CN104343850B - Roller type contactless non-return device - Google Patents

Abstract

The invention relates to a roller type contactless non-return device, in particular to a non-return device used for preventing a transmission device from reversing in a mechanical transmission device. When the non-return device normally runs, an inner ring 9 rotates, and a baffle plate 10 drives a retainer to simultaneously run in the same direction as rollers 8. When the non-return device is non-return, a transmission shaft can drive the inner ring 9 to reversely run, and the retainer 6 is pulled by the action force of a tension spring 5 to drive the rollers 8 to reversely run; a ratchet wheel surface of the inner ring 9 oppresses the rollers 8 to transfer torque to an outer ring 4 to cause maximum positive pressure, and the retainer ensures that the positions of a plurality of rollers 8 are the same; the reverse torque of the outer ring 4 enables the rollers not to loosen, the contact surfaces of the rollers have maximum friction, and the non-return effect is achieved. The invention provides the non-return device which is uniform in stress, high in non-return speed, low in abrasion, low in running resistance and long in service life.

Description

Roller Non-contact backstop

Technical field：

Involved by roller Non-contact backstop of the present invention is to be used in a kind of mechanical driving device preventing this transmission The holdback that device reverses.

Background technology：

Domestic at present commonly used holdback, is mainly made up of outer ring, inner ring, voussoir, roller and the arm of force.Adopt It is voussoir check, voussoir carries press contacts with inside and outside circle, and when mechanical driving device rotates backward, voussoir direction is sent out Raw transformation, thus reach check purpose；The holdback of this kind of structure, has friction all the time with inside and outside circle when voussoir runs, and is formed relatively Big running resistance, and contacting all the time in the same area, this region can be caused with larger abrasion for permanent operating so as to check performance Reduce.The holdback therefore using at present rotates that voussoir abrasion is excessive for a long time, and check angle diminishes so that holdback uses the longevity Life reduces, simultaneously it is also possible to major accident can be caused；And the requirement on machining accuracy of voussoir is very high, by mould, batch etc. Impact it is more difficult to ensure uniformity.

Content of the invention：

Now have problems to improve Wedge-type holdback, roller Non-contact backstop of the present invention provides one kind and is subject to Power is uniformly, check speed is fast, low abrasion, low running resistance and a kind of long-life holdback.

Roller Non-contact backstop of the present invention is by the arm of force, bearing pin, side plate, outer ring, extension spring, retainer, bearing, rolling Post, inner ring and baffle plate composition；The arm of force is connected by bearing pin with the side plate in holdback main body, and side plate is connected with outer ring, extension spring One end is connected with inner ring, and one end is connected with retainer, and retainer is installed in the space formed between outer ring and inner ring, retainer Block is installed, bearing is installed on inner ring and side sheet room, inner ring has multiple check planes or class ratchet, roller is arranged on inner ring In dead slot between check plane and outer ring, inner ring is arranged on the shaft extension of transmission device；Retainer by multiple roller uniform locations, The strict radial direction limiting roller and axial activity space, cooperation inner ring implements check；Block limit retainer axial location so that Retainer can operate in the same direction with outer ring and inner ring；Extension spring provides a twisting resistance to make retainer drive roller to inner ring check plane Wedging direction phase is adjacent to；Bearing ensures to form the precision in uniform gap between inside and outside circle, reduces running resistance so that inverse simultaneously Only better；The cavity of retainer design makes roller and the contactless operating in outer ring, contacts with inner ring check plane and nothing Relative motion.

When holdback runs well, inner ring rotates, and baffle plate drives retainer to operate in the same direction with roller simultaneously.

When holdback check, power transmission shaft can drive inner ring antiport, and now retainer can drawing in extension spring active force Dynamic lower drive roller reversion, the check plane compressing roller of inner ring causes maximum positive voltage power to outer ring transmitting torque, and retainer is true The position protecting multiple rollers is identical, by the reactive torque of inner ring, roller will not be got loose, maximum friction in contact surface, reaches Check effect.

The having the beneficial effects that of roller Non-contact backstop of the present invention：Eliminate the voussoir of not easy processing, employ The roller that is easily worked and measures is it is ensured that all roller accurate size uniformity.The surface contacting with roller generation check is Outer ring arc face and inner ring check plane, the whole body length of roller uniformly bears load, check director space diminish so that Multiple rollers and outer ring and inner ring is locked reaches good check effect during check, and check power is bigger, check effect is more steady Gu.In check, the check position of roller is random, has the more long-life, and Wedge-type is all the time only in same position, along with just Friction when often running is it is easier to abrasion.During roller type brake operating, roller and outer ring disengage, to inner ring check plane No relatively roll and rub, therefore abrasion is had no to inner ring and outer ring.The extension spring group Main Function being installed on retainer is to make Roller keeps check trend.And due to equipped with import high-precision bearing so that between inside and outside circle formed uniform gap, in retainer Being accurately positioned under, each roller all can be actively engaged in check so check effect is good.Some is thus substantially increase this above The life-span of product and performance.

Brief description：

Accompanying drawing 1 is the front view of the present invention；

Accompanying drawing 2 is the profile of the present invention；

Each parts enlarged drawing when accompanying drawing 3 operates for the present invention and during check.

Specific embodiment:

It is illustrated in conjunction with accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, roller Non-contact backstop of the present invention is by the arm of force 1, bearing pin 2nd, side plate 3, outer ring 4, extension spring 5, retainer 6, bearing 7, roller 8, inner ring 9 and baffle plate 10 form；On the arm of force 1 and holdback main body Side plate 3 coupled by bearing pin 2, side plate 3 is connected with outer ring 4, and internal retainer 6 is installed on what outer ring 4 and inner ring 9 were formed In space, inner ring 9 is arranged on the shaft extension of transmission device, and inner ring 9 is uniformly distributed multiple check planes, roller 8 and outer ring 4 Contact, be arranged in outer ring 4 and inner ring 9 check interplanar dead slot and by retainer 6 by multiple roller 8 uniform locations, sternly Lattice limit the radial direction of roller 8 and axial activity space, to reach, during cooperation outer ring 4 check, the check effect consolidating rapidly.Protect Hold frame 6 and block 10 is installed, block 10 limits retainer 6 axial location, the retainer 6 making can be transported in the same direction with outer ring 4 and inner ring 9 Turn；Extension spring 5 provides a twisting resistance to make retainer 6 drive roller 8 to be adjacent to inner ring 9 check plane wedging direction phase.Inner ring 9 with Bearing 7 is installed between side plate 3, bearing 7 ensures to reduce operating resistance while the precision forming uniform gap between inside and outside circle Power is so that check is better.

When holdback runs well, inner ring 9 rotates, and baffle plate 10 drives retainer 6 to operate in the same direction with roller 8 simultaneously, due to The cavity effect of retainer 6 particular design makes roller 8 and the contactless operating in outer ring 4, contacts with inner ring 9 check plane and nothing Relative motion, this design limits the activity space of roller 8, guarantees roller 8 and inner ring 9, outer ring 4 parallel contact simultaneously, reduces rolling Rub between post 8 and retainer 6.

When holdback check, power transmission shaft can drive inner ring 9 antiport, and now retainer 6 can be in extension spring 5 active force Lower drive roller 8 is pulled to invert, the check plane compressing roller 8 of inner ring 9 causes maximum positive voltage power to outer ring 4 transmitting torque, protects Holding frame 6 guarantees that the position of multiple rollers is identical, by the reactive torque of outer ring 4, roller will not be got loose, and contact surface occurs maximum Friction, reaches check effect.

Claims (2)

1. roller Non-contact backstop it is characterised in that：By the arm of force (1), bearing pin (2), side plate (3), outer ring (4), extension spring (5), retainer (6), bearing (7), roller (8), inner ring (9) and baffle plate (10) composition；Side on the arm of force (1) and holdback main body Plate (3) passes through bearing pin (2) and connects, and side plate (3) is connected with outer ring (4), and extension spring (5) provides a twisting resistance, extension spring (5) one end and Inner ring (9) connects, and one end is connected with retainer (6), and retainer (6) is installed between outer ring (4) and inner ring (9), retainer (6) Block (10) is installed, block (10) limits retainer (6) axial location；Bearing (7) be installed on inner ring (9) and side plate (3) it Between, inner ring (9) is formed with ratchet, roller (8) is arranged in dead slot between inner ring (9) ratchet and outer ring (4), and inner ring (9) is arranged on On the shaft extension of transmission device.

2. according to claim 1 roller Non-contact backstop it is characterised in that：Retainer (6) is by multiple rollers (8) Uniform location.