JP2000035106A - Crossed gear reducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crossed gear reducer capable of being mounted on a mating machine in a compact manner. SOLUTION: A gear case of a crossed gear reducer 102 is divided into a front stage gear case (a first gear case) 152 for accommodating a front stage bearing (a first bearing) 116 supporting an intermediate shaft 118 so that it can freely rotate, and a rear stage gear case (a second gear case) 154 for accommodating a rear stage bearing (a second bearing) 124 supporting an output shaft 126 so that it can be freely rotated, and an external stepped part D is formed so that the dimensions G2 in the axial direction of the output shaft 126 of the rear stage gear case 154 may be shorter then the dimensions G1 of the front stage gear case 152 by the dimensions G3. In this case, mounting bolt holes 160a to 160d for mounting the crossed gear reducer 102 on a mating machine MM are preferably formed-arranged only on the side of the rear stage gear case 154.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is lightweight, compact and suitable for use in distribution equipment and the like, in particular, geared motors for chain conveyors.
The present invention relates to an orthogonal gear reducer that can be mounted variously on a mating machine (or a mating member) and can be made compact as a whole when mounted.

[0002]

2. Description of the Related Art In recent years, the needs of orthogonal gear reducers used with motors have been increasing in markets such as distribution equipment, especially chain conveyors.

[0003] The reason why the "orthogonal type" gear reducer is used is as follows. That is, this type of speed reducer is usually used in connection with a motor. The maximum dimension (longitudinal dimension) of a motor is generally in the axial direction of the motor. Therefore, in order to improve the space when the gear reducer is mounted on a mating machine such as a chain conveyor, the direction of the maximum dimension (the axial direction of the motor = the direction of the input shaft of the reducer) is It is best to arrange them so as to be parallel to the transport direction. However, in order to drive the axis of the chain conveyor (perpendicular to the transport direction), the output shaft of the gear reducer must be parallel to the axis of the chain conveyor. This is the reason why an orthogonal gear reducer is required.

By the way, this type of orthogonal gear reducer or an orthogonal geared motor in which this is combined with a motor constitutes only a part of a partner machine (a chain conveyor or the like). Furthermore, this partner machine also constitutes only a part of the entire distribution system. Therefore, in relation to the entire physical distribution system, there are often various members around the counterpart machine on which the gear reducer or the geared motor is to be mounted, which hinders the mounting. Also, if you have already completed the installation and are using
In some cases, it may not be possible to attach the device as it is because of a device to be newly added in the vicinity of the device.

Therefore, in such a quadrature gear reducer or a geared motor combining the same with a motor, it is possible to reduce the outer dimensions of the quadrature gear reducer after it is mounted on a mating machine. It is very strictly required to be able to reduce the size in a given direction.

Therefore, as a specific countermeasure,
Japanese Patent Publication No. 53656 discloses a method of preparing a series in which two types of mounting flanges are incorporated in the same orthogonal gear reducer, and has already been patented. According to this technique, the gear reducer can be mounted by rotating it by 180 °, or the gear reducer whose output shaft is in the opposite direction can be appropriately selected and used on the user side.

Further, Japanese Patent Application Laid-Open No. 6-54483 (Patent 2)
No. 522189) proposes a technique in which a predetermined surface of a gear box is prevented from protruding from an output shaft as much as possible while ensuring a variety of incorporation into a mating machine.

FIG. 9 and FIG.
1 shows a quadrature gear reducer (a geared motor using a quadrature gear reducer) disclosed in US Pat. 10A is a plan view, FIG. 10B is a front view, FIG. 10C is a front sectional view, and FIG. 9 is a developed plan sectional view.

The orthogonal gear reducer 2 includes an input shaft 8 integrated with a motor shaft (6) of a motor 4, and a hypoid formed integrally with the input shaft 8 at a tip 10 of the input shaft 8. A pinion (first gear) 12, a hypoid gear (second gear) 14 meshing with the hypoid pinion 12,
The hypoid gear 14 is incorporated and is formed integrally with the intermediate shaft 18 so as to be rotatable at right angles to the input shaft 8 via a pre-stage bearing (first bearing) 16. A small gear (third gear) 20;
A large gear (fourth gear) 22 meshing with the large gear 22
And an output shaft 26 rotatably supported in parallel with the intermediate shaft 18 via a rear-stage bearing (second bearing) 24.
And. The output shaft 26 is formed with a through hole 28 for connecting to the counterpart machine MM (so-called hollow shaft type).

A gear box 30 accommodating the speed reduction mechanism
Are substantially hexahedral, and the length G0 of the output shaft 26 in the axial direction X is set to a length (size) substantially equal to the outer shape M0 of the motor 4 in the same direction X.

As is apparent from FIG. 10, the output shaft 2
The center O1 of the gear box 30 is disposed at a position eccentric from the center O2 of the motor 4 by e1.
Is located at a position eccentric by e2. Therefore, when the output shaft 26 is attached to the counterpart machine MM through the through hole 28, the overhang lengths S1, S2 from the output shaft 26 are provided.
(Compared to the case where the center O1 of the output shaft 26 is arranged so as to coincide with the center O3 of the gear box 30).

[0012]

However, although the conventional various orthogonal gear reducers as described above can certainly contribute to the versatility of mounting and downsizing in some aspects, they do not always meet the needs of the user. It was not enough to cope with the situation, and there were still points to be improved.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide an orthogonal gear reducer capable of realizing compactness particularly in the axial dimension of an output shaft. That is the subject.

[0014]

According to the present invention, there is provided an input shaft, a first gear formed at a distal end of the input shaft, a second gear meshing with the first gear, and a second gear. And an intermediate shaft that is rotatably disposed orthogonal to the input shaft via a first bearing, a third gear incorporated in the intermediate shaft, and a third gear. An orthogonal gear reducer comprising: a fourth gear that meshes; and an output shaft in which the fourth gear is incorporated and that is rotatably disposed in parallel with the intermediate shaft via a second bearing. A first gear box housing a first bearing rotatably supporting the intermediate shaft; and a second gear box housing a second bearing rotatably supporting the output shaft, The outer shape of the output shaft of the second gear box is smaller than the axial size of the output shaft of the first gear box. By the step of is provided,
The present invention has solved the above problem.

According to the present invention, there is provided such a "orthogonal gear reducer of this type having a function of making the input shafts orthogonal to each other, and having an intermediate shaft around which it is necessary to incorporate a rear-stage small gear (third gear). It is difficult to shorten this in the axial direction of the output shaft, but it is possible to shorten this in the axial direction about the output shaft in the later stage. Caught by the concept of two gearboxes. In other words, a gear box of a substantially hexahedral orthogonal gear reducer, which was conventionally simply regarded as a “single object”, is replaced with a first gear box that houses a first bearing that rotatably supports an intermediate shaft; The output shaft of the second gear box is separated into a second gear box that houses a second bearing that rotatably supports the output shaft, and the axial length of the output shaft of the second gear box is the output shaft of the first gear box. Are formed so as to be shorter than the length in the axial direction.

Thus, in the orthogonal gear reducer according to the present invention, the axial length of the output shaft can be reduced by at least the step difference from the first gear box in at least the second gear box. , As described below,
Compared with the related art, the compactness after the orthogonal gear reducer is mounted on the mating machine can be improved.

In the present invention, the first gear box and the second gear box do not necessarily require that the accommodating spaces of the respective speed reduction mechanisms be completely separated from each other. And a portion (a second gear box) that accommodates a first bearing for the output shaft and a portion (a second gear box) that accommodates a second bearing for the output shaft. It is only necessary that a "step" be formed, and the gear box itself may be formed integrally.

In a preferred embodiment, mounting bolt holes for mounting the orthogonal gear reducer to a mating machine are arranged in the second gear box.

Thus, the advantage of the presence of the "step" can be maximized when the orthogonal gear reducer is mounted on the mating machine, and no problem occurs during the installation even if the "step" exists. You can do so.

[0020] In a preferred embodiment, the mounting bolt holes of the second gear box are arranged in parallel with the output shaft and at the same distance from the center of the output shaft. .

As a specific example, a configuration is conceivable in which the mounting bolt holes are arranged at the vertices of a square or a rectangle with the output shaft as the center (claim 4).

When the mounting bolt holes are arranged at the apexes of the rectangle, two types of mounting are possible in which the mounting direction of the orthogonal gear reducer is rotated by 180 °. When the mounting bolt holes are arranged at the apexes of a square, four types of mounting are possible, in which the mounting direction of the orthogonal gear reducer is rotated by 90 °.

In a preferred embodiment, the mounting bolt holes of the second gear box are arranged at equal intervals with respect to the center of the output shaft.

As a specific example, a configuration in which the mounting bolt holes are arranged at the apexes of a regular triangle, a square, a regular pentagon, a regular hexagon,. With these arrangements, it is possible to mount n different ways by rotating the orthogonal gear reducer by n / 360 °.

In a preferred embodiment, the output shaft is a hollow shaft type, and the mounting bolt holes of the second gear box are formed as through holes passing through the second gear box in parallel with the output shaft. (Claim 6). As a result, it is possible to freely select whether to mount the orthogonal gear reducer upside down, that is, to mount with the stepped side or the non-stepped side facing the counterpart machine.

Further, in a preferred embodiment, the center of the output shaft is displaced from the center of each mounting bolt hole (claim 7).

This makes it possible to reduce the overhang distance of the gear box in a specific direction with respect to the output shaft.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the orthogonal gear reducer according to the present invention.

The orthogonal gear reducer 102 according to this embodiment
Are integrated with the motor 104 and are used as components of a so-called geared motor GM.

The motor shaft 106 of the motor 104 is
07 is connected to the input shaft 108 of the orthogonal gear reducer 102. A hypoid pinion (first gear) 112 is provided at the tip 110 of the input shaft 108.
It is formed integrally (directly). The hypoid pinion 112 has a hypoid gear (second gear) 114.
Is engaged. The hypoid gear 114 has an intermediate shaft 118
Built in. The intermediate shaft 118 is rotatably arranged in a state orthogonal to the input shaft 108 via a front-stage bearing (first bearing) 116, and is provided with a small gear (third gear) 1.
20 are incorporated. The small gear 120 is a large gear 122
, And the large gear 122 is incorporated in the output shaft 126. The output shaft 126 is a rear-stage bearing (second bearing) 1
24, it is arranged in parallel with the intermediate shaft 118 and rotatably.

The gear box 150 of the orthogonal gear reducer 102
Are a front gear box (first gear box) 152 and a rear gear box (second gear box) 1 integrally formed with the front gear box 152.
54. The front gear box 152 is a front bearing (first bearing) 116 that rotatably supports the intermediate shaft 118.
And the input shaft 108 and the hypoid pinion 11
2. Covers and protects the elements at the stage before the reduction mechanism up to the hypoid gear 114 and the small gear 120. On the other hand, the rear gear box 154 houses the rear bearing (second bearing) 124 that rotatably supports the output shaft 126, and mainly covers elements on the rear side of the reduction mechanism including the large gear 122 and the output shaft 126.・ Protected.

As apparent from FIGS. 1 and 2A, the dimension G2 of the output shaft 126 of the rear gear box 154 in the axial direction X is G3 larger than the dimension G1 of the front gear box 152 in the same direction X. It is set short, and a “step D” is formed on the outer shape.

On the other hand, this geared motor GM is
M for attachment to the mounting bolt hole 160 (160a-
160d) is arranged only on the side of the rear gear box 154. This is to make the most of the advantage of the "step" when mounting to the counterpart machine MM,
In addition, this is to prevent a problem from occurring due to the presence of the "step".

More specifically, in this embodiment, four mounting bolt holes 160 are provided on the rear gear box 154 side at four apexes of a square centered on the output shaft 126 in parallel with the output shaft 126. Are located.

Each mounting bolt hole 160 is provided in the output shaft 1.
A so-called hollow shaft type output shaft in which the output shaft 126 itself is formed as a “through hole” penetrating through the rear gear box 154 in parallel with 26, and the output shaft 126 itself is formed with a through hole 128 for coupling with the mating machine MM. Have been.

Next, the geared motor G according to this embodiment
The operation of M will be described.

The rotation of the motor shaft 106 is transmitted to the input shaft 108 of the orthogonal gear reducer 102 via the key 107,
The power is transmitted to a hypoid gear 114 meshing with the hypoid pinion 112 via a hypoid pinion 112 formed at the tip 110 of the input shaft 108. Here, the rotating shaft is bent by 90 °, the shaft center is offset by e1, and the first-stage deceleration is executed at a considerably large reduction ratio. The rotation of the hypoid gear 114 is transmitted to the small gear 120 via the intermediate shaft 118, and further transmitted to the output shaft 12 via the large gear 122 meshing with the small gear 120.
6 is transmitted. Therefore, the second-stage deceleration is performed. After all, the rotation of the motor shaft 106 is greatly reduced by the two-stage reduction mechanism, and is taken out from the output shaft 126.

Here, in this orthogonal gear reducer 102, the mounting bolt hole 160 for the mating machine MM is formed in the rear gear box 154 only in the form of a "through hole", and the output shaft 126 is hollow. Since it is a shaft type, it can be attached to the mating machine MM in the manner shown in FIG. 3 (A) or (B). FIG. 3A shows a state in which the side where the step D exists is directed toward the mating machine MM and the driven shaft S
FIG. 3 (B) is a view in which the side where the step D does not exist faces toward the mating machine MM.

Also, in this orthogonal gear reducer 102, since four mounting bolt holes 160a to 160d are formed at the apexes of a square with the output shaft 126 as the center, FIGS. B) on each side of FIG.
(A) to (D), it is possible to attach to the partner machine MM in four ways, and finally, it is possible to attach in a total of eight ways. As a result, for example, FIG.
As shown in FIG. 5, when the partner machine MM is driven from the output shaft 126 via the belt BL, the step D
Can accommodate the belt BL.

Further, as shown in FIG. 6, two geared motors GM according to the present embodiment are arranged in parallel back-to-back, and one non-drive shaft S (the counterpart machine MM) is driven with twice the torque. In this case, the hatched portion H2 can be used as a free space around the geared motor GM.

Next, another embodiment of the present invention will be described.

FIG. 7 schematically shows another example of the arrangement of the mounting positions of the mounting bolt holes 170 and 180 with respect to the mating machine MM. In FIG. 7A, a total of six mounting bolt holes 170 (170a to 170f) are arranged at the same distance R1 from the center O3 of the output shaft 126 and at intervals of 60 ° with respect to the center O3 of the output shaft 126. are doing.
FIG. 7B shows the mounting bolt hole 180 (180a).
To 180 h) at a 45 ° interval R1.

Mounting bolt hole 170 (or 180)
Is formed in the rear gear box 154 in such a position, in the case of the example of FIG.
In the case of (B), eight types of attachments, each of which is rotated by 45 °, are possible.

Also, here, each mounting bolt hole 170 (18
In the case of FIG. 7 (A) and FIG. 7 (B), in the case of FIG. 7 (A) and FIG. You can also freely choose to point to.

In the above embodiment, the mounting bolt holes are all through holes, but in the present invention, the mounting bolt holes need not necessarily be through holes. For example, as shown in FIGS. 8A and 8B, various modes can be adopted in forming the mounting bolt holes. In FIG. 8A, two flanges 190 are formed so as to protrude to form a through hole 192 that penetrates the flange 190, so that a function substantially similar to that of penetrating a gear box is provided. I have. On the other hand, although (B) is not penetrated, by forming the threaded mounting bolt holes 200, the mating machine MM can be viewed from either side.
It can be connected to.

Further, in the above embodiment, the output shaft is arranged at the center of the mounting bolt hole to ensure the variety of mounting by rotation. However, the present invention is not limited to this. As described with reference to FIG. 9 and FIG. 10, the output shaft is deliberately removed from the center of the mounting bolt hole to reduce the overhang distance (S1, S2 in the example of FIG. 9) of the specific surface from the output shaft. It can also be configured.

[0048]

As described above, according to the present invention,
In a two-stage speed reducer in which the input shaft and the output shaft are orthogonal to each other, a part (second gear box) of the speed reducer in the output shaft direction can be shortened. It is possible to obtain an excellent effect that it is possible to further improve the mountability when mounting the machine and the compactness after mounting.

Also, the mounting bolt holes for the mating machine are
For example, by forming various forms only on the second gear box, the step between the first gear box and the second gear box can be changed in various directions and angles in relation to the counterpart machine. The effect that it becomes possible is also obtained.

[Brief description of the drawings]

FIG. 1 is an exploded plan sectional view of a motorized orthogonal gear reducer (geared motor) according to an embodiment of the present invention.

FIG. 2 is a plan view (A), front view (B), and plan sectional view (C) showing the geared motor.

FIG. 3 is a plan view showing an example of a mounting mode of the geared motor.

FIG. 4 is a front view showing an example of a mounting mode of the geared motor.

FIG. 5 is a plan view showing advantages in mounting the geared motor.

FIG. 6 is a plan view showing an example in which two geared motors are arranged side by side back to side and in parallel.

FIG. 7 is a front view schematically showing another example of the arrangement of the mounting positions of the mounting bolt holes.

FIG. 8 is a plan view showing another example of the mode of forming the mounting bolt holes.

9 is an exploded plan sectional view corresponding to FIG. 1 of a conventional orthogonal gear reducer with a motor (geared motor).

FIG. 10 is a plan view (A), a front view (B), and a plan sectional view (C) corresponding to FIG. 2 showing the conventional geared motor.

[Description of Signs] 2, 102: orthogonal gear reducer 4, 104: motor 6, 106: motor shaft 108: input shaft 10, 110: tip 12, 112: hypoid pinion: first gear 14, 114: hypoid gear : Second gear 18, 118 ... intermediate shaft 20, 120 ... small gear: third gear 22, 122 ... large gear 26, 126 ... output shaft 159 ... rear gear box: second gear box 152 ... front gear box ： First gear box D… Step

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J009 DA17 EA06 EA11 EA18 EA25 EA32 EA44 EB24 FA30 3J063 AA33 AB02 AB04 AC01 BA01 BA03 BB41 BB44 CA01 CB13 CB41 CD02 CD42 CD44 CD45 XA03

Claims (7)

[Claims] An input shaft, a first gear formed at a tip end of the input shaft, a second gear meshing with the first gear,
An intermediate shaft into which the second gear is incorporated, and which is rotatably arranged orthogonal to the input shaft via a first bearing; a third gear incorporated into the intermediate shaft; Orthogonal gear reduction comprising: a fourth gear meshing with the second gear; and an output shaft incorporating the fourth gear and rotatably disposed in parallel with the intermediate shaft via a second bearing. A first gear box housing a first bearing rotatably supporting the intermediate shaft; and a second gear box housing a second bearing rotatably supporting the output shaft. A step on the outer shape is provided so that the axial dimension of the output shaft of the second gear box is shorter than the axial dimension of the output shaft of the first gear box. And orthogonal gear reducer. 2. The orthogonal gear reducer according to claim 1, wherein mounting bolt holes for attaching the orthogonal gear reducer to a mating machine are arranged in the second gear box. 3. The orthogonal gear reduction according to claim 2, wherein the mounting bolt holes of the second gear box are arranged in parallel with the output shaft and at the same distance from the center of the output shaft. Machine. 4. The orthogonal gear reducer according to claim 2, wherein the mounting bolt holes of the second gear box are arranged at the vertices of a square centered on the output shaft. 5. The orthogonal gear reducer according to claim 2, wherein the mounting bolt holes of the second gear box are arranged at equal intervals with respect to the center of the output shaft. 6. The method according to claim 2, wherein the output shaft is a hollow shaft type, and the mounting bolt hole of the second gear box is a through hole passing through the second gear box in parallel with the output shaft. Characteristic orthogonal gear reducer. 7. The orthogonal gear reducer according to claim 2, wherein the center of the output shaft is displaced from the center of each mounting bolt hole.