JPH022089Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bearing holding device for a rotational balancer of a horizontal engine, and provides a bearing holding device that can be easily and quickly held down and can be positioned extremely accurately.

The present invention has, for example, the third
4 or 4.

That is, a gear case mounting seat 3 is provided protrudingly on the horizontal side wall 2 of the crankcase 1 of the horizontal engine E, and balancer bearing holes 5 are bored at two locations above and below the rear of the horizontal side wall 2 inside the gear case mounting seat 4. Each rotating balancer 6 is inserted into the crankcase 1 through the balancer bearing hole 5.

Then, a bearing 7 and a gear 8 are fixed to a portion near the lateral end of each rotational balancer 6 at an appropriate distance between the inner and outer sides in the left-right direction, and the outer race 1 of each bearing 7 is fixed.
0 is fitted and supported in each balancer bearing hole 5, and a bolt 1 is attached to the outer surface of the side wall 2 near both balancer bearing holes 5.
By fixing the bearing holder 12 at 1 and bringing the respective holder parts 14 provided at the top and bottom of the bearing holder 12 into contact with the outer end surface 16 of each outer race 10, the bearing 7 is pulled out laterally and outwardly from the balancer bearing hole 5. The present invention relates to a bearing holding device for a rotational balancer of a horizontal engine configured to prevent such problems.

As shown in FIG. 4, the conventional bearing holding device is installed in a narrow triangular area 70 surrounded by a balancer bearing hole 5 and a crank bearing boss 50, which are arranged in two places, upper and lower, on a horizontal side wall 2. A bearing presser 12 is pivotally supported by a bolt 11, and a receiving part 80 for receiving the presser is separately fixed to the horizontal side wall 2.

Then, the bearing retainer 12 is temporarily tightened to the release position B in which it exits from the outer peripheral edge 22 of the balancer bearing hole, and after each of the upper and lower rotating balancers 6 is inserted into the crankcase, the above-mentioned triangular portion 70 is inserted with a finger.
Slide operation along long hole 60 and bolt 1
1, the bearing presser 12 is fixed in the presser position A, and the rotational balancer 6 is pivotally fixed in the crankcase.

Therefore, in the above configuration, when changing the posture of the bearing holder 12, complicated manual operations of the above-mentioned sliding and rotation are required, which requires time and effort to fix the rotational balancer, and furthermore, manual operation is not possible in a narrow space. This made it difficult to move the fingers and made it difficult to accurately position the bearing.

In addition, a receiving portion 80 for positioning and fixing the bearing holder must be provided separately, which requires time and effort to mold the crankcase, leading to an increase in costs.

The present invention solves the above problems, and automatically holds the bearing in place.
The purpose is to perform positioning accurately and easily.

In order to achieve the above object, the present invention has the bearing holding device configured as shown in FIGS. 1 to 3, for example.

That is, the bearing retainer 12 has an insertion hole 17 formed at its intermediate height, and a retainer portion 14 and an insertion hole 17 located at two positions above and below the front side of the insertion hole 17.
A stopper part 18 located at the lower part of the rear side, and a central part of a triangular wall part 19 surrounded by both balancer bearing holes 5 of the horizontal side wall 2 and the rear part of the gear case mounting seat 3. Screw hole 21 in 20
form.

Then, the bearing holder 12 is brought into contact with this triangular wall surface portion 19, and the leg portion 16 of the bolt 11 is inserted into the insertion hole 17 and screwed into the screw hole 21, thereby attaching the bearing holder 12 to the triangular wall surface portion 19. The bearing retainer 12 can be fixed freely, and has a retaining position A in which the upper and lower retainer parts 14 protrude into the outer circumferential edge 22 of the balancer bearing hole 5, and a holding position A in which the upper and lower retainer parts 14 protrude into the outer circumferential edge 22 of the balancer bearing hole 5. The configuration is configured such that the position can be freely switched between the release position B and the release position B, in which the presser foot position A is held, and the stopper part 18 is received by the gear case mounting seat 3, and the stopper part 18 is inserted into the outer peripheral edge 22 of the bearing hole 5 of both presser parts 14. This is to determine the entry position.

Therefore, to describe its functions, bearing presser 1
2 into the release position 13, and then insert the balancer 16 into the crankcase 1 through the balancer bearing hole 5. When the bolt 11 is loosened, the bearing retainer 12 tightens the bolt by the weight of the retainer 14 that protrudes downward. At the same time, the stopper part 18 located at the rear lower part of the bolt insertion hole 17 is received by the gear case mounting seat 3, so that the presser position A can be precisely fixed.

Since the present invention is configured and operates as described above, it has the following effects.

First, after inserting the balancer into the crankcase, when you loosen the bolt of the bearing holder that has been temporarily tightened in the relief position, the center of gravity of the balancer shifts from the bolt insertion center and is tilted toward the protruding holder, so the bearing The presser foot automatically rotates around the bolt to the presser position, which eliminates the need to insert your fingers into a narrow space where gears are crowded to rotate the bearing presser, making it extremely simple and convenient. Allows quick presser operation.

In addition, the rotated bearing holder is received by the gear case mounting seat by the stopper located at the rear and lower part of the insertion hole, and is positioned and fixed in an appropriate holding position. This eliminates the need for adjusting the bearing presser for each operation, allowing for more accurate and easier positioning operations.

Further, in the present invention, there is no need to separately form a receiving part for the bearing holder, and the gear case mounting seat can also be used as this receiving part, so the overall structure can be simplified and can be implemented at low cost.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a cutaway right side view of the horizontal diesel engine, Figure 2 is a cross-sectional view of the main parts around the balancer,
FIG. 3 is a cross-sectional view taken along the - line in FIG.
0 and a fuel tank 31 are mounted on the left and right sides, a cylinder 32 is arranged in the center of the interior, and a piston 34 interlocked with a crankshaft 35 via a connecting rod 33 is fitted into the cylinder 32 so as to be slidable in the horizontal direction. .

A gear case mounting seat 3 is provided protrudingly on the horizontal side wall 2 of the crankcase 1, and a gear case 36 is removably fitted to the mounting seat 3, and the horizontal side wall 2 and the gear case 3
6, a gear chamber 37 is formed between the two.

Then, balancer bearing holes 5 are opened in two places, upper and lower, in the rear part of the horizontal side wall 2 located in the gear chamber 37, and each pair of upper and lower rotating balancers 6 is inserted into the crankcase 1 through the balancer bearing holes 5, and the above-mentioned bearings are inserted into the crankcase 1 through the balancer bearing holes 5. A balancer 6 is supported by being fitted into the hole 5 and is mounted on the shaft across both the front and rear bearings 7.

The front ends of both balancers 6 project into the gear chamber 37 to pivotally support the gear 8, mesh with each other, and are interlocked with the crank gear 38 via the timing gear 39.

On the other hand, a screw hole 21 is formed in the central portion 20 of the triangular wall surface portion 19 surrounded by both balancer bearing holes 5 and the rear side portion of the gear case mounting seat 3 of the horizontal side wall 2, and the bolt 11 is inserted through the screw hole 21. The bearing presser 12 is pivotally supported.

The bearing retainer 12 has a bolt insertion hole 17 formed at its middle height, has retainer portions 14 protruding from two upper and lower locations on the front side of the insertion hole 17, and has an end edge 25 extending between both retainer portions 14 through which a bolt is inserted. It is formed by recessing it toward the hole.

Further, the rear end edge 26 of the insertion hole 17 is formed straight in the vertical direction, and the lower part thereof is cut diagonally downward to the front to provide the stopper part 18.

Then, the bolt 11 is passed through the insertion hole 17 of the bearing holder 12, and the leg part 16 is screwed into the screw hole 21 made in the horizontal side wall 2.
is supported rotatably around the bolt 11.

That is, the upper and lower bearings 7 that support the balancer 6
When the balancer presser foot 12 is rotated toward the outer race 10, each presser portion 14 enters into the outer end surface 16 of the outer race from the outer peripheral edge 22 of the bearing hole and assumes the presser position A (see the imaginary line in FIG. 3). ,vice versa,
When the bearing retainer 12 is rotated in a direction to remove it from the upper and lower outer races, it moves out of the outer periphery 22 of the balancer bearing hole and is in release position B (solid line position in Fig. 3).
becomes.

In this case, the bearing presser 12 is in the presser position A.
In this case, the stopper part 18 is received by the gear case mounting wall 4, and the plunge position into the outer peripheral edge 22 of the bearing hole 5 can be determined. By being in contact with the portion 28, the exit position from the outer peripheral edge 22 can be determined.

Therefore, to explain the function of the bearing presser device here, when the bearing presser 12 is rotated to release position B, the rear end edge 26 comes into contact with the boss portion 28 of the gear case mounting seat 3, so that the release operation is automatically performed. can be done. Moreover, when the bolt 11 is loosened after inserting the balancer 6 into the crankcase, the center of gravity shifts toward the presser part due to the presser part 14 protruding on both sides of the recessed edge 25. A moment acts in the direction of pushing into the outer circumferential edge 22 of the bearing hole, and the presser operation can be performed automatically.

In other words, in this embodiment, there is no need to manually operate the bearing presser 12 by inserting a finger into a narrow space, and the postures of the presser foot A and release position B can be automatically switched. Swinging can be performed more easily and quickly.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a cutaway right side view of the main part of a horizontal diesel engine, FIG. 2 is a cross-sectional view of the main part around the balancer, and FIG.
This figure is a sectional view taken along the line -- in FIG. 2, and FIG. 4 is a view corresponding to FIG. 3 showing a conventional example. 1...Crankcase, 2...Horizontal wall, 3...
Gear case mounting seat, 4... Gear case mounting wall, 4
... Balancer bearing hole, 6 ... Rotating balancer, 7 ...
... Bearing, 8 ... Gear, 10 ... Outer race, 11 ... Bolt, 12 ... Bearing holder,
14... 12 presser parts, 16... 10 outer end surfaces,
17...Insertion hole, 18...12 stopper part,
19...triangular wall part, 20...center part,
21...screw hole, 22...outer periphery of 5, 25...
Edge of 12, A...12 presser posture, B...12
Escape attitude, E...horizontal engine.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A gear case mounting seat 3 is provided protruding from the side wall 2 of the crankcase 1 of the horizontal engine E, and balancer bearing holes are provided at two locations above and below at the rear of the side wall 2 inside the gear case mounting wall 4. 5, insert each pair of upper and lower rotating balancers 6 into the crankcase 1 through the balancer bearing holes 5, and place the bearings 7 and gears 8 near the lateral ends of each rotating balancer 6 at an appropriate distance in the left and right directions. The outer race 10 of each bearing 7 is fitted and supported in each balancer bearing hole 5, and a bearing holder 12 is fixed with bolts 11 to the outer surface of the side wall 2 near both balancer bearing holes 5. The bearing 7
In a bearing holding device for a rotating balancer of a horizontal engine configured to prevent the balancer from slipping out laterally outward from the balancer bearing hole 5, the bearing holding device 12 has an insertion hole 17 formed at an intermediate height portion thereof and It has a presser part 14 located at two upper and lower positions on the front side and a stopper part 18 located at the lower part of the rear side of the insertion hole 17, and is located behind both balancer bearing holes 5 and the gear case mounting seat 3 in the horizontal side wall 2. A screw hole 21 is provided in the center portion 20 of the triangular wall portion 19 surrounded by the side portions.
, the bearing presser 12 is brought into contact with the triangular wall surface portion 19 , and the leg portion 16 of the bolt 11 is inserted into the insertion hole 17 and screwed into the screw hole 21 .
9, and the bearing presser 12 has two positions: a holding position A in which the upper and lower holding parts 14 protrude into the outer circumferential edge 22 of the balancer bearing hole 5, and a holding position A in which the upper and lower holding parts 14 push into the outer peripheral edge 22 of the balancer bearing hole 5, and a holding position A in which the upper and lower holding parts 14 are swung upward with the bolt 11 as a fulcrum and released. The configuration is configured such that the posture can be freely switched to a relief posture B in which the periphery 22 exits, and in the presser posture A, the stopper portion 18 is received by the gear case mounting seat 3, and both presser portions 1
Bearing holding device 2 for a rotational balancer for a horizontal engine, characterized in that it is configured to position the position of entry into the outer circumferential edge 22 of the bearing hole 5 of No. 4. In the balancer bearing holding device,
The edge 25 of the bearing presser 12 extending between both presser parts 14 is recessed in the direction away from the outer peripheral edge 22 of the bearing hole 5.