阅读说明：本技术 一种扭矩限制离合器 (Torque limiting clutch ) 是由 王辉 陈源 陈俊宏 熊鹏生 陶欢 林剑华 骆书芳 陈博贤 李玉兰 李德恒 林剑荣 于 2021-08-23 设计创作，主要内容包括：本发明提供了一种扭矩限制离合器,涉及安全离合器技术领域。其中,这种扭矩限制离合器包含第一旋转组件、第二旋转组件和传动结构。第一旋转组件包括第一旋转件和可滑动的配置于第一旋转件的传动件。第二旋转组件包括可转动的配置于第一旋转件的第二旋转件。传动结构包括可转动的配置于第一旋转件的基座,以及可滑动的配置于基座的驱动件。基座和驱动件之间形成有密封腔。传动结构还包括配置于传动件和第二旋转件之一的多个旋转凸起,和另一的多个啮合槽。旋转凸起和啮合槽相向设置。通过流体来控制啮合槽和旋转凸起啮合,当扭矩较大时,流体被压缩使得啮合槽和旋转凸起脱离,从而避免驱动端发生损坏。(The invention provides a torque limiting clutch, and relates to the technical field of safety clutches. Wherein the torque limiting clutch comprises a first rotating component, a second rotating component, and a transmission structure. The first rotating assembly comprises a first rotating piece and a transmission piece which is configured on the first rotating piece in a sliding way. The second rotating assembly comprises a second rotating piece which is rotatably arranged on the first rotating piece. The transmission structure comprises a base which is rotatably arranged on the first rotating piece and a driving piece which is arranged on the base in a sliding way. A sealed cavity is formed between the base and the driving member. The transmission structure further comprises a plurality of rotating protrusions arranged on one of the transmission member and the second rotating member, and a plurality of engaging grooves arranged on the other one of the transmission member and the second rotating member. The rotating protrusion and the engaging groove are oppositely arranged. The engagement of the engagement groove and the rotary protrusion is controlled by fluid, and when the torque is large, the fluid is compressed to disengage the engagement groove and the rotary protrusion, thereby preventing the driving end from being damaged.)

1. A torque limiting clutch, comprising:

a first rotating assembly comprising a first rotating member (1) and a transmission member (8) slidably arranged on the first rotating member (1);

a second rotating assembly comprising a second rotating member (13) rotatably arranged on the first rotating member (1);

the transmission structure comprises a base (3) which is rotatably arranged on the first rotating piece (1) and a driving piece (2) which is arranged on the base (3) in a sliding way; a sealed cavity (4) is formed between the base (3) and the driving piece (2); the base (3) is provided with a first flow passage (14) communicated with the sealing cavity (4); the transmission structure further comprises a plurality of rotating protrusions rotatably arranged on one of the transmission member (8) and the second rotating member (13), and a plurality of engaging grooves (16) provided on the other of the transmission member (8) and the second rotating member (13); the rotating protrusion and the engaging groove (16) are oppositely arranged;

the driving piece (2) is used for driving the driving piece (8) to be close to the second rotating piece (13) when fluid enters the sealed cavity (4) through the first flow passage (14) so that the rotating protrusions are embedded into the engaging grooves (16) to enable the first rotating piece (1) and the second rotating piece (13) to rotate synchronously.

2. A torque limiting clutch according to claim 1, characterized in that there is a one-to-one correspondence between a plurality of said rotary protrusions and a plurality of said engagement grooves (16) and configured such that only one angle can be coincident when said transmission member (8) is rotated relative to said second rotary member (13).

3. A torque limiting clutch according to claim 1, characterized in that the transmission structure further comprises a plurality of disc springs (11) arranged at the first rotational member (1) and abutting against the transmission member (8); the disc springs (11) are used for driving the transmission piece (8) to move towards the direction away from the second rotating piece (13).

4. A torque limiting clutch according to claim 1, characterized in that said transmission structure comprises a mounting seat (5) arranged on said base (3); the mounting seat (5) extends from the base (3) to the side surface of the transmission part (8) and is used for mounting a detection head;

the transmission part (8) is provided with a detection groove (7) for detecting the detection head.

5. A torque limiting clutch according to claim 4, characterized in that said second rotary member (13), said transmission member (8), said base (3) and said driving member (2) are all of annular configuration and are nested in said first rotary member (1);

the transmission piece (8) is provided with a circular ring bulge (6) extending towards the driving piece (2); the circular ring bulge (6) at least covers part of the side surface of the driving piece (2); the detection groove (7) is arranged on the outer surface of the circular ring bulge (6).

6. A torque limiting clutch according to claim 1, characterized in that said transmission member (8) and said second rotary member (13) are provided with a first end face and a second end face, respectively, which are oppositely disposed; one of the first end face and the second end face is provided with an annular groove (15); the other one of the first end face and the second end face is provided with an annular bulge (17) matched with the annular groove (15); the annular projection (17) is arranged in the annular groove (15); the engagement groove (16) is provided in the annular projection (17).

7. A torque limiting clutch according to claim 6, characterized in that said annular groove (15) is provided in said second rotational member (13); the meshing bulge is a roller (10) or a ball which can be arranged in a rotating way; when the engaging projection is a roller (10):

the second rotating member (13) is provided with a plurality of column holes which are arranged along the radial direction of the annular groove (15) and are communicated with the annular groove (15);

the transmission structure also comprises rollers (10) arranged in the plurality of column holes and a fixed ring (9) sleeved on the second rotating piece (13) and used for preventing the rollers (10) from falling out of the column holes.

8. A torque limiting clutch according to claim 2 wherein said rotating lobes are 6 in number; included angles among the six rotating protrusions are a, b, c, d and e respectively; wherein a < c < e, and b ═ d.

9. The torque limiting clutch of claim 8, wherein a is 15 °, c is 30 °, e is 45 °, and b is 90 °.

10. A torque limiting clutch according to any one of claims 1 to 9, characterized in that the transmission member (8) is slidably arranged to the first rotational member (1) by means of a splined connection;

the second rotating member (13) is rotatably arranged on the first rotating member (1) through two bearings; a gasket is arranged between the two bearings; the second rotating piece (13) is provided with a flange hole (12);

the base (3) is rotatably arranged on the first rotating member (1) through a bearing; the base (3) is provided with a fixing threaded hole for fixing to an external object through a screw rod, and the base (3) and the first rotating piece (1) can be prevented from rotating;

and a Y-shaped sealing ring is arranged between the base (3) and the driving piece (2).

Technical Field

The invention relates to the field of safety clutches, in particular to a torque limiting clutch.

Background

The coupling is used for connecting the driving end and the load end, and when the load end needs power, the power of the driving end is transmitted to the load end. It is desirable to prevent overloading loads and damage to power equipment when transmitting torque in certain situations. When the clutch is overloaded, the clutch needs to slip and can be stopped in time to avoid loss by giving an alarm through electronic detection equipment.

The existing clutch on the market mainly adopts a manual adjustment steel ball type clutch, the requirement of the manual operation on an operator is higher, the adjustment torque is inaccurate, the transmitted torque is smaller, and the service life is shorter.

In view of the above, the applicant has specifically proposed the present application after studying the existing technologies.

Disclosure of Invention

The invention provides a torque limiting clutch, aiming at solving the problem that the torque of the clutch cannot be accurately adjusted.

In order to solve the above technical problem, the present invention provides a torque limiting clutch, which includes a first rotating component, a second rotating component and a transmission structure.

The first rotating assembly comprises a first rotating piece and a transmission piece which is configured on the first rotating piece in a sliding way;

the second rotating component comprises a second rotating piece which is rotatably arranged on the first rotating piece;

the transmission structure comprises a base which is rotatably arranged on the first rotating piece and a driving piece which is arranged on the base in a sliding way; a sealed cavity is formed between the base and the driving piece; the base is provided with a first flow passage communicated with the sealing cavity; the transmission structure further comprises a plurality of rotating protrusions rotatably arranged on one of the transmission member and the second rotating member, and a plurality of engaging grooves arranged on the other of the transmission member and the second rotating member; the rotating protrusion and the meshing groove are arranged oppositely;

the driving piece is used for driving the driving piece to be close to the second rotating piece when fluid enters the sealed cavity through the first flow passage, so that the rotating protrusions are embedded into the engaging grooves, and the first rotating piece and the second rotating piece rotate synchronously.

In an alternative embodiment, a plurality of the rotating protrusions and a plurality of the engaging grooves are in one-to-one correspondence, and are configured such that only one angle can be overlapped when the transmission member rotates relative to the second rotating member.

In an optional embodiment, the transmission structure further includes a plurality of disc springs disposed on the first rotating member and abutting against the transmission member; the disc springs are used for driving the transmission piece to move towards a direction far away from the second rotating piece.

In an optional embodiment, the transmission structure further comprises a mounting seat configured on the base; the mounting seat extends from the base to the side surface of the transmission part and is used for mounting a detection head;

the transmission part is provided with a detection groove for detecting the detection head.

In an alternative embodiment, the second rotating member, the transmission member, the base and the driving member are all annular structures and are all sleeved on the first rotating member;

the transmission part is provided with a circular ring bulge extending towards the driving part; the circular ring bulge at least covers part of the side surface of the driving piece; the detection groove is arranged on the outer surface of the circular ring bulge.

In an alternative embodiment, the transmission member and the second rotating member are respectively provided with a first end surface and a second end surface which are oppositely arranged; one of the first end face and the second end face is provided with an annular groove; the other one of the first end surface and the second end surface is provided with an annular bulge matched with the annular groove; the annular bulge is arranged in the annular groove; the engagement groove is provided in the annular projection.

In an alternative embodiment, the annular groove is provided in the second rotating member; the meshing bulge is a roller or a ball which can be arranged in a rotating way; when the engaging projection is a roller:

the second rotating piece is provided with a plurality of column holes which are arranged along the radial direction of the annular groove and are communicated with the annular groove;

the transmission structure also comprises rollers arranged in the plurality of column holes and a fixed ring sleeved on the second rotating piece and used for preventing the rollers from falling out of the column holes.

In an alternative embodiment, the number of the rotating protrusions is 6; included angles among the six rotating protrusions are a, b, c, d and e respectively; wherein a < c < e, and b ═ d.

In an alternative embodiment, a is 15 °, c is 30 °, e is 45 °, and b is 90 °.

In an alternative embodiment, the transmission member is slidably disposed on the first rotating member through a spline connection;

the second rotating member is rotatably configured on the first rotating member through two bearings; a gasket is arranged between the two bearings; the second rotating piece is provided with a flange hole;

the base is rotatably configured on the first rotating piece through a bearing; the base is provided with a fixing threaded hole for fixing to an external object through a screw rod, and the base and the first rotating piece can be prevented from rotating;

and a Y-shaped sealing ring is arranged between the base and the driving piece.

By adopting the technical scheme, the invention can obtain the following technical effects:

the transmission member and the second rotating member are controlled to be engaged by fluid, and the transmission member and the second rotating member are engaged by engagement grooves and rotation protrusions which are arranged in opposite directions. When the torque received by the clutch is large, the fluid is compressed to enable the meshing groove and the rotating protrusion to be separated, and the clutch slips, so that the situation that the driving end is damaged under the condition of overlarge load is avoided, and the clutch has good practical significance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a half-sectional view of a torque limiting clutch.

FIG. 2 is a left side view of the torque limiting clutch.

Fig. 3 is a cross-sectional view of the first rotating assembly at the roller.

Fig. 4 is a sectional view of the second rotating assembly at the engagement groove.

The labels in the figure are: 1-a first rotating member, 2-a driving member, 3-a base, 4-a sealing cavity, 5-a mounting seat, 6-a circular ring protrusion, 7-a detection groove, 8-a driving member, 9-a fixed ring, 10-a roller, 11-a disc spring, 12-a flange hole, 13-a second rotating member, 14-a first flow passage, 15-an annular groove, 16-an engaging groove and 17-an annular protrusion.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

as shown in fig. 1-4, an embodiment of the present invention provides a torque limiting clutch including a first rotating component, a second rotating component, and a transmission structure.

The first rotating assembly comprises a first rotating member 1 and a transmission member 8 slidably disposed on the first rotating member 1.

The second rotating assembly comprises a second rotating member 13 rotatably disposed on the first rotating member 1.

The transmission structure comprises a base 3 rotatably arranged on the first rotating member 1, and a driving member 2 slidably arranged on the base 3. A sealed cavity 4 is formed between the base 3 and the driver 2. The base 3 is provided with a first flow passage 14 communicating with the sealed chamber 4. The transmission structure further includes a plurality of rotating protrusions rotatably provided on one of the transmission member 8 and the second rotating member 13, and a plurality of engaging grooves 16 provided on the other of the transmission member 8 and the second rotating member 13. The rotation projection and the engagement groove 16 are disposed opposite to each other.

The driving member 2 is used for driving the driving member 8 to approach the second rotating member 13 when the fluid enters the sealed cavity 4 through the first flow passage 14, so that the rotating protrusions are embedded into the engaging grooves 16, and the first rotating member 1 and the second rotating member 13 rotate synchronously.

Specifically, the transmission member 8 is slidably disposed on the first rotating member 1, and the second rotating member 13 is rotatably disposed on the first rotating member 1. The transmission member 8 and the second rotation member 13 are provided with a rotatable rotation projection and an engagement groove 16, respectively. The driving element 8 is driven by the driving element 2 movably arranged on the base 3 to approach the second rotating element 13, so that the rotating protrusions are inserted into the engaging grooves 16, thereby allowing the first rotating element 1 and the second rotating element 13 to rotate synchronously.

The base 3 is rotatably disposed on the first rotating member 1, and the driving member 2 is slidably disposed on the base 3. A sealed chamber 4 is formed between the base 3 and the driver 2. The base 3 is provided with a first flow passage 14 communicating with the sealed chamber 4. The pressure of the fluid in the sealed chamber 4 is regulated by the first flow passage 14, thereby controlling the movement of the driver 2. Preferably, the fluid entering the capsule 4 is a gas. Gas is used to drive the driving member 2 so that it pushes the driving member 8 close to the second rotating member 13, with the rotating protrusions engaging the engaging grooves 16. Because the gas has better compression performance, the gas can be compressed under the condition that the torque of the load end is larger, so that the rotating protrusion is separated from the meshing groove 16, the clutch slips, the condition that the driving end is damaged under the condition of overlarge load is avoided, and the gas compression clutch has good practical significance.

As shown in fig. 1, in the present embodiment, the transmission structure further includes a plurality of disc springs 11 disposed on the first rotating member 1 and abutting against the transmission member 8. The plurality of disc springs 11 are used for driving the transmission member 8 to move in a direction away from the second rotating member 13. Specifically, the plurality of disc springs 11 are arranged on the first rotating member 1, so that when the air pressure in the sealed cavity 4 is small, the transmission member 8 can be far away from the second rotating member 13, the rotating protrusions and the meshing grooves 16 are separated, and the practical significance is good. In other embodiments, the driving member 2 can also actively drive the transmission member 8 away from the second rotating member 13.

In the present embodiment, the base 3 is rotatably disposed on the first rotating member 1 through a bearing. The base 3 is provided with a fixing screw hole for fixing to an external object by a screw, and the base 3 and the first rotary member 1 can be prevented from rotating. The driving element 2 and the transmission element 8 are in transmission connection through a bearing. The inner race of the bearing is disposed on the first rotating member 1. The driving element 2 is connected with the outer ring of the bearing in an abutting mode, and the transmission element 8 is connected with the inner ring of the bearing in an abutting mode. The inner rings of the transmission piece 8 and the bearing and the first rotating piece 1 synchronously rotate, the driving piece 2 does not rotate relative to the external environment, and the driving piece 2 is effectively prevented from being abraded. Preferably, a Y-ring seal is provided between the base 3 and the driver 2, so that a sealed chamber 4 is formed between the base 3 and the driver 2. In other embodiments, the driving member 2 and the base 3 may be connected in a sealing manner by using a sealing ring with other structure, such as an O-ring, etc., and the invention is not limited thereto.

As shown in fig. 1, in an alternative embodiment of the present invention, on the basis of the above-mentioned embodiment, the transmission member 8 and the second rotating member 13 are respectively provided with a first end face and a second end face which are oppositely arranged. One of the first and second end faces is provided with an annular groove 15. The other of the first and second end surfaces is provided with an annular projection 17 adapted to the annular groove 15. An annular projection 17 is provided in the annular groove 15. The engagement groove 16 is provided in the annular projection 17. Specifically, the annular groove 15 is provided in the second rotating member 13. The engaging projections are rotatably arranged rollers 10 or balls. With rotatory protruding setting on second rotating member 13, not only can let the structure of driving medium 8 simpler, can alleviate the quality of driving medium 8 moreover, make it more easily driven by driving piece 2, have fine practical meaning.

In this embodiment, the engaging projections are rollers 10. The second rotary member 13 is provided with a plurality of column holes provided along the radial direction of the annular groove 15 and communicating with the annular groove 15. The transmission structure further comprises rollers 10 arranged in the plurality of column holes and a fixed ring 9 sleeved on the second rotating member 13 and used for preventing the rollers 10 from falling out of the column holes. Specifically, the rollers 10 are arranged in the annular groove 15 through the post holes provided in the radial direction to form a circular arc-shaped protrusion in the annular groove 15. And through set up a solid fixed ring 9 in the position of post hole, can effectually prevent that roller 10 from breaking away from in the post hole, have fine practical meaning. Preferably, the diameter of the transmission member 8 is not smaller than that of the fixing ring 9, so as to limit the fixing ring 9 from disengaging from the second rotating member 13, and further ensure the stability of the transmission structure. The rotary bulge is arranged into the structure of the roller 10, so that the annular bulge 17 is in line contact with the rotary bulge, the contact area is greatly increased, the pressure is reduced, the abrasion is avoided, the service life of the clutch is prolonged, the contact area between the roller 10 and the meshing groove 16 is increased, larger torque can be transmitted, and the rotary clutch has good practical significance.

As shown in fig. 3 and 4, in an alternative embodiment of the present invention based on the above-mentioned embodiments, there is a one-to-one correspondence between the plurality of rotating protrusions and the plurality of engaging grooves 16, and the rotating protrusions and the engaging grooves are configured such that only one angle can be overlapped when the transmission member 8 rotates relative to the second rotating member 13. It will be appreciated that the greater the number of rotary lobes and engagement grooves 16, the better the transmission. The number of the rotation projections and the engagement grooves 16 may be set to one at a minimum. The plurality of rotary protrusions are arranged to rotate by 306 degrees, only one angle can be overlapped (namely only one angle can be meshed), so that when the meshing groove 16 and the roller 10 are separated due to overlarge torque, only one collision happens when the rotary protrusions rotate by one circle, the collision frequency is effectively reduced, and the service life of the torque limiting clutch is prolonged.

As shown in fig. 3 and 4, on the basis of the above embodiments, in an alternative embodiment of the present invention, the number of the rotating protrusions is 6. The included angles among the six rotating protrusions are a, b, c, d and e respectively. The rotation angle between the first rotating projection and the second rotating projection is a, the rotation angle between the second rotating projection and the third rotating projection is b, the rotation angle between the third rotating projection and the fourth rotating projection is c, the rotation angle between the fourth rotating projection and the fifth rotating projection is d, and the rotation angle between the fifth rotating projection and the sixth rotating projection is e. Wherein a < c < e, and b ═ d. Preferably, a is 15 °, c is 30 °, e is 45 °, and b is 90 °.

Specifically, six rotary protrusions can ensure that the annular protrusion 17 can be at least under the supporting force action of the rotary protrusions with three different angles when the meshing groove 16 and the rotary protrusions are separated, so that the stress concentration is avoided, and the rotary gear has good practical significance.

As shown in fig. 1, on the basis of the above embodiment, in an alternative embodiment of the present invention, the transmission structure further includes a mounting seat 5 disposed on the base 3. The mounting base 5 extends from the base 3 to the side of the transmission member 8 for mounting the detection head. The transmission member 8 is provided with a detection groove 7 for detection of the detection head. Specifically, the detection head is an inductive switch for detecting the detection groove 7, when the engagement groove 16 is engaged with the rotary protrusion, the transmission member 8 is close to the second rotary member 13, and the inductive switch detects the outer surface of the transmission member 8 (i.e., the detection plane is closer to the inductive switch). When the engaging groove 16 and the rotary protrusion are disengaged, the annular protrusion 17 is lifted by the rotary protrusion, the transmission member 8 is away from the second rotary member 13, and the sensing groove 7 is detected by the sensing switch (i.e., the sensing plane is relatively far away from the sensing switch). Whether meshing between the transmission member 8 and the second rotating member 13 is detected through the detection head, the pressure in the sealed cavity 4 is timely reduced when the transmission member and the second rotating member are separated, and the driving end is controlled to stop running, so that long-time idling is avoided, and the service life is further prolonged.

As shown in fig. 1, in an alternative embodiment of the present invention based on the above embodiment, the second rotating member 13, the transmission member 8, the base 3 and the driving member 2 are all in a ring structure and are all sleeved on the first rotating member 1. The transmission element 8 is provided with an annular projection 6 extending towards the drive element 2. The annular projection 6 covers at least part of the side of the drive element 2. The detection groove 7 is arranged on the outer surface of the circular ring bulge 6. Overlap through driving medium 8 and driving piece 2 surface with first rotating member 1 parcel inside to avoid debris to get into, influence the cooperation between the spare part, have fine practical meaning. Preferably, the transmission member 8 is slidably disposed on the first rotating member 1 by spline connection. The second rotating member 13 is rotatably disposed on the first rotating member 1 via two bearings. A washer is arranged between the two bearings. The second rotation member 13 is provided with a flange hole 12.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.