DE102016210749A1 - Profile rail trolley of a linear bearing - Google Patents

Abstract

Embodiments relate to a profiled rail carriage (105) of a linear bearing (100-1, 100-2, 100-3), comprising a lubricant dispenser (110). The lubricant dispenser (110) comprises a lubricant reservoir (115) which extends in the mounted state of the lubricant dispenser (110) above a roller body channel (120) of the profile rail wagon (105). The lubricant dispenser (110) additionally comprises a lubricant supply (125) located below the lubricant reservoir (115) and designed to lubricate lubricant from the lubricant reservoir (115) in the assembled state of the lubricant dispenser (110) to rolling elements (120) revolving in the rolling body channel (120). 130).

Description

Present embodiments are in the field of profiled rail cars of linear bearings.

Bearings and storage systems are commonly used to couple relatively movable components together. In this case, for example, the degree of freedom of the permitted movement between different types of bearings can be distinguished, e.g. Radial, Axial and Linear Bearings. The linear bearing can be used to guide a linear movement between two bodies. Some linear bearings may comprise a profile rail, a profiled rail carriage and a plurality of rolling elements for reducing the friction when guiding the profiled rail carriage along the rail. In this case, a regular lubrication of the rolling elements may be required to reduce wear. Regreasing processes, however, may require additional user intervention, which may require additional maintenance. If there is no intervention on the part of the user, it may not be possible to control an existing amount of lubricant and it may be too small. This can cause premature wear, and possibly even an exchange of components as a result of damage. In turn, maintenance and replacement processes can lead to unwanted downtime of a stored system.

It is therefore desirable to provide an improved compromise on maintenance and maintenance of lubrication in a linear bearing.

These requirements are borne by a profiled rail car of a linear bearing according to the independent claim.

According to a first aspect, embodiments relate to a profile rail carriage of a linear bearing, comprising a lubricant dispenser. The lubricant dispenser comprises a lubricant reservoir, which extends in the mounted state of the lubricant dispenser above a rolling element channel of the profile rail car. The lubricant dispenser also includes a lubricant supply located below the lubricant reservoir, which is designed to deliver lubricant from the lubricant reservoir to rolling elements revolving in the rolling body channel in the mounted state of the lubricant dispenser. The connectable to the profile rail carriage lubricant dispenser can be, for example, interchangeable, reversible, repeated or tool-free connectable to the former. In this way, a possibility for relubrication of the profile rail car can be provided, in which an intervention by a user may possibly be omitted. Storing lubricant, in other words, significantly prolongs a period of time between maintenance work. Furthermore, a dosage of the lubricant by a corresponding configuration of the lubricant supply, for example, a shape or area of a cross section can be specified.

In some embodiments, the lubricant supply is configured to prevent backflow of lubricant from the rolling elements into the lubricant reservoir. This may possibly prevent contamination of the lubricant remaining in the lubricant reservoir.

In some embodiments, the lubricant supply is configured to deliver lubricant from the lubricant reservoir to the rollers through an influence of gravity on the lubricant. Thus, under reduced cost, a backflow of lubricant from the rolling elements in the lubricant reservoir can be avoided.

In some embodiments, the lubricant dispenser is arranged along a guide rail between two deflection regions of the rolling body channel. An access to the lubricator, z. B. for assembly purposes, it may thus be easier. In addition, a restriction of the freedom of movement of the profile rail carriage in the direction of travel can be avoided by a corresponding arrangement if necessary.

In some embodiments, the lubricant dispenser has a contact surface, which is designed to at least partially limit the Wälzkörperkanal so that the plurality of rolling elements starts at the contact surface. The lubricant supply opens at the contact surface. Thus, provision of the lubricant directly at a required position can be enabled. This may possibly eliminate the need to introduce supply channels in components of the profile rail car, which would otherwise make it difficult to manufacture the profile rail car.

In some embodiments, the lubricant dispenser comprises a section of the rolling body channel along a running direction of the rolling elements. In other words, the Wälzkörperkanal can be formed in sections by the lubricant dispenser. Thus, if necessary, a more efficient application of lubricant to the rolling elements can take place.

In some embodiments, the lubricant dispenser is integrally formed. This may allow to significantly reduce manufacturing costs for the lubricator.

In some embodiments, the lubricant dispenser further comprises a valve which is freely accessible in the assembled state of the lubricant dispenser and opens into the lubricant reservoir. In particular, the valve may be formed as a grease nipple. Thus, upon exhaustion of the lubricant reservoir, a possibility for refilling lubricant can be provided.

In some embodiments, the lubricant dispenser has a projection. The projection is designed to engage positively or positively in a recess on the profile rail car. An additional fastener may possibly be omitted.

In some embodiments, the lubricant dispenser has a projection. The projection is designed to produce a snap-in connection with a recess on the profiled rail carriage. Thus, a further fastener, or even a tool use for attaching or loosening the lubricant dispenser may be omitted.

In some embodiments, the lubricant dispenser includes at least one cover configured to be bonded to the lubricant reservoir such that the lubricant reservoir and the cover include a cavity for the lubricant. This may eventually facilitate filling of the lubricant reservoir prior to assembly.

In some embodiments, the profile rail carriage further comprises a recess for receiving the lubricant dispenser, which at least partially overlaps the rolling body channel. Thus, it may be possible to mount the lubricator so that lubricant can be provided directly in the rolling element passage.

In some embodiments, the depression is located laterally relative to a direction of travel of the profile rail car from a recess provided for receiving a profile rail of the profile rail carriage that does not change after insertion or removal of the lubricant dispenser dimension of the profile rail carriage in or against the direction of travel. Thus, obstruction of the freedom of movement of the profile rail carriage in the direction of travel can be avoided by the lubricant dispenser.

In some embodiments, the recess projects from a bottom surface of the profile rail car into the profile rail carriage in such a way that after insertion or removal of the lubricant dispenser, a dimension of the profile rail carriage does not change in a direction perpendicular to the direction of travel. This may allow use of the profile rail car in an environment in which only reduced space for the profile rail car is available.

In some embodiments, the lubricant dispenser has at least one bore for receiving a fastening means for attachment to the profile rail carriage. An improvement in the stability of the connection between lubricator and profile rail car can be made possible.

In some embodiments, the profile rail carriage further comprises a fastening means for a reversible connection of the lubricant dispenser with the profiled rail carriage. The lubricant dispenser can thus be removed for refilling or maintenance purposes easier and possibly re-assembled.

According to a further aspect, embodiments relate to a method for lubricating a profiled rail car of a linear bearing. The method comprises mounting a lubricant dispenser such that a lubricant reservoir of the lubricant dispenser extends above a roller body channel of the profile rail car. The method also includes dispensing lubricant from the lubricant reservoir to rolling elements revolving in the rolling body channel via a lubricant supply located below the lubricant reservoir. Thus, an automatic and metered relubrication of the rolling elements can be considerably facilitated, whereby additional maintenance processes can be omitted under certain circumstances.

Further advantageous embodiments will be described in more detail below with reference to exemplary embodiments illustrated in the drawings, to which exemplary embodiments are not restricted. They show in detail:

1a , b is a profiled rail carriage according to a first embodiment in cross-sectional view and in exploded view;

2a , b is a profiled rail carriage according to a second embodiment in cross-sectional view and in exploded view; and

3a , B a profiled rail carriage according to a third embodiment in cross-sectional view and in exploded view.

In the following description of the accompanying drawings, like reference characters designate like or similar components. Further, summary reference numbers are used for components and objects that occur multiple times in one embodiment or in one representation, but are described together in terms of one or more features. Components or objects which are described by the same or by the same reference numerals may be identical in terms of individual, several or all features, for example their dimensions, but may also be different if the description does not explicitly or implicitly make reference to the description.

Profile rail guides, in particular mini-profile rail guides, can constantly be subject to increasing technical requirements. It can be set by a user increased value to the longest possible duration without interruption. For long running times can be enabled, relubrication of the carriage may be required at certain intervals. In order to further extend the relubrication times, and thus the running times, a corresponding lubricant reservoir can be used, which provides a sufficient amount of lubricant in the guide. Inadequate lubrication can lead to partial or even complete failure of the system and potentially high follow-up costs.

At present, conventional guide carriages can be equipped with a defined amount of grease (initial lubrication) before installation and installed in the guide system. The amount of grease in the carriage can thus allow a corresponding duration depending on the ambient conditions. When this time is reached, it may be necessary to stop and relubricate the system. The relubrication can be done via a central, automatic lubrication. However, an automatic lubrication can be very expensive, and may not be used everywhere. A traditional method of relubricating may provide for stopping and manual greasing of the system.

1a shows an embodiment of a linear bearing 100-1 in cross-sectional view, and

1b a structurally identical linear bearing 100-1 in exploded view. The linear bearing 100-1 includes a profile rail car 105 with a lubricant dispenser 110 ,

Profile rail cars 105 and lubricants 110 can be interchangeable, for example, interchangeable, reversible, repeated or tool-free connectable. The lubricant dispenser 110 includes a lubricant reservoir 115 in the assembled state of the lubricant dispenser 110 above a rolling element channel 120 of the profile rail car 110 extends. The lubricant dispenser 110 also includes one below the lubricant reservoir 115 located lubricant supply 125 , which is designed to be in the assembled state of the lubricant dispenser 110 Lubricant from the lubricant reservoir 115 in the rolling element channel 120 circumferential rolling elements 130 leave.

The lubricant reservoir 115 may comprise a hollow structure, which is adapted to a lubricant for relubrication of a plurality of rolling elements 130 of the profile rail car 105 of the linear bearing 100-1 take. The reservoir 115 For example, may have an upwardly open trough shape, and thereby in the assembled state by a wall surface located above the profile rail car 105 be closed. The lubricant supply 125 below the reservoir 115 can allow a flow of lubricant, which by means of gravity from top to bottom to the rolling elements located there 130 he follows. The lubricant supply 125 can z. B. be formed as a gap, the reservoir 115 with the rolling element channel 120 combines. In other words, the lubricant supply 125 one from the reservoir 115 to a contact surface 135 for the rolling elements continuous channel structure, which is an outlet of the lubricant at the contact surface 135 allows. The contact surface 135 this limits a part of the rolling element channel 120 so that the rolling elements 130 at the contact surface 135 start. At the start of the rolling elements 130 at the contact surface 135 becomes a mouth of the lubricant supply 125 rolled over, while leaking lubricant from the rolling elements 130 stripped. In this case, a dosage of the lubricant by a corresponding embodiment of the lubricant supply 115 , For example, a shape or cross-sectional area, are given.

In some embodiments, the lubricant supply 125 be adapted to a backflow of lubricant from the rolling elements 130 back to the reservoir 115 at least partially prevent. This can be z. B. by introducing a check valve, z. B. check valve, or a taper of the cross section to the Wälzkörperkanal 120 supported.

The profile rail car 105 can be designed to be on a profile or guide rail 140 to be mounted mobile, and a recess 180 for a recording of the guide rail 140 exhibit. At the guide rail 140 can it be z. B. act on a mini profile rail. Mini profile rail systems may differ from other, larger profile rail systems, for example, with respect to an upper load limit, which in mini-profile rails z. B. between 100 kg and 500 kg, or by a number of Wälzkörperreihen, by the profile rail car 105 on the guide rail 140 to be led. So has the mini profile rail, as in 1b shown, two laterally opposite profiles 145 for guiding rolling rolling elements 130 on. Larger profile rail systems can also be more, z. B. have four profiles. Accordingly, the profile rail car comprises 105 two rolling element channels 120 and two rows of rolling elements guided in it. The rolling elements 130 have a spherical shape. Accordingly, the rolling element channel 120 a circular cross-section, as in 1a to recognize.

The profile rail car 105 includes a recess 150 for receiving the lubricant dispenser 110 , The depression 150 overlaps the rolling element channel 120 at least partially. In other words, this may mean that the recess 150 a partial section of the rolling element channel 120 along the running direction of the rolling elements 130 completely overlaps, as in the 1a and b shown embodiment of the case, or only partially. The depression 150 projects, for example, from a bottom surface on the underside of the profile rail car 105 in the profile rail car 105 into it. The depression 150 may be configured such that, compared to a state before the introduction of the lubricant dispenser 110 , a dimension of the profile rail car 105 in a direction perpendicular to a direction of travel after introduction of the lubricant dispenser 110 does not change. In particular, while a dimension of the profile rail car 105 remain unchanged along the direction of gravity.

The profile rail car 105 In some embodiments, has a fastener 155 for a reversible connection of the lubricant dispenser 110 with the profile rail car 105 on. At the in 1a and b embodiment shown is the fastening means 155 an angle sheet 155-1 , A section of the angle sheet 155-1 extends in the assembled state horizontally along the bottom surface of the profile rail car 105 , and holds the lubricator 110 by means of positive locking in the intended recess 150 of the profile rail car 105 , Another section of the angle plate 155-1 extends from the horizontal portion, starting perpendicular at an angle of 90 ° between rails 140 and profiled rail cars 105 up to a region of the rolling element channel 120 in which the rolling elements 130 between guide rail 140 and profiled rail cars 105 unroll, and so a movement of the profile rail car 105 can facilitate. The angle sheet 155-1 can with an upwardly facing edge of the vertical section an additional contact surface for the rolling elements 130 form. Furthermore, the angle plate 155-1 by means of screw, snap-in connection, plug connection or otherwise form, force and / or material fit to the profile rail car 105 be connected.

In 1a and b includes the lubricant dispenser 110 a section of the Wälzkörperkanals 120 along the running direction of the rolling elements 130 , The route section can be arbitrarily far between two deflection regions of the rolling element channel 120 expand, and completely from the lubricator 110 includes his. A deflection region may, for example, follow a course of a circular arc over 180 °. The section of the rolling element channel 130 can thus completely through the lubricant dispenser 110 , or in other words, by the contact surface 135 be formed or limited. This section of the route can also be referred to as the return section. Accordingly, the lubricant dispenser 110 in some embodiments along the guide rail 140 Seen between the two deflection of the Wälzkörperkanals 120 be arranged.

Optionally, the profile rail car 105 a passage 160 exhibit. The passage 160 can after mounting the lubricator 110 in coincidence with an opening 165 of the lubricant dispenser 110 stand, so the reservoir 115 from an outside of the profile rail car 105 is accessible. In other words, the passage 160 freely accessible, and thus not of another component, eg. B. the profile rail car 105 , be covered so that a tool, such as a grease gun, can be attached to it. This may result in exhaustion of the reservoir 115 a refill with lubricant allows or simplified. The passage 160 or the opening 165 can continue to be designed as a nozzle, valve or grease nipple to prevent accidental leakage of lubricant.

The lubricant dispenser 110 may be at least partially or completely made of a plastic in some embodiments. The plastic can z. B. thermoset. Furthermore, the lubricant dispenser 110 be made in one piece. Under a one-piece component is understood to be such that z. B. is made exactly from a contiguous piece of material.

A second embodiment of a linear bearing 100-2 is in 2a and b, and a third embodiment of a linear bearing 100-3 in 3a and b shown. Same or comparable Components having a correspondence in a preceding figure bear like reference numerals herein, and are not explained again for the sake of clarity. Rather, it only deals with existing differences.

At the in 2a . 2 B . 3a and 3b Profile rail carriage shown 105 is the depression 150 related to a direction of travel of the profile rail car 105 laterally from the for receiving the rail 140 provided recess 180 , This can cause it by introducing or removing the lubricant dispenser 110 a dimension of the profile rail car 105 does not change in or against the direction of travel. However, this can create a horizontal width of the profile rail car 105 Change at right angles to the direction of travel.

The lubricant dispenser 110 is formed such that the reservoir 115 only partially above the lubricant supply 125 lies. For example, at least 60%, 80% or 90% of a reservoir volume of the reservoir 115 above a lower edge of the mouth of the lubricant supply 125 at the contact surface 135 lie. The term "above" may thus mean, in addition to the meaning "vertically above" also "obliquely above". Here, these terms are based on the vertically extending from top to bottom direction of gravity. The lubricant supply 125 rejuvenates from the reservoir 115 to the contact surface 135 leading to a return of already used lubricant into the reservoir 115 complicate or even prevent. The lubricant dispenser 110 also includes a cover 175 , The cover 175 is so to the reservoir 115 Tethered that cover 175 and reservoir 115 include the cavity for the lubricant. Optional is the cover 175 tool-free, reversible or repeated to the reservoir 115 connectable. This can be a filling and subsequent connection of the lubricant dispenser 110 to the profile rail car 105 considerably easier. Accidental dumping of lubricant during assembly, for example, can be more easily avoided.

The lubricant dispenser 115 can also have a valve (not shown) in these embodiments, which in the assembled state of the lubricant dispenser 110 is freely accessible and in the reservoir 115 empties. The valve can z. B. on the cover 175 located, and be designed as a grease nipple.

The lubricant dispenser 110 also has a lead 170 on, which is adapted to non-positively or positively in a recess on the profile rail car 105 intervene. Thus, the Schmermittelgeber 110 self-holding on profile rail car 105 be connected. The recess corresponds in some embodiments, as in 2a and b, the well 150 However, in other embodiments, also structurally from the recess 150 be separated. The lubricant supply runs 125 through the lead 170 , The lead 170 is at the in 2a and b embodiment shown formed to the recess a snap-in connection for connecting the lubricant dispenser 110 to the profile rail car 105 manufacture. In other words, the lead 170 a (in other form previously explained) fastener 155-2 correspond. At the projection 170 is also the contact surface 135 , which in this case only partially the rolling element channel 120 or the return portion of the Wälzkörperkanals 120 forms or confines.

The fastener 155 may also be at least a separate component, such as 3a and 3b show, for example, a plurality of screws 155-3 , The profile rail car 105 and the lubricator 110 can corresponding holes or tapped holes 185 for receiving the screws 155-3 exhibit.

These may additionally or alternatively to the projection 170 to be available. at 3a and 3b corresponds to the lubricant supply 125 only a gap in a profile rail car 105 facing side wall of the lubricant dispenser 110 , This can be the lead 170 and the depression 150 for receiving the lubricant dispenser 110 omitted. The gap is after mounting the lubricant dispenser 110 by means of the screws 155-3 through an inlet opening on the profiled rail car 105 which continues in the rolling element channel 120 empties. Furthermore, the profile rail car 105 in 2a . 2 B . 3a and 3b also a ball holding plate with a configuration corresponding to the angle plate 155-1 (see. 1a and b).

The problem of having a sufficient amount of lubricant in the guide system for a long time may be due to a lubricant dispenser 110 be solved according to the described embodiments. About the lubricant dispenser 110 For example, a desired amount of lubricant may be delivered to the guide system and thus lubricated for a prolonged period of time as compared to conventional solutions.

Once again explained in other words, in some embodiments, a matching lubricant reservoir attached to the ball return of the carriage. Through an opening is the lubricant reservoir with the ball circulation connected and the balls can absorb the required lubricant by rolling over the opening. The lubricant reservoir is provided with a corresponding opening which can provide a required amount of lubricant. An extension of the relubrication intervals which may possibly be achievable may depend on a storage volume of the relubrication unit. With a storage volume according to some embodiments, the current relubrication period z. B. at least be doubled.

In one embodiment, the element may be made of plastic and include a clearance for storing a corresponding amount of lubricant. Furthermore, it may be provided with an opening for dispensing the lubricant. For example, the element can be integrated in the car and mounted from below in the return. The dimensions of the car can remain unchanged.

Alternatively, the element can be placed on one side or on both sides of the car. The one-sided application may be advantageous for lateral mounting position.

To fill the lubricant reservoir can be filled via a syringe with the desired lubricant. For example, on the weight can be checked if the memory is filled with the necessary amount of fat.

The lubricating element may, for. B. used in the carriage assembly and refilled later. The lubricating element may alternatively be attached via an opening in the ball return. The attachment to the car can be done via positive locking or, for larger elements, via screwing on the car.

After consumption of the lubricant, the lubricant reservoir can be refilled or replaced, whereby a further relubrication over a long period of time can be made possible. Alternatively, a change can be omitted, and grease can be refilled through an opening on the car.

The relubrication element can be filled with factory-recommended or user-required greases or oils as a lubricant.

Embodiments may allow much longer relubrication periods, or even lifetime lubrication in some applications. A simple refilling or replacement of the element after lubricant consumption may also be possible. A lubricant supply can be done by embodiments even with an inaccessible installation of guides. According to an application different lubricants can be used. A design as a closed system can cause embodiments can also be used in clean rooms. In this case, in one embodiment, the relubrication elements are integrated in the car and can be refilled if necessary. In another embodiment, the relubrication elements are attached to the car and can be refilled if necessary or completely replaced. Some embodiments may be used with fixed-lot bearing assemblies. Here, a component to be moved, for. B. device or machine, for example, be stored on two rails over four profile rail cars. A seat of two profiled rail cars, which run on a common rail, on the component to be moved can be fixed, and a seat of the other two profiled rail cars can allow limited play in a direction perpendicular to the direction of travel.

According to a further aspect, embodiments relate to a method for lubricating a profiled rail car of a linear bearing. The method comprises mounting a lubricant dispenser such that a lubricant reservoir of the lubricant dispenser extends above a roller body channel of the profile rail car. The method also includes dispensing lubricant from the lubricant reservoir to rolling elements revolving in the rolling body channel via a lubricant supply located below the lubricant reservoir.

The embodiments described above are merely illustrative of the principles of the present invention. It will be understood that modifications and variations of the arrangements and details described herein will be apparent to others of ordinary skill in the art. Therefore, it is intended that the invention be limited only by the scope of the appended claims and not by the specific details presented in the description and explanation of the embodiments herein.

The features disclosed in the foregoing description, the appended claims and the appended figures may be taken to be and effect both individually and in any combination for the realization of an embodiment in its various forms.

LIST OF REFERENCE NUMBERS

100-1; 100-2; 100-3

linear bearings

105

Profile rail cars

110

lubricant dispensing

115

lubricant reservoir

120

rolling element

125

lubricant supply

130

rolling elements

135

approach surface

140

guide rail

145

profiling

150

deepening

155

fastener

155-1

Winkelblech

155-2

fastener

155-3

screw

160

passage

165

opening

170

head Start

175

cover

180

recess

185

threaded holes

Claims (10)

Profile rail car ( 105 ) of a linear bearing ( 100-1 ; 100-2 ; 100-3 ) comprising a lubricant dispenser ( 110 ), whereby the lubricator ( 110 ): a lubricant reservoir ( 115 ), which in the assembled state of the lubricant dispenser ( 110 ) above a rolling body channel ( 120 ) of the profile rail car ( 105 ) extends; and one below the lubricant reservoir ( 115 ) located lubricant supply ( 125 ), which is designed to be in the mounted state of the lubricant dispenser ( 110 ) Lubricant from the lubricant reservoir ( 115 ) in the rolling element channel ( 120 ) rotating rolling elements ( 130 ). Profile rail car ( 105 ) according to claim 1, wherein the lubricant supply ( 125 ) is adapted to a backflow of lubricant from the rolling elements ( 130 ) into the lubricant reservoir ( 115 ) to prevent. Profile rail car ( 105 ) according to one of the preceding claims, wherein the lubricant supply ( 125 ) is adapted to remove lubricant from the lubricant reservoir ( 115 ) by an influence of gravity on the lubricant to the rolling elements ( 130 ). Profile rail car ( 105 ) according to one of the preceding claims, wherein the lubricant dispenser ( 110 ) along a guide rail ( 140 ) seen between two deflection regions of the rolling body channel ( 120 ) is arranged. Profile rail car ( 105 ) according to one of the preceding claims, wherein the lubricant dispenser ( 110 ) a contact surface ( 135 ), which is adapted to the Wälzkörperkanal ( 120 ) at least partially, so that the plurality of rolling elements ( 130 ) at the contact surface ( 135 ), wherein the lubricant supply ( 125 ) at the contact surface ( 135 ) opens. Profile rail car ( 105 ) according to one of the preceding claims, wherein the lubricant dispenser ( 110 ) a section of the Wälzkörperkanals ( 120 ) along a running direction of the rolling elements ( 130 ). Profile rail car ( 105 ) according to one of the preceding claims, wherein the lubricant dispenser ( 110 ) further comprises a valve which in the assembled state of the lubricant dispenser ( 110 ) is freely accessible and into the lubricant reservoir ( 115 ) opens. Profile rail car ( 105 ) according to one of claims 1 to 5, wherein the lubricant dispenser ( 110 ) a lead ( 170 ), wherein the projection ( 170 ) is formed, with a recess on the profiled rail car ( 105 ) make a snap connection. Profile rail car ( 105 ) according to any one of the preceding claims, further comprising a recess ( 150 ) for receiving the lubricant dispenser ( 110 ), which the rolling body channel ( 120 ) at least partially overlaps. Profile rail car ( 105 ) according to claim 9, wherein the depression ( 150 ) related to a direction of travel of the profile rail car ( 105 ) so laterally from one for receiving a guide rail ( 140 ) provided recess ( 180 ) of the profile rail car ( 105 ) is located after insertion or removal of the lubricant dispenser ( 110 ) a dimension of the profile rail car ( 105 ) does not change in or against the direction of travel.

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