JP2003113905A - Geared motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and inexpensive geared motor having brake force so as to endure high-frequency positive/reverse operation in input rotation and strong/weak loading to an output shaft. SOLUTION: A plate 22 is fixed to the output shaft 5. A first gear body 7 is rotatably fitted in the plate 22. An one way clutch 16 which restricts the first gear body 7 to one direction is mounted. A screw thread 6 is provided on the output shaft 5. A second gear body 8 is screwed with the screw thread 6. A motor pinion 13 engages with the second gear body 8. A buffer device 25 which exists among buffer material K (an urethane, a rubber and a resin), or energizes the buffer material K by a spring B is mounted on the side surface of the first gear body 7. Since the buffer device 25 absorbs shock loading, the geared motor 1 can be miniaturized, becomes inexpensive, can control frequent positive/reverse rotation accurately and does not require a wide installation space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a shock absorbing device for a screw type disc automatic braking mechanism to reduce the impact load due to the forward and reverse rotations of a motor, thereby lowering the rigidity of each component and reducing the size and noise. The present invention relates to a geared motor in which the shock applied to the load connected to the output shaft is reduced.

[0002]

2. Description of the Related Art Conventional geared motors with a screw type disc automatic brake are disclosed in Japanese Patent Application Laid-Open Nos. 6-263396 and 2-2.
There is a publication such as 70687, which is called a geared motor (hereinafter referred to as a geared motor), and by tightening a screw, transmission of an output shaft and braking by a ratchet are performed, and one direction of the output shaft is restricted by a ratchet mechanism. It's working.

This geared motor is adopted in a fishing machine, and is wound around a take-up drum attached to an output shaft to hang the fishing tackle in the sea so that the fishing line can be wound and unwound by rotation of the take-up drum. ing. The fishing tackle is wound around a take-up drum fixed to the output shaft of the geared motor through heavy lines such as nets and fishing hooks, so the load is applied only in one direction of the output shaft. Has become.

Since the rotation of the geared motor is instantaneously transmitted by tightening the rotation of the drive source with a screw, an impact load is applied to each transmission member at the time of starting and stopping, so that the transmission member is designed to have a higher strength or a reduction ratio. It had to be increased, and both were large geared motors that were heavy. Further, the fishing line wound around the geared motor is subjected to an impact load due to the abrupt rotation of the motor, and there is a risk of cutting the fishing line unless the fishing line having high rigidity is used.

The rotation of the geared motor at the fishing ground is
Since complicated winding and unwinding operations are performed to catch fish, frequent forward and reverse rotations and sudden rotations and sudden stops are performed. The braking operation of this geared motor can be instantaneously stopped or rotated by a screw action, but smooth and fast hoisting and rewinding cannot be performed, and a control device for it is provided. In this method, the rotation range of the drive motor is spread and controlled.

[0006]

In the conventional geared motor, since each part secures the strength against the impact load, it is heavy and expensive. The rotation operation also requires the rotation control of the drive source motor, and the rotation control cannot be performed by the manual operation of turning the drive source switch on and off. In order to control the rotation, it is necessary to operate a control device with an inverter, a sequencer, a pressure valve of an air motor, etc., and a complicated pattern is incorporated in the hoisting and rewinding work of the fishing line necessary for fishing, and the electronic member The installation location also needed to be devised to avoid the influence of sea breeze, which made the operation complicated and caused a failure, making it expensive to install.

Moreover, for the brake of the geared motor,
Since there is a ratchet mechanism, there is a problem that the rattling and claw engagement noise becomes a noise, and a backlash with a large gap between the ratchet and the claw meshes, resulting in poor responsiveness and relying on a motor control method. INDUSTRIAL APPLICABILITY The present invention can be miniaturized by reducing the impact load of each component of the geared motor by providing a shock absorber on the brake of the conventional geared motor, and it is possible to reduce the reduction ratio and enable high rotation, and to reduce the output shaft. The object of the present invention is to provide a small and inexpensive geared motor in which the control device can perform smoother rotation, the control device can perform more complicated rotation with higher accuracy, and the problem of ratchet noise is solved.

[0008]

According to the present invention, a plate is fixed to an output shaft, a first gear body is rotatably fitted into the plate, and a one-way clutch is meshed with the first gear body. A geared motor in which a threaded portion is provided on the circumference of the output shaft, a second gear that is screwed into the threaded portion is provided, and a motor pinion of the motor is meshed with the second gear. On the side surface, a shock absorber is provided on at least one side between the adjacent plate and the second gear.

According to the second aspect of the present invention, the shock absorber is configured such that urethane, rubber, and resin are interposed on the side surface of the first gear body, and the plate and the side surface of the adjacent plate and the second gear can be pressed against each other. In the invention of claim 3, a spring is arranged on the side surface of the first gear body, and urethane, rubber, and resin are brought into abutting contact with each other by the urging force of the spring, so that it is placed between the adjacent plate and the second gear. It is sandwiched so that it can be pressed into contact.

According to a fourth aspect of the invention, the side surface of the first gear body provided with the shock absorber is provided on one side or both sides. In the invention of claim 5, a pin is fixed to one side surface of the second gear and a stopper fixed to the output shaft is provided, and when the second gear moves in the separating direction from the first gear body, the pin is a stopper. And the second gear and the output shaft rotate at a constant speed.

Next, the structure of the technical idea other than the claims that can be understood from the embodiment of the present invention will be described together with its effects.
In the sixth aspect of the present invention, two types of cushioning forces are generated by setting the cushioning material and the spring force interposed on both sides of the first gear body to be different from each other, and the frictional action and the sliding action are set. It has the effect of being able to pursue smoothness according to the application.

According to the seventh aspect of the present invention, the speed reducer is built in the side surface of the second gear (not shown), and is driven by contacting the second speed reducer before the first gear body contacts the second gear. The rotation of the motor is transmitted to the output shaft. Then, when the first gear body and the second gear are brought into contact with each other, the rotation speed at the time of winding and the rotation speed at the time of rewinding can be changed by the mechanism for transmitting the rotation different from the speed ratio. Therefore, there is an effect that the impact force is further reduced, a heavier load can be wound up, and there is an effect that the size is reduced.

According to the first aspect of the present invention, the shock load does not act on each member from the input to the output by the shock absorber,
The one-way clutch has the effect of preventing noise. In the configuration of claim 2, since the output shaft is smoothly rotated by the shock absorber, there is an action of reducing the impact force on the load side.

According to the third aspect of the present invention, since the shock absorber is provided with the spring, the driving force of the motor can be smoothly transmitted by the urging force of the spring. The structure of claim 4 has an effect that the impact force can be reduced to half on both sides as compared to one side.

In the structure of claim 5, since the allowable range of the screw can be restricted, there is an effect that the screw can be rotated at a constant speed when the brake is released.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A shock absorber 25 is provided in a screw type disc automatic braking mechanism of the present invention to transmit a torque as required to a driving force of a winding drum 4 provided on an output shaft 5, A concrete embodiment will be described with reference to FIGS.

FIG. 1 is a side view in which the winding drum 4 is fixed to the geared motor 1 and the fishing line 20 is wound, as seen from the Y side. The drive source is the motor 3, and the motor pinion 13 meshes with the pinion gear 11 to rotate the pinion shaft 12. Both ends of the pinion shaft 12 are rotatably supported by the bearings 17c on the case body 2, and the pinion gear 11 and the third gear 10 are fixed and connected to the rotation of the motor 3. The third gear 10 transmits meshing rotation to the second gear 8.

The second gear 8 has a female screw 24 at its center,
It is screwed into the male screw 23 of the screw portion 6 of the output shaft 5, and is screwed forward or backward on the screw portion 6 depending on the rotation direction. The output shaft 5 is
Bearings 17a and 17b having both shafts supported by the case body 2
The plate 22, the screw portion 6 and the stopper 9 are fixed rotatably by means of, and the winding drum 4 is fixed at one end. The plate 22 is provided with a small-diameter shaft portion and a large-diameter disk, and is fixed to the output shaft 5 with a key 18, and the first gear body is rotatably attached to the shaft portion.

The first gear body 7 is made up of adjacent plates 22.
While being held by the second gear 8 and the second gear 8, they are brought into contact with and separated from each other by screwing the screw portion 6. Since the winding drum 4 is always loaded in one direction, the output shaft 5 is trying to rotate in the same direction.

When the rotation direction is the R direction, the screw direction is also the R screw. When the motor 3 is stopped, the second
Since the gear 8 is also stopped, the output shaft 5 is the winding drum 4
A rotational force is applied in the R direction by a load applied to the second gear 8 to screw it to press the first gear body 7 against the plate 22. Then, the first gear body 7 also tries to make R rotation, but as described later, the first gear body 7 is rotated by the one-way clutch 16.
Since the R rotation is restricted, the output shaft 5 does not rotate, so that the fishing line 19 is stopped.

Referring to FIG. 2 as viewed from the X side, the difference from the Y side is that the pinion shaft 12 is replaced by the brake shaft 15 and the bearing 17c is replaced by the one-way clutch 16.
I have to. Therefore, the one-way clutch 16 is installed so as to regulate the L direction of the brake shaft 15. The fourth gear 14 fixed to the brake shaft 15 is a meshed first gear body 7
R rotation will be restricted. When the rotation of the first gear body 7 is stopped, the first gear body 7 moves to the second gear 8 and the plate 22.
Since the output shaft 5 is clamped and integrated with each other, the output shaft 5 cannot rotate and the brake is applied.

When the motor 3 rotates L in the direction in which the fishing line 19 is wound up, the first gear body 7 moves the output shaft 5 as described above.
It is possible to wind up the winding drum 4 by rotating the fourth gear 14 in the R direction. On the contrary, when the winding drum 4 is rewound, if the rotation of the motor 3 is reversed, the second gear 8 rotates L to screw the screw portion 6 backward (toward the motor side).
Therefore, it is separated from the first gear body 7 that was held.

The rewinding operation will be described with reference to FIG. 3. As described above, the gap is generated between the plate 22 and the second gear 8, so that the plate 22 starts to slide and the restricted R rotation of the first gear body 7 is released. , Falls by the force of the load applied to the winding drum 4 and reverses. At that time, the second gear 8 decelerates and transmits the rotation of the motor 3, and the winding drum 4 reverses the R rotation when the rotation speed of the output shaft 5 is constant.

When the rotation at a constant speed is stopped, the rotation of the winding drum 4 is faster than the rotation of the second gear 8.
When the speed is faster, the screw portion 6 causes the second gear 8 to be screwed to hold the first gear body 7, and therefore the first gear is restricted in the R direction, so that the brake operation is performed and the winding drum. The rotation of No. 4 is reduced to the same as that of the second gear 8 and then it is rotated at a constant speed.

When the rotation of the second gear 8 is faster than that of the winding drum 4, the pin 26 protruding to one side of the second gear 8 in the screw retraction direction is keyed to the output shaft 5 by the screw retraction of the second gear 8. It engages with the stopper 9 fixed at 18, and rotates at a constant speed. FIG. 4 shows the arrangement of the shafts and gears housed in the case body 2. One of the pinion shafts 12 transmits the rotation of the motor pinion 13 from the pinion gear 11 to the third gear 10 to screw it onto the output shaft. Have been combined. The other brake shaft 15 is connected to the fourth gear 14 from the first gear body 7 and regulates the rotation direction.

In FIG. 5, the cushioning material K is interposed on one side of the first gear body 7 and the elastic material D for pushing out the cushioning material K is inserted. The second gear 8 contacts the first gear body 7. Then, the cushioning material K of the first gear 7 is brought into pressure contact with the plate 22 to cause a slip, and the driving force of the motor can be transmitted softly.

The cushioning material K is made of urethane / rubber / resin material and made oil resistant, and is provided with a wear resistant metal / lining material on the contact surface side of the second gear 8 / plate 22. The elastic material D has different compression forces depending on the magnitude of the load applied to the output shaft, and the difference in the protrusion amount of the cushioning material K causes a constant contact state, so that the transmission torque does not suddenly fluctuate. Can be connected smoothly.

The shock absorber 25 shown in FIG. 6 will be described.
A buffer material K is provided circumferentially on both side surfaces of the first gear body 7,
The spring B pushes the cushioning material K apart from the inside. Second
When the gear 8 receives the driving force and approaches the first gear body 7,
The cushioning material K comes into contact with the plate 22 and the second gear 8 to start gradually transmitting the driving force.

Since the position of compression of the spring B differs depending on the load condition of the output shaft 5, the first gear body 7 absorbs the strong and weak load applied to the fishing tackle 20 by the urging force of the spring B, and
Since the rotation from the gear 8 to the plate 22 can be performed softly, smooth transmission according to the load can be performed.

When the output shaft 5 is rotated R and the fishing tackle 20 is dropped, when the second gear 8 is rotated R by the rotation of the motor 3, the second gear 8 is rotated by the action of the screw portion 6 and is moved in the direction away from the plate 22. To do. Although the first gear body 7 is regulated by the one-way clutch 16 and does not rotate, the shock absorber 25 is spread to the side surface and acts to stop the rotation of the plate 22 and the second gear 8, but is released when the separation distance increases. , The output shaft 5 rotates in the R direction where the braking force is lost and a load is applied.

The second gear 8 is screwed back by the rotation of the motor 3 and moved to the stopper 9 side, and the stopper 9 of the second gear 8 is moved.
The pin 26 is projected to the side, and the stopper 9 and the pin 2
6 is engaged, the second gear 8 and the output shaft 5 rotate at a constant speed, and the fishing tackle 20 is dropped. When the rotation of the output shaft 5 is faster than the rotation of the second gear 8, the second gear 8 is screwed by the screw portion 6 and abuts on the first gear body 7.

The first gear body 7 is a one-way clutch 16
Since the R rotation is restricted by, the second gear 8 comes into contact with the second gear 8 to act as a brake to stop the rotation of the output shaft 5. FIG. 7 illustrates an example adopted in the electric suspension device 50. A plurality of the electric fishing gears 50 are mounted on a boat such as a fishing boat and fixed to a ship floor 53, and a rod 52 is projected from the boat toward the sea surface. The rod 52 is adjusted so that the disc-shaped rod lifting device can rotate with a constant load.

When a command for suspending the fishing tackle 20 on the seabed 56 is issued from the operation panel 54, the rod 52 is lowered by the weight of the fishing tackle 20, and the drive of the geared motor 1 is rotated in the direction of releasing the first gear body 7. The winding drum is rewound and the fishing line 19 is sent out. When the fishing tackle 20 reaches the seabed 56,
Since the load applied to the rod 52 is eliminated, the rod 52 is lifted up and rotated as shown by the imaginary line in FIG.
The rotation of the geared motor 1 is stopped by the sensor attached to 2.

Although there are various kinds of fishing tackle 20 depending on the type of fishing, the control device 55 stores the repeated winding / rewinding of the fishing line 19 or the gradual forward / reverse rotation, but the bending and the angle of the rod 52 cannot be used. Due to the subtle rotation of the geared motor and the soft connection of the shock absorber 25, the fishing can be succeeded by further improving the subtle rotation.
Further, instead of the control device 55, it is possible to wind and rewind manually.

[0035]

According to the first aspect of the present invention, the one-way clutch is used to eliminate the noise, and the soft connection by the shock absorber can reduce the rigidity of the member, resulting in a miniaturized geared motor. There is an effect that can be done.
In the invention of claim 2, since the elastic body can make the transmission soft, the impact load can be reduced and each member can be downsized, the reduction ratio can be reduced and the speed can be increased, and the weight and cost can be reduced.
It has the effect of easy installation. According to the invention of claim 3,
Since the spring biasing force that matches the transmission force to the output shaft load works, it is possible to perform soft hoisting and rewinding.
There is an effect that a small geared motor can be obtained without destroying each transmission member. In the invention of claim 4, the effect on only one side can be further increased, and even if the motor is operated in the forward and reverse directions frequently, it is received on both sides, so that there is an effect of excellent durability. According to the invention of claim 5,
When the output shaft is rewound, it can be transmitted in the same way as the motor rotation, which has the effect of not damaging the screw part.

[Brief description of drawings]

FIG. 1 is a Y-side sectional view illustrating a geared motor of the present invention.

FIG. 2 is a sectional view on the X side for explaining a geared motor.

FIG. 3 is a mechanism explanatory view illustrating a screw brake mechanism.

FIG. 4 is a front view showing gear positions of a geared motor.

FIG. 5 is a side view showing the first embodiment of the cushioning material.

FIG. 6 is a side view showing a second embodiment of the cushioning material.

FIG. 7 is a side view of an electric fishing gear equipped with a geared motor, which is an example mounted on a fishing boat.

[Explanation of symbols]

1 Geared motor 2 Case body 3 motor 4 winding drum 5 output shafts 6 screw part 7 First gear body 8 second gear 9 stopper 16 one-way clutch 22 plates 25 shock absorber 26 pin D elasticity K cushioning material B spring

Claims (5)

[Claims] 1. A plate fixed to an output shaft, a first gear body rotatably fitted to the plate, a one-way clutch meshing with the first gear body, and a screw portion on the circumference of the output shaft, A second gear screwed to the threaded portion and a motor meshed with the second gear constantly apply a load to one direction of the output shaft, so that the output shaft is loaded in the screw direction. A one-way clutch for restricting a direction opposite to a screw direction is fitted and configured, and a side surface of the first gear body is provided with a shock absorber on at least one side between an adjacent plate and a second gear, and a guard motor. . 2. The geared motor according to claim 1, wherein the shock absorber is an elastic body which is a contact material with urethane, rubber and resin material interposed. 3. A spring is provided on the side surface of the first gear body, and the urging force of the spring causes the urethane / rubber / resin to be pressed against the intervening contact material so as to project, and at least the adjacent plate and the second plate. The geared motor according to claim 1, wherein the geared motor is provided on either side of the gear so as to be capable of pressure contact. 4. The side surface of the first gear body provided with a shock absorber,
The geared motor according to claim 1, wherein the geared motor is provided on one side or both sides. 5. A pin is fixed to one side surface of the second gear that is not in contact with the first gear body, and a stopper is fixed to the output shaft so that the second gear moves in the direction away from the first gear body. The geared motor according to claim 1, wherein the pin engages with the stopper so that the second gear and the output shaft rotate at a constant speed.