JP3457789B2 - Drive with clutch - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device with a clutch used as a drive source for opening and closing a damper of an air conditioner.

[0002]

2. Description of the Related Art As is well known, for example, in an air conditioner or the like having an open / close type damper, a clutch type drive device for opening / closing the damper is incorporated. Figure 4
8 shows a conventional clutch type drive device of this type developed by the present inventors. In FIG. 4, reference numeral 1 is a casing including a bottomed cylindrical main body 1A and an upper lid 1B that closes an upper opening of the main body 1A, and a motor 2 is arranged at the bottom of the casing 1. The rotor 3 of the motor 2 has a gear 5 having a reverse rotation stopper 4.
The rotation is transmitted to the output shaft 9 via the clutch 20 and the series of reduction gear trains 8 which are brought into contact with and separated from each other by the solenoid 6.

The clutch 20 is shown in FIGS.
As shown in FIG. 2, a lower clutch body (first clutch body) 21 having a large-diameter gear portion 21A that meshes with the rotor 3 of the motor 2 and a coaxially opposed upper portion of the lower clutch body 21. The upper clutch body (second clutch body) 22 has a small diameter and is provided with a gear portion 22A that meshes with the first stage gear of the reduction gear train 8. The lower clutch body 21 is rotatably provided on a shaft 23 provided upright on the main body 1A of the casing 1, while the upper clutch body 2 is provided.
The lower clutch body 21 is rotatable about the shaft 23 and
It is arranged so that it can be moved toward and away from. A spring 24 (biasing means) 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 of the upper clutch body 22 is in contact with the movable body 6A of the solenoid 6 for engaging and disengaging the clutch, and when the movable body 6A is attracted downward by the excitation of the solenoid 6, The upper clutch body 22 is pressed downward against the biasing force of the spring 24 so as to approach the lower clutch body 21. Then, on the inner peripheral portions of the facing surfaces of the lower clutch body 21 and the upper clutch body 22, when the upper clutch body 22 is pressed downward by the solenoid 6, the clutch teeth 21B, 22 are engaged with each other.
B is formed. Here, the clutch teeth 21B,
In 22B, the angle θ formed by the circumferentially inclined surface 21C (22C) and the reference line O parallel to the axis is set to 40 ° or more.

Further, a cylindrical circumferential wall portion 25 is integrally formed outside the clutch teeth 21A of the lower clutch body 21 at a position where it does not interfere with the reduction gear train 8 with its axis aligned with the shaft 23. An annular brake member 26 as shown in FIG. 6 is arranged inside the circumferential wall portion 25. The brake member 26 is composed of a pair of arc-shaped arc-shaped members 26A made of a metal plate having a predetermined friction coefficient such as brass, and a flexible rib 26B connecting these members. The elasticity of allows the diameter to be easily expanded when centrifugal force is applied. Incidentally, the rib 26B is integrally formed between the end faces 27 of the arc-shaped member 26B so as to be located on the same plane as the outer peripheral surface of the arc-shaped member 26A.

At the lower end of the outer peripheral portion of the upper clutch body 22, a pair of projections 28 projecting outward in the radial direction are formed in the diametrical direction, and each projection 28 is the arc-shaped member 2.
It is fitted between the end faces 27 of 6A. As a result, the brake member 26 is arranged so as to be slidable in the vertical direction with respect to the upper clutch body 22 and not disengageable in the circumferential direction. As shown in FIG. 4, the main body 1A of the casing 1 is provided with a protrusion 16 for preventing the brake member 26 from falling off at a position facing the brake member 26.

On the other hand, as shown in FIGS. 4 and 8, the output shaft 9 located in the casing 1 is provided with a switch mechanism 10 for turning on and off the power supply to the motor 2. The switch mechanism 10 is composed of a cam plate 11 fixed to the output shaft 9 and two contacts 12 and 12 which are brought into contact with and separated from each other by the rotation of the cam plate 11, and the output shaft 9 has a predetermined rotation angle. Contact point 12,
12 are separated from each other and turned off, so that the motor 2 is stopped. As shown in FIG. 8, the switch mechanism 10 is supplied with 100V AC power, and this circuit converts the AC power into DC through the converter 29 to drive the solenoid 6. The circuit of is attached. Further, a pulley 13 is fixed to the upper end of the output shaft 9 protruding from the casing 1, one end of the wire 14 is fixed to the outer circumference of the pulley 13, and a spring 15 for pulling back the pulley 13 is connected. There is.

When the clutch drive device having the above construction is used, for example, for opening and closing the damper of an air conditioner, the other end of the wire 14 is connected to the operating end of the damper. When the power is turned on, the solenoid 6
Is energized, the movable body 6A is attracted, and the upper clutch body 22 is pressed downward against the urging force of the spring 24, so that 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 via the clutch 20 and the reduction gear train 8. As a result, the pulley 1
3 winds up the wire 14 against the biasing force of the spring 15 and gradually opens the damper. Then, when the damper is fully opened, the cam plate 11 separates the contacts 12, 12 from each other to stop the power supply to the motor 2. On the other hand, since the solenoid 6 continues to be energized, 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 the fully opened state.

Next, when the power is turned off, the energization of the solenoid 6 is first stopped, and the urging force of the spring 24 moves the upper clutch body 22 in the direction away from the lower clutch body 21 to move the clutch teeth 21B, 22B. The engagement is released. Then, the output shaft 9 idles in the direction in which the damper is closed due to the load of the damper closing and the urging force of the spring 15, which causes the upper clutch body 22 to idle through the reduction gear train 8. At this time, when the upper clutch body 22 starts to rotate idly, the brake member 26 is expanded in diameter by the centrifugal force associated with the rotation thereof, and comes into pressure contact with the circumferential wall portion 25 of the lower clutch body 21. As a result, the brake member 26
When the rotational speed of the upper clutch body 22 is suppressed by receiving the frictional force corresponding to the rotational speed of the upper clutch body 22, the damper is gently closed.

Therefore, according to such a clutch-equipped drive device, it is possible to prevent excessive wear caused by the idling of the reduction gear train 8 via the output shaft 9 when the damper is closed. , The damper does not close vigorously and does not generate large noise or vibration,
There is an advantage that the operation is graceful and the feeling of luxury can be enhanced.

[0011]

By the way, in recent years, in this type of clutch drive device, from the viewpoint of simplification of the structure and reduction of the number of parts, the converter 29 is omitted and the solenoid 6 is directly connected to an alternating current. There is a request to drive with a power supply. However, if the solenoid 6 is to be driven by an AC power source, there is a drawback that the attraction force for the movable body 6A is reduced as compared with the case of a DC power source. Therefore, when the clutch 20 shown in FIG. 7 is connected, the pressing force F acting in the normal direction from the inclined surface 21C of the clutch tooth 21B to the inclined surface 22C of the clutch tooth 22B by the driving force of the lower clutch body 21 is increased. Due to the upward component force F ₁ , the upper clutch body 22 is pushed upward and the mutual engagement of the clutch teeth 21B and 22B is released.
There is a problem that the clutch 20 is disengaged and the rotation of the motor 2 cannot be transmitted to the output shaft 9.

The present invention has been made based on such a background, and even if the solenoid for connecting the clutch is directly driven by the AC power source, the clutch is not likely to be disengaged. Therefore, the structure is simplified and the number of parts is increased. It is an object of the present invention to provide a drive device with a clutch capable of reducing the above.

[0013]

A clutch-equipped drive device according to claim 1 is a clutch-equipped drive device in which a clutch is interposed between a rotor of a motor and an output shaft. A first clutch body connected to the rotor of the motor; and a second clutch body connected to the output shaft and provided so as to be able to come into contact with and separate from the first clutch body,
Energizing means that is interposed between the first and second clutch bodies to urge the first and second clutch bodies in directions away from each other, and one clutch body to approach the other clutch body. A solenoid driven by an AC power source is provided, and clutch teeth that engage with each other when approached by the solenoid are formed on the facing surfaces of the first and second clutch bodies, and engage with each other. The angle formed by the inclined surface of the clutch tooth and a reference line parallel to the contacting / separating direction on the inclined surface is set in the range of 5 ° or more and less than 40 ° , and
A circumferential wall portion is formed on the first clutch body, and the circumferential wall portion is formed.
An annular brake member is arranged inside the
On the outer periphery of the second clutch body, projecting outward in the radial direction.
It engages with the brake member, and centrifugal force causes
A protrusion is formed to press the brake member against the circumferential wall.
And the clutch teeth are formed on the outer peripheral side of the circumferential wall.
It is characterized by being made .

The invention described in claim 2 is characterized in that the angle described in claim 1 is further in the range of 10 ° to 25 °.

[0015] In the clutched drive device according to claim 1 or 2, the first and second clutch body, there is an inclination angle of the inclined surfaces of the clutch teeth 5 ° or more to be engaged with each other 40 Since it is set to a steep inclination closer to the contacting / separating direction than the conventional one, less than 10 °, and preferably in the range of 10 ° to 25 °, the driving force of the first clutch body makes Since the upward component force of the pressing force acting on the clutch teeth of the second clutch body is reduced, and as a result, the force that pushes up the second clutch body is relaxed, the magnetic attraction force of the solenoid is increased. Even if an inferior AC is used, it is possible to prevent the clutch teeth from being disengaged from each other and the clutch from being disengaged, and thus a converter for converting the AC power supply into a DC is not required,
It is possible to simplify the structure of the entire device and reduce the number of parts.

Here, the inclination angle of the inclined surface of the clutch teeth is set to be in the range of 5 ° or more and less than 40 °.
If the angle is less than 5 °, the inclination angle of the inclined surface of the clutch tooth becomes too steep, and the engagement when the first and second clutch bodies come into contact with and separate from each other is not smoothly performed. Appropriate, on the other hand, if the above angle exceeds 40 °,
This is because the effect of reducing the upward component force acting from the clutch teeth of the first clutch body intended by the present invention cannot be obtained. From this point of view, it is necessary that the inclination angle is in the range of 5 ° or more and less than 40 °,
Further, as in the invention described in claim 2, in the range of 10 ° to 25 °, smooth engagement / disengagement of the clutch teeth is not sacrificed, and the above-mentioned upward component force is sufficiently reduced. It is possible and more preferable.

Further , since the clutch is provided with a brake member for preventing abrupt rotation of the second clutch body during idling , and the clutch teeth are arranged on the outer peripheral side of the brake member, When the driving torque of the first clutch body is the same as the conventional one, the pressing force acting on the inclined surface of the clutch teeth becomes small, so that the upward component force for pushing up the second clutch body is reduced. Can
It

[0018]

1 to 3 show an essential part of a clutch in an embodiment of a driving device with a clutch according to the present invention, and other configurations are the same as those shown in FIG. Since they are the same, the same reference numerals are used in the following description to simplify the illustration and description. Figure 1
In FIG. 3, in the drive device with the clutch,
Instead of the clutch 20 shown in FIG. 4, a clutch having a lower clutch body (first clutch body) 30 and an upper clutch body (second clutch body) 32 is provided. The lower clutch body 30 has a large-diameter gear portion 30A that meshes with the rotor 3 of the motor 2 formed on the outer peripheral portion, and the annular brake member 26 is disposed on the inner peripheral side of the upper surface thereof. The recess 31 is formed, and the circumferential wall 33 is formed on the outer peripheral side of the recess 31. And this circumferential wall portion 3
Clutch teeth 30B ... Are formed at equal intervals at six locations on the outer circumferential side of the No. 3 in the circumferential direction. Further, as shown in FIG. 3, a small-diameter upper clutch body 32 having a gear portion that meshes with the first-stage gear of the reduction gear train 8 is provided to the lower clutch body 30 so as to be freely contactable and separable. Clutch teeth 32B that engage with the clutch teeth 30B when the upper clutch body 32 approaches the lower clutch body 30 are formed on the lower surface of the upper clutch body 32.

Then, these clutch teeth 30B, 32B
The angle between the inclined surfaces 30C and 32C and the reference line O parallel to the contact and separation direction on the inclined surfaces 30C and 32C is
As shown in FIG. 3, θ ₁ is set in the range of 5 ° or more and less than 40 °, more preferably in the range of 10 ° to 25 °. On the other hand, on the lower end of the inner peripheral portion of the upper clutch body 32, a pair of protrusions protruding inward in the radial direction are formed in the diametrical direction, and each protrusion is an end surface 27 of the arc-shaped member 26A of the brake member 26. It is fitted in between. As a result, the brake member 26 is arranged so as to be slidable in the up-down direction with respect to the upper clutch body 32 and not detachable in the circumferential direction. Further, the movable body 6A is arranged above the upper clutch body 32, and the movable body A is an AC driven solenoid (not shown) arranged in place of the DC solenoid. The upper clutch body 32 is suction-driven in a direction approaching the lower clutch body 30.

When the clutch-equipped drive device having the above-mentioned structure is used similarly for opening and closing the damper of an air conditioner, for example, when the power is first turned on, the solenoid is energized by the supplied AC power to move the movable body. 6A is sucked and the upper clutch body 32 is pressed downward, whereby mutual clutch teeth 30B of the upper and lower clutch bodies 30, 32,
32B meshes with each other to connect the clutch, and the rotation of the rotor 3 of the motor 2 is transmitted to the output shaft 9 via the clutch and the reduction gear train 8. As a result, the pulley 13 becomes the spring 1.
The wire 14 connected to the operation end of the damper is wound up against the urging force of 5, and the damper is gradually opened. And
When the damper is fully opened, the cam plate 11 contacts both contacts 12,
12 is separated and the power supply to the motor 2 is stopped.

Next, when the power is turned off, the energization of the solenoid is first stopped, and the urging force of the spring 24 causes the upper clutch body 32 to move in a direction away from the lower clutch body 30 to engage the clutch teeth 30B and 32B. Load and spring 1 when the damper is closed and the damper is closing
The output shaft 9 idles due to the urging force of 5, which causes the upper clutch body 32 to idle through the reduction gear train 8. And
When the upper clutch body 32 starts idling, the brake member 26 is expanded in diameter due to the centrifugal force associated with the rotation, and is brought into pressure contact with the circumferential wall portion 33 of the lower clutch body 30. As a result, the brake member 26 receives the frictional force corresponding to the rotation speed of the upper clutch body 32, the rotation speed of the upper clutch body 32 is suppressed, and the damper is gently closed.

Therefore, the clutch-equipped drive device can also prevent excessive wear caused by the idling of the reduction gear train 8 via the output shaft 9 when the damper is closed, and the damper can be prevented. Does not generate a large amount of noise or vibration due to the violent closing, and thus the operation is elegant and the luxury can be enhanced. Further, according to this clutch-equipped drive device, since an AC type solenoid is used as the solenoid for performing the clutch connection operation, a converter for converting an AC power supply into a DC as in the conventional case is not required, and therefore, The structure of the device can be simplified and the number of parts can be reduced.

At this time, as a result of using the AC type solenoid, the attraction force to the movable body 6A is reduced, but since the clutch teeth 30B and 32B are arranged on the outer peripheral side of the brake member 26, the rotation is reduced. Axis and clutch teeth 30 above
If the driving torque T (= L × F ₂ ) of the upper clutch body 30 is the same as the conventional one, the pressing force F acting on the inclined surface of the clutch teeth is increased.
Is smaller and the upper and lower clutch bodies 30, 32
The inclination angle of the inclined surfaces of the clutch teeth 30B and 32B engaging with each other is 5 ° or more and less than 40 °, which is set to a steeper angle closer to the contacting / separating direction than the conventional one. As shown in FIG. 5, the driving force of the lower clutch body 30 reduces the upward component force F ₁ of the pressing force F that acts on the clutch teeth 32B of the upper clutch body 32 from the inclined surface of the clutch teeth 30B. Since the force that pushes upward is relaxed, it is possible to prevent the clutch teeth from being disengaged from each other and the clutch from being disengaged.

[0024]

As described above, claim 1 or 2
According to the clutch-equipped drive device of claim 1, the driving force of the first clutch body reduces the force that pushes the second clutch body upward, and the mutual engagement of the clutch teeth is released. It is possible to prevent the clutch from being disengaged, so that an alternating current solenoid having a poor magnetic attraction can be used as the solenoid, and the structure of the entire apparatus can be simplified and the number of parts can be reduced. In this case, claim 2
According to the invention described in (1), smoothening of engagement / disengagement of the clutch teeth is not sacrificed, and further, the above-mentioned upward component force can be sufficiently reduced, and a more excellent effect can be obtained.

Moreover, by the clutch is arranged e Bei the brake member for preventing an abrupt rotation during idling of the second clutch member and the clutch teeth on the outer peripheral side of the braking member, an output In addition to being able to prevent excessive wear caused by the shaft suddenly spinning, and preventing the damper from closing vigorously and generating large noise and vibration, in addition to the above-mentioned clutch teeth, It is possible to reduce the pressing force acting on the inclined surface to reduce the upward component force that tends to push up the second clutch body .

[Brief description of drawings]

FIG. 1 is a plan view showing a lower clutch body in an embodiment of a drive device with a clutch of the present invention.

FIG. 2 is a vertical sectional view of FIG.

FIG. 3 is an enlarged cross-sectional view showing a meshing portion of clutch teeth of the lower clutch body and the upper clutch body of FIG.

FIG. 4 is a vertical sectional view showing a conventional drive device with a clutch.

5 is a vertical sectional view showing a clutch portion of FIG. 4. FIG.

FIG. 6 is a plan view of FIG.

FIG. 7 is an enlarged cross-sectional view showing an engagement portion of the clutch teeth of FIG.

FIG. 8 is a wiring diagram of the drive unit with the clutch shown in FIG.

[Explanation of symbols]

2 motor 3 rotor 6A movable body 9 Output shaft 24 Spring (biasing means) 26 Brake member 30 Lower clutch body (first clutch body) 32 Upper clutch body (second clutch body) 30B, 32B clutch teeth 30C, 32C inclined surface 33 Circumferential wall

   ─────────────────────────────────────────────────── ─── Continued front page       (56) References JP-A-6-213289 (JP, A)                 JP-A-1-151209 (JP, A)                 Actual Kaihei 5-34331 (JP, U)                 Actual public Sho 56-29933 (JP, Y2)                 Special table flat 2-503592 (JP, A)

Claims (2)

(57) [Claims] 1. A drive device with a clutch in which a clutch is interposed between a rotor of a motor and an output shaft, wherein the clutch includes a first clutch body connected to the rotor of the motor, and the output. A second clutch body that is connected to the shaft and is provided so as to be able to come into contact with and separate from the first clutch body, and is interposed between the first and second clutch bodies to form the first and second clutch bodies. And a solenoid driven by an AC power source for causing one clutch body to approach the other clutch body, and the first and second clutches. Clutch teeth that engage with each other when approached by the solenoid are formed on the facing surfaces of the body, and the inclined surfaces of the clutch teeth that engage with each other and the parallel direction to the contact / separation direction on the inclined surface. The angle between the reference line is 5 ° or more and less than 40 ° , and
A circumferential wall portion is formed on the first clutch body.
If an annular brake member is placed inside the peripheral wall,
At the outer periphery of the second clutch body, project radially outward.
It engages with the above-mentioned brake member by centrifugal force when idling.
A protrusion that presses the brake member against the circumferential wall.
The clutch teeth are formed on the outer circumference of the circumferential wall portion.
A drive device with a clutch, which is formed on the side . 2. The drive device with a clutch according to claim 1, wherein the angle is in the range of 10 ° to 25 °.