Automatically decelerating wheel body

Abstract

The application provides an automatic deceleration wheel body, which comprises a wheel body unit and a deceleration unit. The wheel body unit comprises a wheel seat, a wheel shaft arranged in the wheel seat and a roller capable of rotating around the wheel shaft. A plurality of clamping pieces are arranged in a radial manner on the side edge of the wheel frame. The plurality of clamping pieces rotate with the roller. The deceleration unit comprises a fixing seat and a sliding piece. The fixing seat is arranged on one side of the roller. The fixing seat is provided with a sliding hole. The sliding piece is arranged in the sliding hole. The sliding piece is provided with an elastic part. The front end of the elastic part is connected with a blocking part. When the roller travels on a downhill, the blocking part of the sliding piece protrudes out of the sliding hole and moves to the rotating path of the plurality of clamping pieces. The blocking part is driven by the elasticity of the elastic part and is driven by the plurality of clamping pieces one by one, so that the effect of deceleration is achieved.

Description

TECHNICAL FIELD

[0001] The present invention relates to a wheel body, in particular, a wheel body with automatic deceleration function when descending. BACKGROUND

[0002] Taiwan has entered an aging society and the demand for long-term care is increasing. In hospitals or nursing institutions, patients or the elderly often have difficulty moving due to physical disabilities or weakness and must rely on the assistance of a walking aid or a wheelchair to facilitate their activities outside, resulting in an increasing use of walking aids or wheelchairs.

[0003] Both walking aids and wheelchairs are equipped with a wheel body, which allows the wheel body to roll along the ground. However, when the walking aid or wheelchair is descending, it is easy to suddenly accelerate due to the force of gravity, causing the wheel body to rotate too fast. In this case, the user often cannot react immediately to control the brake mechanism to stop the wheel body, thereby easily causing the user to fall or the walking aid or wheelchair to overturn, posing a high risk to patients, the elderly, and the disabled who have weak control. Therefore, there is a need for improvement. SUMMARY

[0004] In view of the above-mentioned shortcomings of general wheel bodies, the present invention provides an automatic deceleration wheel body, which comprises: a wheel body unit including a wheel seat, a wheel shaft provided in the wheel seat, and a roller capable of rotating around the wheel shaft, the wheel seat being provided with a through hole, the wheel shaft being provided in the through hole, one end of the wheel shaft being provided with a non-circular section, the roller being provided with a wheel frame, the outer periphery of the wheel frame being combined with an outer wheel, the center of the wheel frame being provided with a shaft hole, the shaft hole being provided for the wheel shaft to pass through, so that the roller can freely rotate on the wheel shaft, a plurality of radial clamping pieces being arranged around the edge of one side of the wheel frame, the plurality of clamping pieces rotating with the roller; a deceleration unit including a fixed seat and a sliding member, the fixed seat being provided with a fixed hole and a sliding hole, the fixed hole being sleeved on the non-circular section of the wheel shaft to be fixed, so that the fixed seat is located on one side of the roller, the sliding member being slidably arranged in the sliding hole, the sliding member being provided with a sliding body, the front end of the sliding body being connected with an elastic part, the front end of the elastic part being connected with a blocking part, when the roller travels downhill, the sliding hole forms a downward inclined angle, the sliding member slides along the sliding hole by gravity, so that the blocking part of the sliding member protrudes out of the sliding hole and moves to the rotating path of the plurality of clamping pieces, the blocking part is elastically moved by the plurality of clamping pieces one by one through the cooperation of the elastic part, achieving the effect of deceleration.

[0005] The main purpose of the automatic deceleration wheel body of the present invention is to automatically generate a deceleration effect when the roller travels downhill, preventing sudden acceleration and avoiding excessive speed when descending, thereby improving the safety of the user. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1Fig. 1 is a perspective view of the present application.

[0007] Figure 2 Fig. 2 is an exploded perspective view of the present application.

[0008] Figure 3 Fig. 3 is a perspective view of the fixed seat and sliding member of the present application.

[0009] Figure 4 Fig. 4 is a sectional view of the present application.

[0010] Figure 5 Fig. 5 is a schematic diagram of the automatic deceleration when going downhill of the present application. Figure 1 .

[0011] Figure 6 Fig. 6 is a schematic diagram of the automatic deceleration when going downhill of the present application. Figure 2 .

[0012] Figure 7 Fig. 7 is a schematic diagram of the use of the present application installed on a wheelchair.

[0013] Figure 8 Fig. 8 is a schematic diagram of the use of the present application installed on a walker.

[0014] Figure 9 Fig. 9 is a perspective view of another embodiment of the present application.

[0015] Figure 10 Fig. 10 is an exploded perspective view of another embodiment of the present application.

[0016] Figure 11 Fig. 11 is a sectional view of another embodiment of the present application.

[0017] Figure 12 Fig. 12 is a schematic diagram of the automatic deceleration when going downhill of another embodiment of the present application. Figure 1 .

[0018] Figure 13 Fig. 13 is a schematic diagram of the automatic deceleration when going downhill of another embodiment of the present application. Figure 2 .

[0019] Reference numerals

[0020] 1: automatic deceleration wheel body 2: wheelchair

[0021] 3: walker 10: wheel body unit

[0022] 11: wheel seat 111: side plate

[0023] 1111: perforation 12: wheel shaft

[0024] 121: non-circular segment 13: roller

[0025] 131: wheel frame 1311: shaft hole

[0026] 1312: clamping piece 1313: elastic piece

[0027] 132: outer wheel 20: deceleration unit

[0028] 21: fixing seat 211: fixing hole

[0029] 212: sliding hole 22: sliding piece

[0030] 221: sliding body 222: elastic part

[0031] 223: blocking part 23: protective cover

[0032] 231: assembling hole 24: fixing seat

[0033] 241: sliding hole 25: sliding piece

[0034] 251: limiting groove 2511: first end

[0035] 2512: second end 252: blocking part

[0036] 26: side cover 261: through hole

[0037] 262: arc-shaped long hole 263: screw DETAILED DESCRIPTION

[0038] The following further describes the preferred embodiments of the present application with reference to the drawings, so that those skilled in the art can implement the present application according to the description.

[0039] Please refer to Figures 1 to 4 The automatic deceleration wheel body 1 of the present application comprises a wheel body unit 10 and a deceleration unit 20.

[0040] The wheel body unit 10 comprises a wheel seat 11, a wheel shaft 12 penetrating the wheel seat 11, and a rolling wheel 13 rotatable around the wheel shaft 12. The wheel seat 11 extends two side plates 111, and the two side plates 111 are penetrated by a through hole 1111, and the wheel shaft 12 penetrates the through hole 1111. One end of the wheel shaft 12 is provided with a non-circular section 121. The rolling wheel 13 is arranged between the two side plates 111. The rolling wheel 13 is provided with a wheel frame 131. The outer periphery of the wheel frame 131 is combined with an outer wheel 132. The center of the wheel frame 131 is provided with an axle hole 1311 for the wheel shaft 12 to penetrate, so that the rolling wheel 13 can freely rotate on the wheel shaft 12. The wheel frame 131 is provided with a plurality of clamping pieces 1312 arranged in a radial manner near the edge of one side of the wheel frame 131. The plurality of clamping pieces 1312 rotate with the rolling wheel 13.

[0041] The deceleration unit 20 includes a fixed base 21, a sliding member 22, and a protective cover 23. The fixed base 21 is installed between two side plates 111 and located on one side of the roller 13. The fixed base 21 has a fixing hole 211 and a sliding hole 212. The fixing hole 211 is fixed on the non-circular section 121 of the axle 12. The sliding hole 212 is horizontal in normal operation. The sliding member 22 slides in the sliding hole 212, allowing the sliding member 22 to slide along the sliding hole 212. The sliding displacement is provided by the sliding member 22, which has a sliding body 221. The front end of the sliding body 221 is connected to a sheet-shaped elastic part 222. The front end of the elastic part 222 is connected to a stop part 223. The protective cover 23 is installed between the two side plates 111 of the wheel seat 11 and is located on one side of the roller 13. The protective cover 23 covers the fixed seat 21 and the sliding member 22. The center of the protective cover 23 is provided with an assembly hole 231. The assembly hole 231 is fitted onto the non-circular segment 121 for fixation.

[0042] In use, the automatic reduction wheel 1 can be installed on the wheelchair 2 (e.g., Figure 7 (as shown) or walking aid 3 (such as Figure 8 As shown), when the wheelchair 2 or walking aid 3 is traveling on flat ground, the stop 223 of the sliding member 22 is not on the rotation path of the multiple locking plates 1312 (as shown). Figure 4 (as shown), and can proceed normally; as Figure 5 and Figure 6 As shown, when the wheelchair 2 or the walker 3 travels downhill, the sliding hole 212 tilts downwards. The sliding member 22 slides along the sliding hole 212 under gravity, causing the stop 223 of the sliding member 22 to protrude out of the outside of the sliding hole 212 and move onto the rotation path of the multiple blocking pieces 1312. The stop 223 blocks the multiple blocking pieces 1312. With the elastic deformation and elastic recovery of the elastic part 222, the stop 223 is pushed by the multiple blocking pieces 1312 one by one, achieving the effect of deceleration.

[0043] Furthermore, such as Figures 9 to 11 As shown, this is another embodiment of the automatic reduction wheel body 1 of the present invention. The automatic reduction wheel body 1 of the other embodiment includes a wheel body unit 10 and a reduction unit 20.

[0044] The wheel unit 10 includes a wheel seat 11, a wheel axle 12 passing through the wheel seat 11, and a roller 13 that can rotate around the wheel axle 12. The wheel seat 11 extends with two side plates 111, and the two side plates 111 are provided with a through hole 1111. The wheel axle 12 passes through the through hole 1111, and the roller 13 is installed between the two side plates 111. The roller 13 is provided with a wheel frame 131, and an outer wheel 132 is connected to the outer periphery of the wheel frame 131. A shaft hole 1311 is provided at the center of the wheel frame 131, through which the wheel axle 12 passes, so that the roller 13 can rotate freely on the wheel axle 12. A plurality of radially arranged elastic baffles 1313 are arranged around one side of the wheel frame 131 near the edge, and the plurality of elastic baffles 1313 rotate with the roller 13.

[0045] The deceleration unit 20 includes a fixed base 24, a sliding member 25, and a side cover 26. The fixed base 24 is located on one side of the roller 13 and has a sliding hole 241. The sliding member 25 is slidably disposed in the sliding hole 241. A limiting groove 251 is provided in the middle section of the sliding member 25, which allows the sliding member 25 to slide within a limited range along the sliding hole 241. A stop 252 is provided at the front end of the sliding member 25. The side cover 26 is located on one side of the roller 13 and is assembled with the fixed base 24. The side cover 26 covers the fixed base 21 and the sliding member 22, so that the sliding hole 241 of the fixed base 24 is at a horizontal angle in the normal state. The side cover 26 has a through hole 261 at its center for the axle 12 to pass through. The side cover 26 also has an arc-shaped elongated hole 262 for two screws 263 to pass through and lock onto one of the side plates 111, so that the side cover 26 is connected to the wheel seat 11, and the wheel seat 11 can swing relative to the side cover 26 within the range of the arc-shaped elongated hole 262. The limiting groove 251 has a first end 2511 and a second end 2512, and the limiting range is the interval between the first end 2511 and the second end 2512.

[0046] In use, the automatic reduction wheel 1 can be installed on the wheelchair 2 (e.g., Figure 7 (as shown) or walking aid 3 (such as Figure 8 As shown), when the wheelchair 2 or walking aid 3 is traveling on flat ground, the stop 252 of the sliding member 25 is not on the rotation path of the multiple elastic baffles 1313 (as shown). Figure 11 (as shown), and can proceed normally; as Figure 12 and Figure 13As shown, when the wheelchair 2 or the walker 3 travels downhill, the sliding hole 241 tilts downwards. The sliding member 25 slides along the sliding hole 241 under gravity, causing the stop 252 of the sliding member 25 to protrude out of the outside of the sliding hole 241 and move onto the rotation path of multiple elastic baffles 1313. The stop 252 blocks the multiple elastic baffles 1313. With the elastic deformation and elastic recovery of the elastic baffles 1313, the elastic baffles 1313 deform one by one and pass through the stop 252, and return to their original shape after passing through, thus achieving the effect of deceleration.

[0047] In addition, such as Figures 11 to 13 As shown, the limiting groove 251 has a first end 2511 and a second end 2512. The side edge of the wheel axle 12 is engaged in the limiting groove 251. When the sliding hole 241 forms a downward tilt angle, the second end 2512 of the limiting groove 251 can abut against the side edge of the wheel axle 12, so that the sliding member 25 can be displaced within the limiting range and prevent the sliding member 25 from falling out of the sliding hole 241.

[0048] The following benefits can be obtained from the structure of the above specific embodiments:

[0049] The automatic deceleration wheel 1 of the present invention can be installed on a mobile vehicle such as a wheelchair 2 or a walking aid 3. When traveling downhill, it automatically generates a deceleration effect to prevent sudden acceleration and avoid injury to the user due to excessive downhill speed, thereby improving safety.

Claims

1. An automatic reduction wheel body, comprising: A wheel unit includes a wheel seat, an axle passing through the wheel seat, and a roller rotatable around the axle. The wheel seat has a through hole through which the axle passes. One end of the axle has a non-circular section. The roller has a rim, and an outer wheel is attached to the outer periphery of the rim. A shaft hole is located at the center of the rim, through which the axle passes, allowing the roller to rotate freely on the axle. A plurality of radially arranged retaining plates are arranged near the edge of one side of the rim, and these retaining plates rotate with the roller. A deceleration unit includes a fixed base and a sliding member. The fixed base has a fixed hole and a sliding hole. The fixed hole is fixed to the non-circular section of the wheel axle, so that the fixed base is located on one side of the roller. The sliding member slides in the sliding hole and has a sliding body. The front end of the sliding body is connected to an elastic part, and the front end of the elastic part is connected to a stop. When the roller travels downhill, the sliding hole forms a downward tilt angle. The sliding member slides and displaces along the sliding hole by gravity, so that the stop of the sliding member protrudes out of the outside of the sliding hole and moves into the rotation path of the locking plates. Through the cooperation of the stop and the elasticity of the elastic part, the sliding member is pushed by the locking plates one by one to achieve the deceleration effect.

2. The automatic reduction wheel body according to claim 1, wherein, The wheel seat extends to have two side plates, and the fixing seat is installed between the two side plates.

3. The automatic reduction wheel body according to claim 1, wherein, The sliding hole is at a horizontal angle under normal conditions.

4. The automatic reduction wheel body according to claim 1, wherein, The elastic part is sheet-like.

5. The automatic reduction wheel body according to claim 1, wherein, The deceleration unit also includes a protective cover, which is located on one side of the roller and covers the fixed seat and the sliding member. The protective cover has an assembly hole at its center, which is fitted onto the non-circular segment for fixation.

6. An automatic reduction wheel body, comprising: A wheel unit includes a wheel seat, an axle passing through the wheel seat, and a roller rotatable around the axle. The wheel seat has a through hole through which the axle passes. The roller has a rim, and an outer wheel is attached to the outer periphery of the rim. A shaft hole is located at the center of the rim, through which the axle passes, allowing the roller to rotate freely on the axle. A plurality of radially arranged elastic baffles are arranged near the edge of one side of the rim, and these elastic baffles rotate with the roller. A deceleration unit includes a fixed base and a sliding member. The fixed base is located on one side of the roller and has a sliding hole. The sliding member slides within the sliding hole and has a stop at its front end. When the roller travels downhill, the sliding hole tilts downwards. The sliding member slides along the sliding hole under gravity, causing the stop to protrude outwards from the sliding hole and move onto the rotation path of the elastic baffles. The stop blocks the elastic baffles, and in conjunction with the elastic deformation and elastic recovery of the baffles, the baffles deform one by one to pass through the stop and return to their original shape after passing, thus achieving a deceleration effect.

7. The automatic reduction wheel body according to claim 6, wherein, The middle section of the slider is provided with a limiting groove, which allows the slider to slide within a limited range along the sliding hole.

8. The automatic reduction wheel body according to claim 6, wherein, The sliding hole is at a horizontal angle under normal conditions.

9. The automatic reduction wheel body according to claim 6, wherein, The wheel seat extends with two side plates. The deceleration unit also includes a side cover, which is located on one side of the roller. The side cover is assembled with the fixed seat and covers the fixed seat and the sliding member. The center of the side cover has a through hole for the wheel axle to pass through. The side cover has an arc-shaped elongated hole for two screws to pass through and lock onto one of the side plates, so that the side cover is connected to the wheel seat. The wheel seat can swing relative to the side cover within the range of the arc-shaped elongated hole.

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