CN201407295Y

CN201407295Y - Structure used for torque restriction

Info

Publication number: CN201407295Y
Application number: CN2009200860712U
Authority: CN
Inventors: 余晓锁
Original assignee: WUHAN ZHENGTONG TRANSMISSION TECHNOLOGY Co Ltd
Current assignee: WUHAN ZHENGTONG TRANSMISSION TECHNOLOGY Co Ltd
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2010-02-17
Anticipated expiration: 2019-05-27

Abstract

A structure used for torque restriction comprises an external disc (1) with an internal conical surface, and an internal disc (4) that matches with the external disc (1) and is provided with an external conical surface, wherein one end of the internal disc (4) is provided with a spring trough (15); the spring trough (15) is a ring-shaped structure; a spring (5) is arranged in the spring trough (15); a pressing plate ring (6) is arranged at the external side of the spring trough (15); and an internal core shaft (12) passes through the centers of the external disc (1), the internal disc (4) andthe pressing plate ring (6). The structure overcomes the defects that the existing structure for torque restriction transmits small torque, has large abrasion and is difficult to be fabricated and installed. The structure can be combined with various traditional couplers to form various overload protection forms with torque restriction, and can be widely applied to various mechanical equipments.

Description

The structure that is used for torque limited

Technical field

The utility model relates to a kind of structure that is used for torque limited, and it is applicable to the torque limited in all kinds of machine power transmissions, promptly usually said overload protection function.

Background technique

Load during existing machine works, though did calculating or estimation when design, real-world operation often has some beyond thought situations, as accidental impact, misoperations etc. increase severely actual load, damage actuating unit or other important component probably.Damage for the overload that prevents machine, the torque limited structure is set in the machine power transmission, to carry out the application of overload protection in modern machinery and equipment with more and more extensive.

The effect of torque limited is exactly when load is excessive, can cut off automatically or the limit load value.If the driving component (as belt transmission, friction wheel transmission, friction disk type safety coupling etc.) of existing friction pair in the Transmitted chains, then this friction pair just can play the torque limited effect.Otherwise just the overload protective gear should be set.

That torque limiting apparatus commonly used can divide that transmission component can damage and two kinds of can not damage.The former is as pin safety coupling (during overload pin fracture) etc.; Not torque limiting apparatus that can damage such as steel ball type torque limited safety coupling, friction disk type safety coupling (rubbing surface skids during overload) etc.The torque limiting apparatus that can damage does not make the moment of torsion of transmission limited because structure and friction material are asbestos material, and resets after skidding when transshipping moment of torsion, because the recessed injustice in hole on asbestos abrasives surface, and can't guarantee precision; Owing to complex structure, transmitting torque is little especially for steel ball type torque limited coupling, the cost height, and limited application.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned existing disadvantages of background technology part, and a kind of structure that is used for torque limited is provided.It can transmit very big moment, and it is little to wear and tear, and operates steadily, and fabrication and installation are easy.

The purpose of this utility model reaches by following measure: the structure that is used for torque limited, it is characterized in that it comprises the outer dish of being with internal conical surface, inner disc with the band outer conical surface that is complementary with outer dish, one end of inner disc has spring groove, spring groove is structure ringwise, there is spring to be positioned at spring groove, there is the pressing plate ring to be positioned at the outside of spring groove, there is inner spindle to pass outer dish, the center of inner disc and pressing plate ring, one end of inner spindle is fixed on the outer dish by positioning means, there is regulating mechanism in the outside of pressing plate ring, described regulating mechanism is threaded with inner spindle, the endoporus of inner spindle and inner disc is slidingly connected, on the described outer dish connecting pore is arranged, on the outer dish periphery is arranged, the endoporus that is connected with load end is arranged on the inner spindle.

In technique scheme, described positioning means comprises lock washer, is positioned at the nut and the plane bearing at lock washer two ends, and plane bearing is sleeved on the inner spindle, one end of plane bearing contacts with lock washer, the other end of plane bearing and the central recess plane contact of coiling outward.

In technique scheme, described spring groove is made up of water jacket and inside groove, and inside groove encloses circular hole for centering on interior disk center splined hole equally distributed, and is positioned at the neutral position of water jacket, and described pressing plate ring is positioned at water jacket.

In technique scheme, on the outer conical surface of described inner disc oil groove is arranged.

In technique scheme, between described inner disc and the outer dish adjusting play is arranged.

In technique scheme, described regulating mechanism comprises adjustment nut and the outer nut of adjusting that is positioned at the pressing plate ring outside, adjust nut the pressing plate ring and outside adjust between the nut.

In technique scheme, described inner spindle is a three stage structure, comprise positioning section, glissile segment and adjustment section, described glissile segment is between positioning section and adjustment section, on the glissile segment of inner spindle external splines is arranged, there is internal spline at the center of inner disc, forms spline pair between external splines and the internal spline and is slidingly connected.

In technique scheme, between described pressing plate ring and the adjustment nut steel ball is arranged, steel ball is positioned at the arc groove on pressing plate ring and the adjustment nut.

In technique scheme, described adjustment nut and outer the adjustment on the nut have the adjustment hole.

In technique scheme, the diameter of the adjustment section on the described inner spindle is greater than the diameter of glissile segment, and the diameter of glissile segment is greater than the diameter of positioning section.

The structure that the utility model is used for torque limited has following advantage: 1.. and volume can be done greatly, can transmitting large torque.2.. simple in structure, it is easy to adjust moment.3.. regulate moment by spring, adjusting moment is even.4.. be slidingly connected by spline pair, initiatively, driven disengagement is quick on the draw during overload, and is quick.In case overload disappears, and can recover proper functioning immediately.5.. the utility model structure can be worked down less than 350 ℃ at high temperature, and the operating temperature of friction chip can not surpass more than 100 ℃.6.. the utility model structure can make up with traditional all kinds of coupling, forms the overload protection form of various band torque limited, is useful on all kinds of machinery widely.

Description of drawings

Fig. 1 is a structure sectional view of the present utility model.

Fig. 2 is that the A of inner disc in the utility model is to schematic representation

Fig. 3 is the A-A sectional view of Fig. 2

Fig. 4 is the structural representation (containing broken section) of inner spindle in the utility model.

The structure sectional view that Fig. 5 coils at home and abroad for the utility model.

Fig. 6 is a kind of equivalent structure of inner spindle in the utility model.

Fig. 7 is embodiment 1 of the present utility model (an elastic sleeve pin torque limited coupling).

Fig. 8 is embodiment 2 of the present utility model (the elastic sleeve pin torque limited coupling of band brake wheel).

Fig. 9 is embodiment 3 (the elastic sleeve pin torque limited coupling of band brake dish) of the present utility model.

Figure 10 is embodiment 4 (the metal diaphragm coupling of band torque limited) of the present utility model.

Figure 11 is embodiment 5 (the elasticity star coupling of band torque limited) of the present utility model.

Figure 12 is embodiment 6 of the present utility model (Falk flexible coupling of band torque limited).

Figure 13 is embodiment 7 (the duplex chain formula coupling of band torque limited) of the present utility model.

Figure 14 is embodiment 8 of the present utility model (drum-shaped tooth type shaft coupling of band torque limited).

Figure 15 is embodiment 9 of the present utility model (rigid coupling of band torque limited).

Embodiment

Describe performance of the present utility model in detail below in conjunction with accompanying drawing, but they do not constitute to qualification of the present utility model, only do for example.Simultaneously by illustrating that advantage of the present utility model will become clear more and understanding easily.

Consult accompanying drawing as can be known: the structure that is used for torque limited, it is characterized in that it comprises the outer dish 1 of being with internal conical surface, inner disc 4 with the band outer conical surface that is complementary with outer dish 1, one end of inner disc 4 has spring groove 15, spring groove 15 is structure ringwise, there is spring 5 to be positioned at spring groove 15, there is pressing plate ring 6 to be positioned at the outside of spring groove 15, there is inner spindle 12 to pass outer dish 1, the center of inner disc 4 and pressing plate ring 6, one end of inner spindle 12 is fixed on the outer dish 1 by positioning means, there is regulating mechanism in the outside of pressing plate ring 6, described regulating mechanism is threaded with inner spindle 12, inner spindle 12 is slidingly connected by spline pair with the endoporus of inner disc 4, on the described outer dish 1 connecting pore 22 (comprising screw or through hole) is arranged, on the outer dish 1 periphery 23 is arranged, the endoporus 11 (endoporus 11 also can be connected replacement by spindle nose or the flange that adopts no endoporus with load end) that is connected with load end is arranged, as Fig. 1 on the inner spindle 12, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5.

Positioning means comprises lock washer 21, be positioned at the nut 20 and the plane bearing 19 at lock washer 21 two ends, plane bearing 19 is sleeved on the inner spindle 12, and an end of plane bearing 19 contacts with adjusting packing ring 21, the other end of plane bearing 19 and outer central recess 13 plane contact of coiling on 1.This positioning means is simple in structure, go slick.After inner disc and outer dish are thrown off, but smooth operation, and the axially locating function (as shown in Figure 1) of realization regulating mechanism and slide mechanism.

Spring groove 15 is made up of water jacket 151 and inside groove 152, and inside groove 152 encloses circular hole for centering on inner disc 4 center splined holes equally distributed, and is positioned at the neutral position of water jacket 151, and described pressing plate ring 6 is positioned at water jacket 151, positioning stablity.Spring moves axially to inner disc water jacket 151 under the effect of pressing plate ring 6, and motion is (as shown in Figure 3) steadily.

Oil groove 3 is arranged on the outer conical surface of inner disc 4.When inner disc 4 is thrown off with outer dish 1, oily under action of centrifugal force, the Castor Oil conical surface (as shown in Figure 1).

Inner disc 4 and coil 1 outward between adjusting play 2 (as shown in Figure 1) is arranged.Different moment sizes can be adjusted, and after conical surface wearing and tearing, this structure can be continued to utilize through repairing the conical surface.

Regulating mechanism comprises adjustment nut 16 and the outer nut 8 of adjusting that is positioned at pressing plate ring 6 outsides, adjust nut 16 pressing plate ring 6 and outside adjust between the nut 8.Between pressing plate ring 6 and the adjustment nut 16 steel ball 7 is arranged, steel ball 7 is positioned at the arc groove on pressing plate ring 6 and the adjustment nut 16.Compress stressed evenly (as shown in Figure 1) by steel ball 7.

Inner spindle 12 is a three stage structure, comprise positioning section 121, glissile segment 122 and adjust section 123, described glissile segment 122 is between positioning section 121 and adjustment section 123, on the glissile segment 122 of inner spindle 12 external splines 10 is arranged, there is internal spline 9 at the center of inner disc 4, forms spline pair 17 be slidingly connected (as Fig. 2, shown in Figure 4) between external splines 10 and the internal spline 9.

Adjust on nut 16 and the outer adjustment nut 8 hole 14 of adjustment is arranged.Be convenient to tighten or unclamp and adjust nut 16 and adjust nut 8 outward.

The diameter of the adjustment section 123 on the inner spindle 12 is greater than the diameter of glissile segment 122, and the diameter of glissile segment 122 is greater than the diameter of positioning section 121.Can be convenient to the location, install, dismantle.

When the utility model is used for the arrangement works of torque limited, common and other coupling is done as a whole use, coupling is as drive end (input end), usually the connecting pore 22 by through hole or screw form combines as a whole with the utility model structure, the utility model is used for the endoporus of inner spindle of structure of torque limited and the spindle nose of load end connects as a whole, when the utility model structure is used, be assembled into an integral body by shown in Figure 1 finishing earlier.To adjust the nut rotation with hook spanner before using, adjusting nut moves axially in inner spindle 12 upper edges, drive steel ball and apply axial force to pressing plate ring 6 reposefully, pressing plate ring 6 moves and holddown spring vertically, because the effect of spring force, spring 5 drives inner disc 4 and moves axially in spline 122 upper edges of inner spindle 12, the outer conical surface of its inner disc 4 just fits tightly with outer dish 1, produce frictional force, thereby make outer dish 1 drive inner disc 4 runnings, the internal spline of inner disc 4 drives and rotates simultaneously by the inner spindle 12 that external splines cooperates with it, and when inner spindle 12 was rotated, the load end that links with its endoporus rotated simultaneously.

When the moment of transmitting surpasses that inner disc 4 combine with outer dish 1 and the friction torque that produces, when promptly transshipping, the spring axial compression, inner disc 4 and coil 1 outward in the disengagement of conical surface junction stops operating immediately.When overload torque disappeared, in the time of in the normal range (NR), the pressure of spring was returned to normal range (NR) again, and inner disc 4 moves along the splined shaft of inner spindle 12, and outer dish 1, inner disc 4 are fitted tightly again, produces frictional force, runs well.

The following describes performance of the present utility model, but be not limited in following mode of execution.

Consult Fig. 6 as can be known: a kind of equivalent structure of inner spindle, the endoporus of inner spindle are unthreaded hole, and after the axle of load end inserted, locking plate (expansion coupling sleeve) locking was used in the outside, becomes flexible the locking plate bolt, can take out the axle of load end, and installing/dismounting is very convenient.

Consult Fig. 7 as can be known: the structure of the utility model torque limited is by elastic caoutchouc cover 28 and threaded pin 27, form the rubbercushioned sleeve bearing coupling of being with torque limited with the flange 25 that drive end connects, periphery 23 also can be used as the braking surface of the Brake drum of minor diameter (less than 400mm) simultaneously.

Consult Fig. 8 as can be known: be this structure periphery 23 because the Brake drum diameter increases (greater than 400mm) with the difference of Fig. 7, and increase the structure of Brake drum 29 outside.

Consult Fig. 9 as can be known: Fig. 9 with shown in Figure 1, replaces with brake disc 30 with periphery 23 equivalences for the elastic sleeve pin torque limited coupling of band brake dish, can adapt to the more and more wider axial brake structure of purposes.Two faces of brake disc 30 are braking surface.

Consult Figure 10 as can be known: torque limited structure of the present utility model connects by the diaphragm coupling 31 of connecting pore 22 with the left side, forms a kind of diaphragm coupling with torque limited

Consult Figure 11 as can be known: Figure 11 is the star coupling of band torque limited; be that with the difference of Figure 10 this torque limited structure connects by the star coupling of connecting pore 22 with left end; this coupling can compensate radially, axially, the angle error; and the realization overload protection, can be used for pump, blower fan, Hoisting Machinery.

Consult Figure 12 as can be known: Figure 12 is the Falk flexible coupling of band torque limited, is that with the difference of Figure 10 this torque limited structure is the Falk flexible couplings that connect by the left end of connecting pore 22.

Consult Figure 13 as can be known: Figure 13 is the duplex chain formula coupling of band torque limited, is this torque limited structure with the difference of Figure 10, and the left end by connecting pore 22 is that what to connect is duplex chain formula coupling 35.

Consult Figure 14 as can be known: Figure 14 is the drum-shaped tooth type shaft coupling of band torque limited, be that with the difference of Figure 10 the left end of this torque limited structure by connecting pore 22 is that what to connect is the flange plate 37 of band ring gear, external tooth is the half-coupling 36 and internal tooth engagement of crowned teeth, and periphery 23 equivalent transformations of torque limited structure are brake disc 30, have formed a kind of drum-shaped tooth type torque limited coupling that has brake disc.

Consult Figure 15 as can be known: Figure 15 is the rigid coupling of band torque limited, be this torque limited structure with the difference of Figure 10, what the left end by connecting pore 22 connect is rigidity half-coupling 38 and positioning ring 39, has constituted a kind of rigid coupling with torque limited.

Claims

1, the structure that is used for torque limited, it is characterized in that it comprises the outer dish (1) of being with internal conical surface, inner disc (4) with the band outer conical surface that is complementary with outer dish (1), one end of inner disc (4) has spring groove (15), spring groove (15) is structure ringwise, there is spring (5) to be positioned at spring groove (15), there is pressing plate ring (6) to be positioned at the outside of spring groove (15), there is inner spindle (12) to pass outer dish (1), the center of inner disc (4) and pressing plate ring (6), one end of inner spindle (12) is fixed on the outer dish (1) by positioning means, there is regulating mechanism in the outside of pressing plate ring (6), described regulating mechanism is threaded with inner spindle (12), inner spindle (12) is slidingly connected with the endoporus of inner disc (4), on the described outer dish (1) connecting pore (22) is arranged, the endoporus (11) that is connected with load end is arranged on the inner spindle (12).

2, the structure that is used for torque limited according to claim 1 is characterized in that on the described outer dish (1) periphery (23) or brake disc (30) being arranged,

3, the structure that is used for torque limited according to claim 1, it is characterized in that described positioning means comprises lock washer (21), be positioned at the nut (20) and the plane bearing (19) at lock washer (21) two ends, plane bearing (19) is sleeved on the inner spindle (12), one end of plane bearing (19) contacts with adjusting packing ring (21), the other end of plane bearing (19) and outer central recess (13) plane contact of coiling on (1).

4, the structure that is used for torque limited according to claim 1, it is characterized in that described spring groove (15) is made up of water jacket (151) and inside groove (152), inside groove (152) is for enclosing circular hole around inner disc (4) center splined hole equally distributed, and be positioned at the neutral position of water jacket (151), described pressing plate ring (6) is positioned at water jacket (151).

5, the structure that is used for torque limited according to claim 1 is characterized in that on the outer conical surface of described inner disc (4) oil groove (3) being arranged.

6, the structure that is used for torque limited according to claim 1 is characterized in that between described inner disc (4) and the outer dish (1) adjusting play (2) being arranged.

7, the structure that is used for torque limited according to claim 1, it is characterized in that described regulating mechanism comprises adjustment nut (16) and the outer nut (8) of adjusting that is positioned at pressing plate ring (6) outside, adjusts nut (16) and is positioned at pressing plate ring (6) and outer the adjustment between the nut (8).

8, according to claim 1 or the 3 described structures that are used for torque limited, it is characterized in that described inner spindle (12) is three stage structure, comprise positioning section (121), glissile segment (122) and adjust section (123), described glissile segment (122) is positioned at positioning section (121) and adjusts between the section (123), on the glissile segment (122) of inner spindle (12) external splines (10) is arranged, there is internal spline (9) at the center of inner disc (4), forms spline pair (17) between external splines (10) and the internal spline (9) and is slidingly connected.

9, the structure that is used for torque limited according to claim 7 is characterized in that described pressing plate ring (6) and adjusts between the nut (16) that steel ball (7) is arranged, and steel ball (7) is positioned at the arc groove on pressing plate ring (6) and the adjustment nut (16).

10, the structure that is used for torque limited according to claim 7 is characterized in that described adjustment nut (16) and outer the adjustment on the nut (8) have adjustment hole (14).