A folding wing rope-driven ball inverse helical folding and unfolding device

Abstract

The application provides a folding wing rope drive ball reverse helix folding and unfolding device, which comprises a folding and unfolding mechanism, a rope drive mechanism and a pulley steering mechanism; the rope drive mechanism supports the folding and unfolding mechanism and the pulley steering mechanism, the rope drive mechanism keeps the steel wire rope in a tension state by adjusting the distance, the pulley steering mechanism is used for changing the direction of the steel wire rope, the rope drive mechanism outputs rotary motion, the direction of the steel wire rope is changed, reciprocating tension action is realized, the folding and unfolding mechanism is pulled to drive the folding wing and the fixed wing to rotate around the axis. The rope drive mechanism and the pulley steering mechanism are used to realize the loosening and tension action of the connecting end of the steel wire rope, the sliding and rolling contact of the ball in the linear groove, the helical groove and the linear / helical composite groove structure is used to realize the rotary motion of the folding wing under a large lead, and the large-scale high-efficiency driving, the large-angle high-torque density folding and unfolding effect under the compact height wing space are achieved.

Description

Technical Field

[0001] This invention relates to a spiral folding mechanism, and more particularly to a folding wing rope-driven ball reverse spiral folding device, belonging to the field of machinery. Background Technology

[0002] Folding and unfolding is an important functional requirement. The simplest way to achieve folding and unfolding is to use a reducer to directly convert the rotation of the motor into the rotation of the end. The reduction ratio can achieve the effect of increasing torque and reducing speed. However, the radial dimensions of various reducers are relatively large, especially in situations where the space of the rotating shaft is limited, this type of transmission is more difficult to adapt to.

[0003] Helical drives can be used in reverse, converting linear motion into rotation, and the application of ball bearings can achieve an efficiency of over 90%. Rope drive mechanisms are suitable for large-scale driving, remote driving, and layout in irregular spaces. Therefore, how to combine the above functional mechanisms to achieve large-load folding and unfolding movements in flat wing-shaped spaces is an urgent problem to be solved. Summary of the Invention

[0004] The technical problem to be solved by this invention is: in order to achieve large load folding and unfolding action in a flat airfoil space, this invention proposes a folding wing rope-driven ball reverse spiral folding and unfolding device to achieve large-scale, high-efficiency drive and large-angle, high-torque-density folding and unfolding effect in a compact airfoil space.

[0005] The technical solution adopted in this invention is: a folding wing rope-driven ball bearing reverse spiral folding and unfolding device, comprising: a folding and unfolding mechanism, a rope driving mechanism, and a pulley steering mechanism; the rope driving mechanism supports the folding and unfolding mechanism and the pulley steering mechanism, and the rope driving mechanism adjusts the distance to keep the steel wire rope in the pulley steering mechanism taut, the pulley steering mechanism is used to change the direction of the steel wire rope, and the rotational action output by the rope driving mechanism is transformed into the reciprocating tensioning action of the steel wire rope on the folding and unfolding mechanism after the pulley steering mechanism changes the direction of the steel wire rope, thereby pulling the folding and unfolding mechanism to drive the folding wing and the fixed wing to rotate on a fixed axis.

[0006] Furthermore, the folding mechanism includes: a spiral groove nut, a composite screw, a straight groove nut, a locking ring, a thrust bearing seat, a fixing bolt, straight balls, spiral segment balls, and thrust balls; the spiral groove nut is fixedly installed on the folding wing; two straight groove nuts are fixedly installed on the fixing wing and are coaxially and symmetrically arranged on both sides of the spiral groove nut; the composite screw passes through the internal cavities of the spiral groove nut and the straight groove nut, and several spiral segment balls are installed in the arc groove structure between the composite screw and the spiral groove nut, and several straight balls are installed in the arc groove structure between the composite screw and the straight groove nut to achieve rolling contact; the two straight groove nuts are connected by a fixing bolt and clamp the spiral groove nut; a thrust bearing seat is coaxially installed between the spiral groove nut and the straight groove nut, and the thrust balls are evenly arranged circumferentially in the thrust bearing seat and circulate.

[0007] Furthermore, a spiral groove is integrally machined on the outer wall of the composite screw, and the spiral grooves are evenly distributed in a circumferential direction with a quantity of N. Straight grooves are evenly machined in a circumferential direction at both ends of the spiral grooves, and the straight grooves are evenly distributed in a circumferential direction with a quantity of N. This results in a spiral groove segment being formed in the middle part of the composite screw, and straight / spiral composite groove segments being formed on both sides of the spiral groove segment.

[0008] Furthermore, the lead of the spiral groove integrally machined on the outer wall of the composite screw is P. When the spiral groove nut rotates 90°, the total length of the spiral groove is P / 2+X+2Y, and the total length of the straight grooves machined at both ends is P / 2+2Y. X is the spiral groove length of the spiral groove nut, and Y is the straight groove length of the straight groove nut.

[0009] Furthermore, the spiral groove nut includes a folding wing connecting rod and a composite screw mounting ring. The folding wing connecting rod is used to connect with the folding wing. The inner wall of the composite screw mounting ring is provided with a spiral groove, and the two ends of the inner hole are retaining ring structures. The length of the spiral groove is X, and the number of spiral grooves evenly distributed around the circumference is N. The lead, helix angle, and profile of the spiral groove of the spiral groove nut are the same as those of the spiral groove portion of the composite screw, and the profile is equal to the diameter of the spiral segment ball. Under the semi-arc constraint of the spiral groove of the spiral groove nut, the spiral segment ball rolls and slides in the spiral groove portion of the composite screw, and does not enter the straight groove portion.

[0010] Furthermore, the linear groove nut includes a fixed wing connecting frame and a composite screw mounting ring. The inner wall of the composite screw mounting ring is provided with a linear groove, and a locking ring is installed at one end of the inner hole. The length of the linear groove is Y, and the number of linear grooves evenly distributed around the circumference is N. The lead, helix angle, and profile of the linear groove are the same as those of the linear groove portion of the composite screw, and the profile is equal to the diameter of the linear ball. Under the semi-arc constraint of the linear groove of the linear groove nut, the linear ball rolls and slides in the linear groove portion of the composite screw, and does not enter the helical groove portion.

[0011] Furthermore, the rope drive mechanism includes: a servo motor, a spiral drum, a rope drive housing, a mounting plate, and a rope drive bracket; the shaft of the servo motor is installed in the hole of the spiral drum, the spiral drum is installed in the rope drive housing, the flange structure of the servo motor is installed on one side of the rope drive housing, the flange structure of the rope drive housing is installed on the mounting plate, and the flange structure of the mounting plate is connected to one end of the rope drive bracket; the rope drive bracket is placed in the cavity of the fixed wing.

[0012] Furthermore, the pulley steering mechanism includes: a wire rope, a pulley bracket, a pulley, and a pulley shaft; the pulley is mounted at both ends of the pulley bracket via the pulley shaft, and the pulley rotates relative to the pulley bracket; the pulley bracket is fixed to one end of the rope drive bracket; both ends of the composite screw are connected to the wire rope, and after the wire rope passes over the pulley, it is wound and fixed on the spiral drum. When the spiral drum is driven to rotate forward and backward by a servo motor, it loosens or tightens the wire rope; two straight groove nuts are installed in the middle of the pulley bracket; the reciprocating tensioning action of the wire rope causes the composite screw to slide or roll relative to the spiral groove nuts and the straight groove nuts, causing the spiral groove nuts to rotate.

[0013] Furthermore, the side of the rope drive housing is provided with a notch for accommodating a steel wire rope.

[0014] Furthermore, the surface of the spiral drum is provided with a spiral groove with a semi-circular cross-section for use with the wire rope.

[0015] The advantages of this invention compared to the prior art are:

[0016] (1) The present invention proposes a folding wing rope-driven ball reverse spiral folding device, which adopts the ball reverse spiral as the core working principle. The three types of balls can greatly reduce the friction force, thereby reducing the power requirement of the drive device. The ball reverse spiral converts linear motion into rotational motion, which can significantly reduce its height dimension and adapt to the flat height space of the wing surface. The straight / spiral composite section groove design is adopted, and the two types of steel balls are independent and do not interfere with each other, thus reducing the axial dimension of the mechanism.

[0017] (2) The present invention uses a rope drive mechanism and a pulley steering mechanism to further reduce the space requirements of the wing surface height and adapt to more flexible remote drive; the steel wire rope is used as the force transmission medium, and its flexible physical characteristics can be adapted to the wing surface vibration dynamic environment. Attached Figure Description

[0018] Figure 1 This is a component diagram of the folding wing rope-driven ball reverse spiral unfolding device provided in an embodiment of the present invention;

[0019] Figure 2 This is a partial cross-sectional view of the folding wing rope-driven ball reverse spiral unfolding device provided in an embodiment of the present invention;

[0020] Figure 3 This is a diagram showing different ball arrangements of the folding wing rope-driven ball reverse spiral unfolding device provided in this embodiment of the invention;

[0021] Figure 4 This is a structural diagram of the composite screw of the folding wing rope-driven ball reverse spiral unfolding device provided in an embodiment of the present invention. Detailed Implementation

[0022] The present invention will be described in conjunction with the accompanying drawings.

[0023] like Figure 1 As shown, a folding wing rope-driven ball bearing reverse spiral folding device includes: a folding mechanism, a rope drive mechanism, and a pulley steering mechanism.

[0024] The folding mechanism includes: a spiral groove nut 2a, a composite lead screw 2b, a straight groove nut 2c, a locking ring 2d, a thrust bearing seat 2e, a fixing bolt 2f, a straight ball bearing 2g, a spiral segment ball bearing 2h, and a thrust ball bearing 2i. The rope drive mechanism includes: a servo motor 3a, a spiral drum 3b, a rope drive housing 3c, a mounting plate 3d, and a rope drive bracket 3e. The pulley steering mechanism includes: a wire rope 4a, a pulley bracket 4b, a pulley 4c, a pulley shaft 4d, and a screw assembly 4e.

[0025] The spiral groove nut 2a of the folding mechanism is fixed to the folding wing 1b, and the two straight groove nuts 2c are fixed to the fixed wing 1a. They are arranged coaxially and symmetrically on both sides of the spiral groove nut 2a. The folding mechanism drives the folding wing 1b and the fixed wing 1a to rotate on a fixed axis respectively.

[0026] The composite screw 2b passes through the internal cavity of the spiral groove nut 2a and the straight groove nut 2c. A certain number of straight balls 2g and spiral balls 2h are installed on the arc groove structure of the three surfaces to achieve rolling contact.

[0027] The two ends of the composite screw 2b are connected to the steel wire rope 4a. The rope drive mechanism causes the ball to slide or roll in the arc groove structure through reciprocating tensioning action, which forces the spiral groove nut 2a to rotate.

[0028] The rope drive mechanism, folding mechanism, and pulley steering mechanism are all fixed to the rope drive bracket 3e. By adjusting the center distance, the wire rope 4a is kept taut. The output rotational motion of the rope drive mechanism is changed by the steering of the wire rope 4a into the reciprocating tensioning motion of the wire rope 4a, thereby completing the rotation of the folding wing 1b.

[0029] like Figure 3 , Figure 4As shown, a spiral groove is integrally machined on the outer wall of the composite screw 2b. The spiral grooves are evenly distributed circumferentially, with a quantity of N. Straight grooves are evenly machined circumferentially at both ends of the spiral groove, with a quantity of N. This results in a spiral groove segment in the middle of the composite screw 2b, with straight / spiral composite groove segments formed on both sides of the spiral groove segment. The spiral grooves are formed entirely using the same machining method. The lead is assumed to be P. When the spiral groove nut 2a rotates 90°, the total length of the spiral groove is P / 2 + X + 2Y, and the total length of the straight grooves at both ends is P / 2 + 2Y; N is a positive integer.

[0030] The inner cavity of the spiral groove nut 2a is provided with a spiral groove, and the two ends are annular retaining ring structures. The length of the groove is assumed to be X, and the number of grooves is N evenly distributed around the circumference. The parameters such as the lead, helix angle, and profile of the groove are the same as those of the spiral part of the composite screw 2b, and the profile is equal to the diameter of the spiral segment ball 2h. Under the semi-circular constraint of the spiral groove of the spiral groove nut 2a, the spiral segment ball 2h can roll and slide in the spiral part of the composite screw 2b without entering the straight groove part.

[0031] The inner cavity of the linear groove nut 2c is provided with a linear groove, and a locking ring 2d is installed on one end. The length of the groove is assumed to be Y, and the number of grooves is evenly distributed around the circumference N. The parameters such as the lead, helix angle, and profile of the groove are the same as those of the linear part of the composite screw 2b, and the profile is equal to the diameter of the linear ball 2g. Under the semi-circular constraint of the linear groove of the linear groove nut 2c, the linear ball 2g can roll and slide on the linear part of the composite screw 2b without entering the spiral groove part.

[0032] like Figure 2 As shown, two straight groove nuts 2c are connected by a fixing bolt 2f, which clamps the spiral groove nut 2a. Between the spiral groove nut 2a and the straight groove nut 2c, a thrust bearing seat 2e is coaxially installed. The thrust bearing seat 2e has a groove with a semi-circular cross section for the movement of the thrust balls 2i. The thrust balls 2i are evenly arranged in the circumference and roll in a cycle, which can reduce the rotational friction between the spiral groove nut 2a and the straight groove nut 2c.

[0033] The folding wing 1b has two pin structures, and the fixed wing 1a has two pin hole structures. After the pins and pin holes are installed and matched, they can rotate relative to the axis. The folding wing 1b has a square groove and a screw hole, which correspond to the square platform and screw hole of the spiral groove nut 2a. It is fixed by several screw assemblies 4e. The fixed wing 1a has a hollow structure inside. The rope drive bracket 3e is placed in the cavity and fixed by several screw assemblies 4e.

[0034] The pulley bracket 4b has a notch structure with a pulley 4c installed on it, and the pulley shaft 4d passes through it, so that the pulley 4c can rotate relative to the pulley bracket 4b; the square flange part of the pulley bracket 4b has several screw holes, which can be fixed to one side of the rope drive bracket 3e by the screw assembly 4e.

[0035] The wire rope 4a is embedded in the groove of the pulley 4c and contacts it to reduce the friction of the wire rope and realize the steering function; the end of the wire rope 4a is provided with a threaded joint, which is connected to the threaded holes at both ends of the composite screw 2b. The loosening and tightening action of the wire rope can drive the composite screw 2b to move back and forth.

[0036] The shaft of the servo motor 3a is connected to the hole of the spiral drum 3b. The flange structure of the servo motor 3a is connected to one side of the rope drive housing 3c through several screw assemblies 4e. The flange structure of the rope drive housing 3c is connected to the mounting plate 3d through several screw assemblies 4e. The flange structure of the mounting plate 3d is connected to the rope drive bracket 3e through several screw assemblies 4e.

[0037] The surface of the spiral drum 3b is provided with a spiral groove with a semi-circular cross-section. After the wire rope 4a is wound a certain number of turns, its end is fixed to the spiral drum 3b. When the spiral drum 3b is driven to rotate forward and backward by the servo motor 3a, it can loosen and tighten the wire rope 4a. The side of the rope drive housing 3c is provided with a notch to accommodate the wrap angle of the wire rope 4a.

[0038] Working principle:

[0039] The spiral groove nut 2a of the folding mechanism is fixed to the folding wing 1b, and the two straight groove nuts 2c are fixed to the fixed wing 1a. They are arranged coaxially and symmetrically on both sides of the spiral groove nut 2a. The folding mechanism drives the folding wing 1b and the fixed wing 1a to rotate on a fixed axis respectively.

[0040] The composite screw 2b passes through the internal cavity of the spiral groove nut 2a and the straight groove nut 2c. A certain number of straight balls 2g and spiral balls 2h are installed on the arc groove structure of the three surfaces to achieve rolling contact.

[0041] The two ends of the composite screw 2b are connected to the steel wire rope 4a. The rope drive mechanism causes the ball to slide or roll in the arc groove structure through reciprocating tensioning action, which forces the spiral groove nut 2a to rotate.

[0042] The rope drive mechanism, folding mechanism, and pulley steering mechanism are all fixed to the rope drive bracket 3e. The steel wire rope 4a is kept taut by adjusting the center distance. The rotational motion output by the rope drive mechanism is changed by the steering of the steel wire rope 4a to achieve reciprocating tensioning action, thereby completing the rotation of the folding wing 1b.

[0043] The parts of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A folding wing rope-driven ball bearing reverse spiral folding and unfolding device, characterized in that, include: Folding mechanism, rope drive mechanism, pulley steering mechanism; the rope drive mechanism supports the folding mechanism and the pulley steering mechanism. The rope drive mechanism adjusts the distance to keep the wire rope (4a) in the pulley steering mechanism taut. The pulley steering mechanism is used to change the direction of the wire rope (4a). The rotational action output by the rope drive mechanism is transformed into the reciprocating tensioning action of the wire rope (4a) on the folding mechanism after the pulley steering mechanism changes the direction of the wire rope (4a). This pulls the folding mechanism to drive the folding wing (1b) and the fixed wing (1a) to rotate on a fixed axis. The folding mechanism includes: a spiral groove nut (2a), a composite screw (2b), a straight groove nut (2c), a locking ring (2d), a thrust bearing seat (2e), a fixing bolt (2f), a straight ball bearing (2g), a spiral segment ball bearing (2h), and a thrust ball bearing (2i); the spiral groove nut (2a) is fixedly mounted to the folding wing (1b); the two straight groove nuts (2c) are fixedly mounted to the fixing wing (1a) and are coaxially and symmetrically arranged on both sides of the spiral groove nut (2a); the composite screw (2b) passes through the internal cavities of the spiral groove nut (2a) and the straight groove nut (2c). Several helical ball bearings (2h) are installed in the arc groove structure between the composite screw (2b) and the helical groove nut (2a), and several linear ball bearings (2g) are installed in the arc groove structure between the composite screw (2b) and the linear groove nut (2c) to achieve rolling contact; the two linear groove nuts (2c) are connected by fixing bolts (2f) and clamp the helical groove nut (2a); between the helical groove nut (2a) and the linear groove nut (2c), a thrust bearing seat (2e) is installed coaxially, and the thrust ball bearings (2i) are evenly arranged in the circumference of the thrust bearing seat (2e) and roll in a cycle.

2. The folding wing rope-driven ball bearing reverse spiral folding device according to claim 1, characterized in that, The outer wall of the composite screw (2b) is integrally machined with a spiral groove. The spiral grooves are evenly distributed around the circumference and the number of spiral grooves is N. Straight grooves are evenly machined around the circumference at both ends of the spiral grooves. The number of straight grooves is N. This makes the middle part of the composite screw (2b) form a spiral groove segment, and straight / spiral composite groove segments are formed on both sides of the spiral groove segment. N is a positive integer.

3. The folding wing rope-driven ball bearing reverse spiral folding device according to claim 2, characterized in that, The lead of the spiral groove integrally machined on the outer wall of the composite screw (2b) is P. When the spiral groove nut (2a) rotates 90°, the total length of the spiral groove is P / 2+X+2Y, and the total length of the straight grooves machined at both ends is P / 2+2Y. X is the length of the spiral groove of the spiral groove nut (2a), and Y is the length of the straight groove of the straight groove nut (2c).

4. The folding wing rope-driven ball bearing reverse spiral folding device according to claim 1, characterized in that, The spiral groove nut (2a) includes a folding wing connecting rod and a composite screw mounting ring. The folding wing connecting rod is used to connect with the folding wing (1b). The inner wall of the composite screw mounting ring is provided with a spiral groove. The two ends of the inner hole are retaining ring structures. The length of the spiral groove is X. The number of spiral grooves evenly distributed around the circumference is N. The lead, helix angle and profile of the spiral groove of the spiral groove nut (2a) are the same as those of the spiral groove part of the composite screw (2b), and the profile is equal to the diameter of the spiral segment ball (2h). Under the semi-arc constraint of the spiral groove of the spiral groove nut (2a), the spiral segment ball (2h) rolls and slides in the spiral groove part of the composite screw (2b) and does not enter the straight groove part.

5. A folding wing rope-driven ball bearing reverse spiral folding and unfolding device according to claim 1, characterized in that, The linear groove nut (2c) includes a fixed wing connecting frame and a composite screw mounting ring. The inner wall of the composite screw mounting ring is provided with a linear groove, and a locking ring (2d) is installed at one end of the inner hole. The length of the linear groove is Y, and the number of linear grooves evenly distributed around the circumference is N. The lead, helix angle, and profile of the linear groove are the same as those of the linear groove portion of the composite screw (2b), and the profile is equal to the diameter of the linear ball (2g). Under the semi-arc constraint of the linear groove of the linear groove nut (2c), the linear ball (2g) rolls and slides in the linear groove portion of the composite screw (2b) and does not enter the spiral groove portion.

6. A folding wing rope-driven ball bearing reverse spiral folding and unfolding device according to claim 1, characterized in that, The rope drive mechanism includes: a servo motor (3a), a spiral drum (3b), a rope drive housing (3c), a mounting plate (3d), and a rope drive bracket (3e); the shaft of the servo motor (3a) is installed in the hole of the spiral drum (3b), the spiral drum (3b) is installed in the rope drive housing (3c), the flange structure of the servo motor (3a) is installed on one side of the rope drive housing (3c), the flange structure of the rope drive housing (3c) is installed on the mounting plate (3d), and the flange structure of the mounting plate (3d) is connected to one end of the rope drive bracket (3e); the rope drive bracket (3e) is placed in the cavity of the fixed wing (1a).

7. A folding wing rope-driven ball bearing reverse spiral folding device according to claim 6, characterized in that, The pulley steering mechanism includes: a wire rope (4a), a pulley bracket (4b), a pulley (4c), and a pulley shaft (4d); the pulley (4c) is mounted on both ends of the pulley bracket (4b) via the pulley shaft (4d), and the pulley (4c) rotates relative to the pulley bracket (4b); the pulley bracket (4b) is fixed to the other end of the rope drive bracket (3e); both ends of the composite screw (2b) are connected to the wire rope (4a), and the wire rope (4a) passes over the pulley (4c) and then... The wire rope (4a) is wound and fixed on the spiral drum (3b). When the spiral drum (3b) is driven to rotate forward and backward by the servo motor (3a), it can loosen or tighten the wire rope (4a). Two straight groove nuts (2c) are installed in the middle of the pulley bracket (4b). The reciprocating tensioning action of the wire rope (4a) causes the composite screw (2b) to slide or roll relative to the spiral groove nut (2a) and the straight groove nut (2c), so that the spiral groove nut (2a) rotates.

8. A folding wing rope-driven ball bearing reverse spiral folding device according to claim 6, characterized in that, The side of the rope drive housing (3c) is provided with a notch for fitting the wire rope (4a).

9. A folding wing rope-driven ball bearing reverse spiral folding and unfolding device according to claim 6, characterized in that, The surface of the spiral drum (3b) is provided with a spiral groove with a semi-circular cross-section for use with the wire rope (4a).

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