JP2021052571A - Motor central shaft, actuator using the same, wheel, and wheelchair - Google Patents

Abstract

To provide a motor central shaft that facilitates attachment of a battery to the motor central shaft and also enables attachment of the battery to a wheel, thereby improving space utilization of the wheel.SOLUTION: A motor central shaft 220 includes a hollow stage, a first end and a second end, and a mounting portion between the first end and the second end that is used to fix a motor stator. A first connection structure is provided at the first end, and the first connection structure connects to a connector so that a battery 230 is fixed and connected by a connector 240.SELECTED DRAWING: Figure 6

Description

The present invention relates to a motor central shaft, and actuators, wheels and wheelchairs using the same.

The electric wheel is generally rotationally driven by a motor, and further enables the device to which the wheel is attached to travel. The motor needs to be powered by a battery, but in the prior art, all the batteries are attached to the device body, and the conventional wheels cannot be attached to the batteries.

Therefore, there is a demand for a motor central shaft that facilitates mounting of the battery on the motor central shaft, further realizes mounting of the battery on the wheel, and can improve the space utilization rate of the wheel.

The present invention is a motor having a hollow step, having a first end and a second end, and having a mounting portion used for fixing the stator of the motor between the first end and the second end. A central shaft, the first end of which is provided with a first connection structure, the first connection structure for connecting to the connector so as to fix and connect the battery by a connector. I will provide a.

Further, the wall of the central shaft of the motor is provided with a first through hole and a second through hole that communicate with the hollow stage, and the first through hole is located at the first end of the battery. An electric wire electrically conductive with and can enter the hollow stage through the first through hole, and the electric wire located in the hollow stage can extend through the second through hole. preferable.

Further, the second through hole is located at the position of the mounting portion, and a feeding line electrically conductive with the battery enters the hollow stage through the first through hole, and further supplies electric power to the motor. Can be supplied.
It is preferable that the hollow step extends to the second end and the second through hole is close to the second end.

Further, it is preferable that the connector has positive and negative electrodes in contact with the conductive electrode of the battery and a second engagement structure corresponding to the first engagement structure of the battery.

In the present invention, it has a hollow step, has a first end and a second end, and has a mounting portion used for fixing the motor stator between the first end and the second end. A motor central shaft provided with a second connection structure at the second end, a first connection structure is provided at the first end, a connector is connected to the first connection structure, and the connector is: Further provided is a motor central shaft that connects to a battery.

In the present invention, the actuator further includes the motor central shaft, the mounting portion is fixed to the stator of the motor, and the rotor of the motor is placed on the motor central shaft to cover the transmission. Further provided is an actuator that is transmitted so that the case of the transmission is configured to rotate with respect to the central axis of the motor.

Further, the outer peripheral edge of the case of the transmission extends toward the stator side to form a ring-shaped arm, a connecting portion is formed on the outer surface of the ring-shaped arm, and the ring-shaped arm holds the stator. It has a ring-shaped groove that surrounds it, and the ring-shaped groove provides an actuator that accommodates the ring-shaped portion of the battery.

Further, in the present invention, the wheel includes the rim and the inner hub.
The inner hub includes the actuator and provides a wheel with a case of the transmission connected to the rim.
Further, a wheelchair including the above wheels will be provided.

According to the present invention, a desired battery can be attached to the first end of the central shaft and fixed to the wheel together with the motor central shaft, so that the space utilization rate of the wheel can be improved.

FIG. 1 is a schematic structural diagram of a wheel of an embodiment. FIG. 2 is an enlarged view of I1 of FIG. FIG. 3 is a front view of the wheel of the embodiment. FIG. 4 is a schematic view of stress of the wheel of the first embodiment. FIG. 5 is a schematic view of stress of the wheel of the second embodiment. FIG. 6 is a schematic structural diagram of an actuator with a battery. FIG. 7 is a cross-sectional view of the actuator after removing the battery. FIG. 8 is a schematic structural diagram of the motor central shaft of the embodiment. FIG. 9 is a schematic structural diagram of the battery of the embodiment. FIG. 10 is a schematic view of the inside of the battery after removing the housing.

Hereinafter, the technical solutions in the examples of the present invention will be clearly and completely described with reference to the drawings in the examples of the present invention, and of course, the described examples will be a part of the examples of the present invention. Not all examples.

The present embodiment provides wheels, which can be attached to any device in which the wheel can be used, such as an electric vehicle, electric bicycle, electric wheelchair, etc., without limitation, and the device is by the wheel. Wheel running can be realized.

As shown in FIGS. 1 and 2, the wheel includes the rim 100 and the inner hub 110, and when stationary, the rim 100 is connected to the inner hub 110 and the centers of both are substantially aligned, and the inner hub 110 is located at the center. Can be located. A tire 120 or the like can be attached to the outside of the rim 100. The wheel has a first side C1 and a second side C2 with respect to the surface on which the wheel is located.

Specifically, a deformable ring-shaped sheet 130 is attached between the rim 100 and the inner hub 110, so that the ring-shaped sheet 130 can be compressed or recovered. The center of the ring-shaped sheet 130 substantially coincides with the center of the rim 100 or the inner hub 110. The ring-shaped sheet 130 can be made of a metal such as steel. The thickness of the ring-shaped sheet 130 (that is, the thickness along the radial direction) is smaller than the length of the ring-shaped sheet 130 (that is, the length along the axial direction), and the thickness of the ring-shaped sheet 130 is It can be set according to actual use. The thicker the ring-shaped sheet 130, the weaker the deformability and the stronger the rigidity, and the thinner the ring-shaped sheet 130, the better the deformability.

Several mounting sheets 131 may be fixed to the ring-shaped sheet 130 in order to facilitate subsequent mounting, and thus the first bearing 132 and the second bearing 133 are mounted by the mounting sheet 131.

The rim 100 is provided with several first mounting positions 101, and the third bearing 102 can be fixed to the first mounting position 101. The inner hub 110 is provided with several second mounting positions 111, and the fourth bearing 112 can also be fixed to the second mounting position 111. Among them, the number of the first bearing 132 is equal to the number of the third bearing 102, and the number of the second bearing 133 is equal to the number of the fourth bearing 112. The first connecting arm 140 is connected between the ring-shaped seat 130 and the rim 100, and the second connecting arm 150 is connected between the ring-shaped seat 130 and the inner hub 110. The first connecting arm 140 and the second connecting arm 150 may be made of strip steel. One first bearing 132 and one third bearing 102 are connected to both ends of the first connecting arm 140, respectively, and one second bearing 133 and one fourth bearing are connected to both ends of the second connecting arm 150, respectively. The bearing 112 is connected so that the first connecting arm 140 and the second connecting arm 150 are both distributed in a ring shape around the center, and both ends of the first connecting arm 140 and the second connecting arm 150. Are all relatively rotatable.

The third bearing 102 is a first connection point where the first connection arm 140 and the rim 100 are connected. The first bearing 132 is a second connection point where the first connection arm 140 and the ring-shaped sheet 130 are connected. The second bearing 133 is a third connection point where the second connection arm 150 and the ring-shaped sheet 130 are connected. The fourth bearing 112 is a fourth connection point where the second connection arm 150 and the inner hub 110 are connected.

If the swaying road surface or running speed changes during the running process of the device, the speed of the rim 100 and the inner hub 110 is large because the rim 100 and the inner hub 110 are not completely rigidly connected due to inertial action. Or, the speed directions do not match, and the first connection arm 140 and the second connection arm 150 are rotatable. Therefore, when the center of the rim 100 and the center of the inner hub 110 deviate from each other, or the inner hub 110 is the rim 100. The ring-shaped sheet 130 is pulled by the first connecting arm 140 and the second connecting arm 150, causing deformation of the ring-shaped sheet 130, and after the deformation reaches a certain level, the ring-shaped sheet 130 is deformed. The seat 130 tends to return to its original state by the action of its own elastic force, further restores the inner hub 110 to a balanced position, for example holding the center again in line with the center of the rim 100, and further the wheels. Has a buffering effect, making the device more gentle as it travels.

In this embodiment, as shown in FIG. 3, the bind line L1 between the first connection point and the second connection point does not overlap with the diameter line past the first connection point of the rim 100, that is, the first The entire 1-connecting arm 140 has an angle with respect to the corresponding diameter line, which can be tilted from the outer radial direction to the first rotation direction around the center. The bind line L2 between the third connection point and the fourth connection point does not overlap with the diameter line past the third connection point of the inner hub 110, that is, the entire second connection arm 150 is the corresponding diameter line. There is a deflection angle with respect to, which can be tilted from the outer radial direction to the first rotation direction S1 around the center, or can be tilted in the second rotation direction opposite to the first rotation direction. .. Then, when the swaying road surface or the traveling speed changes, the first connecting arm 140 or the second connecting arm 150 becomes easier to rotate due to the inertial action (that is, the rim 100 becomes more rigid with respect to the inner hub 110). (Weak), the ring-shaped sheet 130 is more compressed and easily deformed, and the inner hub 110 is better easily buffered by the ring-shaped sheet 130.

As shown in FIG. 4, if the inclination direction of the entire first connection arm 140 is the same as the inclination direction of the entire second connection arm 150, the center of the inner hub 110 is directed toward the M1 direction due to the action of inertia. It deviates from the center of the rim 100. As a result, the inner hub 110 acts on the second connecting arm 150 to rotate the second connecting arm 150 around the third connecting point in the deviation direction M2, and the first connecting arm 140 and the second connecting arm 150 Since the first connecting arm 140 rotates in the M3 direction, the ring-shaped sheet 130 is deformed and at the same time rotated with respect to the rim 100 (M4 direction), and the inner hub 110 is also tilted. It will be rotated with respect to the rim 100, and the balance will be slightly deteriorated. However, as shown in FIG. 5, when the inclination direction of the entire first connection arm 140 is opposite to the inclination direction of the entire second connection arm 150, the center of the inner hub 110 is directed toward the M1 direction due to the action of inertia. It deviates from the center of the rim 100. As a result, the inner hub 110 acts on the second connecting arm 150 to rotate the second connecting arm 150 around the third connecting point in the deviation direction M2, and the second connecting arm 150 moves the ring-shaped sheet 130. It will rotate with respect to the rim 100 (M4 direction). However, at this time, the first connecting arm 140 pulls the ring-shaped sheet 130 so as not to rotate with respect to the rim 100 (in the M3 direction), so that the rotation width of the inner hub 110 with respect to the rim 100 is very small. Since the recovery force of the ring-shaped sheet 130 with respect to the inner hub 110 is opposite to the inertial direction, the inner hub 110 is also gentler.

In this embodiment, the number of first connecting arms 140 is equal to the number of second connecting arms 150, and all of them are distributed in an annular array, that is, the first connecting arm 140 and the second connecting arm 150 correspond to each other one by one. To form one arm group. The first bearing 132 and the second bearing 133 are located on the first side and the second side of the ring-shaped sheet 130, respectively, and the first connecting arm 140 and the second connecting arm 150 are more balanced by the time of stress. It may be considered that the first bearing 132 and the corresponding second bearing 133 are located at the same position on the circumference of the ring-shaped sheet 130, that is, the second connection point and the third connection point overlap.

Among them, as shown in FIGS. 6 and 7, the inner hub 110 includes an actuator. The actuator may include a motor 200, a transmission 210, a motor central shaft 220 and a battery 230. The motor 200 may be a brushless motor, which has a rotor 201 and a stator 202. Referring to FIG. 8, the motor central shaft 220 has a first end 221 and a second end 222, and a mounting portion 223 between the first end 221 and the second end 222. The stator 202 is fixed to the mounting portion 223. The transmission 210 includes a case 211 and a group of gears provided within the case 211, the gear group including a central gear 212, some driven gears 213, and a ring gear 214, with the central gear 212 driven. It meshes with the gear 213, and the driven gear 213 meshes with the ring gear 214 to form a star-shaped gear group. The ring gear 214 is fixed to the case 211, and the fourth bearing 112 may be attached to the case 211. Among them, the central gear 212 is fixed to the rotor 201 by covering the motor central shaft 220, and in this way, the central gear 212 is moved so as to rotate around the motor central shaft 220 by rotation, and the driven gear 213. The ring gear 214 was further rotated with the case 211, so that the entire wheel could rotate with respect to the motor central shaft 220 and travel.

In one embodiment, the outer peripheral edge of the case 211 extends toward the stator 202 to form the ring-shaped arm 2111, the connecting portion 2113 is formed on the outer surface of the ring-shaped arm 2111, and the fourth bearing 112 is formed. It may be attached to the connection portion 2113. The side of the ring-shaped arm 2111 close to the first end 221 of the motor central shaft 220 is recessed to form a ring-shaped groove 2112, and the ring-shaped groove 2112 surrounds the stator 202.

The first end 221 of the motor central shaft 220 extends to the outside of the stator 202, and the second end 222 of the motor central shaft 220 extends to the outside of the case 211. The first end 221 has a first connection structure 2211 for fixing the connector 240. The second end 222 has a second connection structure 2221 for fixing the device and attaching the wheels to the device. The connector 240 fixes and connects the battery 230, which secures the battery 230 to the first end 221 of the motor central shaft 220 and attaches it to the wheel, eliminating the need to attach it to other parts of the device and further wheels. The space is fully utilized, and the power supply to the motor 200 has become easy.

The connector 240 may include a positive / negative electrode 241 and an engagement structure 242, wherein the connector 240 has an engagement structure 2312 (eg, a hook) on the battery 230 by means of an engagement structure 242 (eg, a locking groove) on it. The battery 230 is fixed to the first end 221 of the motor central shaft 220 by engaging with (see FIG. 9), and the positive and negative electrodes 241 are the conductive electrodes 233 of the battery 230 (see FIG. 9). Contact with.

The motor central shaft 220 may have a hollow step 224, the hollow step 224 may extend to the first end 221 and a first through hole 2212 may be opened in the wall of the first end 221. A second through hole 225 is further opened in 220, and the first through hole 2212 and the second through hole 225 communicate with the internal hollow. Specifically, the second through hole 225 may be opened on the mounting portion 223 and / or in the vicinity of the second end 222. Then, a cable, for example, an electric wire electrically connected to the positive and negative electrodes 241 and a signal line connected to the controller can be arranged in the hollow stage 224. The cable arrangement method may be set according to the actual situation. For example, a cable electrically connected to the positive and negative electrodes 241 at the first end 221 is inserted into the hollow stage 224 through the first through hole 2212. Subsequently, it can extend from the vicinity of the second end 222 through the second through hole 225, thus facilitating the connection with the controller or the like.

As shown in FIGS. 9 and 10, the battery 230 may include a housing 231 and cells 232 provided in the housing 231, or may include a plurality of cells 232 and be uniformly arranged. The housing 231 forms the slot 2311 close to the first side, the shape of the slot 2311 is substantially the same as the shape of the connector 240, and the connector 240 can be accommodated. A conductive electrode 233 and an engagement structure 2312 that electrically connect to the cell 232 are provided on the side wall of the slot 2311, and the connection method with the connector 240 is as described above, and the description thereof will be omitted here.

With reference to FIGS. 6 and 7, a ring portion 2313 surrounding the slot 2311 is formed on the peripheral edge of the housing 231 on the side of the slot 2311, the middle of the ring portion 2313 is the accommodating groove 2314, and the battery 230 is When engaged with the connector 240, the accommodation groove 2314 can accommodate the stator 202, the ring portion 2313 is accommodated in the ring-shaped groove 2112, and the ring-shaped groove 2112 of the transmission case is accommodated in the ring portion 2313 of the battery 230. It can rotate against it. Since the connecting portion 2113 connected to the second connecting arm 150 is located on the outer surface of the ring-shaped arm 2111, the entire center of gravity is basically the plane where the connecting portion 2113 is located after the battery 230 and the actuator are connected. That is, after the battery 230 and the actuator are coupled, the entire center of gravity is basically on the rim 100 plane, thus providing the rim 100 suspension without the entire tilting to the first or second side. You can pass gently.

In order to easily remove the battery 230 from the connector 240, the battery 230 further includes a toggle block 234, a toggle plate 235 is connected to the anchoring structure 2312, and a spring 236 is connected to the toggle plate 235. The spring 236 temporarily tightens the engagement structure 2312 in the engagement direction. In the initial state, the spring 236 is temporarily tightened, the engagement structure 2312 is engaged with the engagement structure 242, and the battery 230 is fixed to the connector. When the position of the doggle block 234 is changed by an external force, the doggle block 234 moves the doggle plate 235 so as to resist the tightening force of the spring 236 and operates in the direction of disengaging the engagement structure. The doggle plate 235 connected to the 2312 can be detached and the battery 230 can be removed from the connector. Specifically, the doggle block 234 is provided on the rotating shaft 237, the rotating shaft 237 can be connected to the handle 239, and the handle 239 is located on the side of the housing 231 away from the slot 2311. A torsion spring 238 is connected to the rotary shaft 237, and the torsion spring 238 temporarily tightens the rotary shaft 237. In the temporarily tightened state, the doggle block 234 does not come into contact with the doggle plate 235, and the engagement structure 2312 is engaged. Engage with the attachment structure 242, pull the handle 239, the rotating shaft 237 resists the tightening force of the torsion spring 238, the doggle block 234 gradually comes into contact with the toggle plate 235, and the attachment structure 2312 and the attachment structure 242 and 242 are separated, the handle 239 is released, and it recovers again.

The above description is merely a preferred embodiment of the present invention, does not limit the scope of rights of the present invention, and any changes, substitutions, improvements, etc. made without departing from the technical idea of the present invention will be made. Is also included within the scope of protection of the present invention.

Claims (10)

A motor central shaft having a hollow step, having a first end and a second end, and having a mounting portion used for fixing the motor stator between the first end and the second end. hand,
A motor central shaft, characterized in that a first connection structure is provided at the first end, and the first connection structure is connected to the connector so as to fix and connect the battery by the connector. The wall of the motor central shaft is provided with a first through hole and a second through hole that communicate with the hollow stage, and the first through hole is located at the first end and electrically with the battery. The present invention is characterized in that the conducting electric wire is inserted into the hollow step through the first through hole, and the electric wire located in the hollow step extends through the second through hole. The motor central shaft according to 1. The feature is that the second through hole is located at the location of the mounting portion, and a feed line electrically conductive with the battery enters the hollow stage through the first through hole to supply electric power to the motor. The motor central shaft according to claim 2. The motor central shaft according to claim 2, wherein the hollow step extends to the second end, and the second through hole is close to the second end. The motor center according to claim 1, wherein the connector has positive and negative electrodes in contact with the conductive electrode of the battery and a second engagement structure corresponding to the first engagement structure of the battery. axis. It has a hollow stage, has a first end and a second end, and has a mounting portion used for fixing the motor stator between the first end and the second end, and the second end. A motor central shaft with a second connection structure at the end.
A motor central shaft, characterized in that a first connection structure is provided at the first end, a connector is connected to the first connection structure, and the connector is connected to a battery. An actuator that includes a motor and a transmission
The motor central shaft according to any one of claims 1 to 6 is further included, the mounting portion is fixed to the stator of the motor, the rotor of the motor is put on the motor central shaft, and the motor is transmitted to the transmission. An actuator characterized in that the case of the transmission is configured to rotate with respect to the central axis. The outer peripheral edge of the case of the transmission extends toward the stator side to form a ring-shaped arm, and a connection portion is formed on the outer surface of the ring-shaped arm. The actuator according to claim 7, wherein the actuator has a ring-shaped groove that surrounds the ring-shaped groove, and the ring-shaped groove accommodates the ring-shaped portion of the battery. A wheel that includes a rim and an inner hub
A wheel comprising the actuator according to claim 7 or 8, wherein the case of the transmission is connected to the rim. A wheelchair comprising the wheel according to claim 9.

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