JPH0130684Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is applicable to belt transmissions, conveyor transfer machines,
The present invention relates to an improvement in a control drive device for a belt transmission that allows maintenance work such as belt replacement to be performed easily and quickly even when applied to load equipment such as a blower installed in a narrow space or a dangerous area.

[Conventional technology]

FIG. 3A shows a side view of the entire belt transmission to which a conventional speed change control drive device is applied. In the figure, 1 is a belt transmission, 2 is a main electric motor,
3 is a worm reducer, 4 is a geared motor consisting of a gear head 4a and a reversible motor 4b, 5
is a speed change controller, 6 and 7 are variable diameter pulley bodies, 8
9 is a transmitter, and 9 is a housing. As is clear from the figure, the power of the main electric motor 2 is applied to the output shaft 3a of the worm reducer 3 via the belt transmission 1, and is taken out as a variable speed output. However, conventional belt transmissions 1 of this type are overwhelmingly used indoors, such as in factories. For this reason, in order to suppress heat generation in the pulley body of the belt transmission section, the structure of the housing 9 is semi-closed, and the transmission controller 5 is also designed to be an open type, with each part being individually constructed.

Further, FIG. 3B also shows the configuration of a belt transmission with substantially the same speed change control drive mechanism devices 5a, 5b as in FIG. 3A. In this case, an example is shown in which the output shaft protrudes from the housing 9 in a direction opposite to that of the main motor 2.

〔problem〕

However, a major problem remains with the structure of the belt transmission 1 and the speed change controller 5. That is, the belt used in the belt transmission 1 is a consumable item and requires frequent replacement and maintenance, but in the configuration shown in FIG. , further removing the lid part 9a of the housing 9,
Subsequently, the pulley bodies 6, 7 must be disassembled, which is a very complicated operation, and the maintenance work is completely inefficient. This is due to the fact that the speed change controller 5 itself is installed completely separately from the housing 9, and the internal engagement type between the speed change controller 5 and the variable diameter pulley body 6, as well as the casing and housing of the speed change controller 5. This is due to the lack of consideration given to the mutual relationship with 9.

Also in FIG. 3B, maintenance work such as belt replacement requires almost the same disassembly work. especially,
In the example shown in Fig. 3B, if a load device with a wide flat surface such as a blower is directly attached to the output shaft, when removing the speed change controllers 5a and 5b, the input shaft must be placed in the axial direction as well as in the radial direction. Although this space is required, in reality, the load equipment is adjacent in the axial direction, so removal work may be impossible. Therefore, when replacing the belt,
In the end, the transmission main body 1 had to be removed from the load equipment (not shown), and then the transmission 1 had to be disassembled to perform the work, which was extremely complicated.

[Means for solving problems]

In the present invention, each device constituting the speed change control device is integrally assembled in a predetermined order, and moreover, the devices can be freely attached to and removed from the housing in the integrally assembled state. Furthermore, when attaching and detaching from the housing, it is configured so that it can be operated only in the radial direction around the axial center of the input rotating shaft, so that there is no need for any mounting operation in the axial direction of the input rotating shaft.

[Effect]

The speed change controller 5 having such an integrally assembled configuration is
It can be attached to the side wall of the belt transmission housing, and can be easily attached and detached by simply pulling out or pushing in the radial direction relative to the input shaft core through an opening in the side wall. As a result, when performing maintenance work such as belt replacement, there is no need to remove the belt transmission itself from the load equipment, making the work faster and more efficient.

Furthermore, when hoisting the sliding pulley, a large load is applied to the shift lever, and the load is applied from the shift lever to the support frame via the guide shaft and hoisting screw, and then to the support frame. Since the load is distributed and absorbed by the outer wall of the housing via the flange portion of the outer cover body, the speed change control operation can be performed stably.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a partial sectional view of a belt transmission equipped with a speed change control device of the present invention for speed change control of a variable diameter pulley device on the driven side of a known belt transmission.

In the figure, 10 is a housing of a belt transmission, and a flange portion 11 of a main electric motor (not shown) is attached above. Furthermore, the rotating shaft 12 of the main motor 11 is inserted into the room through the opening 13 through the flange portion 11, and a variable diameter pulley body 2 consisting of fixed and sliding pulleys 21 and 22 is inserted into the rotating shaft 12.
0 is attached in a cantilevered manner. The sliding pulley 2 is connected to the support shaft portion 25 of the fixed pulley 21.
As the sliding contact portion 26 of No. 2 slides up and down, a belt (not shown) held by the conical taper portion of each pulley 21 and 22 is moved between the pulleys 21 and 22.
The radius of the contact circumference is continuously changed.
As a result, the speed ratio of the belt transmission can be controlled.

Next, the configuration of the speed change control device 60 will be explained. The speed change control device 60 includes three parts, a circuit panel part 30, a frame part 40, and a shift lever support part 50, each of which is constructed as an integral assembly.

First, the circuit panel section 30 has a shape that protrudes from the housing 10 in this embodiment. A T-shaped panel 33 to which a circuit device 34 is attached is arranged in a space surrounded by an outer cover body 31 and an outer cover 32 for maintenance work from the outside. The circuit device 3 provided on the flat surface of this panel 33 in the outdoor direction
4 is composed of a phase advance capacitor 35, a potentiometer 36, a limit switch (not shown), and a shift position detection device 37 consisting of a rotation screw 37a and an adjustment piece 37b. on the other hand,
The rotation screw 37a is connected to the second power transmission device. In this embodiment, the second power transmission is the gear 3
8 and 19. This rotation screw 3
The rotational power of 7a is further transmitted to a pair of gears 37c, 37.
d to the potentiometer 36.

Next, the frame portion 40 will be explained. Frame part 4
0 is a frame 41 having a special shape to form a space for housing a geared motor in which a motor 15 and a gear head 16 are integrated.
It is made up of. The frame 41 is made of sheet metal and has the following configuration. That is,
A flange portion 41d has a mounting hole 41a for installing the outer cover body 31 and a through hole 41b for installing the above-described integral assembly on the wall surface of the transmission housing 10 via the outer cover body 31.
and a geared motor installation space 41e formed by protruding the inside of the flange 41d into a dish shape;
A flat part 41f that holds the support frame 42 of the shift lever 51, and this flat part 41f and the flange part 4.
1d and a connecting portion 41g that connects the flange portions 1d and transmits the bending moment applied to the flat portion 41f to the flange portion 41d. Note that the flat part 33 of the T-shaped panel 33
Instead of c, the flange portion 41d and the plane portion 41f are perpendicular to each other, and the geared motor 1 is located at the center.
Connecting portion 41g and flat portion 41 of the motor installation portion having holes penetrating output shafts 5 and 16
The panel 33 may be configured to protrude from f, and instead of being T-shaped, the panel 33 may be flat. Further, in this case, it is also easy to support the flat panel on the frame 41 side. A gear 19 and a sprocket 17 for the first and second power transmitters are installed on the output shaft of the geared motor, and the gear 19 further meshes with a gear 38 at the rear to form the second power transmitter. are doing. Further, the sprocket 17 is interlocked with the sprocket 18 via a transmission body, forming a first power transmission machine. Note that gears may be used here.

Further, the shift lever support portion 50 is attached to the frame 41.
A support frame 42 fixed to the back surface of a flat part 41f by four screw parts 43, a hoisting screw 54 installed inside the support frame 42, and guide shafts 57a, 57b.
and a shift lever 51. The winding screw 54 and the guide shafts 57a and 57b form a lifting device for the shift lever 51. This shift lever 51 is formed into a U-shape or a Y-shape as a whole, and has through-holes in which rubber seals (not shown) are installed at the upper and lower ends of the inside, respectively, and pass through the guide shafts 57a and 57b. ing. The center of one end of the shift lever 51 is screwed into a winding screw 54 via a pusher 53 which is internally threaded. The other free end is bifurcated into a Y-shape or a U-shape, and an engagement end 58 is formed at the tip. Since the above-mentioned sprocket 18 is installed on the winding screw 54, the motor 15
The shift lever 51 slides up and down on the hoisting screw 54 and the guide shafts 57a and 57b according to the direction of rotation of the shift lever 51, and the distal engagement end rises, causing the sliding pulley 22 to slide upward. Shift control is performed by. Note that the U-shaped engagement end 58 of the shift lever 51 is connected to a support 2 installed via a bearing 23 provided around the sliding contact portion 26 of the sliding pulley 22.
It engages with the engagement groove 28 provided in 4. Note that it may be directly engaged with the back side stepped portion of the support ring 24, and an intervening body 27 may be installed if necessary to adjust the amount of sliding of the sliding pulley 22. In addition, in the speed change control device 60 of this embodiment, the axis A of the hoisting screw 54,
Although an example has been shown in which the shafts 57a and 57b are arranged in a straight line so that the shafts B are almost parallel to the housing wall surface 10, only one guide shaft is installed in the center and the shafts B and the winding The axis A of the upper screw 54 and the axis C of the pulley rotating shaft 12 are located at opposite ends of each other, and are aligned in a straight line so that the axis centers are aligned perpendicularly to the housing wall surface 10. It may also be arranged to prevent the occurrence of mechanical strain.

As described above, the speed change control device 60 of this embodiment has the circuit panel section 30 arranged on the outdoor side and the shift lever support section 50 arranged on the indoor side, centering on the frame section 40 surrounding the geared motor. Moreover, these three parts are the circuit panel 30,
Since the frame part 40 and the support frame 50 are integrally assembled in this order, the screw holes 31a provided in the flange part 31b of the outer cover 31 and the frame 41
As long as the screw holes 41b provided in the housing 10 and the screw holes 41b are opened at the same position, the tip of the shift lever 51 of this integrated assembly can be inserted into the room through the hole 14 provided in the housing 10, and the flange portion 31b ,4
1b can be attached to the installation surface 45 from outside using screws 31c. At this time, if the tip engaging portion 58 of the shift lever 51 is set to a predetermined length from the indoor end surface of the flange portion 41a or the installation surface 45, the engaging portion 58 can be connected to the variable diameter pulley body 20 by simply attaching it. The engaged state is automatically obtained. Furthermore, it is easy to remove the integral assembly 60 from the wall surface of the housing 10 by performing the reverse procedure to that described above, and there is no need to disassemble the integral assembly 60 itself at all. Work efficiency is significantly improved. In addition, when performing maintenance work only on the circuit panel, such as when changing the speed range, the lid
Since it is only necessary to open 2, maintenance work can be made more efficient in this respect as well.

[Other Examples]

In the above-described embodiment, the panel 33 is supported inside the outer cover body 31, but there is no need to be limited thereto, and suitable mounting hardware may be placed on the frame 41 to support the panel 33. Further, in this embodiment, the first power transmission section is shown as a chain and a sprocket, but it may also be a timing belt or a pulley. In addition, by installing a gear on the geared motor shaft and the rotating screw 37a, further providing an intermediate gear between them, and also installing a gear on the rotating screw 37a, direct power is generated only by the combination of multiple gears. It may be communicated. Furthermore, although the variable diameter pulley body 20 is a driving pulley in this embodiment, it may be controlled by connecting a driven pulley (not shown) to the speed change control device 60. Further, it is also easy to construct the frame 41 and the support frame 42 as an integral casting.

Further, in this embodiment, the tip of the shift lever 51 is Y-shaped or U-shaped, but
The support ring 24 does not necessarily need to be pressed at two points, and may be engaged and pressed at one point.In that case, it does not have to be Y- or U-shaped, and may be rod-shaped.

[Effect of idea]

According to this invention, each component of the speed change control device is integrally assembled as a whole, and can be attached and detached only in the radial direction with respect to the input shaft center through an opening in the side wall of the housing while still being assembled. As a result, maintenance work such as belt replacement can be done extremely quickly, even when a wide flat device such as a blower is installed on the output shaft, or when work is required in a narrow and dangerous place. And it can be done efficiently.

In addition, when the speed change control device is assembled as one piece, the large load applied from the sliding pulley to the shift lever is applied to the flange of the frame via the support frame and frame, and is further absorbed and dispersed by the housing wall. If it is strengthened by iron casting or the like, extremely stable speed change control will be possible.

Furthermore, since the entire speed change control device is compact and integrated, and is completely housed within the housing, it will not be affected by temperature and humidity even if it is exposed directly to the atmosphere due to outdoor installation, eliminating the risk of corrosion. This has achieved what was conventionally thought to be impossible for belt transmissions to be used even in poor atmospheres such as raindrops, water vapor, or dust. Moreover, since it is fully automated by remote control, it has great industrial utility value.

[Brief explanation of the drawing]

1A and 1B are longitudinal and cross-sectional views, respectively, of a belt transmission control drive device according to an embodiment of the present invention, and FIG. 2 is a shift lever support frame and a support ring used in the same embodiment. A perspective view of the figure is shown. FIGS. 3A and 3B show a side view and a front view, respectively, of an entire belt transmission using a conventional speed change control drive. In the figure, 10... Sealed housing, 15... Reversible motor, 16... Gear head, 20...
...Variable diameter pulley body, 30...Circuit panel section, 24
...Support, 36...Potentiometer, 34...
... Control circuit, 41 ... Frame, 40 ... Frame section, 51 ... Shift lever, 50 ... Shift lever section, 60 ... Speed change control device.

Claims (1)

[Scope of utility model registration request] The shift lever, the lever lifting device, the drive motor, the control circuit, and the outer cover body are integrally assembled in this order, and the shift control device installed on the outer wall of the sealed housing of the belt transmission and the variable speed pulley body are connected via bearings. The shift control device is arranged such that the shift lever and the support can be freely separated when the speed change control device is separated from the sealed housing, and the speed change control device is configured to support the variable speed control device. The closed housing has an opening for mounting the speed change control device at a position orthogonal to the rotation axis of the variable speed pulley body so that the closed housing can be attached to and removed from the closed housing only in a radial direction centered on the rotation axis of the pulley body. A belt transmission control drive device made of