CN202935093U

CN202935093U - Barrier-free trundle

Info

Publication number: CN202935093U
Application number: CN 201220704922
Authority: CN
Inventors: 张洪汛; 勾频; 金贵林
Original assignee: Wuhan University of Science and Engineering WUSE
Current assignee: Wuhan University of Science and Engineering WUSE
Priority date: 2012-12-19
Filing date: 2012-12-19
Publication date: 2013-05-15
Anticipated expiration: 2022-12-19

Abstract

The utility model relates to a barrier-free trundle. The technical scheme includes that a wheel (4) on a wheel frame (1) is supported by a wheel shaft (6), a balance wheel shaft (3) is arranged on the wheel frame (1), the balance wheel shaft (3) is used for supporting a balance wheel (5) and a torsion spring (2), according to the balance wheel (5), a section of an arc length is adopted, wherein the curvature radius of the arc length is larger than the radius of the wheel (4), the balance wheel (5) is installed on the balance wheel shaft (3) so as to ensure that when the wheel works, the bottom edge of a working arc of the balance wheel is higher than a ground plane of the wheel (4), and the bottom edge of the working arc of the balance wheel is lower than one second of the radium of the wheel (4) below the wheel shaft (6), namely the distance between the bottom edge of the working arc of the balance wheel and the ground is not larger than one second of the radium of the wheel, and the balance wheel (5) is arranged in the middle of the wheel (4) when the wheel (4) is of a double-wheel structure or on two sides of the wheel (4) when the wheel (4) is of a single-wheel structure. The barrier-free trundle is simple in structure and is capable of overcoming barriers. When the barrier-free trundle is used in manual operation vehicles such as small flat cars, baby carriages, mopeds, wheelchairs, passage performance of the manual operation vehicles can be improved.

Description

A kind of accessible trundle

Technical field

The utility model belongs to the wheel technical field.Be specifically related to a kind of wheel assembly for obstacle negotiation.

Background technology

In the process of moving, when the obstacle in the place ahead of travelling approaches the axletree height, wheel breaks the barriers because of the excessive method of the vertical dimension of obstacle vehicle.Existing wheel generally can only be by highly being less than the obstacle of radius of wheel 1/2nd, the wheel of hand barrow is even met and highly is less than radius of wheel even 1/3rd obstacle is also by difficulty, and this greatly has influence on the range of use that passes through performance and vehicle of wheel.

The diameter that passes through performance and wheel of existing wheel is proportional, wheel diameter is larger, the ability of wheel energy obstacle negotiation is stronger, wheel to pass through performance better, but the diameter of wheel can not infinitely increase, wheel diameter increase meeting brings the increase of weight, height and center of gravity to vehicle, the stability of vehicle and light and flexible decline, excessive wheel diameter also be not suitable for small-sized, gently make and the low vehicle of center of gravity uses, particularly in the use of hand push vehicle.Select the wheel of small diameter to reducing vehicle's center of gravity, reducing vehicle weight and increasing vehicle stability has suitable, therefore all be widely used the wheel of small diameter at small-sized light-duty vehicle and hand push vehicle, as manual Flat car wheel, travelling aided bicycle wheel and wheelchair front vehicle wheel etc., but these vehicles are owing to adopting existing minor diameter wheel, because it is only suitable for travelling than smooth-riding surface by poor-performing, if run into some steps in travelling, during the rugged obstacle such as door and ditch, the minor diameter wheel can can't pass through because of relatively high being obstructed of obstacle, cause the crossing ability of these vehicles to reduce, have influence on the Vehicle Driving Cycle effect and the field of application that use existing wheel.

Summary of the invention

The utility model is intended to overcome the prior art defect, and purpose is to provide a kind of simple in structure and minor diameter wheel that can obstacle negotiation, to improve the performance of passing through of minor diameter wheel.

For achieving the above object, the technical solution adopted in the utility model is: the wheel on vehicle wheel frame, by axle bearing, separately is provided with a balancing arbor supporting escapement and reverses spring on vehicle wheel frame.

Described escapement adopts radius of curvature to be greater than one section arc length of radius of wheel, escapement is arranged on balancing arbor, while guaranteeing wheel work, the root edge of escapement work arc will be higher than the ground plane of wheel, the root edge of escapement work arc will be lower than 1/2nd radius of wheel below wheel shaft, and overhead distance is no more than 1/2nd of radius of wheel.

Described escapement is arranged in centre or the escapement that wheel is two-wheel and is arranged in the two sides that wheel is single-wheel.

Owing to adopting such scheme, the utility model adopts by the small diameter wheel and travels and the theory structure of large radian escapement obstacle negotiation, the work radian of escapement is in all the time the front semicircle place of wheel and exceeds the first half wheel of wheel, when a relatively large obstacle is met in wheel the place ahead, escapement work forearc wheel rim first contacts with obstacle, be equivalent to the big wheel obstacle negotiation, now escapement rotates around balancing arbor under the effect of vehicle thrust, wheel moves ahead with vehicle and lifts, when the escapement work arc contacted with obstacle turns to while contacting with wheel, obstacle contacts with the wheel leading edge of raising with vehicle, and will to the contact point of obstacle, be transitioned on wheel, this process is equivalent to reduce the relative height of obstacle and wheel, reduced the resistance of obstacle to wheel, improve wheel and pass through performance.Because the lower edge of escapement work arc will be higher than the earth point of wheel, the assurance wheel can not produce and interfere with the escapement edge when flat pavement running.

In order to reduce the scantling of structure of escapement, it is the work arc that escapement adopts one section arc of non-circular structure, for the work arc that the guarantees escapement front semicircle in wheel all the time when not working, the front wheel felloe of work arc will surpass the leading edge of wheel, the torsion spring is housed on balancing arbor and makes escapement preposition, to guarantee that first touching obstacle is escapement.

Therefore, the utlity model has simple in structure, under the condition that changes the wheel setting height(from bottom), improve the ability of wheel obstacle negotiation.

The accompanying drawing explanation

Figure l is a kind of structural representation of the present utility model;

The cutaway view that Fig. 2 is Fig. 1.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the utility model being further described, is not the restriction to its protection domain:

A kind of accessible trundle, its structure as depicted in figs. 1 and 2: the wheel [4] on vehicle wheel frame [1], by wheel shaft [6] supporting, separately is provided with a balancing arbor [3] supporting escapement [5] and torsion spring [2] on vehicle wheel frame [1].

As shown in Figure 1, escapement [5] adopts radius of curvature to be greater than one section arc length of wheel [4] radius, escapement [5] is arranged on balancing arbor [3], while guaranteeing wheel work, the root edge of escapement work arc will be higher than the ground plane of wheel [4], the root edge of escapement work arc will be lower than following 1/2nd wheels [4] radius of wheel shaft [6], and overhead distance is no more than 1/2nd of radius of wheel.

As shown in Figure 2, escapement [5] is arranged in wheel [4] and is arranged in wheel [4] for the two sides of single-wheel for the centre of two-wheel or escapement.

In this specific embodiment: minor diameter wheel [4] travels and the theory structure of large radian escapement [5] obstacle negotiation, the work radian of escapement [5] is in all the time the front semicircle place of wheel [4] and exceeds the first half wheel of wheel [4], when a relatively large obstacle is met in wheel the place ahead, escapement [5] work forearc wheel rim first contacts with obstacle, be equivalent to the big wheel obstacle negotiation, now escapement [5] rotates around balancing arbor [3] under the effect of vehicle thrust, wheel [4] moves ahead with vehicle and lifts, when the escapement contacted with obstacle [5] work arc turns to wheel [4] while contacting, obstacle contacts with the wheel of raising with vehicle [4] leading edge, and will be transitioned into the contact point of obstacle on wheel [4], this process is equivalent to reduce the relative height of obstacle and wheel, reduced the resistance of obstacle to wheel, improve wheel and pass through performance.Because the lower edge of escapement [5] work arc will be higher than the earth point of wheel [4], assurance wheel [4] can not produce and interfere with escapement [5] when flat pavement running.

In this specific embodiment: in order to reduce the scantling of structure of escapement [5], it is the work arc that escapement [5] adopts one section arc of non-circular structure, for the work arc that guarantees escapement [5] the front semicircle in wheel [4] all the time when not working, the front wheel felloe of work arc will surpass the leading edge of wheel, torsion spring [2] is housed on balancing arbor [3] and makes escapement [5] preposition, to guarantee that first touching obstacle is escapement [5].

Therefore, this specific embodiment has wheel simple in structure and energy obstacle negotiation performance, is used in the hand-propelled vehicles such as truck, perambulator, travelling aided bicycle and wheel-chair, to increase the trafficability energy.

Claims

1. an accessible trundle, is characterized in that, the upper wheel [4] of vehicle wheel frame [1], by wheel shaft [6] supporting, is provided with a balancing arbor [3] supporting escapement [5] and reverses spring [2] on vehicle wheel frame [1].

2. a kind of accessible trundle according to claim 1, it is characterized in that escapement [5] adopts radius of curvature to be greater than one section arc length of wheel [4] radius, escapement [5] is arranged on balancing arbor [3], while guaranteeing wheel work, the root edge of escapement work arc will be higher than the ground plane of wheel [4], the root edge of escapement work arc will be lower than following 1/2nd wheels [4] radius of wheel shaft [6], and overhead distance is no more than 1/2nd of radius of wheel.

3. a kind of accessible trundle according to claim 1, is characterized in that escapement [5] is arranged in wheel [4] and is arranged in wheel [4] for the two sides of single-wheel for the centre of two-wheel or escapement [5].