Clamping mechanism for mounting cylindrical workpiece

Abstract

The utility model relates to a clamping mechanism, in particular to a clamping mechanism for installing a cylindrical workpiece, which comprises a stand column, an upper lifting assembly, a lower lifting assembly, an upper supporting arm and a lower supporting arm, an upper lifting assembly and a lower lifting assembly which enable the upper supporting arm and the lower supporting arm to ascend and descend are arranged on the upper portion and the lower portion of the fixing plate respectively, guide rails are fixed to the two sides of the front face of the stand column respectively, an upper moving plate and a lower moving plate are arranged on the guide rails in a sliding mode, and the upper supporting arm and the lower supporting arm are fixed to the upper moving plate and the lower moving plate respectively. The upper supporting arm and the lower supporting arm are driven to ascend and descend through the upper lifting assembly and the lower lifting assembly, the upper semi-ring clamping hoop and the lower semi-ring clamping hoop are clamped outside an aero-generator case, the upper semi-ring clamping hoop and the lower semi-ring clamping hoop clamp a cylindrical workpiece and reliably fix the cylindrical workpiece, and the clamping device is simple in structure, convenient to use and high in practicability. And accurate positioning can be realized in the clamping and mounting process of the cylindrical workpiece.

Description

Technical Field

[0001] The utility model relates to a clamping mechanism, in particular to a clamping mechanism for installing cylindrical workpieces. Background Art

[0002] As is known, the installation of an aero-generator casing is one of the important links in aircraft maintenance. The existing installation method often adopts a hoisting method. However, since the casing of the aero-generator is cylindrical and needs to be hoisted and installed, due to its large volume and small installation clearance, it is very difficult to accurately position it during the installation process, and it is easy to cause bumps during multiple position adjustments during the hoisting process. Therefore, it has become a basic requirement for those skilled in the art to propose a mechanism for clamping the casing of the aero-generator and then assembling it. Summary of the Invention

[0003] In order to overcome the deficiencies in the background art, the utility model discloses a clamping mechanism for installing cylindrical workpieces.

[0004] In order to achieve the above-mentioned invention purpose, the utility model adopts the following technical solutions:

[0005] A clamping mechanism for installing cylindrical workpieces includes a column, an upper lifting component, a lower lifting component, an upper support arm and a lower support arm. The column is in an "n" shape and is fixed on the upper surface of a bottom plate. A fixing plate is fixed behind the column. An upper lifting component and a lower lifting component for lifting the upper support arm and the lower support arm are respectively arranged at the upper and lower parts of the fixing plate. Guide rails are respectively fixed on both sides in front of the column. An upper moving plate and a lower moving plate are slidably arranged on the guide rails. The upper support arm and the lower support arm are respectively fixed on the upper moving plate and the lower moving plate. The upper support arm includes upper connecting ear plates fixed on both sides of the middle part of the upper moving plate, a connecting arm hinged to the outer edge of the upper connecting ear plate through a hinge hinge, and an upper supporting plate fixed in front of the connecting arm. The lower support arm includes lower connecting ear plates and lower supporting plates. The lower connecting ear plates are fixed on both sides of the middle part of the lower moving plate 9. The lower supporting plates are respectively arranged at the lower edges of the lower connecting ear plates. The supporting surfaces of the two lower supporting plates are on the same circumference.

[0006] For the clamping mechanism for installing cylindrical workpieces, the bottom plate is in a "pin" shape, and at least one universal wheel is arranged at the lower part near the edge of each side thereof.

[0007] For the clamping mechanism for installing cylindrical workpieces, round holes are respectively formed in the upper connecting ear plates and the upper end surfaces of the connecting arms. A pin is arranged in the round holes. The pin includes an upper card and clamping columns on both sides of the lower part of the upper card. The clamping columns are respectively inserted into the round holes.

[0008] The clamping mechanism for mounting cylindrical workpieces includes an upper lifting assembly comprising an upper handwheel, a worm gear reducer, a gear, and a rack. The worm gear reducer is fixed to the upper part of the fixed plate and located between the two arms of the column. A gear is fixed to the output end of the worm gear reducer, and the rack is vertically fixed to the upper moving plate. The gear and the rack are meshed together.

[0009] The clamping mechanism for mounting cylindrical workpieces includes a lower lifting assembly comprising a lower handwheel, a worm gear reducer, a gear, and a rack. The worm gear reducer is fixed to the lower part of the fixed plate and located between the two arms of the column. A gear is fixed to the output end of the worm gear reducer, and the rack is vertically fixed to the lower moving plate. The gear and the rack are meshed together.

[0010] The clamping mechanism for mounting cylindrical workpieces includes an upper support plate that is configured as a stepped plate, with the lower stepped surfaces of the two upper support plates arranged in a left-right correspondence, and a support plate ball handle fixed on each of the stepped surfaces of the upper support plates.

[0011] The clamping mechanism for mounting cylindrical workpieces has an upper connecting ear plate and a connecting arm that are vertically arranged. The connecting arm is a downwardly inclined rhomboid shape, and a reinforcing rib is fixed behind the upper connecting ear plate.

[0012] The clamping mechanism for mounting cylindrical workpieces further includes a movable push rod assembly located at the lower part of the fixed plate. The movable push rod assembly includes a connecting plate fixed at the lower part between the two arms of the column, a movable handwheel, and a push rod. The connecting plate is located at the lower part of the fixed plate and has a threaded hole. The threaded section of the push rod is rotatably connected to the threaded hole. The movable handwheel is fixedly connected to the front end of the threaded section of the push rod. The push rod passes through a vertical elongated hole on the lower moving plate and is located at the lower part between the two lower support arms.

[0013] The clamping mechanism for mounting cylindrical workpieces has wool felt fixed on both the upper and lower support plates.

[0014] Due to the adoption of the above technical solution, this utility model has the following beneficial effects:

[0015] The clamping mechanism for installing cylindrical workpieces described in this utility model places the upper and lower half-ring clamps on the upper and lower support arms, respectively. The upper and lower lifting components drive the upper and lower support arms to lift and lower, clamping the upper and lower half-ring clamps onto the outside of the aircraft generator casing. During installation, the locking pin is pulled out, opening the hinge between the upper connecting ear plate and the connecting arm, allowing the upper and lower half-ring clamps to clamp and reliably fix the cylindrical workpiece, achieving rapid installation of the cylindrical workpiece. This utility model has a simple structure, is easy to use, and can accurately position the cylindrical workpiece during clamping and installation. Attached Figure Description

[0016] Figure 1 This is a front structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the rear structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of this utility model in use.

[0019] In the diagram: 1. Column; 2. Guide rail; 3. Upper moving plate; 4. Upper support arm; 5. Upper support plate; 6. Lower support arm; 7. Lower support plate; 8. Base plate; 9. Lower moving plate; 10. Top rod; 11. Locking pin; 12. Connecting arm; 13. Support plate ball handle; 14. Reinforcing rib; 15. Fixing plate; 16. Upper handwheel; 17. Lower handwheel; 18. Movable handwheel; 19. Upper connecting ear plate; 20. Lower connecting ear plate; 21. Connecting plate; 22. Hinge; 23. Upper half-ring clamp; 24. Lower half-ring clamp. Detailed Implementation

[0020] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0021] Combined with appendix Figure 1-3 The clamping mechanism for mounting cylindrical workpieces includes a column 1, an upper lifting assembly, a lower lifting assembly, an upper support arm 4, and a lower support arm 6. The column 1 is n-shaped and fixed to the top of the base plate 8. A fixing plate 15 is fixed to the rear of the column 1. The upper and lower parts of the fixing plate 15 are equipped with an upper lifting assembly and a lower lifting assembly for raising and lowering the upper support arm 4 and the lower support arm 6, respectively. The upper lifting assembly includes an upper handwheel 16, a worm gear reducer, a gear, and a rack. The worm gear reducer is fixed to the upper part of the fixing plate 15 and located between the two arms of the column 1. A gear is fixed to the output end of the worm gear reducer, and the rack is vertically fixed to the upper moving plate 3. The gear and rack are meshed together. The lower lifting assembly includes a lower handwheel 16. 7. Worm gear reducer, gear and rack: The worm gear reducer is fixed to the lower part of the fixed plate 15 and located between the two arms of the column 1. The output end of the worm gear reducer is fixed with a gear, and the rack is vertically fixed on the lower moving plate 9. The gear and rack are meshed together. The worm gear reducer, in conjunction with the gear and rack transmission, drives the upper moving plate 3 and the lower moving plate 9 to rise and fall respectively, realizing the engagement and disengagement of the upper half-ring clamp 23 and the lower half-ring clamp 24. A worm gear reducer with a reduction ratio of 60:1 can be selected to ensure that when the handwheel stops running, the upper and lower lifting components can be braked, realizing a reliable reverse locking function and playing a very important safety protection role.

[0022] On both sides in front of the column 1, guide rails 2 are fixedly installed. An upper moving plate 3 and a lower moving plate 9 are slidably arranged on the guide rails 2. When the worm and worm gear reducer drives the gear and rack transmission, the upper moving plate 3 and the lower moving plate 9 both move up and down along the guide rails 2. Upper support arms 4 and lower support arms 6 are respectively fixed on the upper moving plate 3 and the lower moving plate 9. The upper support arm 4 includes upper connecting ear plates 19 fixed on both sides of the middle part of the upper moving plate 3, connecting arms 12 hingedly connected to the outer edges of the upper connecting ear plates 19 through hinge hinges 22, and upper support plates 5 fixed in front of the connecting arms 12. The upper half-ring clamp 23 is placed on the supporting surfaces of the upper support plate 5 and the upper connecting ear plate 19. Round holes are provided on the upper end surfaces of the upper connecting ear plate 19 and the connecting arm 12. A pin 11 is arranged in the round holes. The pin 11 includes an upper card and clamping columns on both sides of the lower part of the upper card. The clamping columns are respectively inserted into the round holes. When the connecting arm 12 needs to rotate, the pin 11 can be pulled out. The lower support arm 6 includes lower connecting ear plates 20 and lower support plates 7. The lower connecting ear plates 20 are fixed on both sides of the middle part of the lower moving plate 9. The lower support plates 7 are respectively arranged at the lower edges of the lower connecting ear plates 20. The supporting surfaces of the two lower support plates 7 are on the same circumference. The lower half-ring clamp 24 is placed on the supporting surfaces of the lower support plate 7 and the lower connecting ear plate 20. Further, the bottom plate 8 is in a "pin" shape, and at least one universal wheel is provided at the lower part near the edge of each of its four corners. Designing the bottom plate 8 as a "pin" shape structure is beneficial to the stability of the center of gravity.

[0023] Further, the upper support plate 5 is arranged as a stepped plate. The lower stepped surfaces of the two upper support plates 5 are arranged corresponding to each other left and right. On the upper stepped surfaces of the upper support plates 5, support plate ball handles 13 are fixedly installed. The support plate ball handles 13 are used to make the connecting arm 12 and the upper support plate 5 rotate around the hinge hinge 22, so as to reserve space for the buckling installation of the upper half-ring clamp 23 and the lower half-ring clamp 24.

[0024] Further, the upper connecting ear plate 19 and the connecting arm 12 are perpendicularly arranged. The connecting arm 12 is in a rhombus shape that slopes downward. A reinforcing rib 14 is fixed on the back of the upper connecting ear plate 19.

[0025] Further, it further includes a movable ejector rod assembly arranged at the lower part of the fixed plate 15. The movable ejector rod assembly includes a connecting plate 21 fixed at the lower part between the two arms of the column 1, a movable handwheel 18 and an ejector rod 10. The connecting plate 21 is located at the lower part of the fixed plate 15. A threaded hole is provided on the connecting plate 21. The threaded rod section of the ejector rod 10 is rotatably connected in the threaded hole. The rear end of the threaded rod of the ejector rod 10 is fixedly connected with the movable handwheel 18. The ejector rod 10 passes through the vertical long hole on the lower moving plate 9 and is located at the lower part between the two lower support arms 6. The movable ejector rod assembly is used to prevent the cylindrical workpiece from sliding downwards.

[0026] The clamping mechanism for mounting cylindrical workpieces described in this utility model is used such that, during operation, the aircraft generator is located on a fixed frame, and the casing of the aircraft generator is suspended outside the fixed frame. By pushing the base plate 8, it moves to the front of the fixed frame. At this time, the casing of the aircraft generator is placed between the upper half-ring clamp 23 and the lower half-ring clamp 24. The push rod 10 extends by rotating the movable handwheel 18 and presses against the front end face of the aircraft generator casing, removing the baffle plate on the original fixed frame. A movable push rod assembly is provided to replace the baffle plate on the fixed frame where the aircraft generator is placed. In the existing environment, the aircraft generators are arranged sequentially on the fixed frame, and the rotating baffle plate at the front end of the fixed frame blocks the front end face of the aircraft generator casing to prevent it from sliding down the fixed frame.

[0027] The extended ear plates on both sides of the upper half ring clamp 23 are placed on the lower step surface of the two upper support plates 5, and the outer arc of the lower half ring clamp 24 is placed on the two inclined lower support plates 7. Wool felt is fixed on the upper support plate 5 and the lower support plate 7, as well as on the upper connecting ear plate 19 and the lower connecting ear plate 20 of the upper half ring clamp 23 and the lower half ring clamp 24, which effectively avoids wear on the outer circular surface of the upper half ring clamp 23 and the lower half ring clamp 24.

[0028] Rotating the lower handwheel 17 of the lower lifting assembly clockwise causes the lower moving plate 9 to move upward along the guide rail 2, bringing the lower circular surface of the aircraft generator casing into contact with the inner circular surface of the lower half-ring clamp 24. Rotating the upper handwheel 16 of the upper lifting assembly counterclockwise causes the upper moving plate 3 to move downward along the guide rail 2, bringing the upper circular surface of the aircraft generator casing into contact with the inner circular surface of the upper half-ring clamp 23. Specifically, the working principle of the upper and lower lifting assemblies is as follows: the rotation of the upper or lower handwheel causes the worm gear reducer to rotate, which in turn drives the rack to move upward or downward, thereby moving the upper moving plate 3 and the lower moving plate 9. When the upper moving plate 3 and the lower moving plate 9 are about to contact... At this time, the upper support plate 5 is blocking the upper half ring clamp 23 and the lower half ring clamp 24, preventing the extension ear plates on both sides from being fixed. At this time, the locking pin 11 is pulled out, and the support plate ball handle 13 is pulled outward. The connecting arm 12 and the upper support plate 5 move outward to both sides under the action of the hinge 22, so that the extension ear plates on both sides of the upper half ring clamp 23 separate from the upper support plate 5 and fall on the lower half ring clamp 24. The extension ear plates of the upper half ring clamp 23 and the lower half ring clamp 24 can be fixed with bolts. The upper half ring clamp 23 and the lower half ring clamp 24 are connected to form a complete circular ring structure, realizing the accurate positioning of the upper half ring clamp 23 and the lower half ring clamp 24, and realizing the accurate clamping of the upper half ring clamp 23 and the lower half ring clamp 24.

[0029] The parts of this utility model not described in detail are existing technologies.

[0030] The embodiments selected herein for the purpose of disclosing the inventive objectives of this utility model are currently considered appropriate; however, it should be understood that this utility model is intended to include all variations and modifications of the embodiments that fall within the scope of this concept and utility model.

Claims

1. A clamping mechanism for mounting cylindrical workpieces, comprising a column, an upper lifting assembly, a lower lifting assembly, an upper support arm, and a lower support arm, characterized in that: The column is in an "n" shape and is fixed on the upper surface of the bottom plate. A fixed plate is fixed behind the column. An upper lifting component and a lower lifting component for lifting the upper support arm and the lower support arm are provided at the upper and lower parts of the fixed plate respectively. Guide rails are fixed on both sides in front of the column. An upper moving plate and a lower moving plate are slidably arranged on the guide rails. The upper support arm and the lower support arm are respectively fixed on the upper moving plate and the lower moving plate. The upper support arm includes upper connecting ear plates fixed on both sides of the middle part of the upper moving plate, a connecting arm hinged to the outer edge of the upper connecting ear plate through a hinge hinge, and an upper support plate fixed in front of the connecting arm; the lower support arm includes lower connecting ear plates and lower support plates. The lower connecting ear plates are fixed on both sides of the middle part of the lower moving 9, and the lower support plates are respectively arranged at the lower edges of the lower connecting ear plates. The support surfaces of the two lower support plates are on the same circumference.

2. The clamping mechanism for mounting cylindrical workpieces according to claim 1, characterized in that: The bottom plate is in a "pin" shape, and at least one universal wheel is provided at the lower part of each side near the edge.

3. The clamping mechanism for mounting cylindrical workpieces according to claim 1, characterized in that: in Round holes are provided on the upper end surfaces of the upper connecting ear plates and the connecting arms. A pin is arranged in the round holes. The pin includes an upper card and pin columns on both sides of the lower part of the upper card. The pin columns are respectively inserted into the round holes.

4. The clamping mechanism for mounting cylindrical workpieces according to claim 1, characterized in that: The upper lifting component includes an upper hand wheel, a worm and gear reducer, a gear and a rack. The worm and gear reducer is fixed on the upper part of the fixed plate and is located between the two arms of the column. A gear is fixed at the output end of the worm and gear reducer. The rack is vertically fixed on the upper moving plate, and the gear is meshed with the rack.

5. The clamping mechanism for mounting cylindrical workpieces according to claim 1, characterized in that: The lower lifting component includes a lower hand wheel, a worm and gear reducer, a gear and a rack. The worm and gear reducer is fixed on the lower part of the fixed plate and is located between the two arms of the column. A gear is fixed at the output end of the worm and gear reducer. The rack is vertically fixed on the lower moving plate, and the gear is meshed with the rack.

6. The clamping mechanism for mounting cylindrical workpieces according to claim 1, characterized in that: The upper support plate is arranged as a stepped plate. The lower stepped surfaces of the two upper support plates are arranged corresponding to each other left and right. A support plate ball handle is fixed on the upper stepped surface of the upper support plate.

7. The clamping mechanism for mounting cylindrical workpieces according to claim 1, characterized in that: The upper connecting ear plate and the connecting arm are arranged perpendicularly. The connecting arm is in a diamond shape inclined downward. A reinforcing rib is fixed behind the upper connecting ear plate.

8. The clamping mechanism for mounting cylindrical workpieces according to claim 1, characterized in that: It further includes a movable ejector rod component arranged at the lower part of the fixed plate. The movable ejector rod component includes a connecting plate fixed at the lower part between the two arms of the column, a movable hand wheel and an ejector rod. The connecting plate is located at the lower part of the fixed plate. A threaded hole is provided on the connecting plate. The threaded rod segment of the ejector rod is rotatably connected in the threaded hole. A movable hand wheel is fixed at the front end of the threaded rod of the ejector rod. The ejector rod passes through the vertical long hole on the lower moving plate and is located at the lower part between the two lower support arms.

9. The clamping mechanism for mounting cylindrical workpieces according to claim 1, characterized in that: Felt is fixed on both the upper support plate and the lower support plate.

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