JP2005351336A - Non-contact load-sensing type automatic transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact load-sensing type automatic transmission enabling the stable operation, a reduction in size, and an easy increase in the number of stages. <P>SOLUTION: A first yoke 12 and a second yoke 13 are fixed on both sides of a first permanent magnet 11 through a clearance 16, and a third yoke 20 is disposed through the clearance. A second permanent magnet 25 on the inner peripheral surface of a cylindrical magnet fixing member 49 is detachably disposed in the space 16 between the yokes. When the second permanent magnet 25 is inserted into the clearance 16, the magnetic circuit of the first permanent magnet 11 is passed through the second permanent magnet 25 side and the third yoke 20 is brought into a free state. When the second permanent magnet 25 is released from the clearance 16, the magnetic circuit of the first permanent magnet is passed through the third yoke 20, and both permanent magnets are magnetically joined to each other. The magnetic clutches 10 are disposed in three rows parallel with each other, and the third yoke in each row is fixed to the internal gear outer peripheral surface of a planetary gear installed at the center thereof. The internal gear in any row is fixed by the magnetic clutch, and an output shaft 75 is driven at the deceleration of the operating planetary gear. According to a load, a spring 44 is extended/retracted to select the magnetic clutch in operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a load-sensitive automatic transmission that automatically shifts in response to a load, and more particularly to a non-contact type load-sensitive that can perform load sensitivity and shift without contact using a magnet. The present invention relates to a type automatic transmission.

  In many mechanical systems, the nature of the load varies depending on the situation, so it is necessary to drive both a high speed low torque load and a low speed high torque load. On the other hand, in general, a transmission is inserted between the actuator and the load, and an optimal reduction ratio is selected according to the load state. Even if the load state fluctuates, the actuator such as a motor is always in a highly efficient condition. The drive system is configured so that it can be used. As a result, it is possible to drive a fluctuating load with high efficiency and safety using a low-power, small-sized and lightweight actuator having a minimum necessary output power as compared with the case where no transmission is used.

  However, conventional transmissions developed for automobiles and industrial machines require auxiliary equipment such as auxiliary actuators, sensors, electronic circuits, and power supplies in order to perform a shifting operation. For this reason, the transmission becomes larger and has a complicated configuration, and the current technology cannot easily realize the transmission in a small and medium-sized mechanical system such as robotics and mechatronics equipment. One way to achieve this is to provide the transmission itself with a function to change the reduction ratio in response to the load, and configure a load-sensitive automatic transmission that can be operated independently without the need for external equipment. It is to be.

In order to solve such problems, the present inventors first use a switching mechanism using a permanent magnet and a mechanical clutch, and the transmission itself automatically switches the reduction ratio in response to the load torque. A load-sensitive automatic transmission that realizes the function has been proposed (Patent Document 1). With this technology, a load-sensitive automatic transmission having the following characteristics could be constructed.
1. No external accessories are required and it is compact and lightweight, and the configuration can be simplified.
2. There is little mechanical loss inside the transmission (efficiency 90% or more).
3. Unlike transmissions using centrifugal clutches, it can also be applied to low-speed actuators (such as human power).
4). No special parts or processing are required.
5). The same operation is possible in both forward and reverse directions.
6). If necessary, the switching load torque during forward / reverse rotation can be set to different values.
7). The input shaft can be arranged on the same axis.

In the above technique proposed by the present inventors, a mechanical clutch is used. Therefore, the following problems occur.
1. A clutch plate or the like is required, and the structure becomes complicated and the size increases accordingly.
2. Wear occurs in the clutch part.
3. Maintenance management regarding the clutch clearance is required.
4). Shift shock and noise are likely to occur when the clutch is engaged and disengaged.
5). Since the clutch is difficult to slip even when overloaded, the mechanism and actuator may be overloaded.

In order to solve such problems, the present inventor has filed a patent application as Japanese Patent Application No. 2003-144826. The invention is as shown in FIG. 16, and the inner yoke 94 fixed to the inner disk 95 connected to the high speed side of the speed reducer 81 and the outer yoke 92 fixed to the outer ring 93 connected to the low speed side are shown. The permanent magnets 97 with the intermediate yoke 98 fixed to the intermediate disk 96 are arranged so as to face each other while being shifted in the axial direction. Placing the magnet M _OA and M _{OA 'in} the intermediate disc output disc 100 which is connected to the counter to the output shaft to the magnet M ₁ fixed to 96. Magnet M ₁ is arranged so as to be positioned between the magnets M _OA and M _{OA ',} resulting forces repelling With that time the pole facing the same in polarity, the intermediate yoke 98 by pressing the intermediate disc 96 Is opposed to the inner yoke 94 of the high speed stage and rotates integrally. When the load increases, the magnet M ₁ is rotated to a position opposite to the magnet M _OA, the magnet M ₁ is attracted to the magnet M _OA, inner yoke rotates integrally so as to face the outer yoke 92 of the low speed stage. At this time, the adjacent magnet _MOB generates a returning force.
JP 2002-31165 A Japanese Patent Application No. 2003-144826

  The non-contact type load sensitive automatic transmission as described above can realize both the transmission power transmission by the transmission mechanism and the transmission operation by the rotation-thrust conversion mechanism by a non-contact mechanism using magnetism. As a result, since the mechanical contact inside the transmission is limited to the bearing portion only, the clutch friction material becomes unnecessary, the wear problem can be solved, and maintenance management of the clutch gap is unnecessary, It is possible to reduce the speed change shock and noise by the spring effect of magnetic coupling, and to make a non-contact type load sensitive automatic transmission that can protect the actuator and mechanism by slipping the magnetic clutch at overload. . In addition, the magnet and yoke are arranged on the circumference and the opposing magnetic clutch is used, so it is possible to use general yoke materials compared to those using hysteresis magnetic coupling, and the size and arrangement of the magnet By increasing the number, it is possible to easily increase the transmission torque.

  The present inventor further allows the above-described non-contact type load-sensitive automatic transmission to perform more stable operation, reduce the size, and easily configure a multi-stage automatic transmission. The present invention has been improved as much as possible to arrive at the present invention.

  Therefore, the present invention uses a magnetic clutch without using a mechanical clutch, and further allows the magnetic clutch to be switched magnetically in accordance with the load in accordance with the load. The main object of the present invention is to provide a non-contact type load-sensitive automatic transmission which is a transmission, can be stably operated, can be reduced in size, and can easily constitute a multi-stage automatic transmission. Objective.

  In order to solve the above-described problem, a non-contact type load-sensitive automatic transmission according to the present invention fixes a first permanent magnet having N poles and S poles arranged on the side of each yoke between the first yoke and the second yoke. The magnet fixing yoke member, the third yoke disposed with a gap between the end portions of the first yoke and the second yoke, and the gap between the first yoke and the other end portion of the second yoke. A magnetic clutch comprising a permanent magnet and a second permanent magnet that is detachably arranged with the polarity reversed is arranged adjacent to each other in a plurality of rows, and the adjacent magnet fixing yoke members are connected and integrated by a connecting member. A magnet fixing yoke member row is formed, and the second permanent magnets in each row are fixed in a plurality of rows at different positions in the circumferential direction on the inner peripheral surface of the cylindrical magnet fixing member, and the magnet fixing yoke member A spring is provided between the row and the cylindrical magnet fixing member. Due to the relative rotation of the magnet fixed yoke member row and the cylindrical magnet fixed member, the second permanent magnets in the plurality of rows of arbitrary magnetic clutches are separated from between the first yoke and the second yoke, and the third yoke and magnets of the magnetic clutch are removed. The fixed yoke member is magnetically coupled, and a second permanent magnet in another row of the magnetic clutch is inserted between the first yoke and the second yoke so that the magnetic coupling can be released, and the third yoke of each row is configured. An input disk of the magnetically coupled magnetic clutch comprising a plurality of input shafts for driving the input disk with the members fixed at different speeds by an external drive device, and an output shaft connected to the cylindrical magnet fixing member. The force of the input shaft connected to the output shaft is transmitted to the output shaft via the magnet fixing yoke member row and the cylindrical magnet fixing member, and the spring is expanded and contracted according to the load driven by the output shaft. The magnet fixing yoke member row and the cylindrical magnet fixing member are rotated relative to each other, the other magnetic clutch is magnetically coupled, and the output shaft differs depending on the input shaft connected to the input disk of the other magnetic clutch. It is characterized by being driven at a speed.

  In another non-contact type load-sensitive automatic transmission according to the present invention, a magnet fixing yoke in which a first permanent magnet having an N pole and an S pole arranged on each yoke side is fixed between a first yoke and a second yoke. A member, a third yoke disposed with a gap at the ends of the first yoke and the second yoke, and the first permanent magnet in a gap between the first yoke and the other end of the second yoke. And a second permanent magnet, which is detachably arranged with the polarity reversed, are arranged adjacent to each other in a plurality of rows, and the adjacent magnet fixing yoke members are connected by a connecting member to be integrated. A member row is formed, and the second permanent magnets in each row are fixed at different positions in the circumferential direction on the inner peripheral surface of the cylindrical magnet fixing member, and the magnet fixing yoke member row and the cylindrical magnet are fixed. A magnet is provided between the fixed members, and the magnet fixed yoke member And the cylindrical magnet fixing member are rotated relative to each other so that the second permanent magnets in any magnetic clutch in a plurality of rows are separated from between the first yoke and the second yoke, and the third yoke and the magnet fixing yoke member of the magnetic clutch are magnetized. In addition, the second permanent magnets in the magnetic clutches of the other rows are inserted between the first yoke and the second yoke so that the magnetic coupling can be released, and the magnetic clutches are reduced corresponding to the magnetic clutches provided in the plurality of rows. A plurality of planetary gear mechanisms with different speeds are arranged side by side, the third yoke of the magnetic clutch is fixed to the outer periphery of the internal gear of each planetary gear mechanism, and the sun gears of each planetary gear mechanism are driven on the same axis and adjacent to each other. The support shaft of the planetary gear is connected, and the output shaft is driven by the carrier of the planetary gear, and the internal gear of the corresponding planetary gear mechanism is magnetized by the magnetically coupled arbitrary magnetic clutch. And the output shaft is driven by rotation about the input shaft of the internal gear, the spring is expanded and contracted according to the load driven by the output shaft, and the fixed magnet fixing yoke member is The cylindrical magnet fixing member is relatively rotated, the other magnetic clutch is magnetically coupled, the planetary gear mechanism internal gear corresponding to the other magnetic clutch is magnetically fixed, and the same input shaft is used for output. It is characterized by driving the shaft at different speeds.

  In another non-contact type load sensitive automatic transmission according to the present invention, a plurality of third yoke members of each row are provided on an outer periphery of an input disk, and a magnetic clutch corresponding to the plurality of third yokes is provided. It is characterized by providing a plurality.

In the present invention, a magnetic clutch is used without using a mechanical clutch, and the switching operation of the clutch can be performed according to the load without using an auxiliary device or an auxiliary device such as an electronic circuit. The automatic transmission can be a small, light and simple structure. Further, by using a non-contact magnetic clutch, it is possible to provide a transmission switching mechanism that is maintenance-free, has little shift shock, is low in noise, and can be protected from overload, and installation work is facilitated.
Furthermore, since the automatic transmission according to the present invention is a load-sensitive transmission,
1. Auxiliary equipment such as auxiliary power, electronic circuit, and power supply are not required.
2. Compact, lightweight and simple configuration.
3. Easy installation.
There is an effect.

Moreover, since the load sensitive transmission according to the present invention is a non-contact type,
1. Eliminates friction material wear and clearance management issues.
2. High efficiency due to reduced loss due to mechanical contact and friction.
3. Reduction of shift shock and noise by the spring effect of magnetic coupling.
4). When overloaded, the magnetic clutch begins to slip, protecting the power source.
There is an effect.

Furthermore, in the present invention,
By extending to the 1.3-speed gear shift, a finer gear shift operation is possible with respect to load fluctuations, and the operating condition of the power source can always be kept near the optimum value. As a result, driving efficiency can be further improved.
2. In the previous invention, the intermediate disk and the output disk have to be relatively rotated and slid in the axial direction along with the speed change operation. In this case, it is difficult to design and manufacture a mechanism that couples the intermediate disk and the output disk while allowing two types of relative motion, and the number of parts is increased. On the other hand, in this application, the speed change operation can be performed only by the rotational motion, so that the simplification of the mechanism and the reduction of the number of parts are achieved and the design and manufacture are facilitated.
3. Although a three-speed transmission has been described here as an example, it can be easily extended to a multi-speed transmission having four or more stages by connecting similar mechanisms.
4). Conversely, a two-stage transmission in which the number of input disks is reduced to two can be configured. In this case, the mechanism of the two-stage transmission can be greatly simplified as compared with the previous invention.

  Further, in the non-contact type load-sensitive automatic transmission according to the second embodiment of the present invention, the entire structure of the front-stage speed reducer, the connecting shaft, and the magnetic clutch is integrated. In terms of size, it is not necessary to connect the front stage reduction gear and the magnetic clutch side by side in the axial direction, and the whole can be shortened in the axial direction by forming an integral structure. Although it becomes larger in the radial direction, this is a rather advantageous structure as a torque transmission machine by the action of torque = radius × force.

  In the case of an N-stage transmission, the multi-coaxial structure does not require an N-fold input shaft, and the overall structure of the transmission is simplified. When increasing the number of stages, a similar mechanism is used in the axial direction. Although it will be expanded, the basic structure remains the same, and there is an advantage that manufacturing is easy. As for the rotating part, the first layer composed of the input shaft and the sun gear, the second layer composed of the output shaft and the carrier, and an internal field gear in which only one is fixed and the other is idle, the rotating part is Because it decreases, the moment of inertia decreases. In addition, the fourth layer, which has a large moment of inertia because it consists of a large number of permanent magnets and yokes, has many effects that it is basically stationary, although it rotates relative to the outermost layer according to the load torque increase / decrease. Play.

  The present invention uses a magnetic clutch without using a mechanical clutch, and further allows the magnetic clutch to be magnetically switched according to the load so that the magnetic clutch can be switched. The first yoke is a non-contact type load-sensitive automatic transmission that can be stably operated and reduced in size and that can easily configure a multi-stage automatic transmission. A magnet fixing yoke member for fixing a first permanent magnet having N poles and S poles arranged on the side of each yoke between the first yoke and the second yoke, and a gap between end portions of the first yoke and the second yoke. A third yoke disposed, and a second permanent magnet that is detachably disposed in the gap between the first yoke and the other end of the second yoke with a polarity opposite to that of the first permanent magnet. Multiple magnetic clutches are placed adjacent to each other. The adjacent magnet fixing yoke members are connected and integrated by a connecting member to form a magnet fixing yoke member row, and the second permanent magnets in each row are arranged circumferentially on the inner peripheral surface of the cylindrical magnet fixing member. A plurality of rows are fixed at different positions, a spring is provided between the magnet fixing yoke member row and the cylindrical magnet fixing member, and any number of rows can be determined by relative rotation of the magnet fixing yoke member row and the cylindrical magnet fixing member. The second permanent magnet in the magnetic clutch is removed from between the first yoke and the second yoke, the third yoke of the magnetic clutch and the magnet fixing yoke member are magnetically coupled, and the second permanent magnet in the magnetic clutch of the other row Is inserted between the first yoke and the second yoke so that the magnetic coupling can be released, and the input disk to which the third yoke member of each row is fixed is driven at different speeds by an external driving device. A plurality of input shafts, and an output shaft connected to the cylindrical magnet fixing member, and the force of the input shaft connected to the input disk of the magnetically coupled magnetic clutch, the magnet fixing yoke member row, The spring is expanded and contracted according to a load transmitted to the output shaft through the cylindrical magnet fixing member and driven by the output shaft, and the magnet fixing yoke member row and the cylindrical magnet fixing member are relatively rotated. The other magnetic clutch is magnetically coupled, and the output shaft is driven at different speeds by the input shaft connected to the input disk of the other magnetic clutch.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the principle of a non-contact magnetic clutch used in the present invention, in which a permanent magnet and a yoke are combined to constitute a magnetic circuit, and torque transmission is coupled / separated by switching the path. .

  As shown in FIG. 1 (a), in the magnet fixed yoke member 10, the first yoke 12 and the first yoke 12 made of a magnetic material are sandwiched between the first permanent magnet 11 in which the N pole and the S pole are arranged as shown. The two yokes 13 are fixed integrally. The first yoke 12 and the second yoke 13 facing each other fix the first permanent magnet 11 below the opposing surface, and the upper part is an opposing gap 16 where the first yoke part 14 and the second yoke part 15 face each other. Is formed.

  A third yoke 20 having a U-shaped cross section made of a magnetic material with a gap is disposed opposite to the lower end surfaces of the lower end 17 of the first yoke 12 and the lower end 18 of the second yoke 13. The opening side of the third yoke 20 faces the first yoke 12 and the second yoke 13 side. In the illustrated embodiment, the first protrusion 21 faces the lower end 17 of the first yoke 12 with a gap therebetween, and the second The protrusion 22 faces the lower end 18 of the second yoke 13 with a gap therebetween. 1A, the magnetism of the first permanent magnet 11 passes from the second yoke 13 to the third yoke 20 through the gap between the lower end 18 and the second protrusion 22 of the third yoke 20. The first yoke 12 passes through the gap between the first protrusion 21 of the third yoke 20 and the lower end 17 of the first yoke 12, and reaches the S pole of the first permanent magnet 11 that is in contact with the first yoke 12. Thus, a coupling magnetic circuit 23 as shown by an arrow in the figure is formed.

  In the state in which such a coupling magnetic circuit 23 is formed, the magnet fixing yoke member 10 and the third yoke 20 are firmly coupled by the magnetic force, and therefore the third yoke 20 is externally connected as described later. The magnet fixing yoke member 10 can also rotate integrally when it is rotated by the input of. At this time, since a large gap exists between the first yoke portion 14 of the first yoke 12 and the second yoke portion 15 of the second yoke 13, a magnetic circuit passing through this portion is not substantially formed.

  On the other hand, in FIG. 1 (a), a second permanent magnet 25 located laterally away from the facing gap 16 between the first yoke portion 14 and the second yoke portion 15 facing each other is shown in the figure. It moves as shown by an arrow so that the first yoke portion 14 and the second yoke portion 15 can enter the facing gap 16 as shown in FIG. At this time, the second permanent magnet 25 is arranged so that the N pole and the S pole are opposite to the left and right sides with respect to the first permanent magnet 11 as shown in the figure, so that in the state shown in FIG. The magnetic field lines from the N pole of the magnet 11 pass through the second yoke 13 as shown by the arrows in the figure, and reach the S pole of the second permanent magnet 25 facing the second yoke portion 15 with a minute gap. . On the other hand, the line of magnetic force from the north pole of the second permanent magnet 25 passes through the first yoke portion 14 facing the north pole with a small gap, as indicated by the arrow in the figure, and below the first yoke 12. To the south pole of the first permanent magnet 11 fixed to the top.

  Since such a magnetic circuit is a magnetic circuit formed directly by two permanent magnets, its force is stronger than the magnetic circuit shown in FIG. 1A, and therefore the magnetic circuit shown in FIG. Circuits are not substantially formed. Therefore, the coupling as shown in (a) between the third yoke 20 and the magnet fixing yoke member 10 is released, and the free state is brought about as shown in (b), so that they can move freely. Using such a mechanism, the second permanent magnet 25 can be moved to any position according to the detected load, whereby a non-contact type load-sensitive automatic transmission can be obtained.

  The present invention uses the principle of a non-contact magnetic clutch based on the principle as described above, and constitutes a non-contact type load-sensitive automatic transmission having various forms by using such a non-contact magnetic clutch. can do. For example, in the example shown in FIG. 2, these non-contact magnetic clutches include three magnetic clutches of a first magnetic clutch 31, a second magnetic clutch 32, and a third magnetic clutch 33, and each magnet fixing yoke. The example of the 3 step | paragraph clutch which connected the side part of the member integrally with the connection ring 26 as a connection member is shown. In each stage of the clutch, a plurality of magnetic clutches as shown in FIG. 1 are provided in a radial manner so that strong coupling can be performed. Further, a plurality of third yokes at each stage are fixed radially on the outer periphery of the input disk.

  In this example, the third yokes can be separately rotated by the input disks 19 provided on the first input shaft 34, the second input shaft 35, and the third input shaft 36 that are arranged concentrically on the same axis. In response to individual inputs from a transmission (not shown), for example, the first input shaft 34 is rotated at a high speed using a reduced speed stage input stage, the second input shaft 35 is set at an intermediate rotational speed using an intermediate speed stage input stage, The input shaft 36 is rotated at a low speed using the high deceleration stage input stage.

  By using the non-contact magnetic clutch as described above by using the input stage as described above, any one of the three-stage simultaneous inputs can be selected in the manner shown in FIGS. Can be driven. That is, in the embodiment shown in FIG. 3, the second permanent magnet is positioned with respect to the magnet fixing yokes of the second magnetic clutch 32 and the third magnetic clutch 33, and the second permanent magnet is positioned with respect to the magnet fixing yoke of the first magnetic clutch 31. 2 The permanent magnet is not positioned. In such an embodiment, a magnetic circuit as shown in FIG. 3B is formed in each magnetic clutch, the third yoke and the magnet fixing yoke member are coupled only in the first magnetic clutch 31, and the others are in a free state. .

  As a result, the magnet fixing yoke member row 29 composed of the three magnet fixing yoke members that are all connected by the third yoke of the first magnetic clutch fixed to the first input shaft 34 rotates integrally. Therefore, when the first input shaft 34 is a shaft that rotates at a high speed at a reduced speed as described above, the entire magnet fixed yoke member row 29 rotates at a high speed. At this time, the third yoke in the second magnetic clutch 32 fixed to the second input shaft 35 rotating at an intermediate rotation speed is not related to the operation of the magnet fixing yoke member rotating at a high speed. It is rotating at an intermediate speed. The same applies to the third input shaft 36 rotating at a low speed.

  In the embodiment shown in FIG. 4, the second permanent magnet is positioned with respect to the magnet fixing yokes of the first magnetic clutch 31 and the third magnetic clutch 33, and the second permanent magnet is positioned with respect to the magnet fixing yoke of the second magnetic clutch 32. The permanent magnet is not positioned. In such an embodiment, a magnetic circuit as shown in FIG. 4B is formed in each magnetic clutch, and only the second magnetic clutch 32 is coupled with the third yoke and the magnet fixing yoke member, and the others are in a free state. .

  Thereby, the magnet fixed yoke member row 29, which is all connected, is integrally rotated by the third yoke of the second magnetic clutch fixed to the second input shaft 35. Therefore, when the second input shaft 35 is a shaft that rotates at a medium speed at an intermediate speed as described above, the entire magnet fixed yoke member row 29 rotates at a medium speed.

  In the embodiment shown in FIG. 5, the second permanent magnet is positioned with respect to each magnet fixing yoke of the first magnetic clutch 31 and the second magnetic clutch 32, and the second permanent magnet is positioned with respect to the magnet fixing yoke of the third magnetic clutch 33. The permanent magnet is not positioned. In such an embodiment, a magnetic circuit as shown in FIG. 5B is formed in each magnetic clutch, and the third yoke and the magnet fixing yoke member are coupled only in the third magnetic clutch 33, and the others are in a free state. .

  As a result, the magnet fixed yoke member row 29, which is all connected, is integrally rotated by the third yoke of the third magnetic clutch fixed to the third input shaft 36. Therefore, when the third input shaft 36 is a shaft that rotates at a low speed at a high speed as described above, the entire magnet fixed yoke member row 29 rotates at a low speed.

  As described above, by selecting the state in which the second permanent magnet is not inserted into any one magnet fixing yoke member in the first magnetic clutch to the third magnetic clutch, in the illustrated embodiment, among the three types of rotational speeds, The output shaft can be rotated by selecting an arbitrary rotational speed. In order to selectively arrange the second permanent magnet in this way, for example, as shown in FIG. A plurality of rows of second permanent magnets are arranged on the inner peripheral surface of the cylindrical magnet fixing member 40 with an appropriate length and an appropriate interval in each row.

  In the example shown in FIG. 6, a first magnet row 37, a second magnet row 38, and a third magnet row 39 are provided on the inner peripheral surface of the cylindrical magnet fixing member 40, and a plurality of radially arranged magnetic clutches are provided. When one of the rows is on a line centered on L1, the second permanent magnets of the second magnet row 38 and the third magnet row 39 are positioned as shown in FIG. Perform the indicated action. Thereafter, when the cylindrical magnet fixing member 40 relatively rotates and is positioned on a line centered on L2 with respect to the magnetic clutch row, the second permanent magnet is positioned as shown in FIG. The operation shown in is performed. Similarly, when the cylindrical magnet fixing member 40 further rotates, the cylindrical magnet fixing member 40 is positioned on a line centered on L3 with respect to the magnetic clutch row, and in this case, the position is as shown in FIG. The operation shown in FIG. 5 is performed. When the cylindrical magnet fixing member 40 rotates in the opposite direction from the above state, the state returns to the state of FIG. 3 through the state of FIG.

  FIG. 7 shows an example of a non-contact type load sensitive automatic transmission 41 obtained by incorporating and integrating various members as described above. As shown in the figure, an output shaft 43 is connected to a cylindrical magnet fixing member 40 by an appropriate number of arms 42, and is provided outside the cylindrical magnet fixing member 40 and the magnet fixing yoke member row 29. The connecting ring 26 is connected by a spring 44, and a predetermined initial tensile force is applied to the spring 44. Thereby, depending on the input shafts of the first input shaft 34, the second input shaft 35, and the third input shaft 36 having different speeds as described above, and according to the insertion state of the second permanent magnet with respect to the yoke in each magnetic clutch. Together with the magnet fixing yoke member row 29 driven at an arbitrary speed, the cylindrical magnet fixing member 40 rotates via the spring 44 and rotates the output shaft 43. In the illustrated embodiment, an example in which a mechanical spring is used is shown. However, as in the previous invention, a magnetic spring utilizing the repulsion when the same pole of the permanent magnet approaches may be used. .

  In the operation of the non-contact type load sensitive automatic transmission 41, for example, as shown in FIG. 7, the second permanent magnet is not inserted into the first magnetic clutch 31, and the second magnetic clutch 32 and the third magnetic clutch 33 are not inserted. When the second permanent magnet is inserted into the first permanent magnet, the high-speed rotation input from the first input shaft at the reduced speed is applied to the magnet fixed yoke member row 29 and the spring 44 when operating in the mode shown in FIG. The cylindrical magnet fixing member 40 is transmitted to the output shaft 43, and the output shaft 43 rotates at high speed. The state of the second permanent magnet in the magnet fixing yoke member row 29 and the cylindrical magnet fixing member 40 in this state is shown in FIG. This state is a state in which a row of magnetic clutches exists on the line L1 in FIG.

  The operation state shown in FIG. 8A can be shown as in FIG. That is, in the non-contact type load sensitive automatic transmission 41 according to the present invention, an input from a driving force source such as a motor corresponds to the first input shaft 34 of FIG. 2 is decelerated using the transmission path of the intermediate deceleration corresponding to the second input shaft 35 of FIG. 2 and the output of the transmission path of the intermediate deceleration. A high-deceleration transmission path corresponding to the third input shaft 36 of FIG. By providing a magnetic clutch as each switching mechanism between each transmission path and a path to one output load, detecting a load torque state of the output load and connecting a magnetic clutch corresponding to the load, It can be driven at an appropriate rotation speed according to the condition. In such a transmission path, the state shown in FIG. 8A is that the magnetic clutch of the transmission path at a reduced speed is connected as shown in FIG. 9, and the output load is rotating at a high speed.

  When the output shaft is driven in the state shown in FIG. 8A, if the driving load increases, the rotation of the cylindrical magnet fixing member 40 is suppressed regardless of the rotation of the input shaft at a predetermined speed. The spring 44 to which a predetermined tensile force has been applied in advance extends. As a result, the magnet fixing yoke member row 29 and the cylindrical magnet fixing member 40 rotate relative to each other, and the second permanent magnet is detached from the second magnetic clutch 32 as shown in FIG. The second permanent magnet is inserted into the three magnetic clutch 33. At this time, the output shaft 43 rotates at a medium speed via the second magnetic clutch 32 by the second input shaft 35 that rotates at a medium speed. In this way, it is possible to automatically decelerate in response to an increase in load.

  When the load further increases during such medium speed rotation, the spring 44 extends as described above, and the magnet fixing yoke member row 29 and the cylindrical magnet fixing member 40 further rotate relative to each other as shown in FIG. Then, as shown in FIG. 8C, the second permanent magnet of the third magnetic clutch 33 is detached, and the second permanent magnets are inserted into the first magnetic clutch 31 and the second magnetic clutch 32. At this time, the output shaft 43 rotates at a low speed via the third magnetic clutch 33 by the third input shaft 36 that rotates at a low speed. In this way, the load can be automatically driven at an appropriate rotational speed with respect to three load sizes.

  When the load torque further increases from the high deceleration state, further relative rotation of the magnet fixing yoke member row 29 and the cylindrical magnet fixing member 40 is limited by a mechanical stopper. Thereafter, when the load gradually decreases, the state returns to the original state shown in FIG. Further, the present transmission configured as described above can operate in the same manner with respect to rotation in the reverse direction to that described above, and thus can be operated with respect to rotation in both forward and reverse directions. .

  In the embodiment as described above, automatic three-speed gear shifting can be easily performed, finer gear shifting operation is possible with respect to load fluctuations, and the operating condition of the power source is always close to the optimum value. Can keep. As a result, driving efficiency can be further improved. In the previous invention by the present inventor, the intermediate disk and the output disk need to relatively rotate and slide in the axial direction along with the speed change operation, and two types of relative movement are allowed. However, it was difficult to design and manufacture a mechanism for connecting the intermediate disk and the output disk, and also caused an increase in the number of parts. It is possible to greatly simplify the mechanism and reduce the number of parts while facilitating the design and manufacture. In the above embodiment, a three-stage transmission is described as an example. However, by connecting the same mechanism, it can be easily expanded to a four-stage or more multi-stage transmission.

  Conversely, a two-stage transmission in which the number of input disks is reduced to two can be configured. Even in this case, the mechanism of the two-stage transmission can be greatly simplified as compared with the previous invention. When such a two-stage transmission is used, the effect shown in FIG. 10 is produced as compared with the case where this is not used. That is, (a) and (b) in FIG. 10 show the torque (a) with respect to the rotational speed and the power (b) with respect to the rotational speed when the transmission is not used, and (c) and (d) in FIG. A torque (c) with respect to the rotational speed and a power (d) with respect to the rotational speed when a two-stage transmission is used are shown. As can be seen from the figure, when the transmission is not used, when the load is used in the state of high speed and low torque and in the state of low speed and high torque as shown in (a), the drive source for driving the load is (b) As shown in FIG. 2, a driving device having a maximum output Pa is used and each is used with an output of Pi, and therefore, a driving source that generates an extra power of Pe is required. On the other hand, when a two-speed transmission is used, as shown in (d), when setting the operation so as to obtain a predetermined torque at each of the high speed reduction stage and the reduction speed stage as shown in (c), It is only necessary to drive this load with a driving device that can obtain the maximum output at each operation set point, so that the load can be driven with a small driving device, and an inexpensive and small driving device can be used. Understand. When a transmission having more stages is used, finer adjustment is possible.

  In the above-described embodiment, the input to the non-contact type load-sensitive automatic transmission according to the present invention is different from the output of the drive device by using a pre-stage reducer as shown in FIG. An example is shown in which a front stage speed reducer is provided in addition to the transmission when shifting to one rotational speed and inputting it. For example, as shown in FIG. 15, this front stage speed reducer is installed inside a non-contact type load-sensitive automatic transmission. It can also be incorporated.

The embodiment shown in FIG. 15 shows an example in which three rows of planetary gear mechanisms are connected. As is well known, the planetary gear mechanism is a device using planetary gears as shown in FIG. 11, and five are shown in the figure connected by a sun gear 52 and a carrier 53 in order from the inside to the outside. It is composed of three elements: a planetary gear 54 and an internal gear 55. Between these rotational speeds,
ω _carrier = ω _{sun gear} / α + ω _{internal gear} (α-1) / α (α> 1)
There is a relationship that imposes one constraint on these three variables. For example, as shown in FIG. 12A, a general planetary gear is used as a speed reducer in the form of sun gear: input, internal gear: input (fixed), and carrier: output.

As another form, as shown in FIG. 12B, the sun gear: input, the carrier: input, and the internal gear: output can be used. That is, the planetary gear can use any two elements as input and the remaining one element as output. In that case,
ω _{internal gear} = −ω _{sun gear} / (α−1) + ω _carrier α / (α−1)
It becomes the relationship.

  The basic configuration is the same in the case of the above-mentioned three-speed shift or more than that, and a plurality of planetary gears (reduced speed / medium speed / high speed) with different reduction ratios are arranged in the axial direction and their suns A gear is connected coaxially to be an input shaft, and a carrier is an output shaft. Further, the internal gears of the planetary gears are not interconnected and can freely rotate at different speeds. Here, the reduction ratio can be switched by fixing only one of the internal gears using the magnetic clutch and causing the other to idle. FIG. 13 shows a summary of this relationship, and FIG. 14 shows an example in which the reduction speed operation and the medium reduction operation are performed by switching any of the planetary gears between fixed and idle rotation. The high deceleration operation is performed in the same manner.

  In order to perform the operation as described above, in this embodiment, a planetary gear train built-in non-contact type load-sensitive automatic transmission 60 as shown in FIG. 15 is used. That is, the first magnetic clutch 31, the second magnetic clutch 32, and the third magnetic clutch 33 similar to those of the first embodiment are used, and the third yokes of the first embodiment arranged inside each magnetic clutch are arranged in three rows. The planetary gears arranged in a row are fixed to the outer periphery of the internal gear member so that the planetary gears connected to each other rotate around a common input shaft.

  In the apparatus shown in FIG. 15, the third yoke 46 corresponding to the first magnetic clutch 31 is fixed to the outer periphery of the first internal gear member 64 in the first planetary gear mechanism 61 in the three rows of planetary gear mechanism rows. The first planetary gear mechanism 61 includes a large-diameter first sun gear 66 driven by an input shaft 65 and a plurality of small-diameter first planetary gear groups 67 driven thereby. Similarly, the third yoke 47 corresponding to the second magnetic clutch 32 is fixed to the outer periphery of the second internal gear member 68 in the second planetary gear mechanism 62, and the second planetary gear mechanism 62 is connected to the input shaft 65. And a second sun gear 69 having an intermediate diameter directly connected to the second planetary gear group 70 and a plurality of second planetary gear groups 70 having an intermediate diameter driven by the second sun gear 69.

  Further, the third yoke 48 corresponding to the third magnetic clutch 33 is fixed to the outer periphery of the third internal gear member 71 in the third planetary gear mechanism 63, and the third planetary gear mechanism 63 is similarly input shaft. A third sun gear 72 having a small diameter directly connected to 65 and a plurality of third planetary gear groups 73 having a large diameter driven by the third sun gear 72 are provided. In the illustrated embodiment, an arm 74 is used as a carrier for integrally rotating the third planetary gear group around the axis of the input shaft 65, and an output shaft 75 is provided on the arm 74. In this embodiment, the cylindrical magnet fixing member 49 is fixed to the outside.

  Therefore, in the order from the center side of the mechanism, the first layer is the input shaft and the sun gear, the first layer and the second layer are the meshing portions of the sun gear and the planetary gear, the second layer is the output shaft, the carrier and the planetary gear, The second layer and the third layer are meshing portions of the planetary gear and the internal gear, the third layer is the internal gear (reduction speed / medium reduction / high reduction), and the third layer and the fourth layer are internal teeth according to the load torque. One of the gears and the fourth layer are magnetically coupled, and the other internal gears are idled. The fourth layer is a magnet-fixing yoke member, and the fourth layer and the outermost layer are relatively rotatable. The outermost layer is a multi-layer structure consisting of a cylindrical magnet fixing member and a second permanent magnet for turning on / off the magnetic coupling between the third layer and the fourth layer, making the various mechanisms compact. The configuration is made.

  When the input shaft 65 is rotated by an external motor or the like using the mechanism as described above, the second permanent magnets act on the second magnetic clutch 32 and the third magnetic clutch 33 as shown in FIG. If the magnetic clutch 31 is not applied, the third yoke 46 of the first magnetic clutch 31 is magnetically coupled according to the same principle as in the above embodiment, and the second yoke 47 and the third magnetic clutch 33 of the second magnetic clutch 32 are coupled. The third yoke 48 is in a freely rotating state. As a result, the second planetary gear mechanism 62 and the third planetary gear mechanism 63 are freely rotated along with the rotation of the sun gear. Therefore, in the first planetary gear mechanism 61 to which the internal gear member 64 is fixed, The first planetary gear group 67 that rotates around the input shaft 65 at a high speed by the first sun gear 66 having a diameter, and the arm 74 via a crankshaft 76 that supports and connects each planetary gear in a freely rotating state. Rotate.

  At this time, the planetary gear rotates around the input shaft at a high speed by the large-diameter sun gear and the small-diameter planetary gear meshing with the fixed internal gear, whereby the output shaft 75 rotates at a high speed. Further, at this time, the first internal gear 64 tries to rotate together with the planetary gear, but the row of magnet fixed yoke members that are magnetically coupled to the third yoke 46 of the first magnetic clutch 31 has a side portion thereof. The cylindrical magnet fixing member 49 connected to the connecting ring 26 and the spring 44 with a predetermined force is fixed to the outside, so that the rotation of the internal gear is suppressed. This magnetic coupling state is the same as that shown in FIG.

  When the load increases during driving of the load by such an output shaft, a large force is applied to the first internal gear 64 by the load applied to the output shaft 75 and rotates against the spring 44. 8B in FIG. 1, the second permanent magnet is inserted into the magnet fixing yoke member in the first magnetic clutch 31 and the third magnetic clutch 33, and the second magnetic clutch 32 is detached. Therefore, the second internal gear member 68 of the second planetary gear mechanism 62 corresponding to the second magnetic clutch 32 is fixed, and the others are in a free state. Therefore, the output shaft 75 is caused by the action of the second sun gear 69 having the intermediate diameter in the second planetary gear mechanism 62 and the second planetary gear group 70 having the intermediate diameter meshing with the second internal gear 68 fixed as described above. Driven at an intermediate speed, it can accommodate the increase in load.

  Similarly, when the load further increases, the force acting on the second internal gear 68 increases, so that the second internal gear 68 rotates against the spring 44, and the third yoke 47 of the second magnetic clutch Since the magnetically coupled magnet fixed yoke member row is rotated, the state is relatively similar to that in FIG. 8C in the first embodiment, and the first magnetic clutch 31 and the second magnetic clutch 32 have the magnet fixed yoke member. Since the second permanent magnet is inserted into the third magnetic clutch 33 and is released from the third magnetic clutch 33, it is fixed to the small-diameter third sun gear 72 in the third planetary gear mechanism 63 corresponding to the third magnetic clutch 33. The output shaft 75 is driven at a low speed by the action of the large-diameter third planetary gear group 73 meshing with the third internal gear 71, and can cope with an increase in load.

  When the load torque further increases from the high deceleration state, further relative rotation of the magnet fixing yoke member row 29 and the cylindrical magnet fixing member 49 is limited by a mechanical stopper. Thereafter, when the load gradually decreases, the state returns to the state shown in FIG. Further, the present transmission configured as described above can operate in the same manner with respect to rotation in the reverse direction to that described above, and thus can be operated with respect to rotation in both forward and reverse directions. .

  Compared with the first embodiment, the non-contact load-sensitive automatic transmission 60 according to the second embodiment having the above-described configuration is compared with the first embodiment. In contrast to the combination of magnetic clutches, the second embodiment has an integrated structure. In terms of the size, the first embodiment needs to be connected to the front speed reducer and the magnetic clutch side by side in the axial direction, and therefore must be long as a whole. In the second embodiment, the whole is integrally structured. Thus, the axial direction can be shortened. In the second embodiment, although it becomes larger in the radial direction, this becomes a rather advantageous structure as a torque transmission machine by the action of torque = radius × force.

  As for the multiple coaxial structure in the case of the N-stage transmission, in the first embodiment, the input shaft becomes N-fold, the magnetic clutch becomes triple, and the connection shaft becomes more complicated and difficult to manufacture as the number of stages increases. On the other hand, in the second embodiment, the structure of the entire transmission is simplified. When the number of stages is increased, the same structure is added in the axial direction, but the basic structure is not changed. is there. As for the rotating part, in the first embodiment, the front stage speed reducer, the connecting shaft, the input disk as the first layer of the magnetic clutch, the intermediate disk as the second layer of the magnetic clutch, and the output as the third layer of the magnetic clutch. In contrast to the configuration of the disk, in the second embodiment, only one is fixed, the first layer consisting of the input shaft and the sun gear, the second layer consisting of the output shaft and the carrier, and the others are idle. Since it becomes a configuration of an internal field gear and the number of rotating parts is reduced, the moment of inertia is reduced. The fourth layer, which has a large moment of inertia because it is composed of a large number of permanent magnets and yokes, has the characteristic that it is basically stationary although it rotates relative to the outermost layer in response to an increase or decrease in load torque.

  The present invention can be used for all medium- and small-scale mechatronics devices that could not be applied to conventional large-sized, complex and high-cost transmissions, and its application range is extremely wide. Production machines such as containers, while some parts of the operation require a large force, other parts require various drive mechanisms that require high-speed operation, cargo handling / conveying equipment such as chain blocks and jacks, quick alignment and powerful load drive It can be effectively used for various devices that need to be compatible with each other, care devices such as passenger lifts, and various devices that need to be reduced in size and weight and improve safety by reducing the power of the power source.

It is explanatory drawing showing the principle of the magnetic clutch mechanism used by this invention. It is explanatory drawing which shows the mechanism which arranges the magnetic clutch mechanism in parallel 3 rows, and drives each at a different speed. It is a figure which shows the 1st aspect at the time of switching the action | operation of a magnetic clutch using the mechanism of FIG. It is a figure which shows the 2nd aspect. It is a figure which shows the 3rd aspect. It is explanatory drawing of the cylindrical magnet fixing member which switches the action | operation of a magnetic clutch. It is a figure which shows the whole structure of the apparatus by Example 1 of this invention comprised combining the said each mechanism and member. It is a figure which shows the magnetic clutch switching action of the said apparatus, (a) is a 1st aspect, (b) is a 2nd aspect, (c) is a figure which shows a 3rd aspect. It is explanatory drawing of the force transmission path | route which drives load using the clutch switching mechanism of this invention. It is a figure which shows the effect | action at the time of driving the load by clutch switching at high speed and low speed, (a) (b) when not using the clutch switching mechanism, (c) (d) when using the clutch mechanism FIG. 6 is a graph of torque and power with respect to each speed. It is general explanatory drawing of the planetary gear mechanism used in Example 2 of this invention. It is a figure which shows the operation | movement aspect when using the planetary gear mechanism. It is the table | surface which put together the various operation modes when using the planetary gear mechanism. It is a figure which shows force transmission when the internal gear to fix using 3 said planetary gear mechanisms is selected. It is a figure which shows the whole structure of the apparatus by Example 2 of this invention. It is explanatory drawing of the apparatus which this inventor proposed previously.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Magnet fixed yoke member 11 1st permanent magnet 12 1st yoke 13 2nd yoke 14 1st yoke part 15 2nd yoke part 16 Opposite gap 25 2nd permanent magnet 29 Magnet fixed yoke member row | line | column 31 1st magnetic clutch 32 2nd Magnetic clutch 33 Third magnetic clutch 44 Spring 49 Cylindrical magnet fixing member 60 Non-contact load-sensitive automatic transmission 61 First planetary gear mechanism 62 Second planetary gear mechanism 63 Third planetary gear mechanism 64 First internal gear member 65 Input shaft 66 First sun gear 67 First planetary gear group 68 Second internal gear member 69 Second sun gear 70 Second planetary gear group 71 Third internal gear member 72 Third sun gear 73 Third planetary gear group 74 Arm 1 output shaft

Claims (3)

A magnet fixing yoke member for fixing a first permanent magnet having an N pole and an S pole arranged on each yoke side between the first yoke and the second yoke, and a gap between the end portions of the first yoke and the second yoke. And a second permanent magnet which is detachably disposed with a polarity opposite to that of the first permanent magnet in a gap between both the first yoke and the other end of the second yoke. A plurality of magnetic clutches arranged adjacent to each other,
The adjacent magnet fixing yoke members are connected and integrated by a connecting member to form a magnet fixing yoke member row,
The second permanent magnets in each row are fixed in a plurality of rows at different positions in the circumferential direction on the inner peripheral surface of the cylindrical magnet fixing member,
A spring is provided between the magnet fixing yoke member row and the cylindrical magnet fixing member,
Due to the relative rotation of the magnet fixing yoke member row and the cylindrical magnet fixing member, the second permanent magnet in any of the plurality of rows of the magnetic clutch is detached from between the first yoke and the second yoke, and the third yoke of the magnetic clutch The magnetic fixed yoke member is magnetically coupled, and a second permanent magnet in another row of magnetic clutch is inserted between the first yoke and the second yoke so that the magnetic coupling can be released.
A plurality of input shafts for driving the input discs fixed with the third yoke members in each row at different speeds by an external driving device; and an output shaft connected to the cylindrical magnet fixing member;
The force of the input shaft connected to the input disk of the magnetically coupled magnetic clutch is transmitted to the output shaft through the magnet fixing yoke member row and the cylindrical magnet fixing member,
The spring is expanded and contracted according to the load driven by the output shaft, the magnet fixing yoke member row and the cylindrical magnet fixing member are rotated relative to each other, and the other magnetic clutch is magnetically coupled. A non-contact type load sensitive automatic transmission characterized in that an output shaft is driven at different speeds by an input shaft connected to an input disk. A magnet fixing yoke member for fixing a first permanent magnet having an N pole and an S pole arranged on each yoke side between the first yoke and the second yoke, and a gap between the end portions of the first yoke and the second yoke. And a second permanent magnet that is detachably disposed with a polarity opposite to that of the first permanent magnet in a gap between the first yoke and the other end of the second yoke. A plurality of magnetic clutches arranged adjacent to each other,
The adjacent magnet fixing yoke members are connected and integrated by a connecting member to form a magnet fixing yoke member row,
The second permanent magnets in each row are fixed at different positions in the circumferential direction on the inner peripheral surface of the cylindrical magnet fixing member,
A spring is provided between the magnet fixing yoke member row and the cylindrical magnet fixing member,
Due to the relative rotation of the magnet fixing yoke member row and the cylindrical magnet fixing member, the second permanent magnet in any of the plurality of rows of the magnetic clutch is detached from between the first yoke and the second yoke, and the third yoke of the magnetic clutch The magnetic fixed yoke member is magnetically coupled, and a second permanent magnet in another row of magnetic clutch is inserted between the first yoke and the second yoke so that the magnetic coupling can be released.
A plurality of planetary gear mechanisms having different decelerations corresponding to the magnetic clutches provided in the plurality of rows are arranged in parallel, and the third yoke of the magnetic clutch is fixed to the outer periphery of the internal gear of each planetary gear mechanism, and each planetary gear mechanism Drive the sun gear on the same axis,
The support shafts of adjacent planetary gears are connected, and the output shaft is driven by the planetary gear carrier,
The internal gear of the corresponding planetary gear mechanism is magnetically fixed by the magnetically coupled arbitrary magnetic clutch, and the output shaft is driven by rotation about the input shaft of the internal gear,
The spring is expanded and contracted according to the load driven by the output shaft, the cylindrical magnet fixing member is rotated relative to the fixed magnet fixing yoke member, and the other magnetic clutch is magnetically coupled. A non-contact type load sensitive automatic transmission characterized in that an internal gear of a planetary gear mechanism corresponding to a magnetic clutch is magnetically fixed, and an output shaft is driven at different speeds by the same input shaft. A plurality of third yoke members in each row are provided on the outer periphery of the input disk,
The non-contact type load sensitive automatic transmission according to claim 1 or 2, wherein a plurality of magnetic clutches are provided corresponding to the plurality of third yokes.