CN2690670Y

CN2690670Y - Clutch type speed reducer for electric wheelchair

Info

Publication number: CN2690670Y
Application number: CN 200420004347
Authority: CN
Inventors: 郑明权
Original assignee: Merits Health Products Co Ltd
Current assignee: Merits Health Products Co Ltd
Priority date: 2004-02-19
Filing date: 2004-02-19
Publication date: 2005-04-06
Anticipated expiration: 2014-02-19

Abstract

The utility model discloses a clutch type speed reducer for the electric wheelchair, comprising a main body installed on a vehicle frame. An upward opening is arranged in the main body, and a top cover which can be opened is arranged on the opening. A speed reducing gear mechanism installed in the main body is composed of a power shaft driven by an electric motor and a wheel shaft. A driving wheel which is driven with the power shaft perpendicularly is sheathed on the wheel shaft. An inner hook tooth is arranged in the inner side of the driving wheel, and the inner hook tooth is engaged with the outer side of the clutch gear. The inner side wall of the clutch gear can be slid with the wheel shaft in the shaft direction. The inner side wall of the clutch gear can accompany the matching type of the rotation. A driving lever which is used to toggle the clutch gear is sheathed on the top cover. A pushing control end with an inclined shape is formed utilizing the tail end of the driving lever. A shaft direction displacement is formed for the clutch gear between the rotations. The consequence whether the clutch gear is engaged with the driving wheel is generated, and the electromotive force loses the transmission relations of deviating from the power shaft and the wheel shaft. In the state of the free position, the external-pushing force makes the wheel shaft and the wheelchair of the wheel shaft moved favourably.

Description

The clutch type retarder of electric wheelchair

Technical field

The utility model is a kind of clutch type retarder of electric wheelchair, and it is involved in the technical field of vehicular traffic, refers to that especially the electrodynamic type retarder that electric wheelchair is installed has the clutch design, and the design makes in power losses, also can promote wheelchair smoothly.

Background technique

Electric wheelchair can be installed motor and reduction gears mechanism at the wheel shaft that links wheel, the electric power that sees through motor output is the transmission wheel via deceleration, the drive wheelchair advances, and this was announced 2003 on December 21,, the bulletin volume is 56803 No. six the novel patent case in " reducer structure of electric motor car " Taiwan (calling in the following text: with reference to case), a linking department is established on the reducer shell top in main system and vehicle frame links, the housing bottom is provided with group and establishes mouth, establish in mouth is installed on through group in order to members such as retarders, and establish in group and mouthful a capping to be set and to be sealed.

Yet, will organize with reference to case and to establish mouth and be arranged at the housing bottom, after the butter that adds or lubricated wet goods injected reducing gear, the gap leakage that oil stain can be established mouthful by capping and group caused the dirty of ground;

Especially, owing to only be that the electrical motor driven reducing gear drives wheel,, have to many people's carryings so in the electric power forfeiture, can't promote reducing gear transmission wheel with reference to the design of case, quite inconvenient.

The model utility content

Because the problem that the retarder that aforementioned electric wheelchair is suitable for still exists, the purpose of this utility model is the clutch type retarder of a kind of electric wheelchair of exploitation, provide anti-oil seepage in outside, and provide the clutch design to reducing gear, can be when making the electric power forfeiture in the smooth go-cart of neutral gear.

In order to realize aforesaid goal of the invention, the technological means that the utility model used ties up in the clutch type retarder that a kind of electric wheelchair is provided, and it comprises:

One can be installed in the body of vehicle frame, and this body openings is provided with a top cover in order to unlatching, sealing in opening up;

One reduction gear, this reduction gear is installed in the body, reduction gear comprises a pivot and is through at intrinsic line shaft, and one pivot be through at intrinsic wheel shaft, an and drive wheel that is set on the wheel shaft, this line shaft is provided with worm screw portion, the one section side's of being provided with pin section of this wheel shaft, install this drive wheel in the activity of adjacent side's pin section part, the outside wrom tooth that forms in order to orthogonal worm screw portion of this drive wheel, inner ring surface forms interior briar tooth;

One driving lever, this driving lever one end is positioned at outside the top cover, and the other end is for pushing away pin, and this pushes away pin and is threaded onto top cover with rotatable kenel and enters in the body, and this end that pushes away pin is the skewed control end that pushes away toward a side;

One clutch gear, this clutch gear one end forms tooth portion corresponding and the interior briar tooth engagement of drive wheel, this end is a hollow shape and form square croze with square pin section axial sliding fit in inwall, respective teeth portion other end forms supports shoulder, for pushing away the control end in contact is that it is stirred, control clutch gear and drive wheel mesh or do not mesh, between clutch gear and the body opposite end, in wheel shaft outside suit one elastic component.

The effect that the utility model can obtain is following listed:

1, the utility model is provided with clutch gear and driving lever, cooperating drive wheel and wheel shaft is the loose fit kenel, allows wheelchair in the electric power forfeiture, still can allow wheel and wheel shaft rotate by the strength that promotes wheelchair, still, make user's use selection more convenient in the smooth go-cart of neutral state.

2, during normality, the interior briar tooth engagement of clutch gear and drive wheel, drive wheel is meshed with worm screw portion by wrom tooth again, and dual flank engagement, transmission efficiency are more accurate and can significantly reduce noise.

3, body bottom be a sealing surface, and therefore the end face beginning injects lubricated machine oil for top cover sealing opening, and body does not have the slit makes its seepage in outer even pollute ground, exempts the follow-up trouble and the inconvenience of electric wheelchair use.

Description of drawings

Fig. 1 is disposed at the three-dimensional appearance schematic representation of vehicle frame for the utility model.

Fig. 2 is the utility model assembly three-dimensional exploded view.

Fig. 3 looks combination view on the utility model.

Fig. 4 is positioned at the assembled sectional view of line shaft power axle for the utility model driving lever.

Fig. 5 is positioned at the assembled sectional view that line shaft breaks away from wheel shaft for the utility model driving lever.

Embodiment

The utility model is a kind of clutch type retarder of electric wheelchair, please referring to Fig. 1, it comprises that one is installed in the body 10 of vehicle frame 60, and reduction gear is installed in body 10, and at body 10 driving levers 40 and one and the clutch gear 50 of reduction gear clutch is installed.

Further multiple by Fig. 1～3 explanation idiotopy position and member kenels thereof, wherein, this body 10 be opening 11 up, section is nearly ㄩ shape, opening 11 places are provided with a top cover 15 and cooperate the screw lock sealing, therefore just can avoid lubricating oil to leak out to ground, and this top cover 15 is provided with a counter sink 16, in this body 10 reduction gear is installed, and top cover 15 end faces and frame 60 locks of buying car in installments are established and linked;

This reduction gear comprises a pivot and is through at line shaft 21 in the body 10, and a pivot is through at the wheel shaft 30 in the body 10, and a drive wheel 35 that is set on the wheel shaft 30; Form worm screw portion 211 on this line shaft 21, one end passes body 10 places system and links driving with electric motor 20, and the 30 1 sections side's of being made as pin section 31 of wheel shaft, adjacent side's pin section 31 is to install this drive wheel 35 with the loose fit tolerance, wheel shaft 30 the other ends pass body 10 places system and link fixing with wheel 33, this drive wheel 35 ties up to outer ring surface and forms wrom tooth 351, and in order to the worm screw portion 211 of this line shaft 21 of orthogonal, the inner ring surface of drive wheel 35 then forms interior briar tooth 352;

This driving lever 40 comprises further that a sleeve 41 and fastens for sleeve 41 pushes away pin 43, push away that pin 43 is terminal to be the skewed control end 431 that pushes away toward sides, push away pin 43 and cross a pin 44 on the control end 431 pushing away, top cover 15 bottom surfaces are pin 44 positions relatively, be arranged with the short slot 17 of a setting circular arc scope, in order to control driving lever 40 rotational travel; When therefore making up, push away pin 43 and up pass top cover 15 by counter sink 16 bottom surfaces, driving lever 40 multiple utilizations push away pin 43 upper ends and wear a little spring 42, make it be pressed against counter sink 16, little spring 42 end in addition then is subjected to this and is sleeved on sleeve 41 bottom ends that push away on the pin 43 and compresses, and allows driving lever 40 whenever at positioning states, can both pull for the elastic-restoring force top of little spring 42, more can not dialled easily from, driving lever 40 utilizes pin 44 anti-thrust pin 43 to break away from outward; And

This clutch gear 50, please referring to Fig. 2, Fig. 4, clutch gear 50 1 ends form tooth portions 51 corresponding and drive wheel 35 interior briar tooth 352 engagements, this end is a hollow shape and in the internal face side of formation croze 52, form axial sliding fit with square pin section 31 with wheel shaft 30,51 other ends system of respective teeth portion forms the bigger anchor ring shape of external diameter and supports shoulder 53, support the contact of shoulder 53 positions system to be pushed away 431 groups of controls of control end, mesh or do not mesh with drive wheel 35 in order to push away control clutch gear 50, and between clutch gear 50 and body 10 opposite ends, at wheel shaft 30 outside suits one elastic component 55, but see through elastic component 55 pushing and pressing clutch gears 50 and returning quickly.

Use when implementing, as Fig. 1, Fig. 2, shown in Figure 4, when electric motor 20 keeps the normality output power, driving line shaft 21 utilizes the wrom tooth 351 of its worm screw portion this drive wheel 35 of 211 orthogonals to rotate, and briar tooth 352 meshes with the tooth portion 51 of clutch gear 50 in cooperating, clutch gear 50 rotates with wheel shaft 30 again, so line shaft 21 suffered power just see through clutch gear 50 live axles 30 and wheel 33 rotates, and electric wheelchair just can be walked automatically;

Otherwise, as Fig. 4, shown in Figure 5, if the power losses of electric motor 20, then rotatable driving lever 40, the inclination angle that pushes away 431 formation of control end with order is in rotating, push and shove to the shoulder 53 and to formation axial displacement, make clutch gear 50 slide and compression elastic piece 55 along square pin section 31, forms tooth portion 51 and break away from interior briar tooth 352, and drive wheel 35 is loose fit with wheel shaft 30 that wheel shaft 30 relative drive wheels 35 form the idle running of mutual noninterference, so user's control is beaten shelves to neutral gear, directly promote wheelchair (not shown in the figures), just drive wheel shaft 30 and wheel 33 rotational displacement thereof, easily promote to get final product by this Driving force;

When driving lever 40 is pushed back original position, the elastic-restoring force of elastic component 55 will urge to make clutch gear 50 along square pin section 31 axial displacements, and tooth portion 51 is snapped in the interior briar tooth 352, recover electric motor 20 live axles 30 and drive situations.

Claims

1. the clutch type retarder of an electric wheelchair is characterized in that it comprises:

One reduction gear, this reduction gear is installed in the body, reduction gear comprises a pivot and is through at intrinsic line shaft, and one pivot be through at intrinsic wheel shaft, an and drive wheel that is set on the wheel shaft, this line shaft is provided with worm screw portion, the one section side's of being provided with pin section of this wheel shaft, this drive wheel activity is installed on adjacent side's pin section part, and this drive wheel outside is formed with the wrom tooth in order to orthogonal worm screw portion, and inner ring surface is formed with interior briar tooth;

One clutch gear, this clutch gear one end is formed with tooth portion corresponding and the interior briar tooth engagement of drive wheel, this end is a hollow shape and be formed with square croze with square pin section axial sliding fit in inwall, it is that it stirs, controls clutch gear and drive wheel engagement or the out of mesh shoulder that supports that respective teeth portion other end is formed with for pushing away the control end in contact, between clutch gear and the body opposite end, be set with an elastic component in the wheel shaft outside.

2. the clutch type retarder of electric wheelchair as claimed in claim 1, it is characterized in that, described driving lever comprises that a sleeve and pushes away pin for what sleeve fastened, push away that pin is terminal to be the skewed control end that pushes away toward a side, push away pin and crossed a pin pushing away on the control end, the top cover bottom surface is sold the position relatively, be concaved with one in order to prevent that the thrust pin breaks away from the short slot of the setting circular arc scope of top cover, the pushing away pin of the corresponding driving lever of this top cover and be provided with a counter sink between counter sink interior edge face and the sleeve, is provided with a little spring.

3. the clutch type retarder of electric wheelchair as claimed in claim 1 is characterized in that, the described shoulder that supports is the ring plate shape.

4. the clutch type retarder of electric wheelchair as claimed in claim 1 is characterized in that, described top cover is locked on the body with bolt.