JP2500204Y2 - Coupling structure of winding cylinders such as hoists - Google Patents

Description

[Detailed Description of the Invention] A. Industrial Field of Application The present invention relates to an improvement in a connection structure of a winding cylinder, which is installed in a hoist or other hoist and winds a wire rope, with an output shaft.

B. Outline of the Invention The present invention relates to a hoist or the like in which a winding cylinder is concentrically provided on a tubular connecting member via a support member, and the connecting member is concentrically provided on a reduction output shaft. The inner diameter of the tubular connecting member integrated with the body is configured to be larger than the outer diameter of the deceleration output shaft, and a cylindrical drum joint having a required wall thickness is press-fitted into the cylinder, and the connecting member and the drum joint are connected. Are coupled with a fixing member such as a set screw or a knock pin, the deceleration output shaft is inserted into the hollow cylinder of the drum joint, and the drum joint and the deceleration output shaft are key-coupled to each other, so that these joint portions are To facilitate the production of.

C. Conventional Technology In general, hoists used for cargo handling work are those shown in FIGS. 3 and 4.

This is a deceleration output shaft 5 of a speed reducer 4 which is linked to an output shaft 3 of a drive motor 2 installed on a hoist body 1 and is connected to a winding drum (winding drum) 7 around which a wire rope 6 is wound. Then, by rotating the winding cylinder 7 in the normal direction or in the reverse direction, the wire rope 6 wound around the winding cylinder 7 is taken up or pulled out, thereby
The load hooked on a hook sheave (not shown) that is hung on the floor is moved up and down.

Further, when the drive motor 2 is stopped, the output shaft 3 is stopped from rotating, so that the rotation of the winding drum 7 interlocked via the speed reducer 4 is stopped and the suspended load does not drop. The brake device 8 is installed.

Further, in the hoist as described above, the torque transmission portion between the deceleration output shaft 5 of the reduction gear and the winding drum 7 is connected by key connection in order to facilitate disassembly and assembly.

That is, the tubular connecting member 10 is installed inside the winding drum 7 via the support member 9 concentrically with the winding drum 7. In addition, a key groove 11 is bored in a part of the inner circumference of the connecting member 10 along the axial direction, and correspondingly, a key groove 12 is bored in the deceleration output shaft 5 as well.

Then, the connection member 10 is fitted to the deceleration output shaft 5, the key grooves 11 and 12 are aligned with each other, and the key 13 is fitted to this, so that both are key-connected.

D. Problems to be Solved by the Invention When the torque transmission part of the winding body portion of the conventional hoist as described above is key-coupled, the connecting member of the winding body is connected.
It may be difficult to form the keyway 11 in the key groove 10.
This is the case where the diameter of the winding drum 7 is large, or the length of the winding drum 7 is increased in order to increase the lifting height. In order to process the key groove 11 on such a winding drum 7, There is a problem that special equipment is required and the conventional processing machine must be extensively modified.

In view of the above points, the present invention makes it possible to machine a key groove without using special equipment even if the winding cylinder is enlarged.
It is an object of the present invention to newly provide a key connecting structure for a torque transmitting portion of a winding cylinder.

E. Means for Solving the Problems In the connection structure of a winding cylinder such as a hoist of the present invention, the winding cylinder is concentrically provided on a cylindrical connecting member via a supporting member, and the connecting member is a deceleration output shaft. In a hoist or the like concentrically provided above, the inner diameter of a tubular connecting member integrated with the winding cylinder is configured to be larger than the outer diameter of the deceleration output shaft, and a tubular drum having a required wall thickness is provided inside the tubular connecting member. A fitting is press-fitted, the connecting member and the drum joint are connected by a fixing screw or a fixing member such as a knock pin, and a deceleration output shaft is inserted into a hollow cylinder of the drum joint, and the drum joint and the deceleration output are inserted. It is characterized in that the axis and the key are connected by a key.

F. Action By configuring as described above, even in the case of a large-sized winding cylinder, the drum joint is fixed to the large-diameter connecting member by a fixing member that is easy to process, and the small-diameter and small-diameter drum joint is
The key groove can be easily formed without using a special processing device.

G. Embodiment An embodiment of the connection structure for the hoist or other winding cylinder of the present invention will be described below with reference to FIGS. 1 and 2. In FIGS. 1 and 2, the parts corresponding to those of the conventional example shown in FIGS. 3 and 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the longitudinal sectional view of FIG. 1, 1 is a hoist body, 2 is a drive motor, 3 is an output shaft, 4 is a speed reducer, 5 is a deceleration output shaft, 6 is a wire rope, and 7 is a winding drum.

The winding drum 7 is large-sized and extended, and a large-diameter tubular connecting member 10 is installed inside the winding drum 7 coaxially with a support member 9.

A cylindrical drum joint 14 having a predetermined wall thickness is fitted and installed in the cylinder of the connecting member 10.

That is, the drum joint 14 is press-fitted into the inner space of the connecting member 10. Further, it is desirable that the turning torque can be transmitted by the fastening force only by the press-fitting margin. However, when the winding cylinder 7 becomes large in size, the press-fitting load becomes large in order to press-fit to withstand the turning torque transmission. Therefore, press-fitting becomes difficult.

Therefore, as shown in the cross-sectional view of FIG. 2, screw holes are drilled in eight places of the press-fitting surface portions of the connecting member 10 and the drum joint 14, and the set screws 15 are fitted into these holes, respectively, to thereby rotate torque. Fasten so that it can be transmitted. In addition, in this conclusion,
A fixing member such as a knock pin may be used.

A key groove 11 is bored in the inner peripheral portion of the drum joint 14 thus installed. The processing work to form this key groove 11 is
The inner diameter of the drum joint 14 is smaller than the inner diameter of the connecting member 10,
Moreover, as a whole, the drum joint 14 is considerably smaller than the winding cylinder 7 and is easy to handle, so that it can be machined relatively easily, and no special equipment for machining the key groove 11 is required.

Therefore, in the present embodiment, when the winding cylinder is processed and manufactured, the key groove 11 need not be processed, so that it can be manufactured only by lathe processing and screw processing, and can be easily manufactured without using a special machine tool. It is a thing.

Next, in the inner space of the drum joint 14 configured as described above,
The deceleration output shaft 5 provided with the key groove 12 is fitted and inserted, and the key groove 11 and the key groove 12 are aligned with each other, the key 13 is fitted,
The two are combined to form a structure.

H. Effect of the Invention As described in detail above, according to the connection structure of the hoist or other winding cylinder of the present invention, the hollow cylinder of the connection member installed inside the winding cylinder has a predetermined wall thickness. The cylindrical drum joint is press-fitted, both are fixed with a fixing member such as a set screw or a knock pin, the reduction output shaft is inserted into the hollow cylinder of this drum joint, and the key is formed in the key groove formed in each of them. Since it is configured by inserting and joining, it eliminates the difficult work of manufacturing the key groove in the large diameter connecting member of the large-sized winding drum, and makes it possible to manufacture the winding drum portion only by lathe processing and screw processing, In addition, a key groove can be easily manufactured on a small-sized, small-diameter drum joint so that it can be key-coupled to the deceleration output shaft, so a special manufacturing device for forming the key groove is not required as a whole, and it is an inexpensive product. Has the effect of making it possible to provide.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a connecting structure of a winding cylinder such as a hoist of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a conventional hoist. Longitudinal section, 4th
The drawing is a sectional view taken along line IV-IV in FIG. 1 ... Hoist body, 5 ... Deceleration output shaft, 7 ... Winding cylinder,
10 …… Connecting member, 11,12 …… Keyway, 13 …… Key, 14…
… Drum joint, 15 …… Set screw.

Claims (1)

(57) [Scope of utility model registration request] 1. A hoist or the like in which a winding cylinder is concentrically provided on a tubular connecting member via a support member, and the connecting member is concentrically provided on a deceleration output shaft. The inner diameter of the cylindrical connecting member is configured to be larger than the outer diameter of the deceleration output shaft, and a cylindrical drum joint having a required wall thickness is press-fit into the cylinder, and the connecting member and the drum joint are set screws, Alternatively, it is coupled with a fixing member such as a knock pin, the reduction output shaft is fitted into the hollow cylinder of the drum joint, and the drum joint and the reduction output shaft are key-coupled to each other. Connection structure.