High-precision hinge with damping

Abstract

The application discloses a high-precision damping hinge, which can reduce the back difference by applying pre-tightening force, and realizes high positioning precision through a limiting surface, and has the following advantages: high absolute positioning precision, high repeat positioning precision, high rigidity, compact structure, light weight, and the like; the hinge is integrated with a damper, and impact generated when a large load is unfolded is reduced.

Description

Technical Field

[0001] This invention relates to a hinge, and more particularly to a high-precision damped hinge. Background Technology

[0002] Spacecraft widely use hinges to achieve payload folding and on-orbit deployment, such as the on-orbit deployment of solar panels, as shown in CN201920513853.3. In some applications, such as antenna deployment, there are high requirements for pointing accuracy and vibration suppression, which requires hinges with high positioning accuracy and high stiffness. For heavy load conditions, a large deployment force needs to be applied, which can cause impact when the device is fully deployed. Therefore, it is necessary to develop a hinge with high positioning accuracy and integrated damper. Summary of the Invention

[0003] The purpose of this invention is to provide a high-precision damped hinge that also features a compact structure, high positioning accuracy, and high rigidity.

[0004] A high-precision damped hinge, characterized in that it comprises a symmetrical hinge, a hinge shaft A, a gear connecting rod, an adjusting connecting rod B, a set screw sleeve, an adjusting connecting rod A, a clamping screw, a hinge shaft B, a locking connecting rod B, a hinge shaft C, a locking connecting rod A, a hinge shaft D, an unfolding torsion spring, and a locking torsion spring. The symmetrical hinge is a plate-shaped component with screw mounting holes. One end of the plate has a limiting surface, and one side of the plate has multiple sets of lugs with hinge holes and threaded holes. The hinge shafts A, B, C, and D are columnar members; The gear connecting rod is a connecting rod with hinge holes at both ends; The adjusting link B is a link with a columnar body at the center. The columnar body has a threaded hole at the center and hinge holes at both ends. The columnar body and the hinge holes are perpendicular to each other. The set screw sleeve is a cylindrical member with a through threaded hole in the center and a loading plane on the surface for bearing torque. The adjusting link A is a link with a stud in the center, and hinge holes are provided at both ends of the link. The stud and the hinge holes are perpendicular to each other. A through hole is provided in the center of the stud. A countersunk hole concentric with the stud is provided on the upper surface of the adjusting link A. The clamping screw is a screw; Both locking link B and locking link A are links with hinge holes at both ends; The symmetrical hinge, gear connecting rod, and adjusting connecting rod B are hinged together via hinge axis A. The threaded hole of the set screw sleeve is screwed onto the stud of adjusting connecting rod A. The through hole at the center of the stud of adjusting connecting rod A is fitted onto the cylindrical body at the center of adjusting connecting rod B. The clamping screw is placed in the countersunk hole of adjusting connecting rod A and screwed onto the threaded hole at the center of the cylindrical body of adjusting connecting rod B. Adjusting connecting rod A and locking connecting rod B are hinged together via hinge axis B. Locking connecting rod B and locking connecting rod A are hinged together via hinge axis C. Locking connecting rod A and symmetrical hinge are hinged together via hinge axis D. The plane containing the axis of the cylindrical body at the center of adjusting connecting rod B and the midpoint of the gear connecting rod is defined as a mirror plane. Another set of symmetrical hinges, hinge axis B, locking connecting rod B, hinge axis C, locking connecting rod A, and hinge axis D are arranged symmetrically relative to the mirror plane. Set screws and clamping screws are used to apply preload and reduce hysteresis; After the hinge is unfolded, locking link B and locking link A form a dead point lock, and the symmetrical hinge limiting surfaces fit together to limit the movement. Both the deploying torsion spring and the locking torsion spring are torsion springs. The unfolding torsion spring is sleeved on hinge shaft A, and its two ends abut against the symmetrical hinge and the gear connecting rod, respectively. The locking torsion spring is sleeved on hinge shaft B and hinge shaft D. The two ends of the locking torsion spring sleeved on hinge shaft B abut against the adjusting connecting rod A and the locking connecting rod B, respectively. The two ends of the locking torsion spring sleeved on hinge shaft D abut against the locking connecting rod A and the symmetrical hinge, respectively. The unfolding torsion spring and the locking torsion spring are arranged symmetrically in mirror image. It also includes damping gears and rotary dampers; The gear connecting rod has additional tooth surfaces at both ends, and each tooth center has a hinge hole. The damping gear is a gear that can mesh with a gear connecting rod, and the damping gear has a through hole in the center; The rotary damper is an accelerator with an input shaft. The input end has a low rotational speed and the output end has a high rotational speed. It can provide rotary damping at the input end and is equipped with screw mounting holes. The rotary damper is fixed to the symmetrical hinge by screws. The through hole of the damping gear is fitted on the input shaft of the rotary damper. The tooth surface of the damping gear meshes with the tooth surface of the gear connecting rod. The damping gear and the rotary damper are arranged symmetrically in mirror image.

[0005] The advantages of this invention are: The high-precision hinge of the present invention can eliminate the gap in the mechanism by using a set screw and a clamping screw, thereby eliminating backlash and improving the repeatability of the hinge. The high-precision hinge of this invention has a simple structure, is lightweight, and has low cost; The high-precision hinge of this invention integrates a damper to reduce the impact generated when unfolding under heavy load. Attached Figure Description

[0006] Figure 1 An image showing the fully extended state of a high-precision damped hinge. Figure 2 A view of a high-precision damped hinge in its semi-open state. Figure 3 An image showing the retracted state of a high-precision damped hinge. Detailed Implementation

[0007] like Figures 1-3 As shown, a high-precision damped hinge is characterized by comprising a symmetrical hinge 1, a hinge shaft A2, a gear connecting rod 3, an adjusting connecting rod B4, a set screw sleeve 5, an adjusting connecting rod A6, a clamping screw 7, a hinge shaft B8, a locking connecting rod B9, a hinge shaft C10, a locking connecting rod A11, a hinge shaft D12, an unfolding torsion spring 13, and a locking torsion spring 14. The symmetrical hinge 1 is a plate-shaped component with screw mounting holes. One end of the plate has a limiting surface, and one side of the plate has multiple sets of lugs with hinge holes and threaded holes. The hinge shafts A2, B8, C10, and D12 are columnar members; The gear connecting rod 3 is a connecting rod with hinge holes at both ends; The adjusting link B4 is a link with a columnar body at the center. The columnar body has a threaded hole at the center and hinge holes at both ends. The columnar body and the hinge holes are perpendicular to each other. The set screw sleeve 5 is a columnar member with a through threaded hole in the center and a loading plane on the surface for bearing torque. The adjusting link A6 is a link with a stud in the center, and hinge holes are provided at both ends of the link. The stud and the hinge holes are perpendicular to each other. A through hole is provided in the center of the stud. A countersunk hole concentric with the stud is provided on the upper surface of the adjusting link A6. The clamping screw 7 is a screw; Both locking link B9 and locking link A11 are links with hinge holes at both ends; Symmetrical hinge 1 is hinged to gear connecting rod 3 and adjusting connecting rod B4 via hinge shaft A2. The threaded hole of the set screw sleeve 5 is screwed onto the stud of adjusting connecting rod A6. The through hole in the center of the stud of adjusting connecting rod A6 is fitted onto the cylindrical body in the center of adjusting connecting rod B4. The clamping screw 7 is placed in the countersunk hole of adjusting connecting rod A6 and screwed onto the threaded hole in the center of the cylindrical body of adjusting connecting rod B4. Adjusting connecting rod A6 is hinged to locking connecting rod B9 via hinge shaft B8. Locking connecting rod B9 is hinged to locking connecting rod A11 via hinge shaft C10. Locking connecting rod A11 is hinged to symmetrical hinge 1 via hinge shaft D12. The plane containing the axis of the cylindrical body in the center of adjusting connecting rod B4 and the midpoint of gear connecting rod 3 is defined as a mirror plane. Another set of symmetrical hinges 1, hinge shaft B8, locking connecting rod B9, hinge shaft C10, locking connecting rod A11, and hinge shaft D12 are arranged symmetrically relative to the mirror plane. Set screw 5 and clamping screw 7 are used to apply preload force and reduce backlash. After the hinge is unfolded, locking link B9 and locking link A11 form a dead point lock, and the limiting surfaces of symmetrical hinge 1 fit together to limit the movement. Both the unfolding torsion spring 13 and the locking torsion spring 14 are torsion springs. The unfolding torsion spring 13 is sleeved on the hinge shaft A2, and the two ends of the unfolding torsion spring 13 abut against the symmetrical hinge 1 and the gear connecting rod 3 respectively. The locking torsion spring 14 is sleeved on the hinge shaft B8 and the hinge shaft D12. The two ends of the locking torsion spring 14 sleeved on the hinge shaft B8 abut against the adjusting connecting rod A6 and the locking connecting rod B9 respectively. The two ends of the locking torsion spring 14 sleeved on the hinge shaft D12 abut against the locking connecting rod A11 and the symmetrical hinge 1 respectively. The unfolding torsion spring 13 and the locking torsion spring 14 are arranged symmetrically in mirror image.

[0008] It also includes a damping gear 15 and a rotary damper 16; The gear connecting rod 3 has additional tooth surfaces at both ends, and each tooth center has a hinge hole; The damping gear 15 is a gear that can mesh with the gear connecting rod 3, and the damping gear 15 has a through hole in the center; The rotary damper 16 is an accelerator with an input shaft. The input end has a low rotational speed and the output end has a high rotational speed. It can provide rotary damping for the input end and is equipped with screw mounting holes. The rotary damper 16 is fixed to the symmetrical hinge 1 by screws. The through hole of the damping gear 15 is sleeved on the input shaft of the rotary damper 16. The tooth surface of the damping gear 15 meshes with the tooth surface of the gear connecting rod 3. The damping gear 15 and the rotary damper 16 are arranged symmetrically with respect to each other. Work process

[0009] Take a high-precision damped unfolding hinge with a 180° stroke as an example; When there is no external constraint, the high-precision hinge remains in a fully extended state, such as Figure 1 As shown, the plate surfaces of the two symmetrical hinges 1 are coplanar, and the limiting surfaces of the two symmetrical hinges 1 are in contact with each other. The locking link B9 and the locking link A11 are collinear and at the dead point position. The torque of the unfolding torsion spring 13 on the symmetrical hinge 1 tends to unfold the symmetrical hinge 1. The torque of the locking torsion spring 14 on the locking link B9 and the locking link A11 tends to push the hinge shaft C10 away from the hinge. The set screw 5 and the clamping screw 7 apply a preload force, which can keep the hinge shafts A2, B8, C10, and D12 in a one-sided contact state with the symmetrical hinge 1, the locking link B9, the locking link A11, and the adjusting link A6, thus eliminating the backlash in the unfolded state of the hinge. When retraction is needed, push the hinge shaft C10 inward to deflect the locking links B9 and A11 from their dead positions. Then, apply a torque in the retraction direction to the symmetrical hinges 1 until the two symmetrical hinges 1 move to face-to-face parallelism, completing the retraction. Figure 3 As shown; When the constraint that causes the hinge to close is released, the symmetrical hinge 1 unfolds under the unfolding torque of the unfolding torsion spring 13. During the unfolding process, the gear connecting rod 3 is damped by the damping gear 15 and the rotation damper 16, which limits the unfolding rate of the hinge and reduces the impact load on the hinge during the unfolding process.

Claims

1. A high-precision damped hinge, characterized in that, Includes symmetrical hinge (1), hinge shaft A (2), gear connecting rod (3), adjusting connecting rod B (4), set screw sleeve (5), adjusting connecting rod A (6), clamping screw (7), hinge shaft B (8), locking connecting rod B (9), hinge shaft C (10), locking connecting rod A (11), hinge shaft D (12), unfolding torsion spring (13), and locking torsion spring (14); The symmetrical hinge (1) is a plate-shaped part with screw mounting holes on the plate, a limiting surface at one end of the plate, and multiple sets of lugs on one side of the plate, with hinge holes and threaded holes on the lugs. The hinge shafts A (2), B (8), C (10), and D (12) are columnar members; The gear connecting rod (3) is a connecting rod with hinge holes at both ends; The adjusting link B (4) is a link with a columnar body at the center. The columnar body has a threaded hole at the center and hinge holes at both ends. The columnar body and the hinge holes are perpendicular to each other. The set screw sleeve (5) is a columnar part with a through threaded hole in the center and a loading plane on the surface for bearing torque. The adjusting link A (6) is a link with a stud in the center. The two ends of the link are provided with hinge holes. The stud and the hinge holes are perpendicular to each other. The stud is provided with a through hole in the center. The upper surface of the adjusting link A (6) is provided with a countersunk hole concentric with the stud. The clamping screw (7) is a screw; Both locking link B (9) and locking link A (11) are links with hinge holes at both ends; The symmetrical hinge (1) is hinged to the gear connecting rod (3) and the adjusting connecting rod B (4) through the hinge shaft A (2). The threaded hole of the set screw sleeve (5) is screwed onto the stud of the adjusting connecting rod A (6). The through hole in the center of the stud of the adjusting connecting rod A (6) is fitted onto the cylindrical body in the center of the adjusting connecting rod B (4). The clamping screw (7) is placed in the countersunk hole of the adjusting connecting rod A (6). The clamping screw (7) is screwed into the threaded hole in the center of the cylindrical body of the adjusting connecting rod B (4). The adjusting connecting rod A (6) and the locking connecting rod B (9) are hinged to the hinge shaft. B (8) is hinged, locking link B (9) and locking link A (11) are hinged through hinge shaft C (10), locking link A (11) and symmetrical hinge (1) are hinged through hinge shaft D (12), the plane where the axis of the central column of adjusting link B (4) and the midpoint of gear link (3) are defined as the mirror plane, another set of symmetrical hinge (1), hinge shaft B (8), locking link B (9), hinge shaft C (10), locking link A (11) and hinge shaft D (12) are arranged symmetrically relative to the mirror plane; Set screw (5) and clamping screw (7) are used to apply preload and reduce backlash; After the hinge is unfolded, locking link B (9) and locking link A (11) form a dead point lock, and the limiting surfaces of the symmetrical hinge (1) fit together to limit the movement. Both the unfolding torsion spring (13) and the locking torsion spring (14) are torsion springs; The unfolding torsion spring (13) is fitted on the hinge shaft A (2). The two ends of the unfolding torsion spring (13) abut against the symmetrical hinge (1) and the gear connecting rod (3) respectively. The locking torsion spring (14) is fitted on the hinge shaft B (8) and the hinge shaft D (12). The two ends of the locking torsion spring (14) fitted on the hinge shaft B (8) abut against the adjusting connecting rod A (6) and the locking connecting rod B (9) respectively. The two ends of the locking torsion spring (14) fitted on the hinge shaft D (12) abut against the locking connecting rod A (11) and the symmetrical hinge (1) respectively. The unfolding torsion spring (13) and the locking torsion spring (14) are arranged symmetrically in mirror image.

2. The high-precision damped hinge according to claim 1, characterized in that, It also includes a damping gear (15) and a rotary damper (16). The gear connecting rod (3) has additional tooth surfaces at both ends, and the tooth cores at both ends are provided with hinge holes; The damping gear (15) is a gear that can mesh with the gear connecting rod (3), and the damping gear (15) has a through hole in the center; The rotary damper (16) is an accelerator with an input shaft. The input end has a low rotational speed and the output end has a high rotational speed. It can provide rotary damping for the input end and is equipped with screw mounting holes. The rotary damper (16) is fixed to the symmetrical hinge (1) by screws. The through hole of the damping gear (15) is fitted on the input shaft of the rotary damper (16). The tooth surface of the damping gear (15) meshes with the tooth surface of the gear connecting rod (3). The damping gear (15) and the rotary damper (16) are arranged symmetrically in mirror image.

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