CN201619655U

CN201619655U - Gravity-type brake of electric bicycle

Info

Publication number: CN201619655U
Application number: CN2009202010835U
Authority: CN
Inventors: 叶森
Original assignee: YE ER
Current assignee: YE ER
Priority date: 2009-11-30
Filing date: 2009-11-30
Publication date: 2010-11-03
Anticipated expiration: 2019-11-30

Abstract

The utility model discloses a gravity-type brake of an electric bicycle, which can depend on the frictional force caused by the gravity of the electric bicycle , while the existing brake of the electric bicycle depends on the frictional force caused by the gripping force of hands. The gravity-type brake is arranged on the periphery of the rear wheel. In the technical scheme, a friction piece is of a wedge shape and is arranged in front of the rear wheel, the circular hole of the friction piece is sleeved on a cross shaft and can swing around the cross shaft, the cross shaft is tightly assembled with two rotating arms to form a mounting frame, and the mounting frame is hooked on the wheel shaft of the rear wheel from the two sides of the rear wheel and can drive the friction piece to rotate around the wheel shaft of the rear wheel. The brake cable can be loosened and tightened to control the separation and clinging of the friction piece and the rear wheel. During emergency braking, the brake cable pulls the friction piece so that the friction piece clings to the rear wheel and is driven by the rolling rear wheel to move into the space between the rear wheel and the road surface, thereby generating the frictional force against the road surface. The pressure exerted on the friction piece is equal to the sum of the dead weight of the bicycle and the weight loaded on the bicycle, therefore, the efficiency of the gravity-type brake is one order of magnitude higher than the grip type brake.

Description

The gravity-type brake gear that is used for Electrical Bicycle

Technical field

The utility model relates to a kind of brake gear of Electrical Bicycle, and its friction force is by the gravity of Electrical Bicycle self.

Background technology

The brake gear of existing Electrical Bicycle has been continued to use the pattern of bicycle purely, promptly relies on the grip of finger, by brake cable, power is passed to brake facing, reaches the purpose of braking.This class brake can be summed up as the brake of grip type.Because Electrical Bicycle is conducted oneself with dignity and load carrying ability is big, speed is high, the brake of grip type is difficult to reach at this brakes purpose fast and effectively.Produce hidden danger thus, also restricted the potentiality performance of Electrical Bicycle simultaneously, as: limited the increase (will increase) of the additional equipment of Electrical Bicycle, limited its speed of a motor vehicle from heavy load, and its load carrying ability etc.

Summary of the invention

In order to overcome the situation of existing Electrical Bicycle brake efficiency difference, the utility model provides a kind of brand new brake scheme, it no longer with the grip of finger as the generation source of drag friction power but use the generation source of the gravity of battery-driven car self as friction force, thereby can produce enough friction force, reach the urgent braking effect of actv..

The technical scheme in the invention for solving the technical problem is: be provided with the wedge shape friction member of a band circular hole before the trailing wheel of Electrical Bicycle, the circular hole string is on the transverse axis of erecting frame, and friction member can be swung around transverse axis.Erecting frame also has a pair of pivoted arm, extends back from the two ends of transverse axis, until be enclosed within on the wheel shaft of trailing wheel.Friction member can rotate around the wheel shaft of trailing wheel again together with erecting frame like this, for the angle control of this rotation within the specific limits, has spacing drag-line to be connected to the front portion of car body from transverse axis.By the brake cable that the Electrical Bicycle brake crank attracts, its cover tube terminal is fixed on the pivoted arm, and its wire is fixed on the handle of friction member.

When Electrical Bicycle was advanced, friction member separated with trailing wheel, and trailing wheel can rotate smoothly.When doing emergency brake, brake cable drawing friction spare makes it to be close to trailing wheel, and is driven the below of trailing wheel rapidly by trailing wheel.Because the qualification of spacing drag-line, friction member just is embedded between wheel and the road surface all the time.The inertia of Electrical Bicycle just is braked because of friction member and ground-surface friction like this.Computing formula according to friction force, the size of friction force equals friction coefficient and multiply by positive pressure, friction member is wiped part mutually with the road surface and is adopted the bigger high-abrasive material of friction coefficient to make, and positive pressure is exactly the gravity that the Electrical Bicycle trailing wheel is carried---and this is the bearing point of the main weight of Electrical Bicycle.The only several at most kilograms of the power of pulling of finger, and the gravity of trailing wheel carrying has tens kilograms at least, uses Electrical Bicycle gravity to brake, its effect is apparent.When the manned loading of Electrical Bicycle, inertia increases, and the brake difficulty also just strengthens, and has also strengthened yet trailing wheel puts on the power of friction member, and the required friction force that brakes also just in time strengthens synchronously.

The beneficial effects of the utility model are: the grip type brake gear height that the braking effect of gravity-type brake gear compares an order of magnitude, it will effectively solve the difficult problem of existing Electrical Bicycle braking effect difference.

Description of drawings

Accompanying drawing has provided a specific embodiment of the present utility model.The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is integral structure figure of the present utility model.

Fig. 2 is the block diagram of major part.

Fig. 3 is the state of pulling after the brake cable one.

Fig. 4 is the state of pulling after the brake cable two.

1 is the road surface in the drawings, the 2nd, the trailing wheel of Electrical Bicycle, the 3rd, the wheel shaft of trailing wheel, the 4th, the vehicle frame of Electrical Bicycle, the 5th, the wedge shape friction member, the 6th, the transverse axis of erecting frame, the 7th, the pivoted arm of erecting frame, the 8th, erecting frame reset tension spring, the 9th, the brake cable spring, the 10th, brake cable sleeve pipe, the 11st, brake cable steel wire, the 12nd, spacing drag-line.

The specific embodiment

A pair of pivoted arm (7) links to each other with transverse axis (6) close-fitting, constitutes erecting frame.The other end of pivoted arm (7) is enclosed within the two ends of the wheel shaft (3) of trailing wheel, and seal with known fastener in its outside, makes erecting frame rotate can not deviate from again around wheel shaft (3).The circle hole sleeve of friction member (5) and is clipped between two pivoted arms (7) on transverse axis (6), and friction member (5) can be around transverse axis (6) swing, and Fig. 2 is their block diagram.

In Fig. 1, (8) one of erecting frame reset tension springs catch on vehicle frame (4), and one is caught on pivoted arm (7), make erecting frame be in the position of close vehicle frame (4) at ordinary times.

The brake cable that attracts by the Electrical Bicycle handgrip, the terminal of its brake cable sleeve pipe (10) is fixed on the pivoted arm (7), brake cable steel wire (11) is fixed on the friction member (5), between have brake cable spring (9) to strut, make friction member (5) and trailing wheel (2) composition from state.

When starting brake, brake cable steel wire (11) shrinks, and friction member (5) is furthered and is close to trailing wheel (2), sees Fig. 3.Spacing drag-line (12) is connected on the transverse axis (6) from the Electrical Bicycle Vehicular body front, and its length is displaced under the trailing wheel with friction member (5), when being embedded in the middle of road surface (1) and the trailing wheel (2), just tightening and is as the criterion, and sees Fig. 4.

Advancing trailing wheel this moment (2) reaches the erecting frame that is made of pivoted arm (7) and transverse axis (6) with friction member (5) and rotates around wheel shaft (3), and in the middle of friction member (5) was embedded in road surface (1) and trailing wheel (2), spacing drag-line this moment (12) was just tightened.So trailing wheel (2) is slightly lifted, the inertia of Electrical Bicycle is braked by the friction force between friction member (5) and road surface (1), sees Fig. 4.

Brake off is by the pulling force of reset tension spring (8), just in case friction member (5) by trailing wheel (2) and road surface (1) armful too dead, need only trailing wheel (2) fallen and be exactly.

The usefulness that the suitable urgency of making Electrical Bicycle of the utility model is stopped can cooperate usefulness as the brake of rising with existing brake gear, and the usefulness of deceleration is made in the brake of rising, and is controlled by the right hand.And anxious usefulness of stopping is made in the gravity-type brake, is controlled by left hand.Such operating mode is consistent with existing common mode.

Claims

1. the brake gear of an Electrical Bicycle, it is characterized in that: this device places the periphery of trailing wheel: friction member (5) wedgewise, place trailing wheel the place ahead, its circular hole string is gone up and can be swung around transverse axis (6) at transverse axis (6), transverse axis (6) becomes erecting frame with two pivoted arms (7) close-fitting, collude on the wheel shaft (3) that is suspended to trailing wheel from the trailing wheel both sides, and can be with friction member (5) to rotate around rear axle (3).

2. the brake gear of Electrical Bicycle according to claim 1 is characterized in that: (8) one of reset tension springs collude on the vehicle frame (4) at Electrical Bicycle, and one is colluded on pivoted arm (7), after finishing brake, erecting frame retracted original position.

3. the brake gear of Electrical Bicycle according to claim 1, it is characterized in that: the brake cable that attracts by the Electrical Bicycle handgrip, the terminal of its brake cable sleeve pipe (10) is fixed on the pivoted arm (7), brake cable steel wire (11) is fixed on the friction member (5), between have brake cable spring (9) to strut, make friction member (5) and trailing wheel (2) composition from state, in case the tension brake cable, friction member (5) will be adjacent to trailing wheel.

4. the brake gear of Electrical Bicycle according to claim 1, it is characterized in that: spacing drag-line (12) is connected on the transverse axis (6) from the Electrical Bicycle Vehicular body front, its length is displaced under the trailing wheel with friction member (5), when being embedded in the middle of road surface (1) and the trailing wheel (2), just tightening and is as the criterion.