CA2777281A1 - Improved cushioning and self-cooling of a semi-solid tire - Google Patents
Improved cushioning and self-cooling of a semi-solid tire Download PDFInfo
- Publication number
- CA2777281A1 CA2777281A1 CA2777281A CA2777281A CA2777281A1 CA 2777281 A1 CA2777281 A1 CA 2777281A1 CA 2777281 A CA2777281 A CA 2777281A CA 2777281 A CA2777281 A CA 2777281A CA 2777281 A1 CA2777281 A1 CA 2777281A1
- Authority
- CA
- Canada
- Prior art keywords
- voids
- tire
- bosses
- tire system
- flat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000007787 solid Substances 0.000 title description 8
- 238000001816 cooling Methods 0.000 title description 2
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/24—Non-inflatable or solid tyres characterised by means for securing tyres on rim or wheel body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/10—Non-inflatable or solid tyres characterised by means for increasing resiliency
- B60C7/107—Non-inflatable or solid tyres characterised by means for increasing resiliency comprising lateral openings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
A tire system for mounting on a wheel rim, the tire system including a tire having a pair of sides, a radially inner portion engageable with the wheel rim, a plurality of voids impressed into the both the front side and the back side, and a plurality of bosses which correspond to the plurality of voids, wherein the plurality of voids each include a larger outer chamber and a smaller inner chamber.
Description
IMPROVED CUSHIONING AND SELF-COOLING OF A SEMI-SOLID TIRE
Field of the Invention This invention relates to a tire, and more particularly to an improved cushioning and self-cooling of a semi-solid tire.
Background of the Invention There have been various proposals for tires of vehicles. Typically, such tires comprise an annular body formed of elastomeric material such as rubber. There have also been various proposals for attachments of the annular body to a wheel rim, including moulding the annular body of a tire on to the rim portion of the wheel or forming the annular body separately (either as a one-piece unit or in segments) and then releaseably fastening the annular body to the rim portion of the wheel.
The solid and semisolid tire were created primarily for eliminating the danger of explosion and downtime due to punctures in the pneumatic tire.
The first response was a solid tire, which was then followed by a rubber/foam filled pneumatic tire. These are heavy puncture proof tires that in time damage the axles and transmission of the vehicles.
The next advancement was a light semi-solid tire, which eliminates the danger to the vehicle. This will improve the cushioning somewhat, however, one problem is that heat accumulates in the rubber with the repeated deformation.
It has also been found that welding should not occur close to the rubber bonding agent, because it is found to unstitch the rubber.
It is against this background, and the problems and difficulties associated therewith, that the present invention has been developed.
Summary of the Invention According to a first aspect of the present invention there is provided a tire system to be mounted on a wheel rim, the tire system comprising a tire having a pair of sides, a radially inner portion engageable with the wheel rim, a plurality of voids impressed into the both the front side and the back side, and a plurality of bosses which correspond to the plurality of voids, wherein the plurality of voids each include a larger outer chamber and a smaller inner chamber.
Preferably, the plurality of voids vary in size, and the plurality of bosses include bosses of varying size which do not completely fill the plurality of voids.
The bosses of varying size may include bosses which only fill the larger outer chamber.
In one embodiment, a plurality of secondary voids is located radially outwards from the plurality of voids. A plurality of secondary bosses may correspond to the plurality of secondary voids.
In another embodiment, the system includes a plurality of tunnels, wherein each tunnel extends between two of the plurality of voids.
In a further embodiment, each tunnel extends between one of the plurality of voids in one of the pair of sides and another of the plurality of voids in the other of the pair of sides. As well, each tunnel may extend between the smaller inner chamber of one of the plurality of voids and the larger outer chamber of another of the plurality of voids.
In another embodiment, each of the smaller inner chambers includes two tunnels which each extend to a different one of the larger outer chambers.
According to another aspect of the invention, there is provided a tire system comprising a modified rim, which includes a disk having a radially outer portion, a flat rim ring welded to the radially outer portion of the disk, and a plurality of flat gussets welded to the disk and the flat rim ring. The tire system also includes a tire having a rubber layer having a radially inner portion and a pair of sides, a flat tire ring glued to the radially inner portion of the rubber layer, a plurality of voids impressed into both of the pair of sides, and a plurality of bosses which correspond to the plurality of voids, wherein the plurality of voids each include a larger outer chamber and a smaller inner chamber. The flat tire ring is mounted on the flat rim ring by slight interference pressing, and a plurality of anti-slippage dowels is inserted through the flat rim ring, the flat tire ring, and slightly into the rubber layer.
The invention will be better understood by reference to the following description of one specific embodiment thereof as shown in the accompanying drawings.
Brief Description of the Drawings Figure 1 is a half cross-sectional view of the tire according to the first embodiment of the invention.
Figure 2 is a half cross-sectional view of the tire according to another embodiment of the invention.
Figure 3 is a side view of a cross-section of the tire.
Figure 4 shows the varying shapes and sizes of the bosses.
Figure 5 is a side view of the portion of the tire according to another embodiment of the invention.
Figure 6 is a perspective view of a portion of the tire according to another embodiment of the invention.
Figure 7 is a half cross-sectional view of the tire according to another embodiment of the invention.
Description of Preferred Embodiment Figures 1 and 2 show a semi-solid tire 10 according to a first embodiment. The tire 10 includes a pair of sides and a radially inner portion, which is adapted to be fitted onto a conventional wheel rim 12 designed for tires, such as pneumatic tires. The wheel rim 12 has a tire support surface 14 incorporating a seat 16 on each side of the rim 12 adjacent the rim edge 18.
In the wheel rim design shown in Figure 1, a layer of low quality rubber 20 is glued with adhesive to the pneumatic rim 12. A layer of high quality rubber 22 is laid on, then tread rubber 24 is laid on the top.
In the wheel rim design shown in Figure 2, a flat sheet ring 32 is welded inside the rim 12, then a flat band 34 is welded on the top of rim 12 at the sides. For stopping the internal ring to slip aside under pressure, holes 36 are drilled and filled up with spot-welding. This way, a strengthened rim is obtained, and the rest of rubber casting procedure continues.
In the preferred embodiment, through the moulding process, a plurality of voids 26 is impressed into both sides of the rubber. In this preferred embodiment, each of the plurality of voids 26 include a larger outer chamber 28, and a smaller inner chamber 30.
These voids can be used to tune the cushioning of the wheel.
A cross-section of a plurality of voids 26 is shown in Figure 3.
Figure 4 shows the flexibility of the varying shapes and sizes of the bosses 38. As illustrated, the bosses 38 include a larger base portion 46, and a smaller tip portion 48, which correspond to the shape of the main voids 26. As shown in Figure 4, the smaller tip portion may be of variable length L and diameter D, as the wheel user requests. As well, the edges of the larger base portion can be rounded, or angled, as shown. If a tougher wheel is needed, the smaller inner chamber 30 can be closed/eliminated by filling the smaller tip portion 48 with plug 40.
A further preferred embodiment is shown in Figure 5, where the cushioning can be improved further by additional side voids 42. These side voids 42 offer the advantage of becoming part of the tread when the tread band had worn to their level, and the wheel is still in ride-able condition. These side voids 42 may also include corresponding side bosses (not shown), which are also variable, like bosses 38.
There are cases when the contact area with the ground must be increased. A
method to further soften the cushioning is providing variable sized communicating tunnels 44 between the main voids 26. As can be seen in Figure 6, the preferred embodiment includes two of the communicating tunnels 44 extending from each of the smaller inner chambers 30, with each of the two tunnels 44 extending to a different larger outer chamber 28.
The present invention improves the cushioning for various applications, by applying more or less bosses into the voids in the load bearing rubber. For a more rigid tire to be used in applications such as mining, one would use more bosses and less voids. For a softer tire, used in applications such as sand, the less bosses and more voids. A well-balanced rubber semi-solid tire can be used for 4-wheel drive, and military types, as primarily puncture-proof.
The combination of the main voids 26, the side voids 42, and the communicating tunnels 44 contributes to the self-venting of the tire 10.
For heavier loads and expected rapid wearing of the tread, it is easier to change the rubber part of the wheel, install a new rubber, than to spend time to retread the worn rubber.
While a conventional wheel rim 12 is shown in Figures 1 and 2, Figure 7 shows another embodiment of the invention which includes a special rim 50. The modified rim 50 is fabricated of a rolled flat rim ring 58 welded on a disk 54, strengthened with flat gussets 56. The rim 50 is machined on top to leave an axial anti-slippage shoulder. The tire portion includes a flat tire ring 60, with high quality rubber 22 bonded to it. This is typically done with glue. Tread 24 is then glued on top. Similar to the embodiment described above, a plurality of voids 26 is impressed into both sides of the rubber. The flat rim ring 52 and the flat tire ring 60 are mounted together by slight interference pressing. Holes are drilled through both plates, slightly protruding into the high quality rubber 22, for anti-slippage headed dowels 62. The dowels 62 are fastened by spot welding, and dismounted by grinding the welding away. The anti-slippage dowels 62 are against axial (side) slippage, and radial slippage due to the traction torque load.
This embodiment allows for the tire to be held in place on the rim, without the use of welding.
The scope of the claims should not be limited by the preferred embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole.
Field of the Invention This invention relates to a tire, and more particularly to an improved cushioning and self-cooling of a semi-solid tire.
Background of the Invention There have been various proposals for tires of vehicles. Typically, such tires comprise an annular body formed of elastomeric material such as rubber. There have also been various proposals for attachments of the annular body to a wheel rim, including moulding the annular body of a tire on to the rim portion of the wheel or forming the annular body separately (either as a one-piece unit or in segments) and then releaseably fastening the annular body to the rim portion of the wheel.
The solid and semisolid tire were created primarily for eliminating the danger of explosion and downtime due to punctures in the pneumatic tire.
The first response was a solid tire, which was then followed by a rubber/foam filled pneumatic tire. These are heavy puncture proof tires that in time damage the axles and transmission of the vehicles.
The next advancement was a light semi-solid tire, which eliminates the danger to the vehicle. This will improve the cushioning somewhat, however, one problem is that heat accumulates in the rubber with the repeated deformation.
It has also been found that welding should not occur close to the rubber bonding agent, because it is found to unstitch the rubber.
It is against this background, and the problems and difficulties associated therewith, that the present invention has been developed.
Summary of the Invention According to a first aspect of the present invention there is provided a tire system to be mounted on a wheel rim, the tire system comprising a tire having a pair of sides, a radially inner portion engageable with the wheel rim, a plurality of voids impressed into the both the front side and the back side, and a plurality of bosses which correspond to the plurality of voids, wherein the plurality of voids each include a larger outer chamber and a smaller inner chamber.
Preferably, the plurality of voids vary in size, and the plurality of bosses include bosses of varying size which do not completely fill the plurality of voids.
The bosses of varying size may include bosses which only fill the larger outer chamber.
In one embodiment, a plurality of secondary voids is located radially outwards from the plurality of voids. A plurality of secondary bosses may correspond to the plurality of secondary voids.
In another embodiment, the system includes a plurality of tunnels, wherein each tunnel extends between two of the plurality of voids.
In a further embodiment, each tunnel extends between one of the plurality of voids in one of the pair of sides and another of the plurality of voids in the other of the pair of sides. As well, each tunnel may extend between the smaller inner chamber of one of the plurality of voids and the larger outer chamber of another of the plurality of voids.
In another embodiment, each of the smaller inner chambers includes two tunnels which each extend to a different one of the larger outer chambers.
According to another aspect of the invention, there is provided a tire system comprising a modified rim, which includes a disk having a radially outer portion, a flat rim ring welded to the radially outer portion of the disk, and a plurality of flat gussets welded to the disk and the flat rim ring. The tire system also includes a tire having a rubber layer having a radially inner portion and a pair of sides, a flat tire ring glued to the radially inner portion of the rubber layer, a plurality of voids impressed into both of the pair of sides, and a plurality of bosses which correspond to the plurality of voids, wherein the plurality of voids each include a larger outer chamber and a smaller inner chamber. The flat tire ring is mounted on the flat rim ring by slight interference pressing, and a plurality of anti-slippage dowels is inserted through the flat rim ring, the flat tire ring, and slightly into the rubber layer.
The invention will be better understood by reference to the following description of one specific embodiment thereof as shown in the accompanying drawings.
Brief Description of the Drawings Figure 1 is a half cross-sectional view of the tire according to the first embodiment of the invention.
Figure 2 is a half cross-sectional view of the tire according to another embodiment of the invention.
Figure 3 is a side view of a cross-section of the tire.
Figure 4 shows the varying shapes and sizes of the bosses.
Figure 5 is a side view of the portion of the tire according to another embodiment of the invention.
Figure 6 is a perspective view of a portion of the tire according to another embodiment of the invention.
Figure 7 is a half cross-sectional view of the tire according to another embodiment of the invention.
Description of Preferred Embodiment Figures 1 and 2 show a semi-solid tire 10 according to a first embodiment. The tire 10 includes a pair of sides and a radially inner portion, which is adapted to be fitted onto a conventional wheel rim 12 designed for tires, such as pneumatic tires. The wheel rim 12 has a tire support surface 14 incorporating a seat 16 on each side of the rim 12 adjacent the rim edge 18.
In the wheel rim design shown in Figure 1, a layer of low quality rubber 20 is glued with adhesive to the pneumatic rim 12. A layer of high quality rubber 22 is laid on, then tread rubber 24 is laid on the top.
In the wheel rim design shown in Figure 2, a flat sheet ring 32 is welded inside the rim 12, then a flat band 34 is welded on the top of rim 12 at the sides. For stopping the internal ring to slip aside under pressure, holes 36 are drilled and filled up with spot-welding. This way, a strengthened rim is obtained, and the rest of rubber casting procedure continues.
In the preferred embodiment, through the moulding process, a plurality of voids 26 is impressed into both sides of the rubber. In this preferred embodiment, each of the plurality of voids 26 include a larger outer chamber 28, and a smaller inner chamber 30.
These voids can be used to tune the cushioning of the wheel.
A cross-section of a plurality of voids 26 is shown in Figure 3.
Figure 4 shows the flexibility of the varying shapes and sizes of the bosses 38. As illustrated, the bosses 38 include a larger base portion 46, and a smaller tip portion 48, which correspond to the shape of the main voids 26. As shown in Figure 4, the smaller tip portion may be of variable length L and diameter D, as the wheel user requests. As well, the edges of the larger base portion can be rounded, or angled, as shown. If a tougher wheel is needed, the smaller inner chamber 30 can be closed/eliminated by filling the smaller tip portion 48 with plug 40.
A further preferred embodiment is shown in Figure 5, where the cushioning can be improved further by additional side voids 42. These side voids 42 offer the advantage of becoming part of the tread when the tread band had worn to their level, and the wheel is still in ride-able condition. These side voids 42 may also include corresponding side bosses (not shown), which are also variable, like bosses 38.
There are cases when the contact area with the ground must be increased. A
method to further soften the cushioning is providing variable sized communicating tunnels 44 between the main voids 26. As can be seen in Figure 6, the preferred embodiment includes two of the communicating tunnels 44 extending from each of the smaller inner chambers 30, with each of the two tunnels 44 extending to a different larger outer chamber 28.
The present invention improves the cushioning for various applications, by applying more or less bosses into the voids in the load bearing rubber. For a more rigid tire to be used in applications such as mining, one would use more bosses and less voids. For a softer tire, used in applications such as sand, the less bosses and more voids. A well-balanced rubber semi-solid tire can be used for 4-wheel drive, and military types, as primarily puncture-proof.
The combination of the main voids 26, the side voids 42, and the communicating tunnels 44 contributes to the self-venting of the tire 10.
For heavier loads and expected rapid wearing of the tread, it is easier to change the rubber part of the wheel, install a new rubber, than to spend time to retread the worn rubber.
While a conventional wheel rim 12 is shown in Figures 1 and 2, Figure 7 shows another embodiment of the invention which includes a special rim 50. The modified rim 50 is fabricated of a rolled flat rim ring 58 welded on a disk 54, strengthened with flat gussets 56. The rim 50 is machined on top to leave an axial anti-slippage shoulder. The tire portion includes a flat tire ring 60, with high quality rubber 22 bonded to it. This is typically done with glue. Tread 24 is then glued on top. Similar to the embodiment described above, a plurality of voids 26 is impressed into both sides of the rubber. The flat rim ring 52 and the flat tire ring 60 are mounted together by slight interference pressing. Holes are drilled through both plates, slightly protruding into the high quality rubber 22, for anti-slippage headed dowels 62. The dowels 62 are fastened by spot welding, and dismounted by grinding the welding away. The anti-slippage dowels 62 are against axial (side) slippage, and radial slippage due to the traction torque load.
This embodiment allows for the tire to be held in place on the rim, without the use of welding.
The scope of the claims should not be limited by the preferred embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole.
Claims (12)
1. A tire system to be mounted on a wheel rim, the tire system comprising:
a tire having a pair of sides;
a radially inner portion engageable with the wheel rim;
a plurality of voids impressed into both of the pair of sides; and a plurality of bosses which correspond to the plurality of voids;
wherein the plurality of voids each include a larger outer chamber and a smaller inner chamber.
a tire having a pair of sides;
a radially inner portion engageable with the wheel rim;
a plurality of voids impressed into both of the pair of sides; and a plurality of bosses which correspond to the plurality of voids;
wherein the plurality of voids each include a larger outer chamber and a smaller inner chamber.
2. The tire system of claim 1, wherein the plurality of voids vary in size.
3. The tire system of claim 1 or 2, wherein the plurality of bosses include bosses of varying size which do not completely fill the plurality of voids.
4. The tire system of claim 3, wherein the bosses of varying size include bosses which only fill the larger outer chamber.
5. The tire system of any one of claims 1 to 4, further including a plurality of secondary voids located radially outwards from the plurality of voids.
6. The tire system of claim 5, further including a plurality of secondary bosses correspond to the plurality of secondary voids.
7. The tire system of any one of claims 1 to 6, further including a plurality of tunnels, wherein each tunnel extends between two of the plurality of voids.
8. The tire system of claim 7, wherein each tunnel extends between one of the plurality of voids in one of the pair of sides and another of the plurality of voids in the other of thepair of sides.
9. The tire system of claim 7, wherein each tunnel extends between the smaller inner chamber of one of the plurality of voids and the larger outer chamber of another of the plurality of voids.
10. The tire system of claim 8, wherein each tunnel extends between the smaller inner chamber of the one of the plurality of voids and the larger outer chamber of the another of the plurality of voids.
11. The tire system of any one of claims 7 to 10, wherein each of the smaller inner chambers includes two tunnels which each extend to a different one of the larger outer chambers.
12. A tire system, comprising:
a modified rim including:
a disk, having a radially outer portion;
a flat rim ring welded to the radially outer portion of the disk; and a plurality of flat gussets welded to the disk and the flat rim ring;
a tire including:
a rubber layer having a radially inner portion and a pair of sides;
a flat tire ring glued to the radially inner portion of the rubber layer;
a plurality of voids impressed into both of the pair of sides; and a plurality of bosses which correspond to the plurality of voids; and wherein the plurality of voids each include a larger outer chamber and a smaller inner chamber;
wherein the flat tire ring is mounted on the flat rim ring by slight interference pressing;
and wherein a plurality of anti-slippage dowels is inserted through the flat rim ring, the flat tire ring, and slightly into the rubber layer.
a modified rim including:
a disk, having a radially outer portion;
a flat rim ring welded to the radially outer portion of the disk; and a plurality of flat gussets welded to the disk and the flat rim ring;
a tire including:
a rubber layer having a radially inner portion and a pair of sides;
a flat tire ring glued to the radially inner portion of the rubber layer;
a plurality of voids impressed into both of the pair of sides; and a plurality of bosses which correspond to the plurality of voids; and wherein the plurality of voids each include a larger outer chamber and a smaller inner chamber;
wherein the flat tire ring is mounted on the flat rim ring by slight interference pressing;
and wherein a plurality of anti-slippage dowels is inserted through the flat rim ring, the flat tire ring, and slightly into the rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2777281A CA2777281A1 (en) | 2012-05-16 | 2012-05-16 | Improved cushioning and self-cooling of a semi-solid tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2777281A CA2777281A1 (en) | 2012-05-16 | 2012-05-16 | Improved cushioning and self-cooling of a semi-solid tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2777281A1 true CA2777281A1 (en) | 2013-11-16 |
Family
ID=49577941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2777281A Abandoned CA2777281A1 (en) | 2012-05-16 | 2012-05-16 | Improved cushioning and self-cooling of a semi-solid tire |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2777281A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017097375A1 (en) * | 2015-12-11 | 2017-06-15 | Artic Investments S.A. | Non-pneumatic tyre with an improved cavity aperture |
-
2012
- 2012-05-16 CA CA2777281A patent/CA2777281A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017097375A1 (en) * | 2015-12-11 | 2017-06-15 | Artic Investments S.A. | Non-pneumatic tyre with an improved cavity aperture |
| US11407254B2 (en) | 2015-12-11 | 2022-08-09 | Compagnie Generale Des Etablissements Michelin | Non-pneumatic tyre with an improved cavity aperture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20150506 |