JPH0640863B2 - Clutch mechanism of mobile body with self-propelled function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is incorporated in a moving body having a self-propelled function, such as a self-propelled floor-moving type vacuum cleaner, etc. The present invention relates to a clutch mechanism for switching.

[Conventional technology]

For example, in the case of a floor moving type vacuum cleaner, casters and rollers for moving the floor are provided in front of and behind the main body, and by pulling a hose connected to the main body, the caster roller and the rollers as the rear wheels are rotated and the floor is moved. Although it moves on the surface, in this case, a considerable operating force is required to move the cleaner body depending on the state of the floor surface.

Therefore, in order to reduce the operating force of a moving body such as the electric vacuum cleaner, an attempt has been made to equip the moving body with a small motor and rotationally drive the roller by this motor.
In the case of a moving body with such a self-propelled function, a small motor is usually used by being integrated with a speed reduction mechanism of about 1/100, so if you want to move it manually when the power is removed, etc. The no-load torque is expanded, the rotation of the roller becomes heavy, and a large operating force is required. For this reason, conventionally, a clutch mechanism is interposed between the motor and the roller so that the motor and the roller can be separated when the motor is stopped.

As a clutch mechanism used for such a purpose, for example, a mechanical friction clutch, an electromagnetic clutch, a one-way clutch, or the like conventionally used in an automobile or the like can be cited.

[Problems to be Solved by the Invention]

However, when the above-described known clutch mechanism is applied to a moving body having a self-propelled function, for example, a mechanical friction clutch requires an operation from the outside for switching, and
With an electromagnetic clutch, external operation is unnecessary, but the dimensions are too large. Further, in the case of a one-way clutch, although downsizing is possible, only one direction can be switched, so it is unsuitable for this type of moving body that needs to be reciprocally moved back and forth. It was insufficient to achieve such an objective.

The present invention has been made to solve the above-mentioned conventional problems, and is a mobile body having a self-propelled function which can be automatically switched, can be downsized, and can be bidirectionally disconnected from the load. It is an object of the present invention to provide a clutch mechanism suitable for use in the.

[Means for Solving the Problems]

In order to achieve the above object, a clutch mechanism of a moving body having a self-propelled function of the present invention is configured such that the output of a motor driven by a drive source and controlled by a motor switch is differentially applied to a driving roller mounted on the moving body. A connecting wheel that transmits through a gear, a cam member that is integrally attached to the output shaft of the motor in a state of facing the connecting wheel with a gap, and a thrust direction between the cam member and the connecting wheel. A cam member provided with a displaceable clutch member, an urging means for urging the clutch member toward the cam member side, and a rotational resistance applying means for imparting rotational sliding resistance to the clutch member, A cam follower is provided on one of the opposing surfaces of the member and the clutch member, and the other of the surfaces is brought into contact with the cam follower at the start of rotation of the motor in the moving direction of the moving body to connect the clutch member. A cam surface to be displaced to the side and a first engaging portion that locks the cam follower in the same direction as the rotation direction at the displacement position of the clutch member, while one of the facing surfaces of the connecting wheel and the clutch member. When the engaged portion is provided on the other side and the other side is engaged with the engaged portion in the same direction as the rotation direction, and the link wheel rotates relative to the motor in the traveling direction of the moving body. The present invention is characterized in that a second engagement portion that rotationally displaces the clutch member relative to the cam member is provided.

The motor may be configured to rotate in a direction opposite to the traveling direction for a certain period of time after the motor has finished rotating in the traveling direction.

[Work]

With the above configuration, at the same time when the motor starts rotating, the motor is engaged with the driving roller via the clutch member to rotate the driving roller. Also, after the motor stops, the rotation of the roller following the inertial running of the moving body causes the engagement between the connecting wheel and the clutch member to be disengaged, so that the automatic operation is performed and the load can be disengaged in both directions. is there.

Further, when the motor rotates in the traveling direction of the moving body and then rotates in the opposite direction for a certain period of time, the inertial force due to the inertial traveling of the moving body is small, and the coupling wheel and the clutch due to the rotation of the drive roller are small. Even if the engagement with the member is not sufficiently separated, the motor can be reversely rotated to forcibly separate the member, so that a reliable operation can be obtained.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings. 1 to 3 show a clutch mechanism according to this embodiment. In these figures, (1)
Is a small DC commutator motor in which the reduction mechanism (2) is integrally provided.

(3) is a disc-shaped cam member having a cylindrical shaft portion (3a) protruding from the central portion to one side, and the cylindrical shaft portion (3a)
Is inserted into the output shaft (1a) of the motor (1), and the output shaft (1a) is fastened to the output shaft (1a) by a fixing screw (4).
It is integrally fixed to (1a).

Reference numeral (5) denotes a clutch member, which is slidably fitted to the cylindrical shaft portion (3a) of the cam member (3) with one surface thereof closely facing the cam member (3).

(6) is a connecting wheel for transmitting the output of the motor (1) to a driving roller (not shown) of a moving body (not shown), and a gear wheel on the outer circumference.
(6a) is formed and is rotatably fitted to the cylindrical shaft portion (3a) of the cam member (3) so as to face the other surface of the clutch member ((5)). ) And the fixing screw (4), a first compression spring (7) is interposed, and the first compression spring (7)
The connecting wheel (6) is constantly urged by and is pressed against the step portion (3b) provided on the cylindrical shaft portion (3a) of the cam member (3).

Further, a second compression spring (8) as an urging means is interposed between the opposing surfaces of the coupling wheel (6) and the clutch member (5), and the clutch member (5) is the second compression spring. Cam member by (8) (3)
It is constantly biased toward the side.

Further, the clutch member (5) is constantly provided with rotational sliding resistance by the rotational resistance application means (9). That is, the rotation resistance applying means (9) is a clutch member formed in a short cylindrical shape.
A sliding member (9a) made of felt or the like facing the outer peripheral wall (5a) of (5), and a short cylindrical clutch case (10) accommodating the sliding contact member (9a) and the clutch member (5). And a leaf spring (9b) interposed between the leaf spring (9b) and the leaf spring (9b) for constantly pushing the sliding contact member (9a) against the outer peripheral wall (5a) of the clutch member (5). The clutch member (5) is provided with rotational sliding resistance.

Further, a pair of U-shaped grooves (11) are formed in a notch shape in a flange portion (10a) formed on the inner circumference of one end of the clutch case (10), and the U-shaped groove (11) is formed. The clutch case (10) is slidable in the thrust direction along the protrusions (12), but not rotatable, by fitting a pair of protrusions (12) integrally formed on the motor case. It is supported by the motor case. (10b) is a connecting wheel of the clutch member (5)
It is a clutch lid that abuts a surface facing (6) and covers the opening of the clutch case (10).

On the surface of the cam member (3) facing the clutch member (5), four cam followers (13) are provided so as to project at four positions having different phases by 90 ° in the circumferential direction. Further, on the surface of the clutch member (5) facing the cam member (3), a cam surface (14) corresponding to the cam follower (13) and a first engaging portion continuous with the cam surface (14).
(15) is projected. Of these, the cam surface (14) is the motor
When (1) starts rotating in the traveling direction of the moving body shown by the arrow (a) in FIG. 3, it comes into contact with the cam surface (14) and the clutch member
The first engagement portion (15) engages the cam follower (13) in the same direction as the rotation direction at the position where the clutch member (5) is displaced, and is for displacing (5) to the connecting wheel (6) side. It will stop. The cam surface (14) is set so that the clutch member (5) is displaced relative to the cam member (3) by about 1 to 3 mm in the thrust direction.

On the other hand, on the surface of the clutch member (5) facing the connecting wheel (6), claw-shaped engaged parts (16) are provided at four locations in the circumferential direction which are different in phase by 90 °. Also, the connecting wheel (6)
On the surface facing the clutch member (5), the engaged portion (16)
Corresponding to the above, a second engaging portion (17) and an inclined surface (17a) continuous with the second engaging portion (17) are provided. Of these, the second engaging part
(17) is engaged with the engaged portion (16) in the same direction as the rotation direction,
When the coupling wheel (6) rotates relative to the motor (1) in the traveling direction of the moving body, the clutch member (5) is rotationally displaced relative to the cam member (3). In addition, the inclined surface (1
7a) guides the clutch member (5) toward the cam member (3) in the thrust direction by the sliding contact of the engaged portion (16).

Next, the operation of the above configuration will be described. When the motor (1) starts rotating from the state shown in FIG. 3, that is, the clutch member (5) is disengaged from the coupling wheel (6), the clutch member The cam surface (14) of (5) is the cam follower (1) of the cam member (3).
By displacing along 3), the clutch member (5) is displaced in the direction shown by the arrow (a) in FIG. 3, and the cam follower (13) engages with the first engaging portion (15). At this time, the rotational sliding resistance to the clutch member (5) by the sliding contact member (9a) is changed by the cam surface (14).
Since the component force in the rotation direction generated in the above is canceled to make only the component force in the thrust direction, and the clutch member (5) can move in the thrust direction together with the sliding member (9a) and the clutch case (10) without resistance. It is possible to instantly and reliably perform displacement.

When the cam follower (13) and the first engaging portion (15) are engaged with each other, the clutch member (5) rotates while slipping between it and the sliding contact member (9a), and the clutch case (10) has a convex portion ( 12) It stops at the position where it is slidingly displaced above.

The clutch member thus displaced in the thrust direction
In (5), the engaged portion (16) engages with the second engaging portion (17) of the connecting wheel (6), whereby the output of the motor (1) is driven by the driving roller via the connecting wheel (6). Is transmitted to.

Further, after the motor (1) stops, the drive roller continues to rotate due to inertia, so that the coupling wheel (6) rotates relative to the motor (1). The engaging portion (16) slides on the inclined surface (17a) of the connecting wheel (6) so that the connecting wheel (6) displaces the clutch member (5) relative to the cam member (3) and the thrust direction. On cam member (3)
It is moved to the side, and the engagement is released by the action of the second compression spring (8) to return to the initial state shown in FIG.

Furthermore, in this embodiment, the timer control circuit is configured to rotate in the reverse direction for a certain period of time after the motor (1) is stopped. Even when the relative rotation amount of the clutch is small, the relative displacement is forcibly generated to release the engagement state between the clutch member (5) and the coupling wheel (6).

An example of this timer control circuit will be described with reference to FIGS. 4 and 5. FIG. 4 is an actual wiring diagram, and FIG. 5 is a time chart. In these figures, the motor switch
When the (SW) is turned on, the contact (R1) of the relay (18) is closed and the motor (1) is rotated in the forward direction by the battery of the drive source.
Then, after rotating for the set time of the timer (T1), the contact (R1)
Opens and the motor (1) stops.

On the other hand, the contact (T2) is closed by the timer (20) set slightly longer than the timer (19), and reverse rotation is performed by reversely connecting the motor (1) to the battery (21) as a drive source. . The reverse rotation of this motor (1) turns off the switch (SW).
After that, the timer 22 continues until the set time elapses and then stops.

In this way, the clutch member (5) engages with the coupling wheel (6) at the same time as the rotation of the motor (1) and the driving force is transmitted,
The engagement is released at the same time as the stop of (1), and the clutch mechanism automatically operates only by turning ON / OFF the motor (1).

Next, an example in which the clutch mechanism having the above configuration is applied to an electric vacuum cleaner having a self-propelled function will be described with reference to FIGS. 6 and 7. FIG. 6 is a vertical sectional side view of the vacuum cleaner body, and FIG. 7 is a transverse plan view of the same. In these figures, (23) is a cleaner body as a moving body, and its outer shell is composed of an upper body (24) and a lower body (25).

Inside the upper body (24), a dust collecting part (26) is formed on the upper part and a battery accommodating part (27) is formed on the rear part. A lid (28) for covering the opening of the dust collecting part (26) is pivotally supported on the upper surface of the upper body (24) by a rotating shaft (29) so that the lid can be opened and closed. It is detachably held. Holder inside the dust collector (26)
The dust collecting bag filter (32) inserted in the (31) and the prefilter (33) made of non-woven fabric are stored. Further, a handle (34) is rotatably supported by a rotating shaft (35) on the upper end of the upper body (24).

A storage battery (21) is installed in the battery compartment (27), and the support shaft (3
It is held by a battery case (37) which rotates around 6).
Further, the dust suction fan motor (38) contacts the dust collecting part (26) by the upper body (24) and the lower body (25) through the front support rubber (39) and the rear support rubber (40). It is pinched and fixed in the state. Reference numeral (41) is a bumper made of an elastic rubber material, and is sandwiched between the upper body (24) and the lower body (25).

The lower body (25) has two rear wheels (43) and two caster rollers (43) as driving rollers, which are connected to the motor (1) provided with the clutch mechanism having the above-mentioned configuration via the differential gear (42). 44) is installed. A gear (42a) that meshes with the gear (6a) of the coupling wheel (6) is formed on the outer ring surface of the differential gear (42). Reference numeral (45) is a bearing of the differential gear (42).

The motor (1) uses the DC motor as described above,
It integrally has a speed reduction mechanism section (2) using a gear having a speed reduction ratio of 50 to 100.

On the other hand, as shown in FIG. 6, a cover plate (47) to which an air inlet packing (46) is fixed is attached to the lid body (28), and the lid body (2
8) and the contact plate (47), it is rotatable around the support shaft (48) around the vacuum cleaner body, and the spring (49) allows the intake hole packing (4
6) A displacement body (50) biased in the direction and a hose connection hole that is swingably supported around a support shaft (51) provided at the substantially central portion of the displacement body (50) in the longitudinal direction. (52) and are arranged. The hose connection hole (52) is fitted with an insertion stand (54) provided with a tight surface (53) with the intake hole packing (46).
5) is inserted. The tight surface (53) and the intake hole packing (46) are formed in a spherical shape centered on the support shaft (51).

Reference numeral (56) is a switch, which is a working surface (5
The switch (56) and the displacing body (50) constitute a motor switch (58), which is a micro switch fixed to the inner surface of the lid body (28) so as to face it.

Next, the operation of the above configuration will be described. The hose (55) spring (4
When the displacement body (50) is displaced in posture by pulling it in the traveling direction against the urging force of (9), the switch (56) is pushed and turned on to start the motor (1). As a result, the clutch mechanism is actuated, and the differential gear (42) and the rear
Rotate (43) to move the cleaner body forward. In this way, after the pulling force acting on the hose (55) has reached a position where it is smaller than the biasing force of the spring (49), the displacement body (50) is returned by the biasing force of the spring (49) and rotates. Then, the switch (56) is turned off, but the motor (1) continues to rotate for the set time of the timer and then reversely rotates for a certain period of time to rotate the clutch member.
The engagement state between the (5) and the connecting wheel (6) is released.

〔The invention's effect〕

As described above, when the clutch mechanism of the moving body having the self-propelled function of the present invention is used, the load and the starting motor can be disconnected automatically and bidirectionally by simply starting and stopping the motor. At the same time as driving, it can be moved lightly in the front-back direction during manual operation, which greatly improves usability.

In addition, since it can be made compact and compact, it can be easily incorporated into a mobile unit, has high practicality, and has great economic value.

[Brief description of drawings]

1 to 5 show an embodiment of a clutch mechanism according to the present invention. FIG. 1 is an exploded perspective view showing a clutch mechanism of a moving body, and FIG. 2 is a connecting wheel, a clutch member and a cam member. FIG. 4 is an exploded perspective view showing a state where the clutch member is taken out and viewed from the opposite direction, FIG. 3 is a cross-sectional view in a state where the clutch member is disengaged, and FIG. 4 is an actual wiring diagram of the timer control circuit, FIG. 5 is a time chart of the timer control circuit. 6 and 7 show an example in which the clutch mechanism according to the present invention is applied to an electric vacuum cleaner having a self-propelled function,
FIG. 6 is a vertical sectional side view, and FIG. 7 is a transverse plan view. (1) …… motor, (1a) …… output shaft, (3) …… cam member,
(5) …… Clutch member, (6) …… Coupling wheel, (8) …… Biasing means, (9) …… Rotation resistance giving means, (13) …… Cam follower, (14) …… Cam surface, (15) ... First engaging part, (16) ... engaged part, (17) ... second engaging part, (21) ... driving source, (23) ...
… Movement, (43) …… Drive roller, (58) …… Motor switch.

Claims (2)

[Claims] 1. A connecting wheel for transmitting an output of a motor driven by a drive source and controlled by a motor switch to a driving roller mounted on a moving body via a differential gear, and a gap between the connecting wheel and the connecting wheel. And a cam member integrally mounted on the output shaft of the motor in a state of facing each other, a clutch member disposed so as to be displaceable in the thrust direction between the cam member and the coupling wheel, and the clutch member A biasing means for biasing the member side and a rotation resistance applying means for applying a rotational sliding resistance to the clutch member, and a cam follower is provided on one of the facing surfaces of the cam member and the clutch member, and the other is provided on the other side. When the motor starts to rotate in the traveling direction of the motor, the rotation direction is brought into contact with the cam follower to displace the clutch member toward the coupling wheel and the displacement position of the clutch member. A first engaging portion that locks the cam follower in the same direction as the first engaging portion, and an engaged portion is provided on one of the facing surfaces of the coupling wheel and the clutch member, and the other is in the same direction as the rotation direction. A second rotational displacement of the clutch member relative to the cam member when the connecting wheel is engaged with the engaged portion and rotates relative to the motor in the traveling direction of the moving body. A clutch mechanism for a moving body having a self-propelled function, which is provided with an engaging portion. 2. A clutch mechanism for a moving body having a self-propelling function according to claim 1, wherein the motor is rotated in a direction opposite to the traveling direction for a certain period of time after the motor has finished rotating in the traveling direction.