Electromechanical brake with a piston chamber for containing gas

Abstract

The present invention relates to an electromechanical brake having a piston chamber for containing gas. The electromechanical brake (100; 100.1; 100.2) includes an actuating piston (10) configured to translate in a direction along a piston axis (11) to actuate at least one brake shoe (110). The electromechanical brake (100; 100.1; 100.2) further includes a brake bracket (20) having a piston chamber (21) for containing gas, in which the actuating piston (10) is received, such that the actuating piston is translatably movable in a direction along the piston axis (11). Furthermore, the electromechanical brake (100; 100.1; 100.2) includes an electric motor (30) for driving the actuating piston (10). In the case of electromechanical brakes (100; 100.1; 100.2), a ventilation device (40; 40'; 40”) is provided, which is configured to ventilate the piston chamber (21) relative to the outside (300). The present invention also relates to disc brakes (200), braking systems, and motor vehicles.

Description

Technical Field

[0001] This invention relates to electromechanical brakes. It also relates to disc brakes, braking systems for motor vehicles, and motor vehicles themselves. Background Technology

[0002] Electromechanical brakes (EMBs) are ideal for vehicle braking, especially if the relevant motor vehicle is an electric vehicle. EMBs typically do not require hydraulic pressure. Specifically, braking force is generated directly on the wheels. For this purpose, an EMB includes an actuation chain, which typically has an electric motor, a transmission mechanism, and an actuating piston received in a piston chamber so that it can move translationally. In the event of braking operation, the electric motor performs a rotary drive movement via its output shaft, which is converted by the transmission mechanism into a translational drive movement, and is used to drive the actuating piston and operate, for example, the brake shoes pressing against the brake discs of the wheel brakes.

[0003] In the case of electromechanical brakes, the actuating piston is often housed in a hermetically sealed manner within the piston chamber to prevent dust or similar contaminants from penetrating into the chamber, thus eliminating potential damage to the EMB function. However, when temperature changes and / or piston movement occur, this causes variations in the gas pressure within the piston chamber. It has been shown that, in the long run, such variations in gas pressure can lead to premature wear of components in the electromechanical brake. Summary of the Invention

[0004] One object of the present invention is to provide at least one measure to eliminate premature wear in electromechanical brakes.

[0005] This objective is achieved using the electromechanical brake of the present invention. To achieve this objective, a disc brake, a braking system, and a motor vehicle according to the present invention have also been proposed.

[0006] A basic electromechanical brake suitable for, for example, wheel brakes of motor vehicles includes an actuating piston. The actuating piston is specifically configured to move translationally in the direction of its piston axis, for example, to actuate the brake shoes. The electromechanical brake also includes a brake carriage having a piston chamber for the actuating piston, which preferably contains gas. Specifically, it is specified that the actuating piston is received in the piston chamber such that it can move translationally in the direction of its piston axis. For example, the actuating piston is received in the piston chamber in such a way that the outer circumference of the actuating piston is airtight or substantially airtight relative to the corresponding circumferential wall of the piston chamber. For this purpose, sealing surfaces and / or preferably separate sealing elements can be provided. The gas contained in the piston chamber is, for example, air, particularly atmospheric air.

[0007] The electromechanical brake also includes, for example, an electric motor for driving the actuating piston. Specifically, the electromechanical brake also includes a transmission mechanism, for example, inserted between the electric motor and the actuating piston. For example, the transmission mechanism is configured to convert rotational movement output from the output shaft of the electric motor into translational drive movement for driving the actuating piston. For example, for this purpose, the transmission mechanism includes a lifting device. Specifically, the brake bracket is configured to carry the actuating piston and / or the electric motor and / or the transmission mechanism.

[0008] In this specification, the term "electromechanical brake" will be specifically understood as a brake that uses electrical and mechanical processes to perform a braking function. For example, an electric motor is used to generate a driving force or drive movement for actuating the brake, for example, by moving (preferably, translating) an actuating piston in a piston chamber. Hereinafter, electromechanical brakes will also be simply referred to as "brakes".

[0009] In this specification, the term "electric motor" will be specifically understood to mean any type of drive that is powered by electrical energy. The terms "electric drive" or "electric motor" may be understood as synonyms for the term "electric motor".

[0010] In one embodiment, the electromechanical brake includes a ventilation device for ventilating the piston chamber relative to the outside. Therefore, measures are taken to eliminate premature signs of wear on the components of the electromechanical brake. This is because the ventilation device can be used to achieve or facilitate ventilation or airflow in the electromechanical brake for the purpose of equalizing the pressure between the piston chamber and the outside. This effectively eliminates component loads caused by pressure variations in the piston chamber due to, for example, translational movement of the actuating piston and / or temperature changes or temperature switching.

[0011] In this specification, the term "external" is specifically understood to mean a space or environment containing a gas at or near atmospheric pressure. Preferably, the gas is air, particularly the atmosphere. In principle, the external gas may also have a pressure different from atmospheric pressure. In particular, it is important that the external gas has a pressure, preferably a constant or substantially constant pressure, so as to allow ventilation or air passage to the piston chamber of the electromechanical brake using a ventilation device.

[0012] In other embodiments, the ventilation device includes, for example, ventilation openings assigned to the brake bracket. Specifically, the ventilation openings are disposed on the brake bracket, for example, formed on the brake bracket. In particular, the ventilation openings are flow-connected to both external flow and piston chamber flow via flow channels such as flow passages or flow lines. This facilitates the technically simple manufacture of the ventilation device.

[0013] Filter elements can be assigned to ventilation openings, for example, to at least partially prevent dust particles and / or moisture particles from penetrating into the piston chamber. Valves, such as diaphragms or two-way valves, can also be specifically assigned to the ventilation openings to control gas exchange between the piston chamber and the outside.

[0014] According to one embodiment, the electromechanical actuator includes an actuator housing. For example, the actuator housing serves as a casing for an electric motor. Alternatively or concurrently, the actuator housing may also serve as a casing for a transmission mechanism. The actuator housing facilitates protection against external influences such as moisture and / or dust. In particular, the actuator housing is arranged on a brake bracket, thereby forming an interior. For example, the actuator housing forms a shell to protect the contents located inside, for example, against external influences such as moisture and / or dust.

[0015] In other embodiments, the ventilation opening is provided on a portion of the brake bracket located outside the actuator housing. As a result, the ventilation opening is relatively easily accessible. Alternatively, the ventilation opening may be located on a portion of the brake bracket located inside the actuator housing. As a result, the ventilation opening benefits from the protective function of the actuator housing.

[0016] If the ventilation opening is located inside the actuator housing, it is wise for the actuator housing to have at least one opening to the outside and / or to be secured to the brake bracket in a gas-permeable manner, for example, to facilitate gas exchange with the outside. This promotes pressure equalization between the inside and outside of the actuator housing. In particular, the opening of the actuator housing is in direct and / or close-to-ground operational contact with the outside.

[0017] A filter element may be assigned to the at least one opening, for example, to at least partially prevent dust particles and / or moisture particles from penetrating into the interior of the actuator housing. A valve, such as a diaphragm or a two-way valve, may also be specifically assigned to the at least one opening to control gas exchange between the piston chamber and the outside.

[0018] In other embodiments, the ventilation system includes ventilation ducts. Specifically, the ventilation ducts are intended to be installed within the vehicle interior. This allows for ventilation or airflow to the piston chambers via the vehicle interior. In this way, dust and / or moisture or other contaminants that would otherwise impair functionality can be eliminated from entering the piston chambers. The ventilation ducts can be or have flexible ductwork. The ventilation ducts can also be or have rigid ductwork. For example, the ventilation ducts may be made of or have plastic or metal components. For example, the ventilation ducts may be made of or have rubber components.

[0019] In this specification, the term "vehicle interior" will be understood to mean a space within a motor vehicle that is specifically protected from damage caused by water, moisture, and / or dust, or other external influences. The vehicle interior can be the passenger compartment of a motor vehicle. It can also be the engine compartment of a motor vehicle, specifically the protected area of ​​the engine compartment. Furthermore, the vehicle interior can be the luggage compartment of a motor vehicle. In particular, the vehicle interior forms part of the aforementioned exterior and / or the vehicle interior is a component of the aforementioned exterior.

[0020] It can be specified that the ventilation duct is preferably flow-connected at one end to the interior of the actuator housing. This facilitates a technically simple connection of the ventilation duct. For example, the ventilation opening is arranged inside to allow flow connection and thus pressure equalization between the piston chamber and the outside; for example, the free end of the ventilation duct is located in or can be laid in the outside.

[0021] Filter elements can be distributed to ventilation ducts, particularly the free ends or inlets of the ventilation ducts, for example, to at least partially prevent dust particles and / or moisture particles from penetrating into the ventilation ducts. Valves, such as diaphragms or two-way valves, can also be specifically distributed to the ventilation ducts to control gas exchange between the piston chamber and the outside.

[0022] Specifically, the actuator housing has a connection opening through which a flow connection to a ventilation duct is established or can be established. For example, at least one of the aforementioned openings in the actuator housing serves this purpose, thereby establishing a flow connection to the outside via a ventilation duct.

[0023] Specifically, the connection between the ventilation duct and the actuator housing is designed to be externally sealed, and particularly airtight. As a result, measures are taken to prevent contaminants (particularly dust and / or moisture) that could impair function from entering the ventilation path and thus into the piston chamber and / or actuator housing. For example, the connection is releasable.

[0024] In other embodiments, ventilation ducts are arranged along the power cable. As a result, the duct path provided by the power cable is used to lay the ventilation ducts. Specifically, the ventilation ducts are integrated into the power cable. For example, the ventilation duct is one of the individual ducts of the power cable, specifically surrounded by the sheath of the power cable. As a result, the power cable has a dual function. On the one hand, it is used to supply electrical energy; on the other hand, it is part of the ventilation system. Power cables are also used, for example, to supply power to another electrical consumer, such as an electric motor or electromechanical brake. In this respect, the power cable utilizes components installed or present in the electromechanical brake.

[0025] In other embodiments, the power cable is electrically connected to a socket, such as an electric motor, via a plug. For example, the plug has multiple contact elements for electrical contact with corresponding mating elements of the socket. For example, a conduit is arranged between the corresponding mating elements and the multiple contact elements, flowing in connection with a ventilation duct on one hand and with the interior of the actuator housing on the other. Therefore, in the case of a detachable connection between the power cable and the electrical consumer (particularly a plug-and-socket connection), it can be used for ventilation or air circulation in a technically simple manner. The conduit can be made of plastic material, or have a plastic material.

[0026] The free end or inlet of the ventilation duct may be equipped with a filter element, for example, to at least partially prevent dust particles and / or moisture particles from penetrating into the ventilation duct. A valve, such as a diaphragm or a two-way valve, may also be provided to control gas exchange between the piston chamber and the outside.

[0027] The electromechanical brake can be configured to perform a parking brake function. Alternatively or concurrently, the electromechanical brake can be configured to perform a service brake function. In this specification, the term "service brake function" will be specifically understood as the function by which a vehicle equipped with brakes is braked and / or can be braked to a standstill during operation (e.g., while in motion). This service brake can be initiated by the vehicle driver (e.g., by operating the brake pedal) or by automatic driving and / or braking controls (such as adaptive cruise control).

[0028] In this specification, the term "immobilization brake function" will be specifically understood to mean that, when parking brake is applied, a vehicle equipped with brakes remains stationary by means of this function. This is to prevent the vehicle from unintentionally rolling, even on an inclined road. The process of parking brake can also be called parking braking. In this specification, the term "parking brake" is used as a synonym for the term "parking brake function." The parking brake function or parking brake function can also be used for emergency braking of the vehicle. Therefore, the parking brake function or parking brake function also implies an emergency braking function.

[0029] According to one aspect, a disc brake for a motor vehicle is provided. The disc brake includes a brake disc and at least one configuration and / or at least one embodiment of the aforementioned electromechanical brake. The electromechanical brake is configured to act on the brake disc via an actuating piston and at least one brake shoe. For example, the brake bracket of the electromechanical brake forms the brake caliper of the disc brake. For example, the disc brake is a floating caliper brake. In this case, the brake bracket designed as a brake caliper is a floating caliper.

[0030] According to other aspects, a braking system for a motor vehicle is proposed. This braking system includes at least one configuration and / or at least one embodiment of the aforementioned electromechanical brake and / or at least one configuration and / or at least one embodiment of the aforementioned disc brake. In addition to the electric motor of the electromechanical brake, the braking system also includes an electronic control device for controlling the electric motor.

[0031] In one possible implementation, the control device and the electric motor are configured to set the braking force applied by at least one brake shoe according to one or more specified values ​​in order to perform braking. The braking force can be a parking braking force. In this case, the braking is a parking brake or a vehicle parking brake. Alternatively, the braking force can be a service braking force. In this case, the braking is a service brake.

[0032] For example, the specified value is included in or based on information about: a braking request requested by the driver, driver assistance system, or autonomous driving system; and / or the road inclination and / or surface inclination; and / or the current driving, deceleration, or acceleration state of the motor vehicle; and / or parameters of the motor vehicle, such as load conditions. This allows the braking force applied by at least one associated brake shoe to be set in a controlled manner, and the braking force can be quantified, for example, for comfortably braking the motor vehicle.

[0033] According to other aspects, a motor vehicle is proposed, which includes at least one configuration and / or at least one embodiment of the above-described electromechanical brake and / or the above-described disc brake and / or the above-described braking system.

[0034] For example, a motor vehicle has a vehicle interior. For example, the vehicle interior is the one already described above. In one possible implementation, the electromechanical brake is designed such that ventilation ducts for the ventilation system are laid within the vehicle interior. As a result, the inlets of the ventilation ducts are contained and protected from damage to function (particularly from water or moisture and / or dust) or other external influences, while simultaneously providing the ventilation function of the ventilation system. Attached Figure Description

[0035] Other details and features of the invention can be found in the following description of various embodiments with reference to the accompanying drawings, in which:

[0036] Figure 1 A possible embodiment of an electromechanical brake is shown in the partial cross-sectional schematic diagram. The electromechanical brake has an actuating piston, a piston chamber for receiving the actuating piston, and a ventilation device for ventilating the piston chamber.

[0037] Figure 2 The partial section diagram shows Figure 1The electromechanical brake, in another embodiment, has a ventilation device for ventilating the piston chamber.

[0038] Figure 3 The partial section diagram shows Figure 1 An electromechanical brake, further comprising other embodiments of a ventilation device for ventilating the piston chamber, and...

[0039] Figure 4 The diagram shows the ventilation ducts laid inside the vehicle. Figure 3 Electromechanical brakes.

[0040] Figure Labels

[0041] 10 Actuating Piston

[0042] 11 Piston axis

[0043] 12 Sealing elements

[0044] 20 Brake bracket

[0045] 21 Piston Chamber

[0046] 22, 22' (partial)

[0047] 22” part

[0048] 30 Electric Motors

[0049] 31” power cables

[0050] 32” plug

[0051] 33" socket

[0052] 34 Output shaft

[0053] 35 drive shafts

[0054] 40° and 40° ventilation devices

[0055] 40” ventilation device

[0056] 41, 41' Ventilation openings

[0057] 41” ventilation opening

[0058] 42' Flow Channel

[0059] 42” flow channel

[0060] 43. Ventilation ducts

[0061] 44 tubes

[0062] 50, 50' Actuator Housing

[0063] 50” Actuator Housing

[0064] 51 Internal

[0065] 52 Opening

[0066] 53 Fastening elements

[0067] 54 Sealing elements

[0068] 60 Transmission Mechanism

[0069] 60.1 Bevel gear

[0070] 60.2 Lifting device

[0071] 61 Threaded spindle

[0072] 62 Threaded Nut

[0073] 63 Anti-torsion device

[0074] 64 Output shaft

[0075] 70 pipelines

[0076] 100 Electromechanical Brake

[0077] 100.1 Electromechanical Brake

[0078] 100.2 Electromechanical brake

[0079] 110 Brake shoes

[0080] 110' Brake shoe

[0081] 200 disc brake

[0082] 210 Brake Disc

[0083] 220 Brake Caliper

[0084] 300 External

[0085] I. Vehicle interior

[0086] A. Vehicle exterior Detailed Implementation

[0087] Figure 1 Possible embodiments of the electromechanical brake 100 are shown, which is illustrated herein by way of example as a component of a disc brake 200. The disc brake 200 is, for example, a vehicle brake and can be used in motor vehicles, such as passenger cars or trucks.

[0088] The disc brake 200 includes at least two brake shoes 110, 110' arranged spaced apart from each other, with a brake disc 210 disposed between the brake shoes 110, 110'. The brake disc 210 is assigned to, for example, a vehicle wheel, and is specifically rotatably fixed to the vehicle wheel, such that the braking force or action applied to the brake disc 210 by the brake shoes 110, 110' produces a braking effect on the vehicle wheel. The disc brake 200 has a brake caliper 220, which carries the brake shoes 110, 110' and is secured to, for example, the chassis of a motor vehicle, on top of or inside it. The disc brake 200 is, for example, a floating caliper brake. In principle, the disc brake 200 can also be a fixed caliper brake.

[0089] The electromechanical brake 100 is used to actuate at least one of the brake shoes 110, 110', particularly brake shoe 110. For example, the actuating piston 10 is used for this purpose. The electromechanical brake 100 is preferably configured to actuate at least one brake shoe 110 to perform a service braking function. Alternatively or additionally, the electromechanical brake 100 may be configured to actuate at least one brake shoe 110 to perform a parking brake function or a vehicle parking brake function.

[0090] The electromechanical brake 100 is based on actuation by means of an electric actuator (specifically, an electric motor 30). Preferably, the electric actuator is the part of the actuator device used to drive the actuating piston 10. The actuator device may also include a transmission mechanism 60. The electric motor 30 includes, for example, an output shaft 34, and is preferably configured to drive the actuating piston 10 to rotate the output shaft 34 about a drive axis 35.

[0091] The transmission mechanism 60 includes, for example, a lifting device 60.2, which is configured to convert the rotary drive movement output from the output shaft 34 into a translational drive movement for driving the actuating piston 10. The actuating piston 10 itself is preferably configured to translate in the direction of the piston axis 11 in order to move in the direction of the brake disc 210 or press at least one brake shoe 110.

[0092] For example, the lifting device 60.2 is formed by a spindle lifting device and includes a threaded spindle 61 and a threaded nut 62 engaging therewith. The threaded nut 62 is preferably assigned to the actuating piston 10 and is used to perform translational drive movement, particularly pure translational drive movement, by utilizing an anti-torsion device 63. The threaded spindle 61 preferably forms the inlet of the lifting device 60.2 and absorbs the rotational drive movement originating from the electric motor 30, which is then converted into translational drive movement by the threaded engagement between the threaded spindle 61 and the threaded nut 62 under the action of the anti-torsion device 63.

[0093] In the case of the electromechanical brake 100, for example, the piston axis 11 and the drive axis 35 are positioned laterally relative to each other, and particularly orthogonally relative to each other. In the case of the electromechanical brake 100, this is achieved, for example, by a bevel gear 60.1 inserted between the electric motor 30 and the lifting device 60.2, and is, for example, a component of the transmission mechanism 60. The bevel gear 60.1 has an output shaft 64 arranged, for example, coaxially with the piston axis 11. Preferably, the output shaft 64 is rotatably fixed to the threaded main shaft 61.

[0094] The electromechanical brake 100 preferably includes a brake bracket 20, which serves, for example, as a bracket for actuating the piston 10 and / or the transmission mechanism 60 and / or the electric actuator. In a present disc brake 200 equipped with the electromechanical brake 100, the brake bracket 20 is formed, for example, by a brake caliper 220, or the brake caliper 220 further includes the brake bracket 20 as a component.

[0095] Preferably, the actuating piston 10 is received in the brake bracket 20. Preferably, the brake bracket 20 has a piston chamber 21 in which the actuating piston 10 is received, such that the actuating piston 10 can be translated in the direction of the piston axis 11. Preferably, the piston chamber 21 is not hydraulically filled, but contains a gas such as air (especially atmospheric gas). Preferably, the actuating piston 10 is sealed relative to the piston chamber 21. Preferably, a sealing element 12 is provided, which is arranged on the circumferential side between the actuating piston 10 and the wall of the piston chamber 21.

[0096] The electromechanical brake 100 preferably also includes an actuator housing 50. The actuator housing 50 serves, for example, as a cover for the electric motor 30 and / or the transmission mechanism 60. Preferably, the actuator housing 50 is arranged (in particular, fastened to) the brake bracket 20, thereby forming an interior 51. At least one fastening element 53, such as a screw element, may be used for fastening.

[0097] Preferably, the electric drive or motor 30 has an electrical connection for connecting the power cable 31 thereto. Preferably, the electrical connection has a socket 33 for receiving the plug 32 assigned to the power cable 31. The electrical connection is preferably received in an opening in the actuator housing 50, particularly tightly or substantially tightly contained, to prevent dust and / or moisture from penetrating into the actuator housing 50.

[0098] In the case of the electromechanical brake 100, a ventilation device 40 is preferably provided for ventilating the piston chamber 21 relative to the outside 300. The outside 300 is, for example, the environment outside the electromechanical brake 100. Preferably, atmospheric pressure is dominant, such that, for example, when the actuating piston 10 moves translationally in the direction of its piston axis 11 and / or when the gas in the piston chamber 21 expands due to temperature rise or temperature change, pressure equalization occurs between the piston chamber 21 and the outside 300 via the ventilation device 40. The outside 300 can be the space in the area of ​​the wheel brake and / or wheel of a motor vehicle. For example, the outside 300 is located in the area of ​​the wheel housing of a motor vehicle.

[0099] The ventilation device 40 preferably has a ventilation opening 41, which is disposed, for example, on the brake bracket 20, and is in flow connection with the outside 300 on one hand and with the piston chamber 21 on the other. For example, the ventilation opening 41 is in flow connection with the piston chamber 21 via a flow channel 42, such as one or more flow passages. Preferably, the flow channel 42 opens into the rear region of the piston chamber 21. For example, it can be seen from... Figure 1 As can be seen, the ventilation opening 41 can be arranged on a portion 22 of the brake bracket 20 outside the interior 51 of the actuator housing 50. To protect the ventilation opening 41 from the intrusion of dust and / or moisture, the ventilation opening 41 can be fitted with a filter element.

[0100] Figure 2 Other possible embodiments of the electromechanical brake 100.1 are shown in the schematic partial cross-sectional view. The electromechanical brake 100.1 is structurally or functionally similar to... Figure 1 The same parts of the electromechanical brake 100 are provided with the same reference numerals; in this respect, refer to Figure 1 The description of the electromechanical brake 100 is as follows. The electromechanical brake 100.1 may be a disc brake (e.g., according to...). Figure 1 Components of the disc brake 200.

[0101] Figure 2 The electromechanical brake 100.1 in the middle and Figure 1 The difference in the electromechanical brake 100 is that, in other embodiments, the ventilation device 40' is configured to ventilate the piston chamber 21 relative to the outside 300, and others. The ventilation device 40' has a ventilation opening 41', which is arranged on a portion 22' of the brake bracket 20 disposed within the actuator housing 50'. The ventilation opening 41' is in flow connection to the piston chamber 21, for example, via a flow channel 42' provided in the brake bracket 20. The actuator housing 50' may be, according to... Figure 1 The actuator housing 50 of the electromechanical brake 100.

[0102] The actuator housing 50' is preferably arranged on the brake bracket 20 in a gas-permeable manner to allow gas exchange between the interior 51 and the exterior 300 of the actuator housing 50'. In this way, pressure equalization is provided between the piston chamber 21 and the exterior 300 when the interior 51 is involved. The ventilation opening 41' is arranged such that it is protected by the actuator housing 50' from dust and / or moisture, and this prevents dust and / or moisture from entering the piston chamber 21.

[0103] Alternatively, the actuator housing 50' may have an opening 52, such as a slot or gap, through which gas exchange can be achieved between the interior 51 and the exterior 300 of the actuator housing 50'.

[0104] Figure 3 Other possible embodiments of the electromechanical brake 100.2 are shown in the schematic partial cross-sectional view. The electromechanical brake 100.2 is structurally or functionally similar to... Figure 1 The same parts of the electromechanical brake 100 are provided with the same reference numerals; in this respect, refer to Figure 1 The description of the electromechanical brake 100 is as follows. The electromechanical brake 100.2 may be a disc brake (e.g., according to...). Figure 1 Components of the disc brake 200.

[0105] Figure 3 The electromechanical brake 100.2 in the middle and Figure 2 The difference in the electromechanical brake 100.1 is that, in other embodiments, the ventilation device 40” is provided for ventilating the piston chamber 21, and others. The ventilation device 40” has a ventilation opening 41” arranged on a portion 22” of the brake bracket 20 arranged within the actuator housing 50”. The ventilation opening 41” is in flow connection to the piston chamber 21, for example, via a flow channel 42” provided in the brake bracket 20.

[0106] Actuator housing 50” can be according to Figure 1 The actuator housing 50 of the electromechanical brake 100. Ventilation opening 41” can correspond to Figure 2 The ventilation opening 41' of the ventilation device 40' is located within the ventilation device. Furthermore, the flow channel 42" can correspond to... Figure 2 The ventilation device 40' has a flow channel 42'.

[0107] A ventilation duct 43 is provided in the ventilation device 40”. The ventilation duct 43 is preferably intended to be laid in a spatial region away from the electromechanical brake 100.2, for example, so as to enable gas exchange with the piston chamber 21 of the electromechanical brake 100.2 from there, and thus allow pressure equalization between the piston chamber 21 and the region.

[0108] Ventilation duct 43 is preferably assigned to power cable 31. Figure 1 The power cable 31 is used, for example, to supply electrical power to the motor 30. For example, the ventilation duct 43 is arranged along the power cable 31.

[0109] As from Figure 3 As can be seen, instead of the power cable 31, a power cable 31" with an integrated ventilation duct 43 can be installed therein. The ventilation duct 43 is preferably one of the independent ducts of the power cable 31" and is, for example, surrounded by the sheath of the power cable 31". The power cable 31" is preferably electrically connected to the motor 30 via a plug-receptacle connection. Preferably, the receptacle 33" is assigned to the motor 30 and the plug 32" is assigned to the power cable 31".

[0110] Preferably, the plug 32” has a plurality of contact elements for electrical contact with a corresponding mating element of the socket 33”. Preferably, a tube is arranged between the plurality of contact elements and the corresponding mating elements, the tube being in flow connection, on one hand, to a ventilation line 43, and on the other hand, to the interior 51 of the actuator housing 50”. Figure 3 The conduit is shown only schematically and is provided by reference numeral 44. Additional conduits may also be assigned to socket 33”.

[0111] The actuator housing 50” is preferably arranged on the brake bracket 20 in a sealed manner, particularly in an airtight manner. For this purpose, a preferably separate sealing element 54 may be provided. The actuator housing 50” is preferably designed without, for example, a... Figure 2 Such an opening is the opening 52 of the actuator housing 50. Therefore, pressure equalization occurs only via the ventilation duct 43, which can be laid with its free end in the spatial interval area of ​​the motor vehicle.

[0112] Figure 4 The electromechanical brake 100.2, which is part of the disc brake 200, is illustrated schematically by way of example. Here, the ventilation duct 43, which is laid out on the motor vehicle, is illustrated schematically by way of example. The dividing area between the vehicle interior I and the vehicle exterior A is indicated, for example, by the dashed line 70 provided here.

[0113] The vehicle interior I can be the passenger compartment of a motor vehicle. The vehicle exterior A is, for example, the area of ​​the motor vehicle's wheel brakes and / or associated wheel arches. For example, the vehicle exterior A is located in areas where moisture and / or dust are present during vehicle operation. Preferably, the vehicle interior I is considered a space that is substantially free of moisture and / or dust.

[0114] exist Figure 4In this configuration, the ventilation duct 43 is laid as an integral part of the power cable 31” for supplying electrical power to the motor 30 in the vehicle interior I. As a result, the inlet or free end of the ventilation duct 43 is arranged in a dustproof and / or waterproof space forming the exterior 300, with ventilation or pressure equalization occurring relative to the exterior 300 and with respect to the piston chamber 21.

[0115] In this specification, references to specific aspects, embodiments, or designs mean that a particular feature or property described in connection with that aspect, embodiment, or design is at least included therein, but not necessarily in all aspects, embodiments, or designs of the invention. It must be explicitly stated that any combination of different features and / or structures and / or properties described with respect to the invention is included in the invention unless expressly or obviously contrary to the context.

[0116] Unless otherwise stated, the use of some or all examples or exemplary expressions in the text is intended to illustrate the invention only and does not constitute a limitation on the scope of the invention. Furthermore, the expressions or wording in the specification should not be construed as referring to elements not claimed but essential to the practice of the invention.

Claims

1. An electromechanical brake (100; 100.1; 100.2) for a motor vehicle, the electromechanical brake comprising: An actuating piston (10) is configured to translate in the direction of the piston axis (11) in order to actuate at least one brake shoe (110). A brake bracket (20) has a piston chamber (21) for containing gas, in which the actuating piston (10) is received, such that the actuating piston (10) can be translated in the direction of the piston axis (11); An electric motor (30) is used to drive the actuating piston (10); and Ventilation device (40; 40'; 40''), which is used to ventilate the piston chamber (21) relative to the outside (300), The ventilation device (40; 40'; 40'') includes ventilation openings (41; 41'; 41''), which are disposed on the brake bracket (20) and are in flow connection with the external environment (300) on one hand and with the piston chamber (21) on the other. The electromechanical brake also includes an actuator housing (50; 50'; 50''), which serves as an outer cover for the electric motor (30) and is arranged on the brake bracket (20), thereby forming the interior (51). The ventilation opening (41') is arranged on a portion (22'; 22'') of the brake bracket (20) located within the interior (51). The actuator housing (50'') is arranged in an airtight manner on the brake bracket (20), and the ventilation device (40'') includes a ventilation duct (43) which is fluidly connected to the interior (51) of the actuator housing (50'') and is intended for installation inside a vehicle (I). Wherein, the vehicle interior (I) forms the exterior (300) and / or the vehicle interior (I) is a part of the exterior (300).

2. The electromechanical brake according to claim 1, wherein, The ventilation duct (43) is arranged along the power cable (31'') used to supply electrical power to the motor (30).

3. The electromechanical brake according to claim 2, wherein, The ventilation duct (43) is integrated into the power cable (31'').

4. The electromechanical brake according to claim 2, wherein, The power cable (31'') is electrically connected to the socket (33'') of the motor (30) via a plug (32''), wherein the plug (32'') has a plurality of contact elements for making electrical contact with a corresponding mating element of the socket (33'') and a tube (44) is arranged between the plurality of contact elements and the corresponding mating element, the tube (44) being in flow connection with the ventilation duct (43) on one hand and in flow connection with the interior (51) of the actuator housing (50'') on the other hand.

5. A disc brake (200) for a motor vehicle, said disc brake (200) comprising a brake disc (210) and an electromechanical brake (100; 100.1; 100.2) according to any one of claims 1 to 4, wherein, The electromechanical brake (100; 100.1; 100.2) is configured to act on the brake disc (210) via the actuating piston (10) and at least one brake shoe (110).

6. A braking system for a motor vehicle, the braking system comprising an electromechanical brake (100; 100.1; 100.2) according to any one of claims 1 to 4 for actuating at least one brake shoe (110) and comprising an electrical control device for controlling the electric motor (30) of said electromechanical brake (100; 100.1; 100.2), wherein, The electrical control device and the electric motor (30) are configured to set the braking force applied by the at least one brake shoe (110) according to one or more specified values.

7. A motor vehicle comprising an electromechanical brake (100; 100.1; 100.2) according to any one of claims 1 to 4.

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