JPS636521Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides stable operation even when the pulley automatic transmission mechanism of a belt transmission is installed outdoors, and
The present invention relates to a transmission control drive device that significantly simplifies maintenance operations.

In recent years, there has been a strong trend toward fully automated transmissions using electronic control from the perspective of energy conservation, and belt transmissions are being used in various fields.

However, as shown in FIG. 1, conventionally, a main motor 11 and a reduction gear 12 are usually connected to a housing 10, and a control section 13, a transmission section 14, and a pilot control motor, that is, a geared motor 15 are attached to the housing 10. Not only does this cause a design problem, but also when it is installed outdoors, for example when used under high temperature and humidity conditions, it is exposed to moisture intrusion and corrosion of the pilot motor. There was a risk of causing In particular, when installing this type of belt transmission at the air outlet of a cooling tower, it will not be possible to put it into practical use unless it can be controlled completely automatically and there will be no malfunctions due to equipment corrosion. It is possible. The configuration of the control motor shown in FIG. 1 cannot meet this demand.

Second, when this belt transmission is installed in an outdoor hazardous location, it is desired that maintenance work such as belt replacement be simplified. However, in the conventional belt transmission, the geared motor 15, the transmission section 14, and the control section 1
After disassembling the belt in the order of 3, one of the two bearings of the rotating shaft is released to replace the belt, but this is extremely inefficient.

In this invention, the electric control device that controls the speed change of the variable speed pulley body is assembled with the hoisting device, the geared motor, the circuit device, and the outer cover body, and at that time, the geared motor, which generates a large amount of heat, is The entire circuit device, etc., is sealed together with the variable speed pulley body in the sealed housing chamber of the belt transmission, and is detachable from the housing as a whole, making it easy to operate under raindrops and dust atmospheres. Another object of the present invention is to provide a transmission control drive device that can ensure stable operation against corrosion and the like, and can significantly simplify maintenance such as belt replacement.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows a transmission control drive device according to an embodiment of the present invention, in which a main motor 21 (not shown) having a variable diameter pulley body 30 mounted on a shaft 22 is disposed in a housing 20. On the other hand, the pulley body 30 is configured such that fixed and sliding pulleys 31 and 32 are vertically slidable at respective sliding portions 35 and 36, and rotate integrally. A support body 34 is attached to the outside of the sliding portion 35 of the pulley 32 via a bearing 33. This support 34 is further coupled to an electric control device 40 attached to the housing 20.

The electric control device 40 has an outer cover body 41 including a lid body 42 and an inner support body 44, and the former includes circuit devices such as a recycling control electric motor 25, a reduction gear 26, a transmission 24, and a potentiometer. A T-shaped base 43 on which the holder 16 is placed, and a hoisting device 46 equipped with a sliding lever 50 are integrally assembled to the latter. Further, the flange 41b of the outer cover body 41 and the flange 44c of the inner support body 44 are fixed in advance from the indoor side with screws 44d, and then through holes are coaxially drilled in the flanges 41b and 44c at a different position from the screws 44d. housing 20 in an integral assembly via
It is fixed to the outer wall 2a with a plurality of screws 41d.

FIG. 3 is a schematic cross-sectional view taken along section line AA in FIG. 2, and is indicated by the same reference numerals as in FIG. 2.

FIG. 4 shows the hoisting device 46 and the support 34 described above.
FIG. In the figure, the sliding lever 50 includes the upper and lower pivot parts of the hoisting device 46 in FIG.
6b'' (see Figure 3)
The trapezoidal screw 47 is inserted into the two guide rails 48 and 49 and rotated via the transmission body 24 consisting of the chain 29 and sprockets 27 and 28, as shown in FIG. slide in the direction.

Note that the transmission body 24 may be of other types such as a gear. Further, although an example is shown in which two guide rails 48 and 49 are used, it is also possible to use only one thick guide rail. It is within a range that can be easily changed if it is placed at a position of .

On the other hand, the sliding lever 50 is provided with an arm 51,
The two grooves 37 of the support body 34 are engaged with the horse-shaped engagement arms 51a. This groove 37 is formed in the tapered portion 3
9, the arm 51 is locked at its distal end locking point 38, and the locking point 38 is configured to apply an upward force to the support body 34. This is not only to cancel out mechanical errors when the control device 40 is mounted on the housing, but also to stabilize the rotating pulley body 30 by applying an acting force at two points. Note that there is a groove 3 in the support body 34.
The engaging arm 51a directly engages the stepped portion of the support without providing the arm 51a.
It may be brought into contact with.

In the control drive device configured in this way, it is clear that the sliding lever 50 is slid up and down in response to both the forward and reverse rotations of the recycling electric motor 25 as described above, and accordingly, the speed change belt ( The gear ratio of the pulley body 30 equipped with a pulley (not shown) can be controlled. Furthermore, the structure can be such that all the thrust load applied to the electric control device 40 during the operation of speed change control can be received by the housing, that is, the fixed base body 20. The machining process does not require complicated and high-precision machining, and as long as the surface machining of the mounting surface 20a of the housing 20 and the inner support contact surface 44c has a predetermined accuracy, other machining surfaces can be rough-machined without any influence. Without,
Moreover, not only is the balance in terms of appearance and design resolved, but it can withstand use under adverse conditions. Furthermore, maintenance work such as belt replacement is required more frequently because the hoisting device 46 integrated with the circuit device 16, electric motor 25, and sliding lever 50 is all compact and can be attached and detached by simply operating the screw 41b. As a result, the dimensional accuracy can be maintained at all times, which can significantly simplify the process. It should be noted that the present invention can be modified in various ways.
6 can be formed into an integral casting.

As described above, according to the transmission control drive device of the present invention, all the internal devices of the electric control device, such as the geared motor, hoisting device, and circuit device, can be assembled into one body and can be housed in the sealed housing chamber of the belt transmission. Since it is sealed together with the variable speed pulley body, there is no intrusion of raindrops or moisture, and at the same time, even if there is equipment that generates heat itself, such as a geared motor or circuit device, heat will not accumulate in one place. , heat-insulated indoors. Further, the heat dissipated in the room can cool the electric control device by commonly using heat insulating means such as heat insulating fins provided on the outer wall of the housing to cool the frictional heat generated during belt transmission. In particular, by making it possible to take heat-insulating measures for both of these, it is possible to perform sufficient automatic control of belt transmissions even during long-term continuous operation throughout the year, and at the same time, it is possible to control belt transmissions at a remote location from the control point. Since it became possible to operate for such a long time outdoors, it contributed to increasing the industrial utility value of belt transmissions. Further, when installed outdoors, there is an advantage that not only can maintenance work such as belt replacement be speeded up and simplified, but also the external design can be configured into an excellent shape.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a conventional belt transmission, FIG. 2 is a longitudinal sectional view of a transmission control drive device according to an embodiment of the present invention, and FIG. 3 is a sectional view of the sectional view of FIG. 2. A partial cross-sectional view taken along section line A-A is shown. Further, FIG. 4 is a partial perspective view showing the relationship between the hoisting device and the pulley support of the same embodiment. In the figure, 20... housing, 30... variable speed pulley body, 34... support body, 40... electric control device,
46...Hoisting device, 50...Sliding lever.

Claims (1)

[Claims for Utility Model Registration] (1) A sealed housing of a belt transmission, an electric control device installed in this housing, and a variable speed pulley body whose gear ratio is controlled by this electric control device, with bearings installed. In the transmission control drive device, the electric control device includes a hoisting device that includes a sliding lever that is separably engaged with the supporting body within a chamber of the housing; It is constructed by integrally assembling in this order a geared motor that drives the moving lever, an electronic control circuit device on the outdoor side, and an outer cover body provided with a lid for operating the circuit device,
Further, when the outer cover body is attached to the housing, the hoisting device, geared motor, and circuit device are sealed within the housing chamber, and are detachable from the outer wall of the housing while being integrally assembled. Transmission control drive device. (2) The hoisting device has a hoisting screw and a guide rail arranged parallel to the rotational axis of the variable speed pulley body, and the sliding lever is transmitted from the geared motor via a transmission device. The transmission control and drive device according to claim 1, which is a registered utility model, and is configured to slide along the hoisting screw and the guide rail by controlled power. (3) In the electric control device, a first flange portion provided on the central support body to which the hoisting device is fixed is interposed between a second flange portion provided on the outer cover body and an outer wall surface of the housing. 1. A transmission control drive device according to claim (1) of the claimed utility model registration.