CN106164516A - Bearing device with retainer - Google Patents

Abstract

The invention relates to a bearing device which meets requirements with regard to assembly, transport and functional properties, the bearing device comprising a cage (2) and a plurality of rollers (3), wherein the rollers (3) are arranged in the cage (2) in a manner which prevents them from falling out, wherein the cage (2) comprises a receiving section (7) for receiving the rollers and at least one locking element (6) for locking the receiving section (7), wherein the receiving section (7) and the at least one locking element (6) are connected to each other.

Description

Bearing unit with cage

technical field

The invention relates to a bearing arrangement having a cage and a plurality of rollers, wherein the rollers are arranged in the cage in a fall-proof manner.

Background technique

Rolling bearings generally have a plurality of rolling bodies via which two bearing partners can roll relative to each other. Due to the large number of rolling elements in rolling bearings, the requirement to fit the correct number of rolling elements in rolling bearings already arises during assembly. This requirement can be simplified, for example, by using a cage with individual receptacles for rolling bodies, since it is possible to control in a relatively simple manner whether each individual receptacle is filled with rolling bodies. Additional requirements arise when rolling bearings are transported, since the rolling elements can fall if they are not arranged in the rolling bearing in a self-retaining manner or in a manner that prevents them from falling out. Thereafter, the rolling bearings are generally no longer checked for the number of rolling elements during final assembly, and falling rolling elements can lead to incorrect assembly.

Document DE 967 539, which probably forms the closest prior art, describes a needle roller bearing for oscillating movements with needle rollers held and guided individually in a plastic cage. The special feature of this needle roller bearing is that the needle rollers are guided in a plastic cage with a full complement (vollrollig). This is achieved in this document in that the plastic cage is made of an elastic plastic material, wherein the needle rollers can be pressed into the elastic plastic cage.

Contents of the invention

The object underlying the invention is to provide a bearing arrangement which meets the requirements with regard to assembly, transport and functional properties.

This object is achieved by a bearing arrangement having the features of claim 1 . Preferred or advantageous embodiments of the invention result from the subclaims, the following description and the figures.

Within the scope of the present invention, a bearing arrangement is proposed which is designed in particular as a radial bearing arrangement. In particular, the bearing arrangement defines an axis of oscillation or rotation (generally referred to as the main axis).

The bearing arrangement has a cage and a plurality of rollers, wherein the rollers are arranged in the cage in a fall-proof manner, in particular in a self-retaining manner. In particular, a plurality of rollers in the cage are positively held by the cage in all directions, in particular radially inward, radially outward and axially in both directions. The cage has a plurality of receptacles, in particular a plurality of single receptacles or double receptacles, wherein in each case a single roller is arranged in a single receptacle and in each case two rollers are arranged in a double receptacle. The cage can be constructed in a single row or in multiple rows.

It is provided within the scope of the invention that the cage is formed from at least two separate parts. One of the parts is formed by a receiving section, which is designed to accommodate the rollers. The receiving section makes it possible, in particular, to place the roller in or onto the receiving section in the pre-assembled state. The receiving section can be constructed in multiple parts, but it is particularly preferred that the receiving section is designed in one piece. In particular, the receiving section is designed to receive all the rollers of the cage. It is preferably provided that the rollers are detachably held in the receiving section without at least one locking element, so that they can be inserted in a simple manner.

Furthermore, the holder comprises, as a further component or further components, at least one locking element which is designed to lock the receiving section. The locking is effected in that the roller is arranged in the cage in a fall-proof manner due to the locking of the receiving section by at least one locking element.

The receiving section and the at least one locking element are connected to each other in a locked state. Particularly preferably, the receiving section and the at least one locking element are positively connected to each other. It can optionally be added that, in addition to the form-fit connection, the receiving section and the at least one locking part can also be connected to one another in a material-fit and/or friction-fit manner. However, it is also possible for the receiving section and the at least one locking part to be connected to one another only in a form-fitting manner. In particular, the at least one locking element and the receiving section jointly form a plug-in device. In a modified embodiment, the receiving sections can also be connected to one another in a materially bonded manner, in particular by welding or gluing, and/or in a force-fit manner.

Whereas in the known state of the art the plastic cage has to be designed elastically in order to accommodate the rollers, it is proposed according to the invention that the cage is constructed in multiple parts and can be mounted via at least one supplementary connection. Assemble into a cage. The advantage of this configuration is that not only elastic plastics, which allow the rollers to be pressed into the cage, can be used as the basic material for the cage, but also any material, thus metal or also plastic , especially hard or bending-resistant plastics. The use of hard or bending-resistant plastics thus represents a preferred embodiment of the invention. The cage is in particular designed to be bending-resistant and/or dimensionally stable. In a preferred embodiment, the plastic cage or its parts comprising the receiving section and the at least one locking element can be produced simply and inexpensively, for example, by plastic injection molding. A safe and complete assembly is possible because the receiving section allows the rollers to be inserted. Locking with at least one locking element ensures that the rollers cannot fall off even during subsequent transport. Finally, a functional advantage is also obtained, since the cage (compared to the prior art) can be formed from a harder material and/or so that it is not easily deformed during operation of the bearing arrangement.

In a preferred refinement of the invention, the rollers are arranged in the cage with a full complement (also referred to as a full complement of needle rollers). In a full-complement arrangement, the rollers are preferably placed against one another in the circumferential direction around the main axis, so that a maximum number of rollers can be arranged in the circumferential direction. In particular, the sum of all free distances in the circumferential direction is smaller than the diameter of the rollers in the circumferential direction. Through the full-complement arrangement, the largest possible radial load-carrying capacity of the bearing arrangement is also achieved with a simultaneously space-saving design. The rollers each have their own axis of rotation, wherein all the axes of rotation define the pitch circle diameter of the rollers. In particular in the pitch circle diameter, the rollers are arranged directly adjacent to each other, in particular full complement.

In a preferred development of the invention, the rollers are designed as needle rollers. The needle rollers have a length-to-diameter ratio of preferably greater than 4:1, preferably greater than 6:1, and in particular greater than 8:1. Alternatively or additionally, rollers having a diameter of 5 mm or less are defined as needle rollers. Precisely in the case of needle rollers as rollers, it is unusual that these needle rollers are arranged in a full-complement arrangement in the cage. In a preferred design solution of the present invention, the cage is configured as a filigree cage A single receptacle is provided for each of the needle rollers in the filigree cage.

In a preferred design embodiment of the invention, the cage is designed as a shoe cage. The cage extends over an angular range of less than 360°, in particular less than 270°, in particular less than or equal to 180°. Such a pad-type cage is particularly preferably used in bearing arrangements for oscillating or pivoting movements. Alternatively or additionally, the bearing arrangement is designed as a shoe bearing, so that it extends in the circumferential direction over an angular range of less than 360°, in particular less than 270° and in particular less than or equal to 180°. Precisely in the case of pad cages or pad bearings, it is particularly dangerous for the individual rolling elements, especially the rollers, to fall off, since the pad cage may tend to deflect relative to the shell in the circumferential direction, As a result, the rolling elements may fall off. By means of the cage designed according to the invention as a fall-off protection, it is ensured that the rollers cannot fall off even in the case of a pad-type cage or a pad-type support.

In a possible alternative of the invention, the bearing arrangement is configured as a 360° bearing arrangement, which is equipped with more than one pad-type cage therein.

In a preferred design refinement of the invention, the receiving section is designed as a cage outer shell, and the at least one locking element is designed as a cage inner shell. The cage outer subshell and the cage inner subshell are arranged offset relative to one another in the radial direction relative to the main axis. In particular, the cage inner subshell and the cage outer subshell are arranged coaxially and/or concentrically to one another and/or to the main axis. The cage subshell has retaining means for positively locking the needle rollers against falling radially outwards. Conversely, the cage inner subshell has retaining means for positively locking the rollers against falling radially inwards. Furthermore, the cage subshell allows the rollers to be introduced into the region between the retaining means, thus simplifying the filling of the cage subshell with the rollers. By virtue of the form-locking connection of the outer cage subshell and the inner cage subshell, the rollers are accommodated in a fall-proof manner between the outer cage subshell and the inner cage subshell. Preferably, the cage outer shell additionally has an axial stop, for example a side ring section. As an alternative to this, side ring sections can also be formed in the cage inner subshell.

In a design embodiment of the invention, the holding means can be designed, for example, as a continuous web or web section. The embodiment in the form of a continuous web has the advantage that it reinforces the cage outer shell or the cage inner shell in terms of design. Conversely, it is also possible for the retaining means to be designed only as web segments or web heads, wherein the rollers are only held in sections in the longitudinal extension of the rollers. The web or the web section can have a friction-reducing contour. It is thus possible, for example, for the profile to have a circular cross section. The holding means are arranged in particular such that the rollers, in particular the needle rollers, are held in the cage with a full complement.

In a particularly preferred configuration of the present invention, the cage outer subshell and the cage inner subshell are latched or clamped to each other. In this way, a quick snap-in between the cage outer shell and the cage inner shell is provided, so that after the cage outer shell has been equipped, the cage inner shell can be easily inserted and locked or clipped.

In an alternative embodiment of the invention, the receiving section is designed as a cage subshell which in turn has a holding means, in particular in the form of a web or web section already described. Therefore, the receiving section is still configured for receiving the rollers for pre-assembly. Alternatively, the receiving section can also be designed as a cage inner subshell with holding means. At least one locking element is designed in multiple parts and includes a plurality of tabs which are inserted into the receiving section. For example, the side ring section of the receiving section has a through-opening into which the tab can be inserted in order to lock the receiving section.

In a preferred embodiment of the invention, the bearing arrangement has at least one bearing subshell, in particular a sheet metal subshell or bearing ring, wherein the bearing subshell or bearing ring carries raceways for the rollers. Particularly preferably, the bearing subhousing is designed as an outer bearing subhousing.

In a preferred development of the invention, the bearing subhousing, in particular the cage outer subhousing, is also connected to the cage in a detachment-proof manner. What is achieved by this refinement is that the cage is prevented from falling out of the bearing subhousing, for example during transport. Particularly preferably, the cage is accommodated in the bearing subhousing in a pivotable manner about the main axis, wherein on the one hand the cage is prevented from falling in a radial direction relative to the main shaft by the holding means in a form-locking manner, and On the other hand, the cage is prevented from pivoting out of the bearing subhousing in a form-locking manner by the end stop. Thus, an assembled, self-retaining structural component is advantageously formed.

In a possible application, the bearing arrangement is designed as a rocker arrangement, in particular a traction tensioning lever with a push rod for a brake or a hydraulic unit. The rocker arrangement comprises a rocker, wherein the rocker is supported via a cage of filling rollers. Particularly preferably, the bearing sub-housing is arranged stationary in the surrounding structure, and the rocker is pivotably supported relative to the surrounding structure via a cage filled with rollers.

Description of drawings

Additional features, advantages and effects of the invention emerge from the description of preferred exemplary embodiments of the invention and from the drawings. in:

FIG. 1 shows a three-dimensional exploded view of a bearing arrangement with a plastic cage as an exemplary embodiment of the invention.

detailed description

FIG. 1 shows a bearing arrangement 1 which is designed as a centripetal bearing and thus defines a main axis. The bearing arrangement 1 can be used, for example, to support a rocker, not shown, which can be pivoted via the bearing arrangement relative to a surrounding structure, not shown likewise.

The bearing arrangement 1 comprises a cage 2 which is designed as a plastic cage, into which a plurality of needle rollers 3 as rollers can be inserted in two rows. The needle rollers 3 are each configured as straight cylinders and have a length in the axial direction that is greater than three times the diameter of the needle rollers 3 . The needle rollers 3 are each constructed identically in both rows. Furthermore, the bearing arrangement comprises an outer bearing subhousing 4 which provides a raceway 5 for the needle rollers 3 . The bearing arrangement 1 is configured as a pad bearing and is limited to an angular range of less than 180°. Cage 2 is also designed as a shoe-type cage.

The cage 2 comprises a cage inner subshell 6 and a cage outer subshell 7 , which can be positively connected to one another via locking connections 8 a, b. When assembling, the needle roller 3 is first put into the cage outer sub-shell 7, and in a subsequent step, the cage inner sub-shell 6 is pressed and the cage inner sub-shell is form-fitted with the cage outer sub-shell 7 locking. In the locked state, the needle rollers 3 are held in the cage 2 in a form-locking manner in a manner that prevents them from falling out.

The cage subshell 7 has side ring sections 9 a, b and an intermediate ring section 10 on both axial sides. The side ring sections 9a, b are each connected to the middle ring section 10 via webs 11, so that the side ring sections 9a and the middle ring section 10 pass through the side ring section 9a and the middle ring section 10 in the axial direction and via the two webs 11 in the circumferential direction. The two-row arrangement forms a single receptacle 12 for each needle roller 3 . The correct number of needle rollers 3 can be inserted into the cage outer shell 7 in a simple manner by means of the single receptacle 12 . The spacing of the webs 11 in the circumferential direction is selected in such a way that the needle rollers 3 are held in a form-locking manner in a manner that prevents them from falling out in the radial direction outwards. The needle rollers 3 are blocked in the axial direction by the side ring segments 9a, b or the intermediate ring segment 10 against falling out.

The cage inner subshell 6 has a similar structure with side ring sections 13 a , b and a central ring section 14 , which are connected in the same way via webs 15 . The webs 15 are spaced apart in the circumferential direction in such a way that the needle rollers 3 are positively locked radially inwardly against falling out.

After the cage outer subhousing 7 and the cage inner subhousing 6 have been locked, receiving pockets 12 are formed for each individual needle roller 3 , wherein exactly one needle roller 3 is arranged in each of these receiving pockets 12 . In the assembled state, the needle rollers 3 are arranged against one another in the circumferential direction in such a way that they are positioned in a full complement or full complement of needle rollers. In particular, the number and distribution of the needle rollers 3 in the circumferential direction are selected in such a way that the total length of all gaps between the needle rollers 3 is less than the pitch circle diameter determined by the axis of rotation of the needle rollers 3 diameter of. The maximum load carrying capacity of the bearing device 1 can be achieved by means of a full complement design. The radial positioning of the webs 11 or 15 is selected in such a way that a full-fill arrangement is possible. In order to reduce the frictional resistance, the webs 11 , 15 can be circular in cross section.

The cage 2 is formed from a dimensionally stable and/or flexurally resistant plastic, so that the cage inner subshell 6 and the cage outer subshell 7 can be joined to form a likewise dimensionally stable and/or flexurally resistant cage 2 .

The locking connections 8 a, b are arranged with respect to the circumferential direction on the free ends of the cage 2 and are formed by two positioning sections 17 a, b and positioning receptacles 18 a, b, wherein the positioning sections 17 a, b are located radially Oriented outwards and positively accommodated by the positioning receptacles 18 a , b during locking, and thereby ensuring the relative position of the cage inner subshell 6 relative to the cage outer subshell 7 . A locking tongue 19 is centrally arranged on the cage inner sub-shell 6 , which can be snapped into a locking receptacle 20 of the cage outer sub-shell, so that the cage inner sub-shell 6 and The cage outer subshells 7 are latched to each other.

The bearing subhousing 4 can be constructed from metal or plastic and has side edge pieces 21 a, b which guide the cage 2 in the axial direction. The pivoting movement of the cage in the circumferential direction is limited on both sides by an end stop 22a, b, an end web region jointly formed by the end web regions of the cage inner subshell 6 and the cage outer subshell 7 The segments can hit these end stops. The end stops 22a, b and the end web sections together form an end stop arrangement. The end stops 22a, b are designed as tongues of the bearing half-shells extending in the radial direction.

The advantages of the bearing arrangement 1 are, on the one hand, that the needle rollers 3 are held in the cage 2 in a fully filled and secure manner, and on the other hand, that the cage 2 can be assembled easily and, moreover, that the dimensionally stable cage 2 also has a good functional characteristics.

Furthermore, in order to prevent the retainer 2 from being loosened from the bearing sub-housing 4 during assembly or transportation, the retainer 2 is held in the bearing sub-housing 4 in a fall-proof manner. Falling in the axial direction is already prevented by side edge pieces 21 a, b, and falling in the circumferential direction is prevented by end stops 22 a, b. Furthermore, in order to prevent falling in the radial direction, the cage is held in the bearing subhousing 4 in a pivotable manner but in a form-fitting manner with respect to the radial direction. To this end, retaining lugs 23 are introduced into the side edge pieces 21a, b, for example in the form of stampings facing the cage 2 in the axial direction.

The cage inner subhousing 6 has, for each holding lug 23 , a guide section 24 extending in the circumferential direction and retracting in the axial direction, which can accommodate one of the holding lugs 23 in each case. The retaining lugs 23 are positively guided in the guide section 24 , so that a travel-limited movement in the circumferential direction is possible, but the cage 2 is prevented from falling off in the radial direction. The retaining lugs 23 and the guide sections 24 are dimensioned in such a way that the cage 2 can be pressed into the bearing subhousing.

In order to be able to reset the cage 2 in the circumferential direction relative to the bearing half-shell 4 during operation of the bearing arrangement 1, the cage 2 and, in this example, the cage inner sub-shell 6 have reset wings 25 which are formed on the side rings. The sections 13a,b extend over the side edge pieces 21a,b and in the axial direction.

List of reference signs

1 Bearing unit

2 cage

3 needles

4 Bearing half shells

5 raceways

6 Cage inner sub-shell

7 cage outer shell

8a, b Lock connection part

9a, b side ring segment

10 middle ring section

11 tabs

12 pocket

13a,b side loop segment

14 middle ring section

15 tabs

16 vacancies

17a, b positioning section

18a, b positioning housing

19 Locking tongue

20 lock housing

21a, b Side edge pieces

22a, b End stop

23 keep the protruding nose

24 Boot Sector

25 Reset Wing

Claims (10)

1. a bearing arrangement (1), described bearing arrangement has:

Retainer (2),

Multiple rollers (3), wherein, described roller (3) is arranged in described retainer (2) in the way of slip-off preventing,

It is characterized in that,

Described retainer (2) has the receiving section (7) for putting into described roller and is used for locking described receiving section (7) At least one locking piece (6), wherein, described receiving section (7) and at least one locking piece described (6) are connected to each other.

Bearing arrangement the most according to claim 1 (1), it is characterised in that be arranged in described guarantor the full dress of described roller (3) Hold in frame (2).

Bearing arrangement the most according to claim 1 and 2 (1), it is characterised in that described roller (3) is configured to needle-type rolling Son.

4. according to bearing arrangement in any one of the preceding claims wherein (1), it is characterised in that described retainer (2) constructs For tile type retainer, and/or described bearing arrangement (1) is configured to tile type supporting member.

5. according to bearing arrangement in any one of the preceding claims wherein (1), it is characterised in that described receiving section (7) structure Make as retainer exoperidium (7), and at least one locking piece described be configured to retainer in sub-shell (6), wherein, described holding Frame exoperidium (7) have for positive described roller (3) of blocking in case the maintaining body (11) that radially outward drops, and And in described retainer shell (6) have for positive described roller (3) of blocking in case the holding radially-inwardly dropped Mechanism (15).

Bearing arrangement the most according to claim 5 (1), it is characterised in that described maintaining body is configured to contact pin (11；15) Or it is configured to contact pin section.

7. according to the bearing arrangement (1) described in claim 5 or 6, it is characterised in that described retainer exoperidium (7) and described Sub-shell (6) kayser each other or clip in retainer.

Bearing arrangement the most according to any one of claim 1 to 3 (1), it is characterised in that described receiving section is configured to Retainer exoperidium (7) or sub-shell (6) in being configured to retainer, and at least one locking piece described is configured to multiple contact pin (11,15), described contact pin is placed in described receiving section.

9. according to bearing arrangement in any one of the preceding claims wherein (1), it is characterised in that have the sub-shell of bearing (4), its In, described retainer (2) is can swing and to be contained in the sub-shell of described bearing (4) in the way of slip-off preventing simultaneously.

10. according to bearing arrangement in any one of the preceding claims wherein (1), it is characterised in that as rocker actuator, described Rocker actuator has rocking bar and a peripheral structure, wherein, described rocking bar relative to described peripheral structure via the holding filling roller Frame (2) is supported in the way of swinging.