JPS60201201A - Deciding device for pitch of gear - Google Patents

Abstract

PURPOSE:To automate decision making operation and to shorten its time by fitting a claw part in a tooth groove of a gear which is supported at a specific position rotatably around its axis, and extruding the gear from the stand-by position and detecting the movement extent of a measuring head which abuts on both flank parts of the tooth groove. CONSTITUTION:A guide cylinder 12 is elevated through the driving of a cylinder 16 together with a measuring head shaft 15, and a work 7 is placed on a temporary receiving table 8 and the claw part 14b of a rotation stopper head 14 is fitted in a tooth groove 9a of the gear 9. Then, the cylinder 16 is driven continuously to elevate and stop the guide cylinder 12, but the measuring head shaft 15 is elevated against the energizing force of a spring member 20 and the measuring head 15a abuts on both flanks of the tooth groove 9a. The up/down rod 17a of a dial gauge 17 is pressed down until a contact 17b provided to its lower end abuts on a contact 19a provided to the tip of a contact support piece 19 to measure the movement extent of the measuring head 15a between said abutting position and initial stand-by position, and a decision on the pitch is made on the basis of the movement extent to detect the kind of the gear.

Description

[Detailed Description of the Invention] This invention relates to a device that detects both types of vehicles by determining the pitch of gears. For example, by meshing a manufactured work gear with one gear and rotating it in a driven manner, it is possible to detect the presence or absence of bruises, etc. It is used to select workpiece gears that are compatible with both vehicle types during meshing tests and the like.

B. Conventional technology Conventionally, the two types of vehicles can be distinguished by the tooth thickness method, which measures the maximum tooth thickness of several peaks with a tooth thickness micrometer, or by inserting a roller into the tooth groove from both sides in the radial direction of the gear. It was common for workers to measure the dimensions by themselves using the roller method, which measures the diameter, and make judgments based on the results.

By the way, in the gear meshing test process, the time required for one cycle of inspection due to the meshing between the workpiece gear and the master gear is extremely short compared to other processes in manufacturing the workpiece gear and processing and assembling various products using it. From the viewpoint of process efficiency, it is desired to consolidate gear meshing tests with different specifications to eliminate surplus time in the process.

However, in order to perform an anastomosis test on workpiece gears with different specifications, it is necessary to select a master gear corresponding to each gear pole. There was a problem in that the advantages of centralization could not be taken advantage of because it required

On the other hand, although there is no problem with the above-mentioned vehicle type discrimination means in terms of measurement accuracy, there is a drawback that the relationship between the center runout of the tooth portion with respect to the axial center of the gear cannot be measured.

Purpose of the Invention This invention enables the integration of gear meshing tests with different specifications by automating gear type discrimination and performing it in a short time.
In addition to increasing the processing and assembly efficiency of various products that use workpiece gears, for example, multiple types of master gears used in the above-mentioned meshing tests are placed in a rotary index system so that each gear pole can be matched in advance. The purpose is to reduce the number of machines and equipment costs.

C0 Structure of the Invention The present invention includes a holding mechanism that rotatably supports a gear in a fixed position around its axis; a gear rotation stopping mechanism that prevents rotation by fitting a pawl into a tooth groove of the supported gear; A measuring head that extends from a standby position, enters a tooth groove of a gear whose rotation is blocked, and abuts both side surfaces of the tooth groove, and means for detecting the amount of movement of the measuring head from the standby position to the contact position. The present invention relates to a gear pitch discrimination device comprising a gear pitch determination device.

2. Example Figures 1 and 2 show a gear meshing tester, and the mount (1
) A workpiece pedestal (2) installed in a loss-slide manner that can slide freely in both front and rear and left and right directions is placed in the front center part of the top of A stand (3) (3) is provided, and a workpiece stand (
Behind 2) is a master gear drive device (4) with a master gear (not shown) mounted in a rotary index system.
and a master gear positioning device (5) for moving this to a desired position, and a tooth thickness propriety indicator (6) is also provided at the top.

As shown in FIG. 3, two temporary supports (8) (8) are erected on the upper part of the workpiece support (2) to support the workpiece (7) at its shaft (7n). As shown in Fig. 4, a V-shaped temporary support seat (8a) is formed at the upper end of each temporary support stand (8) to temporarily support the workpiece (7) in a horizontal state.
When the workpiece (7) is supported at each center (3a) of both tailstocks (3) (3) at the axial center of the end of the shaft (7a), the temporary support (8a) The height is set so that the workpiece (7) floats above the temporary receiving seat (8a) as shown by the one-dot chain line. Therefore, a pitch discrimination device (10) is installed on the workpiece pedestal (2), located directly below the gear (9) of the soak (7) placed on the temporary pedestal (8). There is.

NS5'C! As shown by J, the pitch discrimination device (1
0) is a guide tube (12) that vertically slidably passes through an annular mount (11) fitted and fixed to the upper plate (2a) of the workpiece pedestal (2), and the guide ffj (12). A rotation stopper head (14) is attached via a support member (13) fitted and fixed to the upper end, and a rotation stopper head (14) is slidably passed through the guide tube (1z) and the support member (13) in the vertical direction, and is attached to the upper end. A measuring head shaft (15) to which a substantially spherical measuring head (15a) is fixed, a cylinder (16) for raising and lowering the measuring head shaft (15) and a guide cylinder (12), and an upper plate (3).
Dial gauge with electrical contacts (17
). However, the guide tube (12)
Surrounding this at the bottom is a cylindrical sliding guide (18
) is prevented from rotating via a key (12a) that fits into a vertical keyway (18a) provided on the inner surface of the measuring head iP+11 (15), and is connected to the base of a contact support piece (19) fixed to the lower end of the measuring head iP+11 (15). The measurement head shaft (15) is biased in the direction of upward protrusion by the stored force of the spring member (20) attached between the measurement head and the measurement head shaft (15). The rotation stopper head (14) is formed into a substantially truncated cone shape as shown in FIG. (14b) (14b), the central protrusion (13a) of the support member (13) is fitted into the inner recess <14C) so as to be freely movable, and the support member (13) is inserted through the guide pin (21). (13) is stopped from rotating, and a cushioning spring member (22) is installed between it and the support member (13).
) is the bottom plate fixed to the underside of the mounting base (11) via bolts (23), (24) is a screw for fixing the support member (13) to the guide tube (12), and (25) is the top and bottom of the measurement unit. Non-contact sensor for motion confirmation, (26) is the sensor (25)
), (27) is a cylinder for moving the workpiece pedestal (2) in the left-right direction, and (28) is a sensor for confirming the fitting of the claw portion (14b) of the rotation stopper head (14).

In the above configuration, in order to detect the type of gear (9) of the workpiece (7), the guide cylinder (12) is first raised together with the measuring head shaft (15) by driving the cylinder (16), and then As shown (Place the workpiece (7) on the temporary holder (8) a)
At the same time as R, the claw part (14b) of the rotation stop head (14)
(14b) is fitted into the gear wheel 9a) of the gear (9).

Note that the width and slope of both sides of the claw portion (14b) are set so that the claw portion (14b) does not reach the bottom of the tooth AM (9a).
9) Rotation is prevented by fitting the groove. Next, by driving the cylinder (16), the guide m (
12) stops rising when the claw part (14b) enters, but the measurement-rad shaft (15) rises against the bias of the spring member (20), and the measurement-rad shaft (15a becomes a float). The tooth flj enters the tooth groove (9a) of (9) as shown by the dashed line in Fig. 7.
The amount of movement of the measuring head (15a) between this abutting position and the initial standby position and 9, which abuts both side surfaces of (9a), is
This movement is measured by pressing down the upper and lower ends (17a) of the dial gauge (17) and bringing them into contact with the contact (17b) provided at the lower end and the contact (19a) provided at the tip of the contact support piece (19). It detects both types of vehicles by determining whether the vehicle is in a pinch based on the amount. After determining the pitch, move the workpiece holder (2) from the solid line position in Figure 2 to the dot-dashed line position directly below the Rb pusher (3) (3), and then move the workpiece holder (2) to the center (3a) of the Rb pusher (3) (3). At (3a), the workpiece (7) is rotatably supported around the axis and floated above the temporary support stand (8). After this,
The rotation stop heads (14), (14) and the measuring head shaft (15) are lowered to free the workpiece (7). Master gears corresponding to both of the detected vehicle types are then selected and a meshing test is performed. Note that the term "pitch" here refers to the helix angle, pressure angle, tooth height, etc. of the gears. On the other hand, with the scale of the dial gauge (17), the master gear is selected and the teeth W and amount of the float (9) are measured at the same time, and the tooth thickness indicator (6) indicates whether or not the product is defective.

In the above embodiment, the claw portion (14b) that prevents rotation of the gear (9) is
) is configured to be driven using the vertical movement of the guide tube (12), but other driving methods may be adopted, and the direction in which the measuring head (15a) enters the tooth groove (9a) is determined by the method described above. Various modifications other than the example can be made, and a configuration may be adopted in which the entrance is made from the side or from above. Furthermore, various means for measuring the amount of movement of the measuring head (15a) other than the measuring body dial gauge (17) can be employed. On the other hand, it is also possible to detect the run-out accuracy of the tooth trace by sliding the workpiece (7) or the pitch discriminating device (lO) in the axial direction and performing the measurement several times.

Highly, this invention is applicable not only to the gear (9) formed on the shaft as in the above embodiment, but also to the tailstock (9) even for a gear with a hole.
By adopting a suitable holding member that is supported at the bottom position at the center of the shaft instead of 3), it can be similarly applied to detection of both vehicle types by pitch discrimination. In addition, to improve detection accuracy, pulse%
- It is also possible to carry out the same measurement for a plurality of @grooves for each number of teeth by means such as adding a rotating drive unit. Furthermore, when dealing with helical gears, the pitch can be determined in the same way, and runout of the tooth trace can be measured by mechanically linking the feed in the workpiece axis direction and the divided or continuous entry of the measuring head.

Effects of the Invention According to the gear pitch discrimination device according to the present invention, both vehicle types can be automatically detected in a short time, so it is possible to consolidate gear meshing tests with different specifications, for example. By eliminating unnecessary extra time in the testing process, it is possible to improve the efficiency of gear manufacturing and the processing and assembly of various products. For example, it is possible to install multiple types of master gears used in the above-mentioned meshing test in a rotary index system and immediately adapt to each type of gear, thereby reducing the number of machines and equipment costs. In addition, in this invention, the measuring head enters the tooth groove with the gear supported at the shaft center to measure the amount of movement, so the relationship between the center runout of the southern part of the gear with respect to the shaft center can be measured at the same time. There are advantages.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic front view of a pulley jet injection tester, FIG. 2 is a schematic cross-sectional view taken along line nn in FIG. 1, and FIG. 4 is a side view of the main part of the temporary holder, 5 and 5 are vertical side views of the pitch discriminator, 6 is a front view of the rotation stop head, and
The figure is a sectional view of a main part showing a pitch discrimination operation. (3)-Shinjindai (holding means), (9)・-gear, (9a
) - Tooth groove, (10) - Pitch discriminator, (14a)
- Single part, (15a) - Measuring head, (17) - Dial gauge with electric contacts (mechanism for measuring the amount of movement). 1■ 4th leg Figure 5 A Figure 7 A, O

Claims (1)

[Claims] (11) A holding mechanism that rotatably supports the gear in a fixed position at the center of the shaft, a gear rotation stopping mechanism that prevents rotation by fitting a pawl into the tooth groove of the supported gear, and a gear rotation stopping mechanism that prevents rotation from the standby position. A gear comprising: a measuring head that enters a tooth groove of a gear whose rotation is blocked and abuts both side surfaces of the tooth groove; and means for detecting the amount of movement of the measuring head from the standby position to the contact position. Pinch discrimination device.