JPH02185331A - Automatic assembling method for gear - Google Patents

Abstract

PURPOSE:To make it possible to automatically assemble gears when assembling the gears on a fixed shaft in parallel with an assembled gear shaft by detecting reaction force when both teeth portions do not mesh and having a holding head turn by a specified angle to bring the both teeth portions in meshes. CONSTITUTION:When an automatic assembling machine is turned on, an upper part of a gear B9 is gripped by the grip part 8a of a holding head 8 and positioned at a point on a shaft B3. Next, a fixed ram 5 descends in a direction marked by an arrow 13 and the penetration hole 10 of the gear B9 is inserted into the shaft B3. When the teeth portion 15 of the gear B9 comes into contact with the teeth portion 14 of a gear A4 and both teeth portions 14,15 do not mesh, a reaction force acts on the teeth portion 15 from the teeth portion 14, and the holding head 8 is relatively raised resisting against a coil spring 7, which turns on a limit switch 11. With this ON signal, the gear 9B is separated from the gear A4 and the limit switch is returned to OFF position. The fixed ram 5 is then rotated by a preset angle with a support arm and the ram 5 goes down. The same movement is repeated till the teeth portions 14,15 are brought in meshes.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for automatically assembling gears, and in particular, to an assembled gear that has already been assembled, another gear, that is, a gear to be assembled. The present invention relates to an automatic gear assembly method that can reliably and easily mesh the gears.

[Prior Art] Conventionally, in this type of automatic gear assembly method, the gear to be assembled is moved toward the assembled gear, and when the teeth of both gears interfere with each other, the gear to be assembled is moved toward the assembled gear. It is known that the two gears are brought into mesh by moving the gear along the outer surface of the teeth of the assembled gear.

In addition, related methods of this type include:

For example, Japanese Patent Laid-Open No. 58-45828 can be mentioned.

[Problems to be Solved by the Invention] The above-mentioned conventional technology has a step of moving the gear to be assembled along the outer surface of the teeth of the assembled gear. Later, this gear A
1 cannot be applied to a gear configuration in which it meshes with an assembled gear attached to another shaft.

The present invention solves the problems of the prior art as described above, and provides a gear configuration in which a gear is inserted into a shaft and then meshed with an assembled gear attached to another shaft. can also be applied reliably and easily. Providing an automatic gear assembly method.

That is the purpose.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the configuration of the automatic gear assembly method according to the present invention is such that the gears to be assembled are inserted into one of mutually parallel axes. , so that it meshes with the assembled gear that has already been assembled on the other shaft. In automatic gear assembly method.

The gear to be assembled is inserted into one shaft, and the gear is moved relative to the assembled gear in the direction of the assembled gear, and the teeth of the gear to be assembled are mutually When the gear interferes with The operation of relatively moving the gear to be assembled is repeated until the teeth start to mesh. It has l1 and l which are moved relative to the gear.

More details are as follows.

To carry out this method, an automatic assembly machine with a holding head is used. This holding head is capable of holding a gear to be assembled and moving it up and down, as well as imparting rotation to the gear. A lever of a reaction force detection sensor is in contact with this holding head.

First, the gear to be assembled is held by the holding head, and it is moved along the direction parallel to the axis of the assembled gear in the direction in which the teeth of the gear to be assembled approach the teeth of the assembled gear. When the reaction force detection sensor detects that the teeth of both gears interfere with each other during the first step of moving and the middle of this first step, the gear to be assembled is moved at a constant position along the axial direction. After separating this gear by the amount
The holding head rotates the teeth by an angle that is out of phase with the gear cutting pitch in the circumferential direction, brings them closer together in the axial direction, and when interference occurs, repeats the above operation to mesh the two teeth. 2 steps and then the 1st
This is achieved by carrying out the third step of moving the gears to be assembled in the axial direction until they are completely engaged.

[Operation] The holding head grips the gear to be assembled, inserts it into one shaft, and lowers it as it is, so that the tooth part of the assembled gear already assembled on the other shaft, The teeth of the gear to be assembled are brought into contact with each other. At this time, if the teeth do not mesh with each other, a reaction force is generated there, and this is transmitted to the reaction force detection sensor. The holding head that detects this reaction force moves upward in the axial direction by a certain amount. and,
The holding head rotates by an angle that is out of phase with the gear cutting pitch, and descends again along the axial direction to bring the two toothed portions into contact. After the gears are engaged, the holding head can be lowered to assemble both gears.

In this way, even if the gear to be assembled has a gear structure that is inserted into the shaft in advance, the gear to be assembled can be meshed securely and easily before the teeth of the assembled gear come into contact with each other. Can be assembled.

[Examples] Hereinafter, the present invention will be explained by way of examples using the drawings.

1 to 3 are side views showing essential parts of an automatic assembling machine used to carry out an automatic gear assembling method according to an embodiment of the present invention, and FIG. , FIG. 2 shows a state in which the gear to be assembled is gripped, and FIG. 3 shows a state in which the teeth of the gear to be assembled interfere with the teeth of the already assembled gear.

The state in which both the teeth are completely engaged and the assembly is completed is as follows.
FIG. 4 is an enlarged sectional view of a main part showing details of the interference portion in FIG. 2.

First, the configuration of this automatic assembly machine will be explained using FIG. 1.

In FIG. 1, 5 is a fixed ram supported by a support arm (not shown), and a sliding shaft 6 having a shaft portion 6a and a stepped portion 6b is fixed to the lower part of the fixed ram 5. has been done. Reference numeral 8 denotes a holding head having a grip portion 8a that can be opened and closed, and this holding head 8 is attached to the stepped portion 6b of the sliding shaft 6.
It is suspended in Then, the fixed ram 5 and the holding head 8
A coil spring 7 is inserted between the two. Further, a limit switch 11 related to a reaction force detection sensor is attached to the lower surface of the fixed ram 5, and a lever 12 thereof is in contact with the upper surface of the holding head 8.

When no reaction force (described in detail later) acts on the holding head 8, the holding head 8 is farthest from the fixed ram 5 and comes into contact with the stepped portion 6b due to the repulsive force of the coil spring 7. In this state, the limit switch 11 is turned off.

When the reaction force acts and the holding head 8 relatively rises along the shaft portion 6a against the repulsion force of the coil spring 7, the limit switch 11 is turned on.

An automatic gear assembly method according to an embodiment of the present invention will be described using the automatic assembly machine configured as described above.

On plate 1, axis A2. The axes B3 are erected parallel to each other and spaced apart by a predetermined distance. Then, assemble gear A4 to one shaft A2 (this becomes the assembled gear)
.

Here, when the automatic assembly machine is turned on, the through hole 10 is held in a predetermined position by the gripping part 8a of the holding head 8.
(This is the gear to be assembled). And, by the support arm,
Gear B9 is positioned at the position of axis B3.

The fixed ram 5 moves down in the direction of the arrow 13, and the through hole 10 of the gear B9 is inserted into the shaft B3. Gear B9 moves further down along axis B3. When the tooth portion 15 of the gear B9 contacts the tooth portion 14 of the gear A4 and the tooth portions 14 and 15 do not mesh with each other (second and fourth states), as the fixed ram 5 descends, A reaction force acts from the tooth part 14 to the tooth part 15, and this reaction force causes.

The holding head 8 rises relatively against the repulsive force of the coil spring 7, and the limit switch 11 is turned on. This ON
In response to the signal, the fixed ram 5 rises by a certain amount and gear B
9 moves away from gear A4, and limit switch 11 returns to OFF. Said support arm rotates the fixed ram 5 in the direction of the arrow 17 (see FIG. 1.4) by a preset angle different from the toothing pitch 18 of the toothing 14, so that the gear B9 is rotated relative to the gear A4. rotate relative to each other.

If the fixed ram 5 is lowered and the teeth 14, 15 do not mesh again, the same operation as before is repeated until they mesh.

Then, when they are engaged, the fixed ram 5 further descends,
When the teeth 14 of the gear A4 and the teeth 15 of the gear B9 are completely engaged in the axial direction, the automatic assembly machine is turned off.

According to the embodiment described above, an automatic assembling machine having a simple structure and a holding head 8 suspended on the fixed ram 5 is used, and the fixed ram 5 is moved down nine revolutions and then raised by a simple operation.

After inserting the gear B9 into the shaft B3, it is attached to the shaft A2 in advance.
Even if the gear is configured to mesh with the gear A4 that has already been assembled, the meshing can be automatically and reliably performed.

[Effects of the Invention] As explained in detail above, according to the present invention, after a gear is inserted into a shaft, this gear is meshed with an assembled gear assembled on another shaft. It is possible to provide an automatic gear assembly method that can be reliably and easily applied even to gear configurations.

[Brief explanation of the drawing]

1 to 3 relate to one embodiment of the present invention. 2 is a side view showing the main parts of an automatic assembly machine used to carry out an automatic gear assembly method, FIG. 1 shows a state in which a gear to be assembled is gripped by a holding head, and FIG. FIG. 3 shows a state in which the teeth of the gear to be assembled and the teeth of the assembled gear interfere. The state in which both the teeth are completely engaged and the assembly is completed is as follows.
FIG. 4 is an enlarged sectional view of a main part showing details of the interference portion in FIG. 2. 2... Axis A, 3... Axis B, 4... Gear A (assembled gear), 5... Fixed ram, 8... Holding head, 9
...Gear B (gear to be assembled), 14...Gear A
15...Tooth part of gear B, 18...Gear cutting pitch.

Claims (1)

[Claims] 1. A gear to be assembled is mounted on one of mutually parallel shafts so that it meshes with an assembled gear already assembled on the other shaft. In the automatic assembly method, a first step of inserting a gear to be assembled into one shaft and moving this gear relatively toward the assembled gear; When the gears interfere with each other, the gear to be assembled is separated from the assembled gear by a predetermined distance, the gear to be assembled is rotated by a predetermined angle different from the gear cutting pitch, and the gear is assembled again. a second step of repeating the operation of relatively moving the gear in the direction of the installed gear until both the teeth begin to mesh; and a second step of moving the gear to be assembled until the teeth completely mesh in the axial direction. A method for automatically assembling gears, comprising a third step of moving the gears relative to the assembled gears.