JP2003097650A - Series of hypoid gear reduction units with electric motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a series of hypoid gear reduction units with an electric motor, which can cope with a demand for reduction units from a low reduction ratio to a high reduction ratio at a low cost while suppressing increase of kinds of parts as small as possible. SOLUTION: This series is designed such that any one of three A, B, C type reduction units 2A, 2B, 2C, which have hypoid gears 22A, 22B, 22C and output shafts 23A, 23B, 23C, respectively, and different numbers of reduction stages, can be selectively coupled to one electric motor 1 having a motor shaft 12 with a hypoid pinion 11 directly cut thereon and a motor cover 15 supporting the motor shaft 12 via bearings 17. Although the respective type reduction units 2A, 2B, 2C each have respective different gear boxes 21A, 21B, 21C optimally designed according to the number of reduction stages thereof, any types can be directly coupled to the same electric motor 1 under the same condition using the common adaptor portion of the respective gear boxes 21A, 21B, 21C to the motor cover 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a series of hypoid speed reducers with a motor, which are most suitable for applications such as physical distribution equipment, especially for conveyors.

[0002]

2. Description of the Related Art As a series of a hypoid speed reducer with a motor of this type, one disclosed in Japanese Patent Publication No. 2866247 is known.

In this series, a common gear box capable of incorporating three reduction stages is used, and by incorporating two or three reduction stages in the gear box, it is possible to cover a wide range of reduction ratios. By using a hypoid gear set for one of the reduction stages and using a parallel shaft gear set for the remaining one or two reduction stages, the input shaft and the output shaft are orthogonal to each other.

In this series, when the three-stage type is used, the three speed reduction stages of "first stage + intermediate stage + final stage" are constituted by each gear set, and when the two-stage type is adopted, the intermediate stage is omitted. Thus, two reduction stages, "first stage + final stage", are configured with each gear set.

When the two-stage type is used, the intermediate stage is omitted
This is because the first stage is essential for input and the last stage is essential for output. In addition, since the first and last gears are indispensable because a common three-stage gearbox is used, even if the desired reduction ratio can be achieved with only one hypoid gear set in this series. It is necessary to provide at least two reduction stages.

[0006]

By the way, in recent years, along with the trend of increasing the speed of physical distribution equipment, there has been an increasing demand for a hypoid speed reducer with a motor having a reduced speed ratio. In this respect, when trying to cope with the reduction speed ratio in the above series, even if the reduction ratio that can be realized only by the hypoid gear set is at least 2
Inevitably, a reduction stage having a number of stages is incorporated, so that the number of parts increases and the cost increases, and the size increases due to the use of the three-stage gear box.

Therefore, what can be covered by one reduction stage is configured as a one-stage type having only a hypoid gear set,
Those that can be covered by two reduction stages are configured as a two-stage type of hypoid gear set + parallel shaft gear set, and those that need three or more reduction stages are hypoid gear set + parallel shaft gear set + parallel shaft gear set +・ ・ 3
The basic idea of constructing as a dan or higher type came out again. In other words, as the demand for reduced speed ratio increases,
As the advantages of using a common three-stage gearbox as described above have disappeared, there is no choice but to review the configuration of the series.

However, only one-stage type, two-stage type,
Even if a gearbox is individually prepared as a three-stage type and a combination with a motor is made into a series, the number of parts will be excessively increased and the rationality as a whole may be lost. Also, when using a hypoid gear set, the hypoid pinion is often cut directly on the motor shaft, but if you prepare a motor shaft with a hypoid pinion for each motor individually, the number of parts will increase and the cost will increase significantly. May invite.

In consideration of the above circumstances, the present invention is a hypoid with a motor having a rational structure that can meet the demands from the reduction speed ratio to the high reduction ratio at a low cost while suppressing the increase in the number of parts as much as possible. The purpose is to provide a series of reduction gears.

[0010]

According to a first aspect of the present invention, there is provided a hypoid pinion for a motor having a motor shaft in which a hypoid pinion is directly cut and a motor cover which supports the motor shaft through a bearing. It has a hypoid gear that meshes with it, and an output shaft that is arranged so as to be orthogonal to the motor shaft and that outputs the rotational power that is input to the hypoid gear to the outside, and that the number of deceleration stages is different from each other and that the number of deceleration stages is different. A series of motor-equipped hypoid speed reducers that constitute one motor-operated hypoid speed reducer by selecting and combining one type speed reducer from a plurality of speed reducers having different gear boxes. The gearbox of each type of reduction gear is directly connectable to and separable from the motor cover. It is obtained by solving the above problems.

In this series, it is possible to select an optimum type reduction gear having the number of reduction stages corresponding to the required reduction ratio. Moreover, since a gearbox of the optimum design can be prepared for each selected reduction gear type (number of reduction gears), it is possible to provide a lightweight, compact, and low-cost hypoid reduction gear with a motor.

In addition, any type of reduction gear selected is
Can be directly coupled to two motors under the same conditions. Further, since the motor is provided with the motor cover that can be separated from the gear box, the motor can be handled independently, the inventory can be stabilized, and the rotation test can be performed by itself.

Here, as the motor, it is desirable to prepare a plurality of types of motor shaft with an expensive hypoid pinion and a motor cover with a bearing for supporting the motor shaft as a common component, which increases the number of components. By suppressing the cost of the entire series, the choice of motors can be expanded.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing each element of the hypoid speed reducer series with motor of the embodiment in a plan sectional view.
FIG. 2 is a configuration diagram showing each element of the series in a front view or a side sectional view.

In this series, for the same motor 1,
A plurality of types of reduction gears 2A, 2B, and 2C having different sizes and different reduction stages can be combined in any combination.

The motor 1 has a motor shaft 12 having a hypoid pinion 11 directly cut at its tip. A motor casing 13 which is an outer shell of the motor 1 has a cylindrical motor frame 14 and a front opening thereof. Front motor cover 1
5 and a rear motor cover 16 that closes the rear opening. The motor shaft 12 is rotatably supported by a front bearing 17 fitted in the front motor cover 15 and a rear bearing 18 fitted in the rear motor cover 16. A two-stage seal 19 is provided on the front side of the front bearing 17 fitted to the front motor cover 15, and the reduction gear 2A,
The lubricating oil is prevented from entering the motor 1 side from the 2B and 2C sides.

As the speed reducer, three types of speed reducers 2A, 2B and 2C of A, B and C having different speed reduction stages are prepared.

The A type speed reducer 2A is a one-stage type having one speed reduction stage, and the B type speed reducer 2B has two speed reduction stages.
The two-stage C-type speed reducer 2C is a three-stage type having three speed reduction stages.
B and 2C are gear boxes 21A and 21A each having a different size and shape, which are optimally designed according to the number of reduction stages.
It has B and 21C. In addition, which speed reducer 2
A, 2B, and 2C are also hypoid gears 22A and 22 that mesh with the hypoid pinion 11 that is directly cut on the motor shaft 12.
B and 22C.

Which type (number of reduction stages) of reduction gear 2A,
Whether to select 2B or 2C is decided according to the size of the required reduction ratio. A type is prepared for reduction speed ratio, B is for medium reduction ratio, and C is for high reduction ratio. Has been done. Further, in response to the increase in the transmission torque capacity to the counterpart machine in this order, the gear boxes 21A, 21B, 21
For each C, output shafts 23A, 23B, 23C made of hollow shafts of different sizes (diameter, length, etc.) are attached. Here, the hollow shaft is used so that it can be connected to the mating machine (driven shaft) from either the left or the right.

These output shafts 23A, 23B and 23C are
The gearboxes 21A, 21B, 21C are arranged in a relationship orthogonal to the motor shaft 12, and are provided with two bearings 24A, 24B, 24C, 25A, 25B, 25C that are adapted to the sizes of the output shafts 23A, 23B, 23C, respectively. It is rotatably supported by.

Explaining each type, the A-type one-stage speed reducer 2A constitutes a reduction stage with only one hypoid gear set. The hypoid gear 22A is directly attached to the output shaft 23A, and the hypoid gear 22A is provided. The rotational power input to is directly transmitted to the output shaft 23A.

Also, a B type two-stage speed reducer 2B
Is a hypoid gear set that constitutes the first reduction stage,
The parallel shaft gear set constitutes the second reduction stage, and the intermediate shaft 26 parallel to the output shaft 23B is provided in the gear box 21B, and the hypoid gear 22B is attached thereto, and the intermediate shaft 26 and the output shaft 22B are connected to each other. Spur gear 2 meshing with each other
7 and 28 are mounted respectively, whereby the rotational power input to the hypoid gear 22B is transmitted to the output shaft 23B through the route of the intermediate shaft 26 → the spur gear 27 → the spur gear 28 → the output shaft 23B.

A C-type three-stage speed reducer 2C
Is a hypoid gear set that constitutes the first reduction stage,
The first and second parallel shaft gear sets constitute the second and third speed reduction stages, and the first and second parallel shaft gear sets are parallel to the output shaft 23C.
The second intermediate shafts 31 and 32 are provided in the gear box 21C to
The hypoid gear 22C is attached to the intermediate shaft 31 and the spur gears 33 and 34 that mesh with each other are attached to the first intermediate shaft 31 and the second intermediate shaft 32, respectively.
The second intermediate shaft 32 and the output shaft 23C are respectively fitted with spur gears 35 and 36 which mesh with each other, whereby the rotational power input to the hypoid gear 22C is transferred to the first intermediate shaft 31 → spur gear 33 → spur gear 34 → Second intermediate shaft 32 → spur gear 35 → spur gear 36 → output shaft 2
It is adapted to be transmitted to the output shaft 23C through a path of 3C.

The speed reducers 2A, 2 thus constructed
B, 2C and the motor 1, the front motor cover 15 is a side flange (connecting portion) of the gear boxes 21A, 21B, 21C.
The motor covers 15 are firmly integrated with each other by connecting the motor covers 15 with the bolts 41 in the state that they are fitted to the spigots 30A, 30B, and 30C.

In order to make it possible, the gear boxes 21A, 21B, 21C of the reduction gears 2A, 2B, 2C of each type are provided.
The side flanges 30A, 30B, 30C have a common connection with the front motor cover 15 of the motor 1, and are directly connectable and separable. That is, the gear boxes 21A, 21 of the reduction gears 2A, 2B, 2C that are coupled to the fitting portion 15M on the motor cover 15 side.
The side flanges 30A, 30B and 30C on the B and 21C sides have a structure common to all types.

The common side flanges 30A, 30B, 30C are, for example, (1) the flange size on the motor side is constant (2) the structure of the spigot on the motor side is constant (3) bolt mounting to the motor cover The position, number and size of the holes are constant (4) This means that the position of the knock pin for connecting with the motor cover is constant. It is not always necessary that all are constant, and even if only some are constant, it does not matter if it does not hinder the actual connection.

By thus configuring the series, the optimum type speed reducers 2A, 2B and 2C having the number of speed reduction stages corresponding to the required reduction ratio are combined with the motor 1 to manufacture a hypoid speed reducer with a motor. be able to.
In that case, the reduction gears 2A, 2B, and 2C of each type are gearboxes 21A, 21B, and 21C of the optimal design according to the number of reduction stages.
Therefore, it is possible to provide a lightweight, compact, low-cost hypoid speed reducer with a motor.

Which type of gear box 21A, 21
Since B and 21C share the same connection with the motor cover 15, which type of reduction gear 2A,
2B and 2C can also be directly coupled to one and the same motor 1 under the same conditions.

Further, the motor 1 is provided with gear boxes 2A, 2
Since the motor cover 15 that can be separated from B and 2C is provided from the beginning, only the motor 1 can be handled independently, the inventory can be stabilized, and the rotation test can be performed by itself.

Although only one type of motor 1 is shown in the illustrated example, a motor shaft 12 with a hypoid pinion, which requires a special processing machine and is expensive in terms of cost, and a front bearing 17 for supporting the motor shaft 12 are provided. By preparing a plurality of types of motors with the attached motor cover 15 as a common component, it is possible to widen the variation in providing a hypoid speed reducer with a motor at low cost.

As the type of motor, for example, those having different capacities, those having no inverter, those having no brake, etc. can be prepared.

The "series" in this embodiment
Does not necessarily mean the entire actual product system.
Specifically, the series as described above, for each frame number,
Alternatively, it is adopted in a part of each frame number, and the entire actual product system is constructed as a set of these.

Further, the individual speed reducers or the hypoid speed reducers with motors that compose the "series" here do not necessarily have to be prepared in stock as a finished product in advance, but an order from a user is required. In accordance with the above, a mode for manufacturing or completing the corresponding speed reducer or a hypoid speed reducer with a motor is included.

[0035]

As described above, according to the present invention,
Since it is possible to select an optimal type reduction gear having the number of reduction stages corresponding to the required reduction ratio and combine it with a motor, it is possible to provide a user with a hypoid reduction gear with a motor that is lightweight, compact and low in cost.

At this time, although the gear box is different for each type (speed reducer having a different number of speed reduction stages), the connection to the motor is common, and the motor side has the same motor cover and motor shaft. Type reduction gears can also be directly coupled to one motor under the same conditions.

Therefore, it is possible to maintain the rationality of the entire series while suppressing an increase in the kinds of parts without using extra parts.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing each element of a hypoid speed reducer series with a motor of an embodiment of the present invention in a plan sectional view.

FIG. 2 is a configuration diagram showing each element of the same series in a front view or a side sectional view.

[Explanation of symbols]

1 ... Motor 11 ... Hypoid pinion 12 ... Motor shaft 15 ... Front motor cover 17 ... Front bearing 2A, 2B, 2C ... Reduction gear 21A, 21B, 21C ... Gearbox 22A, 22B, 22C ... Hypoid gear 23A, 23B, 23C ... Output shaft 26, 31, 32 ... Intermediate shaft 27, 28, 33, 34, 35, 36 ... Spur gear 30A, 30B, 30C ... Side flange

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masanori Egawa             6-1, Asahi-cho, Obu-shi, Aichi Sumitomo             Machine Industry Co., Ltd.Nagoya Works (72) Inventor Takao Shigemi             6-1, Asahi-cho, Obu-shi, Aichi Sumitomo             Machine Industry Co., Ltd.Nagoya Works F term (reference) 3J009 DA18 EA06 EA16 EA25 EA31                       EB24 EC10 FA14                 3J063 AA33 AB04 AC01 BB48 CA01                       CD44                 5H605 AA05 BB05 CC02 CC03 CC10                       EA15 EA16 EA19 GG04 GG06                       GG14 GG16                 5H607 AA04 AA12 BB01 CC03 CC09                       DD07 DD09 DD19 EE31 EE36                       JJ05 JJ06

Claims (2)

[Claims] 1. A hypoid gear that meshes with the hypoid pinion, and a motor that has a motor shaft that directly cuts the hypoid pinion and a motor cover that supports the motor shaft through a bearing, and is orthogonal to the motor shaft. A plurality of types of reduction gears each having an output shaft for outputting the rotational power input to the hypoid gear to the outside, and different gearboxes having different reduction gears and different gearboxes corresponding to the difference in the reduction gears. It is a series of motor-equipped hypoid reduction gears that form one motor-equipped hypoid reduction gear by selecting and coupling one type of reduction gears from among A hypoid speed reducer with a motor, which can be directly connected to and separated from the motor cover. Of the series. 2. The hypoid speed reducer with a motor according to claim 1, wherein the motor includes a plurality of types of motor shaft with the hypoid pinion and a motor cover with a bearing for supporting the motor shaft as common parts. A series of devices.