JP2009220953A - Chain block with auxiliary motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chain block with an auxiliary motor, capable of assisting rotation of a handwheel according to the magnitude of a load generated on the handwheel using a mechanical torque transmission mechanism. <P>SOLUTION: When a load is generated on the handwheel 17, a difference in rotation angle between an outside rotation axis 21 and an inside rotation axis 23 is generated to move a taper wheel 25. Therefore, a ratchet pawl 30 is engaged with a ratchet wheel 31 rotated by an auxiliary motor 32 to convey torque. When the load generated on the handwheel 17 is reduced and the difference in rotation angle between the outside rotation axis 21 and the inside rotation axis 23 disappears, the taper wheel 25 returns to the original position and the ratchet pawl 30 is disengaged with the ratchet wheel 31. This causes torque by the auxiliary motor 32 not to be conveyed. Accordingly, rotation of the handwheel 17 can be assisted according to the magnitude of the load generated on the hand wheel 17. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a chain block with an auxiliary motor provided with an auxiliary motor for reducing a load when lifting a load in a chain block for lifting and lowering the load.

  Conventionally, when moving loads that are difficult to lift directly by manpower at factories and construction sites, the rotation of the handwheel is transmitted to the load wheel via the speed reducer and the load chain hung on the load wheel. A chain block that lifts and lowers the load was used. Especially in the case of heavy loads, it may be difficult to lift the chain block by simply operating it manually. With an auxiliary motor equipped with a removable auxiliary motor that assists the rotation of the chain block handwheel. A chain block has been proposed (see, for example, Patent Document 1).

  In such a normal chain block with an auxiliary motor, like the chain block 1 shown in FIG. 1, a load lifting hook 11, a load chain 12, a load wheel 13, a mounting hook 14, a speed reducer 15, a hand chain 16, a hand wheel 17 is provided.

  The chain block 1 is suspended from a ceiling or a beam by a mounting hook 14. The luggage to be moved is attached to the luggage lifting hook 11 directly or with a rope or the like. The handwheel 16 is pulled to rotate the hand wheel 17, and the load wheel 13 is rotated via the speed reducer 15. Depending on the direction of rotation of the load wheel 13, the load chain 12 is wound or lowered, and the load lifting hook 11 is raised or lowered to move the load.

  In particular, when lifting a heavy load, the drive shaft 4 of the auxiliary motor 3 is inserted into the mounting hole 2 provided in the hand wheel 17. As the hand chain 16 is pulled, the auxiliary motor 3 is driven in the same rotational direction as the hand wheel 17, thereby reducing the load generated on the hand wheel 17.

In such a chain block with an auxiliary motor, the weight of the load is relatively light, and when it can be raised at high speed only by human power, or when it is unloaded under no load, the connection with the auxiliary motor is released. In order to prevent an unnecessary load from being generated, the auxiliary motor and the handwheel are connected and disconnected by a rotational force transmission mechanism such as an electromagnetic clutch.
Japanese Patent Laid-Open No. 2004-026498

  However, since the electromagnetic clutch has a large mass, there is a problem of increasing the weight of the chain block itself. In addition, the operation timing of the electromagnetic clutch is difficult, and there is a problem such as wear of the contact surface. Furthermore, the electromagnetic clutch is an expensive part, which has been a factor in increasing the product price.

  The present invention has been made for such a problem, and is inexpensive, easy to set, and has a highly durable mechanical rotational force transmission mechanism. An object of the present invention is to provide a chain block with an auxiliary motor that assists in rotating the wheel.

  In the chain block with an auxiliary motor according to the present invention, in order to achieve the above-mentioned object, the load wheel attached to the load to be moved is wound around the load wheel, and the handwheel is wound around the load wheel, and the load wheel is rotated. A hand wheel that rotates the outer wheel, an outer rotating shaft attached to the hand wheel, and an inner rotating shaft that is rotatably provided with respect to the outer rotating shaft so as to transmit its rotation to the load wheel. An inner rotating shaft, a compression spring attached between the outer rotating shaft and the inner rotating shaft so as to rotate the outer rotating shaft and the inner rotating shaft in opposite directions, and a cylindrical shape A cylindrical cam in which one end is fixed to the center of the inner rotating shaft and a guide groove inclined with respect to the axial direction of the cylindrical shape is formed on the outer peripheral surface of the cylindrical shape. A taper wheel is formed on the outer rotation shaft, and the taper wheel is movable in the axial direction. A guide pin to be attached and a cam follower that moves in contact with the tapered surface are attached to one end, and engages with the engaging groove of the ratchet wheel having an engaging groove formed in parallel on the outer peripheral surface in the axial direction. A link lever with a ratchet pawl provided on the other end, a link lever plate with the other end of the cylindrical cam fixed to the center of rotation, and supporting the link lever, and an auxiliary motor for rotating the ratchet wheel And a torque detector that detects a load generated on the outer rotary shaft by detecting a movement amount of the taper wheel in the guide pin shaft direction. A mechanism is characterized control means for controlling the rotational force of the auxiliary motor according to the magnitude of the detected load, further comprising a by the torque detection mechanism.

  Further, in the present invention according to the above invention, the torque detection mechanism includes a lever portion that is fitted to the outer peripheral portion of the taper wheel and moves together with the taper wheel, and a slide resistance whose resistance value changes according to the position of the lever portion. It is characterized by that.

  Furthermore, the present invention is the above invention, wherein the cylindrical cam is inserted into the cam mounting hole formed at the center of the taper wheel so that the cam guide pin fits into the guide groove of the cylindrical cam. When a difference in rotation angle occurs between the outer rotation shaft and the inner rotation shaft, and the cylindrical cam rotates with respect to the outer rotation shaft, the cam guide pin moves along the guide groove, thereby the taper wheel. Moves along the axial direction of the guide pin provided on the outer rotating shaft.

  Further, the present invention is the above invention, wherein the cam follower moves along the taper surface of the taper wheel by moving the taper wheel along the axial direction of the guide pin provided on the outer rotation shaft, and the cam follower is By moving, the link lever moves, and the ratchet pawl engages with or disengages from the engagement groove of the ratchet wheel.

  According to the present invention, the outer rotating shaft is fixed to the hand wheel that rotates the load wheel around which the load chain attached to the load to be moved is wound. An inner rotating shaft is rotatably provided inside the outer rotating shaft via a compression spring, and the inner rotating shaft is connected to a load wheel via a speed reducer.

  The inner rotating shaft has one end of the cylindrical cam fixed to the center of rotation of the surface opposite to the surface connected to the load wheel. A guide groove inclined with respect to the axial direction of the cylindrical shape is formed on the cylindrical outer peripheral surface of the cylindrical cam. The cylindrical cam is inserted into a cam mounting hole formed at the rotation center of a taper wheel having a tapered surface formed on one surface. A cam guide pin is provided inside the cam mounting hole, and the cam guide pin is fitted into the guide groove of the cylindrical cam. The taper foil is attached to a guide pin provided on the outer rotation shaft so as to be movable in the axial direction of the guide pin.

  As a result, when the load generated on the load wheel when the handwheel is rotated is larger than the force that rotates the outer and inner rotating shafts in the opposite directions by the compression spring, the inner rotating shaft rotates by the remaining outer rotating shaft. Thus, a difference in rotation angle occurs between the outer rotating shaft and the inner rotating shaft. When there is a difference in rotation angle, the taper wheel attached to the outer rotation shaft so as to be movable in the axial direction of the guide pin rotates with the outer rotation shaft, and the cam guide pin is placed on the cylindrical outer peripheral surface of the cylindrical cam. By moving along the formed guide groove, the taper foil moves along the axial direction of the guide pin.

  The amount of movement of the moving taper foil is detected as a change in resistance value by a torque detection mechanism equipped with a lever part that fits on the outer periphery of the taper wheel and moves with the taper wheel, and a slide resistance whose resistance value changes according to the position of the lever part. Then, the change in the magnitude of the torque is calculated by the control means.

  A link lever plate is attached to the other end of the cylindrical cam inserted into the taper wheel on the opposite side to the side on which the inner rotation shaft is attached. The link lever plate is rotatably supported at its outer periphery by a bearing or the like, and the link lever is supported on the rotation surface of the link lever plate. A cam follower that moves in contact with the tapered surface of the taper wheel is attached to one end of the link lever, and a ratchet pawl that is pressed in one direction by a spring attached to the link lever plate is attached to the other end. .

  The cam follower moves along the tapered surface as the taper wheel moves. Accordingly, the ratchet pawl attached to the other end of the link lever also moves. Accordingly, the ratchet pawl moves in accordance with the movement of the taper wheel, and engages with or disengages from the engagement groove of the ratchet wheel provided with the engagement groove formed in the outer peripheral surface in parallel in the axial direction. The ratchet wheel is connected to the auxiliary motor, and rotates according to the torque detected by the torque detection mechanism.

  As a result, the taper wheel moves in accordance with the load generated in the hand wheel, and the ratchet pawl moves to engage with the ratchet wheel rotated by the auxiliary motor to transmit the rotational force. When the load on the handwheel is reduced and the difference in rotation angle between the outer and inner rotary shafts disappears, the taper wheel returns to its original position, and the ratchet pawls disengage from the engagement grooves of the ratchet wheel and the rotational force of the auxiliary motor is applied. It will not be transmitted. Therefore, there is no unnecessary load on the handwheel, and it is possible to lift the load quickly and with little force, and it is inexpensive and easy to set up without using expensive parts such as an electromagnetic clutch. Rotation assistance can be performed according to the magnitude of the load generated on the hand foil due to durability.

  As described above, according to the chain block with an auxiliary motor of the present invention, it is inexpensive and easy to set using a cylindrical cam, and a highly durable mechanical rotational force transmission mechanism reduces the load generated on the handwheel. It becomes possible to assist the rotation of the hand wheel according to the size.

  Hereinafter, preferred embodiments of a chain block with an auxiliary motor according to the present invention will be described in detail with reference to the accompanying drawings. First, the configuration of the chain block with an auxiliary motor according to the present invention will be described. FIG. 2 is an external perspective view of a chain block with an auxiliary motor according to the present invention, and FIG. 3 is a perspective view showing a component structure.

  As shown in FIG. 2, the chain block 10 includes a load lifting hook 11, a load chain 12, a load wheel 13, a mounting hook 14, a speed reducer 15, a hand chain 16, and a hand wheel 17. A rotational force transmission mechanism 20 is provided inside the cover 18.

  As shown in FIG. 3, the rotational force transmission mechanism 20 includes an outer rotation shaft 21, guide pins 22, 22, an inner rotation shaft 23, a cylindrical cam 24, a taper wheel 25, a torque detection mechanism 26, a link lever 27, a cam follower 28, and a link. The lever plate 29, ratchet pawl 30, ratchet wheel 31, auxiliary motor 32, and control means (not shown) are configured.

  The outer rotating shaft 21 has a disk shape including a hole in which the inner rotating shaft 23 is rotatably attached at the center and a spring groove 21A for attaching a compression spring (not shown), and a guide pin 22 on one surface, 22 is provided. The surface of the outer rotating shaft 21 opposite to the surface on which the guide pins 22, 22 are provided is fixed to the handwheel 17, and the outer rotating shaft 21 rotates with the handwheel 17 by pulling the hand chain 16.

  The inner rotating shaft 23 has a disc shape, and is connected to the load wheel 13 via one speed reducer 15 on one surface, and one end of a cylindrical cam 24 is attached to the other surface. The inner rotating shaft 23 is rotatably attached to the central portion of the outer rotating shaft 21, and a rotational force is generated so as to rotate in the reverse direction with respect to the outer rotating shaft 21 by a compression spring (not shown) attached to the spring groove 21A. ing.

  As shown in FIG. 4, the cylindrical cam 24 has a cylindrical shape, and guide grooves 33, 33 that are inclined with respect to the axial direction of the cylindrical shape are formed on the outer peripheral surface of the cylindrical shape. The cylindrical cam 24 is inserted into a cam mounting hole 25B formed at the center of rotation of the taper wheel 25 having a disk shape with a tapered surface 25A formed on one surface. A cam guide pin (not shown) is provided inside the cam mounting hole 25 </ b> B, and the cam guide pin fits with the guide grooves 33 and 33 of the cylindrical cam 24.

  The taper wheel 25 is attached to guide pins 22 and 22 provided on the outer rotating shaft 21 so as to be movable in the axial direction of the guide pins 22 and 22.

  Accordingly, when the load generated on the load wheel 13 when the hand wheel 17 is rotated is larger than the rotational force that rotates the outer rotating shaft 21 and the inner rotating shaft 23 in the opposite directions by the compression spring, the inner rotating shaft 23 is Only the remaining outer rotating shaft 21 is rotated, and a difference in rotation angle occurs between the outer rotating shaft 21 and the inner rotating shaft 23. When a difference occurs in the rotation angle, the taper wheel 25 attached to the outer rotation shaft 21 so as to be movable in the axial direction of the guide pins 22 and 22 rotates together with the outer rotation shaft 21, and the cam guide pin becomes the cylindrical cam 24. The taper foil 25 moves along the axial direction of the guide pins 22 and 22 by moving along the guide grooves 33 and 33 formed on the cylindrical outer peripheral surface of the guide pin 22 and 22.

  The torque detection mechanism 26 includes a lever portion 26A that is fitted to the outer peripheral portion of the taper wheel 25 and moves together with the taper wheel 25, and a slide resistor 26B whose resistance value changes according to the position of the lever portion 26A. The torque detection mechanism 26 detects the movement amount of the moving taper wheel 25 as a change in resistance value, sends the detected change in resistance value to the connected control means, and the change in the magnitude of the torque generated in the hand wheel 17 is the control means. Is calculated by

  A link lever plate 29 is attached to the other end of the cylindrical cam 24 inserted into the taper wheel 25 on the opposite side to the side on which the inner rotating shaft 23 is attached. An outer peripheral portion of the link lever plate 29 is rotatably supported by a bearing 34 or the like, and a link lever 27 is supported on the rotation surface of the link lever plate 29.

  A cam follower 28 that moves in contact with the tapered surface 25A of the tapered wheel 25 is attached to one end of the link lever 27, and a ratchet pawl 30 is attached to the other end. A spring (not shown) is attached between the ratchet pawl 30 and the link lever plate 29, and is always in one direction with respect to the ratchet pawl 30 (in this embodiment, the direction toward the center of the link lever plate 29). Pressing to move.

  The cam follower 28 moves along the tapered surface 25A as the taper wheel 25 moves. Accordingly, the ratchet pawl 30 attached to the other end of the link lever 27 also moves. Thereby, the ratchet pawl 30 moves in accordance with the movement of the taper wheel 25, and engages with or engages with the engagement groove of the ratchet wheel 31 provided with the engagement groove formed in the outer peripheral surface in parallel in the axial direction. Get out of the groove.

  The ratchet wheel 31 is connected to the auxiliary motor 32 via the timing belt 35 and is rotated by the auxiliary motor 32 whose rotational force is controlled according to the torque detected by the torque detection mechanism 26.

  As a result, the taper wheel 25 moves according to the load generated in the hand wheel 17, and the ratchet pawl 30 is engaged with the ratchet wheel 31 rotated by the auxiliary motor 32 to transmit the rotational force. When the load generated on the hand wheel 17 is reduced and the difference in rotation angle between the outer rotating shaft 21 and the inner rotating shaft 23 is eliminated, the taper wheel 25 returns to its original position, and the ratchet pawl 30 is disengaged from the engaging groove of the ratchet wheel 31. The rotational force from the auxiliary motor is not transmitted. Therefore, an unnecessary load is not generated on the hand wheel 17, the luggage can be lifted quickly and with a slight force, and it is inexpensive and easy to set up without using expensive parts such as an electromagnetic clutch, Rotation assistance can be performed according to the magnitude of the load generated on the hand wheel 17 with high durability.

  Next, the operation of the chain block with an auxiliary motor according to the present invention will be described. FIG. 5 is a cross-sectional view schematically showing the configuration of the chain block with an auxiliary motor according to the present invention.

  The chain block 10 is suspended from a ceiling, a beam or the like by a mounting hook 14 shown in FIG. The luggage to be moved is attached to the luggage lifting hook 11 directly or with a rope or the like. The handwheel 16 is pulled to rotate the hand wheel 17, and the load wheel 13 is rotated via the speed reducer 15. Depending on the direction of rotation of the load wheel 13, the load chain 12 is wound or lowered, and the load lifting hook 11 is raised or lowered to move the load.

  As shown in FIG. 5, in a state where the handwheel 17 is not rotating, the outer rotating shaft 21 and the inner rotating shaft 23 of the rotational force transmission mechanism 20 are a compression type attached to the spring groove 21 </ b> A of the outer rotating shaft 21. The spring 36 is stationary with the stretched state.

  When pulling the hand chain 16 and rotating the hand wheel 17 in the direction of arrow A and trying to lift the load by the load chain 12 wound around the load wheel 13, the load wheel 13 is subjected to a rotational load by the load and the load wheel Similarly, a rotational load is also applied to the inner rotary shaft 23 connected to 13. At this time, if the rotational load is larger than the spring force acting in the extending direction of the compression spring 36 and the compression spring 36 contracts and only the outer rotation shaft 21 rotates without rotating the inner rotation shaft 23, the inner rotation shaft 23 and A difference in rotation angle occurs with the outer rotation shaft 21.

  When a difference in rotation angle occurs between the inner rotary shaft 23 and the outer rotary shaft 21, the taper wheel 25 attached so as to be movable in the axial direction of the guide pins 22, 22 rotates together with the outer rotary shaft 21 and rotates. It will rotate with respect to the cylindrical cam 24 by which one end was attached to the inner rotating shaft 23 which is not. As a result, the cam guide pin 37 provided on the taper wheel 25 fitted to the guide grooves 33 and 33 formed on the cylindrical cam 24 moves along the guide grooves 33 and 33.

  Since the guide grooves 33 and 33 are formed to be inclined with respect to the cylindrical axial direction of the cylindrical cam 24, the taper wheel 25 rotates in the axial direction of the guide pins 22 and 22 (this embodiment) as shown in FIG. In the case of (1), it moves in the direction of approaching the hand wheel 17).

  When the taper wheel 25 moves, the cam follower 28 moves in contact with the tapered surface 25 </ b> A of the taper foil 25 by the force of a spring (not shown) attached between the ratchet pawl 30 and the link lever plate 29. As a result, the link lever 27 is lowered and the ratchet pawl 30 is engaged with the engagement groove formed in the ratchet wheel 31.

  Further, the movement of the taper wheel 25 moves the lever portion 26A of the torque detection mechanism 26, and the resistance value of the slide resistance 26B changes. The change amount of the resistance value is sent to the control means 38 connected to the torque detection mechanism 26, and the change in the magnitude of the torque generated in the hand wheel 17 is calculated. The control means 38 controls the rotational force of the auxiliary motor 32 by controlling the electric power sent from the power source 39 according to the calculated magnitude of torque.

  The rotational force of the auxiliary motor 32 is transmitted to the ratchet wheel 31 via the timing belt 35. The ratchet wheel 31 is engaged with the ratchet pawl 30, whereby the link lever plate 29 is rotated by the rotational force of the auxiliary motor 32. Since one end of the cylindrical cam 24 opposite to the side attached to the inner rotary shaft 23 is attached to the center of the link lever plate 29, the inner rotary shaft 23 is also rotated by the link lever plate 29 rotating. It rotates with the rotational force of the auxiliary motor 32.

  When the inner rotating shaft 23 is rotated by the rotational force of the auxiliary motor 32, the rotational load generated on the load wheel 13 connected to the inner rotating shaft 23 via the speed reducer 15 is reduced, and the hand wheel 17 is rotated. The necessary force is reduced.

  When the rotation of the hand wheel 17 is stopped and the rotation of the outer rotating shaft 21 is stopped, the inner rotating shaft 23 and the outer rotating shaft 21 are rotated again to the state shown in FIG. 5 by the spring force of the compression spring 36 and the taper wheel 25 is moved. When the cam follower 28 is pushed by the tapered surface 25A, the ratchet pawls 30 and 30 are moved to disengage from the engagement groove of the ratchet wheel 31, and the transmission of the rotational force of the auxiliary motor 32 is completed.

  When the load is unwound, the load generated on the load wheel 13 is small, and the inner rotary shaft 23 and the outer rotary shaft 21 are rotated by the spring force of the compression spring 36. There is no engagement with the foil 31, and no unnecessary load is generated on the handwheel 17.

  As described above, in the chain block with an auxiliary motor according to the present invention, the taper wheel 25 moves according to the load generated in the hand wheel 17, and the ratchet pawl 30 is engaged with the ratchet wheel 31 rotated by the auxiliary motor 32. Rotational force is transmitted. When the load generated on the hand wheel 17 is reduced and the difference in rotation angle between the outer rotating shaft 21 and the inner rotating shaft 23 is eliminated, the taper wheel 25 returns to its original position, and the ratchet pawl 30 is detached from the ratchet wheel 31 and is driven by the auxiliary motor 32. The rotational force is not transmitted. Therefore, an unnecessary load is not generated on the hand wheel 17, the luggage can be lifted quickly and with a slight force, and it is inexpensive and easy to set up without using expensive parts such as an electromagnetic clutch, Rotation assistance can be performed according to the magnitude of the load generated on the hand wheel 17 with high durability.

The block diagram of a normal chain block with an auxiliary motor. The whole perspective view of the chain block with an auxiliary motor concerning the present invention. The perspective view which showed the structure of the chain block with an auxiliary motor which concerns on this invention. The perspective view which showed the shape of the cylindrical cam. Sectional drawing which showed typically the structure of the chain block with an auxiliary motor which concerns on this invention. Sectional drawing which showed the state which is assisting rotational force.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 10 ... Chain block, 2 ... Mounting hole, 3, 32 ... Auxiliary motor, 4 ... Drive shaft, 11 ... Luggage lifting hook, 12 ... Load chain, 13 ... Road wheel, 14 ... Mounting hook, 15 ... Reduction gear, 16 ... hand chain, 17 ... hand wheel, 18 ... cover, 20 ... rotational force transmission mechanism, 21 ... outer rotating shaft, 21A ... spring groove, 22 ... guide pin, 23 ... inner rotating shaft, 24 ... cylindrical cam, 25 ... Tapered foil, 25A ... tapered portion, 25B ... cam mounting hole, 26 ... torque detection mechanism, 26A ... lever portion, 26B ... slide resistance, 27 ... link lever, 28 ... cam follower, 29 ... link lever plate, 30 ... ratchet pawl, 31 ... Ratchet wheel, 32 ... Auxiliary motor, 33 ... Guide groove, 34 ... Bearing, 35 ... Timing belt, 36 ... Compression bar , 37 ... cam guide pins, 38 ... control unit, 39 ... power supply

Claims (4)

A load wheel wrapped with a load chain attached to the luggage to be moved;
A handwheel that rotates by pulling a wound hand chain and rotates the load foil;
An outer rotating shaft attached to the handwheel;
An inner rotating shaft provided inside the outer rotating shaft so as to be rotatable with respect to the outer rotating shaft and configured to transmit the rotation of the load wheel to the inner rotating shaft;
A compression spring attached between the outer rotating shaft and the inner rotating shaft so as to rotate the outer rotating shaft and the inner rotating shaft in opposite directions;
A cylindrical cam having a cylindrical shape, one end fixed to the center of the inner rotation shaft, and a guide groove inclined on the cylindrical axial direction formed on the cylindrical outer peripheral surface;
A taper wheel in which a taper surface is formed on one surface, and a cam mounting hole provided with a cam guide pin fitted to the guide groove is formed at the rotation center;
A guide pin provided on the outer rotating shaft and attached so that the taper foil is movable in the axial direction;
A cam follower that moves in contact with the tapered surface is attached to one end, and a pawl that engages with the engaging groove of the ratchet wheel that includes an engaging groove formed in parallel on the outer peripheral surface in the axial direction. A link lever with a ratchet pawl attached to the other end;
A link lever plate that supports the link lever, the other end of the cylindrical cam being fixed at the center of rotation;
An auxiliary motor for rotating the ratchet wheel;
A torque detection mechanism for detecting a load generated on the outer rotation shaft by detecting a movement amount of the taper wheel in the guide pin axis direction;
And a control means for controlling the rotational force of the auxiliary motor according to the magnitude of the load detected by the torque detection mechanism.   The torque detection mechanism includes a lever portion that is fitted to the outer peripheral portion of the taper wheel and moves together with the taper wheel, and a slide resistance whose resistance value changes according to the position of the lever portion. Chain block with auxiliary motor as described.   The cylindrical cam is inserted into the cam mounting hole formed at the center of the taper wheel so that the cam guide pin fits into the guide groove of the cylindrical cam, and the outer rotating shaft and the inner rotating shaft When the cylindrical cam rotates with respect to the outer rotation shaft due to a difference in rotation angle, the taper wheel is provided on the outer rotation shaft by the cam guide pin moving along the guide groove. The chain block with an auxiliary motor according to claim 1 or 2, wherein the chain block moves along the axial direction of the guide pin.   The cam follower moves along the taper surface of the taper wheel when the taper wheel moves along the axial direction of the guide pin provided on the outer rotating shaft, and the link lever moves when the cam follower moves. 4. The chain block with an auxiliary motor according to claim 1, wherein the ratchet pawl is engaged with or disengaged from the engagement groove of the ratchet wheel. 5. .

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