Double-layer jacking jack

Abstract

The utility model provides a double-layer jacking jack, and relates to the technical field of jacking equipment. The lower lifting cylinder can be vertically and slidably inserted into the outer cylinder, rotatable driving cylinders are arranged at the upper ends of the outer cylinder body and the lower lifting cylinder, and the upper end of the lower lifting cylinder extends out of the driving cylinder at the upper end of the outer cylinder body and is in threaded connection with the driving cylinder; the upper lifting rod can be vertically inserted into the lower lifting cylinder in a sliding manner, and the upper end of the upper lifting rod extends out of the driving cylinder at the upper end of the lower lifting cylinder and is in threaded connection with the driving cylinder; and the two cranks are respectively connected with the two driving cylinders to drive the driving cylinders to rotate so as to drive the lower lifting cylinder and the upper lifting rod to lift. The lifting device has the advantages that the lower lifting cylinder and the upper lifting rod form a two-stage lifting stroke, jacking at different heights can be achieved, the overall jacking height is greatly increased, when the lifting device is applied to aircraft assembly machining, an aircraft can be jacked to a sufficient height, and the problem that the operation space below the aircraft is insufficient is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to jacking equipment technical field especially relates to a double -deck jacking jack. BACKGROUND

[0002] The operation of supporting parking, attitude measurement, outfield maintenance and component replacement in the process of aircraft machining and assembly all need to use the jack. The traditional mechanical jack tool is the lifting mode frequently used by large aircraft and unmanned aerial vehicle, which realizes the functions of entering position, lifting and fine adjustment by manually adjusting the height, and has the characteristics of simple operation, light equipment, low cost and easy movement, but has the disadvantage that the increased height of the traditional mechanical jack is low, the aircraft is close to the ground after being jacked up, which leads to insufficient operation space below the aircraft in the process of aircraft machining and assembly. SUMMARY

[0003] Therefore, in order to solve the problem of low increased height of the traditional mechanical jack, the embodiment of the utility model provides a double -deck jacking jack.

[0004] The embodiment of the utility model provides a double -deck jacking jack, which comprises:

[0005] An outer cylinder;

[0006] A lower lifting cylinder vertically slidable inserted into the outer cylinder, the upper end of the lower lifting cylinder extending out of the driving cylinder of the upper end of the outer cylinder and being threadedly connected with the driving cylinder;

[0007] An upper lifting rod vertically slidable inserted into the lower lifting cylinder, the upper end of the upper lifting rod extending out of the driving cylinder of the upper end of the lower lifting cylinder and being threadedly connected with the driving cylinder;

[0008] And two crank handles respectively connected with the two driving cylinders to drive the rotation of the driving cylinders and thus drive the lifting of the lower lifting cylinder and the upper lifting rod.

[0009] Further, each crank handle comprises a shell and two shift teeth arranged in the shell, the shell being rotatably sleeved on the periphery of the driving cylinder, the outer wall of the driving cylinder being provided with a driving tooth, the two shift teeth being rotatably mounted in the shell by elastic members, and the two shift teeth being engaged with the driving tooth, the two shift teeth being opposite to each other to shift the driving tooth in different directions.

[0010] Further, each crank handle further comprises a limiting tooth, and the two shift teeth are arranged on the two sides of the limiting tooth, so that when one shift tooth shifts the driving tooth, the other shift tooth is separated from the driving tooth.

[0011] Further, the elastic member is a torsion spring.

[0012] Further, the shell is provided with a handle.

[0013] Further, the outer wall of the lower lifting cylinder and the upper lifting rod is provided with a vertical limiting groove, the inner hole of the outer cylinder body and the lower lifting cylinder is provided with a limiting ring at the upper end, the inner wall of the limiting ring is provided with a limiting block extending inwardly, and the limiting block is embedded in the limiting groove, so that the lower lifting cylinder and the upper lifting rod can only move in the vertical direction.

[0014] Further, the lower end of the driving cylinder is provided with a convex ring, the convex ring at the lower end of one driving cylinder is rotatably embedded in the upper end of the inner hole of the outer cylinder body, and the convex ring at the lower end of the other driving cylinder is rotatably embedded in the upper end of the inner hole of the lower lifting cylinder.

[0015] Further, the upper end of the upper lifting rod is provided with a spherical top head.

[0016] Further, the base is movable, the base is provided with a plurality of adjustable locking feet, the lower end of the outer cylinder body is fixed on the base, and each adjustable locking foot is arranged at the bottom of the base.

[0017] Further, the bottom of the base is provided with a plurality of rollers, the base is in the shape of a Y letter, the lower end of the outer cylinder body is fixed on the center of the base, and the number of adjustable locking feet is three, and the three adjustable locking feet are arranged at the bottom of the three vertices of the base.

[0018] The technical scheme provided by the embodiment of the utility model has the beneficial effects that:

[0019] 1. The double-layer jacking jack provided by the utility model can realize different jacking heights through two-stage lifting strokes of the lower lifting cylinder and the upper lifting rod, and can greatly prolong the overall jacking height.

[0020] 2. The double-layer jacking jack provided by the utility model can be moved to a required position, and can be firmly fixed to the ground through adjustable locking feet during the jacking process, so that the double-layer jacking jack can be stably jacked, and temporary fixing and movement are convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of embodiment 2 of the double-layer jacking jack of the utility model;

[0022] Figure 2is a schematic view of the double-layer jacking jack embodiment 1 of the utility model;

[0023] Figure 3 is a top view of the double-layer jacking jack embodiment 1 of the utility model;

[0024] Figure 4 is Figure 3 A-A section in the schematic view;

[0025] Figure 5 is the explosion view of the double-layer jacking jack embodiment 1 of the utility model;

[0026] Figure 6 is the schematic view of the crank handle;

[0027] Figure 7 is the internal structure diagram of the crank handle.

[0028] In the drawing: 1, outer cylinder body;2, lower lifting cylinder;3, upper lifting rod;4, crank handle;5, drive cylinder;6, base;7, adjustable locking foot;8, roller;9, drive tooth;10, limiting ring;11, limiting block;12, convex ring;13, top head;14, shell;15, handle;16, shifting tooth;17, limiting tooth. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the drawings to make further description to the utility model embodiment. The following introduction is one of the more optimal ones in multiple possible embodiments of the utility model, and is intended to provide the basic understanding of the utility model, but is not intended to confirm the key or decisive elements of the utility model or limit the scope of protection.

[0030] In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of example embodiments can have different values.

[0031] The technology, method and equipment known to the person skilled in the relevant art can not be discussed in detail, but should be regarded as part of the specification under appropriate circumstances.

[0032] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be discussed further in the subsequent drawings. At the same time, it should be understood that, in order to facilitate the description, the size of each part shown in the drawings is not drawn according to the actual proportional relationship.

[0033] It should be noted that unless specifically defined otherwise, the terms "mounting", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be direct connection, can also be indirect connection through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according of the specific circumstances.

[0034] Embodiment 1

[0035] Please refer to Figures 2-5 The embodiment of the utility model provides a double-layer jacking jack, including outer cylinder 1, lower lifting cylinder 2, upper lifting rod 3 and two crank handles 4.

[0036] As Figure 5 Indicated, the outer cylinder 1 is vertically arranged, and the upper end and the lower end are both open.

[0037] The lower lifting cylinder 2 can be vertically slidably inserted into the outer cylinder, the upper end of the outer cylinder 1 and the lower lifting cylinder 2 are both provided with rotatable drive cylinder 5, the upper end of the lower lifting cylinder 2 extends out of the drive cylinder 5 of the upper end of the outer cylinder 1 and is screw-connected with the drive cylinder 5.

[0038] Herein the lower end of the drive cylinder 5 is provided with convex ring 12, the convex ring 12 is protruded relative to the outer wall of the drive cylinder 5. The convex ring 12 of the lower end of one drive cylinder 5 is rotatably embedded in the upper end of the inner hole of the outer cylinder 1, so that the drive cylinder 5 is coaxially arranged with the outer cylinder 1 and rotatably connected. The convex ring 12 of the lower end of another drive cylinder 5 is rotatably embedded in the upper end of the inner hole of the lower lifting cylinder 2, so that the drive cylinder 5 is coaxially arranged with the lower lifting cylinder 2 and rotatably connected.

[0039] The upper lifting rod 3 can be vertically slidably inserted into the lower lifting cylinder 2, and the upper end of the upper lifting rod 3 extends out of the drive cylinder 5 of the upper end of the lower lifting cylinder 2 and is screw-connected with the drive cylinder 5.

[0040] The lower lifting cylinder 2 and the upper lifting rod 3 are generally arranged to move only along the vertical direction, so that the lower lifting cylinder 2 and the upper lifting rod 3 can move stably in the vertical direction. In the embodiment, the outer walls of the lower lifting cylinder 2 and the upper lifting rod 3 are provided with limiting grooves arranged vertically, the inner hole of the outer cylinder body 1 and the upper end of the lower lifting cylinder 2 are provided with a limiting ring 10, the inner wall of the limiting ring 10 is provided with a limiting block 11 extending inwardly, the limiting block 11 is embedded in the limiting groove, and the limiting block 11 is matched with the limiting groove. For example, the limiting groove is arranged as a rectangular groove arranged along the vertical direction, the limiting block 11 is a rectangular block, the limiting block 11 guides the limiting groove, so that the lower lifting cylinder 2 and the upper lifting rod 3 can only move along the vertical direction.

[0041] The two handles 4 are respectively connected to the two drive cylinders 5, so as to drive the drive cylinders 5 to rotate, thereby driving the lower lifting cylinder 2 and the upper lifting rod 3 to lift. Figure 6 and 7 As shown in the figures, each handle 4 comprises an outer shell 14 and two driving teeth 16 arranged in the outer shell 14. The outer shell 14 is rotatably sleeved on the periphery of the drive cylinder 5, the outer wall of the drive cylinder 5 is provided with a drive tooth 9, and the two driving teeth 16 are rotatably mounted in the outer shell 14 by elastic members. The elastic members can be selected as torsional springs, and the two driving teeth 16 are engaged with the drive tooth 9. The two driving teeth 16 are relatively forked to drive the drive tooth 9 in different directions.

[0042] In some embodiments, each handle 4 further comprises a limiting tooth 17, and the two driving teeth 16 are arranged on the two sides of the limiting tooth 17 respectively. The limiting tooth 17 is isosceles triangular, and the two driving teeth 16 are symmetrically arranged relative to the limiting tooth 17. When the handle 4 rotates in a direction, it drives the two driving teeth 16 to move in the direction, one of the driving teeth 16 drives the drive tooth 9 to move in the direction, and the other driving tooth 16 is blocked by the limiting tooth 17 and separated from the drive tooth 9. In this way, the limiting tooth 17 can separate the other driving tooth 16 from the drive tooth 9 when one of the driving teeth 16 drives the drive tooth 9, so as to avoid the influence of the other driving tooth 16 on the rotation of the drive tooth 9.

[0043] In some embodiments, the outer shell 14 is provided with a handle 15, which is arranged radially and extends away from the drive cylinder 5. The handle 15 can be easily rotated to drive the drive cylinder 5 to rotate.

[0044] The upper end of the lifting and lowering rod 3 is used to directly lift the article to be lifted.

[0045] Embodiment 2

[0046] In addition, as Figure 1 Embodiment 2 of the utility model provides a double-layer lifting jack, on the basis of embodiment 1 further include movable base 6, base 6 is equipped with a plurality of adjustable locking feet 7, the outer cylinder 1 lower end is fixed on base 6, each adjustable locking foot 7 is arranged at the bottom of base 6. Before lifting, the double-layer lifting jack is moved to the article to be lifted by base 6, and then the base 6 is locked with the ground by adjustable locking foot 7, so that the double-layer lifting jack is kept stable and then lifted.

[0047] In one example, the bottom of the base 6 is provided with a plurality of rollers 8, the rollers 8 are universal wheels, when the adjustable locking feet 7 are raised and separated from the ground, the base 6 can slide freely through the rollers 8.

[0048] It should be noted that the shape of the base 6 can be flexibly set according to the actual application scene, such as the base 6 being Y-shaped, the lower end of the outer cylinder 1 being fixed to the center of the base 6, and the number of adjustable locking feet 7 being three, the three adjustable locking feet 7 being arranged at the bottom of the three vertices of the base 6. In this way, the three adjustable locking feet 7 are locked with the ground during lifting, which can provide stable support for the base 6 and improve the stability of the lifting process.

[0049] Taking the aircraft assembly process as an example, the double-layer lifting process of the double-layer lifting jack of the utility model is described:

[0050] First, raise each adjustable locking foot 7 to separate from the ground, move the base 6 to the aircraft, and then lower each adjustable locking foot 7 to contact and lock with the ground;

[0051] Then, rotate one of the ratchets 4 located below, drive the driving teeth 9 by the ratchet 4 to drive the driving cylinder 5 to rotate, the inner wall of the driving cylinder 5 is in threaded transmission with the lower lifting cylinder 2, so that the lower lifting cylinder 2 moves vertically upward;

[0052] Finally, rotating the upper said handle 4, through the handle 4 drive gear 16 drive gear 9, so that the drive cylinder 5 rotation, the drive cylinder 5 inner wall and the upper lifting rod 3 screw transmission, so that the upper lifting rod 3 vertical upward movement, so through the lower lifting cylinder 2 and the upper lifting rod 3 form two-stage jacking stroke, greatly improve the jacking height.

[0053] It should be noted that, generally only three double jacking jack can complete the jacking of the aircraft. For aircraft with a fixed center of gravity or heavy aircraft, the number of double jacking jack can be increased to five or six or even more, to ensure the effective and safe lifting of the aircraft.

[0054] In this article, the front, back, up, down and other orientation words are defined by the position of the components in the drawing and the position of the components relative to each other in the drawing, only to express the technical solution clearly and conveniently. It should be understood that they are relative concepts, which can be changed accordingly according to different ways of use and placement, and the use of the orientation words should not limit the scope of the application.

[0055] In the case of no conflict, the above embodiments and features in the embodiments can be combined with each other. The above is only the preferred embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A double-layer lifting jack, characterized by: include: outer cylinder; A lower lifting cylinder is vertically slidably inserted into the outer cylinder. The upper ends of the outer cylinder and the lower lifting cylinder are both provided with a rotatable driving cylinder. The upper end of the lower lifting cylinder extends out of the driving cylinder at the upper end of the outer cylinder and is threadedly connected to the driving cylinder. an upper lifting rod, which can be vertically slidably inserted into the lower lifting cylinder, and the upper end of the upper lifting rod extends out of the driving cylinder at the upper end of the lower lifting cylinder and is threadedly connected to the driving cylinder; And two cranks are respectively connected to the two driving cylinders to drive the driving cylinders to rotate and thus drive the lower lifting cylinder and the upper lifting rod to move up and down.

2. A double-layer lifting jack according to claim 1, characterized in that: Each crank includes a shell and two toggle teeth arranged in the shell. The shell is rotatably mounted on the outer periphery of the driving cylinder. The outer wall of the driving cylinder is provided with driving teeth. The two toggle teeth are rotatably installed in the shell through elastic parts, and the two toggle teeth are engaged with the driving teeth. The two toggle teeth are relatively forked so that the driving teeth can be toggled in different directions.

3. A double-layer lifting jack according to claim 2, characterized in that: Each crank further comprises a limiting tooth, and the two shifting teeth are respectively arranged on both sides of the limiting tooth, so that when one shifting tooth shifts the driving tooth, the other shifting tooth is separated from the driving tooth.

4. A double-layer lifting jack according to claim 2 or 3, characterized in that: The elastic member is a torsion spring.

5. A double-layer lifting jack according to claim 2 or 3, characterized in that: The housing is provided with a handle.

6. The double-layer lifting jack according to claim 1, characterized in that: The outer walls of the lower lifting cylinder and the upper lifting rod are provided with vertically arranged limit grooves, the upper ends of the inner holes of the outer cylinder and the lower lifting cylinder are provided with limit rings, the inner walls of the limit rings are provided with limit blocks extending inwardly, and the limit blocks are embedded in the limit grooves, so that the lower lifting cylinder and the upper lifting rod can only move in the vertical direction.

7. The double-layer lifting jack according to claim 1, characterized in that: A convex ring is provided at the lower end of the driving cylinder. One convex ring at the lower end of the driving cylinder can be rotatably embedded in the upper end of the inner hole of the outer cylinder, and the other convex ring at the lower end of the driving cylinder can be rotatably embedded in the upper end of the inner hole of the lower lifting cylinder.

8. The double-layer lifting jack according to claim 1, characterized in that: The upper end of the upper lifting rod is provided with a spherical top.

9. The double-layer lifting jack according to claim 1, characterized in that: It also includes a movable base, which is provided with a plurality of adjustable locking feet. The lower end of the outer cylinder is fixed on the base, and each of the adjustable locking feet is arranged at the bottom of the base.

10. The double-layer lifting jack according to claim 9, characterized in that: A plurality of rollers are provided at the bottom of the base, the base is Y-shaped, the lower end of the outer cylinder is fixed to the center of the base, the number of the adjustable locking feet is set to three, and the three adjustable locking feet are respectively arranged at the bottom of the three vertices of the base.

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