EP3475678A1

EP3475678A1 - Running drum arrangement for a tyre testing stand and tyre testing stand with the running drum arrangement

Info

Publication number: EP3475678A1
Application number: EP17725935.5A
Authority: EP
Inventors: Jens Eisenbeiss
Original assignee: ZF Friedrichshafen AG
Current assignee: ZF Friedrichshafen AG
Priority date: 2016-06-22
Filing date: 2017-05-22
Publication date: 2019-05-01
Also published as: JP2019525143A; US20190204186A1; DE102016211203A1; WO2017220269A1

Abstract

For fastening impact strips on running rollers of tyre testing stands, the impact strips are mounted on the running rollers by simple screw connections. In this case, the loads occurring in the circumferential direction must be transferred between the impact strip and the drum by friction. The fastening screws thereby undergo very high structural loading. Therefore, with this fastening concept, only relatively small loads are permissible in the circumferential direction. For this purpose, a running drum arrangement (1) for a tyre testing stand is proposed, with a running drum (2), wherein the running drum (2) defines an axis of rotation R, wherein the running drum (2) has at least one fastening means receptacle (8), wherein the fastening means receptacle (8) defines a main axis H, with at least one impact strip (4), wherein the impact strip (4) is arranged on a radial outer side of the running drum (2) with respect to the axis of rotation R, with at least one fastening means (7), wherein the fastening means (7) fastens the impact strip (4) on the running drum (2), and wherein the fastening means (7) is received in the fastening means receptacle (8), wherein the running drum arrangement (1) has at least one shaped piece (11), wherein the shaped piece (11) is arranged between the running drum (2) and the impact strip (4), wherein the shaped piece (11) forms with the running drum (2) and with the impact strip (4) a form fit in the circumferential direction in relation to the axis of rotation R.

Description

Lauftrommelanordnunq for a tire test bench and tire test with the

Running barrel assembly

The invention relates to a running drum arrangement for a tire test stand having the features of the preamble of claim 1 and to a tire test stand having the running drum arrangement having the features of claim 12.

For mounting of blow bars on tires of tire test stands, the blow bars are mounted by a simple screw on the rollers. The occurring loads in the circumferential direction must be transmitted by friction between the blow bar and drum. The mounting screws experience a very high bending load. Therefore, only relatively small loads in the circumferential direction are permitted in this attachment concept. Thus, the design of the blow bar attachment limits the permissible wheel contact force, shape and height of the blow bar, roll speed and cross-sectional shape of the tire.

The document DE 299 23 728 U1, which probably forms the closest prior art, describes a running drum for a motor vehicle or tire test stand, wherein a segment of the tread is removable and an obstacle with a negative radial elevation can be used. In the cylindrical barrel drum a machined support plate is welded to the various obstacles and the removable original tread piece can be screwed. In the case of individual obstacles, the most simple solution is the bolt-on blow bar, because it is the fastest to assemble in test mode.

The invention has for its object to provide a running drum assembly for a tire test, which allows a higher load on the blow bars. This object is achieved by a running drum arrangement for a tire test stand with the features of claim 1 and a tire test stand with the running drum arrangement having the features of claim 12. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description and / or the accompanying figures.

According to the invention, a running drum arrangement for a tire test stand is proposed. In particular, the running drum arrangement has the function of simulating a test of a dashboard in a vehicle tire, preferably for different speeds. In particular, the vehicle tire is a car tire or a motorcycle tire or a truck tire.

The running drum assembly has a running drum. The running drum in particular has the function of simulating a road surface. In particular, a test load is applied to the vehicle tire so that e.g. a wheel contact force is simulated. Preferably, the running drum is cylindrical, wherein the cylinder jacket surface forms a running surface. In particular, the running drum and the vehicle tire are movable relative to one another, so that preferably the vehicle tire, in particular the peripheral surface of the vehicle tire, is in contact with the running drum, in particular the running surface, and / or can be brought into contact. In particular, the running drum on a road surface or a steel coating. Preferably, the running drum is driven by a drive device.

The barrel defines a rotation axis. In particular, the running drum is mounted coaxially with the axis of rotation. Preferably, the running drum is geared to the drive device.

The running drum has at least one fastening means receptacle for receiving a fastening means. In particular, the fastener receiving as a hole or a breakthrough, etc. is formed. Preferably, the fastener receiving extends from the running surface of the barrel drum radially in the direction of the axis of rotation. Preferably, the fastener receptacle has an inner thread, preferably a metric thread on. In particular, the running drum has a plurality of fastener receptacles. In particular, the fastener receptacles are arranged in the circumferential direction and / or in the axial direction with respect to the axis of rotation uniformly spaced from each other. The fastener receiving defines a major axis. In particular, the main axis is an axis of symmetry or a centerline or centerline. In particular, the main axis extends in the radial direction with respect to the axis of rotation.

The running drum assembly has at least one blow bar. In particular, the blow bar is a metal strip or a plastic strip or a composite strip. Preferably, the blow bar on a rectangular or an acute-angled or a square or a round profile. In particular, the blow bar has a height of more than 5 mm, preferably more than 20 mm, in particular more than 80 mm. Alternatively or optionally in addition, the blow bar has a height of less than 100 mm, preferably less than 60, in particular less than 10 mm.

The blow bar is disposed on a radial outside of the barrel drum with respect to the axis of rotation. In particular, blow bar is arranged on the running surface of the running drum. In particular, the tread drum assembly has more than two, more particularly four, blow bars. Preferably, the blow bars are arranged in the circumferential direction uniformly spaced from each other and / or can be arranged.

The running drum assembly has at least one fastening means for fastening the blow bar on the running drum. In particular, the fastening means has the function to fix the blow bar on the radial outer side of the barrel, so that preferably the blow bar is secured against lifting. In particular, the whip bar is completely or partially frictionally and / or positively and / or frictionally connected with running drum. In particular, the fastening means is designed as a screw means and / or as a clamping means and / or as a clamping means. The fastener is received in the fastener receiving. In particular, the fastener is in the fastening screwed and / or clamped and / or inserted and / or clamped.

In particular, the fastening means or the screw means is a hexagonal screw or a flat head screw or a countersunk screw, but particularly preferably the fastening means is a cylinder screw. In particular, the attachment means has an external thread, preferably a metric thread. In particular, the fastening means can be brought into engagement with the internal thread of the fastening means receptacle.

In the context of the invention, it is proposed that the running drum arrangement has at least one shaped piece. In particular, the fitting has the function of reducing stress on the fastener. In particular, the shaped piece has a round or a square or a rectangular or an oval shape in a plan view. In particular, the molding is made of plastic or metal, preferably a metal alloy, or a composite material. The shaped piece is in particular formed separately from the fastening means.

The shaped piece is preferably arranged between the running drum and the blow bar. In particular, the shaped piece is arranged coaxially and / or concentrically with the main axis. Preferably, the fitting is introduced and / or introduced into the fastener receiving. In particular, the fitting has a fitting opening. Preferably, the fitting opening for receiving and / or guiding the fastening means is formed.

The fitting forms on the one hand with the running drum and on the other hand with the blow bar a form fit in the direction of rotation to the axis of rotation. When mounting the blow bar, in particular in a first assembly step, the fitting is inserted on the running drum, preferably in the fastening means receptacle. Depending on the length of the barrel and / or the length of the beater bar further fittings are preferably used in further fastener receptacles. In a second assembly step, in particular the blow bar is placed on the fitting, so that the mold preferably forms a positive locking in the circumferential direction with respect to the axis of rotation and / or in the radial direction with respect to the main axis with the blow bar and the barrel.

In a third assembly step, in particular, the fastening means is introduced into the fastening means receptacle, so that preferably then the beating strip and the fitting are braced radially in the direction of the axis of rotation by means of the fastening means with the running drum.

In particular, the blow bar has at least one fastener guide opening for guiding the fastener. In particular, the fastening means opening is a hole or an opening. Preferably, the fastening means guide opening is arranged coaxially to the main axis and / or arranged. In particular, the fastening means can be introduced and / or introduced axially along the main axis, through the fastening means guide opening, the fitting opening and the fastening means receptacle. Preferably, the fastening medium guide opening is designed as a counterbore, so that in particular the screw means, preferably a screw head, in the blow bar can be lowered. In particular, the counterbore has a conical or cylindrical countersink.

The advantage of the invention is, in particular, that the fitting absorbs a load or at least a partial load in the circumferential direction by the positive connection with the blow bar and the barrel, and thus a bending stress of the fastener can be significantly reduced. As a result, higher loads are also possible in the dashboard test. Furthermore, the blow bar especially on the highly stressed screwing no additional notches. As a result, comparatively very high loads can be absorbed in the circumferential direction. Another advantage is the cost-effective production of the blow bars, as in particular the Zerspan tion wall is low. It is particularly advantageous that only one each for each blow bar width Set of fittings must be made, which can then attach blow bars of different height but also blow bars at any angle to the drum. Even if two or more fittings are used per blow bar, angled mounting and mounting at an angle not equal to 0 degrees is easily possible.

In a preferred embodiment of the invention, the shaped piece forms a first form-fitting coupling with the blow bar and a second form-fitting coupling with the running drum. In particular, the first and / or the second form-fitting coupling is a positive connection in the circumferential direction and / or in the radial direction with respect to the axis of rotation. Alternatively or optionally in addition, the first and / or the second form-fitting coupling is a positive connection in the radial and / or axial direction with respect to the main axis.

The first form-fitting coupling receives a load, which preferably acts on the blow bar during a test process, in the direction of rotation and outputs the load on the second form-fitting coupling to the running drum. In particular, the load is a force acting in the direction of rotation, preferably a tangential force acting on the blow bar.

In a further preferred embodiment of the invention, the shaped piece has a first and a second fixing section. The two fixation sections in particular have the function of fixing the impact strip. In particular, the fitting has a groove, wherein the groove preferably serves as a guide for the blow bar. In particular, the first and second fixing portions are formed by the groove. In particular, the two fixing portions are formed as webs or flanks. Preferably, the two fixing portions are parallel to each other.

In particular, the two fixing portions extend in the axial direction with respect to the main axis in the direction of the blow bar, preferably radially away from the axis of rotation. In particular, the two fixing sections have a height of at least 1 mm, preferably more than 5 mm, in particular more than 10 mm. Alternatively or optionally in addition, the two fixing sections in particular have a height of less than 20 mm, preferably less than 8 mm, in particular less than 3 mm.

The two fixing sections embrace the blow bar on both sides and form the first positive locking coupling in the radial direction with respect to the main axis. In particular, the two fixing portions engage around the beater bar, so that preferably a force acting on the beater bar, e.g. the tangential force is transmitted to at least one of the two fixing sections. In particular, the two fixing portions surround the beater bar in such a way, so that in the absence of the fastener, the beater bar is displaced only within the groove and / or constrained in the groove. In particular, the two side surfaces parallel to each other and preferably define a width of the blow bar.

In a preferred implementation, the first fixing section are in a form-fitting manner against a first side surface of the blow bar and / or the second fixing section against a second side surface of the blow bar. In particular, the two fixing portions are spaced apart from each other so that the distance corresponds to the width of the blow bar. Preferably, the beater bar between the two fixing portion is free of play, in particular form-fitting and / or frictional and / or non-positive, or arranged with a small clearance. In particular, the clearance is less than 2 mm, preferably less than 0.5 mm, in particular less than 0.1 mm. In particular, the blow bar has a width of more than 10 mm, preferably more than 30 mm, in particular more than 100 mm. Alternatively or optionally in addition, the blow bar in particular has a width of less than 200 mm, preferably less than 50 mm, in particular less than 15 mm.

The fastener receiving means has a contact section. In particular, the fastening means receiving a contact portion for receiving the molding and a receiving portion for receiving the fastening means. In particular, the contact portion is prism-shaped or cuboid or cylindrical. In particular, the contact section forms a contour partner to the contact section. Preferably, the abutment section has a larger diameter. knife on than the receiving section. Particularly preferably, however, the fastening means receptacle is designed as a further counterbore. Preferably, the further counterbore has a cylindrical countersink, wherein particularly preferably the cylindrical countersink forms the contact section.

The fitting has a contact portion. In particular, the contact portion has the function of centering the fitting in the radial and / or axial direction with respect to the main axis and preferably forwarding the load to the abutment portion or to the running drum. In particular, the contact portion is cylindrical or cube-shaped or cuboidal or prismatic.

The contact section has a first and a second contact region. In particular, an outer surface of the contact portion forms the first contact region. In particular, a base area of the contact section forms the second contact area. Particularly preferably, however, an outer cylinder jacket surface forms the first contact region and a lower cylinder base surface forms the second contact region. In particular, the contact portion extends coaxially to the main axis and / or radially in the direction of the rotation axis R. More preferably, the contact portion is formed as a hollow cylinder.

The molding forms with the contact portion, the second form-fitting coupling in the radial and / or axial direction with respect to the main axis. In particular, the contact section has a first and a second contact part section. In particular, the first contact part section is an inner surface of the contact section and the second contact section is in particular a base of the contact section. However, the first contact part section is particularly preferably a cylinder jacket inner surface of the contact section or the cylindrical countersink. Preferably, the second plant part section is a planar base of the abutment section or the cylindrical countersink.

In particular, the first contact region with the first contact part section forms the second positive coupling in the radial direction with respect to the main axis. Alternatively or optionally complementarily forms the second contact area with the second Anlageteilabschnitt the second form-fitting coupling in the axial direction with respect to the main axis. In particular, the first and / or the second contact region are completely and / or partially axially along the main axis in the direction of the axis of rotation in the fastener receiving, preferably in the contact section, inserted and / or inserted.

Preferably, the first and / or the second contact area are free of play, in particular form-fitting and / or frictional and / or non-positively arranged in the contact section. Alternatively, the first and / or the second contact area are arranged with a small clearance in the contact section. In particular, the clearance is less than 2 mm, preferably less than 0.5 mm, in particular less than 0.1 mm.

In a constructive implementation, the fitting has a lower support portion. In particular, the lower support portion extends in the radial direction with respect to the main axis. Preferably, the lower support portion, in particular in a bottom view, forms a circular ring. In particular, a circular ring surface of the circular ring forms the lower bearing section. In particular, the contact section adjoins the inner circle of the circular ring.

The lower support portion rests against the running surface and forms with the running drum, preferably the running surface, a form fit in the radial direction with respect to the axis of rotation. In particular, the lower support portion lies on the entire surface or in sections on the radial outer side of the running drum and forms a positive engagement radially in the direction of the axis of rotation. Alternatively, the lower support portion is spaced from the running drum, wherein in particular the mold with the second contact region forms the positive connection in the radial direction with respect to the axis of rotation.

In a further constructive implementation, the shaped piece has an upper support section. In particular, the upper support portion extends in the radial direction with respect to the main axis. In particular, close to the upper support portion in the opposite direction to the contact portion, the two Fixation sections on. In particular, the two fixing portions are arranged perpendicular to the upper support portion.

The upper support section rests on a lower side of the blow bar and forms a positive locking in the radial direction with respect to the axis of rotation with the blow bar. In particular, the blow bar is in a mounted state on the upper support portion, wherein preferably the attachment means braces the blow bar and the fitting.

In a preferred embodiment, the blow bar on the bottom of a recess. The recess has in particular the function of receiving the fitting, so that the bottom of the blow bar preferably rests over its entire surface on the barrel and / or the fitting. In particular, the recess has the advantage that an over-definition is avoided. The blow bar is preferably either on the fitting or particularly preferably on the running drum.

The recess extends in sections in the region of the molded piece in the longitudinal extent and / or the transverse extent of the blow bar. In particular, the recess is produced by means of a separation process and / or a forming process and / or a primary molding process. In particular, the recess is a groove or a bore or a cutout. In particular, the recess extends on the underside of the blow bar over the entire width. In particular, the recess in the longitudinal extent of the blow bar is limited, wherein the recess preferably corresponds at least to the outer diameter of the molded piece.

In an alternative or optional complementary embodiment, the blow bar on the bottom of a recess. In particular, the recess has the function of forming a further form-locking coupling in the direction of rotation and / or in the axial direction with respect to the axis of rotation.

The recess extends in the longitudinal extent and / or the transverse extent of the blow bar completely and / or in sections. In particular, the Recess produced by means of the separation process and / or the forming process and / or the original molding process. In particular, the recess is formed as a groove or a bore or a depression. In particular, the recess preferably extends over the entire length at the bottom of the blow bar. Alternatively, the recess extends only at the bottom of the blow bar in the region of the shaped piece in the longitudinal direction.

The recess forms a first and a second web portion, wherein the web portions engage around the molding on both sides. In particular, the web portions are parallel to each other. Preferably, the web portions in the longitudinal extent and / or the transverse extent are spaced apart from one another such that the shaped piece is arranged without clearance between the two web portions, preferably positively and / or non-positively and / or frictionally engaged and / or can be arranged.

Alternatively or optionally complementarily extend the two web portion over the width of the blow bar at the bottom, so that a positive connection of the shaped piece with the blow bar in the axial direction with respect to the axis of rotation. Alternatively or optionally additionally, the shaped piece additionally has the two fixing sections, so that the shaped piece forms a positive connection, in particular in the radial direction with respect to the main axis, and preferably completely fixes the blow bar.

In a preferred implementation, the blow bar is fastened parallel or skewed to the axis of rotation on the barrel drum. In particular, the blow bar on a plurality of fastening guide openings. In particular, at least one, preferably each fastener guide opening, associated with a fitting. In particular, the beater bar has at least two, preferably at least four, in particular more than six fastener guide openings, wherein in particular each fastener guide opening is associated with a molded piece. In particular, the fittings are rotatable in the fastener receiving, so that the fittings, depending on the arrangement of the blow bar on the running drum, are aligned in their direction. In a first mounting position, the blow bar is arranged parallel to the axis of rotation. In particular, the blow bar defines a fastening axis in the first mounting position, wherein the fastening axis preferably runs parallel to the axis of rotation. In particular, the blow bar can be arranged in further mounting positions, wherein the blow bar twisted in the other mounting positions and / or arranged offset to the mounting axis and / or arranged. Preferably, the blow bar forms in the other mounting positions an angle with the mounting axis. In particular, the angle is more than 10 °, preferably more than 25 °, in particular more than 65 °. Alternatively or optionally in addition, the angle is in particular less than 75 °, preferably less than 50 °, in particular less than 20 °.

In a preferred refinement, an elastomer layer is arranged over the whole area or in sections between the blow bar and the running drum. In particular, the elastomer layer has the function of compensating for tolerances and / or preventing damage to the running drum. In particular, the elastomer layer on the underside of the blow bar can be arranged and / or arranged. In particular, the elastomer layer is arranged over the entire underside of the blow bar.

Alternatively, the elastomer layer is in particular arranged in sections between at least two spaced-apart moldings. In particular, the elastomer layer extends over more than 10%, preferably more than 40%, in particular more than 70% of the underside of the blow bar. Alternatively or optionally additionally, the elastomer layer extends in particular less than 90%, preferably less than 60%, in particular less than 30% of the underside of the blow bar.

In particular, the elastomer layer is self-adhering to the underside of the blow bar and / or on the running drum, preferably on the radial Au ßenseite the running drum, arranged and / or anordbar. In particular, the elastomer layer is formed as a strip element, for example, the strip element is a Rubber strips, a foam strip, a pore rubber strip, etc. In particular, the blow bar on at least one, preferably more than two, in particular more than six such strip elements.

Another object of the invention is a tire test stand with the running drum arrangement as described above or according to one of the preceding claims.

Further features, advantages and effects of the invention will become apparent from the following description of preferred embodiments of the invention. Showing:

Figure 1 shows a three-dimensional representation of a running drum assembly in an assembled state as an embodiment of the invention;

Figure 2 shows a cross section along a major axis through a

Blow bar with a fitting of the tread drum assembly;

FIG. 3 a shows a top view of the molded piece of the running-drum arrangement as a single part;

Figure 3b shows a front view of the fitting of the treadmill assembly as a single part;

Figure 3c shows a perspective view of the fitting of the tread drum assembly obliquely from behind as a single part;

Figure 3d shows a perspective view of the fitting of the tread drum assembly obliquely from the front as a single part;

FIG. 4 shows in a three-dimensional partial representation the running drum arrangement with the blow bar; FIG. 5 shows in the same representation as in FIG. 4 the running drum arrangement with an alternative arrangement of the striking strip;

FIG. 6 shows in an exploded view the running drum arrangement in a partial view with an elastomer layer;

FIG. 7 shows the blow bar in a three-dimensional representation as

Item;

Figure 8 shows in the same representation as in Figure 2, the blow bar and the

Shaped the Lauftrommelanordnung in an alternative design implementation;

FIG. 9 shows a longitudinal section along the main axis through the blow bar and the shaped piece of the running drum arrangement.

Corresponding or identical parts are each provided with the same reference numerals in the figures.

Figure 1 shows in a three-dimensional representation a running drum arrangement 1. For example, the running drum arrangement 1 is a part of a tire test stand, e.g. a high-speed uniformity test bench. The running drum assembly 1 has a running drum 2. The running drum 2 has a cylindrical shape, wherein the outer cylinder jacket surface forms a running surface 3. For example, a vehicle tire to be tested rolls on the tread 3, the vehicle tire e.g. is subjected to a test load, so that a wheel contact force is simulated.

For example, the tread 3 a road surface, corundum, metal coating, etc. on. The running drum 2 defines an axis of rotation R, wherein the running drum 2 in the direction of rotation with respect to the axis of rotation R in a running drum receiving 5 is rotatably mounted. For example, the running drum 2 is driven by a drive device or rotated.

The tread 3 has at least one blow bar 4, shown schematically on. For example, the blow bar 4 is a metal strip, a plastic strip, etc., wherein the blow bar 4 in the illustration shown, parallel to the axis of rotation R on the tread 3, e.g. non-positively and / or frictionally and / or positively, is attached. For example, the roller has further blow bars, which e.g. are arranged in the circumferential direction with respect to the axis of rotation uniformly or non-uniformly spaced from each other. The blow bar 4 has e.g. the function of performing a puncture test on a vehicle tire to be tested.

Figure 2 shows in a cross section along a major axis H, the blow bar 4, a fastening means 7, a fitting 11 and the tread 3 of the tread drum 2. The blow bar 4 has a rectangular profile. For example, the blow bar 4 also have a triangular, square, round, etc. profile. The blow bar 4 has a blow bar top 4a and a beater bar base 4b and a first and a second blow bar side 4c, d, wherein the four sides 4a, b, c, d form the profile of the blow bar 4.

The fastening means 7 is formed in the embodiment shown as a cylinder head screw. For example, the fastening means 7 may be any desired screw means, for example countersunk screw, hexagon screw, etc., or may also be designed as a quick-clamping means, etc., for example. The blow bar 4 has at least one fastener guide opening 6 for guiding the fastener 7. The fastener guide opening 6 is a bore, wherein the fastener 7 is guided through the fastener guide opening 6 with a small clearance, eg at least 0.5 mm and / or at most 1 mm. The fastening means guide opening 6 has a cylindrical countersinking in the area of the blow bar upper side 4a. The fastening means 7 or the cylinder head screw is arranged in such a way in the fastener guide opening 6, so that the fastening means 7 is completely sunk and the beater bar top 4a has no elevation.

The running surface 3 has at least one fastening means receptacle 8 for receiving the fastening means 7. The fastener receiving 8 extends from the outside of the tread 3 radially in the direction of the rotation axis R. The fastener receiving 8 defines, for. with the axis of symmetry or the central axis, a major axis H. The major axis H intersects the axis of rotation R and is e.g. perpendicular to the axis of rotation R.

The fastener receiving 8 has a contact portion 9 and a receiving portion 10. The receiving portion 10 is formed by a bore and has an internal thread, so that the fastening means 7 in the fastener receiving 8 and the receiving portion 10 can be screwed. The contact portion 9 is formed in the embodiment shown by a counterbore, in particular cylindrical countersink. For example, the contact section 9 can also be formed by a second bore, in particular with a larger diameter, such as the diameter of the receiving section 10.

The contact section 9 has a first and a second contact part section 9a, b. The first abutment portion 9a is formed by the cylindrical surface of the cylindrical countersink. The second abutment portion 9b is formed by the planar base of the cylindrical countersink, wherein the second abutment portion 9b forms a circular ring in a plan view.

Between the blow bar 4 and the tread 3, the fitting 11 is arranged. The fitting 11 has a first and a second fixing portion 12 a, b for fixing the blow bar 4. The fixing portions 12a, b form with the blow bar 4 a positive connection in the radial direction with respect to the main axis H and / or in the circumferential direction with respect to the rotation axis R. The first fixing portion 12a is located on the first beater bar side 4c and the second fixing portion 12b abuts the second blow bar side 4d so that the impact bar 4 is positively held between the two fixing portions 12a, b.

The fitting 11 has an upper and a lower support portion 14, 15. The two support sections 14, 15 extend in the radial direction with respect to the main axis H. The two fixing sections 12a, b adjoin the upper support section 15 parallel to the main axis H, wherein the two fixing sections 12a, b are in the direction of the beater bar top 4a extend.

A contact section 13 adjoins the lower support section 14 in the axial direction with respect to the main axis H. The contact section 13 has a first and a second contact region 13a, b. The first contact portion 13a abuts against the first abutment portion 9a and forms a positive engagement with the first abutment portion 9a in the radial direction with respect to the major axis H. The second contact portion 13b abuts against the second abutment portion 9b and forms a positive engagement with the second abutment portion 9b in the axial direction with respect to the major axis H.

The blow bar bottom 4b abuts on the upper support portion 15 of the mold 11, so that a positive engagement in the axial direction with respect to the main axis H and / or is formed in the radial direction with respect to axis of rotation R. The lower rest section 14, in the illustration shown, extends with a slight play toward the tread 3 radially outward with respect to the major axis H. Alternatively, the lower rest section 14 lies fully or partially on the tread 3, e.g. the second contact portion 13b abuts against the second abutment portion 9b or is spaced from the second abutment portion 9b.

The fitting 11 has a mold opening 16. The fastening means 7 penetrates, for example, in an assembled state of the fitting 11, the fitting 11 via the fitting opening 16. The fitting opening 16 is a bore, wherein the bore is center-centrally into the fitting 11 is introduced. The fastener Guide opening 6, the mold opening 16 and the fastener receiving 8 are arranged coaxially with respect to the main axis H to each other. The fastening means 7 is screwed axially along the main axis H in the fastener receiving means 8 and / or screwed, so that the fastening means 7 acts on the blow bar 4 and the fitting 11 radially in the direction of the tread 3 with a force.

Figures 3a, b, c and d show the fitting 11 in different perspectives. 3a shows the fitting 11 in a plan view, FIG. 3b shows the fitting 11 in a front view, FIG. 3c shows the fitting 11 obliquely from behind and FIG. 3d shows the fitting 11 obliquely from the front.

The molding 11 has a circular shape in plan view. The molding 11 has on the upper side or the upper support portion 15, the two fixing portions 12a, b. For example, the two fixing portions 12a, b are formed by a groove, which is e.g. by means of a separation process, is introduced into the fitting 11. For example, the molding 11 is formed in a prototype cylinder, wherein the two fixing portions 12a, b are formed by a cylindrical section. The two fixing portions 12a, b are parallel to each other, the distance between the two fixing portions 12a, b being e.g. the width of the blow bar 4 corresponds. For example, the two fixing sections 12a, b have a height of at least 5 mm.

The contact portion 13 has a cylindrical shape, and is center-centered on the underside of the fitting 11 and the lower support portion 14, respectively. The mold opening 16 is a through hole and is arranged concentrically to the contact portion 13, so that the contact portion 13 is formed as a hollow cylinder. The lower support portion 14 is formed in the bottom view as a circular ring. The first contact region 13a of the contact section 13 is formed by the cylinder jacket surface of the contact section 13 or of the hollow cylinder. The second contact portion 13b is formed by the base of the contact portion 13 and the hollow cylinder. The fitting 11 is for example formed in one piece or one piece. For example, the fitting 11 consists of a metal and / or a plastic and / or a composite material.

FIG. 4 shows a partial section of the running drum arrangement 1 in a three-dimensional representation. The running drum arrangement 1 has a plurality of the fastening means receptacles 8. The fastener receptacles 8 are arranged in the circumferential direction and / or in the axial direction with respect to the rotation axis R uniformly spaced from each other on the running surface 3. For example, the fastener receptacles 8 are arranged concentrically and / or coaxially with the axis of rotation R in one or more circles.

The blow bar 4 is arranged on the running surface 3 parallel to the axis of rotation R. The blow bar 4 defines in this mounting position a mounting axis B. The mounting axis B is in particular formed by the longitudinal axis or axis of symmetry of the blow bar 4 and extends parallel to the axis of rotation R. The blow bar 4 has four attachment points in the embodiment shown, each attachment point on the Fixing axis B is located. The attachment points are e.g. formed by the fastener receiving 8, the fitting 11 and the fastening means 7. Further fastener receptacles 8 of the running drum 2, which are not used for the attachment of the blow bar 4, are connected to a closure means 17, e.g. provided a plug or a screw. The closure means 17 has the function of fastening means receptacles 8 e.g. to protect against contamination.

Figure 5 shows in the same representation as in Figure 4, the tread assembly 1 with an alternative attachment of the blow bar 4. The blow bar 4 is rotated to the mounting axis B arranged so that the blow bar 4 and the mounting axis B form an angle α. For example, the angle α is 30 or 45 degrees. The blow bar 4, in the illustration shown on a slightly curved shape, which adapts to the tread 3 in the direction of rotation, so that the blow bar rests for example on the entire surface of the tread 3. The axial ends of the blow bar 4 are chamfered, so that a flush conclusion with the tread 3 and the running drum 2 takes place. Figure 6 shows an exploded view of a partial section of the barrel assembly 1 with the blow bar 4, the fastener 7 and the fitting 11. The fitting 11, the fastener 7 and the Befestigungsmittelführungs- opening 6 of the blow bar 4 are arranged coaxially to the main axis H. Between the running surface 3 and the blow bar 4, an elastomer layer 18 is arranged. The elastomer layer 18 serves to prevent damage to the running surface and / or to compensate for tolerances. For example, the elastomer layer is a rubber strip, which is glued eg attachable to the beater bar base 4b and / or the running surface 3, for example. The elastomer layer 18 is arranged for example in sections or over the entire surface between the blow bar 4 and the running surface 3.

FIG. 7 shows the blow bar 4 in a three-dimensional representation from a bottom view. The blow bar 4 has four recesses 19 on the beater bar base 4b. The recesses 19 are formed such that each one of the fittings 11 in one of the recesses 19 can be accommodated. Through the recesses 19 is the blow bar 4 with the beater bar base 4b on the tread 3 and the elastomer layer 18 over its entire surface or partially. The recesses

The recess 19 is delimited in the longitudinal extent of the blow bar 4, wherein the length of the recess 19 in the longitudinal extent of at least the length or the diameter of the fitting 11 corresponds. For example, the shaped piece 11 and the recess 19 in the longitudinal extent of the blow bar 4 forms another positive fit.

Figure 8 shows in the same representation as in Figure 2, the blow bar 4 and the fitting in an alternative structural implementation. The blow bar 4 has on the beater bar base 4b a recess 20. For example, the recess 20 is a groove which extends completely or in sections in the longitudinal extent of the blow bar 4. For example, the recess

20 has a rectangular or a trapezoidal cross section. By the In Fig. 20, a first and a second land portion 21 a, b is formed. The two web portions 21 a, b are spaced parallel to each other and extend, for example, in the axial direction with respect to the rotation axis R. In the alternative embodiment, the mold piece 1 1 is flattened in a plan view on two opposite sides, so that a first and a second further contact portion 22a, b is formed. For example, the molded piece 1 1, formed in a prototype cylinder, wherein the two further contact portions 22 a, b formed by a double-sided cylinder flattening.

The two other contact portions 22a, b form with the blow bar 4, in particular the two web portions 21 a, b a positive connection in the radial direction with respect to the main axis H and / or in the circumferential direction with respect to the rotation axis R. The first further contact portion 22 a lies on the first web portion 21 a, in particular on an inner side of the first web portion 21 a, on. The second contact section 22b abuts against the second web section 21b, in particular on an inner side of the second web section 21b. The blow bar 4 surrounds the fitting 1 1 on both sides, wherein the fitting 1 1 between the two web portions 21 a, b is held positively.

As already described in FIG. 2, the first contact region 13 adjoins the first contact part section 9a and forms with it a positive connection in the radial direction with respect to the main axis H. The second contact region 13b abuts against the second contact part section 9b and forms the second Anlageteilabschnitt 9b a form fit in the axial direction with respect to the main axis H. Alternatively or optionally supplementing the lower support portion 14 is on the tread 3 over the entire surface or partially on.

The blow bar base 4b rests on the running surface 3 and / or the elastomer layer 18, so that a positive connection in the axial direction with respect to the main axis H and / or in the radial direction with respect to the axis of rotation R is formed. Alternatively or optionally additionally, a base surface of the recess 20 rests on the upper support section 15, so that in particular the beater bar underside 4b and the running surface 3 and / or the base surface of the recess 20 and the upper bearing portion 15 form a positive connection in the axial direction with respect to the main axis H and / or in the radial direction with respect to the axis of rotation R.

Figure 9 shows in a longitudinal section along the main axis H, the blow bar 4, the fastening means 7, the fitting 11 and the tread 3 and the running drum 2. The recess 19 and / or the recess 20 are formed for example by a Scheibenfräser, wherein the fitting 11 is spaced apart in the radial direction and / or in the axial direction with respect to the axis of rotation R with respect to the recess 19 and / or the recess 20.

LIST OF REFERENCE NUMBERS

Running barrel assembly

revolving drum

tread

rasp bar

a blow bar top

b Barrel bottom

c first blow bar side

b second blow bar side

Running recording drum

Fastener guide opening

fastener

Mounting borrowing

contact section

a first part of the plant section

b second part of the plant section

0 recording section

1 fitting

2a first fixation section

2b second fixation section

3 contact section

3a first contact area

3b second contact area

4 lower support section

5 upper support section

6 fitting opening

7 closure means

8 elastomer layer

9 recess

0 recess

1 a first bridge section 21 b second web section

22a first further contact area

22b second further contact area

R rotation axis

H main axis

B fixing axle

Claims

claims

A treadmill assembly (1) for a tire test rig, comprising a treadmill (2), the turret (2) defining a rotation axis (R), the tread drum (2) having at least one fastener receiving means (8), the fastener receiving means (8) a major axis (H) defined with at least one

A blow bar (4), wherein the blow bar (4) is arranged on a radial outer side of the running drum (2) with respect to the axis of rotation (R), with at least one fastening means (7), wherein the fastening means (7) the blow bar (4) mounted on the running drum (2) and wherein the fastening means (7) is received in the fastener receiving means (8), characterized in that the running drum assembly (1) comprises at least one molding (11), the molding (11) being located between the running drum (11). 2) and the blow bar (4) is arranged, wherein the shaped piece (11) with the running drum (2) and with the blow bar (4) forms a positive connection in the direction of rotation to the axis of rotation (R).

2. barrel drum assembly (1) according to claim 1, characterized in that the shaped piece (11) forms a first positive connection with the blow bar (4) and a second form-fitting coupling with the barrel drum (2), wherein the first form-fitting coupling receives a load in the direction of rotation and the load on the second form-locking coupling to the running drum (2) emits.

3. barrel drum assembly (1) according to claim 2, characterized in that the shaped piece (11) has a first and a second fixing portion (12 a, b), wherein the two fixing portions (12 a, b) engage around the blow bar (4) on both sides and the form first positive locking coupling in the radial direction with respect to the main axis (H), the two fixing sections (12a, b) receiving a force acting on the blow bar (4).

4. barrel drum assembly (1) according to claim 3, characterized in that the first fixing portion (12 a) on a first side surface (4 c) of the blow bar (4) and / or the second fixing portion (12b) on a second side surface (4d) of the blow bar (4) rests positively.

5. barrel drum assembly (1) according to one or more of claims 2 to 4, characterized in that the fastening means receptacle (8) has a contact portion (9) and the fitting (11) has a contact portion (13), wherein the contact portion (13) forms the second form-fitting coupling in the radial and / or axial direction with respect to the main axis (H) to the abutment portion (9).

6. barrel drum assembly (1) according to any one of the preceding claims, characterized in that the shaped piece (11) has a lower support portion (14), wherein the lower support portion (14) on the running drum (2) and bears with the running drum (2) forms a positive connection in the radial direction with respect to the axis of rotation (R).

7. barrel drum assembly (1) according to any one of the preceding claims, characterized in that the shaped piece (11) has an upper support portion (15), wherein the upper support portion (15) rests against an underside of the blow bar (4) and with the blow bar ( 4) forms a positive connection in the radial direction with respect to the axis of rotation (R).

8. barrel drum assembly (1) according to any one of the preceding claims, characterized in that the blow bar (4) on the underside a recess (19) for receiving the shaped piece (11), wherein the recess (19) sections in the region of the fitting (11) in the longitudinal extent and / or the transverse extent of the blow bar (4).

9. barrel drum assembly (1) according to any one of the preceding claims, characterized in that the blow bar (4) has a recess (20) on the underside, wherein the recess (20) in the longitudinal extension and / or the transverse extent of the blow bar (4 ) extends completely and / or in sections, wherein the recess (20) at least a first and a second web Section (21a, b) forms, wherein the two web portions (21a, b) engage around the mold piece (11) on both sides.

10. barrel drum assembly (1) according to any one of the preceding claims, characterized in that the blow bar (4) parallel or skewed to the axis of rotation (R) on the barrel drum (2) can be fastened.

11. Lauftrommelanordnung (1) according to any one of the preceding claims, characterized in that between the blow bar (4) and the running drum (2) over the entire surface or sections of an elastomer layer (18) is arranged.

12. tire test rig with the running drum assembly (1) according to any one of the preceding claims.