JPH0446242A - Planetary gear type speed increasing and decreasing device - Google Patents

Abstract

PURPOSE:To improve durability by forming both carriers into discal shape being nearly flat in opposing faces, providing a connecting member penetrating curved plates and contacted with both carriers, and forming screw holes for belt and a through hole for knock pin on it. CONSTITUTION:Curved plates 421, 422 are inserted through with a crankpin 44, a connecting member 55 is provided so as to penetrate the curved plates 421, 422, and carriers 47, 48 are arranged on both side of the curved plates 421, 422. Both ends of the pin 44 are supported with the carriers 47, 48, and after a knock pin (not shown in the figure) is inserted through knock pin holes 61 of the carriers 47, 48 and a knock pin through hole 57 of the connecting member 55 for positioning the whole, the connecting member 55 and the carriers 47, 48 are respectively fixed together with bolts 62, 63. Because the carriers 47, 48 are formed into disklike shape, a set working of over two pieces can be performed, and hence high accurate machining can be performed for holes 49,50 supporting both ends of the pin 44, the hole 61, and bolt holes 60.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a carrier that penetrates a curved plate and provides a carrier on both sides of the curved plate, and supports a crank pin on the carrier so that the curved plate only revolves without rotating. The present invention relates to a type of planetary gear speed increaser/reducer whose motion is restricted so as to allow the carriers to move, and more particularly to an improvement in the structure for connecting the two carriers.

(Prior art) There are various types of planetary gear reducers. Among them, external teeth consisting of trochoids or horse arcs are formed on the outer periphery of a curved plate, and the external teeth are connected to the inner periphery of an internal gear that also serves as a casing. The curved plate is meshed with internal teeth consisting of a pin provided on the crank pin, and the curved plate is only revolved without rotating by the crank pin (hereinafter referred to as
There is a type that is regulated to have a oscillating motion.

In this type, carriers are provided on both sides of the curved plate, and a protrusion is formed on one of the two carriers, and the protrusion penetrates the curved plate and connects it to the other carrier. It has a structure that connects and fixes the carrier.

Examples thereof will be explained below with reference to Figures 2 to 4.

Two eccentric parts 1112 are integrally formed on the hollow input shaft 1, and two curved plates 21.12 are attached to the eccentric parts 15.12.
22 is supported via rollers 3. A plurality of crank pins 4 are installed through each curved plate 2.22, and the eccentric portion 4142 of the crank pin 4 is in eccentric sliding contact with the curved plate 2122 via a needle bearing 5. Both ends of the crank pin 4 are supported by bearings 6 on carriers 7.8 arranged on both sides of the curved plate 27.22. Curved board 2. ．． Trochoidal or arc-shaped external teeth 9 are cut on the outer periphery of the rotary casing 22, and the external teeth 9 mesh with an internal till made of a bottle held in the rotating casing 10. An opening 12 is formed in the curved plate 2122, and a protrusion 3. is formed integrally with one carrier δ through the opening 12. is arranged, and the protrusion f
f1s a l is in contact with the other carrier 7. A through hole 82 is formed in the protrusion 81 . Attach the carriers 7 on both sides through fixing bolts (not shown).
．． 8 are fixed together.

To explain its operation, when the input shaft 1 rotates, the curved plate 2.2□ is restricted from rotating (rotation) by the eccentric portion 18, J2 and the crank pin 4, and performs a rocking motion. Therefore, the outer teeth 9 of the curved plate 2.2□ mesh with the inner teeth 11 of the rotating casing 10, causing the rotating casing 10 to rotate at a reduced speed.

FIG. 5 shows another conventionally known planetary gear reducer, in which the crank pin serves as the shaft for inputting rotation.

That is, a pinion 22 is provided at the end of the input shaft 21,
The shaft nion 22 meshes with an input tooth 24 provided at the end of the crank pin 23. One carrier 251
A protrusion 26 is formed in the two curved plates 27, 27. Carrier of ability 25 through
．． I'm in contact with that. Both carriers 252, 25 are fixed by fixing bolts 28 and support the ends of the crank pins 23. The other configurations are the same as those in FIG. 1, so their explanation will be omitted.

In this type, the rotation of the crank pin 23 causes the eccentric portion 232 of the crank pin 23 to rotate into the curved plate 27. 27. The curved plate 27 rotates while in sliding contact with the curved plate 27.
．． 272 performs a rocking motion. As a result, the curved plate 2
7. The outside of 272 @ 29 is the internal tooth 3 of the rotating casing 30
1, and the rotating casing 30 is rotated at a reduced speed.

(Problem N to be solved by the invention) The conventionally known planetary gear reducer as described above has the following problems and circumstances.

Attach the crank pins (4, 23) to the carriers (7, 8, 25, 252) on both sides of the curved plate (212°, 271.27□).
The structure supports the carriers (7) on both sides.
, 8, 251, 25□) if the position of the hole for supporting the trunk bin is misaligned, an eccentric error will occur. As a result, the rotation transmission characteristics deteriorate and the eccentric portion of the crank pin (4, 23) (414°, 23. 23.
) will cause uneven contact and deteriorate durability.

In addition, in order to accurately perform relative positioning of the carriers (7, 8, 251, 25,) on both sides, positioning using dowel pins 13 and 33 as shown in the figure is required, and dowel hole drilling after temporary assembly or Both carriers at the parts stage (7
, 8,2525□) is required. However, since the conventional carrier (7, 8, 25, 252) has protrusions (8, 26) formed on one side, the structure is complicated, and it is difficult to expect an improvement in accuracy during alignment processing. Moreover, it is not possible to process multiple carriers at the same time.

Furthermore, the end surfaces of the plurality of protrusions (8, 26) formed on one carrier (8, 25,) are connected to the other carrier (7, 2).
5□), the length of each protrusion (8, 26) should be the same, and at the same time, its end face should be at an exact right angle, so that there is no gap between the other carrier (7, 25°). Although they must abut exactly, it is difficult to accurately determine the length and perpendicularity. For this reason, the parallelism of the carriers (7, 8, 25, 25□) on both sides deteriorates, resulting in deterioration of durability due to uneven contact and eccentricity errors.

The purpose of the present invention is to improve the above-mentioned drawbacks of the conventionally known planetary gear reducer, improve the characteristics of rotation transmission, reduce uneven contact at the eccentric part of the crank pin, and improve durability. *Providing speed reducers.

Another object of the present invention is to provide a planetary gear speed reducer having a structure that improves accuracy during alignment and allows simultaneous stacking of a large number of carriers.

Still another object of the present invention is to provide a planetary gear speed reducer in which the parallelism of carriers on both sides is improved to reduce deterioration in durability due to uneven contact and eccentricity errors.

(Means for Solving the Problems) A feature of the present invention is that it includes one or more curved plates having meshing teeth, and members disposed on both sides of the curved plates and penetrating the curved #I plate. two carriers, both of which are fixed by the carriers, and a curved plate that is caused to swing by an eccentric portion that is supported at both ends by the carriers and that eccentrically contacts the curved plate;
In a planetary gear speed increaser/reducer comprising a crank pin of more than 1,000 yen, and a rotating body having teeth that mesh with the curved plate, both carriers are formed into a disk shape with opposing surfaces substantially flat, and the curved plate is A connecting member that penetrates and comes into contact with both carriers is provided, one or more bolt screw holes and a knock pin through hole are formed in the connecting member, and one or more bolt screw holes and a knock pin through hole of the connecting member are formed in both carriers. Both carriers are fixed by forming a through hole that matches the hole, and screwing a fixing bolt into the bolt threading hole from the outside of both carriers.

(Function) In the present invention, a crank pin is inserted through a curved plate, a connecting member is provided to penetrate the curved plate, and carriers are arranged on both sides of the curved plate so that both ends of the crank pin are supported by the carriers. After positioning with the dowel pin, the connecting member is fixed to the carrier.

In this case, since the carrier is disc-shaped, it is easy to perform alignment, so it is easy to machine holes to support both ends of the crank pin, and it is also easy to machine holes for dowel pins and bolts. It is also simple and has good accuracy.

(Example) Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a planetary gear reducer according to an embodiment of the present invention.

Two eccentric parts 4141 □ are integrally formed on the hollow input shaft 41 , and two curved plates 421 and 422 having a disk shape are supported on the eccentric parts 41412 via rollers 43 . ing.

A plurality of crank pins 44 are installed through each of the curved plates 428, 42□, and the curved plates 42, 422, the eccentric portions 44, 442 of the crank pins 44, and the curved plates 42
A needle bearing 45 is provided between 1.42□. Both ends of the crank pin 44 are connected to curved plates 42 by bearings 46. Carrier 4 arranged on both sides of 42□
It is supported in a support hole 49.50 formed at 7.48. Curved plate 42. Trochoidal or arc-shaped external teeth 51 are cut on the outer periphery of 422, and the external teeth 51 mesh with internal teeth 53 made of a bottle held in the rotating casing 52.

The configuration described above is between the conventionally known planetary gear reducer and the road shown in FIGS. 2 to 4, but in the present invention, instead of a protrusion formed integrally with the carrier,
7.38, a connecting member with the following configuration is provided separately.

That is, the curved plate 42. An opening 54 is formed in 422, and a circular connecting member 55 is arranged which abuts the carriers 47, 48 on both sides.

A bolt screwing hole 56 is formed through the connecting member 55, and a knock pin through hole 57 is formed therein. A circular stepped portion 58 into which the connecting member 55 is fitted is formed in the carriers 47.4B on both sides. carrier 47.48
A recess 59 is formed in the recess 59, and a bolt hole 60 that matches the bolt screw hole 56 of the connecting member 55 is formed in the recess 59.
A dowel pin hole 61 is formed that matches the 7-/tube 2 through hole 57. Fixing bolts 62, 63 are used to fix the connecting member 55 from the carriers 47, 48 on both sides.
is provided.

The operation of the planetary gear reducer of the present invention constructed as described above is the same as that of the conventionally known planetary gear reducer shown in FIGS. 2 to 4, and therefore the explanation thereof will be omitted.

According to the present invention configured as described above, the following advantages arise in terms of assembly and processing.

That is, the crank pin 44 is inserted through the curved plate 42422, the connecting member 55 is provided to penetrate the curved plate 42422,
The curved plate 42. Carriers 47, 48 are placed on both sides of 42°. Then, while supporting both ends of the crank pin 44 on the carrier 47.48, a knock pin (not shown) is inserted into the knock pin hole 61 of the carrier 47.48 and the knock pin penetration hole 57 of the connecting member 58 to determine the overall position. After that, the connecting member 58 and the carrier 47.4
8 and are fixed with fixing bolts 62 and 63, respectively.

Furthermore, since the carriers 47 and 48 are disk-shaped,
Since both can be overlapped, two or more carriers can be combined and processed. Therefore, the holes 49 and 50 for supporting both ends of the crank pin 44 can be easily and precisely machined, and the screw hole 61 and the bolt hole 60 can also be machined easily and with high precision.

What has been described above is one embodiment of the present invention, and the present invention is not limited to the above embodiment.

For example, the above-mentioned configuration of the present invention can be applied to a Zunsei Nanshinmetsu J of the type shown in FIG. ! It can also be applied to generations.

Also, the number of bolt holes is not limited to one,
The present invention also includes forming two or more as necessary.

Furthermore, since the planetary gear speed reducer can also be used as a speed increaser if the input shaft and output shaft are reversed, the present invention also includes the planetary gear speed reducer.

(Effects of the Invention) Since the present invention has the above configuration, the following effects are achieved.

Since the carriers on both sides have an independent structure, after supporting the crank pin, both carriers can be connected and fixed with a fixing bolt using a connecting member.
Eliminates deterioration in accuracy when attaching the crank pin to the carrier.

Therefore, the eccentricity error caused by misalignment of the crank pin is reduced, and the crank pin does not fall (tilt), thereby eliminating the reduction in durability due to uneven contact.

Since there are no protruding parts on the carrier, it is possible to make both carriers disk-shaped, so holes for fixing bolts and holes for dowel pins can be machined at any time.
Since the carriers on both sides are connected by a connecting member separate from the carrier and a fixing bolt, the opening interval of both carriers can be accurately obtained. At least there is no loss in accuracy,
Moreover, it is no longer necessary to accurately determine the surface angle of the end face of the connecting member. Therefore, there is no reduction in durability due to uneven contact or eccentricity errors caused by these manufacturing errors.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, FIG. 2 is a front view showing an example of a known planetary gear reducer, FIG. 3 is a cross-sectional view taken along line A-A in FIG. 1, and FIG. BB sectional view in Figure 3, No. 5
The figure is a sectional view showing another known planetary gear reducer. 4 is the input shaft, 41. ．． 41. : Eccentric part, 2, . 42
．． : Curved plate 43: Roller, 4: Crank pin, 44. ．． 44°: Eccentric part, 5
: Needle bearing, 46 Two pongee receivers, 7.48: Carrier, 49, 50: Support hole, 1: External teeth, 52
: times (casing, 3: internal teeth, 54: opening,
55: Connecting member, 6: Bolt screwing hole, 7 Bin through hole, 58: Stepped portion, 9: Recessed portion,
60: Hole for bolt, 1: Hole for pin, 2.63: Fixing bolt. Sub-Agent Patent Attorney Tsuji Part 2 Cause Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] One or more curved plates having meshing teeth, two carriers disposed on both sides of the curved plate and both fixed by a member passing through the curved plate, In a planetary gear speed reducer comprising one or more crank pins that are supported by a carrier and swing the curved plate by an eccentric portion that eccentrically contacts the curved plate, and a rotating body having teeth that mesh with the curved plate. , the two carriers are formed into a disc shape with substantially flat surfaces facing each other, a connecting member is provided that penetrates the curved plate and abuts on the both carriers, and the connecting member has one or more bolt holes. and a dowel pin through hole, a through hole is formed in both carriers that matches the bolt screw hole and the knock pin through hole of the connecting member, and a fixing bolt is screwed into the bolt screw hole from the outside of both carriers. A planetary gear speed reducer characterized in that both carriers are fixed by being inserted.