JPH02203014A - Bearing with builtup flange - Google Patents

Abstract

PURPOSE:To enable thrust load capacity to be exhibited by forming a pair of cutout part sand a groove on each side surface of a liner and projected parts on each flange to be fitted thereto so as to have a degree of freedom in the axial and circumferential directions, so that buildup and removal can be facilitated for providing interchangeability of parts. CONSTITUTION:The assembly of a liner and a flange is carried out in such a way that after the central projection 9 of the flange 2 has been inserted into the groove 4 of the liner 1 from the outside diameter side of the liner 1, a pair of projections 8 on both ends of the flange 2 are hung on the fitting surfaces 5 of a pair of cutout parts 3 of the liner 1. Thereby, even in a builtup type, a stable shape near to a flange-fitted bearing consisting of a single member can be kept, and excellent assembling workability to the housing can be obtained, and also removal can be facilitated. And the dimensions of the liner 1 are made slightly less than the width of the housing, so that the flange 2 can be built up so as to be movable toward the inside to the liner 1, and after it has been built up in the housing, the degree of freedom of the flange can be maintained, and a proper fitting of the thrust surfaces can be secured, enabling thrust load capacity to be a sufficiently developed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention consists of a half-cylindrical liner and a half-cylindrical flange attached to the end thereof, and is capable of receiving both radial and axial loads. A prefabricated flanged bearing with improved compatibility, particularly used when machining, assembly, and flange removal are easy and maximum load capacity is required as a thrust bearing. Regarding.

[Prior Art 1 Conventionally, this type of prefabricated flanged bearings can be classified into three types. In the first type, a liner with a large number of grooves on the end face and a flange with a corresponding number of protrusions are manufactured separately, and the grooves and protrusions of both are engaged and caulked. The second type is a fixed caulking method that firmly connects the liner, and the second type is the first type in which the flange is provided with a certain degree of freedom between the groove and the protrusion so that it can move freely in the circumferential and axial directions relative to the liner. The third type is a loose caulking method in which the liner and flange are engaged with each other and then no forming process such as caulking is performed. This third engagement method includes one that allows the flange to be freely attached and detached after the housing is assembled in a free state as disclosed in Japanese Utility Model Publication No. 60-3392, and one that allows the flange to be freely attached and detached after the housing is assembled, as disclosed in Japanese Utility Model Publication No. 59-147115. As disclosed, when a flange is attached to a liner, there are some that cannot be easily removed due to a retaining mechanism.

[Problem to be solved by the invention] In the fixed caulking method, when a thrust load is applied, the rigidity differs between the inner and outer circumferential sides of the flange due to the influence of the liner, making it impossible to ensure uniform thrust surface contact. However, it has the drawback that the thrust load capacity cannot be fully utilized, and both the fixed crimping method and the loose crimping method require crimping work, making processing cumbersome, and it is difficult to remove the liner and flange, making them incompatible. It has the following drawback.

Although the above-mentioned interlocking method does not have the above-mentioned drawbacks, the one described in Japanese Utility Model Publication No. 60-3392 does not have a caulking part, so the flange may accidentally come off the liner after assembly to the housing and when the shaft is assembled. It has disadvantages in terms of ease of assembly, such as problems occurring in the
In the case of the product described in Publication No. 147115, it is not easy to attach and detach the flange, so it is not possible to replace only the defective part during repairs, etc., and it is necessary to replace the liner and flange assembly as is, resulting in poor serviceability. It has the disadvantage of lacking in

[Means for Solving the Problems] In order to solve the drawbacks of the above-mentioned prior art, the present invention has the following features:
A prefabricated flanged bearing comprising a half-cylindrical liner with a uniform back metal back surface and a half-cylindrical flange detachably attached to at least one axial end of the liner, the liner A pair of notches extending in the circumferential direction adjacent to the mating surface of the liner and a groove extending in the circumferential direction located approximately at the center of the liner in the circumferential direction are formed at at least one end in the axial direction. each of the notches is formed with a fitting surface that makes an angle of less than 90° with respect to the mating surface of the liner, and the groove has a side wall that is at least partially inclined with respect to a linear generatrix of the liner. , the flange has a pair of protrusions adjacent to the mating surface of the flange along the radially inner edge, and a protrusion formed approximately at the center in the circumferential direction, each of the pair of protrusions is formed with a fitting surface that forms an angle smaller than 90° with respect to the mating surface of the flange and engages with a fitting surface of the notch of the liner, and the pair of protruding portions and the protruding portion of the central portion of the flange each have: When the flange is assembled to the liner, the flange is fitted into the pair of notches and grooves of the liner such that it can move slightly in the axial direction and circumferential direction with respect to the liner. The present invention provides a prefabricated flanged bearing.

[Function] According to the present invention, the pair of notches and grooves in the liner and the protrusion of the flange fitted into these are formed so that the flange can move with a certain degree of freedom in the axial and circumferential directions with respect to the liner. Therefore, in the free state before being attached to the housing, the flange can be easily attached to and removed from the liner, and furthermore, after being assembled to the housing, the flange does not interfere with the groove in the approximate center of the liner and the housing. Since the liner cannot be tilted beyond a certain level, it will not accidentally come off the liner.

Furthermore, in one embodiment of the present invention, the strength of the protrusion is increased by sufficiently widening the circumferential width of the groove of the liner and the circumferential width of the protrusion of the flange that is fitted into the groove. The flange can also have a rotation prevention function, and it is possible to omit the setting of a special rotation prevention mechanism such as a hook type or a hook pin type commonly used in thrust washers.

Furthermore, in another embodiment of the present invention, the groove of the liner and the protrusion of the flange fitted into the groove are shifted from the center in the circumferential direction and are made asymmetrical, so that when the flange is assembled to the liner, the position of the flange is asymmetrical. This prevents incorrect assembly where the parts are installed upside down. Misassembly of the flange to the liner can be avoided by forming a pair of notches in the liner and a pair of protrusions on the flange that engage with them asymmetrically, or by providing protrusions or notches on the outer peripheral surface of the flange. It can also be prevented by

[Example] Fig. 1 is an assembled perspective view of an embodiment of the prefabricated flanged bearing of the present invention, Fig. 2 is a perspective view showing the bearing shown in Fig. 1 with flanges on both sides separated, and Fig. 3 1 is a front view taken in the direction of arrow A in FIG. 1, and FIG. 4 is a partial plan view taken in the direction of arrow B in FIG. In Figures 1 and 2, 1
2 is a half-cylindrical liner made of a bearing alloy having a uniform backing metal layer, and 2 is a half-cylindrical flange attached to both ends of the liner 1 in the axial direction. The liner 1 has a pair of notches 3 cut out along the circumferential direction from the mating surface 6 at both ends thereof, and a groove 4 at a substantially central portion in the circumferential direction between the notches 3. The end wall of the notch 3 on the far side from the mating surface 6 is a fitting surface 5, and this fitting surface 5 is either parallel to the mating surface 6 or forming an angle α smaller than a right angle with the mating surface as shown in FIG. . As clearly shown in FIG. 4, the inner side walls of the groove 4 are parallel to the linear generatrix of the liner 1, and the outer portions near the opening of the groove are inclined surfaces 7 at an angle p with respect to the linear generatrix.

The flange 2 is formed with a pair of protrusions 8 at positions corresponding to the pair of notches 3 of the liner 1, and a central protrusion 9 at positions corresponding to the grooves 4. The flange is dimensioned to provide some degree of freedom of movement in the axial and circumferential directions relative to the liner when fitted into the groove 4. Note that the protrusion 8 has a notch 3.
The fitting surface is formed so as to engage with the fitting surface 5 of the two, and after the fitting is engaged, no forming process such as caulking is performed all at once.

The liner and flange are assembled as follows. A protrusion 9 at the center of the flange 2 from the outer diameter side of the liner 1
After inserting the liner into the groove 4 of the liner 1, the pair of protrusions 8 at the open end of the flange 2 are hung on the fitting surfaces 5 of the pair of notches 3 of the liner 1. By doing this, the central protrusion 9 of the flange 2 inserted into the groove 4 of the liner 1 cannot move beyond the intended movement in the axial direction due to the inclined side wall 7 of the groove 4, and the liner 1 mating surface 6
Since the outer diameter of the flange tends to become larger than the housing diameter, the flange will not easily come off from the liner unless an external force is applied to push the area around the mating surface outward in the axial direction. Although it is an assembled type, it can maintain a stable shape similar to that of a flanged bearing made of a single member, making it easy to handle.
Moreover, it is easy to assemble into the housing. When it is necessary to remove the flange from the liner, it can be easily removed by applying an appropriate external force from the inside to the outside near the mating surface of the flange 2.

Furthermore, after the bearing of the present invention is assembled into the housing, as can be seen from FIG. It will never come off. That is, in order for the flange 2 to come off the liner 1, the flange 2 must be tilted so much that the protrusion 8 comes off the notch 3, as shown on the right side of FIG. It doesn't tilt that much.

Therefore, according to the present invention, there is no need to provide special measures to prevent the flange from falling or rotating. If the dimensions of the liner 1 are made slightly smaller than the width of the housing during assembly so that the flange 2 can move inward relative to the liner 1, the degree of freedom of the flange can be maintained after assembly to the housing, and the thrust Since a good surface rumble can be ensured, it is possible to fully demonstrate the thrust load capacity.

Fig. 7a shows an embodiment in which the groove 4 and the central protrusion 9 are formed at off-center positions, Fig. 7b shows an embodiment in which the lengths of the notches 3 are different on the left and right sides, and Fig. 7c shows the outer periphery of the flange. This is an embodiment in which the anti-rotation protrusion 10 is formed on the surface at a position off center, and these embodiments can prevent incorrect assembly in which the flange is attached upside down. In the embodiment shown in FIG. 7c, the same effect can be achieved even if a rotation-stopping notch is provided on the outer circumferential surface of the flange instead of the protrusion.

Instead of forming a part of the side wall of the groove 4 on the opening side as an inclined surface 7 as shown in FIG. 4, the entire side wall is formed as an inclined surface 7' as shown in FIG. 8a.
You can also use it as Also, as shown in Fig. 8b, first a side wall is formed whose entire surface is substantially parallel to the linear generatrix of the liner, and then the opening side edge of the side wall is caulked to form a part of the side wall into an inclined surface 7'' as shown in Fig. 8c. You can do it like this.

[Effects of the Invention] With the above configuration, the present invention can exhibit the following effects.

(1) The liner and flange can be easily assembled and removed, and since the individual parts are interchangeable, only defective parts can be replaced during repair.

(2) Once assembled into the housing, the flange will not come off from the liner (easy handling and assembly).

(3) Since the flange is assembled to the liner with enough room to move freely, there is no interference with the liner, and the thrust load capacity can be demonstrated on a par with that of the thrust washer type.

(4) After the flange is assembled to the liner, no cutting or molding is required, resulting in high productivity.

(5) The flange can also have a rotation prevention function, and processing such as a counterbore and a rotation prevention part on the housing side can be omitted.

(6) Since the shape of the protruding portion of the flange can be made asymmetrical, it is possible to prevent the flange from being attached upside down when assembling the bearing.

(7) Since the bearing is a prefabricated flanged bearing, it is possible to select the optimum material and wall thickness for the thrust bearing portion and the journal bearing portion that match the respective usage conditions.

(8) Unlike integral flange bearings made of a single member,
Optimum design is possible without being restricted by the thrust outer diameter.

(9) Since the bearing has an assembly type flange, there is no possibility of incorrect assembly between the front and back and the top and bottom, which tends to occur with split type thrust washers.

[Brief explanation of the drawing]

FIG. 1 is an assembled perspective view of an embodiment of the prefabricated flanged bearing of the present invention, FIG. 2 is a perspective view of the bearing shown in FIG. 1 with both flanges separated from the liner, and FIG. The front view of the bearing shown in Figure 1 is seen in the direction of arrow A, and Figure 4 is the front view of the bearing shown in Figure 1.
FIG. 5 is a partial plan view of a part of the bearing shown in the figure as seen in the direction of arrow B, FIG. 1 is a side cross-sectional view showing a state in which the bearing of the present invention is assembled into a housing, with the left half showing the normal assembled state and the right half showing the state when the flange is removed from the liner. Fig. 7a is a front view of an embodiment in which the position of the central protrusion 8 is offset from the center, Fig. 7b is a front view of an embodiment in which the length of the notch is different on the left and right sides, and Fig. 7c is from the center of the outer peripheral surface of the flange. FIG. 8a is a partial plan view of an embodiment in which the side walls of the liner groove are entirely sloped surfaces, and FIGS. 8b and 8c are the side walls of the liner groove. Fig. 8b shows the state before crimping, and Fig. 8c shows the state after crimping. DESCRIPTION OF SYMBOLS 1... Half cylindrical liner, 2... Half cylindrical flange, 3... Notch, 4... Groove, 5... Fitting surface, 6... Liner mating surface, 7 ...Groove inclined side wall, 8...Protrusion near the flange mating surface, 9...Protrusion near the center of the flange, 10...Protrusion on the outer peripheral surface of the flange.

Claims (5)

[Claims] (1) A half-split cylindrical liner with a uniform back metal back,
a half cylindrical flange removably attached to at least one axial end of the liner; a pair of notches extending in the circumferential direction adjacent to the liner, and a groove extending in the circumferential direction located approximately in the center of the liner in the circumferential direction,
Each of the notches is formed with a fitting surface that makes an angle of less than 90° with respect to the mating surface of the liner, and the groove has a side wall that is at least partially inclined with respect to a linear generatrix of the liner, The flange has a pair of protrusions adjacent to the mating surface of the flange along the radially inner edge and a protrusion formed approximately at the center in the circumferential direction, and each of the pair of protrusions has a is formed with a fitting surface that forms an angle smaller than 90° with respect to the mating surface of the flange and engages with a fitting surface of the notch of the liner, and the pair of protruding portions and the protruding portion of the central portion of the flange each have:
When the flange is assembled to the liner, the flange is fitted into the pair of notches and grooves of the liner such that it can move slightly in the axial direction and circumferential direction with respect to the liner. A bearing with an assembly type flange. (2) The assembly according to claim 1, wherein the width in the circumferential direction of the groove of the liner and the width in the circumferential direction of the protrusion of the flange fitted into the groove are made sufficiently wide. Type flange bearing. (3) The assembly according to claims 1 and 2, wherein the groove of the liner and the protrusion of the flange fitted into the groove are shifted from the center in the circumferential direction and are asymmetrical. Type flange bearing. (4) The lengths of the pair of notches of the liner in the circumferential direction from the mating surface of the liner are made unequal, and the mating surface of the flange of the mating surface of the pair of protrusions of the flange is adjusted accordingly. The prefabricated flanged bearing according to claims 1 and 2, characterized in that the distances in the circumferential direction from the flange are unequal. (5) The prefabricated flanged bearing according to any one of claims 1 to 4, wherein a protrusion or a notch is provided on the outer peripheral surface of the flange.