JPS63101193A - Propulsion casing supporting structure for vessel propulsion machine - Google Patents

Abstract

PURPOSE:To improve the rigidity of a mount housing, by providing an integral U-shaped mount housing having right and left arm sections extending to the opposite sides of a propulsion casing and secured to a steering shaft at a lower mount section. CONSTITUTION:Mount housings 30A, 30B at a lower mount section 19 are formed integrally into U-shape and have right/left arm sections 31A, 31B extending to the opposite sides of a propulsion casing 18. A mount rubber 32 to be arranged at the opposite sides of the propulsion casing 18 is supported by said arm sections 31A, 31B. Consequently, the rigidity of the mount housings 30A, 30B can be improved, and the mount housings 30A, 30B are not deformed by the reaction of steering operation thus causing no breakdown at the lower mount section 19 nor degradation of steering feeling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a propulsion casing support structure for a marine propulsion device.

[Prior Art] A propulsion casing support structure as described in Japanese Unexamined Patent Publication No. 55-127294 is used in outboard motors and the like. This propulsion casing support structure supports a part of the propulsion casing at the upper end of the steering shaft via the upper mount part, and supports the lower part of the propulsion casing at the lower end of the steering sleeve via the lower mount part. ing.

Here, the above conventional propulsion casing support structure forms recesses for mounting the mount rubber on both sides of the propulsion casing,
A mount rubber is fitted into this mounting recess, and the side surfaces of the mount rubber are pressed down by a pair of left and right mount housings that are fastened to the steering shaft.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional propulsion casing support structure, the left and right mount housings are fastened to the steering shaft, so the rigidity of the mount housings is low and steering operation is difficult. When the reaction force acts on the mount housing from the propulsion casing via the mount rubber, the left and right mount housings open from each other, causing damage to the lower yaunt part and impairing the steering feel.

In addition, since the mount rubber is simply fitted into the mounting recesses formed on both sides of the propulsion casing, the mount rubber cannot be firmly held in the front and rear directions on the propulsion casing side. When switching, the mount rubber rattles and impact force is applied to the mount rubber, reducing its durability.

An object of the present invention is to increase the rigidity of the mount housing in the lower mount part and to firmly hold the mount rubber in the front-rear direction on the propulsion casing side.

[Means for Solving the Problems] The present invention supports the upper part of the propulsion casing at the upper end of the steering shaft via the upper mount part, and supports the upper part of the propulsion casing at the lower end of the steering shaft via the lower mount part. In the propulsion casing support structure of a marine propulsion device that supports the lower part, the lower mount part is fixed to the steering shaft and has left and right arm parts extending on both sides of the propulsion casing.The lower mount part is a U-shaped integral mount housing. and mount rubbers supported at least in the longitudinal direction by the arms of the mount housing and disposed on both sides of the propulsion casing, and the width of the mount rubber attachment part of the propulsion casing is arranged on both arms of the mount housing. It is formed smaller than the inner width of the mount rubber, and a rear positioning part of the mount rubber is formed in the propulsion casing.
The front positioning member of the mount rubber is fixed to the propulsion casing, and the mount rubber is clamped by giving a tightening margin to the mount rubber between the rear positioning part and the front positioning member.

[Function] According to the present invention, the mount housing of the lower mount portion includes left and right arm portions integrally formed in a U shape and extending on both sides of the propulsion casing, and the mount is disposed on both sides of the propulsion casing by the arm portions. Since the rubber is supported, the rigidity of the mount housing can be increased. Therefore, the mount housing will not be deformed by the reaction force of the steering operation, and the lower mount will not be damaged or the steering movement will be inhibited.

In addition, in the present invention, the width of the mount rubber attachment part in the propulsion casing is smaller than the inner width of the mount rubbers disposed on both arms of the mount housing, and the front positioning member of the mount rubber is fixed to the propulsion casing. I made it. Therefore, although the mount housing is integrated into a U-shape, by incorporating the propulsion casing from the rear of the mount housing in which the mount rubber is arranged and fixing the front positioning member to the propulsion casing, the entire lower mount part can be fixed. can be easily assembled.

Further, according to the present invention, the mount rubber is clamped by the rear positioning portion and the front positioning member with a tightening margin, so that the mount rubber can be firmly held in the front-rear direction on the propulsion casing side.

As a result, when suddenly accelerating or decelerating forward or switching between forward and backward
The mount rubber does not rattle, no impact force is applied to the mount rubber, and the durability of the mount rubber can be improved.

In addition, in the present invention, by dividing the mount housing into upper and lower parts, the mount rubber can be firmly held vertically, and the mount rubber can be prevented from falling off from the mount housing during assembly.

[Example] FIG. 1 is a cross-sectional view of the main part of the first embodiment of the present invention,
FIG. 2 is a side view showing the upper mount part, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a sectional view taken along line IV-IV of FIG. 2.
Fig. 5 is a side view showing the lower mount part, Fig. 6 is a plan view showing the lower mount part, Fig. 7 is a sectional view taken along the line ■-■ in Fig. 6, and Fig. 8 is a It is a cross-sectional view along the -■ line.

As shown in FIG. 1, the outboard motor IO has a clamp bracket 11 attached to the hull 12, and
1, a swivel bracket 14 is tiltably supported via a tilt shaft 13, and a steering shaft 15 is rotatably supported on the swivel bracket 14.

The outboard motor 10 has a steering handle 16 fixed to the upper end of the steering shaft 15 and supports the upper part of the propulsion casing 18 via an upper mount part 17 coupled to the steering handle 16.
A lower portion of the propulsion casing 18 is supported at the lower end of the propulsion casing 5 via a lower mount portion 19 .

The propulsion casing 18 has an engine 20 mounted on the top,
It includes a propeller driven by an engine 20. 21 is a drive shaft, and 22 is an exhaust pipe.

As shown in FIGS. 2 to 4, the upper mount portion 17 has an opening 1 in the propulsion casing 18 through which the drive shaft 21 passes.
A lower mount housing 23 that closes the 8A, and a mount housing 24 that is attached to the lower mount housing 23.
It has

23A is an insertion hole for the drive shaft 21 provided in the lower mount housing 23. The mount housing 23.24 holds a pair of left and right mount rubbers 25 in a sandwiched state, and is attached to the propulsion casing 18 by bolts 26. Fixed.

A base end of a connecting vibe 27 is joined to the center of each mount rubber 25, and each pipe 27 is fastened to the base end of the steering handle 16 with a bolt 28. Note that an annular seal member 29 is installed between the propulsion casing 18 and the lower mount housing 23, and a seal member 23B is installed between the drive shaft 21 and the insertion hole 23A to reliably seal the opening 18A. It looks like this.

As shown in FIGS. 5 to 8, the lower mount section 19 includes an upper mount housing 30A and a lower mount housing 30B that are divided into upper and lower parts. Each of the mount housings 30A and 30B is fixed to the lower end of the steering shaft 15 by spline connection, and
left and right arm portions 31A extending on both sides of the propulsion casing 18;
31B, forming a U-shaped integral body. In addition, 10
1 is a slit provided at the lower end of the steering shaft 15, 102A and 102B are each mount housing 3OA,
30B, which is a protrusion provided in the protrusion 102A, 1
By engaging 02B with the slit lot, each mount housing 30A, 3 is attached to the steering shaft 15.
A retaining ring 103 is used to position 0B.

Arms 31A and 3 of both mount housings 30A and 30B
1B holds from the side a pair of left and right mount rubbers 32 arranged on both sides of the propulsion casing 18, and
Rubber support parts 34A and 3 are provided with rubber support parts 33A and 33B that support the front direction, and rubber support parts 34A and 3 that support the rear direction.
Equipped with 4B. In addition, each mount housing 30A, 3
The arm parts 31A and 31B of 0B are provided with clamping parts 35A and 35B that clamp the mount rubber 32 vertically.

Both mount housings 30A and 30B are vertically fastened by bolts 36.

Further, the width of the left and right mounting portions 37 of the propulsion casing 18 for the mount rubbers 32 is formed smaller than the inner width of the mount rubbers 32 disposed on the left and right arm portions 31A, 31B of each mount housing 30A, 30B. ing.

Rear position determining portions 38 of the mount rubber 32 are formed on both sides of the propulsion casing 18.

Further, on the front side of the propulsion casing 18, a front positioning member 39 for the mount rubber 32 is attached to a port 40.
Fixed by The mount rubber 32 extends in the front-rear direction due to the vertical tightening of both mount housings 30A and 30B, and as a result, the rear positioning part 38 and the front positioning member 39 provide a tightening allowance so that the mount rubber 32 extends toward the propulsion casing 18 side. be trapped.

Note that rubber support parts 42A and 42B are formed in the center of each mount housing 30A and 30B to support the mount rubber 41 disposed on the front side of the propulsion casing 18 on both sides and in the front direction. Clamping parts 43A and 43B are formed to clamp the upper and lower parts. Further, the front positioning member 39 also includes a rubber support portion 4 that supports the mount rubber 41 on both sides and in the rear direction.
4A and 44B, and clamping parts 45A and 45B that clamp the mount rubber 41 vertically.

Next, the operation of the first embodiment will be explained.

According to the above embodiment, the mount housings 30A and 30B of the lower mount portion 19 are provided with left and right arm portions 31A and 31B that form a U-shaped integral body and extend on both sides of the propulsion casing 18. Propulsion casing 1
8, the rigidity of the mount housings 30A and 30B can be increased. Therefore, the mount housings 3OA and 30B are not deformed by the reaction force of the steering operation, and the lower mount portion 19 is not damaged and the steering feel is not impaired.

In the above embodiment, the width of the mount rubber mounting portion 37 in the propulsion casing 18 is smaller than the inner width of the mount rubber 32 disposed on both arm portions 31A, 31B of the mount housings 30A, 30B, and The forward positioning member 39 of the propelling casing 18
Fixed it to . Therefore, although the mount housings 30A and 30B are integrated into a U-shape, the propulsion casing 18 is assembled from the rear of each mount housing 30A and 30B in which the mount rubber 32 is disposed, and the front positioning member 39 is connected to the propulsion casing. By fixing to 18, the entire lower mount portion 19 can be easily assembled.

Further, according to the above embodiment, the mount rubber 32 is clamped by the rear positioning part 38 and the front positioning member 39 with a tightening margin, so that the mount rubber 32 is clamped by the rear positioning part 38 and the front positioning member 39. This allows the mount rubber 32 to be firmly held in the front-rear direction at the time of rapid forward acceleration/deceleration or when switching between forward and backward directions, and the mount rubber 32 does not shake and no impact force is applied to the mount rubber 32, improving the durability of the mount rubber 32. be able to.

In addition, in the above embodiment, both mount housings 7 and 3
Since 0A and 30B are divided, it is possible to firmly hold the mount rubber 32 vertically and prevent the mount rubber 32 from falling off from the mount housings 30A and 30B during one assembly.

FIG. 9 is a partially cutaway side view of the second embodiment of the present invention, and FIG. 10 is a cross-sectional view taken along the line X--X in FIG.

In this embodiment, 50 is an outboard motor, 51 is a hull, and 52
is a clamp bracket, 53 is a swivel bracket, 5
4 is a steering shaft, 55 is a propulsion casing, 56 is an upper mount part, 57 is a lower mount part, 58 is an engine,
59 is a propeller.

This second embodiment is substantially different from the first embodiment in that the U-shaped integral mount housing 60 of the lower mount portion 57 is not divided into upper and lower parts, and that the propulsion casing 55 and the mount housing 60 are not divided into upper and lower parts. Only the pair of left and right mount rubbers 61 are interposed between them, and the front mount rubber is not used. In addition, 62 is a mount rubber attachment part of the propulsion casing 55, 63 is a protruding mount rubber longitudinal support part provided on the mount housing 60, 64 is a mount rubber rear positioning part provided on the propulsion casing 55, and 65 is a mount rubber rear positioning part provided on the propulsion casing 5.
This is a mount rubber front positioning member fixed to 5.

[Effects of the Invention] As described above, according to the present invention, the mount housing of the lower mount portion includes left and right arm portions that form a U-shaped integral body and extend on both sides of the propulsion casing.

Since the arm portions support the mount rubbers disposed on both sides of the propulsion casing, the rigidity of the mount housing can be increased. Therefore, the mount housing will not be deformed by the reaction force of steering operation.
There is no damage to the lower mount and no interference with steering feel.

In addition, in the present invention, the width of the Yaun rubber attachment part in the propulsion casing is smaller than the inner width of the mount rubber disposed on both arms of the mount housing, and the front positioning member of the mount rubber is fixed to the propulsion casing. did. Therefore, although the mount housing is integrated into a U-shape, by incorporating the propulsion casing from the rear of the mount housing in which the mount rubber is arranged and fixing the front positioning member to the propulsion casing, the entire lower mount part can be fixed. can be easily assembled.

Further, according to the present invention, the mount rubber is clamped by the rear positioning portion and the front positioning member with a tightening margin, so that the mount rubber can be firmly held in the front-rear direction on the propulsion casing side.

As a result, when suddenly accelerating or decelerating forward or switching between forward and backward
The mount rubber does not rattle, no impact force is applied to the mount rubber, and the durability of the mount rubber can be improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of the first embodiment of the present invention;
FIG. 2 is a side view showing the upper mount part, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a sectional view taken along line IV-IV of FIG. 2.
Fig. 5 is a side view showing the lower mount part, Fig. 6 is a plan view showing the lower mount part, Fig. 7 is a sectional view taken along the line ■-■ in Fig. 6, and Fig. 8 is a - Cross-sectional view along the Vl line, No. 9
The figure is a partially cutaway side view of the second embodiment of the present invention, and FIG. 10 is a cross-sectional view taken along the line X--X of the second embodiment. 10... Outboard motor, 15... Steering shaft, 17.
... Upper mount part, 1B... Propulsion casing, 19.
...Lower mount part, 30A...Upper mount housing, 30B...Lower mount housing, 32...Mount rubber, 33A, 33B, 34A, 34B...Rubber support part, 35A, 35B...Pinch Stop, 36...
Bolt, 37... Mounting part, 38... Rear positioning part, 39... Front positioning member, 50... Outboard motor, 5
4... Steering shaft, 55... Propulsion casing,
56... Upper mount part, 57... Lower mount part, 6
0...Mount housing, 61...Mount rubber, 62...Mounting part, 63...Anteroposterior support part, 6
4... Rear positioning part, 65... Front positioning member. Agent Patent Attorney Osamu Shiokawa Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (2)

[Claims] (1) Supporting the propulsion casing of a marine propulsion device by supporting the upper part of the propulsion casing at the upper end of the steering shaft via the upper mount part, and supporting the lower part of the propulsion casing at the lower end of the steering shaft via the lower mount part In structure, the lower mount part includes a mount housing that is fixed to the steering shaft and has left and right arms extending on both sides of the propulsion casing to form a U-shaped integral body. The propulsion casing is equipped with mount rubbers that are supported in the direction and placed on both sides of the propulsion casing, and the width of the mount rubber attachment part of the propulsion casing is formed smaller than the inner width of the mount rubbers arranged on both arms of the mount housing. A rear positioning part of the mount rubber is formed at the rear positioning part of the mount rubber, a front positioning member of the mount rubber is fixed to the propulsion casing, and the mount rubber is clamped by giving a tightening margin to the mount rubber between the rear positioning part and the front positioning member. Characteristic propulsion casing support structure for marine propulsion equipment. (2) In claim 1, the mount housing is divided into upper and lower parts, the upper and lower mount housings are provided with clamping parts that clamp the mount rubber in the vertical direction, and the upper and lower mount housings are bolted together in the vertical direction. Propulsion casing support structure for marine propulsion equipment.