JPH08159921A - Inspection apparatus for gear - Google Patents

Abstract

PURPOSE: To provide an inspection apparatus by which the inspection operation for gear is automated. CONSTITUTION: In the inspection apparatus 1 of gear, a first cylinder 4 is arranged on a fixed stand 2, and a base 3 which is connected to the first cylinder 4 is arranged. A freely rotatable master gear 11 whose size has been inspected strictly in advance and a motor 10 which turns and drives the master gear 11 are installed on the base 3. On the other hand, the inspection apparatus is constituted in such a way that a work holding part 15 which holds a work gear 12 so as to be freely rotatable is installed in a position which is engaged with the master gear 11, that a work transfer device which feeds and discharges the work gear to and from the work holding part 15 is installed and that an inspection means which inspects the work gear 12 is installed. The master gear which is turned by receiving the drive of the motor is installed on the base, the work gear is fed to the work holding part, the work gear is engaged with the master gear so as to be turned, and the work gear is inspected by the inspection means. As a result, a series of inspection operations for gears can be automated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear inspection device for inspecting a processed gear.

[0002]

2. Description of the Related Art Conventionally, gears which have been incorporated into various machines and used as power transmission means are subjected to various inspections at the stage of production to select good products and defective products. The inspection of this gear basically consists of tooth thickness, tooth height, pitch,
Focusing on tooth parts such as pitch circles and tooth profiles,
At present, this work is performed manually by an inspector using various measuring devices such as a micrometer for gears.

[0003]

In inspecting the above-mentioned gears, since the inspector inspects the gears using various measuring instruments, the accuracy varies, and in particular, the gears are mass-produced. In such a case, the punching inspection is performed, which causes a problem that the defective rate of the gear is increased. In addition, it is pointed out that this inspection work requires a precise work, which imposes a heavy mental burden on the person in charge of the inspection and adversely affects health.

The gear inspection device of the present invention was created in view of the above problems, and its primary purpose is to automate the inspection work of gears, and also to perform the inspection work of gears simply and rationally. The second purpose is to prevent damage to gears during inspection, and the third purpose is to prevent damage.

[0005]

In order to achieve the first object, the gear inspection device of the present invention has a reciprocating drive source disposed on a fixed base, and is connected to the reciprocating drive source to form a fixed base. A base that can be moved back and forth is arranged. In this base,
A master gear, which is a gear whose dimensions have been strictly checked in advance, is rotatably arranged, and a rotary drive source for rotationally driving the master gear is installed. On the other hand, on the moving path of the master gear, a work holding unit that rotatably holds a gear that serves as a work is provided at a position meshing with the master gear, and a work transfer device that supplies and discharges the work to the work holding unit is provided. Install. Further, it is configured by providing an inspection means for inspecting a gear serving as a work held by the work holding portion.

In order to achieve the second object, the inspection means is a movement amount detecting means arranged on a fixed base for detecting the movement amount of the base, and the work held by the work holding portion meshes with the master gear. And a rotation speed detecting means for detecting the rotation speed when the motor rotates.

Further, in order to achieve the third object, the reciprocating drive source and the base are connected via an elastic body.

[0008]

In the above gear inspection device, when a work gear is supplied to the work holding unit from the work transfer device, the reciprocating drive source operates to move the base forward to engage the master gear with the work. Move to. At this time,
Since the movement of the base is due to the elastic force of the elastic body, no impact is given when the master gear meshes with the gear serving as the work. When the master gear is rotated by the driving of the rotary drive source after the master gear and the work mesh with each other, the work also rotates accordingly. At this time, the inspection means detects the rotation state of the work or the distance between the master gear and the gear serving as the work, and inspects the gear from these data. After the inspection is completed, the master gear is separated from the work by the operation of the reciprocating drive source, and the gear serving as the work is taken out from the work holding portion by the operation of the work transfer device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 and FIG. 2, reference numeral 1 denotes a gear inspection device, which has a fixed base 2 which is fixedly installed at a work position or the like, and a guide path 2a is arranged on the fixed base 2 in the longitudinal direction thereof. A base 3 is movably fitted in the passage 2a. A first cylinder 4, which is an example of a reciprocating drive source, is installed at the rear portion of the fixed base 2, and a spring receiver 4b is fixed to the tip of the rod 4a of the first cylinder 4.
The spring receiver 4b is inserted through the protrusion 3a provided on the rear portion of the base 3 described above. A spring 5 which is an example of an elastic body is provided between the spring receiver 4b and the protrusion 3a of the base 3.
Are arranged, and the base 3 is configured to move along the guide path 2a by receiving the elastic force of the spring 5 compressed by the operation of the first cylinder 4. As the elastic body, it is possible to use rubber or the like having an excellent restoring force other than the spring 5 described here.

A bracket 2b extending above the base 3 is provided on the front surface of the fixed base 2, and a linear sensor 6 which is an example of a moving amount detecting means is attached to the bracket 2b. This linear sensor 6 has a detection terminal 6
The linear movement distance of the detection target is measured by the movement amount of a, and the base 3 is provided with a contact portion 3b corresponding to the mounting position of the linear sensor 6. A second cylinder 7 is installed above the bracket 2b. The rod 7a of the second cylinder 7 extends vertically downward, and an elevating table 8 is arranged at the tip of the rod 7a.
A rotary encoder 9 which is an example of a rotation speed detecting means having a rotation driven shaft 9a is installed in the. The rotary encoder 9 is arranged so that the rotary driven shaft 9a is located vertically above a work holding base 14 described later. The rotary encoder 9 and the linear sensor 6 constitute an inspection means for inspecting a work.

A motor 10, which is an example of a rotary drive source, is fixed to the front of the base 3, and a master gear 11 is connected to the motor 10 so that the motor 10 can be rotated by driving the motor 10. Has been done. The master gear 11 is a gear in which teeth that mesh with a gear to be a work (hereinafter, referred to as a work gear 12) are formed. The master gear 11 has a tooth thickness, a tooth height, a pitch, a pitch circle, a tooth profile, and the like. What is rigorously tested is used.

On the other hand, a disk-shaped index table 13 which is intermittently rotated by the driving of a motor (not shown) is installed at the front position of the fixed base 2. Workpiece holders 14 projecting in the circumferential direction are provided at positions where the circumference of the index table 13 is divided into four,
An annular bearing 14a is incorporated in each of the front ends of the work holding bases 14. The work holding table 14 and the index table 13 constitute a work holding portion 15 which holds the work gear 12 rotatably at a position where it meshes with the master gear 11 and allows the work gear 12 to be continuously conveyed.

The index table 13 is configured to sequentially stop the bearings 14a of the respective work holding bases 14 below the rotary driven shaft 9a of the rotary encoder 9 (hereinafter referred to as an inspection station). Although not shown, the work gear 12 is supplied to the work holding table 14 at a stop position of the work holding table 14 of the index table 13 other than the inspection station, or the work gear 12 after the inspection is finished. A work transfer device for taking out from the work holding table 14 is provided.
In the present embodiment, as shown in FIG. 3, the work gear 12 includes a tooth portion 12a that meshes with the master gear 11 and a shaft portion 1 that projects integrally from both ends of the tooth portion 12a.
2b, and the bearing 14a of the work holding table 14 is provided for inserting the shaft portion 12b of the work gear 12.

In the gear inspection device 1 having the above structure, the operations of the motor 10, the first cylinder 4, the second cylinder 7, the index table 13, the work transfer device, etc. are managed by a controller (not shown). In addition, this control device is also provided with a processing function of data detected by the linear sensor 6 and the rotary encoder 9, and is configured to be able to process data such as the rotation state of the work gear 12 and the movement amount of the base 3. ing.

Next, the operation of the embodiment will be described.

In the gear inspection device 1 having the above-described structure, the work gear 1 is attached to the work holding table 14 from a work transfer device (not shown).
When 2 is supplied, the motor is driven to intermittently rotate the index table 13 in 90 ° increments on the plane. In this way, when the work gear 12 reaches the inspection station,
Then, the second cylinder 7 is operated to lower the rotary encoder 9 together with the lifting table 8 so that the rotary driven shaft 9a is brought into contact with the upper end of the shaft portion 12b of the work gear 12. Work gear 1
2 is sandwiched between the bearing 14a and the rotation driven shaft 9a, and is rotatably held. At the same time, when the first cylinder 4 operates to move the base 3 along the guide path 2a, the master gear 11 approaches the work gear 12 and their teeth come into contact with each other. At this time, the movement of the base 3 is performed by the elastic force of the spring 5 which is compressed as the rod 4a of the first cylinder 4 expands. Therefore, the pressing force of the first cylinder 4 is absorbed by the spring 5, so that the master gear Reference numeral 11 smoothly contacts or meshes with the work gear 12. Further, after the master gear 11 and the work gear 12 come into contact with each other, the master gear 11 is always urged toward the work gear 12, and a reliable meshing between the two can be obtained.

After that, when the motor 10 is driven and the master gear 11 starts to rotate, the master gear 11 and the work gear 12 mesh with each other, and the rotation is transmitted to the work gear 12. The work gear 12 rotates following the master gear 11, and the number of rotations at this time is detected by the rotary encoder 9. At this time, the rotation speed of the work gear 12 can be limited within a certain range if the tooth thickness, the tooth height, the tooth profile and the like are properly formed. Therefore, if the work gear 12 is a defective product, the number of revolutions changes due to defective molding of the teeth, eccentricity, etc., and the defective work gear can be easily identified.

On the other hand, with the movement of the base 3, the contact portion 3b comes into contact with the detection terminal 6a of the linear sensor 6 and moves the detection terminal 6a of the linear sensor 6 until the master gear 11 and the work gear 12 mesh with each other. The movement amount of the base 3 is detected by the sensor 6. Since the linear sensor 6 is always fixed, if the tooth portion 12a of the work gear 12 is correctly formed and the pitch circle diameter is accurate, the movement amount of the base 3 is always detected within a certain range. Therefore,
When the detected value of the linear sensor 6 is abnormal, the work gear 12 is rejected as a pitch circle diameter defect. Further, when the work gear 12 is eccentric, the base 3 is moved back and forth during rotation, so this movement amount is detected by the linear sensor 6, and the eccentric work gear 12 is easily identified and eliminated along with the detection of the number of rotations described above. be able to.

In this embodiment, the linear sensor 6 which is the moving amount detecting means and the rotary encoder 9 which is the rotational speed detecting means are installed on the fixed base 2, but these are, for example, the fixed base 2 and the index. The same effect can be obtained even if the base 3 is independently arranged in a dedicated frame or the like provided between the table 13 and the base 3 can be configured to be movable up and down and moved laterally very easily. Further, in addition to the index table 13 in the work holding unit 15, for example, a conveyor having each work station,
The present invention can be implemented as long as it is a transport unit capable of sequentially transporting the work gear 12, and the effects obtained by this are also the same.

[0020]

The gear inspection device of the present invention, which has been described in detail above, is provided with a master gear which is driven by a motor to rotate on a base which is moved by the operation of a first cylinder, while a work is placed on an index table. Since the holding table is arranged, the work gear is automatically supplied to the work holding table, and the quality of the work gear is discriminated by the inspection means, all the gears can be inspected automatically.

Further, since the linear sensor and the rotary encoder are provided as the inspection means, it is possible to reasonably confirm the working state of the work gear such as the thickness of the work gear tooth, the height of the tooth, the pitch, the pitch circle, the eccentricity and the like. It will be possible to do
This makes it possible to extremely simplify the work work inspection work while maintaining reliability.

Further, since the base is biased by the spring provided on the rod of the first cylinder, the master gear can be brought into smooth contact with the work gear with a constant force by the biasing of the spring, and the master gear is By engaging with the work gear, it is possible to absorb the excessive extension of the first cylinder after that, and it is possible to prevent an excessive force from acting on the tooth portion of the work gear and prevent damage to the gear.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a gear inspection device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view of a work gear.

[Explanation of symbols]

 1 Gear Inspection Device 2 Fixing Base 2a Guideway 2b Bracket 3 Base 3a Projection 3b Contact Part 4 First Cylinder (Example of Reciprocating Drive Source) 4a Rod 4b Spring Receptor 5 Spring (Example of Elastic Body) 6 Linear Sensor (Movement) Quantity detection means 6a Detection terminal 7 Second cylinder 7a Rod 8 Lifting platform 9 Rotary encoder (An example of rotation speed detection means) 9a Rotation driven shaft 10 Motor (an example of rotation drive source) 11 Master gear 12 Work gear 12a Teeth 12b Shaft part 13 Index table 14 Work holding base 14a Bearing 15 Work holding part

Claims (3)

[Claims] 1. A fixed base provided at a working position is provided, a reciprocating drive source is arranged on the fixed base, and a base reciprocally movable along the fixed base is connected to the reciprocating drive source. On this base, a master gear, which is a gear whose dimensions have been strictly inspected beforehand, is rotatably arranged, and a rotary drive source for rotationally driving this master gear is installed, while it is on the moving path of the master gear. A work holding unit that rotatably holds a gear that serves as a work at a position that meshes with the master gear, and a work transfer device that supplies and discharges the work to the work holding unit is installed. An inspection device for gears, comprising inspection means for inspecting a gear that is a held work. 2. The inspection means is arranged on a fixed base and detects the amount of movement of the base, and the number of revolutions when the work held by the work holding portion meshes with the master gear and rotates. The gear inspection device according to claim 1, further comprising: a rotation speed detection unit. 3. The gear inspection device according to claim 1, wherein the reciprocating drive source and the base are connected via an elastic body.