CA2189927A1 - Sealing assembly for a cross member - Google Patents
Sealing assembly for a cross memberInfo
- Publication number
- CA2189927A1 CA2189927A1 CA002189927A CA2189927A CA2189927A1 CA 2189927 A1 CA2189927 A1 CA 2189927A1 CA 002189927 A CA002189927 A CA 002189927A CA 2189927 A CA2189927 A CA 2189927A CA 2189927 A1 CA2189927 A1 CA 2189927A1
- Authority
- CA
- Canada
- Prior art keywords
- face
- sealing
- seal
- arm
- bearing bush
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 52
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 description 4
- 230000000284 resting effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
- F16C21/005—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement the external zone of a bearing with rolling members, e.g. needles, being cup-shaped, with or without a separate thrust-bearing disc or ring, e.g. for universal joints
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7809—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for needle roller bearings
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
- F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
- F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
- F16D3/385—Bearing cup; Bearing construction; Bearing seal; Mounting of bearing on the intermediate member
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
- F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
- F16D3/40—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes
- F16D3/41—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes with ball or roller bearings
-
- 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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
-
- 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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
- F16J15/3276—Mounting of sealing rings with additional static sealing between the sealing, or its casing or support, and the surface on which it is mounted
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/41—Couplings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Of Bearings (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention relates to a sealing assembly for the cross member 4 of a universal joint 1, which cross member 4 is non-rotatingly connected to the arm 5 and, for this purpose, rest on a seat face 15. The seal 16 comprises two portions 17, 28 of which the first portion 17, by means of an annular recess 21, is divided into a sealing portion 18 and a fixing portion 22. The second portion 28 embraces the open end face 12 of the bearing bush 8 and, by means of a sealing lip 30, rests on the outer face 29 of the bearing bush 8. This measure makes it possible for the pretension for fixing the seal 16 on the arm 5 and the pretension of the sealing lips 19 relative to the sealing face 20 to be determined independently of one another.
Description
2~ ~9927 SEALING ASSENBLY FOR A CROSS NEMBER
Description It is the object of the invention to provide a sealing assembly for the rotatable support of the arms of a cross member of a universal joint around the associated arm axis, having a seal comprising a first portion which is arranged in the annular space between a seat face for the first portion and a sealing face provided on the inner face of a bearing bush supporting an arm and which firmly rests on the seat face, and further comprising a second portion which, starting from the first portion, embraces the edge of the open end face of the bearing bush and, for sealing purposes, rests against the outer face of the bearing bush.
Such a sealing assembly is described in DE 25 56 769 Bl. The disadvantage of such an assembly is that a specific association of the seal and thus a firm fit of the seal on the cross member can only be achieved by a certain cross-sectional shape, but which, at the same time, leads to apretension of the sealing lips relative to the sealing face of the bearing bush, which is higher than possibly required.
It is the object of the invention to provide a sealing assembly wherein the sealing function and the clamping-in function of the seal can be determined independently-of one another.
In accordance with the invention, the objective is achieved in that the first portion of the seal comprises an annular recess, that the annular recess starts from the end face of the first portion, said end face facing away from the open end face of the bearing bush, and extends along at least part of the length of said first portion, and that the annular recess divides the first portion of the seal, with 218g927 reference to the arm axis, into a radially outer annular sealing portion with at least one sealing lip intended to rest against the sealing face of the bearing bush and, with reference to the arm axis, into a radially inner annular fixing portion which is intended to be fixed to the seat face of the arm.
The advantage of this embodiment is that the fixing portion, in respect of material thickness, bore shape and pretension can be designed in such a way that a firm fit on the arm is ensured. Equally, the sealing portion can be designed in such a way that the pretension has the required value only in order to counteract any increased wear of the sealing lips and to ensure good sealing characteristics over a long period.
A further advantage of firmly associating the seal with the arm is that the sealing lips are subject to less wear when sealing the bearing bush because normally, bearing bushes are produced by non-chip producing forming operations, the surfaces thus being smoother than in the case of chip-forming operations which are normally applied to the outer surfaces of the arms.
In a preferred embodiment, the second portion serving as a kind of preseal is also associated with a sealing lip which rests on the outer face of the bearing bush with pretension. In this way it is possible to achieve a labyrinth seal which ensures that from the outside it is not possible for any dirt or moisture to enter the region of the bearing bush in which the needles are arranged.
Furthermore, the sealing lips resting against the sealing face provided in the bearing bush are protected from external influences. To be able to easily accommodate also axial forces which, for example, are exerted by the bearing " ' 218~92~
_ 3 needles on to the seal around the intermediate slide-on disc, the second portion of the seal, towards the rotational axis of the cross member, is supported on a shoulder of the associated arm.
To provide even better fixing conditions between the journal and seal, i.e. to achieve a non-rotating connection, it is proposed according to a further embodiment that the shoulder comprises recesses distributed around the arm axis and that the seal comprises formed-on projections intended to engage the recesses. A particularly advantageous embodiment of the sealing lip is obtained if the cross-section of same has the shape of a triangle whose point is intended to rest against the respective opposite face.
To be able to relubricate the assembly provided, it is necessary for the old lubricant to be able to escape when pressing in the new lubricant. Otherwise the seal would be damaged. It is therefore proposed that the fixing portion, in its bore by means of which it is positioned on the seat face of the arm, is provided with at least one channel extending parallel to the arm axis.
Said channel ends in the free environment and is preferably closed by a closing element, for example in the form of a lip or flap or lobe which rests against the outer face of the cross member and which is formed on to the seal.
In addition, it is proposed that the channel is associated with a closing element which opens when a certain lubrication pressure is exceeded. In this way it is ensured that the lubricant cannot escape unintentionally and that, furthermore, dirt cannot enter from the outside.
In a preferred embodiment, the seal is provided in the form of an injection-moulded part, with a thermoplastic 21899~7 _ 4 polyester (PBTP) having been found to be a particularly suitable material.
A preferred embodiment of the invention is diagrammatically illustrated in the drawing wherein Fig. 1 is a side elevation of a universal joint in the aligned position.
Fig. 2 is a section II-II according to Figure 1, but only through a yoke arm of a joint yoke.
Fig. 3 shows a detail Z according to Figure 2 in accordance with the seal design in an enlarged scale.
Fig. 4 is a section comparable to Figure 3, but through a region provided with recesses which are engaged by the seal projections.
Figure 1 shows the universal joint 1 with the two joint yokes 2, 3 which each comprise two yoke arms and which are connected to one another by a cross member 4 with four arms 5 which are arranged at right angles relative to one another in one plane. In the aligned condition, the two joint yokes 2, 3 are rotatable around the rotational axis 13, with the cross member 4 also rotating around said axis.
As can be seen in Figure 2, the outer face 6 of the arm 5 contains needles 7 arranged in the form of a rim around the arm 5. They are radially supported on the wall of the bearing bore 9 of the bearing bush 8. The bearing bush 8, in turn, is arranged in the receiving bore 10 of the yoke arm of the joint yoke 2 and secured therein against any radial displacement by a securing ring 11 which rests against the base of the bearing bush 8. Towards the open end 12 of the bearing bush 8, in the annular space between the arm 5 and the bearing bush 8, there is arranged a seal 16 on the seat face 15 of the arm 5 with a firm fit.
- 2l8g927 The seal 16 will be explained below in greater detail with reference to Figures 3 and 4. The seal 16 is an injection-moulded part consisting of a thermoplastic polyester comprising a first portion 17 which is divided S into two portions. Starting from the end face 27, there is provided an annular recess 21 which substantially extends along the length of the first portion 17, thus dividing same into two annular portions of which the radially outer annular portion forms the sealing portion 18 on whose outer face there are attached continuous sealing lips 19 comprising cross-sections in the form of triangles whose points rest against the sealing face 20 of the bearing bush 8 with pretension. On the radial inside, the annular fixing portion 22 is formed by the annular recess 21; by means of its bore 23, it is received on the seat face 15 of the arm 5 in a friction-locking way, with the radial thickness of the fixing portion being such as to ensure a firm fit.
Furthermore, there is provided a channel 24 which starts from the bore, which extends along same and continues as far as the free environment, i.e. it extends into the second portion 28 of the seal 16 and is sealed towards the outside by a closing element in the form of tab 25 resting on the outer face of the cross member 4. A disc 26 against which the needles 7 may abut rests against the end face 27. The disc 26 defines a gap permitting lubricant to move to the channel 24. The second portion 28 of the seal 16 is supported on a curved shoulder 31 of the extension of the arm S towards the cross member, i.e. in the direction of the rotational axis. It is guided outwardly in such a way that a further wall portion extends approximately parallel to the wall of the bearing bush 8 while embracing same from the open end face 12 and resting on the outer face 29 of the bearing bush 8 by means of the sealing lip 30 with pretension. In addition, as can be seen particularly clearly in Figure 4, the shoulder 31 is provided with - ~... . 2l89927 recesses 32 which are circumferentially distributed around the rotational axis 14 and which are engaged by projections 33 formed on to the second portion 28 of the seal 16, thus achieving a particularly firm connection.
Sealing assembly for a cross member List of reference numbers 1 universal joint 2,3 joint yoke 4 cross member arm 6 outer face of arm 7 needles 8 bearing bush 9 bearing bore 10 receiving bore 11 securing ring 12 open end face 13 rotational axis 14 arm axis 15 seat face 16 seal 17 first portion 18 sealing portion 19 sealing lip 20 sealing face 21 annular recess 22 fixing portion 23 bore 24 channel 25 locking element 26 disc 27 end face 28 second portion 29 outer face 30 sealing lip 31 shoulder 32 recess 33 projection
Description It is the object of the invention to provide a sealing assembly for the rotatable support of the arms of a cross member of a universal joint around the associated arm axis, having a seal comprising a first portion which is arranged in the annular space between a seat face for the first portion and a sealing face provided on the inner face of a bearing bush supporting an arm and which firmly rests on the seat face, and further comprising a second portion which, starting from the first portion, embraces the edge of the open end face of the bearing bush and, for sealing purposes, rests against the outer face of the bearing bush.
Such a sealing assembly is described in DE 25 56 769 Bl. The disadvantage of such an assembly is that a specific association of the seal and thus a firm fit of the seal on the cross member can only be achieved by a certain cross-sectional shape, but which, at the same time, leads to apretension of the sealing lips relative to the sealing face of the bearing bush, which is higher than possibly required.
It is the object of the invention to provide a sealing assembly wherein the sealing function and the clamping-in function of the seal can be determined independently-of one another.
In accordance with the invention, the objective is achieved in that the first portion of the seal comprises an annular recess, that the annular recess starts from the end face of the first portion, said end face facing away from the open end face of the bearing bush, and extends along at least part of the length of said first portion, and that the annular recess divides the first portion of the seal, with 218g927 reference to the arm axis, into a radially outer annular sealing portion with at least one sealing lip intended to rest against the sealing face of the bearing bush and, with reference to the arm axis, into a radially inner annular fixing portion which is intended to be fixed to the seat face of the arm.
The advantage of this embodiment is that the fixing portion, in respect of material thickness, bore shape and pretension can be designed in such a way that a firm fit on the arm is ensured. Equally, the sealing portion can be designed in such a way that the pretension has the required value only in order to counteract any increased wear of the sealing lips and to ensure good sealing characteristics over a long period.
A further advantage of firmly associating the seal with the arm is that the sealing lips are subject to less wear when sealing the bearing bush because normally, bearing bushes are produced by non-chip producing forming operations, the surfaces thus being smoother than in the case of chip-forming operations which are normally applied to the outer surfaces of the arms.
In a preferred embodiment, the second portion serving as a kind of preseal is also associated with a sealing lip which rests on the outer face of the bearing bush with pretension. In this way it is possible to achieve a labyrinth seal which ensures that from the outside it is not possible for any dirt or moisture to enter the region of the bearing bush in which the needles are arranged.
Furthermore, the sealing lips resting against the sealing face provided in the bearing bush are protected from external influences. To be able to easily accommodate also axial forces which, for example, are exerted by the bearing " ' 218~92~
_ 3 needles on to the seal around the intermediate slide-on disc, the second portion of the seal, towards the rotational axis of the cross member, is supported on a shoulder of the associated arm.
To provide even better fixing conditions between the journal and seal, i.e. to achieve a non-rotating connection, it is proposed according to a further embodiment that the shoulder comprises recesses distributed around the arm axis and that the seal comprises formed-on projections intended to engage the recesses. A particularly advantageous embodiment of the sealing lip is obtained if the cross-section of same has the shape of a triangle whose point is intended to rest against the respective opposite face.
To be able to relubricate the assembly provided, it is necessary for the old lubricant to be able to escape when pressing in the new lubricant. Otherwise the seal would be damaged. It is therefore proposed that the fixing portion, in its bore by means of which it is positioned on the seat face of the arm, is provided with at least one channel extending parallel to the arm axis.
Said channel ends in the free environment and is preferably closed by a closing element, for example in the form of a lip or flap or lobe which rests against the outer face of the cross member and which is formed on to the seal.
In addition, it is proposed that the channel is associated with a closing element which opens when a certain lubrication pressure is exceeded. In this way it is ensured that the lubricant cannot escape unintentionally and that, furthermore, dirt cannot enter from the outside.
In a preferred embodiment, the seal is provided in the form of an injection-moulded part, with a thermoplastic 21899~7 _ 4 polyester (PBTP) having been found to be a particularly suitable material.
A preferred embodiment of the invention is diagrammatically illustrated in the drawing wherein Fig. 1 is a side elevation of a universal joint in the aligned position.
Fig. 2 is a section II-II according to Figure 1, but only through a yoke arm of a joint yoke.
Fig. 3 shows a detail Z according to Figure 2 in accordance with the seal design in an enlarged scale.
Fig. 4 is a section comparable to Figure 3, but through a region provided with recesses which are engaged by the seal projections.
Figure 1 shows the universal joint 1 with the two joint yokes 2, 3 which each comprise two yoke arms and which are connected to one another by a cross member 4 with four arms 5 which are arranged at right angles relative to one another in one plane. In the aligned condition, the two joint yokes 2, 3 are rotatable around the rotational axis 13, with the cross member 4 also rotating around said axis.
As can be seen in Figure 2, the outer face 6 of the arm 5 contains needles 7 arranged in the form of a rim around the arm 5. They are radially supported on the wall of the bearing bore 9 of the bearing bush 8. The bearing bush 8, in turn, is arranged in the receiving bore 10 of the yoke arm of the joint yoke 2 and secured therein against any radial displacement by a securing ring 11 which rests against the base of the bearing bush 8. Towards the open end 12 of the bearing bush 8, in the annular space between the arm 5 and the bearing bush 8, there is arranged a seal 16 on the seat face 15 of the arm 5 with a firm fit.
- 2l8g927 The seal 16 will be explained below in greater detail with reference to Figures 3 and 4. The seal 16 is an injection-moulded part consisting of a thermoplastic polyester comprising a first portion 17 which is divided S into two portions. Starting from the end face 27, there is provided an annular recess 21 which substantially extends along the length of the first portion 17, thus dividing same into two annular portions of which the radially outer annular portion forms the sealing portion 18 on whose outer face there are attached continuous sealing lips 19 comprising cross-sections in the form of triangles whose points rest against the sealing face 20 of the bearing bush 8 with pretension. On the radial inside, the annular fixing portion 22 is formed by the annular recess 21; by means of its bore 23, it is received on the seat face 15 of the arm 5 in a friction-locking way, with the radial thickness of the fixing portion being such as to ensure a firm fit.
Furthermore, there is provided a channel 24 which starts from the bore, which extends along same and continues as far as the free environment, i.e. it extends into the second portion 28 of the seal 16 and is sealed towards the outside by a closing element in the form of tab 25 resting on the outer face of the cross member 4. A disc 26 against which the needles 7 may abut rests against the end face 27. The disc 26 defines a gap permitting lubricant to move to the channel 24. The second portion 28 of the seal 16 is supported on a curved shoulder 31 of the extension of the arm S towards the cross member, i.e. in the direction of the rotational axis. It is guided outwardly in such a way that a further wall portion extends approximately parallel to the wall of the bearing bush 8 while embracing same from the open end face 12 and resting on the outer face 29 of the bearing bush 8 by means of the sealing lip 30 with pretension. In addition, as can be seen particularly clearly in Figure 4, the shoulder 31 is provided with - ~... . 2l89927 recesses 32 which are circumferentially distributed around the rotational axis 14 and which are engaged by projections 33 formed on to the second portion 28 of the seal 16, thus achieving a particularly firm connection.
Sealing assembly for a cross member List of reference numbers 1 universal joint 2,3 joint yoke 4 cross member arm 6 outer face of arm 7 needles 8 bearing bush 9 bearing bore 10 receiving bore 11 securing ring 12 open end face 13 rotational axis 14 arm axis 15 seat face 16 seal 17 first portion 18 sealing portion 19 sealing lip 20 sealing face 21 annular recess 22 fixing portion 23 bore 24 channel 25 locking element 26 disc 27 end face 28 second portion 29 outer face 30 sealing lip 31 shoulder 32 recess 33 projection
Claims (8)
1. A sealing assembly for the rotatable support of the arms (5) of a cross member (4) of a universal joint (1) around the associated arm axis (14), having a seal (16) comprising a first portion (17) which is arranged in the annular space between a seat face (15) for the first portion (17) and a sealing face (20) provided on the inner face of a bearing bush (8) supporting an arm (5) and which firmly rests on the seat face (15), and further comprising a second portion (28) which, starting from the first portion (17), embraces the edge of the open end face (12) of the bearing bush (8) and, for sealing purposes, rests against the outer face (29) of the bearing bush (8), characterised in that the first portion (17) of the seal (16) comprises an annular recess (21), that the annular recess (21) starts from the end face (27) of the first portion (17), said end face (27) facing away from the open end face (12) of the bearing bush (8), and extends along at least part of the length of said first portion (17), and that the annular recess (21) divides the first portion (17) of the seal (16), with reference to the arm axis (14), into a radially outer annular sealing portion (18) with at least one sealing lip (19) intended to rest against the sealing face (20) of the bearing bush (8) and, with reference to the arm axis (14), into a radially inner annular fixing portion (22) which is intended to be fixed to the seat face (15) of the arm (5).
2. A sealing assembly according to Claim 1, characterised in that the second portion (28) of the seal (16) comprises at least one sealing lip (30) which projects from its inner face inwardly towards the arm axis (14) and which, for sealing purposes, rests on the outer face (29) of the bearing bush (8) with pretension.
3. A sealing assembly according to any one of Claims 1 or 2, characterised in that, towards the rotational axis (14) of the cross member (4), the second portion (28) of the seal (16) is supported on a shoulder (31) of the associated arm (5).
4. A sealing assembly according to claim 3, characterised in that the shoulder (31) comprises recesses (32) distributed around the arm axis (14) and that the seal (16) comprises formed-on projections (33) intended to engage the recesses (32).
5. A sealing assembly according to any one of Claims 1 or 2, characterised in that the cross-section of the sealing lips (19, 30) has the shape of a triangle whose point is intended to rest against the respective opposite face.
6. A sealing assembly according to Claim 1, characterised in that the fixing portion (22), in its bore (23) by means of which it is positioned on the seat face (15) of the arm (5), is provided with at least one channel (24) extending parallel to the arm axis (14).
7. A sealing assembly according to Claim 6, characterised in that the channel (24) is associated with a closing element (25) which opens when a certain lubrication pressure is exceeded.
8. A sealing assembly according to any one of Claims 1 to 7, characterised in that the seal (16) is an injection-moulded part consisting of a thermoplastic polyester (BPTP).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19542100A DE19542100C1 (en) | 1995-11-11 | 1995-11-11 | Sealing arrangement for a trunnion cross |
| DE19542100.0 | 1995-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2189927A1 true CA2189927A1 (en) | 1997-05-12 |
Family
ID=7777227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002189927A Abandoned CA2189927A1 (en) | 1995-11-11 | 1996-11-08 | Sealing assembly for a cross member |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0773379A1 (en) |
| CA (1) | CA2189927A1 (en) |
| DE (1) | DE19542100C1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465204A (en) * | 2014-09-30 | 2016-04-06 | 斯凯孚公司 | Universal joint |
| CN111594544A (en) * | 2019-02-21 | 2020-08-28 | 赛峰起落架***英国有限公司 | Bearing arrangement |
| CN112923059A (en) * | 2021-02-02 | 2021-06-08 | 重庆创鸿机电有限公司 | Combined sealing structure and automobile steering knuckle bearing sealing structure |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20307396U1 (en) | 2003-05-13 | 2003-07-24 | Skf Ab | Sealing arrangement for sealing a gap between a bearing bush and a pin |
| DE10335872A1 (en) * | 2003-08-06 | 2005-03-10 | Voith Turbo Kg | Sealing arrangement and universal joint arrangement |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8416023U1 (en) * | 1984-08-23 | FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt | Seal made of elastic material for joint sleeves | |
| DE2556769B1 (en) * | 1975-12-17 | 1976-12-23 | Loehr & Bromkamp Gmbh | SEAL FOR SEALING A UNIVERSAL JOINT |
| DE2718503A1 (en) * | 1977-04-26 | 1978-11-02 | Schaeffler Ohg Industriewerk | SEALED UNIVERSAL JOINT BUSH |
| DE2908713C2 (en) * | 1979-03-06 | 1985-04-18 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | Seal for bearing bushes |
| US4611932A (en) * | 1983-12-17 | 1986-09-16 | Skf Kugellagerfabriken Gmbh | Bearing bushing for universal joints |
| DE3639315C1 (en) * | 1986-11-17 | 1988-04-14 | Gelenkwellenbau Gmbh | Device for sealing a roller bearing, in particular bearing bushes of a universal joint |
| DE8714948U1 (de) * | 1987-11-10 | 1987-12-17 | SKF GmbH, 8720 Schweinfurt | Abdichtung für Lagerbüchsen |
| US4936811A (en) * | 1989-03-20 | 1990-06-26 | Wynn's-Precision, Inc. | Boot assembly for constant velocity joint |
| DE4211757A1 (en) * | 1992-04-08 | 1993-10-21 | Walterscheid Gmbh Jean | Sealing arrangement for a universal joint |
| US5295914A (en) * | 1992-09-30 | 1994-03-22 | General Motors Corporation | Thermoplastic elastomer seal boot |
| DE4234614C2 (en) * | 1992-10-14 | 1994-08-04 | Walterscheid Gmbh Gkn | Sealing arrangement for a universal joint |
-
1995
- 1995-11-11 DE DE19542100A patent/DE19542100C1/en not_active Expired - Fee Related
-
1996
- 1996-10-24 EP EP96117034A patent/EP0773379A1/en not_active Ceased
- 1996-11-08 CA CA002189927A patent/CA2189927A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465204A (en) * | 2014-09-30 | 2016-04-06 | 斯凯孚公司 | Universal joint |
| US10400827B2 (en) | 2014-09-30 | 2019-09-03 | Aktiebolaget Skf | Universal joint |
| CN105465204B (en) * | 2014-09-30 | 2021-05-04 | 斯凯孚公司 | Universal joint |
| CN111594544A (en) * | 2019-02-21 | 2020-08-28 | 赛峰起落架***英国有限公司 | Bearing arrangement |
| CN112923059A (en) * | 2021-02-02 | 2021-06-08 | 重庆创鸿机电有限公司 | Combined sealing structure and automobile steering knuckle bearing sealing structure |
| CN112923059B (en) * | 2021-02-02 | 2023-10-27 | 重庆创鸿机电有限公司 | Combined sealing structure and automobile steering knuckle bearing sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19542100C1 (en) | 1997-06-12 |
| EP0773379A1 (en) | 1997-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 19991108 |