CN201074667Y

CN201074667Y - Moment limiter with emergency system

Info

Publication number: CN201074667Y
Application number: CNU2007201124685U
Authority: CN
Inventors: 刘硕毅; 胡发煜; 王宾华; 李学年; 芮燃炜
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-08
Filing date: 2007-08-08
Publication date: 2008-06-18
Anticipated expiration: 2017-08-08

Abstract

The utility model relates to a force moment limiter with an emergency system, wherein a solar wheel (13), a planetary wheel (9) and an inner gear ring (7) form two free degree planetary wheel driving systems, and power is input by an input axle (12) and is output by an output solar wheel (11). A pressure spring (10), a clutch fixed shelf (5), a left friction ring (6), the inner gear ring (7), and a right friction ring (8) and a casing (2) form a double-face friction force generating system. When resistance of the output solar wheel (11) is increased, even if the solar wheel (13) rotates, but the output solar wheel (11) does not rotate due to the rotation of the inner gear ring (7), and the output force is limited. A handgrip (1), the casing, an eccentric shaft (3) and a sealing ring (4) form a friction force emergency controllable increasing system, the eccentric shaft (3) generates positive pressure to the clutch fixed shelf (5), thereby increasing friction force, increasing force moment which is originally set, and improving confining force.

Description

A kind of limiter of moment with emergency system

Technical field

The utility model relates to the gear transmission transmission system, can limit the transferring power size in the power transmission process, is applicable to various power transmission system.

Background technique

Power or motion that general gear train assembly is transmitted are rigidity, the motion of prime mover input or power will be by exporting after the velocity ratio speed change of setting through gear train assembly, and no matter the size of input power, even transferring power fractures wheel tooth portion when too big, or with damage of components such as axle, keys.

Take to limit the mode of power to mainly contain for preventing that transferring power is excessive in power transmission system: 1 prime mover stall stops power transmission, and this method proposes excessive demand to prime mover, and simultaneously long-term stall will damage prime mover; 2 belt pulley transmissions overload is skidded, and the bulk that this method requires is big, and needs tension system, complex structure; 3 adopt electromagnetic forces or the frictional force overload restraining moment that skids, reliable when this method is used as separate part, but the bigger space mounting of needs; 4 adopt electron controls technology, and this method is confined to the relevant automatical control system of using; 5 adopt the mechanical structure control technique, and this method has impact force, and system is stable inadequately.

Adopted in power transmission system after the moment restriction is can protective system safety; but some moment limiting system such as spring force limit; along with its constraining force of growth of time will diminish; and; some application places may not need the moment restriction temporarily; when saving oneself such as the electric capstan winch of employing; first possibly according to field condition to rescue vehicle; rather than to protect electric capstan winch; need interim cancellation limiter of moment this moment, and this limiter of moment that can conveniently control is not seen application on electric capstan winch.

Summary of the invention

The purpose of this utility model provides a kind of limiter of moment with emergency system, solve above-mentioned limiter of moment complex structure, be difficult to adjust problem such as control, develop a kind of in conjunction with adjusting the planetary pinion driving torque limiter that simplifies the internal structure of an organization that frictional force limits in the planetary pinion transmission.

The technological scheme that the utility model technical solution problem is adopted is: the planetary transmission system of using two-freedom, realize power limit output by frictional force restriction ring gear rotation when transshipping of setting, in the interim cancellation of needs or adjust the place of moment restraint, increase frictional force by rotating emergency cock greatly and limit ring gear and rotate and realizes interim cancellation or increase moment limitation capability.A kind of limiter of moment with emergency system of the present utility model mainly comprises three parts: the one, and both surface friction power produces system; The 2nd, the emergent controlled increase of frictional force system; Three is two from spending planetary transmission system.

The effect that the utility model is useful is: the in addition controllable frictional force of the ring gear in the two-freedom planetary pinion biography system is realized limit power, and it is few to have component, and volume is little, is convenient to adjust control, and is simple in structure.

Description of drawings

Fig. 1 is the utility model general assembly sketch;

Fig. 2 is the front view that frame is decided in clutch of the present utility model;

Be labeled as among the figure: 1 handle set; 2 casings; 3 eccentric shafts; 4 seal rings; Frame is decided in 5 clutches; 51 add emergent power place; 52 add the spring force place; 53 with the casing cooperation place; 6 left friction rings; 7 ring gears; 8 right friction rings; 9 planet wheels; 10 pressure springs; The big sun wheel of 11 outputs; 12 input shafts; 13 sun gears.

Embodiment

A kind of limiter of moment of the present utility model with emergency system, as shown in Figure 1, sun gear 13, planet wheel 9, ring gear 7 are formed the two-freedom planet gear transmission system, power is exported by output sun gear 11 from its planet carrier after two-freedom planet gear transmission system speed change by input shaft 12 inputs.Pressure spring 10, clutch are decided frame 5, left friction ring 6, ring gear 7, right friction ring 8 and casing 2 and are formed both surface friction power generation system.Pressure spring 10 is decided frame 5, left friction ring 6, ring gear 7, right friction ring 8 with clutch and is pressed to casing 2, when output sun gear 11 resistances increase, surpass the frictional force of left and right sides friction ring to ring gear 7, ring gear 7 will rotate, even sun gear 13 rotates but exports sun gear 11 and can not rotate because of ring gear 7 rotates at this moment, that is to say that its ouput force obtains restriction.Handle set 1, casing 2, eccentric shaft 3 and seal ring 4 are formed the emergent controlled increase of frictional force system, and handle set 1 is installed on the casing 2, and eccentric shaft 3 is installed in the handle set 1, and seal ring 4 is pressed into the salable and restriction eccentric shaft 3 in handle set 1 back and moves axially.When the long-time compression of pressure spring 10 back pressure reduces and causes limit power to reduce, or when needing interim cancellation or adjusting moment limit device, eccentric rotation axis 3 adds frictional force thereby will decide frame 5 generation positive pressures to clutch, increases the moment of former setting, the raising restraint.

As shown in Figure 2, pressure spring 10 acts on that the adding spring force place 52 of frame 5 decided in clutch and produces the frictional force of setting, eccentric shaft 3 acts on clutch and decides adding of frame 5 emergent power place 51 and produce emergent positive pressure, what frame 5 was decided in clutch cooperates the back to produce can radially to maintain static after the frictional force moving with casing cooperation place 53 with casing 2, but can move axially.

The present invention fully adopts aluminium die casting, stamping part and machined piece, is fit to the mass production processes technical requirements, and the product model machine is tentatively finished and by test, all kinds of Mold Makings are also finished substantially, has now entered the small lot test manufacture.

Claims

1. limiter of moment with emergency system, it comprises handle set (1), casing (2), eccentric shaft (3), seal ring (4), frame (5) is decided in clutch, add emergent power place (51), add spring force place (52), with casing cooperation place (53), left side friction ring (6), ring gear (7), right friction ring (8), planet wheel (9), pressure spring (10), sun gear (13), it is characterized in that: sun gear (13), planet wheel (9), ring gear (7) is formed the two-freedom planet gear transmission system, pressure spring (10) is decided frame (5) with clutch, left side friction ring (6), ring gear (7), right friction ring (8) is pressed to casing (2), ring gear (7) produces friction torque, handle set (1) is installed on the casing (2), eccentric shaft (3) is installed in the handle set (1), seal ring (4) is pressed into the salable and restriction eccentric shaft (3) in handle set (1) back and moves axially, and eccentric rotation axis (3) can decide frame (5) generation positive pressure to clutch.

2. a kind of limiter of moment as claimed in claim 1 with emergency system, it is characterized in that: pressure spring (10) acts on and adds spring force place (52), eccentric shaft (3) acts on and adds emergent power place (51), with casing cooperation place (53) with can radially maintain static after casing (2) cooperates movingly, but can move axially.