Electromechanical actuator cartridge

Abstract

The utility model relates to an electromechanical actuator box. The actuator cartridge includes an actuation assembly rotationally coupled to an actuation motor and a sleeve. The sleeve includes a shifting device groove extending circumferentially around the sleeve, the shifting device groove configured to axially catch the shifting device, and a gap extending from an axial side of the sleeve to the shifting device groove.

Description

TECHNICAL FIELD

[0001] The present description relates generally to an electromechanical actuator cartridge for a shift device. More specifically, the present disclosure relates to an electromechanical actuator cartridge with shift device clearances that intersect with shift device slots for effective assembly with a shift device. BACKGROUND

[0002] Transmissions of certain vehicles can provide speed-torque conversion functionality to a powertrain. Multi-speed transmissions have a primary gear ratio adjustment functionality. To change gear ratios, certain transmissions also include shift forks that allow gear clutches to engage and disengage.

[0003] JP 2013 / 234703 A to Uemoto discloses an electric actuator for a transmission clutch. The electric actuator of Uemoto includes an electric motor that can cause axial translation of a shift lever shaft, thereby moving a shift fork that engages with a clutch sleeve.

[0004] The inventors have recognized several drawbacks that can exist with the transmission of Uemoto and previous others. For example, the system of Uemoto can require complex installation steps. For example, assembly steps of the system can directly involve a main housing in a transmission system to install the actuator. The inventors have recognized that it is necessary to assemble the transmission actuator separately from the main transmission system and then install the actuator assembly into the main transmission system using an embedded installation procedure. SUMMARY

[0005] The electromechanical actuator cartridge can address the above issues. The electromechanical actuator cartridge includes an actuation assembly with a sleeve. The sleeve includes a shift device slot extending circumferentially around the sleeve, the slot configured to axially capture a shift device, and a plurality of clearances extending from axial sides of the sleeve to the shift device slot. The actuator cartridge further includes an actuation motor rotationally coupled to the actuation assembly. Such an electromechanical actuator cartridge can be assembled prior to installation into a transmission case and verified for functionality as needed (e.g., using end-of-line testing), thereby enabling the actuator cartridge to be effectively installed at a later time and simplifying the manufacturing process of the transmission case.

[0006] In one example, the electromechanical actuator cartridge can further include an installation brake configured to prevent rotation of the screw shaft and removably coupled to the actuator cartridge housing. The installation brake allows the sleeve to be held in a desired axial position during installation of the actuator cartridge housing and then removed from the actuator cartridge housing as needed. In this way, manufacturing efficiency of the transmission can be further improved.

[0007] In addition, in one example, the sleeve can be connected with or integrated with a nut, the nut being threadably connected with a screw shaft, and the screw shaft being rotationally connected with a drive motor. In this way, the motor can effectively translate the sleeve axially.

[0008] It is to be understood that the above overview is intended to provide a simplified summary of concepts further described in the detailed description. It is not intended to determine key or essential features of the claimed subject matter, the scope of which is defined solely by the claims that follow the detailed description. Furthermore, the claimed subject matter is not limited to implementations that solve any or all of the problems noted in the above overview or any part of this disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 An example of a vehicle system with a transmission is shown, the transmission including an actuator and a shift fork.

[0010] Figure 2 And Figure 3 An example of an electromechanical actuator cartridge for a transmission is shown.

[0011] Figure 4 An example of a cross-section of Figure 2 An actuator cartridge.

[0012] Figure 5 An example of a screw shaft in Figure 2 An actuator cartridge.

[0013] Figure 6 An example of a drive motor shaft connected with the screw shaft of Figure 5

[0014] An example of a cross-section of Figure 7 An actuator cartridge. Figure 2

[0015] An example of a mounting brake connected with the screw shaft of Figure 8 An actuator cartridge. Figure 7

[0016] An example of an actuator cartridge of Figure 9 before being mounted to a transmission housing. Figure 2

[0017] An example of a transmission housing and shift fork position to mate with the sleeve of Figure 10 a transmission barrel. Figure 2

[0018] An example of Figure 11 An actuator cartridge after being mounted to a transmission housing. Figure 2

[0019] Figure 12 ​is a method flowchart of installing an actuator cartridge into a transmission housing

[0020] Figure 13A and 13B A shift fork and fork pad are shown. DETAILED DESCRIPTION

[0021] The following description relates to Figure 1 a vehicle system. As shown, a vehicle includes a system with an electromechanical actuator cartridge. The electromechanical actuator cartridge can include an actuation motor that can drive rotation of a screw shaft of an actuation assembly. As shown, the actuation motor can interface with the screw shaft through a slot and shaft extension. Further, as shown, a drain conduit can be positioned proximate an interface between the actuation motor and the actuation assembly to reduce the chance of the actuation motor being flooded with lubrication oil from the actuation assembly. Without an installation brake, rotation of the screw shaft can cause a nut and sleeve of the actuation assembly to translate axially along the screw shaft. As shown, an installation brake can be incorporated within the electromechanical actuator cartridge during installation of the electromechanical actuator cartridge into a transmission case, as shown. As shown, installation of the electromechanical actuator cartridge into the transmission housing includes aligning a gap of the actuation assembly sleeve with a shift fork pad of a shift fork. As shown, the installation brake can be removed from the electromechanical actuator cartridge, and after installation into the transmission housing, a connection device can be added to the electromechanical actuator cartridge. A method of installing an electromechanical actuator cartridge into a transmission housing is shown. Figures 2-4 Figure 5 and Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12

[0022] Figures 1-11 and 13A-13B include a coordinate system for determining a view direction. In one example, the Y-axis can be a vertical axis (e.g., parallel to a gravity axis), the X-axis can be a longitudinal axis (e.g., a horizontal axis), and / or the Z-axis can be a transverse axis. However, in other examples, these axes can have other directions.

[0023] Figure 1 ​​​​​​​​A schematic view of a vehicle 100 with a powertrain 102 is shown, which can include a prime mover 104 and a system 106. In the illustrated example, the system is a transmission. However, in other examples, the system can be a multi-speed axle or a propeller shaft. In some examples, the prime mover 104 can be an electric machine (e.g., traction electric machine). In such examples, the electric machine can be electrically coupled to an energy storage device 108 (e.g., one or more traction batteries, capacitors, fuel cells, combinations thereof, etc.). Further, in electric machine examples, the electric machine can be configured to operate as a generator under selected conditions to provide electrical energy, such as to charge the energy storage device 108. In other examples, the prime mover 104 can be an internal combustion engine. Thus, the vehicle 100 can be a hybrid electric vehicle, a fully electric vehicle, or an internal combustion engine vehicle.

[0024] In examples, the system 106 delivers mechanical power to a differential 110 of an axle assembly 112. However, the system 106 can also deliver mechanical power to other axle assemblies 114 in the vehicle 100. Further, in other examples, the transmission can be combined with one of the axles to form an electric axle assembly. In electric axle examples, in some cases, an internal combustion engine can provide mechanical power to another axle. However, in different embodiments, a variety of powertrain configurations can be employed.

[0025] The system 106 (e.g., transmission) can be configured to receive torque from the prime mover 104 through a shaft (e.g., propeller shaft) and / or other suitable mechanical components. The system 106 includes an electro-mechanical cassette actuator 116. The electro-mechanical cassette actuator 116 is a cassette actuator that adjusts a shift device 118 of the transmission. In some examples, the shift device 118 can be a shift fork. The shift device 118 engages and disengages a clutch 120, which engages and disengages a gear 122. In this way, the operating gear ratio of the transmission can be adjusted. Figure 1 The electro-mechanical cassette actuator 116, shift device 118, clutch 120, and gear 122 are schematically depicted in Figures 2-11 and Figures 13A-13B are described in more detail.

[0026] Although Figure 1 schematically depicts one clutch and associated actuation components, it is understood that the system 106 and other transmissions described herein can include multiple clutches and associated actuation components that can have similar or different structures than the clutch and actuation components, the structures of which are described in more detail in Figures 2-11 and Figures 13A-13B . Thus, the system 106 can be a multi-speed transmission having multiple selectable discrete gear ratios.

[0027] The system 106 can output torque to the differential 110. The output torque can be adjusted in accordance with selective adjustment of the gear engagement by the system 106 to accommodate desired vehicle operation. Torque from the system 106 can drive rotation of the differential 110, which in turn drives rotation of the axle 124 that is rotationally coupled to the wheels 126. In the illustrated example, the system 106 is spaced apart from the differential 110 and axle assembly 112. It will be appreciated, however, that in other examples the transmission can be incorporated into the axle assembly 112. In particular, in such examples the axle assembly 112 can form an electric axle that incorporates a transmission (e.g., a gearbox) and traction motor. The electric axle can be effectively integrated into a variety of vehicle platforms.

[0028] The controller 152 can form part of the control system 150. The controller 152 can include a microcomputer having components including a processor 154 (e.g., a microprocessor unit), input / output ports, electronic storage media 156 (e.g., read-only memory chips, random access memory, keep-alive memory, data buses, etc.) for executable programs and calibration values. The storage media can be programmed with computer-readable data representing instructions executable by the processor for performing the methods and control techniques described herein and other intended but not specifically listed variations. Thus, the control techniques, methods, etc. set forth herein can be stored as instructions in a non-transitory memory.

[0029] As shown, the control system 150 receives information from sensors 158 and sends control signals to actuators 160. For example, the sensors 158 can include battery state of charge sensors, clutch position sensors, etc.

[0030] The controller 152 can receive input data from the sensors, process the input data by the processor, and trigger one or more actuators in response to the processed input data in accordance with instructions or code programmed therein that correspond to one or more routines. In certain examples, the controller 152 can include instructions to send instruction signals to the actuators 116 of the shift device 118 to engage or disengage the clutches 120 to change the operating gear ratio of the transmission.

[0031] Figure 2 And Figure 3 An electromechanical actuator cartridge 200 is shown. The electromechanical actuator cartridge 200 can be incorporated in a transmission, such as the system 106 described in Figure 1 Thus, the electromechanical actuator cartridge 200, when installed, can drive a shift device 201 (e.g., a shift fork) that in turn drives a clutch 203 (e.g., a dog clutch or synchronizer). Schematic views of these devices are shown in Figures 2-3In practice, however, these devices are more complex in structure. Moreover, the mechanical interaction between the shift device and the actuator cartridge 200 will be described in detail below. Figure 9

[0032] The electromechanical actuator cartridge 200 includes an actuation motor 202 and an actuation assembly 204. The actuation motor 202 is rotationally coupled to the actuation assembly 204. Moreover, the actuation assembly 204 converts rotational input to axial translation of the shift device 201.

[0033] In certain examples, the actuation motor 202 can be a brushless direct current (DC) motor. However, the actuation motor 202 can take a variety of forms. For example, in other examples, the actuation motor 202 can be an alternating current (AC) motor. In the illustrated example, the actuation motor 202 includes an electrical interface 205. The electrical interface 205 allows the motor to receive control instructions and electrical power for operation. It will also be appreciated that the actuation motor 202 includes an electromagnetically interacting rotor and stator.

[0034] The actuation assembly 204 includes a sleeve 206. The sleeve 206 includes a pair of shift device grooves 208 that extend at least partially circumferentially around the sleeve 206. The pair of shift device grooves 208 are positioned along an outer surface 210 of the sleeve 206. In detail, in the illustrated example, the shift device grooves 208 each extend partially around the outside of the sleeve 206. However, in other embodiments, one shift device groove can extend circumferentially around the entire sleeve 206 or a substantial portion of the sleeve (e.g., 0°-270° in one use case).

[0035] The pair of shift device grooves 208 are contoured to axially capture a shift device extension, such as a shift fork pad, of the shift device 201. The axial demarcation of the shift device extension allows the sleeve to move the shift device in opposite axial directions to engage and disengage the clutch 203.

[0036] The sleeve 206 also includes a gap 212 (e.g., a pair of gaps) that each extend from an axial side 213 of the sleeve to one of the shift device grooves 208. The gap 212 can extend in a direction parallel to the x-axis. Thus, the gap 212 can provide a path for the shift device extension to be inserted into the shift device groove during installation of the actuator cartridge. In this way, the actuator cartridge can be effectively coupled with the shift device. For example, the shift fork pad can be positioned in the gap 212 and then axially translated into the groove 208. Subsequently, the actuator cartridge 200 or the shift device 201 can be rotated (about the x-axis) to align the shift device extension with the groove 208. In this way, the shift fork pad can be positioned in one of the shift device grooves 208 so that the sleeve can axially move the shift device in opposite axial directions. ​

[0037] In some cases, the recess 208 can be defined by opposing walls 270 and 272 and an end wall 274. In addition, the gap 212 can be defined by opposing walls 276 and 278. Moreover, the wall 278 can extend into the recess and form a portion of the boundary thereof. In this manner, the sleeve can be profiled to effectively cooperate with a shift fork pad or other suitable shift device component. In other examples, however, other recess and / or gap profiles can be used.

[0038] The sleeve 206 can be connected with or formed with the nut 214. When the sleeve and nut are distinct components, the sleeve 206 can be positioned circumferentially about the body 400 of the nut 214, as shown in Figure 4 In such examples, the sleeve can be interference fit with the nut, engaged with the nut, connected to the nut by a connecting device (e.g., bolt, pin, etc.), and / or welded to the nut. Accordingly, the inner circumferential surface of the sleeve 206 can be in contact or otherwise in contact with the body face of the nut 214.

[0039] The nut 214 can include a head 216. The head 216 can include one or more openings 218 that can be configured to receive one or more connecting devices 220. The connecting devices 220 can extend through the head 216 of the nut 214 into the sleeve 206. In this manner, the connecting devices 220 can connect the sleeve 206 with the nut 214. As previously mentioned, however, other suitable connection techniques can be employed.

[0040] In the embodiment shown in Figures 2-3 , the nut 214 is threadably engaged with a screw shaft 222. Accordingly, the nut 214 includes an internal thread 401 and the screw shaft 222 includes an external thread 403, as shown in Figure 4 The thread 401 on the screw shaft 222 can be located on a portion of the shaft between a bearing 402 and a bearing 406, as will be discussed in detail below. In some cases, the portion of the screw shaft 222 outside of the thread can have a smooth surface.

[0041] Continuing with Figures 2-3 , in the illustrated example, the actuation assembly 204 also includes a sleeve guide 224. Other actuation assembly configurations, however, can be employed. In addition, in the illustrated example, the sleeve guide 224 is connected with the sleeve 206 and inhibits rotation of the sleeve and the nut 214 during rotation of the screw shaft 222 by the actuation motor 202. For example, as shown in Figure 4 , a projection 405 (e.g., a rail) and / or a flat of the sleeve 206 can interface with the sleeve guide 224, thereby causing the sleeve guide to inhibit rotational movement of the sleeve 206. Accordingly, the nut 214 and the sleeve 206 translate axially along the screw shaft 222 during rotation of the screw shaft 222 by the actuation motor 202. AsFigures 2-3 As shown, the sleeve guide 224 can be connected to a bridge 226 of the actuator cartridge housing 234 of the actuation assembly 204. In the illustrated example, the bridge 226 extends between a bearing interface portion 228 and a main body 230 of the cartridge housing 234.

[0042] The bridge 226 can more conveniently access the gap 212 in the sleeve 206. In particular, the bridge 226 can span an arc (with reference to the rotational axis 251 of the screw shaft 222). In different use cases, the arc can range from 0°-30°, 0°-20°, or 0°-15°. Thus, the bridge allows for an open space around the cartridge housing 234 that enables the actuator cartridge 200 to be quickly and easily connected to a shift device 201 (e.g., a shift fork), thereby simplifying assembly and disassembly of the transmission. The open space is between the bearing interface portion 228 and the cartridge housing body 230.

[0043] The actuator cartridge 200 can also include a screw shaft mount 232 that can have a radially outwardly extending flange 236. The screw shaft mount 232 will be discussed in more detail below. Figure 4 The screw shaft mount 232 will be discussed in more detail below.

[0044] In examples, the cartridge housing 234 includes a connection interface 248 that extends radially from the cartridge housing (e.g., away from the x-axis). However, other cartridge housing configurations can be employed.

[0045] Each connection interface 248 includes one of a plurality of connection device openings 250. The connection device openings 250 are configured to receive a connection device, such as a bolt, screw, or other suitable fastener, for coupling the electromechanical actuator cartridge 200 to a transmission housing 260, Figure 2 The transmission housing 260 is schematically depicted in FIG. 2. The connection interface can be parallel to the rotational axis 251 of the screw shaft 222.

[0046] A mounting brake 240 can be included (e.g., temporarily included) in the electromechanical actuator cartridge 200. In particular, the mounting brake can be used during installation of the actuator cartridge and then replaced with a plug when the actuator cartridge is in use. The mounting brake 240 can inhibit rotation of the screw shaft 222 during installation of the electromechanical actuator cartridge 200. The mounting brake 240 includes a head 242 that is located outside of the cartridge housing 234 and a brake bolt that is located within the brake bolt opening. The mounting brake 240 will be discussed in more detail below. The cutting plane A-A' represents the cross-sectional view depicted in FIGS. 3-4. Figure 8 The cutting plane B-B' represents the cross-sectional view depicted in FIGS. 5-6. Figure 5 The cutting plane B-B' represents the cross-sectional view depicted in FIGS. 5-6. Figure 8 The cutting plane B-B' represents the cross-sectional view depicted in FIGS. 5-6. Figure 4 The cutting plane B-B' represents the cross-sectional view depicted in FIGS. 5-6. Figure 7 The cutting plane B-B' represents the cross-sectional view depicted in FIGS. 5-6. The cutting plane B-B' represents the cross-sectional view depicted in FIGS. 5-6.

[0047] Figure 4 A cross-sectional view of the electro-mechanical actuator cartridge 200 is shown, including the actuation assembly 204 and the actuation motor 202. The actuation motor 202 and the actuation assembly 204 are arranged such that the actuation motor and the screw shaft 222 are coaxial with one another.

[0048] In the illustrated example, the bearing interface portion 228 encloses a bearing 402 that is coupled to the distal end 404 of the screw shaft 222. The inner race of the bearing 402 can be coupled to the distal end 404 of the screw shaft 222, and the outer race of the bearing 402 can be coupled to the bearing interface portion 228. In the illustrated example, the screw shaft mount 232 encloses a bearing 406 that is coupled to the screw shaft 222 proximate to an end of the screw shaft opposite the distal end 404. The inner race of the bearing 406 can be coupled to the screw shaft 222, and the outer race of the bearing 406 can be coupled to the screw shaft mount 232.

[0049] In Figure 4 the illustrated example, the bearing interface portion 228 includes an opening 407 that can reduce (e.g., eliminate) the chance of an oil or air lock. In other words, the opening 407 reduces the chance that oil or air will become trapped at the interface and cause installation difficulties due to the resulting pressure. The opening 407 (e.g., a cylindrical opening) can be installed in the hole 1013, as shown in Figure 10 However, in other examples, the bearing interface can omit the opening.

[0050] Continuing with Figure 4 the screw shaft mount 232 can include a drain 408 with an opening 409. As shown in Figure 4 the drain 408, and in particular the opening 409, is positioned below the screw shaft 222 with respect to the Y-axis. In addition, the drain opening 409 can be positioned axially between the bearing 406 and the drive motor 202 with respect to the X-axis. The drain 408 is discussed in more detail herein with respect to Figure 7 .

[0051] The screw shaft 222 is rotationally coupled to the actuation motor 202 via a slotted interface. For example, the screw shaft 222 can include a slot 410 that mates with a rotor shaft 412 of the actuation motor 202. In the illustrated example, the rotor shaft 412 is positioned coaxially with the screw shaft 222 to improve the efficiency of the assembly. However, in another example, the rotor shaft and the screw shaft can be parallel or perpendicular to one another. In such a case, a gear, additional shaft, chain, or the like can be used to provide the rotational connection between the motor and the screw shaft, but this can reduce the space efficiency of the actuator cartridge. The mating interface of the screw shaft 222 and the actuation motor 202 is discussed in more detail herein with respect to Figure 5 and Figure 6 .

[0052] Bearing 414 can be coupled to rotor shaft 412. It will be appreciated that another bearing can be coupled to the other side of the rotor shaft relative to the X axis. Additionally, seal 416 can be mounted between the outer surface 418 of the housing 420 of the actuation motor 202 and the inner surface 422 of the screw shaft mount 232. In this manner, the likelihood of lubricant leaking from the actuation assembly is reduced. However, in other examples, the seal within the cartridge can be omitted. Additionally, seal 424 can be mounted between the cartridge housing 234 and the screw shaft mount 232. In this manner, the undesired leakage of lubricant is reduced. The screw shaft mount 232 includes a body 426, which in the illustrated example is located interior to the actuator cartridge housing 234. Additionally, a flange 236 of the screw shaft mount 232 extends radially outward from the body 426. The flange 236 allows the actuation motor 202 and the actuator cartridge housing 234 to be effectively coupled to the screw shaft mount 232. However, other screw shaft mount profiles can be used in other embodiments.

[0053] Due to the interaction between the sleeve and the sleeve guide 224, rotation of the screw shaft 222 causes the sleeve 206 to translate axially in opposite directions 450 and 452. In this manner, rotational movement of the motor causes axial translation of the sleeve, shift device, clutch, etc.

[0054] It will be appreciated that the actuator cartridge 200 can be assembled as a unit prior to installation into the transmission. In particular, the actuation motor 202, screw shaft mount 232, cartridge housing 234, screw shaft 222, sleeve 206, nut 214, sleeve guide 224, and / or bearings 402 and 406 can be assembled as a unit for effective operation when subsequently installed into the transmission. Thus, the actuator cartridge 200 can be effectively assembled prior to insertion into the transmission, such as at a separate location or manufacturing facility. The actuator cartridge can then be effectively installed into the transmission as a unit at a later time, thereby improving assembly efficiency. Additionally, fewer tools can be required to install the actuator cartridge into the transmission when installed as a unit than when the actuator cartridge components are individually installed into the transmission. Furthermore, if desired, the use of the actuator cartridge in this manner can allow it to be installed in a transmission structure where space is limited. The actuator cartridge can also be more efficiently serviced and replaced when pre-assembled as a unit. Thus, the appeal to customers can also be increased.

[0055] Figure 4 The bridge 226 of the cartridge housing 234 is again shown extending between the bearing interface portion 228 and the housing body 230 of the housing (relative to the X axis). The sleeve guide 224 is located below the bridge 226 (relative to the Y axis), although other sleeve guides can be used.

[0056] The electromechanical actuator cartridge 200 can also include an O-ring 238 positioned in a groove 241 in the flange 243 of the cartridge housing 234. Thus, the groove 241 can accommodate the O-ring 238 to function as a face seal. A face seal can be desirable because the actuator does not require an axial force to assemble like a piston / radial seal, and the actuator can still be easily rotated into an assembled position before fastener assembly and tightening once it is axially installed.

[0057] Figure 5 The screw shaft 222 of the electromechanical actuator cartridge 200 is shown positioned in the screw shaft mount 232. The screw shaft 222 includes a slot 410 for connecting to the shaft of an actuation motor (e.g., the actuation motor 202 in FIG. 4). Figure 2

[0058] The screw shaft 222 can include a portion with a flat surface 504 positioned proximate to the end 502 of the screw shaft. In some examples, the screw shaft 222 can include multiple flat surfaces 504. In other examples, the screw shaft 222 can include one or more openings or grooves that are contoured to mate with a mounting detent to substantially prevent relative movement between the mounting detent and the screw shaft. In this way, mounting efficiency of the actuator cartridge 200 can be improved by reducing the opportunity for misalignment between the shift fork pad and the gap in the actuator cartridge sleeve. In an example, the mounting detent 240 includes a detent bolt 506 having a distal end 508. In addition, in the illustrated example, the detent bolt 506 passes through the actuator cartridge housing 234 and the screw shaft mount 232 such that the distal end 508 of the detent bolt extends from the screw shaft mount toward the screw shaft 222. In addition, the distal end 508 can contact one of the flat surfaces 504 of the screw shaft 222 such that the detent bolt 506 and the screw shaft are coplanarly engaged. Thus, the detent bolt 506 can prevent rotation of the screw shaft 222. In other examples, the distal end of the detent bolt can mate with an opening or groove on the shaft to prevent rotation thereof.

[0059] The screw shaft mount 232 can include a recessed area 510. The end 502 of the screw shaft 222 can be positioned within at least a portion of the opening 512 relative to the X-axis. Thus, the opening 512 positioned in the recessed area 510 allows the slot 410 of the screw shaft 222 to connect to the shaft of the actuation motor. In addition, the recessed area 510 can be configured to engage a portion of the actuation motor 202.

[0060] Figure 6 ​A cross-sectional view of the shaft 412 of the drive motor 202 and a portion 602 is shown. The portion 602 can circumferentially surround the shaft 412, while a recessed area 604 can be located between the portion 602 and the shaft. In the illustrated example, the portion 602 can match the recessed area 510 of the actuator housing 208 in Figure 5 Other motor and actuator housing profiles can also be used.

[0061] In the illustration, the shaft 412 extends outward from the drive motor 202. In addition, the shaft 412 can extend further outward relative to the X-axis than the portion 602 of the drive motor 202. The shaft 412 includes an extension 606 that can match the slot 410 of the actuator housing 208 in Figure 5 Thus, the extension 606 can have a rectangular cross-section relative to the y-z plane. When mated with the slot 410, the extension 606 of the shaft 412 can transmit rotational torque from the drive motor 202 to the actuator assembly 204. In this manner, the slot 410 and the extension 606 allow the drive motor 202 to rotate the screw shaft 222 and adjust the axial position of the sleeve 206 in the nut 214. Figure 2 Other interfaces between the motor shaft and the screw shaft can also be used in other embodiments. For example, the shafts can be connected by a flange, a press-fit interface, a weld, a combination thereof, or the like.

[0062] Figure 7 A cross-sectional view of the screw shaft 222 and the screw shaft mount 232 is shown. In addition, the actuator housing 200 includes a drain conduit 408 in the illustrated example. The drain conduit 408 includes an opening 409 and a portion 706. The opening 409 of the drain conduit 408 is located in a recess 708 of the screw shaft mount 232 and below the screw shaft 222 relative to the Y-axis. In addition, the opening 409 can be proximate to the drive motor 202 relative to the X-axis. The recess 708 forms a space around the screw shaft 222 proximate to the end 710 of the screw shaft.

[0063] In the illustrated example, the portion 706 is positioned at an angle relative to the Y-axis. In particular, the angle is downward, and the portion 706 extends below the bearing 406 to keep lubricant away from the drive motor. The portion 706 is fluidly coupled to the opening 409 so that lubricant from the bearing 406 can enter the opening 409 and flow through the portion 706. The downward angle of the portion 706 (relative to the Y-axis) allows the lubricant to drain by gravity through the drain conduit 408 and away from the drive motor 202. For example, lubricant (e.g., oil) can be delivered to the bearing 406 on the outside 712 of the bearing. Some of the lubricant then passes through the bearing 406 to the inside 714 of the bearing and into the cavity 716 around the screw shaft 222. The lubricant then enters the opening 409 of the drain conduit 408 and flows out of the conduit opening 718 to drain the lubricant away from the drive motor 202.

[0064] In this way, the leakage conduit 408 can direct lubricating oil (e.g., from the bearing 406) away from the actuation motor 202 and reduce the likelihood of the lubricating oil flooding the actuation motor.

[0065] Figure 8 An installation brake 240 is shown coupled to the screw shaft 222. The installation brake 240 includes a brake bolt 506. The brake bolt 506 extends through the cartridge housing 234 and the screw shaft mount 232 through a brake bolt opening 802. A distal end 508 of the brake bolt 506 can contact a flat 504 on the screw shaft 222, such that the brake bolt and screw shaft are coplanarly contacted. Thus, when the brake bolt 506 is installed in the actuator cartridge 200, the screw shaft 222 can be prevented from rotating. Once the electromechanical actuator cartridge 200 is installed within the transmission, the installation brake 240 can be removed from the actuator cartridge and a plug can be fitted to the brake bolt opening 802. In this way, the installation brake 240 can maintain the position of the sleeve 206 in the electromechanical actuator cartridge 200 during installation of the electromechanical actuator cartridge 200 into the transmission, and the plug can prevent debris and / or lubricant from passing through the brake bolt opening 802 during operation of the transmission. The installation brake 240 makes the electromechanical actuator cartridge 200 easier to install as a single assembly, particularly into transmissions where packaging space is limited. Figure 2

[0066] Figure 9 An electromechanical actuator cartridge 200 is shown prior to installation into a transmission housing. The transmission housing is omitted from the figure to more clearly illustrate the electromechanical actuator cartridge 200 and a shift device 902. In the illustrated example, the shift device 902 is a shift fork. In detail, in one example, the shift fork can be designed to translate. In another example, the shift fork can be designed to rotate about an axis.

[0067] In an example, the shift fork 902 includes a shift fork pad 904. The shift fork pad 904 can be positioned within the gap 212 of the sleeve 206. The shift fork pad 904 can mate with the gap 212, such that the shift fork 902 is coupled to the sleeve 206. During installation of the actuator cartridge 200, the cartridge can be axially translated (e.g., relative to the x-axis) toward the shift fork 902 to position the shift fork pad 904 within the gap 212. As previously described, after the axial translation, the actuator cartridge housing can be rotated to secure the shift fork pad 904 in the shift device groove 208. The pad 904 is shown as passing through a wall 905 of the shift fork 902 to ensure secure installation of the pad. In other examples, however, the shift fork pad can mate with a groove in the shift fork without passing completely through the wall.

[0068] Figure 9 ​The main body 230 of the bridge 226, bearing interface portion 228, and housing 234 is shown again. The bridge 226 includes an outer surface 906 and a side surface 908. The bearing interface portion 228 includes a cut 910 (e.g., an arcuate cut) to allow the fork pad 904 to be quickly inserted into the gap 212 of the sleeve 206. However, in other examples, the cut may be omitted, the diameter of the bearing interface portion may be reduced, etc.

[0069] Figure 10 The shift fork pad 904 of the shift fork 902 is shown. Figure 2 The sleeve 206 of the electromechanical actuator housing 200 is aligned. For example, the shift fork pad 904 can be aligned with... Figure 9 The gaps 212 shown are aligned. The shift fork 902 can be positioned within the transmission housing 1002. For example, the shift fork 902 can be positioned relative to the x-axis between the mounting portion 1004 of the transmission housing 1002 and the housing portion 1006 of the transmission housing. The mounting portion 1004 may include connection openings 1008, each opening being sized to accommodate at least a portion of a connection device (e.g., a bolt, screw, etc.). The connection device can pass through... Figure 2 The connecting device opening 250 and the connecting device opening 1008 are used to connect the device to the device. Figure 2 The electromechanical actuator box 200 is connected to the transmission housing 1002. Installation Figure 2 When the electromechanical actuator box 200 is in the middle, the mounting surface 1009 of the mounting part 1004 can be in coplanar contact with the surface of the actuator box housing 234.

[0070] like Figure 10 As shown, the mounting portion 1004 includes an opening 1010, the size of which can accommodate Figure 2 The actuation assembly 204 of the electromechanical actuator box 200. For example, during installation of the electromechanical actuator box in the transmission housing 1002, the actuation assembly can be axially translated through the opening 1010, such as... Figure 10 As shown. Furthermore, in some examples, the actuation motor may bypass the opening 1010, allowing the actuation motor and actuation assembly to be positioned on opposite sides of the mounting portion 1004 relative to the X-axis. The axial translation of the opening 1010 allows for rapid installation of the electromechanical actuator assembly into the transmission housing 1002, improving assembly efficiency. Additionally, if needed, the electromechanical actuator box 200 can be easily removed from the transmission housing 1002 for maintenance and replacement by axial translation, without requiring the removal of other transmission components from the vehicle. This simplifies transmission maintenance.

[0071] The shift fork pad 904 shown in the figure is 180° from the center shaft 1012, which can be coaxial with the rotational axis of the screw shaft when the actuator cartridge is installed in the transmission case. However, the shift fork can have other suitable positions.

[0072] Figure 13A A detailed view of the shift fork 902 with the shift fork pad 904 is shown. A clip 1300 can be used to secure the pad in the hole 1302 of the shift fork. The clip 1300 can secure the pad in the fork hole, preventing the fork pad 904 from accidentally moving axially during installation. The clip 1300 can be a press-in clip that is pressed in from the side, or a snap ring. The shift fork 902 can also include a raised step 1304 to prevent the pad from rotating. Without the raised step, in some cases the pad can be inadvertently contacted by a nut during installation of the actuator, causing it to rotate out of the correct orientation. Thus, the raised step 1304 can keep the pad in place during assembly. Figure 13B A detailed view of the shift fork pad 904 is shown. The shift fork pad 904 includes a stem portion 1350 and a pad portion 1352.

[0073] Figure 11 An electromechanical actuator cartridge 200 is shown installed into a transmission case housing. The transmission case housing is omitted in the figure to more clearly show the electromechanical actuator cartridge 200 and the shift fork 902. In addition, a connecting device 1102 can connect the electromechanical actuator cartridge 200 to the transmission case housing. For example, the connecting device 1102 can pass through a connecting device opening 250 in the insert actuator cartridge outer housing 234 and into the transmission case housing (e.g., into a connecting device opening 1008 in the transmission case housing) to securely install the electromechanical actuator insert cartridge 200 to the transmission case housing. In some examples, the connecting device 1102 can be a bolt or screw. Figure 10

[0074] In the illustrated example, the shift fork pad 904 is positioned within the shift device groove 208 of the sleeve 206. Thus, the shift fork 902 can interface with the sleeve 206, allowing axial movement of the sleeve to cause axial movement of the shift fork. For example, during operation of the drive motor 202, the sleeve 206 and the shift fork 902 can move synchronously parallel to the x-axis. The shift fork pad 904 can be positioned within the shift device groove 208 by rotation of the electromechanical actuator cartridge 200 about the x-axis. Thus, the gap 212 can be moved out of axial alignment with the shift fork pad 904, which can be positioned within the shift device groove 208.

[0075] Once the electromechanical actuator cartridge 200 is mated with the shift fork 902, Figure 10 the installation brake 240 in the electromechanical actuator cartridge 200 can be engaged by Figure 11 ​A plug 1104 described above in the middle is substituted instead. The plug 1104 can be positioned within the brake bolt opening 802 and can reduce the likelihood of debris and / or lubricant entering and exiting the brake bolt opening. The plug 1104 does not contact the screw shaft 222, allowing the screw shaft to rotate, the nut 214 and the sleeve 206 to translate axially along the screw shaft. An O-ring 238 in the electromechanical actuator cartridge 200 is shown in the illustrated example.

[0076] Figure 12 is a method 1200 of installing an actuator cartridge into a transmission. In one example, the method 1200 can be used to install the electromechanical actuator cartridge 200 described above. However, in other examples, the method 1200 can also be used to install other suitable actuator cartridges into a transmission. At least a portion of the method steps can be performed by a human installer. Additionally, or in the alternative, at least a portion of the method steps can be performed by a machine, which can be at least partially automated and include a controller that can store the steps as instructions and execute the instructions as control commands by a processor.

[0077] At 1202, the method 1200 includes inserting an installation brake into the actuator cartridge so as to connect with a screw shaft of an actuation assembly. The actuator cartridge can include an opening configured to receive at least a portion of the installation brake. Additionally, the opening can extend through a screw shaft seat of the actuation assembly such that the opening extends inward from an outer surface of the actuator cartridge to the screw shaft. At least a portion of the installation brake can be positioned within the opening. Additionally, an end of the installation brake can interface with a flat surface of the screw shaft. In this way, the installation brake can prevent the screw shaft from rotating due to the end of the installation brake contacting the flat surface of the screw shaft. By preventing the screw shaft from rotating, the position of the sleeve and nut of the actuator cartridge on the screw shaft can be fixed and the actuator cartridge can be easier to install into a transmission housing by reducing the number of freely moving components on the actuator cartridge.

[0078] At 1204, the method 1200 includes aligning a shift fork pad of a shift fork with a gap of a sleeve of an actuation assembly. The gap of the sleeve can be configured to receive the shift fork pad of the shift fork. For example, the gap can be positioned on the sleeve so as to insert the shift fork pad into the gap through axial movement of the actuator cartridge and / or the sleeve. The shift fork pad and the gap of the sleeve can be axially aligned by adjusting the position of the actuator cartridge relative to the shift fork. For example, the shift fork can already be installed in the transmission and the actuator cartridge can be aligned with the shift fork while all or a portion of the position of the actuator cartridge is outside of the transmission housing.

[0079] At 1206, the method 1200 includes axial translation of the actuator cartridge. Thus, once the gap of the sleeve is aligned with the shift fork pad, the entire actuator assembly (e.g., the actuation assembly and the actuation motor) can be translated axially towards the shift fork. The actuator cartridge can be translated until the shift fork pad is positioned within the gap of the sleeve. Further, the actuator cartridge can also be translated until a portion or all of the actuator cartridge is positioned within the transmission housing.

[0080] At 1208, the method 1200 includes rotating the actuator cartridge to move the gap of the actuation assembly sleeve to be radially aligned with the shift fork pad. The actuator cartridge can be rotated about a longitudinal axis of the shift fork. Thus, the gap of the sleeve can be rotated to a position that is not aligned with the shift fork pad, which can be positioned with a shift device groove. The configuration of the shift device groove can prevent axial movement of the sleeve relative to the shift fork pad. For example, any axial movement of the sleeve along the screw shaft of the actuator cartridge can result in axial movement of the shift fork pad in the same direction. As such, the sleeve can be used to adjust the position of the shift fork pad, and thus the actuator cartridge can be used to adjust the clutches of the transmission through the shift fork. By axial translation and rotation of the actuator cartridge, the shift fork pad is mated with the sleeve of the actuator cartridge, thereby reducing the installation complexity of the actuator cartridge. Further, the actuator cartridge can be kept axially aligned with the shift fork during installation, thereby reducing the packaging space required in the transmission housing to install the actuator cartridge.

[0081] At 1210, the method 1200 includes securing the actuator cartridge to the transmission housing with a coupling device. The coupling device can be used to couple the actuator cartridge with the transmission housing. Thus, the position of the actuator cartridge can be fixed relative to the transmission housing, and the actuation motor can be used to adjust the position of the shift fork through rotation of the screw shaft after the installation brake is removed.

[0082] At 1212, the method 1200 includes replacing the installation brake with a plug. Once the actuator cartridge is installed, the installation brake can no longer be required in the actuator cartridge. Thus, the installation brake can be removed, allowing the screw shaft to rotate under the actuation of the motor. Further, the rotation of the screw shaft can adjust the axial position of the nut and the sleeve, which in turn adjusts the position of the shift fork. In turn, the shift fork can change the gear ratio of the transmission through the clutches (e.g., dog clutches).

[0083] The present application will be further described below. In one aspect, an electromechanical actuator cartridge is provided that includes an actuation assembly and an actuation motor rotationally coupled to the actuation assembly. The actuation assembly includes a sleeve that includes a shift device groove extending at least partially around the sleeve, the groove configured to axially capture an extension of a shift device, and a plurality of gaps extending from an axial side of the sleeve to the shift device groove.

[0084] In another aspect, a method for installing an electromechanical actuator cartridge is provided, the method comprising aligning a pair of grooves in a cartridge sleeve with shift fork tabs in a transmission shift fork, axially translating the electromechanical actuator cartridge to move the shift fork tabs through the pair of grooves and into fork tab grooves in the sleeve, and rotating the electromechanical actuator cartridge to move the pair of grooves into radial alignment with the shift fork tabs.

[0085] In another aspect, an electromechanical ball screw actuator cartridge is provided, comprising a ball screw assembly including a sleeve connected to or integrated with a nut, the nut being threadably connected to a screw shaft and an actuation motor. The sleeve includes a fork pad slot extending circumferentially around the sleeve, the slot being configured to axially capture a shift fork pad and a pair of gaps extending from axial sides of the sleeve to the fork pad slot.

[0086] In any of the above aspects or combinations of aspects, the sleeve can be connected to or integrated with a nut, the nut being threadably connected to a screw shaft, the screw shaft being rotationally connected to a drive motor.

[0087] In any of the above aspects or combinations of aspects, the electromechanical actuator cartridge can further comprise a mounting brake configured to prevent rotation of the screw shaft and being removably connected to the actuator cartridge housing.

[0088] In any of the above aspects or combinations of aspects, the mounting brake can comprise a brake bolt passing through the actuator cartridge housing and the screw shaft seat, a distal end of the brake bolt being in contact with a flat on the screw shaft.

[0089] In any of the above aspects or combinations of aspects, the electromechanical actuator cartridge can further comprise a sleeve guide connected to the actuator cartridge housing and configured to prevent rotation of the sleeve and the nut during actuation of the electromechanical actuator cartridge.

[0090] In any of the above aspects or combinations of aspects, the sleeve guide can be connected to a bridge extending between a bearing interface portion of the actuator cartridge housing and a main body of the actuator cartridge housing, the bearing interface portion of the actuator cartridge housing comprising a bearing connected to a distal end of the screw shaft and the main body of the actuator cartridge housing comprising a screw shaft mounting seat.

[0091] In any of the above aspects or combinations of aspects, the actuation motor and the screw shaft can be coaxially positioned with respect to each other.

[0092] In any of the above aspects or combinations of aspects, the electromechanical actuator cartridge can further comprise a screw shaft mounting seat at least partially enclosed within the actuator cartridge housing, wherein the screw shaft mounting seat comprises a drain channel configured to receive oil from a bearing coupled to the screw shaft and to drain the oil in a direction away from the actuation motor.

[0093] In any of the above aspects or combinations of aspects, the screw shaft can be rotationally coupled to the drive motor via a slotted interface.

[0094] In any of the above aspects or combinations of aspects, the shift device can be a shift fork, wherein the shift fork includes shift fork pads that mate with the plurality of gaps.

[0095] In any of the above aspects or combinations of aspects, the electromechanical actuator cartridge can further include a cartridge housing, the housing including a plurality of connection device openings configured to receive a plurality of connection devices configured to connect to the transmission housing.

[0096] In any of the above aspects or combinations of aspects, the electric motor can be a brushless direct current (DC) electric motor.

[0097] In any of the above aspects or combinations of aspects, the method of installation can further include, prior to aligning the pair of grooves, installing an installation brake in the electromechanical actuator cartridge, wherein the installation brake is configured to prevent rotation of the screw shaft in the electromechanical actuator cartridge.

[0098] In any of the above aspects or combinations of aspects, the ball screw electromechanical actuator cartridge can further include an installation brake, the brake including a brake bolt extending through a brake bolt opening in the actuator cartridge housing, wherein the brake bolt includes a distal end that contacts the planar surface of the screw shaft.

[0099] In any of the above aspects or combinations of aspects, the ball screw electromechanical actuator cartridge can further include an oil drain conduit having an inlet opening to the periphery of the screw shaft bearing and an outlet that directs oil away from the actuation motor.

[0100] In any of the above aspects or combinations of aspects, the ball screw electromechanical actuator cartridge can further include an actuator cartridge housing having a brake bolt opening and a plug that mates with the brake bolt opening.

[0101] In any of the above aspects or combinations of aspects, the ball screw electromechanical actuator cartridge can further include a sleeve guide coupled to the actuator cartridge housing that prevents rotation of the sleeve and the nut during actuation of the ball screw electromechanical actuator cartridge, wherein the sleeve guide is coupled to a bridge that extends between a bearing interface portion of the actuator cartridge housing that encloses the bearing coupled to the distal end of the screw shaft and a main body of the actuator cartridge housing that encloses the screw shaft mount.

[0102] In any of the above aspects or combinations of aspects, the bridge can not circumferentially enclose the pair of slots.

[0103] In another method of representation, a ball screw shift fork actuator is provided that includes an actuator unit that includes a motor that is rotationally coupled to a threaded shaft that is threadably engaged with a nut assembly that includes an axial slot that opens into a circumferential groove and has a profile that receives a shift fork shim.

[0104] Figures 2-11 and Figures 13A-13B Except for schematic depictions of components, these components are drawn to scale. However, in other embodiments, these components can have different relative sizes.

[0105] Figures 1-11 and 13A-13B show example configurations of relative positioning of various elements. If elements shown in the figures are in direct contact or direct coupling with each other, then these elements can be respectively referred to as in direct contact or direct coupling, at least in one example. Likewise, elements shown as abutting or adjacent to each other can be respectively referred to as abutting or adjacent to each other, at least in one example. For example, elements in face-to-face contact with each other can be referred to as in face-to-face contact. As another example, elements that are separately positioned from each other with only space in between and no other elements can be referred to as separately positioned from each other, at least in one example. As yet another example, elements shown above / below each other, to the sides of each other, or to the left / right of each other with respect to each other can be referred to as such elements, with respect to each other. Further, as shown in the figures, a topmost element or element point can be referred to as the "top" of the element, and a bottommost element or element point can be referred to as the "bottom" of the element, at least in one example. Top / bottom, upper / lower, above / below as used herein can be with respect to a vertical axis in the figures, for describing positioning of elements in the figures with respect to each other. Thus, an element shown above other elements can be vertically positioned above the other elements, in one example. As yet another example, shapes of elements depicted in the figures can be referred to as having those shapes (e.g., circular, linear, planar, curved, rounded, chamfered, beveled, or similar shapes). Further, elements shown intersecting each other can be referred to as intersecting elements or as intersecting each other, at least in one example. Moreover, an element shown within another element or shown outside another element can also be referred to as an intersecting element, in one example.

[0106] The following claims particularly point out certain combinations and subcombinations that are regarded as novel and nonobvious. These claims can refer to "an" element or to "a first" element or to "said first" element or to "one" element or to "another" element or to "an another" element or to "the first" element, meaning any of the elements by that name. Such claims have as their scope all elements of the claims following the comma, either in this claim or in a dependent claim, and they invoke the limitations of the elements following the comma by that name in their own claim or in any other claim so long as that claim properly invokes the limitation. The claims as set forth below cover all combinations of those elements following the comma, not just the specific combination of elements recited.

Claims

1. An electromechanical actuator cartridge, characterized by comprising an actuation assembly comprising: a sleeve comprising a shift device groove extending at least partially circumferentially around the sleeve, the shift device groove for axially capturing an extended portion of a shift device; and a plurality of gaps extending axially from the sleeve to the shift device groove; and an actuation motor rotationally coupled to the actuation assembly.

2. The electro-mechanical actuator cartridge of claim 1, wherein, The sleeve is connected to or in conjunction with a nut that is threadably connected to a screw shaft that is rotationally connected to the actuation motor.

3. The electro-mechanical actuator cartridge of claim 2, wherein, Further comprising a mounting brake for: preventing rotation of the screw shaft; and being removably connected to the actuator cartridge housing.

4. The electromechanical actuator cartridge of claim 3, wherein: the mounting brake comprises a brake bolt that passes through the actuator cartridge housing and a screw shaft seat; and a distal end of the brake bolt contacts a flat on the screw shaft.

5. The electro-mechanical actuator cartridge of claim 2, wherein, Further comprising a sleeve guide connected to the actuator cartridge housing that prevents rotation of the sleeve and the nut during actuation of the actuator cartridge.

6. The electro-mechanical actuator cartridge of claim 5, wherein, The sleeve guide is connected to a bridge that extends between: a bearing interface portion of the actuator cartridge housing that contains a bearing connected to a distal end of the screw shaft; and a main body of the actuator cartridge housing that contains a screw shaft seat; 7. The electro-mechanical actuator cartridge of claim 2, wherein, The actuation motor and the screw shaft are coaxially positioned with respect to each other.

8. The electro-mechanical actuator cartridge of claim 2, wherein, Further comprising a screw shaft seat that is at least partially enclosed within the actuator cartridge housing; wherein the screw shaft seat comprises a drain conduit configured to: receive oil from a bearing coupled to the screw shaft; and drain the oil away from the actuation motor.

9. The electro-mechanical actuator cartridge of claim 2, wherein, The screw shaft is rotationally coupled to the actuation motor via a slotted interface.

10. The electro-mechanical actuator cartridge of claim 1, wherein, The shift device is a shift fork comprising a shift fork pad that mates with the plurality of gaps.

11. The electro-mechanical actuator cartridge of claim 1, wherein, Further comprising an actuator cartridge housing comprising a plurality of connection device openings that receive a plurality of connection devices that connect to a transmission housing.

12. The electro-mechanical actuator cartridge of claim 1, wherein, The actuation motor is a brushless direct current (DC) motor.

13. The electro-mechanical actuator cartridge of claim 2, wherein, Further comprising a sleeve guide connected to the actuator cartridge housing that prevents rotation of the sleeve and the nut during actuation of the ball screw electromechanical actuator cartridge; wherein the sleeve guide is connected to a bridge that extends between: a bearing interface portion of the actuator cartridge housing that contains a bearing connected to a distal end of the screw shaft; and a main body of the actuator cartridge housing that contains a screw shaft seat; wherein the bridge does not surround the pair of gaps.

14. The electro-mechanical actuator cartridge of claim 13, wherein, Further comprising a drain conduit comprising: an inlet that is in communication with an opening around the screw shaft bearing; and an outlet that directs oil away from the actuation motor.

15. The electro-mechanical actuator cartridge of claim 1, wherein, Further comprising: a mounting brake comprising a brake bolt passing through a brake bolt opening in the actuator box housing, wherein the brake bolt comprises a distal end which contacts a flat on the screw shaft; a brake bolt opening in the actuator box housing; and / or a plug which matches the brake bolt opening.

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