Telescopic folding wing

Abstract

A telescopic folding wing, the wing being connected to an aircraft by means of a main support (12), and comprising: a central sleeve assembly (B) centrally disposed, used for supporting loads and capable of telescoping; an outer sleeve assembly (A) sleeved on the outer periphery of the central sleeve assembly (B), used for generating lift and capable of telescoping synchronously with the central sleeve assembly (B); a folding mechanism (9), used for connecting the central sleeve assembly (B) and the outer sleeve assembly (A) together with the main support (12); and a propeller (7) disposed on an outer end of the wing body. The central sleeve assembly (B) and the outer sleeve assembly (A) are sleeved together to form a telescopic body, which is connected to the folding mechanism (9) by means of a variable-diameter deformable tube (3); and a telescopic driving mechanism (8) is disposed inside the central sleeve assembly (B).

Description

A telescopic folding wing TECHNICAL FIELD

[0001] The present application belongs to the field of flight technology equipment, and particularly relates to a telescopic folding wing. BACKGROUND

[0002] At present, airplanes are widely used due to various functions and uses. In the prior art, the shape of the wing of an airplane is fixed, and the wing area and volume cannot be changed. The current airplanes cannot meet the needs of people for individualization and diversification of airplanes. Therefore, it is of great significance to develop and design a telescopic folding wing. SUMMARY

[0003] The present application aims to make up for the shortcomings of the prior art and provide a telescopic folding wing.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a telescopic folding wing, which is connected with a flying vehicle through a main support, characterized in that: a center sleeve group for supporting and bearing and capable of telescoping is arranged in the middle; an outer sleeve group for generating lift and capable of telescoping synchronously with the center sleeve group is arranged outside the center sleeve group; a folding mechanism for connecting the center sleeve group and the outer sleeve group together with the main support is arranged; and a propeller is arranged on the upper end of the main body of the wing.

[0005] The center sleeve group and the outer sleeve group are telescopically connected to form a telescopic whole, and the telescopic whole is connected with the folding mechanism through a variable-diameter deformation pipe; and the center sleeve group is internally provided with a telescopic driving mechanism.

[0006] The structure of the center sleeve group is that a plurality of square section pipes with gradually decreasing cross-sectional areas are telescopically connected, and the square section pipe with the largest cross-sectional area is arranged close to the folding mechanism.

[0007] The structure of the outer sleeve group is that a plurality of flat section pipes with gradually increasing cross-sectional areas are telescopically connected to form a wing shape, and the flat section pipe with the smallest cross-sectional area is arranged close to the folding mechanism.

[0008] In the center sleeve group, there are four square section pipes, and in the outer sleeve group, there are four flat section pipes.

[0009] In the direction shown in FIG. 2, the two ends of the square section pipe are respectively referred to as left end and right end, and the two ends of the flat section pipe are respectively referred to as left end and right end.

[0010] The right end of the first flat section pipe is provided with a No. 0 blanking plate, a circular hole is formed in the center of the No. 0 blanking plate, an outer shaft pipe passes through the circular hole and is matched for rotation, and an inner shaft pipe matched for rotation is sleeved on the inner wall of the outer shaft pipe.

[0011] The center of the first baffle plate of the left end of the first flat section pipe is provided with a square hole, the first square section pipe is inserted into the square hole, the left end of the first square section pipe is fixedly connected with the square hole, the right end is in communication with the inner shaft pipe, and the outer end of the outer shaft pipe is fixedly connected with a variable-diameter deformation pipe for connecting the folding mechanism.

[0012] The center of the second baffle plate of the left end of the second flat section pipe is provided with a square hole, the second square section pipe is inserted into the square hole, the left end of the second square section pipe is fixedly connected with the square hole, and the right end is inserted into the first square section pipe; the left end of the second flat section pipe is sleeved and inserted into the third flat section pipe and is in sliding connection with the third flat section pipe.

[0013] The center of the third baffle plate of the left end of the third flat section pipe is provided with a square hole, the third square section pipe is inserted into the square hole, the left end of the third square section pipe is fixedly connected with the square hole, and the right end is inserted into the second square section pipe; the left end of the third flat section pipe is sleeved and inserted into the fourth flat section pipe and is in sliding connection with the fourth flat section pipe.

[0014] The center of the fourth baffle plate of the left end of the fourth flat section pipe is fixedly provided with the fourth square section pipe, and the right end of the fourth square section pipe is inserted into the third square section pipe.

[0015] The sleeving structure of adjacent square section pipes: one end of a square section pipe with a large cross-sectional area is provided with a middle baffle plate, a square hole is formed in the middle baffle plate, and an adjacent square section pipe with a small cross-sectional area is in sliding connection with the square hole.

[0016] The sleeving structure of adjacent flat section pipes: one end of a flat section pipe with a large cross-sectional area is provided with a side baffle plate, a hole matched with the shape of a wing is formed in the middle of the side baffle plate, and an adjacent flat section pipe with a small cross-sectional area is in sliding connection with the hole.

[0017] The inner shaft pipe extends out of the outer shaft pipe, the end of the extended inner shaft pipe is connected with a turbine gear ring matched therewith, the turbine gear ring is connected with a turbine steering engine, the turbine steering engine is fixed to the inner wall of the variable-diameter deformation pipe and is in meshing connection with the turbine gear ring to drive the inner shaft pipe and the outer shaft pipe to rotate in cooperation; one end of the variable-diameter deformation pipe is a small circular end, the other end is a large square end, the outer end of the outer shaft pipe is connected with the small circular end, and the folding mechanism is connected with the large square end.

[0018] The telescopic driving mechanism specifically comprises that a large circular hole is formed in the center of the right end face of the third square section pipe, a first hydraulic cylinder body passes through the large circular hole and is fixedly connected with the right end face of the second square section pipe, a small circular hole is formed in the center of the right end face of the second square section pipe, a piston rod of the first hydraulic cylinder extends out of the small circular hole and is fixedly connected with a connecting rod fixed in the inner shaft pipe; a first pulley is fixed to the tail of the first hydraulic cylinder, one end of a first rope is fixed to the connecting rod, the other end of the first rope passes through the right end faces of the second square section pipe and the third square section pipe in sequence, is wound around the first pulley and is fixed to the right end inside the third square section pipe.

[0019] The second pulley is fixed at the inner right end of the third square section pipe, the third pulley is fixed at the inner left end of the third square section pipe, one end of the second rope is fixed with the connecting rod on the first hydraulic cylinder, the other end of the second rope is connected to the right end of the fourth square section pipe through the second pulley, one end of the third rope is fixed at the right end of the fourth square section pipe, the other end of the third rope is fixed at the inner right end of the second square section pipe through the third pulley and the right end of the third square section pipe.

[0020] The fourth pulley is fixed at the outer right end of the second square section pipe, one end of the fourth rope is fixed at the outer right end of the third square section pipe, the other end of the fourth rope is fixed at the inner left end of the first square section pipe through the second square section pipe and the fourth pulley.

[0021] The right end of the fourth square section pipe is provided with a through hole for the free in and out of the first hydraulic cylinder and the first pulley fixed thereon.

[0022] The folding mechanism is composed of support plates, a second hydraulic cylinder and a third hydraulic cylinder; the support plates are two, vertically and parallelly arranged at a certain distance, the side of the two support plates away from the variable-diameter deformation pipe is hinged to the main support through a connecting shaft, the upper corner of the other side is connected with the variable-diameter deformation pipe through a universal joint, and the lower corner of the other side is installed with a stabilizing lock; one end of the second hydraulic cylinder is hinged to the main support, and the other end is hinged to the variable-diameter deformation pipe; one end of the third hydraulic cylinder is hinged to the main support, and the other end is hinged to one end of one of the support plates.

[0023] The present application has the advantages of compact structure, the center sleeve group for supporting the load and being telescopic, and the outer sleeve group for generating lift force, and the telescopic driving mechanism arranged in the center sleeve group, so that the center sleeve group and the outer sleeve group are synchronously telescopic. The fixed wing structure cannot be telescopic and folded, and the area and volume cannot be changed, and the present application provides technical support for the deformation aircraft. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a longitudinal sectional view of the present application;

[0025] Fig. 2 is a schematic view of the connection between the outer sleeve group and the center sleeve group of the wing of the present application;

[0026] Fig. 3 is a top view of the folding mechanism of the present application;

[0027] Figure: 1 - inner tube, 2 - outer tube, 3 - variable diameter deformation tube, 4 - turbine steering machine, 5 - universal joint, 6 - stabilizing lock, 7 - propeller, 8 - telescopic drive mechanism, 80 - first hydraulic cylinder, 81 - first pulley, 82 - second pulley, 83 - third pulley, 84 - fourth pulley, 85 - first rope, 86 - second rope, 87 - third rope, 88 - fourth rope; 9 - folding mechanism, 91 - support plate, 92 - second hydraulic cylinder, 93 - third hydraulic cylinder, 94 - connecting shaft; 10 - connecting rod, 11 - turbine ring gear, 12 - main support; A - outer sleeve group, An - flat section tube, A1 - No. 1 flat section tube, A2 - No. 2 flat section tube, A3 - No. 3 flat section tube, A4 - No. 4 flat section tube; B - center sleeve group, Bn - square section tube, B1 - No. 1 square section tube, B2 - No. 2 square section tube, B3 - No. 3 square section tube, B4 - No. 4 square section tube, B41 - through hole; D0 - No. 0 blocking plate, D1 - No. 1 blocking plate, D2 - No. 2 blocking plate, D3 - No. 3 blocking plate, D4 - No. 4 blocking plate; E - side sealing plate, F - middle sealing plate. DETAILED DESCRIPTION

[0028] Referring to Figures 1-3, a telescopic folding wing is connected to an aircraft through a main support 12, characterized in that it comprises a center sleeve group B arranged and installed in the middle for supporting weight and capable of telescoping, an outer sleeve group A sleeved outside the center sleeve group B for generating lift and capable of telescoping synchronously with the center sleeve group B, a folding mechanism 9 for connecting the center sleeve group B and the outer sleeve group A together with the main support 12, and a propeller 7 arranged on the upper end of the wing body.

[0029] The center sleeve group B and the outer sleeve group A are sleeved to form a telescopic whole, which is connected to the folding mechanism 9 through a variable diameter deformation tube 3; the center sleeve group B is internally arranged with a telescopic drive mechanism 8;

[0030] The structure of the center sleeve group B is that, starting from the folding mechanism 9, a plurality of square section tubes Bn with gradually decreasing cross-sectional areas are sleeved to form a telescopic whole, and the square section tube B1 with the largest cross-sectional area is arranged near the folding mechanism 9;

[0031] The structure of the outer sleeve group A is that, starting from the folding mechanism 9, a plurality of flat section tubes An with gradually increasing cross-sectional areas are sleeved to form a wing shape, and the flat section tube A1 with the smallest cross-sectional area is arranged near the folding mechanism 9.

[0032] In the center sleeve group B, there are four square section tubes Bn, and in the outer sleeve group A, there are four flat section tubes An.

[0033] In the direction shown in Figure 2, the two ends of the square section tube Bn are respectively called left end and right end, and the two ends of the flat section tube An are respectively called left end and right end.

[0034] The right end of the first flat section pipe A1 is provided with a No. 0 blanking plate D0, a circular hole is formed in the center of the No. 0 blanking plate D0, and the outer shaft pipe 2 passes through the circular hole and is matched in rotation, and the inner wall of the outer shaft pipe 2 is sleeved with the inner shaft pipe 1 matched in rotation;

[0035] A square hole is formed in the center of the No. 1 blanking plate D1 at the left end of the first flat section pipe A1, the No. 1 square section pipe B1 is inserted into the square hole, the left end of the No. 1 square section pipe B1 is fixedly connected with the square hole, the right end is communicated with the inner shaft pipe 1, and the outer end of the outer shaft pipe 2 is fixedly connected with the variable-diameter deformation pipe 3 for connecting the folding mechanism 9; the left end of the first flat section pipe A1 is sleeved and inserted into the second flat section pipe A2 and is slidably connected therewith;

[0036] A square hole is formed in the center of the No. 2 blanking plate D2 at the left end of the second flat section pipe A2, the No. 2 square section pipe B2 is inserted into the square hole, the left end of the No. 2 square section pipe B2 is fixedly connected with the square hole, and the right end is inserted into the No. 1 square section pipe B1; the left end of the second flat section pipe A2 is sleeved and inserted into the third flat section pipe A3 and is slidably connected therewith;

[0037] A square hole is formed in the center of the No. 3 blanking plate D3 at the left end of the third flat section pipe A3, the No. 3 square section pipe B3 is inserted into the square hole, the left end of the No. 3 square section pipe B3 is fixedly connected with the square hole, and the right end is inserted into the No. 2 square section pipe B2; the left end of the third flat section pipe A3 is sleeved and inserted into the fourth flat section pipe A4 and is slidably connected therewith;

[0038] The No. 4 square section pipe B4 is fixed in the center of the No. 4 blanking plate D4 at the left end of the fourth flat section pipe A4, and the right end of the No. 4 square section pipe B4 is inserted into the No. 3 square section pipe B3.

[0039] The sleeving structure of adjacent square section pipes Bn: one end of a square section pipe Bn with a large cross-sectional area is provided with a middle blanking plate F, a square hole is formed in the middle of the middle blanking plate F, and an adjacent square section pipe Bn with a small cross-sectional area is slidably connected with the square hole;

[0040] The sleeving structure of adjacent flat section pipes An: one end of a flat section pipe An with a large cross-sectional area is provided with a side blanking plate E, a hole matched with the shape of a wing is formed in the middle of the side blanking plate E, and an adjacent flat section pipe An with a small cross-sectional area is slidably connected with the hole.

[0041] The inner shaft pipe 1 extends out of the outer shaft pipe 2, the end of the extended inner shaft pipe 1 is connected with a turbine gear ring 11 matched therewith, the turbine gear ring 11 is connected with a turbine steering engine 4, the turbine steering engine 4 is fixed on the inner wall of the variable-diameter deformation pipe 3 and is meshingly connected with the turbine gear ring 11 to drive the inner shaft pipe 1 and the outer shaft pipe 2 to rotate in cooperation; one end of the variable-diameter deformation pipe 3 is a small circular end, the other end is a large square end, the outer end of the outer shaft pipe 2 is connected with the small circular end, and the folding mechanism 9 is connected with the large square end.

[0042] The telescopic drive mechanism 8 is specifically that a large circular hole is formed in the center of the right end face of the third square section pipe B3, the first hydraulic cylinder 80 passes through the large circular hole and is fixedly connected with the right end face of the second square section pipe B2, a small circular hole is formed in the center of the right end face of the second square section pipe B2, the piston rod of the first hydraulic cylinder 80 extends out of the small circular hole and is fixedly connected with the connecting rod 10 fixed in the inner shaft pipe 1; the tail of the first hydraulic cylinder 80 is fixed with the first pulley 81, one end of the first rope 85 is fixed on the connecting rod 10, and the other end passes through the right end faces of the second square section pipe B2 and the third square section pipe B3 in sequence, passes around the first pulley 81 and is fixed in the right end inside of the third square section pipe B3.

[0043] The right end inside of the third square section pipe B3 is fixed with the second pulley 82, and the left end inside is fixed with the third pulley 83, one end of the second rope 86 is fixed with the connecting rod on the first hydraulic cylinder 80, the other end passes around the second pulley 82 and is connected to the right end of the fourth square section pipe B4, one end of the third rope 87 is fixed to the right end of the fourth square section pipe B4, the other end passes around the third pulley 83, passes through the right end of the third square section pipe B3 and is fixed to the right end inside of the second square section pipe B2.

[0044] The right end outside of the second square section pipe B2 is fixed with the fourth pulley 84, one end of the fourth rope 88 is fixed to the right end outside of the third square section pipe B3, and the other end passes through the second square section pipe B2, passes around the fourth pulley 84 and is fixed to the left end inside of the first square section pipe B1.

[0045] A through hole B41 is formed in the right end of the fourth square section pipe B4, which is used for the free in and out of the first hydraulic cylinder 80 and the first pulley 81 fixed thereon.

[0046] The folding mechanism 9 is composed of support plates 91, a second hydraulic cylinder 92 and a third hydraulic cylinder 93; the support plates 91 are two, vertically and parallelly arranged at a certain distance, the sides of the two support plates 91 away from the variable-diameter deformation pipe 3 are hingedly connected to the main support 12 through a connecting shaft 94, the upper corners of the other sides are connected to the variable-diameter deformation pipe 3 through universal joints 5, the lower corners of the other sides are installed with stable locks 6, and the variable-diameter deformation pipe 3 is hingedly connected to the support plates 91 through the stable locks 6; one end of the second hydraulic cylinder 92 is hingedly connected to the main support 12, and the other end is hingedly connected to the variable-diameter deformation pipe 3; one end of the third hydraulic cylinder 93 is hingedly connected to the main support 12, and the other end is hingedly connected to one end of one of the support plates 91.

[0047] Working process:

[0048] When the wing is folded, the telescopic wing is in a shrinking and standing state, the folding mechanism 9 completes deflection, and the telescopic folding wing is placed on one side of the main support 12, at this time, the volume of the telescopic folding wing is the smallest, and the shape is the most compact.

[0049] When the telescopic folding wing is unfolded, the third hydraulic cylinder 93 works first, pulling the support plate 91 to rotate around the connecting shaft 94 to the outside of the main support 12, then the second hydraulic cylinder 92 works, pulling the variable diameter deformation pipe 3 and the telescopic wing assembly together to swing around the universal joint 5 to lift up, at this time the stabilizing lock 6 is locked, and the wing is in a horizontal state, then the first hydraulic cylinder 80 works, pushing the second square section pipe B2 and the second flat section pipe A2 to move outward and unfold, the first pulley 81 moves outward and pulls the third square section pipe B3 and the third flat section pipe A3 connected together to move outward and unfold through the first rope 85, while the third square section pipe B3 moves outward and unfolds, the third pulley 83 connected thereto moves outward, pulling the fourth square section pipe B4 and the fourth flat section pipe A4 to move outward and unfold through the third rope 87, at this time the fourth pulley 84 and the second pulley 82 move outward with the second square section pipe B2 and the fourth square section pipe B4.

[0050] The fourth pulley 84 and the second pulley 82 work when the telescopic folding wing is folded. The telescopic folding wing folding process is: the first hydraulic cylinder 80 works to fold, driving the second square section pipe B2 to move inward to the first square section pipe B1, while the second square section pipe B2 moves inward, the fourth pulley 84 installed thereon pulls the third square section pipe B3 to move inward through the fourth rope 88, while the third square section pipe B3 moves inward, the fourth square section pipe B4 is pulled to move inward through the second pulley 82 and the second rope 86, at the same time each flat section pipe moves inward with the corresponding square section pipe, completing the folding of the telescopic folding wing. Then the second hydraulic cylinder 92 works, pushing the variable diameter deformation pipe 3 and the telescopic wing assembly together to swing around the universal joint 5 to hang down, then the third hydraulic cylinder 93 works, pushing the support plate 91 to rotate around the connecting shaft 94 to the inside of the main support 12 while driving the telescopic folding wing to be placed inside the main support 12.

[0051] When the telescopic folding wing needs to change the wing angle, the turbine steering machine 4 and the turbine gear ring 11 work, driving the inner shaft pipe 1 and the folding wing assembly connected together to twist around the axis to change the telescopic folding wing angle.

Claims

1. A telescoping folding wing, which is connected to an aircraft by means of a main support (12), characterized in that: The application relates to a wing structure, which comprises a middle-mounted supporting loadable telescopic central sleeve group (B), an outer sleeve group (A) sleeved on the outer periphery of the central sleeve group (B) and capable of telescoping synchronously with the central sleeve group (B), a folding mechanism (9) for connecting the central sleeve group (B) and the outer sleeve group (A) with a main support (12), and a propeller (7) arranged on the upper end of the wing body. The telescopic whole is connected with the folding mechanism (9) through a variable-diameter deformation pipe (3); and the telescopic drive mechanism (8) is arranged in the central sleeve group (B). The central sleeve group (B) is composed of a plurality of square-section pipes (Bn) with gradually decreasing cross sections and is sleeved on the folding mechanism (9) as a starting point. The outer sleeve group (A) is composed of a plurality of flat-section pipes (An) with gradually increasing cross sections and is sleeved on the folding mechanism (9) as a starting point to form a wing shape. The folding mechanism (9) is composed of support plates (91), a second hydraulic cylinder (92) and a third hydraulic cylinder (93); the two support plates (91) are vertically and parallelly arranged at a certain distance, are hinged to the main support (12) through connecting shafts (94) on the side far from the variable-diameter deformation pipe (3), are connected with the variable-diameter deformation pipe (3) through universal joints (5) on the lower corner of the other side, are provided with stable locks (6) on the upper corner of the other side, and are locked and connected with the variable-diameter deformation pipe (3) through the stable locks (6); one end of the second hydraulic cylinder (92) is hinged to the main support (12), and the other end is hinged to the variable-diameter deformation pipe (3); one end of the third hydraulic cylinder (93) is hinged to the main support (12), and the other end is hinged to one end of one of the support plates (91).

2. A folding wing according to claim 1, wherein: The central sleeve group (B) comprises four square-section pipes (Bn), and the outer sleeve group (A) comprises four flat-section pipes (An). The right end of the first flat-section pipe (A1) is provided with a zero blocking plate (D0), a circular hole is formed in the center of the zero blocking plate (D0), the outer shaft pipe (2) passes through the circular hole and is matched in rotation, and the inner shaft pipe (1) is sleeved on the inner wall of the outer shaft pipe (2) and is matched in rotation. The center of a first blocking plate (D1) at the left end of the first flat-section pipe (A1) is provided with a square hole, a first square-section pipe (B1) is inserted into the square hole, the left end of the first square-section pipe (B1) is fixedly connected with the square hole, the right end of the first square-section pipe (B1) is communicated with the inner shaft pipe (1), the outer end of the outer shaft pipe (2) is fixedly connected with the variable-diameter deformation pipe (3) of the folding mechanism (9); and the left end of the first flat-section pipe (A1) is sleeved and inserted into the second flat-section pipe (A2) and is slidably connected with the second flat-section pipe (A2). The center of the second blanking plate (D2) of the left end of the second flat section pipe (A2) is provided with a square hole, the second square section pipe (B2) is inserted into the square hole, the left end of the second square section pipe (B2) is fixedly connected with the square hole, and the right end is inserted into the first square section pipe (B1); the left end of the second flat section pipe (A2) is sleeved and inserted into the third flat section pipe (A3) and is in sliding connection with the third flat section pipe (A3); The center of the third blanking plate (D3) of the left end of the third flat section pipe (A3) is provided with a square hole, the third square section pipe (B3) is inserted into the square hole, the left end of the third square section pipe (B3) is fixedly connected with the square hole, and the right end is inserted into the second square section pipe (B2); the left end of the third flat section pipe (A3) is sleeved and inserted into the fourth flat section pipe (A4) and is in sliding connection with the fourth flat section pipe (A4); The center of the fourth blanking plate (D4) of the left end of the fourth flat section pipe (A4) is fixedly provided with the fourth square section pipe (B4), and the right end of the fourth square section pipe (B4) is inserted into the third square section pipe (B3).

3. A folding wing according to claim 2, wherein: The sleeving structure of adjacent square section pipes (Bn): one end of a square section pipe (Bn) with a large cross-sectional area is provided with a middle sealing plate (F), the middle sealing plate (F) is provided with a square hole in the middle, and an adjacent square section pipe (Bn) with a small cross-sectional area is in sliding connection with the square hole; The sleeving structure of adjacent flat section pipes (An): one end of a flat section pipe (An) with a large cross-sectional area is provided with a side sealing plate (E), the side sealing plate (E) is provided with a hole matched with the shape of the wing in the middle, and an adjacent flat section pipe (An) with a small cross-sectional area is in sliding connection with the hole.

4. A folding wing according to claim 2, wherein: The inner shaft pipe (1) extends out of the outer shaft pipe (2), the end of the extended inner shaft pipe (1) is connected with a turbine gear ring (11) matched therewith, the turbine gear ring (11) is connected with a turbine steering engine (4), the turbine steering engine (4) is fixed on the inner wall of the variable-diameter deformation pipe (3) and is in meshing connection with the turbine gear ring (11) to drive the inner shaft pipe (1) and the outer shaft pipe (2) to rotate in cooperation with each other; one end of the variable-diameter deformation pipe (3) is a small circular end, the other end is a large square end, the outer end of the outer shaft pipe (2) is connected with the small circular end, and the folding mechanism (9) is connected with the large square end.

5. A folding wing according to claim 1 or 2, wherein: The telescopic driving mechanism (8) is specifically that a large circular hole is formed in the center of the right end face of the third square section pipe (B3), a first hydraulic cylinder (80) passes through the large circular hole and is fixedly connected with the right end face of the second square section pipe (B2), a small circular hole is formed in the center of the right end face of the second square section pipe (B2), a piston rod of the first hydraulic cylinder (80) extends out of the small circular hole and is fixedly connected with a connecting rod (10) fixed in the inner shaft pipe (1); a first pulley (81) is fixed to the tail of the first hydraulic cylinder (80), one end of a first rope (85) is fixed to the connecting rod (10), the other end passes through the right end faces of the second square section pipe (B2) and the third square section pipe (B3) in sequence, passes around the first pulley (81) and is fixed to the right end inside the third square section pipe (B3). The third square section pipe (B3) is fixed with a second pulley (82) at the right inner end and a third pulley (83) at the left inner end. The second rope (86) is fixed at one end with a connecting rod on the first hydraulic cylinder (80) and at the other end is wound around the second pulley (82) and connected to the right end of the fourth square section pipe (B4). The third rope (87) is fixed at one end to the right end of the fourth square section pipe (B4) and at the other end is wound around the third pulley (83) and fixed to the right inner end of the second square section pipe (B2) through the right end of the third square section pipe (B3); The fourth square section pipe (B4) is fixed with a fourth pulley (84) at the right outer end. The fourth rope (88) is fixed at one end to the right outer end of the third square section pipe (B3) and at the other end is fixed to the left inner end of the first square section pipe (B1) through the second square section pipe (B2) and around the fourth pulley (84); The right end of the fourth square section pipe (B4) is provided with a through hole (B41) for the free entry and exit of the first hydraulic cylinder (80) and the first pulley (81) fixed thereto.

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