JP2007040787A - Device and method for measuring engagement transmission error - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the number of rotations capable of continuous measurement while maintaining a device in compact size, when measuring transmission errors, while imparting loading torque with a loading weight and while making the transmission gear rotate. <P>SOLUTION: The engagement transmission error is measured as follows: in a state with the loading torque (engaging torque) imparted to the transmission gear 14 by suspending the loading weight 38, the driving motor 28 drives the first rotational shaft 20 for making engaged rotation, the rotational angles of the first rotational shaft 20 and the second rotational shaft 22 are measured by the rotary encoders 24 and 26. By the rotation of the first fixed pulley 30, accompanied by the rotation of the second rotation shaft 22, even if the connection wire 34 is wound up or wound back to or from the first fixed pulley 30, the loading weight 38 will be kept at substantially a fixed constant height, because the second fixed pulley 32 rotates, synchronizing to the first fixed pulley 30 by the motor 40 for synchronization. The engagement transmission error can be measured, while making the first rotational shaft 20 rotate many times, while keeping the loading weight 38 at substantially a fixed height. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a measurement device and a measurement method for a meshing transmission error, and more particularly to a technique for greatly increasing the number of rotations capable of continuously measuring a meshing transmission error while maintaining a compact device when load torque is applied by a load weight. Is.

  In a state where a predetermined load torque is applied to the first rotating shaft and the second rotating shaft connected via a gear device having a plurality of gears meshing with each other, the first rotating shaft is rotationally driven to engage the gear device. There is known a device for measuring a meshing transmission error of a gear device by detecting a rotation angle of each of a first rotating shaft and a second rotating shaft by a rotary encoder. The apparatus described in Patent Document 1 is an example, and the transmission torque is measured by rotating the first rotating shaft with the driving electric motor while applying load torque to the second rotating shaft with the load electric motor. In order to eliminate the influence on the measured value of the rotational fluctuation caused by the load electric motor for applying the load torque, a fluid coupling and an inertial body are provided.

  On the other hand, when a fluid coupling or an inertial body is provided in this way, the load torque varies as a contradiction. Therefore, it has been proposed to apply the load torque by the gravity of the load weight. The apparatus described in Patent Document 2 is an example, and a load weight is applied to a rotating body integrally provided on the first rotating shaft and the second rotating shaft to apply a load torque. Thus, a constant load torque can be stably applied.

The "meshing transmission error" is a tooth surface when the first rotating shaft and the second rotating shaft connected via a gear device such as a pair of gears meshing with each other are relatively rotated according to a gear ratio or the like. This is a shift in the rotation angle caused by the shape error and the deflection of the teeth, and it differs depending on the teeth engaged with each other and also changes depending on the load torque.
JP-A-6-74868 JP-A-7-120353

  However, when a load torque is applied by suspending the load weight in this way, the load weight is raised or lowered with the rotation of the first rotation shaft or the second rotation shaft. There was a problem that the transmission error of meshing could not be measured continuously. That is, for example, in the case of a gear device composed of a pair of gears with 50 and 53 teeth, there are 50 × 53 = 2659 meshing transmission error patterns per rotation, and in order to measure all the meshing transmission error patterns. However, in order to perform continuous measurement without changing the load weight, the apparatus becomes very large, which is substantially impossible. In particular, in order to apply a large load torque, it is necessary to increase the diameter of the rotating body that suspends the load weight, and the vertical movement of the load weight per rotation is further increased, resulting in a larger apparatus. The number of rotations that can be continuously measured is reduced.

  The present invention has been made against the background of the above circumstances, and the object of the present invention is to make the device compact when measuring a transmission error by rotating a gear device while applying a load torque with a load weight. The purpose is to greatly increase the number of rotations that can be continuously measured while maintaining the same.

  In order to achieve such an object, the first invention provides a first load shaft applied with a predetermined load torque to a first rotary shaft and a second rotary shaft connected via a gear device having a plurality of gears meshing with each other. A device that rotates and rotates the one rotation shaft to mesh and rotate the gear device, and detects a rotation transmission angle of the first rotation shaft and the second rotation shaft by a rotary encoder to measure a transmission error of the gear device. And (a) an electric motor for driving to rotationally drive the first rotating shaft, (b) a pair of first constant pulley and second constant pulley, and the first constant pulley and second constant pulley. A connecting tool that is connected to both of them and is wound around one of them by a predetermined length; and a movable pulley that is hooked to the connecting tool so as to be relatively movable, and the first constant pulley is the second rotating shaft. Mechanically rotate as the (C) a load weight which is attached to the moving pulley and applies the load torque to the second rotating shaft via the coupling tool and the first constant pulley by gravity, and (d) Even if the connecting member is wound around the first fixed pulley by the rotation of the first constant pulley accompanying the rotation of the second rotating shaft, the vertical movement of the movable pulley is predetermined. So that the coupling tool is unwound from the second fixed pulley or moved to the second constant pulley by rotating the second constant pulley in synchronization with the rotation of the first constant pulley. And a synchronous electric motor for winding.

  According to a second aspect of the present invention, there is provided the mesh transmission error measuring device according to the first aspect, wherein: (a) the pulley row includes the first pulley row, the second constant pulley, the coupling device, and the first pulley row having a moving pulley; (B) Torques in the reverse rotation direction act on the second rotating shaft by load weights respectively attached to the moving pulleys of the first pulley row and the second pulley row. The load torque according to the difference in weight between the two load weights is applied.

  According to a third aspect of the present invention, the first rotary shaft is rotationally driven in a state where a predetermined load torque is applied to the first rotary shaft and the second rotary shaft connected via a gear device having a plurality of gears meshing with each other. A method of measuring the meshing transmission error of the gear device by rotating the gear device in mesh and detecting the rotation angles of the first rotating shaft and the second rotating shaft with a rotary encoder, respectively, Relative to the first fixed pulley and the second fixed pulley, a connecting tool connected to both the first fixed pulley and the second fixed pulley, and wound around a predetermined length around one of the first fixed pulley and the second fixed pulley. A movable pulley that is movably hooked, the first fixed pulley having a pulley train that is mechanically rotated in accordance with the rotation of the second rotation shaft, and (b) a load on the movable pulley. A weight is attached and the weight of the load weight is While applying the load torque to the second rotating shaft, the first rotating shaft is rotationally driven to mesh and rotate the gear device, and (c) the first rotating shaft rotates. In order that the vertical movement of the movable pulley is maintained within a predetermined range even when the coupling tool is wound around the first fixed pulley or unwound from the first fixed pulley by rotation of the fixed pulley. The second fixed pulley is driven to rotate in synchronization with the rotation of the first fixed pulley, so that the connecting tool is unwound from the second fixed pulley or wound around the second fixed pulley.

  According to a fourth aspect of the present invention, in the method for measuring a meshing transmission error according to the third aspect, (a) the pulley train includes a first pulley train having the first constant pulley, the second constant pulley, a connector, and a moving pulley, and (B) Torques in the reverse rotation direction act on the second rotating shaft by load weights respectively attached to the moving pulleys of the first pulley row and the second pulley row. The load torque according to the difference in weight between the two load weights is applied.

  In the meshing transmission error measuring device according to the first aspect of the present invention, a pulley row having a first constant pulley, a second constant pulley, a connector, and a moving pulley is provided, and a second rotating shaft is provided by a load weight attached to the moving pulley. Since the load torque is applied to the load shaft, a constant load torque determined by the weight of the load weight can be stably applied, and the first rotating shaft is driven to rotate by the drive motor. Therefore, the meshing transmission error can be measured with high accuracy.

  Further, even if the connecting tool is wound around the first fixed pulley by the rotation of the first constant pulley accompanying the rotation of the second rotating shaft, the vertical movement of the movable pulley is within a predetermined range. The second constant pulley is driven to rotate in synchronization with the rotation of the first constant pulley by the electric motor for synchronization so that the first and second weight pulleys are held at a predetermined height position. It is possible to continuously measure the meshing transmission error by rotating the rotating shaft many times. By appropriately setting the length dimension of the coupler and winding it around the first fixed pulley or the second fixed pulley, for example, a gear All the meshing transmission error patterns of the device can be continuously measured, and such a device can be configured compactly.

  Here, it is possible to intermittently measure the meshing transmission error in a stationary state while intermittently rotating the first rotating shaft by a predetermined rotation angle (this is also a kind of continuous measurement). Continuous measurement is also possible. When measuring with continuous rotation, it is not possible to completely prevent the vertical movement of the moving pulley and the load weight. Therefore, strictly speaking, the load torque fluctuates due to their inertia, but for example, 1 rpm or less, or about 2-3 rpm If it is rotationally driven at the following very slow rotational speed, it is possible to prevent the influence of inertia due to the vertical movement of the moving pulley or the load weight from occurring.

  In addition, since the second constant pulley is rotationally driven by the synchronous electric motor, the rotation speed of the second constant pulley can be easily controlled by a control device having a microcomputer or the like. Compared to the case where the second constant pulley is rotationally driven through a speed change mechanism or the like using an electric motor as a power source, the second constant pulley is used even when measuring the meshing transmission error of various gear devices having different gear ratios. It can be easily rotated synchronously with respect to one fixed pulley.

  In the second aspect of the invention, the second rotating shaft has a first pulley row and a second pulley row, and a load torque corresponding to a difference in weight of load weights respectively attached to the movable pulleys is applied to the second rotating shaft. Therefore, it is possible to apply load torque in the opposite direction (reverse rotation direction) simply by changing the load weight, for example, in the drive state and the driven state, or in the forward rotation drive and the reverse rotation drive, etc. It is possible to easily measure the meshing transmission error due to the power transmission with which the opposite tooth surface contacts. Further, since the load torque according to the difference in weight between the pair of load weights is applied in this way, it is possible to apply a minute load torque with high accuracy and further improve the measurement accuracy of the meshing transmission error. In addition, it is possible to substantially measure the meshing transmission error at zero load by applying a load torque so as to cancel the rotational resistance of each part such as sliding resistance.

  In the method for measuring the meshing transmission error of the third and fourth inventions, substantially the same effects as the first and second inventions can be obtained.

  Since the present invention analyzes the meshing state of the teeth, for example, the meshing transmission error may be measured by meshing rotation by one pitch of the gear, and it is not always necessary to perform one rotation, but it is necessary to perform one rotation. Thus, it is possible to analyze the meshing transmission error of all the meshing teeth. Further, when the number of teeth of the pair of gears meshing with each other is different, the meshing tooth meshing with each other changes every rotation, so that the meshing transmission error pattern for each rotation is different. In the case of measuring all, for example, the meshing transmission error may be measured by rotating by the number of rotations obtained by multiplying the number of teeth of the pair of gears.

  In the case where all the meshing transmission error patterns are continuously measured, the coupler is configured to rotate the first rotating shaft by the number of rotations necessary for measuring all the meshing transmission error patterns. The first constant pulley is configured to have a length dimension that allows the first constant pulley to rotate along with the rotation of the second rotation shaft, and may be wound around the first constant pulley or the second constant pulley in advance.

  The rotational directions of the first rotating shaft and the second rotating shaft at the time of measuring the meshing transmission error are determined as appropriate, and even when the coupling tool is unwound from the second fixed pulley and wound around the first fixed pulley, The case where it rewinds from the 1 fixed pulley and is wound up by the 2nd fixed pulley may be sufficient.

  In the synchronous electric motor, for example, it is desirable to rotationally drive the second constant pulley so that the moving pulley is held at a substantially constant height position, but the moving pulley is raised or lowered within a predetermined range allowed by the apparatus. You may be allowed to.

  The synchronizing electric motor rotates the second constant pulley in synchronization with the rotation of the first constant pulley, but it is not always necessary to detect and control the rotation of the first constant pulley. It is possible to control based on various physical quantities having a certain correspondence relationship with the rotation of the first fixed pulley, such as the rotation of the first rotating shaft or the driving signal of the driving electric motor.

  In this synchronous electric motor, if the diameters of the first constant pulley and the second constant pulley are the same, the second constant pulley may be rotated at the same speed as the first constant pulley. Are different, the second constant pulley is configured to rotate at a predetermined rotational speed determined according to the difference in diameter.

  The gear device for measuring the meshing transmission error may be a pair of gears that are respectively attached to the first rotating shaft and the second rotating shaft and meshed with each other, but two or more pairs of gears or planetary gear devices meshed with each other. Alternatively, it may have a bevel gear type differential gear device or the like, and the present invention can be applied to measurement of meshing transmission errors of various gear devices such as a transmission for a vehicle.

  The coupling device of the pulley row has flexibility that can be wound around the first fixed pulley and the second fixed pulley, and a string-like wire, a belt-like metal belt, or the like is preferably used. In the case of using a belt, since the diameter dimension changes when the fixed pulley is wound many times, the rotation speed control of the second constant pulley is performed by the synchronous electric motor in consideration of the change in the diameter dimension. It is desirable.

  When providing a pair of first pulley row and second pulley row as in the second and fourth inventions, a synchronous electric motor may be provided corresponding to each of these pulley rows. The second fixed pulleys of both pulley trains are mechanically connected to each other via an interlocking device composed of a pulley, a plurality of meshing gears, etc., and the second constant pulley of both pulley trains is rotated by a single synchronous electric motor. It can also be driven.

  If the first constant pulleys of the first pulley row and the second pulley row are configured with the same diameter, the difference in weight of the load weights directly corresponds to the load torque, but the diameter of the first constant pulley of both pulley rows. Need not be the same, and may be different from each other. In that case, a load torque according to the difference in diameter of the first constant pulley and the difference in weight of the load weight is applied to the second rotating shaft.

  In the second and fourth inventions, for example, (a) the first pulley row and the first pulley of the second pulley row are integrally provided on the same axis, and are integrated with each other as the second rotating shaft rotates. (B) the second and second pulleys of the first pulley row and the second pulley row are arranged on opposite sides of the first pulley, and the movable pulley A load torque corresponding to a difference in weight of the load weights to be attached is configured to be applied to the second rotating shaft. However, the first pulley train and the second pulley train are arranged separately including the first constant pulley, and the first constant pulley rotates independently with the rotation of the second rotating shaft via the interlocking device or the like. In addition, the torque in the reverse rotation direction may be applied to the second rotating shaft by a load weight attached to the moving pulley of each pulley row.

  When the pair of first constant pulleys of the first pulley row and the second pulley row are integrally arranged on the same axis as described above, the first constant pulleys are separately configured to be a common rotating shaft. Although it may be provided integrally, it is also possible to use a common single first pulley.

  A reduction gear can be provided between the driving electric motor and the first rotating shaft, or between the second constant pulley of the pulley train and the synchronizing electric motor, respectively. Since the one rotation shaft and the second constant pulley are decelerated and rotated, and the torque is amplified by the deceleration, a small electric motor having a small torque can be employed as the driving electric motor and the synchronizing electric motor.

  In the first invention, the first rotating shaft and the second constant pulley are driven to rotate by using the driving electric motor and the synchronizing electric motor. In implementing the third invention, for example, the driving electric motor Various modes are possible, such as the second constant pulley can be rotationally driven through a speed change mechanism or the like using as a power source.

  In the present invention, a pulley train is arranged on the second rotating shaft side so as to apply load torque, and the load torque can be received by a driving electric motor that rotationally drives the first rotating shaft. As in Patent Document 2, a pulley train may be provided on the first rotating shaft side, and a counterweight may be attached to the moving pulley to balance with the load weight on the second rotating shaft side. In this case as well, as with the pulley row on the second rotating shaft side, the second constant pulley is driven to rotate by the synchronous electric motor so that the vertical movement of the moving pulley and the load weight is maintained within a predetermined range. It ’s fine.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1A and 1B are diagrams for explaining a meshing transmission error measuring apparatus 10 according to an embodiment of the present invention. FIG. 1A is a plan view, and FIG. 1B is a view corresponding to a view from arrow B in FIG. 12 is a front view showing a case in which the meshing transmission error of the gear unit 14 is measured. The gear device 14 includes a pair of parallel shaft gears 16 and 18 that are meshed with each other such as a helical gear, and the parallel shaft gears 16 and 18 are respectively a first rotating shaft 20 and a second rotating shaft 22. It is attached integrally. The distance between the first rotating shaft 20 and the second rotating shaft 22 is set to the center distance between the pair of parallel shaft gears 16 and 18, and the parallel shaft gears 16 and 18 are respectively connected to the first rotating shaft 20 and the first rotating shaft 20. The rotary shaft 22 is detachably attached. The first rotary shaft 20 and the second rotary shaft 22 are provided with rotary encoders 24 and 26, respectively, for detecting their rotation angles, and for the first rotary shaft 20 for driving. An electric motor 28 is connected and is driven to rotate about the axis.

  The pulley train 12 has a pair of first and second constant pulleys 30 and 32 disposed at a fixed height, and both ends of both the first and second constant pulleys 30 and 32. Are connected to each other, and a movable pulley 36 that is vertically movable and is hooked to the connecting wire 34 so as to be relatively movable. The first fixed pulley 30 is connected to the second rotating shaft 22. It can be rotated integrally. A load weight 38 having a predetermined weight is suspended from the movable pulley 36, and a load torque corresponding to the weight of the load weight 38 is transmitted through the connecting wire 34, the first fixed pulley 30, and the second rotating shaft 22. It is transmitted to the device 14 and applied to the meshing portion of the pair of parallel shaft gears 16 and 18.

  The connecting wire 34 corresponds to a connecting tool, and when the first rotating shaft 20 is rotationally driven by the driving electric motor 28 by the number of rotations necessary for measurement of the meshing transmission error of the gear device 14, the second rotating shaft. 22 has a length dimension that allows rotation of the first fixed pulley 30 that is rotated integrally with the belt 22. For example, when the number of teeth of the pair of parallel shaft gears 16 and 18 is different, the meshing teeth meshing with each other change every rotation, and the meshing transmission error pattern for each rotation is different. In order to measure the meshing transmission error pattern, it is necessary to rotationally drive the first rotating shaft 20 by the number of rotations obtained by multiplying the number of teeth of the pair of parallel shaft gears 16 and 18. The length dimension of the connecting wire 34 is determined so as to allow the shaft 22 and the first fixed pulley 30 to rotate.

  As shown in FIG. 1B, the connecting wire 34 is wound around the first constant pulley 30 or the second constant pulley 32 in advance with a predetermined slack necessary for hooking the moving pulley 36. This is appropriately determined according to the rotation direction of the first fixed pulley 30 when measuring the meshing transmission error. When the first fixed pulley 30 is rotated counterclockwise in FIG. What is necessary is just to wind around the fixed pulley 32, and to wind up from the 2nd fixed pulley 32 at the time of a measurement, and to wind up by the 1st fixed pulley 30. When the first constant pulley 30 is rotated clockwise in FIG. 1B, the first constant pulley 30 is wound around the first constant pulley 30 in advance and unwound from the first constant pulley 30 at the time of measurement. What is necessary is just to make it wind up by the fixed pulley 32. FIG.

  A synchronous electric motor 40 is connected to the second constant pulley 32, and the connecting wire 34 is wound around the first constant pulley 30 by the rotation of the first constant pulley 30 accompanying the rotation of the second rotating shaft 22. Even if the first constant pulley 30 is rewound, the second constant pulley 32 is synchronized with the rotation of the first constant pulley 30 so that the moving pulley 36 and the load weight 38 are held at a substantially constant height position. , The connecting wire 34 is rewound from the second fixed pulley 32 or wound around the second fixed pulley 32. The electric motor 40 for synchronization is based on the detection value of the rotary encoder 26 that detects the rotation of the second rotary shaft 22 that is rotated integrally with the first fixed pulley 30 by a control device (not shown) having a microcomputer or the like. The second constant pulley 32 is controlled to rotate synchronously with respect to the first constant pulley 30, but a drive signal (signal corresponding to the rotational speed) for the drive electric motor 28 that rotationally drives the first rotary shaft 20. It is also possible to control based on the gear ratio of the gear unit 14 and the like. In the present embodiment, the first constant pulley 30 and the second constant pulley 32 have the same diameter, and the second constant pulley 32 may be rotationally driven in the same direction at the same speed as the first constant pulley 30.

  In such a meshing transmission error measuring device 10, the connecting wire 34 is wound around the first constant pulley 30 or the second constant pulley 32, and a load weight 38 having a predetermined weight is suspended from the movable pulley 36, thereby causing the gear device. 14 with a predetermined load torque (meshing torque) applied thereto, the first rotary shaft 20 is continuously rotated at a very slow rotational speed of, for example, 1 rpm or less by the drive electric motor 28, and the rotary encoders 24, 26 By detecting the rotation angles of the first rotating shaft 20 and the second rotating shaft 22, the meshing transmission error can be measured. While the first rotating shaft 20 is intermittently rotated by a small amount by the driving electric motor 28, the rotary encoders 24 and 26 detect the rotation angles of the first rotating shaft 20 and the second rotating shaft 22 in a stationary state, thereby generating a meshing transmission error. It is also possible to measure.

  Here, in this embodiment, the load torque is applied by the load weight 38 suspended from the movable pulley 36. Therefore, it is possible to stably apply a constant load torque determined by the weight of the load weight 38. Transmission errors can be measured with high accuracy.

  Further, even if the connecting wire 34 is wound around the first fixed pulley 30 or unwound from the first fixed pulley 30 by the rotation of the first constant pulley 30 accompanying the rotation of the second rotating shaft 22, Since the second constant pulley 32 is rotationally driven in synchronization with the rotation of the first constant pulley 30 by the electric motor 40 for synchronization so that the load weight 38 is held at a substantially constant height position, The meshing transmission error can be continuously measured by holding the load weight 38 at a substantially constant height position and rotating the first rotating shaft 20 several times. That is, by continuously setting the length dimension of the connecting wire 34 and winding it around the first constant pulley 30 or the second constant pulley 32, for example, all the meshing transmission error patterns of the gear unit 14 can be continuously measured. Can do it.

  In this case, even if the second constant pulley 32 is synchronously rotated by the synchronization electric motor 40, the moving pulley 36 and the load weight 38 are inevitably slightly moved up and down, and the first rotating shaft 20 is continuously rotated. When measuring the meshing transmission error, the load torque may change due to such vertical movement, but in this embodiment, the first rotary shaft 20 is rotationally driven at a very slow rotational speed of 1 rpm or less. Therefore, it is possible to almost completely eliminate the change of the load torque due to the influence of the inertia due to the vertical movement of the movable pulley 36 and the load weight 38, and the meshing transmission error can be continuously measured with high accuracy.

  Even when the meshing transmission error is continuously measured by rotating the first rotating shaft 20 many times, the movable pulley 36 and the load weight 38 are held at a substantially constant height position. The meshing transmission error measuring device 10 capable of stably applying torque and capable of continuous measurement can be configured compactly.

  In addition, since the second constant pulley 32 is rotationally driven by the synchronous electric motor 40, for example, the second constant pulley 32 is rotationally driven through the speed change mechanism or the like using the driving electric motor 28 as a power source. Compared to the above, the second constant pulley 32 can be easily and synchronously rotated with respect to the first constant pulley 30 even when the meshing transmission error of various gear devices 14 having different gear ratios is measured.

  Next, another embodiment of the present invention will be described. In the following embodiments, parts that are substantially the same as those in the above embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  The meshing transmission error measuring device 50 in FIG. 2 is provided with speed reducers 52 and 54 in the driving electric motor 28 and the synchronizing electric motor 40, respectively, as compared with the meshing transmission error measuring device 10 in the first embodiment. The first rotary shaft 20 and the second fixed pulley 32 can be rotated at a slow speed of 1 rpm or less while the electric motors 28 and 40 are driven to rotate within a normal rotational speed range with high control accuracy. . Further, since torque is amplified by being decelerated by the speed reducers 52 and 54, even when a large load torque is applied by the load weight 38, small electric motors are used as the drive electric motor 28 and the synchronization electric motor 40. Can be adopted. (A) and (b) in FIG. 2 correspond to (a) and (b) in FIG. 1, respectively. 3 to 12 below, (a) and (b) in each figure correspond to (a) and (b) in FIG. 1, respectively.

  The meshing transmission error measuring device 60 of FIG. 3 translates the pulley train 12 in a direction perpendicular to the axis of the second rotating shaft 22 as compared with the meshing transmission error measuring device 10 of the first embodiment. In some cases, the second rotating shaft 22 and the first fixed pulley 30 of the pulley train 12 are connected via an interlocking device 62 composed of a belt, a pulley, a plurality of meshing gears, and the like, and as the second rotating shaft 22 rotates. Thus, the first constant pulley 30 is mechanically rotated. By providing the interlocking device 62 in this way, the degree of freedom of the arrangement position of the pulley row 12 and the second rotation shaft 22 is increased. For example, the second rotation shaft 22 is centered on the axis of the first fixed pulley 30. By enabling parallel movement along the arc, the inter-axis distance between the first rotary shaft 20 and the second rotary shaft 22 can be changed while maintaining the connected state by the interlocking device 62, and the parallel shaft gear. It becomes possible to easily measure the meshing transmission error of various gear units 14 having different sizes of 16, 18 or center distances.

  The meshing transmission error measuring device 70 of FIG. 4 is for measuring the meshing transmission error of a gear device 76 in which the shaft centers of a pair of meshing gears 72 and 74 intersect or cross at right angles like a bevel gear or a hypoid gear. The first rotating shaft 20 and the second rotating shaft 22 are arranged so as to intersect or shift at a predetermined angle in accordance with the shaft centers of the gears 72 and 74. The second rotating shaft 22, the pulley train 12, and the synchronizing electric motor 40 can be rotated around a rotation center that is perpendicular to the paper surface of FIG. 4A and orthogonal to the first rotating shaft 20, for example. If it is arranged on a rotary table or the like, it can easily cope with a cross shaft gear such as a bevel gear. Further, on the rotary table, an upper and lower table that can be moved in the vertical direction perpendicular to the paper surface of FIG. 4A is provided, and the second rotary shaft 22 and the like are arranged on the upper and lower table. Also, it can easily cope with staggered shaft gears such as hypoid gears.

  A meshing transmission error measuring device 80 in FIG. 5 is for measuring a meshing transmission error of a gear device 84 such as a transmission for a vehicle in which a plurality of gears including a differential gear device 82 are engaged with each other. The shaft 22 is connected to the input shaft 86, while the first rotating shaft 20 is connected to one output shaft (side shaft) of the differential gear device 82. A third rotating shaft 90 is connected to the other output shaft (side shaft) of the differential gear device 82 and is driven to rotate about the axis by a drive electric motor 92 and has a rotational angle by a rotary encoder 94. It is to be detected. The drive electric motor 92 is controlled in synchronism with the drive electric motor 28 so as to integrally rotate the pair of output shafts of the differential gear device 82. For example, the drive electric motor 92 on both sides detected by the rotary encoders 24, 94 is used. By using the average value of the rotation angles of the output shaft and comparing it with the rotation angle of the input shaft 86 detected by the rotary encoder 26, it is possible to measure the total meshing transmission error of the gear device 84. Further, if noise is removed by frequency analysis or the like, the rotation angle of one output shaft detected by the rotary encoder 24 and the rotation angle of the input shaft 86 detected by the rotary encoder 26 are compared, and one of the outputs is compared. The transmission error of the mesh between the shaft and the input shaft 86 is measured, or the rotation angle of the other output shaft detected by the rotary encoder 94 is compared with the rotation angle of the input shaft 86 detected by the rotary encoder 26. It is also possible to measure the meshing transmission error between the other output shaft and the input shaft 86. The third rotating shaft 90 corresponds to the first rotating shaft of claims 1 and 3.

  If the pair of output shafts of the differential gear device 82 are mechanically connected via a connecting device or the like so as to rotate integrally, the third rotating shaft 90, the driving electric motor 92, and the rotary encoder 94 are connected. Can be omitted. Further, when the pair of output shafts are mechanically connected in this way, the second rotating shaft 22, the pulley train 12, the synchronous electric motor 40, etc. are disposed on the output shaft side and the load weight 38 is used to load the output shaft. While applying torque, the transmission error measurement can also be performed by arranging the first rotating shaft 20 and the driving electric motor 28 on the input shaft 86 side and driving the rotation.

  The meshing transmission error measuring device 100 in FIG. 6 is a case where the first pulley example 102 and the second pulley row 104 are arranged on opposite sides of the second rotating shaft 22. The first pulley row 102 and the second pulley row 104 are configured in the same manner as the pulley row 12, and are connected as first fixed pulleys 106 and 108, second constant pulleys 110 and 112, and a connecting tool, respectively. The wires 114 and 116 and the movable pulleys 118 and 120 are provided, and the first fixed pulleys 106 and 108 are all attached to the second rotating shaft 22 and can be rotated integrally with each other. The second constant pulley 110 and the moving pulley 118 of the first pulley row 102 and the second constant pulley 112 and the moving pulley 120 of the second pulley row 104 are opposite to each other across the first constant pulleys 106 and 108. Torques in opposite directions are applied to the second rotary shaft 22 by the load weights 122 and 124 suspended from the movable pulleys 118 and 120, and the difference in weight between the load weights 122 and 124 is caused. Is applied to the second rotating shaft 22. In the present embodiment, the diameters of the first constant pulleys 106 and 108 are the same, and the difference in weight between the load weights 122 and 124 directly corresponds to the load torque.

  Further, as the second rotary shaft 22 rotates, one of the connecting wires 114 and 116 is unwound from the first fixed pulley 106 or 108 and the other is wound around the first fixed pulley 106 or 108. The second constant pulley 110 is synchronized with the rotation of the first constant pulleys 106 and 108 so that the movable pulleys 118 and 120 and the load weights 122 and 124 are held at a substantially constant height position regardless of winding. , 112 are rotationally driven by the electric motors 126, 128 for synchronization, respectively, one of the connecting wires 114, 116 is unwound from the second fixed pulley 110 or 112, and the other is wound around the second constant pulley 110 or 112. It is supposed to be.

  In this case, it is possible to apply the load torque in the opposite direction (reverse rotation direction) simply by changing the load weights 122 and 124 on both sides. For example, the drive state and the driven state, or the forward rotation drive and the reverse rotation. It is possible to easily measure a meshing transmission error due to power transmission in which the tooth surface on the opposite side contacts, such as driving. In addition, since the load torque is applied by the difference in weight between the pair of load weights 122 and 124 as described above, it is possible to apply a minute load torque with high accuracy and further improve the measurement accuracy of the meshing transmission error. In addition, it is possible to substantially measure the meshing transmission error at zero load by applying a load torque so as to cancel the rotational resistance of each part such as sliding resistance. That is, in FIG. 6 (b), when the first constant pulleys 106, 108 are rotated clockwise, for example, the load weights 122, 124 on both sides are applied so that torque corresponding to the rotational resistance is applied clockwise. Is set, the gear device 14 can be meshed and rotated with a load of zero.

  The meshing transmission error measuring device 130 in FIG. 7 is a case where speed reducers 52, 132, and 134 are provided like the meshing transmission error measuring device 50 in FIG. 2 with respect to the meshing transmission error measuring device 100 in FIG. The first rotating shaft 20 and the second fixed pulleys 110 and 112 are driven at a slow speed of 1 rpm or less while the driving electric motor 28 and the synchronizing electric motors 126 and 128 are rotationally driven within a normal rotational speed range with high control accuracy. Can be rotated. Further, since the torque is amplified by being decelerated by the reduction gears 52, 132, and 134, even when a large load torque is applied by the load weights 122 and 124, the driving electric motor 28 and the synchronizing electric motors 126 and 128 are applied. A small electric motor can be used.

  The meshing transmission error measuring device 140 shown in FIG. 8 is the same as the meshing transmission error measuring device 100 shown in FIG. 3 except that the first pulley row 102 and the second pulley row 104 are integrated with each other. This is a case where the second rotary shaft 22 is translated in a direction perpendicular to the axis of the second rotary shaft 22 and the second rotary shaft 22 and the first fixed pulleys 106 and 108 are mechanically connected via the interlocking device 62. The first fixed pulleys 106 and 108 are separately configured, but are attached to a common rotating shaft 142 and are rotated integrally with each other. By providing the interlocking device 62 in this way, the degree of freedom of the arrangement positions of the first pulley row 102, the second pulley row 104, and the second rotating shaft 22 is increased. For example, the second rotating shaft 22 is connected to the rotating shaft 142. The distance between the first rotating shaft 20 and the second rotating shaft 22 can be changed while maintaining the connected state by the interlocking device 62 by enabling parallel movement along an arc centered on the axis of the shaft. It is possible to easily measure the meshing transmission error of various gear devices 14 having different sizes or central distances of the parallel shaft gears 16 and 18.

  The meshing transmission error measuring device 150 in FIG. 9 is the same as the meshing transmission error measuring device 100 in FIG. 6, as in the meshing transmission error measuring device 70 in FIG. 4. This is a case where it is possible to measure the meshing transmission error of the gear device 76 that is misaligned or misaligned. Also in this embodiment, the second rotating shaft 22, the pulley trains 102 and 104, and the synchronizing electric motors 126 and 128 are, for example, perpendicular to the paper surface of FIG. 9A and orthogonal to the first rotating shaft 20. If it is arranged on a rotary table or the like that can be rotated around the rotation center, it can be easily applied to a cross shaft gear such as a bevel gear. Further, an upper and lower table that can be moved in the vertical direction perpendicular to the paper surface of FIG. 9A is provided on the rotary table, and the second rotary shaft 22 and the like are provided on the upper and lower table. Also, it can easily cope with staggered shaft gears such as hypoid gears.

  The meshing transmission error measuring device 160 in FIG. 10 is the same as the meshing transmission error measuring device 100 in FIG. 6 except for the gearing device such as a transmission for a vehicle including the differential gear device 82 like the meshing transmission error measuring device 80 in FIG. 84, the third rotation shaft 90, the drive electric motor 92, and the like to drive the other output shaft of the differential gear device 82 and detect the rotation angle. And a rotary encoder 94 is provided.

  The meshing transmission error measuring device 170 of FIG. 11 omits the synchronization electric motor 128 on the second pulley row 104 side in the meshing transmission error measuring device 100 of FIG. 6, and is interlocked with a belt, a pulley, a plurality of meshing gears, and the like. By mechanically connecting the second constant pulleys 110 and 112 of both pulley trains 102, 104 via the device 172, the second constant pulleys 110 and 112 are both brought together by a single synchronous electric motor 126. It is designed to rotate. The rotation directions of the second constant pulleys 110 and 112 are the same, and the rotation speed is determined according to the diameter dimension. In this embodiment, the second constant pulleys 110 and 112 and the first constant pulleys 106 and 108 have any diameter dimension. And the rotation speed may be the same. Therefore, the interlocking device 172 may be provided so that the second constant pulleys 110 and 112 rotate in the same rotational direction at the same speed.

  The meshing transmission error measuring device 180 of FIG. 12 is the same as the meshing transmission error measuring device 10 of the first embodiment, and a pulley row 182 is also arranged on the first rotating shaft 20 side to suspend the counterweight 184, and the second This is balanced with the load weight 38 on the rotating shaft 22 side. Similar to the pulley row 12, the pulley row 182 includes a first constant pulley 186, a second constant pulley 188, a connecting wire 190 as a connecting tool, and a moving pulley 192, and a counterweight 184 is provided on the moving pulley 192. While being suspended, the first fixed pulley 186 is attached to the first rotating shaft 20 and is rotated integrally. As the first rotating shaft 20 rotates, the connecting wire 190 is unwound from the first fixed pulley 186 or wound around the first fixed pulley 186, but the moving pulley 192 is irrelevant to the rewinding or winding. The second constant pulley 188 is driven to rotate by the synchronizing electric motor 194 in synchronization with the rotation of the first constant pulley 186 so that the counterweight 184 is held at a substantially constant height position. Is rewound from the second fixed pulley 188 or wound around the second fixed pulley 188. FIG. 12C is a front view showing the pulley row 182 corresponding to the view taken along the arrow C in FIG.

  In this case, since the load of the load weight 38 can hardly be applied to the drive electric motor 28, the drive electric motor 28 only needs to rotate the first rotating shaft 20, and applies a large load torque. Even when the transmission error is measured, the first rotary shaft 20 can be stably rotated at a constant rotational speed, and a small and inexpensive electric motor can be employed as the driving electric motor 28.

  A pair of pulley rows such as the first pulley row 102 and the second pulley row 104 in FIG. 6 are also provided on the first rotating shaft 20 side, and a pair of fishing gears in which torque acts in the reverse rotation direction. It is possible to suspend the weight.

  As mentioned above, although the Example of this invention was described in detail based on drawing, these are one Embodiment to the last, This invention is implemented in the aspect which added the various change and improvement based on the knowledge of those skilled in the art. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic explaining the meshing transmission error measuring apparatus which is one Example of this invention, (a) is a top view, (b) is a front view of the pulley row | line | column equivalent to the B arrow view in (a). It is a figure explaining the other Example of this invention, and is a case where the reduction gear is provided in each electric motor, (a) is a top view, (b) is a pulley row | line | column equivalent to the B arrow view in (a) FIG. It is a figure explaining another Example of this invention, and is a case where a pulley row | line | column is connected via an interlocking device, (a) is a top view, (b) is equivalent to the arrow B view in (a). It is a front view of a pulley row. FIG. 6 is a diagram for explaining still another embodiment of the present invention, in which the transmission error of meshing of a cross shaft gear or a staggered shaft gear is measured, (a) is a plan view, and (b) is a view in the direction of arrow B in (a). It is a front view of a pulley row corresponding to the figure. FIG. 6 is a diagram for explaining still another embodiment of the present invention, in which a transmission error of a gear device having a differential gear device such as a vehicle transmission is measured, (a) is a plan view, and (b) is a plan view. It is a front view of the pulley row | line | column equivalent to the arrow B view in (a). It is a figure explaining another Example of this invention, and is a case where a pulley row | line | column is provided in the both sides of a 2nd rotating shaft, and the load torque equivalent to the difference of a load weight is provided, (a) is a top view , (B) is a front view of a pulley train corresponding to the B arrow view in (a). FIG. 7 is a diagram illustrating still another embodiment of the present invention, in which each electric motor of the embodiment of FIG. 6 is provided with a speed reducer, (a) is a plan view, and (b) is an arrow B in (a). It is a front view of a pulley row corresponding to a view. FIG. 7 is a diagram illustrating still another embodiment of the present invention, in which the pulley train is connected via the interlocking device in the embodiment of FIG. 6, (a) is a plan view, and (b) is B in (a). It is a front view of a pulley row corresponding to an arrow view. FIG. 6 is a diagram for explaining still another embodiment of the present invention, in which the transmission error of a cross shaft gear or a staggered shaft gear is measured in the embodiment of FIG. 6, (a) is a plan view, and (b) is ( It is a front view of the pulley row | line | column equivalent to the B arrow directional view in a). FIG. 7 is a diagram for explaining still another embodiment of the present invention, in which the transmission error of a gear device having a differential gear device such as a vehicle transmission is measured in the embodiment of FIG. Fig. 2 (b) is a front view of the pulley train corresponding to the view of arrow B in (a). FIG. 7 is a diagram for explaining still another embodiment of the present invention, in which the second fixed pulleys of both pulley rows in the embodiment of FIG. 6 are mechanically connected by an interlocking device, (a) is a plan view, ) Is a front view of a pulley train corresponding to the view on arrow B in (a). FIG. 6 is a diagram for explaining still another embodiment of the present invention, and in the embodiment of FIG. 1, a pulley row is also provided on the first rotating shaft side and is balanced with a load weight on the second rotating shaft side by a counterweight. (A) is a plan view, (b) is a front view of a pulley train corresponding to the B arrow view in (a), and (c) is a pulley train equivalent to the C arrow view in (a). It is a front view.

Explanation of symbols

10, 50, 60, 70, 80, 100, 130, 140, 150, 160, 170, 180: Meshing transmission error measuring device 12: Pulley train 14, 76, 84: Gear device 20: First rotating shaft 22: First 2 rotary shafts 24, 26, 94: rotary encoders 28, 92: electric motors for driving 30, 106, 108: first fixed pulleys 32, 110, 112: second fixed pulleys 34, 114, 116: connecting wires (connectors) 36, 118, 120: Dynamic pulleys 38, 122, 124: Load weights 40, 126, 128: Synchronous electric motor 90: Third rotation shaft (first rotation shaft) 102: First pulley train 104: Second pulley Column

Claims (4)

In a state where a predetermined load torque is applied to the first rotating shaft and the second rotating shaft connected via a gear device having a plurality of gears meshing with each other, the first rotating shaft is rotationally driven to mesh the gear device. An apparatus for measuring a meshing transmission error of the gear device by detecting a rotation angle of each of the first rotating shaft and the second rotating shaft by a rotary encoder,
An electric motor for driving that rotationally drives the first rotating shaft;
A pair of first constant pulley and second constant pulley, a connection tool connected to both the first fixed pulley and the second fixed pulley and wound around one of the predetermined lengths, and relative to the connection tool A movable pulley that is movably hooked, and a pulley train in which the first constant pulley is mechanically rotated in accordance with the rotation of the second rotation shaft;
A load weight attached to the movable pulley and applying the load torque to the second rotating shaft via the connector and the first fixed pulley by gravity;
When the first fixed pulley is rotated along with the rotation of the second rotating shaft, the movable pulley is moved up and down even if the connector is wound around the first fixed pulley or unwound from the first fixed pulley. Is rotated within the predetermined range so as to rotate the second constant pulley in synchronism with the rotation of the first constant pulley, thereby rewinding the connector from the second constant pulley or the second constant pulley. A synchronous electric motor wound around a fixed pulley;
An apparatus for measuring a meshing transmission error, comprising: The pulley train includes a first pulley train and a second pulley train each having the first constant pulley, the second constant pulley, a connector, and a moving pulley,
The load weights attached to the moving pulleys of the first pulley row and the second pulley row respectively act on the second rotating shaft in reverse rotation directions, and load torque corresponding to the difference in weight between the two load weights. The meshing transmission error measuring device according to claim 1, wherein the measuring device is a transmission error measuring device. In a state where a predetermined load torque is applied to the first rotating shaft and the second rotating shaft connected via a gear device having a plurality of gears meshing with each other, the first rotating shaft is rotationally driven to mesh the gear device. The rotation angle of each of the first rotation shaft and the second rotation shaft is detected by a rotary encoder and the transmission error of the gear device is measured.
A pair of first constant pulley and second constant pulley, a connection tool connected to both the first fixed pulley and the second fixed pulley and wound around one of the predetermined lengths, and relative to the connection tool A movable pulley that is movably hooked, and the first fixed pulley is provided with a pulley train that is mechanically rotated in accordance with the rotation of the second rotation shaft,
While attaching a load weight to the movable pulley and applying the load torque to the second rotation shaft by the gravity of the load weight, the first rotation shaft is rotationally driven to mesh and rotate the gear device,
When the first fixed pulley is rotated along with the rotation of the second rotating shaft, the movable pulley is moved up and down even if the connector is wound around the first fixed pulley or unwound from the first fixed pulley. Is rotated within the predetermined range so as to rotate the second constant pulley in synchronism with the rotation of the first constant pulley, thereby rewinding the connector from the second constant pulley or the second constant pulley. A method for measuring a meshing transmission error, characterized by being wound around a fixed pulley. The pulley train includes a first pulley train and a second pulley train each having the first constant pulley, the second constant pulley, a connector, and a moving pulley,
The load weights attached to the moving pulleys of the first pulley row and the second pulley row respectively act on the second rotating shaft in reverse rotation directions, and load torque corresponding to the difference in weight between the two load weights. The method for measuring a meshing transmission error according to claim 3, wherein the meshing transmission error is measured.

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