JPH064090Y2 - Rolling bearing support sleeve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) A rolling bearing support sleeve according to the present invention includes, for example, an aluminum alloy housing forming a compressor, and an end portion of a rotary shaft of a rotor forming the compressor.
It is used when it is rotatably supported.

(Prior Art) For example, a vane type compressor having various structures is used as a compressor constituting an automobile air conditioner.

In the case of a device having a rotating shaft that rotates inside the housing, such as an air conditioner compressor, it is necessary to rotatably support the end of the rotating shaft with respect to the housing.

Therefore, conventionally, the end portion of the rotary shaft 1 is rotatably supported on the wall surface 3 of the housing 2 by the support portion having the structure shown in FIG.

That is, this support portion is formed in the inner peripheral surface of a cylindrical receiving recess 4 formed on the wall surface 3 of the housing 2 (in addition to the bottomed cylindrical shape as shown in the drawings, it may be a simple cylindrical shape). A cylindrical outer ring 5 having a side track 7 is fitted and fixed, and a plurality of rolling elements 6, 6 are provided between the inner track 7 on the inner peripheral surface of the outer ring 5 and the outer peripheral surface of the end portion of the rotary shaft 1. (Roll) is provided.

By configuring the support portion at the end of the rotary shaft 1 as described above, the rotary shaft 1 becomes rotatable with a light force based on the rolling of the plurality of rolling elements 6, 6, and the rotary shaft 1 is provided. Also, equipment such as compressors can be operated smoothly.

(Problems to be Solved by the Invention) By the way, in the case of the conventional supporting portion configured and functioning as described above, the following inconvenience occurs.

That is, in recent years, in order to reduce the weight of various devices such as compressors, the housings of these devices are often made of aluminum alloys. Thus, even when the housing is made of an aluminum alloy, the rotating shaft 1 that requires high rigidity and wear resistance, the outer ring 5 that constitutes the rolling bearing, the rolling elements 6 and 6, and steel is there.

When the coefficients of thermal expansion of steel and aluminum alloy are compared, the coefficient of thermal expansion of aluminum alloy is considerably larger than that of steel, so that when the temperature of equipment such as the compressor rises, the coefficient of thermal expansion of housing 2 increases. There is a large difference between the amount and the amount of thermal expansion of the outer ring 5.

In this way, when a large difference occurs between the thermal expansion amount of the housing 2 and the thermal expansion amount of the outer ring 5 due to the temperature increase,
A gap is formed between the inner peripheral surface of the receiving recess 4 formed in the housing 2 and the outer peripheral surface of the outer ring 5.

When a gap is formed between the inner peripheral surface of the receiving recess 4 and the outer peripheral surface of the outer ring 5 in this way, the outer ring 5 rattles inside the receiving recess 4 and the rotary shaft 1 is rotated by the rotation thereof. Eccentric movement of the housing 2 by an amount corresponding to the width of the gap.

When the rotary shaft 1 makes such an eccentric motion, noise generated based on a collision sound between the inner peripheral surface of the receiving recess 4 and the outer peripheral surface of the outer ring 5 causes a noise in a device such as a compressor provided with the rotary shaft 1. Not only does the operating noise increase, but a gap is created between the rotary forming the compressor or the like and the circumferential surface of the cylinder chamber, which may cause deterioration of the performance of equipment such as the compressor.

In order to eliminate such inconvenience, Japanese Patent Publication No. 36-2
255 publication, 39-21584 publication, and 40-1 publication.
3082, Japanese Utility Model Publication No. 4-22006, 5
As disclosed in JP-A-7-53873, JP-A-56-131024, JP-A-62-62023, etc.,
A technique is known in which an annular sleeve made of a leaf spring, a synthetic resin, a combination of a leaf spring and rubber, or the like is mounted between the housing and the outer ring of the rolling bearing.

However, in the case of the conventionally known sleeve as described above, the rigidity against the load in the compression direction is not sufficient,
Or, it was not always possible to obtain satisfactory performance, such as poor followability to variations in the gap width due to thermal expansion.

Japanese Utility Model Publication No. 57-61220 discloses a technique for preventing rotation (creep) of an outer ring with respect to a housing by a pin, but it cannot prevent eccentricity of the outer ring with respect to the housing.

The rolling bearing support sleeve of the present invention eliminates any of the inconveniences described above.

(Means for Solving the Problem) The rolling bearing support sleeve of the present invention is formed in a cylindrical shape having a cross-sectional shape bent in the width direction, and has a large radial thickness in the free state. Has the elasticity to
It consists of a metal core material and a spacer part made of synthetic resin laminated in the concave groove portion formed on at least the outer peripheral surface of the core material. A part of the outer peripheral surface constitutes a single outer peripheral surface.

At the same time, the first tongue protruding from the edge of the core member is bent outward to engage with the first locking recess formed on the inner peripheral surface of the housing supporting the rolling bearing. By forming a flexible first bent piece and bending the second tongue piece that also protrudes from the edge of the core material inward, a second bent piece formed on the outer peripheral surface of the outer ring that constitutes the rolling bearing is formed. A second bent piece is formed so that it can be engaged with the locking recess.

(Operation) The rolling bearing support sleeve of the present invention configured as described above is made of a metal core material having elasticity and a spacer portion made of synthetic resin having a large coefficient of thermal expansion. Therefore, even if the size of the gap between the outer peripheral surface of the steel outer ring and the inner peripheral surface of the aluminum alloy housing increases as the temperature rises, this gap is closed and the inner ring of the outer ring is closed. Prevent the supported rotating shaft from rattling.

In particular, in the case of the present invention, the rattling prevention action is achieved by the joint action of the metal core material having a bent cross-sectional shape and the synthetic resin spacer portions laminated on the inner and outer peripheral surfaces of the core material. , The function of supporting the load applied in the direction perpendicular to the rotating shaft is ensured.

Further, a first bent piece formed by bending a first tongue piece protruding from the end edge portion of the core material, and a first locking recess formed on the inner peripheral surface of the housing supporting the rolling bearing. And a second bent piece formed by bending a second tongue piece protruding from the end edge of the core material, and a second locking formed on the outer peripheral surface of the outer ring forming the rolling bearing. The engagement with the recess reliably prevents the sleeve and the outer ring from rotating relative to the housing.

(Embodiment) Next, the present invention will be described in more detail with reference to the illustrated embodiment.

1 to 5 show a first embodiment of the present invention. FIG. 1 is a half sectional view showing a sleeve for supporting a rolling bearing, and FIG. 2 is a sectional view of a rolling bearing with a sleeve in which this sleeve is assembled. FIG. 3 is a partial cross-sectional view of a rotary shaft support device constituted by this rolling bearing with sleeve, and FIG. 4 is a partial cross-sectional view showing a deformed state of the sleeve at the time of temperature rise.
The drawing is a view as seen from an arrow A in FIG. 1, showing a bent piece formed on the edge portion of the core material.

The rolling bearing supporting sleeve 16 of the present invention comprises a core material 8 made of a metal spring plate and a spacer portion 9 made of synthetic resin in which the core material 8 is insert-molded.

The core member 8 has a cross-sectional shape that is bent in the width direction (left-right direction in FIGS. 1 to 3) and has a plurality of through holes 10 and 10 in the circumferential direction. It is made into a shape and has elasticity in the direction of increasing the radial thickness in the free state.

That is, the core material 8 made of a spring steel plate or the like has an overall drawn shape such as a retainer, and has an inner peripheral side flat portion 11 present at the center in the width direction and both end portions in the width direction. The outer peripheral flat portions 12 and 12 are connected to each other by the inclined portions 13 and 13, and the through holes 10 and 10 formed in a rectangular shape like the pockets of the cage are the inner peripheral flat portions. From 11 to the inclined portions 13 and 13, they are provided in parallel to each other and at equal intervals.

Further, one end edge portion of the core material 8 (left end edge portion in FIGS. 1 to 4)
The first and second tongue pieces are formed in the state of projecting from the end edge portion of the core material 8, and the first tongue piece therein is bent outward at a right angle. The first bent piece 25 is formed, and the second tongue piece is bent inward at a right angle to form the second bent piece 26. As shown in FIG. 5, each of the bent pieces 25 and 26 is adapted to project outward or inward from the outer peripheral surface or the outer peripheral surface of the rolling bearing supporting sleeve 16, respectively. .

On the inner peripheral surface and the outer peripheral surface of the core material 8 made of a metal spring plate having the above-mentioned shape, spacer parts 9 made of synthetic resin are injection-molded with the core material 8 inserted in the mold. Although being laminated, the outer peripheral portion 9a and the inner peripheral portions 9b, 9b of the spacer portion 9 are integrally coupled via the through holes 10, 10.

The expansion coefficient α of the synthetic resin forming the spacer portion 9
_9, and the expansion coefficient alpha ₂ of the aluminum alloy used in the housing 2 (Figure 24), the expansion coefficient alpha ₈ of the spring plate material constituting the core member _8, and further expansion of the bearing steel constituting the outer ring 5 of the rolling bearing The coefficient is larger than α ₅ (α ₉ > α ₂
> Α ₈ ≧ α ₅ ), when the core material 8 is insert-molded with the synthetic resin, the thickness dimension of the core material 8 (the dimension in the vertical direction in FIGS. 1 to 4) is elastically slightly reduced, The inner peripheral side flat portion 11 and the outer peripheral side flat portion 12 of the core material 8 are parallel to each other.

As a result of molding the spacer portion 9 made of synthetic resin in a state where the core material 8 is elastically compressed as described above, the inner peripheral surface of the inner peripheral side flat portion 11 of the core material 8 and the spacer portion 9 at room temperature The inner peripheral surfaces 9b and 9b form a single inner peripheral surface 14, and the outer peripheral surfaces of the outer peripheral side flat portions 12 and 12 of the core material 8 and the spacer portion 9
The outer peripheral surface of the outer peripheral portion 9a constitutes a single outer peripheral surface 15.

As shown in FIG. 2, the rolling bearing supporting sleeve 16 of the present invention configured as described above is externally fitted and fixed to the outer ring 18 constituting the rolling bearing 17, and the rolling bearing with sleeve 1
Make up 9. An inner raceway 20 is formed on the inner peripheral surface of the outer ring 18, and a plurality of rolling elements 22, 22 (rollers) arranged inside the outer ring 18 and held by a cage 21 are formed on the inner side. The rolling bearing 17 is formed by rolling contact with the raceway 20. A second locking recess 27 is formed on the outer peripheral surface of the end portion of the outer ring 18 constituting the rolling bearing 17, and the rolling bearing supporting sleeve 16 is mounted on the rolling bearing 1.
In a state where the second bending piece 2 is fitted and fixed to the outer ring 18 constituting the second locking recess 27, the second bending piece 2 is placed in the second locking recess 27.
6, the sleeve 16 and the outer ring 18 are prevented from relatively rotating (the inner peripheral surface of the sleeve 16 and the outer peripheral surface of the outer ring 18 do not slide).

Furthermore, the rolling bearing with sleeve 19 configured as described above
As shown in FIG. 3, is fitted in and fixed to, for example, a bottomed cylindrical receiving recess 4 formed in a housing 2 made of a material having a larger coefficient of thermal expansion than steel such as aluminum alloy, By inserting the end portion of the rotary shaft 1 inside the rolling element 22 that constitutes the rolling bearing 17, a support device for the rotary shaft 1 is constructed. In the assembled state, the sleeve 16 has a thickness direction (vertical direction in the drawing) between the outer peripheral surface of the outer ring 18 forming the rolling bearing 17 and the inner peripheral surface of the receiving recess 4 of the housing 2. ), The state is strongly pressed.

On the inner peripheral surface of the opening end of the receiving recess 4, the first locking recess 2 is formed.
8 is formed, and in a state where the rolling bearing supporting sleeve 16 is internally fitted and fixed in the receiving recessed portion 4, the first bent piece 25 is engaged with the first locking recessed portion 28, The sleeve 16 does not rotate in the receiving recess 4 (the outer peripheral surface of the sleeve 16 and the inner peripheral surface of the receiving recess 4 do not slide).

The rolling bearing supporting sleeve 16 of the present invention configured as described above is formed by the core material 8 made of a metal spring plate having elasticity, and the spacer portion 9 made of synthetic resin having a large coefficient of thermal expansion. Therefore, in the case where the size of the gap between the outer peripheral surface of the steel outer ring 18 and the inner peripheral surface of the receiving recess 4 formed in the aluminum alloy housing 2 increases as the temperature rises. Also, by increasing the thickness of the sleeve 16, the gap is closed and the rotary shaft 1 supported inside the outer ring 18 is prevented from rattling.

That is, since the spacer portion 9 forming the rolling bearing supporting sleeve 16 is made of a synthetic resin having a larger coefficient of thermal expansion than the aluminum alloy forming the housing 2, when the temperature of the rotary shaft supporting device rises. Also in this case, no gap is formed between the outer peripheral surface of the sleeve 16 and the inner peripheral surface of the receiving recess 4. When the temperature of the rolling bearing supporting sleeve 16 of the present invention rises, the spacer portion 9 made of synthetic resin and the core material 8 made of a metal spring plate are heated by the thermal expansion of the spacer portion 9 as shown in FIG. The spacer 9 and the core 8 are deformed as shown in an exaggerated manner so that the outer ring 18
The outer ring 18 and the inner peripheral surface of the receiving recess 4 are stretched, so that the outer ring 18 is supported reliably.

When the temperature rise of the support portion is small and the thermal expansion amount of the synthetic resin spacer portion 9 is still small, the outer ring 18 is firmly supported inside the receiving recess 4 by the elasticity of the core material 8.

Further, with respect to the load applied in the direction perpendicular to the rotary shaft 1, both the spacer portion 9 made of synthetic resin and the core material 8 made of metal spring plate receive the load, so that the sleeve 16 has a sufficiently large load load. The rotating shaft 1 does not rattle or the sleeve 16 sags due to the load applied in the direction perpendicular to the rotating shaft 1.

Further, a first bent piece 25 formed by bending a first tongue piece protruding from the end edge of the core material 8 is provided on the inner peripheral surface of the receiving recess 4 formed in the housing 2 supporting the rolling bearing 17. By engaging the formed first locking recess 28, the sleeve 16 is prevented from rotating in the receiving recess 4 of the housing 2, and the second tongue piece that also projects from the end edge of the core 8 is provided. The second bending piece 26 formed by bending the sleeve 16 is engaged with the second locking concave portion 27 formed on the outer peripheral surface of the outer ring 18 forming the rolling bearing 17 to form the sleeve 16
Since the outer ring 18 is prevented from rotating inside, the tightening margin when pushing the rolling bearing supporting sleeve 16 into the gap between the outer peripheral surface of the outer ring 18 and the inner peripheral surface of the receiving recess 4 is not so large. Even without it (even if the sleeve 16 can be pushed into the gap with a light force), it is possible to reliably prevent the outer ring 18 from rotating in the receiving recess 4.

The first and second bent pieces 25 and 26 formed on the edge portion of the core material 8 made of a metal spring plate that constitutes the rolling bearing supporting sleeve 16 of the present invention are not necessarily the same edge edge of the core material 8. It is not necessary to form the first bending piece 25 and the second bending piece 2 as shown in FIGS. 6 to 8 showing the second embodiment.
6 and 6 may be formed on the opposite edge of the core material 8.

Further, the shape and the number of the bending pieces 25 and 26 are not limited to the shape of forming the narrow bending pieces 25 and 26 one by one as in the first to second embodiments described above. 9 ~
As in the third embodiment shown in FIG. 11, a plurality of first bending pieces 25, 25 having a wide width can be fixedly formed at equal intervals.

Furthermore, the cross-sectional shape of the core material 8 is not limited to the above-mentioned shape, and other cross-sectional shapes such as those shown in FIGS. 12 to 23 can be adopted.

Of these, the cross-sectional shape of the fourth embodiment shown in FIGS. 12 to 14 is obtained by converting the inner and outer circumferences of the cross-sectional shape of the second embodiment shown in FIGS. .

In the case of the fifth embodiment shown in FIGS.
The inner and outer peripheries of the cross-sectional shape of the first embodiment shown in FIG. 5 are converted to opposite directions, and the other end edge of the core material 8 is bent inward over the entire circumference to form an inward flange portion 29. The inward flange portion 29 allows the sleeve 16 and the outer ring 18 to be positioned in the width direction (left-right direction in FIG. 15). In the case of the present embodiment, one edge of the core material 8 (15th edge
The second bent piece 26 provided at the left end edge of the drawing is the core member 8
After being fitted onto the outer ring 18 of the rolling bearing 17, it is formed by bending.

Further, the sectional shape of the sixth embodiment shown in FIG. 18 is such that the inner peripheral side flat portions 11 and 2 are two locations, the outer peripheral side flat portions 12 and 12 are three locations, and the both flat portions 11 and 12 are inclined. Parts 13, 1
In the seventh embodiment shown in FIG. 19, three parts are provided at four places, and the inner and outer circumferences of the sectional shape of the sixth embodiment are converted.

Further, the sectional shape of the eighth embodiment shown in FIG. 20 is formed in the central portion, and flat portions 24 and 24 are respectively formed at both ends of the arc portion 23 partially exposed on the inner peripheral surface of the sleeve 16. The formed one, the ninth embodiment shown in FIG. 21, is the one in which the inner and outer circumferences of the cross-sectional shape of the eighth embodiment are changed.

Further, in the case of the tenth embodiment shown in FIG. 22, the arc portion 2
No. 3, 23 is provided at two places, and flat portions 24, 24 are provided at three places, respectively, and the eleventh embodiment shown in FIG.
The cross-sectional shape of the tenth embodiment is obtained by converting the inner and outer circumferences.

However, in any of the embodiments, the core material 8 is exposed on both the inner peripheral surface and the outer peripheral surface of the sleeve 16, and the sleeve 16 is covered with the outer peripheral surface of the outer ring 18 and the inner peripheral surface of the receiving recess 4. When it is pushed in between, the not only the spacer portion 9 made of synthetic resin but also the core material 8 made of a metal spring plate comes into contact with both the outer peripheral surface of the outer ring 18 and the inner peripheral surface of the receiving recess 4. To do.

In the case where the rolling bearing with sleeve 19 or the rolling bearing with sleeve 19 is assembled,
During injection molding of the spacer portion 9, the outer ring 1 of the rolling bearing 17
8 and the sleeve 16 (further, the receiving recess 4) can be integrally connected.

Further, the spacer portion 9 only needs to have at least the outer peripheral portion 9a, and the inner peripheral portion 9b can be omitted.

(Effect of the Invention) Since the rolling bearing supporting sleeve of the present invention is configured and operates as described above, the rolling bearing supporting member made of steel or the like and the housing made of aluminum alloy or the like are used. The rolling bearing rattles in the housing even when the gap existing between the outer peripheral surface of the rolling bearing and the inner peripheral surface of the housing becomes large due to the difference in the amount of thermal expansion with the member constituting Things can be reliably prevented.

As a result, not only can the operating noise of a device such as a compressor having a housing made of aluminum alloy be reduced, but it is also possible to prevent the performance of such a device from deteriorating due to a rise in temperature.

Also, by the first and second bending pieces formed on the core material,
Since the housing and the outer ring are reliably prevented from rotating relative to the sleeve, the sleeve can be attached to the housing and outer ring without increasing the tightening allowance of the sleeve (almost no tightening allowance). You can prevent it from rotating against
Be sure to prevent the occurrence of creep in the sleeve mounting part,
The durability of the sleeve can be secured.

[Brief description of drawings]

1 to 5 show a first embodiment of the present invention. FIG. 1 is a half sectional view showing a sleeve for supporting a rolling bearing, and FIG. 2 is a sectional view of a rolling bearing with a sleeve in which this sleeve is assembled. FIG. 3 is a partial cross-sectional view of a rotary shaft support device constituted by this rolling bearing with sleeve, and FIG. 4 is a partial cross-sectional view showing a deformed state of the sleeve at the time of temperature rise.
The drawing shows a bent piece formed on the edge portion of the core material. FIG. 1 is a view taken in the direction of arrow A, FIGS. 6 to 8 show a second embodiment of the present invention, and FIG. Half section view of the sleeve, No. 7
6 is a view seen from the left side of FIG. 6, FIG. 8 is a view seen from the right side of the same, and FIGS. 9 to 11 are the third embodiment of the present invention.
-14 is the same as the fourth embodiment, and FIGS. 15-17 is the same as the fifth embodiment.
18 to 23 are sectional views similar to FIG. 1, respectively, showing sixth to eleventh embodiments of the bearing supporting sleeve of the present invention,
FIG. 24 is a sectional view showing an example of a conventional rotary shaft support portion. 1: rotary shaft, 2: housing, 3: wall surface, 4: receiving recess,
5: outer ring, 6: rolling element, 7: inner raceway, 8: core material, 9:
Spacer portion, 9a: outer peripheral portion, 9b: inner peripheral portion, 10: through hole, 11: inner peripheral flat portion, 12: outer peripheral flat portion, 13:
Inclined portion, 14: inner peripheral surface, 15: outer peripheral surface, 16: rolling bearing supporting sleeve, 17: rolling bearing, 18: outer ring, 1
9: rolling bearing with sleeve, 20: inner race, 21: cage, 22: rolling element, 23: arc portion, 24: flat portion, 2
5: first bent piece, 26: second bent piece, 2
7: second locking recess, 28: first locking recess, 29: inward flange.

Claims (3)

[Scope of utility model registration request] 1. A metal core material, which is formed in a cylindrical shape having a cross-sectional shape bent in the width direction and has elasticity to increase the thickness in the radial direction in a free state, and the core. And a spacer part made of synthetic resin laminated on the concave groove part formed on at least the outer peripheral surface of the core material. A first locking recess formed on the inner peripheral surface of the housing supporting the rolling bearing by forming an outer peripheral surface and bending outwardly the first tongue piece protruding from the end edge portion of the core material. Formed on the outer peripheral surface of the outer ring that constitutes the rolling bearing by forming a first bent piece that can be engaged with and bending the second tongue piece that also protrudes from the edge of the core inward Rolling shaft having a second bent piece engageable with the second locking recess Support for the sleeve. 2. The rolling bearing supporting sleeve according to claim 1, wherein the spacer portion made of synthetic resin is formed on the outer peripheral surface and the inner peripheral surface of the metal core material. 3. A metal core material has a plurality of through holes in the circumferential direction, and spacer portions laminated on the inner peripheral surface and the outer peripheral surface of the core material through the through holes. The rolling bearing support sleeve according to claim 2, wherein the two are coupled to each other.