JPH0392625A - Clutch gear device - Google Patents

Abstract

PURPOSE:To surely control power transmission and non-transmission by obtaining free rotation of a driven gear with the positioning mechanism and the toothless territory of a main driving gear, and enabling to transmit power in the lack tooth territory by function of the ratchet supplementary cog of the main driving gear. CONSTITUTION:A toothless territory 16 is formed in a main driving gear 10, and a ratchet supplementary cog 18 and a cog stopper 22 which are positioned in the territory and energizated with an energizating spring 20 are coaxially provided on the main driving gear 10. On a driven gear 12, a start tooth 24 meshing with the main driving gear and removing neighboring teeth is provided, a driven supplementary cog 26 is coaxially piled, and a positioning mechanism in the rotating direction composed of detent cams and levers mounted coaxially on the main driving gear 10 and the driven gear 12 is provided. Consequently, free rotation of the driven gear 12 is obtained, power transmission in the toothless territory 16 is possible to continue rotational movement, and power transmission and non-transmission can be surely controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a clutch gear device, particularly to an improvement in a mechanism for transmitting power between gears.

[Prior Art] In recent years, various means have been proposed for clutch devices that intermittent transmission of power from a drive shaft to a driven shaft.

For example, in a conventional clutch gear device using gears, when transmitting power from a driving gear to a driven gear, the gears are moved to a position where they can mesh with each other, and when the power is not transmitted, one of the gears is moved. We try to avoid mutual interlocking.

That is, transmission of power from the driving gear to the driven gear and stopping of the transmission is accomplished by engaging and disengaging the gears by moving their positions.

Also, when the power generated by the rotation of the driven south wheel is not transmitted to the main drive gear, a similar separation operation is used.

[Problems to be Solved by the Invention] 2. In conventional clutch gear devices, when controlling power transmission, a gear moving mechanism is required to engage and disengage the gears, and it is difficult to install this mechanism. 3. This has resulted in problems such as a complicated structure, an increase in the size of the device, and an increase in cost.

Further, when the meshing operation is performed by moving the gear, it is necessary to precisely adjust the timing in order to prevent damage to the gear, and it is also difficult to control the moving operation.

This problem arises because in a device in which two types of driven wheels are provided on one driven shaft and two types of rotation are applied to the driven shaft, it is necessary to adjust the movement of each of the two gears, etc. It was becoming even more difficult.

Furthermore, since the gears do not rub against each other in the meshed state, there is no phase shift between the main gear and the driven gear. However, when gears engage and disengage as in the past, there is a risk that a phase shift may occur each time, and it is necessary to provide a separate means to restore the phase when a shift occurs. There was a problem.

Purpose of the Invention The present invention has been made with the object of solving the above-mentioned problems, and the first objective is to provide a gear movement mechanism to control power transmission and non-transmission between gears. To provide a clutch gear device that can be controlled with a simple configuration without any hassle.

[Means for Solving the Problems] In order to achieve the above object 1, the clutch gear device according to the present invention includes a main drive gear that is rotationally driven by power from a drive source, and a position that meshes with the main drive gear. and a driven gear that is rotated by the power from the main driving gear and transmits the rotational force to the load, and the main driving gear and the driven gear each have the following components.

The main gear is: - A toothless area where a predetermined number of teeth have been removed to allow free rotation of the driven gear; - The main drive gear is stacked and pivoted in the axial direction of the main drive south wheel, and is offset in the axial direction from the teeth of the main drive gear. a ratchet auxiliary cog having an engaging part at a position in which the ratchet auxiliary cog is biased so that the rotational direction position of the engaging part of the ratchet auxiliary cog is within the tooth-missing region, and opposite to the rotational direction of the main drive gear; A cog regulating means that prevents rotation in the direction of the main drive gear and also allows escape rotation in the same direction as the rotation direction of the main drive gear. A starting tooth in which at least the tip of the adjacent tooth on the south side has been removed, ■ meshes with the ratchet auxiliary cog during four-way rotation drive by the main driving gear, and receives rotational force from the main driving gear in the tooth-missing region; Each has a driven auxiliary cog.

Furthermore, the clutch gear device according to the present invention includes a main gear positioning mechanism that stops the main gear at a position where the tooth-missing region faces the front of the driven gear; It has a driven gear positioning mechanism that stops the driven gear at the position where the driven gear is stopped.

[Operation] According to the clutch gear device having the above structure, the main driving gear starts meshing with the starting teeth of the driven gear by its rotation, transmits the power to the driven gear, and rotates the driven gear. When the cut-out area of the main drive granley reaches the meshing position with the driven gear, the ratchet 1 and auxiliary cog of the main drive gear mesh with the auxiliary cog of the driven gear, and the rotational force can be transmitted to the driven gear. can.

Therefore, in the tooth-missing region of the main drive gear, the teeth of the gears do not mesh with each other, or the transmission of the same amount of force to the driven gear can be continued by the meshing of the ratchet auxiliary cog and the driven puller cog.

Furthermore, when the main gear is positioned by the main gear positioning mechanism so that its toothless area faces the front of the driven gear, the driven south wheel does not mesh with the main drive gear and can rotate freely. I can do it.

However, due to the rotation of the driven trli, the driven auxiliary cog hits the meshing part of the ratchet l-sode assistant cog located in the toothless area, but the ratchet auxiliary cog is prevented from rotating in the same direction as the rotational direction of the main drive gear by the cog regulating means. Since the driven gear is installed to perform this, the rotation of the driven gear is not hindered by the collision between the cogs.

Therefore, according to the present invention, it is possible to continuously rotate the driven wheel by the driving south wheel, and also to prevent the driven gear from turning four times. can also be secured.

[Embodiments] Hereinafter, preferred embodiments of the clutch gear device according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a clutch float device according to the present invention, and FIG. 2 is a partially extracted view when viewed from the axial direction (arrow 100) of FIG. 1. In the figure, reference numeral 10 indicates a main drive unit, which is rotationally driven by power from a drive source (not shown).

Reference numeral 12 denotes a driven gear, which is installed at a position where it meshes with the driving gear 10, and its central axis, the driven shaft 14, is connected to a load (not shown).

As clearly shown in FIG. 2, the main movable granley 10 has a cut-out south region 16 with the south removed. This missing tooth area 16
is effected in this example by removing four teeth. A ratchet auxiliary cog 18 is rotatably attached coaxially with the main drive cart. This ratchet auxiliary cog 18 is biased in the direction of arrow 200 by a biasing spring 20, which is attached to the main drive member 10 at one end and attached to the ratchet auxiliary cog 18 at the other end.

Further, the main drive gear 10 is provided with a cog stopper 22,
Rotation of the ratchet auxiliary cog 18, which is forced in the direction of the arrow 200, is stopped at a predetermined position.

The ratchet auxiliary cog 18 has an engaging part 18a formed by two teeth, and this engaging part 18a is located at the cheek center of the toothless area 16 when the ratchet auxiliary cog 18 is stopped by the cog stopper 22. It is arranged so that it is located in the section. That is, the meshing portion 18a of the ratchet auxiliary cog 18 is set at a position offset in the axial direction from the teeth of the main drive wheel 10, and the rotational direction position is set approximately at the center of the recessed south region 16. However, it is possible to rotate in the direction of arrow 300, which is the rotational direction of the main drive gear 10, against the biasing spring 20.

On the other hand, the number of teeth of the driven gear 12 is adjusted so that it rotates in half and quarter when the main drive gear 10 rotates twice.

A starting tooth 2 that first meshes with the rear of the driving gear 10 when the driven gear 12 rotated by the driving gear 10 starts rotating.
Two numerals 4 are provided at opposing positions with the shaft in between. At least the tips of the teeth adjacent to the activation tooth 24 are removed, but in this embodiment the entire tooth is removed. By removing these adjacent teeth, the end of the main drive gear 10 meshes with the starting teeth 24 with <1'' smoothness without causing a collision with the adjacent south gear at the time of starting.

In this embodiment, this can also be achieved by removing the adjacent teeth on both sides of the starting tooth 24, or by removing only the teeth on the intruding side of the main drive gear 10 depending on the direction of rotation of the main drive gear 10. The effect is similar.

Further, a driven auxiliary cog 26 is coaxially stacked on the driven gear 12. This driven auxiliary cog 26 has two meshing parts 2.
6a and 26b are formed, each with two activation teeth 24
They are provided at an intermediate position facing each other around the axis.

Further, although not shown in FIGS. 1 and 2, the main gear 10 and the driven gear 12 are provided with a positioning mechanism for setting the position of each float in the rotational direction.

FIG. 3 is an explanatory diagram showing an example of this positioning mechanism,
The detent cam 30 is connected to the main gear 10 or the driven gear 12.
The groove 30 of the detent cam 30 is provided coaxially with the detent cam 30.
Rotation of the detent cam 30 is restricted by engaging and disengaging the tip end projection 32a of the detent gear 32 from the detent gear 32, thereby setting the positions of the main drive gear 10 or the driven gear 12, which are coaxially fixed.

This positioning mechanism positions the missing region 16 of the main drive gear 10 at a position directly facing the driven gear 12, and the positioning mechanism of the driven gear 12 is such that the starting gear 24 of the driven gear 11 and the garden wheel 12 is located on the main drive south gear 10. It is positioned so that it is in a position facing the front.

Next, the operation of the embodiment will be explained.

First, the main drive gear 10 is moved to the toothless area 16 by the positioning mechanism.
When the driven gear 12 is stopped in a position facing the driven gear 12 (the state shown in FIG. 2), the driven gear 12 can freely rotate in the direction of the arrow 400h. In other words, the main drive south car 10
Since the tooth-missing region 16 is formed, the teeth of the driven gear 12 do not mesh with the teeth of the main drive gear. Further, the engaging portion 26a or 26b of the driven sleeve assisting cog 26 is indicated by the arrow 4.
The rotation in the 00 direction collides with the meshing portion 18a of the ratchet auxiliary cog of the main drive gear 10, but the ratchet auxiliary cog 18a resists the {=1 force of the f=l force spring 20 and rotates in the direction of arrow 3.
Since the driven gear 12 rotates in the 00 direction, the driven gear 12 can continue its free rotation without being stopped by the ratchet/auxiliary cog 18.

Next, when the main drive gear 10 starts rotating in the direction of arrow 300 by the drive source, the first tooth 10-1 of the main drive gear 10 meshes with the starting south 24 of the driven south wheel 12, and the driven gear 12 is started. Ru. At this time, since the adjacent teeth of the starting tooth 24 have been removed, the first tooth of the main driving gear 10
The teeth 10-1 do not collide with the tips of any teeth other than the activation teeth 24, and the meshing operation is smooth.

Then, when the main driving gear 10 rotates and rotates up to the final tooth 10-14, it reaches the toothless region 16 and power transmission by the gear of the main driving gear 10 is no longer performed. However, at this time, the meshing portion 18a of the ratchet auxiliary cog 18 meshes with the meshing portion 26a or 26b of the driven auxiliary cog 26 of the driven gear 12, and due to this meshing, the power of the main drive gear 10 is transmitted to the driven gear 12. The rotation continues. Then, when the rotation of the main drive gear 10 is further continued, power is transmitted sequentially from the first tooth 10-1.

Note that since the ratchet auxiliary cog 18 is prevented from rotating in the direction of the arrow 200 by the cog stopper 22,
The rotational force can be reliably transmitted to the driven bucket support cog 26.

Next, an example in which the clutch gear device according to the present invention is used in a rotating mechanism of a type drum impregnated with two color inks of a two-color printer will be described with reference to FIG.

In the figures, elements similar to those shown in FIGS. 1 and 2 are given the same reference numerals.

The main gear 10 and the driven gear 12 according to the present invention are used as a printing (low speed) float unit.

Note that, for the sake of simplification of the drawing, parts such as the ratchet auxiliary cog 18 of the main drive gear are not shown. A motor 34 is used as a drive source for rotationally driving the main drive wheel 10 for printing (low speed), and the driving force of this motor 34 is transmitted to a clutch mechanism 40 by intermediate south wheels 36 and 38 (power cam gear, etc.), It is transmitted from the mechanism 40 to the printing (low speed) main drive gear 10.

The positioning mechanism for the main drive gear 10 for printing (low speed) is as follows:
A detent cam 30 and a detent 1 lever 32 are provided coaxially, and the position in the rotational direction is set by these.

The driven shaft 14, which is the rotating shaft of the driven gear 12 for printing (low speed), has gears (10 and 1) for printing (low speed) on the driven shaft.
2) A skip (high speed) gear mechanism is provided which provides a different type of rotation.

In other words, the skip (high speed) driven gear 42 is driven! t
h14, and is further provided with a skip (high-speed) driving gear 44 that transmits the driving force from the motor 34 to the skip (high-speed) river conquest south wheel 42, and a clutch mechanism 40.
It is installed so that it receives power from the

Although the positioning mechanism for the printing (low-speed) driven gear 12 is not shown, detent units (30, 32) are provided coaxially with the driven gear 12, and the positioning thereof is different.

The other end of the follower 14 is connected to a type drum as a load. This type drum has two types of driven gears 12 and 42.
Rotation is controlled by arbitrary speed.

Here, the skip rotation by the skip (high speed) driven gear 42 is used to skip over areas of other colors that are not used when the type drum is divided into two colors in the circumferential direction for printing two types of colors. 15 rotations are performed for this purpose. The rotation by the printing (low speed) driven gear 12 is the low speed rotation that is performed during normal printing operation.

Figure 5 shows the main gear 44 and driven gear 4 for the skip.
FIG. 2 is an oblique diagram showing a specific example of jM formation of No. 2;

In the figure, the number of teeth of the skip driven south wheel 44 is adjusted so that the skip driven gear 42 rotates half a rotation with one rotation, and a part of the skip driven south wheel 44 has missing teeth to allow the skip driven gear 42 to rotate freely. A region 46 is formed. A driven cog 48 is formed at the end of this toothless region 46.

On the other hand, the skip driven gear 42 is the skip main drive gear 4.
4 makes a half rotation, and a driven cog 50 is provided for each half rotation. The driving cog 48 and the driven cog 50 have meshing portions at positions offset from the teeth of the respective floats in the direction of the rotation axis.

Similarly to the main driving gear 10 for printing, the main driving gear 44 for skipping is provided with a positioning mechanism for positioning the missing tooth region 46 at a position facing the front of the driven gear 42 for skipping. It is constituted by a detent cam 52 and a detent lever 54.

The operation of the skip gear is such that, first, when the skip main drive gear 44 is stopped with its missing tooth region facing the skip driven gear 42, the skip driven gear 44
2 can freely rotate without meshing with the skip driven gear 44.

Then, when the skip main drive south wheel 44 is rotated by the clutch mechanism 40, the main drive cog 48 engages with the driven cog 50 to start the skip driven gear 42. Then, the main drive gear 44 for skip starts meshing, and the driven gear 42 for skip is rotated by half a rotation by rotation up to the toothless region 46.

According to such a rotation mechanism of the type drum, when either the printing main drive gear 10 or the skip main drive gear 44 is selectively driven to rotate by the clutch mechanism 40, the corresponding driven gear 12 or 42 rotates. , giving a predetermined rotation to a predetermined drum. At this time, the main drive gear that is not being driven is set at a position opposite to the toothless area (16 or 46) or the corresponding driven gear (12 or 42) by the corresponding positioning mechanism, so The driven gear rotates freely and does not interfere with the rotation of the driven driven gear.

In addition, the main driving gear 10 for printing and the driven gear 12 for printing are as follows:
A gear having the same number of teeth as shown in FIGS. 1 and 2 is used. Therefore, since the main drive gear 10 rotates twice to make the driven gear 12 half a revolution, the reduction ratio of the rotation from the motor 34 can be increased, and the main drive gear and the driven gear rotate in a one-to-one ratio. Intermediate reduction teeth compared to those l1
The number of type drum rotation mechanisms can be reduced by four
M construction can be simplified.

In this way, when the clutch gear device according to the present invention is used in a type drum rotation mechanism, power can be continuously transmitted from the main gear to the driven gear, while the rotational force of the driven gear can be transferred to the main gear. You can prevent it from reaching the gear. Therefore, the driven device 1 that rotates the active drum
Even when two types of driven gears are installed in 4, the other driven gear can be allowed to freely rotate when one drive rotates, and two types of selective driving can be performed without moving the position of the driven gear. It becomes possible to perform rotation control.

[Effects of the Invention] As explained above, according to the clutch gear device according to the present invention, free rotation of the driven gear can be obtained by the positioning mechanism and toothless area of the driving gear, and ratchet assistance of the driving gear can be obtained. Due to the action of the cog, power can be transmitted to the driven gear in the tooth-missing region, and the driven gear can be driven to rotate continuously.

This allows the transmission of power from the main gear to the driven gear,
Non-transmission of power from the driven gear to the driving gear can be reliably controlled without shifting the positions of the gears, and the configuration of the device using gear i can be simplified.

[Brief explanation of drawings]

19 Figure 1 is a perspective view showing the main +i' + Y + 戊 of the length example,
Fig. 2 is a partial explanatory diagram of the length embodiment when viewed from the heel direction, Fig. 3 is an explanatory diagram showing an example of the positioning mechanism of the embodiment, and Fig. 4 is the main part of the type drum rotation mechanism using the present invention. {1
FIG. 5 is a schematic perspective view of a skip gear used in the type drum rotation mechanism shown in FIG. 4. 10... Drive gear 12... Driven gear 14... Driven pongee 16... Missing tooth area 18... Ratchet auxiliary cog 20... Biasing spring 22... Cogs 1 and Tsupa 24... - Starting tooth 26 ... Driven auxiliary cog 30 ... Detent cam 32 ... Detent lever 20

Claims (1)

[Claims] (1) It has a main drive gear that is rotationally driven by the power from the drive source, and a driven gear that is placed in a position where it meshes with the main drive gear, is rotated by the power from the main drive gear, and transmits the rotational force to the load. The main gear has a missing tooth area in which a predetermined number of teeth have been removed to allow free rotation of the driven gear, and a toothless area that is stacked and pivotally mounted in the axial direction of the main drive gear and is offset in the axial direction from the teeth of the main drive gear. a ratchet auxiliary cog having an engaging portion at a position in which the ratchet auxiliary cog is energized so that the rotational direction position of the engaging portion of the ratchet auxiliary cog is within the toothless region;
The driven gear is provided with a cog restricting means for restricting rotation in a direction opposite to the rotation direction of the main drive gear and allowing escape rotation in the same direction as the rotation direction of the main drive gear, A starting tooth that first meshes with the main drive gear when started by the main drive gear, from which at least the tip of an adjacent tooth has been removed, and a start tooth that meshes with the ratchet auxiliary cog in the toothless region of the main drive gear during rotational drive by the main drive gear. and a driven auxiliary cog that receives rotational force from the main drive gear, and further includes a main drive gear positioning system that stops the toothless region of the main drive gear at a position facing the front of the driven gear to enable free rotation of the driven gear. a mechanism, and a driven gear positioning mechanism that stops the driven gear at a position where the starting teeth face the front of the main driving gear so that when the driven gear starts, the teeth of the main gear first mesh with the starting teeth. A clutch gear device characterized by: