CN1184409C

CN1184409C - Crank lubricating device

Info

Publication number: CN1184409C
Application number: CNB011255129A
Authority: CN
Inventors: 郡司透
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2000-08-07
Filing date: 2001-08-07
Publication date: 2005-01-12
Anticipated expiration: 2021-08-07
Also published as: BR0103908B1; JP3824475B2; KR20020012517A; JP2002054419A; KR100385262B1; CN1337521A; BR0103908A

Abstract

The invention provides a crank lubricating device. An inner race 22 of a ball bearing 12 is allowed to abut on a bearing contact part 25 formed in a side surface of a web 3 and positioned, and a groove for containing a base part 20 having a width (d) slightly larger than a plate thickness (t) of the base part 20 of the filter plate 11 is formed between the ball bearing 12 and a base part containing part 26 formed in the side surface of the web 3. The filter plate 11 forms a disk spring, and its base part 20 is overhanging set on a thick diameter step part 24 in a free state before abutting on the ball bearing 12.

Description

Crank lubricating device

Technical field

The present invention relates to a kind of bent axle, particularly relate to a kind of bent axle that can keep bearing accuracy accurately with centrifugal filter with centrifugal filter.

Background technique

Fig. 3 has shown the structure at the bent axle with centrifugal filter described in the real public clear 60-6577 communique.Bent axle 1 is made of axle journal 2, crankweb 3 and crank pin 4; Be provided with by being located at the

oil circuit

5,6 on the axle journal 2 and being located at the pressure oil circuit that the oil circuit 7 on the crank pin 4 is constituted; Forcibly supply with oil plant from oil pump portion, from the oilhole 4a that is located on the crank pin 4 bearing portion 9 grades of connecting rod 8 are lubricated then.

Between the side of crankweb 3 and the axle journal wall 14 faced mutually therewith, be provided with and the centrifugal filter 10 of forcing oil circuit to be connected again; One one of wall portion who forms this centrifugal filter 10 is made of the filter plate 11 that is roughly cone-shaped.The base portion 20 of filter plate 11 is crimped and is supported between crankweb 3 and the ball bearing 12, and the outer circumferential side end is covered with the opening portion of oil circuit 7, and connects airtight mutually with the circumferential lateral surface of crankweb 3.Ball bearing 12 is pressed on the both sides of the outer circumferential face of axle journal 2 and axle journal wall 14.Again, the symbol 13 among the figure is bearing on the opposite side of crankweb 3 in clamping, and 15 is cylinder body, and 16 is the cylinder liner, and 17 is piston.

But, as mentioned above, with the base portion of filter plate 11 when being clamped in the situation of fixing between crankweb 3 and the ball bearing 12 because the thickness of slab of filter plate 11 is inhomogeneous, can make the rotation surface of ball bearing 12 produce the changing of the relative positions.Fig. 4 has shown the occurring principle of this rotation surface changing of the relative positions.Fig. 4 magnifying show to the support structure of the base portion of filter plate 11; Fig. 4 A is thicker occasion to the thickness of slab of filter plate 11, and Fig. 4 B shows with the size of exaggeration respectively for thin occasion the thickness of slab of filter plate 11.

That is, ball bearing 12 is made of the outer ball race 21 that is pressed into axle journal wall 14 sides, the interior ball race 22 and the ball 23 that are pressed on the axle journal 2; When the base portion 20 of filter plate 11 was being fixed in crimping between the position of bearings of crankweb 3 limitation part 3a and interior ball race 22, interior ball race 22 can be subjected to the inhomogeneous influence that produces because of the thickness of slab of filter plate 11 with respect to the fixed position of axle journal 2.On the other hand, outer ball race 21 is certain with respect to the fixed position of axle journal wall 14.

Therefore, shown in Fig. 4 A, when the thickness ratio reference value of filter plate 11 want thicker the time, interior ball race 22 can be correspondingly to the direction shown in the arrow, i.e. the right generation changing of the relative positions of figure, make interior ball race 22 and outside produce size a between the center line separately of ball race 21 the changing of the relative positions, and this can cause the changing of the relative positions as the rotation surface of the changing of the relative positions between the inside and outside rotation surface of ball 23.On the other hand, shown in Fig. 4 B, want thinner occasion in the thickness ratio reference value, because interior ball race 22 correspondingly can be to the direction shown in the arrow, promptly the left of figure is to producing the changing of the relative positions, so interior ball race 22 and outside be that the mode of size b produces the changing of the relative positions between ball base Figure 21 with separately centreline space, thereby cause the changing of the relative positions of rotation surface.

Therefore, textural in the support to the base portion 20 of such filter plate 11, except the tolerance of centrifugal filter 10 self, the thickness of slab tolerance of filter plate 11 has also been added up to; And,, just be difficult to keep accurately the rotation surface of ball bearing 12 so need only the structure that employing utilizes the base portion 20 of 12 pairs of filter plates 11 of ball bearing to fix owing to set the JIS specification tolerance of thickness of slab bigger.But concerning the bearing of the bent axle of high speed rotating, be that requirement can be kept rotation surface accurately originally.Therefore, the objective of the invention is,, but still can keep the crank lubricating device of the rotation surface of bearing accurately although a kind of centrifugal filter that is provided with is provided.

Summary of the invention

For solving above-mentioned problem, crank lubricating device of the present invention has following formation: be provided with centrifugal filter between crankweb one side of bent axle and the axle journal wall faced mutually therewith, be connected with pressure oil circuit on being formed at bent axle; And, the base portion outside of the filter plate that forms this centrifugal filter and the bearing inner side surface generation of bent axle are connected airtight; It is characterized in that: the outer circumferential side at the bearing contacting part that is formed at the crankweb side forms the base portion accommodation section, makes the direct contact bearing contacting part of bearing inner side surface, and is connecting airtight the base portion of above-mentioned filter plate at the outer circumferential side of this bearing contacting part; And, under this state, the base portion of above-mentioned filter plate is accommodated above-mentioned base portion accommodation section, between the base portion of this filter plate and above-mentioned crankweb, form the gap.

According to the present invention, interior perimembranous in making the bearing inner side surface and the direct contacted while of bearing contacting part that is formed on the crankweb side, because the base portion of filter plate is connected airtight mutually with the bearing inner side surface on the outer circumferential side of this bearing contacting part, and and the crankweb side between be formed with the gap, so the position of bearing is determined and can be realized by the bearing contacting part of crankweb, the Location accuracy of thickness of slab and bearing of the base portion of filter plate is had nothing to do.Therefore, inhomogeneous even the thickness of slab of filter plate exists, also can not influence the rotation surface of bearing.Consequently, although the adjacent ground connection with bearing of centrifugal filter is being provided with, still can prevent the changing of the relative positions of the rotation surface of bearing, thereby keep rotation surface accurately.

Owing to when filter plate is formed the belleville spring shape, can base portion be connected airtight mutually with bearing, can also be to force the centrifugal filter of the part of oil circuit thickly to cover to the while with filter plate liquid again.

Description of drawings

Fig. 1 is the amplification profile diagram of embodiment's bent axle.

Fig. 2 is the amplification profile diagram that has shown the state before fixing centrifugal filtration plate.

Fig. 3 is the sectional view that has shown the bent axle part of conventional example.

Fig. 4 is the occurring principle figure of the rotation surface changing of the relative positions of bearing.

Embodiment

Below, according to drawing one embodiment is described.Fig. 1 be with the bearing contact segment magnifying show of bent axle, with the corresponding figure of Fig. 3.Fig. 2 has shown the part amplification profile diagram that filter plate is connected airtight the state before on the bearing.Again, in the present embodiment, owing to the support structure that has been to change filter plate with respect to its main difference of above-mentioned conventional example, so use common symbol, simultaneously the part except that filter plate and bearing construction is omitted its explanation in principle, but quote the explanation in the above-mentioned conventional example.

In Fig. 1, ball bearing 12 is pressed into outer ball race 21 on the axle journal wall 14, and simultaneously interior ball race 22 loosely is supported in the wide section portion 24 that is formed on the axle journal 2.To the location of this ball bearing 12, by nut 33 being attached on the screw section 32 of axle head, and between the side of packing ring 30 and crankweb 3, obtain the location through packing ring on the axle journal 2 30 and gear 31.

Filter plate 11 is covered with the opening end of oil circuit 7, and between the side of crankweb 3 and axle journal wall of facing mutually with it 14 and ball bearing 12 centrifugal filter 10 is cut apart.Again, the details to filter plate 11 will be described hereinafter.

Be located at clamping and the ball bearing 13 of the axle journal 2 on the opposite side of crankweb 3 outer ball race 34 is pressed into axle journal wall 14, and interior ball race 35 is pressed onto on the large diameter part 37 of axle journal 2.Symbol 36 is a ball.

Fig. 2 has shown the details of filter plate 11 and other mounting construction.Filter plate 11 is made by rubber-like suitable metals such as iron, and is become to the mode of the outstanding basic cone-shaped of ball bearing 12 directions with its central part and formed by suitable method such as compression moulding.

Its base portion 20 bends to stepped, during not with ball bearing 12 contacted free states, is projected into the top of wide section portion 24 at it; And when outside interior ball race 22, being embedded into installment state in the wide section portion 24, this base portion 20 is pressed in the mode that produces resiliently deformable towards the side surface direction of crankweb 3 with ball bearing 12.

On the part that the inner side surface with interior ball race 22 of crankweb 3 is faced mutually, be formed with base portion accommodation section 26 as annular recessed portion.Between the inner side surface of this base portion accommodation section 26 and interior ball race 22, be formed with the groove of accommodating base portion 20.In this groove, accommodating bulged-in base portion 20 by the inner side surface of interior ball race 22.

On the side of crankweb 3, on interior all sides of base portion accommodation section 26, be formed with bearing contacting part 25.Bearing contacting part 25 is as will being formed by cutting further for the recess of the ring-type on the outer fix towards being formed at than base portion accommodation section 26 of wide section portion 24 directions.Bearing contacting part 25 is the parts by directly contacting and position with the inner side surface of interior ball race 22.

Bearing contacting part 25 and base portion accommodation section 26 one-tenth stepped ground are mutually continuous.Interval between bearing contacting part 25 and base portion accommodation section 26 forms and accommodates the base portion accommodation section 26 of base portion 20 and the width d of the groove between the interior ball race 22; This width d is bigger a little than the thickness of slab t of filter plate 11.Therefore, in the time of in base portion 20 enters into the groove that is formed between this base portion accommodation section 26 and the interior ball race 22, can produce some gaps in crank pin 4 sides.

The peripheral part of filter plate 11 constitutes curled portion 27, and is connecting airtight mutually with ring-type concave curved surface 28 on the side outer circumferential side that is formed at crankweb 3.Between curled portion 27 and ring-type concave curved surface 28, make base portion 20 produce resiliently deformables and be pressed on crankweb 3 sides by interior ball race 22, and become the close state of a kind of liquid by ball bearing 12.Thereby prevent the spilling of oil in centrifugal filter 10.

The centrifugal filter 10 that is covered with by transition plate 11 is being communicated with oil circuit 6 and 7.By the high speed rotating of bent axle 1, the N impurities such as metallic pin of sneaking in the oil are separated to foreign side by centrifugal force.The oil of having removed such impurity is transported to the oil circuit 7 from centrifugal filter 10, further is fed into bearing portion 9 from oil circuit 4a.

Below, the effect of present embodiment is described.In Fig. 2, filter plate 11 is embedded into the top of axle journal 2, and covers the side of crankweb 3, then,, be pressed into an end of axle journal 2 towards the ball bearing 12 that is pressed in advance on the axle journal wall 14 that is fixed on crank box; Interior ball race 22 outer being embedded in the wide section portion 24 with ball bearing 12; Then, chimeric upper gasket 30 and gear 31 on axle journal 2, and on the screw section 32 of axle head, link upper cap nut 33.

Thus, interior ball race 22 just directly contacts with bearing contacting part 25, and locatees between packing ring 30 and bearing contacting part 25 and be fixed.Again, during state before internally ball race 22 carries out chimeric installation, the base portion of only giving prominence to size C to the top of wide section portion 24 from bearing contacting part 25 20 is subjected to being equivalent to the resiliently deformable of the amount of size C owing to contacting with the inner side surface of the interior ball race 22 of ball bearing 12, and is pressed in the interior ball race 22 and the groove between the base portion accommodation section 26 that is formed at ball bearing 12.

At this moment, because with respect to the groove width d between ball race 22 in being formed at and the base portion accommodation section 26, the thickness of slab t of base portion 20 is smaller, so base portion 20 is accommodated on the base portion accommodation section 26 in the mode with plurality of gaps; Simultaneously, because the recovery elasticity of self is thickly contacting with ball bearing 12 liquid.At this moment, on the peripheral part of filter plate 11, owing to curled portion 27 is thickly contacting with concave curved surface 28 interior liquid, so filter plate 11 can thickly carry out airtight to centrifugal filter 10 liquid.

Therefore, owing to unlike prior art, be arranged at intervals with base portion 20, but the location of ball race 22 is undertaken by directly contacting with bearing contacting part 25 in making, so can get rid of because the inhomogeneous caused influence of thickness of slab of filter plate 11, the location of ball race 22 is by himself the precision and the machining accuracy of bearing contacting part 25 and determining in making.And, owing to bearing contacting part 25 can be formed by the cutting of high manufacturing accuracy, so the location of ball race 22 in can correctly carrying out prevents the changing of the relative positions of the rotation surface of ball bearing 12, thereby keeps bearing accuracy accurately.

And, because filter plate 11 forms the belleville spring shape, and when making base portion 20 produce resiliently deformable, the inner side surface with interior ball race 22 is fixed, so can be by the recovery elasticity of filter plate 11, make the base portion 20 and the inner side surface liquid of interior ball race 22 thickly produce crimping, and make the curled portion 27 of outer circumferential side and concave curved surface 28 interior liquid thickly produce crimping.Consequently, can thickly carry out airtight to centrifugal filter 10 liquid.

Claims

1. crank lubricating device on this crank lubricating device, is provided with centrifugal filter between crankweb one side of bent axle and the axle journal wall faced mutually therewith, be connected with pressure oil circuit on being formed at bent axle; And, the base portion outside of the filter plate that forms this centrifugal filter and the bearing inner side surface generation of bent axle are connected airtight;

It is characterized in that: the outer circumferential side at the bearing contacting part that is formed at the crankweb side forms the base portion accommodation section, makes the direct contact bearing contacting part of bearing inner side surface, and is connecting airtight the base portion of above-mentioned filter plate at the outer circumferential side of this bearing contacting part; And, under this state, the base portion of above-mentioned filter plate is accommodated above-mentioned base portion accommodation section;

Between the base portion of this filter plate and above-mentioned crankweb, form the gap.

2. crank lubricating device as claimed in claim 1 is characterized in that: above-mentioned filter plate forms the belleville spring shape, and by self recovery elasticity base portion is connected airtight mutually with above-mentioned bearing inner side surface.