CN203756795U

CN203756795U - Reducer with internal-teeth ratchet wheel and pallet brake

Info

Publication number: CN203756795U
Application number: CN201420070633.5U
Authority: CN
Inventors: 张国林; 张明荣; 顾卫红; 刘永清
Original assignee: TAIXING SPEED REDUCER CO Ltd
Current assignee: TAIXING SPEED REDUCER CO Ltd
Priority date: 2014-02-19
Filing date: 2014-02-19
Publication date: 2014-08-06
Anticipated expiration: 2024-02-19

Abstract

The utility model relates to a reducer with an internal-teeth ratchet wheel and pallet brake, wherein the brake is sleeved on the reducer shaft, the brake comprises an internal-teeth ratchet wheel, pellets, a star wheel and a torsional spring, the star wheel is connected to the reducer shaft by key connection, the multiple pellets are respectively connected on the outer circumference of the star wheel uniformly and movably by a pin shaft, a claw head of the pellet and a pellet gravity center are respectively located on both sides of the pin shaft, the internal-teeth ratchet wheel is sleeved outside the star wheel and the pellets, the torsional spring is sleeved on the pin shaft and two feet of the torsional spring are respectively connected to the pellets and the star wheel. The reducer has the simple structure and stable brake performance, can effectively avoid friction between the pellets and the ratchet wheel under a surpassing state, has no noise or abrasion, saves energy, reduces consumption and has long service life.

Description

A kind of speed reducer with internal tooth ratchet wheel pawl brake

Technical field

The utility model relates to a kind of speed reducer, is a kind of speed reducer with internal tooth ratchet wheel pawl brake specifically.

Background technique

The conventional non-return device of common speed reducer is roller overrunning clutch and click clutch, and roller overrunning clutch adopts star-wheel five deciles to coordinate five rollers conventionally, ensures to meet roller simultaneously stressed and impartial, roller is that line contacts with raceway, star-wheel plane, and contact stress is large, bears check moment little, pressure angle is excessive easily to skid, be difficult for wedging, pressure angle is too small, and wedging is easy, tearaway load is large, accuracy of manufacturing requires high, in industrial application, and check unstable properties; And click clutch conventionally adopt ratchet under spring-force driven dual with ratchet engage, skid realize close from, but ratchet skids all the time on ratchet, easily produces friction noise and wearing and tearing, and produces friction energy loss.

Summary of the invention

While use for click clutch in prior art, friction noise and wearing and tearing are large, there is the problem of larger friction energy loss, it is a kind of simple in structure that the utility model provides, check stable performance, can effectively avoid ratchet surmounting under state and the friction of ratchet, noise free, wearing and tearing, the speed reducer with internal tooth ratchet wheel pawl brake of energy-saving and cost-reducing, long service life.

In order to achieve the above object, the technical solution adopted in the utility model is: a kind of speed reducer with internal tooth ratchet wheel pawl brake, its technical characterstic is cross-under non-return device on described reductor shaft, non-return device comprises internal tooth ratchet, ratchet, star-wheel and torsion spring, described star-wheel is connected on reductor shaft through key, described many ratchets are evenly movably connected on star-wheel excircle through bearing pin respectively, pawl head and the ratchet center of gravity of ratchet lay respectively at bearing pin both sides, described internal tooth ratchet sleeve is connected to outside star-wheel and ratchet, described torsion spring is connected on bearing pin, the bipod of torsion spring connects respectively ratchet and star-wheel.

Further, the star-wheel of any one or both sides of described bearing pin is provided with and prevents the inwardly excessive adjusting lock screw of rotation of ratchet.

When speed reducer starts, when reductor shaft drives star-wheel to turn clockwise, ratchet produces centrifugal force, act on mass cg, centrifugal force is radially outside, ratchet is installed to bearing pin and produce counterclockwise moment of torsion, this moment of torsion overcomes torsion spring moment of torsion is rotated counterclockwise ratchet, accelerating rotating speed with reductor shaft improves, centrifugal force increases, generation centrifugal moment increases, reaching rated speed, centrifugal moment maximum, ratchet overcomes torque spring maximum working torque, ratchet pawl head contacts and is depressed into the adjusting dogbolt of the first side of ratchet pawl, now ratchet exterior arc surface does not contact with ratchet internal surface, without friction noise and wearing and tearing, star-wheel normally moves with reductor shaft.

When speed reducer out of service, reductor shaft inertial rotation, its kinetic energy overcomes load resistance to be reduced gradually, rotating speed slows down gradually, ratchet centrifugal force reduces gradually, centrifugal moment reduces, under torsion spring torsional interaction, ratchet turns clockwise around bearing pin, ratchet pawl head leaves its pawl head side and regulates lock screw, slow to certain rotating speed, until speed reducer stops, under spring initialization torsional interaction, ratchet is top can be reached ratchet slot bosom and produce contact, after speed reducer stops, speed reducer reversion under load drives, now reductor shaft axle is rotated counterclockwise, at the bottom of three ratchet heads withstand ratchet slot, surface of contact produces pressure, form check moment and load torque balance, stop speed reducer reversion, push up to the adjusting lock screw of its center of gravity side at ratchet, can effectively prevent that it from reversing the damage of transition to ratchet slot, extends whole service life.

The utility model mutually staggers the pawl head of ratchet and center of gravity and is arranged at its rotation articulating point both sides, adjusting lock screw on cooperation star-wheel is in ratchet inner side limiting-position ratchet pawl head side and center of gravity side, realize stable forward and the safe check of reductor shaft, have simple in structure, stable performance, can effectively avoid ratchet surmounting under state and the friction of ratchet, noise free, wearing and tearing, the advantage of energy-saving and cost-reducing, long service life.

Brief description of the drawings

Fig. 1 is the utility model structural representation.

In figure: reductor shaft 1, key 2, star-wheel 3, regulates lock screw 4, ratchet 5, ratchet center of gravity 6, bearing pin 7, torsion spring 8, internal tooth ratchet 9.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Shown in Fig. 1, a kind of speed reducer with internal tooth ratchet wheel pawl brake, on reductor shaft 1, connect star-wheel 3 through key 2, many ratchets 5 are evenly movably connected on star-wheel 2 excircles through bearing pin 7 respectively, the star-wheel 2 of bearing pin 7 ratchet sides is provided with and prevents the inwardly excessive adjusting lock screw 4 of rotation of ratchet, and the pawl head of ratchet and ratchet center of gravity 6 lay respectively at bearing pin 7 both sides, and internal tooth ratchet 9 is socketed on outside ratchet 5, torsion spring 8 is connected on bearing pin 7, and the bipod of torsion spring connects respectively ratchet and star-wheel.

Claims

1. the speed reducer with internal tooth ratchet wheel pawl brake, it is characterized in that: cross-under non-return device on described reductor shaft, non-return device comprises internal tooth ratchet, ratchet, star-wheel and torsion spring, described star-wheel is connected on reductor shaft through key, many ratchets are evenly movably connected on star-wheel excircle through bearing pin respectively, pawl head and the ratchet center of gravity of ratchet lay respectively at bearing pin both sides, described internal tooth ratchet sleeve is connected to outside star-wheel and ratchet, described torsion spring is connected on bearing pin, and the bipod of torsion spring connects respectively ratchet and star-wheel.

2. a kind of speed reducer with internal tooth ratchet wheel pawl brake according to claim 1, is characterized in that: the star-wheel of any one or both sides of described bearing pin is provided with and prevents the inwardly excessive adjusting lock screw of rotation of ratchet.