CN210277528U

CN210277528U - Parking brake device and wheelchair adopting same

Info

Publication number: CN210277528U
Application number: CN201920160387.5U
Authority: CN
Inventors: 左依依
Original assignee: Changzhou Moben Intelligent Technology Co ltd
Current assignee: Changzhou Moben Intelligent Technology Co ltd
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2020-04-10
Anticipated expiration: 2029-01-30

Abstract

The utility model discloses a parking arresting gear and adopt this parking arresting gear's wheelchair thereof, parking arresting gear includes the spacing body that is used for fixing the locating part on the wheel, can with locating part block or separation and be used for driving spacing body and locating part block or the thrust unit who separates, thrust unit is electromagnetic switch, electromagnetic switch drives when circular telegram spacing body with the locating part separation drives during the outage spacing body with the locating part block. The utility model discloses parking arresting gear's locating part is connected in the wheel end cover, and thrust unit drives the spacing body block or separate in the locating part; wherein: when the limiting body is clamped on the limiting piece, the wheel is correspondingly limited to rotate by limiting the displacement of the wheel end cover; when the limiting body is separated from the limiting part, the limiting on the wheel end cover is released, and the wheel can rotate freely. Simple structure and convenient operation.

Description

Parking brake device and wheelchair adopting same

Technical Field

The invention relates to the technical field of parking braking, in particular to a parking braking device arranged on a wheel.

Background

The existing vehicle is prevented from sliding by controlling the hand brake to limit the movement of the vehicle after parking, and the parking safety of the vehicle is improved. However, the manual brake is complicated to control and needs a lot of physical power.

Disclosure of Invention

The invention aims to provide a parking brake device convenient to operate and control.

In order to solve the technical problems, the invention provides the following technical scheme: a parking braking device comprises a limiting part fixed on a wheel, a limiting body capable of being clamped or separated with the limiting part and a pushing device for driving the limiting body to be clamped or separated with the limiting part.

Compared with the prior art, the invention has the following beneficial effects: the limiting part of the parking braking device is connected with the wheel end cover, and the pushing device drives the limiting body to be clamped or separated from the limiting part; wherein: when the limiting body is clamped on the limiting piece, the wheel is correspondingly limited to rotate by limiting the displacement of the wheel end cover; when the limiting body is separated from the limiting part, the limiting on the wheel end cover is released, and the wheel can rotate freely. Simple structure and convenient operation.

Preferably, the limiting part is an annular end face fluted disc which is sleeved on the wheel axle of the wheel.

Preferably, the limiting body is sleeved on the wheel axle and located at the outer side of the limiting part, and comprises a sliding shaft sleeve connected to the pushing device and a clamping body clamped with the limiting part.

Preferably, the clamping body is an end face fluted disc.

Preferably, the pushing device is an electromagnetic switch connected to a wheel axle of the wheel, the electromagnetic switch drives the limiting body to separate from the limiting part when powered on, and the electromagnetic switch drives the limiting body to be clamped with the limiting part when powered off.

Preferably, the electromagnetic switch includes a tubular housing for connecting with a wheel axle, an electromagnetic coil wound around an inner wall of the tubular housing and driving the sliding sleeve to move toward the inside of the tubular housing, and a compression spring supporting the clip body and capable of moving toward the outside of the tubular housing, and the tubular housing is provided with a sliding space for accommodating displacement of the sliding sleeve.

Preferably, one end of the compression spring abuts against the outer end face of the tubular shell, and the other end of the compression spring is sleeved on the periphery of the sliding shaft sleeve and abuts against the end face of the clamping body opposite to the tubular shell.

The invention also provides a wheelchair adopting the parking brake device, which comprises a chair frame and wheels arranged on the chair frame, wherein at least one wheel is provided with the parking brake device, and the chair frame is provided with a parking switch electrically connected with the parking brake device.

Preferably, the wheelchair is an electric wheelchair comprising four wheels, two of the four wheels are power wheels, the two power wheels are mounted on the front side or the rear side of the chair frame, and the electric wheelchair comprises a handheld manipulator for respectively controlling the two power wheels to rotate; the handheld manipulator comprises a power switch for starting and closing the electric wheelchair, and the parking switch is connected in series with the power switch.

Preferably, the parking brake device is mounted to both of the two power wheels.

Drawings

FIG. 1 is a schematic perspective view of a parking brake apparatus according to a first embodiment of the present invention;

FIG. 2 is a perspective view of a parking brake device coupled to a wheel according to one embodiment;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an exploded view of the parking brake device coupled to a wheel according to one embodiment;

FIG. 5 is a schematic view illustrating a stopper engaged with a stopper according to an embodiment of the disclosure;

FIG. 6 is a schematic view illustrating a spacing body separated from a spacing member according to an embodiment;

FIG. 7 is a perspective view of a wheelchair having a parking brake apparatus according to a first embodiment of the present invention;

FIG. 8 is a rear perspective view of a wheelchair having a parking brake apparatus according to one embodiment of the present invention;

FIG. 9 is a perspective view of the parking brake device coupled to a wheel according to the second embodiment;

fig. 10 is a rear view schematically showing the parking brake device attached to the wheel in the second embodiment.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and is not intended to limit the scope of the invention. The terms "front", "back", "left", "right", "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 and 2, the present embodiment provides a parking brake device, including a limiting member 1 fixed on a wheel 4, a limiting body 2 capable of engaging with or disengaging from the limiting member 1, and a pushing device 3 for driving the limiting body 2 to engage with or disengage from the limiting member 1. When wheel 4 rotates around the shaft axle center, wheel end cover 41 rotates around the shaft axle center along with wheel 4, and locating part 1 fixed connection in wheel end cover 41, thrust unit 3 drive 2 blocks of spacing body or separate in locating part 1, wherein: when the limiting body 2 is clamped with the limiting part 1 (as shown in fig. 5), the parking brake function of the vehicle can be realized by limiting the wheel end cover 41 to move and correspondingly limiting the wheel 4 to rotate; when the limiting body 2 is separated from the limiting body 1 (as shown in fig. 6), the limitation on the wheel end cover 41 is released, and the wheel 4 can rotate freely and can push the vehicle to move. The limiting body 2 and the pushing device 3 of the parking braking device can be mounted on a frame or a wheel shaft, and the parking braking device is simple in structure and convenient to operate and control. It should be noted that: the limiting member 1 may also be integrally molded with the wheel cover 41.

Example one

Referring to fig. 2, 3 and 4, in the present embodiment, the wheel 4 includes a left wheel cover and a right wheel cover. The left and right wheel end caps are rotatably connected to the wheel axle 42 by bearings, respectively. The wheel axle 42 has two ends protruding from the two wheel covers 41 and extending outward. The limiting member 1 is mounted on the left wheel end cover, but may also be mounted on the right wheel end cover. The limiting piece 1 is provided with a through hole for the wheel axle 42 to pass through. The limiting member 1 is annular, and the annular limiting member 1 is sleeved on the wheel axle 42 and is fixedly connected to the left wheel end cover through a fastener. The fastener is a screw. The limiting body 2 is also provided with a through hole for the wheel axle 42 to pass through. The limiting body 2 is sleeved on the wheel axle 42 and is located on the outer side of the limiting part 1. The limiting body 2 is arranged corresponding to the limiting part 1. The limiting body 2 comprises a sliding shaft sleeve 21 connected to the pushing device 3 and a clamping body 22 clamped with the limiting part 1. The pushing device 3 is an electromagnetic switch connected to the wheel axle 42, and the electromagnetic switch is fixedly connected to the wheel axle 42 through a fastener. When the electromagnetic switch is powered on, the limiting body 2 is driven to separate from the limiting member 1 (as shown in fig. 6), that is, the card body 22 of the limiting body 2 is separated from the limiting member 1; when the electromagnetic switch is powered off, the limiting body 2 is driven to engage with the limiting member 1 (as shown in fig. 5), that is, the engaging body 22 of the limiting body 2 engages with the limiting member 1, so as to limit the wheel 4 to rotate. Of course, in other embodiments, the pushing device 3 may also be an electric push rod or an air cylinder.

Referring to fig. 3, in the present embodiment, the electromagnetic switch includes a tubular housing 31 for connecting with the wheel axle 42, an electromagnetic coil 32 wound around an inner wall of the tubular housing 31 and driving the sliding sleeve 21 to move toward the inside of the tubular housing 31, and a compression spring 33 supporting the clamping body 22 and capable of moving toward the outside of the tubular housing 31. The end of the wheel axle 42 is provided with an internally threaded hole 43 and abuts against the inner bottom wall of the tubular housing 31, the inner bottom wall is provided with a through hole 34 for mounting the screw 30, and the screw 30 extends into the through hole 34 of the inner bottom wall and is in threaded connection with the wheel axle 42, so that the tubular housing 31 is fixedly connected with the wheel axle 42. The tubular housing 31 is provided with a sliding space for allowing the sliding sleeve 21 to move, facilitating the axial movement of the sliding sleeve 21 relative to the wheel axle 42. The compression spring 33 is located between the tubular housing 31 and the card body 22. One end of the compression spring 33 abuts against the outer end face of the tubular shell 31, and the other end of the compression spring 33 is sleeved on the outer periphery of the sliding shaft sleeve 21 and abuts against the end face of the card body 22 opposite to the tubular shell 31. When the electromagnetic switch is powered on, the electromagnetic coil 32 generates electromagnetic attraction, the sliding shaft sleeve 21 is equivalent to the movable iron core and moves towards the inside of the tubular shell 31, meanwhile, the compression spring 33 is extruded between the tubular shell 31 and the clamping body 22 and is in a compression state, and the clamping body 22 of the limiting body 2 is separated from the limiting part 1; when the electromagnetic switch is powered off, the compression spring 33 in the compressed state is released, the compression spring 33 pushes the clip body 22 to move towards the outside of the tubular shell 31 through the stretching force, and the clip body 22 of the limiting body 2 is clamped on the limiting member 1.

In this embodiment, the limiting member 1 is an annular end-face toothed disc that is sleeved on the wheel axle 42. The clip body 22 is an end-face toothed disc connected to the sliding sleeve 21 and slidable relative to the wheel axle 42. The end-toothed disc is also called a mouse tooth disc or an end-toothed disc. Through the two groups of mutually meshed clamping teeth, the clamping performance of the limiting body 2 and the limiting part 1 is improved, the friction force between the limiting part 1 and the clamping body 22 is increased, and the clamping reliability is improved.

Referring to fig. 4, in the present embodiment, the wheel axle 42 includes an axle body connecting the two wheel covers 41 and an axle flat body 44 protruding from the wheel covers 41 and connected to the parking brake device. The shaft flat body 44 is formed by machining two corresponding planes on the shaft body by using a milling cutter. The through hole arranged on the limiting body 2 and used for allowing the wheel axle 42 to penetrate through is a waist-shaped through hole 23, the waist-shaped through hole 23 is matched with the axle flat body 44 of the wheel axle 42, the limiting body 2 is sleeved on the axle flat body 44 through the waist-shaped through hole 23 so as to limit the radial rotation of the limiting body 2 relative to the wheel axle 42, and the clamping positions of the clamping body 22 and the limiting part 1 correspond to each other and are convenient to clamp.

Referring to fig. 7, the invention further provides a wheelchair using the parking brake device, which comprises a chair frame 5 and four wheels 6 mounted on the chair frame 5. Two wheels 6 of the four wheels 6 are mounted on the front side of the seat frame 5, and the other two wheels 6 of the four wheels 6 are mounted on the rear side of the seat frame 5. At least one wheel 6 is equipped with a parking brake device. The chair frame 5 is provided with a parking switch electrically connected to the parking brake device. When the wheelchair is parked, a user closes the parking switch, the electromagnetic switch is powered off, and the limiting body 2 is clamped on the limiting piece 1, so that the parking function of the wheelchair is realized; when the wheelchair needs to be moved, a user turns on the parking switch, the electromagnetic switch is powered on, and the limiting body 2 is separated from the limiting piece 1, so that the wheelchair is convenient to move; simple structure, convenient control, can save user's physical power compared with the manual brake to convenient the disabled user controls.

In the present embodiment, the wheelchair is an electric wheelchair driven by electric power. Two wheels 6 of the four wheels 6 are power wheels 61, and two power wheels 61 are mounted on the rear side of the seat frame 5. Of course, the two power wheels 61 may be mounted on the front side of the chair frame 5. The other two wheels 6 of the four wheels 6 are driven wheels 62, and the driven wheels 62 can be driven by the two power wheels 61 to rotate. The electric wheelchair includes a hand-held manipulator 7 for controlling the rotation of two power wheels 61, respectively. The hand-held manipulator 7 includes a power switch for turning on and off the electric wheelchair. The parking switch is connected in series with the power switch, so that the parking function of the wheelchair can be realized simultaneously when a user turns off the electric wheelchair; when a user opens the electric wheelchair, the limiting body 2 is separated from the limiting part 1, and the electric wheelchair moves through electric power.

In this embodiment, the parking brake devices are installed on both the two power wheels 61, so that the parking reliability of the electric wheelchair is improved. The two parking brake devices are located outside the seat frame 5, as shown in fig. 8. The power wheel 61 is a hub motor wheel. Of course, in other embodiments, two parking brake devices may be located on the inner side of the seat frame 5.

Example two

Referring to fig. 9 and 10, the difference between the second embodiment and the first embodiment is: the limiting part and the wheel end cover 41 are integrally formed, and the limiting body 8 and the pushing device 9 of the parking braking device are installed on the frame 10.

In this embodiment, the wheel end cover 41 is provided with a plurality of limiting holes 45 surrounding the periphery of the wheel axle 42, and the plurality of limiting holes 45 use the axle center of the wheel axle 42 as the center of a circle. The wheel end cover 42 provided with the plurality of limit holes 45 constitutes a limit member engaged with the limit body 8. In other embodiments, the limiting member may also be an annular plate, and the annular plate is provided with a plurality of limiting holes 45, and the limiting member is configured to be fixedly connected to the wheel end cover 41. The wheel axle 42 is fixedly connected to the frame 10 to mount the wheel 4. The limiting body 8 is connected with the frame 10 in a sliding way, and the pushing device 9 is fixedly connected with the frame 10. The limiting body 8 comprises a limiting rod 81 matched with the limiting hole 45 and a boosting plate 82 connected to the pushing device 9. The frame 10 is provided with a through hole through which the limit lever 81 passes. The pushing device 9 drives the position-limiting body 8 to be engaged with or disengaged from the position-limiting member.

Finally, it should be noted that: the above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention; thus, although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.

Claims

1. A parking brake device characterized in that: comprises a limiting part fixed on the wheel, a limiting body capable of being clamped or separated with the limiting part and a pushing device for driving the limiting body to be clamped or separated with the limiting part; the pushing device is an electromagnetic switch, the electromagnetic switch drives the limiting body to separate from the limiting part when the electromagnetic switch is powered on, and drives the limiting body to be clamped with the limiting part when the electromagnetic switch is powered off.

2. The parking brake device according to claim 1, characterized in that: the limiting piece is an annular end face fluted disc which is sleeved on the wheel axle of the wheel.

3. The parking brake device according to claim 2, characterized in that: the limiting body is sleeved on the wheel axle and located on the outer side of the limiting part, and comprises a sliding shaft sleeve connected to the pushing device and a clamping body clamped with the limiting part.

4. The parking brake device according to claim 3, characterized in that: the clamp body is an end face fluted disc.

5. The parking brake device according to claim 3, characterized in that: the electromagnetic switch is connected to the wheel axle.

6. The parking brake device according to claim 5, characterized in that: the electromagnetic switch comprises a tubular shell connected with a wheel axle, an electromagnetic coil wound on the inner wall of the tubular shell and driving the sliding shaft sleeve to move towards the inside of the tubular shell, and a compression spring supporting the clamping body and capable of moving towards the outside of the tubular shell, wherein the tubular shell is provided with a sliding space for accommodating the displacement of the sliding shaft sleeve.

7. The parking brake device according to claim 6, characterized in that: one end of the compression spring abuts against the outer end face of the tubular shell, and the other end of the compression spring is sleeved on the periphery of the sliding shaft sleeve and abuts against the end face of the clamping body opposite to the tubular shell.

8. A wheelchair employing the parking brake apparatus as claimed in any one of claims 1 to 7, characterized in that: the parking brake device comprises a chair frame and wheels arranged on the chair frame, wherein at least one wheel is arranged on the parking brake device, and a parking switch electrically connected with the parking brake device is arranged on the chair frame.

9. The wheelchair of claim 8 wherein: the wheelchair is an electric wheelchair comprising four wheels, two of the four wheels are power wheels, the two power wheels are arranged on the front side or the rear side of the chair frame, and the electric wheelchair comprises a handheld manipulator which respectively controls the two power wheels to rotate; the handheld manipulator comprises a power switch for starting and closing the electric wheelchair, and the parking switch is connected in series with the power switch.

10. The wheelchair of claim 9 wherein: the parking braking device is installed on both the two power wheels.