CN110953470A

CN110953470A - Lubricant distributor and cavity lubricating device

Info

Publication number: CN110953470A
Application number: CN201910411518.7A
Authority: CN
Inventors: M.赫克特; P.霍普; J.克鲁茨坎佩尔; H.施密特; D.舍恩赫尔
Original assignee: SKF Lubrication Systems Germany GmbH
Current assignee: SKF Lubrication Systems Germany GmbH
Priority date: 2018-09-26
Filing date: 2019-05-17
Publication date: 2020-04-03
Anticipated expiration: 2039-05-17
Also published as: DE102018216483A1; CN110953470B

Abstract

The invention relates to a lubricant distributor, which has the following technical characteristics: -at least one housing element, -a lubricant distribution element rotatably arranged relative to the housing element, -a sensor unit configured to be able to detect a rotation of the lubricant distribution element relative to the housing element.

Description

Lubricant distributor and cavity lubricating device

Technical Field

The invention relates to a lubricant distributor and a cavity lubricating device with the lubricant distributor.

Background

Lubricant dispensers are known in various embodiments. There is a lubricant dispenser in which lubricant, usually oil or grease, is released from a central reservoir to different lubrication points through a line system. On the other hand, lubricant distributors are also known which are equipped in particular for applying lubricant to the inside of the hollow body as uniformly as possible. This allows, for example, the lubrication of the insides of cylinders, tubes, rings, internal threads and other, in any case only, cylindrical cavities or hollow bodies. One embodiment of a rotary lubricant distributor of this type is a so-called rotary oilcan, in which a rotary lubricating head is arranged in a cavity. A channel system is formed in the lubricating head, into which oil or another lubricant with flow properties is introduced and which is thrown out of the lubricating head in view of the centrifugal force and thus reaches the inner wall of the cavity. The lubricating head is then moved axially into or out of the hollow body, so that the desired inner surface is wetted with oil. The channel system can be formed by a through-opening extending in the radial direction in the case of a simple construction of the system, but can also have a complex geometry.

In the known embodiment, the lubricating head is cup-shaped, that is to say has a cylindrical wall and a substantially circular base plate. The lubricating head surrounds the housing with a wall, from the end side of which the shaft projects, the lubricating head being held on the shaft. Alternatively, the wall may merely surround a shaft which projects from the housing. The shaft is in turn rotatably supported in a housing and can be caused to rotate by means of a drive. Usually in this case several thousand revolutions per minute. Starting from the inner side of the floor or wall, a plurality of channels are arranged, which extend to the end of the radially outer side. In the known embodiment, the oil is introduced into the lubricating head by means of an external application device.

Disclosure of Invention

Many known constructions of rotary oilers have limited operability and applicability due to structural limitations. The object of the present invention is to provide a further improved lubricant distributor.

The technical problem is solved by the preferred embodiments of the present invention. Accordingly, a lubricant distributor is provided, which has the following technical features:

-at least one housing element which is,

-a lubricant distribution element rotatably arranged with respect to the housing element,

a sensor unit, which is designed to be able to detect a rotation of the lubricant dispensing element relative to the housing element.

In many applications, visual monitoring of the lubricant distributor element during operation is not possible. This may occur, for example, in an automated system or when the lubricant dispensing element enters a cavity that is not visible from the outside. It is therefore advantageous to be able to monitor the correct function of the lubricant dispensing element by means of the already provided sensor unit. By implementing the sensor unit as a rotary sensor unit, a plurality of possible failure modes can be monitored simultaneously. For example, the drive motor may fail and the lubricant dispensing element does not rotate despite the power input, which will be detected by the sensor unit. Furthermore, the lubricant distributor element may lose its connection to the electric machine because the fastening, for example on the shaft, is loose. Furthermore, a sensor unit is arranged here, so that no correct rotation of the lubricant dispensing element occurs. In both cases maintenance operations are required. Preferably, the lubricant distributor has a shaft which is rotatably arranged in the housing element and on which the lubricant distributor element is held, wherein the shaft is connected to the drive and can be caused to rotate by the drive.

In a preferred embodiment of the invention, the sensor unit has the following features:

-a sensor arranged on the housing element,

at least one signal generator arranged on the lubricant distribution element,

the lubricant dispensing element is designed in such a way that the lubricant dispensing element is able to be moved in a defined manner in the lubricant supply line.

This embodiment is particularly simple and therefore not prone to error. A variety of sensors and signal types may be used.

A particularly preferred embodiment of the invention comprises at least one second signal generator which is arranged on the lubricant distributor element such that at least one different signal can be generated in the sensor once per revolution of the lubricant distributor element. This enables a better sensor signal to be formed, which can be evaluated simply and reliably.

In a preferred embodiment of the invention, the sensor is designed as a magnetic sensor, in particular as a hall sensor, and the one or more signal generators are designed as permanent magnets. This type of component is robust and inexpensive, and furthermore enables a compact embodiment. This enables a reliable and compact lubricant distributor to be provided. Preferably, the lubricant distributor element has a base body in which one or more signal generators are embedded.

In a preferred embodiment of the invention, the lubricant distributor element and the housing element are embodied and arranged, and the sensor and the one or more signal generators are arranged on the lubricant distributor element or the housing element, such that in the respective angular position of the lubricant distributor element the signal generators are at a minimum distance from the sensor. Further preferably, the sensor and the one or more signal generators are arranged at the same radial distance from the axis of rotation of the lubricant distribution element. This makes it possible to generate a reliably detectable signal in the sensor in a simple construction and to implement the lubricant distributor particularly compactly.

In a preferred embodiment of the invention, the two permanent magnets are arranged such that, with regard to the position of the sensor, the magnetic fields of the permanent magnets are oriented opposite one another. This means, for example, that one of the permanent magnets points with its north pole in the axial direction in the direction of the sensor, compared to the other permanent magnet pointing with its south pole in the direction of the sensor. The permanent magnets in the magnetic sensor thus form signals of different signs and the same magnitude in the sensor, thereby improving the signal-to-noise ratio and forming a sensor signal that can be evaluated particularly well. Preferably, the permanent magnets or the signal generators as a whole are arranged opposite one another and radially spaced apart from one another with respect to the axis of rotation of the lubricant distributor.

Another preferred embodiment of the invention provides a cavity lubricating device for lubricating the inner surface of a substantially cylindrically shaped hollow body with a lubricant distributor according to any one of claims 1 to 9. Hollow bodies of this type can be shaped, for example, cylindrically or substantially cylindrically, but can also have other geometric shapes, for example, rectangular, 4-sided, 6-sided or oval.

Other preferred embodiments of the present invention have the following technical features:

-at least one sealing surface element,

-a lubricant distribution element for distributing lubricant to the lubricant reservoir,

-wherein the sealing surface element and the lubricant distribution element are arranged such that a gap is formed between the sealing surface element and the lubricant distribution element,

-at least one sealing element arranged in a sealing manner in the gap.

The known lubricant distributor has an annular gap between an inner wall of the lubricant distributor element and an outer wall of the housing, for example, which gap can be of different sizes depending on the embodiment. This is of no consequence in the usual applications, i.e. in the case of a rotating, downwardly directed lubricating head, since the latter in most cases throws oil and other lubricants with flow properties into the feed channel or through-holes of the oil when it comes into contact with the lubricating head and throws it out. For a stationary lubrication head, any remaining oil can flow out through the same channel. However, the lubricant distributor according to the embodiment of the invention allows an operation in which the lubricant distributing element is directed upwards or sideways. Lubricant that may enter down into the gap is then stopped by the seal on the outlet of the lubricant distribution element. The same applies to the storage of lubricant distributors which are not in operation. In this respect, position-independent operation and position-independent storage can be achieved in the non-rotating lubricant distributor element without an uncontrolled discharge of lubricant from the distributor.

In a preferred embodiment of the invention, the sealing surface element is embodied as a housing element. Further embodiments are possible in which the shaft itself acts as a sealing surface element.

In a preferred embodiment of the invention, the lubricant distributor element has a groove in which the sealing element is held. This makes it possible to reliably fix the sealing element in a simple manner while the embodiment is compact.

In a preferred embodiment of the invention, the housing element has a groove in which the sealing element is held. Thereby achieving the same advantages.

In a preferred embodiment of the invention, the sealing element is embodied as a groove sealing ring. The groove sealing ring can be obtained as a component in various embodiments and can be applied securely and reliably.

In a preferred embodiment of the invention, the groove sealing ring has the following technical features:

-a base body of annular shape, which,

a side extending substantially axially from the base body, said side being configured for resting on a groove bottom of the groove,

a lateral edge extending obliquely with respect to the axial direction from the base body, which lateral edge has a sealing edge which is designed to bear against a sealing surface of the sealing element which at least partially delimits the gap.

The corresponding embodiment is particularly compact, since the groove sealing ring can be embodied particularly narrowly.

In a preferred embodiment of the invention, the sealing element is made at least partially of NBR (nitrile rubber), polyurethane, FPM (fluoro rubber), VMQ (methyl vinyl silicone rubber) or PTFE (polytetrafluoroethylene).

In several known embodiments, the lubricant inlet is embodied in a lubricant distributor element of generally cup-shaped design, so that the lubricant is introduced into the rotating lubricant distributor element from diagonally behind by means of an injector. The syringe is designed as a separate structural unit and must be held manually or fastened to the housing element from the outside. Preferably, the lubricant distributor comprises at least one lubricant line, through which lubricant can be conducted to the lubricant distributor element. In a further preferred embodiment of the invention, the at least one lubricant line is embodied as a lubricant duct extending in the housing element. This can provide a particularly strong, simple and compact unit, since the lubricant inlet extends in the housing itself. The operation is significantly simplified and is substantially automated according to embodiments.

The preferred embodiment of the invention also comprises the following technical features:

the lubricant distributor element and the housing element are embodied and arranged such that a cavity is formed between the lubricant distributor element and the housing element, which cavity is in the transition to the gap, into which cavity lubricant can be introduced via a lubricant line, and

at least one lubricant distribution channel is formed in the lubricant distribution element, into which lubricant located in the cavity can be introduced,

the lubricant distribution channel is designed such that, by rotation of the lubricant distribution element, lubricant present in the lubricant distribution channel can be discharged from the lubricant distribution element.

This makes it possible to provide a robust unit with which the lubricant can be distributed particularly uniformly. The lubricant distribution channel is designed in such a way that the lubricant is distributed within the lubricant distribution element only by the centrifugal force caused by the rotation. The lubricant distribution channel is designed such that the lubricant is discharged from the cavity by centrifugal force into the lubricant distribution channel and subsequently out.

Drawings

Further advantages, features and details of the invention are given in the following description of embodiments of the invention with the aid of the drawings. In the drawings:

figure 1 shows a lubricant dispenser according to one embodiment of the invention,

figure 1a shows an enlarged view of a part of the region of the lubricant distributor according to figure 1,

FIG. 1b shows an enlarged view of a partial region of the lubricant distributor according to FIG. 1, and

fig. 2 shows a further sectional view of a partial region of the lubricant distributor according to fig. 1.

Detailed Description

Fig. 1 shows a lubricant distributor embodied in the form of a rotary lubricator 1 as a preferred embodiment of the invention. The spincoater 1 has a plurality of different interconnected components. The drive unit 3, the lubricant feed unit 5, the connecting unit 7, the bearing unit 9, the receiving unit 11 and the lubricating unit 13 are referred to herein. The various components are described in detail with reference to the following figures.

Fig. 1a shows an enlarged view of a partial region of the rotary lubricator 1 according to fig. 1. The drive unit 3 comprises a housing 21, which is closed with a housing cover 22 by means of bolts 23. In the selected sectional view, only two of the bolts 23 are shown. A motor 24 is arranged in the housing 21. Opposite the housing cover 22, the lubricant feed unit 5 is connected to the housing 21 by means of screws 23', only one of which is shown in the selected sectional view. In the lubricant feed unit 5, a connection 31 is provided to which a lubricant feed device, not shown here, in the form of an oil tank, an oil pump or another oil line can be connected. The lubricant passage 32 leads from the joint 31 to a coupling 33 sealed by an O-ring.

The connection unit 7 is fixed to the lubricant introduction unit 5 by means of a bolt 23 ". The connection unit comprises an elongated housing 41, the length of which varies depending on the embodiment of the lubricator 1, i.e. can be made longer or shorter, and is only partially shown in fig. 1 a. Said length substantially determines the distance between the drive unit 3 and the lubricating unit 13. A lubricant pipe 48 is provided in the lubricant feed unit 5, the length of which is adapted to the housing 41. A lubricant tube 48 is arranged in the coupling 33 and serves to convey lubricant from the lubricant duct 32 to the bearing unit 9. Furthermore, the connection unit 7 comprises a shaft 44, which is coupled to a shaft end (wellenstemmel) 25 of the electric motor 24 by means of a spring 46. The spring 46 can transmit torque from the shaft end 25 to the shaft 44 and cause the shaft to rotate. The length of the shaft 44 is adapted accordingly to the length of the connection unit 7. Furthermore, the connection unit 7 comprises a bolt 47, which is held in the receptacle 34. The connection unit serves for fixing the support unit 9, which is explained in connection with fig. 1 b.

Fig. 1b shows an enlarged view of a further part of the region of the rotary lubricator according to fig. 1. The support unit 9 comprises a housing 51 having the same diameter as the housing 41, but also a section 52 having a smaller diameter, so that the two

housings

41 and 51 can be nested in one another and fixed to one another in the radial direction. Adjacent to this is a receiving unit 11 which is screwed from itself with a screw 23' ″ to the housing 51. At the end of the lubricator 1 there is a lubricating unit 13, the structure and function of which is shown in detail according to fig. 2.

Two roller bearings 52 are held in the support unit 9, which rotatably support the shaft 53. Alternatively, embodiments with one roller bearing or more than two roller bearings, or even sliding bearings are also possible. The end of the shaft 53 on the right in the drawing extends through the accommodating unit 11 and protrudes outward at its end. The lubricating unit 13 and the shaft 53 are here connected to each other. For this purpose, the shaft 53 has a cylindrical through-opening 63 at the end, which is adapted to a through-opening 64 in the base body 61 of the lubricating unit 13. The bolt 65 is screwed into a thread 66 partially formed in the through hole 64, thereby fixing the base body 61 at the end of the shaft 53. Alternatively, a safety pin or a spring may be provided instead of the bolt 65. The length of the through-opening 64 is adapted to the dimensions of the screw 65 so that no unbalance is formed, i.e. a rapid rotation of the base body 61 is not adversely affected by geometric asymmetry. Furthermore, two radially encircling grooves 67 are formed at one end of the shaft 53, in each of which a rubber ring 68 is arranged. The rubber ring 68 is larger in diameter than the depth of the groove 68 so that the rubber ring easily protrudes from the groove. The rubber rings 68 form a functional connection with corresponding through-holes 69 of the basic body 61 and a seamless connection and centering is achieved.

The shaft 53 has a flattened end 54 at the other end, which engages in the shaft 44, which has a flattened receptacle 43 at the respective end. Alternatively, the end 54 may have another geometry, such as a hexagonal shape, to enable torque transmission. As described above in connection with fig. 1a, the shaft 44 is connected to the shaft end 25 of the motor 24. Once the motor 24 causes the shaft end 25 to rotate, the rotation is transmitted through the spring 26 to the shaft 44 and through the trimmed end of the shaft 44 to the shaft 53. The lubricating unit 13 is also caused to rotate by the shaft 53. For fixing the bearing unit 9, a thread 55 for the bolt 47 is provided. As described above, the screw is introduced through the receptacle 34 into the lubricant inlet unit 5 and screwed into the thread 55 of the bearing unit 9, whereby the bearing unit is tensioned in the axial direction relative to the connecting unit 7 and is thereby fixed. This provides a simple, stable and length-variable rotary lubricator which can be changed by exchanging the coupling unit 7.

Opposite the bolt 47, a lubricant tube 48 is arranged. The coupling 33 is connected to a lubricant duct 56 in the bearing unit 9. The lubricant passage 56 is connected to a lubricant passage 62 in the housing unit 11. The lubricant duct 62 extends first in the outer region of the receiving unit 11 and then extends obliquely outward, leaving the illustrated sectional view. The lubricant duct extends radially further inwards in a section 60 of the receiving unit 11 with a smaller diameter (shown by a dashed line). The lubricant can be delivered from the joint 31 to the lubrication unit 13, which is described in detail in fig. 2.

Fig. 2 shows a sectional view of the receiving unit 11 and the lubricating unit 13 in a position rotated relative to fig. 1 and 1 b. A cavity 70 is formed between the receiving unit 11 and the lubricating unit 13 by the cup-shaped base shape of the base body 61 of the lubricating unit 13 and of the partial rim of the receiving unit 11. The lower region of the receiving unit 11 only shows schematically the subsequent course of the lubricant duct 62, which has an open end 69 at the end of the receiving unit 11. Through this open end 69, lubricant, in this example oil, can be fed into the cavity 70. The smaller distance between the end 69 and the opposite base body 61 brings the oil into contact with the wall 71 of the lubricating unit 13. The introduction of oil is only carried out when the rotary lubricator is in operation, i.e. when the base body 61 is rotated relative to the receiving unit 11. By the centrifugal forces acting, the oil is distributed evenly over the wall 71 and is transported radially outwards. The base body 61 has two radially outwardly disposed, obliquely outwardly extending lubrication channels 72 which terminate at openings 73 in the base body 61 radially outwardly. It is also possible to construct more lubrication channels in the circumferential direction of the basic body 61, for example a total of four or six lubrication channels.

In view of the oblique extension of the lubrication channel 72 and the centrifugal forces acting, the oil is transported further along the lubrication channel 72 and is released outwards through the openings 73. This makes it possible to uniformly coat the component, for example, the inner side of the cartridge, with oil. The rotary lubricator 1 is moved axially for this purpose during the application of oil.

In the usual use case of the known rotary lubricators, the lubricating unit 13 is directed downwards, so that the oil is additionally drawn downwards by gravity. The base body 61 has an open end 75 in view of its cup-shaped design in construction. An annular gap 78 is formed between the inner wall 76 of the base body 61 and the opposite wall 77 of the section 60. If the spincoater is turned off, oil will remain in the cavity 70 and lubrication passage 72 at all times. When the lubricating unit 13 is directed downwards, the oil remains there and is thrown out at the next use. However, if the lubricator is supported so that the lubricating unit 13 faces upwards or sideways, the lubricant flows in the direction of the open end 75 towards the annular gap 78 and in the known embodiment out of the lubricator, this can lead to contamination. In order not to allow residual oil from the cavity 70 to pass through the annular gap 78 to the open end 75 and thus to the environment, a groove sealing ring 79 is arranged in the annular gap 78. The groove sealing ring is made, for example, of Nitrile Butadiene Rubber (NBR) or other known sealing materials, such as elastomers, PTFE or fluorinated elastomers. The groove sealing ring 79 has an annular base element 80, on which an axially extending seal 81 abuts. The seal is axially retained in a groove 82 of a correspondingly given size in the base body 61. Oppositely, a sealing element 83 extending at an angle is arranged on the base element 80, at the end of which a sealing edge 84 is formed. The sealing edge is arranged sealingly against the wall 77 after installation, so that no oil can escape from the cavity 70. In this way, the lubricator 1 can be supported in any position when not in operation, i.e. it is not possible to let oil out even with the upwardly directed lubricating unit 13. On the other hand, the groove seal ring 79 prevents the intrusion of foreign matter into the cavity 70.

In contrast to the embodiment of fig. 2, the arrangement of the groove sealing ring 79 can also be adjusted radially, i.e. the groove can be formed in the wall 77, while the groove sealing ring 79 can be held in the groove and sealed with the sealing edge against the wall 76.

Instead of the groove sealing ring 79, other sealing types, such as a radial shaft seal or a labyrinth seal, may also be provided in alternative embodiments.

By also showing the sensor 90 in fig. 2, it is arranged on the end of the containing unit 11 and protrudes into the cavity 70. The sensor 90 is embodied, for example, as a hall sensor, i.e. can detect a changing magnetic field. In the base body 61 of the lubricating unit 13, the cylindrical first magnet 91 is arranged flush with the wall portion 71. In the drawing of fig. 2, the first magnet is positioned oppositely with respect to the sensor 90. The magnet 91 is fixed to the base body 61 by an adhesive. For assembly, adhesive is applied in the respective recess 92 of the lubricating unit 13 and the magnet 91 is pressed into the recess 92. In order to allow excess adhesive to be transferred, the groove 92 continues into the channel 93, which is then closed by the penetrating adhesive. During a rotation of the lubricating unit 13 relative to the receiving unit 11, the magnet 91 is located in the position shown once per revolution, so that the sensor 90 is only temporarily in the magnetic field and thus forms a corresponding sensor signal. The resulting periodically varying sensor signal is processed in an evaluation unit 95 and is transmitted via a signal line 96 to a control unit 96, which is arranged in the drive unit 3 (see fig. 1 a). For this purpose, the signal line 96 extends through the bearing unit 9, the connecting unit 7, the lubricant feed unit 5 and the drive unit 3 via a plurality of sections that can be connected to one another.

A further magnet 97 is arranged in the base body 61 of the lubricating unit 13, which further magnet is diametrically opposite the magnet 91. This is achieved in that the sensor signal changes twice per revolution of the lubricant unit 13. The magnet 97 is held on the base body 61 by an adhesive similarly to the magnet 91. In order to vary the signal-to-noise ratio, the magnets 91 and 97 are arranged opposite one another with respect to their magnetic field, i.e. for example in the view of fig. 2 the magnet 91 has its north pole arranged to the left and the magnet 97 has its north pole arranged to the right. Thus, in the sensor 90, a positive signal is triggered once per revolution of the lubricating unit 13 and a negative signal of the same value is triggered once. The signal curve can be evaluated particularly reliably. Furthermore, it can also be determined by evaluating the signal that the lubricating unit 13 is still on the shaft 53, i.e. is not loose, and that the lubricating unit 13 is actually rotating. If no signal is detected by the sensor 90, a problem with the lubricating unit 13 or the motor 24 can be inferred, since the lubricating unit 13 either does not rotate or even does not exist at all. In both cases corrective intervention is required. The control unit 26 continues to signal the corresponding processing to the operating units, not shown, on which correct and fault states are shown during operation. Furthermore, the current rotational speed of the lubricating unit 13 can be detected by evaluating the sensor signal.

The components shown in the figures are partially illustrated in the device for the sake of clarity, and can also be arranged differently from one another in the actual embodiment. The operating principle on which the components are based does not necessarily have to be changed accordingly. Furthermore, the aspects of the embodiments shown here can also be solved differently in terms of construction, without the advantages of the invention having to be dispensed with.

In alternative embodiments, the lubricating unit 13 may have a larger or smaller diameter than shown here in order to be adapted to different application situations. In a typical embodiment use is made of a lubrication unit 13 having an outer diameter of between 20 and 80 mm. The diameters of the remaining components need not be changed here. A modular assembly can be provided in which connecting units 7 of different lengths and lubricating units 13 of different sizes can be individually assembled while using as many of the same components as possible.

List of reference numerals

1 rotating oil pot

3 drive unit

5 Lubricant introducing Unit

7 connecting unit

9 support unit

11 accommodating unit

13 lubrication unit

21 casing

22 casing cover

23. 23 ', 23 ", 23'" bolt

24 electric machine

25 shaft end

26 control unit

31 connector

32 lubricant passages

33 coupler

34 accommodating part

41 casing

43 accommodation part

44 shaft

46 spring

47 bolt

48 lubricant tube

51 casing

Section 52

53 shaft

54 end portion

55 thread

56 lubricant channel

60 section

61 basic body

62 lubricant channel

63. 64, 69 through hole

65 bolt

66 screw thread

67 groove

68 rubber ring

70 cavity

71 wall part

72 lubrication channel

73 is perforated

75 end part

76. 77 wall section

78 annular gap

79 groove sealing ring

80 base element

90 sensor

91. 97 magnet

92 groove

93 channel

Claims

1. A lubricant dispenser having the following technical features:

-at least one housing element which is,

2. The lubricant distributor according to claim 1, further having a shaft rotatably arranged in the housing element, the lubricant distributing element being held on the shaft, wherein the shaft is connected to and can be set in rotation by the drive.

3. The lubricant distributor according to claim 1 or 2, wherein the sensor unit has the following technical features:

-a sensor arranged on the housing element,

at least one signal generator arranged on the lubricant distribution element,

4. The lubricant distributor according to claim 3, further comprising at least one second signal generator arranged on the lubricant distributing element such that at least one further signal can be formed in the sensor once per revolution of the lubricant distributing element.

5. The lubricant distributor according to claim 3 or 4, wherein the sensor is configured as a magnetic sensor, in particular as a Hall sensor, and the one or more signal generators are embodied as permanent magnets.

6. The lubricant distributor according to claim 3, 4 or 5, wherein the lubricant distributing element has a base body in which one or more signal generators are embedded.

7. The lubricant distributor according to any one of claims 3 to 6, wherein the lubricant distributor element and the housing element are embodied and arranged, and the sensor and the one or more signal generators are arranged on the lubricant distributor element or the housing element such that in the respective angular position of the lubricant distributor element the signal generators are at a minimum distance from the sensor.

8. The lubricant distributor according to any preceding claim, wherein the sensor and the one or more signal generators are arranged at the same radial spacing relative to the axis of rotation of the lubricant distribution element.

9. The lubricant distributor according to any one of claims 5 to 8, wherein two permanent magnets are arranged such that the magnetic fields of the permanent magnets are oriented opposite to each other with respect to the position of the sensor.

10. A cavity lubricating device for lubricating an inner surface of a hollow body, having a lubricant distributor according to any one of claims 1 to 9.