Bidirectional-acting belt type brake
A technology of band brakes and two-way action, applied in the direction of mechanically driven drum brakes, brake parts, etc., can solve the problems of poor braking effect, increased manufacturing cost, and difficulty in popularization, so as to eliminate one-way follow-up and reduce manufacturing costs. cost, and the effect of improving the cleaning rate
Inactive Publication Date: 2014-12-03
ANHUI JULONG TRANSMISSION TECH
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Problems solved by technology
[0002] At present, the band brakes used in conventional machinery are generally one-way acting. One end of the brake band assembly is fixed, and the other end is tightened by the brake lever. The advantages are simple structure and low cost. The disadvantages are: only It has one-way effect, that is, the braking effect of the brake is related to the rotation direction of the brake wheel. When the brake wheel rotates in the direction of the tension end of the brake band assembly, the braking effect is very good due to the increased force of the friction force. , but when the brake wheel rotates towards the fixed end of the brake band assembly, due to the effect of friction, it will try to push the brake band assembly away, so the braking effect is very poor; The disadvantage of the conventional brake is that a one-way bearing or one-way spring is generally attached to the relevant position of the brake wheel, but the manufacturing cost is increased.
[0003] Recently, double unidirectional acting belt brakes have also been adopted, which are installed staggered with each other to solve the problem of bidirectional braking, but the structure is complicated and it is not easy to popularize.
[0004] In my country's patent literature, there is an application number of 200810108112.3, which is a patent document named a washing machine band brake method and its washing machine band brake. The brake lever of the washing machine band brake and the brake band assembly A locking device is provided, and the locking device is supported on the rectangular window provided on the supporting bracket, and is connected with the two ends of the brake rod and the brake band assembly; the above-mentioned locking device is mainly composed of radial pull rods, The cam plate is composed of hinged joints. The radial pull rod is installed in the middle of the hinged cam plate. The end of the cam plate is supported on the rectangular window provided by the supporting bracket. The brake lever passes through the radial pull rod, the cam plate and the brake band assembly. The end of the washing machine is connected; the washing machine band brake manufactured by the above-mentioned patent document is used on the washing machine, although the braking effect can be acceptable under the situation of canceling the conventional additional one-way bearing or one-way spring, but in braking and There will be a certain amount of noise during the relaxation process, which is not easy to meet the noise requirements of the washing machine
The belt brake of the washing machine manufactured by the above patent documents also has the defects of complex structure, high production cost and difficult assembly
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[0021] combine figure 1 , figure 2 , a two-way acting band brake, which is mainly composed of a brake lever 1, a pin shaft 2, a brake spring 3, a fixed shaft 4, a cylindrical pin 5, a brake band assembly 7, a brake wheel 8, a support bracket 9 and an elastic The pull rod 10 is composed of; the fixed shaft 4 is fixed on the support bracket 9, the brake lever 1 and the brake spring 3 are looped on the fixed shaft 4, the brake band assembly 7 is set on the brake wheel 8, and the support bracket 9 is set There is a rectangular window, elastic pull rod 10 (refer to image 3 ) is placed in the window, the joint end a is hinged with the brake lever 1 through the pin shaft 2, and the separated ends b and c are hinged with the two symmetrical ends of the brake band assembly 7 through the cylindrical pin 5. The shape of elastic pull rod 10 refers to image 3 As shown, it is in the shape of "∧", and its separation end b and separation end c have transverse elasticity. When the passiv...
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The present invention discloses a bidirectional-acting belt type brake, which relates to the technical field of machinery design manufacture, particularly to a belt type brake of a washing machine. Two ends of the brake belt assembly of the bidirectional-acting belt type brake are symmetrical, when the brake belt is in a tensioning state, the brake belt, the two ends of which are simultaneously tensioned to become tension ends and fixed ends automatically, plays the role of bidirectional braking. An elastic pull bar arranged between the brake bar of the bidirectional-acting belt type brake and the brake band assembly is disposed in a rectangular window arranged on a support tray, and is hinged with the brake bar and the two symmetrical ends of the brake belt assembly. The bidirectional-acting belt type brake provided by the invention is applied to washing machines, the conventional additional unidirectional bearing or unidirectional spring can be cancelled, and the manufacture cost of the washing machine deceleration clutch is reduced. The bidirectional-acting belt type brake provided by the invention is simple in structure, and the braking torques at the two ends of the brake belt are balanced mutually, which can eliminate the unidirectional rotation, reduce the winding of clothes, and improve the cleaning rate of clothes.
Description
technical field [0001] The technical solution of the invention relates to the technical field of mechanical design and manufacture, in particular to a washing machine band brake. Background technique [0002] At present, the band brakes used in conventional machinery are generally one-way acting. One end of the brake band assembly is fixed, and the other end is tightened by the brake lever. The advantages are simple structure and low cost. The disadvantages are: only It has one-way effect, that is, the braking effect of the brake is related to the rotation direction of the brake wheel. When the brake wheel rotates in the direction of the tension end of the brake band assembly, the braking effect is very good due to the increased force of the friction force. , but when the brake wheel rotates towards the fixed end of the brake band assembly, due to the effect of friction, it will try to push the brake band assembly away, so the braking effect is very poor; The disadvantage o...
Claims
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IPC IPC(8): F16D49/10F16D65/06
Inventor 刘军薛华林葛宁洁
Owner ANHUI JULONG TRANSMISSION TECH