JP2023176896A - Power-assisted dolly - Google Patents

Abstract

To enable a user to recognize an inclination angle of a power-assisted dolly.SOLUTION: A power-assisted dolly includes: at least four wheels including driving wheels; a loading platform supported by the wheels; a handle having a left pillar section and a right pillar section extending upward from a rear part of the loading platform and a grip part extending in a lateral direction at a higher position than the left pillar section and the right pillar section; a motor which rotates the driving wheels; and an inclination indicator which measures an inclination angle as seen in an anteroposterior direction of the loading platform relative to a horizontal surface.SELECTED DRAWING: Figure 1

Description

The technology disclosed herein relates to an electrically assisted trolley.

In the technical field related to electric assist carts, an electric assist hand cart as disclosed in Patent Document 1 is known.

Japanese Patent Application Publication No. 2006-290319

If a recommended value for the climbing angle or descending angle of the electric assist cart is determined by the manufacturer, it is preferable to make the user aware of the inclination angle of the electric assist cart.

The technology disclosed in this specification aims to make a user aware of the inclination angle of an electrically assisted trolley.

This specification discloses an electrically assisted trolley. The electrically assisted trolley includes at least three wheels including a driving wheel, a loading platform supported by the wheels, a handle having a grip section extending in the left and right direction above the rear of the loading platform, a motor for rotating the driving wheels, and a loading platform supported by the wheels. The vehicle may also include an inclination meter that measures the inclination angle of the loading platform in the longitudinal direction.

According to the technology disclosed in this specification, the user can be made aware of the inclination angle of the electrically assisted trolley.

FIG. 1 is a perspective view from the front showing an electrically assisted trolley according to an embodiment. FIG. 2 is a perspective view from the rear showing the electrically assisted trolley according to the embodiment. FIG. 3 is a diagram of the electrically assisted trolley according to the embodiment viewed from the right side. FIG. 4 is a diagram of the electrically assisted trolley according to the embodiment viewed from the left side. FIG. 5 is a diagram of the electrically assisted trolley according to the embodiment viewed from the front side. FIG. 6 is a diagram of the electrically assisted trolley according to the embodiment viewed from the rear side. FIG. 7 is a diagram of the electrically assisted trolley according to the embodiment viewed from above. FIG. 8 is a diagram of the electrically assisted trolley according to the embodiment viewed from below. FIG. 9 is a sectional view showing the electrically assisted trolley according to the embodiment. FIG. 10 is a perspective view showing the case body according to the embodiment. FIG. 11 is a perspective view from the front showing the drive wheel according to the embodiment. FIG. 12 is a sectional view showing the drive wheel according to the embodiment. FIG. 13 is a sectional view showing the drive wheel according to the embodiment. FIG. 14 is a perspective view from the rear showing the battery case according to the embodiment. FIG. 15 is a sectional view showing the battery case according to the embodiment. FIG. 16 is a diagram of the battery case according to the embodiment viewed from above. FIG. 17 is a sectional view showing a part of the battery case according to the embodiment. FIG. 18 is a sectional view showing a part of the battery case according to the embodiment. FIG. 19 is an exploded perspective view showing the battery case according to the embodiment. FIG. 20 is a perspective view from the rear showing the operating device according to the embodiment. FIG. 21 is a diagram of the operating device according to the embodiment viewed from above. FIG. 22 is an exploded perspective view showing the operating device according to the embodiment. FIG. 23 is a perspective sectional view showing the operating device according to the embodiment. FIG. 24 is a perspective view showing the connection mechanism according to the embodiment. FIG. 25 is a perspective view from the front showing the electrically assisted trolley in a folded state according to the embodiment. FIG. 26 is a perspective view from the rear showing the electric assist trolley in a folded state according to the embodiment. FIG. 27 is a diagram of the electrically assisted cart in a folded state according to the embodiment, viewed from the right side. FIG. 28 is a diagram illustrating a state in which the electrically assisted trolley according to the embodiment is in a folded state and standing on a floor surface. FIG. 29 is a perspective view from the front showing an electrically assisted trolley to which the table according to the embodiment is attached. FIG. 30 is a perspective view from the front showing the table and electric assist trolley according to the embodiment. FIG. 31 is a view from below of an electrically assisted trolley equipped with a table according to an embodiment. FIG. 32 is a sectional view showing a first modification of the angle adjustment mechanism according to the embodiment. FIG. 33 is a sectional view showing a second modification of the angle adjustment mechanism according to the embodiment. FIG. 34 is a sectional view showing a third modification of the angle adjustment mechanism according to the embodiment. FIG. 35 is a sectional view showing a fourth modification of the angle adjustment mechanism according to the embodiment. FIG. 36 is a sectional view showing a fifth modification of the angle adjustment mechanism according to the embodiment. FIG. 37 is a sectional view showing a fifth modification of the angle adjustment mechanism according to the embodiment.

In one or more embodiments, the electrically assisted trolley includes at least three wheels including a drive wheel, a loading platform supported by the wheels, and a handle having a grip portion extending in the left-right direction above the rear of the loading platform. The vehicle may include a motor that rotates the drive wheels and an inclination meter that measures the inclination angle of the loading platform in the longitudinal direction with respect to the horizontal plane.

With the above configuration, the inclination meter allows the user to recognize the inclination angle of the electrically assisted trolley. Of the three wheels, one may be a front wheel and two may be a rear wheel, or two may be a front wheel and one a rear wheel. Among the three wheels, one wheel may be a driving wheel, or two wheels may be a driving wheel. Note that the number of wheels may be four. Of the four wheels, two front wheels may be driving wheels, and two rear wheels may be driving wheels.

In one or more embodiments, the tilt meter may be located above the cargo platform.

In the above configuration, since the inclination meter is arranged at a high position, it becomes easier for the user to visually recognize the inclination meter.

In one or more embodiments, the tilt meter may be positioned between the left column and the right column.

In the above configuration, since the inclination meter is disposed at the center of the electrically assisted trolley in the left-right direction, it becomes easier for the user to visually recognize the inclination meter.

In one or more embodiments, the electrically assisted trolley is arranged between a battery mounting part in which a battery that supplies power to the motor is mounted, and a left pillar part and a right pillar part, and a battery mounting part that accommodates the battery mounting part. It may also include a case. The tilt meter may be provided on the battery case.

With the above configuration, the user can easily visually recognize the inclination meter.

In one or more embodiments, the electric assist trolley may include a back plate disposed between the left column and the right column. The battery case may be fixed to the rear surface of the back plate.

In the above configuration, since the inclination meter is disposed at the rear of the back plate, it becomes easier for the user to visually recognize the inclination meter.

In one or more embodiments, the battery case may include a case body fixed to the rear surface of the back plate, and a case cover that opens and closes an opening provided at the top of the case body. The tilt meter may be supported by the case cover.

With the above configuration, the user can easily visually recognize the inclination meter.

In one or more embodiments, the power assist trolley may include a meter case to which a tilt meter is secured. The inclination meter may be supported by the case cover via the meter case.

In the above configuration, the inclination meter is supported by the case cover via the meter case.

In one or more embodiments, the meter case may have a housing space in which the tilt meter is housed and an opening in which the top surface of the tilt meter is disposed.

In the above configuration, the inclination meter is protected by the meter case by being arranged in the housing space. A user can visually recognize the inclination meter through the opening in the meter case.

In one or more embodiments, the tilt meter may be a level tube. The bubble tube may be long in the front-back direction.

With the above configuration, the inclination meter is constructed at low cost.

In one or more embodiments, the level may be curved such that the center of the level is located above the ends of the level.

With the above configuration, even if the allowable value of the inclination angle is large, the vial can properly indicate the inclination angle. For example, if the level tube is straight, even if the electrically assisted trolley is slightly tilted (for example, even if the tilt angle is 1 degree), the bubbles will move to the end of the level tube, and the user will be forced to remove the bubbles. becomes invisible. That is, when the bubble tube is straight, the sensitivity of the inclination meter is too high, making it difficult to display the inclination angle up to, for example, 5 degrees. When the bubble tube has a curved shape that bulges upward, the bubbles do not move to the end of the bubble tube when the electrically assisted trolley is slightly inclined (for example, when the inclination angle is 1 degree). Therefore, the user can visually recognize the bubbles. Since the bubble tube has a curved shape that bulges upward, it is possible to display a tolerance of, for example, ±5 degrees.

In one or more embodiments, the electric assist trolley may include an angle adjustment mechanism that adjusts the inclination angle of the meter case in the front-rear direction with respect to the case cover.

With the above configuration, the tilt meter can be calibrated.

In one or more embodiments, the angle adjustment mechanism may include a resilient member disposed between the meter case and the case cover, and a screw that secures the meter case and the case cover. The elastic member may urge the meter case upwardly relative to the case cover. The inclination angle of the meter case may be adjusted by adjusting the amount of tightening of the screw.

With the above configuration, the tilt meter can be calibrated.

In one or more embodiments, the resilient member may include a coil spring disposed in a recess in the underside of the meter case.

With the above configuration, the meter case is appropriately biased upward.

In one or more embodiments, the resilient member may include a resilient body disposed around the screw.

With the above configuration, the meter case is appropriately biased upward.

In one or more embodiments, the resilient member may include a leaf spring disposed between the underside of the meter case and the case cover.

With the above configuration, the meter case is appropriately biased upward.

In one or more embodiments, the screws may be arranged in two to connect each of the front and rear portions of the meter case and the case cover. The inclination angle of the meter case may be adjusted by adjusting the tightening amount of each of the two screws.

With the above configuration, the tilt meter can be calibrated.

In one or more embodiments, a hook portion may be provided at the rear of the meter case that hooks onto at least a portion of the case cover. One screw may be arranged to connect the front part of the meter case and the case cover. The inclination angle of the meter case may be adjusted by adjusting the tightening amount of each screw.

With the above configuration, the tilt meter can be calibrated.

In one or more embodiments, two elastic members may be arranged in the front-back direction.

With the above configuration, the meter case is appropriately biased upward.

In one or more embodiments, the rear of the meter case may be pivotally connected to the case cover by a pin. One screw may be arranged to connect the front part of the meter case and the case cover. The inclination angle of the meter case may be adjusted by adjusting the tightening amount of each screw.

With the above configuration, the tilt meter can be calibrated.

In one or more embodiments, one elastic member may be disposed in the front-back direction. In the front-back direction, the distance between the elastic member and the screw may be shorter than the distance between the elastic member and the pin.

With the above configuration, the tilt meter can be calibrated.

Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiments. The components of the embodiments described below can be combined as appropriate. Furthermore, some components may not be used.

In the embodiment, the positional relationship of each part will be described using the terms "front", "rear", "left", "right", "upper", and "lower". These terms indicate relative positions or directions with respect to the center of the electric assist trolley 1.

[Overview of electric assist trolley]
FIG. 1 is a perspective view from the front showing an electrically assisted trolley 1 according to an embodiment. FIG. 2 is a perspective view from the rear showing the electrically assisted trolley 1 according to the embodiment. FIG. 3 is a diagram of the electrically assisted trolley 1 according to the embodiment viewed from the right side. FIG. 4 is a diagram of the electrically assisted trolley 1 according to the embodiment viewed from the left side. FIG. 5 is a diagram of the electrically assisted trolley 1 according to the embodiment viewed from the front side. FIG. 6 is a diagram of the electrically assisted trolley 1 according to the embodiment viewed from the rear side. FIG. 7 is a diagram of the electrically assisted trolley 1 according to the embodiment viewed from above. FIG. 8 is a diagram of the electrically assisted trolley 1 according to the embodiment viewed from below. FIG. 9 is a sectional view showing the electrically assisted trolley 1 according to the embodiment.

The electric assist trolley 1 is used, for example, to transport cargo in a factory. The electric assist cart 1 assists the user with the force with which the electric assist cart 1 is pushed by a rotational force generated by a motor 7, which will be described later. Note that the electric assist trolley 1 may be driven by the rotational force generated by the motor 7 without being pushed by the user. The electrically assisted trolley 1 is capable of performing assisted travel in which the motor 7 generates rotational force to assist the user. Note that the electrically assisted trolley 1 can also perform non-assisted traveling in which the rotational force of the motor 7 is not generated. A user can use the electrically assisted cart 1 as a push cart.

The electric assist trolley 1 includes a loading platform 2, a handle 3, a back plate 4, at least three wheels including a drive wheel 5 and a free wheel 6, a motor 7, a parking brake pedal 8, a headlight 9, It includes a taillight 10, a battery case 11, a tilt meter unit 12, an operating device 13, and a controller 14.

The cargo platform 2 supports the cargo from below. The luggage is placed on the upper surface of the loading platform 2. The loading platform 2 is substantially plate-shaped. The outer shape of the loading platform 2 is substantially rectangular. Rubber pads 15 are arranged at each of a plurality of positions on the upper surface of the loading platform 2. When the cargo comes into contact with the rubber pad 15, the cargo is prevented from sliding back and forth and left and right on the loading platform 2. Furthermore, a plurality of recesses 16 are provided on the upper surface of the loading platform 2, into which leg portions 61 of a table 60, which will be described later, are inserted. Furthermore, handle openings 17 into which the user can insert his/her hand are provided on each of the left, right, and front parts of the loading platform 2. The user can carry the electric assist trolley 1 by inserting his/her hand into the handle opening 17.

The handle 3 is connected to the rear part of the loading platform 2 via a connecting mechanism 18. The handle 3 includes a left column portion 3A extending upward from the left rear portion of the loading platform 2, a right column portion 3B extending upward from the right portion of the rear portion of the loading platform 2, and a portion located above the left column portion 3A and the right column portion 3B. A grip part 3C extending in the left-right direction, a left connecting part 3D connecting the upper end of the left pillar part 3A and the left end part of the grip part 3C, and an upper end part of the right pillar part 3B and the right end part of the grip part 3C. It has a right connecting part 3E that connects. The grip section 3C is arranged above and behind the left column section 3A and the right column section 3B. The grip portion 3C is held by the user. The user applies driving force to the electric assist cart 1 so that the electric assist cart 1 moves while holding the handle 3. Each of the left connecting portion 3D and the right connecting portion 3E slopes upward and rearward.

As shown in FIGS. 1 and 2, a bell 80 is attached to the handle 3. In the embodiment, the bell 80 is attached to the grip portion 3C on the left side of the operating device 13. Note that the bell 80 may be attached to the grip section 3C on the right side of the operating device 13, or may be attached to at least one of the left connecting section 3D, the right connecting section 3E, the left column section 3A, and the right column section 3B. It's okay to be hit. By ringing the bell 80, the user can notify third parties around the electrically assisted cart 1 of the presence of the electrically assisted cart 1. Note that, for convenience, the bell 80 is shown only in FIGS. 1 and 2.

The connection mechanism 18 rotatably supports the lower end of the handle 3 with respect to the loading platform 2 . The handle 3 rotates to change between a used state and a folded state. In use, the left column portion 3A and the right column portion 3B are each arranged so as to extend upward from the loading platform 2. The folded state is a state in which the grip portion 3C is rotated so as to approach the top surface of the loading platform 2. The coupling mechanism 18 locks the handle 3 so that it cannot rotate when the handle 3 is in use. The coupling mechanism 18 has a folding bar 19. When the folding bar 19 is moved downward by the user, the lock of the handle 3 is released, and the handle 3 can be rotated to change from the usage state to the folded state.

The back plate 4 can support the luggage placed on the loading platform 2 from the rear. The back plate 4 is arranged between the left pillar part 3A and the right pillar part 3B. The left end portion of the back plate 4 is fixed to the left column portion 3A. The right end portion of the back plate 4 is fixed to the right column portion 3B. The back plate 4 includes a front plate 4A and a rear plate 4B. With the left column 3A sandwiched between the left end of the front plate 4A and the left end of the rear plate 4B from the front and back direction, the left end of the front plate 4A and the left end of the rear plate 4B are connected via the left column 3A. and is fixed by a plurality of left-hand screws 4L. With the right column part 3B sandwiched between the right end part of the front plate 4A and the right end part of the rear plate 4B from the front and back direction, the right end part of the front plate 4A and the right end part of the rear plate 4B are connected through the right column part 3B. and is fixed by a plurality of right-handed screws R. Further, the center portion of the front plate 4A and the center portion of the rear plate 4B are fixed by a plurality of internal screws 4M. Thereby, the left end portion of the back plate 4 is fixed to the left column portion 3A, and the right end portion of the back plate 4 is fixed to the right column portion 3B.

Each of the driving wheels 5 and the free wheels 6 supports the loading platform 2 from below. The drive wheels 5 are arranged at the rear of the loading platform 2. Two drive wheels 5 are provided with an interval in the left-right direction. The drive wheel 5 is rotated by the rotational force generated by the motor 7. The free wheel 6 is arranged ahead of the drive wheel 5. Two free wheels 6 are provided at intervals in the left-right direction.

In the embodiment, the driving wheels 5 are the rear wheels of the electric assist truck 1, and the free wheels 6 are the front wheels of the electric assist truck 1. The drive wheel 5 is a fixed wheel, and the direction of the rotation axis of the drive wheel 5 is constant with respect to the loading platform 2. The direction of the rotation axis of the free wheel 6 can be moved relative to the loading platform 2. That is, the tires of the drive wheels 5 always extend in the front-rear direction, and the tires of the free wheels 6 can rotate back and forth or left and right.

Motor 7 is an electric motor. The motor 7 rotates the drive wheel 5. The drive wheel 5 is rotated by the rotational force generated by the motor 7.

FIG. 11 is a perspective view from the front showing the drive wheel 5 according to the embodiment. FIG. 12 is a sectional view showing the drive wheel 5 according to the embodiment, and corresponds to the sectional view taken along line AA in FIG. FIG. 13 is a sectional view showing the drive wheel 5 according to the embodiment, and corresponds to the sectional view taken along line BB in FIG.

In the embodiment, the motor 7 is arranged inside the drive wheel 5 . The motor 7 is a so-called in-wheel motor. The motor 7 includes a stator 21 arranged around a shaft 20 , a rotor 22 arranged around the stator 21 , and a housing 23 . As shown in FIGS. 1 and 2, the shaft 20 is supported by a bracket 24 fixed to the lower surface of the loading platform 2. As shown in FIGS. Stator 21 is fixed to shaft 20. The stator 21 has a plurality of teeth 21T. A coil (not shown) is wound around each of the plurality of teeth 21T. Housing 23 accommodates stator 21 and rotor 22. The housing 23 includes a left housing 23L and a right housing 23R. In the left-right direction, the rotor 22 is arranged between the left housing 23L and the right housing 23R. The left housing 23L and the right housing 23R are fixed with a plurality of screws 25. The housing 23 is rotatably supported by the shaft 20 via a bearing 26. The drive wheel 5 is fixed to the housing 23.

Parking brake pedal 8 is operated to lock drive wheels 5. The user can move the brake pedal 8 downward by pressing the brake pedal 8 with his or her foot. When the parking brake pedal 8 is moved downward, the parking brake pin 8P comes into contact with the tire of the drive wheel 5, thereby locking the drive wheel 5 and making the drive wheel 5 unable to rotate. By moving the parking brake pedal 8 upward, the drive wheel 5 is unlocked and becomes rotatable.

The headlight 9 is arranged on the left side of the front of the loading platform 2. The headlight 9 illuminates the front of the loading platform 2. The headlight 9 outputs white light. The headlight 9 allows the user to smoothly use the electric assist trolley 1 even in a dimly lit warehouse or the like.

The tail light 10 is arranged on the left side of the rear plate 4B of the back plate 4. The tail light 10 outputs red light.

The battery case 11 accommodates a battery mounting section 27 and a battery 28 mounted on the battery mounting section 27. The battery case 11 is arranged above the loading platform 2. The battery case 11 is arranged between the left column section 3A and the right column section 3B. The battery case 11 is fixed to the rear surface of the back plate 4. The battery case 11 includes a case body 11A that is integrally formed with the rear plate 4B, and a case cover 11B that opens and closes an opening provided at the top of the case body 11A. Case cover 11B is rotatably supported by case body 11A via hinge 11C. The hinge 11C connects the rear part of the case body 11A and the rear part of the case cover 11B. By rotating the case cover 11B backward, the opening of the case body 11A is opened.

The battery mounting portion 27 is arranged on the inner surface of the case body 11A. The battery mounting portion 27 is arranged inside the case body 11A so as to face rearward. The battery mounting portion 27 is separate from the case body 11A. The battery mounting portion 27 is fixed to the case body 11A.

The battery 28 is a battery for a power tool. The battery 28 can also be used as a power source for a power tool. Examples of the power tool include an impact driver, impact wrench, driver drill, angle drill, hammer drill, circular saw, and light. The battery 28 supplies power to at least the motor 7 while being attached to the battery attachment part 27 . The battery 28 is attached to the battery attachment part 27 and supplies power to the electrical equipment or electronic equipment mounted on the electric assist trolley 1 . Electrical or electronic equipment powered by battery 28 includes headlights 9 and taillights 10. Battery 28 includes a lithium ion battery. Battery 28 is a rechargeable battery. The battery mounting portion 27 has a structure similar to that of a battery mounting portion of a power tool. The battery 28 can be attached to and detached from the battery mounting section 27. Battery 28 is charged by an external charger.

The user of the electric assist trolley 1 can carry out the work of mounting the battery 28 on the battery mounting part 27 and the work of removing the battery 28 from the battery mounting part 27. The battery mounting section 27 includes a guide member that guides the battery 28 in the vertical direction, and a main body terminal that is connected to a battery terminal provided on the battery 28. The user can attach the battery 28 to the battery attachment section 27 by inserting the battery 28 into the battery attachment section 27 from above through the opening of the case body 11A. The battery 28 is inserted into the battery mounting portion 27 while being guided by the guide member. By attaching the battery 28 to the battery attachment part 27, the battery terminal of the battery 28 and the main body terminal of the battery attachment part 27 are electrically connected. The user of the electric assist trolley 1 can remove the battery 28 from the battery mounting portion 27 by moving the battery 28 upward.

FIG. 10 is a perspective view showing the case body 11A according to the embodiment. As shown in FIG. 10, a pair of leaf springs 11H are arranged on the bottom surface of the case body 11A. A portion of the leaf spring 11H is fixed to the bottom surface of the main body 11A with a screw 11J. The leaf spring 11H generates elastic force so that the battery 28 attached to the battery attachment part 27 moves upward. When the hook provided on the battery 28 is released to remove the battery 28 from the battery mounting portion 27, the battery 28 is moved upward by the elastic force of the leaf spring 11H. This makes it easier for the user to remove the battery 28.

The inclination meter unit 12 includes an inclination meter 38 that measures the inclination angle of the loading platform 2 in the longitudinal direction with respect to the horizontal plane. In the embodiment, the inclination meter 38 is a so-called bubble tube (bubble level).

The operating device 13 is provided on the grip portion 3C. The operating device 13 is operated to start the motor 7. The operating device 13 is operated to adjust the rotational speed of the motor 7. The operating device 13 is operated to start the headlights 9 and the taillights 10.

Controller 14 controls at least motor 7 . The controller 14 controls the headlights 9 and taillights 10. Control of the headlights 9 and taillights 10 includes lighting control and light-off control. The controller 14 includes a circuit board 14A and a plurality of electronic components 14B mounted on the circuit board 14A. The circuit board 14C is housed in the controller case 14C. Examples of the electronic component 14B include a microcomputer 14B1, a ROM 14B2, a RAM 14B3, and a switching element 14B4. A MOSFET is exemplified as the switching element 14B4. The controller 14 is arranged on the loading platform 2. In the embodiment, the controller 14 is arranged in a storage section 29 provided in the loading platform 2. The accommodating portion 29 is provided so as to be recessed upward from the lower surface of the loading platform 2. With the controller 14 placed in the housing section 29, an opening provided at the bottom of the housing section 29 is covered by the controller cover 30. The controller cover 30 is fixed to the loading platform 2 with four screws 31. A vent hole 32 is provided in the controller cover 30. Air is supplied to the controller 14 through the vent 32 . The controller 14 is cooled by air supplied from the vent 32.

The battery 28 supplies power to the motor 7 via the controller 14. The battery mounting section 27 and the controller 14 are connected via a battery cable 33A, which is a power supply cable. The controller 14 and the motor 7 are connected via a motor cable 33B, which is a power supply cable. The current output from the battery 28 is supplied to the motor 7 via the battery cable 33A, the controller 14, and the motor cable 33B.

An internal space is provided between the front plate 4A and the rear plate 4B of the back plate 4. The handle 3 is pipe-shaped. A flexible tube 34 is arranged to connect the right column 3B and the loading platform 2. A rubber tube is exemplified as the flexible tube 34. One end of the flexible tube 34 is connected to the right column 3B via a connecting member 35. As shown in FIG. 6, the battery cable 33A is arranged in the internal space of the back plate 4, the right pillar section 3B, and the flexible tube 34. The flexible tube 34 allows the handle 3 to be changed between a used state and a folded state.

A cable accommodating member 36 is arranged to connect the loading platform 2 and the drive wheels 5. At least a portion of the motor cable 33B is arranged in the internal space of the cable housing member 36. As shown in FIGS. 11 and 12, at least a portion of the motor cable 33B is supported by the shaft 20.

The controller 14 and the headlight 9 are connected via a first light cable 33C, which is a power supply cable. At least a portion of the first light cable 33C is supported by the loading platform 2. As shown in FIG. 8, a pipe-shaped cable holder 70 is provided on the loading platform 2. The headlight 9 is arranged in a storage section 73 (see FIG. 5) provided in the loading platform 2. The accommodating portion 73 is provided so as to be recessed upward from the lower surface of the loading platform 2 . With the headlamp 9 disposed in the accommodating part 73, an opening provided at the lower part of the accommodating part 73 is closed by the headlamp cover 71. The headlight cover 71 is fixed to the loading platform 2 with two screws 72. The cable holder 70 is arranged to connect the accommodating section 29 in which the controller 14 is accommodated and the accommodating section 73 in which the headlamp 9 is accommodated. The first light cable 33C is arranged inside the cable holder 70. The current output from the battery 28 is supplied to the headlamp 9 via the battery cable 33A, the controller 14, and the first light cable 33C. The headlight 9 is turned on by power supplied from the battery 28.

The controller 14 and the taillight 10 are connected via a second light cable 33D, which is a power supply cable. At least a portion of the second light cable 33D is supported by the loading platform 2. As shown in FIG. 6, at least a portion of the second light cable 33D is arranged in the internal space of the left column 3A and the internal space of the back plate 4. The current output from the battery 28 is supplied to the taillight 10 via the battery cable 33A, the controller 14, and the second light cable 33D. The tail light 10 is turned on by power supplied from the battery 28.

The operating device 13 and the controller 14 are connected via a signal cable 33E. An operation signal generated by operating the operation device 13 is supplied to the controller 14 via the signal cable 33E. The signal cable 33E is arranged in the internal space of the grip section 3C, the right connecting section 3E, the right pillar section 3B, and the flexible tube 34.

[Battery case]
FIG. 14 is a perspective view from the rear showing the battery case 11 according to the embodiment. FIG. 15 is a sectional view showing the battery case 11 according to the embodiment. FIG. 16 is a diagram of the battery case 11 according to the embodiment viewed from above. FIG. 17 is a cross-sectional view showing a part of the battery case 11 according to the embodiment, and corresponds to a cross-sectional view taken along the line CC in FIG. 16. FIG. 18 is a sectional view showing a part of the battery case 11 according to the embodiment, and corresponds to a sectional view taken along the line DD in FIG. 16. FIG. 19 is an exploded perspective view showing the battery case 11 according to the embodiment.

The battery case 11 includes a case body 11A and a case cover 11B that opens and closes an opening provided at the top of the case body 11A. The rear part of the case body 11A and the rear part of the case cover 11B are connected via a hinge 11C. A torsion spring 11D is arranged on the hinge 11C. The torsion spring 11D generates elastic force so that the case cover 11B is closed. The torsion spring 11D prevents rainwater and dust from entering the inside of the battery case 11 due to forgetting to close the case cover 11B. A sealing member 11S is provided at the boundary between the front part of the case cover 11B and the upper part of the front part of the case body 11A. A seal member 11T is provided at the boundary between the rear part of the case cover 11B and the rear part of the case body 11A.

The battery case 11 includes a locking member 37 that locks the case body 11A and the case cover 11B when the case cover 11B is closed. The lock member 37 has a shaft portion 37A, a hook portion 37B, and a dial portion 37C. The shaft portion 37A is rotatably supported by the case cover 11B. The hook portion 37B is provided at the lower end of the shaft portion 37A. The dial portion 37C is arranged at the front portion of the upper surface of the case cover 11B. When the dial portion 37C is rotated in one direction with the opening of the case body 11A closed by the case cover 11B, the hook portion 37B enters the recess 11E provided inside the case body 11A, and the hook portion 37B enters the recess 11E provided inside the case body 11A. and the case cover 11B are locked. By rotating the dial portion 37C in the other direction, the hook portion 37B is removed from the recess 11E, and the lock between the case body 11A and the case cover 11B is released.

In the embodiment, the battery case 11 has a padlock hole 11G. By locking the padlock in the padlock hole 11G, the case cover 11B cannot be opened. This prevents the battery 28 from being stolen.

[Inclination meter unit]
The inclination meter unit 12 is arranged on the upper surface of the case cover 11B. The tilt meter unit 12 includes a tilt meter 38, a meter case 39, a coil spring 40, a screw 41, and a label 42.

The inclination meter 38 is a so-called bubble tube (bubble level). In the following description, the inclination meter 38 will be referred to as a bubble tube 38 as appropriate.

The bubble tube 38 is filled with liquid and bubbles 38A of a predetermined size. Alcohol or ether is exemplified as the liquid. The bubble tube 38 is arranged so that the longitudinal direction of the bubble tube 38 and the front-rear direction coincide with each other. That is, the bubble tube 38 is arranged so as to extend in the front-rear direction. The bubble tube 38 is long in the front-back direction. In embodiments, the bubble tube 38 is curved. The vial 38 is curved such that the center portion of the vial 38 is located above both ends of the vial 38 in the front-rear direction.

Meter case 39 accommodates bubble tube 38. The meter case 39 has an accommodation space 39A in which the vial 38 is accommodated, and an opening 39B in which the upper surface of the vial 38 is arranged. The bubble tube 38 is fixed to the meter case 39 with adhesive, for example. The bubble tube 38 is supported by the case cover 11B via the meter case 39. Meter case 39 is arranged in recess 11F provided on the upper surface of case cover 11B.

The coil spring 40 and the screw 41 function as an angle adjustment mechanism that adjusts the inclination angle of the meter case 39 in the front-back direction with respect to the case cover 11B.

Coil spring 40 is arranged between meter case 39 and case cover 11B. Two coil springs 40 are arranged in the front and rear direction. The coil spring 40 is arranged in a recess 39C provided on the lower surface of the meter case 39. The recessed portion 39C is formed to be depressed upward from the lower surface of the meter case 39. The upper end of the coil spring 40 contacts the meter case 39. The lower end of the coil spring 40 contacts the case cover 11B. The coil spring 40 is an elastic member that urges the meter case 39 upward with respect to the case cover 11B. The lower surface of the meter case 39 may be in contact with the case cover 11B or may be apart from the case cover 11B.

Screws 41 fix meter case 39 and case cover 11B. Two screws 41 are arranged to connect the front and rear parts of the meter case 39 to the case cover. By adjusting the tightening amount of each of the two screws 41, the inclination angle of the meter case 39 in the front-rear direction is adjusted. By adjusting the inclination angle of the meter case 39, the inclination angle of the bubble tube 38 in the front-rear direction is adjusted.

The tightening amount of the screw 41 is adjusted so that the air bubble 38A is placed in the longitudinal center of the bubble tube 38 with the electric assist trolley 1 placed on the floor parallel to the horizontal plane. That is, the air bubble 38A is arranged in the longitudinal center of the bubble tube 38 with the contact surfaces of the two drive wheels 5 and the two free wheels 6 in contact with the floor parallel to the horizontal plane. The amount by which the screw 41 is tightened is adjusted.

The label 42 displays the inclination angle of the electric assist trolley 1 with respect to the horizontal plane. The inclination angle of 0 degrees means that the electric assist trolley 1 is placed on a floor parallel to a horizontal plane. In the embodiment, the state in which the electrically assisted trolley 1 is placed on a floor surface parallel to a horizontal plane means that the upper surface of the loading platform 2 is in a state parallel to the horizontal surface. A positive value of the inclination angle means that the electric assist trolley 1 is inclined forward. A negative value of the inclination angle means that the electric assist trolley 1 is inclined backward. In the embodiment, a permissible value regarding the inclination angle of the electrically assisted trolley 1 is determined in advance. As an example, the permissible value regarding the inclination angle of the electric assist trolley 1 with respect to the horizontal plane is ±5 degrees. The inclination angle of +5 degrees means that the electric assist trolley 1 inclines forward by 5 degrees with respect to the horizontal plane. The inclination angle of -5 degrees means that the electrically assisted cart 1 is inclined 5 degrees rearward with respect to the horizontal plane. The label 42 includes a first indicator section 42A that indicates that the inclination angle of the electrically assisted trolley 1 is within the permissible value, and a second indicator section 42B that indicates that the inclination angle is not within the permissible value. The second indicator part 42B is arranged in front and behind the first indicator part 42A, respectively. The first indicator portion 42A is, for example, green. The second indicator portion 42B is, for example, yellow.

If the bubble tube 38 is straight, even if the electric assist trolley 1 is slightly tilted (for example, even if the inclination angle is 1 degree), the bubbles 38A will move to the end of the bubble tube 38, and the user will The bubbles 38A can no longer be visually recognized. That is, when the bubble tube 38 is straight, the sensitivity of the inclination meter 38 is too high, and it becomes difficult to display the inclination angle up to 5 degrees. In the embodiment, the bubble tube 38 has a curved shape that swells upward. Therefore, when the electric assist trolley 1 is slightly tilted (for example, when the tilt angle is 1 degree), the bubble 38A does not move to the end of the bubble tube 38. The bubble 38A remains within the first indicator portion 42A. Therefore, the user can visually recognize the bubbles 38A. Since the bubble tube 38 has a curved shape that bulges upward, it is possible to display a tolerance of ±5 degrees.

[Operation device]
FIG. 20 is a perspective view from the rear showing the operating device 13 according to the embodiment. FIG. 21 is a diagram of the operating device 13 according to the embodiment viewed from above. FIG. 22 is an exploded perspective view showing the operating device 13 according to the embodiment. FIG. 23 is a perspective sectional view showing the operating device 13 according to the embodiment.

The operating device 13 is attached to the grip portion 3C. The operating device 13 includes a case 43, a panel 44, a brake button 45, a speed change lever 46, and a circuit board 47.

Case 43 houses at least circuit board 47 . Case 43 includes an upper case 43A and a lower case 43B. A portion of the upper case 43A and a portion of the lower case 43B are arranged to sandwich the grip portion 3C from above and below.

The case 43 includes a connecting part 43C arranged around the grip part 3C, and a box part 43D arranged ahead of the connecting part 43C. The connecting portion 43C has a cylindrical shape. The connecting portion 43C is fixed to the grip portion 3C. The box portion 43D is arranged in front of the grip portion 3C. The box portion 43D accommodates at least the circuit board 47.

The panel 44 is arranged at the front part of the upper surface of the box part 43D. The panel 44 has a power button 48, a light button 49, and a display section 50. The power button 48 is arranged to the right of the light button 49. The display unit 50 is arranged between the power button 48 and the light button 49.

The brake button 45 is arranged at the rear of the top surface of the box portion 43D.

The gear shift lever 46 is rotatably supported by the box portion 43D.

The circuit board 47 includes a first switch 51 located directly below the power button 48 , a second switch 52 located directly below the light button 49 , and an LED chip 53 located directly below the display section 50 . . When the power button 48 is pressed, the first switch 51 is activated. When the light button 49 is pressed, the second switch 52 is activated. The display section 50 includes three transparent sections. When the LED chip 53 lights up, the light emitted from the LED chip 53 is emitted above the box section 43D via the display section 50. Four screw openings 47B are provided at the peripheral edge of the circuit board 47. Four screw bosses 43E are provided on the lower case 43B. A screw (not shown) inserted into the screw opening 47B is coupled to a screw hole provided in the screw boss 43E. The circuit board 47 is fixed to the lower case 43B with four screws (not shown).

When at least one of the power button 48, the light button 49, the brake button 45, and the gear shift lever 46 is operated, an operation signal is output from the output terminal 47A of the circuit board 47. The output terminal 47A is connected to the above-mentioned signal cable 33E. The operation signal output from the circuit board 47 is transmitted to the controller 14 via the signal cable 33E.

When the power button 48 is pressed while the controller 14 and motor 7 are stopped, the controller 14 and motor 7 are started. When the power button 48 is pressed while the controller 14 and motor 7 are activated, the controller 14 and motor 7 are stopped.

When the light button 49 is pressed while the headlights 9 and taillights 10 are off, the headlights 9 and taillights 10 are turned on. When the light button 49 is pressed while the headlights 9 and taillights 10 are on, the headlights 9 and taillights 10 are turned off.

The display unit 50 displays the remaining capacity of the battery. The display section 50 has three transmissive sections. An LED chip 53 is placed directly below each of the three transparent parts. As the remaining capacity of the battery 28 increases, the number of LED chips 53 that light up increases, and as the remaining capacity of the battery 28 decreases, the number of LED chips 53 that light up decreases.

The speed change lever 46 is operated to adjust the rotational speed of the motor 7. The gear shift lever 46 is supported by the case 43. The shift lever 46 includes a left operating section 46L that projects leftward from the left surface of the box section 43D, and a right operating section 46R that projects rightward from the right surface of the box section 43D. The left operating section 46L and the right operating section 46R are connected inside the box section 43D. The speed change lever 46 has a shaft portion 46S that connects a left operating portion 46L and a right operating portion 46R. The shaft portion 46S is rotatably supported by the box portion 43D. The left operating section 46L is arranged to protrude forward from the left side of the shaft section 46S. The right operating section 46R is arranged to protrude forward from the right side of the shaft section 46S.

When at least one of the front end of the left operating section 46L and the right operating section 46R is pushed downward from the initial position, the shaft section 46S rotates. The greater the amount of downward movement of the front end of the left operating section 46L and the front end of the right operating section 46R, the greater the amount of rotation of the shaft section 46S. A variable resistor 46T whose resistance value changes depending on the amount of rotation of the shaft portion 46S is arranged inside the box portion 43D. The circuit board 47 detects the amount of rotation of the shaft portion 46S based on the resistance value of the variable resistor 46T. In the embodiment, a gear 46G is disposed between the shaft portion 46S and the variable resistor 46T. The rotation of the shaft portion 46S is transmitted to the variable resistor 46T via the gear 46G. Gear 46G reduces rotation of shaft portion 46G. The circuit board 47 outputs an operation signal for adjusting the rotational speed of the motor 7 based on the amount of rotation of the shaft portion 46S transmitted via the gear 46G. The circuit board 47 outputs an operation signal such that the rotational speed of the motor 7 increases as the amount of rotation of the shaft portion 46S from the initial position of the speed change lever 46 increases. That is, the larger the amount of downward movement of the front end of the left operating section 46L and the front end of the right operating section 46R, the more the circuit board 47 outputs the operating signal so that the electric assist trolley 1 moves at a higher speed. The rotational speed of the motor 7, that is, the moving speed of the electric assist trolley 1 changes based on the amount of operation of the speed change lever 46. The smaller the amount of downward movement of the front end of the left operating section 46L and the front end of the right operating section 46R, the lower the rotational speed of the motor 7. The smaller the amount of downward movement, the greater the rotational speed of the motor 7.

In the embodiment, the left operating section 46L, the right operating section 46R, and the shaft section 46S are integral (single member). The left operating section 46L and the right operating section 46R rotate together. When the left operating section 46L is pressed, the right operating section 46R rotates together with the left operating section 46L. When the right operating section 46R is pressed, the left operating section 46L rotates together with the right operating section 46R.

In the embodiment, a torsion spring 54 is attached to the shaft portion 46S. The torsion spring 54 generates an elastic force so that the front end of the left operating section 46L and the front end of the right operating section 46R move upward. When the operation of the shift lever 46 is released, the elastic force of the torsion spring 54 causes the shift lever 46 to return to its initial position.

The brake button 45 is operated to reduce the traveling speed of the electrically assisted trolley 1. When the brake button 45 is pressed, the motor 7 is operated to provide resistance to the rotation of the drive wheels 5. That is, the brake button 45 is operated to apply resistance to the rotation of the drive wheels 5, and when the brake button 45 is pressed, the motor 7 functions as an electric brake. The electric brake by the motor 7 operates only while the brake button 45 is pressed. For example, when the electric assist trolley 1 is traveling downhill with a heavy load loaded on the loading platform 2, the brake button 45 is pressed, and the electric brake is applied only for the period that the brake button 45 is pressed. A person can go downhill while pulling the electric assist trolley 1 with light force.

As shown in FIG. 23, a third switch 58 is arranged on the lower surface of the circuit board 47. Further, a cam member 59 and a coil spring 74 are arranged inside the case 43. The coil spring 74 is arranged around the convex portion 43F that protrudes downward from the ceiling surface of the upper case 43A. The cam member 59 has a first contact portion 59A located directly below the brake button 45, a second contact portion 59B located directly below the third switch 58, and a second contact portion 59B located directly below the coil spring 74. 3 contact portions 53C, and a rotation shaft portion 59D rotatably supported by at least a portion of the case 43. The first contact portion 59A is arranged at the rear of the rotating shaft portion 59D. Each of the second contact portion 59B and the third contact portion 59C is arranged forward of the rotation shaft portion 59D. The lower end portion of the coil spring 74 contacts the upper surface of the third contact portion 59C. The coil spring 74 generates elastic force so that the third contact portion 59C moves downward. When the brake button 45 is pressed, the first contact portion 59A moves downward. When the first contact portion 59A moves downward, the rotation shaft portion 59D rotates, and each of the second contact portion 59B and the third contact portion 59C moves upward. As the second contact portion 59B moves upward, the third switch 58 is pushed upward by the second contact portion 59B, and the third switch 58 is activated. When the third switch 58 is activated, an operation signal is output from the output terminal 47A of the circuit board 47 so that the motor 7 functions as an electric brake. When the brake button 45 is released, the third contact portion 59C moves downward due to the elastic force of the coil spring 74. When the third contact portion 59C moves downward, the rotation shaft portion 59D rotates, the second contact portion 59B moves downward, and the first contact portion 59A moves upward. By moving the second contact portion 59B downward, the operation of the third switch 58 is released, and the output of the operation signal that causes the motor 7 to function as an electric brake is stopped. By moving the first contact portion 59A upward, the brake button 45 is returned to the initial position.

[Specifications]
As mentioned above, the drive wheel 5 rotated by the motor 7 is the rear wheel. The free wheel 6 is a front wheel. That is, the electrically assisted trolley 1 is of a rear wheel drive forward steering type. The electric assist trolley 1 has the same operability as a handcart.

The electrically assisted trolley 1 can perform assisted travel in which the rotational force of the motor 7 is generated, and non-assisted travel in which the rotational force of the motor 7 is not generated. That is, the user can use the electrically assisted cart 1 as a hand cart. Note that the motor 7 assists the user when the electric assist truck 1 moves forward, and does not assist the user when the electric assist truck 1 moves backward.

In the embodiment, the rated voltage of the battery 28 is 18 [V].

The distance over which the motor 7 can assist travel is 10 [km].

The maximum load capacity of the electrically assisted trolley 1 during assisted travel is 60 [kg]. Note that the maximum load capacity of the electrically assisted trolley 1 during non-assisted running when the motor 7 is not driven is 150 [kg].

The maximum slope climbing ability of the electrically assisted trolley 1 is 5 [°].

The controller 14 can adjust the traveling speed of the electrically assisted trolley 1 within a range of 0 [km/h] or more and 5 [km/h] or less.

The longitudinal dimension of the loading platform 2 is 750 [mm], and the horizontal dimension of the loading platform 2 is 480 [mm]. The longitudinal dimension of the electrically assisted cart 1 in the used state is 842 [mm], and the longitudinal dimension of the electrically assisted cart 1 in the used state is 480 [mm]. The vertical dimension is 925 [mm].

The mass of the electric assist trolley 1 with the battery 28 attached is 16.4 [kg].

All numerical values of the above-mentioned specifications can be changed within a range of ±10%. Moreover, all the numerical values of the above-mentioned specifications can also be changed within the range of ±20%. Moreover, the numerical values of the above-mentioned specifications can be changed to arbitrary values.

[Folded state]
FIG. 24 is a perspective view showing the coupling mechanism 18 according to the embodiment. FIG. 24 shows a connecting mechanism 18 that connects the left column portion 3A and the loading platform 2. As shown in FIG. The connection mechanism 18 rotatably supports the lower end of the left column 3A with respect to the loading platform 2. As mentioned above, the handle 3 rotates to change between the used state and the folded state. In use, the left column portion 3A and the right column portion 3B are each arranged so as to extend upward from the loading platform 2. The folded state is a state in which the grip portion 3C is rotated so as to approach the top surface of the loading platform 2. The coupling mechanism 18 includes a left plate portion 18A disposed on the left side of the left column portion 3A, a right plate portion 18B disposed on the right side of the left column portion 3A, and a lower end portion of the left plate portion 18A and a right plate portion 18B. It has a lower plate part 18C connecting the lower end part, and a rotation shaft 18D supported by each of the left plate part 18A and the right plate part 18B. The lower plate portion 18C is fixed to the loading platform 2. The coupling mechanism 18 locks the handle 3 so that it cannot rotate when the handle 3 is in use. The coupling mechanism 18 has a folding bar 19. When the folding bar 19 is moved downward by the user, the lock of the handle 3 is released, and the handle 3 can be rotated to change from the usage state to the folded state.

A convex portion 18E is provided on the right surface of the left plate portion 18A. The convex portion 18E protrudes rightward from the right surface of the left plate portion 18A. When the handle 3 is rotated to change from the used state to the folded state, the lower end of the left column 3A comes into contact with the protrusion 18E. When the handle 3 is rotated to change from the used state to the folded state, the lower end of the left pillar part 3A receives resistance from the convex part 18E, so that the handle 3 is prevented from falling down violently. Further, the convex portion 18E prevents the handle 3 in the folded state from rising unnecessarily.

FIG. 25 is a perspective view from the front showing the electrically assisted trolley 1 in a folded state according to the embodiment. FIG. 26 is a perspective view from the rear showing the electrically assisted trolley 1 in a folded state according to the embodiment. FIG. 27 is a diagram of the electrically assisted trolley 1 in a folded state according to the embodiment viewed from the right side.

In use, the box portion 43D and the speed change lever 46 are arranged in front of the grip portion 3C. Therefore, in the folded state, the box portion 43D and the gear shift lever 46 are arranged below the grip portion 3C. In the folded state, since the box portion 43D and the gear shift lever 46 are not arranged above the grip portion 3C, contact between the box portion 43D and the gear shift lever 46 and objects around the electric assist trolley 1 is suppressed. Moreover, in the use state, the grip part 3C is arranged at the rear of the left column part 3A and the right column part 3B. Therefore, in the folded state, even if the left column part 3A and the right column part 3B come into contact with the loading platform 2, the contact between the box part 43D and the speed change lever 46 and the loading platform 2 is suppressed.

FIG. 28 is a diagram showing a state in which the electrically assisted trolley 1 in the folded state according to the embodiment is standing on the floor surface FL. In the embodiment, the loading platform 2 is provided with legs 55 . As shown in FIGS. 1 and 2, in use, the legs 55 protrude downward from the rear portion of the lower surface of the loading platform 2. As shown in FIGS. In use, the leg portion 55 is disposed further rearward than the drive wheel 5. As shown in FIG. 28, the user can stand the electrically assisted trolley 1 on the floor FL so that the legs 55 are in contact with the floor FL. Thereby, the electric assist cart 1 is stored in a state where an increase in the area occupied by the electric assist cart 1 is suppressed. As mentioned above, the motor 7 is arranged inside the drive wheel 5. Therefore, the weight of the drive wheels 5 is large. If there is no leg portion 55 and the electric assist cart 1 is stood on the floor FL, there is a possibility that the electric assist cart 1 will fall down due to the weight of the drive wheels 5. In the embodiment, since the leg portions 55 are provided, the electrically assisted trolley 1 is prevented from falling over.

[table]
FIG. 29 is a perspective view from the front showing the electrically assisted trolley 1 on which the table 60 according to the embodiment is mounted. FIG. 30 is a perspective view from the front showing the table 60 and the electric assist trolley 1 according to the embodiment. FIG. 31 is a diagram of the electrically assisted cart 1 on which the table 60 according to the embodiment is mounted, viewed from below.

The table 60 has four legs 61 and two shelves 62. The leg portion 61 is inserted into the recess 16 of the loading platform 2. As shown in FIG. 31, the legs 61 inserted into the recesses 16 are fixed to the loading platform 2 with screws 56. The screw 56 is inserted into the inside of the recess 16 from the lower side of the loading platform 2 and into a screw hole provided at the lower end of the leg 61.

[effect]
In the embodiment, the electric assist trolley 1 includes at least three wheels including a drive wheel 5, a loading platform 2 supported by the wheels, a handle 3 having a grip portion 3C extending in the left-right direction above the rear of the loading platform 2, It may also include a motor 7 that rotates the drive wheel 5 and an inclination meter 38 that measures the inclination angle of the loading platform 2 in the front-rear direction with respect to a horizontal plane.

In the above configuration, the inclination meter 38 allows the user to recognize the inclination angle of the electric assist trolley 1.

In the embodiment, the inclination meter 38 may be arranged above the loading platform 2.

In the above configuration, since the inclination meter 38 is arranged at a high position, the user can easily recognize the inclination meter 38 visually.

In the embodiment, the inclination meter 38 may be arranged between the left column section 3A and the right column section 3B.

In the above configuration, since the inclination meter 38 is disposed at the center of the electric assist trolley 1 in the left-right direction, the user can easily visually recognize the inclination meter 38.

In the embodiment, the electric assist trolley 1 is disposed between a battery mounting part 27 to which a battery 28 that supplies power to the motor 7 is mounted, and a left pillar part 3A and a right pillar part 3B, and accommodates the battery mounting part 27. The battery case 11 may also be provided. The inclination meter 38 may be provided in the battery case 11.

With the above configuration, it becomes easier for the user to visually recognize the inclination meter 38.

In the embodiment, the electric assist trolley 1 may include a back plate 4 disposed between the left column portion 3A and the right column portion 3B. The battery case 11 may be fixed to the rear surface of the back plate 4.

In the above configuration, since the inclination meter 38 is disposed at the rear of the back plate 4, the user can easily recognize the inclination meter 38 visually.

In the embodiment, the battery case 11 may include a case body 11A fixed to the rear surface of the back plate 4, and a case cover 11B that opens and closes an opening provided at the top of the case body 11A. The inclination meter 38 may be supported by the case cover 11B.

With the above configuration, it becomes easier for the user to visually recognize the inclination meter 38.

In the embodiment, the electric assist trolley 1 may include a meter case 39 to which the inclination meter 38 is fixed. The inclination meter 38 may be supported by the case cover 11B via the meter case 39.

In the above configuration, the inclination meter 38 is supported by the case cover 11B via the meter case 39.

In the embodiment, the meter case 39 may have an accommodation space 39A in which the inclination meter 38 is accommodated, and an opening 39B in which the upper surface of the inclination meter 38 is arranged.

In the above configuration, the inclination meter 38 is protected by the meter case 39 because the inclination meter 38 is disposed in the accommodation space 39A. The user can visually recognize the inclination meter 38 through the opening 39B of the meter case 39.

In embodiments, the tilt meter 38 may be a bubble tube 38. The bubble tube 38 may be long in the front-rear direction.

In the above configuration, the inclination meter 38 is constructed at low cost.

In embodiments, the vial 38 may be curved such that a central portion of the vial 38 is located above both ends of the vial 38.

With the above configuration, even if the allowable value of the inclination angle is large, the bubble tube 38 can appropriately indicate the inclination angle. For example, if the bubble tube 38 is straight, even if the electric assist trolley 1 is slightly tilted (for example, even if the inclination angle is 1 degree), the bubbles 38A will move to the end of the bubble tube 38, causing the user to , the bubble 38A becomes invisible. That is, when the bubble tube 38 is straight, the sensitivity of the inclination meter 38 is too high, making it difficult to display the inclination angle up to, for example, 5 degrees. When the bubble tube 38 has a curved shape that bulges upward, if the electric assist trolley 1 is slightly tilted (for example, when the inclination angle is 1 degree), the bubble 38 will move to the end of the bubble tube 38. do not. Therefore, the user can visually recognize the bubbles 38a. Since the bubble tube 38 has a curved shape that bulges upward, it is possible to display a tolerance of, for example, ±5 degrees.

In the embodiment, the electric assist trolley 1 may include an angle adjustment mechanism that adjusts the inclination angle of the meter case 39 in the front-rear direction with respect to the case cover 11B.

With the above configuration, the tilt meter 38 can be calibrated.

In the embodiment, the angle adjustment mechanism may include a coil spring 40 that is an elastic member disposed between the meter case 39 and the case cover 11B, and a screw 41 that fixes the meter case 39 and the case cover 11B. good. The coil spring 40 may bias the meter case 39 upward with respect to the case cover 11B. The inclination angle of the meter case 39 may be adjusted by adjusting the tightening amount of the screw 41.

With the above configuration, the tilt meter 38 can be calibrated.

In the embodiment, the coil spring 40 may be placed in a recess 39C provided on the lower surface of the meter case 39.

In the above configuration, the meter case 39 is appropriately urged upward.

In the embodiment, two screws 41 may be arranged to connect each of the front and rear parts of the meter case 39 and the case cover 11B. The inclination angle of the meter case 39 may be adjusted by adjusting the tightening amount of each of the two screws 41 arranged in the front-rear direction.

With the above configuration, the tilt meter 38 can be calibrated.

In the embodiment, two coil springs 40 may be arranged in the front-rear direction.

In the above configuration, the meter case 39 is appropriately urged upward.

[Modified example]
FIG. 32 is a sectional view showing a first modification of the angle adjustment mechanism according to the embodiment. FIG. 32 corresponds to a cross-sectional view taken along the line CC of the battery case 11 shown in FIG. 17. In the embodiment described above, the meter case 39 is urged upward by the coil spring 40. In the example shown in FIG. 32, the elastic member 401 is an elastic body such as rubber placed around the screw 411. The elastic member 401 disposed around the screw 411 may urge the meter case 391 upward with respect to the case cover 111B. Two screws 411 are arranged to connect each of the front and rear parts of the meter case 391 and the case cover 111B. Two elastic members 401 are arranged in the front-rear direction. By adjusting the tightening amount of each of the two screws 411, the inclination angle of the meter case 391 is adjusted.

FIG. 33 is a sectional view showing a second modification of the angle adjustment mechanism according to the embodiment. FIG. 33 corresponds to a cross-sectional view taken along the line CC of the battery case 11 shown in FIG. 17. In the example shown in FIG. 33, elastic member 402 is a leaf spring disposed between the lower surface of meter case 392 and case cover 112B. The elastic member 402 may urge the meter case 392 upward with respect to the case cover 112B. Two screws 412 are arranged to connect the front and rear parts of the meter case 392 to the case cover 112B. By adjusting the tightening amount of each of the two screws 412, the inclination angle of the meter case 392 is adjusted.

FIG. 34 is a sectional view showing a third modification of the angle adjustment mechanism according to the embodiment. FIG. 34 corresponds to a cross-sectional view taken along the line CC of the battery case 11 shown in FIG. 17. In the embodiment described above, the meter case 39 and the case cover 11B are fixed to each other by the screws 41 inserted into the screw openings of the meter case 39 from above. As shown in FIG. 34, meter case 393 and case cover 113B may be fixed by screws 413 inserted from below case cover 113B. In the example shown in FIG. 34, the meter case 393 is urged upward by a coil spring 403 disposed in a recess 393C provided on the lower surface of the meter case 393. Two coil springs 403 are arranged in the front and rear direction.

FIG. 35 is a sectional view showing a fourth modification of the angle adjustment mechanism according to the embodiment. FIG. 35 corresponds to a cross-sectional view taken along the line CC of the battery case 11 shown in FIG. 17. As shown in FIG. 35, a hook portion 394A is provided at the rear of the meter case 394. The hook portion 394A is hung on at least a portion of the case cover 114B. One screw 414 is arranged to connect the front part of meter case 394 and case cover 114B. The meter case 394 is urged upward by a coil spring 404 disposed in a recess 394C provided on the lower surface of the meter case 394. One coil spring 404 is arranged in the front-rear direction. By adjusting the tightening amount of one screw 411, the inclination angle of meter case 394 is adjusted.

Each of FIGS. 36 and 37 is a sectional view showing a fifth modification of the angle adjustment mechanism according to the embodiment. FIG. 36 corresponds to a cross-sectional view taken along the line CC of the battery case 11 shown in FIG. 17. FIG. 37 corresponds to a cross-sectional view taken along line EE in FIG. 36. Meter case 395 is arranged in recess 115F provided in case cover 115B. The bubble tube 38 is arranged in the accommodation space 395A of the meter case 395. In the example shown in FIGS. 36 and 37, the rear part of the meter case 395 is rotatably connected to the case cover 115B by a pin 57. The rotation axis of the pin 57 extends in the left-right direction. One screw 415 is arranged to connect the front part of meter case 395 and case cover 115B. The meter case 395 is urged upward by a coil spring 405 disposed in a recess 395C provided on the lower surface of the meter case 395. One coil spring 405 is arranged in the front-rear direction. One coil spring 405 is arranged in the front-rear direction. In the front-back direction, the distance between the coil spring 405 and the screw 415 is shorter than the distance between the coil spring 405 and the pin 57. By adjusting the tightening amount of one screw 415, the inclination angle of meter case 395 is adjusted.

1... Electrically assisted trolley, 2... Loading platform, 3... Handle, 3A... Left column, 3B... Right column, 3C... Grip, 3D... Left connecting part, 3E... Right connecting part, 4... Back plate, 4A... Front plate, 4B...Rear plate, 4L...Left-hand thread, 4M...Medium thread, 4R...Right-hand thread, 5...Drive wheel, 6...Swivel wheel, 7...Motor, 8...Parking brake pedal, 8P...Parking brake pin, 9 …Headlight, 10…Tail light, 11…Battery case, 11A…Case body, 11B…Case cover, 11C…Hinge, 11D…Torsion spring, 11E…Recess, 11F…Recess, 11G…Padlock hole, 11H…Leaf spring , 11J...Screw, 11S...Sealing member, 11T...Sealing member, 12...Inclination meter unit, 13...Operation device, 14...Controller, 14A...Circuit board, 14B...Electronic component, 14B1...Microcomputer, 14B2...ROM, 14B3 ...RAM, 14B4...Switching element, 14C...Controller case, 15...Rubber pad, 16...Recess, 17...Handle opening, 18...Connection mechanism, 18A...Left plate section, 18B...Right plate section, 18C...Lower plate section, 18D ...Rotating shaft, 18E...Protrusion, 19...Folding bar, 20...Shaft, 21...Stator, 21T...Teeth, 22...Rotor, 23...Housing, 23L...Left housing, 23R...Right housing, 24...Bracket, 25 ...Screw, 26...Bearing, 27...Battery attachment part, 28...Battery, 29...Accommodating part, 30...Controller cover, 31...Screw, 32...Vent, 33A...Battery cable, 33B...Motor cable, 33C...First Light cable, 33D...Second light cable, 33E...Signal cable, 34...Flexible tube, 35...Connection member, 36...Cable accommodation member, 37...Lock member, 37A...Shaft part, 37B...Hook part, 37C...Dial part , 38... Inclination meter (vibble tube), 38A... Air bubble, 39... Meter case, 39A... Accommodation space, 39B... Opening, 39C... Recess, 40... Coil spring, 41... Screw, 42... Label, 42A... First indicator part, 42B...second indicator part, 43...case, 43A...upper case, 43B...lower case, 43C...coupling part, 43D...box part, 43E...screw boss, 43F...convex part, 44...panel, 45...brake Button, 46...Shift lever, 46G...Gear, 46L...Left operation section, 46R...Right operation section, 46S...Shaft section, 46T...Variable resistor, 47...Circuit board, 47A...Output terminal, 47B...Screw opening, 48... Power button, 49... Light button, 50... Display section, 51... First switch, 52... Second switch, 53... LED chip, 54... Torsion spring, 55... Leg, 56... Screw, 57... Pin, 58... Third switch, 59... Cam member, 59A... First contact part, 59B... Second contact part, 59C... Third contact part, 59D... Rotating shaft part, 60... Table, 61... Leg part , 62...shelf section, 70...cable holder, 71...headlight cover, 72...screw, 73...accommodating section, 74...coil spring, 80...bell, 111B...case cover, 112B...case cover, 113B...case cover , 114B...Case cover, 115B...Case cover, 115F...Recess, 391...Meter case, 392...Meter case, 393...Meter case, 393C...Recess, 394...Meter case, 394A...Hook part, 394C...Recess, 395... Meter case, 395A...accommodation space, 395C...recess, 401...elastic member, 402...elastic member, 403...coil spring, 404...coil spring, 405...coil spring, 411...screw, 412...screw, 413...screw, 414 ...screw, 415...screw, FL...floor surface.

Claims (20)

at least three wheels including a drive wheel;
a loading platform supported by the wheels;
a handle having a grip portion extending in the left-right direction above the rear portion of the loading platform;
a motor that rotates the drive wheel;
an inclination meter that measures the inclination angle of the loading platform in the front-rear direction with respect to a horizontal plane;
Electrically assisted trolley. the inclination meter is located above the loading platform;
The electrically assisted trolley according to claim 1. The inclination meter is disposed between the left pillar part and the right pillar part,
The electric assist trolley according to claim 1 or 2. a battery mounting part to which a battery for supplying power to the motor is mounted;
a battery case disposed between the left column part and the right column part and accommodating the battery mounting part;
the inclination meter is provided in the battery case,
The electric assist trolley according to claim 3. comprising a back plate disposed between the left pillar part and the right pillar part,
the battery case is fixed to a rear surface of the back plate;
The electric assist trolley according to claim 4. The battery case has a case body fixed to the rear surface of the back plate, and a case cover that opens and closes an opening provided at the top of the case body,
the inclination meter is supported by the case cover;
The electric assist trolley according to claim 5. comprising a meter case to which the inclination meter is fixed;
The inclination meter is supported by the case cover via the meter case.
The electric assist trolley according to claim 6. The meter case has an accommodation space in which the inclination meter is accommodated, and an opening in which an upper surface of the inclination meter is arranged.
The electric assist trolley according to claim 7. the inclination meter is a vial;
The bubble tube is long in the front-back direction.
The electric assist trolley according to claim 7 or 8. The level tube is curved such that the center portion of the level tube is located above both ends of the level tube.
The electric assist trolley according to claim 9. comprising an angle adjustment mechanism that adjusts the inclination angle of the meter case in the front-rear direction with respect to the case cover;
The electrically assisted trolley according to any one of claims 7 to 10. The angle adjustment mechanism includes an elastic member disposed between the meter case and the case cover, and a screw that fixes the meter case and the case cover,
the elastic member urges the meter case upward against the case cover;
By adjusting the tightening amount of the screw, the inclination angle of the meter case is adjusted.
The electric assist trolley according to claim 11. The elastic member includes a coil spring disposed in a recess provided on the lower surface of the meter case.
The electric assist trolley according to claim 12. The elastic member includes an elastic body disposed around the screw.
The electric assist trolley according to claim 12. The elastic member includes a leaf spring disposed between the lower surface of the meter case and the case cover.
The electric assist trolley according to claim 12. The screws are arranged in two so as to connect each of the front and rear parts of the meter case and the case cover,
The inclination angle of the meter case is adjusted by adjusting the tightening amount of each of the two screws.
The electric assist trolley according to any one of claims 12 to 15. A hook portion that is hung on at least a portion of the case cover is provided at the rear of the meter case,
One screw is arranged to connect the front part of the meter case and the case cover,
The inclination angle of the meter case is adjusted by adjusting the tightening amount of each of the one screw.
The electric assist trolley according to any one of claims 12 to 15. Two elastic members are arranged in the front and back direction,
The electric assist trolley according to claim 16. A rear part of the meter case is rotatably connected to the case cover by a pin,
One screw is arranged to connect the front part of the meter case and the case cover,
The inclination angle of the meter case is adjusted by adjusting the tightening amount of each of the one screw.
The electric assist trolley according to any one of claims 12 to 15. One elastic member is arranged in the front-rear direction,
In the front-back direction, the distance between the elastic member and the screw is shorter than the distance between the elastic member and the pin.
The electric assist trolley according to claim 19.

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