Electric hoisting device

Abstract

To provide an electric winding device capable of downsizing the entire device while securing a high speed-reduction ratio of a speed reduction mechanism that transmits power of an electric motor to a rotor.SOLUTION: An electric winding device 10 according to the present invention includes a rotor 4 around which a traction member for traction of a winding target object is wound, and an electric motor 3. Winding of the traction member with respect to the rotor 4 is performed by transmitting a rotation drive force of the electric motor 3 to the rotor 4 via a speed reduction mechanism 44 included in a cycloid speed reducer to rotate the rotor 4.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] 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 pulling member around the rotating body. [Background technology]

[0002] 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 been generally known for some time.

[0003] Also, in the technical field of fishing reels, electric reels are currently widely used as electric winding devices for boat fishing, particularly deep-sea fishing.

[0004] 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.

[0005] In the electric winding device, the power of the electric motor is generally transmitted to the rotor via a reduction mechanism. In this case, the electric motor requires sufficient power to rotate the rotor to wind up the towing member that tows the towed object, and therefore has a sufficient size to output such power, and may occupy a large installation space in the device. On the other hand, the reduction mechanism that transmits the power of the electric motor to the rotor also tends to require a high reduction ratio, for example, when the electric winding device is installed on a drone to wind up a large heavy object, or when the electric winding device is configured as a fishing reel to wind up a large fish, since it is necessary to obtain a large traction torque at the rotor.

[0006] As described 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.

[0007] Furthermore, as mentioned above, when the electric motor occupies a large installation space within the device, it is necessary to efficiently secure installation space within the device for the remaining parts other than the motor, and since miniaturization is required particularly when the electric winding device is mounted on a moving body such as a drone or configured as a portable electric winding device such as an electric reel, it is possible to consider using a hollow motor with a through hole as the electric motor, for example, as disclosed in Patent Document 2, and allowing parts to be inserted and positioned within the through hole, thereby improving layout flexibility. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2003-284474 A [Patent Document 2] JP 2017-035041 A Summary of the Invention [Problem to be solved by the invention]

[0009] However, as disclosed in Patent Document 1, when using a planetary gear mechanism as a reduction mechanism to obtain a high reduction ratio, since there is a limit to the reduction ratio that can be achieved with a planetary gear alone, it becomes necessary to install multiple planetary gear mechanisms, which increases the size of the entire electric winding device.

[0010] 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 needs to be set to a certain degree to ensure its strength (therefore, the outer diameter of the electric motor also inevitably becomes large), and accordingly, the planetary gear mechanism itself, which is connected to the hollow shaft of the motor so as to be capable of transmitting power, also becomes larger. 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 in conjunction with the increase in the diameter of the hollow shaft of the motor, 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 flexibility.

[0011] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide an electric hoisting device that can reduce the size of the entire device while ensuring a high reduction ratio of the reduction mechanism that transmits the power of the electric motor to the rotor. [Means for solving the problem]

[0012] In order to achieve the above-mentioned object, the present invention provides an electric winding device having a rotating body around which a pulling member for pulling an object to be wound up is wound, and an electric motor, and which 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 pulling member around the rotating body, and is characterized in that the reduction mechanism constitutes a cycloid reducer.

[0013] 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).

[0014] Furthermore, by using a cycloid reducer as the reduction mechanism, 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 above-mentioned 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 that even if the electric motor is hollow, it is possible to reduce the size of the entire device while maintaining a high reduction ratio.

[0015] In the above configuration, it is preferable that the electric motor is hollow and has 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 space for arranging components to improve layout flexibility, and therefore the overall device can be made smaller. 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, which contributes to further miniaturization of the entire device. In other words, the combination of a cycloid reducer and a hollow motor allows the two goals of a high reduction ratio and a compact device to be simultaneously and effectively achieved.

[0016] In addition, according to 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 may 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 members constituting the electric hoisting device are inserted and arranged in this through hole, so that, for example, when mechanically or electrically connecting the components of the device located on both sides of the electric motor, a connecting element that achieves the connection can be arranged in the through hole as the 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 utilizing the through hole, the device can be made smaller in size. Here, "component" refers to those parts of the electric hoisting device that are positioned on one or the other side of the electric motor and are not inserted into the through hole of the electric motor, and "member" refers to those parts of the electric hoisting device that are inserted into the through hole of the electric motor (for example, the connecting element mentioned above).

[0017] Furthermore, if a through hole can be provided in the electric motor in this way and this through hole can be used as 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.As a result, 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).

[0018] 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, enabling the device to be optimized in terms of function and structure, and also contributing to 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.

[0019] In the above configuration, the electric motor may be disposed in any manner relative to the rotor. For example, the electric motor may be disposed within the rotor, but the present invention is particularly useful for miniaturizing the device when the electric motor is axially arranged in parallel with the rotor. In the above configuration, the through hole may be formed in a different manner 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.

[0020] In the above configuration, it is preferable that the reducer is hollow and has a through hole extending coaxially with the input member that receives the rotational drive force from the electric motor, and that the member that constitutes the electric winding device is inserted and disposed in the through hole. Such a configuration is useful when the hollow electric motor and the reducer are unitized and operated as a geared motor. In this case, it is preferable that the reducer is provided with a similar through hole coaxially with the through hole of the electric motor, thereby making the geared motor hollow. By disposing the member that performs the connection when mechanically or electrically connecting the components to each other in the hollow part of the geared motor, 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 configuration is not a geared motor unit. By connecting the components through the electric motor and the reducer, it is possible to obtain space saving (structural optimization) of the entire device, which is advantageous.

[0021] In the above configuration, it is preferable that the electric motor has a hollow shape having a through hole extending coaxially with the rotation axis of the rotor, the reducer has a hollow shape having 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 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 in communication with each other and coaxially, together with the insertion and arrangement of members (for example, the above-mentioned connecting element) through these through holes, the concentricity of each component can be easily ensured, and the positional relationship between the components can be ensured with high precision. Furthermore, since 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.

[0022] Furthermore, in the above configuration, it is preferable that the electric winding device forms 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 cut-off state in which the power transmission from the electric motor to the rotating body is cut off, and 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 forms the electric winding device.

[0023] In the case of an electric fishing reel, for example, in a drag mechanism that applies a braking force to the rotation of a spool, which is a rotating body, the braking mechanism is generally provided on a handle shaft separate from the rotating shaft of the motor (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 also becomes possible to form the transmission rod that transmits the rotational operating force of the lever member to the rotating body side as a single component that extends coaxially with the rotating shaft of the rotating body and arrange it in that space. Therefore, the mechanism for switching states can be arranged in a straight line along the transmission rod (coaxially with the rotating shaft of the motor), simplifying the structure and making it possible to efficiently transmit a large force by the transmission rod.

[0024] In the above configuration, it is preferable that 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 rotor to move in the axial direction 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 driving force from the electric motor to the rotor. According to this, the transmission rod can realize a compact device while also configuring a drag mechanism that is compatible with the high reduction ratio of the cycloid reducer. That is, when a high reduction ratio is obtained by adopting a cycloid reducer, the transmission torque also increases, and accordingly the drag mechanism needs to have a high capacity. However, as described above, by arranging the transmission rod as a single member extending coaxially with the rotation axis of the rotor and the electric motor to improve the 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. Effect of the Invention

[0025] According to the present invention, an electric winding device can be obtained that can ensure a high reduction ratio of the reduction mechanism that transmits the power of the electric motor to the rotor while achieving a reduction in the size of the entire device. [Brief description of the drawings]

[0026] [Figure 1] 1 is a perspective view showing the appearance of an electric winding device according to an embodiment of the present invention; [Diagram 2] 2 is a cross-sectional view showing a configuration of a main part of the electric winding device of FIG. 1. [Diagram 3] 2 is a perspective view of a cycloid reducer that constitutes the reduction mechanism of the electric winding device of FIG. 1. [Figure 4] 4(a) is a front view of the cycloid reducer of FIG. 3, and (b) is a side view of the cycloid reducer of FIG. [Diagram 5] 4(a) is a cross-sectional view taken along line AA in FIG. 4(a), and FIG. 4(b) is a cross-sectional view taken along line BB in FIG. 4(b). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] The electric winding device according to the present invention will be described below with reference to the drawings, taking an electric fishing reel as an example, but it goes without saying that the present invention is not limited to electric fishing reels, and can 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 predetermined position. Also, 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.

[0028] 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, Fig. 1 is a perspective view showing the appearance of the electric reel 10 according to this embodiment, and Fig. 2 is a cross-sectional view showing the main configuration of the electric reel 10 according to this embodiment.

[0029] In the drawing, reference symbol 1 is a frame, and reference symbol 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.

[0030] As shown in the figure, the electric reel 10 has a spool 4 as a rotating body around which a fishing line as a towing member is wound, and an electric motor 3, and 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 that rotates to wind up a winding object (a towed object) such as a fish or a tackle, and therefore has a size sufficient to output such power, and therefore occupies a large installation space within the electric reel 10 as shown in FIG. 1 (in some cases, the electric motor 3 occupies almost half of 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, for example, Utility Model Registration No. 3228782.

[0031] 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 annular bodies while extending in the axial direction toward the spool 4. Of these supports 3aa, 3ab, each of the inner supports 3aa forming the inner annular body supports a corresponding annular first coil 3b, and each of the outer supports 3ab forming the outer annular body supports a corresponding annular second coil 3c. In this case, each of the coils 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.

[0032] The electric motor 3 has a rotor 3d rotatably supported by the stator 3a, and the rotor 3d has an outer annular portion 3da extending in the axial direction so as to enter an annular space between an outer annular body formed by the outer support 3ab of the stator 3a and an inner annular body formed by the inner support 3aa of the stator 3a, and an inner annular portion 3db extending in the axial direction inside the inner support 3aa of the stator 3a and 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 extending coaxially with the rotation axis O of the rotor 3d. That is, in this embodiment, the electric motor 3 has a hollow shape having a through hole 9 extending coaxially with the rotation axis O of the rotor 3d.

[0033] The electric motor 3 may have another structural form as long as it is a hollow form having the through hole 9, for example, it may have the structural form of a brush motor or a stepping motor.

[0034] The spool 4, which serves as 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 sides of the ball bearings 5 ​​and 6 are fitted and supported by a transmission rod 36, which will be described later. The spool 4 has a through hole 4a extending therethrough coaxially with the rotation axis O of the spool 4, and this through hole 4a is positioned coaxially with and communicates with a through hole 9 of the electric motor 3.

[0035] As shown in the figure, the spool 4 is adapted to receive a rotational driving force from the electric motor 3 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 adapted to reduce the rotation input from the electric motor 3 and output it to the output member 45.

[0036] Specifically, as shown in Figs. 3 to 5, the cycloid reducer 44 of this embodiment includes 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 portion 3dc, a ring-shaped cycloid disk 44f having external teeth on its outer periphery and 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 positioned on the outer periphery of the cycloid disk 44f, non-rotatably supported by the side plate 2, and having 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.

[0037] In this case, the input member 44g is fitted to the inner peripheral surface of the cycloid disk 44f and supported by a support ring 44e interposed between the cycloid disk 44f and the internal toothed ring 44c. The output member 45 has a plurality of protrusions 45a provided at predetermined angular intervals along the outer periphery and engaged with holes 44j provided corresponding to the cycloid disk 44f, and receives a rotational force from the cycloid disk 44f by revolving each protrusion 45a in the hole 44j with the eccentric rotation of the cycloid disk 44f. The internal toothed 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 interposed 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 internal tooth ring 44c (support ring 44e). The through hole 44a of the reduction gear mechanism 44 is formed by the inner hole of the annular output member 45 and the input member 44g.

[0038] 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 about the rotation axis O is not transmitted to the output member 45.

[0039] Due to this operating principle, the reduction ratio of the cycloid can be set to 1 / the number of teeth of the internal teeth 44ca of the internal toothed ring 44c. For example, if the number of teeth of the internal teeth 44ca of the internal toothed ring 44c is 30, the reduction ratio is 1 / 30 (the cycloidal reduction ratio can be set to a reduction ratio of approximately 10 to 100).

[0040] In the case of a conventional planetary gear reducer, since it is necessary to place the sun gear mechanism in the center, when 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, in order 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 planetary gear mechanism usually has a reduction ratio 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.

[0041] In FIG. 2, reference symbol 33 is a spool-side friction plate fixed to the spool 4, reference symbol 34 is a drive-side friction plate located opposite the spool-side friction plate 33 and transmits the rotational drive force of the electric motor 3 to the spool 4 by means of the frictional force in the rotational direction generated between the spool-side friction plate 33, and reference symbol 35 is 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 will be referred to as drag force).

[0042] Furthermore, a transmission rod 36 constituting a drag mechanism that applies a braking force to the rotation of the spool 4, as a component of the electric reel 10, is inserted into the through hole 9 of the electric motor 3, the through hole 44a of the speed reduction mechanism 44, and the through hole 4a of the spool 4, and this transmission rod 36 is journalled 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 fitted into 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.

[0043] A transmission pin 38 is press-fitted and fixed in 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.

[0044] A support rod 49 is coaxially fitted to the outer periphery of the transmission rod 36. This support rod 49 rotates in synchronous with the drive-side friction plate 34, and generates an equivalent 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.

[0045] 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 a contact portion with the opposing cam mating member 43. This slope is adapted 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 movement of the cam mating member 43 in the axial direction is directly the amount of movement of the drag force adjustment knob 35. As described above, the drag force adjustment knob 35 is connected to the spool 4 via the transmission rod 36, the transmission pin 38, and the elastic member 39. Therefore, by rotating the lever member 41, the spool 4 moves in the axial direction. As a result, 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.

[0046] In this embodiment, the driving side friction plate 34 rotates integrally with the output member 45 of the reduction mechanism 44, so that the rotation 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 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 constituting the other units, and improves reliability. In addition, the optimization of the configuration can also reduce the size of the entire reel.

[0047] As described above, according to this embodiment, since the speed reduction mechanism 44 constitutes a cycloid reducer, a high speed reduction ratio can be ensured by the speed reduction mechanism 44 alone. In other words, since there is no need to install multiple speed reduction mechanisms to obtain a high speed reduction ratio as in the case of using a planetary gear mechanism as the speed reduction mechanism, a high speed reduction ratio can be obtained without increasing the size of the entire electric reel 10 as the electric winding device.

[0048] Furthermore, by using a cycloid reducer as the reduction mechanism 44 in this way, even when a hollow electric motor 3 is used as in this embodiment, the overall size of the reduction mechanism 44 does not need to be increased. That is, since the cycloid reducer does not cause the above-mentioned problem of an increase in gear diameter due to an increase in the diameter of the hollow motor shaft as occurs with a planetary gear mechanism, it is possible to reduce the overall size of the electric reel 10 while maintaining a high reduction ratio, even when the electric motor 3 is hollow.

[0049] In this embodiment, a transmission rod 36 that transmits a pressing force for generating a drag force and a support rod 49 that receives the pressing force are inserted and disposed 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 configured to form a transmission path that transmits a 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 purpose, a connecting element that connects the spool 4 and the lever member 41, specifically the transmission rod 36 and the support rod 49 that constitute the drag mechanism, are inserted and disposed in the through hole 9 as components that constitute the electric reel 10. This makes it possible to avoid disconnection of the connection path due to the electric motor 3, thereby realizing miniaturization of the entire electric reel 10 and optimization of its functions.

[0050] 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 scope 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. In addition, in the above-described embodiments, the pulling member is a fishing line, but if the electric winding device constitutes a winch or the like, the pulling member may be a metal wire or the like. In addition, 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 scope of the present invention. [Explanation of symbols]

[0051] 10 Electric reel (electric winding device) 3. Electric motor 3d rotor 4 Spool (rotating body) 4a through hole 9 Through holes 34 Friction plate 36 Transmission Rod 41 Lever member 44 Reduction mechanism 44a through hole 45 Output member

Claims

[Claim 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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