CN210599838U - Large-stroke rotating flexible hinge - Google Patents
Large-stroke rotating flexible hinge Download PDFInfo
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- CN210599838U CN210599838U CN201921403023.1U CN201921403023U CN210599838U CN 210599838 U CN210599838 U CN 210599838U CN 201921403023 U CN201921403023 U CN 201921403023U CN 210599838 U CN210599838 U CN 210599838U
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Abstract
The utility model relates to the technical field of flexible hinges, in particular to a large-stroke rotary flexible hinge, which comprises a group of flexible thin sheet groups and two switching blocks, wherein the group of flexible thin sheet groups consists of two U-shaped flexible thin sheets, the two U-shaped flexible thin sheets are arranged between the two switching blocks which are in parallel symmetry in a mirror symmetry manner, the opening directions of the two U-shaped flexible thin sheets are opposite, and the side edge of each U-shaped flexible thin sheet is detachably connected with the two switching blocks; or two groups of flexible thin sheet groups and three switching blocks, wherein the three switching blocks are parallel to each other and arranged in a row at equal intervals, a group of flexible thin sheet groups are detachably connected between every two adjacent switching blocks, and the central axes of the two groups of flexible thin sheet groups are orthogonal in different planes. The utility model has the advantages of simple processing technology, large stroke, difficult stress concentration, difficult damage, high motion precision and the like.
Description
Technical Field
The utility model belongs to the technical field of flexible hinge's technique and specifically relates to indicate a big stroke rotates flexible hinge.
Background
Compliant mechanisms refer to a class of devices that utilize their own elastic deformation to transmit force or displacement. The flexible mechanism has the advantages of no clearance, no lubrication, no assembly, high precision, high rigidity and the like. These advantages are also widely used in many fields such as robotics, precision positioning, medical engineering, and the like. According to the distribution form of the structural deformation, the compliant mechanism can be divided into: distributed compliance mechanisms and centralized compliance mechanisms. The distributed compliant mechanism realizes corresponding functions through the integral deformation of the structure. The centralized compliant mechanism performs its corresponding function primarily by local deformation of some portions of its structure, which correspond to the articulation hinges of traditional rigid mechanisms and are therefore called flexible hinges.
In recent years, with the application and development of flexible hinges in centralized compliant mechanisms, various flexible hinges have been designed and proposed. The flexible positioning platform comprises a V-shaped flexible hinge represented by a notch-type flexible hinge, a semicircular flexible hinge (CN 249740), an elliptical flexible hinge and the like, wherein the hinges often have the advantages of simplicity in processing, high movement precision and the like, and are applied to various planar precise positioning platforms (CN02281262.8 and CN200410080465.9), displacement amplification mechanisms (CN201310112375.2) and the like, but the hinges also often have the defects of small stroke, stress concentration, easiness in damage and the like, so that the physical size of the flexible positioning platform is often much larger than the actually required working space, and the compact design is difficult to realize. Another flexible hinge is a straight beam type flexible hinge (CN201810223057.6), a fork type flexible hinge, a wheel type flexible hinge (CN201210558414.7, CN201610357255.2), a leaf type rotating flexible hinge (CN200710176113.7), a periodic corrugated type flexible hinge (CN201710436668.4, CN201420641408.2), etc., which are represented by a thin sheet type flexible hinge, and these hinges have the advantages of large stroke, uneasy stress concentration, uneasy damage, etc., but because the structure is complicated and has high requirements for the processing technology, in order to obtain a flexible hinge with large stroke and small parasitic displacement, the flexible portion of the flexible hinge is generally required to have a large aspect ratio, and many times, the flexible portion of the flexible hinge is required to have processing technology requirements of 0.1 or even below, which has great challenges for the traditional mechanical processing method.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a big stroke and rotate flexible hinge, have advantages such as processing technology is simple, the stroke is big, difficult stress concentration, difficult quilt destroys, the motion precision is high.
In order to achieve the above object, the present invention provides a technical solution: the utility model provides a flexible hinge is rotated to big stroke, includes a set of flexible thin slice group and two switching pieces, and this group of flexible thin slice group comprises two U-shaped flexible thin slices, and these two U-shaped flexible thin slices are mirror symmetry arrange in between two parallel symmetrical switching pieces, and the opening opposite direction of two U-shaped flexible thin slices, and the side of every U-shaped flexible thin slice is detachable with two switching pieces and is connected.
Furthermore, the switching block is of a square structure and is provided with a plurality of fixing holes; the U-shaped flexible sheet is formed by prepressing and bending a square planar sheet within an elastic deformation range of the sheet, elastic potential energy is stored, two side edges of the U-shaped flexible sheet are rigid fixing areas, mounting holes which correspond to the fixing holes one to one are formed in the rigid fixing areas and are connected with the corresponding fixing holes through the mounting holes, and the arc-shaped bottom edge of the U-shaped flexible sheet is a flexible deformation area.
Further, the ratio of the thickness of the arc bottom edge of the U-shaped flexible sheet to the width of the arc bottom edge is not more than 0.1.
The utility model provides another kind of technical scheme does: the utility model provides a flexible hinge is rotated to big stroke, including two sets of flexible thin slice groups and three switching piece, this three switching piece is parallel to each other and equidistant establishes to one row, detachable being connected with a set of flexible thin slice group between two liang of adjacent switching pieces, wherein, every flexible thin slice group of group includes two U-shaped flexible thin slices, two U-shaped flexible thin slices are the mirror symmetry structure, and the open end opposite direction of these two U-shaped flexible thin slices, the side of every U-shaped flexible thin slice is connected with corresponding two switching pieces, the mutual different face quadrature of center pin of two sets of flexible thin slice groups.
Furthermore, the switching block is circular and is provided with a plurality of fixing holes; the U-shaped flexible sheet is formed by prepressing and bending a round-corner rectangular plane sheet in an elastic deformation range of the plane sheet, elastic potential energy is stored, the U-shaped flexible sheet is flexible as a whole, a plurality of mounting holes which correspond to the fixing holes one by one are formed in the side edge of the U-shaped flexible sheet, and the U-shaped flexible sheet is connected with the corresponding fixing holes through the mounting holes.
Further, the ratio of the thickness to the width of the U-shaped flexible sheet is not more than 0.1.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
1. the utility model discloses a processing technology is simple, and the flexible thin slice of U-shaped is made through the bending of pre-compaction by the plane thin slice, consequently just can obtain the width-to-height ratio through traditional processing methods such as simple laser cutting and be no longer than 0.1's flexible structure, realizes the high flexibility of flexible hinge and big rotation range ratio.
2. The utility model discloses a stroke is big, difficult stress concentration, difficult quilt destroy and the motion precision is high.
Drawings
Fig. 1 is a perspective view of embodiment 1 of the present invention.
Fig. 2 is a front view of embodiment 1 of the present invention.
Fig. 3 is an exploded view of embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of the U-shaped flexible sheet according to embodiment 1 of the present invention returning to the original shape of the flat sheet.
Fig. 5 is a perspective view of embodiment 2 of the present invention.
Fig. 6 is an exploded view of embodiment 2 of the present invention.
Fig. 7 is a schematic diagram of the U-shaped flexible sheet according to embodiment 2 of the present invention returning to the original shape of the flat sheet.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
Example 1
As shown in fig. 1 to 4, the large-stroke rotary flexible hinge according to the present embodiment includes a group of flexible thin sheets and two switching blocks 2, the group of flexible thin sheets includes two U-shaped flexible thin sheets 1, the two U-shaped flexible thin sheets 1 are mirror-symmetrically disposed between the two parallel-symmetric switching blocks 2, the switching blocks 2 are switching portions where the flexible hinge connects other components, the opening directions of the two U-shaped flexible thin sheets 1 are opposite, and a side 11 of each U-shaped flexible thin sheet 1 is detachably connected to the two switching blocks 2; the transfer block 2 is of a square structure, and a plurality of fixing holes 21 are formed in the transfer block; two sides 11 of the U-shaped flexible sheet 1 are rigid fixing areas, mounting holes 12 corresponding to the fixing holes 21 one to one are arranged on the rigid fixing areas, the rigid fixing areas are connected with the corresponding fixing holes 21 through the mounting holes 12, and the arc bottom edges 13 of the rigid fixing areas are flexible deformation areas.
The two U-shaped flexible sheets 1 described in this embodiment are respectively formed by pre-pressing and bending two square planar sheets 3 with the same size and shape within an elastic deformation range (the elastic deformation range refers to a deformation range within which the U-shaped flexible sheet 1 can be restored to an original state after being unloaded), and are installed between the two transfer blocks 2, and have a certain strain energy, so that the flexible hinge has a certain elastic potential energy and a high rotation precision, and the two U-shaped flexible sheets 1 can still be stressed in a balanced manner after being unloaded; when the rotation direction of the flexible hinge is subjected to bending moment, the balance state of the two U-shaped flexible sheets 1 is destroyed, wherein the U-shaped flexible sheet 1 bent along the moment direction is further bent, the other U-shaped flexible sheet 1 is gradually released along with the bending deformation of the flexible hinge, finally, the bending deformation of the two U-shaped flexible sheets 1 is not symmetrical and forms a new balance state with the external moment, at the moment, the flexible hinge rotates by a certain angle due to external load, the ratio of the rotated angle to the external load is the flexibility of the flexible hinge, the relative rotation angle of the two transfer blocks 2 when the flexible hinge is subjected to the external moment is the rotation angle of the flexible hinge, and the rotation angle of the flexible hinge of the embodiment is not less than 10 degrees.
The flexibility ratio refers to the flexibility of the flexible hinge in the main rotation axis direction and the flexibility of other rotation axes, and the main rotation axis of the present embodiment is the Z rotation axis 111, so the rotation flexibility of the flexible hinge along the Z rotation axis 111 is significantly greater than the rotation flexibility of the other two Y rotation axes 112 and the X rotation axis 110, and further the flexibility ratio of the Z rotation axis 111 and the Y rotation axis 112 (or the X rotation axis 110) is sufficiently large, and the general flexibility ratio is at least 10. The ratio of the thickness of the arc bottom edge 13 of the U-shaped flexible sheet 1 to the width thereof is not more than 0.1, so that the flexible deformation area of the flexible hinge has a small aspect ratio, thereby realizing high flexibility and a large rotation range ratio.
Example 2
As shown in fig. 5 to 7, the large-stroke rotary flexible hinge described in this embodiment is a hooke-like hinge space rotation structure composed of two groups of flexible thin sheets and three transfer blocks 2, wherein the three transfer blocks 2 are parallel to each other and arranged in a row at equal intervals, a group of flexible thin sheet groups is detachably connected between every two adjacent transfer blocks 2, each group of flexible thin sheet groups includes two U-shaped flexible thin sheets 1, the two U-shaped flexible thin sheets 1 are mirror-symmetrical structures, the directions of the open ends of the two U-shaped flexible thin sheets 1 are opposite, the side 11 of each U-shaped flexible thin sheet 1 is connected with the corresponding two transfer blocks 2, the central axes of the two groups of flexible thin sheet groups are orthogonal in different planes, and the flexible hinge can rotate around the central axes of the pair of orthogonal in different planes in a large range; the adapter block 2 is circular and is provided with a plurality of fixing holes 21; the U-shaped flexible sheet 1 is formed by prepressing and bending a round-corner rectangular plane sheet 3 in an elastic deformation range of the plane sheet, elastic potential energy is stored, the U-shaped flexible sheet 1 is flexible as a whole, a plurality of mounting holes 12 which are in one-to-one correspondence with the fixing holes 21 are respectively arranged on two side edges 11 of the U-shaped flexible sheet, the U-shaped flexible sheet is connected with the corresponding fixing holes 21 through the mounting holes 12, and the ratio of the thickness to the width of the U-shaped flexible sheet 1 is not more than 0.1; the elastic deformation range refers to a deformation range in which the U-shaped flexible sheet 1 can be restored to the original shape of the planar sheet 3 after being unloaded, and the flexible hinge of the present embodiment has greater flexibility in the Z-axis 111 and the Y-axis 112, similar to the embodiment 1.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a large stroke rotates flexible hinge which characterized in that: the flexible sheet group is composed of two U-shaped flexible sheets, the two U-shaped flexible sheets are arranged between the two parallel and symmetrical switching blocks in mirror symmetry, the opening directions of the two U-shaped flexible sheets are opposite, and the side edge of each U-shaped flexible sheet is detachably connected with the two switching blocks.
2. A large-stroke rotary flexible hinge according to claim 1, wherein: the adapter block is of a square structure and is provided with a plurality of fixing holes; the U-shaped flexible sheet is formed by prepressing and bending a square planar sheet within an elastic deformation range of the sheet, elastic potential energy is stored, two side edges of the U-shaped flexible sheet are rigid fixing areas, mounting holes which correspond to the fixing holes one to one are formed in the rigid fixing areas and are connected with the corresponding fixing holes through the mounting holes, and the arc-shaped bottom edge of the U-shaped flexible sheet is a flexible deformation area.
3. A large-stroke rotary flexible hinge according to claim 1 or 2, wherein: the ratio of the thickness of the arc bottom edge of the U-shaped flexible sheet to the width of the arc bottom edge is not more than 0.1.
4. The utility model provides a large stroke rotates flexible hinge which characterized in that: including two sets of flexible thin slice groups and three switching piece, this three switching piece is parallel to each other and equidistant establishes to one row, detachable a set of flexible thin slice group that is connected with between two liang of adjacent switching pieces, wherein, every flexible thin slice group of group includes two U-shaped flexible thin slices, two U-shaped flexible thin slices are mirror symmetry structure, and the open end opposite direction of these two U-shaped flexible thin slices, the side of every U-shaped flexible thin slice is connected with corresponding two switching pieces, the mutual different face quadrature of center pin of two sets of flexible thin slice groups.
5. A large-stroke rotary flexible hinge according to claim 4, wherein: the adapter block is of a circular structure, and a plurality of fixing holes are formed in the adapter block; the U-shaped flexible sheet is formed by prepressing and bending a round-corner rectangular plane sheet in an elastic deformation range of the plane sheet, elastic potential energy is stored, the U-shaped flexible sheet is flexible as a whole, a plurality of mounting holes which correspond to the fixing holes one by one are formed in the side edge of the U-shaped flexible sheet, and the U-shaped flexible sheet is connected with the corresponding fixing holes through the mounting holes.
6. A large-stroke rotary flexible hinge according to claim 4 or 5, wherein: the ratio of the thickness to the width of the U-shaped flexible sheet is not more than 0.1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921403023.1U CN210599838U (en) | 2019-08-27 | 2019-08-27 | Large-stroke rotating flexible hinge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921403023.1U CN210599838U (en) | 2019-08-27 | 2019-08-27 | Large-stroke rotating flexible hinge |
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| CN210599838U true CN210599838U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439922A (en) * | 2019-08-27 | 2019-11-12 | 华南理工大学 | A kind of big stroke pivoting flexible hinge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439922A (en) * | 2019-08-27 | 2019-11-12 | 华南理工大学 | A kind of big stroke pivoting flexible hinge |
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