JPH0453563Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a jig for measuring meshing of bevel gears.

(Prior art) When forging bevel gears, the forging die wears out as the forging is repeated many times.
As a result of this mold wear, the dimensions of the forged bevel gear deviate from the standard dimensions, resulting in problems such as teeth becoming thicker.

Therefore, when forging bevel gears, it is necessary to replace the forging die before the die wears out and the dimensions of the forged bevel gear product fall outside of the allowable range.

Conventionally, the timing for replacing such a forging mold has been determined by, for example, sampling and inspecting a forged bevel gear, that is, forming a shaft hole in the extracted bevel gear forging by machining, and inserting a support shaft into the shaft hole. The forged product is supported by a support shaft, a standard meshing gear that should mesh with the forged product is meshed with the forged product, one is fixed and the other is rotated, and the amount of backlash (rotation amount) corresponding to the amount of backlash at that time is determined. This was determined by measuring the amount of play and determining how much the dimensions of the forged bevel gear deviated from the standard dimensions, or in other words, how much the die was worn. .

(Problems to be solved by the invention) However, in the method described above, in which a shaft hole is formed in a forged bevel gear and the mesh is measured by supporting the shaft hole through the shaft hole, the measurement results ( The amount of backlash) varies not only depending on the external dimensions of the forged bevel gear itself, but also on the machining accuracy of the shaft hole formed by the above-mentioned machining, and therefore there is a problem that the measurement accuracy is not always sufficiently high. Ta.

In addition, if the dimensions of the bevel gear forged product exceed the allowable range as a result of measurement, the forged product will be discarded, but in that case, the shaft hole forming process performed on the forged product may be unnecessary. There was also the problem that it became

In view of the above circumstances, the purpose of the present invention is to provide a gear that can perform meshing measurement without machining the shaft hole, thereby improving measurement accuracy and eliminating the need for extra shaft hole forming processing. The purpose of this invention is to provide a jig for measuring meshing.

(Means for Solving the Problems) In order to achieve the above object, the gear mesh measurement jig according to the present invention has a tooth receiving part that receives the tooth part of the bevel gear that is the object to be measured. a bevel gear receiving member in which a notch portion for exposing a part of the tooth portion of the bevel gear is formed in the receiving portion; and the bevel gear having the tooth portion received in the tooth receiving portion of the receiving member; and a holding means for holding the bevel gear through the teeth in the receiving member, and meshing the bevel gear held by the receiving member with a reference meshing gear to be meshed with the bevel gear in a notch of the receiving member to measure meshing. It is characterized by being configured to perform the following.

(Function) According to the meshing measurement jig, the bevel gear is held by the bevel gear receiving member via its teeth,
Therefore, it is not necessary to form a conventional shaft hole to hold the bevel gear, and since the bevel gear receiving member is provided with a notch that exposes a part of the teeth of the bevel gear, The reference meshing gear can be meshed with this notch, and therefore meshing of the bevel gear forged product can be measured without machining a shaft hole in the forged product.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of an embodiment of the measuring jig according to the present invention, and FIGS. 2 and 3 are -
FIG. 3 is a line and -line sectional view.

The illustrated measurement jig includes a bevel gear receiving member 12 that receives a tooth portion 10a of a forged bevel gear 10 that is an object to be measured, and a bevel gear receiving member 12 that receives the bevel gear 10 with its tooth portion 10a. and a holding means 14 for holding the toothed portion 1 on the receiving member 12.
The meshing measurement is performed by meshing the bevel gear 10 held via the bevel gear 0a with the reference meshing gear 16 that should mesh with the bevel gear 10.

The bevel gear bearing member 12 is attached to a rod member 18, and the rod member 18 has a central axis 18 thereof.
It is mounted on a moving block 20 so as to be rotatable around a, and the moving block 20 is mounted along a guide rail 24 provided on a base 22 and extending in the X-axis direction (the same direction as the central axis 18a of the rod member). It is placed on the base 22 so as to be movable in the X-axis direction.

The bevel gear receiving member 12 has a tooth receiving portion 12a for receiving the tooth portion 10a of the bevel gear on the side opposite to the positioning set member 26 described below, that is, the right end in FIG. Receiving part 1
A notch 12b is formed in 2a to expose a part of the tooth 10a of the bevel gear for meshing with the reference meshing gear 16. The above tooth receiving part 1
2a is a large number of gears in which the teeth 64a and the back spherical surface 64b on the opposite side of the teeth mesh in a predetermined state with the teeth of a reference bevel gear 64 (see FIGS. 6 and 8) formed to the standard dimensions of a forged bevel gear. The cutout portion 12b is formed by cutting out a portion facing the reference meshing gear 16 into a fan shape as shown by arrow A, as shown in FIG. The cutout portion 12b may be of any type as long as it exposes the tooth portion 10a of the bevel gear and allows the tooth portion 10a and the reference meshing gear 16 to mesh there.

Further, the bevel gear receiving member 12 includes a collet member (expansion member) that holds the reference bevel gear 64 in a state in which its tooth portion 64a is meshed with the tooth receiving portion 12a of the bevel gear receiving member in the predetermined state. 28 is removably provided.

The holding means 14 holds the bevel gear 10 with respect to the bevel gear receiving member 12 and the tooth portion 10a with respect to the tooth receiving portion 12.
a, that is, both parts 10a and 12
Any gear may be used as long as it can hold the bevel gear 1 in a securely abutting state with the bevel gear 1 as shown in FIG.
0 toward the bevel gear receiving member 12 from the surface opposite to the toothed portion 10a and holding it in the receiving member 12; a female thread member 14b that screws with the pressure screw 14a; and the female thread member. The female screw member 14b is provided in a direction in which the press screw 14a screwed together moves in the X-axis direction when the press screw 14a is rotated. Holding arm 1
4c has its base end removably attached to the bevel gear receiving member 12.

On the side facing the bevel gear receiving member 12, that is, on the right side in FIG.
The positioning set member 26 is attached to a rod member 30, and the rod member 30 is attached to a moving block 32 so as to be rotatable around a central axis 30a extending in the X-axis direction. It is placed on the base 22 so as to be movable in the X-axis direction along the guide rails 24.

This positioning set member 24 has a concave spherical surface 26a on the side facing the bevel gear receiving member 12. This spherical surface 26a coincides with the back spherical surface 64b formed on the side opposite to the teeth of the reference bevel gear. Further, the positioning set member 26
A collet member (extension member) 36 for holding a zero point set master 62, which will be described below, is removably attached to the.

A reference meshing gear bearing member 38 for receiving the reference meshing gear 16 is provided so as to be movable in the Y-axis direction orthogonal to the X-axis direction. This receiving member 3
8 has a concave spherical surface 38a that matches the back spherical surface 16a of the reference meshing gear 16, and is attached to a rod member 40, which is rotatably attached to a moving block 42 around a central axis 40a extending in the Y-axis direction. The moving block 42 is placed on the base 22 so as to be movable in the Y-axis direction along a guide rail 44 extending in the Y-axis direction.
Further, this receiving member 38 is a collect member (expansion member) for holding the reference meshing gear 16 in a state where its back spherical surface 16a is in contact with the concave spherical surface 38a.
46 is removably attached.

In addition, for each of the above-mentioned moving blocks 20, 32, 42, each of those moving blocks 20, 32,
Stopper 4 of the same structure regulates the position of 42
8, 50, 52 and each moving block 20, 32, 4
Fixing bolts 54, 5 that fix 2 so that they do not move
6, 58 are provided.

Next, a method for measuring engagement using the above measuring jig will be explained.

First, the meshing zero point between the reference meshing gear side and the bevel gear side is set.

First, the bevel gear receiver member 12 is moved to the left in FIG. 1, and the zero point set masters 60 and 62 shown in FIGS.
6 and 36, move both members 38 and 26 forward in the Y-axis and X-axis directions (lower side in the Y-axis direction and left side in the X-axis direction in FIG. Both zero point set masters 60 and 62 are brought into contact with each other in the state shown in FIG. Then, with the masters 60, 62 in contact with each other, the tips 52a of the stoppers 52, 50,
50a is brought into contact with the moving blocks 42, 32, and the respective screws 52b (the screws of the stopper 50 are not shown) are tightened to fix both the stoppers 52, 50. After fixing both stoppers, move the moving blocks 42, 32 backward, remove the 0-point set master 60 from the reference meshing gear receiving member 38, and take out the collet member 36 and the 0-point set master 62 from the positioning set member 26. .

Next, from the bevel gear receiving member 12 to the holding means 1
4 is removed, and a reference bevel gear 64 shown in FIG. , the moving block 32 is fixed in that position with the fixing screw 56, and then the bevel gear receiving member 1 is
2 forward (to the right in the X-axis direction in Figure 1)
As shown in the figure, the back spherical surface 64b of the reference bevel gear is brought into contact with the concave spherical surface 26a of the positioning set member,
In this state, the tip 48a of the stopper 48 is brought into contact with the moving block 20, and the screw 48b is tightened to fix the stopper 48.

By the above operations, the meshing zero point setting on the reference meshing gear side and the meshing zero point setting on the bevel gear side are completed. When this setting is completed, the fixing bolt 56 is loosened, the positioning setting member 26 is moved back, and preparations are made for meshing measurement. That is, the reference meshing gear 16 is attached to the reference meshing gear receiving member 38 using the collet member 46, the moving block 42 is moved forward to abut against the stopper 52, and the moving block 42 is fixed at that position with the fixing bolt 58. Fix it. Further, the collet member 28 and the reference bevel gear 64 are removed from the bevel gear receiving member 12, and the holding means 14 is attached to the receiving member 12, and the moving block 20 of the receiving member 12 is advanced to come into contact with the stopper 48, and the At this position, the moving block 20 is fixed with a fixing bolt 54.

When the preparation for measurement is completed as described above, as shown in FIG.
a is received by the tooth receiving part 12a of the bevel gear receiving member,
The pressing screw 14a of the holding means presses the bevel gear 10 from its back surface 10b to hold it in the bevel gear receiving member 12, and as shown in FIG. 10
a is meshed with the reference meshing gear 16, and the reference meshing gear 16 is fixed and the bevel gear 10
The rod member 18 is rotated integrally with the bevel gear receiving member 12 and the holding means 14, and the amount of rotation (the amount of backlash corresponding to the backlash amount) at that time is measured with a dial gauge or the like.

The tooth thickness of a forged bevel gear changes as the forging die wears down, and the greater the die wear, the thicker the teeth become. Therefore, when the bevel gear 10 is held by the bevel gear receiving member 12 via the teeth, the greater the die wear, the more the bevel gear 10 is held by the bevel gear receiving member 12.
As a result, the bevel gear 10 meshes with the reference meshing gear 16 at a position further away from the reference meshing gear 16, as can be easily understood from FIG. 1. As a result, the amount of rotation (play amount) of the bevel gear 10 increases. Therefore, the dimensional accuracy of the bevel gear 10 and the degree of die wear can be investigated based on the amount of backlash.

(Effects of the invention) As described above, the gear mesh measurement jig according to the present invention holds the bevel gear as the object to be measured in the bevel gear receiving member through its teeth, and the bevel gear receiving member A notch is provided in the bevel gear to expose a part of the teeth of the bevel gear, and the meshing measurement is performed by meshing the bevel gear with the reference meshing gear in the exposed part. There is no need to process and form shaft holes on gears.
Therefore, it is possible to prevent a decrease in measurement accuracy due to the machining accuracy of the shaft hole, and also to solve the problem of redundant shaft hole machining.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the gear engagement measuring jig according to the present invention, FIGS. 2 and 3 are sectional views taken along lines - and -, respectively, in FIG. 1, and FIGS. 4 and 5. The figures are a sectional view of the 0-point set master, Fig. 6 is a sectional view of the reference bevel gear, Figs. 7 and 8 are plan views showing the 0-point setting method, and Fig. 9 is a sectional view of the bevel gear to be measured. It is a sectional view showing a state where it is attached to a gear bearing member. 10...Bevel gear, 10a...Tooth section, 12...
Bevel gear bearing member, 12a...Tooth bearing part, 12b...
Notch portion, 14... Holding means, 16... Reference meshing gear.

Claims (1)

[Scope of Claim for Utility Model Registration] A jig for measuring meshing of bevel gears, which has a tooth receiving part for receiving the teeth of the bevel gear, and the tooth receiving part has one of the teeth of the bevel gear. a bevel gear receiving member in which a notch portion is formed to expose the bevel gear receiving member; and a holding means for holding the bevel gear, the tooth portion of which is received in the tooth receiving portion of the bevel gear receiving member, in the bevel gear receiving member. , The meshing of the bevel gear is measured by meshing the bevel gear held in the bevel gear receiving member with a reference meshing gear to be meshed with the bevel gear in the notch of the bevel gear receiving member. A jig for measuring meshing of gears.