JP4285965B2 - Bent bevel gear automatic meshing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a curved bevel gear automatic meshing method, and more particularly to a curved bevel gear automatic meshing method of automatically meshing one gear and the other gear of a curved bevel gear.
[0002]
[Prior art]
Spur gears and straight bevel gears can be engaged with each other only by making the gears approach each other linearly. Conventionally, various automatic meshing devices for automatically meshing gears or gear materials and gear-type tools have been proposed and known (see, for example, Patent Document 1).
[0003]
On the other hand, curved bevel gears such as hypoid gears used in automobile final gears, for example, have both tooth shapes and tooth traces twisted in both directions, so that one gear rotates according to the twist to mesh the gears. It is necessary to approach the other gear while making it. Further, since the twist angle of the bent bevel gear is different between the start of meshing and the completely meshed state, the amount of rotation according to the twist is not constant according to the approach distance.
[0004]
Thus, the bent bevel gear has a special tooth shape and requires a complicated movement for meshing. As a typical method for automatically meshing a conventional bevel gear, two types of methods, a forced meshing method and a retry / rotation method, have been adopted.
[0005]
The forced meshing method is a method of forcibly meshing one gear that is rotatably supported by making the other gear linearly approach while rotating at a constant rotational speed and pressing it as it is.
[0006]
The retry / spinning method is a method in which one gear that is rotatably supported and the other gear that is rotatably supported are brought close to each other and the gear teeth contact each other. Separating, rotating one gear by an arbitrary rotation angle, approaching again, repeating the above operation until the tooth tip of one gear is located at the meshing start position located between the tooth tips of the other gear, After being placed at the meshing start position, the gears are brought close to each other in a straight line so that the other gear is forcibly rotated by one gear and rotated to a fully meshed state, so that it is completely meshed. It is a method to match.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-79422 (FIG. 10)
[0008]
[Problems to be solved by the invention]
However, in the case of the forced meshing method, the tooth tips of the gears may come into contact with each other when meshing. In addition, the tooth tip of one gear may come into contact with the tooth surface of the other gear. Therefore, there is a concern about the deformation or breakage of the tooth tip and the generation of scratches or dents on the tooth surface. In particular, when the meshing gear is a gear material before quenching, deformation, scratches, dents and the like are easily generated.
[0009]
Further, in the case of the retry / carrying method, the gears are forcibly rotated and meshed with each other, so that the tooth surfaces of the gears are rubbed with a high contact surface pressure, and the tooth surfaces may be damaged. Such deformation of the tooth tip of the gear, flaws on the tooth surface, dents, and the like cause abnormal noise, vibration, and uneven wear.
[0010]
The present invention has been made in view of the above-described points, and an object of the present invention is to provide a bent tooth bevel gear automatic meshing method that can be easily meshed without damaging the bent bevel gear.
[0011]
[Means for Solving the Problems]
The curved bevel gear automatic meshing method according to the first aspect of the present invention made in view of the above points is a first method for rotatably supporting the first master gear and the second master gear of the curved bevel gear train in the meshed state. Moving the first master gear in a direction away from the second master gear in a state in which the rotation of the first master gear is restricted, and the movement distance in the separation direction of the first master gear, and the disengagement by the movement A second step of continuously storing the relationship between the rotation angle position of the second master gear that rotates in the rotation direction, and the rotation after the first master gear meshing release that is the rotation angle position of the first master gear after meshing release; A third step for storing a rotation angle difference from the angular position to a preset first master gear reference rotation angle position as a first master gear rotation angle difference. And the second master gear rotation angle difference from the rotation angle position after the second master gear meshing release that is the rotation angle position of the second master gear after the mesh release to the preset second master gear reference rotation angle position. And a fourth step stored as, and a first pre-polishing gear having the same shape as the first master gear and a second pre-polishing gear having the same shape as the second master gear are rotatably supported in a disengaged state. And a sixth step of rotating the first pre-polishing gear from the first master gear reference rotation angle position by the first master gear rotation angle difference and disposing it at the rotation angle position after releasing the first master gear meshing; The second pre-polishing gear is rotated by the second master gear rotation angle difference from the second master gear reference rotation angle position to engage with the second master gear. Based on the seventh step arranged at the rotation angle position after the removal and the information stored in the teaching process, the first pre-polishing gear is moved in the direction approaching the second pre-polishing gear, and the second polishing is performed. And a meshing stroke comprising an eighth step of meshing the first pre-polishing gear and the second pre-grinding gear by rotating the front gear in the meshing rotation direction .
[0012]
According to the present invention, bend when engaging the bevel gear, the first polishing front gear and the second polishing front gear or contact tooth tips to each other, one of the pre-polishing gear tooth tip and the other pre-polishing gear It is possible to mesh without contacting the tooth surface. Therefore, it is possible to prevent the tooth tip from being deformed or broken, and the tooth surface from being scratched or dented at the time of meshing.
[0014]
According to the present invention, since the first master gear is moved away from the second master gear in a state where the rotation of the first master gear is restricted, the relative movement distance between the first master gear and the second master gear is The relative rotation angle position of the second master gear with respect to the first master gear can be easily obtained with high accuracy.
[0015]
The invention of claim 2 is the bevel gear automatic engagement process bend according to claim 1, between the seventh step and the eighth step, the second polishing front gear second Masutagiya disengaged after the rotation angular position Rotate toward the mesh release rotation direction by a predetermined minute rotation angle from the first to start the second pre-polishing gear meshing to form a predetermined gap between the tooth surfaces of the first pre-grinding gear and the second pre-grinding gear A ninth step of arranging at a rotation angle position is provided.
[0016]
According to the present invention, the tooth surfaces of the first pre-polishing gear and the second pre-polishing gear can be engaged with each other from the start of meshing to the fully meshed state without contacting each other or with a very low contact pressure. Therefore, it is possible to prevent the tooth surfaces from being scratched by rubbing the tooth surfaces. Thereby, even if it is the gear before quenching which is easy to get a damage | wound, it can mesh | engage without making a damage | wound.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0018]
In the present embodiment, a case where the bending bevel gear automatic meshing method is used in the transmission error tester 10 of the hypoid gear 1 will be described as an example.
[0019]
FIG. 1 is a top view of the transmission error tester 10, and FIG. 2 is a front view of the transmission error tester 10. The transmission error test machine 10 measures the transmission error between gears by rotating the pinion gear 2 and the ring gear 3 of the hypoid gear 1 in mesh with each other, and has a base 11 extending in the horizontal direction. On the base 11, a pinion gear mounting portion 12 to which the pinion gear 2 of the hypoid gear 1 is mounted is provided. The pinion gear mounting portion 12 includes a first moving table portion 13 that can reciprocate horizontally and horizontally (hereinafter referred to as the X-axis direction) on the base 11 and can be controlled to stop at an arbitrary moving position. The pinion gear 2 provided in the portion 13 is rotatably supported so that its axis extends along the X-axis direction, is rotated coaxially at an arbitrary rotational speed, and can be controlled to stop at an arbitrary rotational angle position. Part 14.
[0020]
In addition to the pinion gear mounting portion 12, a ring gear mounting portion 15 to which the ring gear 3 is mounted is provided on the base 11. The ring gear mounting portion 15 reciprocates on the base 11 in a direction that is horizontal and orthogonal to the X-axis direction (hereinafter referred to as the Y-axis direction), and a second moving table portion 16 that can be controlled to stop at an arbitrary movement position, 2 A third moving table portion 17 provided in the moving table portion 16 and reciprocating in the vertical direction (hereinafter referred to as Z-axis direction) and capable of stopping control at an arbitrary moving position, and a ring gear 3 provided in the third moving table portion 17. Has a ring gear rotation drive unit 18 that is rotatably supported so that its axial center extends along the Y-axis direction, is coaxially rotated at an arbitrary rotational speed, and can be controlled to stop at an arbitrary rotational angle position. .
[0021]
A rotation lock mechanism (not shown) is provided in the ring gear rotation drive unit 18, and the rotation angle position of the ring gear 3 can be fixed by the rotation lock operation of the rotation lock mechanism.
[0022]
Reference numerals 21 and 22 in the figure are detection sensors for detecting the rotational angle positions of the pinion gear 2 and the ring gear 3, respectively.
[0023]
The detection sensor 21 detects whether or not the pinion gear 2 is arranged at a preset pinion gear reference rotation angle position by detecting a tooth tip of the pinion gear 2 attached to the pinion gear attachment portion 12.
[0024]
Further, the detection sensor 22 detects whether or not the ring gear 3 is disposed at a preset ring gear reference rotation angle position by detecting a tooth tip of the ring gear 3 attached to the ring gear attachment portion 15. . As these detection sensors 21 and 22, phototubes are used in this embodiment.
[0025]
In the figure, reference numeral 23 denotes a control panel. The control panel 23 accommodates a power supply device, a motor driver, a control circuit, etc., and movement control of the first moving table unit 13, the second moving table unit 16, and the third moving table unit 17, and pinion gear rotation driving. The control part which performs rotation control of the part 14 and the ring gear rotation drive part 18 is comprised.
[0026]
Next, a method for automatically meshing the hypoid gear 1 realized by each control unit will be described below based on the flowcharts shown in FIGS. First, the relationship between the relative separation distance and the rotational angle position of the pinion gear 2 and the ring gear 3 until the meshing is released by moving the pinion gear 2 and the ring gear 3 that are in a completely meshed state to move away from each other. The teaching process is performed to memorize continuously.
[0027]
First, the pinion gear 2 and the ring gear 3 prepared in advance as master gears are respectively attached to the pinion gear mounting portion 12 and the ring gear mounting portion 15, and are manually moved to the first moving table portion 13, the second moving table portion 16, and the third moving table portion. The pinion gear rotation drive unit 14 and the ring gear rotation drive unit 18 are rotated and moved so as to be completely engaged with each other (FIG. 3A), and the first movement table unit 13 and the second movement table are moved. The moving position of the part 16, the third moving table part 17, and the rotational angle position of the pinion gear rotation driving part 14 and the ring gear rotation driving part 18 are stored (first step).
[0028]
Next, the ring gear 3 is locked to restrict its movement in the rotation direction and the pinion gear 2 is allowed to rotate, and the second movement table portion 16 moves the ring gear 3 away from the pinion gear 2 (FIG. 3). (B)). By this movement, the pinion gear 2 is guided by the tooth surface of the ring gear 3, rotates in the meshing release rotation direction according to the moving distance of the ring gear 3, and is rotated by releasing the meshing with the ring gear 3. Is stopped (FIG. 3C).
[0029]
The relationship between the movement distance of the ring gear 3 from the state in which the pinion gear 2 and the ring gear 3 are completely engaged to the start of engagement and the rotation angle position of the pinion gear 2 that is rotated in the engagement release direction by the movement is continuously stored. . Further, the movement position of the second moving table unit 16 at the time of mesh release is stored as “mesh start movement position”, and the rotation angle position of the rotation drive unit of the pinion gear 2 is stored as “rotation angle position after pinion gear mesh release”. (Second step).
[0030]
Next, the ring gear 3 is moved to a standby position further away from the pinion gear 2, and the rotational angle positions of the pinion gear 2 and the ring gear 3 are scanned (FIG. 3 (d)). First, the pinion gear 2 is rotated in a preset rotation direction (counterclockwise in the drawing), and the “pinion gear 2”, which is a reference rotation angle position of the pinion gear 2 set in advance from “the rotation angle position after releasing the pinion gear meshing”. Rotate to “reference rotation angle position” (right side in FIG. 3E)). The detection of the pinion gear reference rotation angle position is performed by detecting the tooth tip of the pinion gear 2 by the detection sensor 21. Then, the rotation angle difference from “the rotation angle position after releasing the pinion gear meshing” to the “pinion gear reference rotation angle position” is stored as the pinion gear rotation angle difference (ΔA1) (third step).
[0031]
Further, the ring gear 3 is also rotated in a preset rotation direction (clockwise in the figure), and is preset from a “rotation angle position after releasing the ring gear meshing” which is a rotation angle position of the ring gear 3 after the meshing release. The ring gear 3 is rotated to the “ring gear reference rotation angle position” which is the reference rotation angle position (left side in FIG. 3E). The “ring gear reference rotation angle position” is detected by detecting the tooth tip of the ring gear 3 by the detection sensor 22. Then, the rotation angle difference from the “rotation angle position after releasing the ring gear meshing” to the “ring gear reference rotation angle position” is stored as the ring gear rotation angle difference (ΔB1) (fourth step). The teaching process is completed by the above first to fourth steps.
[0032]
Next, a description will be given of a meshing process in which the pinion gear 2 and the ring gear 3 are automatically meshed based on the information stored in the teaching process. First, an unpolished pinion gear 2 and a ring gear 3 having the same shape as the master are prepared and attached to the pinion gear mounting portion 12 and the ring gear mounting portion 15 in the retracted position, respectively (FIG. 4 (a)). 5 steps).
[0033]
Then, the pinion gear 2 and the ring gear 3 are respectively rotated and arranged at “pinion gear reference rotation angle position” and “ring gear reference rotation angle position” based on the detection signals of the detection sensors 21 and 22 (FIG. 4B). ).
[0034]
Then, the ring gear 3 is rotated counterclockwise by the ring gear rotation angle difference (ΔB1) from the “ring gear reference rotation angle position”, and the rotation angle position of the ring gear 3 is arranged at the “rotation angle position after releasing the ring gear meshing” ( (Left side in FIG. 4C) (sixth step).
[0035]
Then, the pinion gear 2 is rotated clockwise from the “pinion gear reference rotation angle position” by the pinion gear rotation angle difference (ΔA1), and the rotation angle position of the pinion gear 2 is arranged at “the rotation angle position after releasing the pinion gear meshing”. (Seventh step).
[0036]
Further, in the present embodiment, the rotation angle position of the pinion gear 2 is arranged at a “pinion gear meshing start rotation angle position” rotated clockwise from the “pinion gear reference rotation angle position” by a preset small rotation angle α. (Right side in FIG. 4C) (9th step). The minute rotation angle α is set to a value that forms a slight gap between the tooth surface of the pinion gear 2 and the tooth surface of the ring gear 3 in the meshed state.
[0037]
Next, the second moving table unit 16 is moved to the “meshing start moving position” (FIG. 4D), and the meshing operation for meshing the pinion gear 2 and the ring gear 3 is started. Here, based on the relationship between the separation distance and the rotation angle position of the pinion gear 2 and the ring gear 3 stored in the teaching stroke, the ring gear 3 is moved in the direction approaching the pinion gear 2 and the pinion gear 2 is rotated in the meshing rotation direction ( FIG. 4 (e)). And it arrange | positions in the state meshed | engaged completely, and meshing operation is completed (FIG.4 (f)) (8th step).
[0038]
According to the automatic meshing method of the pinion gear 2 and the ring gear 3 of the hypoid gear 1 described above, the pinion gear 2 and the ring gear 3 can be connected to each other or without the tooth tips of one gear coming into contact with the tooth surfaces of the other gear. Can be completely meshed. Therefore, it is possible to prevent the tooth tip from being deformed or broken, and the tooth surface from being scratched or dented at the time of meshing.
[0039]
Further, by starting the meshing operation from the “pinion gear meshing start rotational angle position” that is rotated by the minute rotational angle α from the “pinion gear reference rotational angle position”, the pinion gear 2 and the ring gear 3 from the meshing start to the fully meshed state. The tooth surfaces can be engaged with each other without bringing them into contact with each other or with extremely low contact pressure. Accordingly, the tooth surfaces can be prevented from being scratched by rubbing the tooth surfaces, and can be engaged with each other without scratching even before polishing or quenching, which is particularly likely to be scratched.
[0040]
Further, in the present embodiment, the photosensors are used for the detection sensors 21 and 22, and the rotational angle positions of the pinion gear 2 and the ring gear 3 are detected in a non-contact manner. Compared with the conventional method in which the pin is abutted and the rotational angle position is forcibly aligned, the tooth surface can be prevented from being damaged.
[0041]
In addition, this invention is not limited to the above-mentioned embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in the above-described embodiment, the case where a hypoid gear that is a staggered shaft gear is used as an example of a bent bevel gear train to be meshed, but a spiral bevel gear that is a cross shaft gear may be used.
[0042]
In the above-described embodiment, the case where the ring gear 3 is locked in the rotational direction and moved in the axial direction and the pinion gear 2 is rotatably supported has been described as an example. However, for example, the pinion gear 2 is moved in the axial direction. Various other combinations are possible.
[0043]
【The invention's effect】
As described above, according to the automatic meshing method of the bent bevel gear according to the present invention, when the curved bevel gear is meshed, the contact between the tooth tips of the first gear and the second gear, The gear teeth can be meshed without contacting the tooth surface of the other gear. Therefore, it is possible to prevent the tooth tip from being deformed or broken, and the tooth surface from being scratched or dented at the time of meshing.
[Brief description of the drawings]
FIG. 1 is a top view of a transmission error testing machine.
FIG. 2 is a front view of a transmission error tester.
FIG. 3 is a flowchart illustrating a teaching process.
FIG. 4 is a flowchart illustrating an engagement process.
[Explanation of symbols]
1 Hypoid gear (curved bevel gear train)
2 Pinion gear 3 Ring gear 10 Transmission error tester 11 Base 12 Pinion gear mounting portion 13 First moving table portion 14 Pinion gear rotation driving portion 15 Ring gear mounting portion 16 Second moving table portion 17 Third moving table portion 18 Ring gear rotation driving portion 21 Detection Sensor 22 Detection sensor

Claims (2)

A first step of rotatably supporting a first master gear and a second master gear of a bent tooth bevel gear train in mesh;
While the rotation of the first master gear is restricted, the first master gear is moved in a direction away from the second master gear, and the movement distance in the separation direction of the first master gear and in the meshing release rotation direction by the movement. A second step of continuously storing the relationship with the rotation angle position of the second master gear that rotates with the second master gear;
The rotation angle difference from the rotation angle position after disengagement of the first master gear, which is the rotation angle position of the first master gear after disengagement, to the preset first master gear reference rotation angle position is stored as the first master gear rotation angle difference. And a third step
The rotation angle difference from the rotation angle position after releasing the second master gear, which is the rotation angle position of the second master gear after releasing the mesh, to the preset second master gear reference rotation angle position is stored as the second master gear rotation angle difference. A teaching process consisting of a fourth step,
A fifth step of rotatably supporting a first pre-polishing gear having the same shape as the first master gear and a second pre-polishing gear having the same shape as the second master gear in a disengaged state;
A sixth step of rotating the first pre-polishing gear by the first master gear rotation angle difference from the first master gear reference rotation angle position and disposing it at the rotation angle position after releasing the first master gear engagement;
A seventh step of rotating the second pre-polishing gear by the second master gear rotation angle difference from the second master gear reference rotation angle position and disposing the second master gear meshing release rotation angle position;
Based on the information stored in the teaching step, the first pre-polishing gear is moved in a direction approaching the second pre-polishing gear, and the second pre-polishing gear is rotated in the meshing rotation direction to move the first pre-polishing gear. An automatic meshing method of a bent tooth bevel gear , characterized by comprising a meshing step comprising a pre-polishing gear and an eighth step of meshing the second pre-polishing gear . Between the seventh step and the eighth step,
The first pre-polishing gear and the second pre-polishing gear are rotated from the second master gear meshing-released rotation angle position by a preset minute rotation angle toward the meshing-release rotation direction. The method of claim 1 , further comprising a ninth step of disposing a second pre-polishing gear meshing start rotation angle position that forms a predetermined gap between the tooth surfaces of the gear. .

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