JPS5922364Y2 - Forward/reverse transmission mission - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a forward/reverse transmission transmission used in a marine reduction/reversing gear.

As a clutch used in the above-mentioned forward/reverse transmission transmission, the clutch body is fitted with a threaded spline to the forward/reverse shaft, and the axial thrust generated by the threaded spline is applied to the clutch body. There are devices that securely connect the gear train to the forward and reverse shafts,
According to this, compared to a dog-type clutch, there is no noise generated when the dogs engage with each other, and there is no worry about damage to the dogs, and compared to a friction plate-type clutch, there is no need for friction plates, which reduces costs. Although it has the advantage that a compact type can be used and the entire transmission transmission is miniaturized, the rotation direction of the transmission transmission toward the input shaft may be reversed depending on the rotation of the prime mover or the overall configuration of the machine. In this case, the axial thrust of the clutch body given by the threaded spline acts in a direction to disengage each gear train, so that the clutch function is lost.

Therefore, it becomes necessary to change the arrangement of the forward and reverse gear trains in the transmission transmission.

The present invention was devised to deal with such inconveniences, and when converting the gear train for differences in the rotation direction caused by the rotation direction of the prime mover or the overall machine configuration, the same Transmission transmissions of two specifications can be obtained with extremely simple work using component parts.

The objective is to provide a forward/reverse transmission transmission with excellent productivity and handling.

Hereinafter, this will be explained in detail with reference to the attached drawings, which are shown as one specific example. Figs. 1 and 2 show the unfolded cross-sectional state of the forward and reverse transmission transmission according to the present invention, and Fig. 3 shows the essential parts of the gear meshing state. Showing the side.

M is a split Kennis consisting of a main body 1 and a lid 2, bearings 3,
3. 4 and 4 respectively rotatably support the input shaft 6 and the forward/reverse rotation shaft 7, and install and support the idle shaft 8 in parallel thereto.

The extending portion of the input shaft 6 from the lid body 2 is connected via a damper 9 to the output shaft of a prime mover (not shown) so that the power can be switched off and on, and the extending portion of the forward/reverse rotation shaft 7 from the main body 1 is provided with a flange. 1
The driven shaft 11 is connected through 0.

Inside the mission case M that supports these shafts 6, 7, and 8, a gear transmission mechanism is constructed as follows.

Input gears 12 and 13 are installed on the input shaft 6 at predetermined intervals, and idling gears 14 and 16 are installed on the forward and reverse shafts 7 with bearings 17.
The input gears 12 and 13 are installed so that they can freely rotate, and are prevented from moving in the axial direction by spacers 18 and 19.

Further, a reversing gear 15 is installed on the idle shaft 8 so that movement in the axial direction is prevented by a flange 20 and a spacer 21 and freely rotated by a bearing 22.

Therefore, the forward rotation gear train A is constituted by the input gear 12 and the idling gear 14 constantly meshing, and the input gear 13 and the reverse rotation gear 15
A reversing gear train B is constituted by constant meshing with the idling gear 16 via.

A forward/reverse shaft 7 is provided between the idle gears 14 and 16.
A clutch body 29 is installed which is movable in the axial direction by a double spline fitting 28 and has a joint portion 30, 31 formed on the outer periphery of the clutch body 29.
A bulge is formed on the opposite sides of the bulge, and joint portions 26 and 27 are provided inside the bulge.

Therefore, due to the engagement of the joint portion 30.31 of the clutch body 29 and the joint portion 26.27 of the idling gear 14.16, the idling gear 14.16, that is, the forward/reverse gear train A
, B are connected to the forward/reverse rotation shaft 7.

The clutch body 29 has a shifter 3 that fits into its engagement groove 32.
3, the switching operation is performed selectively to the neutral position P, the joining position P1 of the forward gear train A, and the joining position P2 of the reverse gear train B.

In the above-mentioned forward/reverse transmission mission, if the power transmitted to the input shaft 6 rotates in the direction of arrow A, depending on the rotational direction of the prime mover and the related configuration of the entire machine, the forward/reverse gear trains A and B are shown in FIG. The arrangement is as shown in FIG. 4, and when power is transmitted to the input shaft 6 in this configuration, the input gear 1
2.13 also rotates in the A direction, and the normal rotation gear train A is the idling gear 1.
4 rotates in the direction of the arrow, and the reverse gear train B rotates in the direction of the arrow at the idle gear 16.

If the clutch body 29 is in the neutral position P in this state, each gear train A, B will only idle with respect to the forward/reverse rotation shaft 7.
When power is not transmitted to the forward/reverse rotation shaft 7 and the driven shaft 11 is driven in the forward rotation direction, if an operating force in the direction of the arrow is applied to the shifter 33,
The clutch body 29 is moved in the same direction by the screw spline fitting 28, and is located at the joining position P1, and the said joining part 30
26, the power transmitted to the idle gear 14 is transmitted to the clutch body 29, and is transmitted to the forward/reverse rotation shaft 7 through the threaded spline fitting 28, causing the shaft 7 to rotate forward in the direction of the arrow. Therefore, the driven shaft 11 is driven in normal rotation.

While this clutch body 29 is held at the engagement position P1,
Due to the action of the female spline fitting 28, the clutch body 29
Since a thrust is generated to move the shaft in the direction of the arrow, the surface joints 30.26 remain reliably connected, and the driven shaft 11 is reliably driven.

When driving the driven shaft 11 in the reverse direction, if the clutch body 29 is operated to the engagement position P2 by the shifter 33, the engagement of the engagement portion 31.27 causes the rotation of the idle gear 16 in the opposite direction of the arrow. is transmitted to the forward/reverse rotation shaft 7 via the clutch body 29, and when this joint 31.27 is engaged, the rotation direction is opposite to that described above. clutch body 28
Since the thrust received by is in the opposite direction of the arrow, the surface joint part 31
, 27 remain reliably engaged and reliably drive the driven shaft 11 in the reverse direction.

In particular, the above-mentioned forward/reverse transmission transmission according to the present invention adopts the following configuration in consideration of the case where the input shaft 6 is attached to a prime mover that rotates in the direction opposite to the arrow. .

That is, the input gears 12 and 13 installed on the input shaft 6 have the same diameter.
The idle shaft 8 is supported on both sides by the transmission case M, and the reverse gear 1 is
You can freely transfer every 5 points.

This allows the transmission transmission shown in FIGS. 1 and 4 to be centered on the clutch body 29 as shown in FIG.
The reversing gear trains A and B are interchanged, that is, the idling gear 14 is installed on the idling gear 16 side on the forward/reversing shaft 7, and the idling gear 16 is installed on the idling gear 14 side, and at the same time The idle shaft 8 is changed with the reversing gear 15 installed, and the manual gears 12 and 13 have the same diameter.
Since they are configured with the same tooth profile, the forward and reverse gear train A after replacement.

It is possible to replace the forward and reverse gear trains by using the same component parts without any problem in the meshing interlocking of B, and it is possible to obtain a forward and reverse transmission transmission adapted to the difference in the direction of rotation of the input shaft 6 described above. It can be done.

In the forward/reverse transmission mission shown in FIG. 5 after the replacement, the input shaft 6 rotates in the direction opposite to the arrow A, but in the forward rotation gear train A, the rotation direction of the idle gear 14 is opposite to the direction indicated by the arrow A. In the forward direction, the reverse gear train B also has its idle gear 16.
The direction of rotation is the direction of the arrow, and as a result, the clutch body 29
The relationship between each rotation direction and the threaded spline fitting 28 is the same as before replacement, such as the idling gear installed on the left side facing the arrow, and the idling gear installed on the right side facing the opposite direction. Since they are maintained in the same manner, the joint 30 of the clutch body 29 and the joint 27 of the idling gear 16 are held together, and the joint 31 of the clutch body 29 and the joint 26 of the idling gear 14 are secured. On the other hand, since the clutch body 29 receives thrust in the direction of engagement, the power in the forward and reverse directions is reliably transmitted to the driven shaft 11.
It is transmitted to

As explained above, in the present invention, the input shaft 6 and the forward/reverse shaft 7 are supported by the split case M, and the input shaft 6 is connected to the manual gear 1.
2.13 are installed at intervals in the axial direction, and include an idling gear 14 that constantly meshes with the input gear 12 on the forward/reverse shaft 7, and an idling gear 16 that always meshes with the manual gear 13 via the reversing gear 15. are installed to constitute a forward rotation gear train A and a reverse rotation gear train B, and each gear train A, B is connected to the forward rotation shaft 7 by a clutch body 29 which is movable in the axial direction by a threaded spline fitting 28. In the forward/reverse transmission transmission equipped with a clutch for selectively connecting the input gears 12 and 13, the input gears 12 and 13 are configured to have the same diameter and the same tooth shape, and the idle shaft 8 on which the reversing gear 15 is installed is set so that both sides are connected to the split case M. The input gear 12 or 13 can be engaged with the reverse gear 15 by holding the input gear 12 or 13, and can be freely switched between the forward gear train A and the reverse gear train B around the clutch body 29. Therefore, a forward/reverse transmission transmission employing a threaded spline type clutch is designed to apply a thrust in the direction of clutch engagement to the clutch body 29 using the threaded spline in the planned rotational direction of the input shaft. For example, even if a rotation direction opposite to the intended rotation direction is input due to the configuration of the prime mover or the entire machine, for example, a reverse gear train may be attached between the prime mover or the transmission. By simply recombining the component parts of a forward/reverse transmission transmission without requiring a special mechanism to return it to the planned direction of rotation, you can obtain a forward/reverse transmission transmission that is compatible with the direction of rotation that is manually input. be.

In this way, in a forward/reverse transmission transmission using a threaded spline type clutch, when it is connected to a prime mover, etc., the input rotation direction is not limited, providing excellent productivity and ease of handling after the fact. It has come to this.

[Brief explanation of the drawing]

The drawings show a specific example of the present invention. Figures 1 and 2 are developed cross-sectional views of the forward and reverse transmission transmission according to the present invention, Figure 3 is a side view of essential parts in gear meshing state, and Figure 4 , FIG. 5 is a main part explanatory view showing a state in which the normal gear train A and the reverse gear train B are interchanged. M...Mission case, 6...Input shaft, 7...Forward/reverse axis, 8...Idle axis, 11...Driven Axis, 12, 13...
・Input gear, 14.16... Idle gear, 15.
...Reverse gear, A...Forward gear train, B.
... Reverse gear train, 26, 27 ... Joint part of idle gears 14 and 16, 28 ... Threaded spline fitting part, 29 ... Clutch body , 30.31・
...Joint portion of clutch body 29, 33...
Shifter, P... Neutral position, Pl...
Joint position of forward gear train A, P2... joint position of reverse gear train B.

Claims (1)

[Scope of utility model registration request] The input shaft 6 and the forward/reverse shaft 7 are supported in a split case M, and manual gears 12 and 13 are installed on the input shaft 6 at intervals in the axial direction.
An idling gear 14 that constantly meshes with the input gear 12 on the forward/reverse shaft 7
In addition, an idling gear 16 that constantly meshes with the input gear 13 and the reverse gear 15 is installed to constitute a forward rotation gear train A and a reverse rotation gear train B, and the forward and reverse rotation shaft 7 is provided with a threaded spline. Clutch body 2 that can be moved in the axial direction by fitting 28
In a forward/reverse transmission mission equipped with a clutch for selectively connecting gear trains A and B with 9, the input gear 1
2 and 13 are configured to have the same diameter and the same tooth shape, and the idle shaft 8 on which the reversing gear 15 is installed is supported on both sides with respect to the split case M, so that either of the input gears 12 and 13 is configured to have the same diameter and the same tooth shape. This forward/reverse transmission transmission is characterized in that the forward rotation gear train A and the reverse rotation gear train B are freely interchangeable around the clutch body 29 so as to be able to mesh with the gear 15.