CN111895003A

CN111895003A - Friction-proof device of torque limiter

Info

Publication number: CN111895003A
Application number: CN202010646723.4A
Authority: CN
Inventors: 王永涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2020-11-06

Abstract

The invention relates to the technical field of mechanical equipment and discloses an anti-friction device of a torque limiter. When the transmission mechanism is overloaded, the spring is compressed under the action of the balls, so that the driving disc is separated from the driven disc, and at the moment, the driving disc still rotates continuously, the stop block extends outwards under the action of centrifugal force, the stop block moves to the groove on one side of the driving disc, one side of the balls is in contact with one end of the stop block, and the balls are stopped from resetting when the driving disc rotates continuously, so that the collision between the balls and the driving disc is converted into rolling friction of the balls on the driving disc and the stop block, the problem that the balls collide with the driving disc and are lost when the traditional ball type torque limiter is overloaded is solved, the loss of the balls and the driving disc is reduced, and the service life of equipment is ensured.

Description

Friction-proof device of torque limiter

Technical Field

The invention relates to the technical field of mechanical equipment, in particular to an anti-friction device of a torque limiter.

Background

The torque limiter is also called a safety coupling, is a part for connecting a driving machine and a working machine, protects a driving part or a driven part in a transmission system, has the main function of overload protection, can be divided into a plurality of styles such as a ball type, a friction type, a hydraulic type, a magnetic powder type and the like according to the working principle, is mainly used for agriculture and forestry machinery, machine tool equipment, electronic equipment industries and the like, and can limit the torque transmitted by the transmission system in a slipping mode when the required torque exceeds a set value due to overload or mechanical failure so as to prevent the damage of the machinery or a transmission shaft.

Traditional ball formula torque limiter is at normal during operation, the ball is on average inlayed in the recess that driven plate and driving disc opposition formed, and when transshipping takes place, under the effect of spring, ball roll-off recess, make driving disc and driven disc separation, reach the effect of protection driving shaft or driven shaft, and because the ball automatic re-setting under the effect of spring, when leading to transshipping still to exist, the ball just can follow the roll-off in the recess many times under the effect of overload resistance, and at the in-process of ball roll-off recess, because the driving disc can collide with the ball, lead to ball and driving disc all can wear and tear, the life of torque limiter has been reduced, and can influence torque limiter's transmission effect, make and often adjust torque limiter.

Disclosure of Invention

Aiming at the defects of the prior torque limiter in the use process in the background technology, the invention provides the anti-friction device of the torque limiter, which has the advantages of reducing friction and being convenient to maintain and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides an antifriction device of torque limiter, includes the casing, the initiative dish has been cup jointed in the one end activity of casing inner chamber, the driven plate has been cup jointed in the other end activity of casing inner chamber, first spring has been cup jointed in the one end activity of driven plate surface, the other end fixedly connected with of first spring is located the movable block of driven plate surface one end, the ball has been placed in holding the chamber between movable block and the initiative dish, the initiative dish has been close to the one end of driven plate and has been seted up movable chamber, the top activity of activity chamber inner chamber has been cup jointed the dog, and the surface and the initiative dish one end of dog one end are in the coplanar, the bottom surface fixedly connected with second spring of dog, the other end fixedly connected with fixed block of second spring.

Preferably, the inner cavity of the fixed block is movably connected with a fixing bolt, and the fixing bolt penetrates through the inner cavity of the fixed block and extends to the inner cavity of the driving disc.

Preferably, the number of the movable cavities is the same as that of the balls, and a stop block, a second spring and a fixed block are uniformly arranged in an inner cavity of each movable cavity.

The invention has the following beneficial effects:

1. when the transmission mechanism is overloaded, the spring is compressed under the action of the balls, so that the driving disc is separated from the driven disc, and at the moment, the driving disc still rotates continuously, the stop block extends outwards under the action of centrifugal force, the stop block moves to the groove on one side of the driving disc, one side of the balls is in contact with one end of the stop block, and the balls are stopped from resetting when the driving disc rotates continuously, so that the collision between the balls and the driving disc is converted into rolling friction of the balls on the driving disc and the stop block, the problem that the balls collide with the driving disc and are lost when the traditional ball type torque limiter is overloaded is solved, the loss of the balls and the driving disc is reduced, and the service life of equipment is ensured.

2. According to the invention, each stop block is arranged to be an independent body, so that when the ball is rubbed with the stop block to cause one end of the stop block to be abraded, the damaged stop block can be independently replaced through the fixing bolt each time the torque limiter is maintained, the problem that the driving disc needs to be integrally replaced after the traditional torque limiter is damaged is solved, the maintenance cost of the torque limiter is reduced, and the maintenance efficiency of the torque limiter is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the driving plate of the present invention;

FIG. 3 is a schematic diagram illustrating the normal operation of the present invention;

FIG. 4 is a schematic view of the structural anti-friction state of the present invention;

FIG. 5 is an enlarged view of the point A in FIG. 3 according to the present invention.

In the figure: 1. a housing; 2. a driving disk; 3. a driven plate; 4. a first spring; 5. a movable block; 6. a ball bearing; 7. a movable cavity; 8. a stopper; 9. a second spring; 10. a fixed block; 11. and (5) fixing the bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, an anti-friction device of a torque limiter comprises a housing 1, a driving disc 2 is movably sleeved at one end of an inner cavity of the housing 1, a driven disc 3 is movably sleeved at the other end of the inner cavity of the housing 1, a first spring 4 is movably sleeved at one end of an outer surface of the driven disc 3, a movable block 5 positioned at one end of the outer surface of the driven disc 3 is fixedly connected to the other end of the first spring 4, a ball 6 is placed in a cavity between the movable block 5 and the driving disc 2, a movable cavity 7 is formed at one end of the driving disc 2 close to the driven disc 3, a stop block 8 is movably sleeved above the inner cavity of the movable cavity 7, the surface of one end of the stop block 8 and one end of the driving disc 2 are positioned on the same plane, a second spring 9 is fixedly connected to the bottom surface of the stop block 8, and a fixed block 10 is fixedly connected to the other end of the second spring 9, so, dog 8 just stretches out from activity chamber 7 under the effect of centrifugal force, make when transshipping when lasting, ball 6 can not reset to the recess of initiative dish 2 under first spring 4's effect, only can with the surface contact of dog 8 and initiative dish 2 one end, and produce rolling friction, avoid initiative dish 2 and ball 6 collision, make the impaired condition of initiative dish 2 and ball produce, when driving shaft stall, because initiative dish 2 stall, make the centrifugal force that lets dog 8 stretch out disappear, dog 8 just automatic re-sets to activity intracavity 7 under the effect of second spring 9.

Wherein, the inner chamber swing joint of fixed block 10 has fixing bolt 11, and fixing bolt 11 runs through the inner chamber of fixed block 10 and extends to the inner chamber of initiative dish 2 for can dismantle fixed block 10 through fixing bolt 11, make the dog 8 that wearing and tearing are comparatively serious can be changed.

Wherein, the quantity in activity chamber 7 is the same with the quantity of ball 6, and the even dog 8 of an inner chamber of every activity chamber 7, second spring 9 and fixed block 10 for it is comparatively serious to wear and tear as dog 8, when needing to be changed, only needs to change this dog 8, need not to change drive disk 2 wholly, has saved torque limiter's maintenance cost.

The using method of the invention is as follows:

when the normal work is carried out: the driving disc 2 is in transmission connection with a driving shaft, the driven disc 3 is in transmission connection with a driven shaft, then the driving disc 2 rotates, and the driven shaft and the driving shaft synchronously rotate through a torque limiter;

when overload occurs: when overload occurs, the rotating speeds of the driving shaft and the driven shaft are changed, so that the rotating speeds of the driving disc 2 and the driven disc 3 are different, the balls 6 slide out of the grooves formed by the opposite of the driven disc 3 and the driving disc 2 under the action of overload resistance, the movable block 5 is driven by the balls 6 to move towards one end of the driven disc 3, the grooves of the driving disc 2 are cavities, the stop blocks 8 extend outwards under the action of centrifugal force generated when the driving disc 2 rotates, the stop blocks 8 move to the grooves of the driving disc 2, when the driving disc 2 rotates until the balls 6 are opposite to the grooves of the driving disc 2, the balls 6 are driven by the movable blocks 5 to reset under the action of the first springs 4, at the moment, the grooves of the driving disc 2 are filled by the stop blocks 8, the balls 6 cannot reset into the grooves of the driving disc 2, the balls 6 are in contact with the stop blocks 8, and one end of the stop blocks 8 is positioned on the same plane with one end of the driving disc 2, so that the rolling balls 6 generate rolling friction on the surface of the stop block 8 and the driving disc 2;

during overload adjustment: after overload occurs, adjustment is needed, after the adjustment of the driving piece and the driven piece is completed, the driving shaft stops rotating, the driving disc 2 of the torque limiter stops rotating, the stop block 8 automatically pulls the stop block 8 back into the movable cavity 7 due to the fact that centrifugal force is lost, the ball 6 moves back into a groove formed by the driving disc 2 and the driven disc 3 in an opposite mode under the action of the first spring 4, and then the machine can be started again;

when the stop 8 is worn: when the abrasion of the stop block 8 is serious due to repeated overload, the torque limiter is maintained, the fixing block 10 at the bottom of the stop block 8 which is seriously damaged is detached through the fixing bolt 11, the fixing block 10, the second spring 9 on the fixing block 10 and the stop block 8 are replaced by intact parts, and the torque limiter can normally work again.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An anti-friction device of a torque limiter, comprising a casing (1), characterized in that: a driving disc (2) is movably sleeved at one end of the inner cavity of the shell (1), a driven disc (3) is movably sleeved at the other end of the inner cavity of the shell (1), one end of the outer surface of the driven disc (3) is movably sleeved with a first spring (4), the other end of the first spring (4) is fixedly connected with a movable block (5) positioned at one end of the outer surface of the driven disc (3), a ball (6) is arranged in a cavity between the movable block (5) and the driving disc (2), one end of the driving disc (2) close to the driven disc (3) is provided with a movable cavity (7), a stop block (8) is movably sleeved above the inner cavity of the movable cavity (7), and the surface of one end of the stop block (8) and one end of the driving disc (2) are positioned on the same plane, the bottom surface of the stop block (8) is fixedly connected with a second spring (9), and the other end of the second spring (9) is fixedly connected with a fixing block (10).

2. The anti-friction device of a torque limiter according to claim 1, wherein: the inner cavity swing joint of fixed block (10) has fixing bolt (11), fixing bolt (11) run through the inner cavity of fixed block (10) and extend to the inner cavity of initiative dish (2).

3. The anti-friction device of a torque limiter according to claim 1, wherein: the number of the movable cavities (7) is the same as that of the balls (6), and a stop block (8), a second spring (9) and a fixed block (10) are uniformly distributed in the inner cavity of each movable cavity (7).