CN201799837U - Undercarriage installing trolley - Google Patents

Abstract

A landing gear installation trolley, which includes: an underframe, a vertical support, a support frame, a hydraulic loading system, a bottom surface adjustment device and a hoop; wherein, the vertical support is fixedly connected to one end of the underframe; one end of the support frame is hinged on The top of the vertical bracket; the hydraulic loading system can make the support frame rotate around the top of the vertical bracket; the hoop is connected to the free end of the support frame to fix the landing gear to be installed; and the bottom adjustment device is installed on the bottom On the frame, it is used to adjust the support plane of the landing gear installation trolley relative to the ground. The posture of the landing gear to be installed can be conveniently adjusted through the trolley, which greatly simplifies the original complicated adjustment process and greatly improves the installation efficiency of the landing gear.

Description

Landing gear installation trolley

technical field

The utility model relates to landing gear installation equipment in aircraft assembly, in particular to a landing gear installation trolley. the

Background technique

During the final assembly of the aircraft, the aircraft landing gear needs to be installed on the fuselage. The process is to first move the landing gear to the lower part of the fuselage to be installed, then lift the landing gear as a whole, and adjust its position relative to the fuselage. After it enters the correct installation position, it is finally connected and fixed. the

Typically, this installation process is done with special equipment provided by the landing gear supplier. Conventional landing gear mounting equipment is often very complex, including several adjustment handles. During installation, after the landing gear is fixed on the installation device, the attitude of the landing gear relative to the fuselage is adjusted by turning the adjustment handles respectively, and finally the landing gear enters the installation position to complete the installation. the

Since the installation device includes a plurality of independent adjustment handles, each handle can only be turned separately during operation, so the operation is very inconvenient, the adjustment is very laborious, and the work efficiency is very low, which cannot meet the actual needs of on-site installation. the

Utility model content

The utility model proposes an improved landing gear installation device. Compared with the traditional landing gear installation device, it no longer has a complicated rotary handle adjustment device. The position of the body can be adjusted easily and flexibly. the

Specifically, the utility model proposes a landing gear installation trolley, which includes: an underframe, a vertical support, a support frame, a hydraulic loading system, a bottom surface adjustment device and a hoop; wherein the vertical support is fixedly connected to the One end of the underframe; one end of the support frame is hinged on the top of the vertical support; the hydraulic loading system can make the support frame rotate around the top of the vertical support; the hoop is connected to the The free end of the support frame is used to fix the landing gear to be installed; and the bottom surface adjustment device is installed on the bottom frame and is used to adjust the support plane of the landing gear installation trolley relative to the ground. the

Optionally, the landing gear installation trolley may also include a tie rod, one end of which is hinged to the lower end of the support frame, and the other end is connected to the landing gear to be installed, for adjusting the attitude of the landing gear. the

Optionally, the underframe of the trolley for installing the landing gear includes a bottom beam and a cross bar, which form a "cross" structure, thereby providing a stable bottom surface support for the entire trolley. the

Optionally, the underframe of the undercarriage installation trolley can include front wheels and paired rear wheels, which are respectively installed on the front end of the bottom beam and the left and right ends of the crossbar, so that the trolley can be easily moved to the desired installation position. the

Optionally, the bottom surface adjustment devices of the landing gear installation trolley can be arranged in pairs, respectively located on the left and right sides of the cross bar, and fixed on the bottom beam, and the entire landing gear installation trolley can be adjusted by adjusting each bottom surface adjustment device respectively. The supporting plane of the ground. the

Optionally, the bottom surface adjustment device of the landing gear installation trolley includes a support foot, a threaded sleeve, a threaded rod and a handle, wherein the threaded sleeve is fixedly connected to the bottom beam, the threaded rod cooperates with it in the threaded sleeve, and the handle and the support foot are respectively installed on The upper and lower ends of the threaded rod can drive the threaded rod to rotate in the threaded casing by rotating the handle, so as to realize the up and down movement of the threaded rod and complete the determination of the supporting plane. the

Optionally, the vertical support of the landing gear installation trolley includes a straight bar and a pair of diagonal bars, respectively connected to the rear end of the bottom beam and the left and right ends of the cross bar, thereby providing a very stable vertical support, even in the When subjected to high loads, it can still remain stable without tilting. the

Optionally, the vertical support of the landing gear trolley also includes beams between the pairs of diagonal bars to further increase stability. the

Optionally, the support frame of the landing gear mounting trolley includes a mounting head at its free end, which includes two offset prongs for connecting the hoop between the two prongs. the

Optionally, the hydraulic loading system of the landing gear installation trolley includes a hydraulic control system, pipelines, hydraulic cylinders and hydraulic rods, wherein the hydraulic cylinder is connected to one end of the hydraulic rod, the other end of the hydraulic cylinder is hinged on the vertical support, and the other end of the hydraulic rod One end is hinged at the lower end of the support frame. the

Optionally, one end where the hydraulic cylinder of the landing gear installation trolley is hinged to the vertical support is connected to the beam. the

Optionally, the hinged end of the hydraulic rod of the landing gear installation trolley and the support frame is connected to the bottom end of the longitudinal beam, and is close to the position where the tie rod is connected to the longitudinal beam. the

Optionally, the surface of the hoop of the landing gear installation trolley has a galvanized layer. the

Optionally, the inner surface of the hoop of the landing gear installation trolley includes a rubber gasket, the shape of which is adapted to the shape of the landing gear strut to be installed, so that the landing gear can be firmly fixed. the

The landing gear installation trolley of the utility model adopts a simple connecting rod mechanism and a triangular frame structure, thereby obtaining stable and reliable support, and also adopts a reliable clamping device, so that the landing gear will not shake during the installation process, thereby fully satisfying the meet the needs of on-site installation. the

Description of drawings

In the following detailed description, the following drawings will be often referred to, so that the features and structures of the present utility model can be more clearly understood, wherein:

Figure 1 is a perspective view of a landing gear installation dolly according to a preferred embodiment of the present invention, showing the overall structure of the landing gear installation dolly;

Fig. 2 is the side view of landing gear installation dolly as shown in Fig. 1;

Fig. 3 is the end view of landing gear installation dolly as shown in Fig. 1;

Fig. 4 is the top view of landing gear installation dolly as shown in Fig. 1;

Figure 5 is a schematic diagram of the stressed structure of the landing gear installation trolley as shown in Figure 1, showing the overall stress situation of the landing gear installation trolley;

Fig. 6 is a schematic diagram of the hydraulic loading system of the landing gear installation trolley as shown in Fig. 1;

Figure 7 is a perspective view of the hoop in the landing gear installation dolly as shown in Figure 1;

Figure 8 is a perspective view of the pull rod in the landing gear installation dolly as shown in Figure 1;

Detailed ways

Preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the embodiments disclosed here are only preferred solutions of the present invention, and the utility model can also be implemented in various other forms besides the disclosed ones. the

Perspective views of a landing gear mounting trolley according to a preferred embodiment of the present invention are shown in FIGS. 1-4 . As shown in the figure, the landing gear installation trolley 100 includes an underframe 20 , a vertical support 30 , a support frame 40 , a hydraulic loading system 50 , a bottom surface adjustment device 60 , a tie rod 70 and a hoop 80 . the

Wherein, the underframe 20 forms the chassis of the whole trolley, and is used to move the trolley to the bottom of the fuselage with the landing gear installed, and supports the whole trolley and the landing gear fixed on the trolley. It comprises a sill 21 , a cross bar 22 (shown more clearly in FIG. 3 ), front wheels 23 and a pair of rear wheels 24 . Wherein, the bottom beam 21 and the cross bar 22 all have high rigidity and hardness, for example, are made of steel pipes, and cross to form a "cross", thereby providing firm and stable support for the trolley. At the front end of the bottom beam 21 and the left and right ends of the cross bar 22, a front wheel 23 and a pair of rear wheels 24 are installed respectively to facilitate the movement of the trolley. the

Optionally, the strength of the front wheels 23 can be higher than that of the rear wheels 24, because the front wheels 23, in addition to being used for moving the dolly like the rear wheels 24, will also serve as a support base for the dolly when the undercarriage is installed, which will be described below more clearly explained in the description. the

A bottom surface adjusting device 60 is also installed on the underframe 20, which is used to adjust the bottom surface support surface of the installation trolley 100, and realize that the trolley can always keep stable without moving or tilting during the whole undercarriage installation process. In this embodiment, a pair of symmetrically arranged bottom surface adjustment devices 60 are installed on the bottom frame 20, as shown more clearly in FIG. . the

Specifically, each bottom adjustment device 60 includes a leg 61 , a threaded sleeve 62 , a threaded rod 64 and a handle 63 . Wherein, the threaded sleeve 62 is fixed on the cross bar 22 by means of screws or the like, and its threads extend along the vertical direction. The threaded rod 64 can cooperate with the threaded sleeve 62 and can move up and down in the threaded sleeve 62 by rotation. The support foot 61 is installed on the bottom of the threaded rod 64, and its bottom has a support surface for contacting the ground during installation, thereby supporting the trolley and the landing gear fixed on the trolley on the ground. The top of the threaded rod 64 can be loaded into a horizontally extending handle 63 for the operator to operate, so as to facilitate the adjustment of the support bottom surface of the trolley. the

And except two bottom surface adjusting devices 60, front wheel 23 is also used as a fulcrum of supporting bottom surface. Since any plane can be determined by three points, the supporting bottom surface of the trolley can basically be set completely freely. the

The vertical support 30 is mounted on the chassis 20 near the rear end of the trolley (ie the end opposite to the front wheel 23 ), and forms a firm connection with the chassis 20 . It assumes a roughly vertical posture and extends upwards to provide sufficient height for the installation of the landing gear. Especially as shown in Figure 1, the vertical support 30 in the present embodiment comprises a straight bar 31 and two oblique bars 32, which are respectively connected with the rear end of the bottom beam 21 and the left and right ends of the cross bar 22, thereby forming a tripod structure, thereby providing a very stable vertical support, so that the vertical support 30 can still remain stable without tilting when subjected to a relatively high load. the

Optionally, at the lower part of the two slanting bars 32, another beam 33 can be installed between the two slanting bars, so as to form a roughly "A"-shaped structure. In addition to further improving the stability of the vertical support 30, the beam 33 can also be used for other purposes, which will be explained in the subsequent description. Further optionally, the middle part of the beam 33 can also be connected to the underframe 20 with a connecting rod, which is also an effective method for improving the stability of the vertical support 30 and the firmness of the connection between the underframe 20 and the vertical support 30 . the

A supporting frame 40 is included at the top of the vertical support 30, which is used as a bearing device when the landing gear is installed. Specifically, the support frame 40 includes a longitudinal beam 41, which presents a tubular structure, and one end is hinged to the straight rod 31 of the vertical support 30, and the other end is sleeved with an installation head that can be plugged into the tubular structure of the longitudinal beam 41. 42. In addition, the axial movement of the installation head 42 and the longitudinal beam 41 of the support frame 40 is limited by pins, and the installation head 42 can rotate within a certain range. The installation head 42 may form a generally fork-shaped structure, including two fork heads 43 extending from the sides in an offset manner. Wherein, the longitudinal beam 41 can also be made of steel pipe, and the rear end of the installation head 42 also presents a cylindrical cross-section, and its outer diameter is slightly smaller than the inner diameter of the longitudinal beam 41, so that it can be nested together and fixed by a fixing device. The reason why the longitudinal beam 41 is hinged to the straight bar 31 is to make the installation head 42 rotate relative to the straight bar 31 together with the longitudinal beam 41 , so as to realize the adjustment of the height of the installation head 42 . the

The height adjustment of the installation head 42 is accomplished through a hydraulic loading system 50 , which includes a hydraulic control system 51 , pipes 53 , hydraulic cylinders 52 and hydraulic rods 54 . Wherein, the fixed end of the hydraulic cylinder 52 is hinged at the middle part of the beam 33 of the vertical support 30, the hydraulic rod 54 is located in the hydraulic rod 52, thereby forming the movable end of the hydraulic cylinder, and its other end is hinged at the bottom of the longitudinal beam 41, Therefore, the piston movement between the hydraulic rod 54 and the hydraulic cylinder 52 can push the longitudinal beam 41 to rotate around its hinge point with the straight rod 31 , and finally realize the height adjustment of the installation head 42 (as shown in FIG. 6 ). The hydraulic control system 51 can be placed in any convenient position, for example, placed on one side of the cross bar 22 of the trolley chassis 20, which is connected to the hydraulic cylinder 52 through a pipeline 53 for controlling the oil pressure in the hydraulic cylinder 52, thereby Control of the piston movement of the hydraulic rod 54 is achieved. the

The tie rod 70 is used to adjust the posture of the landing gear relative to the trolley, and one end thereof is hingedly connected to the bottom end of the longitudinal beam 41 and is close to the connecting position of the hydraulic rod 54 and the longitudinal beam 41 . The pull rod 70 mainly includes three parts, namely two screw rods 71, 72 with opposite threads at both ends, and a connection part 73 in the middle of the two screw rods. 72 matching nuts are fixedly connected together to form. Thus, by turning the connecting portion 73, the distance between the screw rods 71, 72 can be adjusted. the

The hoop 80 is used to fix the undercarriage to the trolley, and it is connected between the two fork heads 43 by bolts so as to be able to rotate around the axis of the bolts. As shown in FIG. 7 , the hoop 80 is ring-shaped, so as to fix the landing gear on the trolley through its inner surface. Wherein, the surface of the hoop 80 is galvanized, and its inner surface includes a circle of rubber gaskets 81 whose shape is basically adapted to the shape of the landing gear. After the hoop 80 is tightened by the bolts 82 on both sides, the rubber gasket 81 can firmly fix the undercarriage, so that the attitude of the undercarriage can be adjusted indirectly by adjusting the attitude of each part of the trolley. the

The whole process of installing the undercarriage using the trolley in this embodiment will be briefly described below, so as to understand the advantages of the utility model more clearly. the

First, the landing gear is loaded onto the bottom beam 21 of the underframe 20 of the trolley 100, so that the two wheels of the landing gear are located on both sides of the bottom beam 21 respectively. And adjust the position of the undercarriage, clamp the pillar of the undercarriage with the hoop 80 having the rubber gasket 81, and then connect the lower end of the pull rod 70 to the connecting position on the undercarriage. At this point, the landing gear has been initially fixed to the installation trolley. At the same time, the attitude of the support frame 40 on which the trolley is installed can be further adjusted with respect to the rotation of the vertical support 30 . the

Then push the dolly to the underside of the fuselage where the landing gear is to be installed, and respectively pull the handles 63 of the two bottom surface adjustment devices 60, thereby driving the threaded rod 64 to rotate in the threaded sleeve 62, so that the threaded rod 64 is continuously stretched out downwards, And the legs 61 support the ground. Observe the posture of the dolly, and further pull the handle 63 in a small range to realize the fine adjustment of the height of the threaded rod 64. At this time, the two rear wheels 24 of the chassis 20 are suspended in the air, and only the front wheels 23 are still supported on the ground, and finally the front wheels 23 are supported by the front wheels. The wheels 23 and the feet 61 of the two bottom surface adjustment devices 60 jointly determine the required installation support bottom surface. the

Next, the attitude of the landing gear is finally adjusted by turning the connecting portion 73 of the pull rod 70 again until the landing gear is adjusted to the correct installation attitude. the

Finally, activate the hydraulic control system, use the thrust of the hydraulic rod 54 to rotate the longitudinal beam 41 of the support frame 40 upward relative to the straight rod 31, thereby raising the landing gear to the correct installation position, and complete the installation work. the

It needs to be supplemented that the force bearing structure of the entire installation trolley is shown in FIG. 5 . It can be seen from the figure that the triangular arrangement is mostly used in the stress structure, which makes the overall structure very stable. the

Claims (14)

1. a undercarriage is installed dolly, it is characterized in that, comprising: underframe (20), vertical rack (30), bracing frame (40), hydraulic loading system (50), bottom surface adjusting device (60) and anchor ear (80);

Wherein, described vertical rack (30) is fixedly connected on an end of described underframe (20);

One end of support frame as described above (40) is hinged on the top of described vertical rack (30);

Described hydraulic loading system (50) can make support frame as described above (40) rotate around the top of described vertical rack (30);

Described anchor ear (80) is connected on the free end of support frame as described above (40), is used for undercarriage to be installed is fixed; And

Described bottom surface adjusting device (60) is installed on the described underframe (20), is used to adjust described undercarriage the supporting plane of dolly with respect to ground is installed.

2. undercarriage as claimed in claim 1 is installed dolly, it is characterized in that also comprise pull bar (70), the one end is hinged on the lower end of support frame as described above (40), and the other end links to each other with described undercarriage to be installed.

3. undercarriage as claimed in claim 1 is installed dolly, it is characterized in that described underframe (20) comprises bottom girder (21) and cross bar (22), and they form " ten " word structure.

4. undercarriage as claimed in claim 3 is installed dolly, it is characterized in that described underframe (20) also comprises front-wheel (23) and paired trailing wheel (24), is installed in the two ends, the left and right sides of the front end and the described cross bar (22) of described bottom girder (21) respectively.

5. undercarriage as claimed in claim 3 is installed dolly, it is characterized in that, described bottom surface adjusting device (60) is provided with in pairs, lays respectively at the left and right sides of described cross bar (22), and is fixed on the described bottom girder (21).

6. as the described undercarriage of each claim among the claim 1-5 dolly is installed, it is characterized in that, described bottom surface adjusting device (60) comprises leg (61), threaded sleeve (62), threaded rod (64) and handle (63), wherein said threaded sleeve (62) is fixedlyed connected with described bottom girder (21), described threaded rod (64) is mated in described threaded sleeve (62), and described handle (63) and described leg (61) are installed in the two ends up and down of described threaded rod (64) respectively.

7. as the described undercarriage of each claim among the claim 3-5 dolly is installed, it is characterized in that, described vertical rack (30) comprises straight-bar (31) and paired brace (32), is connected respectively to the rear end of described bottom girder (21) and the two ends, the left and right sides of described cross bar (22).

8. undercarriage as claimed in claim 7 is installed dolly, it is characterized in that described vertical rack (30) also comprises beam (33) between described paired brace (32).

9. as the described undercarriage of each claim among the claim 1-5 dolly is installed, it is characterized in that, support frame as described above (40) comprises at its free end installs head (42), and two jaws (43) that it comprises biasing are used for described anchor ear (80) is connected between described two jaws (43).

10. as the described undercarriage of each claim among the claim 1-5 dolly is installed, it is characterized in that, described hydraulic loading system (50) comprises hydraulic control system (51), pipeline (53), hydraulic cylinder (52) and hydraulic stem (54), wherein said hydraulic cylinder (52) links to each other with described hydraulic stem (54) one ends, the other end of described hydraulic cylinder (52) is hinged on the described vertical rack (30), and the other end of described hydraulic stem (54) is hinged on the lower end of support frame as described above (40).

11. undercarriage as claimed in claim 10 is installed dolly, it is characterized in that, the hinged end of described hydraulic cylinder (52) and described vertical rack (30) is to be connected on the described beam (33).

12. undercarriage as claimed in claim 10 is installed dolly, it is characterized in that, the hinged end of described hydraulic stem (54) and support frame as described above (40) is the bottom that is connected described longitudinal beam (41), and the position that links to each other with described longitudinal beam (41) near described pull bar (70).

13. as the described undercarriage of each claim among the claim 1-5 dolly is installed, is it is characterized in that the surface of described anchor ear (80) has zinc coat.

14. dolly is installed as the described undercarriage of each claim among the claim 1-5, it is characterized in that the inner surface of described anchor ear (80) comprises rubber gasket (81), the profile of its shape and described undercarriage leg to be installed adapts.

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