JP4840470B2 - Drive unit with clutch - Google Patents

Description

  The present invention relates to a drive device with a clutch that is suitable for use as a drive device that is attached to a narrow place in a casing of equipment, particularly for opening and closing a damper of a ventilation fan.

  In general, an open / close damper of an air conditioner or a ventilation fan uses a motor with a clutch as a drive source for opening and closing the damper.

  FIG. 10 shows an internal structure of a conventional drive device with a clutch. Reference numeral 1 denotes a bottomed cylindrical casing provided with an insole plate 1A and an upper lid 1B for closing an upper opening. The motor 2 is disposed on the bottom of the bottomed cylindrical housing. The rotor 3 of the motor 2 is engaged with a gear 5 having a reverse rotation stopper 4, and the rotation is transmitted to the output shaft 9 via a clutch 20 and a series of reduction gear trains 8 that are contacted and separated by a solenoid 6. It has become so. Here, the solenoid 6 includes a movable body 6A in which an iron core and a movable yoke are integrated.

  On the other hand, as shown in FIG. 11, the clutch 20 includes a lower clutch body 21 having a large-diameter gear portion 21A that meshes with the rotor 3 of the motor 2, and a coaxial above the lower clutch body 21. And a small-diameter upper clutch body 22 having a gear portion 22A that meshes with the first gear of the reduction gear train 8.

  The lower clutch body 21 is rotatably provided on the shaft 23 by inserting a shaft 23 erected on the main body 1A of the casing 1 into a hole portion 21C formed in the center portion. On the other hand, the upper clutch body 22 can be rotated on the shaft 23 and can be brought into contact with and separated from the lower clutch body 21 by inserting the shaft 23 into a hole 22C similarly formed in the center. It is arranged. A spring 24 for biasing the upper clutch body 22 upward is interposed between the inner peripheral portions of the lower clutch body 21 and the upper clutch body 22.

  Further, the upper end surface 22D of the upper clutch body 22 is in contact with the movable body 6A of the solenoid 6 for clutch contact / separation, and when the movable body 6A is attracted downward by excitation of the solenoid 6, The body 22 is pressed downward against the biasing force of the spring 24 so as to approach the lower clutch body 21. Clutch teeth 21 </ b> B and 22 </ b> B that engage with each other when the upper clutch body 22 is pressed downward by the solenoid 6 are formed on the inner peripheral portions of the opposing surfaces of the lower clutch body 21 and the upper clutch body 22.

  Further, a cylindrical circumferential wall 25 is integrally formed on the outer side of the clutch teeth 21A of the lower clutch body 21 so as not to interfere with the reduction gear train 8 with the shaft 23 and the axis aligned. A brake member 26 is disposed inside the circumferential wall portion 25.

  The brake member 26 includes a pair of arc-shaped members 26 made of a metal plate (for example, brass) having a predetermined coefficient of friction, a resin material, or the like. As a result, the brake member 26 is slidable in the vertical direction with respect to the upper clutch body 22 and cannot be detached in the circumferential direction.

On the other hand, as shown in FIG. 10, the output shaft 9 located in the casing 1 is provided with a switch mechanism 10 for turning on and off the power to the motor 2.
The switch mechanism 10 includes a cam plate 11 fixed to the output shaft 9 and two contact points 12 and 12 that are brought into contact with and separated from each other by the rotation of the cam plate 11. The output shaft 9 has a predetermined rotation angle. , The contacts 12 and 12 are separated from each other to cut off the energization, and the motor 2 is stopped.

  Further, a pulley 13 is fixed to the upper end portion of the output shaft 9 protruding from the casing 1, and one end portion of the wire 14 is fixed to the outer periphery of the pulley 13, and a spring 15 for pulling back the pulley 13 is connected. Has been. Note that the spring 15 for returning the pool 13 is not necessary when a load due to its own weight such as the opening / closing door acts from the outside, such as when used for opening / closing the door of a ventilation fan.

  When the drive device with the clutch having the above-described configuration is used as, for example, a drive source for opening / closing a damper, the other end of the wire 14 is connected to the operation end of the damper, and the power is turned on. When energized, the movable body 6A is attracted and the upper clutch body 22 is pressed downward against the biasing force of the spring 24, whereby the clutch teeth 21B and 22B of the upper and lower clutch bodies 21 and 22 mesh with each other. The clutch 20 is connected, and the rotation of the rotor 3 of the motor 2 is transmitted to the output shaft 9 through the clutch 20 and the reduction gear train 8.

  As a result, the pulley 13 winds the wire 14 against the urging force of the spring 15 or the weight of the damper, and gradually opens the damper. When the damper is fully opened, the cam plate 11 separates both the contacts 12 and 12 and stops energization of the motor 2. On the other hand, since the energization to the solenoid 6 is continued, the output shaft 9 is fixed by the action of the reverse rotation stopper 4 via the clutch 20, and the damper is held in a fully opened state.

Next, when the power is turned off, the energization of the solenoid 6 is stopped first, and the upper clutch body 22 is moved away from the lower clutch body 21 by the urging force of the spring 24 so that the clutch teeth 21B and 22B are engaged. It will be solved.
Then, the output shaft 9 is idled in the direction in which the damper is closed only by the load for closing the damper and the urging force of the spring 15 or the weight of the damper, whereby the upper clutch body 22 is idled via the reduction gear train 8. To do. When the upper clutch body 22 starts idling, the brake member 26 comes into pressure contact with the circumferential wall portion 25 of the lower clutch body 21 due to the centrifugal force accompanying the rotation. As a result, the brake member 26 receives the frictional force corresponding to the rotational speed of the upper clutch body 22 and the rotational speed of the upper clutch body 22 is suppressed, so that the damper can be closed gently.
A similar drive device with a clutch is also disclosed in, for example, Patent Document 1 below.

JP 2002-276705 A

  By the way, when this type of drive device with a clutch is incorporated for opening and closing the lid of the ventilation fan unit 30 as shown in FIG. 12, the drive device with a clutch M is generally provided at the central portion in the casing 31. In order to avoid interference with the rotary vane unit 31 that is rotationally driven by the motor 31a, it is disposed at the corner of the casing 31.

  On the other hand, in the drive device with a clutch shown in FIGS. 10 and 11, the movable body 6A of the solenoid 6 is integrated with the iron core and moves in the vertical direction in FIG. For this reason, there exists a fault that the thickness dimension between insole board 1A and the upper cover 1B becomes large. On the other hand, the ventilating fan unit 30 normally cannot make use of the solenoid 6 having the above-described configuration because it is necessary to make the thickness dimension as small as possible.

Therefore, as shown in FIG. 13, in the conventional clutch-equipped drive unit incorporated in the ventilation fan unit 30, the solenoid 32 is placed on the insole plate 1 </ b> A of the casing 1, and the plate surface of the insole plate 1 </ b> A with the axial direction of the coil 33. (Hereinafter also referred to as horizontal placement).
The solenoid 32 is configured such that the iron core in the coil 33 and the fixed yoke 34 are integrated, and the movable yoke 35 is positioned above the upper clutch body 22 shown in FIG.

  Here, the movable yoke 35 is an L-shaped flat plate member including an contacting / separating plate 35 a facing the iron core and a driving plate positioned above the upper clutch body 22, and energizes the coil 33. When the contact / separation plate 35a moves to the iron core side, the upper clutch body 22 is pressed downward by the drive plate by rotating the vicinity of the intersection with the drive plate as a fulcrum. To do.

  In this drive device with a clutch, a lead wire 36 connected to one end of the coil of the motor 2 is drawn out from the corner of the casing 1 to the outside. The lead wire 36 is electrically connected to one end 33a of the coil 33 of the solenoid 32 via a connecting fitting 37 to which solder is soldered (see FIG. 7).

  On the other hand, the lead wire 38 connected to the other end of the coil of the motor 2 is connected to the fixed-side contact 12 in the cam plate 11 by soldering, and the lead wire 39 connected to the movable-side contact 12 is connected to the above. It is drawn out of the casing from the corner. The other end 33b of the coil 33 of the solenoid 32 is electrically connected to the lead wire 39 by being connected to the movable contact 12 via a soldered fitting 40 (see FIG. 7).

  Further, connection terminals (not shown) are provided at the distal ends of the lead wires 36 and 39 drawn to the outside from the casing 1, and the connection terminals are provided in the casing 31 of the ventilation fan unit 30. Connected to the connected terminal.

  In the conventional clutch-equipped driving device having the above-described configuration, the length of the lead wires 36 and 39 is determined based on the mounting position of the ventilation fan unit 30 incorporated in advance and the length to the connection terminal to manufacture the product. There is a need to.

However, the drive device with a clutch manufactured in this way is a type of ventilation fan unit of a different size because the lead wires 36 and 39 are connected to predetermined positions by soldering inside the casing 1. Cannot be used.
For this reason, it is necessary to prepare various lead wire 36 and 39 lengths according to the type of the ventilation fan unit, and there is a problem that inventory management becomes complicated.

  Therefore, it is also conceivable to provide a lead wire terminal in the casing 1 and connect the other end portion of the lead wire having one end portion connected to the connection terminal to the terminal. This is because the drive device with the clutch having the same configuration can be used for various types of ventilation fan units having different dimensional specifications only by preparing the lead wires having different lengths.

  However, in the casing 1, the solenoid 32 arranged horizontally to reduce the thickness step drives the upper clutch body 22 against the urging force of the spring 24. It is necessary to secure the number of windings. As a result, in addition to the increase in length, the movable yoke 35 needs to be positioned above the lower upper clutch body 22.

  For this reason, a large area is required on the insole plate 1A in the casing 1 for mounting the solenoid 32, and the installation position is also restricted, and further, the output shaft 9 is fixed on the insole plate 1A. Since it is also necessary to dispose the switch mechanism 10 including the cam plate 11 and the two contact points 12 and 12 that are brought into contact with and separated from each other by the rotation of the cam plate 11, a space for installing the terminals cannot be secured. There was a problem.

  The present invention has been made in view of the above circumstances, and it is possible to arrange a terminal portion for connecting an external lead wire connected to a connection terminal of equipment in a casing without causing an increase in size. An object of the present invention is to provide a clutch-equipped drive device.

In order to solve the above problems, a motor and a plurality of gears sequentially meshed with a rotor gear of the motor are provided in a lower portion of the bottomed cylindrical casing according to claim 1, and the casing is provided in a final gear. A reduction gear train in which an output shaft extending from the motor is integrated, and a clutch incorporated in the reduction gear train to transmit or release rotation between the motor and the output shaft. In the clutch-equipped drive device in which the solenoid for attaching and detaching the clutch is disposed on the upper part of the casing and the upper opening of the casing is closed by the upper lid , the iron core is inserted in the center of the solenoid. and coil bobbin and becomes provided with a plate-shaped fixed yoke which is fixed to one end in the axial direction of the coil bobbin, and a plate-like movable yoke disposed at the other end, said fixed yaw Was positioned on the upper lid side, and with the movable yoke is located in the in decking side, together with the coil bobbin is mounted in a direction perpendicular to the in decking the axis, the movable yoke has one end portion upper face Facing the iron core and facing the lower surface of the other end to the upper side of the clutch so as to be rotatable in the out-of-plane direction of the insole plate around the center portion, and when the solenoid is operated, the one end And the other end are arranged to rotate to the iron core side and the clutch side, respectively, to operate the clutch, and an external power line is connected to the insole plate of the outer peripheral part of the casing. A pair of connectable terminal portions are attached, and lead wires from the motor and the solenoid are connected to the terminal portions.

  According to a second aspect of the present invention, in the first aspect of the present invention, the outer peripheral wall of the casing is formed with a pair of power supply line insertion ports adjacent to each other at the distal end thereof. In addition, the pair of terminal portions is provided on the outer peripheral portion with each extension line facing the insertion port.

  Furthermore, the invention described in claim 3 is the invention according to claim 1 or 2, which is arranged at a corner portion of a rectangular casing provided with a rotor blade at the center for opening and closing the lid of the ventilation fan unit. It is characterized by that.

  According to the invention described in any one of claims 1 to 3, the solenoid is attached with its axis line oriented in a direction orthogonal to the insole plate (hereinafter also referred to as vertical installation), and the movable yoke is attached to the insole plate. It is arranged on the side, the upper end of one end part faces the iron core, and the lower surface of the other end part faces the upper side of the clutch so as to be rotatable in the out-of-plane direction of the insole plate, By appropriately selecting the length dimension of the yoke, it can be arranged at a desired position on the insole board.

  Therefore, it is possible to attach a pair of terminal portions to which an external power line can be connected on the insole board. And by providing the said terminal part, also with respect to the apparatus of the type from which a dimension specification differs, the drive apparatus with a clutch attached to the predetermined position, and the connection terminal previously arrange | positioned at the said apparatus side A power line (lead wire) having an appropriate length is selected according to the length between the terminals, and the power line is used to connect the terminal of the drive device with the clutch and the terminal of the connection terminal. Thus, the clutch-equipped drive device can be used as it is as a common component. As a result, there is an advantage that inventory management becomes easy.

  Further, since the degree of freedom of arrangement of the solenoid increases, a desired magnetic attractive force can be ensured by increasing the outer diameter of the coil and increasing the number of coil turns. For this reason, it is possible to reduce the thickness of the coil in the axial direction to further reduce the thickness of the entire apparatus. In addition, the coil space can also be increased by 20% or more compared to the prior art.

  Furthermore, according to the invention described in claim 2, the pair of power supply line insertion ports are formed adjacent to each other on the outer peripheral wall of the casing, and the extension terminals of the pair of terminal portions face the insertion port. Thus, the two power lines can be pulled out from substantially the same position of the casing.

  Therefore, the clutch-equipped drive device according to the present invention is provided with a rotor blade at the center for opening / closing the lid in a ventilation fan unit having a narrow space for installation, particularly as in the third aspect of the invention. When it is used as one arranged at the corners of a shaped casing, it has a remarkable effect.

It is a top view which shows the state which removed the upper cover of the drive device with a clutch which concerns on this invention. It is a top view which shows the state which removed the solenoid of FIG. It is a longitudinal cross-sectional view of the upper part of the insole board of FIG. It is a side view which shows the fixed yoke of FIG. FIG. 2 shows the movable yoke of FIG. 1, where (a) is a plan view and (b) is a front view. It is a longitudinal cross-sectional view in the attachment part of the terminal part of FIG. It is a wiring diagram of the drive device with a clutch of FIG. It is a top view of the whole drive apparatus with a clutch of FIG. It is a bottom view of FIG. It is an expanded vertical sectional view showing a conventional drive device with a clutch. It is a longitudinal cross-sectional view which expands and shows the clutch part of FIG. It is a front view which shows the state which attached the drive device with a clutch to the ventilation fan unit. It is a top view which shows the state which removed the upper cover of the drive device with a clutch of FIG.

  Based on FIGS. 1-9, one Embodiment of the drive device with a clutch which concerns on this invention is described. In these figures, the schematic shape of the casing 1 and the switch mechanism 10 including the motor 2, the reduction gear train 8, the clutch 20, and the cam plate 11 on the insole plate 1A and the two contacts 12 from the insole plate 1A are shown. Since it is the same structure as what was shown in FIGS. 10-13, below, the same code | symbol is attached | subjected and the description is simplified.

  In this clutch-equipped drive device, a solenoid 50 is provided between the insole plate 1A and the upper lid 1B (in FIG. 1 and FIG. 2, the upper lid 1B is omitted for visual convenience). The solenoid 50 includes a coil bobbin 51 in which an iron core 51a is inserted at the center and a coil is wound around the outer periphery, and a flat fixed yoke 52 fixed to one end of the coil bobbin 51 in the axial direction. This is generally composed of a flat movable yoke 53 arranged at the other end.

  Here, the casing 1 is formed in a substantially square shape in the plan view shown in FIGS. 1 and 2, and the solenoid 50 can arrange terminal portions 60 a and 60 b described later on the outer peripheral portion of the casing 1. Thus, it is arranged at the central portion adjacent to the switch mechanism 10. The solenoid 50 is mounted with the movable yoke 53 positioned on the insole plate 1A side and the axis of the coil bobbin 51 oriented in a direction orthogonal to the insole plate 1A.

On the other hand, as shown in FIG. 3, the movable yoke 53 is disposed with the one end upper surface 53 a facing the iron core 51 a and the other end lower surface 53 b facing the upper clutch body 22 of the clutch 20. ing. The movable yoke 53 is provided so as to be rotatable in the out-of-plane direction of the insole plate 1A around a central portion that engages with a stepped portion 54 provided on the insole plate 1A.
Accordingly, openings 55a and 55b for allowing the movable yoke 53 to rotate in the out-of-plane direction are formed in the insole plate 1A.

  On the other hand, an L-shaped bent leg 52a is integrally formed at one end of the fixed yoke 52. As shown in FIG. 4, the lower end of the leg 52a has an insole plate 1A. An insertion piece 52b to be inserted into the stepped portion 54 is formed. Further, a pair of convex portions 52d are formed inside the insertion piece 52b, and shoulder portions 52c are formed on both upper sides of the leg portion 52a.

  Further, on the insole plate 1A, support pillars 56 are erected on both sides of the leg 52a of the fixed yoke 52 and on one side of the other end, respectively. A claw portion 56 a that engages with the shoulder portion 52 c of 52 a or the upper surface of the fixed yoke 52 is formed.

  In the solenoid 50, the insertion piece 52b of the leg portion 52a is inserted into the step portion 54 of the insole plate 1A, and at this time, the claw portions 56a of the pair of support pillars 56 are connected to the shoulder portion 52c of the leg portion 52a. The claw portions 56a of the other support pillars 56 are engaged with the upper surface of the other end portion of the fixed yoke 52, and are attached on the insole plate 1a.

  Here, as shown in FIG. 5, notches 53 c are formed on both sides of the central portion of the movable yoke 53, and the notches 53 c are formed on the legs 52 a of the fixed yoke 52. By inserting the portion 52d, the movement in the longitudinal direction during the rotation is prevented.

  Further, a pair of terminal portions 60 a and 60 b to which external lead wires (power supply wires) 70 and 71 can be connected are attached on the insole plate 1 </ b> A of the outer peripheral portion of the casing 1. That is, an outer lead wire insertion port 58a located in the vicinity of the corner and an insertion port 58b adjacent to the insertion port 58a are formed in one side 57a of the outer peripheral wall of the casing 1. On the insole plate 1A, a pair of wall portions 59a whose leading end communicates with the insertion port 58a is provided upright along the side 57b adjacent to the one side 57a, and the base end portions of these wall portions 59a. One terminal portion 60a is fitted between them.

Here, faston terminals are used as the terminal portions 60a and 60b.
In addition, a pair of wall portions 59b whose distal end portions communicate with the insertion port 58b are erected so as to extend toward the other side 57c, and the other terminal is interposed between the base end portions of these wall portions 59b. The part 60b is fitted. The pair of wall portions 59a and 59b have external leads introduced from the insertion ports 58a and 58b side by gradually decreasing the width dimension from the insertion ports 58a and 58b side toward the terminal portions 60a and 60b side, respectively. A guide portion 59c is formed to guide the tip of the wire toward the terminal portions 60a and 60b.

  And in this drive device with a clutch, as shown in FIGS. 1, 2, and 7, the lead wire 61 connected to one end of the coil of the motor 2 is connected to one terminal 60a. Yes. Further, a connection terminal 62a provided at the flange portion of the coil bobbin 51 and connected to one end of the coil is connected to the terminal portion 60a via a terminal 63a.

  On the other hand, the lead wire 64 connected to the other end of the coil of the motor 2 is connected to the fixed-side contact 12 of the cam plate 11 by soldering, and the movable-side contact 12 is connected to the other end via the connection metal 65. It is connected to the terminal part 60b. Note that the connection terminal 62b to which the other end of the coil provided on the flange portion of the coil bobbin 51 is connected is connected to the terminal portion 60b via a soldered terminal 63b.

  And these terminal parts 60a and 60b have a length dimension according to the distance from the attachment position of the ventilation fan unit to which this drive apparatus with a clutch is each attached to the power supply terminal provided in the casing of the said ventilation fan unit. Ends of external lead wires (power supply wires) 70 and 71 (see FIGS. 8 and 9) are connected.

  In the clutch-equipped drive device configured as described above, the solenoid 50 is attached in a vertical position with its axis line oriented in a direction orthogonal to the insole plate 1A, and the movable yoke 53 is disposed on the insole plate 1A side, Because the upper surface 53a faces the iron core 51a and the other end portion lower surface 53b faces the upper clutch body 22, and is provided so as to be rotatable in the out-of-plane direction of the insole board 1A around the center portion. By appropriately selecting the length dimension of the movable yoke 53, the movable yoke 53 can be arranged at a desired position on the insole board 1A.

  Therefore, it becomes possible to attach a pair of terminal parts 60a and 60b which can connect the lead wires 70 and 71 from the outside on the insole board 1A. And by providing these terminal portions 60a and 60b, the clutch-equipped drive device mounted at a predetermined position and the casing of the ventilation fan unit are also arranged in advance for the types of ventilation fans of different dimensions. The lead wires 70 and 71 having an appropriate length dimension are selected according to the length dimension between the connecting terminal and the terminal terminal 60a, 60b of the clutch-equipped driving device and the terminal of the connecting terminal. It becomes possible to use the drive device with a clutch as it is as a common component simply by connecting it to. As a result, there is an advantage that inventory management becomes easy.

  Further, since the degree of freedom of arrangement of the solenoid 50 increases, a desired magnetic attractive force can be ensured by increasing the outer diameter of the flange portion of the coil bobbin 51 and increasing the number of coil turns. For this reason, the axial thickness of the coil bobbin 51 can be reduced to further reduce the thickness of the entire apparatus.

  Further, the insertion ports 58a and 58b of the pair of external lead wires 70 and 71 are formed adjacent to the outer peripheral wall of the casing 1, and the extension portions of the terminal portions 60a and 60b are inserted into the insertion ports 58a by the wall portions 59a and 59b. , 58b, the two external lead wires 70, 71 can be pulled out from substantially the same position of the casing 1.

  In addition, since the guide portions 59c for guiding the insertion of the distal end portions of the external lead wires 70 and 71 are formed on the wall portions 59a and 59b, the distal end portions of the external lead wires 70 and 71 are inserted from the insertion ports 58a and 58b. It is possible to easily connect the external lead wires 70 and 71 to the terminal portions 60a and 60b simply by inserting them into the terminal portions 60a and 60b and crimping the terminal portions 60a and 60b.

  It can be used as a drive device attached to a narrow place in a casing for opening and closing a damper of a ventilation fan.

DESCRIPTION OF SYMBOLS 1 Casing 1A Insole board 1B Top cover 2 Motor 8 Reduction gear train 9 Output shaft 20 Clutch 50 Solenoid 51 Coil bobbin 51a Iron core 52 Fixed yoke 53 Movable yoke 53a One end upper surface 53b Other end lower surface 60a, 60b Terminal portion 61, 64 Lead wire 62a, 62b Connection terminal 63a, 63b Terminal 70, 71 External lead wire (power supply line)

Claims (3)

A reduction gear having a motor and a plurality of gears sequentially meshed with a rotor gear of the motor at the bottom of a bottomed cylindrical casing, and an output shaft extending from the casing integrated with the final gear. And a clutch that is incorporated in the reduction gear train and transmits or releases the rotation between the motor and the output shaft. The clutch is attached to and detached from the upper part via an insole plate. In the drive device with a clutch in which the solenoid to be operated is disposed and the upper opening of the casing is closed by the upper lid ,
The solenoid includes a coil bobbin in which an iron core is inserted in the center, a flat fixed yoke fixed to one end in the axial direction of the coil bobbin, and a flat movable yoke disposed at the other end. Te becomes, the fixed yoke is located on the upper lid side, and the movable yoke is positioned at the in decking side, together with the coil bobbin is mounted in a direction perpendicular to the in decking the axis, the movable The yoke is provided so that the upper surface of one end portion faces the iron core and the lower surface of the other end portion faces the upper side of the clutch so as to be rotatable in the out-of-plane direction of the insole plate around the center portion. When the solenoid is operated, the one end and the other end are arranged to rotate to the iron core side and the clutch side, respectively, to operate the clutch,
A pair of terminal parts to which an external power line can be connected are attached to the insole plate on the outer peripheral part of the casing, and lead wires from the motor and the solenoid are connected to the terminal part. A clutch-equipped drive device.   In the outer peripheral wall of the casing, a pair of power supply wire insertion ports that can be connected to the terminal portion are formed adjacent to each other at the distal end portion, and the pair of terminal portions have their extension lines connected to the insertion port. The drive device with a clutch according to claim 1, wherein the drive device is provided on the outer peripheral portion.   The drive device with a clutch according to claim 1 or 2, wherein the drive device for a clutch according to claim 1 or 2 is disposed at a corner portion of a rectangular casing provided with a rotor blade at a central portion for opening and closing a lid in a ventilation fan unit.

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