CN201354129Y - Miniature band-type brake with spring type locking ring - Google Patents

Abstract

A miniature band-type brake with a spring type locking ring consists of a pincer-like structure and the spring type locking ring, wherein the pincer-like structure is connected to a positioning rod and the spring type locking ring is wound on a brake ring. When two driving rods which are pincer-like are closed, locking power of the locking ring to the brake ring and rubbing force of the brake ring to the locking ring can be increased alternatively until the tire is pulled. The brake is strong in braking, uniform in deceleration and low in inner resistance without asbestos or noises, the fatigue limit of the brake is up to 50,000 times, assembling weight thereof is 165+-10g, and all the components of the brake utilize domestic copper materials and conventional machining with domestic new low cost. The miniature band-type brake is adaptable to various models such as bicycles and electric vehicles.

Description

The miniature band-type brake of spring formula lock ring

Affiliated technical field

The utility model relates to a kind of bicycle brake, especially the all-metal band-type brake.

Background technology

For the supporting main flow brake of China's bicycle---traditional band-type brake has stepped into the senility already. its asbestos content and noise level are not more and more allowed by environment; Big and heavy outward appearance is extremely unbecoming with car load weight-saving development tendency; Especially the compression of the lifting of performance and cost is because of the limitation of natural mode, though still improve hopeless through striving for many years.Yet the price of seeking survival that the obsolete techniques that come to this but exchange for meagre profit by feat of it has occupied the half of the country in China bicycle market and with many new techniques, comprise me in exploitation in 02 year, detect " the miniature band-type brake of oily attitude spiral lock ring " (patent No.: ZL02237227X is to call former lock in the following text) of classifying high-quality product as through country and keep off outside the gate in market.

This shows that under the condition that the whole class of bicycle industry is not high in China, meagre profit is runed, a kind of competition of technology grade is not only in the upgrading of product, especially the trial of strength of a cost of product.

Summary of the invention

The purpose of this utility model is: lock the performance advantage of high-grade lock tool, adopt the mode of little loss processing significantly to cut down cost of manufacture, thereby for people provide a kind of real environmental protection material-saving, traditional band-type brake is had the lock tool elaboration of replacement meaning.

The utility model addresses this problem the technical scheme that is adopted:

On radius stay, forward and backward drive spindle is linked to be a pincerlike structure with axle.Its two galianconism and left-handed two to three weeks, the forward and backward termination of spring formula lock ring on brake ring mesh together respectively, and its two long-armed tail end connects together with brake cable.

In order to obtain best quiet brake torque, the radian value of the effective cornerite of this lock lock ring should in line with its with gauge target pressure square, hard steel between lubricate attitude coefficient of static friction substitution Euler's formula after, the policy setting that effective transmission value of its result is 160 ± 10NM; The radial shrinkage that requires this setting value that spring formula lock ring tail end is produced simultaneously press and the ratio of head end tangential force less than the inverse of friction coefficient between lock ring and the brake ring, in order to avoid produce the ring-type self-locking.

Adopt the beneficial effect of this programme to be:

1, the pressure that can produce the brake distance of realizing ideal is moved;

2, can realize strict geometric ratio supercharging, the flexible deceleration;

3, accomplish nuisancelessly, comprise no asbestos and noiselessness;

4, the equivalent coaster brake function that possesses zero cost;

5, self hangs down internal resistance;

6, front and back wheel is general;

7, wearing and tearing and fatigue limit can reach 50,000 times at least, can satisfy the lifelong brake needs of car body;

8, Ultra Low Cost reduces by 1/3rd than former lock, and half of traditional band-type brake only arranged;

Description of drawings

The integral structure accompanying drawing of this lock as after, Fig. 1 is the structural front view of embodiment, is inner structure between the long and two-short dash line, (1) is brake clip among the figure, and (2) are radius stay, and (3) are the line transfer bolt, (4) be locating dowel pin, (5) be the before driving bar, (6) drive spindle connecting shaft, (7) are the rear drive bar, (8) be the lock beans, (9) spring formula lock ring, (10) are brake ring, and (11) are fuse-box.

The specific embodiment

In the embodiment shown in fig. 1, at first radius stay (2) afterbody is fastened on a skin one end, head is sling with brake clip (1), and the middle part connects before driving bar (5) and rear drive bar (7) head with axle (6).Screw in a brake ring (10) at axle skin one end, the outer spring formula lock ring (9) that is inserted in left-handed three all coileds of ring, two reverse saw profile of tooth terminations on its former and later two serration terminations and the forward and backward drive spindle galianconism are interlocked respectively.On radius stay, connect a locating dowel pin (4) then, it is folded between the two drive spindle heads, to limit its derotation with the one side riveting of drive spindle head corresponding position.At last brake cable is passed from the line transfer bolt (3) that is threaded onto the long-armed afterbody flanging of before driving bar, be fastened on the long-armed tail end of rear drive bar with lock beans (8).The lock core is with fuse-box (11) outward.

The main structure parameters that present embodiment adopts is:

1, lock ring: internal diameter is 40mm ± 1, and effectively cornerite 1078 ° ± 2 is counted about 19 radians.Its smallest cross-sectional 〉=12mm ², surface finish is higher than

7;

2, drive spindle: the ratio of doing back brake length arm be 3.5-4 than 1, do front brake and be 2.5-3 than 1, the monodentate smallest cross-sectional 〉=15mm on its galianconism ²

3, hardness number: brake ring superficial hardness HRA80-82, radius stay is logical to be HRC58 ± 1 firmly, spring formula lock ring is HRC46-48;

Below we in conjunction with the accompanying drawings to the working mechanism of this lock and relevant technical essential, be illustrated by performance:

After applying the handbrake, two drive spindle closures, lock ring is locked and embraces brake ring (10) firmly, because the restriction of locating dowel pin (4) is arranged, lock ring can not drive with revolving with brake ring, the friction of the two makes wheel decelerates.

After increasing the weight of the pulling force of brake cable, lock ring also can increase the weight of the coupling mechanism force of brake ring and the consequent brake ring rubbing power to lock ring thereupon, and the two reciprocal causation alternately increases, and directly causes wheel and draws tire.

After declutching, the deformation of lock ring bounce-back resets rapidly the lock body, and braking is released. The main performance of this lock Advantage is:

1, forces to move

The line pressure of this lock is removed mainly through the chain amplification of drive rod and lock ring and is produced because of the deformation of parts trace After the loss of giving birth to, be enough under standard test condition, make car body to produce the quiet tire braking square that drags of 160NM The hygrometric state of accessible 3-4m braking distance behind the balance various countries standard difference, it will be argued that this after tested It is a best retaining segment.

2, the even deceleration

Two pressurization links of this lock are all the geometric ratio supercharging of standard, thereby the emergency of pressurizeing all can Present a kind of uniform linear deceleration regime, very pliable and tough comfortable.

3, nuisanceless

This lock is all-metal construction, does not use asbestos;

Following measures have been adopted at this lock in the noise reduction: between the connector that transmits high pressure, all adopt To connecting or the mode of the company of subsides, with stress eliminating moment of torsion to greatest extent; Member to the lock core all gives firmly Change processing; In the vallecular cavity of brake ring and the involutory rear formation of fuse-box, fill up grease. Through this processing, the noise reduction effect Fruit is ideal.

4, fall to brake

After lock ring was locked, lock ring positioning end and live end can be with the rubbing direction of brake ring certainly The row transposition need not increase the equivalent bi-directional braking that any cost has just been finished this brake like this.

5, low internal resistance

This lock gives the unidirectional movingly gap of having established three to five between lock ring and brake ring; All The friction position coated grease; Between lock ring and drive rod galianconism, give the gap of having stayed 0.5mm, so that Lock ring can be adjusted automatically with the rotating deviation of brake ring morpheme, and the internal resistance of generation is little like this, fully can To allow the people ignore.

6, do front brake

This lock is done the braking of falling that front brake is equivalent to do back brake, and what need to adjust is, should be with drive rod Pressure ratio is down to 2.5 to 1 and is turned over before taking place when avoiding bringing to a halt to jump wheel.

7, endurance

Detect the wearing and tearing and the fatigue limit that show this lock and can reach at least 50,000 times, be enough to satisfy the lifelong brake needs of car body.

8, low cost

Six of the total workpieces of this lock, six of gauge members, assembling weight 165 ± 10g.All adopt homemade logical material, conventional processing.

Ben Zha compares with Yuan Zha because the spring formula lock ring that is coiled to form with the rectangle hand-drawn wire has replaced the spiral lock ring that combines with multi-disc blanking sheet, and whole lock consumable quantity lands vertically from 425g and is 273g, and material-saving surpasses 1/3rd, and materials only are half of traditional band-type brake.

Claims (8)

1, the miniature band-type brake of a kind of spring formula lock ring, it comprises line transfer bolt (3), brake clip (1), lock beans (8) and fuse-box (11), it is characterized in that:

With axle forward and backward drive spindle is linked to be a pincerlike structure on radius stay, its two galianconism and left-handed two to three weeks, the forward and backward termination of spring formula lock ring on brake ring mesh together respectively, and its two long-armed tail end connects together with brake cable;

In order to obtain best quiet brake torque, the radian value of the effective cornerite of this lock lock ring should be in line with after the lubricated attitude coefficient of static friction substitution Euler's formula between itself and gauge target pressure square, hard steel, the policy setting that effective transmission value of its result is 160 ± 10NM, the radial shrinkage that requires this setting value that spring formula lock ring tail end is produced simultaneously press and the ratio of head end tangential force less than the inverse of friction coefficient between lock ring and the brake ring.

2, band-type brake according to claim 1 is characterized in that:

The lock ring internal diameter is 40mm ± 1, and effectively cornerite is 1078 ± 2 °, about 19 radians, smallest cross-sectional 〉=12mm ², surface finish is higher than

3, band-type brake according to claim 1 is characterized in that:

On radius stay, connect a locating dowel pin (4), be folded between the two drive spindle heads with two drive spindle head corresponding position rivetings.

4, band-type brake according to claim 1 is characterized in that:

The ratio of the length arm of two drive spindles do back brake be 3.5-4 than 1, doing front brake is that 2.5-3 is than 1.

5, band-type brake according to claim 1 is characterized in that:

Hardness number: brake ring superficial hardness HRA80-82, radius stay is logical to be HRC58 ± 1 firmly, spring formula lock ring is logical to be HRC46-48 firmly.

6, band-type brake according to claim 1 is characterized in that:

In the vallecular cavity that the involutory back of brake ring (10) and fuse-box (11) forms, fill up grease.

7, band-type brake according to claim 1 is characterized in that:

Leave the 0.5mm gap between lock ring and the drive spindle galianconism.

8, band-type brake according to claim 1 is characterized in that:

Transmitting whole employing the between the high-voltage attaching parts to the mode that connects or subsides connect.

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