CN201277281Y - Non-pawl universal reversing brake wheel - Google Patents

Abstract

The utility model relates to an all-purpose reverse braked wheel without pawls, wherein the middle portion of the periphery of a drive shaft sleeve whose center hole is provided with a key groove is provided with three or more ratchets, a sleeve ring whose outer periphery is provided with a key groove is sleeved on a drive shaft sleeve through a bearing sleeve, a radial groove is arranged on the central portion of an inner hole of the sleeve ring, and rollers whose quantity is consistent to the ratchets are mounted in the radial groove. The all-purpose reverse braked wheel has the characteristics of simple structure, easy maintenance, durable service, long service span and low noise, which is not provided with vulnerable components such as pawls and springs and the like, and is beneficial for protecting environment, and the rollers are not easy to abrade.

Description

The general reverse Brake drum of pawl-less

Technical field

The utility model relates to the transmission device of using on a kind of farm machinery, mining machinery, the domestic electric appliance with reverse braking function.

Background technique

A large amount of belt pulleys that use on farm machinery (as rice milling machine, shredder pulping machine or milling machine etc.), mining machinery, domestic electric appliance drive work mechanism by motor through belt gear and rotate.Drive a plurality of work mechanisms again if on same equipment, have only a motor and rotate simultaneously or step by step, then reverse Brake drum need be installed on motor main shaft.Two reverse Brake drums for example are installed on the combined rice polisher motor main shaft are driven rice milling machine and shredder through belt respectively, when motor just changeed, rice milling machine rotated and reverse Brake drum makes the shredder stall; When motor reversed, shredder rotated and reverse Brake drum makes the rice milling machine stall.

Existing various reverse Brake drum all adopts ratchet ratchet driving mechanism, its ratchet spring frangibility easy to wear, that especially ratchet is resetted, defectives such as therefore complex structure being arranged, be not durable, fragilely, difficult safeguard, noise is big.

Summary of the invention

The purpose of this utility model provides the general reverse Brake drum of a kind of pawl-less, accomplishes simple in structure, durable in use.

Technological scheme is: the center hole tool has three or three above ratchets with the driving sleeve periphery middle part of keyway, the lasso that periphery has a keyway by bearing housing on driving sleeve, there is radial groove at lasso endoporus middle part, is equipped with in the radial groove and the corresponding to roller of ratchet quantity.

Using method and working principle are as follows:

If driving sleeve is installed on the motor main shaft by the key pin forward, the belt pulley, gear or the sprocket wheel that drive work mechanism A are connected firmly on lasso by key pin, so when the driven by motor driving sleeve turns clockwise, roller will along the ratchet involute towards outside move, when moving to gap between ratchet and the lasso less than the roller diameter, ratchet then drives lasso by roller extruding lasso and turns clockwise, thereby drives work mechanism A rotation.When the motor drives driving sleeve is rotated counterclockwise, roller will be pressed close to the sagittal plane of ratchet along the ratchet involute towards interior moving, and the gap between ratchet and the lasso is greater than the roller diameter at this moment, and roller can not push lasso, driving sleeve dallies in lasso, makes work mechanism A stall.

If oppositely be installed in driving sleeve on the motor main shaft, the belt pulley, gear or the sprocket wheel that drive work mechanism B are connected firmly on lasso, so according to above-mentioned identical principle: when the motor drives driving sleeve is rotated counterclockwise, ratchet then drives the rotation of lasso inverse clock by roller extruding lasso, thereby drives work mechanism B rotation.When the motor drives driving sleeve turned clockwise, roller can not push lasso, and driving sleeve idle running makes work mechanism B stall.

If two reverse Brake drum one forwards, that will drive work mechanism A, B respectively oppositely are installed on same the motor main shaft, when motor main shaft turned clockwise, work mechanism A rotated and work mechanism B stall so.When motor main shaft was rotated counterclockwise, work mechanism A stall and work mechanism B rotated.

Compared with the prior art, characteristics of the present utility model are simple in structure, do not have easily damaged partss such as ratchet, spring, safeguard easily; Roller is not easy to wear, and is durable in use, long service life, and noise is low, helps environmental protection.

Description of drawings

Fig. 1 is the general reverse Brake drum master pseudosection of pawl-less

Fig. 2 is that the A of Fig. 1 is to sectional drawing

Fig. 3 is the driving sleeve plan view

Fig. 4 is that the B of Fig. 3 is to sectional view

Fig. 5 is the lasso plan view

Fig. 6 is a lasso left side pseudosection

Embodiment

As shown in the figure, center hole has the lasso 5 that has 4 ratchets 3, periphery to have keyway 4 in the middle part of driving sleeve 2 peripheries of keyway 1 and is enclosed within on the driving sleeve 2 by bearing 6, and there is radial groove 8 at lasso 5 endoporus middle part, is equipped with 4 rollers 7 in the radial groove 8.

Claims (1)

1, the general reverse Brake drum of a kind of pawl-less, it is characterized in that center hole has the driving sleeve of keyway (1) (2) periphery middle part three or three above ratchets (3) are arranged, the lasso (5) that periphery has keyway (4) is enclosed within on the driving sleeve (2) by bearing (6), there is radial groove (8) at lasso (5) endoporus middle part, is equipped with in the radial groove (8) and the corresponding to roller of ratchet (3) quantity (7).

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