Modular hydraulic brake actuation assembly

Abstract

The invention relates to a modular hydraulic brake actuation assembly. The hydraulic brake actuation assembly comprises a first sub-assembly and a second sub-assembly configured to be mounted to each other in a pre-assembled manner, the first sub-assembly comprising a first spool and a first actuation piston respectively movable along a first axis, at least one first spring being located along the first axis between the first spool and the first actuation piston, the first sub-assembly comprising a second spool and a second actuation piston respectively movable along a second axis, at least one second spring being located along the second axis between the second spool and the second actuation piston, the first and second axes being parallel to each other, the second sub-assembly comprising third and fourth actuation pistons, the third actuation piston being movable along the first axis and having a third contact surface capable of contacting a first contact surface of the first actuation piston, the fourth actuation piston being movable along the second axis and having a fourth contact surface capable of contacting a second contact surface of the second actuation piston.

Description

TECHNICAL FIELD

[0001] The invention relates to a hydraulic brake actuation assembly. BACKGROUND

[0002] US 10 625 726 B2 shows a hydraulic brake actuation assembly with a first and a second spool to have two independent brake circuits. The spools can be operated in parallel directly by one foot pedal in a purely mechanical way. In addition, they can be operated electrically and hydraulically.

[0003] Data sheets available on the internet on July 14, 2020 show a hydraulic brake actuation assembly with two spools operated in parallel by one foot pedal in a purely mechanical way. SUMMARY

[0004] It is the object of the invention to provide hydraulic brake actuation assemblies with different operating modes. Each individual hydraulic brake assembly should be cost-effective. In particular the following variants should be provided:

[0005] - purely mechanical operation

[0006] - purely electric and hydraulic operation with one or two control valves

[0007] - mechanical and electric and hydraulic operation with one or two control valves.

[0008] If a mechanical operation is present, it should be possible to operate with the foot or with the hand. Obviously, there are also many further variants. With a conventional design, each variant is different, wherein only few common parts are present. With the design of the invention, the first sub-assembly, which is the most complex part, is identical for all variants of the hydraulic brake assembly. It can be produced in large quantities in a cost-effective manner. The second sub-assembly has many different variants. But due to its simplicity, it is easy and cost-effective to manufacture.

[0009] According to the invention, the hydraulic brake actuation assembly comprises a first sub-assembly and a second sub-assembly, which are configured to be mounted to each other in a pre-assembled manner, wherein the first sub-assembly comprises a first spool and a first actuation piston, which are respectively movable along a first axis, wherein at least one first spring is located between the first spool and the first actuation piston along the first axis, wherein the first sub-assembly comprises a second spool and a second actuation piston, which are respectively movable along a second axis, wherein at least one second spring is located between the second spool and the second actuation piston along the second axis, wherein the first axis and the second axis are parallel to each other, wherein the second sub-assembly comprises a third actuation piston and a fourth actuation piston, wherein the third actuation piston is movable along the first axis, wherein it has a third contact surface, which is contactable with a first contact surface of the first actuation piston, wherein the fourth actuation piston is movable along the second axis, wherein it has a fourth contact surface, which is contactable with a second contact surface of the second actuation piston.

[0010] Preferably, the first sub-assembly and the second sub-assembly are fully pre-assembled before being mounted together. Preferably, there is at least one actuation means acting on the third actuation piston and / or the fourth actuation piston to operate the brake. Preferably, the first actuation piston and the second actuation piston are only operated via the third actuation piston or the fourth actuation piston, respectively. Preferably, the first contact surface to the fourth contact surface are flat and perpendicular to the first axis and the second axis, respectively. Preferably, the outer diameter of the first actuation piston at the first contact surface is larger than the outer diameter of the first spool. Preferably, the outer diameter of the second actuation piston is larger than the outer diameter of the second spool. Preferably, the first spool and / or the second spool are part of a pressure-reducing valve, respectively.

[0011] Further improvements of the invention are indicated in the preferred embodiments.

[0012] It can be provided that the second sub-assembly has a second body which accommodates a third actuation piston and a fourth actuation piston, wherein the second body is fixed to the first body of the first sub-assembly, wherein the first body accommodates the first spool and the second spool, the first actuation piston and the second actuation piston, and at least one first spring and at least one second spring, wherein the third actuation piston has a diameter at the third contact surface which is smaller than the diameter of the first actuation piston at the first contact surface, wherein the second body limits the movement of the first actuation piston along the first axis, and / or wherein the fourth actuation piston has a diameter at the fourth contact surface which is smaller than the diameter of the second actuation piston at the second contact surface, wherein the second body limits the movement of the second actuation piston along the second axis. With this embodiment, the diameters of the first actuation piston and the fourth actuation piston can be adapted in a flexible manner to the selected actuation manner. The first actuation piston and the second actuation piston are identical for all actuation manners. Furthermore, the first sub-assembly is easy to assemble, since its large recess faces the second sub-assembly. Preferably, the first actuation piston to the fourth actuation piston have a cylindrical portion at the first contact surface to the fourth contact surface, respectively, wherein the cylindrical portion is accommodated in a matching bore of the first body or the second body, respectively. Preferably, the named matching bore of the first actuation piston and / or the second actuation piston partially surrounds the cylindrical portion, for example 75%. With this embodiment, it is possible to provide a recess. Preferably, the first body and the second body adjoin each other on a flat surface, which is perpendicular to the first axis and the second axis. Preferably, the first body and the second body and the first spool and the second spool define a discharge chamber which is fluidically connected to a discharge connection of the first body. The pressure in the discharge chamber preferably acts equally on the first actuation piston and the second actuation piston from all sides, so that it does not generate a net force on the first actuation piston or the second actuation piston, respectively.

[0013] It can be provided that a recess between the first actuation piston and the second actuation piston is present in the first body, wherein the recess is covered by the second body, wherein the recess is arranged in such a way that a leakage from the third actuation piston and / or the fourth actuation piston is possible, in order to flow into the discharge chamber of the first body. In a variant of the second sub-assembly which provides an electrically driven hydraulic actuation, a leakage can occur. With the described embodiment, such a leakage can easily be directed via the discharge chamber to the reservoir. The discharge chamber preferably has a discharge connection which can be connected to the reservoir.

[0014] It can be provided that the third actuation piston together with the second body defines a first chamber, wherein the volume of the first chamber increases when the third actuation piston moves towards the first spool, and / or wherein the fourth actuation piston together with the second body defines a second chamber, wherein the volume of the second chamber increases when the fourth actuation piston moves towards the second spool, wherein the second sub-assembly comprises at least one control valve fluidically connected to the first chamber and / or the second chamber. With this embodiment, an electromechanical operation of the brake is provided. It should be noted that, as with US 10 625 726 B2, the corresponding control pressure does not act directly on the first spool or the second spool. Rather, the corresponding action is via at least one first spring or second spring. This provides a better fine control of the breakaway force and avoids oscillations of the brake force. Preferably, the at least one control valve is a pressure reduction valve, the output pressure of which is connected to the first chamber and / or the second chamber. Preferably, the set pressure of the control valve is electrically adjustable. Preferably, if there is one control valve, this is fluidically connected in parallel to the first chamber and the second chamber, so that both the first chamber and the second chamber have the same pressure. Preferably, if there are two control valves, the first chamber and the second chamber are fluidically connected to separate control valves, respectively. With this embodiment, there can be an electromechanically operated hydraulic brake actuation assembly, in which a mechanical way of directly operating the spools can or can not be present.

[0015] It can be provided that the first spool and the second spool each have a separate pressure source, wherein the at least one control valve is connected to the named at least one pressure source for pressure supply. Preferably, there is a reversing valve, wherein the pressure sources are connected to the input side of the reversing valve, wherein the output side of the reversing valve is connected to the at least one control valve. Preferably, the reversing valve is located in the second sub-assembly. Preferably, each pressure source comprises a hydraulic accumulator. If there are two control valves, each control valve can be connected to a separate pressure source, respectively.

[0016] It can be provided that the hydraulic brake actuation assembly comprises a movable actuation element configured to operate the first spool and the second spool in parallel, wherein there is a third sub-assembly configured to be mounted to the second sub-assembly in a pre-assembled manner, wherein the third sub-assembly comprises the actuation element, wherein the actuation element is configured to be in parallel contact with the third actuation piston and the fourth actuation piston. With this embodiment, a purely mechanical way of actuating the brake is provided. Preferably, the actuation element is a pedal for operation by a human foot. It is possible to use an actuation element configured to be operated by a human hand. The named contact between the actuation element and the third actuation piston and / or the fourth actuation piston can be suspended when the actuation element is not actuated.

[0017] It can be provided that the third actuation piston has a first actuation section which protrudes from the second body of the third sub-assembly in each position of the third actuation piston, wherein the actuation element can be in contact with the third actuation piston at the first actuation section, and / or wherein the fourth actuation piston has a second actuation section which protrudes from the second body in each position of the fourth actuation piston, wherein the actuation element can be in contact with the fourth actuation piston at the second actuation section. This embodiment leads to a simple configuration of the third sub-assembly, in particular when using a remote lever as described below.

[0018] It can be provided that the third sub-assembly has a third body which is fixed to the second body, wherein the actuation element is movably mounted to the third body, wherein the remote lever is pivotably mounted to the remaining actuation element relative to a third axis, wherein the remote lever has a first free end and a second free end which are located on opposite sides of the third axis, wherein the first free end can be in contact with the first actuation section, wherein the second free end can be in contact with the second actuation section. With this embodiment, the force from the actuation element can be equally distributed to the first spool and the second spool. When one of the spools is blocked due to a malfunction, the other spool is still working. Preferably, the second body and the third body are adjacent to each other on a flat surface which is perpendicular to the first axis and the second axis.

[0019] It can be provided that the actuation element is a pedal which is pivotably mounted to the third body relative to a fourth axis, wherein the fourth axis is perpendicular to the first axis and the second axis, wherein the distance from the fourth axis to the first axis and from the fourth axis to the second axis is the same. Preferably, there is a sensor which is configured to measure the pivot angle of the pedal relative to the fourth axis. Preferably, the sensor makes use of the Hall effect. Preferably, the third axis is perpendicular to the fourth axis, wherein it is located between the first axis and the second axis.

[0020] It can be provided that the first actuation section passes through the first chamber, and / or wherein the second actuation section passes through the second chamber. This leads to a simple and cost-effective third actuation piston and / or fourth actuation piston.

[0021] It is claimed a collection comprising at least two hydraulic brake actuation assemblies which are each configured according to the invention, wherein all first sub- assemblies of the collection are identical, wherein the second sub- assemblies of the collection are different from each other. There can be no and / or different or identical third sub- assemblies within the collection, for example different third sub- assemblies for foot and hand operation.

[0022] It goes without saying that the features mentioned above and those still to be explained below can be used not only in the combinations indicated, but also in other combinations or in the individual features without departing from the scope of the application. Attached Figure Description

[0023] The invention is explained in more detail below with reference to the accompanying drawings. It shows:

[0024] Figure 1 A cross-sectional view of a hydraulic brake assembly according to a first embodiment of the present invention is shown;

[0025] Figure 2 It shows a component with a first sub-component. Figure 1 The enlarged cross section;

[0026] Figure 3 It shows a second sub-component. Figure 1 The enlarged cross section;

[0027] Figure 4 It shows Figure 1 3D exploded view of the third sub-component;

[0028] Figure 5 It shows Figure 1 A 3D view of the first and second sub-components;

[0029] Figure 6 Cross-sectional views of the second and third sub-components according to the second embodiment of the present invention are shown. Detailed Implementation

[0030] Figure 1 A cross-sectional view of a hydraulic brake assembly 10 according to a first embodiment of the present invention is shown. The hydraulic brake assembly 10 includes a first sub-assembly, a second sub-assembly, and a third sub-assembly 20, 60, and 80. Each sub-assembly 20, 60, and 80 can be fully pre-assembled. The entire hydraulic brake assembly is then assembled from the three named sub-assemblies 20, 60, and 80. The named sub-assemblies 20, 60, and 80 are preferably fixed to each other by screws. In particular, the third sub-assembly 60 has various variations, wherein... Figure 1 One of the more complex variations of the second subassembly 60 is shown, which allows for both purely manual operation of the brake 100 and electro-hydraulic operation via the first control valve 70. To achieve different operational variations, the second subassembly 60 must first be modified. The first and third subassemblies 20 and 80 can remain unchanged. Therefore, a large number of the first and third subassemblies can be manufactured at low cost.

[0031] The first sub-assembly 20 has first and second brake pressure connections 24, 26, which are connected to corresponding brakes 100. The brakes 100 can be disc brakes or drum brakes. Multiple brakes can be connected in parallel to each brake pressure connection 24, 26. Two brakes 100 are operated in parallel by one actuation element 82 to have two independent brake circuits for increased safety. With all embodiments of the present application, there is a pure mechanical coupling between the actuation element 82 and the first and second spools 41, 51 if a third sub-assembly 80 is present. Thus, the brake system can be operated safely even in case of an electrically hydraulic actuation failure. The actuation element 82 is part of the third sub-assembly 80.

[0032] Furthermore, the first sub-assembly 20 has first and second supply connections 23, 25. They are typically connected to one of two independent pressure sources 101, respectively, for increased safety. The pressure sources 101 preferably comprise hydraulic accumulators, respectively. Preferably, a system for filling the accumulators is provided, which is not shown in Figure 1

[0033] The first sub-assembly 20 has a drain connection 22, which is connected to a reservoir 102. The hydraulic brake assembly 10 is preferably operated with hydraulic oil instead of DOT brake fluid as used in cars. The hydraulic brake assembly 10 is preferably used in vehicles with hydraulic work functions and / or hydraulic traction drive, wherein all hydraulic functions including brakes share a common pump for hydraulic pressure supply.

[0034] The first and second spools 41, 51 are movable along first and second axes 40, 50, respectively, wherein the first and second axes 40, 50 are central axes of the corresponding first or second spool 41, 51. The first and second axes 40, 50 are parallel. The first sub-assembly 20 has a first body 21, which is contiguous with a second body 61 of the second sub-assembly 60, which has a flat surface perpendicular to the first and second axes 40, 50. The second body 61 limits the movement of the first and second actuation pistons 42, 52 with the named flat surface, respectively. The third sub-assembly 80 has a third body 81, which is contiguous with the second body 61, which has a flat surface perpendicular to the first and second axes 40, 50.

[0035] Figure 1 The first control valve 70 is shown in a symbolic way, wherein it is actually part of the second sub-assembly 20, as can be derived from Figure 5 ​The first control valve 70 is configured as a pressure reducing valve, which is electrically operated, i.e. the output pressure of the first control valve 70 is proportional or inversely proportional to the electric current controlling the first control valve 70. The accumulators of the two independent pressure sources are preferably connected to the input side of the reversing valve 103, wherein the corresponding output side is connected to the supply connection of the first control valve 70. The drain connection of the first control valve 70 is connected to the tank 102. Figure 1 and Figure 2 All tank symbols in

[0036] With the first embodiment according to Figure 1 the first and second chambers 68, 69 of the second subassembly 60 are connected in parallel to the first control valve 70, so that both chambers 68, 69 have the same pressure. Separate control valves can be provided for the first and second chambers 68, 69, respectively.

[0037] Figure 2 An enlarged cross-section of the first subassembly 60 with the first subassembly 20 is shown in Figure 1 The first subassembly 20 has a first body 21, which surrounds the first and second spool 41, 51, the first and second actuating piston 42, 52 and the first and second spring 44, 54 in a liquid-tight manner when the first body 21 is fixed to the second body (numbered 61 in Figure 1 The first and second spool 41, 51 are part of a pressure reducing valve, respectively, wherein both pressure reducing valves are identically configured. In the following, only the pressure reducing valve with the first spool 41 is described in detail, wherein the description applies equally to the other pressure reducing valve with the second spool 51.

[0038] The first spool 41 is surrounded by an annular groove in the first body 21, which is part of the first supply connection 23 and is connected to a high pressure. Inside the first spool 41, there is a first bore 45, which is concentric to the first axis 40, wherein it only opens to the end of the first spool 41 pointing away from the first actuating piston 42. The first bore 45 holds the output pressure of the pressure reducing valve. This pressure is connected to the corresponding brake via the first brake pressure connection 24, which comprises a bore in the first body 21 perpendicular to the drawing plane of Figure 2 The named output pressure pushes the first spool 41 upwards to the first actuating piston 42. The fourth spring 28 pushes the first spool 41 in the same direction, wherein this force is mainly relevant when the system has no pressure to bring the first spool 41 into the specified position.

[0039] In the opposite direction, the first actuating piston 42 is coupled to the first spool 41 via at least one first spring 44. In accordance with Figure 2In an embodiment of the application, two concentric first springs 44 are used. The outer first spring 44 is in almost permanent contact with the first actuating piston 42 and the first spool 41. The inner second spring 44 comes into play when the outer first spring is compressed in some way. Thus, the two first springs 44 have a generally non-linear relationship between stroke and force to improve the fine control of low braking forces.

[0040] The first spool 41 has four radial second holes 46 incorporated in the first hole 45, respectively. In Figure 2 the position of the first spool 41 shown in Fig. 1, the second holes 46 are connected to the discharge chamber 29, which is connected to the reservoir via the discharge connection 22. This connection opens when the output pressure is too high, so that the output pressure is reduced.

[0041] When the output pressure is too low, the first spool 41 is moved Figure 1 down in Fig. 1 so that the second holes 46 are connected to the first supply connection 23, which carries a high pressure, wherein the output pressure is increased. Thus, the output pressure is proportional to the force of the first spring 44 acting on the first spool 41. This force depends on the position of the first actuating piston 42.

[0042] The first actuating piston 42 has a first contact surface 43, which is flat and perpendicular to the first axis 40. The first contact surface 43 is in contact most of the time with a third contact surface of a third actuating piston in the second sub-assembly (number 64 in Fig. 1). The first actuating piston 42 has a cylindrical portion 11, which defines the first contact surface 43 and which has a larger diameter than the corresponding cylindrical portion of the third actuating piston. Thus, a second body (number 61 in Fig. 1) limits the movement of the first actuating piston 42. The first actuating piston 42 is urged against the second body by a third spring 27. In the uppermost position of the first actuating piston 42, there is a small gap 47 between the spring plate 48 of the first spring 44 and the first actuating piston 42. Thus, the actuating element (number 82 in Fig. 1) has to be pressed down a little to generate a braking pressure that is different from the reservoir pressure. Figure 3 Figure 1 Figure 1

[0043] ​​​The discharge chamber 29 is defined by the first and second body 21, 61 and the first and second spool 41, 51 and is defined in a liquid tight manner. The first and second actuation spool 42, 52 are surrounded by pressure in the discharge chamber from all sides. Especially between the first and second actuation spool 42, 52 there is a recess 30 in the first body 21. Via this recess, a leak from the second sub-assembly can flow to the discharge chamber 29. The first and second actuation spool 42, 52 are guided by a cylindrical hole, respectively, which partly surrounds the respective cylindrical portion 11 to allow the recess 30.

[0044] Figure 3 An enlarged cross-section of the second sub-assembly 60 is shown. Figure 1 The second sub-assembly 60 comprises a second body 61 which houses a third and fourth actuation spool 62, 63 which are configured identical. In the following only the third actuation spool 62 is described in detail, wherein the description applies equally to the fourth actuation spool 63.

[0045] The third actuation spool 62 has a cylindrical portion 11 and a first actuation section 66, wherein the diameter of the first actuation section 66 is smaller than the diameter of the cylindrical portion 11. The second body 61 is adapted to the third actuation spool 62 in a liquid tight manner. Especially a sealing ring 71 is provided to seal the first chamber 12 defined by the first body 61 and the third actuation spool 62. When the third actuation spool 62 is moved downwards to increase the break pressure, the volume of the first chamber 68 increases. Slightly below the uppermost position of the third actuation spool 62, the third contact surface 64 is flush with an adjacent flat surface of the second body 61.

[0046] In each position of the third actuation spool 62, the first actuation section 66 protrudes from the second body 61. To increase the area of the top end of the first actuation section 66, a separate head portion 72 is fixed to the remaining part of the first actuation section 66 which is integral with the cylindrical section 11.

[0047] The first axis is the central axis of the third actuation spool 62.

[0048] Figure 4 An enlarged cross-section of the second sub-assembly 60 is shown. Figure 1An exploded perspective view of the third sub-assembly 80. The third body 81 is U-shaped, having a base plate 88 and two U-shaped legs 89. The U-shaped legs 89 are passed through by cylindrical pins 104, which define a fourth axis 84, which is the rotation axis of the actuating element 82. The actuating element 82 includes a pedal base 87 and a separate pedal plate 83. The pedal base 87 is located between the U-shaped legs 89, wherein the pins 104 pass through the pedal base 87 to form a rotary bearing. The pedal plate 83 is fixed to the pedal base 87. Different variations of the pedal plate 87 are possible, adaptable to different mounting positions of the brake actuation assembly in the corresponding vehicle. Figure 4 The pedal plate 87 is shown in an exploded view to improve the visibility of other parts that are not shown in an exploded view.

[0049] A remote lever 90 is located on the front side of the pedal base 87, which is tiltable relative to the third axis 93. The third axis 93 is perpendicular to the fourth axis 84, and it lies between the first axis and the second axis. Figure 1 Between numbers 40 and 50 in the diagram. The lever 90 has a first free end and second free ends 91 and 92, which are located on opposite sides of the third axis 93. The first and second free ends 91 and 92 are formed of balls, preferably made of steel. The named balls are capable of engaging with the head portion of the corresponding third or fourth actuating piston (…). Figure 3 Contact (number 72 in the diagram). Therefore, the actuating element 82 can act with almost equal force on the first valve core and the second valve core ( ). Figure 1 On numbers 41 and 51, even if the first or second valve core moves slightly due to brake pressure adjustment.

[0050] A sensor 86 is located between the U-shaped legs 89, which detects the rotation angle of the actuator 82. Preferably, the sensor utilizes the Hall effect. A plug 105 is electrically connected to the sensor 86.

[0051] Figure 5 It shows Figure 1 A perspective view of the first sub-assembly and the second sub-assemblies 20 and 60. The first supply connection 23 and the first braking pressure connection 24 open to the outside of the first body 21, wherein, in Figure 5 When the hydraulic brake actuation assembly is not installed in its final position on the vehicle, the corresponding plug is visible, which prevents dust from entering.

[0052] The first control valve 70 is configured as a cartridge valve, which is preferably screwed into the second body 61. (Directional control valve) Figure 1The first control valve 70 (number 103) is preferably integrated into the second body 61. The position of the first control valve 70 on the second body 61 can be selected differently using different variations of the second sub-assembly 60.

[0053] Figure 6 Cross-sectional views of the second and third sub-components 60' and 80' according to a second embodiment of the present invention are shown. Figure 1 The first sub-component can be installed to Figure 6 The components shown do not require modification of the first child component. They can be derived from... Figure 1 The third sub-component and from Figure 6 The third child component 80' is swapped, where no named child components need to be modified. This can be done from... Figure 1 The second sub-component and from Figure 6 The second child component 60' is swapped, where no named child component needs to be modified. Therefore, it is possible to provide components with... Figure 6 and Figure 3 Four variations of the hydraulic brake assembly shown.

[0054] Figure 6 A very simple variation of the second subassembly 60' is shown, wherein the third and fourth actuating pistons 62 and 63 are formed as cylindrical pins, which are provided with head portions 72, which are connected to... Figure 4 The head portion is identical. With this modification, only mechanical actuation of the brake is possible. Electro-hydraulic actuation is not possible. The same function can be achieved by modifying the first sub-assembly and completely omitting the second sub-assembly. However, using the design of this invention, according to... ​ The proposed implementation is more cost-effective because the highly complex first subcomponent can be used for a large number of different variations without requiring modification. Only the simple second subcomponent needs modification.

[0055] The second embodiment of the third sub-assembly 80' is primarily for hand operation. The corresponding actuating element 82 is linearly movable relative to the third body 81, parallel to the first and second axes 40, 50. It protrudes from the third body 81, wherein its free end may be equipped with a separate portion ergonomically designed for hand operation. The third body 81 is cup-shaped, wherein its open end is secured to the second body 61 by screws (not shown).

[0056] joystick 90 and according to ​ The first embodiment is similarly formed. It can be tilted relative to a third axis 93, which is perpendicular to the first axis and the second axis 40, 50 and located between them. It has a first free end and second free ends 91, 92, which are located on opposite sides of the third axis 93 and are spherical.

[0057] Reference signs

[0058] 10 hydraulic brake actuation assembly

[0059] 11 cylindrical portion

[0060] 12 bore

[0061] 20 first sub-assembly

[0062] 21 first body

[0063] 22 discharge connection

[0064] 23 first supply connection

[0065] 24 first brake pressure connection

[0066] 25 second supply connection

[0067] 26 second brake pressure connection

[0068] 27 third spring

[0069] 28 fourth spring

[0070] 29 discharge chamber

[0071] 30 recess

[0072] 40 first axis

[0073] 41 first spool

[0074] 42 first actuation piston

[0075] 43 first contact surface

[0076] 44 first spring

[0077] 45 first bore

[0078] 46 second bore

[0079] 47 gap

[0080] 48 spring plate

[0081] 50 second axis

[0082] 51 second spool

[0083] 52 second actuation piston

[0084] 53 second contact surface

[0085] 54 second spring

[0086] 60 second sub-assembly (first embodiment)

[0087] 60' second sub-assembly (second embodiment)

[0088] 61 second body

[0089] 62 third actuation piston

[0090] 63 fourth actuation piston

[0091] 64 third contact surface

[0092] 65 fourth contact surface

[0093] 66 first actuation section

[0094] 67 second actuation section

[0095] 68 first chamber

[0096] 69 second chamber

[0097] 70 first control valve

[0098] 71 sealing ring

[0099] 72 head portion

[0100] 80 third sub-assembly (first embodiment)

[0101] 80' third sub-assembly (second embodiment)

[0102] 81 third body

[0103] 82 actuation element

[0104] 83 foot pedal

[0105] 84 fourth axis

[0106] 85 pin

[0107] 86 sensor

[0108] 87 pedal base

[0109] 88 base plate

[0110] 89 U-shaped leg

[0111] 90 remote lever

[0112] 91 first free end

[0113] 92 second free end

[0114] 93 third axis

[0115] 100 brake

[0116] 101 pressure source

[0117] 102 reservoir

[0118] 103 diverter valve

[0119] 104 pin

[0120] 105 plug

Claims

1. A hydraulic brake actuation assembly (10) having a first valve core and a second valve core (41, 51). Its features are, The hydraulic brake actuation assembly (10) includes a first sub-assembly and a second sub-assembly (20, 60, 60'), which are configured to be pre-assembled and mounted to each other. The first sub-assembly (20) includes a first valve core (41) and a first actuating piston (42) respectively movable along a first axis (40). At least one first spring (44) is located along the first axis (40) between the first valve core (41) and the first actuating piston (42). The first sub-assembly (20) includes a second valve core (51) and a second actuating piston (52) respectively movable along a second axis (50), wherein at least one second spring (54) is located between the second valve core (51) and the second actuating piston (52) along the second axis (50). Wherein, the first axis and the second axis (40, 50) are parallel to each other. The second sub-assembly (60, 60') includes a third actuating piston and a fourth actuating piston (62, 63). The third actuating piston (62) is movable along the first axis (40) and has a third contact surface (64) that can contact the first contact surface (43) of the first actuating piston (42). The fourth actuating piston (63) is movable along the second axis (50) and has a fourth contact surface (65) that can contact the second contact surface (53) of the second actuating piston (52).

2. The hydraulic brake actuation assembly according to claim 1, in, The second subassembly (60, 60') has a second body (61) that houses the third actuating piston and the fourth actuating piston (62, 63). The second body (61) is fixed to the first body (21) of the first subassembly (20). The first body (21) houses the first valve core and the second valve core (41, 51), the first actuating piston and the second actuating piston (42, 52), and the at least one first spring (44) and the at least one second spring (54). The third actuating piston... (62) The diameter at the third contact surface (64) is smaller than the diameter of the first actuating piston (42) at the first contact surface (43), wherein the second body (61) restricts the movement of the first actuating piston (42) along the first axis (40), and / or wherein the diameter of the fourth actuating piston (63) at the fourth contact surface (65) is smaller than the diameter of the second actuating piston (52) at the second contact surface (53), wherein the second body (61) restricts the movement of the second actuating piston (52) along the second axis (50).

3. The hydraulic brake actuation assembly according to claim 2, in, The first body (21) contains a groove (30) located between the first actuating piston and the second actuating piston (42, 52), wherein the groove (30) is covered by the second body (61), wherein the arrangement of the groove (30) allows leakage from the third actuating piston and / or the fourth actuating piston (62, 63) to flow into the discharge chamber (29) of the first body (21).

4. The hydraulic brake actuation assembly according to claim 2 or 3, in, The third actuating piston (62) together with the second body (61) defines a first chamber (68), wherein the volume of the first chamber (68) increases when the third actuating piston (62) moves toward the first valve core (41), and / or wherein the fourth actuating piston (63) together with the second body (61) defines a second chamber (69), wherein the volume of the second chamber (69) increases when the fourth actuating piston (63) moves toward the second valve core (51), wherein the second subassembly ((60', 60) includes at least one control valve (70) fluidly connected to the first chamber and / or the second chamber (68, 69).

5. The hydraulic brake actuation assembly according to claim 4, in, The first valve core and the second valve core (41, 51) each have a separate pressure source (101), wherein the at least one control valve (70) is connected to at least one named pressure source (101) for pressure supply.

6. The hydraulic brake actuation assembly according to claim 4, in, The hydraulic brake actuation assembly (10) includes a movable actuation element (82) configured to operate the first valve core and the second valve core (41, 51) in parallel. A third subassembly (80, 80') is provided and configured to be pre-assembled and installed onto the second subassembly (20, 60, 60'). The third subassembly (80, 80') includes the actuation element (82) and is configured to contact the third actuation piston and the fourth actuation piston (62, 63) in parallel.

7. The hydraulic brake actuation assembly according to claim 6, in, The third actuating piston (62) has a first actuating segment (66) that protrudes from the second body (61) of the second subassembly (60, 60') at each position of the third actuating piston (62), wherein the actuating element (82) is capable of contacting the third actuating piston (62) at the first actuating segment (66), and / or wherein the fourth actuating piston (63) has a second actuating segment (67) that protrudes from the second body (21) at each position of the fourth actuating piston (63), wherein the actuating element (82) is capable of contacting the fourth actuating piston at the second actuating segment (67).

8. The hydraulic brake actuation assembly according to claim 7, in, The third sub-assembly (80, 80') has a third body (81) fixed to the second body (61), wherein the actuating element (82) is movably mounted to the third body (81), wherein the telescopic rod (90) is pivotally mounted to the remaining actuating element (82) relative to the third axis (93), wherein the telescopic rod (92) has a first free end and a second free end (91, 92) located on opposite sides of the third axis (93), wherein the first free end (91) is capable of contacting the first actuating segment (66), and wherein the second free end (92) is capable of contacting the second actuating segment (67).

9. The hydraulic brake actuation assembly according to claim 8, in, The actuating element (82) is a pedal, which is pivotally mounted to the third body (81) relative to a fourth axis (84), wherein the fourth axis (84) is perpendicular to the first axis and the second axis (40, 50), wherein the distance from the fourth axis (84) to the first axis (40) and the distance from the fourth axis (84) to the second axis (50) are the same.

10. The hydraulic brake actuation assembly according to any one of claims 7 to 9, in, The first actuating segment (66) passes through the first chamber (68) and / or the second actuating segment (67) passes through the second chamber (69).

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