CN216876876U

CN216876876U - Power wheel damping mechanism of automatic wheelchair

Info

Publication number: CN216876876U
Application number: CN202122082446.1U
Authority: CN
Inventors: 徐国军
Original assignee: Hebei Ruilangde Medical Device Technology Group Co ltd
Current assignee: Hebei Ruilangde Medical Device Technology Group Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-07-05
Anticipated expiration: 2031-08-31

Abstract

The utility model belongs to the technical field of automatic wheelchair shock absorption, and discloses a power wheel shock absorption mechanism of an automatic wheelchair, which comprises a fixed frame, wherein a first support is fixedly arranged at the right end of the fixed frame, a front wheel is movably arranged at the bottom end of the right side of the first support, a driving wheel is fixedly arranged at the bottom of the fixed frame through a bearing, a power mechanism is arranged at the bottom of the fixed frame, a rear rod is fixedly arranged at the left side of the fixed frame, and a rear turnover prevention wheel is movably hinged at the bottom end of the rear rod. The rear turnover prevention wheel is provided with the rear rod and the rear turnover prevention wheel, so that the rear turnover prevention wheel is in contact with the ground to keep the integral balance of the fixing frame when the fixing frame wheelchair turns backwards, and the rear turnover prevention wheel is prevented.

Description

Power wheel damping mechanism of automatic wheelchair

Technical Field

The utility model belongs to the technical field of automatic wheelchair damping, and particularly relates to a power wheel damping mechanism of an automatic wheelchair.

Background

The automatic wheelchair is a self-powered wheelchair, a user can control the motor mounted on the wheelchair to start through the controller without using external force, and the automatic wheelchair can effectively save manpower and is popularized in a large scale at present by driving the driving wheels of the wheelchair to move through a series of transmission mechanisms.

The existing automatic wheelchair lacks good damping performance, is simple to use a spring for damping, but cannot eliminate the vibration amplitude generated by jolt, and simultaneously has no function of preventing backward overturning, once the automatic wheelchair moves too fast to move on an uphill section and backward overturning occurs, the consequence is unreasonable, so that the automatic wheelchair with the efficient damping mechanism is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a power wheel damping mechanism of an automatic wheelchair, which has the advantages of good damping effect and capability of preventing backward overturning.

In order to achieve the purpose, the utility model provides the following technical scheme: a power wheel damping mechanism of an automatic wheelchair comprises a fixed frame, a first bracket is arranged at the right end of the fixed frame, the bottom end of the right side of the first bracket is movably provided with a front wheel, the bottom of the fixed frame is fixedly provided with a driving wheel through a bearing, a power mechanism for driving the driving wheel is arranged at the bottom of the fixed frame, a rear rod is fixedly arranged at the left side of the fixed frame, the bottom end of the rear rod is movably hinged with a rear turnover prevention wheel, the right side of the fixing frame is fixedly provided with a limiting block, the front surface of the limiting block is provided with a limiting groove, the right end of the limiting block is hinged on the first bracket, a limiting post is movably arranged in the limiting groove, the end part of the limiting post is fixed on the second bracket, the bottom of the second support is fixed on the first support, and the top of the fixing frame and the left side of the second support are movably hinged to form a damping mechanism.

As a preferable technical scheme of the utility model, the top of the second bracket is fixedly provided with a push handle through a bolt, the push handle is in a 7-shaped shape and is used for pushing the whole wheelchair, the bolt is fixed in a manner that the push handle can be flexibly disassembled and assembled according to requirements, so that the universality of the wheelchair is further increased, and the second bracket is fixedly connected with the limiting column and is used for damping through hinging with a damping mechanism in the moving process of the wheelchair.

As a preferred technical scheme of the utility model, the damping mechanism comprises a damping column, a first telescopic rod and a second telescopic rod are movably sleeved in the damping column, a damping spring is movably sleeved in the damping column, two ends of the damping spring are respectively and fixedly connected with the first telescopic rod and the second telescopic rod, the other ends of the first telescopic rod and the second telescopic rod are respectively and movably hinged with a hinge block, the other ends of the two hinge blocks are respectively and fixedly connected with a fixed frame and a second bracket, when the wheelchair jolts, a person sitting on the wheelchair applies pressure to the second bracket, the second telescopic rod is stressed and moves towards the interior of the damping column and then rotates around the hinge block, the first telescopic rod also relatively moves towards the interior of the damping column and then simultaneously rotates around the hinge block, and the damping spring is compressed and absorbs energy generated during jolt, simultaneously, the bottom of No. two supports will drive spacing post and remove in the inside of spacing groove, reduce to jolt.

As a preferred technical scheme of the utility model, the limiting groove is in the shape of a sector round groove, the limiting column is movably mounted in the limiting groove, the limiting groove is used for limiting the second bracket and the limiting column, the second bracket drives the limiting column to move downwards when bumping, the energy is absorbed under the action of the damping mechanism, and the limiting column moves in the limiting groove, so that the bumping of the second bracket is reduced, and a certain limiting effect is also performed on the second bracket.

As a preferred technical scheme of the utility model, the power mechanism comprises a motor and a gear, the motor is fixedly mounted at the bottom of the fixing frame, the gear is fixedly mounted on an output shaft of the motor, the gear is meshed with an external gear in the middle of the driving wheel, the power mechanism drives the gear to rotate, and the gear drives the external gear on the outer surface in the middle of the driving wheel to be meshed and rotated, so that the driving wheel is driven to rotate, and the whole wheelchair has the capability of automatic movement.

As a preferred technical scheme of the utility model, the height value of the bottom of the outer surface of the anti-backward-overturning wheel is greater than the height value of the bottom of the outer surface of the driving wheel, when the bottom of the outer surface of the anti-backward-overturning wheel is in contact with the ground, the rear rod is vertical to the ground, when the wheelchair turns backwards, the front wheel is lifted off the ground, the anti-backward-overturning wheel is in contact with the ground to be turned backwards, the rear rod is vertical to the ground, the pressure of the anti-backward-overturning wheel after being grounded is increased, the ground gripping force of the anti-backward-overturning wheel is increased, and the stability of the wheelchair is improved.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model realizes the damping function and the backward turning prevention function of the automatic wheelchair by arranging the fixing frame, the first bracket, the rear rod, the backward turning prevention wheel, the damping mechanism, the second bracket, the limiting block, the limiting groove, the limiting column and the like, the first telescopic rod and the second telescopic rod are respectively hinged by the two hinging blocks, so that when bumping, the second bracket drives the first telescopic rod and the second telescopic rod to move in the damping column through the hinging blocks and compresses the damping spring to absorb the energy generated during bumping, meanwhile, the limiting column is driven to move in the limiting groove through the second bracket moving downwards to counteract the vertical floating generated by bumping, so that the whole vibration energy of the wheelchair is absorbed, and the backward turning prevention wheel is grounded to keep the whole balance of the fixing frame when the wheelchair of the fixing frame is turned backwards through the rear rod and the backward turning prevention wheel, prevent to turn over backward, this application has the effectual advantage that can prevent turning over backward of shock attenuation for prior art.

Drawings

FIG. 1 is a front cut-away schematic view of the structure of the present invention;

fig. 2 is a front sectional schematic view of the damper mechanism of the present invention.

In the figure: 1. a fixed mount; 2. a first bracket; 3. a front wheel; 4. a driving wheel; 5. a rear bar; 6. preventing backward wheel turning; 7. a damping mechanism; 71. a shock-absorbing post; 72. a first telescopic rod; 73. a second telescopic rod; 74. A hinged block; 75. a damping spring; 8. a second bracket; 81. a push handle; 9. a power mechanism; 10. a limiting block; 11. a limiting groove; 12. a limiting column.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in fig. 1 to 2, the utility model provides a power wheel damping mechanism of an automatic wheelchair, which comprises a fixed frame 1, wherein a first bracket 2 is arranged at the right end of the fixed frame 1, a front wheel 3 is movably arranged at the bottom end of the right side of the first bracket 2, a driving wheel 4 is fixedly arranged at the bottom of the fixed frame 1 through a bearing, a power mechanism 9 for driving the driving wheel 4 is arranged at the bottom of the fixed frame 1, a rear rod 5 is fixedly arranged at the left side of the fixed frame 1, a rear turnover prevention wheel 6 is movably hinged at the bottom end of the rear rod 5, a limiting block 10 is fixedly arranged at the right side of the fixed frame 1, a limiting groove 11 is arranged at the front of the limiting block 10, the right end of the limiting block 10 is hinged on the first bracket 2, a limiting column 12 is movably arranged inside the limiting groove 11, the end part of the limiting column 12 is fixed on a second bracket 8, the bottom of the second bracket 8 is fixed on the first bracket 2, the top of the fixed frame 1 and the left side of the second bracket 8 are movably hinged with a damping mechanism 7.

Wherein, there is pushing away handle 81 at the top of No. two supports 8 through bolt fixed mounting, and the shape that pushes away handle 81 is "7" shape, and pushing away handle 81 and being responsible for pushing away whole wheelchair, and the form of bolt fastening makes it can be as required go on nimble must dismantle and install for the commonality of wheelchair further increases, and at the in-process that the wheelchair removed, No. two supports 8 are responsible for and carry out the shock attenuation with spacing post 12 fixed connection and through the articulated with damper 7.

Wherein, the damping mechanism 7 comprises a damping column 71, a first telescopic rod 72 and a second telescopic rod 73 are movably sleeved inside the damping column 71, a damping spring 75 is movably sleeved inside the damping column 71, two ends of the damping spring 75 are respectively fixedly connected with the first telescopic rod 72 and the second telescopic rod 73, the other ends of the first telescopic rod 72 and the second telescopic rod 73 are respectively and movably hinged with a hinge block 74, the other ends of the two hinge blocks 74 are respectively and fixedly connected with the fixed frame 1 and the second bracket 8, when the wheelchair encounters jolt, a person sitting on the wheelchair applies pressure to the second bracket 8, the second telescopic rod 73 is stressed and moves towards the inside of the damping column 71 and then rotates around the hinge block 74, the first telescopic rod 72 also moves towards the inside of the damping column 71 and then simultaneously rotates around the hinge block 74, at the moment, the damping spring 75 is compressed and absorbs energy generated during jolt, meanwhile, the bottom end of the second bracket 8 drives the limiting column 12 to move in the limiting groove 11, so that bumping is reduced.

Wherein, the shape of spacing groove 11 is fan-shaped circular slot shape, and spacing post 12 movable mounting is in spacing groove 11, and spacing groove 11 is responsible for spacing No. two supports 8 and spacing post 12, and No. two supports 8 drive spacing post 12 downstream when meeting with jolting, absorbs the energy under damper 7's effect, and spacing post 12 then removes in the inside of spacing groove 11, reduces jolting of No. two supports 8 on the one hand, also carries out certain limiting displacement to No. two supports 8 simultaneously.

The power mechanism 9 comprises a motor and a gear, the motor is fixedly installed at the bottom of the fixing frame 1, the gear is fixedly installed on an output shaft of the motor, the gear is meshed with an outer gear in the middle of the driving wheel 4, the power mechanism 9 drives the gear to rotate, the gear drives an outer gear on the outer surface in the middle of the driving wheel 4 to be meshed and rotated, and therefore the driving wheel 4 is driven to rotate, and the whole wheelchair has the capability of automatic movement.

The height value of the bottom of the outer surface of the rear turnover prevention wheel 6 is larger than the height value of the bottom of the outer surface of the driving wheel 4, the bottom of the outer surface of the rear turnover prevention wheel 6 is in contact with the ground, the rear rod 5 is perpendicular to the ground, when the wheelchair turns over backwards, the front wheel 3 is lifted off, the rear turnover prevention wheel 6 is in contact with the ground to be placed in a rear turnover mode, the rear rod 5 is perpendicular to the ground, the pressure of the rear turnover prevention wheel 6 after contacting with the ground is increased, the ground grabbing force of the rear turnover prevention wheel 6 is increased, and the stability of the wheelchair is improved.

The working principle and the using process of the utility model are as follows:

when bumping occurs, the second bracket 8 moves downwards due to inertia, at the moment, the second expansion link 73 is driven to move downwards through the hinge block 74 and move towards the inside of the shock absorption column 71, the first expansion link 72 moves towards the inside of the shock absorption column 71 through the hinge block 74, the first expansion link 72 and the second expansion link 73 move oppositely and compress the shock absorption spring 75 to absorb energy generated during bumping, and the second bracket 8 moving downwards drives the limiting column 12 to move in the limiting groove 11 to counteract up-and-down floating generated by bumping;

when backward overturning is about to occur, the rear rod 5 and the backward overturning preventing wheel 6 in the front wheel 3 start to move, then the backward overturning preventing wheel 6 starts to touch the ground, and the wheelchair stops backward overturning.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an automatic power wheel damper of wheelchair, includes mount (1), the right-hand member of mount (1) is equipped with support (2) No. one, support (2) right side bottom movable mounting has front wheel (3), its characterized in that: the bottom of the fixed frame (1) is fixedly provided with a driving wheel (4) through a bearing, the bottom of the fixed frame (1) is provided with a power mechanism (9) for driving the driving wheel (4), a rear rod (5) is fixedly arranged on the left side of the fixed frame (1), the bottom end of the rear rod (5) is movably hinged with a rear turnover prevention wheel (6), a limiting block (10) is fixedly arranged on the right side of the fixing frame (1), a limiting groove (11) is arranged on the front side of the limiting block (10), the right end of the limiting block (10) is hinged on the first bracket (2), a limiting column (12) is movably arranged in the limiting groove (11), the end part of the limit column (12) is fixed on the second bracket (8), the bottom of the second bracket (8) is fixed on the first bracket (2), the top of the fixed frame (1) is movably hinged with a damping mechanism (7) on the left side of the second bracket (8).

2. The power wheel damper mechanism of an automatic wheelchair as claimed in claim 1, wherein: the top of the second bracket (8) is fixedly provided with a push handle (81) through a bolt, and the push handle (81) is 7-shaped.

3. The power wheel damper mechanism of an automatic wheelchair as claimed in claim 1, wherein: damper (7) are including shock absorber post (71), telescopic link (72) and No. two telescopic links (73) have been cup jointed in the inside activity of shock absorber post (71), damping spring (75) both ends respectively with telescopic link (72) and No. two telescopic link (73) fixed connection, the equal movable hinge of the other end of telescopic link (72) and No. two telescopic link (73) has articulated piece (74), two the other end of articulated piece (74) respectively with mount (1) and No. two support (8) fixed connection.

4. The power wheel damper mechanism of an automatic wheelchair as claimed in claim 1, wherein: the limiting groove (11) is in the shape of a sector circular groove, and the limiting column (12) is movably arranged in the limiting groove (11).

5. The power wheel damper mechanism of an automatic wheelchair as claimed in claim 1, wherein: the power mechanism (9) comprises a motor and a gear, the motor is fixedly installed at the bottom of the fixing frame (1), the gear is fixedly installed on an output shaft of the motor, and the gear is meshed with an external gear in the middle of the driving wheel (4).

6. The power wheel damper mechanism of an automatic wheelchair as claimed in claim 1, wherein: the height value of the bottom of the outer surface of the rear turnover prevention wheel (6) is larger than that of the bottom of the outer surface of the driving wheel (4), and when the bottom of the outer surface of the rear turnover prevention wheel (6) is in contact with the ground, the rear rod (5) is perpendicular to the ground.