JP6568987B1 - Wheelbarrow speed reducer and wheelbarrow using the same - Google Patents

Abstract

A handcart speed reducing device that provides a buffering function by magnetic resistance when moving and a handcart using the same. A handcart speed reduction device is applied to a wheel shaft of a handcart, and includes a wheel, a driven gear, a reluctance motor, and a resistance element. The wheel 400 includes a drive gear 410 that is pivotally attached to the wheel shaft and that rotates as the wheel 400 rotates. The driven gear 500 is located on one side of the wheel shaft, and the driven gear 500 is driven by being engaged with the drive gear 410 and has a connection portion 510. The reluctance motor 600 is connected to the connecting portion 510 and driven by the driven gear 500. Resistance element 700 is electrically connected to the permanent magnet. [Selection] Figure 4A

Description

  The present invention relates to a handcart speed reduction device and a handcart using the same, and more particularly to a handcart speed reduction device that provides a buffering function by magnetic resistance when moving, and a handcart using the same.

  A wheelbarrow is a product widely used in, for example, a shopping cart, a stroller, a walker, a wheelchair, and the like used in a sales area such as a supermarket. Some conventional wheelbarrows have a bicycle parking function in addition to the inherent functions of loading and facilitating movement.

  However, the conventional wheelbarrow structure can only be switched between a freely movable state and a parking state, and generally has no mechanism that can decelerate according to various situations. . For example, when using a wheelbarrow on an uphill, the user does not have a speed reduction mechanism, so if the user does not continue to push the wheelbarrow, there is a risk that the user will be pushed back and bumped, causing the user to be seriously injured. .

  In addition, due to the characteristics of the product, when the wheelbarrow is used on a downhill, the user must move forward while pulling the wheelbarrow, so it is difficult to maintain the posture and more force is required, It was not easy to control the wheelbarrow. In addition, when the wheelbarrow becomes uncontrollable due to a human error, there is a possibility that the user cannot catch up with the wheelbarrow that falls down vigorously. In particular, in the case of wheelchairs, strollers, etc., most people who use them cannot react immediately, and there is a risk that an irreversible accident will occur and serious injury will occur.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a handcart speed reducing device and a handcart using the same, by combining a reluctance motor with a resistance element, generating resistance on the wheel shaft of the handcart, and providing the handcart with a buffering function for deceleration. There is.

  In order to solve the above-mentioned problem, according to the first embodiment of the present invention, it is applied to a wheel shaft of a handcart, and is a handcart speed reduction device including a wheel, a driven gear, a reluctance motor, and a resistance element, The wheel is rotatably attached to the wheel shaft and has a drive gear that rotates as the wheel rotates, the driven gear is located on one side of the wheel shaft, and the driven gear is The reluctance motor is connected to the connection portion and driven by the driven gear, and is driven by the driven gear and meshed with the drive gear, and is similar to the plurality of permanent magnets and the permanent magnet. There is provided a handcart speed reducer characterized in that the resistance element is electrically connected to the permanent magnet. .

  The drive gear is preferably a ring gear or a sun gear.

  Preferably, the resistance element is a variable resistor, and further includes a controller that adjusts a resistance value of the resistance element.

  It is preferable to further comprise a housing provided on the wheel and covering the drive gear and the driven gear.

  It is preferable to further include a transmission gear set that is connected to the reluctance motor and indirectly connected to the connection portion.

  The transmission gear set includes a sun gear and a plurality of planetary gears, the sun gear is connected to and driven by the reluctance motor, the planetary gear is meshed with the sun gear, and the number of teeth of each planetary gear Is more than the number of teeth of the sun gear.

  It is preferable to further include a power storage unit that is electrically connected to the reluctance motor and receives power when the reluctance motor rotates.

  It is preferable to further include an electronic device connected to the power storage unit.

  The electronic device is preferably a lighting fixture or a display device.

  In order to solve the above-described problem, according to a second embodiment of the present invention, there is provided a handcart including a frame and a plurality of handcart speed reduction devices according to any one of claims 1 to 6, wherein The frame has a plurality of wheel shafts, and the handcart speed reducer is less than or equal to the number of the wheel shafts and is disposed corresponding to the wheel shafts. .

  In order to solve the above-mentioned problem, according to a third aspect of the present invention, there is provided a handcart including a frame and a plurality of handcart speed reducers according to claim 7, wherein the frame includes a plurality of wheel shafts. And the handcart speed reducer is less than or equal to the number of the wheel shafts, and is disposed corresponding to the wheel shafts.

  The wheelbarrow speed reduction device of the present invention and the wheelbarrow to which the wheelbarrow is applied combine a resistance element with a reluctance motor, generate resistance on the wheel shaft of the wheelbarrow, and provide the wheelbarrow with a buffering function for deceleration.

It is a disassembled perspective view which shows the handcart speed reducer which concerns on one Embodiment of this invention. It is a perspective view (1) which shows the state which the drive gear of the handcart speed reducer of FIG. 1 drives a driven gear. It is a perspective view (2) which shows the state which the drive gear of the handcart speed reducer of FIG. 1 drives a driven gear. It is explanatory drawing (1) which shows the structure of the reluctance motor of the handcart speed reducer of FIG. It is explanatory drawing (2) which shows the structure of the reluctance motor of the handcart speed reducer of FIG. It is a disassembled perspective view which shows the state by which the driven gear of the handcart speed reducer of FIG. 1 is connected with a reluctance motor. It is a perspective view which shows the state which the wheel of the handcart speed reducer of FIG. 1 drives a reluctance motor. It is a disassembled perspective view which shows the reluctance motor which concerns on one Embodiment of this invention, a transmission gear, and a driven gear. It is a perspective view which shows the handcart which concerns on other embodiment of this invention.

  Hereinafter, specific embodiments will be described in detail with reference to the drawings in order to make the objects, features, and effects of the present invention easier to understand.

  Please refer to FIG. As shown in FIG. 1, the handcart speed reduction device 300 is applied to the handcart 100, and the frame 200 of the handcart 100 includes a plurality of wheel shafts 210. The handcart speed reducer 300 may be single or plural, and some or all of them may be attached to the wheel shaft 210.

As shown in FIG. 1, the handcart speed reduction device 300 includes wheels 400, a driven gear 500, a reluctance motor 600, and a resistance element 700. Please refer to FIG. 2A and FIG. 2B together. When the axis of the wheel 400 is pivotally attached to the wheel shaft 210 of the frame 200 and the handcart 100 is pushed, the wheel 400 turns on the wheel shaft 210. As shown in FIGS. 2A and 2B, the wheel 400 includes a drive gear 410. The drive gear 410 may be the ring gear of FIG. 2A or the sun gear of FIG. 2B. The driven gear 500 is located on one side of the wheel shaft 210 and meshes with the drive gear 410. When the wheel 400 turns, the drive gear 410 turns the driven gear 500. Please refer to FIGS. 2A to 4B together. The driven gear 500 has a connection portion 510 into which the reluctance motor 600 is inserted, and transmits the power of the driven gear 500 to the reluctance motor 600.
The reluctance motor 600 includes a plurality of permanent magnets 610 and a metal member 620. The metal member 620 and the permanent magnet 610 are provided in an annular shape, and the metal member 620 rotates with respect to the permanent magnet 610. The permanent magnet 610 of the reluctance motor 600 may be an internal type (see FIG. 3A) or a surface type (see FIG. 3B). Resistance element 700 is electrically connected to reluctance motor 600. When the metal member 620 of the reluctance motor 600 turns, free electrons on the surface of the metal member 620 move relative to the permanent magnet 610, and the magnetic field of the permanent magnet 610 changes. Since resistance tends to change in the magnetic field, an eddy current is generated between the permanent magnet 610 and the metal member 620, and another magnetic field attracting the permanent magnet 610 is generated. Therefore, when the magnetic damping effect of the reluctance motor 600 is used, torque resistance is generated in the drive gear 410 in the present embodiment.

  Since the magnetic resistance does not need to be separately driven by electric power, the handcart speed reduction device 300 can always maintain the deceleration buffer effect. Another advantage of the above-described implementation method is that the drive gear 410 directly replaces the wheel rim of the product of the conventional wheelbarrow 100 and has very high versatility. Furthermore, since the driven gear 500 is provided on one side of the wheel shaft 210, the driven gear 500 can be directly accommodated in the wheel rim, and the volume of the wheel 400 of the handcart 100 does not increase significantly. As shown in FIGS. 4A and 4B, the handcart speed reduction device 300 may include a housing 310 that is disposed on the side of the wheel 400 and covers the drive gear 410 and the driven gear 500. In order to facilitate assembly and sales, the housing 310 may be formed in the shape shown in FIG. 4 to completely cover the reluctance motor 600 and the resistance element 700 in the handcart speed reduction device 300.

  Reference is again made to FIG. The handcart speed reduction device 300 may include a transmission gear set 630. The reluctance motor 600 is first connected to the transmission gear set 630 and then indirectly connected to the connection portion 510 of the driven gear 500. More specifically, the transmission gear set 630 may include a combination of a sun gear 631 and a plurality of planetary gears 632. The sun gear 631 meshes with the planetary gear 632, and the number of teeth of the planetary gear 632 is larger than the number of teeth of the sun gear 631. Since the connecting portion 510 is sequentially connected to the joint 633 and the plurality of planetary gears 632, the reluctance motor 600 is indirectly driven using the transmission gear set 630 when the driven gear 500 is driven to turn. Can do. The speed change gear set 630 of the handcart speed reduction device 300 can amplify the torque of the reluctance motor 600 and enhance the deceleration buffer effect.

  Reference is again made to FIG. The handcart speed reducing device 300 may include a power storage unit 710. The power storage unit 710 is electrically connected to the reluctance motor 600 and can receive power when the reluctance motor 600 turns. For this reason, when the handcart 100 becomes uncontrollable on an uphill or downhill, the handcart speed reducing device 300 can prevent the handcart 100 from falling down vigorously, and the handcart via the reluctance motor 600 can be prevented. The potential energy of the car 100 can be converted into electric energy and stored in the power storage unit 710.

  The handcart speed reduction device 300 uses the stored electric power and can operate without electric power. The handcart speed reduction device 300 may include the electronic device 900, and the handcart speed reduction device 300, the electronic device 900, and the power storage unit 710 may be attached to the handcart 100 of FIG. The electronic device 900 may be a lighting device such as an LED lamp so that a warning can be given even at night. As can be seen from the above description, when the metal member 620 rotates with respect to the permanent magnet 610, a magnetic damping effect occurs, preventing the metal member 620 from continuing to rotate, and the strength of magnetic damping is determined by the magnetic field. The Therefore, the resistance element 700 may include a variable resistor. When the resistance value of the resistance element 700 changes, the current generated by the permanent magnet 610 due to electromagnetic induction also changes, and the permanent magnet 610 becomes the metal member 620. It is possible to indirectly control the magnetic attractive force acting on the. Correspondingly, the handcart speed reducing device 300 may include a controller 800 that adjusts the resistance value of the resistance element 700. In another embodiment, the electronic device 900 may be a display device that displays the current resistance level. Of course, the electronic device 900 may be implemented in other products, and the embodiment described here does not limit the standards, the mounting position, or the application method of the power storage unit 710 and the electronic device 900 at all.

  As can be seen from the above, the handcart speed reduction device of the present invention and the handcart to which the handcart is applied can prevent the handcart from falling down vigorously because it becomes uncontrollable on an uphill or downhill, The comfort when the user operates can also be improved. Further, the handcart speed reducer is highly versatile because it can be attached to the wheel rim of a conventional handcart or directly replaced. Further, in the present invention, the wheelbarrow speed reducing device may be formed into a small generator structure using the internal space of the wheel rim of the wheelbarrow, and power necessary for peripheral electronic devices may be supplementarily provided.

  While the preferred embodiments of the present invention have been disclosed above, as may be appreciated by those skilled in the art, they are not intended to limit the invention in any way. Various changes and modifications can be made without departing from the spirit and scope of the present invention. Accordingly, the scope of the claims of the present invention should be construed broadly including such changes and modifications.

DESCRIPTION OF SYMBOLS 100 Wheelbarrow 200 Frame 210 Wheel shaft 300 Wheelbarrow speed reducer 310 Case 400 Wheel 410 Drive gear 500 Driven gear 510 Connection part 600 Reluctance motor 610 Permanent magnet 620 Metal member 630 Transmission gear set 631 Sun gear 632 Planetary gear 633 Joint 700 Resistance element 710 Power storage unit 800 Controller 900 Electronic device

Claims (11)

A wheelbarrow speed reduction device that is applied to a wheel shaft of a wheelbarrow and includes a wheel, a driven gear, a reluctance motor, and a resistance element,
The wheel is rotatably attached to the wheel shaft and has a drive gear that rotates as the wheel rotates,
The driven gear is located on one side of the wheel shaft, the driven gear is driven by being meshed with the drive gear, and has a connecting portion,
The reluctance motor is connected to the connecting portion and driven by the driven gear, and a plurality of permanent magnets and a plurality of metal members that are provided in an annular shape like the permanent magnets and rotate with respect to the permanent magnets. Have
The handcart speed reducing device, wherein the resistance element is electrically connected to the permanent magnet.   The handcart speed reducer according to claim 1, wherein the drive gear is a ring gear or a sun gear. The resistive element is a variable resistor,
The handcart speed reducer according to claim 1, further comprising a controller that adjusts a resistance value of the resistance element.   The handcart speed reducer according to claim 1, further comprising a housing provided on the wheel and covering the drive gear and the driven gear.   The handcart speed reduction device according to claim 1, further comprising a transmission gear set connected to the reluctance motor and indirectly connected to the connection portion. The transmission gear set has a sun gear and a plurality of planetary gears,
The sun gear is connected to and driven by the reluctance motor;
6. The handcart speed reducer according to claim 5, wherein the planetary gear is meshed with the sun gear, and the number of teeth of each planetary gear is greater than the number of teeth of the sun gear.   The handcart speed reduction device according to claim 1 or 6, further comprising a power storage unit that is electrically connected to the reluctance motor and receives power when the reluctance motor turns.   The handcart speed reducer according to claim 7, further comprising an electronic device connected to the power storage unit.   The handcart reduction device according to claim 8, wherein the electronic device is a lighting fixture or a display device. A handcart provided with a frame and a plurality of handcart speed reducers according to any one of claims 1 to 6,
The frame has a plurality of wheel shafts,
The handcart speed reducer is less than or equal to the number of the wheel shafts, and is disposed corresponding to the wheel shafts. A handcart provided with a frame and a plurality of handcart speed reducers according to claim 7,
The frame has a plurality of wheel shafts,
The handcart speed reducer is less than or equal to the number of the wheel shafts, and is disposed corresponding to the wheel shafts.

Images