Jack for jacking aircraft wings

Abstract

The invention discloses a jack for jacking aircraft wings, and relates to the field of aircraft maintenance, the jack comprises an action cylinder and a support frame, the other end of the support frame is provided with a support disc, one side of the support frame is provided with a lifting wheel oil cylinder, the output end of the lifting wheel oil cylinder is connected with a steering wheel, the steering wheel is connected with a connecting rod, and the connecting rod is connected with the action cylinder. A directional wheel matched with the connecting rod is arranged on the side, away from the steering wheel, of the supporting frame, the middle position of the directional wheel is sleeved with a scraper, and a material groove is formed in the scraper. Stone sundries on the ground can be scooped up by a scraping plate, then a cover plate is extruded through the gravity of the scraping plate to enable the stone sundries to fall into a material groove, a steering wheel is driven to rotate through recovery of a lifting wheel oil cylinder, and at the moment, a directional wheel is adjusted by a certain angle under cooperation of a crank and a connecting rod; overall adjustment is achieved only through cooperation of the lifting wheel oil cylinders and the connecting rods.

Description

Technical Field

[0001] The invention relates to the field of aircraft maintenance, in particular to a jack used for lifting aircraft wings. Background Art

[0002] Aircraft wings are an important part of an aircraft. Their main function is to generate lift so that the aircraft can fly in the air. The shape, structure and design of the wings are crucial to the performance and flight stability of the aircraft. Therefore, staff need to inspect and maintain them regularly on a daily basis.

[0003] In the existing wing inspection and maintenance process, a jack is required to lift the wing as a whole. The jack is hydraulically driven to lift and lower, and is supported by three support frames so that the jack can withstand a certain horizontal load while vertically lifting the rated lifting weight. The operation mode is manual or pneumatic and electric dual operation mode. In the existing technology, the jack is mostly moved by installing a moving wheel. Among them, in the Chinese patent with announcement number CN220374763U, after the moving wheel moves to the specified position, the support plate is adjusted by the cooperation of the screw sleeve, ratchet wrench and ball screw so that the jack is in the specified position. Since the overall gravity of the jack is large, it will waste too much manpower and material resources in the process of short-distance movement. At the same time, before the jack is lifted, it is necessary to confirm that there are no stones or other debris that may affect the stability in the area where the chassis is located. Therefore, the staff needs to clean the area where it is located every time it moves, which increases the overall operating burden.

[0004] In summary, the above structure will waste too much manpower and material resources when facing short-distance movement in actual use. At the same time, the staff needs to clean the area where the jack is located every time it moves before lifting, which increases the overall operating burden. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a jack for lifting aircraft wings to solve the technical problem that when facing short-distance movement, excessive manpower and material resources will be wasted. At the same time, the jack requires workers to clean the area where it is located every time it moves before lifting, which increases the overall operating burden.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a jack for lifting an aircraft wing, comprising an operating cylinder and a support frame, wherein the support frame is provided with an array, one end of which is connected to the outer wall of the operating cylinder, and the other end of each support frame is provided with a support plate, and a lifting wheel cylinder is provided on one side of the support frame, and a steering wheel is connected to the output end of the lifting wheel cylinder, and the steering wheel is connected to a connecting rod, and a directional wheel cooperating with the connecting rod is provided on the side of the support frame away from the steering wheel;

[0007] The scraping plate is sleeved at the middle position of the directional wheel, the scraping plate is internally provided with a material groove, and a cover plate is rotationally arranged at the top end of the material groove, and the cover plate is connected with the scraping plate through a torsion spring.

[0008] By adopting the above technical scheme, in the process that the action cylinder and the support frame move as a whole, the scraping plate can shovel the stones and sundries on the ground, and then the stones and sundries can be pressed into the material groove through the gravity of the scraping plate, so that no objects affecting the overall balance can be generated in the moving area on the moving path. The lifting wheel oil cylinder is used for recycling and driving the steering wheel to rotate. At this time, the directional wheel is adjusted by a certain angle under the cooperation of the crank and the connecting rod. In this process, the directional wheel is separated from the ground, and the support disc supports the whole. When moving a short distance, the lifting wheel oil cylinder is used for adjusting the whole under the cooperation of the connecting rod.

[0009] The top of the action cylinder is connected with an adjustable screw rod, and the top of the adjustable screw rod is connected with a top head.

[0010] As preferred, the height is adjusted by rotating the adjustable screw rod, the hydraulic lifting height is supplemented, the adjustable performance of lifting is increased, the top head at the top is in spherical contact with the lifting point at the lower end of the wing during the lifting process, the unbalanced load can be reduced, the top head can be concave or convex according to different requirements of the lifting point of the wing of the airplane.

[0011] The material groove is in a trapezoidal shape as a whole, and a lower material groove is arranged at the bottom of the material groove, and a baffle is arranged in the lower material groove.

[0012] As preferred, in the process that the top of the scraping plate moves in an inclined manner, the stones and sundries entering the material groove through the cover plate can fall on the trapezoidal surface of the material groove, so that the overall weight is prevented from increasing, and the baffle is prevented from slipping off. When the scraping plate rotates under the cooperation of the lifting wheel oil cylinder and the directional wheel, the top of the scraping plate is arranged in a horizontal manner, so that the stones and sundries in the material groove can slide to the bottom under the action of the trapezoidal surface. Subsequently, a worker can open the baffle to clean the stones and sundries inside the baffle regularly, and the practicability of the device is improved.

[0013] One end of the steering wheel is connected with a crank, and the other end of the crank is hingedly connected with a connecting rod.

[0014] As preferred, when the steering wheel rotates under the driving of the lifting wheel oil cylinder, the crank at one side of the steering wheel rotates, and the connecting rod is elongated to one side. Since one end of the connecting rod is hingedly connected with the rotating shaft of the directional wheel, the rotating shaft rotates when the connecting rod is elongated, so that the directional wheel is adjusted in angle.

[0015] The present invention is further configured such that a piston rod is provided in the operating cylinder, wherein the outer wall of the piston rod is configured as a trapezoidal thread as a whole.

[0016] Preferably, when the piston rod cooperates with the hydraulic pump and hydraulic oil to rise, it can drive the jack to rise, thereby achieving contact and jacking of the bottom of the wing, and mechanical self-locking is performed through the thread to ensure safe and reliable jacking.

[0017] The present invention is further configured such that a hydraulic oil tank is provided on the outer wall of the actuator, and a hydraulic pump cooperating with the hydraulic oil tank is provided on one side of the actuator.

[0018] Preferably, the hydraulic oil in the hydraulic oil tank is drawn out and discharged into the actuator cylinder under the action of the hydraulic pump. In this process, the piston rod in the actuator cylinder is driven upward, so that the top head contacts the wing and the lifting work of the wing is completed.

[0019] The present invention is further configured such that the bottom ends of the support frames are connected to adjusting screw rods, wherein one end of the adjusting screw rods is connected to the support plate via a universal shaft.

[0020] Preferably, the adjusting screw rod can be extended and contracted according to the inclination of the ground, ensuring that the action cylinder is always in a vertical upward setting, further improving the overall practicality of the device, and the connection of the universal shaft ensures that the support plate itself can be adjusted at multiple angles.

[0021] The present invention is further configured such that a traction rod is rotatably provided on one side of the steering wheel, wherein the outer wall of the traction rod is configured to be rough.

[0022] Preferably, the traction rod facilitates the staff to push the device as a whole, and the rough outer wall can increase the friction between the device and the staff's hands to prevent the staff's hands from slipping during the pushing process.

[0023] The present invention is further configured such that a reversing valve cooperating with the hydraulic pump and the lifting wheel cylinder is provided on the support frame.

[0024] Preferably, the reversing valve is manually operated and the oil circuit can be switched manually, so that the lifting wheel cylinder can have dual oil circuits and freely switch telescopic movements, thereby improving the overall practicality of the device.

[0025] The present invention is further configured such that the inner wall of the trough is smooth.

[0026] As a preferred embodiment, the smooth setting effectively reduces the sliding friction between the inner wall of the trough and the stones, preventing the stones from accumulating on the inner wall of the trough. At the same time, during the angle adjustment of the scraper, the stones and debris in the trough are uniformly moved to the lower trough at the bottom, ensuring that the stones and debris inside are uniformly processed.

[0027] In summary, the present invention mainly has the following beneficial effects:

[0028] 1. The present invention provides a lifting wheel cylinder on one side of the bracket. When the device as a whole moves to a specified position, the lifting wheel cylinder is retracted to drive the steering wheel to rotate. At this time, the crank and the connecting rod cooperate to adjust the fixed wheel to a certain angle. In this process, the fixed wheel and the steering wheel are separated from the ground, and the support plate supports them as a whole. When moving a short distance subsequently, the overall adjustment is achieved only through the action of the lifting wheel cylinder in cooperation with the connecting rod, which saves a lot of manpower and material resources and improves the efficiency of the overall movement and adjustment.

[0029] 2. The present invention provides a scraper at the front end of the directional wheel. During the overall movement of the operating cylinder and the support frame, the scraper will scoop up stones and debris on the ground, and then squeeze the cover plate through its own gravity to make it fall into the trough, so that on the moving path, no objects that affect the overall balance will appear in its moving area. When the staff subsequently adjust the device over a short distance, there is no need to clean the area, which reduces the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A perspective view of the present invention;

[0031] Figure 2 It is a schematic diagram of the plug structure of the present invention;

[0032] Figure 3 For the present invention Figure 1 A magnified view of middle A;

[0033] Figure 4 is a side view of the present invention;

[0034] Figure 5 This is a structural schematic diagram of the support plate of the present invention in a supporting state;

[0035] Figure 6 It is a schematic diagram of the overall structure of the jack of the present invention;

[0036] Figure 7 This is a schematic diagram of the bottom structure of the scraper of the present invention;

[0037] Figure 8 It is an overall cross-sectional view of the jack of the present invention;

[0038] Figure 9 is a cross-sectional view of a scraper according to the present invention;

[0039] Figure 10 For the present invention Figure 8 Magnified view of B.

[0040] Description of reference numerals:

[0041] 1. Actuating cylinder; 2. Support frame; 3. Adjustable screw; 4. Ejector head; 5. Hydraulic oil tank; 6. Connecting rod; 7. Scraper; 8. Steering wheel; 9. Adjusting screw; 10. Support plate; 11. Steering wheel; 12. Drawbar; 13. Reversing valve; 14. Lifting wheel cylinder; 15. Cover plate; 16. Crank; 17. Discharge chute; 18. Baffle; 19. Material chute; 20. Piston rod; 21. Hydraulic pump. DETAILED DESCRIPTION

[0042] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0043] The following describes an embodiment of the present invention based on its overall structure.

[0044] First embodiment:

[0045] See also Figures 1-10 The jack shown is used for lifting the wing of an aircraft, and includes an action cylinder 1, a support frame 2, a support plate 10, an adjustment mechanism, a cleaning mechanism, and a recovery mechanism. The support frame 2 is provided with three groups, one end of which is connected to the outer wall of the action cylinder 1 and the other end is connected to the support plate. One group of the support frames 2 is provided with a steering wheel 11 and is connected to a traction rod 12. The other two groups of the support frames 2 are provided with a directional wheel 8. The two groups of directional wheels 8 are connected by a rotating shaft, and a scraper 7 is sleeved on the rotating shaft. The staff drives the scraper 7 forward by pushing the traction rod 12. During the movement, stones and debris on the path will be discharged from the sides and top of the scraper 7.

[0046] Since a trough 19 is provided in the scraper 7, and a cover plate 15 is rotatably provided on the top of the trough 19, and the cover plate 15 is connected to the scraper 7 by a torsion spring, when stones and debris slide to the top of the cover plate 15, the cover plate 15 rotates under the action of the gravity of the stones and debris, so that the stones and debris fall into the trough 19. After moving to the designated position, the stones and debris in the area will be effectively cleaned, and when the staff subsequently adjust the device over a short distance, there is no need to clean the area, which reduces the workload of the staff.

[0047] At this time, a lifting wheel cylinder 14 is provided on the support frame 2 at the steering wheel 11, and the steering wheel 11 is connected to the output end of the lifting wheel cylinder 14. When the lifting wheel cylinder 14 is started, the steering wheel 11 is driven to adjust the angle, so that the steering wheel 11 is turned upward, and one end of the steering wheel 11 is connected to a crank 16, and one end of the crank 16 is hinged to the connecting rod 6. When the steering wheel 11 is rotated by the lifting wheel cylinder 14, the crank 16 on one side will rotate accordingly, thereby extending the connecting rod 6 to one side. Since one end of the connecting rod 6 is hinged to the rotating shaft between the fixed wheel 8, when the connecting rod 6 is extended, the rotating shaft will be driven to rotate. In this process, the fixed wheel 8 and the steering wheel 11 are separated from the ground, and the support plate 10 thereof supports them as a whole;

[0048] A hydraulic oil tank 5 is provided on the outer wall of the actuator 1, and a hydraulic pump 21 cooperating with the hydraulic oil tank 5 is provided on one side thereof. Under the action of the hydraulic pump 21, the hydraulic oil in the hydraulic oil tank 5 is extracted and discharged into the actuator 1. In this process, the piston rod 20 in the actuator 1 is driven upward, so that the top head 4 contacts the wing and completes the wing lifting work. When a short distance is subsequently moved, the overall adjustment is achieved only by the action of the lifting wheel cylinder 14 in cooperation with the connecting rod 6, which saves a lot of manpower and material resources and improves the efficiency of the overall movement adjustment.

[0049] Among them, the control execution elements such as the actuator 1, the lifting wheel cylinder 14, the hydraulic oil tank 5 and the hydraulic pump 21 control and adjust the pressure, flow and direction of the liquid in this system. Other specific components are mainly composed of overflow valves, one-way valves, stop valves, reversing valves 13 and other components. The overflow valve mainly plays the role of controlling the system pressure and safety. The one-way valve mainly plays the role of maintaining pressure, and at the same time prevents the hand pump output oil from flowing back and the two groups of pumps from interfering with each other. The stop valve is manually operated and can manually open and close the lifting oil circuit, which can play the role of hydraulic pressure maintenance and flow regulation. The load can be steadily lowered by slowly opening the stop valve. The reversing valve 13 is manually operated and the oil circuit can be manually switched to realize the dual oil circuit action of the lifting wheel cylinder 14 and freely switch the telescopic action. Its specific working principle belongs to the prior art for those skilled in the art, so it is not elaborated in detail in this application.

[0050] In the above embodiment, please refer to Figure 4The top of the action cylinder 1 is connected with an adjustable screw 3, wherein the top of the adjustable screw 3 is connected with a head 4. By rotating the adjustable screw 3, the mechanical height adjustment can be achieved, which can supplement the hydraulic lifting height and increase the adjustable performance of the lifting. The height can be adjusted in advance for different models to reduce the workload of hydraulic adjustment. At the same time, the head 4 on the top contacts the lifting point of the lower end of the wing through a spherical surface during the jacking process, which can reduce a certain amount of eccentric load. The head 4 can be concave or convex according to the different requirements of the jacking point of the aircraft wing, and the materials used for the head 4, adjustable screw 3, action cylinder 1, traction rod 12, support plate 10 and walking wheel meet the use requirements and are corrosion-resistant materials. The corrosion resistance or surface treatment of the material ensures that the jack is prevented from rusting during field use and storage.

[0051] In the above-mentioned embodiments 1 and Figure 8 Please refer to the figure for details. An adjusting screw rod 9 is connected to the bottom end of the support frame 2, wherein one end of the adjusting screw rod 9 is connected to the support plate 10 through a universal shaft. The adjusting screw rod 9 can be extended and retracted according to the inclination of the ground, ensuring that the action cylinder 1 is always in a vertical upward setting, further improving the overall practicality of the device, and the connection of the universal shaft ensures that the support plate 10 itself can be adjusted at multiple angles. At the same time, a piston rod 20 is provided in the action cylinder 1, wherein the outer wall of the piston rod 20 is arranged in a trapezoidal thread as a whole. When the piston rod 20 cooperates with the hydraulic pump 21 and the hydraulic oil to rise, it can drive the jack 4 to rise, thereby realizing contact jacking of the bottom of the wing, and mechanical self-locking is performed through the thread to ensure that the jacking is safe and reliable.

[0052] Second embodiment:

[0053] See also Figure 5 and Figure 9 The jack shown is a jack for lifting aircraft wings, and its overall structure is similar to that of Example 1, wherein the material trough 19 is arranged in a trapezoidal shape as a whole, and a discharge trough 17 is provided at the bottom of the material trough 19, wherein a baffle 18 is provided in the discharge trough 17. During the process of the overall tilting movement of the top of the scraper 7, stones and debris entering the material trough 19 through the cover plate 15 will fall onto the trapezoidal surface of the material trough 19 to prevent the increase of its overall weight, thereby causing the baffle 18 to slip. When the scraper 7 rotates in cooperation with the directional wheel 8 under the action of the lifting wheel cylinder 14, the top of the scraper 7 is arranged horizontally. At this time, the stones and debris in the material trough 19 will slide to the bottom under the action of the trapezoidal surface. Subsequent staff can regularly open the baffle 18 to take out the stones and debris through the discharge trough 17, so as to clean the stone impurities inside it, thereby improving the overall practicality of the device.

[0054] The present invention is specifically used in the following manner: when in use, the staff uses the traction rod 12 to cooperate with the directional wheel 8 and the steering wheel 11 at the bottom to move the device. Since the front end of the directional wheel 8 is provided with a scraper 7, the scraper 7 will scoop up stones and debris at the front end of the device during the movement. Since a material trough 19 is provided in the scraper 7, and a cover plate 15 is provided on the top of the material trough 19 through a torsion spring, the scooped stones and debris will open the cover plate 15 under the action of their own gravity, so that the stones and debris are uniformly discharged into the material trough 19. When the device is moved to a designated position, there is no need to clean the area, thereby reducing the workload of the staff.

[0055] After the device as a whole is moved to the designated position through the cooperation of the directional wheel 8 and the steering wheel 11, the lifting wheel cylinder 14 on one side of the support frame 2 is started, which drives the steering wheel 11 to rotate, so that the steering wheel 11 is lifted off the ground. In the process of the rotation of the steering wheel 11, the crank 16 and the connecting rod 6 cooperate to adjust the angle of the directional wheel 8 as a whole. In this process, the support plate 10 is in contact with the ground as a whole, and the support plate 10 is accurately adjusted, which effectively prevents the device as a whole from tilting due to the support plate 10.

[0056] In addition, a hydraulic oil tank 5 is provided on the outer wall of the actuator cylinder 1, and a hydraulic pump 21 cooperating with the hydraulic oil tank 5 is provided on one side thereof. Under the action of the hydraulic pump 21, the hydraulic oil in the hydraulic oil tank 5 will be drawn and discharged into the actuator cylinder 1. In this process, the piston rod 20 in the actuator cylinder 1 is driven to push upward, so that the top head 4 contacts the wing and completes the lifting work of the wing. When a short distance is subsequently moved, the overall adjustment is achieved only by cooperating with the connecting rod 6 under the action of the lifting wheel cylinder 14, which saves a lot of manpower and material resources and improves the efficiency of the overall movement adjustment.

[0057] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A jack for lifting an aircraft wing, comprising an operating cylinder (1) and a support frame (2), wherein the support frame (2) is provided with an array, one end of which is connected to the outer wall of the operating cylinder (1), and is characterized in that: The other end of the support frame (2) is provided with a support plate (10), and a lifting wheel cylinder (14) is provided on one side of the support frame (2), a steering wheel (11) is connected to the output end of the lifting wheel cylinder (14), the steering wheel (11) is connected to a connecting rod (6), and a directional wheel (8) cooperating with the connecting rod (6) is provided on the side of the support frame (2) away from the steering wheel (11); A scraper (7) is sleeved at the middle position of the directional wheel (8), a material trough (19) is provided in the scraper (7), and a cover plate (15) is rotatably provided at the top end of the material trough (19), and the cover plate (15) is connected to the scraper (7) via a torsion spring.

2. The jack for lifting an aircraft wing according to claim 1, characterized in that: The top of the action cylinder (1) is connected to an adjustable screw (3), wherein the top of the adjustable screw (3) is connected to a head (4).

3. The jack for lifting an aircraft wing according to claim 1, characterized in that: The material trough (19) is arranged in a trapezoidal shape as a whole, and a material discharge trough (17) is provided at the bottom of the material trough (19), wherein a baffle (18) is provided in the material discharge trough (17).

4. The jack for lifting an aircraft wing according to claim 1, characterized in that: One end of the steering wheel (11) is connected to a crank (16), and one end of the crank (16) is hinged to the connecting rod (6).

5. The jack for lifting an aircraft wing according to claim 1, characterized in that: A piston rod (20) is provided in the operating cylinder (1), wherein the outer wall of the piston rod (20) is provided with a trapezoidal thread as a whole.

6. The jack for lifting an aircraft wing according to claim 1, characterized in that: The outer wall of the operating cylinder (1) is provided with a hydraulic oil tank (5), and one side thereof is provided with a hydraulic pump (21) that cooperates with the hydraulic oil tank (5).

7. The jack for lifting an aircraft wing according to claim 1, characterized in that: The bottom end of each support frame (2) is connected to an adjusting screw rod (9), wherein one end of the adjusting screw rod (9) is connected to the support plate (10) via a universal joint.

8. The jack for lifting an aircraft wing according to claim 1, characterized in that: A traction rod (12) is rotatably provided on one side of the steering wheel (11), wherein the outer wall of the traction rod (12) is provided in a rough shape.

9. The jack for lifting an aircraft wing according to claim 6, characterized in that: The support frame (2) is provided with a reversing valve (13) that cooperates with a hydraulic pump (21) and a lifting wheel oil cylinder (14).

10. The jack for lifting an aircraft wing according to claim 1, characterized in that: The inner wall of the material trough (19) is smooth.

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