JPH08147811A - Gear device - Google Patents

Abstract

PURPOSE: To exactly and easily assemble plural gears requiring phase matching. CONSTITUTION: A first gear with cam 33 and a second gear 36 with cam requiring phase matching are provided with through-holes 20. On the other hand, a pin 23 is studed in an assembling jig 22. The pin 23 is made to protrude upward through the through-hole 26 of a chassis 2 at the time of assembling, the through-holes 20 of the respective gears 33, 36 are inserted through the pins 23 and the gears are mounted on central shafts 13A, 16A. They are assembled under such condition that the phases of the respective gears 33, 36 are matched with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear device capable of easily assembling a plurality of gears that require phase matching.

[0002]

2. Description of the Related Art For example, a gear device 10 as shown in FIG.
Are used to drive an operating part (not shown). In the gear unit 10, a drive gear 12 is connected to a power source such as a motor (not shown) fixed to a chassis 11 and rotatable in both directions, and a plurality of gears are sequentially meshed with the drive gear 12. First gear 13 with cam, intermediate gear 14,
15 and the second cam-equipped gear 16 have center holes 13D and 14 respectively.
B, 15B and 16C are rotatably attached to the central shafts 13A to 16A. Some or all of these gears (the first cam-equipped gear 13 and the second cam-equipped gear 16 in this example)
The cam grooves 13B, 13C, 16B are provided in the cam groove 13B, 13C, 16B, and the cam groove 13B, 13C, 16B is configured to drive the operating portion at a predetermined timing. Intermediate gear 1
Reference numerals 4 and 15 are relay gears for transmitting the rotation of the first cam-equipped gear 13 to the second cam-equipped gear 16.

In this gear device 10, it is necessary to arrange the cam grooves 13B and 13C of the first cam-equipped gear 13 and the cam groove 16B of the second cam-equipped gear 16 at a predetermined phase during assembly. Therefore, conventionally, the gears 13 to 16 are provided with the matching marks 17, and the gears 13 to 16 are assembled by aligning the matching marks 17 of the adjacent gears.

[0004]

The conventional gear device 10 has a problem that the workability is deteriorated because the alignment marks 17 must be aligned one by one when assembling adjacent gears. Also, in some cases, the matching mark 17
May be overlooked even if is slightly deviated, and in this case, the operation timing of the operation unit may deviate.

Therefore, the present invention solves the above-mentioned problems, and proposes a gear device capable of improving the workability of assembly and accurately matching the phase of each gear.

[0006]

In order to solve the above-mentioned problems, in the present invention, in a gear device having a gear for which phase matching is required and a supporting means for rotatably supporting the gear, a gear supporting means is provided. An engaging portion that engages with a pin that is set up on an assembly jig is provided on the side opposite to and a through hole through which the pin penetrates is provided in the supporting means. It is characterized in that the gear is assembled by penetrating and projecting to the gear side and engaging the engaging portion of the gear with the pin.

[0007]

As shown in FIG. 1, the through hole 20 is provided in the first cam gear 33 and the second cam gear 36 that require the phase matching. On the other hand, as shown in FIG. 2, pins 23 are planted in the assembly jig 22. And at the time of assembly,
As shown in FIG.
The pin 23 is projected upward through the through hole 20 of the gears 33 and 36, and the central shaft 13A,
Attach to 16A. As a result, the gears 33 and 36 are assembled with the phases in phase with each other.

[0008]

Next, one embodiment of the gear device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the construction and assembling procedure of a gear device 1 according to the present invention. This gear device 1 includes a drive gear 1 on a support means (chassis 2 in the present application) as in the conventional example of FIG.
2, the first cam-equipped gear 33, the intermediate gears 34 and 35, and the second cam-equipped gear 36 are arranged so as to sequentially mesh with each other. The drive gear 32 is driven by a motor or the like (not shown) to drive the gears 33 to 36, and the other gears 33 to 36 are driven by the central shaft 1.
3A to 16A. As for the mounting method, various methods are publicly known, and thus detailed description thereof will be omitted. Further, the first cam-equipped gear 33 and the second cam-equipped gear 36 are provided with cam grooves 13B, 13C and 16B, respectively.
An operation unit (not shown) is driven by 3B, 13C, 16B at a predetermined timing. Therefore, when assembling the gear device 1, the phases of the cam grooves 13B, 13C and the cam groove 16B, and thus the first groove, are set as described below.
The phase of the cam gear 33 and the second cam gear 36 can be accurately matched.

An assembly jig 22 is placed on the workbench 21. The assembly jig 22 includes a plurality of positioning pins 24,
Pins 23 are planted. The positioning pin 24 is fitted in a positioning hole 25 formed in the chassis 2 described later, and the pin 23 is fitted in a through hole 20 provided in each gear 33 to 36 through a through hole 26 provided in the chassis 2. It The positioning pins 24 and the pins 23 may be directly planted on the workbench 21 instead of the assembly jig 22. In this case, the workbench 21 also serves as the assembly jig 22.

The chassis 2 has a central shaft 13 similar to the conventional example.
A to 16A are planted. This central axis 13A-16
A is the first gear 33 with cam, the intermediate gears 34 and 35, the second
Center holes 33D, 34B, 35B, 36 of gear 36 with cam
C is inserted. Since there are various known methods for processing such as prevention of disengagement of the gears 33 to 36 after attachment, description thereof will be omitted here. A drive gear 12 driven by a motor or the like (not shown) is attached to the chassis 2.
Driving the driving means (not shown) by rotating the other gears 33 to 36 is also similar to the conventional one.

In this example, two positioning holes 25 are formed in the chassis 2, and the positioning pins 24 set in the assembly jig 22 are fitted therein. Positioning hole 2
The hole diameter of No. 5 is set to be approximately equal to the shaft diameter of the positioning pin 24 so that it can be fitted therein, whereby the position of the chassis 2 is determined with respect to the assembly jig 22.

The chassis 2 is further provided with a through hole 26, and the above-mentioned pin 23 is passed through the through hole 26. By making the hole diameter of the through hole 26 sufficiently larger than the shaft diameter of the pin 23, workability at the time of assembly is improved. A first cam-equipped gear 33, intermediate gears 34 and 35, and a second cam-equipped gear 36 are attached to the central shafts 13 </ b> A to 16 </ b> A that are set up on the chassis 2. As described above, the first cam-equipped gear 33 and the second cam-equipped gear 36 need to be in phase with each other.

First cam gear 33 and second cam gear 3
6 is provided with a through hole 20 into which the above-mentioned pin 23 is fitted. The hole diameter of the through hole 20 is set to be substantially equal to the shaft diameter of the pin 23 so that the first cam gear 33 and the second cam gear 36 are fixed to the assembly jig 22. The chassis 2 is also fixed to the assembly jig 22, so that the first cam gear 33 and the second cam gear 36 are fixed to the chassis 2.

FIG. 2 is a sectional view through the central axes of the pins and gears of FIG. FIG. 3 shows the through hole 20 and the pin 2 in FIG.
It is an enlarged view which shows the engagement state of FIG. The heights of the positioning pins 24 and the pins 23 are appropriately set so that the chassis 2 or the first cam-equipped gear 33 and the second cam-equipped gear 36 can be reliably held and their positions can be reliably determined.

Further, the position of the pin 23 and the position of the through hole 20, the position of the positioning pin 24 and the position of the positioning hole 25 are set by the assembling method described later, and then the first cam-equipped gear 33. It may be appropriately determined in advance so that the second cam gear 36 and the second cam gear 36 are in phase with each other.

An assembling procedure of the gear device 1 having the above-mentioned structure will be described below. The chassis 2 is placed on the assembly jig 22 on the workbench 21. At that time, the positioning pin 24 is fitted into the positioning hole 25 to fix the chassis 2 to the assembly jig 22. At that time, the pin 23 passes through the through hole 26 and the chassis 2
Protrudes above the upper surface of the.

Next, the center hole 33D of the first cam-equipped gear 33 is attached to the chassis 2 while the through hole 20 is inserted into the center shaft 13A and the through hole 20 is inserted into the pin 23. Since the positions of the central shaft 13A and the pin 23 can be confirmed from above by the central hole 33D and the through hole 20, they can be easily attached.

Similarly, the gear 36 with the second cam also has a center hole 36.
The C is attached to the chassis 2 while fitting the through hole 20 into the pin 23 and the through hole 20 into the pin 23. At this time the first
The cam-equipped gear 33 and the second cam-equipped gear 36 are attached to the chassis 2 in phase with each other.

If it is not necessary to match the phases of the intermediate gears 34 and 35, it is not necessary to provide the through holes 20 and the corresponding pins 23, and the chassis 2 can be used as it is.
You can attach it to. When it is necessary to match the phases of the intermediate gears 34 and 35, the intermediate gears 34 and 35 are attached to the chassis 2 by aligning the positions in the same manner as the gear 33 with the first cam (FIG. 1).

Thus, the gear 33 with the first cam and the intermediate gear 3
4 and 35, and when the second cam-equipped gear 36 is attached to the chassis 2, the gears are arranged such that the first cam-equipped gear 33 and the second cam-equipped gear 36 are in phase with each other. The drive gear 12 can be attached at any time. In this way, after mounting the gears 12 to 36 in a predetermined phase, if the chassis 2 is lifted from the workbench 21, the assembly jig 22 is detached from the chassis 2 and left on the workbench 21 as it is. 1 is completed.

As described above, in the gear device 1 of the present invention, the assembling jig 2 is provided with the through holes 20 of the gears 33 to 36 that require phase matching.
Since the phases of the gears 33 to 36 can be accurately adjusted by merely fitting the two pins 23, the assembling work is easy and the phase shift can be surely prevented. In addition, in the above-described embodiment, the through holes 2 are also formed in the intermediate gears 34 and 35.
Although 0 is provided and it is fitted into the pin 23, it may be omitted. Further, instead of the through hole 20, a groove having the same diameter as the through hole 20 may be used. In this case, pin 2
Make sure that 3 fits in the groove.

[0023]

As described above, the present invention is provided with a plurality of gears for which phase matching is required and a supporting means for rotatably supporting the gears, and the gear supporting means in the state where the gears are in phase with each other. The engaging means is provided on the side opposite to the engaging means, the through hole is provided at a position corresponding to the engaging means of the supporting means, and the pin of the assembly jig is inserted from the through hole of the supporting means to project toward the gear side. The gear is assembled by engaging the gear engaging means with the gear.

Therefore, according to the present invention, since the phase can be adjusted only by fitting the engaging means of each gear, for example, the through hole into the pin of the assembling jig, the assembling work is facilitated and the through hole is pinned. Since it cannot be assembled unless it is fitted in, it is possible to reliably prevent the phases of the gears from shifting.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration and an assembling procedure of a gear device 1 according to the present invention.

FIG. 2 is a sectional view showing an assembling procedure.

FIG. 3 is a sectional view showing an engaged state of a through hole 20 and a pin 23.

FIG. 4 is a plan view showing a configuration and an assembling procedure of a conventional example.

[Explanation of symbols]

 1, 10 Gear device 2, 11 Chassis 13, 33 First gear with cam 16, 36 Second gear with cam 20 Through hole 22 Assembly jig 23 Pin 26 Through hole

Claims (2)

[Claims] 1. A gear device having a gear for which phase matching is required and a supporting means for rotatably supporting the gear, wherein a surface of the gear facing the supporting means is planted in an assembly jig or the like. With an engaging portion that engages with the pin,
The supporting means is provided with a through hole through which the pin penetrates, and the pin is penetrated through the through hole of the supporting means to project toward the gear side, and the engaging portion of the gear is engaged with the pin. A gear device characterized in that the above gear is assembled. 2. The gear device according to claim 1, wherein the engaging portion is a through hole.