JP2628983B2 - Cartesian gear with motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-weight, compact, and high-efficiency orthogonal gear device equipped with a motor, which can be mounted in various ways, and is most suitable for use in distribution equipment and the like, particularly for chain conveyors.

[0002]

2. Description of the Related Art In recent years, in markets such as distribution equipment, particularly chain conveyors, the need for a motor-equipped orthogonal gear device having a motor and an orthogonal motor shaft and output shaft has been increasing.

The reason why "with motor" is required is as follows. That is, for example, in a distribution system including a plurality of chain conveyors, it is efficient to operate only necessary parts only when necessary. in this case,
It is convenient if the drive of each chain conveyor is independent. It is also common to change the arrangement of each chain conveyor in order to change the transport system path. In this case, however, it is more convenient if the driving of each chain conveyor is independent.

On the other hand, the reason why the "orthogonal gear device" is required is as follows. That is, the maximum dimension (longitudinal dimension) of the gear device with a motor is the axial direction of the motor. Therefore, it is best to arrange the direction of the maximum dimension (the direction of the motor shaft) in parallel with the chain conveyor in order to improve the space when the gear device is mounted. However, in order to drive the shaft of the chain conveyor, the output shaft of the gear device must be parallel to the shaft of the chain conveyor. Therefore, the output shaft of the gear device needs to be orthogonal to the motor shaft.

[0005] By the way, the motor-equipped orthogonal gear device constitutes only a part of a mating machine (such as a chain conveyor). Furthermore, this partner machine also constitutes only a part of the entire distribution system. Therefore, in relation to the whole distribution system, there are often various members around the counterpart machine on which the gear device is to be mounted, which hinders the mounting. Further, the motor already mounted and in use may not be able to be mounted as it is because of a counterpart machine or the like to be newly added in the vicinity thereof.

In such a case, the gear device is connected to
It must be installed by rotating it by 0 °, or use a shaft with the opposite direction.

Conventionally, as a device for facilitating such a work, Japanese Patent Publication No. 2-53656 discloses a method of preparing two types of flanges in a series.

In Japanese Utility Model Laid-Open No. 22450/1990, a gear box directly connected to a motor is formed in a hexahedron, and mounting holes are provided on a surface of the gear box not directly connected to the motor. The disclosed technology is disclosed.

[0009]

However, the above-mentioned known methods as described above still have the following problems to be solved.

First, in the method disclosed in Japanese Patent Publication No. 2-53656, the mounting direction is changed in four directions (0 °, 90 °,
(180 °, 270 °), there is a problem that it is necessary to design and prepare gear devices of two types of product variations in advance. Further, when it is necessary to rotate a machine already in use in relation to the arrangement of another partner machine, there has been a problem that the machine cannot always be rotated without hindrance. That is, only two types of product variations are required to secure the mounting in four directions, and there is a problem that the position of the mounting bolt with respect to the output shaft is different by simply rotating the same object. .

The method of Japanese Utility Model Laid-Open No. 22450/1990 has the following problem.

FIG. 1 shows an example in which a motor-equipped orthogonal gear device according to an embodiment of the present invention, which will be described in detail later, is used as a partner machine (chain conveyor) in a distribution system. In a chain conveyor or the like, as shown in this example, the lengths Sa and Sb from the center Os of the output shaft 62 to the outer periphery of the gear box 64 are set to avoid interference with a conveyed object W flowing on the chain conveyor C. Bending radius Rc of chain conveyor C
Is required. Therefore, in this type of gear device, the center Os of the output shaft 62 is often shifted from the center Ob of the mounting bolt hole.

In this case, when the technique disclosed in Japanese Utility Model Laid-Open No. 22450/1990 is to be applied, the mounting bolt hole is inevitably located at the vertex position of a square arranged "coaxially" with the output shaft. Will be provided. For this reason, the mounting bolt holes must be arranged at a pitch relatively smaller than the size of the entire gear box. Therefore, the ability of the bolt to receive the reaction force of the torque of the drive shaft is small for the size of the gear box.

In the case of using a worm speed reducer as in the example of Japanese Utility Model Application Laid-Open No. 22450/1990, the efficiency of the worm speed reducer itself is low, and the transmission torque is small for its magnitude. Such a bolt arrangement is sufficient, but when a high-efficiency and high-torque reducer is required as in the application to a conveyor, it is necessary to secure a large fixing force by the bolt. For this reason, it is impossible to arrange the mounting bolt hole near the outer peripheral portion of the gear box.
The method of JP 50 is not practical.

[0015] In view of such a conventional problem, the applicant has
On the same day, we have provided a motorized orthogonal gear device that is optimal for driving logistics equipment, especially chain conveyors, etc., and that is lightweight, compact and can be mounted in various ways.

The content is that in a motor-equipped orthogonal gear device provided with a motor and a gear box having an output shaft orthogonal to the motor shaft, the output shaft of the gear box is a hollow hollow shaft type. The gear box is penetrated, and the mounting bolt holes of the gear box are arranged at four apexes of a square such that the position of the output shaft is diagonal and at the same time deviated from the center. The bolt hole is also formed by penetrating the gear box in parallel with the output shaft, and the two surfaces through which the output shaft and the mounting bolt hole are penetrated can be attached together.

In order to realize the present invention, the output shaft is necessarily a hollow hollow shaft type, and a gear mechanism for changing the rotation of the motor shaft to a right angle and offsetting the shaft center is employed. The need comes out.

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024] In addition, in the current industry, a straight-motorized
In交歯sheave system, (1) the total length is small, and it is light weight (2) chain conveyor or the like, instead of moving all the time, higher startup efficiency to move as and when required (3) Power Consumption (4) Low noise to maintain the working environment around the chain conveyor (5) To cope with various chain conveyor speeds, about 1 / 5-1 / 120 of about large reduction ratio of the there is a request for such can be easily produced by one of the gear box, but conventionally variety relates to a mounting as described above with such requirements
There is no motorized orthogonal gear device that can simultaneously solve the problems.

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

[0031] The present invention has been made such has been made in view of the conventional problems, material handling equipment, optimal for particular driving the chain conveyor or the like, light-weight, compact, preparative
It is an object of the present invention to provide a motor-equipped orthogonal gear device that is versatile, has low noise, and has high efficiency.

[0032]

According to the present invention, there is provided a motorized orthogonal gear device comprising a motor and a gear box having an output shaft arranged orthogonal to the motor. transmural the gearbox and a hollow hollow shaft type
Through, and the mounting bolt hole of the gear box is square or rectangular.
And the output shaft of the gear box is
Off the center of the square or rectangle and remove the gearbox
Line connecting the mounting bolt hole on the side away from the output shaft and this gear
Between the boxes of the output shaft, the motor shaft is arranged, a hypoid pinion provided on the motor shaft, the meshing of the hypoid gear mounted on the shaft which is perpendicular by shifting the motor shaft and the axis, The object has been achieved by realizing the orthogonality between the motor shaft and the output shaft.

[0033]

That is, in the present invention, for the sake of convenience, referring to FIG. 2, a hypoid pinion 54 is formed integrally with the motor shaft 52 of the motor 50, and the hypoid gear 56 is meshed with the hypoid pinion. The hypoid gear 56 is mounted on a shaft 57 which is perpendicular to the motor shaft 52 by shifting the shaft center by e1.

The rotation of the motor 50 is transmitted to an output shaft 62 via a motor shaft 52, a hypoid pinion 54, and a hypoid gear 56 (in the illustrated example, further via a second-stage pinion 58 and an output shaft gear 60). . Due to the engagement between the hypoid pinion 54 and the hypoid gear 56, the rotation of the motor shaft 52 is bent by 90 ° and the axis thereof is shifted by e1.

As described above, since the motor shaft 52 is shifted from the center of the output shaft 62 by e1, the shift e1 is used.
By doing so, the " the center Os of the output shaft 62
While reducing the size Sa to a specific surface 64a of incorporating it "can be easily performed without the motor 50 of larger radius Um than this be out Zhang than a certain surface 64a.

Further, by using the hypoid gear, the reduction ratio can be made larger than that using, for example, a bevel gear, so that the number of gear stages can be reduced for the same reduction ratio. Cost reduction and noise reduction can be realized.

Further, for example , for a device using a worm gear, both dynamic efficiency and static efficiency can be improved while maintaining the characteristic of low noise. That is, a smaller motor is sufficient for the same required torque. Conversely, a larger output torque can be obtained with a motor of the same size. As a result, it is possible to reduce the weight, the size, and the power consumption. Further, since all the gears can be high-hardness gears, they can be smaller than the worm gear for the same transmission torque.

In the present invention, in addition to the above-mentioned effects,
Since the output shaft center Os is shifted from the center Ob of the mounting bolt holes 65a to 65b arranged at the apex position of the square or the rectangle , two surfaces 64a and 64b of the four outer surfaces 64a to 64d of the gear box are used. With respect to (2), the amount of overhang of the output shaft 62 from the center Os can be reduced, and mounting with very good space can be performed when installing a chain conveyor or the like.

[0040] In other words, I before Symbol work for and cooperation with, while in this way reduce the distance to a particular surface 64a or 64b, in, large motor 5 so that it does not in any way interfere with this
0 or a gear box 64 can be incorporated. That is, the book
In the invention, the output shaft is a hollow hollow shaft type.
The center of the output shaft and the inside of the gear box
The amount of overhang from the output shaft 62 even if it is out of alignment
Output shaft against the gearbox without moving the small side of
So-called right-facing type is also left-facing.
Can be used as
In addition to the use, the variety of mounting in relation to the motor
It can be further improved.

[0041]

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

FIG. 1 is a front view showing an example in which an embodiment of the present invention is applied for driving a chain conveyor C, FIG. 2 is a partial front sectional view of a gear device according to the embodiment, and FIG. FIG. 4 is a developed sectional view showing the positional relationship of FIG.

1 to 3, reference numeral 50 denotes a motor;
Is a gear box, and 62 is an output shaft.

A hypoid pinion 54 is formed integrally with the motor shaft 52 of the motor 50. The hypoid pinion 54 meshes with a hypoid gear 56.

The shaft 57 of the hypoid gear 56 is orthogonal to the motor shaft 52 with its axis shifted by e1.
A second-stage pinion 58 is cut into this shaft 57 and meshes with an output shaft gear 60 integrated with the output shaft 62.

The output shaft 62 has a hollow hole 62a penetrating through the gear box 64, and is of a so-called hollow shaft type.

Mounting bolt holes 65a to 65d of gear box 64
Also penetrates through the gear box 64 in parallel with the output shaft 62.

In this embodiment, the outer peripheral surface 6 of the gear box 64
4a to 64d, output shaft 62, mounting bolts 65a to 65d
Are set as follows.

Sa = Sb, Sc = Sd, Sa + Sc = Sb + Sd Ta = Tb, Tc = Td, Ta + Tc = Tb + TdSa <Sc, Sb <SdTa <Tc, Tb <Td

That is, the mounting bolt holes 65a to 65d are arranged at the apexes of a square, and the output shaft 62 is arranged so as to be offset from the center thereof and to be located on a diagonal line of the square.

The output shaft 62 and the mounting bolt holes 65a to 65
The outer peripheral surfaces through which d passes are the installation surfaces 72a and 72b (mountable surfaces). The installation surfaces 72a and 72b are formed with flange portions 74a and 74b concentric with the output shaft 62 and protruding from the installation surfaces 72a and 72b.

The motor shaft 52 is supported by bearings 77 and 79 in the joint cover 70, the motor frame 73 and the cover 75.

The motor shaft 52 is connected to the center O of the output shaft 62.
The offset amount e1 is generated in parallel with a line connecting s and the center Oh of the hypoid gear 56, and on the outer peripheral surface 64c that is farther away by shifting the output shaft 62. The motor shaft 52 is arranged at an equal distance Xa from the two mounting surfaces 72a and 72b (FIG. 3).

As shown in FIG. 4 or FIG. 5, this hollow shaft type orthogonal gear device has a shaft 8 of a chain conveyor C.
0 is fitted in the hollow hole 62a of the output shaft 62, locked around by the key 85, and fixed to the chain conveyor C side by the torque arm 82, thereby being mounted on the chain conveyor C side (mounted on the shaft).

As can be seen from both figures, it can be mounted from any direction. In other words, the output shaft is
The right type or the left type
It can also be used as an indented type. Torque arm 82
Is fixed to the chain conveyor C side by some means (stop).
Otherwise, due to the load, the mating machine shaft 80 does not rotate and the entire gear device rotates around the mating machine shaft.

As shown in FIG. 6 or FIG.
4a, 74b, and mounting bolts 76a-76d, it is also possible to mount directly to the mounting surface 84 of the mating machine (flange mounting).

When mounting by this mounting method, it is necessary to center the shaft 80 of the chain conveyor C and the output shaft 62, but the mounting surfaces 72a and 72b have flange portions 7
Since the projections 4a and 74b are formed concentrically with the output shaft 62, they can be accurately centered by fitting them into the holes 84a of the mounting surface 84 of the mating machine.

As shown in FIG. 8, the gear device can be mounted by being rotated by 90 ° (in both axial mounting and flange mounting). In this case, the output shaft 6 is always selected by selecting the installation surfaces 72a and 72b.
The outer peripheral surfaces 64a and 64b having a short distance from the second conveyor 2 can face the conveying surface and the turning surface of the chain conveyor C.

As shown in FIG. 9, in this gear device, a tap hole 92 is formed in an outer peripheral surface 64c.
By utilizing this, mounting on the floor with the bolt 90 can be performed. Since the surface 64c remote from the output shaft 62 generally has a sufficient space, the thickness of the gear box 64 can be increased to form such a tapped hole 92. Also in this case, it is possible to mount the motor 50 in an arbitrary manner.

In this embodiment, the rotation of the motor shaft 52 is controlled by the hypoid gear 5 via the hypoid pinion 54.
6 where the rotation axis is bent 90 ° and the axis is offset by e1, and deceleration is performed at a rather large reduction ratio. The rotation of the hypoid gear 56 is 2
The speed is further reduced by the stage pinion 58 and the output shaft gear 60, and the output shaft 62 is rotated and taken out.

The output shaft 62 includes the shaft 8 of the chain conveyor C.
0 is fitted, and the entire gear device is supported by the torque arm 82 so as not to rotate (FIGS. 4 and 5), so that the rotation of the output shaft 62 causes the mating machine shaft 80 to rotate. Can be

In this case, the motor shaft 52 is positioned on the side of the surface 64c where the overhang from the center Os of the output shaft 62 is large.
Since it is incorporated by shifting by e1, a motor having a radius Um larger than Sa (a motor having a larger output) is mounted on the outer periphery while maintaining the amount of protrusion Sa of the gear box 64 from the center of the output shaft 62 small. It can be assembled without protruding from the surface 64a.

In this gear device, the mounting bolt holes 65a to 65d are formed in the outer peripheral surface 64a of the gear box 64 because of the structure.
Since it can be mounted at a large pitch in the vicinity of .about.64d, the mounting strength can be maintained higher than that of the actually-open flat type 2-22450. Forming the mounting bolt holes 65a to 65d in the vicinity of the outer peripheral surfaces 64a to 64d means that the gear box 64
This is also advantageous in that it is easier to form a "through hole" than when it is formed in the central part of the.

In the above embodiment, the hypoid pinion 54 can be cut directly into the motor shaft 52, unlike the bevel gear, so that the motor shaft 52 and the gear box 64
It is not necessary to use a coupling or the like for connection with the input shaft of the present invention, and the size can be reduced in the axial direction.

Further, by using the hypoid gear set, the dynamic efficiency and the efficiency can be improved as compared with those using the worm gear.
The static efficiency can be increased together, and a smaller motor is required for the same required torque, and a larger output torque can be obtained with a motor of the same size.

Further, since all the gears can be high hardness gears, the size can be made smaller than that using a worm gear for the same transmission torque.

On the other hand, the efficiency of the bevel gear is slightly lower, but the noise can be reduced, and the reduction ratio can be made much larger than that of the bevel gear. As a result, lightweight and compactness can be realized.

In this embodiment, the center Os of the output shaft 62 is shifted from the center Ob of the pitch of the mounting bolt holes 65a to 65d. , 64b for the output shaft 62
Can be reduced from the center Os, and the installation of the chain conveyor C and the like can be performed with very good space. In other words, if the overhang amounts Sa and Sb can be tolerated in the same manner as in the prior art, a larger motor or gear box can be assembled.

Also, the mounting bolt holes 65a to 65d can be mounted at a large pitch at a position almost at the outer peripheral surface of the gear box 64, and a sufficient fixing ability can be obtained even if the torque handled by the gear device is large.

Further, the output shaft is a hollow shaft, the pitch of the mounting bolt holes 65a to 65d is square, and is formed so as to penetrate the gear box, and the output shaft 62 is centered along the diagonal of the square. As a result, the mounting surface can be changed from 72a to 72b (FIG. 3), and the direction of the motor shaft 52 can be changed without any modification of the mating machine or the gear device.

In this case as well, the smaller overhang from the output shaft center Os can always correspond to the same position of the partner machine. Further, it can be mounted on any side of the side of the mating machine as well as rotating at the same position.

The flanges 74a, 74b concentric with the output shaft 62 are formed on the mountable surfaces 72a, 72b so as to protrude from the mountable surfaces 72a, 72b. Is used as an index at the time of positioning, the present gear device can be mounted by flange mounting in addition to so-called axial mounting.

Further, since the motor shaft 52 is disposed between the output shaft 62 and a line connecting the mounting bolt holes 65b and 65c on the side remote from the output shaft 62 of the gear box,
Even if the output shaft 62 is offset with respect to the center 0b of the gearbox, the motor 52 can still be connected at approximately the center of the gearbox, and from the output shaft 62 to a specific outer peripheral surface (especially 64a). It is possible to mount a large motor substantially equal to the size of the gear box while keeping the overhang amount small.

On the side of the surface 64c remote from the output shaft 62, in view of the general space allowance, the thickness of a part or all of the surface is increased to increase the thickness of the tapped hole 92c.
, So that it can also be mounted by floor mounting.

[0075]

As described above, according to the present invention, a lighter and more compact outer shape, a higher output torque,
In addition, an excellent effect that an efficient orthogonal gear device with a motor can be obtained is obtained.

Further, in the case of a gear device with a motor of a similar size, it is possible to minimize the amount of overhang of the surface not to be overhanged with respect to the output shaft. And an excellent effect that the space property at the time of assembling can be further improved can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing an example in which an embodiment of the present invention is applied to a chain conveyor.

FIG. 2 is a sectional view showing the inside of a gear box of the apparatus of the embodiment.

FIG. 3 is a developed cross-sectional view showing a positional relationship of a gear train.

FIG. 4 is a plan view showing an example in which the apparatus of the embodiment is mounted on a shaft of a counterpart machine;

FIG. 5 is a plan view showing another example of attachment to a mating machine.

FIG. 6 is a plan view showing another example of attachment to a mating machine.

FIG. 7 is a plan view showing another example of attachment to a mating machine.

FIG. 8 is a plan view showing another example of attachment to a mating machine.

FIG. 9 is a front view showing an example of attachment to a floor;

FIG. 10 is a front view showing an example of a conventional orthogonal gear device with a motor using a worm gear.

FIG. 11 is a view taken along line XI-XI in FIG. 10;

FIG. 12 is a cross-sectional view showing an example of a conventional orthogonal gear device (motor unit omitted) using a bevel gear.

[Explanation of symbols]

 10, 50 ... motor 12, 52 ... motor shaft 16 ... pinion shaft 18 ... worm pinion 20 ... worm wheel 22, 42, 62 ... output shaft 22a, 42a ... hollow hole 32 ... bevel pinion shaft 34, 36 ... bevel gear 38, 40 ... reduction gear 54 ... hypoid pinion 56 ... hypoid gear 64 ... gear box 64a to 64d ... outer peripheral surface of gear box 65a to 65d ... mounting bolt hole 72a to 72d ... installation surface (mountable surface) 74a, 74b ... flange portion 80 ... Counterpart machine shaft 82 Torque arm 84 Mounting bolt 86 Mounting surface of counterpart machine 92 Tapped hole

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Katsumi Taki 6-1, Asahi-cho, Obu-shi, Aichi Pref. Sumitomo Heavy Industries, Ltd. Nagoya Works (56) References JP-A-1-168568 JP-A-47-38649 (JP, A) JP-A-60-29426 (JP, U) JP-A-2-22450 (JP, U) JP-B-2-53656 (JP, B2) US Patent 3,438,979 (US, A) )

Claims (1)

(57) [Claims] 1. A motor, the orthogonal gear device with a motor and a gearbox having an output shaft disposed perpendicular to the motor, the output shaft of the gearbox, and a hollow hollow shaft type
The gear box is penetrated, and the mounting bolt holes of the gear box are square or rectangular apex positions.
And the output shaft of the gear box portion is moved away from the center of the square or rectangle.
And, on the side away from the removed result the gear box output shaft mounting bolt
The motor is connected between the line connecting the holes and the output shaft of the gear box.
Axes arranged, and hypoid pinion provided on the motor shaft, the meshing of the hypoid gear mounted on the shaft which is perpendicular by shifting the motor <br/> motor shaft and the axis, the motor shaft and the output shaft A motorized orthogonal gear device characterized by realizing orthogonality with the above.