CA2163963A1 - Seal for a shaft opening for a cross-country vehicle - Google Patents
Seal for a shaft opening for a cross-country vehicleInfo
- Publication number
- CA2163963A1 CA2163963A1 CA 2163963 CA2163963A CA2163963A1 CA 2163963 A1 CA2163963 A1 CA 2163963A1 CA 2163963 CA2163963 CA 2163963 CA 2163963 A CA2163963 A CA 2163963A CA 2163963 A1 CA2163963 A1 CA 2163963A1
- Authority
- CA
- Canada
- Prior art keywords
- ring
- seal
- incorporates
- groove
- wheel
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/54—Other sealings for rotating shafts
Abstract
A seal between a wheel hub and a wheel support of a cross-country vehicle, this consisting of at least one shaft seal (20) and a coarse seal that is arranged on the outside of this, this coarse seal consisting of a first ring (21) and a second ring (31), the first such ring being connected to the wheel hub (6) and the second being connected to the wheel mounting (1) in such a manner as to be unable to rotate independently. In order to create a seal that will keep water and abrasive dirt away from the sealing ring even under extreme conditions, one of the rings (21) incorporates an axial groove (24) and the other ring (31) incorporates an axial collar (32) that fits into this, a felt ring (25) being installed in the groove (24) and the space (33) being filled with grease.
Description
A Seal for a Shaft Opening for a Cross-country Vehicle The present invention relates to a seal between a wheel hub and a wheel mounting of a cross-country vehicle, this consisting of at least one shaft seal and a coarse seal that is arranged on the outside of this, this coarse seal consisting of a first ring and a second ring, the first such ring being connected to the wheel hub and the second being connected to the wheel mounting in such a manner as to be unable to rotate independently of it.
In cross-country vehicles, regardless of whether they are wheeled or tracked vehicles, there is a problem in that when negotiating bodies of water or swamp, it is not only water but also the sand that is always contained in this water that has to be kept away from the sensitive shaft seals.
A seal of this type is known from AT-PS 389 361. In this seal, the ring that is fixed to the wheel hub is a collar that is oriented towards the outside and forms a trap space, and the ring that is secured to the wheel mounting is a similar collar with an edge that overlaps the first ring on the outside. This thus forms a sealing gap that extends in a radial direction.
It has being found that when this solution is used, water and abrasive dirt cannot be kept away from the annular seal under extreme conditions (sand, great depths of water).
Consequently, its sensitive and soft sealing lip wears very rapidly and is destroyed. In addition, the sealing gap depends to a very great extent on maintaining the most precise size, installation, and roundness tolerances and this makes manufacture more costly. In addition, there is also the fact that the annular seal that is fixed to the shaft and intended to act as a thrower ring is not effective at low vehicle speeds. However, the consequence of rapid wear of the sealing ring is loss of function and may even result in the total failure of the drive system. In any case, the sealing ring must be replaced very frequently, and this entails extra costs and requires large amounts of time, since the seal is installed in a location that is difficult toget to and very confined.
For this reason, it is the task of the present invention to create a seal that effectively keeps water and abrasive dirt away from the seal under the severest conditions and, at the same time, imposes only small demands with respect to accuracy.
According to the present invention, this has been achieved in that one of the rings incorporates an axial groove and the other ring incorporates an axial collar that fits into this groove; a ring that is of a soft and compressible material being installed in the groove and the space between the two rings within the groove being filled with grease. It is preferred that the ring be of felt.
First of all, this creates an axial sealing gap that is not subject to precise tolerances. It is not necessary to center the rings, and at least one of the rings need only be bolted to its supporting element without any centering lugs. Because of the flexibility of the felt, installation does not have to be extremely precise in the axial direction, either. The felt ring, working in conjunction with the grease that is installed and acts radially within the system, provides a reliable and effective seal, even when the vehicle is stationary in deep water. The felt ring forms a flexible but nevertheless tight plug for the grease filling, as it were.
An advantageous development is such that the first ring also accommodates at least a shaft seal. This simplifies installation without any extra costs, since the sealing ring has to be precisely centered in any case. In addition, both installation and retro-fitting are simplified if the second ring incorporates the groove and the first ring incorporates the collar.
The present invention will be described in greater detail below, on the basis of embodiments that are shown in the drawings appended hereto. These drawings show the following:
igure 1: a longitudinal cross section through a first embodiment of a seal according to the present invention;
igure 2: a variation of Figure 1.
Figure 1 shows part of a wheel mounting 1 of a cross-country vehicle; the axis of rotation of the wheel is numbered 2. The wheel mounting 1 consists of a flange 3 that supports the king pin bearing (indicated by dashed lines, no reference number) and of a tubular section 4 that supports the roller bearings on which a hub 6 is supported so as to be able to rotate. Only the roller bearing 5 is shown in the drawing; the second bearing is located to the left of this, beyond the drawing. A
brake disk 8 is secured to the hub 6 by means of threaded bolts 7. Within the wheel mounting there is a wheel drive shaft 9 that is driven by a constant-velocity joint 10, is supported in bearings 11, and sealed by a seal 12, which is not an object of the present invention. The wheel drive shaft 9 is connected to the hub 6,so as to transmit driving force, at a point that is located outside the illustration.
A seal 20 is provided to ensure sealing between the wheel mounting 1 and the wheel hub 6; in this case, this is a radial-lip sealing ring. This is installed in a first ring 21 that is centered relative to the hub 6 and secured by means of a flange 22 that is similarly secured by threaded bolts 7.
Between the first ring 21 and the wheel hub there is an O-ring 23. This first ring 21 incorporates an axial groove 24 on its outer side that faces the wheel mounting l; a felt ring 25 is installed in the bottom of this groove. The thickness and density of this seating ring 2S are selected so as to be appropriate.
A second ring 31 is secured, uncentered, to the wheel mounting 1 by means of threaded bolts 30. In this case, uncentered is understood to mean that no centering lugs are provided on the wheel mounting l; centering is effected only by the threaded bolts 30. The second ring 31 incorporates an axial collar 32 that fits into the axial groove 24 of the first ring 21 and touches the felt ring 25. The space between the two rings 21, 31, the wheel mounting, and the felt ring 25 contains the grease filling 33. The two rings 21, 31, the felt ring 25, and the grease filling 33 form the coarse seal that keeps water and the sand that it may contain away from the seal 20, even when it is under great pressure.
The embodiment that is shown in Figure 2 differs from the above only in that the first ring 21' incorporates the axial collar 32' and the second ring 31' incorporates the axial groove 24. This embodiment functions in the same way as the one described heretofore.
In cross-country vehicles, regardless of whether they are wheeled or tracked vehicles, there is a problem in that when negotiating bodies of water or swamp, it is not only water but also the sand that is always contained in this water that has to be kept away from the sensitive shaft seals.
A seal of this type is known from AT-PS 389 361. In this seal, the ring that is fixed to the wheel hub is a collar that is oriented towards the outside and forms a trap space, and the ring that is secured to the wheel mounting is a similar collar with an edge that overlaps the first ring on the outside. This thus forms a sealing gap that extends in a radial direction.
It has being found that when this solution is used, water and abrasive dirt cannot be kept away from the annular seal under extreme conditions (sand, great depths of water).
Consequently, its sensitive and soft sealing lip wears very rapidly and is destroyed. In addition, the sealing gap depends to a very great extent on maintaining the most precise size, installation, and roundness tolerances and this makes manufacture more costly. In addition, there is also the fact that the annular seal that is fixed to the shaft and intended to act as a thrower ring is not effective at low vehicle speeds. However, the consequence of rapid wear of the sealing ring is loss of function and may even result in the total failure of the drive system. In any case, the sealing ring must be replaced very frequently, and this entails extra costs and requires large amounts of time, since the seal is installed in a location that is difficult toget to and very confined.
For this reason, it is the task of the present invention to create a seal that effectively keeps water and abrasive dirt away from the seal under the severest conditions and, at the same time, imposes only small demands with respect to accuracy.
According to the present invention, this has been achieved in that one of the rings incorporates an axial groove and the other ring incorporates an axial collar that fits into this groove; a ring that is of a soft and compressible material being installed in the groove and the space between the two rings within the groove being filled with grease. It is preferred that the ring be of felt.
First of all, this creates an axial sealing gap that is not subject to precise tolerances. It is not necessary to center the rings, and at least one of the rings need only be bolted to its supporting element without any centering lugs. Because of the flexibility of the felt, installation does not have to be extremely precise in the axial direction, either. The felt ring, working in conjunction with the grease that is installed and acts radially within the system, provides a reliable and effective seal, even when the vehicle is stationary in deep water. The felt ring forms a flexible but nevertheless tight plug for the grease filling, as it were.
An advantageous development is such that the first ring also accommodates at least a shaft seal. This simplifies installation without any extra costs, since the sealing ring has to be precisely centered in any case. In addition, both installation and retro-fitting are simplified if the second ring incorporates the groove and the first ring incorporates the collar.
The present invention will be described in greater detail below, on the basis of embodiments that are shown in the drawings appended hereto. These drawings show the following:
igure 1: a longitudinal cross section through a first embodiment of a seal according to the present invention;
igure 2: a variation of Figure 1.
Figure 1 shows part of a wheel mounting 1 of a cross-country vehicle; the axis of rotation of the wheel is numbered 2. The wheel mounting 1 consists of a flange 3 that supports the king pin bearing (indicated by dashed lines, no reference number) and of a tubular section 4 that supports the roller bearings on which a hub 6 is supported so as to be able to rotate. Only the roller bearing 5 is shown in the drawing; the second bearing is located to the left of this, beyond the drawing. A
brake disk 8 is secured to the hub 6 by means of threaded bolts 7. Within the wheel mounting there is a wheel drive shaft 9 that is driven by a constant-velocity joint 10, is supported in bearings 11, and sealed by a seal 12, which is not an object of the present invention. The wheel drive shaft 9 is connected to the hub 6,so as to transmit driving force, at a point that is located outside the illustration.
A seal 20 is provided to ensure sealing between the wheel mounting 1 and the wheel hub 6; in this case, this is a radial-lip sealing ring. This is installed in a first ring 21 that is centered relative to the hub 6 and secured by means of a flange 22 that is similarly secured by threaded bolts 7.
Between the first ring 21 and the wheel hub there is an O-ring 23. This first ring 21 incorporates an axial groove 24 on its outer side that faces the wheel mounting l; a felt ring 25 is installed in the bottom of this groove. The thickness and density of this seating ring 2S are selected so as to be appropriate.
A second ring 31 is secured, uncentered, to the wheel mounting 1 by means of threaded bolts 30. In this case, uncentered is understood to mean that no centering lugs are provided on the wheel mounting l; centering is effected only by the threaded bolts 30. The second ring 31 incorporates an axial collar 32 that fits into the axial groove 24 of the first ring 21 and touches the felt ring 25. The space between the two rings 21, 31, the wheel mounting, and the felt ring 25 contains the grease filling 33. The two rings 21, 31, the felt ring 25, and the grease filling 33 form the coarse seal that keeps water and the sand that it may contain away from the seal 20, even when it is under great pressure.
The embodiment that is shown in Figure 2 differs from the above only in that the first ring 21' incorporates the axial collar 32' and the second ring 31' incorporates the axial groove 24. This embodiment functions in the same way as the one described heretofore.
Claims (4)
1. A seal between a wheel hub and a wheel support of a cross-country vehicle, this consisting of at least one shaft seal (20) and a coarse seal that is arranged on the outside of this, this coarse seal consisting of a first ring (21) and a second ring (31), the first such ring being connected to the wheel hub (6) and the second being connected to the wheel mounting (1) in such a manner as to be unable to rotate independently of it, characterized in that one of the rings (21; 31') incorporates an axial groove (24; 24') and the other ring (31; 21') incorporates a collar (32; 32') that fits into this, a ring (25) that is of a soft and compressible material being installed in the groove (24; 24') and the space (33) between the two rings (21, 31; 21', 31') within the groove being filled with grease.
2. A seal as defined in Claim 1, characterized in that the ring (25) is of felt.
3. A seal as defined in Claim 1, characterized in that the first ring (21; 21') accommodates at least one shaft seal (20).
4. A seal as defined in Claim 1, characterized in that the first ring (21) incorporates the groove (24) and the second ring (31) incorporates the collar (32).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT46094U AT688U1 (en) | 1994-11-29 | 1994-11-29 | SEALING A SHAFT PERFORMANCE FOR AN ALL-ROUND VEHICLE |
| ATGM460/94 | 1994-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2163963A1 true CA2163963A1 (en) | 1996-05-30 |
Family
ID=3491221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2163963 Abandoned CA2163963A1 (en) | 1994-11-29 | 1995-11-28 | Seal for a shaft opening for a cross-country vehicle |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0715104B1 (en) |
| AT (1) | AT688U1 (en) |
| CA (1) | CA2163963A1 (en) |
| DE (1) | DE59507740D1 (en) |
| PL (1) | PL176915B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021111308A1 (en) | 2021-05-03 | 2022-11-03 | Bayerische Motoren Werke Aktiengesellschaft | Sealing element for a shaft, sealing arrangement and electric drive train |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1475879A1 (en) * | 1965-11-02 | 1969-06-04 | Wissenschaftlich Tech Zentrum | Shaft seal, optionally usable as a non-contact or contact seal |
| AT389361B (en) | 1988-06-21 | 1989-11-27 | Steyr Daimler Puch Ag | SEALING A POLLUTION AND / OR CORROSION HAZARDOUS WAY THROUGH A LUBRICANT-CONTAINING HOUSING |
| US5028054A (en) * | 1990-07-13 | 1991-07-02 | Fmc Corporation | Idler roller bearing and seal |
-
1994
- 1994-11-29 AT AT46094U patent/AT688U1/en not_active IP Right Cessation
-
1995
- 1995-11-23 PL PL95311465A patent/PL176915B1/en not_active IP Right Cessation
- 1995-11-26 EP EP19950118604 patent/EP0715104B1/en not_active Expired - Lifetime
- 1995-11-26 DE DE59507740T patent/DE59507740D1/en not_active Expired - Lifetime
- 1995-11-28 CA CA 2163963 patent/CA2163963A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AT688U1 (en) | 1996-03-25 |
| PL176915B1 (en) | 1999-08-31 |
| PL311465A1 (en) | 1996-06-10 |
| EP0715104B1 (en) | 2000-02-02 |
| EP0715104A1 (en) | 1996-06-05 |
| DE59507740D1 (en) | 2000-03-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |