JPS6121449A - Driving part structure - Google Patents

Abstract

PURPOSE:To maintain operation on the output side in a stable manner, by a method wherein a reverse rotation preventing mechanism is located to an input shaft or an intermediate shaft, and rotation on the input side is automatically selectively transmitted and reduced in a multistep depending upon a fluctuation in a load to transmit the rotation to the output side. CONSTITUTION:With a handle 25 rotated clockwise, a handle shaft 21 is moved backward to screw a screw part 18A in a female screw part 22, and the handle shaft 21 and an input shaft 1A are rotated integrally. When the output load of a driven part is within the set value of an overload protection part 8, handle shafts 1A and 1B are rotated integrally, an outer wheel 7 of a reverse rotation preventing part 5B is prevented against reverse rotation. Thereby, an output shaft 2 is rotated through rotation of an input shaft 1B in linkage with the outer wheel 7, and a driven part is driven through a rack 15. Meanwhile, when the output load of the driven part exceeds a given value, the input shafts 1A and 1B are separated from each other, the outer wheel 7 of a reverse rotation preventing part 5A is rotated integrally with an inner wheel 6, and reduction is effected through an intermediate shaft 3 and a gear 11 to slowly drive the driven part.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a drive structure having a multi-stage transmission mechanism used for elevating and lowering devices for gates such as tide protection products, winches, etc. This invention relates to a drive structure that automatically changes gears in multiple stages in response to load fluctuations.

"Prior Art" and "Problems to be Solved by the Invention" Conventionally, there are many known examples of the elevating device for the above-mentioned tide gates. However, for example, when raising a tide door,
Due to the water pressure applied to the tide door, the sliding resistance between the tide door and the lifting guide frame, etc., the lifting load increases significantly at the beginning of the ascent.
When the door starts to rise, the lifting load is qualitatively reduced to the door's own weight, and when it descends, there is a similar fluctuation in the pulling load due to water pressure resistance, etc. Therefore, for example, when using a manual lifting device, an extremely large pulling blade is required at the beginning of lifting, so the reduction ratio of the lifting device must be large, so even when the load is light, the hoisting speed will be slow and certain operations will be difficult. A new multi-stage system that automatically selects the gear train of the reduction system according to changes in the load and smoothly and accurately raises and lowers gates on the output side. The object is to provide a drive structure having a transmission mechanism.

"Means for Solving the Problems" First, referring to FIG. 1 showing the basic concept of the present invention, in the figure, IAIB is an input shaft, 2 is an output shaft, 3 is an intermediate shaft,
Reference numeral 8 indicates an overload isolation protection section provided at the connection position of the input shaft IAIB, and reference numeral 5A5B indicates a reverse rotation prevention section provided at the input shaft IAIB. That is, the drive section structure of the present invention has a separate input shaft IAI.
B are arranged in series on the same axis and connected by an overload isolation protection section (hereinafter simply referred to as overload protection section) 8,
A reverse rotation prevention portion 5A5B is provided in the middle of the input shaft IAIB. Here, the overload protection unit 8 cuts off the connection of the input shaft IAIB when the load value exceeds a preset value, and connects the input shaft IAIB when the load value is less than the preset load value, and transmits rotation as a - shaft body. This is a known overload separation protection mechanism, and the reverse rotation prevention part 5A5B has a structure in which a cam is combined between the inner ring 6 and the outer ring 7, and allows rotation in only one direction of the inner ring 6 or outer ring 7, and prevents reverse rotation. This is a reversal prevention mechanism that means a known cam clutch that accurately prevents reversal. Two gears 10.12 are fixed to the intermediate shaft 3 and mesh with gears 9.11 provided on the outer ring 7 of the reversal prevention part 515B, and furthermore, the reversal of the input shaft IB near the output shaft 2 is prevented. The gear 11 of the outer ring 7 of the prevention part 5B is a gear 1 fixed to the output shaft 2.
It meshes with 8. Note that the inner ring 6 is fixed to each input shaft IAIB, and the outer ring 7 is fixed to the input shaft IAIB.
It can be rotated freely. And the gear 10.12 of the intermediate shaft 3
The rotation caused by this is a decelerated rotation.

"Function" In the drive structure of the present invention consisting of the above-mentioned basic configuration, when the output load W is within a preset load value, the overload protection section 8 connects the input shaft IAIB to the inside and outside of the reverse prevention section 5B. The rings 6.7 work together to rotate the output shaft 2, and the rotation of the intermediate shaft 8 causes the inner and outer rings 6.7 of the reverse rotation preventing portion 5A to idle, so that the output load W is hoisted at a high speed.

Furthermore, when the output load W exceeds the set load value, the overload protection section 8 is activated, the connection of the input shaft IAIB is cut off, and the rotation of the input shaft IA is caused to pass through the reverse rotation prevention section 5A and the intermediate shaft 8. The output load W is hoisted at a low speed.

That is, the drive unit structure of the present invention has the effect of automatically selecting the gear train of the reduction system in response to fluctuations in the output load W and adjusting the speed on the output side in a multi-stage variable speed manner.

In addition, the gear in the present invention means a rotating body that transmits rotation between shafts, and can be replaced with a chain wheel or a belt wheel, and structures resulting from these substitutions are also included in the gist of the present invention.

"Example" Hereinafter, a detailed explanation will be given with reference to an example. First, FIG. 2, which shows one embodiment of the invention, shows a lifting device for a tide door using the drive structure of the present invention. In the figure, the input shafts IAIB are arranged on the same axis, and there is an overload protection section 8 at the joint part.
is provided in the middle of the input shaft IAIB, and a reversal prevention part 5A5B is provided in the middle of the input shaft IAIB, which allows the inner ring 6 and the outer ring 7 to rotate freely (idle rotation) in the clockwise direction when viewed from the left side in FIG. 2, and prevents rotation in the opposite direction. is provided. The inner rings 6 are each fixed to the input shaft IAIB, and the outer ring 7 is provided with a gear 9.1.
1 are integrally formed, gears 9.11 mesh with gears 10.12 fixed to intermediate shaft 3, and rotation via intermediate shaft 8 by gears 9.10 and 12.11 is reduced by h. It is configured with a gear ratio of .

A gear 13 fixed to the output shaft 2 meshes with the gear 11 of the reverse rotation prevention part 5B, and when the output shaft 2 rotates, another gear 14 provided on the output shaft 2 rotates, and the elevating rack meshes with the gear 14. 15 moves up and down as shown in Figure 3, and the tide door 1
Raise and lower 6.

On the other hand, in the vicinity of the left end of the input shaft IA, two identical screw parts 18A and 18B with left-hand threads are formed with a gap between them, and a bulging stop collar is formed at the left end of one input shaft. There is part 19. The stopper part 19 is connected to the handle shaft 2.
The handle shaft 2 is slidably fitted into the hollow part of the handle shaft 2.
A female threaded portion 22 is cut in the front end of the threaded portion 1.
8 A 18 B can be screwed into the female threaded portion 22 .

Additionally, a slidable friction plate 20 is installed between the reverse rotation prevention part 5A and the handle shaft 21.
When the front end 24 of the rotor 1 comes into pressure contact with the reverse rotation prevention part 5A through the friction plate 20, the friction plate 20 acts so that the inner ring 6 and the outer ring 7 of the reverse rotation prevention part 5A are rotated synchronously as one unit. .

Further, the input shaft IA is provided with another reverse rotation preventing portion 5C, the outer ring 7' of which is formed as a band brake drum.

In addition, both of the input shaft IAIB output shaft 2 intermediate shaft 3 are
Although not shown, it is housed in the housing of the device and supported by its bearing. In addition, 25 in the figure is a handle, 26 is a lifting device for the seawall using the drive structure, 2
7 is a seawall.

The drive section structure having the above configuration operates as follows.

That is, when raising the seawall 16, when the handle 25 is rotated clockwise to the right, the handle shaft 21 retreats and the threaded part 18A and the female threaded part 22 are screwed together (solid line in the figure), and the handle shaft 21 and the input shaft IA rotates as one. When the output load W of the tide barrier 16 is within the preset load value of the overload protection section 8, the handle shaft IAIB rotates integrally, and the reverse rotation prevention section 5B receives the reverse rotation load due to the output load W. The outer ring 7 is prevented from reversing, and the input shaft IB and the outer ring 7
The output shaft 2 is rotated in conjunction with the output shaft 2, and the tide barrier is raised by the ridge 15 at high speed. Note that at this time, the outer ring 7 of the reverse rotation preventing portion 5A rotating via the intermediate shaft 8 rotates in the same direction as the inner ring 6, so that the inner and outer rings idle.

Then, when the output load W exceeds the set load value, the connection of the input shaft IAIB is cut off, and at the same time, the outer ring 7 of the reversal prevention part 5A, which receives the reversal load due to the output load W, becomes one piece, The rotation of the handle 25 is transmitted and decelerated via the intermediate shaft 3 and the gear 11 of the outer ring 7 of the reverse rotation prevention part 5B, and the tide barrier 16 is gently pulled up.

On the other hand, when lowering the tide barrier 16, when the handle 25 is rotated to the left, the handle shaft 21 moves forward to the dotted line position shown in the figure, and its front end 24 presses against the reverse rotation prevention part 5A via the friction plate 20. The inner and outer rings 6.7 are integrated.

When the output load W due to lowering is within the set load value, the input shaft IAIB is connected, and the reverse rotation prevention part 5B
The inner and outer rings of are spinning. Then, the rotation of the input shaft IA causes the output shaft 2 to rotate at a reduced speed via the intermediate shaft 3 from the closed reverse rotation preventing portion 5A.

When the output load W exceeds the set load value due to water pressure resistance, etc., the connection of the input shaft IAIB is cut off,
The rotation of the input shaft IA is transmitted to the output shaft 2 via the intermediate shaft 8, causing the sea wall 16 to gradually descend.

Furthermore, when the female threaded portion 22 of the handle shaft 21 is positioned between the threaded portions 18A and 18B of the input shaft IA to be in a neutral state, the seawall 16 can be lowered by its own weight. The descending speed is adjusted using the brake part formed on the outer ring 7' of the reverse rotation prevention part 5C. In addition, when the above-mentioned tide barrier 16 raises 71 or stops rising, the brake section applies the brake and prevents the reversal of the power axis IA by the reversal prevention section 5C to prevent the tide barrier 16 from falling. , or used for fixing the input shaft IA when switching in conjunction with raising and lowering operations of the handle 25.

Next, FIG. 4 shows another embodiment of the present invention,
The input shaft mechanisms 28 A 28 B on the primary side and the secondary side having the same configuration as above are provided in duplicate, and the outer rings 7 of the respective reverse rotation prevention parts 5 A 5 B are interlocked with each other, and the input shaft mechanisms on the secondary side 28B is provided with the same intermediate shaft 3 as described above.

According to the above drive unit structure, the set load values of the two overload protection units 8 are set in stages, and the - next side input handle 25
The rotation can be transmitted to the output shaft 2 after being reduced in three steps. In this manner, the drive unit structure of the present invention enables multi-speed operation close to continuously variable speed by configuring a plurality of the input shaft mechanisms.

Next, FIG. 5 shows another embodiment in which the drive section structure of the present invention is used in a manual winch. In the figure, input shaft IAI
B is connected by an overload protector 8 as in the previous embodiment, and a handle 25 is provided at the end of the input shaft IA. The intermediate shaft 3 has a fixed gear 10 and a non-fixed gear 12, and the gears 10 and 12 mesh with gears 9 and 11 fixed to the input shafts IA and IB, respectively. is provided, the inner ring 6 of which is connected to the intermediate shaft 3
The outer ring 7 and the gear 12 are integrated. Further, the gear 11 of the input shaft IB meshes with the gear 18 of the output shaft 2 connected to a drum shaft (not shown). In the hand-wound winch with the above configuration, when the hoisting load is within the set value of the overload protection section 8, the handle rotates 250 times on the input shaft IA.
It is directly transmitted to the output shaft 2 via IB and is hoisted at high speed. Also, when the hoisting load increases, the output shaft IA
At the same time as the connection of the IB is cut off, the reverse rotation prevention part 5 is activated and its inner and outer parts rotate together, and the 250 rotations of the handle are decelerated via the intermediate shaft 8, and the hoisted object is brought to a low speed. It is rolled up. Note that the lowering operation using the manual winch uses the lowering of its own weight by using the brake.

As described above, according to the drive structure of the present invention, when the load on the output side changes, the operating force on the input side is transmitted by changing the range automatically and selectively in response to the change in the output load. , the output side work can be accurately and stably continued by keeping the operating force approximately constant.

The drive section structure of the present invention can be used not only for gates such as flood doors of the above embodiments, but also for a wide range of drive sections for devices whose output load varies under a constant input.

"Effects of the Invention" As explained above, according to the drive structure of the present invention, the rotation on the input side is automatically and selectively transmitted at variable speeds in multiple stages according to fluctuations in the output load. Therefore, the required energy on the input side does not become particularly excessive, and the output side, where the load fluctuates, can continue to operate accurately and stably. There are advantages.

Therefore, when used in the above-mentioned tide door lifting device, the lifting and lowering operation of the tide door becomes simple and smooth, and even if the output load increases due to water pressure, etc., no particularly large operating force is required, and anyone can easily operate it. This has the excellent effect of allowing accurate operation of the flood gate in an emergency.

[Brief explanation of drawings]

Fig. 1 2 Basic conceptual diagram of the present invention, Fig. 2 2 A front view showing the structure of the drive unit of the present invention - an embodiment, Fig. 8: Fig. 2 A front view showing the operation of the embodiment, Fig. 4: Book Basic conceptual diagram of another embodiment of the invention, FIG. 5: Symbols on a front view showing the drive structure of another embodiment of the invention, IAIB: input shaft, 2: output shaft, 3: intermediate shaft, 5A5B5C ! : Reverse rotation prevention part, 6: Inner ring, 7: Outer ring,
8: Overload protection part, 9-14: Gear, 15: Operation rack, 16: Tide door, 18A18B: Thread part, 19: Part of stopper, 21: Handle shaft, 22: Female thread part, 25:
Handle patent applicant Ito Kosakusho Co., Ltd. Agent Patent attorney Kenmi Oka Figure 1

Claims (3)

[Claims] (1) A pair of input shafts connected on the same axis via an overload isolation protection mechanism, an intermediate shaft provided so as to be interlocked via respective rotating bodies on the pair of input shafts, and It consists of an output shaft interlocked with the rotating body on the input shaft on the output side of the input shaft, and the input shaft or intermediate shaft has a reverse rotation prevention mechanism that allows rotation of the rotating body in one direction and prevents reverse rotation. A drive unit structure characterized by a structure that automatically and selectively transmits direct drive by the pair of input shafts or drive via the intermediate shaft depending on load fluctuations of the output shaft. (2) Each of the pair of input shafts is provided with a reversal prevention mechanism, and the reversal prevention mechanism of the input shaft on the input side is provided with an integrated mechanism that prevents the reversal prevention mechanism from idling by press-welding a friction plate. A drive section structure according to claim (1). (3) The drive unit structure according to claim (1), wherein the intermediate shaft is provided with a reverse rotation prevention mechanism.