Radial piston compressor, and method for the assembly of a radial piston compressor

Abstract

A radial piston compressor, comprising a compressor unit (1) and a drive device (2) for driving the compressor unit, wherein the compressor unit (1) comprises at least one, preferably a plurality of piston-working chamber assemblies (13), which are arranged radially about an eccentric shaft (11, 12), wherein each piston-working chamber assembly (13) comprises a working chamber (131) having a piston (132) slidably received therein, wherein the piston (132) is driven by the eccentric shaft (11, 12), wherein the eccentric shaft (11, 12) is mounted rotatably by at least one bearing (3, 5) in a cylinder housing (16), wherein the at least one bearing (3, 5) is received in a bearing seat (31, 41, 51), wherein the cylinder housing (16) comprises at least one tool holder (WA1, WA2) for releasably attaching a tool (WZG I, WZG III) for the transmission of force. A method for mounting at least one bearing (3, 5) in a radial piston compressor for producing a radial piston compressor.

Description

[0001] Radial piston compressor, and methods for assembling a radial piston compressor

[0002] The present invention relates to a radial piston compressor according to the preamble of claim 1.

[0003] A radial piston compressor is a fluid power component. In contrast to an axial piston compressor, in this type of compressor at least one piston-working chamber assembly is arranged radially and perpendicular to the drive shaft. A radial piston compressor can also be referred to as a compressor based on the radial piston principle.

[0004] The piston's conveying or reciprocating motion is usually generated by an eccentric. Therefore, the drive shaft with the eccentric can also be referred to as an eccentric shaft. A radial piston compressor typically comprises several piston-working chamber assemblies that extend radially from the eccentric shaft in a star-shaped pattern.

[0005] A piston-work chamber assembly essentially comprises a working chamber, also called a cylinder or cylinder bore, and a piston that moves up and down within the working chamber. The piston has a central geometric axis that coincides with the piston's direction of movement. In a radial piston compressor with an eccentric shaft, the piston has a contact surface on its side facing the eccentric shaft. The eccentric disk contacts this surface during the rotation of the eccentric shaft. The eccentric shaft has an axis of rotation around which it rotates. When the eccentric disk contacts the contact surface, the piston moves upward, compressing the medium in the working chamber.

[0006] Radial piston compressors are used, for example, to compress refrigerant in the air conditioning systems of motor vehicles, especially in electric vehicles. A refrigerant such as CO2 can be used as the medium to be compressed. However, other media and refrigerants are also conceivable.

[0007] A radial piston compressor of the aforementioned type is known, for example, from DE 10 2020 211 680 Al. Here, for instance, two bearings are used to support the eccentric shaft in the housing. From patent application DE 10 2022 133 723 Al of the applicant, a radial piston compressor is known whose eccentric shaft is supported in the housing by three bearings. The bearings are preferably received in bearing seats which, together with the outer bearing ring, form an interference fit.

[0008] Therefore, a key aspect of the manufacturing of such radial piston compressors is the assembly of the bearings for the eccentric shaft inside the housing.

[0009] Bearings are typically press-fitted; the outer ring is pressed into a bearing seat in the housing. The press fit of the bearing must be reliable for all tolerance positions (rotating load). For example, IT 7 corresponds to an insertion force of approximately 6-8 kN. IT7 describes the tolerance for a dimension according to the ISO tolerance system. This system is a matrix of various dimension ranges and tolerance classes. The tolerance classes range from IT1 to IT18. For mass-produced parts in general mechanical engineering, tolerance classes IT7 to IT8 are achievable for fits with reasonable effort; in exceptional cases, IT6 is possible.

[0010] Furthermore, when pressing the bearing into the bearing seat, there is a risk of damage or deformation of the cylinder bore or the already assembled mechanism.

[0011] The present invention addresses this issue and aims to propose an improved radial piston compressor, in particular a radial piston compressor that overcomes, or at least mitigates, the problems outlined above. Specifically, the invention proposes a radial piston compressor that allows for improved assembly, particularly with regard to preventing damage when inserting the bearings into the housing, especially into the bearing seat. Furthermore, the invention proposes a radial piston compressor that minimizes the forces acting on the cylinder bore, the assembled pistons, or the piston mechanism during the bearing assembly process.

[0012] According to the invention, this problem is solved by a radial piston compressor with the characterizing features of claim 1. By providing the cylinder housing with at least one tool receptacle for the detachable attachment of a tool for force transmission, a suitable connection point is created on the cylinder housing to which a corresponding tool can dock in order to provide suitable fixation of the cylinder housing for bearing assembly purposes, in particular for supporting or dissipating the forces occurring during bearing assembly. In particular, it is provided that the tool receptacle is configured to receive and / or dissipate an assembly force and / or introduce a counterforce.

[0013] Further advantageous embodiments of the proposed invention arise in particular from the features of the dependent claims. The subject matter or features of the various claims can, in principle, be combined with one another in any way.

[0014] In an advantageous embodiment of the invention, the eccentric shaft can be mounted with a further bearing in a bearing seat in the cylinder housing, the cylinder housing comprising a further tool receptacle. It can be provided accordingly that each bearing to be mounted is assigned a tool receptacle which is optimally designed and arranged for the mounting of the respective bearing with regard to its expected force dissipation or force inflow.

[0015] In a further advantageous embodiment of the invention, the bearing may comprise an outer ring with which the bearing is received in the bearing seat by means of an interference fit. Preferably, the bearings used in the radial piston compressor are designed as roller bearings, so that their outer ring is received in the respective bearing seat.

[0016] In a further advantageous embodiment of the invention, the tool holder can be configured as an annular groove, recess, edge, projection, or as a corresponding "negative" surface, in particular circumferential, continuous, or segmented / interrupted. The aforementioned embodiments of the tool holder are particularly well suited to creating a suitable connection point on the cylinder housing to which a corresponding tool can dock, thus providing suitable fixation of the cylinder housing for bearing assembly purposes, in particular for supporting or dissipating the forces occurring during bearing assembly. In particular, it is provided that the tool holder is designed to receive and / or dissipate the assembly force and / or introduce the counterforce.

[0017] A further object of the present invention is to demonstrate an advantageous method for mounting at least one bearing in a radial piston compressor for the manufacture of a radial piston compressor.

[0018] According to the invention, this problem is solved by a method according to claim 6: a) Inserting a first tool into the at least one tool receptacle of the cylinder housing; a2) Applying a bearing to the eccentric shaft outside the cylinder housing and positioning the bearing in front of the associated bearing seat in the cylinder housing; a3) Applying a joining force to the bearing by means of a second tool for insertion into the bearing seat; a4) Applying a counterforce opposing the joining force via the first tool into the tool receptacle; a5) Inserting the bearing into the associated bearing seat.

[0019] A method is proposed in which the appropriate connection point on the cylinder housing is used to dock a corresponding tool, thereby providing suitable fixation of the cylinder housing for bearing installation purposes, in particular for supporting and dissipating the forces occurring during bearing installation. The risk of unintentional damage or deformation of the cylinder housing, especially the cylinder bore or the already installed mechanism, can be avoided or at least reduced when pressing the bearing into the bearing seat.

[0020] Further advantageous embodiments of the proposed invention arise in particular from the features of the dependent claims. The subject matter or features of the various claims can, in principle, be combined with one another in any way.

[0021] In a further advantageous embodiment of the proposed invention, it can be provided that the bearing, in particular the assembly consisting of the bearing (in this case the low-pressure bearing) and the eccentric shaft, is positioned in front of the associated bearing seat by the second tool. Accordingly, the second tool can have a dual function: applying a joining force on the one hand and acting as a positioning means on the other.

[0022] In a further advantageous embodiment of the proposed method for mounting an additional bearing in a radial piston compressor for manufacturing a radial piston compressor with an additional bearing, the following process steps may be provided: b) Inserting a third tool into an additional tool holder in the cylinder housing; b2) Positioning an additional bearing in front of the associated additional bearing seat in the cylinder housing; b3) Applying a joining force to the bearing by a fourth tool for insertion into the bearing seat; b4) Applying a counterforce opposing the joining force via the third tool into the additional tool holder; b5) Inserting the bearing into the associated bearing seat.

[0023] Finally, another bearing, in this case the HD bearing, is joined by the inventive method, whereby here not an assembly of bearing and eccentric shaft, but only a separate bearing was joined.

[0024] In a further advantageous embodiment of the proposed invention, it can be provided that the bearing is positioned in front of the associated bearing seat by the second tool.

[0025] In a further advantageous embodiment of the proposed invention, it can be provided that the piston, eccentric bearing, piston guide ring and / or transmission element are mounted before the mounting of the at least one bearing. Accordingly, the aforementioned components and also other components can already be pre-installed and the bearing(s) then mounted.

[0026] In a further advantageous embodiment of the proposed invention, it can be provided that, during the assembly of the at least one bearing, at least one further tool, in particular a fifth tool and / or a sixth tool, is brought into contact with the cylinder housing for radial and / or axial support of the cylinder housing. The aforementioned tools can further stabilize the cylinder housing during the assembly of the bearing(s). Further features and advantages of the present invention will become clear with reference to the following description of preferred embodiments and the accompanying figures.

[0027] Fig. 1 shows a radial piston compressor according to the prior art (with two bearings for the eccentric shaft) in a longitudinal section;

[0028] Fig. 2 shows a radial piston compressor according to the prior art (with two bearings for the eccentric shaft) in a cross-section (through the piston axes);

[0029] Fig. 3 shows a radial piston compressor according to the prior art (with three bearings for the eccentric shaft) in a cutaway side view;

[0030] Fig. 4 shows the assembly of a bearing in a cylinder housing according to the prior art (beginning);

[0031] Fig. 5 shows the assembly of a bearing in a cylinder housing according to the prior art (end);

[0032] Fig. 6 shows an eccentric shaft with rotor and bearing in a cutaway view;

[0033] Fig. 7 shows a cylinder housing of a radial piston compressor according to the invention in a perspective view;

[0034] Fig. 8 shows a detail of an embodiment of the cylinder housing with a tool holder;

[0035] Fig. 9 shows a cylinder housing of a radial piston compressor according to the invention in a perspective view;

[0036] Fig. 10 shows a detail of an embodiment of the cylinder housing with two tool holders; Fig. 11 shows a detail of an embodiment of the cylinder housing with one tool holder and inserted piston, eccentric bearing, transmission element and cylinder head;

[0037] Fig. 12 shows a detail of an embodiment of the cylinder housing with two tool holders and inserted piston, eccentric bearing, transmission element and cylinder head;

[0038] Fig. 13-13b Assembly steps for a method for assembling at least one bearing in a radial piston compressor, in particular a cylinder housing;

[0039] Fig. 14-14d Assembly steps for a method for mounting two bearings in one

[0040] radial piston compressor, in particular a cylinder housing;

[0041] Fig. 15-16b additional tools for the assembly of at least one bearing in a radial piston compressor, in particular a cylinder housing.

[0042] The following reference symbols are used in the illustrations:

[0043] D axis of rotation

[0044] K Piston axis

[0045] Fl joining force / assembly force

[0046] F2 Holding force or counter-force

[0047] K Force flow

[0048] KV power flow

[0049] 1 compressor unit

[0050] 2 Drive unit

[0051] 3 first bearing / bearing (HD bearing)

[0052] 4 second camp

[0053] 5 third bearing / bearing (ND bearing)

[0054] 6 High-pressure channel

[0055] 6' Section of the high-pressure channel 11 Drive shaft

[0056] 12 eccentric discs

[0057] 13 Piston working chamber assembly

[0058] 14 Piston guide ring

[0059] 15 Cylinder head / cylinder cover

[0060] 16 cylinder housings

[0061] 17 Cylinder housing covers

[0062] 21 Drive housings

[0063] 22 Rotor

[0064] 23 Stator

[0065] 31 bearing seat

[0066] 32 Outer bearing ring

[0067] 41 bearing seat

[0068] 42 Outer bearing ring

[0069] 51 bearing seat

[0070] 52 Outer bearing ring

[0071] 121 eccentric bearings

[0072] 131 Working space / cylinder bore

[0073] 132 pistons

[0074] 133 Transmission element / Swivel element

[0075] Wzg.l first tool (state of the art)

[0076] Tool 2, second tool (state of the art)

[0077] WZG I first tool

[0078] WZG II second tool

[0079] WZG III third tool

[0080] WZG IV fourth tool

[0081] WA1 first tool holder WA2 (additional) second tool holder

[0082] Features and details described in connection with a method naturally also apply to the device according to the invention, and vice versa, so that the disclosure regarding the individual aspects of the invention always makes or can make reciprocal reference. Furthermore, any described method according to the invention can be carried out with the device according to the invention.

[0083] The terminology used herein serves only to describe certain embodiments and is not intended to limit the disclosure. As used herein, the singular forms "a" and "the" are intended to include the plural forms unless the context otherwise makes clear. It will also be clear that the expressions "indicates" and / or "indicating," when used in this description, specify the presence of the aforementioned features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the expression "and / or" includes any and all combinations of one or more of the associated, listed elements.

[0084] First, reference is made to Figures 1 and 2.

[0085] A radial piston compressor essentially comprises a compressor unit 1 and a drive unit 2. The radial piston compressor includes a housing, which can be composed of individual housing components, such as, for example, in the present embodiment, a drive housing 21, a cylinder housing 16, and a cylinder housing cover 17. Other housing configurations are also conceivable.

[0086] The compressor unit 1 comprises a drive shaft 11 with an eccentric disc 12. The combination of drive shaft 11 and eccentric disc 12 can also be referred to as an eccentric shaft. The drive shaft 11 has a rotational axis D. The compressor unit comprises at least one piston-working chamber assembly 13, preferably several piston-working chamber assemblies 13, 13a, 13b... 13f, which are arranged radially around the drive shaft 11. The piston-working chamber assemblies 13 can also be described as having a star-shaped arrangement around the drive shaft 11. The piston-working chamber assembly 13 comprises a working chamber 131 with a piston 132 slidably arranged therein. The piston 132 has a piston axis K. The direction of displacement of the piston 132 corresponds to the piston axis K. The working chamber 131 can also be referred to as a cylinder or cylinder chamber. The working chamber 131 is equipped with a cylinder head 15 at the head end.The cylinder head can also be referred to as the cylinder cover. The working chambers 131 of the piston-working chamber assemblies 13 can be formed, at least partially, from the cylinder housing 16.

[0087] The drive shaft 11, in turn, can be set in rotation by the drive unit 2, which can, for example, be designed as an electric motor. As the drive shaft 11 rotates, the eccentric disk 12 engages the piston 132 and moves it within the working chamber 131, thereby compressing the medium in the working chamber, for example, a refrigerant. The return movement of the piston 132 can be effected, for example, by a piston guide ring 14 in contact with the piston 132. In this way, the piston 132 can be moved back to bottom dead center (BDC) until the eccentric disk 12 again engages the piston crown. The piston 132, in particular the piston crown, can also be equipped with a transmission element 133, or a transmission element 133 can be arranged between the eccentric disk 12 and the piston 132.The transmission element 133 transfers the stroke of the eccentric disc 12 to the piston 132, enabling the piston to perform the compression movement towards top dead center (TDC). The transmission element 133 can be made of a different material than the piston 132 and eccentric disc 12, particularly plastic. This can, for example, reduce wear or provide some damping when the eccentric disc 12 impacts the piston. The eccentric disc 12 can also be equipped with an eccentric bearing 121, particularly a needle bearing.

[0088] It is further evident that the eccentric shaft 11, 12 is rotatably mounted in the housing by means of bearings, in particular a first bearing 3 and a second bearing 4.

[0089] The further details and operation of a radial piston compressor are sufficiently known to those skilled in the art. For further details, reference can be made, for example, to DE 102020211 680 Al or DE 10 2022 133 723 Al.

[0090] Particular reference is made below to Fig. 3. Fig. 3 shows a section through a radial piston compressor according to the prior art. The illustration in Fig. 3 serves in particular to clarify the bearing position with regard to the high-pressure and low-pressure sides of the radial piston compressor. The high-pressure side is understood to be the area of ​​the radial piston compressor where the fluid is predominantly compressed. In contrast, the low-pressure side is understood to be the area of ​​the radial piston compressor where the fluid is uncompressed, or at least at a lower pressure than in the high-pressure area.

[0091] It is evident that the radial piston compressor depicted therein is equipped with a first bearing 3, a second bearing 4, and a third bearing 5, and that the eccentric shaft 11, 12 is supported in the housing by means of the aforementioned bearings. The bearings are received in associated bearing seats 31, 41, 51, preferably by press fit. The bearings 3, 5 are preferably rolling bearings, in particular ball bearings. The bearings also preferably each comprise an outer ring 32, 42, 52, with which they are press-fitted into the associated bearing seats 31, 41, 51.

[0092] The rotor 22, stator 23, housing 16, 17, 21, eccentric shaft 11, 12, bearings 3, 5, cylinder cover 15 or valves, piston 132 or piston mechanism are also visible. A high-pressure channel 6 is also shown.

[0093] The respective bearings can be identified based on their position relative to the high-pressure (HP) or low-pressure (LP) area. For example, the first bearing 3 can be designated as an HP bearing and the third bearing 5 as an LP bearing. It is particularly important to consider on which side of the eccentric 12 or the cylinder bore 131 the respective bearing is located. The bearing on the side of the cylinder housing 16 where the high-pressure channel 6 is located can therefore be designated as an HP bearing. Consequently, the bearing on the suction side of the cylinder bore 131 can be designated as an LP bearing.

[0094] Particular reference is made below to Figs. 4 and 5. The support of the assembly force on the opposite side of the cylinder housing 16 is to be schematically illustrated.

[0095] Figure 4 schematically illustrates the beginning of an assembly process according to the prior art. A first tool, tool 1, and a second tool, tool 2, are shown. The first tool, tool 1, engages the bearing 5 of the eccentric shaft 11, 12 or the rotor 21 attached to the eccentric shaft. The eccentric shaft 11, 12 is already equipped with the bearing 5. The second tool, tool 2, engages the cylinder housing 16. Arrows Fl indicate an assembly force. Arrows F2 indicate a holding force or counterforce. A joining direction is indicated by arrow RI. The bearing 5 sits on the bearing seat 51 provided for the bearing 5. Lines K indicate a force flow through the cylinder housing 16, in particular a force via the piston 132 or piston mechanism.

[0096] Figure 5 schematically shows the end of an assembly. It can be seen that the bearing 5 is received in the bearing seat 51, in particular pressed in.

[0097] Reference is made below to Figures 6 to 16b. Figures 6 to 16b relate to the present invention.

[0098] According to the invention, the cylinder housing 16 is equipped with at least one tool holder WA. Preferably, a first tool holder WA1 and a second tool holder WA2 are provided on the cylinder housing 16. The tool holder WA1 and WA2, respectively, in and on the cylinder housing 16, are designed to support the assembly force on the cylinder housing 16.

[0099] The tool holder WAI or WA2 can be designed as an annular groove or recess. Other geometric shapes are also conceivable, such as an edge / projection / projections or a corresponding "negative," particularly circumferential or continuous, or segmented or interrupted. Segmentation offers, among other advantages, the benefit of less material on the cylinder housing 16. A key feature of the tool holder WA1 or WA2 is its ability to absorb the assembly forces and transmit or transfer them to the tool or the tool bed. The tool holder WAI, WA2 is configured accordingly to absorb and / or transmit an assembly force and / or introduce a counterforce.

[0100] When a force is introduced or transferred via the tool holder, no forces or at least only minor forces act on the cylinder bore 131. The risk of deformation is largely eliminated.

[0101] Reference is made below to Fig. 6. An eccentric shaft 11, 12 with bearing 5 is shown. Preferably, such an eccentric shaft 11, 12 is provided for assembly in connection with a radial piston compressor according to the invention. It is preferably provided that the bearing 5 is joined to the eccentric shaft 11, 12.

[0102] Preferably, the laminated core of the rotor 22 is already joined to the eccentric shaft 11, 12. Furthermore, the bearing 4 is preferably already mounted on the eccentric shaft 11, 12.

[0103] The outer bearing ring 52 has an overlap with the opening or bearing seat 51 in the cylinder housing, which is designed in particular to form a press fit or longitudinal press fit.

[0104] Particular reference is made below to Fig. 7. This figure shows the cylinder housing 16 with the cylinder openings 131 formed therein. The high-pressure channel 6 can, for example, be formed from various components of the compressor. For instance, a section 6' of the high-pressure channel 6 is formed within the cylinder housing 16. Thus, the high-pressure side of the cylinder housing 16 is shown here. The side of the cylinder housing 16 shown facing away from the cylinder housing in Fig. 7 can therefore be considered the low-pressure side.

[0105] Reference is made below to Fig. 8. In particular, an embodiment of a cylinder housing 16 for a radial piston compressor according to the invention is shown here.

[0106] The tool holder WA1 is located in the joining direction in front of the cylinder bore 131 and can absorb axially occurring joining forces or transfer them to the associated tool WZG.

[0107] The cylinder housing 16 has, in particular, cylinder openings 131 and the bearing seat 51 for receiving the bearing 5. The bearing 5, in particular the outer ring 52 of the bearing 5, has an overlap with the bearing seat 51. A tool holder WA1 is also provided for supporting the joining forces. The tool holder WA1 is preferably provided on the low-pressure side of the cylinder housing 16.

[0108] Reference is made below to Figures 9 and 10. In particular, a further embodiment of a cylinder housing 16 for a radial piston compressor according to the invention is shown here.

[0109] A bearing 3 and a bearing 5 are to be added. As in the first embodiment, the cylinder housing 16 is equipped with a first tool holder WA1. The tool holder WA1 is preferably arranged on the low-pressure side of the cylinder housing 16. Furthermore, the cylinder housing 16 has another tool holder, in particular a second tool holder WA2, on the high-pressure side of the cylinder housing 16, especially for supporting the joining forces of the bearing 5. Finally, the cylinder housing has two tool holders WA1 and WA2, which are arranged at an axial distance from each other or on different sides of the eccentric disc 12 or the cylinder bores 131.

[0110] Reference is made below to Figures 11 and 12. In particular, each figure shows an embodiment of a cylinder housing 16 for a radial piston compressor according to the invention, wherein the piston 132, cylinder cover 15, pivot segments 133 and eccentric bearing 121 have already been mounted, and wherein, according to Figure 11, one bearing and, according to Figure 12, two bearings for supporting the eccentric shaft 11 are to be mounted in the cylinder housing 16.

[0111] Reference is made below to Figures 13 to 13b. Here is an example of the assembly of the bearing 5 and the eccentric shaft 11, 12 in the cylinder housing 16, in particular with the eccentric shaft 11, 12 with the bearing 5 mounted and the cylinder housing 16 with the cylinder covers 15, piston 132 and pivot segments 133 already mounted, as well as the eccentric bearing 121.

[0112] It is understood that only a few selected process steps are presented here, as they are helpful for understanding the process according to the invention. The process may include further steps or intermediate steps known to those skilled in the art.

[0113] The procedure includes in particular the following steps: a) Inserting a first tool WZG I into at least one

[0114] Tool holder WA1 of the cylinder housing 16; a2) Applying a bearing 5 to the eccentric shaft 11, 12 outside the

[0115] cylinder housing 16 and positioning the bearing 5 in front of the associated bearing seat 51 in the cylinder housing 16; a3) applying a joining force Fl by a second tool WZG II to the bearing 5 for insertion into the bearing seat 51; a4) applying a counterforce F2 opposing the joining force Fl via the first tool WZG I into the tool holder WA1;

[0116] Inserting the bearing 5 into the associated bearing seat 51. The first tool WZG I is preferably guided on a machine bed (not shown).

[0117] The bearing 5 and / or the assembly consisting of eccentric shaft 11, 12 and bearing 5 is preferably positioned in front of the associated bearing seat 51 using the second tool WZG II. The assembly consisting of eccentric shaft 11, 12 and bearing 5 is preferably positioned axially aligned with the bearing seat 51 in the cylinder housing 16.

[0118] The second tool WZG II presses the eccentric shaft 11, 12 or the bearing 5 on the outer bearing ring 52 into the bearing seat 51 in the cylinder housing 16.

[0119] The joining force Fl (force flow KV) is absorbed via a short path through the cylinder housing 16 by means of the tool WZG I, or transferred by means of tool WZG I into the machine or the machine bed (not shown) or the like. The tool WZG I exerts a counterforce to the joining force Fl. The force flow KV into the tool is thus improved and its effect on the cylinder head housing is reduced or minimized.

[0120] The bearing 5 is pressed into its bearing seat 51 in the cylinder housing. The tool WZG I exerts a counterforce F2. The bearing 5 is fitted.

[0121] The tools WZG II and WZG I are removed after completion of the assembly or are then no longer in use.

[0122] Figures 14 to 14d show the joining of two bearings, in this case bearing 5 and bearing 3.

[0123] The illustrations are intended to demonstrate that multiple bearings can be joined using the described interaction of tool and tool holder. Regarding Figures 14 to 14b, reference can be made to the explanations given above concerning Figures 13 to 13b.

[0124] The following steps can be used to assemble the additional bearing 3: b) Inserting a third tool WZG III into a further tool holder WA2 of the cylinder housing 16; b2) Positioning a bearing 3 in front of the associated bearing seat 31 in the cylinder housing 16; b3) Applying an insertion force F2 to the bearing 3 by a fourth tool WZG IV to insert it into the bearing seat 31; b4) Applying a counterforce Fl to the insertion force F2 via the third tool WZG III into the further tool holder WA2; b5) Inserting the bearing 3 into the associated bearing seat 31.

[0125] It is evident that the bearing 3 is pressed into the corresponding bearing seat 31 or opening in the cylinder housing 16 using tool WZG IV and a pressing force F2. Tool WZG III provides a counterforce Fl to the pressing force F2. The bearing 3 is now installed, or its final position has been reached. The assembly process can end here, and the tools can be removed.

[0126] The following assembly steps may be included as an option.

[0127] The tool WZG II or the tool WZG IV, which press in the bearings 5 ​​or 3 respectively, can be guided to a defined distance or block or stop with the cylinder housing 16, in particular until a bearing end position is reached.

[0128] The tools WZG I to IV or one can guide the assembly(s) before or after joining the bearings 3, 5, for example to support handling when inserting or removing the assembly.

[0129] Reference is made below to Figures 15 to 16b.

[0130] A fifth tool, WZG V, may be provided, which supports the radial guidance of the cylinder housing 16.

[0131] The fifth tool WZG V can be part of the first tool WZG I and can be used in conjunction with it.

[0132] A sixth tool, WZG VI, may be provided, which supports the vertical guidance of the assemblies or a tool nest. Tool WZG V and / or tool WZG VI can guide the assembly(s) before or after the insertion of bearings 3 and 5, for example, to assist with handling during insertion and removal of the assembly.

[0133] The fifth tool WZG V or the sixth tool WZG VI can be part of the first tool WZG I or the third tool WZG III or be moved with it, but during the assembly process it must not derive or absorb any assembly forces, in particular no assembly forces through the cylinder housing 16 and past or above the cylinder opening 131.

[0134] It can be seen that bearings 3 and 5 are designed as roller bearings and each comprises an outer ring 32 or 52, respectively. Preferably, bearings 3 and 5 are press-fitted into the bearing seat by means of the outer ring. Generally, it can be provided that tools WZG II and WZG IV always engage only the outer ring of bearings 3 and 5.

[0135] It may also be provided that piston 132, pivot segment 133, piston guide ring 14 and eccentric bearing 121 have been mounted or arranged in the cylinder housing 16 prior to the procedure described here (shown in figures).

[0136] In summary, this document describes a radial piston compressor in which the cylinder housing is equipped with at least one tool holder WAI or WA2 for the detachable attachment of a tool for force transmission. The tool holder provides a suitable connection point on the cylinder housing 16 to which a corresponding tool WZG I or WZG III can dock, thus enabling suitable fixation of the cylinder housing 16 for the assembly of the bearings 3 or 5.

[0137] In principle, it can be provided that the tool holder WAI, WA2 is assigned to a bearing 3 or 5 to be mounted, in particular in such a way that an advantageous position is chosen which ensures good handling or automation during the assembly process and / or good force flow.

[0138] It may preferably be provided that the tool holder WAI or WA2 is designed as an annular groove, recess, edge, projection, or as a "negative" corresponding to the tool WZG I or WZG III. The tool holder WAI or WA2 may, in particular, be designed to be circumferential, continuous, or segmented / interrupted, whereby the absorption or transfer of the assembly forces to the tool is essential or significant for the design, arrangement, and orientation of the tool holder.

[0139] It is generally possible for procedural steps to begin or be carried out simultaneously.

[0140] It can generally be provided that the pistons 132, the eccentric bearing 121, the piston guide ring 14 and / or the transmission element 133 and / or the eccentric bearing 121 are mounted before the mounting of at least one bearing 3 or 5.

[0141] Furthermore, it may be generally provided that during the assembly of the at least one bearing, at least one tool for radial and / or axial support of the cylinder housing is brought into contact with the cylinder housing.

Claims

Claims 1. Radial piston compressor, comprising - a compressor unit (1) and a drive unit (2) for driving the compressor unit, wherein - the compressor unit (1) comprises at least one, preferably a plurality of piston working chamber assemblies (13) arranged radially around an eccentric shaft (11, 12), wherein - each piston-working chamber assembly (13) comprises a working chamber (131) with a piston (132) slidably received therein, wherein the piston (132) is driven by the eccentric shaft (11, 12), wherein - the eccentric shaft (11, 12) is rotatably mounted in a cylinder housing (16) by at least one bearing (5), wherein - that at least one bearing (5) is received in an associated bearing seat (51), characterized in that the cylinder housing (16) comprises at least one tool receptacle (WA1) for the detachable attachment of a tool (WZG I) for force transmission.

2. Radial piston compressor according to at least one of the preceding claims, characterized in that the eccentric shaft (11, 12) is mounted with a further bearing (3) in an associated bearing seat (31) in the cylinder housing (16), wherein the cylinder housing (16) comprises a second tool receptacle (WAI, WA2).

3. Radial piston compressor according to at least one of the preceding claims, characterized in that the at least one bearing (3, 5) comprises an outer ring (32, 52), preferably the bearings (3, 5) each comprise an outer ring (32, 52) with which they are received in the bearing seat (31, 51) by means of a press fit.

4. Radial piston compressor according to at least one of the preceding claims, characterized in that the tool holder (WAI, WA2) is designed as an annular groove, recess, edge, projection or as a “negative” corresponding to a tool, in particular circumferential, continuous or segmented or interrupted.

5. Method for assembling at least one bearing (5) in a radial piston compressor for the manufacture of a radial piston compressor according to at least one of claims 1 to 4, characterized by the following method steps: a) Inserting a first tool (WZG I) into the at least one tool holder (WA1) of the cylinder housing (16); a2) Applying a bearing (5) to the eccentric shaft (11, 12) outside the cylinder housing (16) and positioning the bearing (5) in front of the associated bearing seat (51) in the cylinder housing (16); a3) Applying a joining force (Fl) to the bearing (5) by means of a second tool (WZG II) for insertion into the bearing seat (51); a4) Applying a counterforce (F2) acting against the joining force (Fl) via the first tool (WZG I) into the tool holder (WA1); Inserting the bearing (5) into the associated bearing seat (51).

6. Method according to claim 5, characterized in that the bearing (5), in particular the assembly of bearing (5) and eccentric shaft (11, 12), is positioned in front of the associated bearing seat (51) by the second tool (WZG II).

7. A method according to claim 5 or 6, for mounting a further bearing (3) in a radial piston compressor for manufacturing a radial piston compressor according to at least one of claims 2 to 4, characterized by the following method steps: b) Inserting a third tool (WZG III) into a further tool receptacle (WA2) of the cylinder housing (16); b2) Positioning a further bearing (3) in front of the associated further bearing seat (31) in the cylinder housing (16); b3) Applying an insertion force (F2) by a fourth tool (WZG IV) to the bearing (3) for insertion into the bearing seat (31); b4) Applying a counterforce (Fl) acting against the insertion force (F2) via the third tool (WZG III) into the further tool receptacle (WA2); b5) Inserting the bearing (3) into the associated bearing seat (31).

8. Method according to claim 6, characterized in that the bearing (5) is positioned in front of the associated bearing seat (51) by the second tool (WZG II).

9. Method according to at least one of the preceding claims, characterized in that the piston (132), eccentric bearing (121), piston guide ring (14) and / or transmission element (133) is mounted before the mounting of the at least one bearing (3, 5).

10. Method according to at least one of the preceding claims, characterized in that during the assembly of the at least one bearing (3, 5) at least one further tool, in particular fifth tool (WZG V) and / or sixth tool (WZG VI) for radial and / or axial support of the cylinder housing (16) is brought into contact with the cylinder housing (16).

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