Trolley for disassembling and assembling inner cylinder of 737NG aircraft landing gear

Abstract

The utility model discloses a 737NG aircraft landing gear inner cylinder disassembling and assembling trolley which comprises a frame, a first hoop assembly, a front fixing pipe, a second hoop assembly, a connecting rod and a hand-cranking lead screw sliding table, the front fixing pipe is used for transversely penetrating through a front shaft hole of an inner cylinder, and the first hoop assembly and the second hoop assembly are fixedly arranged on the frame. The first hoop assembly is used for fixing a wheel shaft of an inner cylinder, the second hoop assembly is used for fixing a front fixing pipe, the hand-cranking lead screw sliding table is arranged on the frame, one end of the connecting rod is hinged to a sliding block of the hand-cranking lead screw sliding table, and a connecting piece is arranged at the other end of the connecting rod and used for being connected with the middle of the front fixing pipe. The undercarriage inner cylinder dismounting device can help a worker to better dismount an inner cylinder of an undercarriage, and has the function of storing the inner cylinder.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of aircraft landing gear inner tube dismounting tooling, especially a 737NG aircraft landing gear inner tube dismounting trolley. BACKGROUND

[0002] The landing gear of the 737NG aircraft is single-wheel shaft, and in the process of dismounting the inner tube of the landing gear, the aircraft needs to be jacked up as a whole, and after the aircraft obtains enough space in the height direction, the inner tube and the outer tube of the main landing gear of the aircraft are completely separated. In the process of separating the inner tube and the outer tube, the inner tube needs to be slowly lowered until completely separated from the outer tube and finally dismounted. Figure 8 As shown in Fig. 1, it is a structural diagram of the inner tube 9 of the 737NG aircraft landing gear, and the lower end of the inner tube 9 is provided with a horizontal wheel shaft 9.1 on both sides, and the front of the lower end is provided with a front shaft hole 9.2 on both sides.

[0003] The weight of the inner tube of the 737NG aircraft landing gear is large (about 145 kg), and there is no special tool and bracket for hoisting the inner tube during dismounting. In the process of separating the inner tube and the outer tube, the inner tube is not completely perpendicular to the ground, and the wheel shaft jack cannot be directly used to vertically lower or jack up the inner tube, and the inner tube needs to be adjusted at an inclined angle while being lowered or jacked up. The whole dismounting process is time-consuming and laborious, and there is a high safety risk to personnel and equipment due to the large weight of the inner tube. In addition, after the inner tube of the landing gear is dismounted, there is no suitable fixing storage rack, which causes difficulty in related maintenance work. SUMMARY

[0004] The utility model aims at providing a 737NG aircraft landing gear inner tube dismounting trolley, which can help the staff to better dismount the inner tube of the landing gear and has the function of storing the inner tube.

[0005] The utility model is realized by the following technical scheme:

[0006] A 737NG aircraft landing gear inner tube dismounting trolley, characterized by comprising a frame, a first hoop assembly, a front fixed tube, a second hoop assembly, a connecting rod and a hand-operated screw rod sliding table, the front fixed tube is used for being transversely inserted into the front shaft hole of the inner tube, the first hoop assembly and the second hoop assembly are fixedly arranged on the upper surface of the frame, the first hoop assembly is used for fixing the wheel shaft of the inner tube, the second hoop assembly is used for fixing the front fixed tube, the hand-operated screw rod sliding table is arranged on the frame, one end of the connecting rod is hinged to the sliding block of the hand-operated screw rod sliding table, the other end of the connecting rod is provided with a connecting piece, and the connecting piece is used for being connected with the middle part of the front fixed tube.

[0007] The further technical scheme of the utility model discloses: the position of first hoop assembly is close to the rear end of the vehicle frame, the hand-operated screw rod sliding table is arranged at the front end of the vehicle frame, and the second hoop assembly is arranged between the first hoop assembly and the hand-operated screw rod sliding table.

[0008] The further technical scheme of the utility model discloses: the first hoop assembly includes two first hoops arranged at the two side edges of the vehicle frame, the second hoop assembly includes two second hoops arranged at the two side edges of the vehicle frame, the structure of the first hoop and the second hoop is same, only the size of the first hoop is matched with the wheel shaft of the inner cylinder, and the size of the second hoop is matched with the front fixed pipe, the first hoop and the second hoop all include a supporting seat, a semicircular buckling plate and a first connecting bolt, the supporting seat is fixed on the top of the vehicle frame, the supporting seat is provided with a semicircular groove with an opening facing upwards, one end of the semicircular buckling plate is hinged to one end of the supporting seat, and the other end of the semicircular buckling plate is connected to the other end of the supporting seat through the first connecting bolt.

[0009] The further technical scheme of the utility model discloses: the connecting piece includes a third hoop, the third hoop includes two semicircular clamping plates and a second connecting bolt, one of the semicircular clamping plates is fixedly connected to the connecting rod, one end of the two semicircular clamping plates is hinged, and the other end is connected through the second connecting bolt.

[0010] The further technical scheme of the utility model discloses: the top of the vehicle frame is provided with a recess close to the front end, the hand-operated screw rod sliding table is arranged on the bottom surface of the recess, and the hand wheel of the hand-operated screw rod sliding table is located at the front end outside of the vehicle frame.

[0011] The further technical scheme of the utility model discloses: the hand-operated screw rod sliding table includes a base, a sliding block, a screw rod and a hand wheel, the base is horizontally fixed on the bottom surface of the recess, the screw rod is rotatably arranged on the top of the base, one end of the screw rod penetrates out to the front end outside of the vehicle frame, the hand wheel is installed at the end of the screw rod penetrating out to the outside, the sliding block is slidably installed on the top of the base, and the screw rod is threadedly connected with the threaded hole at the bottom of the sliding block.

[0012] The further technical scheme of the utility model discloses: the bottom surface of the recess is provided with a drain hole.

[0013] The further technical scheme of the utility model discloses: the bottom of the vehicle frame is provided with a wheel and a height raising device.

[0014] The further technical scheme of the utility model discloses: the rear end of the vehicle frame is provided with a hand pushing rod.

[0015] The further technical scheme of the utility model discloses: the inner side of the first hoop and the second hoop is provided with a rubber lining.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model discloses when disassembling the inner tube, through the first hoop subassembly to the wheel axle of inner tube is fixed, the front fixed pipe is transversely worn in the front axle hole of inner tube, and then can be adjusted the angle of inner tube through hand screw rod sliding table, help staff better to the inner tube of landing gear and disassemble.In the inner tube is disassembled down, can be adjusted the angle of inner tube through hand screw rod sliding table, make the front fixed pipe move to the second hoop subassembly, through the second hoop subassembly and fix the front fixed pipe, make the inner tube of disassembling down be stably fixed on the trolley, at this moment, the trolley is used as the storage rack of inner tube, and the inner tube can be fixed on the trolley for a long time, and staff can change the packing ring and other related maintenance work of the inner tube fixed on the trolley.

[0018] It can be seen that the utility model not only can be used as the dismounting tool of 737NG aircraft landing gear inner tube, but also has the function of storing the inner tube. It is safe and reliable to use, does not need manpower to lift in the dismounting process, can greatly reduce the demand of manpower and the safety risk of manpower lifting of the inner tube in the dismounting process, and two persons can operate in the whole dismounting process. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the three-dimensional schematic view of the 737NG aircraft landing gear inner tube dismounting trolley of the utility model embodiment;

[0020] Figure 2 It is the three-dimensional schematic view of the first hoop, the second hoop and the third hoop of the 737NG aircraft landing gear inner tube dismounting trolley of the utility model embodiment when opening;

[0021] Figure 3 It is the second three-dimensional schematic view of the 737NG aircraft landing gear inner tube dismounting trolley of the utility model embodiment;

[0022] Figure 4 It is the overhead schematic view of the 737NG aircraft landing gear inner tube dismounting trolley of the utility model embodiment;

[0023] Figure 5 It is the structure schematic view of the hand screw rod sliding table of the utility model embodiment;

[0024] Figure 6 It is the schematic view when the wheel axle of inner tube is fixed on the 737NG aircraft landing gear inner tube dismounting trolley of the utility model embodiment, but the front fixed pipe has not been fixed on the second hoop yet;

[0025] Figure 7 It is the structure schematic view when the inner tube is completely fixed on the 737NG aircraft landing gear inner tube dismounting trolley of the utility model embodiment;

[0026] Figure 8is a structure diagram of a 737NG airplane landing gear inner tube.

[0027] The meaning of the reference signs in the drawings is as follows:

[0028] 1-frame; 1.1-wheel; 1.2-hand push rod; 1.3-groove; 1.4-drain hole; 2-second hoop; 3-first hoop; 3.1-support seat; 3.2-semi-circular clamping plate; 3.3-first connecting bolt; 3.4-rubber lining; 4-third hoop; 4.1-semi-circular clamping plate; 4.2-second connecting bolt; 5-connecting rod; 6-hand screw sliding table; 6.1-hand wheel; 6.2-base; 6.3-screw rod; 6.4-sliding rail; 6.5-sliding block; 6.6-hinge lug; 7-front fixed pipe; 8-top elevator; 9-inner tube; 9.1-wheel shaft; 9.2-front shaft hole. DETAILED DESCRIPTION

[0029] The utility model is further described below in combination with the embodiments.

[0030] In the description of the utility model, it needs to be understood that the orientation description, such as the orientation or position relationship of indication, for example, upper, lower, front, rear, left, right, etc. based on the orientation or position relationship shown in the drawings, is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as a limitation on the utility model.

[0031] In the description of the utility model, the meaning of several is one or more, and the meaning of multiple is two or more, and greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If the first, the second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0032] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0033] Embodiment:

[0034] As Figures 1 to 5 shown is the 737NG airplane landing gear inner tube dismounting trolley of the embodiment, which comprises a frame 1, a first hoop assembly, a front fixed pipe 7, a second hoop assembly, a connecting rod 5 and a hand screw sliding table 6.

[0035] The frame 1 is welded by rectangular tubes with specifications of 120x80x3MM, and a 4MM thick punched steel plate is laid on the frame. The surface of the steel plate is mechanically derusted and then sprayed with yellow paint with color number RAL1003. The steel plate and the frame are riveted with stainless steel rivets with specifications of 6MM. The rear end of the frame 1 is provided with a hand push rod 1.2 made of a φ30x2.5MM round steel tube.

[0036] The first and second hoop assemblies are fixed on the upper surface of the frame 1 respectively. The first hoop assembly is located close to the rear end of the frame, and the hand-operated screw rod sliding table 6 is arranged at the front end of the frame 1. The second hoop assembly is located between the first hoop assembly and the hand-operated screw rod sliding table 6. The front fixed tube 7 is an aluminum tube with an outer diameter of φ2.4 inches and a thickness of 5MM. The front fixed tube 7 is arranged transversely between the first hoop assembly and the hand-operated screw rod sliding table 6, and is used to be transversely inserted into the front shaft hole of the inner cylinder during use.

[0037] The first hoop assembly is used to fix the wheel shaft 9.1 of the inner cylinder 9, and the second hoop assembly is used to fix the front fixed tube 7. The first hoop assembly of the embodiment includes two first hoops 3 arranged on the two side edges of the frame 1, and the second hoop assembly includes two second hoops 2 arranged on the two side edges of the frame 1. The first hoop 3 and the second hoop 2 have the same structure, except that the size of the first hoop 3 is adapted to the wheel shaft 9.1 of the inner cylinder 9, and the size of the second hoop 2 is adapted to the front fixed tube 7.

[0038] The first hoop 3 and the second hoop 2 each include a support seat 3.1, a semicircular clamping plate 3.2, and a first connecting bolt 3.3. The support seat 3.1 is fixed on the upper surface of the frame 1, and a semicircular groove with an upward opening is arranged on the support seat 3.1. The semicircular clamping plate 3.2 is arranged on the upper surface of the support seat 3.1, and one end of the semicircular clamping plate 3.2 is hingedly connected to one end of the support seat 3.1. The other end of the semicircular clamping plate 3.2 and the other end of the support seat 3.1 are connected by the first connecting bolt 3.3, and a circular hole is formed between the semicircular clamping plate 3.2 and the support seat 3.1. The inner diameter of the circular hole formed in the first hoop 3 is 5.10 inches, which is adapted to the diameter of the wheel shaft 9.1 of the inner cylinder 9. During use, the wheel shaft 9.1 of the inner cylinder 9 is fixed in the circular hole of the first hoop. The diameter of the circular hole formed in the second hoop 2 is 2.4 inches, which is adapted to the diameter of the front fixed tube 7. During use, the front fixed tube is fixed in the circular hole of the second hoop 2.

[0039] As Figure 1 and Figure 5As shown, the upper part of the frame 1 is provided with a recess 1.3 near the front end, the hand screw sliding table 6 includes a base 6.2, a sliding block 6.5, a lead screw 6.3 and a hand wheel 6.1, the base 6.2 is horizontally fixed on the bottom surface of the recess 1.3, the lead screw 6.3 is rotatably arranged on the upper surface of the base 6.2, one end of the lead screw 6.3 penetrates out to the outside of the front end of the frame 1, the hand wheel 6.1 is installed on the end of the lead screw 6.3 penetrating out to the outside, the sliding block 6.5 is slidingly installed on the sliding rail 6.4 on the upper surface of the base 6.2, and the lead screw 6.3 is threadedly connected with the threaded hole in the bottom of the sliding block 6.5. During use, the lead screw 6.3 can be driven to rotate by manually rotating the hand wheel 6.1, so as to drive the sliding block 6.5 to slide.

[0040] As shown, Figure 4 the bottom surface of the recess 1.3 is provided with a drainage hole 1.4 at each corner, so that water accumulation in the recess 1.3 can be avoided through the drainage hole 1.4.

[0041] The upper surface of the sliding block 6.5 is provided with a hinged lug 6.6, one end of the connecting rod 5 is hingedly connected with the hinged lug 6.6 on the upper surface of the sliding block 6.5 through a pin shaft, and the other end of the connecting rod 5 is provided with a connecting piece for connecting with the middle part of the front fixed pipe.

[0042] The connecting piece of the embodiment includes a third clamp 4, the third clamp 4 includes two semicircular clamping plates 4.1 and a second connecting bolt 4.2, one of the two semicircular clamping plates 4.1 is fixedly connected with the connecting rod 5, the two semicircular clamping plates 4.1 are hingedly connected at one end and are connected at the other end through the second connecting bolt 4.2.

[0043] The embodiment is provided with a rubber lining 3.4 on the inner side of the first clamp 3 and the second clamp 2, that is, the rubber lining 3.4 is arranged on the inner side of the semicircular clamping plate 3.2 and the support seat 3.1, and the thickness of the rubber lining 3.4 is 5MM.

[0044] The use process of the 737NG aircraft landing gear inner tube dismounting trolley of the embodiment is as follows:

[0045] a. The trolley 1 is pushed to the lower side of the landing gear, the wheel shafts 9.1 on both sides of the inner tube 9 of the landing gear are respectively fixed on the first clamps 3 on both sides, and the wheel shafts 9.1 can rotate in the first clamps 3;

[0046] b. The front fixed pipe 7 is transversely penetrated in the front shaft hole 9.2 of the inner tube 9, the third clamp 4 on the connecting rod 5 is connected with the middle part of the front fixed pipe 7, so as to connect the front fixed pipe 7 with the hand screw sliding table 6; at this time, as shown, Figure 6 the front fixed pipe 7 has not been fixed on the second clamp 2, and the front fixed pipe 7 is still movable;

[0047] c. Lift the aircraft and simultaneously adjust the pitch angle of the inner cylinder 9 by hand-cranking the lead screw slide 6 until the inner cylinder 9 is detached from the outer cylinder of the aircraft landing gear.

[0048] d. After the inner cylinder 9 detaches from the outer cylinder of the aircraft landing gear, adjust the pitch angle of the inner cylinder 9 by hand-cranking the screw slide 6 so that both ends of the front fixing tube 7 sit on the second clamp 2. Then, fasten the second clamp 2 to complete the fixing of the front fixing tube 7. After the front fixing tube 7 is fixed, the inner cylinder 9 is also stably fixed on the trolley. At this time, as... Figure 7 As shown;

[0049] e. Move the trolley 1 together with the inner cylinder 9 to the desired parking position, operate the jack 8 so that the jack 8 touches the ground, and fix the trolley to prevent accidental movement.

[0050] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A 737NG landing gear inner barrel removal cart, characterized by: The utility model provides a vehicle frame, first hoop assembly, front fixed tube, second hoop assembly, connecting rod and hand screw rod sliding table, the front fixed tube is used for being transversely worn in the front axle hole of inner cylinder, the first hoop assembly and the second hoop assembly are fixed on the upper surface of the vehicle frame, the first hoop assembly is used for fixing the wheel axle of inner cylinder, the second hoop assembly is used for fixing the front fixed tube, the hand screw rod sliding table is arranged on the vehicle frame, one end of the connecting rod is hinged with the sliding block of hand screw rod sliding table, the other end of the connecting rod is equipped with connecting piece, and the connecting piece is used for being connected with the middle part of the front fixed tube.

2. The 737NG aircraft landing gear inner barrel disassembly cart of claim 1, wherein: The first hoop assembly is close to the rear end of the vehicle frame, the hand screw rod sliding table is arranged on the front end of the vehicle frame, and the second hoop assembly is arranged between the first hoop assembly and the hand screw rod sliding table.

3. The 737NG aircraft landing gear inner barrel disassembly cart of claim 1, wherein: The first hoop assembly includes two first hoops arranged on the two side edges of the vehicle frame, and the second hoop assembly includes two second hoops arranged on the two side edges of the vehicle frame, the first hoop and the second hoop are the same in structure, only the size of the first hoop is matched with the wheel axle of the inner cylinder, and the size of the second hoop is matched with the front fixed tube; the first hoop and the second hoop each include a support seat, a semicircular buckle plate and a first connecting bolt, the support seat is fixed on the upper surface of the vehicle frame, the support seat is provided with a semicircular groove with an upward opening, one end of the semicircular buckle plate is hinged with one end of the support seat, and the other end of the semicircular buckle plate and the other end of the support seat are connected through the first connecting bolt.

4. The 737NG landing gear inner barrel dolly of claim 1, wherein: The connecting piece includes a third hoop, the third hoop includes two semicircular clamping plates and a second connecting bolt, one of the semicircular clamping plates is fixedly connected to the connecting rod, one end of the two semicircular clamping plates is hinged, and the other end is connected through the second connecting bolt.

5. The 737NG aircraft landing gear inner barrel disassembly cart of claim 1, wherein: The upper surface of the vehicle frame is provided with a groove close to the front end, the hand screw rod sliding table is arranged on the bottom surface of the groove, and the hand wheel of the hand screw rod sliding table is located outside the front end of the vehicle frame.

6. The 737NG aircraft landing gear inner barrel disassembly cart of claim 5, wherein: The hand screw rod sliding table includes a base, a sliding block, a screw rod and a hand wheel, the base is horizontally fixed on the bottom surface of the groove, the screw rod is rotatably arranged on the upper surface of the base, one end of the screw rod penetrates out to the outside of the front end of the vehicle frame, the hand wheel is installed on the end of the screw rod penetrating out to the outside, the sliding block is slidingly installed on the upper surface of the base, and the screw rod is threadedly connected with the threaded hole in the bottom of the sliding block.

7. The 737NG aircraft landing gear inner barrel disassembly cart of claim 5, wherein: The bottom surface of the groove is provided with a drain hole.

8. The 737NG aircraft landing gear inner barrel disassembly cart of claim 1, wherein: The bottom of the vehicle frame is provided with wheels and a height adjuster.

9. The 737NG aircraft landing gear inner barrel disassembly cart of claim 1, wherein: The rear end of the vehicle frame is provided with a hand pushing rod.

10. The 737NG aircraft landing gear inner barrel disassembly cart of claim 3, wherein: The inner sides of the first hoop and the second hoop are each provided with a rubber lining.

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