JPS6244197Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a belt-type reduction gear, more specifically, a reduction gear and a motor are combined, and a speed change pulley is attached to the output shaft of the motor and the input shaft of the reduction gear, respectively. A motor installed above the reducer, especially in a belt-type reduction gear in which a power transmission belt is stretched between pulleys to reduce the rotational input from the input shaft of the reducer and transmit it to the output shaft of the reducer. can be rotated over a wide range of angles around the reducer, without touching installation parts such as belts stretched between the pulley attached to the output shaft of the reducer and the pulley attached to other parts. This invention relates to a belt-type speed reducer that is intended to allow the position of a motor to be changed.

A belt-type reduction gear, which consists of a continuously variable speed pulley and a power transmission belt attached to the pulley between the reducer and the motor, usually has the motor and reducer placed separately on one base to form a unit. However, a device with this configuration requires a large installation area, and this also causes a reduction in work efficiency in many ways.

Recently, with the aim of downsizing equipment and reducing costs, a motor with an output shaft and a reducer with an input shaft are arranged vertically, and a V-belt is attached to the speed change pulley attached to each shaft. A reduction gear that transmits the rotational input from the input shaft of the reduction gear to the output shaft by hanging is proposed, and one example of this is the
-23034 publication or Japanese Utility Model Application Publication No. 57-117449 are disclosed. And especially the above-mentioned Jikko Sho 51-
Publication No. 23034 discloses a structure in which a support is provided protruding from the outer peripheral surface of a speed reducer, and a mounting plate of the motor is removably attached to the support to change the position of the motor.

(Problem to be solved by the invention) By the way, as shown in the above-mentioned Japanese Utility Model Publication No. 51-23034, even in a reduction gear that can freely change the position of the motor, the outer peripheral surface of the reduction gear Since the position of the support column is limited, the locations where the motor can be installed are greatly limited. The motor may come into contact with the attached pulley or the V-belt that engages with the pulley, or with various parts arranged around the reduction gear, and for this reason, the reduction gear itself must be made smaller. See the emergence of new problems.

Furthermore, installing struts protruding from the outer circumferential surface of the reducer itself is extremely difficult to process, and in order to support the motor with a large load, strong struts that are firmly attached to the reducer are required. There may also be problems such as:

(Means for Solving the Problems) The present invention provides a belt-type speed reducer in which a belt is stretched between pulleys fixed to both the output shaft of the motor and the input shaft of the speed reducer, respectively. A pair of plate-shaped support legs were hung on both sides of the fixed base, with a large diameter hole approximately in the center and a group of small holes drilled on a concentric circular line around the large diameter hole. Make a channel-shaped frame when viewed from the front, fit the large diameter holes into the protruding bosses on both sides of the reducer body, insert bolts through any small holes, and tighten the bolts over the reducer body. In order to eliminate the problems inherent in the above-mentioned conventional devices of this type, the present invention is based on a channel-type speed reduction device consisting of a speed reducer and a motor that can move around the speed reducer. In the large diameter hole of the pair of plate-like support legs of the frame, a boss part that protrudes outward from the main body of the reducer case is used to support the cap for fixing the bearing of the worm shaft attached to the reducer. The frame body on which the motor is placed is mounted on the reducer by fitting the boss portion and using the mounting bolts of the bearing fixing cap, and the motor is installed and fixed. The present invention provides a belt-type speed reducer that allows the position to be selected over a wide range and in small pitches and is not easily affected by the layout of accessory parts attached to the speed reducer, such as pulleys, belts, or surrounding parts. be.

(Example) Next, a specific example of the belt type reduction gear according to the present invention will be described using the drawings.

1 and 2 are respectively a front view and a side view of a belt type reduction gear according to the present invention. The belt type reduction gear 1 includes a motor 3 having an output shaft 2 and an input shaft 4.
and an output shaft 5 that is perpendicular to this shaft 4 and that decelerates and outputs the input rotation from this input shaft 4.
A V-belt 9 is stretched between speed change pulleys 7 and 8 fixed to the output shaft 2 of the motor 3 and the input shaft 4 of the reducer 6, respectively, to reduce the rotation of the motor 3. The information is configured to be transmitted to machine 6.

The speed change pulley 7 attached to the output shaft 2 of the motor is not particularly limited in structure, but here, it slides on the fixed sheave 1 fixed to the output shaft 2 and the shaft 2 in the axial direction. It consists of a sliding sheave 11 that is always urged by a spring to approach the fixed sheave 1 side. On the other hand, the speed change pulley 8 attached to the input shaft 4 of the reducer 6 is similar to the above-mentioned pulley 7, but only the sliding sheave 1
A speed change operating device 14 is attached to the sliding sheave side for performing a speed change operation for moving the sheaves 12 and 13 toward and away from the fixed sheave 13. By rotating the operating handle 14', the distance between the two sheaves 12 and 13 can be changed. The pitch diameter of the V-belt 9 is adjusted and the pitch diameter of the V-belt 9 is changed to perform a speed change operation. This speed change operation device 14 is attached to the input shaft 4 together with the speed change pulley 8. In order to prevent the speed change operation device 14 from spinning idly, a protruding rod 15 is provided on the speed change operation device 14.
5 contacts and engages with a detent fitting 16 fixed to a safety cover 17 that surrounds the speed change pulleys 7, 8 and the V-belt 9 engaged therewith.

Figure 3 is a perspective view of the frame for mounting the motor.
This frame body 18 includes a base 20 provided with a plurality of through holes 19 for mounting the motor, a pair of triangular plate-shaped support legs 21 hanging from both sides of the base 20,
It exhibits a front view channel type consisting of 21 parts, and this 1
Each of the pair of support legs 21 has a large diameter hole 24 approximately in the center thereof, and a group of small holes 25 are formed on a concentric ring line around the large diameter hole 24 at a predetermined pitch.

After installing and fixing the motor 3 on the base 20 of the channel-shaped frame 18 using the through hole 19, the motor 3 is inserted into the large diameter hole 24 of the pair of plate-like support legs 21 of the frame 18. Inserting stepped bosses 22 provided on both side end wall surfaces of the case body of the reducer 6 to support the bearing fixing caps of the worm shaft that constitute a part of the reducer that protrude outward;
As a result, the frame 18 with the motor 3 installed on its upper surface is mounted so that it can be rotated around the reducer 6, more specifically, the stepped boss 22 of the reducer,
When the motor 3 has secured approximately the predetermined position on the reducer 6, the bearing is fixed to the side end wall of the case body of the reducer through a small hole 25 bored around the large diameter hole 24. A bolt is inserted into the small hole 25 by aligning it with a screw hole previously drilled to fix the cap, and by screwing the bolt, the frame 18 is tilted to a predetermined angle on the reducer 6. In turn, the motor 3 itself is assembled with a predetermined inclination on the reducer. The frame 18 is also fixed to the safety cover 17 via a pair of brackets 26 extending from one end of the base 20 of the folding frame 18.

(Function) Motor 3 fixed on base 20 of frame 18
If you want to change the position, first separate the safety cover 17 fixed to the frame 18 from the reducer 6, and then remove the bolts inserted into the small holes 25 provided around the large diameter hole 24. After rotating the motor 3 located above the reducer 6 through the frame 18 to a position opposite to the output shaft 5 of the reducer 6, insert the bolt into the small hole 25. Frame 1
8 to the reducer 6 again.

The rotation angle of the frame 18 is arranged around the large diameter holes 24 of the pair of support legs 21, and the angle can be freely adjusted by adjusting the pitch of the small holes 25.

(Effects of the invention) The belt type reduction gear according to the invention has a structure in which the motor is installed and fixed on a channel-type frame, and this frame is further fixed at a predetermined angle with respect to the reduction gear. In addition, the attachment angle of the frame to the reducer can be freely adjusted to allow the motor to move around the reducer over a wide range, selectively fixing its position, and the motor is attached to the belt type reducer. For example, it is possible to subtly avoid contact with the pulley attached to the output shaft of the reducer, the belt hooked to this pulley, or other parts located around it, and it is also possible to avoid the motor's rotational movement. This can be done extremely easily by using mounting parts with a simpler structure than conventional mechanisms and by using the protruding boss originally provided on the case body of the reducer, and the reduction gear of the motor can be easily installed. Since the position can be selected over a wide area around the center and at minute pitches, the effect of greatly increasing the arrangement width of the component parts of the entire speed reduction device can be expected.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a belt type speed reducer embodying the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a perspective view of a frame for mounting a channel type motor. In the figure, 1 is a belt type reduction gear, 2 is an output shaft, and 3
is a motor, 4 is an input shaft, 6 is a deceleration shaft, 7 and 8 are variable speed pulleys, 9 is a V-belt, 18 is a frame body, 19 is a through hole for mounting the motor, 20 is a base, 21, 21
is a plate-like support leg, 22 is a boss, 24 is a large diameter hole, 25
indicates a small hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a belt-type speed reduction device in which a belt is stretched between pulleys fixed to both the output shaft of the motor and the input shaft of a speed reducer, the motor is mounted. A front view of a pair of plate-shaped support legs with a large-diameter hole approximately in the center and a group of small holes perforated on a concentric circular line around the large-diameter hole on both sides of a fixed base. The large diameter holes are fitted into the projecting bosses on both sides of the reducer body in a channel-type frame body, the bolts are inserted through any small holes, and the bolts are screwed onto the reducer body. Belt type reduction gear. (2) The scope of the utility model registration claim is that the protruding bosses protruding from both sides of the reducer body are formed relative to both sides of the reducer body as supporting parts for internally mounting bearings in the reducer body. The belt type reduction gear according to item 1.