JP5292971B2 - Bearing adapter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the vibration at high-speed drive and improve the accuracy of a torque meter which becomes a part of a load section, by improving the convenience of the abolition of lubricant in a rotator which is composed of a motor and the load section. <P>SOLUTION: A bearing adaptor is interposed between the motor 2, which has a drive for rotating a motor shaft 22, and the load section 4. The bearing adaptor has a shaft 32, which rotates synchronously with the motor shaft 22, an input side adaptor 33, which connects the shaft 32 with the motor shaft 33, an output side adaptor 34, which transmits the rotation of the shaft 32 to the load section 4, a bearing section 361, which supports the shaft 32 rotatably, and a casing 31, which accommodates these components. The inner face of, at least, the bottom of the casing 31 is inclined or curved so that the side of the motor 2 may be lower than the side of the load section 4, and also an oil discharge port 313, which discharges the lubricant, is formed at the corner on the side of the motor 2 at the bottom of this casing 21. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a bearing adapter used by being attached to a motor.

  Conventionally, various devices for testing the operation of a load device connected to a motor shaft by rotating a motor shaft (motor shaft) at high speed have been considered. In such a test apparatus, components that generate friction and heat, such as bearings and stator cores, are incorporated, and therefore it is necessary to supply lubricating oil to these components while the motor is driven to rotate. . Therefore, each of the motor and the load device is provided with an oil passage (supply passage) for supplying lubricating oil from the outside in the radial direction (see, for example, Patent Document 1). However, in such a configuration, since it is necessary to separately supply the lubricating oil from each supply path, not only the structure is complicated, but also the work load of supplying the lubricating oil is increased.

Therefore, the present applicant extends the shaft from the motor to the load device, and forms an oil passage in the shaft so that the lubricating oil can be supplied to the entire device by supplying oil to one place on the motor side. A rotating device is proposed (for example, see Patent Document 2).
JP 2007-040835 A Japanese Patent Application No. 2007-131565 Application Specification

  By the way, in the rotating device disclosed in Patent Document 2 described above, the casing as a whole has a generally cylindrical shape that is installed with the central axis kept substantially horizontal. For this reason, although this rotating device can be very easily used for refueling, when the lubricating oil in the casing is discarded, oil draining ports are provided at multiple locations, or the casing is tilted to lubricate the oil draining ports. Without collecting the oil, the lubricant could not be discarded.

  In addition, this type of device is provided with a torque meter that measures the torque of the motor shaft. However, when the motor shaft rotates at high speed, there is a problem in reducing vibration and improving the accuracy of the measurement value by the torque meter. It was said. In order to achieve these, the shaft shaft end overhang (the length of the shaft shaft end taken out from the motor) should be as short as possible, and the shaft's radial deflection may be reduced. In addition, it can be said that it is desirable not to sandwich other members between the torque meter and the load device. However, in the device described in Patent Document 2, a torque meter is directly attached to the shaft, and a member such as a coupling or a bearing of the load device is interposed between the torque meter and the load device. The structure of the load device on the motor side incorporating the motor is also somewhat complicated. The torque meter itself is one of the load elements in the radial direction of the shaft together with the load device. Therefore, if the shaft overhang can be further shortened or the weight of the load element in the radial direction of the shaft can be reduced, vibration during high-speed rotation can be reduced and the accuracy of the torque meter can be further improved. It is considered possible.

  In view of the problems as described above, the present invention provides a bearing adapter for simplifying disposal and supply of lubricating oil in a rotating device, and realizing reduction in vibration and improvement in measurement accuracy using a torque meter. It is something to try.

That is, the bearing adapter according to the present invention is applied to a test apparatus that tests the rotational performance of a motor having a drive unit that rotationally drives the motor shaft, and the load unit is connected to the load unit and driven by the motor shaft together with the load unit. a torque meter which constitutes a, which is mounted between the motor, a shaft that rotates in synchronization with the motor shaft, an input-side adapter for coupling the shaft and the motor shaft, the load unit rotation of the shaft An output-side adapter that transmits to the shaft, a bearing portion that rotatably supports the shaft, and a casing that accommodates the shaft, the input-side adapter, the output-side adapter, and the bearing portion, and the axial direction of the shaft is maintained substantially horizontal. the inner surface of at least the bottom of the casing to be installed in a state, the motor side than the load side low and With inclined or curved formed so, in the corner portion of the motor side at the bottom of the casing, characterized in that form the oil discharge port for discharging the lubricating oil supplied to the inner casing is there.

  Here, the load portion connected to the opposite side of the motor of the bearing adapter of the present invention via the output-side adapter can be a load element in the radial direction of the motor shaft and the shaft of a torque meter, a load device, etc., for example. Applicable to equipment and parts.

  When such a bearing adapter is mounted on the motor, at least in this bearing adapter, the injected lubricating oil flows and gathers at the corner on the motor side along the inclined or curved inner surface on the bottom side of the casing. Since the oil can be discharged from the oil discharge port formed at the corner, the convenience of discarding the lubricating oil is improved. Also, if the outer surface as well as the inner surface of the bottom portion of the casing are similarly inclined or curved, the weight on the load portion side of the casing is reduced, the load of the load element is reduced, and the accuracy of the torque meter is improved. It can be. Further, since the torque meter can be provided as a separate member without being incorporated in the motor or the bearing adapter, the structure of the bearing adapter can be simplified together with the motor. In addition, it is possible to adopt a configuration in which a torque meter is connected to the output adapter provided in the bearing adapter and a load device is connected to the torque meter, so the shaft overhang can be shortened. Reduce vibration due to unbalance during high-speed rotation, reduce the load in the radial direction of the shaft to reduce bending, and avoid other parts as much as possible between the torque meter and the load device Thus, the accuracy of the torque meter can be further improved.

  In such a bearing adapter of the present invention, in order to easily collect lubricating oil on the motor side at the bottom portion of the casing and to obtain an efficient casing shape that can reduce the weight on the load portion side of the casing, the casing is provided with a motor. It is desirable that the cross-sectional shape be gradually tapered from the side toward the load part side.

  Further, in order to distribute the lubricating oil in the bearing adapter by effectively using the configuration of the bearing adapter as described above, an oil passage for flowing the lubricating oil is formed in the shaft, and this oil path is formed in the internal space of the casing. It is effective to communicate with.

  In this case, if the motor shaft forms an oil passage through which the lubricating oil flows along its axis, the bearing adapter is further provided with an oil adapter that communicates the oil passage of the shaft with the oil passage of the motor shaft. Since the oil path between the motor and the bearing adapter is connected, for example, if lubricating oil is supplied only to the motor shaft on the motor side, the lubricating oil can flow into the bearing adapter, so the convenience of supplying lubricating oil Will also improve.

  Furthermore, when the oil drain port formed in the bearing adapter casing communicates with the lubricant oil drain port formed in the motor, the lubricant oil can be discarded only from the oil drain port of the bearing adapter. Further, the convenience and workability of disposal of the lubricating oil can be further improved.

  According to the present invention, the bearing adapter interposed between the motor and the load portion has a shape in which the inner surface thereof is inclined or curved so that the lubricating oil collects on the motor side at the bottom of the casing. It is possible to improve the convenience of disposal of the lubricating oil in the adapter. Also, by reducing the weight on the load side of the casing with such a shape, the radial load acting on the shaft is reduced, and for example, a torque meter that is one of the load elements connected to the output side adapter Accuracy can be improved. In addition, when connecting a torque meter to the output adapter and connecting a load device to the torque meter as described above, the number of parts existing between the torque meter and the load device is reduced while reducing the overhang of the shaft. It is also possible to reduce vibration during high-speed rotation and further improve the accuracy of the torque meter. Furthermore, since the motor, the bearing adapter, and the torque meter can be separate members, the structure of the bearing adapter itself can be simplified.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  A bearing adapter 3 according to this embodiment whose main part is viewed from the rear in FIG. 1 is shown in a perspective view. The bearing adapter 3 is applied to a test apparatus 1 for testing the rotational performance of a motor, and includes a motor 2 and a torque meter 4. It is attached in between. A load device (not shown) is further connected to the torque meter 4. The torque meter 4 and the load device constitute a load unit in the present invention. The motor 2 is placed and fixed on the pedestal 5. 2 is a rear view of the test apparatus 1, FIG. 3 is a sectional view taken along line AA in FIG. 2, FIG. 4 is a sectional view taken along line BB, FIG. 5 is an end view taken along line CC in FIG. FIG. 7 is a sectional view showing, in particular, an enlarged main part of FIG. 3, and FIG. Hereinafter, each part is demonstrated concretely.

  The motor 2 is composed of, for example, a dynamo device simulating an engine, and includes a rotatable motor shaft 22 in a cylindrical casing 21 as shown in FIGS. 1, 3, and 4. A front cover (not shown) and a rear cover 23 are attached to both ends of the casing 21 in the longitudinal direction, and the end portion of the motor shaft 22 is slightly protruded through the central portion of the rear cover 23. Further, the rear cover 23 is formed with a bearing portion 231 that supports the motor shaft 22 facing forward, and a plurality of dampers (for example, squeeze film dampers) 232 are provided on the bearing portion 231. The other end of the motor shaft 22 is supported by an appropriate bearing provided near the front cover described above.

  Further, although not shown, the motor shaft 22 is provided with a cylindrical permanent magnet fixed to the outer peripheral surface thereof, and further provided with a cylindrical stator core having a coil radially outward of the permanent magnet. Further, as shown in FIG. 3, the motor shaft 22 is formed with a thrust oil passage 221 extending in the longitudinal direction in the central portion in the radial direction, and further, an appropriate position of the thrust oil passage 221 communicates with the inside of the casing 21. By forming the plurality of radial oil passages 222 in this way, the lubricating oil injected from the outside is distributed to the inside of the motor 2 through the motor shaft 22.

  The bearing adapter 3 includes a casing 31 that houses internal mechanical components, a shaft 32, an input-side adapter 33 that connects the shaft 32 to the motor shaft 22, and an output-side adapter 34 that connects the shaft 32 to the torque meter 4. Has mainly.

  As shown in each figure, the casing 31 is formed by integrally forming one end of a hollow body 311 having a substantially truncated cone shape and a mounting end 312 having substantially the same diameter as the casing 21 of the motor 2. The end 312 is firmly attached to the rear cover 23 of the motor 2 with a bolt or the like (not shown). Each of the body portion 311 and the attachment end portion 312 has a shape in which the diameter on the motor 2 side is large and is inclined so that the diameter gradually decreases toward the torque meter 4 side.

  The end portion of the motor shaft 22 extends to the vicinity of the flange portion 312, and the end portion of the motor shaft 22 and the end portion of the shaft 32 are connected by the input side adapter 33. Here, the shaft 32 is a hollow member in which a thrust oil passage 321 extending in the longitudinal direction is formed in the central portion in the radial direction similarly to the motor shaft 22, and the thrust oil passage 221 of the motor shaft 22 and the thrust oil passage of the shaft 32 are formed. The shaft 32 is also connected to the motor shaft 22 by the oil adapter 35 by connecting the oil adapter 321 to the motor shaft 22 with a substantially cylindrical oil adapter 35. The input side adapter 33 includes an inner adapter 331 and an outer adapter 332. The inner adapter 331 is a member that allows the thrust oil passages 221 and 321 to communicate with each other through the oil adapter 35 by fitting the end of the motor shaft 22 into one end and inserting the oil adapter 35 into the other end. The outer adapter 332 is a tubular member that connects the inner adapter 331 and the shaft 32 by being fitted inside. Similarly to the motor shaft 22, the shaft 32 is formed with a plurality of radial oil passages 322 for communicating the thrust oil passage 321 and the internal space of the casing 31, and the thrust oil passage 221 of the motor shaft 22, the oil adapter 35, Lubricating oil that has circulated through the thrust oil passage 321 and the radial oil passage 322 of the shaft 32 passes through an oil discharge port 313 formed obliquely downward toward the bottom of the mounting end 312 of the casing 31 in the bearing adapter 3. To be discharged. Further, a discharge port 233 is formed which communicates with the bottom of the casing 21 of the motor 2 and extends toward the bearing adapter 3 on the rear cover 23 and communicates with the oil discharge port 313 in the casing 31 of the bearing adapter 3. The lubricating oil circulated in the casing 21 of the motor 2 can also be discharged collectively from the oil discharge port 313 of the bearing portion 3. Although not shown, each radial oil passage 222, 322 is equipped with an injection nozzle for injecting lubricating oil.

  Further, two covers of the inner cover 36 and the outer cover 37 are firmly attached to the other end portion of the casing 31 with bolts or the like (not shown). The inner cover 36 is formed so that a cylindrical bearing portion 361 for inserting and supporting the shaft 32 is inserted into the casing 31. The bearing portion 361 is provided with a plurality of O-rings 362. . The outer cover 37 is a ring-shaped member that closes the casing 31 together with the inner cover 36 in a state where the shaft 32 penetrates and protrudes at the center. A flange portion 34 for connecting the torque meter 4 is fixedly attached to the end portion of the shaft 32 protruding from the outer cover 37. The flange portion 34 is a member corresponding to the output side adapter in the present invention. The flange portion 34 is formed by integrally forming a cylindrical base end portion 341 that is fixedly fitted to the outer periphery of the distal end portion of the shaft 32 and a ring-shaped attachment portion 342 that fixes the torque meter 4. is there. A flat surface 341a is formed on a part of the outer peripheral surface of the base end portion 341 as shown in FIGS. 5, 6, and 7 for the reason described later.

  As shown in the drawings, the torque meter 4 includes a first disk portion 41 fixed to the attachment portion 342 of the flange portion 34 with a bolt or the like, and a specimen adapter for connecting a load device (not shown) to the torque meter 4. The second disk portion 42 to which 6 is fixedly attached is integrally formed in a state of being opposed to each other with a predetermined distance. Although not described in detail, the first disk part 41 and the second disk part 42 are equipped with parts necessary for an encoder ring and other torque meters.

Here, when calibrating the torque meter 4, it is necessary to stop the rotation of the motor shaft 22, the shaft 32, and the torque meter 4. Therefore, in the present embodiment, a groove 371 is formed on the outer wall surface of the outer cover 37 of the bearing adapter 3 along the proximal end portion 341 of the flange portion 34 attached to the distal end portion of the shaft 32, and along this groove 371. A plate-like shaft lock member 38 is mounted so as to advance and retract. The shaft locking member 38 has a bifurcated tip, and moves into the groove 371 when the torque meter 4 is calibrated , thereby engaging with the flat surface 341 a at the base end 341 of the flange 34 and the shaft 32. Is completely stopped, and when the motor 2 is driven, the shaft 32 is rotated by exiting from the groove 371.

  As described above, the bearing adapter 3 of the present embodiment applied to the test apparatus 1 as described above is used as a separate body between the motor 2 and the torque meter 4. The shaft 32 is connected to the motor shaft 22 by an input adapter 33 or an oil adapter 35, and the shaft 32 is rotatably supported by a unique bearing portion 361 so that the shaft 32 is a flange portion which is an output side adapter. It connects to the torque meter 4 via 34. Since the casing 21 is tapered and the bottom of the motor 2 side is lower than the bottom of the torque meter 4, and the lubricating oil drain port 313 is formed on the motor 2 side of the bottom. Since the lubricating oil supplied to the inside of the casing 31 of the bearing adapter 3 can be allowed to flow naturally to the oil discharge port 313, the disposal of the lubricating oil can be simplified and the work required for it can be simplified. Further, since the oil discharge port 313 is connected to the discharge port 233 communicated with the casing 21 of the motor 2, the lubricating oil supplied to the inside of the motor 2 is similarly provided at one oil discharge port 313. Can be discarded from.

  Further, the casing 31 in the bearing adapter 3 is inclined so that the tip of the casing 31 is narrowed from the motor 2 side toward the torque meter 4 side as described above, thereby reducing the weight on the torque meter 4 side of the casing 31 and reducing the shaft. The load in the radial direction acting on 32 can be reduced. Further, both ends of the motor shaft 22 are supported by the bearing portion 231 and the like in the motor 2 and the overhang of the shaft 32 toward the torque meter 4 is set to be short so that the unbalance is reduced and the motor shaft 22 is reduced. In addition, it is possible to reduce vibration at the time of high-speed rotation of the shaft 32, and to bend the shaft 32 in the radial direction by a load factor including the torque meter 4 and a load device connected thereto via the specimen adapter 6. Therefore, the measurement accuracy by the torque meter 4 can be improved as compared with the conventional one. Further, although the specimen adapter 6 is necessary as an essential part between the torque meter 4 and the load device, it is possible to prevent other mechanical parts from being present. The accuracy can be improved. Also, the bearing adapter 3 is a separate device from the motor 2, and it is possible to avoid a complicated structure in which a torque meter is built in these components. It is also possible to simplify the manufacture and maintenance of each device.

  Further, thrust oil passages 221 and 321 extending in the longitudinal direction are formed in the motor shaft 22 of the motor 2 and the shaft 32 of the bearing adapter 3, respectively. These thrust oil passages 221 and 321 communicate with each other by the oil adapter 35. Therefore, since the lubricating oil injected from the motor 2 side into the thrust oil passage 221 of the motor shaft 22 can be supplied also to the thrust oil passage 321 of the bearing adapter 3 through the oil adapter 35, the entire test apparatus 1 is provided. The number of locations where the lubricating oil is injected can be reduced, and not only is the waste oil easy, but also simplification of the structure and reduction of the labor required for injecting the lubricating oil can be achieved.

  In addition, this invention is not limited to embodiment mentioned above, For example, about the specific structure of each part, such as making the casing of the bearing adapter 3 into a taper curved shape, it is not restricted to the said embodiment, The meaning of this invention Various modifications can be made without departing from the scope.

The rear perspective view which shows the principal part of the test apparatus to which the bearing adapter which concerns on one Embodiment of this invention is applied. The rear view which shows the test apparatus. FIG. 3 is a schematic cross-sectional view taken along line AA in FIG. 2. FIG. 3 is a schematic cross-sectional view taken along line BB in FIG. 2. FIG. 5 is a schematic cross-sectional view taken along the line CC in FIG. 4. FIG. 3 is a schematic enlarged cross-sectional view particularly showing a peripheral portion of the bearing adapter in FIG. FIG. 3 is a schematic perspective sectional view particularly showing a peripheral portion of the bearing adapter in FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Test apparatus 2 ... Motor 3 ... Bearing adapter 4 ... Torque meter 22 ... Motor shaft 221 ... Oil path (thrust oil path)
222: Oil passage (radial oil passage)
31 ... Casing 32 ... Shaft 33 ... Input side adapter 34 ... Output side adapter (flange)
35 ... Oil adapter 233 ... Drain port 313 ... Drain port 321 ... Oil passage (thrust oil passage)
322 ... Oil passage (radial oil passage)
361 ... Bearing section

Claims (5)

Is applied to a test apparatus for testing the rotation performance of the motor having a drive unit for rotating the motor shaft, a torque meter load device constitutes a load part driven by the motor shaft together with the coupled and the load device, wherein It is a bearing adapter that is attached between the motor and
A shaft that rotates in synchronization with the motor shaft, an input-side adapter that connects the shaft and the motor shaft, an output-side adapter that transmits the rotation of the shaft to the load portion, and the shaft that is rotatably supported A bearing portion, and a shaft that accommodates the shaft, the input side adapter, the output side adapter, and the bearing portion,
The inner surface of at least the bottom portion of the casing that is installed in a state where the axial direction of the shaft is maintained substantially horizontal is inclined or curved so that the motor side is lower than the load portion side, and the A bearing adapter, wherein an oil discharge port for discharging lubricating oil supplied into the casing is formed at a corner of the casing on the motor side. The bearing adapter according to claim 1, wherein the casing has a cross-sectional shape that gradually tapers from the motor side toward the load portion side. The bearing adapter according to claim 1, wherein an oil passage through which lubricating oil is circulated is formed in the shaft, and the oil passage is communicated with an internal space of the casing. When the motor shaft forms an oil passage through which lubricating oil flows along its axis, the motor shaft further includes an oil adapter that communicates the oil passage of the shaft with the oil passage of the motor shaft. 3. The bearing adapter according to 3. The bearing adapter according to any one of claims 1 to 4, wherein the oil discharge port communicates with a lubricant discharge port formed in the motor.

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