JP6799926B2 - Bearing equipment and roller equipment - Google Patents

Description

The present invention relates to a bearing device and a roller device in which the inner ring portion rotates in the circumferential direction with respect to the outer ring portion.

Conventionally, a bearing device provided between a drive shaft fixed to a step of an escalator and a drive roller that rolls a drive rail is known. The drive roller is rotatably supported by the drive shaft via a bearing device (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-240442

However, the bearing device includes an inner ring portion fixed to the drive shaft, an outer ring portion provided radially outside the inner ring portion and fixed to the drive roller, and a ball portion provided between the inner ring portion and the outer ring portion. If the ball part is damaged, the outer ring part moves in the axial direction with respect to the inner ring part, and there is a problem that the drive roller is detached from the drive rail. It was.

The present invention provides a bearing device and a roller device capable of suppressing the occurrence of derailment.

The bearing device according to the present invention includes an inner ring portion, an outer ring portion provided radially outside the inner ring portion, and a ball portion provided between the inner ring portion and the outer ring portion, and the inner ring portion is the outer ring portion. It is a bearing device that rotates in the circumferential direction with respect to the inner ring portion, and further includes a regulating portion that regulates the movement of the outer ring portion in the axial direction with respect to the inner ring portion. It has an inner ring regulation piece fixed to the inner ring portion and an outer ring regulation piece fixed to the outer ring portion including the outer ring radial portion extending in the radial direction, and the inner ring radial portion and the outer ring radial portion have a ball portion. when not corrupted, without facing each other in the axial direction, when the ball portion is crush damaged, face each other in the axial direction.

According to the bearing device according to the present invention, since the outer ring portion is further provided with a regulation portion that regulates the movement of the outer ring portion in the axial direction with respect to the inner ring portion, the outer ring portion moves in the axial direction with respect to the inner ring portion. Is regulated. As a result, it is possible to suppress the occurrence of derailment.

It is a perspective view which shows the step device of the escalator which concerns on Embodiment 1 of this invention. It is a vertical cross-sectional view which shows the bearing device of FIG. It is an enlarged view which shows the main part of the bearing apparatus of FIG. It is a vertical cross-sectional view which shows the state which the ball part of the bearing apparatus of FIG. It is a vertical sectional view which shows the roller apparatus which concerns on Embodiment 2 of this invention.

Embodiment 1.
FIG. 1 is a perspective view showing a step device of an escalator according to a first embodiment of the present invention. In the figure, the step device of the escalator is rotatably supported on the drive shaft 2 via the step 1, the drive shaft 2 fixed to the step 1, the bearing device 3 provided on the drive shaft 2, and the bearing device 3. Drive roller 4 and driven shaft 5 fixed to the rear stage side of the drive shaft 2 in the step 1, bearing device 6 provided on the driven shaft 5, and rotatable to the driven shaft 5 via the bearing device 6. It is equipped with a driven roller 7 supported by the vehicle. The drive roller 4 rolls a drive rail (not shown) when the step 1 circulates. The driven roller 7 rolls a driven rail (not shown) when the step 1 circulates.

FIG. 2 is a vertical cross-sectional view showing the bearing device 3 of FIG. Here, the configuration of the bearing device 3 will be described, but the configuration of the bearing device 6 is the same as the configuration of the bearing device 3. The bearing device 3 includes an inner ring portion 31, an outer ring portion 32 provided radially outside the inner ring portion 31, and a plurality of ball portions 33 provided between the inner ring portion 31 and the outer ring portion 32. The inner ring portion 31 rotates in the circumferential direction with respect to the outer ring portion 32. Further, the bearing device 3 is fixed to the drive shaft 2 and the regulation portion 34 that regulates the movement of the outer ring portion 32 in the axial direction with respect to the inner ring portion 31, and the inner ring portion 31 is axially oriented with respect to the drive shaft 2. It is equipped with a C pin 35 that regulates movement to the outside.

The inner ring portion 31 is formed in a cylindrical shape. The drive shaft 2 is fitted inside the inner ring portion 31. As a result, the inner ring portion 31 is fixed to the drive shaft 2. The C pin 35 is fixed to the outer side in the axial direction with respect to the portion of the drive shaft 2 in which the inner ring portion 31 is in contact. A groove 311 into which the ball portion 33 is inserted is formed on the radial outer surface of the inner ring portion 31.

The outer ring portion 32 is formed in a cylindrical shape. A drive roller 4 is fitted on the outside of the outer ring portion 32. As a result, the outer ring portion 32 is fixed to the drive roller 4. As the outer ring portion 32 rotates in the circumferential direction with respect to the inner ring portion 31, the drive roller 4 rotates in the circumferential direction around the drive shaft 2. A groove 321 into which the ball portion 33 is inserted is formed on the radial inner surface of the outer ring portion 32.

The ball portion 33 can roll with respect to the inner ring portion 31 and the outer ring portion 32 in a state of being inserted into the groove 311 and the groove 321. By inserting the ball portion 33 into the groove 311 and the groove 321, the outer ring portion 32 is restricted from moving in the axial direction with respect to the inner ring portion 31.

The regulation unit 34 has an inner ring regulation piece 341 fixed to the inner ring portion 31 and an outer ring regulation piece 342 fixed to the outer ring portion 32. The inner ring control piece 341 and the outer ring control piece 342 are made of carbon steel. The inner ring regulation piece 341 and the outer ring regulation piece 342 are not limited to carbon steel, and may be iron, carbon, resin, or the like having wear resistance and low friction. Further, each of the inner ring regulation piece 341 and the outer ring regulation piece 342 may be configured to emit a sound when sliding with each other.

FIG. 3 is an enlarged view showing a main part of the bearing device 3 of FIG. The inner ring restricting piece 341 is a pair of inner ring axial portions 343 projecting outward in the axial direction from both end faces in the axial direction of the inner ring portion 31, and a pair of inner rings projecting radially outward from the tip portions of the respective inner ring axial portions 343. It has a radial portion 344. Each inner ring axial portion 343 is formed in a cylindrical shape. Each inner ring radial portion 344 is formed in a ring shape.

The outer ring regulation piece 342 includes a pair of outer ring axial portions 345 projecting outward in the axial direction from both end faces in the axial direction of the outer ring portion 32, and a pair of outer rings projecting radially inward from the tip portions of the respective outer ring axial portions 345. It has a radial portion 346 and the like. Each outer ring axial portion 345 is formed in a cylindrical shape. Each outer ring radial portion 346 is formed in a ring shape.

The outer ring radial direction portion 346 is arranged axially outside the inner ring radial direction portion 344. The tip portion of the inner ring radial direction portion 344 and the tip portion of the outer ring radial direction portion 346 are arranged so as to partially overlap each other when viewed in the axial direction. In other words, the tip of the inner ring radial portion 344 and the tip of the outer ring radial portion 346 face each other in the axial direction. The tip of the inner ring radial portion 344 and the tip of the outer ring radial portion 346 do not have to face each other if the ball portion 33 is not damaged. In this configuration, the tip of the inner ring radial portion 344 and the tip of the outer ring radial portion 346 face each other when the ball portion 33 is damaged and crushed.

The radial dimension L1 of the inner ring portion 31 and the outer ring portion 32 is larger than the dimension L2 between the tip end portion of the inner ring radial direction portion 344 and the outer ring axial direction portion 345. Therefore, when the ball portion 33 is damaged and crushed, the tip portion of the inner ring radial portion 344 abuts in the outer ring axial direction portion 345 in the radial direction, and the outer ring portion 32 moves in the radial direction with respect to the inner ring portion 31. Is regulated.

FIG. 4 is a vertical cross-sectional view showing a state in which the ball portion 33 of the bearing device 3 of FIG. 2 is damaged. When the ball portion 33 is damaged and crushed, the tip portion of the inner ring radial direction portion 344 abuts on the outer ring axial direction portion 345 in the radial direction. In this case, the inner ring radial portion 344 and the outer ring radial portion 346 face each other in the axial direction. By hitting the inner ring radial portion 344 and the outer ring radial portion 346 in the axial direction, the outer ring portion 32 is restricted from moving in the axial direction with respect to the inner ring portion 31. As a result, even when an axial force acts on the outer ring portion 32, the outer ring portion 32 is suppressed from moving in the axial direction with respect to the inner ring portion 31. As a result, derailment of the drive roller 4 from coming off the drive rail is suppressed. Further, in this case, since the tip end portion of the inner ring radial direction portion 344 abuts on the outer ring axial direction portion 345 in the radial direction, the outer ring portion 32 is restricted from moving in the radial direction with respect to the inner ring portion 31. As a result, the drive shaft 2 is restricted from moving downward with respect to the drive roller 4, and when the step 1 overlaps the landing plate, an opening is prevented from being formed between the step 1 and the landing plate in the height direction. Will be done.

As described above, according to the bearing device 3 according to the first embodiment of the present invention, the inner ring portion 31, the outer ring portion 32 provided radially outside the inner ring portion 31, the inner ring portion 31 and the outer ring portion A bearing device 3 having a ball portion 33 provided between the inner ring portion 32 and the inner ring portion 31 rotating in the circumferential direction with respect to the outer ring portion 32, and the outer ring portion 32 axially with respect to the inner ring portion 31. Since the regulation unit 34 for restricting the movement is further provided, the outer ring portion 32 is restricted from moving in the axial direction with respect to the inner ring portion 31. As a result, it is possible to suppress the occurrence of derailment.

Further, since the regulation unit 34 restricts the outer ring portion 32 from moving in the radial direction with respect to the inner ring portion 31, it is possible to prevent the inner ring portion 31 and the outer ring portion 32 from coming into contact with each other in the radial direction. As a result, when the ball portion 33 is damaged and crushed, the sinking of the drive shaft 2 is suppressed, and the sinking of the step 1 can be suppressed. As a result, when the step 1 overlaps with the landing plate, it is possible to suppress the formation of an opening in the height direction between the step 1 and the landing plate.

Further, the regulating portion 34 includes an inner ring restricting piece 341 fixed to the inner ring portion 31 including the inner ring radial portion 344 extending in the radial direction, and an outer ring fixed to the outer ring portion 32 including the outer ring radial portion 346 extending in the radial direction. It has a regulation piece 342, and the outer ring portion 32 is restricted from moving in the axial direction with respect to the inner ring portion 31 by the inner ring radial portion 344 and the outer ring radial portion 346 hitting in the axial direction. Therefore, it is possible to restrict the outer ring portion 32 from moving in the axial direction with respect to the inner ring portion 31.

In the first embodiment, the configuration in which the outer ring radial direction portion 346 is arranged axially outside the inner ring radial direction portion 344 has been described, but the inner ring radial direction portion 344 is more axial than the outer ring radial direction portion 346. The configuration may be arranged outside the direction. Even in this case, it is possible to regulate the movement of the outer ring portion 32 in the axial direction with respect to the inner ring portion 31 by the contact between the inner ring radial direction portion 344 and the outer ring radial direction portion 346 in the axial direction. Further, in the case of this configuration, when the ball portion 33 is damaged and crushed, the tip portion of the outer ring radial direction portion 346 abuts in the inner ring axial direction portion 343 in the radial direction, and the outer ring portion with respect to the inner ring portion 31. The movement of 32 in the radial direction is restricted.

Further, in the first embodiment, the bearing device 3 provided on the drive shaft 2 has been described, but the bearing device 3 provided on the driven shaft 5 may be used.

Further, in the first embodiment, the bearing device 3 provided in the step device of the escalator has been described, but the bearing device 3 provided in the step device of the escalator is not limited to the bearing device 3 provided in the belt conveyor and the roller guide shoe of the elevator. Any bearing device such as a bearing device or a bearing device provided in a roller guide shoe of a garage elevator may be used as long as it is a bearing device that rotatably supports the rollers on a rotating shaft.

Embodiment 2.
FIG. 5 is a vertical sectional view showing a roller device according to a second embodiment of the present invention. The roller device includes a drive shaft 2 which is a rotation shaft, an inner ring portion 31 provided around the drive shaft 2 and fixed to the drive shaft 2, and an outer ring portion 32 provided radially outside the inner ring portion 31. The inner ring is provided with a ball portion 33 provided between the inner ring portion 31 and the outer ring portion 32, and a drive roller 4 which is a roller portion provided around the outer ring portion 32 and fixed to the outer ring portion 32. The portion 31 rotates in the circumferential direction with respect to the outer ring portion 32. Further, the roller device is fixed to the drive shaft 2 and the regulation portion 36 that regulates the movement of the outer ring portion 32 in the axial direction with respect to the inner ring portion 31, and the inner ring portion 31 is axially outside with respect to the drive shaft 2. It is further equipped with a C pin 35 that regulates movement to.

The regulation unit 36 has an inner ring regulation piece 361 fixed to the inner ring portion 31 and an outer ring regulation piece 362 fixed to the drive roller 4. The inner ring control piece 361 and the outer ring control piece 362 are made of carbon steel. The inner ring regulation piece 361 and the outer ring regulation piece 362 are not limited to carbon steel, and may be iron, carbon, resin, or the like having wear resistance and low friction. Further, each of the inner ring regulation piece 361 and the outer ring regulation piece 362 may be configured to emit a sound when sliding with each other.

The inner ring restricting piece 361 includes a pair of inner ring axial portions 363 projecting outward in the axial direction from both end faces in the axial direction of the inner ring portion 31, and a pair of inner rings projecting radially outward from the tip portions of the respective inner ring axial portions 363. It has a radial portion 364 and the like. Each inner ring axial portion 363 is formed in a cylindrical shape. Each inner ring radial portion 364 is formed in a ring shape.

The outer ring restricting piece 362 includes a pair of outer ring axial portions 365 projecting outward in the axial direction from both end faces in the axial direction of the drive roller 4, and a pair of outer rings projecting radially inward from the tip portions of the respective outer ring axial portions 365. It has a radial portion 366. Each outer ring axial portion 365 is formed in a cylindrical shape. Each outer ring radial portion 366 is formed in a ring shape.

The outer ring radial direction portion 366 is arranged axially outside the inner ring radial direction portion 364. The tip portion of the inner ring radial direction portion 364 and the tip portion of the outer ring radial direction portion 366 are arranged so as to partially overlap each other when viewed in the axial direction. In other words, the tip of the inner ring radial portion 364 and the tip of the outer ring radial portion 366 face each other in the axial direction. The tip of the inner ring radial portion 364 and the tip of the outer ring radial portion 366 do not have to face each other if the ball portion 33 is not damaged. In this configuration, the tip of the inner ring radial portion 364 and the tip of the outer ring radial portion 366 face each other when the ball portion 33 is damaged and crushed.

Similar to the first embodiment, the radial dimension of the inner ring portion 31 and the outer ring portion 32 is larger than the dimension between the tip end portion of the inner ring radial direction portion 364 and the outer ring axial direction portion 365. Therefore, when the ball portion 33 is damaged and crushed, the tip portion of the inner ring radial portion 364 abuts in the outer ring axial direction portion 365 in the radial direction, and the outer ring portion 32 moves in the radial direction with respect to the inner ring portion 31. Is regulated.

When the ball portion 33 is damaged and crushed, the tip portion of the inner ring radial direction portion 364 abuts on the outer ring axial direction portion 365 in the radial direction. In this case, the inner ring radial portion 364 and the outer ring radial portion 366 face each other in the axial direction. By hitting the inner ring radial portion 364 and the outer ring radial portion 366 in the axial direction, the outer ring portion 32 is restricted from moving in the axial direction with respect to the inner ring portion 31. As a result, even when an axial force acts on the outer ring portion 32, the outer ring portion 32 is suppressed from moving in the axial direction with respect to the inner ring portion 31. As a result, derailment of the drive roller 4 from coming off the drive rail is suppressed. Further, in this case, since the tip end portion of the inner ring radial direction portion 364 abuts on the outer ring axial direction portion 365 in the radial direction, the outer ring portion 32 is restricted from moving in the radial direction with respect to the inner ring portion 31. As a result, the drive shaft 2 is restricted from moving downward with respect to the drive roller 4, and when the step 1 overlaps the landing plate, an opening is prevented from being formed between the step 1 and the landing plate in the height direction. Will be done. Other configurations are the same as those in the first embodiment.

As described above, according to the roller device according to the second embodiment of the present invention, the drive shaft 2, the inner ring portion 31 provided around the drive shaft 2 and fixed to the drive shaft 2, and the inner ring portion. The outer ring portion 32 provided radially outside the 31, the ball portion 33 provided between the inner ring portion 31 and the outer ring portion 32, and the ball portion 33 provided around the outer ring portion 32 and fixed to the outer ring portion 32. A roller device that includes a drive roller 4 and the inner ring portion 31 rotates in the circumferential direction with respect to the outer ring portion 32, and is a regulation unit that regulates the movement of the outer ring portion 32 in the axial direction with respect to the inner ring portion 31. Since the 36 is further provided, the outer ring portion 32 is restricted from moving in the axial direction with respect to the inner ring portion 31. As a result, it is possible to suppress the occurrence of derailment.

Further, since the regulation unit 36 restricts the outer ring portion 32 from moving in the radial direction with respect to the inner ring portion 31, it is possible to prevent the inner ring portion 31 and the outer ring portion 32 from coming into contact with each other in the radial direction. As a result, when the ball portion 33 is damaged and crushed, the sinking of the drive shaft 2 is suppressed, and the sinking of the step 1 can be suppressed. As a result, when the step 1 is adjacent to the landing plate, it is possible to suppress the formation of an opening in the height direction between the step 1 and the landing plate.

Further, the regulating portion 36 includes an inner ring restricting piece 361 including an inner ring radial portion 363 extending in the radial direction and fixed to the inner ring portion 31, and an outer ring including an outer ring radial portion 366 extending in the radial direction and fixed to the drive roller 4. It has a regulating piece 362, and the outer ring portion 32 is restricted from moving in the axial direction with respect to the inner ring portion 31 by the inner ring radial portion 363 and the outer ring radial portion 366 coming into contact with each other in the axial direction. Therefore, it is possible to restrict the outer ring portion 32 from moving in the axial direction with respect to the inner ring portion 31.

In the second embodiment, the configuration in which the regulation unit 36 has the inner ring regulation piece 361 provided on the inner ring portion 31 has been described, but the regulation unit 36 has the inner ring regulation piece 361 provided on the drive shaft 2. It may be a configuration.

Further, in the second embodiment, the configuration in which the regulation unit 36 has the outer ring regulation piece 362 provided on the drive roller 4 has been described, but the regulation unit 36 has the outer ring regulation piece 362 provided on the outer ring portion 32. It may be a configuration.

Further, in the second embodiment, the configuration in which the outer ring radial direction portion 366 is arranged axially outside the inner ring radial direction portion 364 has been described, but the inner ring radial direction portion 364 is more axial than the outer ring radial direction portion 366. The configuration may be arranged outside the direction. Even in this case, it is possible to regulate the movement of the outer ring portion 32 in the axial direction with respect to the inner ring portion 31 by the contact between the inner ring radial direction portion 364 and the outer ring radial direction portion 366 in the axial direction. Further, in the case of this configuration, when the ball portion 33 is damaged and crushed, the tip portion of the outer ring radial direction portion 366 abuts in the inner ring axial direction portion 363 in the radial direction, and the outer ring portion with respect to the inner ring portion 31. The movement of 32 in the radial direction is restricted.

Further, in the second embodiment, the configuration of the roller device including the drive shaft 2, the inner ring portion 31, the outer ring portion 32, the ball portion 33, the drive roller 4 and the regulation portion 36 has been described, but the driven shaft which is a rotating shaft 5. The configuration may be a roller device including an inner ring portion 31, an outer ring portion 32, a ball portion 33, a driven roller 7 which is a roller portion, and a regulation portion 36. In this case, the inner ring portion 31 is fixed to the driven shaft 5, and the outer ring portion 32 is fixed to the driven roller 7.

Further, in the second embodiment, the roller device included in the step device of the escalator has been described, but the roller device is not limited to the roller device provided in the step device of the escalator, but the roller device included in the belt conveyor and the roller device provided in the roller guide shoe of the elevator. Alternatively, any roller device such as a roller device provided in a roller guide shoe of a garage elevator may be used as long as it is a roller device that rotatably supports the rollers on a rotating shaft.

1 step, 2 drive shaft, 3 bearing device, 4 drive roller, 5 driven shaft, 6 bearing device, 7 driven roller, 31 inner ring part, 32 outer ring part, 33 ball part, 34 regulation part, 35 C pin, 36 regulation part 3,11 groove, 321 groove, 341 inner ring regulation piece, 342 outer ring regulation piece, 343 inner ring axial part, 344 inner ring axial part, 345 outer ring axial direction part, 346 outer ring radial part, 361 inner ring regulation piece, 362 outer ring regulation piece , 363 Inner ring axial part, 364 Inner ring radial part, 365 Outer ring axial part, 366 Outer ring radial part.

Claims (6)

An inner ring portion, an outer ring portion provided radially outside the inner ring portion, and a ball portion provided between the inner ring portion and the outer ring portion are provided, and the inner ring portion is provided with respect to the outer ring portion. A bearing device that rotates in the circumferential direction.
Further provided with a regulating portion that regulates the movement of the outer ring portion in the axial direction with respect to the inner ring portion.
The restricting portion includes an inner ring restricting piece including an inner ring radial portion extending in the radial direction and fixed to the inner ring portion, and an outer ring restricting piece including an outer ring radial portion extending in the radial direction and fixed to the outer ring portion. And
The inner ring radial portion and the outer ring radial portion do not face each other in the axial direction when the ball portion is not damaged, and face each other in the axial direction when the ball portion is damaged and crushed. Bearing device. The bearing device according to claim 1, wherein the regulating portion regulates the movement of the outer ring portion in the radial direction with respect to the inner ring portion. The bearing device according to claim 1 or 2 , wherein the outer ring portion is restricted from moving in the axial direction with respect to the inner ring portion when the inner ring radial portion and the outer ring radial portion hit in the axial direction. A rotating shaft, an inner ring portion provided around the rotating shaft and fixed to the rotating shaft, an outer ring portion provided radially outside the inner ring portion, and the inner ring portion and the outer ring portion. A roller device including a ball portion provided between the outer ring portions and a roller portion provided around the outer ring portion and fixed to the outer ring portion, and the inner ring portion rotates in the circumferential direction with respect to the outer ring portion. There,
Further provided with a regulating portion that regulates the movement of the outer ring portion in the axial direction with respect to the inner ring portion.
The restricting portion includes an inner ring restricting piece including an inner ring radial portion extending in the radial direction and fixed to the rotating shaft or the inner ring portion, and an outer ring radial portion extending in the radial direction and is fixed to the outer ring portion or the roller portion. With the outer ring regulation piece,
The inner ring radial portion and the outer ring radial portion do not face each other in the axial direction when the ball portion is not damaged, and face each other in the axial direction when the ball portion is damaged and crushed. Roller device. The roller device according to claim 4 , wherein the regulating unit restricts the outer ring portion from moving in the radial direction with respect to the inner ring portion. The roller device according to claim 4 or 5 , wherein the outer ring portion is restricted from moving in the axial direction with respect to the inner ring portion when the inner ring radial portion and the outer ring radial portion hit in the axial direction.

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