CN212816824U

CN212816824U - Old person's wheelchair that travelling comfort is good

Info

Publication number: CN212816824U
Application number: CN202021720783.8U
Authority: CN
Inventors: 孔令磷; 赵梦遐; 王文娟; 叶蕾; 段丹; 刘晓
Original assignee: Hubei University of Science and Technology
Current assignee: Hubei University of Science and Technology
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-03-30
Anticipated expiration: 2030-08-17

Abstract

The utility model provides a travelling comfort is good old person's wheelchair belongs to the instrument technical field of riding instead of walk. The device comprises a frame, two steering wheels arranged on the frame and two driving wheels arranged on the frame, wherein wheel shafts of the driving wheels are connected with an output shaft of a servo motor, a mounting shaft is connected between casings of the two servo motors through a spline, and a tension spring is connected between the end part of the mounting shaft and the casing of the servo motor; a plurality of buffer assemblies are arranged between the mounting shaft and the rack, each buffer assembly comprises two spiral spring strips, the inner ends of the spring strips are fixedly connected with the mounting shaft, the outer ends of the spring strips are fixedly connected with the rack, the two spring strips are symmetrically arranged, and an interval is arranged between every two adjacent buffer assemblies; the steering wheel is rotatably connected to the two guide pipes, a guide rod is connected to the guide pipes in a sliding mode, the guide rod is rotatably connected to the rack, and a return spring is sleeved on the guide rod. The utility model has the advantages of good comfort and the like.

Description

Old person's wheelchair that travelling comfort is good

Technical Field

The utility model belongs to the technical field of the instrument of riding instead of walk, a travelling comfort is good old person's wheelchair is related to.

Background

With the gradual aging of the national age structure, the market demand of rehabilitation instruments and mobility instruments for the old is rapidly increased, and the wheelchair is used as a tool for the old to move and relax, so that the comfort and the safety of the wheelchair are one of important indexes.

Among the prior art, for the wheelchair provide and alleviate the impact, all realize through modes such as spring, pneumatic cylinder with the mode that improves the travelling comfort, the mode of spring post is simple to operate, the cost is lower, but its occupation space is big, and the mode of hydraulic pressure buffering is better, but its is with high costs, the fault rate is high, the reliability is lower, it is well known, the loaded down with trivial details of wheelchair foundation structure has not only increased the matter of wheelchair, it is inconvenient to make its transport, and increased the installation and the control complexity of electron auxiliary device, be not conform to the requirement that old person used portability and brevity.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that exists to current technique, provide a travelling comfort good old person's wheelchair, the utility model aims to solve the technical problem how to improve the travelling comfort of wheelchair to adapt to old person's appeal.

The purpose of the utility model can be realized by the following technical proposal: the wheelchair for the old with good comfort is characterized by comprising a frame, two steering wheels arranged on the frame and two driving wheels arranged on the frame, wherein wheel shafts of the driving wheels are connected with an output shaft of a servo motor; a plurality of buffer assemblies are arranged between the mounting shaft and the rack, each buffer assembly comprises two spiral spring strips, the inner ends of the spring strips are fixedly connected with the mounting shaft, the outer ends of the spring strips are fixedly connected with the rack, the two spring strips are symmetrically arranged, and an interval is arranged between every two adjacent buffer assemblies; the steering wheel is rotatably connected to the two guide pipes, a guide rod is connected to the guide pipes in a sliding mode, the guide rod is rotatably connected to the rack, and a return spring is sleeved on the guide rod.

Furthermore, the lower end of the guide rod inclines towards the rear of the frame.

Furthermore, the inner end of the spring strip is provided with an arc-shaped inner connecting strip which is matched with the peripheral surface of the installation shaft, the outer end of the spring is provided with a plate-shaped outer connecting strip, the inner connecting strip is welded on the installation shaft, and the outer mounting strip is welded on the frame.

Further, fixed arc cover one and the arc cover two that are provided with the parcel installation axle on the frame, arc cover one and arc cover two can surround the chamber that holds that forms each spring strip of parcel, the installation axle rotates to be connected on arc cover one and arc cover two, it has the fine sand to hold the intracavity packing.

Furthermore, a mudguard is arranged on the driving wheel.

Further, the mounting shaft can slide relative to the first arc cover and the second arc cover along the axis direction.

The spiral spring strip is provided with at least two circles and is connected between the frame and the mounting shaft, and the adjacent circles of the spring strip are provided with intervals, so that the frame can be buffered by the spring strips when being impacted in the front-back direction and the vertical direction; the extension spring carries out the return to the position of installation axle in the axis direction, because there is the space that allows to take place the displacement in the axis direction in spring strip inner and outer end, and also has restoring force after the deformation, transversely has certain displacement distance's the circumstances at the installation axle under, the frame also can cushion through the deformation of spring strip when receiving the impact force that comes from both sides, from this it can be seen that can cushion the frame when three dimension takes place to strike through spiral helicine spring strip.

The fine sand filled in the accommodating cavity can be filled into the gap between the rings of the spring strip, and the fine sand can be pushed when the spring strip deforms, so that the deformation amplitude is alleviated, the deformation resetting sensitivity of the frame is reduced, and the whole comfort is improved.

The steering wheel is turned relative to the frame through the pull rod, the lower end of the guide rod inclines towards the rear of the frame, the spring can stretch over the raised obstacle when the wheelchair moves forwards to relieve to a certain extent, and the shock amplitude is reduced.

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

1. the structure is simple, the buffer assembly connected with the outer sides of the mounting shafts of the two driving wheels provides main buffer for the whole wheelchair, the occupied space is small, and the structure is simple and reliable;

2. the wheel diameter of the driving wheel is far larger than that of the steering wheel, so that the steering is light, the obstacle crossing capability is strong, and the comfort is good;

3. the combination through spiral helicine spring strip realizes buffering the frame main bearing area, realizes the flexible connection, realizes all-round buffering, also has better buffering to especially offside impact, and this is that current wheelchair does not possess, also is the special wheelchair of old person to the further optimization of travelling comfort requirement.

Drawings

Figure 1 is a side elevational view of the present wheelchair.

FIG. 2 is a sectional view of the wheelchair in the mounting axis cross-sectional direction.

Fig. 3 is a schematic structural view of the buffer assembly.

Fig. 4 is a schematic view of the structure of the spring bar.

Fig. 5 fig. 2 is an enlarged view of a portion a.

Fig. 6 is a schematic view of the connection structure of the mounting shaft and the driving wheel.

In the figure, 1, a frame; 2. a steering wheel; 3. a drive wheel; 41. a servo motor; 42. installing a shaft; 43. a tension spring; 44. a first arc cover; 45. a second arc cover; 46. an accommodating chamber; 5. a spring bar; 51. an inner connecting strip; 52. an outer connecting strip; 61. a guide tube; 62. a guide bar; 63. a return spring; 7. a fender is provided.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 6, the steering wheel comprises a frame 1, two steering wheels 2 arranged on the frame 1 and two driving wheels 3 arranged on the frame 1, wherein the wheel shaft of the driving wheel 3 is connected with the output shaft of a servo motor 41, a mounting shaft 42 is connected between the casings of the two servo motors 41 through a spline, and a tension spring 43 is connected between the end of the mounting shaft 42 and the casing of the servo motor 41; a plurality of buffer assemblies are arranged between the mounting shaft 42 and the rack, each buffer assembly comprises two spiral spring strips 5, the inner ends of the spring strips 5 are fixedly connected with the mounting shaft 42, the outer ends of the spring strips 5 are fixedly connected with the rack, the two spring strips 5 are symmetrically arranged, and an interval is arranged between every two adjacent buffer assemblies; the steering wheel 2 is rotatably connected to two guide tubes 61, a guide rod 62 is slidably connected in the guide tubes 61, the guide rod 62 is rotatably connected to the frame, and a return spring 63 is sleeved on the guide rod 62. The lower end of the guide bar 62 is inclined rearward of the vehicle frame 1.

The inner end of the spring strip 5 is provided with an arc inner connecting strip 51 which is matched with the circumferential surface of the mounting shaft 42, the outer end of the spring is provided with a plate-shaped outer connecting strip 52, the inner connecting strip 51 is welded on the mounting shaft 42, and the outer mounting strip is welded on the frame 1.

Fixed arc cover one 44 and the arc cover two 45 that are provided with parcel installation axle 42 on frame 1, arc cover one 44 and arc cover two 45 can surround and form the chamber 46 that holds of each spring strip 5 of parcel, and installation axle 42 rotates to be connected on arc cover one 44 and arc cover two 45, holds that the intracavity 46 intussuseption is filled with the fine sand.

A mudguard 7 is provided on the driving wheel 3. The mounting shaft 42 can slide relative to the first arc cover 44 and the second arc cover 45 along the axial direction.

The spiral spring strip 5 is provided with at least two circles and is connected between the frame 1 and the mounting shaft 42, and the adjacent circles of the spring strip 5 are provided with intervals, so that the frame 1 can be buffered by the spring strips 5 when being impacted in the front-back direction and the vertical direction; the tension spring 43 returns the position of the mounting shaft 42 in the axial direction, and because the inner end and the outer end of the spring strip 5 have a space allowing displacement in the axial direction and have restoring force after deformation, under the condition that the mounting shaft 42 has a certain displacement distance in the transverse direction, the frame 1 can also buffer through the deformation of the spring strip 5 when receiving impact force from two sides, so that it can be seen that the frame 1 can be buffered through the spiral spring strip 5 when impact occurs in three dimensions.

The fine sand filled in the accommodating cavity 46 can be filled in the gap between the rings of the spring strip 5, and the fine sand can be pushed when the spring strip 5 deforms, so that the deformation amplitude is alleviated, the deformation resetting sensitivity of the frame 1 is reduced, and the overall comfort is improved.

The steering wheel is turned relative to the frame 1 through the pull rod, the lower end of the guide rod 62 inclines towards the rear of the frame 1, the spring 63 can stretch over the raised obstacle when the wheelchair moves forwards to achieve relaxation to a certain degree, and the shock amplitude is reduced.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The wheelchair for the old with good comfort is characterized by comprising a frame (1), two steering wheels (2) arranged on the frame (1) and two driving wheels (3) arranged on the frame (1), wherein wheel shafts of the driving wheels (3) are connected with an output shaft of a servo motor (41), a mounting shaft (42) is connected between casings of the two servo motors (41) through a spline, and a tension spring (43) is connected between the end part of the mounting shaft (42) and the casing of the servo motor (41); a plurality of buffer assemblies are arranged between the mounting shaft (42) and the rack, each buffer assembly comprises two spiral spring strips (5), the inner ends of the spring strips (5) are fixedly connected with the mounting shaft (42), the outer ends of the spring strips (5) are fixedly connected with the rack, the two spring strips (5) are symmetrically arranged, and a gap is reserved between every two adjacent buffer assemblies; the steering wheel (2) is rotatably connected to the two guide pipes (61), a guide rod (62) is connected to the guide pipes (61) in a sliding mode, the guide rod (62) is rotatably connected to the rack, and a return spring (63) is sleeved on the guide rod (62).

2. The wheelchair for elderly with good comfort as claimed in claim 1, wherein the lower end of the guide bar (62) is inclined to the rear of the frame (1).

3. The wheelchair as claimed in claim 1 or 2, wherein the spring strips (5) have inner curved connecting strips (51) at their inner ends, which are adapted to the circumference of the mounting axle (42), and outer plate-like connecting strips (52) at their outer ends, the inner connecting strips (51) being welded to the mounting axle (42), and the outer connecting strips (52) being welded to the frame (1).

4. The wheelchair for the elderly with good comfort as claimed in claim 1 or 2, wherein the frame (1) is fixedly provided with a first arc cover (44) and a second arc cover (45) wrapping the mounting shaft (42), the first arc cover (44) and the second arc cover (45) can surround to form a containing cavity (46) wrapping each spring strip (5), the mounting shaft (42) is rotatably connected to the first arc cover (44) and the second arc cover (45), and the containing cavity (46) is filled with fine sand.

5. Wheelchair for elderly with good comfort according to claim 1 or 2, characterised in that the driving wheel (3) is provided with a mudguard (7).

6. The wheelchair as claimed in claim 1 or 2, wherein the mounting shaft (42) is slidable in the axial direction relative to the first arc-shaped cover (44) and the second arc-shaped cover (45).