JPS6330648A - Self-braking method in rotor and device thereof - Google Patents

Abstract

PURPOSE:To brake turning force with its own strength as well as to aim at energy saving, by making the load introduced into the endless transmission belt stretched across the driven wheel body loosely fitted in a main shaft of a sun gear and a compound planetary gear via a load wheel body and a lever act on the input side. CONSTITUTION:A sun gear 28 is clamped to a main shaft 21, and a load transmission chain wheel 36 having a holding plate 27, a driven chain wheel 33 and chain wheels 72 and 81 and a connecting holding plate 39 are held there. On the other hand, a compound planetary gear 52 consisting of a spur gear 53 engaging on a pitch circle of the sun gear 28 and a side chain wheel 54 interlocking with the driven chain wheel 33 by a main drive chain 60 as one body with this spur gear and a lever 62 supported on a holding shaft 47 between these holding plates 27 and 39 free of rotation. In this lever 62, a load chain wheel 79 to be engaged with the outside of the main drive chain 60 is held on a small shaft 74 free of rotation, and the connecting chain 70 welded to the chain wheel 72 is engaged with the tip. And, a load introducing chain 82 is installed in the chain wheel 81. Accordingly, the load imposed on the chain 82 makes the compound planetary gear 52 come to a standstill via the lever 62, thus self-braking and energy saving are attainable.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application This invention relates to a transmission device, and more specifically, to a self-braking method and device for a rotating body.

B. Conventional technology Conventional self-braking function within a rotating body (function to control rotation)
This can be seen in the worm reducer. However, the self-braking function of this worm reducer depends on the combination of materials and the degree of lubrication, but it is generally 1:
When the reduction ratio is within the range of 10 to 1:15, and the reduction ratio is less than that, the worm exceeds the limit angle of helical winding angle and slips, and the purpose of self-braking cannot be achieved.

In addition, various hoisting machines such as winches and chain blocks require precision parts such as pawls, ratchet wheels, and brake plates for the braking device.

In other braking devices such as brake linings, the braking force becomes zero when the brake is released, and corresponding measures have been required. For example, the driver's conscious energy, or attentiveness, is required to operate the main equipment while the brakes are released, and then apply the brakes by a predetermined mechanism or means once the intended operation has been completed. there were.

Furthermore, if the input source is manually operated, it is extremely difficult to prevent accidents due to operational errors.

Furthermore, in the case of devices whose brake input source requires electronic energy such as electromagnets, it is necessary to take measures to prevent accidents by compensating for wear of the braking components due to long-term use or maintaining the circuit. There were drawbacks such as:

C. Problems to be Solved by the Invention As mentioned above, the conventional braking device for a rotating body requires a certain number of parts and an external force, and there are also concerns about safety. In order to improve these points, the technical problem of the present invention is to provide a method of imparting a braking function to the rotating body itself and a device used to carry out the method. .

D. Means for Solving the Problem The first invention provides a composite planetary gear which is arranged in mesh with the pitch circle of the sun gear, and a driven wheel body (the above-mentioned A load introduced by a lever through a load wheel onto a transmission cable strung endlessly between the compound planetary gear and This is a self-braking method for a rotating body, characterized in that it is used on the input side.

The self-braking device for a rotating body of the second invention is such that a composite planetary gear having a wheel for a transmission cable on its side is rotated onto a pitch circle of a sun gear via a holding shaft fixed to a rotating holding plate. The transmission cable is disposed on a transmission cable striated endlessly between the composite planetary gear and the driven wheel body which is rotatably loosely fitted onto the main shaft of the sun gear. A screw whose base part is coaxially and rotatably fitted with the compound planetary gear and whose load wheel is rotatably supported at a fixed position,
The load introduced through the load wheel is applied to the input side.

E. Effect In the second invention, the composite planetary gear is disposed on the input side of the sun gear, and the driven wheel body is rotatably loosely fitted onto the main shaft of the sun gear. The base of the screw is coaxially and freely rotatably fitted with the input-side compound planetary gear, and the load wheel is rotatably and loosely fitted in a fixed position via the small shaft.
The tip extends toward the load side.

The load wheel body is placed on the transmission cable body.

In such a state, when a load is applied to the tip of the screw, this load presses the load wheel onto the transmission cable, and at the same time, using this pressing contact point as a fulcrum, the compound planet is transferred through the base of the screw. An attempt is made to rotate the gear in the direction of the load, and one side of the transmission cable on the opposite side of the load wheel attempts to rotate the compound planetary gear in the input direction, creating tension thereon, causing tension in this transmission cable. The tensions counteract the composite planetary gears in opposite directions and become static friction, which is held in the moorings including the composite planetary gears, driven wheels, etc.

When the static friction in this input region and the moment acting on the air space between the load point of the screw and the shaft center in the load region are balanced, this compound planetary gear can roll in either direction. Unable to do so, he remains stationary. Here, the ring body of this composite planetary gear is endowed with a self-braking function.

The balanced position of the load about the axis varies depending on the distance between the base of the lever and the load wheel. In other words, as this distance becomes smaller, the pressing force of the load wheel against the transmission cable becomes stronger due to the lever principle, and the tension on the transmission cable increases, correspondingly, the axis center The position of the load centered at is also moved in the centrifugal direction.

Conversely, if the distance between the base of the screw and the load ring increases, the distance between the axis and the load point decreases. That is, as described above, the position of the load wheel in the input region and the load balance point in the load region are in an inversely proportional relationship.

In order to cause the device of the present invention under a load to rotate in the input direction, it is sufficient to apply an input that exceeds the frictional force in the engagement in accordance with the desired output.

Example Embodiments of the present invention will be described. First Figures 1 to 5
Referring to the figure, the main shaft 21 is formed of an insertion boss 103, an attachment flange-like base 23, and a plurality of stepped portions in this order from the bottom. Any means in place (
(not shown), and the base plate 22 has an insertion hole 1.
The boss 103 of the main shaft 21 is inserted into the hole 104, and the collar-shaped base 23 is inserted into the base 2 described above.
2 with a plurality of vaults 24 24. Although the main shaft 21 is mounted vertically in the illustrated example, it can be mounted in any position depending on the purpose of use.

At the first step from the bottom of the main shaft 21, there is a rotation holding plate 27.
is rotatably mounted. Bearings 26 and 2 are connected to the base 100 of the rotary holding plate 27 via a retaining ring 25.
6 is fitted, and a mounting hole 101 is bored at the tip.

At the information stepped portion of the rotation holding plate 27, a sun gear (external spur gear in the illustrated example) 28 is rotated perpendicularly to the main shaft 21 by a key 29.
That is, it is fixed in a horizontal position and cannot rotate. A spacer 30 is fitted over the entire gap between the sun gear 28 and the rotation holding plate 27 described above.

There is a retaining ring 31 in the center of the information step part of the sun gear 28.
A driven wheel body (the illustrated example is a chain wheel, hereinafter referred to as a driven chain wheel) 33 is fitted with a bearing 32 via the bearing 32 so as to be freely rotatable. A spacer 34 is fitted over the entire gap between the driven chain wheel 33 and the sun gear 28 described above.

A spacer 35 is fitted in the information of the driven chain 33, and a double row load transmission chain wheel 3 is attached in contact with this spacer 35.
6 is rotatably loosely fitted to the main shaft 21 via a retaining ring 37 fitted to the center thereof and bearings 38, 38.

A connecting holding plate 39 is loosely fitted to the stepped portion of the double-row load transmission chain wheel 36 so that its base 40 can rotate freely.

A bearing 42 is fitted into the base 40 via a retaining ring 41, and a connection hole 43 is bored at the tip. A spacer 44 is fitted over the entire area in the gap between the base 40 and the double-row load transmission chain wheel 36, and the side surface of the upper end of the base 40 is fitted with a spacer 45. It is held in a fixed position by a retaining ring 45 via.

In the mounting hole 101 at the tip of the rotary holding plate 27, a threaded portion 102, in which the holding shaft 47 extends from its base (flange-shaped) 48 in parallel to the main shaft 21, is inserted into the mounting hole 101 with a nut 49. It is fixed. A threaded portion 50 is formed at the stepped portion at the tip. The aforementioned connecting and holding plate 39 is fixedly connected to this threaded portion 50 by a nut 51 through its mounting hole 43.

Reference numeral 52 is a composite planetary gear consisting of a main spur gear 53 and a transmission cable wheel (the illustrated example is a chain wheel, hereinafter referred to as a side chain wheel) 54 having approximately the same diameter as the main spur gear. Although it is fixed to the side surface of the main spur gear 53 by a bolt 55, it is desirable that the two be integrally formed if possible. This side chain wheel 54 is fitted with bearings 57, 57 through a retaining ring 56 in the center along with the above-mentioned main spur gear 53, so that one composite planetary gear 52
Configure. The composite planetary gear 52 is rotatably loosely fitted to the lower step portion of the holding shaft 47, and its teeth 58 are rotatably arranged on the pitch circle of the teeth 59 of the sun gear 28. It is set up. The appropriateness of this meshing under a load condition is determined by a connecting holding plate that has one end fixed to the threaded portion 50 at the tip of the holding shaft 47 with a nut 51 and the other end loosely fitted to the tip of the main shaft 21. 39. Further, the side surface of the aforementioned side chain wheel 54 must be arranged so as to be on the same horizontal plane as the side surface of the aforementioned driven chain wheel 33.

The side chain wheel 54 of the composite planetary gear 52 and the aforementioned driven chain wheel 3
3, there is a transmission cable (a general term for chains, timing belts, V-belts, and other belts, but the illustrated example shows a chain. Hereinafter referred to as the main chain) 6
0 is arranged endlessly and in mesh with a slight slack. If this slack is larger than necessary, the tension of the main chain 60 will decrease and the self-braking rate will decrease. On the other hand, when the gear is taut without slack, the self-braking rate increases, but the compound planetary gear 5
The running performance in the input direction of No. 2 becomes worse.

A spacer 61 is provided on the upper surface of the composite planetary gear 52 to hold the spacer 7.
The screw 6 is inserted in contact with this spacer 61.
The base portion 63 of No. 2 is rotatably fitted with play. Bearings 65, 65 are connected to this base 63 via retaining rings 64.
are fitted.

Further, the upper end of the aforementioned base portion 63 is held in a fixed position by a retaining ring 67 via a spacer 66.

A pin hole 68 is bored at the tip of the screw 62, and one end of a short chain (hereinafter referred to as a connecting chain) 70 is locked into this pin hole 68 via a pin 69, and this connecting The other end of the chain 70 is connected to the double-row load transmission chain wheel 3 described above.
It is locked to a chain wheel 72 on one side of 6 by any means such as pinning or welding (welding in the illustrated example). That is, the lever 62 and the double-row load transmission chain wheel 36 are connected by this connection chain 70. Although not shown in the drawings, it is also possible to use a connecting rod instead of the connecting chain 70. This screw 52 is formed into a shape of a ``F'' at an arbitrary point, and a small shaft 74 is located near the intersection of the two sides of the ``F'' at one end, pointing downward in the figure, as shown in FIG. The base 75 is connected to the nut 76 through the formed threaded portion 105.
It is fixed by. A load wheel body (the illustrated example is a chain wheel, hereinafter referred to as a load chain wheel) 79 is loosely fitted into the small shaft 74 so as to be freely rotatable.

A bearing 78 is fitted into the center of the load chain wheel 79 via a retaining ring 77, and the shaft retaining ring 106 prevents the load chain wheel 79 from falling off from the small shaft 74. is held constant. And this load chain wheel 7
9 toothed portions 80 are fitted on the outside of the main chain 60 described above.

The chain wheel 81 on the second side of the double-row load transmission chain wheel 36 has a load source chain wheel (not shown) connected to a load introduction chain 82.
It is stretched endlessly between. The load is this chain 8
2 and is transmitted to the lever 62 via the connecting chain 70.

Next, an experimental example based on the embodiment shown in FIG. 1 will be disclosed using schematic diagrams shown in FIGS. 6 and 7.

The dimensions of each component corresponding to each symbol shown in FIG. 1 are as follows.

Furthermore, in the schematic diagram, a connecting cable 108 replaces the double-row load transmission chain wheel 36, a load introducing cable 83 replaces the load introducing chain 82, and this load introducing cable 83
A pulley 84 is used to guide the. Although not shown, this pulley 84 is externally supported, and the load is indicated by W.

Code Name Model Size 2
8 Sun gear module 2 Number of teeth 1005
3 (52) spur gear module 2 number of teeth 4054
(52) Side chain wheel JIS40 Number of teeth 2033
Driven chain wheel: JIS 40 Number of teeth: 1579 Load chain wheel: JIS 40 Number of teeth: 1760 Managing chain: In this experimental apparatus installed in accordance with JIS 40 or above, a load W is placed at the tip of the cable 83 at the arrow a.
When applied in the direction indicated by arrows M and N, this load W forces the compound planetary gear 52 through the lever 62 to counteract the directions indicated by the arrows M and N, thereby bringing it to a stationary state. In other words, it is self-braking. The load balance relationship in this self-braking state is as follows.

(a) Distance between the axial center of the composite planetary gear 52 and the axial center of the load chain wheel 79. 80 (a) Distance between the axial center of the load chain wheel 79 and the axial center of the main shaft 21. 80 (c) The load point between the axis of the main shaft 21 and the tip of the screw 62 (pin hole 68
) distance. 25 According to the above experimental results, the self-braking position is at 1/4 of the radius of 100 m/m of the sun gear 28. Therefore, if the input is set on the pitch circle of the sun gear 28, the reduction ratio will be 1:4, which is an area that cannot be achieved with conventional braking mechanisms.

The driven chain wheel 33 described above may have the same diameter as the side chain wheel 54 of the composite planetary gear 52, but in order to set the number of links of the main chain 60 and obtain an appropriate slack, it is necessary to have the same diameter as the side chain wheel 54 of the composite planetary gear 52. It was a long time ago.

The load point 68 described above can always maintain a balanced state and maintain the braking function regardless of load fluctuations.

Another embodiment is disclosed with reference to FIG. That is, in the embodiment shown in FIG. 1, another compound planetary gear 85 having the same shape as the compound planetary gear 52 is increased along with the holding height 6, so that the number of compound planetary gears is two. , the double-row load transmission chain wheel 36 is omitted for convenience. In this embodiment, the main chain 60 is longer than in the embodiment shown in FIG. 1, which reduces wear on the chain 60 and extends its life. In addition, in the embodiment shown in FIG. 1, since there is only one connection point on the sun gear 28, self-braking is unstable.
In this embodiment, since there are two locations, the degree of antagonism is stable and the self-braking rate is good.

Another embodiment will be disclosed with reference to FIG. In other words, in FIG. 5, a composite planetary gear 88 is installed on the side chain wheel 54 of the composite planetary gear 52 in place of the timing pulley 87, and a primary chain 6 is installed on the driven chain wheel 33, the driven timing pulley 89, and the main chain 6.
0 is replaced with a timing belt 90, the load chain wheel 79 is replaced with a U-shaped load wheel 91, and the compound planetary gear 88 and the driven timing pulley 89 have the same diameter. Although not shown in the drawings, this U-shaped cross-section wheel 91 has a bearing fitted in its center, similar to the load chain wheel 79 described above. Further, the double-row load transmission chain wheel 36, the lever 62, the connecting holding plate 39, etc. are omitted for convenience. In this embodiment, the timing belt 9
0 has more elasticity than the main chain 60 and has a smaller coefficient of friction, so the self-braking rate is inferior to that of the first embodiment, but
It makes less noise when running and is lighter in weight.

Another embodiment is disclosed with reference to FIG. That is, the ninth
In the illustrated embodiment, another composite planetary gear 92 having the same shape as the composite planetary gear 88 is increased to two. In this embodiment, the timing belt 90 is longer than the embodiment shown in FIG. 9 described above, so that wear of the timing belt 90 is reduced and its life is extended. Furthermore, since there are two points of opposing tooth alignment on the sun gear 28, the self-braking rate is better than in the embodiment shown in FIG.

Another embodiment will be disclosed with reference to FIG. That is, the first
In the illustrated embodiment, a sun gear 93, which is an internal spur gear, is used in place of the sun gear (external spur gear) 28. Its self-braking rate is almost the same as that of the embodiment of FIG. 1, but the appearance is better because the device can be housed within the sun gear 93.

Another embodiment will be disclosed with reference to FIG. That is, the first
This figure shows a state in which two compound planetary gears are used in the embodiment shown in FIG. 1, and as in the case of the embodiment shown in FIG. The rate is good.

Another embodiment will be disclosed with reference to FIG. That is, in this embodiment, the screw is not directly held on the holding shaft 47 of the compound planetary gear 52 like the screw 62 described above.

That is, it is rotatably held on a support shaft 96 which is located on the holding shaft 47 and is fixed to the tip of an arm pole 95 which is fixed by a key (not shown) and a nut 94 etc. adjacent to the compound planetary gear 52. , the base body is formed in a straight shape and a straight lever 47
becomes. A load wheel 79 or 91 is rotatably held at a fixed position, and a connecting pin hole 68 is bored at the tip. With this configuration, the load efficiency is better than the above-mentioned U-shaped lever 62. In other words, in the case of the shape, the load force line acts in the centripetal direction on the main shaft 21, as shown by the arrow b indicated by the chain double-dashed line in FIG. Since it acts in the direction of the arrow c shown by the chain line, that is, in the centrifugal direction on the main shaft 21, a difference occurs in the load moment around the main shaft 21, and in this embodiment, the load moment is caused by this difference. Improves self-braking rate.

Another embodiment will be disclosed with reference to FIG. That is, in the above-mentioned FIG. 13, the center portion of the lever is a T-shaped lever 98 that protrudes downward in the figure. A load chain wheel 79 or a load timing pulley 99 is rotatably supported at the tip of this protrusion. This load wheel body 79 or 99 is placed in mesh with the inner side of the main chain 60 or the timing belt 90.

The self-braking rate is almost the same as that of the embodiment shown in FIG. 13 described above.

G. Effects of the Invention According to the present invention, braking of the rotational force of the rotating body can be achieved by one's own effort without requiring a braking member such as a pawl, a ratchet, or a brake plate. It is possible.

Energy is saved because no external force is required to brake the rotating body.

Furthermore, if it is installed as a reverse rotation prevention device on a conveyor or other conveyor, safety can be improved and the device can be simplified.

There are other effects.

BRIEF DESCRIPTION OF 4 FIG. 1 is a plan view of an embodiment of the present invention, showing a double-row load transmission chain wheel with a portion cut away and the base plate omitted.

FIG. 2 is a front view of FIG. 1.

FIG. 3 is a sectional view taken along line A--A in FIG. 1, with the chain omitted.

FIG. 4 is a sectional view taken along line BB in FIG. 1.

FIG. 5 is a sectional view taken along line CC in FIG. 2.

6 and 7 are schematic diagrams of the experimental apparatus of the embodiment shown in FIG. 1.

FIG. 8 shows that in the embodiment of FIG. 1, two compound planetary gears are used.
FIG. 3 is a plan view showing a double-row load transmission chain wheel in a single state with the double-row load transmission chain wheel omitted.

FIG. 9 is a plan view of an alternative embodiment shown in FIG. 5, in which the chain and chain wheel are replaced with a timing belt, a timing pulley, and a wheel having a U-shaped cross section, respectively.

FIG. 10 is a plan view showing a state in which there are two composite planetary gears in the embodiment of FIG. 9.

FIG. 11 is a plan view showing the embodiment of FIG. 1 in which an internal spur gear is used as the sun gear, with the double-row load transmission chain wheel omitted.

FIG. 12 shows the composite planetary gear 2 in the embodiment shown in FIG.
FIG.

Figure 13 shows the embodiment shown in Figure 1, with the lever attached to the tip of the arm rod coaxially fixed to the compound planetary gear, but without the double-row load transmission chain wheel. FIG.

FIG. 14 is a plan view showing a state in which a T-shaped screw is used in the embodiment of FIG. 13.

21...Main shaft, 22...Base, 27...Rotation holding plate, 28...Sun gear (outer spur gear), 33...
... Driven chain wheel, 36... Double row load transmission chain wheel,
47...Holding shaft, 52...Compound planetary gear, 60
...Chief Qian, 62...Glyph lever to..., 79
... Load chain wheel, 88 ... Compound planetary gear (timing pulley on the side), 89 ... Followed timing pulley, 90 ... Timing belt, 91 ... U-shaped cross section Load wheel, 93...Sun gear (internal spur gear), 97...Straight lever, 98...T-shaped lever, 99...Load timing pulley.

Claims (23)

[Claims] (1) Transmission that is stretched endlessly between a compound planetary gear that is arranged in mesh on the pitch circle of the sun gear and a driven wheel body that is rotatably loosely fitted on the main shaft of the sun gear. A self-braking method for a rotating body, characterized in that a load introduced onto the rope by a lever through a load wheel is applied to the input side. (2) A compound planetary gear equipped with a wheel for a transmission cable on its side surface is disposed in mesh with the pitch circle of the sun gear so that it can roll freely through a holding shaft fixed to a rotation holding plate, On a transmission cable strung endlessly between the composite planetary gear and a driven wheel body rotatably loosely fitted onto the main shaft of the sun gear, the composite planetary gear and the transmission cable are attached to the base thereof. A load introduced via the load wheel is applied to the input side by a screw that is rotatably and loosely fitted on the same axis and a load wheel is rotatably and loosely fitted at an arbitrary position. Self-braking device for rotating bodies. (3) A self-braking device for a rotating body according to claim 2, wherein the main shaft is mounted in a vertical direction. (4) The sun gear is an external spur gear.
A self-braking device for a rotating body as described in Section 1. (5) The sun gear is an internal spur gear.
A self-braking device for a rotating body as described in Section 1. (6) The number of compound planetary gears is one
A self-braking device for a rotating body as described in Section 1. (7) The number of compound planetary gears is two.
A self-braking device for a rotating body as described in Section 1. (8) The self-braking device for a rotating body according to claim 2, wherein the wheel for the transmission cable on the side surface of the composite planetary gear is a chain wheel. (9) The self-braking device for a rotating body according to claim 2, wherein the wheel for the transmission cable on the side surface of the composite planetary gear is a timing pulley. (10) The self-braking device for a rotating body according to claim 2, wherein the driven wheel loosely fitted on the sun gear main shaft so as to be rotatable is a chain wheel. (11) The self-braking device for a rotating body according to claim 2, wherein the driven wheel loosely fitted on the main shaft of the sun gear so as to be rotatable is a timing pulley. (12) A self-braking device for a rotating body according to claim 2, 8, or 10, wherein the transmission cable is a chain. (13) A self-braking device for a rotating body according to claim 2, 9, or 11, wherein the transmission cable is a timing belt. (14) The load wheel is a chain wheel.
A self-braking device for a rotating body according to item 1 or 12. (15) The self-braking device for a rotating body according to claim 2 or 13, wherein the load wheel is a wheel having a groove portion having a U-shaped cross section. (16) A self-braking device for a rotating body according to claim 2 or 13, wherein the load wheel is a timing pulley. (17) A self-braking device for a rotating body according to claim 2, 14, or 15, wherein the load wheel body is placed in mesh with the outside of the transmission cable body. (18) A self-braking device for a rotating body according to claim 2, 14, or 16, wherein the load wheel body is placed in mesh with the inside of the transmission cable body. (19) A self-braking device for a rotating body according to claim 2, wherein the lever is in the shape of a square. (20) Self-braking in a rotating body according to claim 19, wherein the tip of the lever is connected by a chain to a double-row load transmission chain wheel that is rotatably loosely fitted to the sun gear main shaft. Device. (21) In the rotating body according to claim 2, wherein the screw is rotatably and loosely fitted to the end of the arm rod coaxially fixed adjacent to the composite planetary gear. Self-braking device. (22) Claim 2, wherein the lever is T-shaped;
Or a self-braking device for a rotating body according to item 21. (23) A self-braking device for a rotating body according to claim 2, wherein the holding shaft of the composite planetary gear is rotatably connected to the main shaft via a connecting holding plate at one end thereof.