CA1281925C - Wheel nut for fastening commercial vehicle wheels - Google Patents
Wheel nut for fastening commercial vehicle wheelsInfo
- Publication number
- CA1281925C CA1281925C CA000480527A CA480527A CA1281925C CA 1281925 C CA1281925 C CA 1281925C CA 000480527 A CA000480527 A CA 000480527A CA 480527 A CA480527 A CA 480527A CA 1281925 C CA1281925 C CA 1281925C
- Authority
- CA
- Canada
- Prior art keywords
- pressure plate
- wheel
- nut
- nut body
- neck segment
- 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.)
- Expired - Lifetime
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- Connection Of Plates (AREA)
Abstract
Abstract A wheel nut for fastening vehicle wheels onto the wheel hub (42) consists of a nut body (2) with a head segment (4) and a neck segment (6) coaxial to this on which a pressure plate (8) is seated unlosably and rotatably. The neck segment (6) protrudes beyond the contact surface of the pressure plate and carries an internal thread (22) in such a way that it includes threads of the bolt (44) which are still located inside the through hole (48,54) of the wheel disk (46,52) and thus is usable even when there is only a short projecting length of the bolt, because of a large material thickness of light metal wheels. The neck segment (6) projecting into the through hole (48,54) can also serve for bolt centering of the wheel in interaction with the through hole (48,54).
Description
llB5 WHE~L N~JT FOR FASTENING
COMMERCIAL VEHICLE WHEELS
Technical Field The invention relates to a wheel nut of the type used to fasten wheels to the hub flanqes of commercial vehicles.
Backqround of the Invention -Apart from a few special fastening systems for special cases, the wheels generally have a plurality of through holes distributed concentrically around the wheel axis, with which they are mounted on threaded bolts arranged on the hub flange. Wheel nuts are screwed onto the ends of the bolts penetrating through the through holes. Thus, two centering systems are differentiated, namely bolt centering and hub centering.
With bolt centering, which was predominant earlier, the mutual arrangement of bolts and through holes with respect to each other is very accurate;
besides this the diameter of the through holes is closely matched to the diameter of the bolts. The centering proper is generally done with hemispherical indentations surrounding the through holes which either interact with the complementary contact surfaces formed .
, ! ' 3~5 on the wheel nuts or require additional spherically shaped spring rings for the use of flat collar nuts (form-fit interlocking).
For hub centering, the centering is done by means of a central hole formed in the wheel disk and a central hub pin. The through holes and the bolts have a larger tolerance as regards their mutual arrangement, by reason of a simpler mounting of the wheel, and their diameter, i.e. the diameter of the throuyh holes here is 1~ distinctly larger than that of the bolts. The fastening is done by means of wheel nuts with pressure plates having a contact surface lying planar on the wheel disk.
In order to make possible a trouble-free fastening of this kind of hub-centered wheels which 1~ compensates for run-out deviations between the contact surface and the nut thread and ensures a uniform coefficient of friction in tightening the wheel nuts, a wheel nut of the type of the species has already been developed in which the tightening force of the nut proper is transmitted to the wheel disk by way of a pressure plate (German Vtility Patent No. 72 10 833).
For this the neck section basically has only suah a length that it can receive the pressure plate. After the mounting of the pressure plate, the neck segment is S~H-073 - 3 - 7B5 flanged at its end so that the pressure plate is retained unlosably but rotatably on the neck segment. A
thread is formed only in the head segment.
The known wheel nut on the one hand is suitable only for hub-centered steel wheels, since it itself has no kind of centering. On the other hand it is also usable only for a certain minimum length of the bolts in which the thread segment protruding out of the through hole has a sufficient number of threads for the transmission of force from the wheel nut to the boltsO
When, for example, the bolt is planned for the mounting of a steel wheel, then the mounting of an aluminum wheel, in which the material thickness is substantially larger for reasons of strength, is not possible, since then only a comparatively small number of threads is engaged by the wheel nut.
For the above-mentioned reasons it is necessary even in the mounting of the hubs and particularly in the choice of the bolt lengths to ~ ascertain which type of wheels, for example, simple steel wheels or the double wheels which are customary for rear wheels of trucks, or light metal wheels, are to be mounted; besides this the manufacturer's plant and the workshops must have di~ferent wheel bolts in reserve which are intended particularly or the ~wo possible centering systems but also for different wheel disks.
With a view to providing a wheel nut which is suitable for mounting different types of wheels, whekher with hub centering or bolt centering, with little or no modification required, there is providing according to one embodiment of th~ invention a wheel nut for fastening a wheel to hub flange of a vehicle, comprising: a nut body having an upper head segment and lower neck segment coaxial with ~he head segment, the nut body defining a bore centrally through it, the bore having an internal thread extending through the head segment downwardly into the neck segment; an annular pressure plate about the neck segment of the nut body; and first and second retaining means operable to hold the pressure plate rotatable about the nut body. The first retaining means comprises a collar about t~e nut body defining a surface which coacts with an upper opposing surface of the pressure plate to limit the upward travel of the pres~ure plate along the nut body. The second retaining means comprises at least one projection on the neck segment extending upwardly and outwardly, defining an outer ramp and an upper surface extending axially away from the neck segment, and a downwardly and inwardly declining proiection about the inner surface of the pressure plate defining an innsr ramp and a lower surface extending axially inwardl~ of the pressure plate. Said outer and inner ramps coact to enable the pressure plate to be snap-fitted over the neck segment, and said upper and lower surfaces coact to limit the travel of the pressure plate downwardly along ~he nut body.
Advantageously, the projection on the neck segment is in the form of a shoulder w~ich surround the neck segment and projects outwardly and upwardly, the outer diameter of the shoulder ~eing larger than the inner diameter o~ the projection about the inner surface of the pressure plate, and the nut body or the pressure plate possesses elastic properties which permit the snap-joinin~
of the pressure plate about the nut body. The means for forming a snap joint between the pressure plate and the neck segm~nt of the nut body is particularly simple in construction when the retaining means are in the form ramp-like shoulders arranged on the outside of the neck segment and the inside of ~ke pressure plate. Apart from its simplicity of construction, such a snap joint dispenses with an additional working step after the joininy together of the two parts of the wheel nut.
The opposite faces of the collar for~ed on the nut body and of the pressure plate throuyh which the tightening force of the nut body is transmitted to the pressure plate may be made in conical form in an intrinsically known manner with a cone angle ~ of between and 30 ; however they also may have another shape, for example, the shape of annular surfaces forming approximately a right angle to the axis of the nut body or that of spherically curved surfaces complementary to each other. In order to ensure that when the wheel nut is tightened it is not the pressure plate which rotat2s against the wheel disk but rather the nut body which rotates against the pressure plate, in a further development of the invention the above-mentioned force-transmitting surfaces are coated with a corrosion-resistant material with a low coefficient of friction.
A number of embodiment examples of the invention are represented in the drawings and described in the following:
G
Brief Description of the Drawinqs FIGURE 1 shows a sida view of a wheel nut wherein the right part is represented in a longitudinal section;
FIGURE 2 in an enlarged representation shows a segment of FIGURE l;
FIGURES 3 and 4 respectively show reprasenta-tions of different embodiments according to FIGURE 2;
FIGURE 5 shows a wheel nut according to FIGURE
1 in the mounted state in combination with a hub-centered steel wheel; and FIGURE 6 shows a wheel nut according to FIGURE
1 in the mounted state interacting with a bolt-centered light metal wheel.
Detailed Description of the Pre~erred Embodiment The wheel nut represented in FIGURE 1 consists essentially of a wheel body 2 with a head segment 4 and a neck segment 6 coaxial to this, on which an annular pressure plate 8 is arranged rotatably and unlosably, that is, retained about the neck segment 6 and being rotatable relative to the neck segment 6. The nut body 12 has key working surfaces 10 and is penetrated inward by a threaded hole 12. The pressure plate 8 is retained in the direction of the head segment . . . . . . . . . .
SCH-073 - ~Y- 7~5 4 by a collar 14, and in the opposite direction by a retaining projection 16 formed on the outer surface of the neck segment 6 and by a counter-projection 18 formed on the inner face of the pressure plate 8, which catch behind each other in the manner of a snap fastener. As can be seen from FIGURE 1, the neck segrnent 6 protrudes out over the contact surface 20 intended for the contact of the pressure plate 8 against the wheel disk, not represented in FIGURE l; the internal thread 22 formed in the threaded hole 12 extends into the neck segment 6.
As FIGURE 2 in particular shows, the retaining projection 16 and the counter-projection 18 are respectively made in the form of shoulders projecting somewhat in the manner of a ramp. Their shaping is chosen with consideration given to the material used *or the nut body and the pressure plate in such a way that when the pressure plate 8 is pushed onto the necX
segment 6 they catch behind each other in the manner of an elastic snap fastener.
The surfaces 24 and 26, turned opposite each other, of the collar 14 and the pressure plat~ 8 respectively are made conical in shape in the embodiment example according to FIGIJRES 1 and 2 with a cone an~le ~ of about 5 to 30, preferably 15~. When the wheel nuts are tightened, this cone angle brings about an La3~ ~j SCH-073 -J~ - 7B5 automatic centering of the pressure plate 8 on the nut body 2.
FIGURE 3 shows a representation according to FIGllRE 2; both embodiment examples are aliXe in their essential structure and so corresponding parts are provided with the same reerence numbers. The ~aces 28 and 30, turned toward each other, of the collar 14 and the pressure plate 8 respectively, are merely shown as annular faces standing perpendicularly to the nut axis, in contrast to the embodiment example according to FIGURE 2. With a sufficiently narrow tolerance between the outer diameter of the retaining projection 16 and the inner diameter of the counter-projection 18, a satisfactory centering of the two component parts with one another is ensured. In order to ensure that when the wheel nut is tightened there is a sliding motion only between the nut body 2 and the pressure plate 8 and not between the latter and the wheel disk, the surface 28 is provided with a coating 32 which consists of a ~ pressure-resistant and corrosion-resistant material with a low coefficient of friction. Instead of or in addition to the surface 28, the surface 30 too can be provided with a coating of this type.
9~
FIGURE 4 shows a further embodiment example which in turn differs from the embodiment e~amples of FIGURES 2 and 3 only in the shaping of the surfaces 34 and 36, respectively, of the collar 14 and the pressure plate 8 turned toward one another. In the embodiment example represented, these surfaces are spherically curved complementarily to each other. This shaping makes possible in a particularly favorable way a compensation for run-out deviations between the thread 22 and the contact surface 20. Moreover, in FIGURE 4, too the parts corresponding to the embodiment example according to FIGURE 2 are provided with the same reference numbers.
FIGURE 5 shows the wheel nut according to FIGUR~ 1 in the mounted state. A wheel hub 38 consists of a central hub pin 40 and a hub flange 42 which carries a plurality of wheel bolts 44 arranged concentrically to the wheel axis. A wheel disk 46 is placed on the wheel hub 38, where the wheel bolts 44 respectively grip through the through holes 48 formed in the wheel disk. A wheel nut is screwed onto each wheel bolt 44, whereby the tightenlng force of the nut body 2 is transmitted to the wheel disk 46 by way of the pressure plate 8. The wheel is hub-centered, i.e. the wheel disk 46 with a central hole lies closely against 8~
1~
SCH-073 - ~ - 7B5 the hub pin 40. The through hole 48 has a diameter such -that it surrounds the neck seyment 6 of the nut body 2 with a clearance, so that the wheel nuts exert no centering action on the wheel disk 46. I~ a wheel disk with a substantially smaller material thickness is used instead of the wheel disk 46, then the neck segment 6 can be shortened, as is denoted by the broken lines 50.
In FIGURE 6 a wheel disk 52 with a substantially greater material thickness, for example, a light metal wheel, is mounted on a wheel hub 38 which in its dimensions accurately corresponds to the wheel hub represented in FIGURE 5~ The internal thread 22 which is prolonged into the neck segment 6, despite the relatively small pro]ecting length of the bolt, still includes a sufficient number of threads so that a secure fastening is ensured. The wheel disk 52 is bolt-centered, i.e. its central hole surrounds a hub pin 4~
with a clearance, The outer side 56 is made as an accurately machined centering surface interacting with the inner surface of the through hole 54.
As FIGURES 1, 5 and 6 show, the free end of the neck segment 6 turned away from the head segment is respectively conically beveled in order to facilitate Jl SCH~073 - ~ - 7B5 the insertion of the neck segment 6 into the through hole 48 or 54.
:
: ~ :
COMMERCIAL VEHICLE WHEELS
Technical Field The invention relates to a wheel nut of the type used to fasten wheels to the hub flanqes of commercial vehicles.
Backqround of the Invention -Apart from a few special fastening systems for special cases, the wheels generally have a plurality of through holes distributed concentrically around the wheel axis, with which they are mounted on threaded bolts arranged on the hub flange. Wheel nuts are screwed onto the ends of the bolts penetrating through the through holes. Thus, two centering systems are differentiated, namely bolt centering and hub centering.
With bolt centering, which was predominant earlier, the mutual arrangement of bolts and through holes with respect to each other is very accurate;
besides this the diameter of the through holes is closely matched to the diameter of the bolts. The centering proper is generally done with hemispherical indentations surrounding the through holes which either interact with the complementary contact surfaces formed .
, ! ' 3~5 on the wheel nuts or require additional spherically shaped spring rings for the use of flat collar nuts (form-fit interlocking).
For hub centering, the centering is done by means of a central hole formed in the wheel disk and a central hub pin. The through holes and the bolts have a larger tolerance as regards their mutual arrangement, by reason of a simpler mounting of the wheel, and their diameter, i.e. the diameter of the throuyh holes here is 1~ distinctly larger than that of the bolts. The fastening is done by means of wheel nuts with pressure plates having a contact surface lying planar on the wheel disk.
In order to make possible a trouble-free fastening of this kind of hub-centered wheels which 1~ compensates for run-out deviations between the contact surface and the nut thread and ensures a uniform coefficient of friction in tightening the wheel nuts, a wheel nut of the type of the species has already been developed in which the tightening force of the nut proper is transmitted to the wheel disk by way of a pressure plate (German Vtility Patent No. 72 10 833).
For this the neck section basically has only suah a length that it can receive the pressure plate. After the mounting of the pressure plate, the neck segment is S~H-073 - 3 - 7B5 flanged at its end so that the pressure plate is retained unlosably but rotatably on the neck segment. A
thread is formed only in the head segment.
The known wheel nut on the one hand is suitable only for hub-centered steel wheels, since it itself has no kind of centering. On the other hand it is also usable only for a certain minimum length of the bolts in which the thread segment protruding out of the through hole has a sufficient number of threads for the transmission of force from the wheel nut to the boltsO
When, for example, the bolt is planned for the mounting of a steel wheel, then the mounting of an aluminum wheel, in which the material thickness is substantially larger for reasons of strength, is not possible, since then only a comparatively small number of threads is engaged by the wheel nut.
For the above-mentioned reasons it is necessary even in the mounting of the hubs and particularly in the choice of the bolt lengths to ~ ascertain which type of wheels, for example, simple steel wheels or the double wheels which are customary for rear wheels of trucks, or light metal wheels, are to be mounted; besides this the manufacturer's plant and the workshops must have di~ferent wheel bolts in reserve which are intended particularly or the ~wo possible centering systems but also for different wheel disks.
With a view to providing a wheel nut which is suitable for mounting different types of wheels, whekher with hub centering or bolt centering, with little or no modification required, there is providing according to one embodiment of th~ invention a wheel nut for fastening a wheel to hub flange of a vehicle, comprising: a nut body having an upper head segment and lower neck segment coaxial with ~he head segment, the nut body defining a bore centrally through it, the bore having an internal thread extending through the head segment downwardly into the neck segment; an annular pressure plate about the neck segment of the nut body; and first and second retaining means operable to hold the pressure plate rotatable about the nut body. The first retaining means comprises a collar about t~e nut body defining a surface which coacts with an upper opposing surface of the pressure plate to limit the upward travel of the pres~ure plate along the nut body. The second retaining means comprises at least one projection on the neck segment extending upwardly and outwardly, defining an outer ramp and an upper surface extending axially away from the neck segment, and a downwardly and inwardly declining proiection about the inner surface of the pressure plate defining an innsr ramp and a lower surface extending axially inwardl~ of the pressure plate. Said outer and inner ramps coact to enable the pressure plate to be snap-fitted over the neck segment, and said upper and lower surfaces coact to limit the travel of the pressure plate downwardly along ~he nut body.
Advantageously, the projection on the neck segment is in the form of a shoulder w~ich surround the neck segment and projects outwardly and upwardly, the outer diameter of the shoulder ~eing larger than the inner diameter o~ the projection about the inner surface of the pressure plate, and the nut body or the pressure plate possesses elastic properties which permit the snap-joinin~
of the pressure plate about the nut body. The means for forming a snap joint between the pressure plate and the neck segm~nt of the nut body is particularly simple in construction when the retaining means are in the form ramp-like shoulders arranged on the outside of the neck segment and the inside of ~ke pressure plate. Apart from its simplicity of construction, such a snap joint dispenses with an additional working step after the joininy together of the two parts of the wheel nut.
The opposite faces of the collar for~ed on the nut body and of the pressure plate throuyh which the tightening force of the nut body is transmitted to the pressure plate may be made in conical form in an intrinsically known manner with a cone angle ~ of between and 30 ; however they also may have another shape, for example, the shape of annular surfaces forming approximately a right angle to the axis of the nut body or that of spherically curved surfaces complementary to each other. In order to ensure that when the wheel nut is tightened it is not the pressure plate which rotat2s against the wheel disk but rather the nut body which rotates against the pressure plate, in a further development of the invention the above-mentioned force-transmitting surfaces are coated with a corrosion-resistant material with a low coefficient of friction.
A number of embodiment examples of the invention are represented in the drawings and described in the following:
G
Brief Description of the Drawinqs FIGURE 1 shows a sida view of a wheel nut wherein the right part is represented in a longitudinal section;
FIGURE 2 in an enlarged representation shows a segment of FIGURE l;
FIGURES 3 and 4 respectively show reprasenta-tions of different embodiments according to FIGURE 2;
FIGURE 5 shows a wheel nut according to FIGURE
1 in the mounted state in combination with a hub-centered steel wheel; and FIGURE 6 shows a wheel nut according to FIGURE
1 in the mounted state interacting with a bolt-centered light metal wheel.
Detailed Description of the Pre~erred Embodiment The wheel nut represented in FIGURE 1 consists essentially of a wheel body 2 with a head segment 4 and a neck segment 6 coaxial to this, on which an annular pressure plate 8 is arranged rotatably and unlosably, that is, retained about the neck segment 6 and being rotatable relative to the neck segment 6. The nut body 12 has key working surfaces 10 and is penetrated inward by a threaded hole 12. The pressure plate 8 is retained in the direction of the head segment . . . . . . . . . .
SCH-073 - ~Y- 7~5 4 by a collar 14, and in the opposite direction by a retaining projection 16 formed on the outer surface of the neck segment 6 and by a counter-projection 18 formed on the inner face of the pressure plate 8, which catch behind each other in the manner of a snap fastener. As can be seen from FIGURE 1, the neck segrnent 6 protrudes out over the contact surface 20 intended for the contact of the pressure plate 8 against the wheel disk, not represented in FIGURE l; the internal thread 22 formed in the threaded hole 12 extends into the neck segment 6.
As FIGURE 2 in particular shows, the retaining projection 16 and the counter-projection 18 are respectively made in the form of shoulders projecting somewhat in the manner of a ramp. Their shaping is chosen with consideration given to the material used *or the nut body and the pressure plate in such a way that when the pressure plate 8 is pushed onto the necX
segment 6 they catch behind each other in the manner of an elastic snap fastener.
The surfaces 24 and 26, turned opposite each other, of the collar 14 and the pressure plat~ 8 respectively are made conical in shape in the embodiment example according to FIGIJRES 1 and 2 with a cone an~le ~ of about 5 to 30, preferably 15~. When the wheel nuts are tightened, this cone angle brings about an La3~ ~j SCH-073 -J~ - 7B5 automatic centering of the pressure plate 8 on the nut body 2.
FIGURE 3 shows a representation according to FIGllRE 2; both embodiment examples are aliXe in their essential structure and so corresponding parts are provided with the same reerence numbers. The ~aces 28 and 30, turned toward each other, of the collar 14 and the pressure plate 8 respectively, are merely shown as annular faces standing perpendicularly to the nut axis, in contrast to the embodiment example according to FIGURE 2. With a sufficiently narrow tolerance between the outer diameter of the retaining projection 16 and the inner diameter of the counter-projection 18, a satisfactory centering of the two component parts with one another is ensured. In order to ensure that when the wheel nut is tightened there is a sliding motion only between the nut body 2 and the pressure plate 8 and not between the latter and the wheel disk, the surface 28 is provided with a coating 32 which consists of a ~ pressure-resistant and corrosion-resistant material with a low coefficient of friction. Instead of or in addition to the surface 28, the surface 30 too can be provided with a coating of this type.
9~
FIGURE 4 shows a further embodiment example which in turn differs from the embodiment e~amples of FIGURES 2 and 3 only in the shaping of the surfaces 34 and 36, respectively, of the collar 14 and the pressure plate 8 turned toward one another. In the embodiment example represented, these surfaces are spherically curved complementarily to each other. This shaping makes possible in a particularly favorable way a compensation for run-out deviations between the thread 22 and the contact surface 20. Moreover, in FIGURE 4, too the parts corresponding to the embodiment example according to FIGURE 2 are provided with the same reference numbers.
FIGURE 5 shows the wheel nut according to FIGUR~ 1 in the mounted state. A wheel hub 38 consists of a central hub pin 40 and a hub flange 42 which carries a plurality of wheel bolts 44 arranged concentrically to the wheel axis. A wheel disk 46 is placed on the wheel hub 38, where the wheel bolts 44 respectively grip through the through holes 48 formed in the wheel disk. A wheel nut is screwed onto each wheel bolt 44, whereby the tightenlng force of the nut body 2 is transmitted to the wheel disk 46 by way of the pressure plate 8. The wheel is hub-centered, i.e. the wheel disk 46 with a central hole lies closely against 8~
1~
SCH-073 - ~ - 7B5 the hub pin 40. The through hole 48 has a diameter such -that it surrounds the neck seyment 6 of the nut body 2 with a clearance, so that the wheel nuts exert no centering action on the wheel disk 46. I~ a wheel disk with a substantially smaller material thickness is used instead of the wheel disk 46, then the neck segment 6 can be shortened, as is denoted by the broken lines 50.
In FIGURE 6 a wheel disk 52 with a substantially greater material thickness, for example, a light metal wheel, is mounted on a wheel hub 38 which in its dimensions accurately corresponds to the wheel hub represented in FIGURE 5~ The internal thread 22 which is prolonged into the neck segment 6, despite the relatively small pro]ecting length of the bolt, still includes a sufficient number of threads so that a secure fastening is ensured. The wheel disk 52 is bolt-centered, i.e. its central hole surrounds a hub pin 4~
with a clearance, The outer side 56 is made as an accurately machined centering surface interacting with the inner surface of the through hole 54.
As FIGURES 1, 5 and 6 show, the free end of the neck segment 6 turned away from the head segment is respectively conically beveled in order to facilitate Jl SCH~073 - ~ - 7B5 the insertion of the neck segment 6 into the through hole 48 or 54.
:
: ~ :
Claims (9)
1. A wheel nut for fastening a wheel to a hub flange of a vehicle, comprising:
a nut body having an upper head segment and a lower neck segment being coaxial with the head segment, the nut body defining a bore centrally through it, the bore having an internal thread extending through the head segment downwardly into the neck segment;
an annular pressure plate about the neck segment of the nut body; and first and second retaining means for maintaining the pressure plate rotatably and unlosably about the nut body, said first retaining means comprising a collar about the nut body defining a surface which coacts with an upper opposing surface of the pressure plate to limit the upward travel of the pressure plate along the nut body, and said second retaining means comprising at least one projection on the neck segment extending upwardly and outwardly defining an outer ramp and an upper surface extending axially from the neck segment, and a downwardly and inwardly declining projection about the inner surface of the pressure plate defining an inner ramp and a lower surface extending axially inwardly of the pressure plate, said outer and inner ramps coacting to enable the pressure plate to be snap fitted over the neck segment and said upper and lower surfaces coacting to limit the travel of the pressure plate downwardly along the nut body.
a nut body having an upper head segment and a lower neck segment being coaxial with the head segment, the nut body defining a bore centrally through it, the bore having an internal thread extending through the head segment downwardly into the neck segment;
an annular pressure plate about the neck segment of the nut body; and first and second retaining means for maintaining the pressure plate rotatably and unlosably about the nut body, said first retaining means comprising a collar about the nut body defining a surface which coacts with an upper opposing surface of the pressure plate to limit the upward travel of the pressure plate along the nut body, and said second retaining means comprising at least one projection on the neck segment extending upwardly and outwardly defining an outer ramp and an upper surface extending axially from the neck segment, and a downwardly and inwardly declining projection about the inner surface of the pressure plate defining an inner ramp and a lower surface extending axially inwardly of the pressure plate, said outer and inner ramps coacting to enable the pressure plate to be snap fitted over the neck segment and said upper and lower surfaces coacting to limit the travel of the pressure plate downwardly along the nut body.
2. The wheel nut of Claim 1, wherein the projection on the neck segment is a shoulder which surrounds the neck segment and projects outwardly and upwardly, the outer diameter of the shoulder being larger than the inner diameter of the projection about the inner surface of the pressure plate, and the nut body or the pressure plate possesses an elasticity which makes possible a snap joining of the pressure plate about the nut body.
3. The wheel nut of Claim 1, wherein the neck segment extends beyond the bottom of the pressure plate to provide a surface for centering a bolt hole of a wheel disk about a bolt.
4. The wheel nut of Claim 1, wherein the lower end of the neck segment is conically bevelled.
5. The wheel nut of Claim 1, wherein the opposing surfaces of the collar and pressure plate comprising the first retaining means are complementary enlarging conical surfaces having a conical angle .alpha. of about 5° to 30°.
6. The wheel nut of Claim 5, wherein the conical angle .alpha. is about 15°.
7. The wheel nut of Claim 1, wherein the opposing surfaces of the collar and pressure plate comprising the first retaining means are annular surfaces extending perpendicular to the axis of the nut body.
8. The wheel nut of Claim 1, wherein the opposing surfaces of the collar and pressure plate comprising the first retaining means are spherically curved surfaces complementary to each other.
9. The wheel nut of Claim 1, wherein at least one of the opposing surfaces of the collar and pressure plate comprising the first retaining means is coated with a corrosion resistant material having a low coefficient of friction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000480527A CA1281925C (en) | 1985-05-01 | 1985-05-01 | Wheel nut for fastening commercial vehicle wheels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000480527A CA1281925C (en) | 1985-05-01 | 1985-05-01 | Wheel nut for fastening commercial vehicle wheels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1281925C true CA1281925C (en) | 1991-03-26 |
Family
ID=4130403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000480527A Expired - Lifetime CA1281925C (en) | 1985-05-01 | 1985-05-01 | Wheel nut for fastening commercial vehicle wheels |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1281925C (en) |
-
1985
- 1985-05-01 CA CA000480527A patent/CA1281925C/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121205 |