JPH10291785A - Motor driven winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent oil from leaking in simple constitution and reduce the number of parts by inserting a transmission shaft unto a coupling integrated type primary pinion integratedly forming a coupling part on the transmission shaft side of a primary pinion, and rotatably journaling the coupling integrated type primary pinion with a gear case through a bearing. SOLUTION: A coupling 2 for connection and a primary pinion 3 of a coupling integated type primafy pinion 1 are integratedly formed, hole side spline 4 is worked on the inner circumference of the coupling 2, and it can be connected with the shaft side spline on the outer circumference of a transmission shaft. The end face of the hole side spline 4 is provided with a sloping guide face 7 in the direction perpendicular to the direction of tooth trace. The coupling integrated type primary pinion 1 is supported with a bearing supported with the inner circumference of a gear case fixed to a frame at both the end parts. A flange part 1-1 is formed on the outer circumference of the coupling integrated type primary pinion 1, so as to bring the flange part 1-1 in contact with the inner circumferential ring of the bearing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hoist,
More particularly, the present invention relates to an electric hoist such as a hoist having a rope drum and having a long connecting shaft passing therethrough.

[0002]

2. Description of the Related Art A conventional rope hoist will be described with reference to FIGS. FIG. 4 is an external view of the electric hoist, and FIG.
Is a structural view, and FIG. 6 is a partially enlarged view of a speed reduction mechanism unit.

[0003] Referring to the drawing, the transmission shaft 5 and a first-stage pinion 14 at the first stage of the speed reduction mechanism unit 13 are connected by a coupling 15 in terms of assemblability.
That is, the transmission shaft 5 and the reduction mechanism unit 13 are separately manufactured as small unit components, and finally, the transmission shaft 5 and the first-stage pinion 14 of the reduction mechanism unit 13 are connected to obtain a large component. . For the purpose of improving the assemblability, the transmission shaft 5 and the first-stage pinion 14 on the first stage side of the reduction mechanism unit 13 are connected to the coupling 1.
5 is connected by a spline connection.
6 is supported. Similarly, the motor shaft 17 and the transmission shaft 5 are connected by the motor-side coupling 18.

[0004]

Conventionally, the grease in the gear case 19 leaks in the direction of the transmission shaft 5 from the gap of the meshing portion of the spline, and the rope R is wound. There is a problem of leakage to the outside through the gap between the end of the drum 12 and the frames 11-1 and 11-2.

In addition, the three-member composite structure has a high tolerance, and the possibility of misalignment is small, the contact between the first-stage pinion 14 and the first-stage gear 9 is deteriorated, and noise is generated. Furthermore, since the single-stage pinion 14 shaft is not directly supported by the bearing, but the coupling 15 connected by the spline is supported, misalignment may occur due to the play of the spline. Improvement was desired in this respect.

[0006] The assembly of the electric hoist of the above-mentioned conventional structure is as follows.
This is a method of assembling while stacking the frame 11, the drum 12, etc. with the motor 10 down, and finally assembling the speed reduction mechanism unit 13. At this time, the transmission shaft 5 and the single-stage pinion 14 constituted by the speed reduction mechanism unit 13 are assembled. The operation of connecting the couplings 15 by spline connection involves lifting the heavy reduction mechanism unit 13 and pressing the coupling 15 assembled with the single-stage pinion 14 in the reduction mechanism unit 13 in the direction of the transmission shaft 5, and It must be done while adding rotation.

[0007] Further, during maintenance or the like after erection, horizontal assembly is performed, and in many cases, work at high places with poor scaffolding is performed.
For these reasons, improvement in assemblability has been desired.

Focusing on the above, the present invention can prevent oil leakage from the coupling portion with a simple configuration, reduce the number of parts, reduce noise caused by misalignment, and improve assemblability. An object of the present invention is to provide an electric hoist.

[0009]

An object of the present invention is to provide a first frame, a second frame facing the first frame, a motor provided on the first frame, and a deceleration provided on the second frame. A mechanism unit, a gear case containing the reduction mechanism unit and containing lubricating oil, a single-stage pinion meshed with a first gear of the reduction mechanism unit, and a winding member such as a drum rotatably disposed between the two frames. And a transmission shaft that penetrates the first frame and the hoisting member and transmits a driving force of a motor to the single-stage pinion, wherein a coupling portion is integrally formed on the transmission shaft side of the single-stage pinion. And a coupling integrated single-stage pinion, and the coupling integrated single-stage pinion inserted into the coupling portion for transmitting a rotational force to the coupling integrated single-stage pinion. And Itarujiku, are also achieved by the coupling integrated type single stage pinion is provided a bearing for rotatably supporting the gear case.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a structural view of an electric hoist using a coupling-integrated one-stage pinion adopting the present invention, FIG. 2 is a structural diagram of an electric hoist using a coupling-integrated one-stage pinion adopting the present invention, and FIG. The partial enlarged view of the reduction mechanism unit of the electric hoist which employs the adopted coupling-integrated pinion is shown.

In these figures, reference numeral 1 denotes a coupling-integrated single-stage pinion, which has a coupling 2 and a single-stage pinion 3. The coupling 2 for connection and the single-stage pinion 3 are integrally formed from cast steel.
A hole-side spline 4 is machined on the inner circumference of the transmission shaft 5.
It is configured to be connectable to the shaft spline 6 on the outer periphery. The end face of the hole side spline 4 on the inner circumference of the connection coupling 2 can be easily connected to the transmission shaft 5 even if the tooth faces do not completely coincide with each other, as long as it is pressed in the axial direction even if the tooth faces do not completely match. A guide surface 7 having an inclination in a direction perpendicular to the tooth streak direction is provided so that the teeth are guided so as to mesh with each other.

Further, a one-stage pinion 1 with an integral coupling
Is a gear case 1 having both ends fixed to the frame 11-2.
9 are supported by bearings 8a and 8b supported on the inner periphery of
The contact between the first-stage pinion 3 and the first-stage gear 9 is improved so that noise is hardly generated. Further, if a flange portion 1-1 is formed on the outer periphery of the coupling-integrated single-stage pinion 1, and in addition to this, the flange portion 1-1 is brought into contact with the inner peripheral ring of the bearing, the oil is further increased. The sealing effect is increased, and oil leakage can be more reliably prevented.

Further, the whirling of the connecting portion is reduced by supporting the outer peripheral portion of the coupling 4.

Reference numeral 11-1 denotes a frame on the motor 10 side;
Reference numeral -2 denotes a frame on the side of the speed reduction mechanism unit 13, both of which are formed of steel plates.

The electric hoist is assembled by stacking the frame 11, the drum 12 and the like with the motor 10 down as in the prior art.
At the time of assembling, the work of connecting the transmission shaft 5 and the reduction gear unit 13 with the coupling-integrated single-stage pinion 1 is performed by lifting the reduction gear unit 13 and
It is possible to connect only by pressing the coupling-integrated one-stage pinion 1 assembled in the direction of the transmission shaft 5, and in addition to the conventional assembly method that had to be performed while applying rotation, Easy assembling work becomes possible.

Similarly, during maintenance after the installation, the work can be performed more easily than the conventional assembling work.

Since the present invention is constructed as described above, the single-stage pinion 3 and the coupling 2 are integrally formed from one material, so that the grease in the gear case 19 leaks out of the gap of the spline engagement portion. Is prevented,
It is possible to solve the problem that the lubricant falls from the hoist body to the floor and soils the floor.

In addition, since the conventional shaft connection method has a three-member composite structure, tolerances are accumulated and misalignment occurs, thereby deteriorating the tooth contact between the first-stage pinion 3 and the first-stage gear 9, Although this was a cause of noise generation, in the present invention, the connecting portion made up of three members is composed of two members, and by reducing the number of components, the accumulation of tolerances of individual components is reduced, and misalignment occurs. It is possible to reduce the possibility of doing. As shown in FIG. 2, the coupling-integrated single-stage pinion 1 according to the present invention has both ends supported by bearings, and similarly improves the tooth contact between the single-stage pinion 3 and the single-stage gear 9. Further, by supporting the outer peripheral portion of the coupling 2 for connection, it is possible to reduce the whirling of the coupling portion.

When assembling a conventional electric hoist, the electric hoist is assembled by stacking the frame 11, the drum 12 and the like with the motor 10 down, and finally the speed reduction mechanism unit is assembled. The work of connecting the shaft 5 and the single-stage pinion 14 constituted by the reduction mechanism unit 13 by spline coupling with the coupling 2 lifts the reduction unit 13 which is a heavy object and is assembled together with the single-stage pinion 14 in the reduction unit 13. The coupling 2 must be pressed in the direction of the transmission shaft 5 and further rotated while being rotated.
Also, during maintenance after installation, etc., it will be horizontally assembled,
In addition, there are many cases of work at a high place where a scaffold is poor, and for this reason, improvement in assemblability has been desired.

On the other hand, in the present invention, as shown in FIG. 1, the end face of the spline 4 on the hole side of the inner periphery of the coupling 2 has a completely toothed surface so as to be easily connected to the transmission shaft. Even if not, the guide surface 7 that is inclined in the direction perpendicular to the tooth line direction is provided so that the entire tooth surface can be guided so as to mesh with it as long as it is pressed in the direction of the transmission shaft 5. It is possible to improve the assemblability. This guide surface acts to guide the two to facilitate a smooth insertion.

[0022]

As described above, according to the present invention, oil leakage from the coupling portion can be prevented with a simple structure, the number of parts is reduced, the generation of noise due to misalignment is reduced, and the assembly is easy. Thus, it is possible to provide an electric hoist that is improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a coupling coupling-integrated pinion according to the present invention.

FIG. 2 is a structural view of an electric hoist using a coupling coupling-integrated pinion according to the present invention.

FIG. 3 is a partially enlarged view of a speed reduction mechanism of an electric hoist using a coupling-integrated pinion adopting the present invention.

FIG. 4 is an external view of a general electric hoist.

FIG. 5 is a structural view of a conventional electric hoist.

FIG. 6 is a diagram showing a connection portion between a motor shaft and a transmission shaft of a reduction mechanism of a conventional electric hoist.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Single-stage coupling pinion, 2 ... Coupling, 3 ... Single-stage pinion, 5 ... Transmission shaft, 8a, 8b ... Bearing, 10 ... Motor, 11-1, 11-2 ... Frame, 1
3 ... reduction mechanism unit, 19 ... gear case.

Claims (5)

[Claims] 1. A first frame, a second frame opposed to the first frame, a motor provided on the first frame, a speed reduction mechanism unit provided on the second frame, and a speed reduction mechanism unit And a gear case in which lubricating oil is stored, a single-stage pinion meshed with a single-stage gear of a reduction mechanism unit, a winding member such as a drum rotatably arranged between the two frames, the first frame, An electric hoist having a transmission shaft that penetrates a hoisting member and transmits a driving force of a motor to the single-stage pinion, wherein a coupling portion is integrally formed on a transmission shaft side of the single-stage pinion. One-stage pinion,
An electric motor comprising: the transmission shaft inserted into a coupling portion for transmitting a rotational force to the coupling-integrated single-stage pinion; and a bearing that rotatably supports the coupling-integrated single-pinion to the gear case. Hoist. 2. The electric hoist according to claim 1, wherein the one-stage pinion integrated with the coupling is rotatably supported on the gear case by two bearings. 3. The electric hoist according to claim 1, wherein the transmission shaft and the coupling portion are connected in a spline shape so as to be movable in the axial direction and immovable in the rotational direction. Good machine. 4. The electric hoist according to claim 3, wherein a guide surface for guiding the insertion and coupling of the transmission shaft end and the coupling end is formed on one or both of the teeth. Electric hoist. 5. The electric hoist according to claim 1, wherein a flange is provided on an outer periphery of the coupling, and the flange is brought into contact with an end of the bearing.