JP2002168618A - Method and device for testing gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate loss in testing time and to prolong the life time of a reference gear 1 to be replaced in a device, and a method for testing a gear by a method wherein both gears are engaged with each other. SOLUTION: The gear testing device is equipped with a synchronizing means, consisting of a gear mechanism that synchronizes the phase of the reference gear 1 with that of a gear 20 to be tested under rotational condition. The gear testing device further equipped with a test gear synchronizing means, that synchronizes the phase of the gear 20 to be tested with that of a gear 11 under rotational condition. Before testing, the rotational direction, the number of rotations are the phases of the threads/roots are set in a condition similar to the case, where the gear 20 to be tested rotates in engagement with the reference gear 1. As a result, both of the gears can smoothly go into the adequate engagement condition so that it is possible to eliminate the loss of the time and the collision of the gear teeth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear testing device and a gear testing method for testing the strain of a gear under test.

[0002]

2. Description of the Related Art A gear having a strain causes noise and unstable operation. Therefore, after manufacturing, the gear is subjected to a strain test using a gear testing apparatus to remove defective products.

[0003] A conventional gear testing apparatus employing a double-toothed meshing system is configured such that the reference gear and the test gear are mutually movable in a state in which the reference gear and the test gear are relatively movable in the direction of coming and going. The strain of the gear under test is tested by urging it in the approaching direction, engaging and rotating it, and measuring the change in the center-to-center distance between the reference gear and the gear under test. For example, as shown in FIG. 4, a conventional gear testing apparatus uses a reference gear 30 as a support / drive system for the reference gear 30.
A fixed shaft 31 supporting the reference gear 30, a drive motor 34 mounted coaxially with the fixed shaft 31 to rotate the reference gear 30, and supporting the fixed shaft 31 and approaching the test gear 38 by the cylinder 33. And a swing table 32 movable in the direction. Further, the conventional gear testing apparatus includes a guide post 39 that supports the test gear 38 at the same height as the reference gear 30 so as to be rotatable and detachable substantially horizontally, as a support system for the test gear 38, and a guide post 39. Is provided. Each test gear 38 is attached to and detached from the guide post 39 for each test. In addition, the conventional gear testing apparatus uses a swing table 32 as a measurement system.
A distance sensor 35 mounted on the top and measuring the distance between the swing table 32 and the fixed table 36; a displacement sensor 37 inserted into the guide post 39 to measure the displacement of the inner diameter of the gear 38 to be tested; And a calculation storage device 40 for calculating a change in the distance between the guide post 39 and the fixed shaft 31 on the basis of the measured value.

A specific example of the above-described gear testing apparatus is disclosed in Japanese Patent Laid-Open Publication No. 2000-84773,
No. 7103 gazette.

[0005]

When a conventional gear testing apparatus is used in a production line or the like, the two gears do not engage with each other in a stopped state in order to perform a continuous test.
The reference gear 30 is engaged with the gear under test 38 in a rotated state.

On the other hand, since the phase of the peaks and valleys of the teeth with respect to the reference gear 30 changes each time the test gear 38 is detached, the rotating reference gear 30 and the stopped test gear 38 are engaged with each other while approaching each other. Often, the peaks and valleys of each other do not mesh well with each other. In such a case, the test gear 38 rotates with the reference gear 30 while the peaks are in contact with each other, and after a while the peaks and valleys normally mesh, and then the test is started.

Therefore, in the conventional gear testing apparatus, there is a problem that time is lost during rotation while the peaks are in contact with each other and the total test time for performing a series of tests is long.
Further, since the reference gear 30 is urged by the cylinder 33 to the test gear 38, the tooth surfaces of the two gears are shocked at the moment when the ridges and valleys come into a normal meshing state from the state where the ridges are in contact with the ridges. In this case, the tooth surface of the reference gear 30 is damaged or worn, and the test accuracy is likely to be reduced. Therefore, there is a problem that the reference gear 30 must be replaced in a short period of time in order to maintain the test accuracy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gear testing method and a gear testing apparatus for testing the strain of a gear to be tested by a double-toothed meshing method, from a state of rotation caused by contact between peaks to normal engagement. To reduce the total test time by reducing the time loss of the reference gear, and at the same time, reduce the damage and wear of the tooth surface of the reference gear and prolong the replacement life of the reference gear.

[0009]

In order to solve the above-mentioned problems, according to the present invention, the reference gear (1) and the gear under test (19) are relatively moved in the direction of coming and coming from each other. The reference gear and the test gear are urged in a direction approaching each other in a freely movable state, meshed and rotated, and a change in the center-to-center distance between the reference gear and the test gear is measured. In the gear testing device for testing the strain of the gear to be tested, when testing the gear to be tested, before bringing the reference gear and the gear to be tested close together and meshing with each other,
Synchronizing means for rotating the reference gear and the test gear in a state where the phase of the reference gear and the phase of the test gear are synchronized so that their peaks and valleys mesh with each other.

According to the first aspect of the present invention, before the reference gear meshes with the test gear by the synchronization means, the test gear engages with the reference gear and rotates at the same rotational speed and rotational direction. And the phase of the peaks and valleys of the teeth. Therefore, even if the reference gear and the test gear are brought close to each other, the meshes are smoothly engaged without the mutual contact between the peaks as in the conventional case. Impact contact between the two tooth surfaces can be avoided.

According to a second aspect of the present invention, in the gear testing apparatus according to the first aspect, the synchronizing means is arranged coaxially with the reference gear, and rotates synchronously with the reference gear. A gear (gear 8), a second gear (gear 11) arranged coaxially with the test gear and capable of rotating integrally with the test gear, a first gear and a second An even number of third gears (gear 9, gear 10) arranged to transmit rotation between the gears and the first to third gears in a state where the first to third gears mesh with each other. Support means (links 12 to 14) for supporting the first to third gears so as to be slidable in a direction in which the second gear is moved toward and away from each other, wherein the first to third gears are The phase of the reference gear and the phase of the gear under test are transmitted in synchronization with each other so that the peaks and valleys mesh with each other. Characterized in that it.

According to the second aspect of the invention, the same effects as those of the first aspect can be obtained, and the synchronization means of the first aspect can be realized with a simple configuration using gears. The first gear may also serve as a reference gear by setting the position of the first gear to a position where the first gear meshes with the gear to be tested.

According to a third aspect of the present invention, in the gear testing apparatus according to the second aspect, the first gear is a gear having the same number of teeth as the reference gear, and the second gear is the gear to be tested. And the third gear is a gear that meshes with the first gear, and a gear that meshes with both the gear and the second gear. The number of gear teeth is equal to each other.

According to the third aspect of the present invention, the same effect as that of the second aspect is obtained, and the synchronization means according to the second aspect can be realized with the simplest and the smallest number of parts.

The invention according to claim 4 is the invention according to claim 2 or 3.
2. The gear testing device according to claim 1, wherein the second gear has the same number of teeth as the gear to be tested, and the shaft (the guide post 2) rotatably and detachably supports the gear to be tested coaxially with the second gear.
1) is provided, and a gear to be tested synchronization means (telescopic pin 19) for synchronizing the phase of the gear to be tested and the phase of the second gear attached to the shaft portion so that the positions of the valleys overlap each other.
It is characterized by having.

According to the fourth aspect of the invention, the same effect as that of the second or third aspect is obtained. Further, while the test gear is rotatably and detachably supported, the phase of the test gear and the second gear are finally shifted by the gear to be tested so that the positions of the hills and valleys overlap. When the test is continuously performed in a production line or the like by performing positioning and synchronization, the shaft section supporting the gear to be tested is stopped and replaced, and the gear to be tested and the second gear are The gear to be tested can be brought into a desired rotation state again by the synchronizing means. Therefore,
The time required to stop other parts, such as the reference gear, and return to the predetermined number of revolutions again with the replacement work is not required, so that the entire test time can be reduced.

According to a fifth aspect of the present invention, there is provided the gear testing device according to any one of the second to fourth aspects, wherein the supporting means includes two gears meshing with each other in the first to third gears. And a link mechanism rotatably connected at the center of rotation of a gear simultaneously supported by the two link pieces.

According to the fifth aspect of the present invention,
In the state where the first to third gears described in claim 2 are in mesh with each other, the first gear and the second gear can be brought into and out of contact with each other while exhibiting the same effect as any one of the fourth and fourth aspects. Support means for supporting the first to third gears so as to be slidable can be realized with a simple configuration. Therefore,
This is advantageous in terms of cost when implementing the present invention.

According to a sixth aspect of the present invention, there is provided a gear testing method using the gear testing device according to any one of the first to fifth aspects, wherein the reference gear and the test gear are brought closer to each other. In a state where the reference gear and the gear under test are measured while measuring the change in the center-to-center distance between the reference gear and the gear under test, when the strain of the gear under test is tested, the reference gear and the gear under test are used. And both are rotated, and after synchronizing the phase of the reference gear and the phase of the test gear so that peaks and valleys mesh with each other, the reference gear and the test gear are mutually It is characterized by approaching and engaging.

According to the sixth aspect of the present invention, the gear to be tested before meshing with the reference gear rotates at the rotational speed and rotation direction and the peak and valley phases of the teeth that mesh with the reference gear. Even if the test gears are brought closer to each other, the tooth ridges of the two gears are smoothly meshed without contacting each other as in the related art. Therefore, it is possible to eliminate the time loss as in the related art, to shorten the entire test time, and to avoid an abutting contact between the tooth surfaces of the two teeth at the moment when a normal meshing state occurs.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. The gear testing apparatus according to the embodiment of the present invention includes a reference gear support driving unit A that supports and drives the reference gear 1, a measured gear support unit B that supports the test gear 20, Measuring means C for measuring data; synchronizing means D for synchronizing the rotation phases of the reference gear 1 and the gear under test 20; and the phase of the gears under test 20 and the synchronizing means D during rotation of the gear 11 to be described later. Gear synchronizing means for synchronizing the test gears. Further, the gear testing device includes a base 23 that supports the reference gear support driving means A, the gear under test B, and the like.

As shown in FIG. 1, the reference gear supporting / driving means A is attached to a reference gear 1, a fixed shaft 2 supporting the reference gear 1, and coaxially and integrally rotatable with the fixed shaft 2. And a drive motor 7 for rotating the reference gear 1 and a fixed shaft 2
And a rocking table 4 for supporting. The swing table 4 is a base 2
The reference gear 1 is slidable in a substantially horizontal direction by a cylinder 6 above the reference gear 3, and the reference gear 1 is urged by a spring 5 toward the test gear 20 with a predetermined force.

The gear-under-measurement means B is provided with a gear 20 under test.
A guide post 21 for supporting the guide post 21 in a detachable manner coaxially, a guide post receiver 18 for supporting the guide post 21 rotatably coaxially, and a shaft portion 18 of the guide post receiver 18
a of a synchronizing means D, which will be described later, which is coaxially and rotatably mounted on
And a fixing base 15 for supporting the same.

The measuring means C is a distance sensor 3 mounted on the swing base 4 for measuring the distance between the swing base 4 and the fixed base 15.
A displacement sensor 16 inserted into the guide post 21 for measuring the displacement of the inner diameter of the gear under test 20, and a gap between the guide post receiver 18 and the fixed shaft 2 caused by rotation based on the measured values of both sensors. And an operation storage device 22 for determining a change in distance. The arithmetic storage device 22 includes a CPU, various memories, and a display device such as a CRT, and each component is connected to the distance sensor 3 and the displacement sensor 16 by a signal line such as a bus.

The synchronizing means D is a gear group consisting of four gears 8 to 11 for transmitting rotation by synchronizing the phase of the reference gear 1 and the phase of the gear under test 20 with each other so that the peaks and valleys mesh with each other. And a link mechanism including links 12 to 14 supporting the gear group.

The gear 8 is a gear having the same number of teeth Z1 as the reference gear 1 and is mounted on the fixed shaft 2 so as to be coaxially rotatable integrally therewith.
And the peaks of the teeth and the peaks / valleys and valleys are arranged so as to overlap. The gear 9 and the gear 10 have the same number of teeth, and the gear 9 meshes with the gear 8, and the gear 10 meshes with the gear 9. The gear 10 meshes with the gear 11. The gear 11 is a gear having the same number of teeth Z2 as the gear under test 20,
The guide post receiver 18 is mounted coaxially and integrally rotatable on a shaft portion 18 a of the guide post receiver 18.

On the other hand, the link 12 is rotatably mounted on the fixed shaft 2 via a bearing, and the other end is rotatably mounted on the shaft of the gear 9. The link 13 supports the shafts of the gears 9 and 10, and the link 14 is rotatably mounted on the shaft portion 18 a of the guide post receiver 18 via a bearing, and the other end is rotatably mounted on the shaft of the gear 10. . Therefore, the gear group is slidably supported in a direction in which the gear 8 and the gear 11 are separated from each other while being engaged with each other.

The test gear synchronizing means includes a telescopic pin 19 having a tapered tip attached to an upper surface of a guide post receiver 18 and an actuator 17 for operating the telescopic pin 19. The gear-under-test synchronizing means is provided with a telescopic pin 19 from the lower surface to the tooth valley of the gear under test 20.
Is inserted, and the phase of the gear 11 is synchronized with the gear 11 during rotation by positioning the gear under test 20 and the guide post receiver 18.

Next, the operation of this embodiment will be described. First, the reference gear 1 is fixed to the fixed shaft 2 and rotated by the drive motor 7. In the case of the above configuration, the rotational force is transmitted in the order of the gear 8, the gear 9, the gear 10, and the gear 11 (FIG. 3A). That is, the same number of teeth Z1 as the reference gear 1
And a gear 8 that rotates integrally with the reference gear 1;
Two gears (gear 9 and gear 1) having the same number of teeth Z3 between the guide post receiver 18 and the gear 11 having the same number of teeth Z2 as the gear under test 20 and rotating integrally with the guide post receiver 18.
0). Since this gear has the same number of teeth Z3, the rotation speed of the gear is transmitted to the gear 11 without shifting. Accordingly, the gear 8 having the same number of teeth Z1 as the reference gear 1 and the gear 11 having the same number of teeth Z2 as the gear under test 20 are formed.
The rotation is reversed at the same rotation speed ratio Z1 / Z2 as in the state of meshing with each other. In addition, since the four gears sequentially mesh with the adjacent gears, the gears at both ends eventually have a phase in which the peaks and valleys mesh.

Further, by connecting the four gears by the above-described link mechanism, the two gears arranged on each link piece have a constant interval, and maintain a meshing state even when the link mechanism is moved. . In addition, a link mechanism having a link piece rotatably connected to the center axis of the gear sequentially enables the gear and the gear attached to both ends thereof to be slidably movable in a direction relatively close to and away from each other. connect.

Next, the gear under test 20 is connected to the guide post 21.
Attach to Next, when the telescopic pin 19 is pushed upward from the lower surface of the test gear 20 by the actuator 17, the tip of the telescopic pin 19 fits into the valley of the test gear 20, and the test gear 20 is engaged with the guide post receiver 18. . At this time, the gear 11 rotating integrally with the guide post receiver 18 and the guide post receiver 18
And the test gear 20 that rotates integrally, the phases are synchronized so that the peaks and the valleys and the valleys and the valleys overlap, and the rotational speed ratio Z1 / Z2 is opposite to the reference gear 1. (FIG. 3B). That is, the gear under test 20 is the same as the reference gear 1 in the conventional gear testing apparatus.
Have the same rotational direction and speed ratio as those when the gear 20 and the test gear 20 are directly engaged.

Next, the swing table 4 is slid by the cylinder 6 to bring the reference gear 1 and the test gear 20 closer. When the tip gear cylinder of the gear under test 20 comes into contact with the reference gear 1,
The distal end of the telescopic pin 19 is retracted by the actuator 17 so as not to interfere with the reference gear 1. Since the two gears are in phase with each other at the peaks and valleys, normal meshing is smoothly achieved without contact between the peaks (FIG. 3C).

After the reference gear 1 and the gear under test 20 are normally engaged, the operation is the same as that of the conventional test apparatus. That is,
The distance sensor 3 mounted on the rocking table 4 measures the distance between the rocking table 4 and the fixed table 15 of the guide post, and the displacement sensor 16 inserted in the guide post changes the displacement of the inner diameter of the gear under test 20. Is measured. The arithmetic and storage unit 22 obtains a change in the center distance between the fixed shaft 2 and the guide post 21 due to rotation based on the measured values of both sensors,
Judge the distortion.

In the above embodiment, the gear 8
The gear 9 and the gear 10 that transmit between the gear 11 and the gear 11 are used. However, the present invention is not limited to this, and if the gear 8 and the gear 11 are transmitted so as to rotate in reverse (for even numbers, For example, the number is not limited to two and may be four or more. Further, it is not necessary that all the gears transmitting between the gear 8 and the gear 11 have the same number of teeth, and it is sufficient that the rotation speed ratio between the gear 8 and the gear 11 finally becomes Z1 / Z2.

Although the rotation transmitting means between the gear 8 and the gear 11 is based on a gear group and a link mechanism, a method using a cog belt or a chain may be used.
Instead of the mechanical connection as described above,
A separate drive motor may be provided on the side 8 to obtain a rotation with a rotation speed ratio Z1 / Z2 in which the rotation phases are synchronized under the control of the drive motor.

The telescopic pin 19 and the actuator 1
The means for synchronizing the guide post receiver 18 and the gear under test 20 by 7 is also optional, and a meshing clutch or an electromagnetic clutch may be used.

In addition, specific types, numbers, and arrangements of gears, and supporting forms of shafts and links can be appropriately changed in applying the present invention in order to test different types of gears. Of course.

[0038]

According to the first aspect of the present invention, during the test, the gear under test 20 is rotated in the same manner as the case where it rotates by meshing with the reference gear 1 by the synchronizing means D. Rotate in the valley phase. Therefore, the reference gear 1
Even if the test gear 20 and the test gear 20 are brought close to each other, the gears are smoothly engaged with each other, so that there is no time loss as in the related art, and it is possible to avoid an abutting contact between both tooth surfaces. Can be extended.

According to the second aspect of the present invention, the same effect as that of the first aspect is obtained, and the synchronization means D of the first aspect can be realized with a simple configuration using gears.

According to the third aspect of the invention, the same effects as those of the second aspect are obtained, and the rotational direction and the number of revolutions of the gear to be measured 20 and the phases of the peaks and valleys are compared with the reference gear 1 before the test. The synchronizing means D according to the first aspect of the present invention which makes the same state as the case of meshing and rotating can be realized with the simplest and small number of parts, which is advantageous in cost.

According to the fourth aspect of the present invention, the same effects as those of the second or third aspect are obtained, and the guide post 21 for supporting the gear under test 20 when the test is continuously performed on a production line or the like. Only the stop is carried out and the replacement work is performed, and the test gear 20 and the gear 11 are synchronized by the telescopic pin 19, so that the test gear 20 can be brought into a desired rotation state again. Therefore, the time required for stopping other parts such as the reference gear 1 and returning to the predetermined number of rotations is not required during the replacement work, so that the entire test time can be reduced.

According to the fifth aspect of the present invention,
In addition to providing the same effect as any one of the fourth and fourth aspects, the gears 8 to 11 described in claim 2 are slidably supported in a direction in which the gears 8 and 11 come into contact with and separate from each other in a state where they are engaged with each other. The support means can be realized with a simple link configuration. Therefore, it is advantageous in terms of cost when implementing the present invention.

According to the sixth aspect of the invention, during the test, the gear under test 20 rotates at the same rotational speed and rotational direction and the same phase of the peaks and valleys of the teeth as when rotating while meshing with the reference gear 1. Therefore, even if the reference gear 1 and the test gear 20 are brought close to each other, the meshing state is smoothly achieved, so that there is no time loss as in the related art, and it is possible to avoid the abutting of both tooth surfaces. 1 can extend the replacement life.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view and a plan view showing a gear testing apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a guide post portion of FIG.

3A is a state diagram before starting a test, FIG. 3B is a state diagram with a gear to be tested mounted, and FIG. 3C is a state diagram during a test in the embodiment of FIG.

FIG. 4 is a sectional view and a plan view showing a conventional gear testing device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reference gear 2 fixed shaft 3 distance sensor 4 rocking table 5 spring 6 cylinder 7 drive motor 8 gear 9 gear 10 gear 11 gear 12 link 13 link 14 link 15 fixed base 16 displacement sensor 17 actuator 18 guide post receiver 19 telescopic pin Reference Signs List 20 gear to be tested 21 guide post 22 arithmetic storage device 23 base 30 reference gear 31 fixed shaft 32 swing table 33 cylinder 34 drive motor 35 distance sensor 36 fixed base 37 displacement sensor 38 gear to be tested 39 guide post 40 arithmetic storage device A reference Gear support drive means B Measured gear support means C Measurement means D Synchronization means

Claims (6)

[Claims] 1. The reference gear and the test gear are urged in a direction approaching each other and engaged with each other to rotate while the reference gear and the test gear are relatively movable in a direction in which the reference gear and the test gear are moved toward and away from each other. In a gear testing apparatus that tests the strain of the gear under test by measuring a change in the center-to-center distance between the reference gear and the gear under test, when testing the gear under test, Before bringing the gear under test close to and meshing with the gear under test, the reference gear and the gear under test are synchronized with the phase of the reference gear and the phase of the gear under test so that their peaks and valleys mesh with each other. A gear testing device comprising a synchronization means for rotating. A first gear that is arranged coaxially with the reference gear and rotates integrally with the reference gear; and a synchronous gear that is arranged coaxially with the gear to be tested, and A second gear capable of rotating integrally with the gear; an even number of third gears arranged to transmit rotation between the first gear and the second gear; In a state where the third gear is meshed with each other, supporting means for supporting the first to third gears so that the first gear and the second gear are slidably movable in a direction of coming and coming from each other. 2. The method according to claim 1, wherein the first to third gears transmit rotation by synchronizing a phase of the reference gear and a phase of the test gear with each other in a state where peaks and valleys mesh with each other. Gear testing equipment. 3. The first gear is a gear having the same number of teeth as the reference gear, the second gear is a gear having the same number of teeth as the test gear, and the third gear is a first gear. 3. The gear according to claim 2, wherein the gear meshes with the second gear and the gear meshes with both the gear and the second gear, and the two third gears have the same number of teeth. Testing equipment. 4. The second gear has the same number of teeth as the gear to be tested, and a shaft portion is provided coaxially with the second gear to rotatably and detachably support the gear to be tested. 4. The gear testing device according to claim 2, further comprising a test gear synchronizing means for synchronizing the phase of the test gear to be mounted and the phase of the second gear so that the positions of the valleys overlap each other. 5. The supporting means has a plurality of link pieces for rotatably supporting two gears meshing with each other in the first to third gears, and each link piece is simultaneously attached to the two link pieces. The gear testing device according to any one of claims 2 to 4, further comprising a link mechanism rotatably connected to a supported gear at the center of rotation. 6. A gear testing method using the gear testing device according to claim 1, wherein the reference gear and the test gear are biased in a direction approaching each other to engage. In the combined state, by measuring the variation of the center-to-center distance between the reference gear and the gear under test, when testing the strain of the gear under test, both the reference gear and the gear under test rotate. State, the phase of the reference gear and the phase of the test gear are synchronized so that peaks and valleys mesh with each other, and then the reference gear and the test gear are brought close to each other and meshed. Gear test method.