JP7616966B2 - Electric hoisting device - Google Patents

Description

The present invention relates to an electric winding device that rotates a rotating body by the rotational drive of an electric motor to wind up a towing member around the rotating body.

Electric hoisting devices, including industrial winches, that use the driving force of an electric motor to hoist or lower objects such as bedding, packaging, temporary scaffolding, structures, fishing equipment, etc. to a designated position have long been known.

In the technical field of fishing reels, electric reels are currently widely used as electric winding devices for boat fishing, especially deep-sea fishing.

These various types of electric winding devices can at least wind the towing member onto a rotating body (e.g., a drum or spool) by rotating the electric motor in the forward direction, and depending on the application, can also unwind the towing member from the rotating body by rotating the electric motor in the reverse direction.

In an electric winding device, the power of the electric motor is generally transmitted to the rotating body via a reduction mechanism. In this case, the electric motor requires sufficient power to rotate and drive the rotating body to wind up the towing member that tows the towed object, and therefore may occupy a large installation space within the device because it is large enough to output such power. On the other hand, even in the reduction mechanism that transmits the power of the electric motor to the rotating body, a high reduction ratio tends to be required in cases where, for example, the electric winding device is installed on a drone to wind up a large, heavy object, or the electric winding device is configured as a fishing reel to reel in a large fish, since a large traction torque must be obtained at the rotating body.

As mentioned above, when a high reduction ratio is required for the reduction mechanism, a planetary gear mechanism may be used as the reduction mechanism, as disclosed in Patent Document 1, for example.

Furthermore, as mentioned above, when the electric motor takes up a large amount of installation space within the device, it is necessary to efficiently secure installation space within the device for the remaining components other than the motor. In particular, when the electric winding device is mounted on a moving object such as a drone or configured as a portable electric winding device such as an electric reel, miniaturization is also required. For example, as disclosed in Patent Document 2, a hollow motor with a through hole can be used as the electric motor, allowing components to be inserted and positioned within the through hole, thereby improving layout flexibility.

JP 2003-284474 A JP 2017-035041 A

However, as disclosed in Patent Document 1, when using a planetary gear mechanism as a reduction mechanism to obtain a high reduction ratio, since the reduction ratio of a single planetary gear is limited, it becomes necessary to install multiple planetary gear mechanisms, which increases the size of the entire electric winding device.

On the other hand, as disclosed in Patent Document 2, when using a hollow electric motor, the diameter of the hollow shaft of the electric motor must be set to a certain degree to ensure its strength (therefore, the outer diameter of the electric motor is inevitably large), and the planetary gear mechanism itself, which is connected to the hollow shaft of the motor so that it can transmit power, also becomes larger accordingly. Specifically, if the electric motor is made hollow while maintaining the reduction ratio, the diameter of the sun gear of the planetary gear also increases due to the larger diameter of the motor's hollow shaft, and the diameter of the internal gear also increases in proportion to this increase, and the planetary gear mechanism itself becomes larger as a whole. In other words, when a planetary gear mechanism is used as a reduction mechanism, it is difficult to reduce the size of the entire device even if the electric motor is made hollow to improve layout.

The present invention was made with a focus on the above-mentioned problems, and aims to provide an electric hoisting device that can reduce the size of the entire device while ensuring a high reduction ratio in the reduction mechanism that transmits the power of the electric motor to the rotor.

In order to achieve the above object, the present invention provides an electric winding device that has a rotating body around which a towing member for towing an object to be wound is wound, and an electric motor, and that transmits the rotational driving force of the electric motor to the rotating body via a reduction mechanism to rotate the rotating body, thereby winding up the towing member around the rotating body, and is characterized in that the reduction mechanism constitutes a cycloid reducer.

Therefore, according to the above configuration, since the reduction mechanism constitutes a cycloid reducer, the reduction mechanism alone can ensure a high reduction ratio. In other words, since there is no need to install multiple reduction mechanisms to obtain a high reduction ratio, as in the case of using a planetary gear mechanism as the reduction mechanism, a high reduction ratio can be obtained without increasing the size of the entire electric winding device (for example, without increasing the size of the entire device in the axial direction by arranging multiple planetary gear mechanisms along the axial direction).

In addition, by using a cycloid reducer as the reduction mechanism in this way, the entire reduction mechanism does not need to be made larger even when a hollow electric motor is used. In other words, the cycloid reducer can avoid the aforementioned problem of an increase in the gear diameter due to an increase in the diameter of the hollow motor shaft, as in the case of a planetary gear mechanism, so even if the electric motor is hollow, it is possible to reduce the size of the entire device while maintaining a high reduction ratio.

In the above configuration, it is preferable that the electric motor has a hollow shape with a through hole extending coaxially with the rotation axis of the rotor, and that the components constituting the electric winding device are inserted and arranged in the through hole. This allows the through hole of the electric motor to be effectively used as a component arrangement space to improve layout flexibility, thereby making it possible to reduce the size of the entire device. In addition to being able to effectively use the through hole (ensuring high layout flexibility) in this way, the adoption of a cycloid reducer can avoid the increase in size of the reducer that accompanies making the motor hollow, thereby contributing to further miniaturization of the entire device. In other words, the combination of a cycloid reducer and a hollow motor makes it possible to simultaneously and effectively achieve two goals: a high reduction ratio and a compact device.

In addition, with this configuration, the electric motor, which requires sufficient power to rotate the rotor to wind up the towing member that tows the object to be hoisted (the towed object) and can occupy a large installation space in the device, is provided with a through hole extending coaxially with the rotation axis of the rotor, and the components that make up the electric hoisting device are inserted and arranged in this through hole. Therefore, for example, when mechanically or electrically connecting the components of the device located on both sides of the electric motor, the connecting element that achieves the connection can be arranged in the through hole as the said member, thereby preventing the connection path from being cut off by the electric motor. As a result, the connection path does not have to make a large detour around the electric motor, so there is no need to secure space for such a detour path, and the device can be prevented from becoming large in size. In addition, by efficiently and effectively using the through hole, the device can be made smaller. Here, "component" refers to the parts of the electric hoist device that are located on one side or the other of the electric motor and are not inserted into the through-hole of the electric motor, and "member" refers to the parts of the electric hoist device that are inserted into the through-hole of the electric motor (such as the connecting element mentioned above).

Furthermore, if a through hole is provided in the electric motor in this way and the through hole can be used as a space for arranging components, it is possible to avoid a situation in which the components of the device themselves are separated by the electric motor. Therefore, for example, the bearing support position etc. can be set in a functionally and structurally advantageous manner, and problems such as increased volume and increased torque loss can be avoided (structural and functional optimization can be achieved).

In addition, in the above configuration, the through-hole of the electric motor in particular forms a transmission path for transmitting mechanical force (particularly, driving force) or electrical signals between components located on one side of the electric motor and components located on the other side and/or the electric motor, thereby enabling efficient and efficient force and signal transmission, allowing the device to be optimized functionally and structurally, and also contributing to the miniaturization of the device. Here, "electrical signal" refers to a broad concept that includes all electrical flows, including electrical energy such as current, voltage, and power, and electrical detection signals.

In the above configuration, the electric motor can be positioned relative to the rotating body in any way. For example, the electric motor may be positioned within the rotating body, but the present invention can be particularly useful in terms of miniaturizing the device when the electric motor is axially arranged alongside the rotating body. In the above configuration, the through hole may be formed in different ways depending on the structural form of the electric motor, but when the through hole is formed by the rotor, it is advantageous in that a rotational driving force can be output through the through hole.

In the above configuration, the reducer preferably has a hollow shape with a through hole extending coaxially with the input member that receives the rotational drive force from the electric motor, and the through hole is inserted and arranged to accommodate the components that make up the electric hoisting device. This configuration is useful when the hollow electric motor and the reducer are combined into a unit to operate as a geared motor. In this case, it is preferable to provide a similar through hole in the reducer that is coaxial with the through hole of the electric motor, thereby making the geared motor hollow. By arranging the components that perform the connection in the hollow part of the geared motor when mechanically or electrically connecting the components, it is possible to avoid a situation in which the connection path is cut off by the geared motor. Of course, the effect is the same even if the geared motor does not take the form of a unit. By connecting the components through the electric motor and the reducer, it is possible to obtain space saving (structural optimization) for the entire device, which is beneficial.

In the above configuration, the electric motor has a hollow shape with a through hole extending coaxially with the rotation axis of the rotor, the reducer has a hollow shape with a through hole extending coaxially with its input member that receives a rotational driving force from the electric motor, the rotor has a through hole extending coaxially with its rotation axis, the reduction mechanism is arranged in parallel in the axial direction between the electric motor and the rotor, the through hole of the reduction mechanism coaxially communicates with the through hole of the rotor and the through hole of the electric motor, and the members constituting the electric winding device are inserted and arranged in the through holes of the rotor, the reduction mechanism, and the electric motor. In this way, if the through holes arranged in parallel with each other in the axial direction are arranged coaxially in communication with each other, the concentricity of each component can be easily ensured, in combination with the insertion arrangement of the members (for example, the above-mentioned connecting element) through these through holes, and the positional relationship between the components can be ensured with high precision. In addition, because the through hole of the cycloid reducer and the through hole of the electric motor are coaxial, the rotational driving force of the electric motor can be efficiently transmitted to the cycloid reducer.

In the above configuration, the electric winding device constitutes an electric fishing reel, and the electric fishing reel has a lever member that can be rotated to switch between a power transmission state in which the power of the electric motor can be transmitted to the rotating body and a power interruption state in which the power transmission from the electric motor to the rotating body is interrupted, and it is preferable that a transmission rod that transmits the rotational force of the lever member to the rotating body is inserted into the through holes of the rotating body, the reduction mechanism, and the electric motor as a member that constitutes the electric winding device.

In the case of electric fishing reels, for example, in a drag mechanism that applies a braking force to the rotation of the spool, which is a rotating body, the braking mechanism is generally mounted on a handle shaft separate from the motor shaft (such as a star drag), so even if the electric motor is made hollow and a cycloid reducer is used, there is a limit to how much layout can be improved, and the overall size of the device cannot be efficiently reduced. However, if the electric motor, cycloid reducer, and rotating body are all made hollow and their through holes are arranged coaxially and in communication, a linear component arrangement space can be secured, which dramatically improves layout flexibility. It is also possible to form the transmission rod that transmits the rotational operating force of the lever member to the rotating body as a single member extending coaxially with the rotating body's axis and arrange it in the space. Therefore, the state switching mechanism can be arranged in a straight line along the transmission rod (coaxially with the motor's axis), simplifying the structure, and the transmission rod can efficiently transmit large forces.

In the above configuration, the reduction mechanism preferably has an output member that reduces the rotation input from the electric motor and outputs it, and the axial movement of the transmission rod accompanying the rotational operation of the lever member causes the rotor to move axially and press against a friction plate that rotates integrally with the output member, and the friction force in the rotational direction generated on the friction plate according to the magnitude of the pressing force transmits the rotational drive force from the electric motor to the rotor. This allows the transmission rod to realize a compact device while also configuring a drag mechanism that is compatible with the high reduction ratio of the cycloid reducer. In other words, if a high reduction ratio is obtained by adopting a cycloid reducer, the transmission torque also increases, and therefore the drag mechanism also needs to have a high capacity. However, as described above, by arranging the transmission rod as a single member that extends coaxially with the rotor and the rotating shaft of the electric motor to improve layout, it is possible to increase the capacity of the drag mechanism, and as a result, it is possible to obtain a drag mechanism that is compatible with the high reduction ratio of the cycloid reducer.

The present invention provides an electric winding device that can reduce the size of the entire device while ensuring a high reduction ratio in the reduction mechanism that transmits the power of the electric motor to the rotor.

1 is a perspective view showing the appearance of an electric winding device according to an embodiment of the present invention; FIG. 2 is a cross-sectional view showing a main configuration of the electric winding device of FIG. 1 . 2 is a perspective view of a cycloid reducer constituting the reduction mechanism of the electric winding device of FIG. 1 . 4A is a front view of the cycloid reducer of FIG. 3, and FIG. 4B is a side view of the cycloid reducer of FIG. 3. 4A is a cross-sectional view taken along line AA in FIG. 4A, and FIG. 4B is a cross-sectional view taken along line BB in FIG. 4B.

The following describes the electric winding device of the present invention, taking an electric fishing reel as an example, with reference to the drawings. However, the present invention is not limited to electric fishing reels, and can of course be applied to all electric winding devices, including industrial winches, that use the driving force of an electric motor to wind up or lower objects such as bedding, packaging, temporary scaffolding, buildings, fishing equipment, etc. to a specified position. In addition, components that are common to multiple figures are given the same reference numerals throughout the multiple figures, and descriptions of components that have already been explained will be omitted.

Figures 1 and 2 show an electric fishing reel (hereinafter simply referred to as an electric reel) 10 as an electric winding device according to one embodiment of the present invention. Here, Figure 1 is a perspective view showing the exterior of the electric reel 10 according to this embodiment, and Figure 2 is a cross-sectional view showing the main components of the electric reel 10 according to this embodiment.

In the figure, reference number 1 is a frame, and reference number 2 is a side plate attached to one side of the frame 1 so as to cover the opening of the frame 1, and the frame 1 and side plate 2 form the exterior of the electric reel 1. The side plate 2 plays a role in positioning the electric motor 3 and spool 4, which will be described later.

As shown in the figure, the electric reel 10 has a spool 4 as a rotating body around which the fishing line as a towing member is wound, and an electric motor 3. The spool 4 is rotated by the rotational drive of the electric motor 3 to wind the fishing line onto the spool 4. When the electric motor 3 is involved in the winding drive in this way, the electric motor 3 requires sufficient power to drive the spool 4, which rotates to wind up the winding object (towing object) such as a fish or a tackle, and therefore has a size sufficient to output such power. Therefore, as shown in FIG. 1, the electric motor 3 occupies a large installation space within the electric reel 10 (in some cases, it occupies almost half the axial space of the entire electric reel 10). The electric motor 3 may have any structural form, but in this embodiment, it has the same structural form as the motor disclosed in Utility Model Registration No. 3228782, for example.

Specifically, the electric motor 3 has a stator 3a made of a soft magnetic material supported by the side plate 2 so as to be coaxial with the spool 4, and the stator 3a has a plurality of supports 3aa, 3ab arranged to form two concentric ring bodies while extending axially toward the spool 4 side. Of these supports 3aa, 3ab, each of the inner supports 3aa forming the inner ring body supports a corresponding ring-shaped first coil 3b, and each of the outer supports 3ab forming the outer ring body supports a corresponding ring-shaped second coil 3c. In this case, each coil 3b, 3c plays a role of exciting the stator 3a, and is supported in a state in which its inner peripheral surface fits into the outer peripheral surface of the corresponding support 3aa, 3ab.

The electric motor 3 also has a rotor 3d rotatably supported by the stator 3a, and the rotor 3d has an outer annular portion 3da that extends in the axial direction so as to enter the annular space between the outer annular body formed by the outer support 3ab of the stator 3a and the inner annular body formed by the inner support 3aa of the stator 3a, and an inner annular portion 3db that extends in the axial direction inside the inner support 3aa of the stator 3a and is rotatably supported by the stator 3a via ball bearings 3g and 3h. In this case, the outer annular portion 3da supports and fixes the magnets 3e and 3f, and the inner annular portion 3db forms a through hole 9 of the electric motor 3 that extends coaxially with the rotation axis O of the rotor 3d. That is, in this embodiment, the electric motor 3 has a hollow shape with a through hole 9 that extends coaxially with the rotation axis O of the rotor 3d.

The electric motor 3 may have other structural forms as long as it is hollow and has a through hole 9, for example, it may have the structural form of a brush motor or a stepping motor.

The spool 4, which is a rotating body arranged coaxially with the electric motor 3, is rotatably supported via ball bearings 5 and 6. In this case, the inner ring side of the ball bearings 5 and 6 is fitted and supported by a transmission rod 36, which will be described later. The spool 4 also has a through hole 4a that extends coaxially through the spool 4 with the rotation axis O, and this through hole 4a is positioned coaxially in communication with the through hole 9 of the electric motor 3.

In addition, as shown in the figure, the rotational driving force is transmitted from the electric motor 3 to the spool 4 via a reduction mechanism 44 arranged in parallel in the axial direction between the electric motor 3 and the spool 4. In this case, the reduction mechanism 44 is a known hollow cycloid reducer as disclosed in, for example, JP 2018-189237 A, and has a through hole 44a that coaxially connects the through hole 4a of the spool 4 and the through hole 9 of the electric motor 3, and is configured to reduce the rotation input from the electric motor 3 and output it to the output member 45.

Specifically, as shown in Figures 3 to 5, the cycloid reducer 44 of this embodiment has an input member (coaxial with the rotation axis O) 44g to which a rotational driving force is input from the electric motor 3 via its rotor output part 3dc, a ring-shaped cycloid disk 44f having external teeth on its outer periphery that is eccentrically rotatably fitted to the outer periphery of the input member 44g via balls 44i held by a retainer 44d, an annular internal tooth ring 44c that is positioned on the outer periphery of the cycloid disk 44f and supported non-rotatably by the side plate 2, has internal teeth on its inner periphery that mesh with the external teeth of the cycloid disk 44f, and an output member 45 that engages with the cycloid disk 44f and rotates with the rotation of the cycloid disk 44f.

In this case, the input member 44g is fitted to the inner peripheral surface of the cycloid disk 44f and is supported by a support ring 44e interposed between the cycloid disk 44f and the internal tooth ring 44c. In addition, the output member 45 has a plurality of protrusions 45a arranged at predetermined angular intervals along the outer periphery, which engage with holes 44j arranged corresponding to the cycloid disk 44f, and receives a rotational force from the cycloid disk 44f as each protrusion 45a revolves within the hole 44j with the eccentric rotation of the cycloid disk 44f. The internal tooth ring 44c is covered on both sides (input and output sides) by an upper cover 44k and a lower cover 44b, and a balance weight 44h is held on the inner peripheral surface of the input member 44g. Furthermore, balls 44i held by retainers 44d are inserted between the covers 44b, 44k and the output member 45 and the input member 44g, and between the output member 45 and the input member 44g and the inner tooth ring 44c (support ring 44e). The through hole 44a of the reduction mechanism 44 is formed by the inner hole of the annular output member 45 and the input member 44g.

Therefore, according to the above configuration, when the input member 44g rotates once around the rotation axis O, the cycloid disk 44f fitted to the eccentric cylinder 44ga of the input member 44g revolves once around the rotation axis O, and at that time, the external teeth 44fa provided on the outer periphery of the cycloid disk 44f go over one internal tooth 44ca of the internal tooth ring 44c (the cycloid disk 44f rotates around the rotation axis O by one tooth of the internal tooth 44ca). As a result, the rotation input from the electric motor 3 through the rotor output part 3dc is decelerated to one times the number of teeth of the internal tooth 44ca. The rotation decelerated to the cycloid disk 44f is transmitted to the output member 45 by the hole 44j of the cycloid disk 44f pushing the protruding part 45a in the direction of rotation around the rotation axis O. In addition, by configuring the hole 44j of the cycloid disk 44f to be revolvable around the central axis of the protrusion 45a, the revolution motion of the cycloid disk 44f around the rotation axis O is not transmitted to the output member 45.

This operating principle allows the cycloid reduction ratio to be 1/the number of teeth on the internal teeth 44ca of the internal toothed ring 44c. For example, if the number of teeth on the internal teeth 44ca of the internal toothed ring 44c is 30, the reduction ratio is 1/30 (the cycloid reduction ratio can be set to a range of approximately 10 to 100).

In the case of a conventional planetary gear reducer, since it is necessary to place the sun gear mechanism in the center, if the planetary gear mechanism is made into a hollow structure, it is not possible to provide an opening larger than the diameter of the sun gear. Also, to obtain a high reduction ratio with the planetary gear mechanism, it is necessary to reduce the number of teeth of the sun gear (reduce the diameter). Therefore, it is difficult to achieve both a high reduction ratio and a hollow shape with the planetary gear mechanism. Also, the reduction ratio of a planetary gear mechanism is usually lower than 1/10 in one stage. In contrast, in the cycloid reducer of this embodiment, the reduction ratio is determined by the number of teeth of the internal gear, and even if a large reduction ratio is achieved, there is no need to reduce the diameter of the input member placed in the center. Therefore, it is possible to achieve both a high reduction ratio (a reduction ratio higher than that of the planetary gear alone can be obtained by itself) and a hollow structure.

In FIG. 2, reference numeral 33 denotes a spool-side friction plate fixed to the spool 4, reference numeral 34 denotes a drive-side friction plate positioned opposite the spool-side friction plate 33 and transmitting the rotational drive force of the electric motor 3 to the spool 4 by the frictional force in the rotational direction generated between the spool-side friction plate 33, and reference numeral 35 denotes a drag force adjustment knob that is screwed into a transmission rod 36 (described later) and adjusts the frictional force in the rotational direction generated between the spool-side friction plate 33 and the drive-side friction plate 34 (hereinafter, the frictional force is referred to as the drag force).

In addition, a transmission rod 36 that constitutes a drag mechanism that applies a braking force to the rotation of the spool 4 is inserted into the through hole 9 of the electric motor 3, the through hole 44a of the reduction mechanism 44, and the through hole 4a of the spool 4 as a component of the electric reel 10. This transmission rod 36 is supported by the frame 1 and the side plate 2, and its movement in the rotational direction is restricted by a pin 37 that is inserted into the transmission rod 36 and has its side engaged with the frame 1. As a result, when the degree of tightening of the drag force adjustment knob 35 that is screwed into the transmission rod 36 is changed, the transmission rod 36 moves in the axial direction accordingly.

A transmission pin 38 is press-fitted and fixed to the transmission rod 36, and this transmission pin 38 can axially press the inner ring side of the ball bearing 5 that rotatably supports the spool 4 via an elastic member 39 arranged coaxially with the transmission rod 36 by the axial movement of the transmission rod 36. As a result, a pressing force according to the position of the transmission rod 36 is applied to the spool 4, and this pressing force becomes a pressing force between the spool side friction plate 33 fixed to the spool 4 and the drive side friction plate 34 driven by the electric motor 3.

A support rod 49 is coaxially fitted to the outer periphery of the transmission rod 36. This support rod 49 rotates in sync with the drive side friction plate 34, and generates an equal reaction force to the axial pressing force applied from the spool side friction plate 33 toward the drive side friction plate 34. In this case, one end of the support rod 49 presses in the axial direction against the inner ring side of the ball bearing 40 that rotatably supports the support rod 49, and the axial pressing force from the spool 4 side is supported by the side plate 2 via the ball bearing 40.

A lever member 41 is rotatably fitted and supported on the side plate 2, and this lever member 41 switches the spool side friction plate 33 and the drive side friction plate 34 between a contact state and a non-contact state. A cam member 42 is fixed to the lever member 41, and a slope (not shown) is formed on this cam member 42 at the contact portion with the opposing cam mating member 43. This slope is designed to convert the amount of movement of the lever member 41 in the rotation direction into the axial movement of the cam mating member 43, so that the cam mating member 43 moves in the axial direction in response to the rotation of the lever member 41. In addition, the cam mating member 43 is in contact with the drag force adjustment knob 35, and the amount of axial movement of the cam mating member 43 is the amount of movement of the drag force adjustment knob 35. As mentioned above, the drag force adjustment knob 35 is connected to the spool 4 via the transmission rod 36, transmission pin 38, and elastic member 39, so that the spool 4 moves in the axial direction when the lever member 41 is rotated, and therefore the lever member 41 can switch the spool side friction plate 33 and the drive side friction plate 34 between a contact state and a non-contact state.

In addition, in this embodiment, the driving side friction plate 34 rotates integrally with the output member 45 of the reduction mechanism 44, so that the rotational operation of the lever member 41 can switch between a power transmission state in which the power of the electric motor 3 can be transmitted to the spool 4 and a power interruption state in which the power transmission from the electric motor 3 to the spool 4 is interrupted, and the adjustment operation of the drag force adjustment knob 35 can adjust the drag force in the power transmission state. In other words, the force in the spool axial direction generated by the adjustment mechanism consisting of the lever member 41, the cam mating member 43, the cam member 42, and the drag force adjustment knob 35 is transmitted in the order of the transmission rod 36, the spool 4, the driving side friction plate 34, the support rod 36, and the side plate 2. These parts constitute the side plate unit, and the transmission path of the pressing force is optimized to be completed within the unit. This eliminates the influence of the pressing force on the parts that constitute other units, and improves reliability. In addition, the optimization of the configuration can also be expected to reduce the size of the entire reel.

As described above, according to this embodiment, the reduction mechanism 44 constitutes a cycloid reducer, so the reduction mechanism 44 alone can ensure a high reduction ratio. In other words, since there is no need to install multiple reduction mechanisms to obtain a high reduction ratio, as in the case of using a planetary gear mechanism as the reduction mechanism, a high reduction ratio can be obtained without increasing the size of the entire electric reel 10 as an electric winding device.

In addition, by using a cycloid reducer as the reduction mechanism 44 in this way, even if a hollow electric motor 3 is used as in this embodiment, the reduction mechanism 44 as a whole does not need to be made larger. In other words, the cycloid reducer does not cause the problem mentioned above of an increase in the diameter of the gears due to an increase in the diameter of the hollow motor shaft, as in the case of a planetary gear mechanism, so even if the electric motor 3 is made hollow, it is possible to reduce the size of the entire electric reel 10 while maintaining a high reduction ratio.

In addition, in this embodiment, the transmission rod 36 that transmits the pressing force for generating the drag force and the support rod 49 that receives the pressing force are inserted and arranged in the through hole 9 of the electric motor 3 and the through hole 44a of the reduction mechanism 44. That is, in this embodiment, the through hole 9 is arranged to form a transmission path that transmits mechanical force between the spool 4, which is a component that constitutes the electric reel 10 and is located on one side of the electric motor 3, and the lever member 41, which is a component that constitutes the electric reel 10 and is located on the other side of the electric motor 3. For this reason, the through hole 9 is arranged to insert and arrange the connecting element that connects the spool 4 and the lever member 41 as the component that constitutes the electric reel 10, specifically the transmission rod 36 and the support rod 49 that constitute the drag mechanism. This makes it possible to avoid the disconnection of the connection path by the electric motor 3, thereby realizing the miniaturization of the entire electric reel 10 and the optimization of its functions.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiments, the configuration of the cycloid reducer is not limited to the above-described configuration. Also, in the above-described embodiments, the towing member is a fishing line, but if the electric winding device constitutes a winch or the like, the towing member may be a metal wire or the like. Also, some or all of the above-described embodiments may be combined, or part of the configuration may be omitted from one of the above-described embodiments, without departing from the spirit of the present invention.

10 Electric reel (electric winding device)
3 Electric motor 3d Rotor 4 Spool (rotating body)
4a Through hole 9 Through hole 34 Friction plate 36 Transmission rod 41 Lever member 44 Speed reduction mechanism 44a Through hole 45 Output member

Claims (1)

An electric hoisting device having a rotating body around which a pulling member for pulling an object to be hoisted is wound, and an electric motor, the electric motor transmitting a rotational driving force to the rotating body via a reduction mechanism to rotate the rotating body, thereby winding up the pulling member around the rotating body,
The electric winding device is configured as an electric fishing reel having a lever member that can be turned to switch between a power transmission state in which the power of the electric motor can be transmitted to the rotating body and a power interruption state in which the power transmission from the electric motor to the rotating body is interrupted,
the electric motor is hollow and has a through hole extending coaxially with the rotation axis of its rotor, the reduction mechanism constitutes a cycloid reducer and is hollow and has a through hole extending coaxially with an input member that receives a rotational driving force from the electric motor, the rotating body has a through hole extending coaxially with the rotation axis, the reduction mechanism is axially arranged between the electric motor and the rotating body, the through hole of the reduction mechanism coaxially communicates the through hole of the rotating body and the through hole of the electric motor, and a transmission rod that transmits the rotational operating force of the lever member to the rotating body is inserted and arranged in each of the through holes of the rotating body, the reduction mechanism, and the electric motor,
The reduction mechanism has an output member that reduces the speed of the rotation input from the electric motor and outputs the reduced speed, and the axial movement of the transmission rod accompanying the rotational operation of the lever member causes the rotating body to move axially and be pressed against a friction plate that rotates integrally with the output member, and a rotational friction force generated in the friction plate in accordance with the magnitude of the pressing force transmits a rotational driving force from the electric motor to the rotating body.

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