JPH09169492A - Lifting device that is operated by tow means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim to a lifting device to be commonly used by providing the same transmission devices for the purpose of a rope traction device and a chain traction device so as to cause the same rope force or the same chain force act in the acting circle radial direction of a chain wheel and a rope drum. SOLUTION: A transmission device 5 includes a chain wheel which is a pocket type chain wheel 6a or a rope drum. A rope trailing device and a chain traction device 13 are provided with the same transmission device 5. In this case, such a premise is considered available that a rope force or a chain force acting on respective acting circular radii from the chain wheel and the rope drum are same to each other. Depending upon whether the rope drum is assembled through with an inside gear part and a driven pinion, or the pocket type chain wheel 6a is assemble together with a driven shaft 11, a rope traction device or chain traction device 13 is formed. However, a transmitter housing 1, an electric motor and an electronic controller incorporation chamber 1a are same for both the rope traction device and the chain traction device 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device actuated by the traction means described in the preamble of claim 1.

[0002]

BACKGROUND OF THE INVENTION Lifting devices of this type are manufactured in small to medium series. It is manufactured for each series group, and in this case, similar transmissions are staged according to the output class. Each output class requires its own transmission, and even one output class may be a chain transmission or a rope transmission.

In prior art lifting devices, different lifting device transmissions are used for each carrying means used (eg rope or chain). Chain traction gear transmissions differ in many features from rope traction gear transmissions.

The basic physical boundary conditions for lifting a load are the same for both chain and rope traction devices, even though the same electric functional force is used at the same load and lifting speed. First, the structure of the transmission device differs between the chain traction device and the rope traction device.

[0005] These differences are notable in particular for the rope and chain traction devices of compact construction, where a direct drive is used, ie no gear adjustment is possible, and is a necessary requirement for pocket type sheaves. The working circle radius is due to being smaller than the required working circle radius in a directly driven rope drum, taking into account the relevant rule that it must not be less than a defined ratio of drum diameter to rope diameter.

If the pocket type chain wheel allowable operating circle radius is small, the final stage torque is inevitably small, and the transmission is downsized and the cost is low. Such a transmission has the same lifting speed and the same load capacity. At, there is no need for a large reduction ratio as in the case of similar rope traction gear transmissions.

[0007] These advantages are utilized in all known chain tractor constructions, so that in the case of chain tractors of compact construction, unnecessarily increasing the working circle radius of the pocket sheave is usually Not done

Utilization of the above-mentioned advantages necessarily leads to different specific structures for the chain traction device and the rope traction device, so that a uniform transmission box module is not possible. The drum diameter required for a rope traction device of the same traction capacity is several times larger, which results in a greater reduction ratio of the transmission in a direct drive with the same traction capacity and in the same rope winding condition.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the amount of inventory by making it possible to use multiple parts that are difficult to manufacture in addition to realizing cost saving.

[0010]

According to the present invention, at least the same electric motor and the same transmission device are provided for the rope traction device and the chain traction device in the lifting device described at the beginning. And it is assumed that the same rope force or chain force acts on the radius of action of the rope drum. An advantage of the invention is the use of a box-shaped module for rope and chain tractors, which consists of the same assembly, for example for electric motors and transmissions. As a result, the gears and pinions from the box-shaped module of the transmission device unique to the manufacturer, including the flat transmission device, the coaxial transmission device, the chain traction device transmission device, the rope traction device transmission device, and the angle type transmission device, can be provided. It can be reused. Furthermore, it is advantageous that a direct acting force flow from the lifting device suspension member to the rope or chain is achieved even if the transmission housing is not loaded by external forces.

Further, it is advantageous that neither the chain traction device nor the rope traction device requires a limit switch for lifting and lowering when the end position is limited.

Furthermore, it is advantageous that the rope drum can be easily extended without changing the main assembly. In the case of a rope traction device, the drive is advantageously C-shaped and therefore the structural length is reduced. Furthermore, it is advantageous that the interface of the transmission housing between the chain guide and the self-supporting frame is identically formed. Furthermore, the wires between the electric motor and the electric housing are short. Furthermore, the built-in capacity for the electrical equipment of the rope traction device or the chain traction device is large, which is particularly advantageous in small lifting devices.

One improvement of the invention is that the same load moment limiter is provided for the rope and chain traction devices and the same built-in chamber for the electronic control unit. . This provides advantages similar to those mentioned above.

The basic idea of the present invention is based on the radius of action of the rope (measured by the diameter in the fully wound state of the rope) of the rope in the drive unit, in which the driven pinion meshes with the rope drum provided with the inner teeth. This can be supported by the fact that the same or almost the same transmission driven torque as in the case of the chain in the pocket chain wheel can be generated on the driven side. Since both working circle radii are the same or almost the same, the peripheral speed of the use supporting means (rope or chain) becomes the same by this arrangement, and the transmission device torque in the driven shaft in the rope traction device and the chain traction device is also the same. Will be the same.

In its realization, the basic idea of the present invention is to selectively assemble the rope drum with the inner teeth and the driven pinion, or to attach the pocket type sheave to the driven shaft of the transmission. Backed by the formation of a self-supporting module for a tractor or a chain tractor. Thus, the lifting device can be quickly assembled for a rope traction device or for a chain traction device, depending on the choice of the particular fitting.

In another advantageous embodiment of the invention, an integral transmission housing is provided for both the rope traction device and the chain traction device. This embodiment enables a transmission box module that consists of a small number of parts and can be manufactured in small to medium series at a low cost. Therefore, the number of transmissions for rope traction devices and chain traction devices is
It can be reasonably organized, which can significantly reduce manufacturing and logistics costs such as inventory control.

In a further advantageous embodiment for further cost savings, gears and pinions can be provided in the transmission, which gears and pinions are flat and coaxial transmissions. It can be taken out from a tooth box module consisting of an angle transmission, a chain traction transmission and a rope traction transmission. Such a tooth box module has a large number of tooth points which can all be manufactured according to factory standards.

In another advantageous embodiment of the invention, the inner teeth cooperate with the driven pinions to form the transmission end stage of the rope traction device. This forms a rope traction device of very compact construction.

In a further advantageous embodiment of the invention, all transmission stages are semipermanently lubricated and sealed. Therefore, open toothing, which is no longer state-of-the-art in compact lifting devices, is avoided. That is, the final stage with the inner tooth portion can be sealed at a cost significantly smaller than that of the outer tooth portion.

Therefore, in another advantageous embodiment of the invention, the transmission end stage with inner teeth of the rope traction device is provided with a sealing member. This leads to a corresponding compactness and the desired operating safety.

In a further advantageous embodiment of the invention, a load-carrying chain guide or a rope-carrying load-carrying frame (18) can be mounted selectively on the transmission housing. . By this measure,
Logistics work is simplified when manufacturing, assembling and assembling parts.

Another aspect of the invention relating to the formation of a lifting device
In one advantageous embodiment, in the rope traction device, the load moment limiter is mounted directly on the pinion shaft at the end of the penultimate transmission of the transmission.

In another advantageous embodiment of the invention, the same load moment limiters are provided for rope and chain traction devices of the same load capacity. A load control device, for example a load moment limiter, is specified by the European Machinery Regulation 89/392 EWG when the lifting device has an effective load of 100 kg or more.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings based on embodiments.

The lifting device has a transmission housing 1, a motor 2 connected to a flange, and a load moment limiter 3a as a load control device 3. The load moment limiter 3a is formed as a slip clutch. Also has a mounting space 1a for the electrical output device or the electronic control unit 4. A transmission device 5 is provided in the transmission housing 1 (FIGS. 1 and 2).

The transmission 5 has a chain wheel 6, and the chain wheel 6 is a pocket type chain wheel 6a or a rope drum 7. Rope traction device 12 (Fig. 2) and chain traction device 13 (Fig. 1)
Are equipped with the same transmission 5. In this case, it is assumed that the rope forces or chain forces acting on the respective action circle radii RK and RS from the chain wheel 6 and the rope drum 7 are the same.

(RK = RS, where RK is the working circle radius of the chain radius 6 and RS is the working circle radius of the rope drum 7). Inner teeth 8 are provided on the rope drum 7 (FIG. 2), and a driven pinion 9 is engaged with the inner teeth 8. In this case, the operating circle radius RS of the driven pinion 9 is equal to or substantially equal to the operating circle radius of the pocket type sheave 6a (FIGS. 4 and 5).

By selecting whether to assemble the rope drum together with the inner teeth 8 and the driven pinion 9 or the pocket chain wheel 6a together with the driven shaft 11, the rope traction device (FIG. 2) Alternatively, a chain traction device (chain hoist) (FIG. 1) is formed. However, the built-in chamber 1a for the transmission housing 1, the electric motor 2 and the electronic control device is the same for the rope traction device 12 and the chain traction device 13.

To form the rope traction device 12,
The inner toothing 8 cooperates with the driven pinion 9 to form the transmission end stage 16 of the transmission 5. The transmission stages 14, 15 and 16 are designed to be semi-permanently lubricated and correspondingly sealed. Therefore, a sealing member 17 is provided on the final stage gear 16 of the inner teeth.

The transmission housing 1 optionally has a load-carrying chain guide 10 (FIGS. 3 and 5 and 7) or a load-carrying frame 18 (FIGS. 4 and 6).
Can be installed.

In the chain traction device 13 and the rope traction device 12, the load moment limiter 3a is directly attached to the pinion shaft (FIG. 1) of the transmission device.

It is economical because the same load moment limiter 3a can be used for the rope traction device 12 and the chain traction device 13 having the same load capacity.

FIG. 5 shows a chain traction device 1 having a chain guide 10, a suspension eye 20 and a chain accumulator 21 for the unloaded end of the chain 22.
One example of 3 is shown. The rope 23 is guided around the rope drum 7 as usual (FIGS. 2 and 6). As shown in FIGS. 1 and 2, an interface 24 is formed between the transmission device 5 and the chain wheel 6 or between the transmission device 5 and the rope drum 7 as indicated by a chain line.

[Brief description of the drawings]

FIG. 1 is an axial partial cross-sectional view of a lifting device as a chain traction device (chain hoist).

FIG. 2 is a partial axial sectional view of a lifting device as a rope traction device.

FIG. 3 is a partial vertical cross-sectional view taken along the line AB of FIG.

FIG. 4 is a transverse cross-sectional view taken along the line C-D of FIG.

5 is a transverse cross-sectional view taken along the line EF of FIG.

FIG. 6 is a bottom view of a lifting device having a rope drum.

FIG. 7 is a plan view of a lifting device with a chain guide and a chain store for the unloaded chain ends.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission housing 1a Built-in chamber for electronic control device 2 Electric motor 3 Load control device 3a Load moment limiter 4 Electronic control device 5 Transmission device 6 Chain wheel 6a Pocket type chain wheel 7 Rope drum 8 Inner teeth 9 Driven pinion 10 Chain Guide 11 Driven Shaft 12 Rope Traction Device 13 Chain Traction Device 14 Transmission Device Stage 15 Transmission Device Stage 16 Transmission Device Final Stage 17 Sealing Member 18 Load Bearing Frame 19 Pinion Shaft 20 Suspended Eye 21 Chain Accumulator 22 Chain 23 Rope 24 Interface RS Working circle radius in rope traction device RK Working circle radius in chain traction device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Harald Bitsch, Federal Republic of Germany, Day 58456 Witten, Karl-Legien-Strasse 46 (72) Inventor Jurgen Hein, Federal Republic of Germany, Day 44379 Schulte-Wuithaus, Germany -Strasse 13

Claims (13)

[Claims] 1. A lifting device actuated by a traction means, comprising a transmission housing, an electric motor, a load control device, and a built-in chamber for an electronic output device or electronic control device, the rope traction device (12) and Chain traction device (1
For 3) the same electric motor (2) and the same transmission (5) are provided so that rope forces or chain forces of the same efficiency are applied to the chain wheel (6) and rope drum (7) radius of action ( A lifting device actuated by a traction means, characterized in that it is designed to act on RK; RS). 2. The same load moment limiter (3a) for the rope traction device (12) and the chain traction device (13) and the same built-in chamber (1a) for the electronic control unit (4). The lifting device actuated by the traction means according to claim 1, wherein the lifting device is provided. 3. A driven pinion (9) meshes with a rope drum (7) provided with an inner tooth portion (8), and a pocket type sheave (6a) is attached to a radius of action of a rope (23) in a driving device. 3. Lifting device actuated by traction means according to claim 1 or 2, characterized in that the same or nearly the same transmission driven torque as with the chain (22) in (1) can be generated. 4. Selectively assembling the rope drum (7) with the inner toothing (8) and the driven pinion (9),
Alternatively, depending on whether the pocket chain wheel (6a) is attached to the driven shaft (11) of the transmission device (5), the rope traction device (1
2) or a lifting device actuated by traction means according to any one of claims 1 to 3, characterized in that a self-supporting module for the traction device (13) for the chain is formed. . 5. A transmission (5) for both the rope traction device (12) and the chain traction device (13).
Lifting device actuated by traction means according to any one of claims 1 to 4, characterized in that a transmission housing (1) integral with the is provided. 6. A gear and a pinion may be provided in the transmission (5), the gear and the pinion being a flat transmission, a coaxial transmission, an angle transmission and a chain traction transmission. A lifting device actuated by the traction means according to any one of claims 1 to 5, characterized in that it can be taken out from a tooth box module consisting of a device and a rope traction device transmission. . 7. The inner toothing (8) has a driven pinion (9).
7. Actuated by the traction means according to any one of claims 1 to 6, characterized in that it forms a transmission end stage (16) of the rope traction device (12) in cooperation with it. Lifting device. 8. All transmission stages (14, 15, 1)
Lifting device actuated by the traction means according to any one of claims 1 to 7, characterized in that 6) is formed semi-permanently lubricated and sealed. 9. The method according to claim 1, wherein a sealing member (17) is provided on a transmission final stage (16) having inner teeth of the rope traction device (12). A lifting device actuated by the traction means according to any one of the items. 10. A frame (18) carrying a load of a chain guide (10) carrying a load or a rope traction device (12) selectively in a transmission housing (1).
The lifting device actuated by the traction means according to any one of claims 1 to 9, wherein the lifting device is attachable. 11. In the chain traction device (13), the load moment limiter (3a) is mounted directly on the pinion shaft (19) of the last transmission stage (14) of the transmission (5). Claims 1 to 10 characterized
A lifting device actuated by the traction means according to any one of the above. 12. The rope traction device (12) is directly attached to the pinion shaft (19) of the penultimate transmission stage (16) of the penultimate transmission (5) of the transmission (5). A lifting device actuated by the traction means according to any one of claims 1 to 10. 13. A method according to claim 1, characterized in that the same load moment limiter (3a) is provided for rope traction devices (12) and chain traction devices (13) of the same load capacity. Item 13. A lifting device actuated by the traction means according to any one of items 12.