CN212439311U

CN212439311U - Walking aid

Info

Publication number: CN212439311U
Application number: CN202020530233.3U
Authority: CN
Inventors: 唐学鑫; 洪震; 王艳戎; 李刚; 陈林; 姚翔
Original assignee: Luzhou Vocational and Technical College
Current assignee: Luzhou Vocational and Technical College
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2021-02-02
Anticipated expiration: 2030-04-13

Abstract

A walking aid comprises a support frame, a rotating arm, a screw rod, a coupler, a speed reducer, an upper guide rod, a lower guide rod, a front support, universal wheels, a control frame, a movable support leg, a movable frame, a rear support, a middle support, a rotary hinged support, a seat plate, a cross rod, seat support legs, a battery, an electric control unit, a plunger, a large spring, a pressing plate, a wedge block, a small spring, a retaining body, a clamping ring, a set screw, a locking nut, a steel ball, a fixed hinged support, a shifting fork, a lever and a pin shaft. The left side surface of the lower part of the rotating arm is provided with a spherical pit matched with the steel ball and is compressed by the steel ball, the middle part of the rotating arm is in threaded connection with the screw rod, and the upper part of the rotating arm is fixedly connected with the seat plate. The wedging ring is arranged in the lower through hole on the left side of the control frame, the maintaining body is arranged in the wedging ring, the maintaining body is provided with a through groove, and a wedge block and a small spring are sequentially arranged in the through groove from right to left. The seat of the walking aid can be automatically unfolded, and a user can sit on the seat to have a rest without turning.

Description

Walking aid

Technical Field

The invention relates to a walking aid.

Background

A plurality of walking aids are specially provided with a seat in order to facilitate a user to sit and rest everywhere when walking. However, the seat of the walking aid machine needs to be unfolded manually by a user and needs to be rotated to be seated on the seat when the seat is used. This is difficult for users who have severe inconvenience in their legs and feet and are weak.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a walking aid, when in use, the seat can be automatically unfolded only by pressing a switch, and a user can sit on the seat for rest without turning.

The technical scheme adopted by the invention for solving the technical problems is as follows: the designed walking aid comprises a support frame, a rotating arm, a screw rod, a coupler, a speed reducer, an upper guide rod, a lower guide rod, a front support, a universal wheel, a control frame, a movable support leg, a movable frame, a rear support, a middle support, a rotating hinged support, a seat plate, a cross rod, a seat support leg, a battery, an electric control unit, a plunger, a large spring, a pressing plate, a wedge block, a small spring, a retainer, a clamping ring, a set screw, a locking nut, a steel ball, a fixed hinged support, a shifting fork, a lever and a pin shaft, wherein the front support, the middle support, the rear support, the battery and the electric control unit are all fixedly arranged on the support frame, the speed reducer is arranged on the front support, the speed reducer is connected with the screw rod through the coupler, the screw rod is rotatably supported on the middle support, the front ends of the upper guide rod and the lower guide rod are arranged on the front support, the rear, the control frame and the moving frame are slidably arranged on an upper guide rod and a lower guide rod, the middle part of the rotating arm is in threaded connection with a screw rod, the upper part of the rotating arm is fixedly connected with a seat plate, the upper ends of moving support legs are hinged with the seat plate through rotating hinged supports, the middle parts of the moving support legs are connected with the moving frame, the seat support legs are hinged with the seat plate, two ends of a cross rod are respectively hinged with the middle parts of the seat support legs and the middle parts of the moving support legs, the seat support legs, the moving support legs, the cross rod and the seat plate form a parallelogram mechanism, the rotating axis of the rotating hinged supports and the axis of the screw rod are on the same straight line, the left side of the control frame is provided with an upper through hole and a lower through hole, the bottom of the upper through hole is provided with a section of through groove from right to left, a steel ball, a plunger and a large spring, the other end of the clamping ring extends into a groove formed in the lower portion of the shifting fork, a section of conical inner hole is formed in the clamping ring, the taper angle of the conical inner hole meets the self-locking condition of a wedge block, the clamping ring is arranged in a lower through hole in the left side of the control frame, the retaining body is arranged in the clamping ring, a through groove is formed in the retaining body, the wedge block and a small spring are sequentially arranged in the through groove from right to left, the bottom surface of the wedge block is a concave arc surface matched with the upper guide rod, the top surface of the wedge block is a convex arc surface matched with the conical inner hole of the clamping ring, a threaded hole for assembling a clamping screw is formed in the upper portion of the right side of the control frame, a spherical pit matched with a steel ball is formed in the left side of the lower portion of the rotating arm and is compressed by the steel ball, the right side of the lower portion.

The coupling in the technical scheme can be a rigid coupling.

The working principle of the invention is as follows: when the seat needs to be unfolded, the electric control unit controls the speed reducer to drive the screw rod to rotate anticlockwise (when the front part of the support frame is viewed backwards), and at the moment, the torque borne by the rotating arm cannot extrude out the steel balls in the spherical pits on the left side surface of the lower part of the rotating arm, so that the rotating arm, the seat plate directly connected with the rotating arm and the moving support legs indirectly connected with the rotating arm move rightwards together. When the rotating arm is blocked by the middle support and cannot move continuously, the rotating arm forcibly extrudes the steel balls in the spherical pits of the rotating arm to rotate anticlockwise along with the screw. Because the chair support legs, the movable support legs, the cross bars and the seat board are parallelogram mechanisms, the movable support legs are limited by the movable frame to be always kept in a vertical state. So that the seat board is driven by the rotating arm to rotate anticlockwise, and the seat support legs are gradually unfolded. When the seat pan is rotated to the horizontal position, the seat legs are fully deployed and land vertically. At this time, the electric control unit stops the operation of the speed reducer, and the unfolding of the seat is completed. In the process, after the rotating arm extrudes the steel ball in the spherical pit, the lower end of the lever is separated from the contact with the wedge block by the shifting fork, so that the wedge block is wedged between the upper guide rod and the wedge clamping ring under the action of the small spring. When the seat is retracted, the electric control unit controls the speed reducer to drive the screw rod to rotate clockwise. Due to the wedging action of the wedges, the control frame cannot move, and the seat plate rotates clockwise from the horizontal position along with the screw rod. When the seat plate is rotated to the vertical position, the seat support legs are completely recovered, and the large spring enables the steel balls to be pressed into the spherical concave pits of the rotating arms again through the plunger. Meanwhile, the lower end of the lever pushes the wedge block to move leftwards so that the wedge block loses the wedging effect. The screw rod continues to rotate, and the rotating arm, the seat plate directly connected with the rotating arm and the moving support leg indirectly connected with the rotating arm move leftwards together due to the limitation of the pressing steel ball. When the seat moves in place, the electric control unit stops the speed reducer to work, and the seat is recovered.

The invention has the beneficial effects that: the seat of the walking aid can be automatically unfolded, and a user can sit on the seat to have a rest without turning.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a view from direction B of fig. 1.

Fig. 4 is a partial view I of fig. 1.

Fig. 5 is a cross-sectional view C-C of fig. 3.

Fig. 6 is a cross-sectional view taken along line D-D of fig. 3.

In the figure, 1, a support frame, 2, a rotating arm, 3, a screw rod, 4, a coupler, 5, a speed reducer, 6, an upper guide rod, 7, a lower guide rod, 8, a front support, 9, a universal wheel, 10, a control frame, 11, a movable support leg, 12, a movable frame, 13, a rear support, 14, a middle support, 15, a rotary hinged support, 16, a seat plate, 17, a cross rod, 18, seat support legs, 19, a battery, 20, an electronic control unit, 21, a plunger, 22, a large spring, 23, a pressure plate, 24, a wedge block, 25, a small spring, 26, a retaining body, 27, a wedge clamping ring, 28, a set screw, 29, a locking nut, 30, a steel ball, 31, a fixed hinged support, 32, a shifting fork, 33, a lever and 34 are arranged.

Detailed Description

As shown in fig. 1, 2, 3, 4, 5 and 6, the walking aid of the embodiment of the present invention includes a support frame 1, a rotating arm 2, a screw 3, a coupling 4, a speed reducer 5, an upper guide rod 6, a lower guide rod 7, a front support 8, a universal wheel 9, a control frame 10, a movable support 11, a movable frame 12, a rear support 13, a middle support 14, a rotating hinge 15, a seat plate 16, a cross rod 17, a seat support 18, a battery 19, an electronic control unit 20, a plunger 21, a large spring 22, a pressure plate 23, a wedge block 24, a small spring 25, a holding body 26, a wedge ring 27, a set screw 28, a lock nut 29, a steel ball 30, a fixed hinge 31, a shift fork 32, a lever 33 and a pin 34. The front support 8, the middle support 14, the rear support 13, the battery 19 and the electronic control unit 20 are all fixedly arranged on the support frame 1. The speed reducer 5 is arranged on the front support 8, the speed reducer 5 is connected with the screw rod 3 through a coupler 4, and the coupler 4 is a rigid coupler 4. The screw 3 is rotatably supported on the middle support 14. The front ends of the upper guide rod 6 and the lower guide rod 7 are arranged on the front support 8, and the rear ends are arranged on the rear support 13. The upper guide rod 6, the lower guide rod 7 and the screw rod 3 are parallel to each other. The control frame 10 and the moving frame 12 are slidably mounted on the upper guide bar 6 and the lower guide bar 7. The middle part of the rotating arm 2 is in threaded connection with the screw rod 3, and the upper part of the rotating arm 2 is fixedly connected with the seat plate 16. The upper end of the movable supporting leg 11 is hinged with the seat plate 16 through a rotary hinge seat 15, and the middle part of the movable supporting leg 11 is connected with the movable frame 12. The seat legs 18 are hinged with the seat board 16, two ends of the cross bar 17 are respectively hinged with the middle parts of the seat legs 18 and the movable legs 11, and the seat legs 18, the movable legs 11, the cross bar 17 and the seat board 16 form a parallelogram mechanism. The rotating axis of the rotating hinged support 15 is on the same straight line with the axis of the screw rod 3. The left side of the control frame 10 is provided with an upper through hole and a lower through hole, the bottom of the upper through hole is provided with a section of through groove from the right end, and the upper through hole is sequentially provided with a steel ball 30, a plunger 21 and a large spring 22 from right to left. The middle part of the plunger 21 is provided with a ring groove, the shifting fork 32 is clamped in the ring groove, and the lower part of the shifting fork 32 is provided with a groove. The middle part of the lever 33 is hinged with the fixed hinge seat 31, one end of the pin shaft 34 is fixedly arranged at the upper part of the lever 33, and the other end thereof extends into a groove formed at the lower part of the shifting fork 32. The wedging ring 27 is provided with a section of conical inner bore, the cone angle of which satisfies the self-locking condition of the wedge 24. The wedging ring 27 is arranged in the lower through hole at the left side of the control frame 10, and the holding body 26 is arranged in the wedging ring 27. The holding body 26 is provided with a through groove which is provided with a wedge 24 and a small spring 25 from right to left. The bottom surface of the wedge 24 is a concave arc surface matched with the upper guide rod 6, and the top surface of the wedge 24 is a convex arc surface matched with the conical inner hole of the wedging ring 27. The upper part of the right side of the control frame 10 is provided with a threaded hole for assembling a set screw 28. The left side surface of the lower part of the rotating arm 2 is provided with a spherical pit matched with the steel ball 30 and is pressed tightly by the steel ball 30, and the right side surface of the lower part of the rotating arm 2 is fixed tightly by the end of the set screw 28. The electronic control unit 20 controls the speed reducer 5. The front bottom of the support frame 1 is provided with a universal wheel 9.

When the seat needs to be unfolded, the electronic control unit 20 controls the speed reducer 5 to drive the screw rod 3 to rotate anticlockwise (when the front part of the support frame 1 is viewed backwards), and at the moment, the torque borne by the rotating arm 2 cannot extrude the steel ball 30 in the spherical pit on the left side surface of the lower part of the rotating arm 2, so that the rotating arm 2, the seat plate 16 directly connected with the rotating arm and the moving support leg 11 indirectly connected with the rotating arm are moved rightwards together. When the rotating arm 2 is blocked by the middle support 14 and cannot move continuously, the rotating arm 2 forcibly extrudes the steel ball 30 in the spherical pit to rotate anticlockwise along with the screw 3. Because the seat legs 18, the movable legs 11, the cross bar 17 and the seat plate 16 are parallelogram mechanisms, the movable legs 11 are always kept in a vertical state under the limitation of the movable frame 12. The seat plate 16 is rotated counterclockwise by the pivotal arm 2, and the seat legs 18 are gradually unfolded. When the seat pan 16 is rotated to the horizontal position, the seat legs 18 are fully extended and grounded vertically. At this time, the electronic control unit 20 stops the operation of the speed reducer 5, and the seat unfolding is completed. In the above process, after the rotating arm 2 extrudes the steel ball 30 in the spherical pit, the shifting fork 32 makes the lower end of the lever 33 be separated from the contact with the wedge 24, so that the wedge 24 is wedged between the upper guide rod 6 and the wedge clamping ring 27 under the action of the small spring 25. When the seat is retracted, the electronic control unit 20 controls the speed reducer 5 to drive the screw rod 3 to rotate clockwise. The control frame 10 cannot move due to the wedging action of the wedges 24, and the seat plate 16 follows the screw 3 to rotate clockwise from the horizontal position. When the seat plate 16 is rotated to the vertical position, the seat leg 18 is completely retracted and the large spring 22, via the plunger 21, causes the steel ball 30 to be re-pressed into the spherical recess of the swivel arm 2. At the same time, the lower end of the lever 33 pushes the wedge 24 to move leftward to lose its wedging action. The screw 3 continues to rotate, and the rotating arm 2 and the seat plate 16 directly connected with the rotating arm and the moving support leg 11 indirectly connected with the rotating arm move leftwards together due to the limitation of the pressing steel ball 30. When the seat is moved to the right position, the electronic control unit 20 stops the operation of the speed reducer 5, and the seat is completely recovered.

Claims

1. The utility model provides a walking aid machine, includes support frame, rocking arm, screw rod, shaft coupling, speed reducer, goes up the guide arm, lower guide arm, preceding support, universal wheel, control frame, removes the stabilizer blade, removes the frame, back support, well support, rotates free bearing, bedplate, horizontal pole, seat stabilizer blade, battery, electrical control unit, plunger, big spring, clamp plate, wedge, little spring, the retainer, carve the tighrening circle, holding screw, lock nut, steel ball, fixed free bearing, shift fork, lever and round pin axle, its characterized in that: the front support, the middle support, the rear support, the battery and the electric control unit are all fixedly arranged on the support frame, the speed reducer is arranged on the front support, the speed reducer is connected with the screw rod through a coupler, the screw rod is rotatably supported on the middle support, the front ends of the upper guide rod and the lower guide rod are arranged on the front support, the rear ends of the upper guide rod and the lower guide rod are arranged on the rear support, the upper guide rod, the lower guide rod and the screw rod are parallel to each other, the control frame and the moving frame are slidably arranged on the upper guide rod and the lower guide rod, the middle part of the rotating arm is in threaded connection with the screw rod, the upper part of the rotating arm is fixedly connected with the seat plate, the upper end of the moving support leg is hinged with the seat plate through a rotating hinge seat, the middle part of the moving support leg is connected with the seat plate, the two ends of the cross, the rotating axis of the rotating hinged support and the axis of the screw rod are on the same straight line, the left side of the control frame is provided with an upper through hole and a lower through hole, the bottom of the upper through hole is provided with a section of through groove from the right end, the upper through hole is sequentially provided with a steel ball, a plunger and a large spring from right to left, the middle part of the plunger is provided with a ring groove, a shifting fork is clamped in the ring groove, the lower part of the shifting fork is provided with a groove, the middle part of the lever is hinged with the fixed hinged support, one end of a pin shaft is fixedly arranged at the upper part of the lever, the other end of the pin shaft extends into the groove formed at the lower part of the shifting fork, the wedge ring is provided with a section of conical inner hole, the cone angle of the conical inner hole meets the self-locking condition of the wedge, the wedge ring is arranged in the lower through hole at the left side of the control frame, the retainer is provided with a through groove, the wedge block and a small spring, the upper portion of the right side of the control frame is provided with a threaded hole for assembling a set screw, the left side surface of the lower portion of the rotating arm is provided with a spherical pit matched with the steel ball and is compressed tightly by the steel ball, the right side surface of the lower portion of the rotating arm is tightly fixed by the end head of the set screw, the electric control unit controls the speed reducer, and the front bottom of the support frame is provided with a universal wheel.

2. The walking aid of claim 1, wherein: the coupling is a rigid coupling.