CN116221300A

CN116221300A - Ratchet mechanism

Info

Publication number: CN116221300A
Application number: CN202310181326.8A
Authority: CN
Inventors: 孙晨皓; 李军; 董赛亮; 邹嘉玲
Original assignee: China University of Petroleum Beijing
Current assignee: China University of Petroleum Beijing
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-06-06

Abstract

The invention discloses a ratchet mechanism, which relates to the technical field of ratchets and comprises: a stator extending along an axis, the stator having a through hole; the rotor is arranged in the through hole, and a through hole is formed in the rotor along the direction perpendicular to the axis; the sliding piece is arranged in the through hole in a penetrating way and can slide, two ends of the sliding piece can prop against the side wall of the through hole, a first resistance structure is arranged on one side, facing towards the first rotating direction, of at least one end of the sliding piece, a second resistance structure is arranged on one side, facing away from the first rotating direction, of the two ends of the sliding piece respectively, and when the rotor is about to drive the sliding piece to rotate along the first rotating direction, friction force generated between the first resistance structure and the side wall of the through hole enables the rotor to rotate along the first rotating direction; when the rotor is about to drive the sliding piece to rotate along the second rotation direction, the friction force generated by the second resistance structure and the side wall of the through hole enables the rotor to keep static. The ratchet that has the spring among the prior art has can be solved to this application life weak point's problem.

Description

Ratchet mechanism

Technical Field

The invention relates to the technical field of ratchets, in particular to a ratchet mechanism.

Background

The ratchet mechanism is a unidirectional intermittent motion mechanism. Most of the existing ratchet mechanisms at present comprise elastic members such as springs, for example, the elastic members control pawls to prop against a ratchet, so that the ratchet mechanism can only rotate in one direction. Because the ratchet mechanism comprises the spring element, the spring element is always changed between a stretching state and a pressing state and is easy to damage, and the spring element is easy to corrode or permanently deform under severe environments, so that the service life of the ratchet mechanism can be reduced, and the service life of the ratchet mechanism is shortened.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a ratchet mechanism, which can solve the problem of short service life of a ratchet with a spring in the prior art.

The specific technical scheme of the embodiment of the invention is as follows:

a ratchet mechanism, the ratchet mechanism comprising:

a stator extending along an axis, the stator having a through hole;

the rotor is arranged in the through hole, and a through hole is formed in the rotor along the direction perpendicular to the axis;

the sliding piece is arranged in the through hole in a penetrating way, two ends of the sliding piece can prop against the side wall of the through hole, one side, facing towards the first rotating direction, of at least one end of the sliding piece is provided with a first resistance structure, one side, facing away from the first rotating direction, of the two ends of the sliding piece is provided with a second resistance structure, when the rotor is about to drive the sliding piece to rotate along the first rotating direction, friction force generated by the first resistance structure and the side wall of the through hole enables the rotor to rotate along the first rotating direction; when the rotor is about to drive the sliding piece to rotate along a second rotation direction, friction force generated by the second resistance structure and the side wall of the through hole enables the rotor to keep static; the first rotational direction is the opposite direction of the second rotational direction.

Preferably, the axis of the through hole is the same axis as the axis of the rotor.

Preferably, in the radial cross section of the through hole, any straight line passing through the axis of the through hole is equal to the distance between two intersection points of the inner side wall of the through hole.

Preferably, the through hole extends in a straight direction and passes through an axis of the rotor.

Preferably, the structure of both ends of the slider is symmetrical with respect to the center of the slider.

Preferably, on a radial cross section of the through hole, the ends of the two ends of the sliding piece are respectively provided with a first end point and a second end point, the first end point and the second end point are propped against the inner side wall of the through hole, and a connecting line of the first end point and the second end point passes through the axis of the rotor; the first resistance structure is arranged on one side of the first end point and one side of the second end point, which face towards the first rotating direction, respectively, and the second resistance structure is arranged on one side of the first end point and one side of the second end point, which face away from the first rotating direction, respectively; the first resistance structure is lowered in a direction toward the first rotation direction to a lesser extent than the second resistance structure is lowered in a direction away from the first rotation direction.

Preferably, a second edge line of the second resistance structure connected with the first end point or the second end point is located on a straight line formed by the first end point and the second end point.

Preferably, the second resistance structure is stepped.

Preferably, on the radial cross section of the through hole, the curve formed by the inner side wall of the through hole comprises a plurality of sub-curves, the sub-curves are circumferentially distributed around the axis of the through hole, and adjacent sub-curves are connected; each sub-curve comprises two sections of connected constant-speed spirals, and the two sections of constant-speed spirals are symmetrical with a connecting line between the connecting point of the two sections of constant-speed spirals and the axis of the through hole; the number of curves is an odd number.

Preferably, a first edge line of the first resistance structure connected to the first end point or the second end point is lowered more than a constant velocity spiral at a position corresponding to the first end point or the second end point in the first rotation direction; the first edge line is connected to a side wall of the slider.

The technical scheme of the invention has the following remarkable beneficial effects:

the ratchet mechanism can be provided with a through hole in the stator, a rotor capable of rotating is arranged in the through hole, meanwhile, the rotor is provided with a through hole, a sliding piece capable of sliding is arranged in the through hole in a penetrating mode, and two ends of the sliding piece can prop against the side wall of the through hole. Because one side of at least one end of the sliding piece facing the first rotating direction is provided with a first resistance structure, one side of the two ends of the sliding piece facing away from the first rotating direction is provided with a second resistance structure, the friction force generated by the two friction structures and the side wall of the through hole is completely different through the structural difference of the first resistance structure and the second resistance structure, the friction force generated by the side wall of the first resistance structure and the side wall of the through hole enables the sliding piece and the stator to slide relatively so that the rotor can rotate along the first rotating direction, the friction force generated by the second resistance structure and the side wall of the through hole enables the sliding piece and the stator not to slide relatively so that self-locking is generated, so that the rotor keeps static, the rotor in the ratchet mechanism can only rotate towards one direction, and no elastic piece exists in the whole ratchet mechanism, and therefore the service life of the ratchet mechanism under severe environment can be effectively improved.

Specific embodiments of the invention are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.

FIG. 1 is a front view of a ratchet mechanism with a rotor in an initial position in an embodiment of the present invention;

FIG. 2 is a left side view of the rotor in an initial position according to an embodiment of the present invention;

FIG. 3 is an assembly view of a rotor in an initial position and a slider according to an embodiment of the present invention;

FIG. 4 is a schematic view of a slider sliding in a rotor according to an embodiment of the present invention;

fig. 5 is a front view of a rotor in a certain movement position according to an embodiment of the present invention.

Reference numerals of the above drawings:

1. a stator; 11. a through hole; 111. a sub-curve; 2. a rotor; 21. a through hole; 3. a slider; 31. a first resistance structure; 311. a first edge line; 32. a second resistance structure; 321. a second edge line; 33. a first endpoint; 34. a second endpoint.

Detailed Description

The details of the invention will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the invention. However, the specific embodiments of the invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In order to solve the problem of short service life of the ratchet with a spring in the prior art, a ratchet mechanism is proposed in the present application, fig. 1 is a front view of the ratchet mechanism when the rotor is in the initial position in the embodiment of the present invention, fig. 2 is a left view of the rotor is in the initial position in the embodiment of the present invention, fig. 3 is an assembly view of the rotor and the sliding member when the rotor is in the initial position in the embodiment of the present invention, fig. 4 is a schematic view of sliding the sliding member in the rotor in the embodiment of the present invention, and fig. 5 is a front view of the rotor in a certain movement position in the embodiment of the present invention, as shown in fig. 1 to 5, the ratchet mechanism may include: a stator 1 extending along an axis, the stator 1 having a through hole 11; a rotor 2 disposed in the through hole 11, the rotor 2 having a through hole 21 formed in a direction perpendicular to the axis; a slider 3 slidably inserted through the through hole 21.

As shown in fig. 1 and 5, both ends of the sliding member 3 can abut against the side wall of the through hole 11, so that friction forces with different magnitudes can be generated. At least one end of the sliding member 3 has a first resistance structure 31 on a side facing the first rotation direction, and both ends of the sliding member 3 have a second resistance structure 32 on a side facing away from the first rotation direction. As shown in fig. 1, the first rotational direction is clockwise a.

When the rotor 2 is about to drive the slider 3 to rotate in the first rotation direction, the friction force generated by the first resistance structure 31 and the side wall of the through hole 11 enables the rotor 2 to rotate in the first rotation direction. That is, the friction force generated between the first resistance structure 31 and the side wall of the through hole 11 is small, and when the external torque drives the rotor 2 to rotate along the first rotation direction, the rotor 2 can still rotate along the first rotation direction against the friction force generated between the first resistance structure 31 of the sliding member 3 and the side wall of the through hole 11.

When the rotor 2 is about to rotate the slider 3 in the second rotational direction, the rotor 2 is kept stationary by the friction force generated between the second resistance structure 32 and the side wall of the through hole 11. The first rotational direction is the opposite direction of the second rotational direction. As shown in fig. 1 and 5, the second rotational direction is counterclockwise. That is, the friction force generated between the second resistance structure 32 and the side wall of the through hole 11 is larger, when the external torque drives the rotor 2 to rotate along the second rotation direction, the rotor 2 cannot overcome the friction force generated between the second resistance structure 32 of the sliding member 3 and the side wall of the through hole 11, and the rotor 2 is kept stationary.

Specifically, as shown in fig. 1 and 3 to 5, in the radial cross section of the through hole 11, the ends of the two ends of the slider 3 have a first end 33 and a second end 34, respectively, the first end 33 and the second end 34 are abutted against the inner side wall of the through hole 11, and the line connecting the first end 33 and the second end 34 passes through the axis of the rotor 2. The first end point 33 and the second end point 34 are respectively provided with a first resistance structure 31 on one side facing the first rotation direction, and the first end point 33 and the second end point 34 are respectively provided with a second resistance structure 32 on one side facing away from the first rotation direction. The first resistance structure 31 is lowered toward the first rotation direction to a lesser extent than the second resistance structure 32 is lowered away from the first rotation direction, so that the friction force generated by the first resistance structure 31 and the side wall of the through hole 11 when rotated in the first rotation direction is smaller than the friction force generated by the second resistance structure 32 and the side wall of the through hole 11 when rotated in the second rotation direction.

As a possible alternative, the cross section of the through hole 21 may be of various shapes, and in order to avoid the rotor 2 in the through hole 11 from rotating, thereby influencing the positions of the first resistance structure 31 and the second resistance structure 32 towards each other, the through hole 21 needs to be non-circular.

In order to enable the rotor 2 to rotate stably in the stator 1, as shown in fig. 1 and 5, the axis of the through hole 11 and the axis of the rotor 2 may be the same axis.

In the radial cross section of the through hole 11, as shown in fig. 1, the distance between any straight line passing through the axis of the through hole 11 and two intersection points of the inner side wall of the through hole 11 is equal, so that when the rotor 2 rotates to any angle in the through hole 11, both ends of the slider 3 can abut against the side wall of the through hole 11. This enables the ratchet mechanism to have the ability not to rotate in the second rotational direction, no matter what angle the rotor 2 is rotated to.

In order to allow the slider 3 to move back and forth in the through-hole 21 when the rotor 2 rotates the slider 3 in the first rotation direction, the through-hole 21 extends in a straight direction as shown in fig. 3 and 4.

In a specific embodiment, as shown in fig. 1 to 5, the through hole 21 passes through the axis of the rotor 2. The structures at the two ends of the sliding member 3 are symmetrical with respect to the center of the sliding member 3, so that the structure at any one of the two ends of the sliding member 3 can rotate along the first rotation direction due to the friction force generated by the side wall of the through hole 11, and the rotor 2 can keep still due to the friction force generated by the side wall of the through hole 11 when the rotor 2 is about to drive the sliding member 3 to rotate along the second rotation direction.

As shown in fig. 1 and 3, in the radial cross section of the through hole 11, the ends of the two ends of the slider 3 have a first end 33 and a second end 34, respectively, the first end 33 and the second end 34 are abutted against the inner side wall of the through hole 11, and the connection line of the first end 33 and the second end 34 passes through the axis of the rotor 2. The first end point 33 and the second end point 34 are respectively provided with a first resistance structure 31 on one side facing the first rotation direction, and the first end point 33 and the second end point 34 are respectively provided with a second resistance structure 32 on one side facing away from the first rotation direction. In order to make the friction force generated by the first resistance structure 31 and the side wall of the through hole 11 much smaller than the friction force generated by the second resistance structure 32 and the side wall of the through hole 11, the first resistance structure 31 is lowered in the direction toward the first rotation direction to a smaller extent than the second resistance structure 32 is lowered in the direction away from the first rotation direction.

Further, in one possible embodiment, as shown in fig. 3, the second edge line 321 of the second resistance structure 32 connected to the first end point 33 or the second end point 34 is located on a straight line formed by the first end point 33 and the second end point 34. By the above structure, the friction force generated by the second resistance structure 32 and the side wall of the through hole 11 can keep the rotor 2 stationary when the rotor 2 is about to drive the slider 3 to rotate in the second rotation direction.

Further, as shown in fig. 1, 3-5, the second resistance structure 32 is stepped. By the above structure, the second resistance structure 32 can be prevented from interfering with the side wall of the through hole 11 in the process of rotating the sliding part 3 along the first rotating direction by the rotor 2, thereby affecting the rotation of the sliding part 3 along the first rotating direction.

In the radial cross section of the through hole 11, as shown in fig. 1, the curve formed by the inner side wall of the through hole 11 includes a plurality of sub-curves 111. The plurality of sub-curves 111 are circumferentially distributed around the axis of the through hole 11, and adjacent sub-curves 111 are connected. That is, the ends of the adjacent sub-curves 111 are connected to each other such that the rotor 2 rotates the slider 3 during rotation, and the first resistance structure 31 of the slider 3 slides against the sub-curve 111 of the inner side wall of the through hole 11 from one sub-curve 111 to the adjacent other sub-curve 111 and then to the next adjacent sub-curve 111, thus continuously winding the loop.

As a possible possibility, as shown in fig. 1 and 5, each sub-curve 111 comprises two connected constant velocity spirals, which are symmetrical with respect to the line connecting the two equal velocity spirals with the axis of the through hole 11. The number of curves is an odd number. The structure can not only meet the requirement that in the radial cross section of the through hole 11, the distance between any straight line passing through the axis of the through hole 11 and two intersection points of the inner side wall of the through hole 11 are equal; meanwhile, when the rotor 2 drives the sliding part 3 to rotate along the first rotation direction, the sliding part 3 slides back and forth in the through hole 21 due to the action of the sub-curve 111 which is in a constant speed spiral, when the sliding part 3 is driven to slide back and forth in the through hole 21, the side wall of the through hole 11 applies pressure to the sliding part 3 so as to enable the sliding part 3 to slide, once the side wall of the through hole 11 applies pressure to the sliding part 3, friction force is generated between the first resistance structure 31 and the side wall of the through hole 11, and relative sliding can be generated between the first resistance structure 31 and the side wall of the through hole 11 due to small friction force generated between the first resistance structure 31 and the side wall of the through hole 11, so that the rotor 2 can continue to rotate along the first rotation direction. When the rotor 2 is about to drive the sliding element 3 to rotate along the second rotation direction, similarly, due to the action of the sub-curve 111 with the constant velocity spiral, the sliding element 3 is about to slide in the through hole 21, the side wall of the through hole 11 is about to apply pressure to the sliding element 3 so as to enable the sliding element 3 to slide, once the side wall of the through hole 11 applies pressure to the sliding element 3, the second resistance structure 32 and the side wall of the through hole 11 generate friction force, and the rotor 2 is still and cannot rotate along the second rotation direction due to the fact that the friction force generated by the second resistance structure 32 and the side wall of the through hole 11 is larger, so that the self-locking effect is finally achieved.

In a specific embodiment, as shown in fig. 1 and 5, the number of the sub-curves 111 may be three, and the three sub-curves 111 are circumferentially distributed around the axis of the through hole 11.

Further, in the first rotational direction, as shown in fig. 3, the first edge line 311 connected to the first end point 33 or the second end point 34 in the first resistance structure 31 is lowered more than the isokinetic spiral at the corresponding position of the first end point 33 or the second end point 34. The first edge line 311 is connected to the side wall of the slider 3. Through the structure, in the process that the rotor 2 drives the sliding piece 3 to rotate along the first rotating direction, other areas of the first resistance structure 31 except the first end point 33 or the second end point 34 cannot interfere with the side wall of the through hole 11, so that the sliding piece 3 can smoothly rotate along the first rotating direction all the time, other contact points formed by interference between other areas of the first resistance structure 31 except the first end point 33 or the second end point 34 and the side wall of the through hole 11 and other contact points which possibly generate larger friction force with the side wall of the through hole 11 are avoided, and further the sliding piece 3 is prevented from being in a patent along the first rotating direction, and the sliding piece 3 is in a static state.

The ratchet mechanism in the application can set up a through-hole 11 in stator 1, sets up one in through-hole 11 and can carry out pivoted rotor 2, simultaneously, rotor 2 has seted up through-hole 21 to wear to establish in through-hole 21 can gliding slider 3, and the both ends of slider 3 can both support the lateral wall of through-hole 11. Because the at least one end of the sliding piece 3 is provided with the first resistance structure 31 towards one side of the first rotating direction, the two ends of the sliding piece 3 are respectively provided with the second resistance structure 32 at one side of the side opposite to the first rotating direction, the friction force generated by the first resistance structure 31 and the side wall of the through hole 11 is completely different from the friction force generated by the second resistance structure 32 through the structural difference between the two resistance structures 31 and the side wall of the through hole 11, the sliding piece 3 and the stator 1 can slide relatively to enable the rotor 2 to rotate along the first rotating direction, the friction force generated by the second resistance structure 32 and the side wall of the through hole 11 cannot slide relatively to enable the rotor 3 and the stator 1 to slide relatively to generate self-locking, so that the rotor 2 keeps static, the rotor 2 in the ratchet mechanism can only rotate towards one direction, and no elastic piece exists in the whole ratchet mechanism, and the service life of the ratchet mechanism under severe environment can be effectively improved.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. A ratchet mechanism, the ratchet mechanism comprising:

a stator extending along an axis, the stator having a through hole;

2. The ratchet mechanism of claim 1, wherein the axis of the through hole is co-axial with the axis of the rotor.

3. The ratchet mechanism of claim 1, wherein, in a radial cross section of the through hole, any straight line passing through the axis of the through hole is equidistant from two points of intersection of the inner side wall of the through hole.

4. The ratchet mechanism of claim 1, wherein the through-hole extends in a straight direction and passes through an axis of the rotor.

5. The ratchet mechanism of claim 4, wherein the structure of the two ends of the slider is symmetrical with respect to the center of the slider.

6. The ratchet mechanism of claim 5, wherein in a radial cross section of the through hole, ends of both ends of the slider have a first end point and a second end point, respectively, the first end point and the second end point are abutted against an inner side wall of the through hole, and a line connecting the first end point and the second end point passes through an axis of the rotor; the first resistance structure is arranged on one side of the first end point and one side of the second end point, which face towards the first rotating direction, respectively, and the second resistance structure is arranged on one side of the first end point and one side of the second end point, which face away from the first rotating direction, respectively; the first resistance structure is lowered in a direction toward the first rotation direction to a lesser extent than the second resistance structure is lowered in a direction away from the first rotation direction.

7. The ratcheting mechanism of claim 6, wherein a second edge line of the second resistance structure connecting the first end point or the second end point is located on a line formed by the first end point and the second end point.

8. The ratcheting mechanism of claim 7, wherein the second resistance structure is stepped.

9. The ratchet mechanism of claim 6, wherein the curve formed by the inner side wall of the through hole comprises a plurality of sub-curves in a radial cross section of the through hole, wherein the plurality of sub-curves are circumferentially distributed around the axis of the through hole, and adjacent sub-curves are connected; each sub-curve comprises two sections of connected constant-speed spirals, and the two sections of constant-speed spirals are symmetrical with a connecting line between the connecting point of the two sections of constant-speed spirals and the axis of the through hole; the number of curves is an odd number.

10. The ratchet mechanism of claim 9, wherein a degree of descent of a first edge line of the first resistance structure connected to the first end point or the second end point in the first rotational direction is greater than a degree of descent of a constant velocity spiral at a position corresponding to the first end point or the second end point; the first edge line is connected to a side wall of the slider.