CN217558831U

CN217558831U - Full disconnect-type torque limiter

Info

Publication number: CN217558831U
Application number: CN202221122880.6U
Authority: CN
Inventors: 陈代国
Original assignee: Chongqing Mishkin Automation Technology Co ltd
Current assignee: Chongqing Mishkin Automation Technology Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-10-11
Anticipated expiration: 2032-05-11

Abstract

The utility model discloses a full-separation type torque limiter, which relates to the technical field of torque transmission equipment and comprises a torque transmission assembly, wherein the torque transmission assembly comprises a movable ring which is sleeved on a driving shaft and translates along the axial direction of the driving shaft, one end surface of the movable ring is pressed by an elastic assembly, and the other end surface presses a first steel ball in a groove of a torque receiving assembly; the movable ring is also provided with a clamping part, the driving shaft is also provided with a limiting part capable of moving along the radial direction of the driving shaft, the limiting part is positioned on the translation path of the clamping part, and the limiting part acts to clamp the clamping part when the movable ring compresses the elastic assembly until the first steel ball is separated from the groove; the utility model discloses a set up joint portion on the loose ring to set up spacing portion on the driving shaft, can avoid first steel ball to get into repeatedly under the effect of elastic component, load-deviate from the recess, thereby avoid the part wearing and tearing and because the spark that the part wearing and tearing impacted production, the condition such as burning lubricating grease smoking appears.

Description

Full disconnect-type torque limiter

Technical Field

The utility model relates to a torque transmission equipment technical field especially relates to a full disconnect-type torque limiter.

Background

The torque limiter is mainly used for transmitting torque, is often arranged between a driving shaft and a driven shaft, and limits the torque transmitted by a transmission system in a slip mode when the torque of the driven shaft exceeds a set value of required torque due to overload or failure of a load connected with the driven shaft, specifically, the driving shaft idles, and the driven shaft stops rotating, so that the function of overload protection is achieved.

At present, the existing torque limiter on the market is a steel ball type torque limiter, when the torque exceeds a set value of required torque due to overload or load failure, the torque limiter actively cuts off the torque transmission between a driving shaft and a driven shaft, and when the overload condition disappears, the driving shaft and the driven shaft can be automatically restored or manually restored to be connected, so that the load continues to work. However, in the use process of the conventional torque limiter, when the load torque exceeds a set value, the torque limiter can continuously operate in a working-disconnecting-working-disconnecting state, so that the steel balls continuously impact the thrust base and the sliding base, parts are seriously abraded, the working efficiency of the torque limiter is reduced, and the service life of the torque limiter is shortened. Meanwhile, if the torque limiter is in an overload environment for a long time, the temperature of parts can be rapidly increased in the abrasion process, and the conditions of generating smoke due to combustion of lubricating grease, generating sparks and the like can be generated, so that the torque limiter cannot be applied to the environment of flammable gas, such as the technical scheme disclosed in the invention patent with the application number of '201510081975.6' and the name of 'torque limiter'.

In order to solve the technical problem, in the invention patent with the application number of 200610147970.X named as a torque limiter, at least one side of a limiting seat is provided with a safety groove which can contain the whole ball, and the ball used for transmitting the torque between a pressure plate and a hub is arranged between an upper limiting seat and a lower limiting seat. When the transmission torque between the pressing plate and the hub exceeds the separation torque, the ball leaves the limiting seat, falls into the safety groove on one side of the lower limiting seat and is not contacted with the upper limiting seat any more. Firstly, more safety grooves are required to be formed in the limiting seat, so that the arrangement quantity of the ball bearing accommodating grooves is reduced, and the torque transmission capacity is reduced; moreover, the ball is difficult to reset after entering the safety groove.

Therefore, it is important to develop a new torque limiter.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a full disconnect-type torque limiter to solve the problem that prior art exists, when the load exceeded the setting value, can realize that torque limiter idles completely, avoid the part wearing and tearing to reach because the spark that the part wearing and tearing impacted production, the condition such as burning lubricating grease smoking appears.

In order to achieve the above purpose, the utility model provides a following scheme: the utility model provides a full-separation type torque limiter, which comprises a torque transmission assembly, wherein the torque transmission assembly comprises a movable ring which is sleeved on a driving shaft and translates along the axial direction of the driving shaft, one end surface of the movable ring is pressed by an elastic assembly, and the other end surface presses a first steel ball in a groove of a torque receiving assembly; still be provided with joint portion on the loose ring, still be provided with on the driving shaft and follow the spacing portion of driving shaft radial movement, spacing position in the translation route of joint portion, the loose ring compression elastic component extremely when first steel ball deviates from the recess, spacing portion produces the action will joint portion blocks.

Preferably, the elastic assembly comprises an elastic piece and a compression ring, one end of the elastic piece is fixed, the other end of the elastic piece is connected to one end of the compression ring, and the bottom of the other end face of the compression ring is provided with a first inclined plane which is inclined downwards along the rebound direction of the elastic piece; the joint portion is including setting up on its interior anchor ring along the annular bulge of radial inward protrusion, the annular bulge is including forming second inclined plane and the third inclined plane of its protruding shape, the third inclined plane is towards first inclined plane setting, spacing portion is including setting up the annular bulge with second steel ball between the driving shaft outer wall and fixed spacing boss, the diameter of second steel ball is not more than the bellied most advanced position of annular with distance between the driving shaft wall first inclined plane with spacing boss is located respectively the second steel ball both sides, during the transmission moment of torsion, the second steel ball is located first inclined plane the third inclined plane with between the spacing boss, when first steel ball breaks away from the moment of torsion receiving assembly, the second steel ball is located first inclined plane the second inclined plane with between the spacing boss.

Preferably, the length of the third inclined plane in the axial direction is smaller than the axial length of the first steel ball sunk into the groove; and the distance between the two opposite end faces of the compression ring and the movable ring is greater than the axial length of the first steel ball sunk into the groove.

Preferably, an inclination angle of the second slope with respect to the driving shaft outer wall surface is smaller than that of the third slope.

Preferably, the movable ring is further provided with an anti-disengagement portion for preventing the second steel ball from disengaging from a gap between the movable ring and the compression ring.

Preferably, the torque receiving assembly is located on one side of the movable ring, a plurality of annularly arranged grooves are formed in the surface of one side, facing the movable ring, of the torque receiving assembly, and the first steel balls are arranged between the grooves and the movable ring.

Preferably, the torque receiving assembly comprises a connecting flange which is sleeved on the driving shaft through a bearing, and a plurality of grooves are formed in the surface of the connecting flange.

Preferably, an annular accommodating part is arranged on the driving shaft, a plurality of cylindrical through holes used for accommodating the first steel balls are arranged on the annular accommodating part along the circumferential direction, the central axis of each cylindrical through hole is parallel to the axis of the driving shaft, and the movable ring is sleeved on the annular outer edge of the annular accommodating part.

Preferably, the driving shaft is further connected with a nut through threads, one end of the elastic element abuts against the compression ring, and the other end of the elastic element abuts against the nut.

Preferably, the elastic member includes a plurality of disc springs arranged in a stacked manner.

The utility model discloses for prior art gain following technological effect:

1. the utility model can avoid the first steel ball from repeatedly entering and falling out of the groove under the action of the elastic component and the load by arranging the clamping part on the movable ring and arranging the limiting part on the driving shaft, thereby avoiding the conditions of part abrasion, spark generated by part abrasion impact, smoke generated by burning lubricating grease and the like;

2. the torque limiter in the utility model has simple structure and is more convenient for resetting;

3. the utility model discloses still have the nut through threaded connection on the well driving shaft, the one end butt of elastic component is on the clamp ring, and other end butt can adjust the initial pressure of elastic component to the clamp ring, torque limiter's moment of torsion transmission setting value promptly through changing the nut position on the driving shaft on the nut.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic view of a matching structure of a torque limiter and a connecting flange in a transmission torque state;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic view of a matching structure of the torque limiter and the connecting flange of the present invention when the load exceeds the predetermined value and is disengaged;

FIG. 4 is an enlarged view of a portion of FIG. 3;

wherein, 1, a driving shaft; 2. a movable ring; 3. a first steel ball; 4. a groove; 5. a compression ring; 6. a first inclined plane; 7. an annular projection; 8. a second inclined plane; 9. a third inclined plane; 10. a limiting boss; 11. a second steel ball; 12. a drop-out prevention section; 13. a connecting flange; 14. an annular accommodating portion; 15. a cylindrical through hole; 16. a nut; 17. a disc spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

The embodiment provides a full-separation type torque limiter which comprises a torque transmission assembly, wherein the torque transmission assembly comprises a movable ring 2 which is sleeved on a driving shaft 1 and translates along the axial direction of the driving shaft 1, one end face of the movable ring 2 is pressed by an elastic assembly, and the other end face presses a first steel ball 3 in a groove 4 of a torque receiving assembly; still be provided with joint portion on the loose ring 2, still be provided with the spacing portion that can follow 1 radial movement of driving shaft on the driving shaft 1, spacing portion is located the translation route of joint portion, and when loose ring 2 compression elastic component 3 deviate from recess 4 to first steel ball, spacing portion produced the action and blocks joint portion.

When the torque is normally transmitted, the movable ring 2 presses the first steel ball 3 in the groove 4 on the surface of the torque receiving component under the action of the elastic force of the elastic component, and when the driving shaft 1 drives the movable ring 2 to rotate, the torque is transmitted to the torque receiving component by using the first steel ball 3; when the load torque is too large, the first steel ball 3 is separated from the groove 4 of the torque receiving assembly, the movable ring 2 is extruded to move axially along the driving shaft 1, the elastic assembly is compressed, when the first steel ball 3 passes through the limiting part in the axial movement process of the movable ring 2, the limiting part acts to clamp the clamping part, the movable ring 2 cannot reset under the action of the elastic assembly, the first steel ball 3 cannot be pressed into the groove 4, and the torque limiter completely idles; from this, this embodiment is through setting up joint portion on loose ring 2 to set up spacing portion on driving shaft 1, can avoid first steel ball 3 to get into repeatedly under the effect of elastic component, load-deviate from recess 4, thereby avoid the part wearing and tearing and strike the spark that produces because the part wearing and tearing, the condition such as burning lubricating grease smoking appears.

Specifically, in this embodiment, the elastic component includes an elastic element and a clamp ring 5, one end of the elastic element is fixed, the other end of the elastic element is connected to one end of the clamp ring 5, a first inclined plane 6 inclining downwards along the rebound direction of the elastic element is arranged at the bottom of the other end face of the clamp ring 5, and the lower surface of the tip of the first inclined plane 6 is flush with the inner annular face of the clamp ring 5; the clamping part comprises an annular bulge 7 which is arranged on the inner ring surface of the clamping part and protrudes inwards along the radial direction, the annular bulge 7 comprises a second inclined surface 8 and a third inclined surface 9 which form the bulge shape, the third inclined surface 9 is arranged towards the first inclined surface 6, the limiting part comprises a second steel ball 11 and a limiting boss 10 which are arranged between the annular bulge 7 and the outer wall surface of the driving shaft 1, the diameter of the second steel ball 11 is not more than the distance between the tip position of the annular bulge 7 and the wall surface of the driving shaft 1, the first inclined surface 6 and the limiting boss 10 are respectively positioned at two sides of the second steel ball 11, when the torque is transmitted, under the action of an elastic part, the compression ring 5 compresses the second steel ball 11 on the third inclined surface 9 of the annular bulge 7 through the first inclined surface 6, the limiting boss 10 axially limits the second steel ball 11, so that the second steel ball 11 is clamped through three planes, the second steel ball 11 is prevented from shaking, and the movable ring 2 is extruded through the second steel ball 11, so that the first steel ball 3 is positioned in the groove 4 to transmit the torque; when overload occurs, the first steel ball 3 is separated from the groove 4 and extrudes the movable ring 2, the movable ring 2 extrudes the second steel ball 11 backwards (with one end of the torque receiving assembly at the position shown in the figure as front) through the third inclined plane 9, meanwhile, the compression ring 5 backwards moves, the elastic piece is further compressed, because the limiting boss 10 is fixed, when the second steel ball 11 backwards moves, the limiting function of the limiting boss 10 is lost, under the extrusion effect of the third inclined plane 9 and the first inclined plane 6 and the gravity action of the second steel ball 11, the second steel ball 11 downwards slides along the first inclined plane 6 and the third inclined plane 9, when the second steel ball slides to the bottom of the third inclined plane 9, the second steel ball 11 loses the limiting function of the third inclined plane 9, forwards moves under the action of the compression ring 5 and is blocked by the limiting boss 10, and upwards moves to the position of the second inclined plane 8 under the action of the first inclined plane 6, the tip of the annular boss 7 is clamped by the first inclined plane 6, the tip of the annular boss 7 is positioned in the idle rotation of the second steel ball, and can not be clamped in the groove 4 again, and the elastic piece can not be reset under the action of the elastic piece, so that the elastic piece can not return to the second steel ball 3; when the torque limiter needs to be reset, the compression ring 5 is moved backwards, the second steel ball 11 is moved to the rear of the tip end of the annular bulge 7, and then the compression ring 5 is loosened, so that the resetting process is more convenient.

In order to ensure that the first steel ball 3 can be separated from the groove 4, in this embodiment, the distance between the two opposite end faces of the pressing ring 5 and the movable ring 2 is greater than the axial length of the first steel ball 3 sunk into the groove 4, and in order to ensure that the first steel ball 3 can be completely separated from the groove 4, the tip of the annular protrusion 7 clamps the second steel ball 11, in this embodiment, the length of the third inclined surface 9 in the axial direction is less than the size of the first steel ball 3 sunk into the groove 4, when the first steel ball 3 is clamped, the first steel ball 3 cannot be sunk into the groove 4 again, and a specific size setting technician in the art can design according to actual conditions, and therefore, the embodiment is not described in detail.

Furthermore, in the embodiment, the inclination angle of the second inclined surface 8 relative to the outer wall surface of the driving shaft 1 is smaller than that of the third inclined surface 9, the third inclined surface 9 is relatively flat and gentle, which is beneficial for the second steel ball 11 to move downwards and backwards during resetting, and the inclination of the third inclined surface 9 is slightly larger, so that the torque limiter can transmit larger torque; the specific inclination angle can be designed by those skilled in the art according to actual situations.

In order to prevent the second steel ball 11 from slipping out of the first inclined surface 6 and the third inclined surface 9 during the torque transmission process, the movable ring 2 in this embodiment is further provided with an anti-slip part 12 for preventing the second steel ball 11 from slipping out of the gap between the movable ring 2 and the compression ring 5.

Further, the moment of torsion receiving assembly is located one side of activity ring 2 in this embodiment, include to establish flange 13 on driving shaft 1 through the bearing housing, and flange 13 is provided with a plurality of recesses 4 on the surface, has first steel ball 3 between recess 4 and the activity ring 2.

Further, be provided with annular accommodation portion 14 on driving shaft 1 in this embodiment, be provided with a plurality of cylindrical through-holes 15 that are used for holding first steel ball 3 along circumference on the annular accommodation portion 14, the axis of cylindrical through-hole 15 is parallel with driving shaft 1's axis, activity ring 2 cup joints on annular accommodation portion 14's annular outer fringe to can guarantee that activity ring 2 can carry out the translation along driving shaft 1's axial, can also act on first steel ball 3 simultaneously.

Furthermore, in the embodiment, the driving shaft 1 is further connected with a nut 16 through a thread, one end of the elastic element abuts against the compression ring 5, and the other end of the elastic element abuts against the nut 16, so that the initial pressure of the elastic element on the compression ring 5 can be changed by adjusting the position of the nut 16 on the driving shaft 1, and the torque transmission capacity, namely the torque transmission set value of the torque limiter, can be adjusted; preferably, the elastic member in this embodiment comprises a plurality of disc springs 17 arranged in a stacked manner.

The adaptability that carries out according to actual demand all is in the protection scope of the utility model.

It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A full-separation type torque limiter is characterized by comprising a torque transmission assembly, wherein the torque transmission assembly comprises a movable ring which is sleeved on a driving shaft and translates along the axial direction of the driving shaft, one end face of the movable ring is pressed by an elastic assembly, and the other end face presses a first steel ball in a groove of a torque receiving assembly; still be provided with joint portion on the loose ring, still be provided with on the driving shaft and follow the spacing portion of driving shaft radial movement, spacing position in the translation route of joint portion, the loose ring compression elastic component extremely when first steel ball deviates from the recess, spacing portion produces the action will joint portion blocks.

2. The full-separation type torque limiter according to claim 1, wherein the elastic assembly comprises an elastic piece and a compression ring, one end of the elastic piece is fixed, the other end of the elastic piece is connected with one end of the compression ring, and the bottom of the other end face of the compression ring is provided with a first inclined surface which is inclined downwards along the rebound direction of the elastic piece; the joint portion is including setting up on its interior anchor ring along the annular bulge of radial inward protrusion, the annular bulge is including forming second inclined plane and the third inclined plane of its protruding shape, the third inclined plane is towards first inclined plane setting, spacing portion is including setting up the annular bulge with second steel ball between the driving shaft outer wall and fixed spacing boss, the diameter of second steel ball is not more than the bellied most advanced position of annular with distance between the driving shaft wall first inclined plane with spacing boss is located respectively the second steel ball both sides, during the transmission moment of torsion, the second steel ball is located first inclined plane the third inclined plane with between the spacing boss, when first steel ball breaks away from the moment of torsion receiving assembly, the second steel ball is located first inclined plane the second inclined plane with between the spacing boss.

3. The full breakaway torque limiter of claim 2, wherein a length of the third ramp in an axial direction is less than an axial length of the first steel ball recessed into the groove, and a distance between opposing end faces of the compression ring and the movable ring is greater than the axial length of the first steel ball recessed into the groove.

4. The fully-disengaged torque limiter according to claim 3, wherein the second ramp has a smaller inclination angle with respect to the outer wall surface of the drive shaft than the third ramp.

5. The full-separation type torque limiter according to claim 4, wherein the movable ring is further provided with an anti-separation portion for preventing the second steel ball from separating from a gap between the movable ring and the compression ring.

6. The total breakaway torque limiter of claim 5 wherein the torque receiving assembly is located on one side of the movable ring and has an annular array of grooves on a surface of the torque receiving assembly on a side facing the movable ring, the grooves and the movable ring having the first steel ball therebetween.

7. The full-separation type torque limiter according to claim 6, wherein the torque receiving assembly comprises a connecting flange sleeved on the driving shaft through a bearing, and a plurality of grooves are arranged on the surface of the connecting flange.

8. The full-separation type torque limiter according to any one of claims 2 to 7, wherein an annular accommodating portion is arranged on the driving shaft, a plurality of cylindrical through holes for accommodating the first steel balls are circumferentially arranged on the annular accommodating portion, the central axis of each cylindrical through hole is parallel to the axis of the driving shaft, and the movable ring is sleeved on the annular outer edge of the annular accommodating portion.

9. The full-separation type torque limiter according to claim 8, wherein a nut is further connected to the driving shaft through threads, one end of the elastic member abuts against the compression ring, and the other end of the elastic member abuts against the nut.

10. The fully breakaway torque limiter of claim 9, wherein the resilient member comprises a plurality of disc springs arranged in a stack.