JPH0140369Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rotation conversion unit, and more specifically, to an improvement of a rotation conversion unit to convert rotational torque applied to an input/output shaft into linear motion, and vice versa. Regarding.

As is well known, in a traveling body that runs on a road surface or track surface, a device that conveys a plate-like object, or any other moving device, the movement changes from one side that moves or is moved to the other side that is moved or moved. The power that makes this possible is transmitted. The transmission of force involves the conversion of linear motion into linear motion, and the conversion between rotational motion and linear motion. Various techniques have been proposed for these devices. However, most of the mutual conversion between rotation and linear motion is
One of the moving or moving parts is constructed as a wheel or roll rotated by an electric motor or the like, and is connected in line contact to the other of the moving or moving parts, and the movement is caused by the line contact frictional transmission. It is something that conveys.

Although this is a simple and practical means, since the contact between the wheel or roll and the other surface that is being moved or moved is a line contact, the frictional resistance therebetween is naturally limited. Therefore, there is a certain limit to preventing slips from occurring between the wheels or rolls and the opposing surface, and in the end, slips are likely to occur.

Therefore, in order to alleviate the above problem,
As proposed in Japanese Patent No. 20446, a structure has been proposed in which an endless band-like body is stretched between two wheels, and the surface of this endless band-like body is in contact with the surface of a linearly moving body.

In this case, the prior art endless strip was a caterpillar. For this reason, there is a gap between the caterpillar pieces, and it has been desired to improve the adhesion to the surface of the linearly moving body. In other words, it has been desired to increase the frictional resistance based on surface contact. However, conventional devices have specific specifications for specific uses, and are not rotary-linear motion mutual conversion devices that can be applied to a variety of applications. That is, it is not unitized and cannot be easily applied to various devices that require linear motion.

Therefore, the object of the present invention is to provide a mechanism in which, during mutual conversion between rotational motion and linear motion, the opposing surface that is linearly moved or moved is moved or moved by frictional transmission through surface contact. Needless to say, the object of the present invention is to provide a unitized rotary conversion unit that can be immediately assembled into the applied mechanism or device without having to design and manufacture it again when it is applied to various mechanisms or devices. In particular, by integrally molding the endless belt-like body from a flexible material, that is, by constructing it as an integrally molded product, it is easy to come into close contact with the surface of the linearly moving body over the entire surface, creating a large frictional resistance. The purpose is to convert rotational force into linear reciprocating motion without loss.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, 1 indicates the unit body, and one wheel 3 is placed inside a box-shaped casing 2 with one side open.
The other wheel 4 is rotatably arranged at a predetermined distance t from the wheel 3, and these wheels 3,
It is constructed by wrapping an endless band-like body 6 that frictionally contacts the mating surface 5 between the four sides.

To explain the above configuration in detail, first, one wheel 3 is arranged as follows. One side wall surface 2a and the other side wall surface 2 along the longitudinal direction of the casing 2
Bearing holes 7, 7 are formed in b, and these bearing holes 7,
Cylindrical supports 8, 8 are fixed to 7, and bearings 9, 9 are fitted on the outside of these supports 8, 8. On the other hand, protrusions 10, 10 for fitting into the center holes of the bearings 9, 9 are protrudingly provided on both the left and right sides of the center of the wheel 3. And these protrusions 1
0, 10 are fitted with ball bearings 9, 9, and the ball bearings 9, 9 are fitted and held within the supports 8, 8. At this time, a part of the circumferential surface of the wheel is exposed to the outside of the casing 2. This allows one wheel 3 to be attached to the casing 2.
The other wheel 4 can also be disposed in this manner so as to be rotatable within the casing 2.

Next, the input/output shaft 11 is connected to the one wheel 3 mentioned above. This input/output shaft 11 is arranged to rotate the one wheel 3 and to be rotated by the wheel 3, and is connected to the one wheel 3 in the following manner. That is, one wheel 3
A fitting hole 12 is formed at the center of the input/output shaft 11, and the input/output shaft 11 is fitted and fixed into the fitting hole 12. One end portion 11a of the input/output shaft 11 is caused to protrude outwardly from the casing 2. This is to facilitate connection with electric motors, engines, and other prime movers.

One wheel 3 and the other wheel 4 arranged in this manner are formed to have the same diameter, and engagement teeth 13, 13 are formed on the outer peripheral surface thereof over the entire circumference. This is formed to improve the engagement between the wheels 3 and 4 and the endless strip 6 when the endless strip 6 is wrapped around the circumferential surface, and these are also formed on the inner surface 14 of the endless strip 6. engaging teeth 1
Meshing teeth 15 corresponding to 3 and 13 are formed. This endless strip 6 is made of a flexible material such as synthetic rubber or a composite material of rubber and plastic, and it is preferable to insert a knitted material such as steel in the center to increase the tensile strength. can be made larger.

Next, 16 is a tension pulley, and the tension pulley 16 is always urged downward in the figure by a pressure spring 17. rotating shaft 18
The endless belt-like body 6 which is rotatably supported by the wheel and wound between one wheel 3 and the other wheel 4 is kept in tension at all times, and this endless belt-like body 6 is pressed against the mating surface 5. It has an effect.

The height H, length L, and width W of the unit main body 1 constructed as described above are various.
This is to make it easier to adapt the unit body 1 to the equipment to be used.

Next, the operation of this embodiment will be explained.

Since this rotation conversion unit is constructed as described above, it is possible to convert rotational torque input from the outside into planar linear motion. That is, a motor (also not shown) is connected to one end 11a of the input/output shaft 11 via a coupling (not shown). When this motor is rotated, the input/output shaft 11 is rotated.
Since one wheel 3 is fixed to this input/output shaft 11, this one wheel 3 is rotated. When one wheel 3 is rotated in this manner, the endless strip 6 wound around its circumferential surface is caused to travel. As mentioned above, the endless strip body 6 is attached to one wheel 3.
Since it is wrapped between the wheels 3 and 4 of the other side, it runs in a straight line between the wheels 3 and 4 of the other side. During this running, engagement teeth 13 are formed on the circumferential surfaces of one wheel 3 and the other wheel 4, and
The engaging teeth 13 are provided on the inner surface 14 of the endless strip 6.
Since meshing teeth 15 are formed to mesh with the wheels 3 and 4, slipping between the wheels 3 and 4 and between the endless strip 6 will not occur. So-called timing synchronization can be achieved.

When converted into linear motion in this way,
Not only can the contact area with the moving or moving mating surface 5 be made larger compared to the line contact type, but also compared to the endless strip of the caterpillar method, the entire surface of the endless strip is on the mating surface. Since they are in close contact with each other, frictional resistance can be increased. Therefore, the frictional resistance between them can be increased, and the endless strip 6 and the opposing surface 5
There are fewer slips between inputs, and input can be used effectively.

Also, as mentioned above, the height H of the unit body 1,
Since the dimensions of length L and width W are formed in various ways,
By selecting the optimum dimensions from among them, this unit can be easily attached to the device or mechanism to which it is applied. Therefore, when manufacturing devices, mechanisms, etc., it is possible to eliminate the time and effort required to design and manufacture the conversion device from individual parts.

This will be explained using some examples. That is, in the example shown in FIG. 5, the slider 20 having the load lifting mechanism 19 is
This is an example where it is arranged to make it stick out. When manufacturing this device, a unit main body of suitable dimensions is selected and fixed to the framework 23, and the endless strip 6 is brought into contact with the mating surface 5, which is the upper surface of the slider 20. By doing this, when the endless strip 6 is made to run, the slider 2
0 is made to run in one side direction 21 and the other side direction 22 and is made to protrude outward greatly, so there is no need to go to the trouble of manufacturing a rotation conversion unit from individual parts.

FIG. 6 shows an example of the arrangement in the load carrying device 24. When manufacturing this device, select a unit suitable for it, apply this unit to the load carrying device 24 so that the endless strip 6 faces the mating floor surface 25, and install the input/output means. Just connect. There is no need to go to the trouble of manufacturing from parts.

The example in FIG. 7 shows an example in which the wire 26 is disposed in a feeding device 27 for feeding the wire 26. In this case, if a pair of units 1 are prepared with the wire 26 in between, and a rotating means is connected to the input and output shafts, the feeding device 2
7 is composed.

The example shown in FIG. 8 shows an example in which the feed mechanism 30 is disposed in a feed mechanism 30 for feeding the plate material 29 to the press 28. This is substantially the same as the case shown in FIG. 7 above.

As described above, since the mechanism for converting rotational motion into linear motion is integrated into a unit, it can be easily adapted to various devices by assembling this unit.

Although this embodiment shows an example in which the meshing teeth 15 are formed only on the inner surface 14 of the endless strip 6, the meshing teeth 15 are also formed on the outer surface 31 of the endless strip 6.
A groove portion 32 as shown in the figure may be formed.

As detailed above, the present invention has one wheel 3 rotatably disposed in a box-shaped casing 2 whose one side is open, with a part of the circumferential surface exposed from the opening. The other wheel 4 is rotatably disposed at a predetermined distance from the wheel 3 and also has a part of its circumferential surface exposed through the opening surface. Between,
An endless band 6 is wrapped around which meshing teeth 15 are formed to engage with the engaging teeth 13 of each wheel, and an input/output shaft for driving the drive wheels 3 is further wound. The unit main body 1 is constructed by disposing the one end 11a facing the outside of the casing 2, and the input/output shaft 11 can be connected to a desired rotation means, and the endless strip 6 is It is a rotation conversion unit configured to be able to contact a linearly moving body, and the endless band-shaped body 6 is integrally molded from a flexible material that can be hung between the wheels 3 and 4. Compared to a caterpillar, surface contact with the object to be moved in a straight line is possible over the entire surface of the strip, which is closer to the surface and generates greater frictional resistance, so rotational force can be converted into reciprocating motion without loss. It is. In addition, the weight can be reduced, and there is no risk of damaging the opposing surface. Moreover, since the entire unit is made into a unit, when the unit is applied to various mechanisms, there is no need to design and manufacture it again, and to provide a unitized rotation conversion unit that can be immediately assembled into the applicable mechanism or device. It has various advantages such as

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view, and Fig. 3 is taken along line A-A in Fig. 2.
A cross-sectional view along the line, Figure 4 is also B-B in Figure 2.
A sectional view taken along the line, Figures 5 to 8 show examples of use, Figure 5 shows an example of use as a feeder for a slider in a cargo handling mechanism, and Figure 6 shows use as a drive device for a load carrying device. Figure 7 is a diagram showing an example of use as a wire feeding device.
FIG. 8 is a diagram showing an example in which the mechanism is used as a feeding mechanism for feeding a plate material to a press, and FIG. 9 is a partial side view showing a modification of the endless strip. In the figure, 1... unit body, 2... casing, 3... one wheel, 4... other wheel, 6...
... Endless strip, 11 ... Input/output shaft, 1
1a... One side end, 13... Engaging tooth, 14... Inner surface, 15... Engaging tooth, t... Predetermined interval.

Claims (1)

[Scope of claim for utility model registration] Inside the box-shaped casing 2, which is open on one side,
One wheel 3 is rotatably disposed with a part of the circumferential surface exposed from the opening surface, and a predetermined interval t is placed with respect to the wheel 3, and a part of the circumferential surface is also opened. The other wheel 4 is rotatably arranged while being exposed from the surface, and an endless band 6 is wrapped between these wheels 3 and 4, and further transmits rotational force to the one wheel 3. The input/output shaft 11 for
A is arranged facing the outside of the casing 2 to constitute the unit main body 1, and the input/output shaft 11
One side end 11a can be connected to a desired rotational force transmission means, and the outer circumferential surface of the endless strip 6 can be connected to a rotation conversion unit configured to be able to face a desired linearly moving body. ; The endless belt-shaped body 6 is composed of an integrally molded product made of a flexible material that can be stretched between the wheels 3 and 4, and the circumferential surface of the endless belt-shaped body 6 is Engagement teeth 13 formed in
13. A rotation conversion unit characterized in that meshing teeth 15 are formed to engage with the rotation conversion unit 13.