JP6333228B2 - Backlash measuring device - Google Patents

Description

  The present invention relates to a backlash measuring device for measuring backlash of a gear device.

  Conventionally, a first gear holding part that holds the first gear, a second gear holding part that holds the second gear, a restriction part that restricts rotation of the first gear held by the first gear holding part, A backlash measurement device is known that includes a dial gauge that measures the amount of displacement in the rotational direction of the second gear while the rotation of the first gear is restricted (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 3-11164

  However, when measuring backlash in a gear device including a base, a first gear rotatably provided on the base, and a second gear rotatably provided on the base and meshing with the first gear, After removing the first gear and the second gear from the base, the first gear must be held by the first gear holding portion and the second gear must be held by the second gear holding portion. There was a problem that the efficiency of.

  The present invention provides a backlash measuring device capable of improving the efficiency of backlash measurement work.

  A backlash measuring device according to the present invention includes a base, a first gear rotatably provided on the base, and a backlash in a gear device including a second gear rotatably provided on the base and meshing with the first gear. A fixed portion fixed to the base, a gear restricting portion provided on the fixed portion for restricting the rotation of the first gear, and provided on the fixed portion. A dial gauge for measuring the amount of displacement in the rotational direction.

  According to the backlash measurement device of the present invention, the gear gauge restricts the first gear provided on the base, and the dial gauge measures the displacement in the rotational direction of the second gear meshing with the first gear. Therefore, the backlash of the gear device can be measured without removing the first gear and the second gear from the base. Thereby, the efficiency of the backlash measurement work can be improved.

It is a side view which shows the gear apparatus with which the backlash measuring apparatus which concerns on Embodiment 1 of this invention is attached. It is a top view which shows the gear apparatus of FIG. It is a side view which shows the backlash measuring apparatus attached to the gear apparatus of FIG. It is a top view which shows the backlash measuring apparatus of FIG. It is an enlarged view which shows the gear control part of FIG. It is a bottom view which shows the gear control main body of FIG. It is a figure which shows the modification of the gear control main body of FIG.

Embodiment 1 FIG.
1 is a side view showing a gear device to which a backlash measuring device according to Embodiment 1 of the present invention is attached, and FIG. 2 is a plan view showing the gear device of FIG. In this example, the gear device 1 is a helical gear device. The gear device 1 is provided on the base 11, a pair of bearings 12 provided on the base 11, a first gear 13 provided rotatably on the base 11 via the bearing 12, and the base 11. A pair of bearings 14 and a second gear 15 rotatably provided on the base 11 via the bearings 14.

  The base 11, the first gear 13, and the second gear 15 are made of a magnetic material.

  The first gear 13 includes a columnar rotary body 131, a pair of rotary shafts 132 that are provided at both axial ends of the rotary body 131 and are rotatably supported by the respective bearings 12, and an outer peripheral surface of the rotary body 131. And a plurality of tooth portions 133 formed on the surface. The tooth portion 133 is formed on the outer peripheral surface of the rotating body 131 by forming a plurality of grooves 134 on the outer peripheral surface of the rotating body 131. The groove 134 is formed so as to be inclined with respect to the axis when the rotator 131 is viewed in a direction perpendicular to the axis. Therefore, the tooth part 133 is formed so as to be inclined with respect to the axis when the rotating body 131 is viewed in a direction perpendicular to the axis.

  The second gear 15 includes a columnar rotating body 151, a pair of rotating shafts 152 that are provided at both axial ends of the rotating body 151 and are rotatably supported by the respective bearings 14, and an outer peripheral surface of the rotating body 151. And a plurality of tooth portions 153 formed on the surface. The tooth portion 153 is formed on the outer peripheral surface of the rotating body 151 by forming a plurality of grooves 154 on the outer peripheral surface of the rotating body 151. The groove 154 is formed so as to be inclined with respect to the axis when the rotating body 151 is viewed in a direction perpendicular to the axis. Therefore, the tooth part 154 is formed so as to be inclined with respect to the axis when the rotating body 151 is viewed in a direction perpendicular to the axis.

  A part of the plurality of teeth 133 is inserted into the groove 154. A part of the plurality of tooth portions 153 is inserted into the groove 134. Accordingly, the rotational force of one of the first gear 13 and the second gear 15 is transmitted to the other of the first gear 13 and the second gear 15. Thus, when one of the first gear 13 and the second gear 15 rotates, the other of the first gear 13 and the second gear 15 also rotates.

  3 is a side view showing the backlash measuring device attached to the gear device 1 of FIG. 1, and FIG. 4 is a plan view showing the backlash measuring device of FIG. 3 and 4 also show the gear device 1. The backlash measuring device 2 is provided on the fixed portion 21 fixed to the base 11, the gear restricting portion 22 that is provided on the fixed portion 21 and restricts the rotation of the first gear 13, and the fixed portion 21. A dial gauge 23 for measuring a displacement amount in the rotation direction of the gear 15 is provided.

  The fixed portion 21 includes a pair of magnet bases 211 fixed to the base 11 with the first gear 13 interposed therebetween, and leg portions 212 provided over the respective magnet bases 211 so as to pass above the first gear 13. And have.

  Each magnet base 211 includes a housing 213, a magnet (not shown) provided inside the housing 213, and a handle 214 provided on the housing 213 and displacing the magnet. The magnet is displaced between a fixed position where an attractive force due to a magnetic force is generated with the base 11 and a release position where the attractive force due to the magnetic force with the base 11 is released. When the magnet base 211 is placed on the base 11 and the position of the magnet is a fixed position, the magnet base 211 is attracted by the magnetic force generated between the magnet and the base 11. , Fixed to the base 11. On the other hand, even when the magnet base 211 is placed on the base 11, when the position of the magnet is the release position, the magnet base 211 is attracted by the magnetic force between the magnet and the base 11. Since the force is released, it is not fixed to the base 11. In this case, the magnet base 211 can be separated from the base 11 with a small force.

  The leg portion 212 has a pair of leg portion main bodies 215 and a connecting portion 216 provided over the upper end portion of each leg portion main body 215. The pair of leg main bodies 215 stands on the magnet base so as to sandwich the first gear 13. In this example, the configuration of the leg 212 having the pair of leg main bodies 215 will be described, but the configuration of the legs having three or more leg main bodies 215 may be used. In this case, the magnet base 211 is arranged corresponding to the number of leg main bodies 215. For example, in the case of a leg portion having four leg main bodies 215, the two leg main bodies 215 are erected on the magnet base 211 so as to sandwich the first gear 13. Thereby, the fixing | fixed part 21 can be fixed to the base 11 more reliably.

  The gear restricting portion 22 includes a moving rod 221 provided on the leg portion 212, a gear restricting body 222 provided on the moving rod 221, and a handle 223 that moves the moving rod 221.

  FIG. 5 is an enlarged view showing the gear restricting portion 22 of FIG. A through hole extending in the vertical direction is formed in the upper portion of the leg portion 212. A thread groove is formed on the inner peripheral surface of the through hole formed in the leg portion 212. The moving rod 221 is inserted into a through hole formed in the leg portion 212. A thread groove is formed on the outer peripheral surface of the moving rod 221. As the moving rod 221 rotates, the moving rod 221 moves in the vertical direction with respect to the leg portion 212. The handle 223 is provided at the upper end portion of the moving rod 221. As the handle 223 rotates, the moving rod 221 rotates. The handle 223 is operated by an operator.

  The gear restriction main body 222 is provided at the lower end of the moving rod 221. Therefore, when the moving rod 221 moves in the vertical direction, the gear restriction main body 222 also moves in the vertical direction. As the gear restricting body 222 moves in the vertical direction, the dimension between the gear restricting body 222 in the radial direction and the rotating shaft 132 of the first gear 13 changes.

  6 is a bottom view showing the gear regulating main body 222 of FIG. A groove 224 into which the tooth portion 133 of the first gear 13 is inserted is formed in the gear restriction main body 222. By the tooth portion 133 being inserted into the groove 224, the rotation of the first gear 13 is more reliably regulated. In FIG. 6, the gear restriction main body 222 formed with one groove 224 is shown, but the gear restriction main body 222 formed with a plurality of grooves 224 formed in parallel may be used. As shown in FIG. 7, the gear restriction main body 222 may be formed with a plurality of grooves 224 having different inclination angles corresponding to the formation of the tooth portion 133 of the first gear 13. In the gear restriction main body 222 shown in FIG. 7, the directions of the tooth portions 133 of the first gear 13 are symmetrical.

  The gear restriction main body 222 is composed of a magnet. Therefore, when the gear restriction main body 222 comes into contact with the first gear 13, the gear restriction main body 222 is fixed to the first gear 13 by a magnetic force. In this example, the gear restriction main body 222 is configured to contact only the outer peripheral surface of the first gear 13, but the gear restriction main body 222 is not limited to the outer peripheral surface of the first gear 13, and further, the first gear The structure which contacts a part of 13 side surfaces may be sufficient. Thereby, since the area which contacts the 1st gearwheel 13 in the gear control main body 222 increases, the gear control main body 222 is more strongly fixed to the first gear 13 by the magnetic force.

  In this example, the configuration in which the gear restriction main body 222 is in contact with the first gear 13 will be described. However, the gear restriction portion 22 has a cushioning material such as felt provided between the gear restriction main body 222 and the first gear 13. It may be a configuration. Thereby, the damage of the 1st gearwheel 13 by the gear control main body 222 contacting the 1st gearwheel 13 can be prevented.

  Next, a procedure for measuring the backlash of the gear device 1 using the backlash measuring device 2 will be described. First, a pair of magnet bases 211 are placed on the base 11 so as to sandwich the first gear 13, and the handle 214 is operated to displace the magnets of the magnet base from the release position to the fixed position. Thereby, the fixing | fixed part 21 is fixed to the base 11 (fixing process).

  Thereafter, by operating the handle 223, the gear restricting portion 22 is moved in the vertical direction, and the tooth portion 133 of the first gear 13 is inserted into the groove 224. Thereby, rotation of the 1st gearwheel 13 is controlled (rotation control process).

  Thereafter, while the second gear 15 is rotated, the displacement amount in the rotation direction of the second gear 15 is measured using the dial gauge 23. Thereby, the backlash in the gear apparatus 1 is measured (backlash measurement process). Thus, the measurement of the backlash of the gear device 1 using the backlash measuring device 2 is completed.

  As described above, according to the backlash measuring device 2 according to the first embodiment of the present invention, the fixed portion 21 fixed to the base 11 and the fixed portion 21 are provided, and the first gear 13 is rotated. Since it includes a gear restricting portion 22 that restricts and a dial gauge 23 that is provided in the fixed portion 21 and measures the amount of displacement in the rotational direction of the second gear 15, the first gear 13 and the second gear 15 are used as the basis. The backlash can be measured without removing it from the table 11. Thereby, the efficiency of the backlash measurement work can be improved. Further, since the gear restricting portion 22 restricts the rotation of the first gear 13, it is possible to measure the backlash more accurately than when the operator restricts the rotation of the first gear 13. The operator can perform backlash measurement by himself. Since the gear restricting portion 22 reliably restricts the rotation of the first gear 13, even a backlash having a size within 10/100 mm can be measured more accurately.

  Moreover, since the fixing | fixed part 21 has the magnet base 211 fixed using a magnetic force with respect to the base 11 comprised from the magnetic body, the fixing | fixed part 21 is easily fixed with respect to the base 11. be able to.

  In addition, the magnet base 211 is a magnet that is displaced between a fixed position where an attractive force due to magnetic force is generated between the base 11 and a release position where the attractive force due to magnetic force between the base 11 is released, And a handle 214 for displacing the magnet. By displacing the magnet using the handle 214, it is easier than the case where the fixing portion 21 is attached to and detached from the base 11 using a screw or the like. The fixing part 21 can be attached to and detached from the base 11.

  Moreover, since the dimension between the gear control part 22 about the radial direction and the rotating shaft 132 of the 1st gearwheel 13 can change the gear control part 22, the dimension of the radial direction of the 1st gearwheel 13 differs. The backlash can be measured for the plurality of gear devices by using the backlash measuring device 2.

  Further, since the gear restricting portion 22 is formed with a groove 224 into which the tooth portion 133 formed on the first gear 13 is inserted, the gear restricting portion 22 more reliably restricts the rotation of the first gear 13. can do.

  Although the gear device is described as the helical gear device in the first embodiment, the gear device is not limited to the helical gear device, and may be another gear device.

  In the first embodiment, the base 11, the first gear 13 and the second gear 15 are described as being made of a magnetic material. However, the base 11, the first gear 13 and the second gear 15 are You may comprise from a nonmagnetic material. In this case, the fixing portion 21 does not have the magnet base 211 and is fixed to the base 11 with a bolt or the like.

  DESCRIPTION OF SYMBOLS 1 Gear apparatus, 2 Backlash measuring apparatus, 11 Base, 12 Bearing, 13 1st gear, 14 Bearing, 15 2nd gear, 21 Fixing part, 22 Gear control part, 23 Dial gauge, 131 Rotating body, 132 Rotating shaft 133 tooth part, 134 groove, 151 rotating body, 152 rotating shaft, 153 tooth part, 154 groove, 211 magnet base, 212 leg part, 213 housing, 214 handle, 215 leg part main body, 216 connecting part, 221 moving rod 222, gear regulating body, 223 handle, 244 groove.

Claims (5)

A backlash measuring device for measuring backlash in a gear device including a base, a first gear rotatably provided on the base, and a second gear rotatably provided on the base and meshing with the first gear Because
A fixing portion fixed to the base;
A gear restricting portion that is provided in the fixing portion and restricts the rotation of the first gear;
A backlash measuring device, comprising: a dial gauge that is provided in the fixed portion and measures a displacement amount in the rotation direction of the second gear.   The backlash measurement device according to claim 1, wherein the fixing portion includes a magnet base that is fixed to the base made of a magnetic material using a magnetic force.   The magnet base includes a magnet that is displaced between a fixed position where a magnetic attractive force is generated between the base and a release position where the magnetic attractive force is released between the base and the magnet. The backlash measuring device according to claim 2, further comprising a handle for displacing the backlash.   The said gear control part can change the dimension between the said gear control part about the radial direction and the rotating shaft of a said 1st gearwheel, The change as described in any one of Claim 1- Claim 3 which can change. Backlash measuring device.   The backlash measuring device according to any one of claims 1 to 4, wherein a groove into which a tooth portion formed on the first gear is inserted is formed in the gear restricting portion.

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