JP5897793B2 - Intermediate gear reducer - Google Patents

Description

  The present invention relates to the field of gear reducers, motors, and motors with gear reducers.

  Conventionally, the geared motor torque is limited by the mechanical strength of the gear head combined with the motor. Therefore, in the high reduction ratio region, the torque cannot be increased beyond a certain value even if the reduction ratio is increased. there were. In order to improve the efficiency reduction of the motor in the high reduction ratio region, a method of using a motor with a small capacity in the high reduction ratio region is considered (for example, Patent Document 1). In Patent Document 1, in order to attach a motor with a small capacity to a gear head, in addition to the first motor mounting hole corresponding to the first mounting angle dimension on the motor mounting surface of the gear head, A second motor mounting hole corresponding to a small second mounting angle dimension is formed. Here, the first motor mounting hole and the second motor mounting hole are at positions rotated by a predetermined angle from each other around the axis of the input shaft of the gear head.

  However, as in Patent Document 1, in the method of forming the second mounting hole on the motor mounting surface of the gear head, it is necessary to form a specific mounting hole in the gear head, and the existing gear head cannot be used as it is. Currently, motor mounting angles and gear head mounting angles are generally lined up with the same dimensions. In order to increase the allowable torque of the gear head by combining a gear head that is larger than the mounting angle of the motor, it is necessary to match the fitting size of the motor and the gear head, and the design is changed so that the gear of the motor and the gear of the gear head mesh. Must. Therefore, many new product types and component types are required for the existing lineup.

JP 2003-299309 A

  In view of the above, the present invention, in a situation where the mounting dimensions of motors and gear heads are already lined up globally, in order to improve the reduction in motor efficiency in the high reduction ratio region, existing motors and gear heads, An object of the present invention is to provide a device that can be combined without further processing.

One aspect of the present invention is an intermediate gear reducer for assembling a gear reducer to a drive source, the input shaft having a connecting portion with the output shaft of the drive source, and the input gear of the gear reducer An output shaft having a connecting portion and transmitting the rotational motion transmitted through the input shaft to the input gear of the gear reducer; and an input side attachment of the gear reducer for attaching to the gear reducer A gear reducer mounting portion having a shape corresponding to the portion, and a drive source mounting portion having a shape corresponding to the output side mounting portion of the drive source for mounting on the drive source, the mounting angle of the drive source The drive source mounting portion is formed to have the same mounting angle as the size, the gear reducer mounting portion is formed to have the same mounting angle as the gear reducer, and the mounting angle is small. Gear reducer with large drive angle and mounting angle A series so that it can be combined, characterized in that it is possible to combine the large gear reducer of small driving source and frame size of frame size series.

  As an example, the width dimension of the gear reducer mounting portion is larger than the width dimension of the drive source mounting portion. The shaft diameter of the output shaft may be configured to be larger than the shaft diameter of the output shaft of the drive source. The input shaft and the output shaft may be configured as the same shaft, and the output shaft may be configured to mesh with the input gear of the gear reducer.

  For example, the connecting portion with the output shaft of the drive source includes a helical pinion that is attached to the input side of the single shaft and transmits rotational motion from the drive source, and the intermediate gear reducer is The one shaft further includes two bearings attached to the output side of the helical pinion and supporting the one shaft.

  A first end located in one direction intersecting the axial direction of the gear reducer mounting portion is in relation to a second end located in the one direction intersecting the axial direction of the drive source mounting portion. It may be configured to protrude.

  For example, the intermediate gear reducer according to the present invention may be configured by connecting a plurality of sub intermediate gear reducers having the same configuration as the intermediate gear reducer in the axial direction.

  The gear reducer to which the intermediate gear reducer according to the present invention is assembled may be any type of gear reducer. For example, the intermediate gear reducer according to the present invention may be assembled to a parallel shaft gear reducer, or may be configured to be assembled to an orthogonal shaft gear reducer.

  In the invention according to claim 1, the existing drive source and the existing gear reducer are assembled by assembling the intermediate gear reducer according to the present invention between the existing drive source (for example, a motor) and the existing gear reducer. A gear reducer with a large allowable torque can be assembled to a motor with a small capacity without further processing. As a result, the reduction in the efficiency of the motor in the high reduction ratio region is improved at low cost while utilizing the existing lineup relating to the motor and the gear reducer.

  In addition, when a conventional motor with a gear reducer is used at a reduction ratio at which the allowable torque of the gear reducer reaches a peak, a motor having a smaller capacity than the conventional motor is used for the intermediate gear reducer according to the present invention. By assembling, it is possible to obtain the same output torque as before with a smaller motor output than before. Therefore, an energy saving effect can be expected by using the invention of claim 1.

  According to the second aspect of the present invention, the gear speed reducer having the first mounting angle dimension and the drive having the second mounting angle dimension smaller than the first mounting angle dimension via the intermediate gear speed reducer according to the present invention. Sources can be combined. Small motors are often sold with brackets for assembly to other devices such as gearheads. As an example, the bracket has a substantially square shape with rounded corners. The width of the bracket is called the motor mounting angle.

  In the invention according to claim 3, it is possible to combine a drive source having a shaft diameter smaller than the shaft diameter that can be fitted into the gear reducer with the gear reducer via the intermediate gear reducer according to the present invention. become. In the invention which concerns on Claim 4, since the input shaft and the output shaft are comprised by the same shaft, the number of parts can be decreased and the gear reducer which concerns on this invention can be manufactured more simply.

  Since the invention according to claim 5 has two bearings, the axial load generated by the helical pinion acts on the first bearing when the rotational direction of the shaft is the first rotational direction. When the rotation direction of the shaft is the second rotation direction, it acts on the second bearing. Therefore, the life time of the bearing can be improved as compared with the case where the axial load is received by one bearing. In addition, since two bearings are arranged on the output side of the helical pinion on the one shaft, the distance between the two bearings can be shortened to the minimum necessary without interfering with the pinion. It is possible to use a large bearing.

  In the invention which concerns on Claim 6, the edge part of the gear reducer attachment part protrudes more outside than the edge part of a drive source attachment part in one direction which cross | intersects an axial direction. Therefore, when the drive source is attached to the drive source attachment portion, a space is formed in a differential region between the end portion of the drive source in the one direction and the end portion of the gear reducer attachment portion. This space can be used as a motor cable routing space or a terminal box installation space for a motor with a terminal box.

It is a figure which shows typically an example of the lineup of a motor and a gear head. It is a graph which shows the output torque of a gear head about each combination of the motor and gear head shown in FIG. (A) It is the figure which showed the intermediate gear reduction gear in 1st Embodiment with the motor and gear head to combine. (B) It is a figure which shows the state which assembled | attached the motor and gear head which are shown to FIG. 3 (A) to the intermediate gear reduction gear. It is a graph which shows the output torque of the geared motor shown in FIG.3 (B). (A) It is a figure which shows the fixing method of the motor, intermediate gear reducer, and gear head which are shown in FIG. 3 (B). (B) It is a figure which shows the method of fixing the geared motor of FIG. 5 (A) to another apparatus. It is the figure which showed the intermediate gear reduction gear in 2nd Embodiment with the motor and gear head to combine. It is a graph which shows the output torque of the geared motor shown in FIG. It is the figure which showed two intermediate gear reduction gears in 3rd Embodiment with the motor and gear head to combine. (A) It is the figure which showed the intermediate gear reduction gear in 4th Embodiment with the motor and gear head to combine. (B) It is a figure which shows the state which assembled | attached the motor and gear head shown to FIG. 9 (A) to the intermediate | middle gear reduction gear.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 schematically shows an example of a lineup of motors and gear heads. In the description of the embodiments, “motor” corresponds to “drive source” in claims, and “gear head” corresponds to “gear reducer” in claims.

  In FIG. 1, the relationship between the motor output W1 of the motor M1, the motor output W2 of the motor M2, the motor output W3 of the motor M3, and the motor output W4 of the motor M4 is W1 <W2 <W3 <W4. The relationship between the maximum allowable torque T1 of GH1, the maximum allowable torque T2 of the gear head GH2, the maximum allowable torque T3 of the gear head GH3, and the maximum allowable torque T4 of the gear head GH4 is T1 <T2 <T3 <T4. The mounting surfaces of the motors M1 to M4 and the gear heads GH1 to GH4 are each formed in a substantially square shape. The width dimension of this mounting surface, that is, the motor mounting angle dimension and the gear head mounting angle dimension are lined up with the same dimension, and the motor M1 and the gear head GH1 have a common fitting dimension D1. M2 to M4 and the gear heads GH2 to GH4 also have common fitting dimensions D2 to D4, respectively. The configuration (shape, size, arrangement, etc.) of the gear g1 formed by gear cutting on the output shaft of the motor is selected so as to mesh with the gear on the input side of the gear head GH1, and similarly, the motor M2 ˜M4 gears g2 to g4 are also formed so as to mesh with the input side gears of the gear heads GH2 to GH4, respectively. As a result, the motor M1 can be assembled to the gear head GH1, the motor M2 can be assembled to the gear head GH2, the motor M3 can be assembled to the gear head GH3, and the motor M4 can be assembled to the gear head GH4.

  FIG. 2 shows output torques T1 to T4 of the gear heads for the combination of the motor M1 and the gear head GH1, the combination of the motor M2 and the gear head GH2, the combination of the motor M3 and the gear head GH3, and the combination of the motor M4 and the gear head GH4. As shown in the graph of FIG. 2, in the combination of the motor M1 and the gear head GH1, when the reduction ratio is equal to or greater than Rx, the output torque is limited to the allowable torque T1 due to the mechanical strength of the gear head GH1. In order to increase the output torque, for example, even when the gear heads GH2 to GH4 having a maximum allowable torque larger than that of the gear head GH1 are combined with the motor M1, the motor and the gear head are fitted in the motor and the gear head having different mounting angle dimensions. Since the dimensions D1 to D4 and the configurations of the gears g1 to g4 are different from each other, they cannot be combined.

  Therefore, the present invention provides an intermediate gear reducer that is assembled between a motor and a gear head in order to combine a gear head having a larger maximum allowable torque with an existing motor.

[First Embodiment]
3A and 3B are schematic cross-sectional views of the intermediate gear reducer 1 for combining the motor M1 and the gear head GH2. FIG. 3A shows the motor M1 and the gear head GH2 assembled to the intermediate gear reducer 1 together with the intermediate gear reducer 1, respectively. Here, the internal structure of the intermediate gear reducer 1 is shown, and the internal structure of the gear head GH2 is omitted as appropriate. The motor M1 and the gear head GH2 are off-the-shelf products in the existing lineup. As an example, the gear head GH2 is a parallel shaft gear head. FIG. 3B shows a state where the motor M1 and the gear head GH2 are assembled to the intermediate gear reducer 1.

  As shown in FIG. 3A, the intermediate gear reducer 1 includes a motor mounting surface 2 and a gear head mounting surface 3 that extend in a direction crossing the axial direction. The opening 4 formed in the motor mounting surface 2 has the same dimension as the dimension D1 of the convex portion 22 in the gear head mounting surface 21 of the motor M1. In this embodiment, the convex part 22 of the motor M1 has a regular circle when viewed from the axial direction. Therefore, the shape of the opening 4 of the intermediate gear reducer 1 is also the same circular shape, and the dimension D1 is the diameter of the convex portion 22 and the opening 4. The gear head mounting surface 21 of the motor M1 has a substantially square outer edge when viewed from the axial direction. The outer edge of the motor mounting surface 2 of the intermediate gear reducer 1 also has a substantially square shape with the same size and shape as the gear head mounting surface 21 of the motor M1, and the mounting angle dimension of the motor M1 (the width of the gear head mounting surface 21). The same mounting angle dimension as (dimension).

  The convex portion 5 formed on the gear head mounting surface 3 has the same dimension as the dimension D2 of the opening 31 formed on the motor mounting surface 30 of the gear head GH2. As shown in FIG. 1, the motor M2 can be directly attached to the motor attachment surface 30 of the gear head GH2, but the motor M1 cannot be attached directly. In this embodiment, the convex part 5 of the intermediate gear speed reducer 1 has a regular circular shape when viewed from the axial direction. The shape of the opening 31 of the gear head GH2 is also the same circular shape, and the dimension D2 is the diameter of the convex portion 5 and the opening 31. Further, when viewed from the axial direction, the gear head mounting surface 3 of the intermediate gear reducer 1 is configured to have a substantially square outer edge, and the motor mounting surface 30 of the gear head GH2 has a substantially square shape having the same outer dimension and shape. have. The width dimension of the gear head mounting surface 3 of the intermediate gear reducer 1 and the width dimension of the motor mounting surface 30 of the gear head GH2 (mounting angle dimension of the gear head GH2) are the same as the mounting angle dimension of the motor M2. In the present embodiment, the motor attachment surface 2 and the opening 4 constitute a “drive source attachment portion”, and the gear head attachment surface 3 and the convex portion 5 constitute a “gear reducer attachment portion”.

  In the intermediate gear reducer 1, an input shaft that transmits the rotational motion from the motor M <b> 1 to the intermediate gear reducer 1 and an output shaft that outputs to the gear head GH <b> 2 are constituted by a single shaft 6. On the input side of the shaft 6, a pinion 8 that meshes with a gear g <b> 1 formed on the output shaft 23 of the motor M <b> 1 is provided, and a first bearing 9 and a second bearing that are located on the output side of the pinion 8 in the shaft 6. 10 supports the shaft 6.

  In the present embodiment, a helical tooth is used for the pinion 8 in order to suppress noise. The 1st bearing 9 and the 2nd bearing 10 are the same components of the same shape and the same dimension, and are provided adjacent to each other. One end of the shaft 6 protrudes to the output side to form an output shaft, and the shaft diameter of the output shaft 6 is larger than the shaft diameter of the output shaft 23 of the motor M1. The output shaft 6 has a gear 6a formed on the surface thereof by gear cutting. Here, the gear 6a has the same configuration as the gear g2 of the motor M2 in FIG. 1 so as to mesh with the gear 34 provided on the input shaft 33 of the gear head GH2.

  An end portion 3a located in one direction intersecting the shaft 6 of the gear head mounting surface 3 protrudes outward from the end portion 2a positioned in the one direction of the motor mounting surface 2, that is, toward the one direction side. The gear head mounting surface 3 and the convex portion 5 are arranged so that the shaft 6 is centered. On the other hand, in the motor mounting surface 2 and the opening 4, the shaft 6 is not positioned at the center, but the motor mounting surface 2 and the opening 4. Are arranged so as to be shifted to one outer edge side (end portion 2a side).

  The motor M1 and the gear head GH2 are coupled via the intermediate gear reducer 1 as shown in FIG. The motor M1 and the intermediate gear reducer 1 are coupled by fitting the convex portion 22 of the gear head mounting surface 21 of the motor M1 into the opening 4 of the motor mounting surface 2 of the intermediate gear reducer 1, and the output shaft 23 of the motor M1. The gear g1 meshes with the pinion 8 of the intermediate gear reducer 1.

  The intermediate gear reducer 1 and the gear head GH2 are coupled by the convex portion 5 of the gear head mounting surface 3 of the intermediate gear reducer 1 being fitted into the opening 31 of the motor mounting surface 30 of the gear head GH2. The output shaft 6 meshes with a gear 34 provided on the input shaft 33 of the gear head GH2.

  The rotational motion output from the motor M1 is decelerated by the meshing of the gear g1 of the motor M1 and the pinion 8 of the intermediate gear reducer 1 and is output via the output shaft 6. The reduction ratio of the intermediate gear reducer 1 is such that the maximum allowable torque T2 of the motor M2 + gearhead GH2 in FIG. 2 is divided by the maximum allowable torque T1 of the motor M1 + gearhead GH1, that is, a value as close as possible to T2 / T1. Is set. The rotational motion output via the output shaft 6 is transmitted to the input shaft 33 of the gear head GH2 by meshing between the gear 6a formed on the output shaft 6 and the gear 34 of the gear head GH2. The rotational motion transmitted to the gear head GH2 through the input shaft 33 is decelerated by one or a plurality of gears and is output through the output shaft 35. The gear head GH2 is an existing gear head, and the internal configuration and operation thereof are not limited with respect to the present invention. Therefore, a detailed description of the internal structure and operation of the gear head GH2 is omitted.

  As shown in FIG. 3B, the output torque obtained in the high reduction ratio region can be increased by combining the motor M1 with the gear head GH2 via the intermediate gear reducer 1. The graph of FIG. 4 shows the output torque in the high reduction ratio region (more than the reduction ratio Rx) with a dotted line for the geared motor of FIG. As shown in this graph, by combining the motor M1 with the gear head GH2 via the intermediate gear reducer 1, the output torque of the gear head limited by the maximum allowable torque T1 is output even if the reduction ratio Rx ′ is increased. The torque can be increased to T2.

  Further, in the region surrounded by the alternate long and short dash line in the graph of FIG. 4 (region of the reduction ratio Rx ′ or more), the output torque T2 obtained by the combination of the motor M2 and the gear head GH2, and the combination of the motor M1 and the gear head GH2 The obtained output torque T2 has the same value. Therefore, in this region, by combining the motor M1 with the gear head GH2 instead of the motor M2, the motor output is reduced from W2 to W1 while maintaining the output torque, so that an energy saving effect can be achieved.

  The above effect is obtained by combining the gear head GH2 having a larger maximum allowable torque with the motor M1 having a small capacity, and such a combination is possible by the intermediate gear reducer 1. As described above, by assembling the intermediate gear reducer 1 between the motor M1 and the gear head GH2, the motor M1 and the gear head GH2 can be combined without processing the motor M1 and the gear head GH2. Since the intermediate gear reducer 1 and the motor M1 and the gear head GH2 to be assembled to each other have a separate structure, by preparing the intermediate gear reducer 1 having different sizes, various motors and gear heads can be used instead of the motor M1 and the gear head GH2. The geared motor lineup can be realized at low cost.

  Moreover, since the intermediate gear reduction gear 1 in this embodiment has the two bearings 9 and 10, the axial load produced by the helical pinion 8 is when the rotation direction of the shaft is the first rotation direction. Acts on the first bearing 9 and acts on the second bearing 10 when the rotational direction of the shaft is the second rotational direction. Therefore, the life time of the bearing can be improved as compared with the case where the axial load is received by one bearing. In addition, since the two bearings 9 and 10 are disposed on the output side of the helical pinion 8 on the shaft 6, the distance between the two bearings 9 and 10 is minimized without interfering with the pinion 8. It can be shortened to the limit, and a large-sized bearing can also be adopted. Furthermore, in this embodiment, since the same parts are used for the two bearings 9 and 10, the number of parts can be reduced.

  Further, in the present embodiment, the end portion 3 a that is an end portion of the gear head mounting surface 3 and is positioned in one direction intersecting the shaft 6 is more in the one direction than the end portion 2 a that is positioned in the one direction of the motor mounting surface 2. Protrudes to the side. Therefore, when the motor M1 and the gear head GH2 are assembled to the intermediate gear reducer 1, the end of the motor M1 in the one direction and the end of the gear head mounting surface 3 as shown by a two-dot chain frame S in FIG. Since the space S is formed in the difference area from the portion 3a, this space S can be used as a motor cable routing space or a terminal box installation space for a motor with a terminal box.

  FIG. 5A shows a method of fixing the combined motor M1, intermediate gear reducer 1, and gear head GH2. FIG. 5A shows three views in a state where the motor M1, the intermediate gear reducer 1, and the gear head GH2 are combined. The drawing on the left side of the drawing is a view from the motor M1 side, the drawing at the center is a side view, and the drawing on the right side is a view from the gear head GH2 side. Through holes (not shown) are formed at the four corners of the gear head mounting surface 21 (see FIG. 3A) of the motor M1. The motor M1 is connected to the intermediate gear reducer 1 by a fixing screw 40 through the through hole and a screw hole (not shown) formed in the motor mounting surface 2 (see FIG. 3A) of the intermediate gear reducer 1. Fixed to.

  Two through holes (not shown) are formed in the peripheral portion of the gear head mounting surface 3 of the intermediate gear reducer 1. The intermediate gear reducer 1 is fixed to the gear head GH2 by a fixing screw 42 through this through hole and a screw hole (not shown) formed in the motor mounting surface 30 of the gear head GH2. In addition, through holes 44 are formed at the four corners of the gear head mounting surface 3 (see FIG. 3A) of the intermediate gear reducer 1, and are continuous with the holes penetrating from the input side to the output side of the gear head GH2. The through hole 44 is provided for attaching a geared motor, which is a combination of the motor M1 and the gear head GH2, via the intermediate gear reducer 1 to another device.

  FIG. 5B shows a method of fixing the geared motor to another device. The fixing screw 46 extends through the through hole 44 to a screw hole of a mounting plate 48 for mounting another device, and fixes the geared motor and the other device. Thus, in this embodiment, in order to increase the fastening strength of the geared motor and other devices, a structure is employed in which the intermediate gear reducer 1 and the gear head GH2 are both fixed to the other devices.

[Second Embodiment]
In the first embodiment described above, the intermediate gear reducer 1 is configured to combine the motor M1 and the gear head GH2. However, other motors and gear heads can be combined with the intermediate gear reducer according to the present invention. . FIG. 6 shows an intermediate gear reducer 1 for combining the motor M1 and the gear head GH3. The intermediate gear reducer 1 shown in FIG. 6 is the same as the intermediate gear reducer 1 shown in FIG. 3A except for the fitting dimension D3 of the convex portion 5 on the gear head mounting surface 3. In the intermediate gear reducer 1 in FIG. 6, the same reference numerals are given to the components corresponding to the intermediate gear reducer 1 in FIG. Also, regarding the gear head GH3, the same reference numerals are given to the components corresponding to the gear head GH2 shown in FIG.

  Since the gear head GH3 to be attached has a larger allowable torque and size than the gear head GH2, the shaft diameter of the shaft 6, the pinion 8, and the bearings 9 and 10 in the intermediate gear reducer 1 shown in FIG. A size larger than that shown in (B) is used. Moreover, since the dimension of the convex part 5 of the gear head mounting surface 3 is D3 longer than D2, the difference area between the end part 3a and the end part 2a is larger than that shown in FIGS. 3 (A) and 3 (B). It is getting bigger.

  In the second embodiment shown in FIG. 6, the protrusion 5 formed on the gear head mounting surface 3 has the same dimension as the dimension D3 of the opening 31 formed on the motor mounting surface 30 of the gear head GH3. Similar to the first embodiment, the intermediate gear reducer 1 and the gear head GH3 are formed by fitting the convex portion 5 of the gear head mounting surface 3 of the intermediate gear reducer 1 into the opening 31 of the motor mounting surface 30 of the gear head GH3. Join.

  The graph of FIG. 7 shows the output torque in a high reduction ratio region (more than the reduction ratio Rx) with a dotted line for a geared motor in which the motor M1 and the gear head GH3 are combined via the intermediate gear reducer 1 shown in FIG. . As shown in this graph, by combining the motor M1 with the gear head GH3, the output torque of the gear head can be increased to the output torque T3 even if the reduction ratio is increased to Rx ″. Thus, in the second embodiment, the output torque of the gear head can be increased in a further high reduction ratio region (reduction ratio: Rx ′ to Rx ″).

  Similarly, for the combination of the motor M1 and the gear head GH4, the combination of the motor M2 and the gear head GH3 or the gear head GH4, and the combination of the motor M3 and the gear head GH4, the intermediate gear reducer according to the present invention is disposed between the motor and the gear head. It can be realized by assembling to.

[Third Embodiment]
A plurality of intermediate gear reducers can also be used depending on the torque or rotational speed required at the gear head output shaft. FIG. 8 illustrates a geared motor in which two intermediate gear reducers are combined, in which the motor, the intermediate gear reducer, and the gear head are separated. The sub intermediate gear reducer 15A and the sub intermediate gear reducer 15B shown in FIG. 8 constitute the intermediate gear reducer 15 by being connected in the axial direction. Each of the sub intermediate gear reducer 15A and the sub intermediate gear reducer 15B has components corresponding to the intermediate gear reducer 1 of FIG. In the sub intermediate gear reducers 15A and 15B, components corresponding to those of the intermediate gear reducer 1 in FIG. Also, regarding the gear head GH3, the same reference numerals are given to the components corresponding to the gear head GH2 shown in FIG. In the sub intermediate gear reducer 15A, the opening 4 formed in the motor mounting surface 2 has the same dimension D1 as the convex portion 22 of the motor M1 so that the motor M1 and the gear head GH2 can be combined. The convex portion 5 formed on the surface 3 has the same dimension D2 as the opening portion 31 (see FIG. 3A) of the gear head GH2. In the sub intermediate gear reducer 15B, the opening 4 formed in the motor mounting surface 2 has the same dimension D2 as the convex portion 22 (not shown) of the motor M2 so that the motor M2 and the gear head GH3 can be combined. And the convex part 5 formed in the gear head attachment surface 3 has the same dimension D3 as the opening part 31 of gear head GH3.

  Since the convex portion 5 of the gear head mounting surface 3 in the sub intermediate gear reducer 15A and the opening 4 of the motor mounting surface 2 in the sub intermediate gear reducer 15B have the same fitting dimension D2, the sub intermediate gear reducer The sub intermediate gear reducer 15A and the intermediate gear reducer 15B can be coupled by fitting the convex portion 5 of 15A into the opening 4 of the sub intermediate gear reducer 15B. In the intermediate gear reducer 15 configured by coupling the sub intermediate gear reducer 15A and the intermediate gear reducer 15B, the motor M1 is fitted into the opening 4 of the intermediate gear reducer 15A, and the convex portion 5 of the intermediate gear reducer 15B. Is fitted into the opening 31 of the gear head GH3 to realize a geared motor combining the motor M1 and the gear head GH3. As shown in the third embodiment, by combining a plurality of intermediate gear reducers having different sizes between the motor and the gear head, the combination of the motor and the gear head can be realized in various variations.

[Fourth Embodiment]
The intermediate gear reducer of the present invention can be combined not only with a parallel shaft gear head but also with an orthogonal shaft gear head. FIGS. 9A and 9B show an intermediate gear reducer 50 in which the motor M1 and the orthogonal shaft gear head GH20 are combined, and the internal structure of the intermediate gear reducer 50 and the orthogonal shaft gear head GH20 is shown. FIG. 9A shows a state in which the motor M1, the intermediate gear reducer 50, and the orthogonal shaft gear head GH20 are separated, and FIG. 9B shows a geared motor in which these are combined. In the intermediate gear reducer 50 shown in FIGS. 9A and 9B, the same reference numerals are given to the components corresponding to the intermediate gear reducer 1 shown in FIG.

  The intermediate gear reducer 50 includes an opening 4 having the same dimension as the dimension D1 of the convex portion 22 of the motor M1 in order to mount the motor M1, and in order to mount the orthogonal shaft gear head GH20, the motor mounting surface in the orthogonal shaft gear head GH20. The convex part 5 which has the same dimension as the dimension D2 of 60 opening 61 is provided. The bearing 10 housed in the case of the intermediate gear reducer 1 in the intermediate gear reducer 1 is provided outside the case while supporting the output shaft 6 in the intermediate gear reducer 50. This is because the gear engagement on the input side is more complicated in the orthogonal shaft gear head than in the parallel shaft gear head, so that the bearing 10 that supports the output shaft 6 is accommodated in the orthogonal shaft gear head GH20 together with the output shaft 6. This increases the positioning accuracy of the output shaft 6 in the orthogonal shaft gear head GH20. The gear 6a is gear-cut into the output shaft 6 so as to mesh with the gear 64 connected to the input shaft 63 in the orthogonal shaft gear head GH20. In the present embodiment, the gear head GH20 has a hypoid gear as the gear 64.

  As shown in FIG. 9B, the convex portion 5 of the intermediate gear speed reducer 50 is fitted into the opening 61 of the orthogonal shaft gear head GH20, and the bearing 10 and the output shaft 6 are accommodated inside the orthogonal shaft gear head GH20. The rotational motion input to the intermediate gear reducer 50 via the output shaft 23 of the motor M1 and the pinion 8 of the intermediate gear reducer 50 is caused by the engagement of the gear 6a of the output shaft 6 and the gear 64 of the orthogonal shaft gear head GH20. 63 and is output via the output shaft 65 by the meshing of the gear 66 connected to the input shaft 63 and the gear 67 connected to the output shaft 65.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention. For example, in the above embodiment, the motor and gear head lineup illustrated in FIG. 1 is used for explanation, but the types of motors and gear heads and combinations thereof are not limited, and various motors and various types of gear heads are used. The intermediate gear reducer according to the present invention can be applied to the gear head.

1,15,50 Intermediate gear reducer M1 motor (drive source)
GH2, GH3, GH20 gear head (gear reducer)
2 Motor mounting surface of intermediate gear reducer 2a End of motor mounting surface of intermediate gear reducer (second end)
3 Gear head mounting surface of intermediate gear reducer 3a End of gear head mounting surface of intermediate gear reducer (first end)
4 Opening of intermediate gear reducer 5 Convex part of intermediate gear reducer 6 Shaft of intermediate gear reducer 8 Pinion of intermediate gear reducer 9, 10 Bearing of intermediate gear reducer 15A, 15B Sub intermediate gear reducer 23 Motor output axis

Claims (4)

An intermediate gear reducer for assembling the gear reducer to the drive source,
An input shaft having a connecting portion with the output shaft of the drive source;
An output shaft having a connecting portion with the input gear of the gear reducer, and transmitting the rotational motion transmitted through the input shaft to the input gear of the gear reducer;
A gear reducer mounting portion having a shape corresponding to the input side mounting portion of the gear reducer for mounting on the gear reducer;
A drive source mounting portion having a shape corresponding to the output side mounting portion of the drive source for mounting to the drive source;
The drive source mounting portion is formed in the mounting angle size that is the same as the mounting angle size of the drive source, and the gear reducer mounting portion is formed in the mounting angle size that is the same as the mounting angle size of the gear reducer. The drive source with a small mounting angle and the gear reducer with a large mounting angle can be combined into a series, and a drive source with a small mounting angle can be combined with a gear reducer with a large mounting angle. An intermediate gear reducer characterized by being able to. The intermediate gear reducer according to claim 1, wherein the input shaft and the output shaft are configured as the same shaft, and the output shaft is configured to mesh with the input gear of the gear reducer. The connecting portion with the output shaft of the drive source includes a helical pinion that is attached to the input side of the single shaft and transmits the rotational motion from the drive source,
The intermediate gear reducer according to claim 2, further comprising two bearings attached to the output side of the helical pinion on the single shaft and supporting the single shaft. . A first end located in one direction intersecting the axial direction of the gear reducer mounting portion is in relation to a second end located in the one direction intersecting the axial direction of the drive source mounting portion. The intermediate gear reducer according to any one of claims 1 to 3, wherein the intermediate gear reducer is protruded.

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