A flexible connection structure

Abstract

The present invention relates to the field of flexible connection technology, and specifically to a flexible connection structure, including: a connecting shaft; two flexible mechanisms, the two flexible mechanisms are respectively arranged at both ends of the connecting shaft, the flexible mechanism includes a fixed ring and a fixed column, the fixed column is fixedly connected to one end of the connecting shaft, the side wall of the fixed column away from the connecting shaft is provided with a slot, the inner wall of the slot is rotatably connected to a connecting block through a secondary rod, the side wall of the connecting block is rotatably connected to the inner wall of the fixing ring through a main rod, and the end of the fixing ring away from the connecting shaft is fixedly connected to a mounting ring; a lubricating mechanism, the lubricating mechanism includes two first annular cavities arranged on the inner wall of the fixing ring. The present invention is provided with a flexible mechanism, and under the condition of ensuring that the two mounting rings do not rotate, the connecting shaft can drive the mounting ring to rotate a certain angle, change the position of the drill bit, and set the connection between the drill bit and the drilling machine as a flexible connection.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible connection, and in particular to a flexible connection structure. Background Art

[0002] Before installing components on a PCB board, small holes must be drilled on the board to allow the pins of the components to be inserted, or to make the circuits on different layers conductive up and down. At this time, a PCB drilling machine is needed.

[0003] At present, during the operation of the drilling machine, after the drill bit is installed, its position on the machine body is fixed, and it can only move up and down. However, sometimes when it is necessary to drill a hole at an angle on the workpiece, the position of the drill bit corresponding to the workpiece needs to be changed. The position of the workpiece needs to be adjusted and clamped again, which is cumbersome to operate. In addition, after the position of the workpiece is changed, it is easy for errors to occur in the drilling position on the workpiece. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a flexible connection structure.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A flexible connection structure, comprising:

[0007] Connecting shaft;

[0008] Two flexible mechanisms, the two flexible mechanisms are respectively arranged at both ends of the connecting shaft, the flexible mechanisms include a fixing ring and a fixing column, the fixing column is fixedly connected to one end of the connecting shaft, a side wall of the fixing column away from the connecting shaft is provided with a slot, the inner wall of the slot is rotatably connected to a connecting block through a secondary rod, the side wall of the connecting block is rotatably connected to the inner wall of the fixing ring through a main rod, and the end of the fixing ring away from the connecting shaft is fixedly connected to a mounting ring;

[0009] A lubrication mechanism, the lubrication mechanism includes two first annular cavities opened on the inner wall of the fixed ring, the two first annular cavities are respectively arranged close to the two ends of the main rod, the inner wall of the first annular cavity is fixedly connected with a plurality of first oil outlet pipes connected with the side wall of the main rod, the inner wall of the fixed column is opened with two second annular cavities, the two second annular cavities are respectively arranged close to the two ends of the auxiliary rod, the inner wall of the second annular cavity is fixedly connected with a plurality of second oil outlet pipes connected with the side wall of the auxiliary rod.

[0010] Preferably, the lubrication mechanism further includes an oil storage frame fixedly connected to the inner wall of the fixed ring through a plurality of members. The inner wall of the oil storage frame is hermetically and slidably connected with a first plate and a second plate in sequence from bottom to top. The side wall of the second plate is communicated with the side wall of the fixed ring through a pump oil pipe, and a manual regulating valve is installed in the pump oil pipe. The inner wall of the oil storage frame between the first plate and the second plate is communicated with the inner walls of two first annular cavities and the inner walls of two second annular cavities through one-way oil outlet pipes respectively, and the one-way oil outlet pipes are close to the second plate.

[0011] Preferably, a sliding mechanism for driving the second plate to slide is provided on the fixed column. The sliding mechanism includes a U-shaped plate fixedly connected to the side wall of the fixed column away from the connecting shaft. A first rolling ball is embedded in the side wall of the U-shaped plate away from the fixed column. A second rolling ball is embedded in the side wall of the second plate close to the U-shaped plate. A connecting rod is fixedly connected between the first rolling ball and the second rolling ball.

[0012] Preferably, a limiting mechanism for limiting the position of the first plate is provided in the oil storage frame. The limiting mechanism includes a fixing plate fixedly connected to the inner wall of the oil storage frame. A threaded cylinder is rotatably connected to the side wall of the fixing plate. A rifled rod is threadedly connected to the inner wall of the threaded cylinder. A chute is opened on the inner wall of the oil storage frame close to the mounting ring. A slider is slidably connected to the inner wall of the chute. The side wall of the slider is elastically connected to the inner wall of the chute through a plurality of first springs. A toothed plate is fixedly connected to the side wall of the slider away from the first spring through a bolt. The end of the rifled rod away from the chute is fixedly connected to the side wall of the first plate. A gear is fixedly connected to the side wall of the threaded cylinder away from the first plate. The side wall of the gear meshes with the side wall of the toothed plate.

[0013] Preferably, a plurality of first wedge-shaped plates are fixedly connected to the side wall of the toothed plate away from the gear. A plurality of second wedge-shaped plates are rotatably connected to the inner wall of the chute through a rotating shaft. The side wall of the second wedge-shaped plate is elastically connected to the inner wall of the chute through a plurality of second springs. The horizontal side wall of the first wedge-shaped plate is attached to the horizontal side wall of the second wedge-shaped plate.

[0014] Preferably, a through groove communicating with the side wall of the oil storage frame is opened at the bottom of the chute. A circular groove matching with the inner wall of the fixed ring is opened on the side wall of the mounting ring. A circular ring is fixedly connected to the inner wall of the circular groove. A cover plate is fixedly connected to the side wall of the circular ring through a plurality of screws.

[0015] Preferably, a protective ring is fixedly connected to the side wall of the fixed ring away from the mounting ring. A plurality of arc-shaped grooves are opened on the inner side wall of the protective ring. An arc-shaped plate is slidably connected to the inner wall of the arc-shaped groove. The side wall of the arc-shaped plate away from the arc-shaped groove is attached to the side wall of the fixed column. The side wall of the arc-shaped plate away from the fixed column is fixedly connected to the inner wall of the arc-shaped groove through an elastic capsule. A non-Newtonian fluid is provided in the elastic capsule.

[0016] Compared with the existing technology, the advantages of the present invention are as follows:

[0017] 1. A flexible mechanism is set up. When one of the mounting rings does not rotate, the connecting shaft can drive the other mounting ring to rotate a certain angle to change the position of the drill bit. The connection between the drill bit and the drilling machine is set to a flexible connection. This avoids the need to adjust and clamp the position of the workpiece again when drilling holes at an angle on the workpiece in the prior art. The operation is cumbersome, and after the position of the workpiece is changed, it is easy for errors to occur in the drilling position on the workpiece.

[0018] 2. A lubrication mechanism is provided to lubricate the connection between the main rod side wall and the fixed ring side wall, and to lubricate the connection between the auxiliary rod side wall and the fixed column side wall, so as to avoid that after the fixed column rotates for a long time, the friction between the main rod side wall and the fixed ring side wall and the auxiliary rod side wall and the fixed column side wall will be large, and the friction between the auxiliary rod side wall and the fixed column side wall will be large, which will hinder the normal rotation of the fixed column and affect the normal operation of the flexible connection mechanism.

[0019] 3. By setting a limit mechanism, there is no need to set up an oil storage tank in the flexible connection mechanism to pump oil into the oil storage frame, which reduces its footprint. In the subsequent process, only lubricating oil needs to be added to the oil storage frame, and the lubrication effect on the main rod and the auxiliary rod is guaranteed during the rotation of the fixed column.

[0020] 4. The protection ring and the non-Newtonian liquid are provided to avoid the collision between the fixed column and the side wall of the fixed ring during the rapid rotation during use, thereby protecting the flexible connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A structural schematic diagram of a flexible connection structure proposed by the present invention;

[0022] Figure 2 for Figure 1 Structural diagram of the medium flexible mechanism;

[0023] Figure 3 for Figure 1 Schematic diagram of vertical section structure at the middle main pole;

[0024] Figure 4 for Figure 1 A schematic diagram of the vertical cross-section structure at the middle auxiliary rod;

[0025] Figure 5 for Figure 3 A schematic diagram of the structure enlargement at the center A;

[0026] Figure 6 for Figure 4 A schematic diagram of the structure enlarged at B in the middle;

[0027] Figure 7 for Figure 3 A magnified schematic diagram of the structure at C in the middle;

[0028] Figure 8 for Figure 1 A schematic diagram of the structure from above after the cover plate is removed;

[0029] Fig. 9 for Figure 8 A schematic diagram of the structure at D in the middle is enlarged;

[0030] Fig.10 for Fig. 9 A schematic diagram of the structure enlarged at E in the middle;

[0031] Fig.11 for Figure 7 A schematic diagram of the structure of the middle limit mechanism when viewed from above;

[0032] Fig.12 for Figure 1 Schematic diagram of the rear view structure.

[0033] In the figure: 1, connecting shaft; 2, fixing ring; 3, mounting ring; 4, fixing column; 5, clamping groove; 6, connecting block; 7, auxiliary rod; 8, main rod; 9, first annular cavity; 10, first oil outlet pipe; 11, second annular cavity; 12, second oil outlet pipe; 13, oil storage frame; 14, first plate; 15, second plate; 16, pump oil pipe; 17, one-way oil outlet pipe; 18, shaped plate; 19, first rolling ball; 20, second rolling ball; 21. Connecting rod; 22. Slide groove; 23. Sliding block; 24. First spring; 25. Fixing plate; 26. Threaded barrel; 27. Rifle rod; 28. Gear; 29. ​​Tooth plate; 30. First wedge plate; 31. Second wedge plate; 32. Second spring; 33. Bolt; 34. Through groove; 35. Circular groove; 36. Circular ring; 37. Cover plate; 38. Protective ring; 39. Arc groove; 40. Arc plate; 41. Elastic bag. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Reference Figure 1 - Fig.12A flexible connection structure includes a connecting shaft 1 and two flexible mechanisms, which are respectively arranged at both ends of the connecting shaft 1. The flexible mechanism includes a fixing ring 2 and a fixing column 4. The fixing column 4 is fixedly connected to one end of the connecting shaft 1. A slot 5 is provided on the side wall of the fixing column 4 away from the connecting shaft 1. The inner wall of the slot 5 is rotatably connected to a connecting block 6 through a secondary rod 7. The side wall of the connecting block 6 is rotatably connected to the inner wall of the fixing ring 2 through a main rod 8. The end of the fixing ring 2 away from the connecting shaft 1 is fixedly connected to a mounting ring 3.

[0036] There is a gap between the inner wall of the fixing ring 2 and the side wall of the fixing column 4, and there is a gap between the side wall of the connecting block 6 and the inner wall of the slot 5. Since the connecting block 6 is rotatably connected to the inner wall of the slot 5 through the auxiliary rod 7, and the connecting block 6 is rotatably connected to the fixing ring 2 through the main rod 8, when one of the mounting rings 3 does not rotate, the connecting shaft 1 can drive the other mounting ring 3 to rotate a certain angle, thereby changing the position of the drill bit, and setting the connection between the drill bit and the drilling machine as a flexible connection, thereby avoiding the need to adjust and clamp the position of the workpiece again when drilling holes at an angle in the prior art, which is cumbersome to operate, and after the position of the workpiece changes, it is easy for errors in the drilling position on the workpiece to occur.

[0037] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the lubrication mechanism includes two first annular cavities 9 opened on the inner wall of the fixed ring 2, and the two first annular cavities 9 are respectively arranged near the two ends of the main rod 8, and the inner wall of the first annular cavity 9 is fixedly connected with a plurality of first oil outlet pipes 10 connected with the side wall of the main rod 8, and the inner wall of the fixed column 4 is opened with two second annular cavities 11, and the two second annular cavities 11 are respectively arranged near the two ends of the auxiliary rod 7, and the inner wall of the second annular cavity 11 is fixedly connected with a plurality of second oil outlet pipes 12 connected with the side wall of the auxiliary rod 7.

[0038] like Figure 3 and Figure 7 As shown, the lubrication mechanism also includes an oil storage frame 13 fixedly connected to the inner wall of the fixed ring 2 through multiple connections, and the inner wall of the oil storage frame 13 is sealed and slidably connected with a first plate 14 and a second plate 15 in sequence from bottom to top, and the side wall of the second plate 15 is connected to the side wall of the fixed ring 2 through an oil pump pipe 16, and a manual regulating valve is installed in the oil pump pipe 16. The inner wall of the oil storage frame 13 located between the first plate 14 and the second plate 15 is connected to the inner walls of the two first annular cavities 9 and the inner walls of the two second annular cavities 11 through a one-way oil outlet pipe 17, and the one-way oil outlet pipe 17 is close to the second plate 15. Furthermore, the one-way oil outlet pipe 17 only allows lubricating oil to flow out of the oil storage frame 13, and the oil pump pipe 16 is connected to an external oil pump to replenish lubricating oil into the oil storage frame 13.

[0039] The fixed column 4 is provided with a sliding mechanism for driving the second plate 15 to slide. The sliding mechanism includes a U-shaped plate 18, and the U-shaped plate 18 is fixedly connected to the side wall of the fixed column 4 away from the connecting shaft 1. A first rolling ball 19 is embedded in the side wall of the U-shaped plate 18 away from the fixed column 4, and a second rolling ball 20 is embedded in the side wall of the second plate 15 close to the U-shaped plate 18. A connecting rod 21 is fixedly connected between the first rolling ball 19 and the second rolling ball 20.

[0040] When the connecting shaft 1 needs to rotate, at this time, the fixed column 4 can rotate along the axis of the main rod 8 or along the axis of the auxiliary rod 7. At this time, since the first rolling ball 19 can rotate in multiple directions on the side wall of the U-shaped plate 18, and the second rolling ball 20 can rotate in multiple directions on the side wall of the second plate 15, then when the fixed column 4 rotates to an inclined state, at this time, the U-shaped plate 18 drives the second plate 15 to slide towards the direction close to the fixed column 4 through the first rolling ball 19, the connecting rod 21 and the second rolling ball 20;

[0041] When the fixed column 4 rotates to a vertical state, at this time, the U-shaped plate 18 drives the second plate 15 to slide away from the fixed column 4 through the first rolling ball 19, the connecting rod 21 and the second rolling ball 20, and squeezes the second plate 15. At this time, the lubricating oil in the oil storage frame 13 will enter the two first annular cavities 9 and the two second annular cavities 11 respectively through the one-way oil outlet pipe 17. Subsequently, the lubricating oil will flow out through the multiple first oil outlet pipes 10 and the multiple second oil outlet pipes 12 to lubricate the connection between the side wall of the main rod 8 and the side wall of the fixed ring 2, and lubricate the connection between the side wall of the auxiliary rod 7 and the side wall of the fixed column 4, so as to avoid that after the fixed column 4 rotates for a long time, at this time, the friction between the side wall of the main rod 8 and the side wall of the fixed ring 2 is relatively large, and the friction between the side wall of the auxiliary rod 7 and the side wall of the fixed column 4 is relatively large, which hinders the normal rotation of the fixed column 4 and thus affects the normal operation of this flexible connection mechanism.

[0042] The oil storage frame 13 is provided with a limiting mechanism for limiting the position of the first plate 14. The limiting mechanism includes a fixing plate 25 fixedly connected to the inner wall of the oil storage frame 13. A threaded cylinder 26 is rotatably connected to the side wall of the fixing plate 25. A rifled rod 27 is threadedly connected to the inner wall of the threaded cylinder 26. A chute 22 is opened on the inner wall of the oil storage frame 13 close to the mounting ring 3. A slider 23 is slidably connected to the inner wall of the chute 22. The side wall of the slider 23 is elastically connected to the inner wall of the chute 22 through a plurality of first springs 24. The side wall of the slider 23 away from the first spring 24 is fixedly connected to a toothed plate 29 through a bolt 33. One end of the rifled rod 27 away from the chute 22 is fixedly connected to the side wall of the first plate 14. A gear 28 is fixedly connected to the side wall of the threaded cylinder 26 away from the first plate 14. The side wall of the gear 28 is meshed with the side wall of the toothed plate 29.

[0043] As Figure 7As shown, since a manual regulating valve is installed in the oil pump pipe 16, when the oil pump pipe 16 is closed, the lubricating oil in the first plate 14 and the second plate 15 cannot flow out during the upward movement of the second plate 15. At this time, the upward movement of the second plate 15 will drive the first plate 14 to move upward, drive the rifle rod 27 to move upward, and then the threaded cylinder 26 drives the gear 28 to rotate counterclockwise, and the gear 28 drives the slider 23 to slide through the tooth plate 29, thereby squeezing multiple first springs 24.

[0044] The side wall of the toothed plate 29 away from the gear 28 is fixedly connected with a plurality of first wedge plates 30, and the inner wall of the slide groove 22 is rotatably connected with a plurality of second wedge plates 31 (combined with Figure 8 - Fig.11 ), the side wall of the second wedge plate 31 is elastically connected to the inner wall of the slide groove 22 through multiple second springs 32, and the horizontal side wall of the first wedge plate 30 is in contact with the horizontal side wall of the second wedge plate 31.

[0045] like Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, the side wall of the second wedge plate 31 close to the rotating shaft is in contact with the inner wall of the slide groove 22, so that the second wedge plate 31 can only rotate in one direction. When the tooth plate 29 drives the slider 23 to slide and squeeze the multiple first springs 24, the multiple first wedge plates 30 squeeze the multiple second wedge plates 31 during the movement, so that the second wedge plates 31 rotate. When the tooth plate 29 no longer moves, the multiple first springs 24 have a tendency to release elastic potential energy. However, since the horizontal side wall of the first wedge plate 30 is in contact with the horizontal side wall of the second wedge plate 31, and the second wedge plate 31 can only rotate in one direction, the position of the tooth plate 29 remains stable at this time.

[0046] In general, during use of the device, the oil pump pipe 16 is always in a closed state, so that whenever the second plate 15 rises, under the cooperation of atmospheric pressure and the one-way oil outlet pipe 17, the first plate 14 rises together with the second plate 15; and when the second plate 15 descends, the limiting mechanism prevents the first plate 14 from descending; this makes the space between the first plate 14 and the second plate 15 shrink as the lubricating oil decreases, so that each time the second plate 15 descends, the oil can be successfully pumped for lubrication. The advantage of such a design is that there is no need to set up an oil storage tank in the flexible connection mechanism to pump oil into the oil storage frame 13, thereby reducing its footprint. In the subsequent process, only lubricating oil needs to be added to the oil storage frame 13, and the lubrication effect on the main rod 8 and the auxiliary rod 7 is also guaranteed during the rotation of the fixed column 4.

[0047] A through groove 34 communicating with the side wall of the oil storage frame 13 is provided at the bottom of the slide groove 22, and a circular groove 35 cooperating with the inner wall of the fixing ring 2 is provided on the side wall of the mounting ring 3, so as to facilitate the disassembly of the bolts 33 connecting the tooth plate 29 and the slider 23, so that the tooth plate 29 is taken out of the slide groove 22. At this time, the plurality of first wedge plates 30 are separated from the plurality of second wedge plates 31, and then the elastic potential energy of the plurality of first springs 24 is released, and the position of the first plate 14 is no longer fixed. At this time, the manual regulating valve can be opened to open the pump oil pipe 16, and then the lubricating oil in the oil storage frame 13 can be replenished. The inner wall of the circular groove 35 is fixedly connected with a circular ring 36, and the side wall of the circular ring 36 is fixedly connected with a cover plate 37 (combined with a plurality of screws) Figure 1 and Figure 8 ).

[0048] The side wall of the fixing ring 2 away from the mounting ring 3 is fixedly connected with a protective ring 38, the inner wall of the protective ring 38 is provided with a plurality of arc grooves 39, the inner wall of the arc groove 39 is slidably connected with an arc plate 40, the side wall of the arc plate 40 away from the arc groove 39 is in contact with the side wall of the fixing column 4, the side wall of the arc plate 40 away from the fixing column 4 is fixedly connected with the inner wall of the arc groove 39 through an elastic bag 41, and the elastic bag 41 is provided with a non-Newtonian liquid.

[0049] A non-Newtonian fluid is a fluid that does not satisfy the linear relationship between shear stress and shear strain rate. When a non-Newtonian fluid is suddenly subjected to a large force, it will harden and produce a large resistance. When a non-Newtonian fluid is subjected to a moderate force, it will not produce a large resistance. Then, when the fixed column 4 rotates slowly, the arc plate 40 will squeeze the elastic bag 41. At this time, the non-Newtonian fluid in the elastic bag 41 will not hinder the rotation of the fixed column 4. When the fixed column 4 rotates rapidly, the non-Newtonian fluid in the elastic bag 41 is subjected to a large impact. Then, the non-Newtonian fluid will harden and produce a large resistance to the fixed column 4, thereby hindering its rotation, thereby avoiding the collision of the fixed column 4 with the side wall of the fixed ring 2 during rapid rotation during use, and protecting the flexible connection structure.

[0050] When the flexible connection structure is in use, one of the mounting rings 3 is mounted on the drilling machine, and the other mounting ring 3 is mounted on the drill bit device. During the use of the drill bit, since the connecting block 6 is rotatably connected to the inner wall of the slot 5 through the auxiliary rod 7, the connecting block 6 is rotatably connected to the fixing ring 2 through the main rod 8, so that when one of the mounting rings 3 does not rotate, the connecting shaft 1 can drive the other mounting ring 3 to rotate a certain angle, thereby changing the position of the drill bit. The connection between the drill bit and the drilling machine is set as a flexible connection, thereby avoiding the need to adjust and clamp the position of the workpiece again when drilling holes on the workpiece in an inclined manner in the prior art, which is cumbersome to operate, and after the position of the workpiece is changed, it is easy to cause errors in the drilling position on the workpiece.

[0051] When the connecting shaft 1 needs to rotate, the fixed column 4 can rotate along the axis of the main rod 8 or along the axis of the auxiliary rod 7. At this time, since the first rolling ball 19 can rotate in multiple directions on the side wall of the U-shaped plate 18, and the second rolling ball 20 can rotate in multiple directions on the side wall of the second plate 15, when the fixed column 4 rotates to a tilted state, the U-shaped plate 18 drives the second plate 15 to slide in a direction close to the fixed column 4 through the first rolling ball 19, the connecting rod 21 and the second rolling ball 20;

[0052] Since a manual regulating valve is installed in the oil pump pipe 16, when the oil pump pipe 16 is closed, the lubricating oil in the first plate 14 and the second plate 15 cannot flow out during the upward movement of the second plate 15. At this time, the upward movement of the second plate 15 will drive the first plate 14 to move upward, drive the rifle rod 27 to move upward, and then the threaded cylinder 26 drives the gear 28 to rotate counterclockwise (such as Figure 7 As shown in the figure, the gear 28 drives the slider 23 to slide through the toothed plate 29, and presses the plurality of first springs 24. At this time, the toothed plate 29 drives the plurality of first wedge plates 30 to press the plurality of second wedge plates 31 during the movement, so that the second wedge plates 31 rotate;

[0053] When the toothed plate 29 stops moving, the plurality of first springs 24 tend to release elastic potential energy, but the horizontal side wall of the first wedge plate 30 fits the horizontal side wall of the second wedge plate 31, and the second wedge plate 31 can only rotate in one direction, and the position of the toothed plate 29 remains stable.

[0054] When the fixed column 4 rotates to a vertical state, the U-shaped plate 18 drives the second plate 15 to slide in a direction away from the fixed column 4 through the first rolling ball 19, the connecting rod 21 and the second rolling ball 20, and squeezes the second plate 15. Since the position of the toothed plate 29 remains stable at this time, the position of the first plate 14 cannot change. In the process of the second plate 15 moving downward, the lubricating oil in the first plate 14 and the second plate 15 will be squeezed out, and the lubricating oil in the oil storage frame 13 will enter the two first annular cavities 9 and the two second annular cavities 11 respectively through the one-way oil outlet pipe 17, and then the lubricating oil will flow out through the multiple first oil outlet pipes 10 and the multiple second oil outlet pipes 12 to lubricate the connection between the side wall of the main rod 8 and the side wall of the fixed ring 2, and lubricate the connection between the side wall of the auxiliary rod 7 and the side wall of the fixed column 4. In the subsequent process of returning to the original position after the fixed column 4 rotates, the main rod 8 and the auxiliary rod 7 will be pumped with oil for lubrication;

[0055] When it is necessary to replenish the lubricating oil between the first plate 14 and the second plate 15, the cover plate 37 is removed by disassembling the multiple screws, and then the bolts 33 connecting the tooth plate 29 and the slider 23 can be disassembled through the through slot 34, so that the tooth plate 29 is taken out from the slide slot 22. At this time, the multiple first wedge plates 30 are separated from the multiple second wedge plates 31, and then the elastic potential energy of the multiple first springs 24 is released, and the position of the first plate 14 is no longer fixed. At this time, the manual regulating valve can be opened to open the oil pump pipe 16, and then the lubricating oil in the oil storage frame 13 can be replenished through the oil pump pipe 16;

[0056] And when the fixed column 4 rotates slowly, the arc plate 40 will squeeze the elastic bag 41, and the non-Newtonian liquid in the elastic bag 41 will not hinder the rotation of the fixed column 4. When the fixed column 4 rotates quickly, the non-Newtonian liquid in the elastic bag 41 will be hit harder, and the non-Newtonian liquid will harden and produce greater resistance to the fixed column 4, thereby hindering its rotation, avoiding the collision of the fixed column 4 with the side wall of the fixed ring 2 during rapid rotation during use, and protecting the flexible connection structure.

[0057] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flexible connection structure, characterized in that, it includes: a connecting shaft (1); Two flexible mechanisms, the two flexible mechanisms are respectively arranged at both ends of the connecting shaft (1). The flexible mechanism includes a fixed ring (2) and a fixed column (4). The fixed column (4) is fixedly connected to one end of the connecting shaft (1). A clamping groove (5) is formed on the side wall of the fixed column (4) away from the connecting shaft (1). A connecting block (6) is rotatably connected to the inner wall of the clamping groove (5) through a secondary rod (7). The side wall of the connecting block (6) is rotatably connected to the inner wall of the fixed ring (2) through a main rod (8). An installation ring (3) is fixedly connected to one end of the fixed ring (2) away from the connecting shaft (1); a lubricating mechanism, the lubricating mechanism includes two first annular cavities (9) formed on the inner wall of the fixed ring (2). The two first annular cavities (9) are respectively arranged close to both ends of the main rod (8). A plurality of first oil outlet pipes (10) communicating with the side wall of the main rod (8) are fixedly connected to the inner wall of the first annular cavity (9). Two second annular cavities (11) are formed on the inner wall of the fixed column (4). The two second annular cavities (11) are respectively arranged close to both ends of the secondary rod (7). A plurality of second oil outlet pipes (12) communicating with the side wall of the secondary rod (7) are fixedly connected to the inner wall of the second annular cavity (11); The lubricating mechanism further includes an oil storage frame (13) fixedly connected to the inner wall of the fixed ring (2) through a plurality of. A first plate (14) and a second plate (15) are hermetically and slidably connected to the inner wall of the oil storage frame (13) in sequence from bottom to top. The side wall of the second plate (15) is communicated with the side wall of the fixed ring (2) through a pump oil pipe (16). A manual regulating valve is installed in the pump oil pipe (16). The inner wall of the oil storage frame (13) between the first plate (14) and the second plate (15) is communicated with the inner walls of the two first annular cavities (9) and the inner walls of the two second annular cavities (11) respectively through a one-way oil outlet pipe (17), and the one-way oil outlet pipe (17) is close to the second plate (15); a sliding mechanism for driving the second plate (15) to slide is arranged on the fixed column (4). The sliding mechanism includes a U-shaped plate (18). The U-shaped plate (18) is fixedly connected to the side wall of the fixed column (4) away from the connecting shaft (1). A first rolling ball (19) is embedded in the side wall of the U-shaped plate (18) away from the fixed column (4). A second rolling ball (20) is embedded in the side wall of the second plate (15) close to the U-shaped plate (18). A connecting rod (21) is fixedly connected between the first rolling ball (19) and the second rolling ball (20); A limiting mechanism for limiting the position of the first plate (14) is provided in the oil storage frame (13), the limiting mechanism comprising a fixing plate (25) fixedly connected to the inner wall of the oil storage frame (13), a threaded cylinder (26) being rotatably connected to the side wall of the fixing plate (25), a rifle rod (27) being threadedly connected to the inner wall of the threaded cylinder (26), a sliding groove (22) being provided on the inner wall of the oil storage frame (13) near the mounting ring (3), a sliding block (23) being slidably connected to the inner wall of the sliding groove (22), The side wall of the slider (23) is elastically connected to the inner wall of the slide groove (22) via a plurality of first springs (24); the side wall of the slider (23) away from the first spring (24) is fixedly connected to a toothed plate (29) via a bolt (33); one end of the rifle rod (27) away from the slide groove (22) is fixedly connected to the side wall of the first plate (14); the side wall of the threaded tube (26) away from the first plate (14) is fixedly connected to a gear (28); and the side wall of the gear (28) is meshed with the side wall of the toothed plate (29).

2. A flexible connection structure according to claim 1, It is characterized in that A plurality of first wedge plates (30) are fixedly connected to the side wall of the toothed plate (29) away from the gear (28); a plurality of second wedge plates (31) are rotatably connected to the inner wall of the slide groove (22) via a rotating shaft; the side walls of the second wedge plates (31) are elastically connected to the inner wall of the slide groove (22) via a plurality of second springs (32); and the side walls of the first wedge plates (30) in a horizontal plane are in contact with the side walls of the second wedge plates (31) in a horizontal plane.

3. A flexible connection structure according to claim 2, It is characterized in that A through groove (34) communicating with the side wall of the oil storage frame (13) is formed at the bottom of the slide groove (22); a circular groove (35) cooperating with the inner wall of the fixing ring (2) is formed on the side wall of the mounting ring (3); a circular ring (36) is fixedly connected to the inner wall of the circular groove (35); and a cover plate (37) is fixedly connected to the side wall of the circular ring (36) via a plurality of screws.

4. A flexible connection structure according to claim 3, It is characterized in that A protective ring (38) is fixedly connected to the side wall of the fixing ring (2) away from the mounting ring (3); a plurality of arcuate grooves (39) are formed on the inner side wall of the protective ring (38); an arcuate plate (40) is slidably connected to the inner wall of the arcuate groove (39); a side wall of the arcuate plate (40) away from the arcuate groove (39) is in contact with the side wall of the fixing column (4); a side wall of the arcuate plate (40) away from the fixing column (4) is fixedly connected to the inner wall of the arcuate groove (39) via an elastic bag (41); a non-Newtonian liquid is provided in the elastic bag (41).

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