JP7609736B2 - Sliding bearing device - Google Patents

Description

This invention relates to a sliding bearing device in a support structure that is arranged, for example, between the upper structure and lower structure of a structure as a seismic isolation mechanism and supports the upper structure.

As shown in Patent Document 1, for example, sliding bearing devices have been used to provide movable support in structures where vibration or relative displacement occurs, such as seismic isolation structures, bridges, or connections between fixed structures. Such sliding bearing devices are disposed between a supported structure such as a main girder and a supporting structure such as a bridge pier, and can support the structure so that it can be displaced in the in-plane direction at the boundary surface by sliding at the boundary surface between the upper shoe fixed to the supported structure and the lower shoe fixed to the supporting structure.

Specifically, in the sliding bearing device described in Patent Document 1, in which the sliding surface of the lower shoe fixed to the upper surface of the supporting structure slides against the sliding surface fixed to the bottom surface of the supported structure, the sliding surface of the lower shoe is made of a stainless steel sliding plate material, and the sliding surface of the upper shoe is made of a synthetic resin sliding material.

JP 2000-170829 A

In the sliding bearing device constructed as described above, the sliding member made of synthetic resin slides on the sliding plate material made of stainless steel, and is heated by frictional heat generated by the sliding of the sliding member against the sliding plate material.
In this way, when the sliding material and the sliding plate material are heated by frictional heat, the friction coefficient of the sliding material changes, and the sliding properties change. As a result, there is a problem that the desired sliding properties of the sliding bearing device cannot be secured.

The present invention aims to provide a sliding bearing device that can suppress changes in sliding properties caused by frictional heat that accompanies the sliding of a sliding material against a sliding plate material.

This invention is characterized in that the sliding bearing device is composed of a first shoe and a second shoe arranged on the opposing portions of a first structure and a second structure, and the sliding surfaces of the first shoe and the second shoe slide against each other at the opposing portions of the first shoe, the first shoe is provided with a synthetic resin sliding material that constitutes the sliding surface and a holding member that holds the sliding material, the second shoe is provided with a sliding material that constitutes the sliding surface and against which the sliding material slides, and the first shoe is provided with a heat dissipating member that has an abutment portion that abuts against at least one of the holding member and the sliding material, and a heat dissipating portion that extends outward from the abutment portion.

The first and second structures may be, for example, a bridge with a pier as the first structure and a main girder as the second structure, a passageway with a building as the first structure and a walkway connecting buildings as the second structure, a roof structure with a column as the first structure and a truss roof as the second structure, or structures in an expansion structure with a building as the first structure and another building as the second structure. Alternatively, the first structure may be a rack on which a server is placed and the second structure may be a floor slab on which the rack is installed.
The first and second shoes may be constituted by a lower shoe and an upper shoe when the first structure and the second structure are disposed in a vertical direction.

According to the present invention, it is possible to suppress the change in slidability caused by frictional heat that accompanies the sliding of the sliding member against the sliding object.
In detail, when the first shoe, which is equipped with a sliding material made of synthetic resin and a retaining member that holds the sliding material, moves relative to the second shoe, which is equipped with a slidable material against which the sliding material slides, the sliding material provided on the first shoe slides against the slidable material provided on the second shoe, and is heated by frictional heat associated with the sliding.

However, since the first shoe is provided with a heat dissipation member having a contact portion that contacts at least one of the retaining member and the sliding material, and a heat dissipation portion that extends outward from the contact portion, the heat generated by friction is conducted to the heat dissipation member via the contact portion.
The heat dissipation member, to which heat is conducted via the contact portion, can dissipate heat by the heat dissipation portion extending outward from the contact portion.

As described above, the heat generated by the sliding material sliding against the sliding target material can be dissipated to the outside by the heat dissipation member, so changes in sliding properties caused by the frictional heat that accompanies the sliding of the sliding material against the sliding target material can be suppressed.

As an aspect of this invention, the holding member may include a holder that holds the sliding material, and a fixed holding member that is fixed to the first structure and has a accommodating portion that accommodates a portion of the holder so that the portion can move in the support direction, and the abutment portion of the heat dissipation member may abut against at least one of the holder and the sliding material.
The support direction is a direction in which one of the first structure and the second structure supports the other via the sliding bearing device, and is generally vertical.

According to this invention, heat can be efficiently dissipated from the heat dissipation member.
In detail, since the contact portion directly contacts at least one of the sliding material and the holder that holds the sliding material, the frictional heat generated by the sliding of the sliding material against the slidable material can be efficiently conducted to the heat dissipation member and dissipated.

As a further aspect of the present invention, the abutment portion may abut against an outer circumferential surface of the holder, and the heat dissipation portion may extend in a radial direction relative to the holder.
According to this invention, heat can be efficiently conducted to the heat dissipation member via the contact portion that contacts the outer circumferential surface of the holder, thereby dissipating heat.

In addition, the heat dissipation portion that extends outward from the contact portion extends radially relative to the holder, so it can be made large without interfering with the sliding of the sliding material and the sliding material, which means that a large heat dissipation surface is ensured, and heat can be dissipated from the heat dissipation member more efficiently.

As a further aspect of the present invention, the abutment portion may be formed in a ring shape that abuts against an outer circumferential surface of the holder.
According to this invention, a large contact area between the holder and the contact portion can be ensured, so that heat can be more efficiently conducted to the heat dissipation member and dissipated.

In addition, since the contact portion is ring-shaped and contacts the outer peripheral surface of the holder, by attaching the contact portion to the holder, the heat dissipation member will not accidentally fall off the holder and can be used safely.

As a further aspect of the present invention, the fixed holding member may be provided with a loose-fitting groove into which the heat dissipating portion extends in a radial direction relative to the holder and is loosely fitted so as to be movable in the supporting direction.
According to this invention, the heat dissipation portion extending outward from the abutment portion fits loosely into a loose-fitting groove provided in the fixed holding member, so that the heat dissipation portion can be made large without interfering with the movement of the holder in the support direction relative to the fixed holding member, i.e., a large heat dissipation surface is secured, and heat can be dissipated from the heat dissipation member more efficiently.

In another aspect of the invention, the holder may be provided with a storage recess that stores a portion of the sliding material, the abutment portion may abut against a portion of the sliding material that is stored in the storage recess, and the heat dissipation portion may extend radially through the holder relative to the sliding material.

According to this invention, since the contact portion contacts the sliding member which is directly heated by frictional heat caused by sliding against the sliding member, the heat dissipation member can conduct heat more effectively via the contact portion, and therefore, more heat can be dissipated from the heat dissipation member.
Furthermore, since the contact portion of the sliding material is in contact with the accommodated portion of the holder, which is difficult to dissipate heat from, the heat dissipation member can promote a decrease in the temperature of the sliding material.

Furthermore, since the heat dissipation portion penetrates the holder and extends radially relative to the sliding material, the heat dissipation portion can be made large without interfering with the sliding between the sliding material and the sliding material, i.e., a large heat dissipation surface is ensured, and heat can be dissipated from the heat dissipation member more efficiently.

As a further aspect of the present invention, the abutting portion may be formed in a shape that covers the accommodated portion.
According to this invention, since the abutment portion covers the accommodated portion, a large abutment area between the sliding member and the abutment portion can be ensured, and heat can be more efficiently conducted to the heat dissipation member and dissipated.

In addition, because the abutment portion covers the portion to be accommodated in the accommodation recess, i.e., because the abutment portion is interposed between the accommodation recess and the portion to be accommodated, heat conduction from the sliding material to the holder is suppressed, and heat is conducted to the heat dissipation member via the abutment portion, allowing for efficient heat dissipation.

As another aspect of the present invention, the fixed holding member may be provided with a loose-fitting groove extending radially from the sliding member and into which the heat dissipating portion passing through the holder is loosely fitted so as to be movable in the supporting direction.
According to this invention, the heat dissipation portion, which extends radially relative to the sliding material and penetrates the holder, fits loosely into a loose-fitting groove provided in the fixed holding member, so that the heat dissipation portion can be made large without interfering with the movement of the holder in the support direction relative to the fixed holding member, i.e., a large heat dissipation surface can be secured, and heat can be dissipated from the heat dissipation member more efficiently.

The present invention provides a sliding bearing device that can suppress changes in sliding properties caused by frictional heat that accompanies the sliding of a sliding member against a sliding plate.

FIG. 2 is an explanatory diagram of the sliding bearing device according to the first embodiment. FIG. 2 is an explanatory diagram of the sliding bearing device according to the first embodiment. FIG. 2 is an exploded perspective view of the sliding bearing device according to the first embodiment. FIG. 5 is an explanatory diagram of a sliding bearing device according to a second embodiment. FIG. 5 is an explanatory diagram of a sliding bearing device according to a second embodiment. FIG. 7 is an exploded perspective view of a sliding bearing device according to a second embodiment. FIG. 11 is an explanatory diagram of a sliding bearing device according to a third embodiment. FIG. 11 is an explanatory diagram of a sliding bearing device according to a third embodiment. FIG. 11 is an exploded perspective view of a sliding bearing device according to a third embodiment. FIG. 13 is an explanatory diagram of a sliding bearing device according to a fourth embodiment. FIG. 13 is an explanatory diagram of a sliding bearing device according to a fourth embodiment. FIG. 13 is an exploded perspective view of a sliding bearing device according to a fourth embodiment. FIG. 13 is an exploded perspective view of a sliding bearing device according to a fourth embodiment.

An embodiment of the present invention will now be described with reference to the drawings.
FIG. 1 shows an explanatory diagram of the sliding bearing device 1 of the first embodiment, FIG. 2 shows an explanatory diagram of the sliding bearing device 1 of the first embodiment, and FIG. 3 shows an exploded perspective view of the sliding bearing device 1 of the first embodiment.

In detail, Fig. 1(a) shows a front view of the sliding bearing device 1, and Fig. 1(b) shows a vertical cross-sectional view of the sliding bearing device 1. Fig. 2(a) shows a perspective view of the sliding bearing device 1 from above, and Fig. 2(b) shows a perspective view of the sliding bearing device 1 from below. Note that Fig. 2(b) shows the sole plate 21 in a see-through state. The up-down direction in Figs. 1 to 3 is referred to as the up-down direction H.

The sliding bearing device 1 is a seismic isolation device that is disposed between an upper structure and a lower structure to form a seismic isolation structure. It is composed of an upper shoe 10 fixed to the upper structure and a lower shoe 20 fixed to the lower structure, and the boundary surface between the upper shoe 10 and the lower shoe 20, i.e., the sliding surface (10a, 20a), slides, thereby providing support that allows displacement in the in-plane direction at the boundary surface (sliding surface), and can absorb vibration energy caused by, for example, earthquakes or strong winds, and provide seismic isolation.

In detail, the sliding bearing device 1 is composed of an upper shoe 10 fixed to a bottom surface 101 of an upper structure 100 and a lower shoe 20 fixed to an upper surface 201 of a lower structure 200, as shown in FIG.
More specifically, the lower shoe 20 is composed of a sole plate 21 fixed to the upper surface 201 of the lower structure 200, and a slide plate 22 attached to the sole plate 21. The upper surface of the slide plate 22 constitutes a lower shoe sliding surface 20a that slides against an upper shoe sliding surface 10a of the upper shoe 10 described later. The slide plate 22 is made of a stainless steel plate.

The upper shoe 10 is composed of a steel base pot 11 that is fixed to the bottom surface 101 of the upper structure 100, and a sliding part 30 that is circular in plan view and arranged in a mounting recess 113 in the center of the bottom side of the base pot 11.
The base pot 11 is composed of a pedestal portion 111 which is circular in plan view, and a circular small diameter portion 112 which is disposed on the underside of the pedestal portion 111 and has a smaller diameter than the pedestal portion 111. The bottom side of the small diameter portion 112 is provided with a mounting recess 113 which is a cylindrical space that is open downward.

As shown in FIG. 2, the sliding portion 30 mounted in the mounting recess 113 of the base pot 11 includes an elastic plate 31, an assembled bearing 32, and a heat dissipating member 40 mounted on the assembled bearing 32.
In addition, in the sliding portion 30, a shim or a seal ring may be provided between the elastic plate 31 and the assembled bearing 32. Also, the elastic plate 31 does not have to be provided.

The elastic plate 31 is a rubber plate having a circular shape in a plan view.
As described above, the elastic plate 31 is accommodated in the mounting recess 113 of the base portion 111 together with the upper portion of the bearing holder 33 in the assembled bearing 32 , and is formed in a disk shape having a diameter slightly smaller than that of the mounting recess 113 .

The assembled bearing 32 is housed in the mounting recess 113 and constitutes the upper shoe sliding surface 10a, and is constructed by assembling the bearing holder 33 and slide bearing 34 described below.

The bearing holder 33 is made of stainless steel, has a generally cylindrical shape, and is formed to have the same diameter as the elastic plate 31 .
As described above, the bearing holder 33 is mounted in the mounting recess 113 of the base pot 11 together with the elastic plate 31 , but is formed to be higher than the depth of the mounting recess 113 .

The bearing holder 33 also has a mounting recess 331 on the bottom side for mounting and holding the slide bearing 34 .
The mounting recess 331 is a cylindrical space that is shallower than the thickness of the slide bearing 34 and is open downward.

The slide bearing 34 is a self-lubricating plate made of PTFE with a low coefficient of friction and a circular shape in plan view. The bottom surface 341 (see Fig. 2(b) and Fig. 3) forms the upper shoe sliding surface 10a that slides against the lower shoe sliding surface 20a, which is the surface of the slide plate 22 of the lower shoe 20.

In addition, the slide bearing 34 is formed in a disk shape with a height that protrudes downward from the mounting recess 331 when mounted in the mounting recess 331 of the bearing holder 33, and the portion that is accommodated in the mounting recess 331 is the accommodated portion 342.
The bearing holder 33 and the slide bearing 34 configured as described above are bonded and fixed to the upper surface of the slide bearing 34 housed in the mounting recess 331 to form the assembled bearing 32.

The heat dissipation member 40 is attached to the outer circumferential surface 332 of the bearing holder 33 and dissipates heat generated in the sliding portion 30 .
Specifically, the contact plate portion 41 that contacts the outer peripheral surface 332 of the bearing holder 33 and the heat dissipation plate portion 42 that extends from the contact plate portion 41 form a substantial T-shape in plan view.

The contact plate portion 41 is formed from a metal plate of a predetermined thickness and has an arc shape in plan view so as to fit along the outer peripheral surface 332 of the bearing holder 33, which is circular in plan view.

The heat dissipation plate 42 is made of a metal plate having a predetermined thickness that extends outward from the center of the width of the contact plate 41. The heat dissipation plate 42 is arranged to extend radially along the bearing holder 33 when the contact plate 41 is attached to the outer peripheral surface 332 of the bearing holder 33.

In addition, when the heat dissipation member 40 is attached to the attachment recess 113 of the small diameter portion 112, the height of the bearing holder 33 protrudes downward from the lower end of the small diameter portion 112, that is, the height of the bearing holder 33 is approximately 2/3.

The heat dissipating member 40 configured in this manner is attached to the outer peripheral surface 332 of the bearing holder 33 so that the bottom surface of the bearing holder 33 and the lower end portion of the heat dissipating member 40 are substantially aligned with each other.
A plurality of heat dissipation members 40 are provided, and each of the plurality of heat dissipation members 40 is disposed at a predetermined interval in the circumferential direction.

In the sliding bearing device 1, whose elements are constructed as described above, the sliding bearing 34 is placed and adhesively fixed in the mounting recess 331 of the bearing holder 33, and the abutment plate portion 41 of the heat dissipation member 40 is mounted by abutting it against the outer peripheral surface 332 of the bearing holder 33.
Then, the elastic plate 31 is placed on the upper surface of the bearing holder 33, and is placed in the mounting recess 113 of the base pot 11, and the upper shoe 10 is assembled.

In addition, the slide plate 22 is attached to the upper surface of the sole plate 21 and the lower shoe 20 is assembled.
The pedestal portion 111 of the base pot 11 of the upper shoe 10 configured in this manner is fixed to the bottom surface 101 of the upper structure 100, and the upper shoe 10 is disposed on the upper structure 100, and the sole plate 21 of the lower shoe 20 is fixed to the upper surface 201 of the lower structure 200, and the lower shoe 20 is disposed on the lower structure 200. In this way, the sliding bearing device 1 can be assembled, in which the upper shoe sliding surface 10a of the upper shoe 10 provided on the upper structure 100 and the lower shoe sliding surface 20a of the lower shoe 20 provided on the lower structure 200 are configured to be slidable on each other.

As described above, the sliding bearing device 1 is composed of the upper shoe 10 and the lower shoe 20 arranged on the opposing parts of the upper structure 100 and the lower structure 200, and the upper shoe 10 of the sliding bearing device 1, in which the sliding surfaces 10a, 20a slide against each other at the opposing parts of the upper shoe 10 and the lower shoe 20, is provided with a synthetic resin slide bearing 34 that constitutes the upper shoe sliding surface 10a, a base pot 11 that holds the slide bearing 34, and a bearing holder 33. The lower shoe 20 is provided with a slide plate 22 that constitutes the lower shoe sliding surface 20a and on which the slide bearing 34 slides. The upper shoe 10 is provided with a heat dissipation member 40 having an abutment plate portion 41 that abuts against the bearing holder 33 and a heat dissipation plate portion 42 that extends outward from the abutment plate portion 41, so that changes in sliding properties due to frictional heat caused by the sliding of the slide bearing 34 against the slide plate 22 can be suppressed.

In more detail, when the upper shoe 10, which is equipped with a synthetic resin slide bearing 34, a base pot 11 that holds the slide bearing 34, and a bearing holder 33, moves relative to the lower shoe 20, which is equipped with a slide plate 22 on which the slide bearing 34 slides, the slide bearing 34 provided on the upper shoe 10 and the slide plate 22 provided on the lower shoe 20 slide against each other, and are heated by the frictional heat associated with the sliding.

However, since the upper shoe 10 is provided with a heat dissipation member 40 having a contact plate portion 41 that abuts against the bearing holder 33 and a heat dissipation plate portion 42 that extends outward from the contact plate portion 41, the heat generated by friction is conducted to the heat dissipation member 40 via the abutment plate portion 41.
The heat dissipation member 40 , to which heat is conducted via the contact plate portion 41 , can dissipate the heat by the heat dissipation plate portion 42 extending outward from the contact plate portion 41 .

As described above, the heat generated by the sliding of the slide bearing 34 against the slide plate 22 can be dissipated to the outside by the heat dissipation member 40, so that changes in the sliding properties caused by the frictional heat caused by the sliding of the slide bearing 34 against the slide plate 22 can be suppressed.

The upper shoe 10 is equipped with a bearing holder 33 that holds a slide bearing 34, and a base pot 11 that is fixed to the upper structure 100 and has a mounting recess 113 that accommodates a part of the bearing holder 33 so that it can move in the vertical direction H. The contact plate portion 41 of the heat dissipation member 40 is configured to contact the bearing holder 33, so that heat can be efficiently dissipated from the heat dissipation member 40.

In more detail, the contact plate portion 41 directly contacts the bearing holder 33 that holds the slide bearing 34, so that the frictional heat generated by the sliding of the slide bearing 34 against the slide plate 22 can be efficiently conducted to the heat dissipation member 40 and dissipated.

In addition, the contact plate portion 41 contacts the outer peripheral surface 332 of the bearing holder 33, and the heat dissipation plate portion 42 extends radially relative to the bearing holder 33, so that heat can be efficiently conducted to the heat dissipation member 40 via the contact plate portion 41 that contacts the outer peripheral surface 332 of the bearing holder 33 and dissipated.

In addition, the heat dissipation plate portion 42 extending outward from the contact plate portion 41 extends radially relative to the bearing holder 33, so it can be made large without interfering with the sliding between the slide plate 22 and the slide bearing 34, ensuring a large heat dissipation surface and allowing heat to be dissipated from the heat dissipation member 40 more efficiently.

The sliding bearing device 1a of the second embodiment will now be described with reference to Figures 4 to 6. Note that in the sliding bearing device 1a of the second embodiment, the same components as those in the sliding bearing device 1 described above will be given the same reference numerals and the description of those components will be omitted.

FIG. 4 shows an explanatory diagram of the sliding bearing device 1a of the second embodiment, FIG. 5 shows an explanatory diagram of the sliding bearing device 1a of the second embodiment, and FIG. 6 shows an exploded perspective view of the sliding bearing device 1a of the second embodiment.
In detail, Fig. 4(a) shows a front view of the sliding bearing device 1a, and Fig. 4(b) shows a vertical cross-sectional view of the sliding bearing device 1a. Fig. 5(a) shows a perspective view of the sliding bearing device 1a from above, and Fig. 5(b) shows a perspective view of the sliding bearing device 1a from below. In Fig. 5(b), the sole plate 21 is shown in a see-through state.

In the sliding bearing device 1 described above, multiple heat dissipation members 40, each consisting of an abutment plate portion 41 and a heat dissipation plate portion 42, were attached to the outer peripheral surface 332 of the bearing holder 33, but the sliding bearing device 1a is equipped with a single heat dissipation member 40a. Note that the sliding bearing device 1a is only equipped with a heat dissipation member 40a instead of the heat dissipation member 40 of the sliding bearing device 1, and the rest of the configuration is the same as that of the sliding bearing device 1, so a description thereof will be omitted.

Specifically, the heat dissipation member 40a includes a ring body 43 that fits onto the outer peripheral surface 332 of the bearing holder 33, and is configured by arranging a plurality of heat dissipation plate portions 42 around the ring body 43 at predetermined intervals in the circumferential direction.
The heat dissipation member 40 a configured in this manner can be attached to the bearing holder 33 by fitting it onto the outer circumferential surface 332 of the bearing holder 33 .

The sliding bearing device 1a equipped with the heat dissipation member 40a in this way has the same effect as the sliding bearing device 1 described above, and because the ring body 43 is formed in a ring shape that abuts against the outer peripheral surface 332 of the bearing holder 33, a large contact area between the bearing holder 33 and the ring body 43 can be ensured, and heat can be more efficiently conducted to the heat dissipation member 40a and dissipated.

In addition, since the ring body 43 is ring-shaped and abuts against the outer peripheral surface 332 of the bearing holder 33, by attaching the ring body 43 to the bearing holder 33, the heat dissipation member 40a will not accidentally fall off the bearing holder 33, and the sliding bearing device 1a can be used safely.

The third embodiment of the sliding bearing device 1b will now be described with reference to Figures 7 to 9. Note that the same components as those in the sliding bearing device 1 described above will be given the same reference numerals and the description of those components will be omitted.

FIG. 7 shows an explanatory diagram of the sliding bearing device 1b of the third embodiment, FIG. 8 shows an explanatory diagram of the sliding bearing device 1b of the third embodiment, and FIG. 9 shows an exploded perspective view of the sliding bearing device 1b of the third embodiment.
In detail, Fig. 7(a) shows a front view of the sliding bearing device 1b, and Fig. 7(b) shows a vertical cross-sectional view of the sliding bearing device 1b. Fig. 8(a) shows a perspective view of the sliding bearing device 1b from above, and Fig. 8(b) shows a perspective view of the sliding bearing device 1b from below. In Fig. 8(b), the sole plate 21 is shown in a see-through state.

In the sliding bearing device 1 described above, the heat dissipation member 40 is formed to a height at which the bearing holder 33 protrudes below the lower end of the small diameter portion 112 when attached to the mounting recess 113 of the small diameter portion 112, that is, a height that is approximately 2/3 of the height of the bearing holder 33. However, the heat dissipation member 40b in the sliding bearing device 1b is formed to be approximately the same height as the bearing holder 33.

When the heat dissipation member 40b is attached to the outer peripheral surface 332 so that the bottom surface of the bearing holder 33 and the lower end of the heat dissipation member 40b are aligned, the heat dissipation plate portion 42 of the heat dissipation member 40b bites into the small diameter portion 112 of the base pot 11 that houses the bearing holder 33 in the mounting recess 113. For this reason, the small diameter portion 112 is provided with a slide groove 114 that allows the heat dissipation plate portion 42 to be fitted in.
The slide grooves 114 are provided in correspondence with the heat dissipation plate portions 42 of the heat dissipation member 40 b which are arranged at predetermined intervals on the outer peripheral surface 332 of the bearing holder 33 .

The assembled bearing 32, the upper part of which is accommodated in the mounting recess 113, is accommodated so as to be slidable in the vertical direction H relative to the base pot 11. Therefore, the heat dissipation member 40b attached to the outer peripheral surface 332 of the bearing holder 33 constituting the assembled bearing 32 also slides in the vertical direction H relative to the base pot 11 as the assembled bearing 32 slides.
Therefore, the slide groove 114 is formed so that the heat dissipation plate portion 42 can slide in the vertical direction H, that is, the groove width is formed so that the heat dissipation plate portion 42 can be loosely fitted therein.

As described above, the heat dissipation member 40b is formed higher than the heat dissipation member 40 of the sliding bearing device 1, and a slide groove 114 is provided in the small diameter portion 112. Other than this, the other configurations of the sliding bearing device 1b are the same as those of the sliding bearing device 1, so a description thereof will be omitted.

As described above, the sliding bearing device 1b, in which the heat dissipation member 40b is formed higher than the heat dissipation member 40 of the sliding bearing device 1 and the small diameter portion 112 is provided with a slide groove 114, has the same effect as the sliding bearing device 1 described above, and the base pot 11 is provided with a slide groove 114 in which the heat dissipation plate portion 42 extending radially relative to the bearing holder 33 is loosely fitted so as to be movable in the vertical direction H, so that the heat dissipation plate portion 42 extending outward from the abutment plate portion 41 can be loosely fitted into the slide groove 114 provided in the base pot 11. Therefore, the heat dissipation plate portion 42 can be formed large without interfering with the movement of the bearing holder 33 in the vertical direction H relative to the base pot 11, which ensures a large heat dissipation surface, and allows heat to be dissipated from the heat dissipation member 40b more efficiently.

The fourth embodiment of the sliding bearing device 1c will now be described with reference to Figures 10 to 12. Note that the same components as those of the sliding bearing devices 1, 1a, and 1b described above will be given the same reference numerals and the description of those components will be omitted.

Figure 10 shows an explanatory diagram of the sliding bearing device 1c of the fourth embodiment, Figure 11 shows an explanatory diagram of the sliding bearing device 1c of the fourth embodiment, Figure 12 shows an exploded perspective view from above of the sliding bearing device 1c of the fourth embodiment, and Figure 13 shows an exploded perspective view from below of the sliding bearing device 1c of the fourth embodiment.

In detail, Fig. 10(a) shows a front view of the sliding bearing device 1c, and Fig. 10(b) shows a vertical cross-sectional view of the sliding bearing device 1c. Fig. 11(a) shows a perspective view of the sliding bearing device 1c from above, and Fig. 11(b) shows a perspective view of the sliding bearing device 1c from below. Note that the sole plate 21 is shown in a see-through state in Fig. 11(b).

In the above-mentioned sliding bearing devices 1, 1a, and 1b, the contact plate portion 41 and the ring body 43 of the heat dissipation member 40, 40a, and 40b are attached to the outer peripheral surface 332 of the bearing holder 33, and the frictional heat generated by the sliding of the upper shoe 10 against the lower shoe 20 is dissipated from the heat dissipation member 40, 40a, and 40b. In contrast, the sliding bearing device 1c is configured so that the heat of the sliding bearing 34 heated by the above-mentioned sliding is dissipated from the heat dissipation member 40c.

Specifically, the heat dissipation member 40c is composed of a covering portion 44 that abuts against the accommodated portion 342 accommodated in the mounting recess 331 of the bearing holder 33c in the slide bearing 34, and a heat dissipation plate portion 42c that extends outward from the covering portion 44.

The covering portion 44 is composed of a flat circular upper surface portion 441 that faces the upper surface of the slide bearing 34, and a side portion 442 that extends downward from the outer edge of the upper surface portion 441 and faces the side peripheral surface of the slide bearing 34.

As shown in Fig. 12, the heat dissipation plate portion 42c is formed in a plate shape extending upward and radially outward across the upper surface portion 441 and the side portion 442 of the covering portion 44. The heat dissipation plate portion 42c is formed to have the same height as the heat dissipation plate portion 42 of the heat dissipation member 40 in the sliding bearing device 1 described above.
A plurality of heat sink portions 42c configured in this manner are disposed radially about the covering portion 44 at equal intervals in the circumferential direction.

When the slide bearing 34 having the heat dissipation member 40c configured as described above placed over the accommodated portion 342 is placed in the mounting recess 331 of the bearing holder 33c, the heat dissipation plate portion 42c penetrates radially through the bearing holder 33c, so a slit 333 is provided in the bearing holder 33c through which the heat dissipation plate portion 42c can pass.
The slits 333 are provided at positions corresponding to the number and arrangement of the heat dissipation plate portions 42c of the heat dissipation member 40c.

The sliding bearing device 1c using the heat dissipation member 40c configured in this manner can be assembled by first mounting the heat dissipation member 40c to the accommodated portion 342 of the slide bearing 34, and then mounting the slide bearing 34 in the mounting recess 331 of the bearing holder 33c. Alternatively, the heat dissipation member 40c can be mounted in the mounting recess 331 of the bearing holder 33c, and then mounting the slide bearing 34 in the slit 333 in which the heat dissipation member 40c is arranged. At this time, the circumferential orientation is adjusted so that the heat dissipation plate portion 42c of the heat dissipation member 40c is mounted in the slit 333 provided in the bearing holder 33c.

As described above, the sliding bearing device 1c equipped with the heat dissipation member 40c having the covering portion 44 that covers the accommodated portion 342 of the slide bearing 34 mounted in the mounting recess 331 has the same effect as the sliding bearing device 1 described above, and the bearing holder 33c is provided with the mounting recess 331 that accommodates the accommodated portion 342 of the slide bearing 34, the covering portion 44 abuts against the accommodated portion 342 accommodated in the mounting recess 331 in the slide bearing 34, and the heat dissipation plate portion 42c is shaped to extend radially from the slide bearing 34 through the bearing holder 33c, so that the covering portion 44 abuts against the slide bearing 34 that is directly heated by frictional heat caused by sliding against the slide plate 22, and the heat dissipation member 40c can conduct heat even more through the covering portion 44. Therefore, heat can be dissipated even more from the heat dissipation member 40c.

In addition, in the slide bearing 34, the covering portion 44 is in contact with the accommodated portion 342 that is accommodated in the mounting recess 113 of the bearing holder 33c and is difficult to dissipate heat, so the heat dissipation member 40c can promote a decrease in the temperature of the slide bearing 34.

Furthermore, since the heat sink portion 42c passes through the slits 333 of the bearing holder 33c and extends radially relative to the slide bearing 34, the heat sink portion 42c can be made large without interfering with the sliding between the slide plate 22 and the slide bearing 34, i.e., a large heat dissipation surface is ensured, and heat can be dissipated from the heat sink member 40c more efficiently.

In addition, the covering portion 44 is formed in a shape that covers the accommodated portion 342, so that the covering portion 44 covers the accommodated portion 342, and a large contact area between the slide bearing 34 and the covering portion 44 can be secured. Therefore, heat can be more efficiently conducted to the heat dissipation member 40c and dissipated.

In addition, because the covering portion 44 covers the accommodated portion 342 accommodated in the mounting recess 331, that is, because the covering portion 44 is interposed between the mounting recess 331 and the accommodated portion 342, heat conduction from the slide bearing 34 to the bearing holder 33c is suppressed, and heat is conducted to the heat dissipation member 40c via the covering portion 44, allowing for efficient heat dissipation.

As described above, in the configuration of the present invention and the correspondence with the above-mentioned embodiment, the first structure of the present invention corresponds to the upper structure 100 of the embodiment,
Similarly,
The second structure corresponds to the lower structure 200,
The first shoe corresponds to the upper shoe 10,
The second shoe corresponds to the lower shoe 20;
The sliding surfaces correspond to the sliding surfaces 10a and 20a, the upper shoe sliding surface 10a, and the lower shoe sliding surface 20a.
The sliding member corresponds to the slide bearing 34,
The holding member corresponds to the base pot 11 and the bearing holder 33,
The sliding member corresponds to the slide plate 22.
The contact portion corresponds to the contact plate portion 41, the ring body 43, and the covering portion 44.
The heat dissipation portion corresponds to the heat dissipation plate portions 42 and 42c.
The heat dissipation members correspond to the heat dissipation members 40, 40a, 40b, and 40c.
The sliding bearings correspond to the sliding bearings 1, 1a, 1b, and 1c,
The holder corresponds to the bearing holder 33, 33c,
The fixed holding member corresponds to the base pot 11,
The receiving portion corresponds to the mounting recess 113,
The loose-fitting groove corresponds to the slide groove 114,
The receiving recess corresponds to the mounting recess 331,
The contained portion corresponds to contained portion 342,
The supporting direction corresponds to the up-down direction H, but is not limited to the above embodiment.

For example, in the above description, the heat dissipation plate portion 42c of the heat dissipation member 40c in the sliding bearing device 1c is formed to the same height as the heat dissipation plate portion 42 of the heat dissipation member 40 in the above-mentioned sliding bearing device 1, but it may be formed to the same height as the heat dissipation plate portion 42 in the heat dissipation member 40b in the sliding bearing device 1b. In this case, a slide groove 114 is provided in the base pot 11, similar to the sliding bearing device 1b.

In this case, the base pot 11 is also provided with a slide groove 114 into which the heat sink portion 42c, which extends radially relative to the slide bearing 34, fits loosely in the vertical direction H. Therefore, the heat sink portion 42c extending outward from the covering portion 44 can be loosely fitted into the slide groove 114 provided in the base pot 11. Therefore, the heat sink portion 42c can be made large without interfering with the movement of the assembled bearing 32 in the vertical direction H relative to the base pot 11, thereby ensuring a large heat dissipation surface and enabling more efficient heat dissipation from the heat sink member 40c.

In addition, instead of the covering portion 44 of the heat dissipation member 40c in the sliding bearing device 1c, it may be formed in a ring shape like the ring body 43 of the heat dissipation member 40a, and configured to be fitted onto the outer peripheral surface of the sliding bearing 34.

The heat dissipation member 40a in the sliding bearing device 1a may also be formed to the same height as the heat dissipation plate portion 42 in the heat dissipation member 40b in the sliding bearing device 1b, and a slide groove 114 may be provided in the base pot 11. As a result, the slide groove 114 in which the heat dissipation plate portion 42 extending radially relative to the bearing holder 33 fits loosely in the vertical direction H is provided in the base pot 11, so that the heat dissipation plate portion 42 extending outward from the ring body 43 can be loosely fitted in the slide groove 114 provided in the base pot 11. Therefore, the heat dissipation plate portion 42 can be formed large without interfering with the movement of the assembled bearing 32 in the vertical direction H relative to the base pot 11, which ensures a large heat dissipation surface, and allows heat to be dissipated from the heat dissipation member 40b more efficiently.

DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c...sliding bearing device 10...upper shoe 10a...upper shoe sliding surface 11...base pot 20...lower shoe 20a...lower shoe sliding surface 22...slide plate 33, 33c...bearing holder 34...slide bearing 40, 40a, 40b, 40c...heat dissipation member 41...contact plate portion 42, 42c...heat dissipation plate portion 43...ring body 44...covering portion 100...upper structure 113...mounting recess 114...slide groove 342...housed portion

Claims (4)

The vehicle is constituted by a first shoe and a second shoe disposed on opposing portions of the first structure and the second structure,
The first shoe of the sliding bearing device, in which the sliding surfaces of the first shoe and the second shoe slide against each other at the opposing portions of the first shoe and the second shoe, is provided with a sliding material made of synthetic resin that constitutes the sliding surface, and a holding member that holds the sliding material,
The second shoe is provided with a sliding member that constitutes the sliding surface and on which the sliding member slides,
The first shoe has:
a heat dissipation member having a contact portion that contacts at least one of the retaining member and the sliding member, and a heat dissipation portion that extends outward from the contact portion ;
The holding member is
A holder for holding the sliding member;
a fixed holding member that is fixed to the first structure and has an accommodation portion that accommodates a part of the holder so as to be movable in a support direction;
The contact portion of the heat dissipation member is configured to contact at least one of the holder and the sliding member,
The abutment portion is
abutting against the outer peripheral surface of the holder,
The heat dissipation portion extends in a radial direction relative to the holder.
Sliding bearing device. The fixed holding member has
2. The sliding bearing device according to claim 1 , further comprising a loose-fit groove in which the heat dissipating portion extends radially from the holder and is loosely fitted so as to be movable in the supporting direction. The vehicle is constituted by a first shoe and a second shoe disposed on opposing portions of the first structure and the second structure,
The first shoe of the sliding bearing device, in which the sliding surfaces of the first shoe and the second shoe slide against each other at the opposing portions of the first shoe and the second shoe, is provided with a sliding material made of synthetic resin that constitutes the sliding surface, and a holding member that holds the sliding material,
The second shoe is provided with a sliding member that constitutes the sliding surface and on which the sliding member slides,
The first shoe has:
a heat dissipation member having a contact portion that contacts at least one of the retaining member and the sliding member, and a heat dissipation portion that extends outward from the contact portion;
The holding member is
A holder for holding the sliding member;
a fixed holding member that is fixed to the first structure and has an accommodation portion that accommodates a part of the holder so as to be movable in a support direction;
The contact portion of the heat dissipation member is configured to contact at least one of the holder and the sliding member,
The holder is provided with an accommodation recess for accommodating a portion of the sliding member,
The abutment portion abuts against a portion of the sliding member accommodated in the accommodation recess,
The heat dissipation portion passes through the holder and extends radially relative to the sliding member. The fixed holding member has
4. The sliding bearing device according to claim 3 , further comprising a loose-fit groove extending radially from said sliding member and penetrating said holder, into which said heat dissipating portion is loosely fitted so as to be movable in said supporting direction.

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