Brake disc device, drive system, and double-sided grinding machine, and method for machining a brake disc

Abstract

The present invention relates to a brake disc device having a brake disc (12) having a friction ring (14) and a brake disc pot that is concentric with the central brake disc axis and has an opening whose outer peripheral side is defined by a closed boundary, a receiving device (54) having a central receiving axis, and a centering device (60) having at least one central centering surface, wherein the centering device (60) can be inserted into the opening of the brake disc pot in the inserted state of the centering device, and in the fixed state, it interacts with the boundary of the opening and / or the surface portion of the brake disc pot adjacent to the boundary in a force-fitting and / or form-fitting manner to fix the brake disc to the receiving device, and the receiving device has a pressing body (74) having a first pressing surface for pressing the annular first end surface of the brake disc pot, and relates to a brake disc device (86). The present invention further relates to a drive system, a double-sided grinding machine, and a method for machining a brake disc.

Description

Technical Field

[0001] Priority Priority is claimed based on European Patent Application No. 22174981.5 filed on May 24, 2022, and the entire disclosure of this European patent application is incorporated herein by reference.

[0002] The present invention relates to a brake disc device comprising a brake disc having a friction ring and a brake disc pot that is concentric with the central brake disc shaft and has an opening whose outer peripheral side is defined by a closed boundary.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to enable easy transfer of a brake disc in a system for machining the brake disc.

Means for Solving the Problems

[0004] This object is achieved by a brake disc device having the features described in claim 1.

[0005] The receiving device, which is the said feature, enables simple force fitting and / or form fitting with respect to the boundary of the central opening of the brake disc pot and / or the surface portion of the brake disc pot adjacent to the boundary. Thereby, the central brake disc shaft and the central receiving shaft of the receiving device can be aligned and arranged with respect to each other, and it becomes possible to fix to the brake disc in a region as far as possible from the friction surface of the friction ring of the brake disc. Further, the receiving device includes a pressing body having a first pressing surface designed to press the annular first end surface of the brake disc pot. This pressing surface enables further fixing to the brake disc, specifically in a region of the brake disc pot that is also separated from the friction surface of the friction ring.

[0006] In particular, said fixing is effective during the transfer in which the central brake disk axis is oriented horizontally. Thereby, the "upright" transfer of the brake disk becomes possible, during which the friction ring of the brake disk extends in a substantially vertical transfer plane. This is particularly advantageous in combination with the working gap of a double-sided grinding machine extending in a vertical plane, said double-sided grinding machine having two grinding wheels with mutually facing active surfaces and each designed to machine one of the two friction surfaces of the friction ring.

[0007] The centering device which is the said feature is prestressed in the direction of the fixed state, and / or preferably the fixed state is the stationary state of the receiving device. This advantage means that there is no need to supply energy from the outside to fix the brake disk to the receiving device of the brake disk device. Specifically, the receiving device cannot be connected to a tool spindle. For this reason, the brake disk device is self-sufficient and maintains the state in which the brake disk is fixed to the receiving device without any external energy supply.

[0008] What is preferable to apply the centering device and to be able to prestress it is the use of a spring, specifically a mechanical spring. Additionally or alternatively, the use of pneumatic and / or hydraulic springs is also envisaged.

[0009] Furthermore, it is preferable that the receiving device has an actuating device for shifting the centering device from the fixed state to the inserted state. Such actuation may be accompanied by an external energy supply. However, this energy supply is only required in the transition state in which the centering surface is inserted into the opening of the brake disk pot.

[0010] Furthermore, it is preferable that the receiving device has an operation unit having an operation surface for operation by an external gripping part, and the operation surface preferably extends concentrically with respect to the receiving shaft. Such an operation surface enables easy gripping of the receiving device, specifically, the receiving device to which the brake disk is fixed. The gripping part may specifically be a two-jaw gripping part that can reliably grip a preferably cylindrical operation surface and displace the operation surface for transporting the brake disk device.

[0011] It is preferable that the diameter of the operation surface is equal to or less than half of the outer diameter of the friction ring of the brake disk in the brake disk device. This enables reliable gripping of the brake disk device even in a compact installation space.

[0012] The operation unit is preferably arranged on the side of the pressing body away from the first pressing surface. In this way, even an external gripping part with a simple design can be attached without collision.

[0013] It is particularly preferable that the receiving device has a central shaft connected to the pressing body and having a free end protruding beyond the centering device. The free end can be used, for example, to insert the brake disk device having the free end of the central shaft into a guide sleeve of a drive system used to rotationally drive the brake disk.

[0014] The free end preferably has at least one connecting part for creating a form fit and / or force fit acting along the shaft axis of the central shaft together with a connecting partner provided by a spindle drive part of the drive system for rotationally driving the brake disk. The connecting partner enables the central shaft, and thus the pressing body, to be subjected to a pressing force for pressing the first pressing surface of the pressing body against the annular first end surface of the brake disk pot.

[0015] The present invention further relates to a drive system for rotationally driving a brake disk, the drive system having a spindle drive part having a second pressing surface capable of pressing against an annular second end surface of the brake disk pot that is away from the first end surface, and the drive system comprising the above-described brake disk device. Thereby, the use of the above-described receiving device for use in the drive system becomes possible, and at this time, the mutually separated end surfaces of the brake disk pot are disposed between the first pressing surface of the pressing body of the receiving device and the second pressing surface of the spindle drive part, and are fixed between these pressing surfaces.

[0016] It is particularly preferable that the drive system has a connection partner that interacts with the connection part of the central shaft of the receiving device to apply tension to the central shaft such that the first pressing surface is pressed against the first end surface of the brake disk pot and the second pressing surface is pressed against the second end surface of the brake disk pot. Overall, as a result, the brake disk is centered and arranged with respect to the central spindle axis, and a very high torque can be applied to the friction surface of the brake disk pot in the region of the end surface so as not to affect the rotational drive of the brake disk during the grinding machining of the friction surface of the friction ring of the brake disk (thus, in particular, slippage of the brake disk with respect to the spindle drive part is prevented).

[0017] In particular, a high torque can be applied when the first pressing surface and the second pressing surface overlap radially with respect to the shaft axis of the central shaft.

[0018] A particularly preferred drive system comprises an operating device having a frame arranged such that at least two holders are distributed along the circumference, each of these holders having a locking device for removably arranging a receiving device, the frame being rotatably drivable relative to the spindle drive using a rotational drive about a frame axis for displacing the holders and selectively positioning a particular holder using a particular receiving device and a brake disk fixed to the particular receiving device, the frame axis being oriented perpendicular to the spindle axis of the spindle drive. Such a drive system enables a plurality of receiving devices, each equipped with or capable of being equipped with a brake disk to be machined by grinding or a machined brake disk, to be maintained available, specifically in direct adjacency to the spindle drive. Due to the orientation of the frame axis being perpendicular to the spindle axis, the receiving devices can be maintained available even in a relatively small space.

[0019] At least two holders are provided, distributed particularly regularly along the circumference, i.e., for example, two holders arranged offset from each other by 180° along the circumference. Three holders, or four holders, or at least four holders may be provided.

[0020] The holders can be interconnected such that the distance between the holders along the circumference is unchangeable. The holders are preferably freely positionable and fixable along the circumference, for example, to change the number of holders and / or to provide a brake disk receptacle specific to the shape of a particular brake disk in the holder.

[0021] Preferably, the frame is disposed on a carriage that can be driven by a carriage drive unit with respect to a carriage support unit along a carriage axis in the direction of the spindle drive unit and in the opposite direction thereof. Thereby, it becomes possible to easily move a brake disk device having a brake disk to be machined by grinding to the spindle drive unit, and to easily move a brake disk device having a brake disk machined by grinding from the spindle drive unit. The carriage support unit can extend, for example, in a horizontal plane extending in or parallel to the upper surface of the machine bed of a double-sided grinding machine. Further, the carriage support unit can also extend in a vertical plane extending perpendicular to the upper surface of the machine bed of a double-sided grinding machine.

[0022] Receiving devices for receiving brake disks having a first brake disk shape are each arranged in at least one first holder or at least two first holders, and receiving devices for receiving brake disks having a second brake disk shape different from the first brake disk shape are each arranged in at least one second holder or at least two second holders, which is particularly preferable. Thereby, flexible machining of brake disks having various shapes (particularly with respect to various outer diameters and / or inner diameters of the friction ring) becomes possible. This means that "chaotic" machining of various brake disks is also possible, and switching operations for machining a continuous series of brake disks having various shapes are no longer required.

[0023] In a more preferable embodiment, the operating device has an operating drive unit arranged to be rotationally fixed particularly with respect to the frame axis for operating the operating device of the receiving device. Thereby, it becomes possible to shift each receiving device from a fixed state of the receiving device to an inserted state particularly for mounting a brake disk to be machined by grinding to the receiving device and for releasing a brake disk machined by grinding from the receiving device.

[0024] In a further preferred embodiment, the operating device has a release drive part arranged to be rotationally fixed, in particular, with respect to the frame shaft, for releasing the locking device. Thereby, in order to move to the spindle drive part, specifically, to prepare for connection with the spindle drive part, it becomes possible to release the receiving device equipped with the brake disk to be machined by grinding from the holder.

[0025] Furthermore, the operating device discussed above and below is also advantageous in itself and in combination with a receiving device that plays a role in releasably receiving the brake disk. Such a receiving device can have all the features of the receiving device according to claim 1. Such a receiving device may also have only some of the features of the receiving device according to claim 1, or may not have any of the features of the receiving device according to claim 1.

[0026] The present invention further relates to a double-sided grinding machine having two grinding wheels and the drive system described above. Specifically, the grinding wheel can be driven to rotate about a horizontally directed grinding wheel.

[0027] The present invention further relates to a method for machining a brake disk, having the features of the method claims.

[0028] Further features and advantages of the present invention are the subject of the following description and the schematic depiction of the preferred exemplary embodiments.

Brief Description of the Drawings

[0029]

Figure 1

Figure 2

Figure 2A

Figure 2B

Figure 3

Figure 4

Figure 5

Figure 5A

Figure 5B

Figure 6

Figure 7

Figure 8

Figure 8A

Figure 8B

Figure 8C

Figure 9

Figure 10A

Figure 10B

Figure 10C

Figure 10D

Figure 10E

Figure 10F

Figure 10G

Figure 10H

Figure 11

DETAILED DESCRIPTION OF THE INVENTION

[0030] A system for machining a brake disk by grinding is shown in perspective views in FIGS. 1, 2, 4, 5, and 7 and in various states. These states are represented by reference numeral 12 and relate to the brake disk passing through system 10.

[0031] The brake disk 12 has a friction ring 14 and a brake disk pot 16. The brake disk pot 16 has a central opening 18. The opening 18, the brake disk pot 16, and the friction ring 14 extend concentrically with respect to the central brake disk axis 20.

[0032] System 10 has a receiving area 22 for receiving the brake disk 12 and a double-sided grinding machine 24 having a drive system 26 for rotationally driving the brake disk 12. To move the brake disk 12 between the receiving area 22 and the drive system 26 of the double-sided grinding machine 24, the system 10 is provided with a transfer area 28.

[0033] The receiving area 22 is adjacent to a supply section 30 for the brake disk 12 to be machined by grinding and a discharge section 32 for the brake disk 12 machined by grinding. Between the supply section 30 and the discharge section 32, a fixed frame 34 is arranged which serves to arrange the rotating plate 36. Refer to FIGS. 1 and 5. The rotating plate 36 is rotatable relative to the frame 34 about a vertical axis 38 and can move relative to the frame 34 along a horizontal stroke axis 40.

[0034] The rotating plate 36 has two brake disk receptacles 42 and 44 which can pivot about horizontal pivot axes 46, 48 respectively assigned between a horizontal position and a vertical position. To fix the brake disk 12 to the brake disk receptacles 42, 44, each of these brake disk receptacles has a bearing surface 50 and a counter holder 52 spaced apart from the bearing surface 50. In the horizontal position of one of the brake disk receptacles 42, 44, the bearing surface 50 faces upward.

[0035] In FIG. 1, the brake disk 12 received from the supply section 30 is shown placed on the bearing surface 50 of the brake disk receptacle 42 and fixed in the region of the friction ring 14 by the counter holder 52. Starting from this state, the rotating plate 36 rotates 180° about the vertical axis 38, and the brake disk receptacle 42 pivots about the pivot axis 46 such that the brake disk 12 assumes the vertical position shown in FIG. 2. Further refer to FIGS. 2A and 2B.

[0036] System 10 further includes a receiving device 54, the structure and function of which will be described below with reference to FIGS. 2B and 3.

[0037] The opening 18 of the brake disk 12 is defined by a boundary 56 that is closed on the outer peripheral side. The receiving device 54 extends along a central receiving shaft 58 and has a centering device 60.

[0038] The centering device 60 includes a clamping cone 62 and a clamping sleeve 64 having a centering surface 66. The clamping cone 62 is connected to a piston 68 that is prestressed in a prestressing direction 70, particularly by a spring 72, via a tension rod (not shown). The spring 72 is designed as a compression spring and exerts a compressive force on both the piston 68 and a pressing body 74 of the receiving device 54.

[0039] The pressing body 74 has a first pressing surface 76 for pressing an annular first end surface 78 of the brake disk pot 16, specifically an annular first pressing surface. The brake disk pot further has a second end surface 80 that is away from the first end surface 78.

[0040] In the stationary state of the receiving device 54, the centering device 60 is prestressed by the spring 72, and the prestress is transmitted to the clamping cone 62 by the piston 68 and the tension rod, and the clamping cone is pushed into the clamping sleeve 64 so that the centering surface 66 of the clamping sleeve 64 is pressed radially outward. In this state, the diameter of the centering surface 66 is larger than the boundary 56 of the opening 18 of the brake disk 12.

[0041] To reduce the diameter of the centering surface 66, the receiving device 54 has an actuating device 82 with a pressure chamber 84 supplied by line 86 (see FIG. 2B). The pressure chamber 84 acts on the side of the piston 68 remote from the spring 72, so that when the pressure in the pressure chamber 84 rises, the pressure chamber 84 rises against the action of the spring 72. This is accompanied by the detachment of the clamping cone 62 from the clamping sleeve 64, so that the centering surface 66 is reduced and can be inserted into the opening 18 of the brake disc 12 in the inserted state.

[0042] For said insertion, the central brake disc shaft 20 and the central receiving shaft 58 are arranged in alignment with each other. Starting from the state where the brake disc 12 and the receiving device 54 are spaced apart (see FIG. 2B), the rotary plate 36 moves along the stroke shaft 40 so that the centering device 60 is inserted into the opening of the brake disc 12, see FIG. 3. By releasing the actuating device 82 (lowering the pressure in the pressure chamber 84), the spring 72 pre-tensions the clamping cone 62 again, so that the centering surface 66 of the centering device 60 is force-fitted and tensioned against the boundary 56 of the opening 18 of the brake disc 12. At the same time, the first pressing surface 76 of the pressing body 74 contacts the first end face 78 of the brake disc pot 16.

[0043] Both the brake disc 12 and the receiving device 54 form a brake disc device 86, and the brake disc device is supplied from the receiving area 22 through the transfer area 28 to the drive system 26 of the system 10.

[0044] The receiving device 54 further has a central shaft 88 that extends along the shaft axis 90 and is integrally connected in particular to the pressing body 74. The central shaft 88 passes through the centering device 60. The central shaft 88 has a connecting portion 92 at the free end, and the free end projects beyond the centering device 60, see FIG. 2B.

[0045] The receiving device 54 further has a housing 94 that is connected to the pressing body 74 and serves to accommodate the spring 72, the piston 68, and the pressure chamber 84. The housing 94 forms an operating portion 96 (refer to FIG. 3) having a cylindrical operating surface 98 that extends concentrically with respect to the receiving shaft 58 of the receiving device 54. The operating portion 96 is specifically disposed on the side of the pressing body 74 that is away from the first pressing surface 76.

[0046] The operating surface 98 is used to operate the receiving device 54, that is, specifically for using the gripping portion 100. Refer to FIG. 2.

[0047] The gripping portion 100 is part of a transfer device 102 that has a transfer shaft 104 for moving the brake disk device 86 from the receiving area 22 to the drive system 26. Refer to FIG. 4.

[0048] The transfer device 102 has a transfer arm 106 that is driven by a motor along the transfer shaft 104 and is mounted above such that the transfer rocker 108 pivots about the shaft 110.

[0049] The transfer rocker 108 is used to dispose the gripping portion 100, specifically a two-jaw gripping portion, and is preferably also used to dispose another gripping portion 112 designed to grip the operating surface 98 of the receiving device 54. Refer to FIG. 4.

[0050] Starting from the state where the brake disk 12 shown in FIG. 3 is fixed to the receiving device 54, the brake disk 12 is first disengaged from the brake disk receptacle 42. For this purpose, the transfer rocker 108 starts from the state according to FIG. 2 and pivots upward together with the brake disk device 86 according to FIG. 3. Refer to FIG. 4. Thereby, it becomes possible to pivot the brake disk receptacle 42 from the vertical position (refer to FIGS. 2 to 3) to the horizontal position (refer to FIG. 4). In this way, the transfer arm 106, integrally with the transfer rocker 108 and the gripping portion 100, can be supplied to the drive system 26 of the double-sided grinding machine 24 along the transfer shaft 104 without collision, together with the brake disk device 86. Compare FIGS. 4 and 5.

[0051] The drive system 26 is arranged on the machine bed 114 of the double-sided grinding machine 24. The machine bed 114 is used to support the two grinding wheel drive units 116 and 118, and by means of the grinding wheel drive units, each grinding wheel 120, 122 can be driven to rotate. The two grinding wheels 120 and 122 define a working gap 124 extending in a vertical plane. Refer to FIG. 7.

[0052] The drive system 26 is arranged offset laterally with respect to the working gap 124 and is movable with respect to the machine bed 114. It is provided with a carrier 126 that can be moved along the horizontal feed shaft 130 in the direction of the working gap 124 and in the opposite direction by means of a guide 128, specifically by a carrier drive unit which is known per se but not shown in the drawings.

[0053] The carrier 126 is used to arrange a spindle drive unit 132 having a spindle housing 134. The spindle housing 134 is movable with respect to the carrier 126 along the horizontal stroke shaft 136 (compare FIGS. 5B and 6), and the horizontal stroke shaft 136 extends perpendicular to the feed shaft 130.

[0054] The spindle drive unit 132 has a spindle 131 that is formed in an annular shape and has a second pressing surface 138 that can move along the stroke shaft 136 integrally with the spindle drive unit 132. The spindle drive unit 132 has a spindle shaft 140 that can drive the spindle 131 having the second pressing surface 138 to rotate.

[0055] Figures 5 to 5B depict a state in which the brake disk device 86 is stationary and held by the gripping portion 100, and the shaft axis 90 of the central shaft 88 of the receiving device 54 is aligned with the spindle shaft 140. In this case, the second pressing surface 138 of the spindle drive unit 132 is initially stationary and spaced apart from the second end surface 80 of the brake disk pot 16 of the brake disk 12.

[0056] The spindle drive unit 132 has a connection partner 142 designed to interact with the connection portion 92 of the central shaft 88. The connection partner 142 has a movable form-fitting element (not numbered), and the relative position of the form-fitting elements can be adjusted by a connection drive unit 144 so that the distance between the form-fitting elements becomes larger (refer to Figure 5B) or the distance between them becomes smaller (refer to Figure 6).

[0057] When the distance between the form-fitting elements of the connection partner 142 increases, starting from the state shown in Figure 5B, the spindle drive unit 132 can be moved in the direction of the brake disk device 86 along the stroke shaft 136. In this way, the free end of the central shaft 88 of the receiving device 54 can be inserted into the connection partner 142. Further, the second pressing surface 138 comes into contact with the second end surface 80 of the brake disk pot 16. Refer to Figure 6.

[0058] By the operation of the connecting drive part 144, a shape-fitting engagement is brought about between the connecting partner 142 and the connecting part 92 at the free end of the central shaft 88. Refer to FIG. 6. Further, the connecting drive part 144 exerts a tensile force on the connecting partner 142 and thus on the central shaft 88, and the tensile force is transmitted to the first end face 78 of the brake disk pot 16 via the pressing body 74 and its first pressing surface 76. At the same time, the second pressing surface 138 of the spindle drive part 132 presses the second end face 80 of the brake disk pot 16, and as a result, the brake disk pot 16 is securely clamped between the first pressing surface 76 of the pressing body 74 of the receiving device 54 and the second pressing surface 138 of the spindle drive part 132. This is the state depicted in FIG. 6.

[0059] In the next step, the gripping part 100 is removed from the operating surface 98 of the receiving device 54, and the spindle drive part 132 is moved along the feed shaft 130 together with the brake disk device 86 in the direction of the working gap 124 of the double-sided grinding machine 24 until the friction ring 14 of the brake disk 12 is inserted into the working gap 124. Thereafter, the friction surfaces of the friction ring 14 are machined by grinding by the two grinding wheels 120 and 122.

[0060] After the grinding machining of the brake disk 12, the brake disk can always be re-supplied to the receiving area 22 using the receiving device 54. Then the brake disk 12 can be separated from the receiving device and removed as a finished product at the discharge part 32 (refer to FIG. 1).

[0061] Figures 8 to 8C depict a further embodiment of a brake disk device 86 having a brake disk 12 and a receiving device 54. In contrast to the force-fitting centering of the centering device 60 described above, the centering device 60 of the receiving device 54 in this further embodiment acts in a form-fitting manner on the boundary 56 of the opening 18 of the brake disk pot 16. For this purpose, the centering device 60 preferably has at least one form-fitting element 146, specifically two, three, or four form-fitting elements 146, which are regularly distributed along the circumference. These form-fitting elements are loaded by springs and, in the rest state (see FIG. 8A), extend further radially outwards than in the inserted state (see FIGS. 8B and 8C).

[0062] To shift the centering device 60 from the rest state according to FIG. 8A to the inserted state depicted in FIGS. 8B and 8C, the actuating device 82 is provided in the form of an actuating pin 148.

[0063] The centering device 60 comprises a centering ring 150 which forms a centering surface 66 that is radially outwards. The centering ring 150 is an integral part of the central shaft 88 or is provided separately from the central shaft 88.

[0064] In the exemplary embodiment depicted in the figures, the centering ring 150 has a further function and forms a stopper for adjusting a spring 152 which is associated with the form-fitting element 146 and acts radially inwards on said form-fitting element. The form-fitting element 146 interacts with a blocking ball 154 at its radially inwards end.

[0065] The actuating pin 148 counteracts the pre-tension of the spring 72 and releases the form-fitting element 146 by displacement of the blocking ball 154, so that the adjusting spring 152 can displace the boundary 56 of the opening 18 of the brake disk 12 onto the centering surface 66 beyond the radially outwards end of the form-fitting element 146 by pressing the form-fitting element 146 radially inwards.

[0066] By releasing the actuating device 82, the spring 72 relaxes again. As a result, the blocking ball 154 again assumes a blocking position in which the shape - mating element 146 is radially outwardly biased against the action of the relatively weak adjusting spring 152. In this state, the radially outer end of the shape - mating element 146 rear - engages / shape - mates with the surface portion 156 of the second end face 80 of the brake - disk pot 16. The surface portion 156 is adjacent to the boundary 56.

[0067] FIG. 9 depicts a further embodiment of a brake - disk device 86 having a brake disk 12 and a receiving device 54. The centering device 60 of the receiving device 54 in this further embodiment interacts in a shape - mating manner with the boundary 56 of the opening 18 of the brake - disk pot 16. For this purpose, the centering device 60 has a spherical shape - mating element 146 attached to a pressing body 74. This shape - mating element is arranged further radially outward in the rest state (depicted in FIG. 9) than in the inserted state (not shown).

[0068] The pressing body 74 comprises an annular body 162 facing the brake - disk pot and has an annular first pressing surface 76 for pressing the annular first end face 78 of the brake - disk pot 16.

[0069] The centering device 60, as an integral component of the central shaft 88, has a radially outer centering surface 66.

[0070] To shift the centering device 60 from the rest state according to FIG. 9 to the inserted state, the actuating device 82 is provided in the form of an actuating pin 148.

[0071] In the rest state, the actuating surface 158 of the actuating pin 148 presses the shape - mating element 146 radially outward so that the shape - mating element 146 interacts in a shape - mating manner with the boundary 56 of the opening 18 of the brake - disk pot 16 to fix the brake disk 12 to the receiving device 54.

[0072] When the actuating pin 148 actuates against the pre-tension of the spring 72, the actuating surface 158 is disengaged from the shape-fitting element 146. Instead, the deflecting surface 160 engages operatively with the shape-fitting element 146. The deflecting surface 160 is shifted radially inwards relative to the actuating surface 158. As a result, the shape-fitting element 146 deflects radially inwards, releasing the shape fit with the boundary 56 of the opening 18 of the brake disk pot 16.

[0073] It will be appreciated that the receiving device 54 according to FIGS. 8 to 8C, and also the receiving device according to FIG. 9, may also be used in the system 10 according to FIGS. 1 to 7.

[0074] The double-sided grinding machine 24 depicted in FIGS. 10A to 10H has a drive system 26 having grinding drive units 116, 118 and a spindle drive unit 132. For the configuration and function of the double-sided grinding machine, reference is made to the above description of the double-sided grinding machine according to FIGS. 4 to 7.

[0075] The double-sided grinding machine 24 according to FIGS. 10A to 10H is provided with an operating device, which is generally designated by reference numeral 200.

[0076] The operating device 200 has a carriage support 202 connected to the machine bed 114 of the double-sided grinding machine 24. The carriage support 202 defines a carriage axis 204 extending parallel to the spindle axis 140.

[0077] The carriage 206 is attached to the carriage support 202 so as to be displaceable along the carriage axis 204 and can be driven by a carriage drive unit, which is known per se but not depicted in the drawings. As a result, the carriage 206 can be moved in the direction of the spindle drive unit 132 and in the opposite direction.

[0078] The frame 208 is arranged on the carriage 206 and can be rotated about a frame axis 212 by a rotational drive unit 210. The frame axis 212 extends perpendicular to the spindle axis 140.

[0079] The frame 208 has a frame structure 216 extending along the circumference 214. For example, the outer peripheral side of the runway is formed as a closed groove. The frame structure 216 is used to arrange at least two holders 218, 218', specifically to removably fix them. The holders can be connected to the frame structure 216 by sliding blocks that can be screwed or clamped into the groove, for example, at positions selected along the circumference 214.

[0080] The holders 218, 218' are used to removably hold receiving devices 54, 54', for example, the receiving devices according to FIG. 9. The holder 218 has a holding portion 220 in which one of the receiving devices 54, 54' is held.

[0081] A locking device 222 is provided for removably locking the receiving devices 54, 54' to the holding portion 220. In the locked state of the locking device 222, the receiving device 54 is locked to the holding portion 220. In the released state of the locking device 222, the receiving devices 54, 54' can be released from their respective holding portions 220. The locking device 222 can be actuated by a release drive portion 224 that shifts the locking device 222 from the locked state to the released state.

[0082] The release drive portion 224 is rotationally fixed to the frame 208 and is arranged on the carriage 206. Therefore, the release drive portion 224 cannot rotate with the frame 208 about the frame axis 212.

[0083] The operating device 200 further has an operating drive portion 226. This operating drive portion is rotationally fixed to the frame 208 and is arranged on the carriage 206. Therefore, the operating drive portion 226 cannot rotate with the frame 208 about the frame axis 212. The operating drive portion 226 is used to actuate the operating device 82 of the receiving device 54. Refer to FIG. 9.

[0084] The operation of the actuating device 82 is accompanied by the fact that the actuating drive unit 226 exerts a compressive force on the actuating pin 148 to shift the receiving device 54 from the fixed state to the inserted state. As a result, it is possible to equip the receiving device 54 with the brake disc 12 or to remove the brake disc 12 from the receiving device 54.

[0085] The holders 218, 218' are respectively provided with receiving devices 54, 54', and all the receiving devices 54, 54' are the same and can serve to receive the brake disc 12 presenting the same brake disc shape.

[0086] Alternatively, one receiving device 54 of the first holder 218, or two receiving devices 54 of the first pair of holders 218, are designed to receive the brake disc 12 presenting the first brake disc shape, and one receiving device 54' of the second holder 218', or two receiving devices 54' of the second pair of holders 218', are designed to receive the brake disc 12 presenting the second brake disc shape deviating from the first brake disc shape.

[0087] The holders 218 and the receiving devices 54 in the first pair, and / or the holders 218' and the receiving devices 54' in the second pair are preferably arranged opposite to each other with respect to the frame axis 212. There is a deviation of, for example, 30° or 45° or 60° (depicted in the drawing) or 90° between the holders 218 and the holders 218' in different pairs around the rotation axis 212.

[0088] In the initial state of the double-sided grinding machine 24, neither of the receiving devices 54, 54' is equipped with the brake disks 12 or 12', the working gap 124 is open, and the spindle drive unit 132 is oriented such that the spindle shaft 140 is aligned with the carriage shaft 204. The carriage 206 is separated from the spindle drive unit 132, and the frame 208 is positioned about the rotary shaft 212 such that the first holder 218 is disposed in the region of the actuating drive unit 226 and faces the outer region of the double-sided grinding machine 24. In this position of the first holder 218, the receiving device 54 of the first holder 218 can be actuated by the actuating drive unit 226 to shift to an inserted state in which this receiving device 54 can be equipped with the first brake disk 12. By stopping the actuating drive unit 226, the receiving device 54 reaches a fixed state in which the first brake disk is fixed to the receiving device 54 with the aid of the spring 72 (see FIG. 9). This initial state is depicted in FIG. 10A.

[0089] Starting from the state according to FIG. 10A, the frame 208 is rotated 90° (clockwise in the figure) about the rotary shaft 212 by the rotary drive unit 210, and then the carriage 206 is moved in the direction of the spindle drive unit 132 until the second end face 80 of the first brake disk 12 (see FIG. 9) contacts the second pressing surface 138 of the spindle drive unit 132 (see FIG. 10A). This state is depicted in FIG. 10B.

[0090] Starting from the state according to FIG. 10B, the locking device 222 is actuated so that the receiving device 54 can be removed from the holding part 220 of the first holder 218. Subsequently, the connecting part 92 of the receiving device 54 (see FIG. 9) is connected to the connection partner 142 of the spindle drive unit 132. This connection has already been described with reference to FIGS. 5B and 6; refer to these descriptions. In this way, the brake disk device 86 is connected to the spindle drive unit 132. Subsequently, the carriage 206 is removed from the spindle drive unit 132. This state is depicted in FIG. 10C.

[0091] Starting from the state according to FIG. 10C, the spindle drive unit 132 is moved along the feed shaft 130 together with the brake disk device 86 in the direction of the working gap 124 of the double-sided grinding machine 24 until the friction ring 14 of the first brake disk 12 is inserted into the working gap 124. Thereafter, the friction surfaces of the friction ring 14 are machined by grinding with the two grinding wheels 120 and 122.

[0092] During the grinding machining of the first brake disk 12, the movement of the second brake disk 12' (see FIG. 10E) can be prepared by the operating device 200. For this purpose, the frame 208 rotates 30° (clockwise in the figure) about the frame axis 212 starting from the state according to FIG. 10C so that the second holder 218' is arranged together with another receiving device 54' in the region of the actuating drive unit 226. This state is depicted in FIG. 10D.

[0093] As already described above, the second brake disk 12' is connected to the receiving device 54'. Subsequently, the frame 208 rotates 30° (counterclockwise in the figure) about the frame axis 212 starting from the state according to FIG. 10D, and as a result, the first holder 218 returns to the position where the receiving device 54 faces the spindle drive unit 132. This state is depicted in FIG. 10E.

[0094] After the completion of the grinding machining of the first brake disk 12, this first brake disk 12 is released by increasing the working gap 124. The spindle drive unit 132 is returned along the feed shaft 130 together with the machined brake disk 12 and the receiving device 54 by grinding until the spindle shaft 140 is aligned with the carriage shaft 204 again.

[0095] Subsequently, the carriage 206 is moved in the direction of the spindle drive unit 132, the connecting partner 142 is released, and the locking device 222 is actuated so that the receiving device 54 can be moved from the holding part 220 of the holder 218. This state is depicted in FIG. 10F.

[0096] Subsequently, the frame 208 rotates 120° (clockwise in the figure) about the rotation axis 212 so that the second holder 218’, the second receiving device 54’, and the second brake disk 12’ face the spindle drive unit 132. This state is depicted in FIG. 10G.

[0097] Subsequently, the second receiving device 54’ and the second brake disk 12’ can be connected to the spindle drive unit 132 as described above, and as a result, the grinding machining of the second brake disk 12’ can be performed later. Refer to FIG. 10H.

[0098] During the grinding machining of the second brake disk 12’, the first brake disk 12 machined by grinding can be removed from the first receiving device 54. For this purpose, the frame 208 rotates 150° (clockwise in the figure) about the rotation axis 212 so that the first receiving device 54 is disposed in the region of the operating drive unit 226. By operating the operating device 82, the brake disk 12 can be removed from the receiving device, and then a new brake disk 12 can be supplied.

[0099] FIG. 11 depicts further components of the holder 218, the locking device 222, and the release device 224.

[0100] The holding portion 220 of the holder 218 has a receiving space 228 for receiving at least a part of the pressing body 74 of the receiving device 54. The receiving space 228 is adjacent to an aperture 230 that serves for the free end of the operating device 82 of the receiving device 54 to pass through. In this way, the operating drive unit 226 can interact with the operating device 82, while the receiving device 54 is held on the holding portion 220.

[0101] The locking device 222 has a movable form-fitting element 232 which is formed, for example, in the shape of a pin and is fixed to the plate 234. The plate 234 is prestressed by a spring 236 in the direction of the locked state of the locking device 222. In this locked state, the form-fitting element 232 passes through the receiving space 228 and interacts with the corresponding form-fitting receptacle of the pressing body 74.

[0102] To move the locking device 222, the release element 238 of the release device 224 presses the plate 234 out of the receiving space 228 against the action of the spring 236, as a result of which the form-fitting with the pressing body 74 is released.

[0103] The release element 238 is formed, for example, by a piston which can be acted upon by the pressure in a cylinder 240. Additionally or alternatively, a handle 242 connected to the plate 234 is provided, by means of which it is possible to manually displace the plate 234 against the action of the spring 236.

Claims

1. A brake disc device comprising a brake disc (12) having a friction ring (14) and a brake disc pot (16) that is concentric with a central brake disc shaft (20) and has an opening (18) whose outer peripheral side is defined by a closed boundary (56), a receiving device (54) having a central receiving shaft (58), and a central alignment device (60) having at least one central alignment surface (66), wherein the central alignment device (60) can be inserted into the opening (18) of the brake disc pot (16) in the inserted state of the central alignment device (60), and in the fixed state, interacts with the boundary (56) of the opening (18) and / or the surface portion (156) of the brake disc pot (16) adjacent to the boundary (56) in a force-fitting and / or form-fitting manner to fix the brake disc (12) to the receiving device (54), and the receiving device (54) has a pressing body (74) having a first pressing surface (76) for pressing an annular first end surface (78) of the brake disc pot (16).

2. The brake disc device (86) according to claim 1, characterized in that the fixing is effective during transfer in which the central brake disc shaft (20) is oriented horizontally.

3. The brake disc device (86) according to claim 1 or claim 2, characterized in that the central alignment device (60) is prestressed in the direction of the fixed state, and / or the fixed state is the stationary state of the receiving device (54).

4. The brake disc device (86) according to claim 3, characterized in that the receiving device (54) has a spring (72) for acting on the central alignment device (60).

5. The brake disc device (86) according to any one of claims 1 to 4, characterized in that the receiving device (54) has an actuating device (82) for shifting the central alignment device (60) from the fixed state to the inserted state.

6. The receiving device (54) has an operating part (96) having an operating surface (98) for operation by an external gripping part (100), the operating surface (98) preferably extending concentrically with respect to the receiving shaft (58), specifically, the diameter of the operating surface being not more than half of the outer diameter of the friction ring (14). The brake disk device (86) according to any one of claims 1 to 5.

7. The brake disk device (86) according to claim 6, characterized in that the operating part (96) is arranged on the side of the pressing body (74) away from the first pressing surface (76).

8. The brake disk device (86) according to any one of claims 1 to 7, characterized in that the receiving device (54) has a central shaft (88) connected to the pressing body (74) and having a free end protruding beyond the centering device (60).

9. The brake disk device (86) according to claim 8, characterized in that the free end has at least one connecting part (92) for producing a form fit and / or a force fit acting along the shaft axis (90) of the central shaft (88) together with a connecting partner (142) provided by a spindle drive part (132).

10. A drive system (26) for rotationally driving a brake disk (12), the drive system having a spindle drive part (132) having a second pressing surface (138) capable of pressing against an annular second end surface (80) of the brake disk pot (16) away from the first end surface (78), the drive system further comprising the brake disk device (86) according to any one of claims 1 to 9. The drive system (26).

11. The drive system (26) according to claim 10, wherein the drive system (26) comprises the brake disc device (86) according to claim 9, and a connecting partner (142) that interacts with the connecting portion (92) of the central shaft (88) such that the first pressing surface (76) is pressed against the first end face (78) of the brake disc pot, and the second pressing surface (138) is pressed against the second end face (80) of the brake disc pot (16), thereby applying tension to the central shaft (88).

12. The drive system (26) according to claim 11, wherein the first pressing surface (76) and the second pressing surface (138) overlap radially with respect to the shaft axis (90) of the central shaft (88).

13. The drive system (26) according to any one of claims 10 to 12, further comprising an operating device (200) having a frame (208) arranged such that at least two holders (218, 218') are distributed along a circumference (214), each holder having a locking device (222) for releasably arranging a receiving device (54), and the frame (208) being rotatably drivable relative to the spindle drive unit (132) using a rotary drive unit (210) centered on a frame axis (212) for displacing the holders (218, 218') and selectively positioning a specific holder (218, 218') using a specific receiving device (54) and a brake disc (12) fixed to the specific receiving device, the frame axis (212) being oriented perpendicular to the spindle axis (140) of the spindle drive unit (132).

14. The drive system (26) according to claim 13, wherein the frame (208) is arranged on a carriage (206) that can be driven by a carriage drive unit relative to a carriage support (202) along a carriage axis (204) in the direction of the spindle drive unit (132) and in the opposite direction thereof.

15. A receiving device (54) for receiving a brake disk (12) presenting a first brake disk shape is arranged on at least one first holder (218) or at least two first holders (218), and a receiving device (54) for receiving a brake disk (12) presenting a second brake disk shape different from the first brake disk shape is arranged on at least one second holder (218') or at least two second holders (218'), the drive system (26) according to claim 13 or claim 14.

16. The operating device (200) has an operating drive part (226), and the operating drive part (226) is arranged to be rotationally fixed, in particular, with respect to the frame shaft (212) in order to operate the operating device (82) of the receiving device (54), the drive system (26) according to any one of claims 13 to 15.

17. The operating device (200) has a release drive part (224), and the release drive part (224) is arranged to be rotationally fixed, in particular, with respect to the frame shaft (212) in order to release the locking device (222), the drive system (26) according to any one of claims 13 to 16.

18. A double-sided grinding machine (24) having two grinding wheels (120, 122) and having the drive system (26) according to any one of claims 10 to 16.

19. The double-sided grinding machine (24) according to claim 18, characterized in that the grinding wheels (120, 122) can be driven to rotate about a horizontally directed grinding wheel shaft.

20. Using the brake disk device (86) according to claim 9 to transfer a brake disk (12) from a brake disk supply to the drive system (26) according to any one of claims 11 or 12, Connecting the connecting part (92) at the free end of the central shaft (88) of the receiving device (54) to the connecting partner (142) of the spindle drive part (132) of the drive system (26), Apply a tensile force to the connecting partner (142) to press the first pressing surface (76) against the first end surface (78) of the brake disk pot (16), and press the second pressing surface (138) against the second end surface (80) of the brake disk pot (16). Positioning the friction ring (14) within the working chamber (124) of the double-sided grinding machine (24) according to claim 13 or claim 14. Performing grinding machining on the friction surface of the friction ring (14) while maintaining the pressing contact of the pressing surfaces (76, 138). A method for machining a brake disk (12), comprising the above steps.

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