three layers of mounting plates from top to bottom. Each of the three mounting plates has mounting holes, and the axes of the mounting holes on the three mounting plates coincide.

[0025] Preferred, such as Figures 1-3 As shown, the limiting section 11 and the transition section 12 are integrally formed, and the transition section 12 and the mating section 13 are integrally formed.

[0026] In this embodiment, the limiting section 11 and the transition section 12 are integrally formed, and the transition section 12 and the mating section 13 are integrally formed, which increases the overall stability of the traction pin 1 and prevents the traction pin 1 from breaking during traction.

[0027] Preferred, such as Figures 1-4 As shown, the adapter bushing 2 is interference-fitted with the bottom mounting hole of the traction support, and the adapter bushing 2 is interference-fitted with the mating section 13. The adapter bushing 2 includes a first limiting boss 21 and a limiting tube 22. The outer diameter of the limiting tube 22 is interference-fitted with the inner diameter of the bottom mounting hole of the traction support. The outer diameter of the first limiting boss 21 is larger than the inner diameter of the bottom mounting hole of the traction support. A through insertion hole is provided on the first limiting boss 21. The bottom end of the mating section 13 is inserted into the through insertion hole. The inner diameter of the through insertion hole is the same as the inner diameter of the limiting tube 22.

[0028] In this embodiment, the limiting tube 22 is interference-fitted with the mounting hole at the bottom of the traction support, and the first limiting boss 21 is tightly fitted with the traction support. The mating section 13 is fitted into the first limiting boss 21, and the adapter bushing 2 is fitted with the traction support, thereby eliminating the problem of excessive gap between the traction pin 1 and the traction support, and to a certain extent avoiding the impact load that the traction pin 1 may bear during the traction process.

[0029] Preferred, such as Figures 1-3 As shown, the limiting segment 11 includes a second limiting boss 111 and a connecting post 112. The bottom of the second limiting boss 111 is fixedly connected to the transition segment 12, and the connecting post 112 is fixedly connected to the top of the second limiting boss 111.

[0030] In this embodiment, the second limiting boss 111 can ensure that the traction pin 1 is in the correct assembly position, and at the same time, it can effectively cooperate with the anti-disengagement device on the traction support to prevent the traction pin 1 from shaking during traction and affecting the traction work.

[0031] Preferred, such as Figure 2 As shown, a lifting ring 3 is fixedly connected to the top of the connecting post 112. An anti-detachment chain 4 is welded at the connection between the lifting ring 3 and the connecting post 112. A locking hook is provided at the end of the anti-detachment chain 4.

[0032] The lifting ring 3 located at the top of the connecting column 112 facilitates the insertion and removal of the towing pin 1 during towing operations. The anti-derailment chain 4 facilitates the locking of the towing pin 1 and the towing support to the towing vehicle body after installation, thereby enhancing the stability of the towing pin 1 and improving the stability of the towing operation.

[0033] The following is a method of using a traction pin and traction device according to this utility model:

[0034] First, insert the limiting tube 22 into the mounting hole at the bottom of the traction support of the Dahang tractor. Then, put the traction ring on the mating section 13 and place it above the first limiting boss 21, ensuring that the traction ring and the first limiting boss 21 are coaxial. Insert the traction pin 1 vertically from above the traction support until the lower end of the mating section 13 passes through the traction ring and is inserted into the limiting tube 22 through the through hole to match the limiting tube 22. Lock the second limiting boss 111 on the upper part of the traction support. Lock the anti-derailment chain 4 hook set on the top of the connecting column 112 to the tractor body to complete the installation and connection of the traction ring, traction pin 1 and traction support on the tractor body.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A traction pin, characterized in that, The traction pin (1) includes a limiting section (11), a transition section (12) and a mating section (13) from top to bottom. The outer diameter of the limiting section (11) matches the mounting hole on the traction support. The limiting section (11) is fixedly connected to the transition section (12). The transition section (12) is set as a truncated cone with the radius gradually decreasing from top to bottom. The transition section (12) is fixedly connected to the top of the mating section (13). The outer diameter of the mating section (13) is adapted to the inner diameter of the traction ring it mates with.

2. A traction pin as described in claim 1, characterized in that, The limiting section (11) and the transition section (12) are integrally formed, and the transition section (12) and the mating section (13) are integrally formed.

3. A traction pin as described in claim 1, characterized in that, The adapter bushing (2) is interference-fitted with the bottom mounting hole of the traction support, and the adapter bushing (2) is interference-fitted with the mating section (13).

4. A traction pin as described in claim 3, characterized in that, The adapter bushing (2) includes a first limiting boss (21) and a limiting tube (22). The outer diameter of the limiting tube (22) is interference-fitted with the inner diameter of the bottom mounting hole of the traction support. The outer diameter of the first limiting boss (21) is larger than the inner diameter of the bottom mounting hole of the traction support. A through-hole is provided on the first limiting boss (21). The bottom end of the mating section (13) is inserted into the through-hole. The inner diameter of the through-hole is the same as the inner diameter of the limiting tube (22).

5. A traction pin as described in claim 1, characterized in that, The limiting section (11) includes a second limiting boss (111) and a connecting post (112). The bottom of the second limiting boss (111) is fixedly connected to the transition section (12), and the connecting post (112) is fixedly connected to the top of the second limiting boss (111).

6. A traction pin as described in claim 1, characterized in that, The traction ring has a 1 / 4-inch gap with the mating section (13).

7. A traction pin as described in claim 5, characterized in that, A lifting ring (3) is fixedly connected to the top of the connecting column (112).

8. A traction pin as described in claim 7, characterized in that, An anti-detachment chain (4) is welded at the connection between the lifting ring (3) and the connecting post (112), and a locking hook is provided at the end of the anti-detachment chain (4).

9. A traction device, characterized in that, Includes a traction pin as described in any one of claims 1-7.

Images