CN220227497U - Stepless rotary locking mechanism - Google Patents
Stepless rotary locking mechanism Download PDFInfo
- Publication number
- CN220227497U CN220227497U CN202321975890.9U CN202321975890U CN220227497U CN 220227497 U CN220227497 U CN 220227497U CN 202321975890 U CN202321975890 U CN 202321975890U CN 220227497 U CN220227497 U CN 220227497U
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- 230000005540 biological transmission Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The utility model provides a stepless rotary locking mechanism, which is used for rotary locking between a first component and a second component which rotate relatively, and comprises a first locking component, a second locking component and a driving component, wherein the first locking component and the second locking component are connected with each other in a rotating way, and the first locking component and the second locking component are respectively used for connecting the first component and the second component; a plurality of elastic locking pins are uniformly distributed on the circumference of the first locking component, are arranged towards the second locking component and have elastic force towards the second locking component; the diameter of the elastic locking pin, which is close to one end of the second locking component, is gradually reduced to form a tapered lock; one end of the second locking assembly, which faces the first locking assembly, is provided with a plurality of locking taper holes uniformly distributed on the circumference, the diameter of each locking taper hole is gradually increased towards the first locking assembly, and the circular track uniformly distributed on the circumference of each locking taper hole is identical to that of each elastic locking pin; the driving component is in driving connection with all the elastic locking pins.
Description
Technical Field
The utility model belongs to the technical field of rotating devices, and particularly relates to a stepless rotating locking mechanism.
Background
In industrial equipment such as a medical instrument rotating arm, an automatic mechanical arm and the like, the aspects of free rotation and locking, torque resistance, stability and the like of joints are always cores of product performance, and the joint self-locking capability of the rotating arm when rotating to any angle is particularly important.
The utility model patent with application number 202210729729.7 discloses a locking mechanism of a mechanical arm, which is arranged on the side part of a first movable joint of the mechanical arm, wherein a transmission groove is arranged on the side part of the first movable joint, one end of the first movable joint is connected with a second movable joint, the movable end of a built-in motor at the end part of the second movable joint extends in the transmission groove, a first gear is arranged at the movable end, a rotating shaft is arranged in the transmission groove, a second gear is arranged on the rotating shaft, and the first gear is meshed with the second gear; the motor movable end on be equipped with first disc, be equipped with the second disc on the pivot and be equipped with the clearance between first disc and the second disc.
In the prior art, the mechanical arm joint is locked by friction force, so that a large braking torque cannot be provided, the whole volume is increased along with the increase of the braking torque, and meanwhile, the loading capacity is not high by friction force locking, and the mechanical arm joint is extremely easy to cause abrasion failure after long-time use. In the prior art, friction force is utilized to realize locking, and electromagnetic braking and other modes are adopted, and the electromagnetic braking needs additional electric power to provide power besides the defects. In addition, teeth are machined on the end face or the cylindrical surface in the prior art, and locking is achieved through tooth meshing, but after the locking is carried out at any position in the mode, slight angle offset exists.
Disclosure of Invention
In view of the problems in the background art, it is an object of the present utility model to provide a stepless rotation locking mechanism for rotation locking between a first member and a second member which are relatively rotated, comprising a first locking assembly and a second locking assembly which are rotatably connected to each other, and a driving assembly, the first locking assembly and the second locking assembly being respectively used for connecting the first member and the second member;
a plurality of elastic locking pins are uniformly distributed on the circumference of the first locking component, and the elastic locking pins are arranged towards the second locking component and have elastic force towards the second locking component; the diameter of the elastic locking pin, which is close to one end of the second locking component, is gradually reduced to form a tapered lock;
one end of the second locking assembly, which faces the first locking assembly, is provided with a plurality of locking taper holes uniformly distributed in the circumference, the diameters of the locking taper holes gradually increase towards the first locking assembly, and circular tracks uniformly distributed in the circumference of the plurality of locking taper holes are identical with the plurality of elastic locking pins;
the diameter of the elastic locking pin is the same as that of one end of the locking taper hole, and the diameter of one end of the tapered lock close to the second locking assembly is the same as that of one end of the locking taper hole; the radius difference between the elastic locking pin and one end of the tapered locking head, which is close to the second locking component, is a, a > (L1-L2), L1=pi is D/(n+1), L2=pi is D/n, wherein n is the number of the elastic locking pins, n+1 is the number of the locking taper holes, and D is the diameter of the circular track;
the tapered locking head can be driven into the locking taper hole through elastic force so as to limit relative rotation between the first locking component and the second locking component, and at least one tapered locking head of the first locking component and the second locking component can enter the locking taper hole at any circumferential position;
the driving assembly is in driving connection with all the elastic locking pins, and can simultaneously drive all the elastic locking pins to move away from the locking taper holes against elastic force so as to release rotation restriction.
Preferably, the number of the elastic locking pins is 12, and the number of the tapered locking heads is 13.
Preferably, the first locking assembly comprises a sleeve and a locking ring, both of which are fixedly connected with the first member;
the lock sleeve is uniformly provided with pin holes with the same number as the elastic locking pins along the circumference of the circular track, the pin holes penetrate through the lock sleeve, and the elastic locking pins are connected in the pin holes in a sliding manner;
the lock ring is arranged on one side of the lock sleeve, which is far away from the second locking assembly, and one end of the elastic locking pin, which is close to the lock ring, extends out of the pin hole and is fixedly connected with the lock ring; the elastic locking pin drives the tapered lock head at the other end to extend out of the pin hole through elastic force so as to enter the locking taper hole.
Preferably, the elastic locking pin comprises a locking pin and an elastic member, one end of the elastic member is connected to one end of the locking pin, which is close to the locking ring, and the other end of the elastic member is connected to the locking ring, and the elastic member applies an elastic force to the locking pin towards the second locking assembly.
Preferably, the elastic piece is a spring guide pin.
Preferably, the spring guide pin comprises a spring and a guide pin, and an accommodating hole is formed in one end of the locking pin, which faces the locking ring;
one end of the guide pin is fixedly connected with the lock ring, the other end of the guide pin extends into the accommodating hole, the spring is sleeved on the guide pin, one end of the spring is arranged in the accommodating hole, and the other end of the spring abuts against the lock ring.
Preferably, the driving assembly comprises a driving disc and a driving rod, wherein the driving disc is arranged between the lock sleeve and the lock ring and is positioned among the elastic locking pins;
the elastic locking pins are axially provided with driving grooves towards the outer wall of the driving disc, the circumferential outer ends of the driving disc extend into the driving grooves of all the elastic locking pins, and the driving disc is matched with the inner wall, close to one end of the locking ring, in the driving grooves to drive the elastic locking pins to move away from the locking taper holes;
the driving rod penetrates through the lock sleeve and the second locking assembly, one end of the driving rod is fixedly connected with the driving disc, and the other end of the driving rod extends out of the second locking assembly and is used for being in driving connection with the linear driving mechanism.
Preferably, the second locking assembly comprises a lock column, and a plurality of locking taper holes are formed in one end face of the lock column, which faces the first locking assembly.
Preferably, a rotating hole is formed in the lock column along the axial direction of the lock column, a rotating shaft is fixedly arranged on the first locking assembly, and the rotating shaft penetrates through and is rotationally connected in the rotating hole.
Preferably, a bearing is arranged in the rotary hole, and the rotary shaft is arranged in the bearing in a penetrating manner.
By adopting the technical scheme, the utility model has the following advantages and positive effects compared with the prior art:
according to the utility model, the number of the elastic locking pins is set to be one less than that of the locking taper holes, the size is limited to be a > (L1-L2), L1=pi is equal to D/(n+1), L2=pi is equal to D/n, so that at least one tapered lock head of the first locking component and the second locking component can enter the locking taper holes at any circumferential position to realize locking, stepless rotation locking at any rotation angle is realized, and larger moment can be borne under the condition of smaller volume.
Drawings
The utility model is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of the lock of the present utility model after the sleeve is removed;
FIG. 3 is a schematic view of the utility model in an unlocked state after the lock sleeve is removed;
FIG. 4 is a schematic view of the locking pin and locking taper hole engagement of the present utility model;
FIG. 5 is a partial schematic view of the present utility model;
FIG. 6 is a partial cross-sectional view of the present utility model;
fig. 7 is a dimensional view of a locking pin of the present utility model.
Reference numerals illustrate:
1. an elastic locking pin; 2. a lock sleeve; 3. a locking ring; 4. a rotating shaft; 5. tapered lock; 6. locking the taper hole; 7. a pin hole; 8. a locking pin; 9. a spring guide pin; 10. a spring; 11. a guide pin; 12. a drive plate; 13. a driving rod; 14. a driving groove; 15. locking a column; 16. a bearing; 17. a circular trajectory.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the specific examples. The advantages and features of the present utility model will become more apparent from the following description. It is noted that the drawings are in a very simplified form and utilize non-precise ratios, and are intended to facilitate a convenient, clear, description of the embodiments of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
With reference to fig. 1 to 7, the core of the present utility model is to provide a stepless rotary locking mechanism for rotary locking between a first part and a second part which are relatively rotatable, comprising a first locking assembly and a second locking assembly which are rotatably connected to each other, and a drive assembly, the first locking assembly and the second locking assembly being respectively for connecting the first part and the second part.
A plurality of elastic locking pins 1 are uniformly distributed on the circumference of the first locking component, and the elastic locking pins 1 are arranged towards the second locking component and have elastic force towards the second locking component; the diameter of the elastic locking pin 1 near one end of the second locking assembly gradually decreases to form a tapered lock 5.
The second locking assembly is equipped with a plurality of locking taper holes 6 of circumference equipartition towards the one end of first locking assembly, and the diameter of locking taper hole 6 is crescent towards first locking assembly, and the circular orbit 17 of a plurality of locking taper holes 6 circumference equipartitions is the same with a plurality of elastic locking pin 1.
Specifically, the first locking assembly includes a sleeve 2 and a lock ring 3, both sleeve 2 and lock ring 3 being fixedly attached to the first member. The lock sleeve 2 is uniformly distributed with pin holes 7 with the same number as the elastic locking pins 1 along the circumference of the circular track 17, the pin holes 7 penetrate through the lock sleeve 2, and the elastic locking pins 1 are slidably connected in the pin holes 7. The lock ring 3 is arranged on one side of the lock sleeve 2 far away from the second locking component, and one end of the elastic locking pin 1 close to the lock ring 3 extends out of the pin hole 7 and is fixedly connected with the lock ring 3; the elastic locking pin 1 drives the tapered lock head 5 at the other end to extend out of the pin hole 7 through elastic force so as to enter the locking taper hole 6, and rotary locking between the first locking assembly and the second locking assembly is achieved.
The elastic locking pin 1 includes a locking pin 8 and an elastic member having one end connected to one end of the locking pin 8 near the locking ring 3 and the other end connected to the locking ring 3, the elastic member applying an elastic force to the locking pin 8 toward the second locking assembly. In this embodiment, the elastic member is a spring guide pin 9, the spring guide pin 9 includes a spring 10 and a guide pin 11, one end of the locking pin 8 facing the locking ring 3 is provided with a containing hole, one end of the guide pin 11 is fixedly connected with the locking ring 3, the other end extends into the containing hole, the spring 10 is sleeved on the guide pin 11, one end of the spring is arranged in the containing hole, and the other end of the spring is abutted to the locking ring 3.
The second locking component comprises a lock column 15, and a plurality of locking taper holes 6 are formed in one end face of the lock column 15 facing the first locking component. A rotating hole is arranged in the lock column 15 along the axial direction of the lock column, a rotating shaft 4 is fixedly arranged on the lock sleeve 2, and the rotating shaft 4 penetrates through and is rotationally connected in the rotating hole. Further, a bearing 16 is arranged in the rotating hole, and the rotating shaft 4 is arranged in the bearing 16 in a penetrating way.
The driving component is in driving connection with the locking pins 8, and can simultaneously drive all the locking pins 8 to move away from the locking taper holes 6 against elastic force so as to release rotation restriction. In particular, the drive assembly comprises a drive disc 12 and a drive rod 13, the drive disc 12 being arranged between the sleeve 2 and the locking ring 3 and being located in the middle of the number of resilient locking pins 1. The outer wall of the locking pin 8 facing the driving disc 12 is axially provided with a driving groove 14, the circumferential outer end of the driving disc 12 extends into the driving grooves 14 of all the locking pins 8, and the driving disc 12 is matched with the inner wall of the driving groove 14, which is close to one end of the locking ring 3, so as to drive the elastic locking pin 1 to move away from the locking taper hole 6. The driving rod 13 penetrates through the lock sleeve 2 and the rotating shaft 4 and penetrates through the lock column 15, one end of the driving rod 13 is fixedly connected with the driving disc 12, and the other end of the driving rod extends out of the lock column 15 to be in driving connection with the linear driving mechanism.
In this embodiment, both the tapered locking head 5 and the locking taper hole 6 are conical. Of course, in other embodiments, the locking taper hole 6 may be in a quadrangular pyramid shape, and in order to match the shape of the locking taper hole 6, the tapered end 5 is also in a quadrangular pyramid shape, at this time, the end of the tapered end 5 with a large width is the same as the end of the locking taper hole 6 with a large width, the end of the tapered end 5 with a small width is the same as the end of the locking taper hole 6 with a small width, and a is one half of the difference between the end of the tapered end 5 with a large width and the end with a small width.
In order to realize stepless rotation locking, the diameter of the locking pin 8 is the same as that of one end of the locking taper hole 6, and the diameter of one end of the tapered lock head 5 close to the lock column 15 is the same as that of one end of the locking taper hole 6, which is small in diameter; referring to fig. 7, the diameter of the locking pin 8 is D, the radius difference between the locking pin 8 and the end of the tapered end 5 near the lock cylinder 15 is a, a > (L1-L2), l1=pi×d/(n+1), l2=pi×d/n, where n is the number of locking pins 8, n+1 is the number of locking taper holes 6, and D is the diameter of the circular track 17.
The tapered locking head 5 can be driven into the locking taper hole 6 by elastic force to limit the relative rotation between the lock sleeve 2 and the lock cylinder 15, and at least one tapered locking head 5 of the lock sleeve 2 and the lock cylinder 15 can enter the locking taper hole 6 at any circumferential position due to the limitation of the size, so that stepless rotation locking is realized. And the number of the elastic locking pins 1 is 12 in the embodiment, and the number of the tapered locking heads 5 is 13.
The working process of the utility model is further described below:
in an unlocking state in a normal state, the driving rod 13 and the driving disc 12 are driven to move away from the lock column 15 through an external linear driving mechanism, the driving disc 12 is matched with the inner wall, close to one end of the lock ring 3, in the driving groove 14 to drive the locking pin 8 to move away from the locking taper hole 6 against the elastic force of the spring guide pin 9, so that the tapered lock head 5 leaves the locking taper hole 6, the rotation between the lock sleeve 2 and the lock column 15 is not limited, and the rotation between the first component and the second component is not limited.
When the relative rotation between the first component and the second component needs to be locked, the driving rod 13 and the driving disc 12 are driven to move towards the lock column 15 through an external linear driving mechanism, the driving disc 12 is not matched with the inner wall, close to one end of the lock ring 3, in the driving groove 14, the locking pin 8 moves towards the locking taper hole 6 through the elastic force of the spring guide pin 9, at least one locking pin 8 can enter the locking taper hole 6, and therefore the rotation locking between the lock sleeve 2 and the lock column 15 is achieved, and the rotation locking between the first component and the second component is achieved.
The utility model sets the number of the elastic locking pins 1 to be one less than that of the locking taper holes 6, and limits the size to be a > (L1-L2), L1=pi.D/(n+1), L2=pi.D/n, so that at least one tapered lock head 5 of the first locking component and the second locking component at any circumferential position can enter the locking taper holes 6 to realize locking, thereby realizing stepless rotation locking at any rotation angle and bearing larger moment under the condition of smaller volume. The problem that an existing rotating structure cannot be locked at any angle, or has small-angle deflection after locking, or cannot bear large moment after locking at any angle is solved.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments. Even if various changes are made to the present utility model, it is within the scope of the appended claims and their equivalents to fall within the scope of the utility model.
Claims (10)
1. A stepless rotary locking mechanism for rotary locking between a first part and a second part which rotate relatively, characterized by comprising a first locking assembly and a second locking assembly which are connected with each other in a rotary way, and a driving assembly, wherein the first locking assembly and the second locking assembly are respectively used for connecting the first part and the second part;
a plurality of elastic locking pins are uniformly distributed on the circumference of the first locking component, and the elastic locking pins are arranged towards the second locking component and have elastic force towards the second locking component; the diameter of the elastic locking pin, which is close to one end of the second locking component, is gradually reduced to form a tapered lock;
one end of the second locking assembly, which faces the first locking assembly, is provided with a plurality of locking taper holes uniformly distributed in the circumference, the diameters of the locking taper holes gradually increase towards the first locking assembly, and circular tracks uniformly distributed in the circumference of the plurality of locking taper holes are identical with the plurality of elastic locking pins;
the diameter of the elastic locking pin is the same as that of one end of the locking taper hole, and the diameter of one end of the tapered lock close to the second locking assembly is the same as that of one end of the locking taper hole; the radius difference between the elastic locking pin and one end of the tapered locking head, which is close to the second locking component, is a, a > (L1-L2), L1=pi is D/(n+1), L2=pi is D/n, wherein n is the number of the elastic locking pins, n+1 is the number of the locking taper holes, and D is the diameter of the circular track;
the tapered locking head can be driven into the locking taper hole through elastic force so as to limit relative rotation between the first locking component and the second locking component, and at least one tapered locking head of the first locking component and the second locking component can enter the locking taper hole at any circumferential position;
the driving assembly is in driving connection with all the elastic locking pins, and can simultaneously drive all the elastic locking pins to move away from the locking taper holes against elastic force so as to release rotation restriction.
2. The stepless rotation locking mechanism of claim 1, wherein the number of elastic locking pins is 12, and the number of tapered locking heads is 13.
3. The stepless rotary locking mechanism of claim 1, wherein the first locking assembly comprises a sleeve and a locking ring, both of which are fixedly attached to the first member;
the lock sleeve is uniformly provided with pin holes with the same number as the elastic locking pins along the circumference of the circular track, the pin holes penetrate through the lock sleeve, and the elastic locking pins are connected in the pin holes in a sliding manner;
the lock ring is arranged on one side of the lock sleeve, which is far away from the second locking assembly, and one end of the elastic locking pin, which is close to the lock ring, extends out of the pin hole and is fixedly connected with the lock ring; the elastic locking pin drives the tapered lock head at the other end to extend out of the pin hole through elastic force so as to enter the locking taper hole.
4. A stepless rotation locking mechanism according to claim 3, characterized in that the elastic locking pin comprises a locking pin and an elastic member, one end of the elastic member is connected to one end of the locking pin close to the locking ring, the other end is connected to the locking ring, the elastic member applies an elastic force to the locking pin towards the second locking assembly.
5. The stepless rotation locking mechanism of claim 4, wherein said elastic member is a spring guide pin.
6. The stepless rotary locking mechanism of claim 5, wherein the spring guide pin comprises a spring and a guide pin, and the end of the locking pin facing the locking ring is provided with a containing hole;
one end of the guide pin is fixedly connected with the lock ring, the other end of the guide pin extends into the accommodating hole, the spring is sleeved on the guide pin, one end of the spring is arranged in the accommodating hole, and the other end of the spring abuts against the lock ring.
7. A stepless rotary locking mechanism according to claim 3, wherein the drive assembly comprises a drive disc and a drive rod, the drive disc being located between the lock sleeve and the lock ring and intermediate a number of the resilient locking pins;
the elastic locking pins are axially provided with driving grooves towards the outer wall of the driving disc, the circumferential outer ends of the driving disc extend into the driving grooves of all the elastic locking pins, and the driving disc is matched with the inner wall, close to one end of the locking ring, in the driving grooves to drive the elastic locking pins to move away from the locking taper holes;
the driving rod penetrates through the lock sleeve and the second locking assembly, one end of the driving rod is fixedly connected with the driving disc, and the other end of the driving rod extends out of the second locking assembly and is used for being in driving connection with the linear driving mechanism.
8. The stepless rotary locking mechanism of claim 1, wherein the second locking assembly comprises a lock cylinder, and a plurality of locking taper holes are formed on an end face of the lock cylinder facing the first locking assembly.
9. The stepless rotary locking mechanism of claim 8, wherein a rotary hole is arranged in the lock cylinder along the axial direction of the lock cylinder, a rotary shaft is fixedly arranged on the first locking component, and the rotary shaft penetrates through and is rotationally connected in the rotary hole.
10. The stepless rotation locking mechanism of claim 9, wherein a bearing is disposed in the rotation hole, and the rotation shaft is inserted into the bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321975890.9U CN220227497U (en) | 2023-07-26 | 2023-07-26 | Stepless rotary locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321975890.9U CN220227497U (en) | 2023-07-26 | 2023-07-26 | Stepless rotary locking mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220227497U true CN220227497U (en) | 2023-12-22 |
Family
ID=89178378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321975890.9U Active CN220227497U (en) | 2023-07-26 | 2023-07-26 | Stepless rotary locking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220227497U (en) |
-
2023
- 2023-07-26 CN CN202321975890.9U patent/CN220227497U/en active Active
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