CN113397846A

CN113397846A - Chair with automatic braking function

Info

Publication number: CN113397846A
Application number: CN202110816307.9A
Authority: CN
Inventors: 黄建军; 单志华; 张水红; 王菊; 张志娟; 王芳
Original assignee: Anhui Jinbaoma Furniture Group Co ltd
Current assignee: Anhui Jinbaoma Furniture Co.,Ltd.
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2021-09-17
Anticipated expiration: 2041-07-19
Also published as: CN113397846B

Abstract

The invention belongs to the field of furniture, and particularly relates to a chair with an automatic braking function, which aims at solving the problems that the conventional wheelchairs generally have no braking system, a small number of wheelchairs are provided with braking systems, the braking systems generally cannot automatically brake, the safety of people cannot be guaranteed when the wheelchairs move too fast, and the functions of users are simple. The wheelchair is simple to operate and convenient to use, can ensure that the wheelchair is more comfortable and safe when in use, is suitable for people with different weights, and is convenient for people to use.

Description

Chair with automatic braking function

Technical Field

The invention relates to the technical field of furniture, in particular to a chair with an automatic braking function.

Background

Wheelchairs are chairs equipped with wheels to help replace walking and are classified into electric and manual folding wheelchairs. The wheelchair is an important moving tool for home rehabilitation, turnover transportation, treatment and outgoing activities of wounded persons, patients and disabled persons, not only can meet the requirements of physical disabilities and mobility-handicapped persons for riding instead of walk, but also is more important to facilitate the family members to move and take care of the patients, so that the patients can carry out physical exercise and participate in social activities by means of the wheelchair, the wheelchair is very important to the life of the people who are inconvenient to walk, and a good wheelchair can bring much moving fun for the people who are inconvenient to walk.

The existing wheelchairs are generally not provided with a brake system, a small number of wheelchairs are provided with the brake system, the brake systems generally cannot automatically brake, the safety of people cannot be guaranteed when the wheelchairs move too fast, and the functions of users are simple.

Disclosure of Invention

The invention aims to solve the defects that the existing wheelchairs generally have no brake system, a small number of wheelchairs are provided with the brake system, the brake systems generally cannot automatically brake, the safety of people cannot be guaranteed when the wheelchairs move too fast, and the functions of users are simple, and provides a chair with an automatic brake function.

In order to achieve the purpose, the invention adopts the following technical scheme:

a chair with an automatic brake function comprises a seat plate, wherein a backup plate is fixedly mounted at the top of the seat plate, two symmetrically arranged handrails are fixedly mounted at the top of the seat plate, a control switch is arranged on each handrail, a shell is fixedly mounted at the bottom of the seat plate, a rotating shaft is rotatably mounted on the shell, positioning plates are fixedly mounted at two ends of the rotating shaft, a plurality of supporting strips are annularly and slidably connected on the positioning plates, the same roller is rotatably mounted on the plurality of supporting strips, a buffer mechanism is arranged between the roller and the positioning plates, a controller is fixed on the inner wall of the top of the shell through bolts, a brake mechanism is arranged on the rotating shaft, a fixing plate is fixedly mounted on the inner wall of the shell, a plurality of top springs are fixedly mounted at the bottom of the fixing plate, a driving motor is fixed on the inner wall of the bottom of the shell through bolts, and a transmission rod is fixedly mounted on an output shaft of the driving motor, the brake mechanism comprises annular rubber gaskets, a brake disc, moving blocks, a push plate and hinge rods, wherein the two annular rubber gaskets are fixedly arranged on the inner walls of the two sides of the shell respectively, the brake disc is slidably arranged on a rotating shaft, the two moving blocks are movably sleeved on the rotating shaft, the brake disc is positioned between the moving blocks and the annular rubber gaskets on the same side, the push plate is fixedly connected with a plurality of top springs and is in threaded connection with the transmission rod, the two hinge rods are rotatably arranged at the bottom of the push plate and are rotatably connected with the corresponding moving blocks, the rotating transmission rod can drive the push plate to move through threaded connection with the push plate, and the push plate drives the two moving blocks to transversely move through the hinge rods, and then the brake disc is pushed to be in contact with the annular rubber gasket, so that the brake disc is braked.

Preferably, buffer gear includes annular cushion chamber and piston plate, annular cushion chamber sets up on the locating plate, and be the annular on annular cushion chamber's the outside inner wall and seted up a plurality of dashpots, dashpot and the piston plate sliding connection that corresponds, and piston plate and the support bar fixed connection that corresponds, sliding connection has annular clamp plate in the annular cushion chamber, one side fixed mounting of annular clamp plate has the screw rod that four symmetries set up, the outside thread bush of screw rod is equipped with the gear, the gear rotates with the locating plate to be connected, the ring gear is installed in one side rotation of locating plate, ring gear and four gear intermeshing, pivoted ring gear is through with gear intermeshing, thereby can drive the screw rod and remove, and then extrude in the annular cushion chamber through annular clamp plate, make atmospheric pressure increase in the annular cushion chamber, and then increase the buffering dynamics.

Preferably, drive mechanism includes worm and worm wheel, worm fixed mounting is on the transfer line, worm wheel fixed mounting is in the pivot, and worm wheel intermeshing, the outside of pivot is equipped with the ratchet, two fixed slots have been seted up on the inner wall of worm wheel, sliding connection has the wedge kelly on the inner wall of fixed slot, the wedge kelly is mutually supported with the ratchet, and the one end fixed mounting of wedge kelly has supporting spring, supporting spring's one end and the inner wall fixed connection of fixed slot, forward pivoted transfer line can drive the pivot through the intermeshing of worm and worm wheel and rotate, and then remove through locating plate and gyro wheel drive arrangement, when transfer line antiport, because the mutually supporting of ratchet and wedge kelly, thereby can make the pivoted worm wheel can not drive the pivot and rotate, and then make the pivot lose power.

Preferably, fixed mounting has the connecting block on the brake disc, the sliding hole has been seted up on the connecting block, sliding hole and pivot sliding connection, one side fixed mounting of connecting block has the connecting plate, the connecting plate passes through the bearing with the movable block that corresponds and rotates and be connected, the spacing groove has all been seted up on the top inner wall of sliding hole and the bottom inner wall, sliding connection has the stopper in the spacing groove, stopper and pivot fixed connection, wedge groove has all been seted up to one side that two brake discs kept away from each other, wedge groove and the annular rubber gasket that corresponds mutually support, the movable block that removes promotes wedge groove on the brake disc through the connecting block and contacts with annular rubber gasket, can extrude wedge groove and annular rubber gasket contact surface under the effort of cylinder, thereby increase frictional force and brake.

Compared with the prior art, the invention has the advantages that:

(1) according to the scheme, the buffering mechanism is arranged to buffer the position between the roller and the positioning plate, so that the whole wheelchair has a buffering function and is more comfortable and safe to use;

(2) the annular buffer cavity is matched with the annular pressure plate, so that the movable annular pressure plate can extrude air in the annular buffer cavity, and further the buffering force can be increased, and the movable annular pressure plate can adapt to people with different weights for use;

(3) due to the action of the wedge-shaped groove and the annular rubber gasket, rapid braking can be performed under the action of the cylinder.

The wheelchair is simple to operate and convenient to use, can ensure that the wheelchair is more comfortable and safe when in use, is suitable for people with different weights, and is convenient for people to use.

Drawings

Fig. 1 is a schematic structural view of a chair with an automatic braking function according to the present invention;

FIG. 2 is a schematic side view of a chair with an automatic braking function according to the present invention;

FIG. 3 is a schematic cross-sectional view of a positioning plate of a chair with an automatic braking function according to the present invention;

FIG. 4 is a schematic side view of a positioning plate of a chair with an automatic braking function according to the present invention;

FIG. 5 is a schematic perspective view of a brake disc of a chair with an automatic braking function according to the present invention;

FIG. 6 is a schematic structural diagram of a portion A of a chair with an automatic braking function according to the present invention;

fig. 7 is a schematic cross-sectional view of a rotating shaft and a worm wheel of a chair with an automatic braking function according to the present invention.

In the figure: 1. a seat plate; 2. a housing; 3. a rotating shaft; 4. positioning a plate; 5. a supporting strip; 6. a roller; 7. a fixing plate; 8. pushing the plate; 9. a hinged lever; 10. a brake disc; 11. a wedge-shaped groove; 12. connecting blocks; 13. an annular rubber gasket; 14. a moving block; 15. an annular buffer chamber; 16. a buffer tank; 17. a piston plate; 18. a drive motor; 19. a transmission rod; 20. separating the cloth; 21. a worm; 22. a worm gear; 23. a rotating groove; 24. positioning the shaft; 25. a cam; 26. a first bevel gear; 27. a second bevel gear; 28. an annular pressure plate; 29. a screw; 30. a gear; 31. a toothed ring; 32. a controller; 33. a radar detector; 34. a handrail; 35. a control switch; 36. a backup plate.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments, but not all embodiments.

Example one

Referring to fig. 1-6, a chair with an automatic braking function comprises a seat 1, a backup plate 36 is fixedly installed on the top of the seat 1, two symmetrically arranged handrails 34 are fixedly installed on the top of the seat 1, control switches 35 are arranged on the handrails 34, a housing 2 is fixedly installed on the bottom of the seat 1, a rotating shaft 3 is rotatably installed on the housing 2, positioning plates 4 are fixedly installed at both ends of the rotating shaft 3, a plurality of supporting bars 5 are annularly and slidably connected on the positioning plates 4, a same roller 6 is rotatably installed on the plurality of supporting bars 5, a buffer mechanism is arranged between the roller 6 and the positioning plate 4, a controller 32 is fixed on the inner wall of the top of the housing 2 through bolts, a braking mechanism is arranged on the rotating shaft 3, a fixing plate 7 is fixedly installed on the inner wall of the housing 2, a plurality of top springs are fixedly installed at the bottom of the fixing plate 7, and a driving motor 18 is fixed on the inner wall of the bottom of the housing 2 through bolts, a transmission rod 19 is fixedly installed on an output shaft of the driving motor 18, a transmission mechanism is arranged on the transmission rod 19, a radar detector 33 is installed at the bottom of the shell 2, the radar detector 33 is connected with the controller 32, the control switch 35 is connected with the controller 32, the driving motor 18 is connected with the controller 32, the brake mechanism comprises annular rubber gaskets 13, a brake disc 10, moving blocks 14, a push plate 8 and hinge rods 9, the two annular rubber gaskets 13 are respectively and fixedly installed on the inner walls of two sides of the shell 2, the brake disc 10 is slidably installed on the rotating shaft 3, the two moving blocks 14 are movably sleeved on the rotating shaft 3, the brake disc 10 is positioned between the moving blocks 14 and the annular rubber gaskets 13 on the same side, the push plate 8 is fixedly connected with a plurality of top springs, the push plate 8 is in threaded connection with the transmission rod 19, the two hinge rods 9 are both rotatably installed at the bottom of the push plate 8, and the hinge rods 9 are rotatably connected with the corresponding moving blocks 14, the rotating transmission rod 19 can drive the push plate 8 to move through the threaded connection with the push plate 8, the push plate 8 drives the two moving blocks 14 to move transversely through the hinge rod 9, and then the brake disc 10 is pushed to be in contact with the annular rubber gasket 13, so that the brake disc 10 is braked.

In this embodiment, the buffering mechanism includes an annular buffering cavity 15 and a piston plate 17, the annular buffering cavity 15 is disposed on the positioning plate 4, and a plurality of buffer slots 16 are annularly disposed on an outer inner wall of the annular buffering cavity 15, the buffer slots 16 are slidably connected with the corresponding piston plate 17, and the piston plate 17 is fixedly connected with the corresponding support bar 5, an annular pressing plate 28 is slidably connected in the annular buffering cavity 15, four symmetrically disposed screws 29 are fixedly mounted on one side of the annular pressing plate 28, a gear 30 is sleeved on an outer side thread of the screw 29, the gear 30 is rotatably connected with the positioning plate 4, a toothed ring 31 is rotatably mounted on one side of the positioning plate 4, the toothed ring 31 is mutually engaged with the four gears 30, the rotatable toothed ring 31 is mutually engaged with the gear 30, thereby driving the screws 29 to move, and further extruding the annular buffering cavity 15 through the annular pressing plate 28, so that the pressure in the annular buffering cavity 15 is increased, thereby increasing the buffering power.

In this embodiment, the transmission mechanism includes a worm 21 and a worm wheel 22, the worm 21 is fixedly installed on the transmission rod 19, the worm wheel 22 is fixedly installed on the rotary shaft 3, the worm 21 and the worm wheel 22 are engaged with each other, the outer side of the rotary shaft 3 is provided with a ratchet wheel, the inner wall of the worm wheel 22 is provided with two fixing grooves, the inner walls of the fixing grooves are slidably connected with wedge-shaped clamping rods, the wedge-shaped clamping rods are engaged with the ratchet wheel, one end of each wedge-shaped clamping rod is fixedly provided with a supporting spring, one end of each supporting spring is fixedly connected with the inner wall of the fixing groove, the transmission rod 19 capable of rotating in the forward direction can drive the rotary shaft 3 to rotate through the mutual engagement of the worm 21 and the worm wheel 22, and further can move through the positioning plate 4 and the roller 6 driving device, when the transmission rod 19 rotates in the reverse direction, due to the mutual engagement of the ratchet wheel and the wedge-shaped clamping rods, the rotary worm wheel 22 can not drive the rotary shaft 3 to rotate, thereby causing the shaft 3 to lose power.

In this embodiment, fixed mounting has connecting block 12 on brake disc 10, the sliding hole has been seted up on connecting block 12, sliding hole and 3 sliding connection of pivot, one side fixed mounting of connecting block 12 has the connecting plate, the connecting plate passes through the bearing rotation with the movable block 14 that corresponds and is connected, the spacing groove has all been seted up on the top inner wall of sliding hole and the bottom inner wall, sliding connection has the stopper in the spacing groove, stopper and 3 fixed connection of pivot, wedge groove 11 has all been seted up to one side that two brake discs 10 kept away from each other, wedge groove 11 mutually supports with the annular rubber gasket 13 that corresponds, movable block 14 that removes promotes wedge groove 11 on the brake disc 10 through connecting block 12 and contacts with annular rubber gasket 13, can extrude wedge groove 11 and annular rubber gasket 13 contact surface under push pedal 8's effort, thereby increase frictional force and brake.

The working principle is that when walking is needed, the driving motor 18 is started through the control switch 35, the driving motor 18 drives the rotating shaft 3 to rotate through the mutual meshing of the worm 21 and the worm wheel 22, the push plate 8 and the transmission rod 19 are not in a threaded state at the moment, the top spring is in a compressed state, the rotating shaft 3 drives the roller 6 to roll through the positioning plate 4 and the supporting strip 5, and further can drive the wheelchair to move, when the radar detector 33 detects an adjacent object, the driving motor 18 is controlled to rotate reversely through the controller 32, the output shaft of the driving motor 18 drives the transmission rod 19 to rotate reversely, meanwhile, the push plate 8 forms threaded connection with the transmission rod 19 again under the action of the top spring, the push plate 8 drives the two movable blocks 14 to move away from each other through the two hinge rods 9, the movable blocks 14 drive the brake disc 10 to move through the connecting plate and the connecting block 12, and the brake disc 10 is in contact friction with the annular rubber gasket 13 through the wedge-shaped groove 11, thereby can fix brake disc 10, brake disc 10 is fixed the countershaft 3 through stopper and spacing groove, and then brake the wheelchair, simultaneously when the people of different weight or when meetting different road conditions, rotate ring gear 31, ring gear 31 drives gear 30 through intermeshing with gear 30 and rotates, gear 30 is through being connected with locating plate 4's rotation, and with screw 29's threaded connection, thereby can drive screw 29 and remove, and then extrude in the annular cushion chamber 15 through ring clamp plate 28, make the increase of 15 interior gas pressures of annular cushion chamber, and then increase the buffering dynamics, it is experience sense and comfort level to increase people's use, more have the sense of safety simultaneously.

Example two

Referring to fig. 1-6, a chair with an automatic braking function comprises a seat 1, a backup plate 36 is fixedly installed on the top of the seat 1, two symmetrically arranged handrails 34 are fixedly installed on the top of the seat 1, control switches 35 are arranged on the handrails 34, a housing 2 is fixedly installed on the bottom of the seat 1, a rotating shaft 3 is rotatably installed on the housing 2, positioning plates 4 are fixedly installed at both ends of the rotating shaft 3, a plurality of supporting bars 5 are annularly and slidably connected on the positioning plates 4, a same roller 6 is rotatably installed on the plurality of supporting bars 5, a buffer mechanism is arranged between the roller 6 and the positioning plate 4, a controller 32 is fixed on the inner wall of the top of the housing 2 through bolts, a braking mechanism is arranged on the rotating shaft 3, a fixing plate 7 is fixedly installed on the inner wall of the housing 2, a plurality of top springs are fixedly installed at the bottom of the fixing plate 7, and a driving motor 18 is fixed on the inner wall of the bottom of the housing 2 through bolts, a transmission rod 19 is fixedly installed on an output shaft of the driving motor 18, a transmission mechanism is arranged on the transmission rod 19, a radar detector 33 is installed at the bottom of the shell 2, the radar detector 33 is connected with the controller 32, a control switch 35 is connected with the controller 32, the driving motor 18 is connected with the controller 32, a rotating groove 23 is formed in the top of the seat plate 1, a positioning shaft 24 is rotatably installed on the inner wall of the rotating groove 23, a plurality of cams 25 are fixedly installed on the positioning shaft 24, an isolation cloth 20 is installed at the top of the seat plate 1 and can cover and isolate the rotating groove 23 and the cams 25, a first bevel gear 26 is fixedly installed at the top end of the transmission rod 19, a second bevel gear 27 is fixedly installed on the positioning shaft, the first bevel gear 26 is meshed with the second bevel gear 27, the brake mechanism comprises an annular rubber gasket 13, a brake disc 10, a moving block 14, a push plate 8 and a hinge rod 9, two annular rubber gaskets 13 are respectively fixedly arranged on the inner walls of two sides of the shell 2, the brake disc 10 is slidably arranged on the rotating shaft 3, two movable blocks 14 are movably sleeved on the rotating shaft 3, the brake disc 10 is positioned between the movable blocks 14 and the annular rubber gaskets 13 on the same side, the push plate 8 is fixedly connected with a plurality of top springs, the push plate 8 is in threaded connection with the transmission rod 19, two hinged rods 9 are all rotatably arranged at the bottom of the push plate 8, the hinged rods 9 are rotatably connected with the corresponding movable blocks 14, the rotating transmission rod 19 can drive the push plate 8 to move through the threaded connection with the push plate 8, the push plate 8 drives two movable blocks 14 to transversely move through the hinged rods 9, further the brake disc 10 is pushed to be in mutual contact with the annular rubber gaskets 13, and therefore the brake disc 10 is braked

The difference between the second embodiment and the first embodiment is that the rotating transmission rod 19 can drive the positioning shaft 24 to rotate through the mutual engagement of the first bevel gear 26 and the second bevel gear 27, and the positioning shaft 24 can massage the user on the seat board 1 through the rotation of the plurality of cams 25, thereby increasing the comfort.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention in the technical scope of the present invention.

Claims

1. The utility model provides a chair that possesses automatic brake function, includes seat (1), its characterized in that, the top fixed mounting of seat (1) has backup plate (36), the top fixed mounting of seat (1) has handrail (34) that two symmetries set up, is equipped with control switch (35) on handrail (34), the bottom fixed mounting of seat (1) has casing (2), there are controller (32) through the bolt fastening on the top inner wall of casing (2), is equipped with brake mechanism on pivot (3).

2. The chair with the automatic braking function according to claim 1, wherein the shell (2) is rotatably provided with a rotating shaft (3), both ends of the rotating shaft (3) are fixedly provided with positioning plates (4), the positioning plates (4) are connected with a plurality of supporting bars (5) in an annular sliding manner, the supporting bars (5) are rotatably provided with a same roller (6), and a buffering mechanism is arranged between the roller (6) and the positioning plates (4).

3. The chair with the automatic brake function according to claim 2, wherein a fixing plate (7) is fixedly installed on the inner wall of the shell (2), a plurality of top springs are fixedly installed at the bottom of the fixing plate (7), a driving motor (18) is fixed on the inner wall of the bottom of the shell (2) through bolts, a transmission rod (19) is fixedly installed on an output shaft of the driving motor (18), a transmission mechanism is arranged on the transmission rod (19), a radar detector (33) is installed at the bottom of the shell (2), the radar detector (33) is connected with a controller (32), a control switch (35) is connected with the controller (32), and the driving motor (18) is connected with the controller (32); the brake mechanism comprises annular rubber gaskets (13), a brake disc (10), moving blocks (14), a push plate (8) and hinged rods (9), wherein the two annular rubber gaskets (13) are fixedly mounted on the inner walls of the two sides of the shell (2) respectively, the brake disc (10) is slidably mounted on the rotating shaft (3), the two moving blocks (14) are movably sleeved on the rotating shaft (3), the brake disc (10) is located between the moving blocks (14) and the annular rubber gaskets (13) on the same side, the push plate (8) is fixedly connected with a plurality of top springs, the push plate (8) is in threaded connection with the transmission rod (19), the two hinged rods (9) are rotatably mounted at the bottom of the push plate (8), and the hinged rods (9) are rotatably connected with the corresponding moving blocks (14); the buffer mechanism comprises an annular buffer cavity (15) and a piston plate (17), the annular buffer cavity (15) is arranged on the positioning plate (4), a plurality of buffer grooves (16) are annularly formed in the inner wall of the outer side of the annular buffer cavity (15), the buffer grooves (16) are slidably connected with the corresponding piston plate (17), and the piston plate (17) is fixedly connected with the corresponding support strip (5); drive mechanism includes worm (21) and worm wheel (22), worm (21) fixed mounting is on transfer line (19), worm wheel (22) fixed mounting is on pivot (3), and worm (21) and worm wheel (22) intermeshing, the outside of pivot (3) is equipped with the ratchet, two fixed slots have been seted up on the inner wall of worm wheel (22), sliding connection has the wedge kelly on the inner wall of fixed slot, the wedge kelly mutually supports with the ratchet, and the one end fixed mounting of wedge kelly has supporting spring, supporting spring's one end and the inner wall fixed connection of fixed slot.

4. The chair with the automatic brake function according to claim 3, wherein the brake disc (10) is fixedly provided with a connecting block (12), the connecting block (12) is provided with a sliding hole, and the sliding hole is slidably connected with the rotating shaft (3).

5. The chair with the automatic brake function as claimed in claim 4, wherein a connecting plate is fixedly mounted on one side of the connecting block (12), and the connecting plate is rotatably connected with the corresponding moving block (14) through a bearing.

6. The chair with the automatic brake function according to claim 5, wherein the top inner wall and the bottom inner wall of the sliding hole are both provided with a limiting groove, a limiting block is connected in the limiting groove in a sliding manner, and the limiting block is fixedly connected with the rotating shaft (3).

7. The chair with the automatic brake function according to claim 2, wherein the two brake discs (10) are provided with wedge-shaped grooves (11) on the sides away from each other, and the wedge-shaped grooves (11) are matched with the corresponding annular rubber gaskets (13).

8. The chair with the automatic brake function according to claim 3, wherein an annular pressure plate (28) is slidably connected in the annular buffer cavity (15), four symmetrically arranged screw rods (29) are fixedly installed on one side of the annular pressure plate (28), a gear (30) is sleeved on an outer side thread of each screw rod (29), the gear (30) is rotatably connected with the positioning plate (4), a toothed ring (31) is rotatably installed on one side of the positioning plate (4), and the toothed ring (31) is meshed with the four gear (30).