CN114321307B - Screw transmission structure - Google Patents
Screw transmission structure Download PDFInfo
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- CN114321307B CN114321307B CN202210047135.8A CN202210047135A CN114321307B CN 114321307 B CN114321307 B CN 114321307B CN 202210047135 A CN202210047135 A CN 202210047135A CN 114321307 B CN114321307 B CN 114321307B
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- nut
- connecting rod
- self
- pressing table
- groove
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 14
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention relates to a screw transmission structure which comprises a first nut 1, a self-locking device 2, a connecting rod 3, a pressing table 4, a groove 5, a second nut 6 and an internal thread 7. The side of the first nut 1 is provided with a groove 5, and the groove 5 is internally provided with a self-locking device 2, a connecting rod 3 and a pressing table 4. The self-locking device 2 is movable in the radial direction of said first nut 1. One end of the connecting rod 3 moves in the groove 5 along the axial direction and the circumferential direction of the first nut 1, the other end of the connecting rod 3 is fixedly connected with the second nut 6, and the two rotate or move together. The pressing table 4 is fixedly connected with the first nut 1, and the pressing table and the first nut rotate or move together. The first nut 1 is coaxial with the second nut 6. The top surface of the pressing table 4 is slightly higher than the bottom surface of the connecting rod 3. The invention realizes that the spiral transmission can have different equivalent friction angles in different motion directions, and besides the self-locking device, the spiral transmission does not need any extra energy source, and is automatically switched when the input is reversed.
Description
Technical Field
The invention relates to the technical field of screw transmission, in particular to a screw transmission structure.
Background
Screw drives are a common type of drive mechanism used in mechanical equipment and are typically moved by relative rotation of the screw and nut in a circumferential direction and relative movement in an axial direction. In general, after the nut and the screw are determined, the equivalent friction angle is also determined, and no matter what the movement direction is, the equivalent friction angle is not changed. But in some cases it is desirable that the nut and the screw have different equivalent friction angles in different directions of movement to achieve different movements of the follower.
Disclosure of Invention
The invention solves the problems that: in screw transmission, the nut is used as a driving piece by using a mechanical structure, and when the movement direction is changed, the equivalent friction angle is also changed.
In order to achieve the above purpose, the invention adopts the following scheme: a screw transmission structure comprises a first nut, a self-locking device, a connecting rod, a pressing table, a groove, a second nut and internal threads. The side face of the first nut is provided with a groove, and a self-locking device, a connecting rod and a pressing table are arranged in the groove. The self-locking device can move along the radial direction of the first nut. One end of the connecting rod moves in the groove along the axial direction and the circumferential direction of the first nut, the other end of the connecting rod is fixedly connected with the second nut, and the connecting rod and the second nut rotate or move together. The pressing table is fixedly connected with the first nut, and the pressing table and the first nut move or rotate together. The first nut is coaxial with the second nut. The top surface of the pressing table is slightly higher than the bottom surface of the connecting rod.
The second nut is used as a driving part and bears load. When the second nut rotates to one side, the connecting rod is driven to rotate along the groove, and when the connecting rod props against one side wall of the groove, the first nut also rotates along with the second nut under the drive of the connecting rod and simultaneously moves along the axial direction of the screw rod.
When the second nut rotates to the other side, the connecting rod is driven to rotate to the other side along the groove, the connecting rod drives to the pressing table, and the self-locking device is pressed back.
When the connecting rod props against the other side wall of the groove, the connecting rod passes through the self-locking device, and the self-locking device stretches out to lock the connecting rod and prevent the connecting rod from sliding out. Because the top surface of the pressing table is higher than the bottom surface of the connecting rod, the connecting rod rises for a certain distance after driving on the pressing table, and the second nut also rises together and is separated from contact with the screw rod, and at the moment, the first nut is in contact with the screw rod. The connecting rod continues to rotate under the drive of the second nut to drive the first nut to rotate and simultaneously moves along the axial direction of the screw rod. When the second nut needs to be reversed, the self-locking device is unlocked, and the connecting rod can drive down the pressing table in the other direction.
When the second nut rotates to one side, the first nut and the second nut are simultaneously contacted with the screw, but only the second nut bears load, and at the moment, the equivalent friction angle between the device and the screw is the equivalent friction angle between the second nut and the screw. When the second nut rotates to the other side, only the first nut contacts with the screw rod and bears load, and the equivalent friction angle between the device and the screw rod is equal to the equivalent friction angle between the first nut and the screw rod.
The first nut is used as a driving part, and the second nut bears load. When the first nut rotates to one side and one side wall of the groove props against the connecting rod, the connecting rod is driven to rotate together, and then the second nut is driven to rotate together, and meanwhile the second nut moves along the axial direction of the screw rod.
When the first nut rotates to the other side, the pressing table is driven to rotate together, and meanwhile, the connecting rod drives on the pressing table and presses the self-locking device back.
When the other side wall of the groove props against the connecting rod, the self-locking device drives over the connecting rod, and the self-locking device stretches out to lock the connecting rod and prevent the connecting rod from sliding out. Because the top surface of the pressing table is higher than the bottom surface of the connecting rod, the connecting rod rises a distance after driving on the pressing table, and the second nut also rises together and is separated from contact with the screw rod, and at the moment, the first nut is contacted. The connecting rod continues to rotate under the drive of the first nut, drives the second nut to rotate, and simultaneously moves along the axial direction of the screw rod. When the first nut needs to be reversed, the self-locking device is unlocked, and the pressing table can be driven out of the connecting rod in the other direction.
When the first nut moves to one side, the first nut and the second nut are simultaneously contacted with the screw, but only the second nut bears load, and at the moment, the equivalent friction angle between the device and the screw is the equivalent friction angle between the second nut and the screw. When the first nut rotates to the other side, only the first nut contacts with the screw rod and bears load, and the equivalent friction angle between the device and the screw rod is equal to the equivalent friction angle between the first nut and the screw rod.
The beneficial effects of the invention are as follows: the invention realizes that the spiral transmission can have different equivalent friction angles in different movement directions.
Besides the self-locking device, the invention does not need any extra energy source and can be automatically switched when the input is reversed.
The invention is applicable to spiral transmission with various sizes and has wide application range.
Drawings
Fig. 1 is a three-dimensional view of the structure of the present invention.
Fig. 2 is a front view of the structure of the present invention.
Fig. 3 is a top view of the structure of the present invention.
Fig. 4 is a structural elevation b of the present invention.
Fig. 5 is a top view b of the structure of the present invention.
Fig. 6 is a structural elevation c of the present invention.
Fig. 7 is a top view of the structure of the present invention, c.
Fig. 8 is a symmetrical structural view of the present invention.
Fig. 9 is a top view of the present invention in two arrangements.
In the figure, 1-first nut, 2-self-locking device, 3-connecting rod, 4-press bench, 5-groove, 6-second nut, 7-internal thread.
Detailed Description
As shown in fig. 1 and 2, a screw transmission structure comprises a first nut 1, a self-locking device 2, a connecting rod 3, a pressing table 4, a groove 5, a second nut 6 and an internal thread 7. The side of the first nut 1 is provided with a groove 5, and the groove 5 is internally provided with a self-locking device 2, a connecting rod 3 and a pressing table 4. The self-locking device 2 is movable in the radial direction of the first nut 1. The connecting rod 3 can move in the groove 5 along the axial direction and the circumferential direction of the first nut 1, the other end of the connecting rod 3 is fixedly connected with the second nut 6, and the two nuts rotate or move together. The pressing table 4 is fixedly connected with the first nut 1, and the pressing table and the first nut move or rotate together. The first nut 1 is coaxial with the second nut 6. The top surface of the pressing table 4 is higher than the bottom surface of the connecting rod 3.
Embodiment one: the second nut 6 is used as a driving part and bears load, as shown in fig. 1,2 and 3, the pressing table 4 and the self-locking device 2 are arranged at the left side of the groove 5. When the second nut 6 rotates rightwards, the connecting rod 3 is driven to rotate along the groove 5, and when the connecting rod 3 props against the right side wall of the groove 5, the first nut 1 also rotates along with the second nut 6 under the driving of the connecting rod 3 and simultaneously moves along the axial direction of the screw rod.
As shown in fig. 4 and 5, when the second nut 6 rotates leftwards, the connecting rod 3 is driven to rotate leftwards along the groove 5, the connecting rod 3 drives onto the pressing table 4, and the self-locking device 2 is pressed back.
As shown in fig. 6 and 7, when the connecting rod 3 abuts against the left side wall of the groove 5, the connecting rod 3 passes through the self-locking device 2, and the self-locking device 2 stretches out to lock the connecting rod 3, so that the connecting rod 3 is prevented from sliding out. Since the top surface of the press table 4 is higher than the bottom surface of the connecting rod 3, the connecting rod 3 will rise a distance after driving on the press table 4, and the second nut 6 will also rise together and be out of contact with the screw, at this time being contacted by the first nut 1. The connecting rod 3 continues to rotate leftwards under the drive of the second nut 6, drives the first nut 1 to rotate leftwards, and simultaneously moves along the axial direction of the screw rod. When the second nut 6 needs to be turned to the right, the self-locking device 2 is unlocked, and the connecting rod 3 can be driven to the right to lower the pressing table 4.
When the second nut 6 rotates rightwards, the first nut 1 and the second nut 6 are simultaneously contacted with the screw, but only the second nut 6 bears the weight, and the equivalent friction angle between the device and the screw is equal to the equivalent friction angle between the second nut 6 and the screw. When the second nut 6 is turned to the left, only the first nut 1 is in contact with the screw while being loaded, and at this time the equivalent friction angle between the device and the screw is the equivalent friction angle of the first nut 1 and the screw.
Embodiment two: the first nut 1 is used as a driving member, the second nut 6 bears load, the pressing table 4 and the self-locking device 2 are arranged on the left side of the groove 5 as shown in fig. 1,2 and 3. When the first nut 1 rotates leftwards and the right side wall of the groove 5 abuts against the connecting rod 3, the connecting rod 3 is driven to rotate together, and then the second nut 6 is driven to rotate together, and meanwhile the second nut and the connecting rod move along the axial direction of the screw rod together.
As shown in fig. 4 and 5, when the first nut 1 rotates rightward, the pressing table 4 is driven to rotate rightward, and the connecting rod 3 drives onto the pressing table 4 and presses the self-locking device 2 back.
As shown in fig. 6 and 7, when the left side wall of the groove 5 abuts against the connecting rod 3, the self-locking device 2 drives over the connecting rod 3, and the self-locking device 2 stretches out to lock the connecting rod 3 and prevent the connecting rod 3 from sliding out. Since the top surface of the press table 4 is higher than the bottom surface of the connecting rod 3, the connecting rod 3 will rise a distance after driving on the press table 4, and the second nut 6 will also rise together and be out of contact with the screw, at this time being contacted by the first nut 1. The connecting rod 3 continues to rotate rightwards under the drive of the first nut 1, drives the second nut 6 to rotate rightwards, and simultaneously moves along the axial direction of the screw rod. When the first nut 1 needs to be rotated leftwards, the self-locking device 2 is unlocked, and the pressing table 4 can be driven out of the connecting rod 3 leftwards.
When the first nut 1 rotates leftwards, the first nut 1 and the second nut 6 are simultaneously contacted with the screw, but only the second nut 6 bears load, and the equivalent friction angle between the device and the screw is equal to the equivalent friction angle between the second nut 6 and the screw. When the first nut 1 rotates rightward, only the first nut 1 contacts the screw while bearing a load, and at this time, the equivalent friction angle between the device and the screw is the equivalent friction angle of the first nut 1 and the screw.
Embodiment III: as shown in fig. 8, the pressing table 4 and the self-locking device 2 are arranged on the right side of the groove 5, and the movement modes of all parts are the same as those of the previous embodiment except that the directions of the parts are opposite to each other to achieve the same effect.
Embodiment four: the screw drive structure may be arranged in any number uniformly along the circumference of the first nut and the second nut, and fig. 9 is a plan view showing the arrangement of the two.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the present invention is not limited to the embodiments described above, but is capable of numerous variations and modifications without departing from the spirit and scope of the invention as hereinafter claimed.
Claims (2)
1. A spiral transmission structure, characterized in that: comprises a first nut (1), a self-locking device (2), a connecting rod (3), a pressing table (4), a groove (5), a second nut (6) and an internal thread (7); the novel nut is characterized in that a groove (5) is formed in the side face of the first nut (1), a self-locking device (2), a connecting rod (3) and a pressing table (4) are arranged in the groove (5), the self-locking device (2) can move along the radial direction of the first nut (1), one end of the connecting rod (3) moves along the axial direction and the circumferential direction of the first nut (1) in the groove (5), the other end of the connecting rod (3) is fixedly connected with the second nut (6), the two nuts rotate or move together, the pressing table (4) is fixedly connected with the first nut (1), the two nuts rotate or move together, the first nut (1) is coaxial with the second nut (6), and the top surface of the pressing table (4) is higher than the bottom surface of the connecting rod (3).
2. A spiral transmission structure, characterized in that: the helical drive may be uniformly arranged in any number along the circumference of the first nut and the second nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210047135.8A CN114321307B (en) | 2022-01-17 | 2022-01-17 | Screw transmission structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210047135.8A CN114321307B (en) | 2022-01-17 | 2022-01-17 | Screw transmission structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114321307A CN114321307A (en) | 2022-04-12 |
| CN114321307B true CN114321307B (en) | 2024-04-26 |
Family
ID=81027340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210047135.8A Active CN114321307B (en) | 2022-01-17 | 2022-01-17 | Screw transmission structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114321307B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4149430A (en) * | 1977-09-26 | 1979-04-17 | The United States Of America As Represented By The Secretary Of The Army | Brake for ball screw |
| WO1987001422A1 (en) * | 1985-09-04 | 1987-03-12 | Fimek Aktiebolag | Screw and nut transmission |
| US5036720A (en) * | 1988-09-22 | 1991-08-06 | Toyota Jidosha Kabushiki Kaisha | Screw-nut feed mechanism |
| WO2006136834A1 (en) * | 2005-06-23 | 2006-12-28 | Stage Technologies Ltd | Drive mechanism |
| CN1948686A (en) * | 2006-10-18 | 2007-04-18 | 南京康尼机电新技术有限公司 | Locking mechanism of passive spiral door machine |
| CN206092849U (en) * | 2016-09-30 | 2017-04-12 | 昆山奥迪尔智能科技有限公司 | Transmission structure |
| CN110195771A (en) * | 2018-11-15 | 2019-09-03 | 段沧桑 | One kind realizes the mechanical mechanism of lifting rotation movement and its synthesis self-locking device of composition |
| CN212657113U (en) * | 2020-06-27 | 2021-03-05 | 罗章平 | Self-locking nut assembly |
| CN215487491U (en) * | 2021-06-03 | 2022-01-11 | 四川大学 | Double-nut spiral transmission device capable of realizing uniform load |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006135038A1 (en) * | 2005-06-17 | 2006-12-21 | Thk Co., Ltd. | Screw device and method of manufacturing the same |
-
2022
- 2022-01-17 CN CN202210047135.8A patent/CN114321307B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4149430A (en) * | 1977-09-26 | 1979-04-17 | The United States Of America As Represented By The Secretary Of The Army | Brake for ball screw |
| WO1987001422A1 (en) * | 1985-09-04 | 1987-03-12 | Fimek Aktiebolag | Screw and nut transmission |
| US5036720A (en) * | 1988-09-22 | 1991-08-06 | Toyota Jidosha Kabushiki Kaisha | Screw-nut feed mechanism |
| WO2006136834A1 (en) * | 2005-06-23 | 2006-12-28 | Stage Technologies Ltd | Drive mechanism |
| CN1948686A (en) * | 2006-10-18 | 2007-04-18 | 南京康尼机电新技术有限公司 | Locking mechanism of passive spiral door machine |
| CN206092849U (en) * | 2016-09-30 | 2017-04-12 | 昆山奥迪尔智能科技有限公司 | Transmission structure |
| CN110195771A (en) * | 2018-11-15 | 2019-09-03 | 段沧桑 | One kind realizes the mechanical mechanism of lifting rotation movement and its synthesis self-locking device of composition |
| CN212657113U (en) * | 2020-06-27 | 2021-03-05 | 罗章平 | Self-locking nut assembly |
| CN215487491U (en) * | 2021-06-03 | 2022-01-11 | 四川大学 | Double-nut spiral transmission device capable of realizing uniform load |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114321307A (en) | 2022-04-12 |
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