Implement carrier with integrated power take-off

Abstract

An attachment system for a power machine includes an implement carrier (710) having an implement carrier plate (714) with a PTO aperture (734). A locking lever (802) is rotatably mounted on the implement carrier and is configured to be rotated between locked and unlocked positions to move locking pins (804). A bearing (730) is configured to couple to a PTO shaft (724) from the power machine. A first PTO coupler (732) is supported by the bearing and aligned with the PTO aperture. The implement carrier is configured such that rotation of the locking lever to the locked position moves the first PTO coupler forward toward or through the PTO aperture to an engagement position in which the first PTO coupler can be engaged with a second PTO coupler (740) on the interface of the implement.

Description

IMPLEMENT CARRIER WITH INTEGRATED POWER TAKE-OFFBACKGROUND

[0001] Power machines, for the purposes of this disclosure, include any type of machine that generates power for the purpose of accomplishing a particular task or a variety of tasks. One type of power machine is a work vehicle. Work vehicles are generally self-propelled vehicles that have a work device, such as a lift arm (although some work vehicles can have other work devices) that can be manipulated to perform a work function. Work vehicles include excavators, loaders, utility vehicles, tractors, and trenchers, to name a few examples.

[0002] To power the various movements of a power machine, or have functionality of powered implements, a hydraulic system is commonly used to provide pressurized hydraulic fluid to the actuator of each function. Conventionally, the hydraulic systems of work vehicles have been powered using internal combustion engines as the power source. However, increasingly, there are efforts to produce work vehicles that utilize batteries as the primary power source. The batteries are used to power electric actuators, such as an electric motor. The electric motor can be used to power a hydraulic system, which in turn powers hydraulic actuators. Alternatively, the hydraulic system can in some instances be replaced with additional electric actuators to perform the various work functions.

[0003] The discussion above is merely provided for general background information and is not intended to be used as an aid in determining the scope of the claimed subject matter.SUMMARY

[0004] In one aspect, an attachment system for a power machine includes an implement carrier configured to be mounted to the power machine and having an implement carrier plate configured be placed into contact with a bracket of an interface on an implement to mount the implement on the power machine. The implement carrier includes a power take-off (PTO) aperture in the implement earner plate. A locking lever is rotatably mounted on the implement carrier and is configured to be rotated between locked and unlocked positions to move locking pins which lock the implement carrier and the interface together. A bearing is coupled to a power machine side of the implement carrier and is configured to couple to a PTO shaft from the power machine. A first PTO coupler of the attachment system on the power machine side of the implement carrier issupported by the bearing and aligned with the PTO aperture. The implement carrier is configured such that rotation of the locking lever to the locked position moves the first PTO coupler forward toward or through the PTO aperture to an engagement position in which the first PTO coupler can be engaged with a second PTO coupler on the interface of the implement. Rotation of the locking lever to the unlocked position moves the first PTO coupler rearward toward the power machine to a disengaged position in which the first PTO coupler cannot be engaged with the second PTO coupler.

[0005] In another aspect, a method of connecting a power source of a power machine to a tool of an implement is provided. The method includes providing an implement carrier on the power machine, with the implement carrier comprising: an implement carrier plate having a power takeoff (PTO) aperture; a locking lever configured to be rotated between locked and unlocked positions to move locking pins; a bearing coupled to a power machine side of the implement carrier and configured to couple to a PTO shaft from the power machine; and a first PTO coupler on the power machine side of the implement carrier supported by the bearing and aligned with the PTO aperture. The method further includes providing an interface assembly on the implement, with the interface assembly comprising: a bracket configured to be positioned in contact with the implement carrier plate; and a second PTO coupler. The method further includes moving the implement carrier and the interface assembly together and rotating the locking lever to the locked position to move the locking pins to lock the implement carrier and interface assembly together, and to move the first PTO coupler forward toward or through the PTO aperture to an engagement position in which the first PTO coupler engages with the second PTO coupler.

[0006] In another aspect, a system comprises an implement carrier and an attachment assembly. The implement carrier is configured for mounting to a machine having a power source. The implement carrier comprises a first portion of a jaw clutch and a first power take-off shaft connected to the first portion of the jaw clutch; the first power take-off shaft is configured for power transmission connection to the power source. The attachment assembly is configured for mounting to an implement. The attachment assembly comprises a second portion of the jaw clutch, a pulley assembly, a second power take-off shaft and a biasing element. The second portion of the jaw clutch is configured for power transmission connection to the first portion of the jaw clutch. The pulley assembly comprises a drive pulley operably connected to the second portion of the jaw clutch and a driven pulley connected by a belt to the drive pulley. The second power take-off shaftextends from the driven pulley and is configured to transmit power from the pulley assembly to a tool of the implement. The biasing element is disposed intermediate the second portion of the jaw clutch and the pulley assembly.

[0007] In another aspect, a method of connecting a power source of a machine to a tool of an implement is described. The method comprises providing an implement carrier on the machine and providing an attachment assembly on the implement. The implement carrier comprises a first portion of a jaw clutch and a first power take-off shaft connected to the first portion of the jaw clutch, wherein the first power take-off shaft is configured for power transmission connection to the power source. The attachment assembly comprises a second portion of the jaw clutch, a pulley assembly and a second power take-off shaft. The second portion of the jaw clutch is configured for power transmission connection to the first portion of the jaw clutch. The pulley assembly comprises a drive pulley operably connected to the second portion of the jaw clutch and a first driven pulley connected by a belt to the drive pulley. The second power take-off shaft extends from the first driven pulley and is configured to transmit power from the pulley assembly to the tool. The method comprises moving the implement carrier and the attachment assembly together, thereby compressing a biasing element disposed intermediate the second portion of the jaw clutch and the pulley assembly, until the first portion of the jaw clutch couples with the second portion of the jaw clutch.

[0008] This summary is provided to introduce concepts in simplified form that are further described below in the Detailed Description. This summary is not intended to identify key features or essential features of the disclosed or claimed subject matter and is not intended to describe each disclosed embodiment or every implementation of the disclosed or claimed subject matter. Specifically, features disclosed herein with respect to one embodiment may be equally applicable to another. Further, this summary is not intended to be used as an aid in determining the scope of the claimed subject matter. Many other novel advantages, features, and relationships will become apparent as this description proceeds. The figures and the description that follow more particularly exemplify illustrative embodiments.BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The disclosed subject matter will be further explained with reference to the attached figures, wherein like structure or system elements are referred to by like reference numeralsthroughout the several views. All descriptions are applicable to like and analogous structures throughout the several embodiments, unless otherwise specified.

[0010] With reference to a particular power machine or implement, the “front” is regarded as a forward facing aspect of a power machine relative to its forward direction of travel, or of an implement as it would be mounted on a power machine. The “rear” would generally be the aspect of an implement carrier or implement facing an operator positioned at the operator station, such as for the illustrated examples in which an implement is attached to a front of a power machine. However, there are exceptions; for example, it is to be understood that in some uses, such as with the power machine 100 configured as a compact tractor 500 shown in FIGS. 37-39, the implement carrier 210 is located at a rear of the power machine 100.

[0011] FIG. 1 is a block diagram illustrating functional systems of a representative power machine on which embodiments of the present disclosure can be practiced.

[0012] FIG. 2 is a front perspective view of a power machine in the form of a utility vehicle.

[0013] FIG. 3 is a front top perspective view of an exemplary implement carrier of the utility vehicle.

[0014] FIG. 4 is a rear perspective view of the exemplary implement carrier.

[0015] FIG. 5 is a rear perspective view of an implement in the form of an angle broom.

[0016] FIG. 6 is a top view of the angle broom.

[0017] FIG. 7 is a top and real' perspective view of an attachment assembly of the angle broom.

[0018] FIG. 8 is a bottom front perspective of the attachment assembly of the angle broom.

[0019] FIG. 9 is a front perspective view of the pulley box of the angle broom, with one side of the housing removed.

[0020] FIG. 10 is a rear perspective view of the pulley box of FIG. 9, with the housing shown as transparent so that interior parts are visible.

[0021] FIG. 11 is a rear perspective view of the pulley box of FIGS. 9 and 10.

[0022] FIG. 12 is a diagram showing the relationship between pulley diameters and a drive ratio.

[0023] FIG. 13 is a rear perspective view of an implement configured as a mower.

[0024] FIG. 14 is a front perspective view of an attachment assembly of the mower.

[0025] FIG. 15 is a front perspective view of the pulley box of FIG. 14, with four walls of the housing removed.

[0026] FIG. 16 is a rear perspective view of the mower pulley box.

[0027] FIG. 17 is a rear perspective view of an implement configured as a snow blower.

[0028] FIG. 18 is a front perspective view of a portion of the snow blower, including the attachment assembly.

[0029] FIG. 19 is a top view of the attachment assembly.

[0030] FIG. 20 is a rear perspective view of a pulley box for the snow blower.

[0031] FIG. 21 is a front perspective view of the snow blower pulley box with a wall removed therefrom.

[0032] FIG. 22 is a side elevation view partially showing a power machine on the left positioned at a distance from an implement on the right, configured as a snow blower.

[0033] FIG. 23 is a side elevation view showing a portion of the implement carrier on the left and a pulley box of the implement on the right.

[0034] FIG. 24 is a side elevation view, partially showing the implement carrier of the power machine approaching the implement at an angle.

[0035] FIG. 25 is a side elevation view showing a portion of the implement carrier approaching the pulley box of the implement at an angle.

[0036] FIG. 26 is a side elevation view showing the portion of the power machine and the implement fully mated and attached.

[0037] FIG. 27 shows the power take off of the power machine operably attached to the pulley box of the implement.

[0038] FIG. 28 is a partial front perspective view of some components of the implement carrier.

[0039] FIG. 29 is a partial rear perspective view of some components of an implement pulley box.

[0040] FIG. 30 is a top view of the power take off of the power machine operably connected to the pulley box of an implement, wherein the housing is not shown.

[0041] FIG. 31 is a front perspective view of a power machine configured as a utility work machine.

[0042] FIG. 32 is a top and front perspective view of an implement carrier of the utility work machine.

[0043] FIG. 33 is a partial side elevation view showing an upward tilt of the implement carrier.

[0044] FIG. 34 is a partial side elevation view of the implement carrier in a downward tilted position.

[0045] FIG. 35 is a front perspective view of a power machine configured as an articulating tractor.

[0046] FIG. 36 is a front perspective view of the implement carrier of the articulating tractor.

[0047] FIG. 37 is a rear perspective view of a power machine configured as a compact tractor.

[0048] FIG. 37A is a partial side perspective view of the power machine of FIG. 37, showing a rear power take-off.

[0049] FIG. 37B a partial side perspective view of the power machine of FIG. 37, showing a mid-mount power take-off.

[0050] FIG. 38 is a rear perspective view of an implement carrier of the compact tractor.

[0051] FIG. 39 is a front perspective view of the implement carrier of the compact tractor.

[0052] FIG. 40 is a front perspective view of a power machine configured as a stand on vehicle.

[0053] FIGs. 41-42 are perspective views of another implement carrier embodiment providing a PTO output.

[0054] FIGs. 43-44 are perspective views of an implement interface configured to mount an implement to a power machine having the implement carrier of FIGs. 41-42.

[0055] FIGs. 45-48 are perspective and side views of PTO couplers of the implement carrier shown in FIGs. 41-42 and the implement interface shown in FIGs. 43-44.

[0056] FIGs. 49-53 are perspective view illustrations of the implement carrier of FIGs. 41-42 and including automatic PTO coupling and decoupling features.

[0057] FIGs. 54-56 are side view illustrations of the automatic PTO coupling features between the implement carrier of FIGs. 41-42 and the implement interface of FIGs. 43-44.

[0058] FIGs. 57-59 are rear view illustrations of an embodiment of the implement carrier shown in FIGs. 41-42, including powered locking / unlocking features which automatically couple / decouple PTO couplers.

[0059] FIGs. 60-61 are illustrations of an example utility vehicle power machine, broom implement, and implement interface providing PTO coupling to the implement.

[0060] FIGs. 62-66 are illustrations of implement side components of the implement interface shown in FIGs. 60-61, including a pulley box providing configurability of the RPM output and optionally providing a drop down of the PTO output shaft.

[0061] While the above-identified figures set forth one or more embodiments of the disclosed subject matter, other embodiments are also contemplated, as noted in the disclosure. In all cases, this disclosure presents the disclosed subject matter by way of representation and not limitation. It should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that fall within the scope of the principles of this disclosure.

[0062] The figures may not be drawn to scale. Moreover, where terms such as above, below, over, under, top, bottom, side, right, left, vertical, horizontal, etc., are used, it is to be understood that they are used only for ease of understanding the description. It is contemplated that structures may be oriented otherwise.DETAILED DESCRIPTION

[0063] The concepts disclosed in this discussion are described and illustrated with reference to exemplary embodiments. These concepts, however, are not limited in their application to the details of construction and the arrangement of components in the illustrative embodiments and are capable of being practiced or being carried out in various other ways. The terminology in this document is used for the purpose of description and should not be regarded as limiting. Words such as “including,” “comprising,” and “having” and variations thereof as used herein are meant to encompass the items listed thereafter, equivalents thereof, as well as additional items. Unless indicated otherwise, ordinal numbers (e.g., first, second, third, etc.) are used to distinguish or identify different elements or steps in a group of elements or steps and do not supply a serial or numerical limitation on the elements or steps of the embodiments thereof. For example, "first," "second," and "third" elements or steps need not necessarily appear in that order, and the embodiments thereof need not necessarily be limited to three elements or steps. Unless indicated otherwise, any labels such as "left," "right," "front," "back," "top," "bottom," "forward," "reverse," "clockwise," "counter clockwise," "up," "down," or other similar terms such as "upper," "lower," "aft," "fore," "vertical," "horizontal," "proximal," "distal," "intermediate" and the like are used for convenience and are not intended to imply, for example, any particular fixed location, orientation, or direction. Instead, such labels are used to reflect, for example, relative location, orientation, or directions. The singular forms of "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Unless specified or limited otherwise, the terms “mounted,”“connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings.

[0064] The disclosed concepts can be practiced on various power machines, as will be described below. A representative power machine on which the embodiments can be practiced is illustrated in diagram form in FIG. 1 and examples of such a power machine are illustrated in the following drawing figures. For the sake of brevity, only a few power machines are discussed. However, as mentioned above, the embodiments below can be practiced on any of a number of power machines, including power machines of different types from the representative power machines illustrated. Power machines, for the purposes of this discussion, include a frame, at least one work element, and a power source that is capable of providing power to the work element to accomplish a work task. One type of power machine is a self-propelled work vehicle. Self- propelled work vehicles are a class of power machines that include a frame, work element, and a power source that is capable of providing power to the work clement. At least one of the work elements is a motive system for moving the power machine under power.

[0065] Referring now to FIG. 1, a block diagram illustrates the basic systems of a power machine 100 upon which the embodiments discussed below can be advantageously incorporated and can be any of a number of different types of power machines. The block diagram of FIG. 1 identifies various systems on power machine 100 and the relationship between various components and systems. As mentioned above, at the most basic level, a power machine 100 for the purposes of this discussion includes a frame 110, a power source 120, and a work element 130. An exemplary power machine 100 also has tractive elements 140, which are themselves work elements provided to move the power machine over a support surface. An operator station 150 provides an operating position for controlling the work elements of the power machine. A control system 160 is provided to interact with the other systems to perform various work tasks at least in part in response to control signals provided by an operator.

[0066] Certain work vehicles have work elements that are capable of performing a dedicated task. For example, some work vehicles have a lift arm to which an implement such as a bucket is attached such as by a pinning arrangement. The work element, i.e., the lift arm can be manipulated to position the implement for performing the task. The implement, in some instances can be positioned relative to the work element, such as by rotating a bucket relative to a lift arm, to further position the implement. Under normal operation of such a work vehicle, the bucket is intended tobe attached for use. Such work vehicles may be able to accept other implements by disassembling the implement / work element combination and reassembling another implement in place of the original bucket. Some work vehicles are intended to be used with a wide variety of implements and have an implement interface such as implement interface 170 shown in FIG. 1. At its most basic, implement interface 170 is a connection mechanism between the frame 110 or a work element 130 and an implement 180, which can be as simple as a connection point for attaching an implement 180 directly to the frame 110 or a work element 130 or more complex, as discussed below.

[0067] On some power machines, implement interface 170 can include an implement carrier 210 (shown for example in FIG. 2), which is a physical structure attached to a work element 130. The implement carrier 210 has engagement features and locking features to accept and secure any of a number of implements 180 to the work element 130. One characteristic of an exemplary implement carrier 210 is that once an implement 180 is fixed to it, when the implement carrier 210 is moved with respect to the work element 130, the implement 180 moves with the implement carrier 210. In an exemplary embodiment, implement carrier 210 is a dedicated device specifically intended to accept and be secured to various different implements 180. In an exemplary embodiment, the implement carrier 210 itself is mountable to a work element 130 such as a lift arm or to the frame 110. Implement interface 170 can also include one or more power sources for providing power to one or more tools 284 (such as a cutting blade, auger, rotating brush, or blower, for example) on an implement 180. Some power machines can have a plurality of work elements with implement interfaces, each of which may, but need not, have an implement carrier for receiving implements. Some other power machines can have a work element with a plurality of implement interfaces so that a single work element can accept a plurality of implements simultaneously. Each of these implement interfaces can, but need not, have an implement carrier.

[0068] Frame 110 includes a physical structure that can support various other components that are attached thereto or positioned thereon. The frame 110 can include any number of individual components. Some power machines have frames that are rigid; that is, no part of the frame is movable with respect to another pail of the frame. Other power machines have at least one portion that is capable of moving with respect to another portion of the frame. For example, excavators can have an upper frame portion that rotates with respect to a lower frame portion. Other workvehicles have articulated frames such that one portion of the frame pivots with respect to another portion for accomplishing steering functions.

[0069] Frame 110 supports the power source 120, which is capable of providing power to one or more work elements 130 including the one or more tractive elements 140, as well as, in some instances, providing power for use by an attached implement 180 via implement interface 170. Power from the power source 120 can be provided directly to any of the work elements 130, tractive elements 140, and implement interfaces 170. Alternatively, power from the power source 120 can be provided to a control system 160, which in turn selectively provides power to the elements that are capable of using it to perform a work function. In exemplary embodiments, power source 120 includes an electrical power source or a combination of power sources, known generally as hybrid power sources. Power source 120 is capable of providing power to a power takeoff (PTO) 226 in exemplary disclosed embodiments. A power source can include an internal combustion engine; alternatively, a power source can be a hydraulic motor, an electric generator, or other types of engines, or in some cases, the engine can be a collection of one or more power sources, such as an internal combustion engine and an electric generator having batteries, such as can be found in so-called hybrid vehicles. The power source typically also includes power conversion components such as an electric motor powered by the battery packs. In some exemplary embodiments, such power conversion components also include one or more hydraulic pumps powered by the engine or electric motor to provide pressurized hydraulic fluid for a hydraulic system including hydraulic actuators. In alternative embodiments, no hydraulic system is included and all actuators on the power machine are electric actuators. In yet other specific embodiments, the power machine may include a combination of electric actuators that power tractive elements and / or elements of a work group (e.g., slew motor), and an electric motor that powers a hydraulic pump to provide pressurized hydraulic fluid for one or more hydraulic actuators of the workgroup and / or tractive elements.

[0070] FIG. 1 shows a single work element designated as work element 130, but various power machines can have any number of work elements. Work elements are typically attached to the frame of the power machine and movable with respect to the frame when performing a work task. In addition, tractive elements 140 are a special case of work element in that their work function is generally to move the power machine 100 over a support surface. Tractive elements 140 are shown separate from the work element 130 because many power machines have additional work elementsbesides tractive elements, although that is not always the case. Power machines can have any number of tractive elements, some or all of which can receive power from the power source 120 to propel the power machine 100. Tractive elements can be, for example, wheels attached to an axle, track assemblies, and the like. Tractive elements can be rigidly mounted to the frame such that movement of the tractive element is limited to rotation about an axle or steerably mounted to the frame to accomplish steering by pivoting the tractive element with respect to the frame.

[0071] Power machine 100 includes an operator station 150, which provides a position from which an operator can control operation of the power machine. In some power machines, the operator station 150 is defined by an enclosed or partially enclosed cab. Some power machines on which the disclosed embodiments may be practiced may not have a cab or an operator compartment of the type described above. For example, a walk behind loader may not have a cab or an operator compartment, but rather an operating position that serves as an operator station from which the power machine is properly operated. More broadly, power machines other than work vehicles may have operator stations that are not necessarily similar to the operating positions and operator compartments referenced above. Further, some power machines such as power machine 100 and others, whether or not they have operator compartments or operator positions, may be capable of being operated remotely (i.e., from a remotely located operator station) instead of or in addition to an operator station adjacent or on the power machine. This can include applications where at least some of the operator controlled functions of the power machine can be operated from an operating position associated with an implement that is coupled to the power machine. Alternatively, with some power machines, a remote control device can be provided (i.e. remote from both of the power machine and any implement to which is it coupled) that is capable of controlling at least some of the operator controlled functions on the power machine.

[0072] FIGS. 2-4 illustrate a utility vehicle 200 (without its tractive elements such as wheels), which is one particular example of a power machine 100 of the type illustrated in FIG. 1, on which the disclosed power connection system can be employed. A particularly suitable utility vehicle is Model UV34, commercially available from Bobcat Company of West Fargo, North Dakota. FIGS. 31-34 illustrate a utility work machine 300 (without a cargo box and its rear wheels), which is another particular example of a power machine 100 of the type illustrated in FIG. 1, on which the disclosed power connection system can be employed. A particularly suitable utility work machine is the H-Series UW53 Toolcat™ machine, commercially available from Bobcat Company of WestFargo, North Dakota. FIGS. 35 and 36 illustrate an articulating tractor 400, which is another particular example of a power machine 100 of the type illustrated in FIG. 1, on which the disclosed power connection system can be employed. A particularly suitable articulating tractor is the AT450 machine, commercially available from Bobcat Company of West Fargo, North Dakota. FIGS. 37-39 illustrate a compact tractor 500 (without its wheels), which is another particular example of a power machine 100 of the type illustrated in FIG. 1, on which the disclosed power connection system can be employed. A particularly suitable compact tractor is the CT2025 machine, commercially available from Bobcat Company of West Fargo, North Dakota. FIG. 40 illustrates a stand-on vehicle 600, which is another particular example of a power machine 100 of the type illustrated in FIG. 1, on which the disclosed power connection system can be employed.

[0073] FIGS. 5-11 illustrate an angle broom implement 700, which is one particular example of an implement 180 attachable to power machine 100 at implement interface 170. FIGS. 13-16 illustrate a mower implement 800, which is another particular example of an implement 180 attachable to power machine 100 at implement interface 170. FIGS. 17-21 illustrate a snow blower implement 900, which is another particular example of an implement 180 attachable to power machine 100 at implement interface 170. Other suitable powered implements include, without limitation, a rotary cutter, brush saw, chipper, grapple, planer, soil conditioner, spreader, clamp, mulcher, tiller, trencher, brush cutter, seeder, and breaker, for example.

[0074] Unless specifically noted otherwise, the described concepts can be practiced on a variety of power machines 100 and with a variety of implements 180, with the described embodiments presented only for illustrative purposes. This disclosure is directed to a power connection system having a common implement interface 170 that can be used with a wide variety of power machines 100 and a wide variety of implements 180 to connect a power take off 226 of the power machine 100 to power consuming tools 284 (such as a cutting blade, auger, rotating brush, or blower, for example) of the implements 180 without any manual connection by an operator. By moving a power machine 100 into contact with the implement 180 in a specified manner, as shown in FIGS. 22-30, the power structures are operably connected together while the operator remains at the operator station 150. This is in contrast to conventional power take off connections, which generally require an operator to leave the operator station 150, which is generally a cab or standing platform, and move to the area of the implement carrier to connect thepower structures manually. Such manual tasks can be difficult for operators with limited mobility and can result in pinched fingers and other discomfort from bending or reaching.

[0075] In the described system, once the power drive ratios of the power machine 100 and implement 180 are made compatible by configuration of an implement pulley box 246, as discussed below, the operator can make the power take off attachments between the power machine 100 and the implement 180 entirely from the operator station 150 without additional manual wrangling. Moreover, the described system provides a common implement interface 170 to allow many different power machines 100 to work with many different implements 180, thereby allowing an operator much more versatility in the type of work tasks that can be accomplished with a particular power machine 100. This is in contrast to the current state of the art, wherein only certain machines 100 are compatible with certain implements 180 because of structures of their couplers and rotational drive requirements.

[0076] FIGS. 2 and 3 arc front perspective and partial front perspective views, respectively, of an exemplary power machine 100 configured as a utility vehicle 200 with an exemplary implement carrier 210 mounted thereon. FIG. 4 is a rear perspective view of the implement carrier 210. FIGS. 5-11 show an exemplary implement 180 or portions thereof, wherein this embodiment is configured as an angle broom implement 700. In an exemplary embodiment, each implement 180 has an attachment assembly 212 mounted thereon, wherein the attachment assembly 212 is configured for mating with an implement carrier 210 of any power machine 100, by relative motion of the power machine 100 with respect to the implement 180, as shown in FIGS. 22-30 and further described below.

[0077] As shown in FIGS. 2-4, in an exemplary embodiment, the implement carrier 210 has a configuration that can be referred to as a “three point” implement carrier, wherein the bracket 214 has two primary connection points to the power machine 100 at pivoting connections 216 to arms 218. A third connection point 220 at a top of bracket 214 is provided for connection to implement 180. A power take off (PTO) 226 includes shaft 222, which extends between power source 120 of the power machine 100 and a PTO shaft 224 mounted on implement carrier 210.

[0078] Power takeoff (PTO) 226 is coupled to power source 120 and provides a rotational power for power machine 100 that can be operably coupled to an implement 180 to power the implement 180. In an exemplary embodiment, shaft 222 is coupled to the clutch of the power source 120 through a universal joint 228. In some embodiments, shaft 222 is configured as anextendable cardan shaft 274 (see FIGS. 32-34 and 39) to allow for movement of the implement carrier 210 relative to the frame 110 or work element 130 of a power machine 100. A suitable cardan shaft is commercially available from KTR Systems GmbH of Rheine, Germany.

[0079] As shown in FIG. 4, in an exemplary embodiment, a PTO shaft 224 is provided on a rear side of the implement carrier plate 215 and is coupled to the plate 215 by a pair of bearings 230. As shown in FIG. 28, in an exemplary embodiment, the bearings 230 are pillow block bearings that accept the PTO shaft 224 and secure it to plate 215 of implement carrier 210.

[0080] In an exemplary embodiment, on a front side of implement carrier 210, a first portion of 232 of a jaw clutch 234 extends from a pillow block bearing 230. Pins 236 also extend forward from the pillow block bearing 230. A suitable jaw clutch coupling is available as a model L Type Standard Jaw Coupling from Lovejoy, Inc. of Downers Grove, Illinois.

[0081] FIGS. 5-11 show an implement 180 configured as an angle broom implement 700 with an exemplary attachment assembly 212 mounted thereon to allow the implement 180 to be used with any power machine 100 on which implement carrier 210 is operably mounted. In an exemplary embodiment, attachment assembly 212 includes flange 238 into which an attachment is made by insertion of connector rib 220 of implement carrier 210. Moreover, in an exemplary embodiment, attachment assembly 212 includes a second portion 240 of jaw clutch 234. As shown in FIGS. 5 and 29, in an exemplary embodiment, the second portion 240 of jaw clutch 234 is mounted to the pillow block bearings 230 with a biasing element, which in one case is a compression spring 242, therebetween. Pin receivers 244 are positioned to receive pins 236 of implement carrier 210.

[0082] FIGS. 5-11 show pulley box 246 that can be mounted to plate 248 of attachment assembly 212 and / or can be mounted to bracket 250 of attachment assembly 212. As shown in FIG. 8, PTO shaft 252 extends from a front pillow block bearing 230 of pulley box 246 and connects by universal joint 228 to shaft 254 of implement 180. FIG. 9 shows a front perspective view of pulley box 246 with one wall removed therefrom so that its components are visible. FIG. 10 shows a rear’ perspective view of pulley box 246, with the housing depicted as transparent so that components can be seen. FIG. 11 is a rear perspective view of the pulley box 246. In an exemplary embodiment, pulley box 246 includes a door 256 that can be opened at latch 258 to swing open about hinge 260 to allow for changing a drive ratio of the pulley mechanism in orderto configure the implement 180 to be driveably compatible with the power source 120 of power machine 100.

[0083] When the implement carrier 210 of power machine 100 is operably attached to the attachment assembly 212 of implement 180 (by joining the two portions 232, 240 of jaw clutch 234), the PTO 226 of the power machine 100 connects to drive pulley 262 in pulley box 246. Rotational power from drive pulley 262 is transferred to driven pulley 264 by belt 266. The driven pulley 264 thereby transfers its rotational power through PTO shaft 252 to the implement 180. Where a drive ratio between the drive pulley 262 and the driven pulley 264 is not correct for a particular implement 180 to be attached to a particular power machine 100, the ratio can be changed with the disclosed pulley boxes 246. For example, referring to FIG. 12, if the power source 120 of the power machine 100 produces an output of 3,600 rotations per minute (RPM) but the implement 180 has a power requirement of 2,000 RPM, an appropriate adjustment can be made by changing a size of the driven pulley 264 relative to the size a drive pulley 262. In this case, for a drive pulley 262 that has a diameter of 2 - 1 / 8 inch, a driven pulley 264 having a diameter of 3 - 3 / 16 inch results in an appropriate drive ratio to lower the driving RPM to a implement compatible driven RPM. Those of skill in the art will recognize that similar calculations can be made for different RPM requirements of the various power machines 100 and implements 180 to be operably coupled together with the disclosed implement carrier 210 on power machine 100 and attachment assembly 212 on implement 180.

[0084] In an implementation where the driven pulley 264 is not of the desired size, one can configure the pulley box 246 in an exemplary method for providing drive ratio compatibility. To change the drive ratio, a user opens the pulley box 246 at door 256 and loosens tensioner 268, which will allow the user to pivot tension roller 270 away from belt 266. With belt 266 thus loosened, the user can pull driven pulley 264 off its splined shaft 252 and replace it with a driven pulley 264 of the desired size. Reverse steps are completed to reengage the pulley components. These include, in an exemplary method, placing the belt 266 around the replacement driven pulley 264, pivoting the tension roller 270 into contact with the belt 266, tightening the tensioner 268, and closing and latching door 256 of pulley box 246.

[0085] By providing any of a variety of implements 180 with a configurable pulley box 246 in which the drive ratios can be made compatible with any power source 120 of a power machine 100, any of a variety of machines 100 can be used with any of a variety of implements 180 throughmutual connections of their respective implement carrier 210 and attachment assembly 212. The specifics in the structural components of attachment assembly 212 may vary depending upon the structural features and work functions of a particular implement 180. For example, as shown in FIGS. 5-8, an implement 180 configured as an angle broom 700 is designed to pivot in the horizontal plane, as illustrated in FIG. 6.[00861 FIGS. 13-16 show an implement 180 configured as a mower implement 800. As shown in FIG. 14, in an exemplary embodiment, and extendable double cardan 274 connects the pulley box 246 and gear box 276. The front arm 278 of a commercially available mower implement 800 may also be modified as shown to accommodate the attachment assembly 212 and its pulley box 246. FIGS. 17-21 illustrate an implement 180 useable in the described system and configured as a snow blower implement 900.

[0087] As described and shown in the illustrated embodiments, any of a variety of implements 180 can be fitted with the attachment assembly 212 in order to have an integrated power take off assembly upon attachment to an implement carrier 210 of a power machine 100. Thus, the details of operation that are common to all these different embodiments is not repeated; it is to be understood that the described system is designed so that the components operate in a consistent and compatible manner. Thus, while there may be small changes in particular structures of the pulley box 246 from one implement to another in order to accommodate different structural features and work functions of those different implements, the operation and changing of the driven pulley is similar for each of these implements, and descriptions relative to one embodiment are also applicable to other embodiments unless otherwise stated.

[0088] FIGS. 22 and 23 show partial side elevation views of a power machine 100 on a left side and an implement 180 on a right side, with their respective implement carriers 210 and attachment assembly 212 positioned in proximity to each other for imminent attachment together. FIG. 23 is a closer side elevation view of the first portion 232 of jaw clutch 234 on the left and second portion 240 of jaw clutch 234 on the right, along with selected surrounding structural members. Some of the structures of the power machine and the implement are not shown so as to not obscure the connection mechanism.

[0089] As shown in FIGS. 24 and 25, the power machine 100 on the left approaches the implement 180 on the right so that connector rib 220 at a top of implement carrier 210 fits under flange 238 and into a pocket 239 (see FIGS. 5, 7, 13 and 17) between flange 238 and bracket 250of attachment assembly 212. The downwardly sloping bracket rails 241 guide the connector rib 220 laterally into a centered position in pocket 239. Nearly simultaneously, the pins 236 of implement carrier 210 couple with the pin receivers 244 of the attachment assembly 212, also guiding the lateral alignment of implement carrier 210 and attachment assembly 212. Meanwhile, the first and second portions 232, 240 of jaw clutch 234 also come into contact. In an exemplary embodiment, the second portion 240 of the jaw clutch is spring-loaded relative to plate 215 or pulley box 246 of attachment assembly 212. As the first and second portions 232, 240 of jaw clutch 234 are pressed together, the angled spiders 282 on the complementary portions 232, 240 slide against each other, and against the biasing force of compression spring 242, rotating against each other until the spiders 282 slide into their seated, coupled position, as shown in FIG. 30.

[0090] As shown in FIGS. 26-29, several structural components of the power coupling system provide for automatic coupling of the PTO shaft 224 of the power machine 100 to the PTO shaft 252 of the implement 180 without any manual operator interaction. Such structures include the top connections of the implement carrier 210 and the attachment assembly 212 at connector rib 220 and pocket 239 at flange 238; the mating spiders 282 of the portions 232, 240 of jaw clutch 234; the pins 236 and pin receivers 244; the compression of spring 242, which allows the jaw clutch portions 232, 240 to find their seat as the jaw clutch portions come together; and the pillow block bearings 230 and rubber bushings 280 provided on each side of plate 215, 248 between the plate 215, 248 and a pillow block bearing 230. Some flexibility in the rubber bushing arrangement corrects for minor misalignment. Suitable rubber bushings 280 are commercially available from GMT Rubber-Metal-Technic Ltd. of West Yorkshire, United Kingdom. As shown in FIGS. 28 and 29, corners of pillow block bearings 230 not occupied by pins 236 or pin receivers 244 can be secured to their respective plate 215, 248 by fastener assemblies 272 including a nut, bolt and washer, for example.

[0091] As discussed above, various implements 180, exemplary embodiments of which are illustrated as an angle broom implement 700, a mower implement 800, and a snow blower implement 900, can be structurally modified to accommodate the disclosed attachment assembly 212 and configurable pulley box 246. Similarly, various power machines 100 can also be modified to mount an implement carrier 210 in order to operably couple with a wide variety of implements 180. For example, FIGS. 31-34 show views of a utility work machine 300 with an implement carrier 210 that is able to pivot upward and downward. As shown in FIGS. 32-34, the shaft 274and the arms 218 all telescope to accommodate the tilt by extension and contraction. FIGS. 35 and 36 show views of an articulating tractor 400 fitted with an implement carrier 210 of the disclosure. FIGS. 37-39 illustrate a compact tractor 500, wherein the implement interface 210 is located on a rear of the power machine. FIG. 40 illustrates a power machine 100 as a stand- on vehicle 600 having the disclosed implement carrier 210.[00921 As shown in FIGS. 37A and 37B, some power machines 100, such as compact tractor 500 for example, have both a rear power take-off 226r and a mid-mount power take-off 226m. As shown in FIG. 37, implement carrier 210 is attached to the rear power take-off 226r. While not specifically illustrated, an implement carrier 210 can also be mounted to the front of tractor 500 and operably attached to mid-mount power take-off 226m, using appropriate joints, cardans, gears and shafts. In one embodiment, the mid- mount power take-off 226m runs at a speed of about 2,000 rpm, while the rear-mount power take-off 226r runs at about 540 rpm. With the disclosed system, the same implement, such as a mower implement 800 for example, can be attached to the front of the tractor 500 on a three-point implement carrier 210, or attached to the rear of the tractor on a three-point implement carrier 210, using a hands-free operation including approaching the implement 180 / mower 800 with the implement carrier 210 at an angle, as shown in FIGS. 24 and 25. Using an appropriately sized driven pulley 264 in reconfigurable pulley box 246 (as explained above with reference to FIG. 12, for example), an implement 180, 700, 800, 900 can be made compatible with different PTOs having significantly different drive speeds.

[0093] Exemplary, non-limiting embodiments of a system and method are described. In an exemplary embodiment, a system comprises an implement carrier 210 and an attachment assembly 212. The implement carrier 210 is configured for mounting to a machine 100, 200, 300, 400, 500, 600 having a power source 120. In an exemplary embodiment, the implement carrier 210 comprises a first portion 232 of a jaw clutch 234 and a first power take-off shaft 222, 224, 274 connected to the first portion 232 of the jaw clutch 234. The first power take-off shaft 222, 224, 274 is configured for power transmission connection to the power source 120. In an exemplary embodiment, an attachment assembly 212 is configured for mounting to an implement 180, 700, 800, 900. In an exemplary embodiment, the attachment assembly 212 comprises a second portion 240 of the jaw clutch 234, a pulley assembly 246, a second power take-off shaft 252, 254, 274 and a biasing element 242. The second portion 240 of the jaw clutch is configured for power transmission connection to the first portion 232 of a jaw clutch. The pulley assembly 246comprises a drive pulley 262 operably connected to the second portion 240 of the jaw clutch and a driven pulley 264 connected by a belt 266 to the drive pulley 262. The second power take-off shaft 252, 254, 274 extends from the driven pulley 264 and is configured to transmit power from the pulley assembly 246 to a tool 284 of the implement 180, 700, 800, 900. The biasing element 242 is disposed intermediate the second portion 240 of the jaw clutch and the pulley assembly 246. [00941 In an exemplary embodiment, the implement carrier 210 comprises a connector rib 220 configured for insertion into a pocket 239 of the attachment assembly 212. In an exemplary embodiment, the pocket 239 comprises a flange 238 extending from a bracket 250 and bordered by first and second rails 241. In an exemplary embodiment, one of the implement carrier 210 and of the attachment assembly 212 comprises a pin receiver 244, and the other of the implement carrier 210 and of the attachment assembly 212 comprises a pin 236 configured for partial insertion into the pin receiver 244.

[0095] In an exemplary embodiment, the implement carrier 210 is configured for mounting to the machine 100, 200, 300, 400, 500, 600 at first and second pivot connections 216. In an exemplary embodiment, the biasing element 242 is a compression spring. In an exemplary embodiment, at least one of the first power take-off shaft and of the second power take-off shaft comprises an extendable cardan 274.

[0096] In an exemplary embodiment, the first portion 232 of the jaw clutch and the first power take-off shaft 222, 224, 274 are connected through a plate 215. In an exemplary embodiment, a bearing 230 is attached to the plate 215, through which the first portion 232 of the jaw clutch or the first power take-off shaft 222, 224, 274 extends. In an exemplary embodiment, a bushing 280 is disposed between the bearing 230 and the plate 215. In an exemplary embodiment, the first portion 232 of the jaw clutch comprises a first plurality of projections 282, and the second portion 240 of the jaw clutch comprises a second plurality of projections 282. In an exemplary embodiment, the first plurality of projections 282 are configured to mate with the second plurality of projections 282 to operably couple the first and second portions 232, 240 of the jaw clutch 234 for power transmission.

[0097] An exemplary method of connecting a power source 120 of a machine 100, 200, 300, 400, 500, 600 to a tool 284 of an implement 180, 700, 800, 900 is described. In an exemplary embodiment, the method comprises providing an implement carrier 210 on the machine 100, 200, 300, 400, 500, 600 and providing an attachment assembly 212 on the implement 180, 700, 800,900. In an exemplary embodiment, the implement carrier 210 comprises a first portion 232 of a jaw clutch 234 and a first power take-off shaft 222, 224, 274 connected to the first portion 232 of the jaw clutch, wherein the first power take-off shaft 222, 224, 274 is configured for power transmission connection to the power source 120. In an exemplary embodiment, the attachment assembly 212 comprises a second portion 240 of the jaw clutch, a pulley assembly 246 and a second power take-off shaft 252, 254, 274. The second portion 240 of the jaw clutch 234 is configured for power transmission connection to the first portion 232 of the jaw clutch 234. In an exemplary embodiment, the pulley assembly 246 comprises a drive pulley 262 operably connected to the second portion 240 of the jaw clutch and a first driven pulley 264 connected by a belt 266 to the drive pulley 262. In an exemplary embodiment, the second power take-off shaft 252, 254, 274 extends from the first driven pulley 264 and is configured to transmit power from the pulley assembly 246 to the tool 284. In an exemplary embodiment, the method comprises moving the implement carrier 210 and the attachment assembly 212 together, thereby compressing a biasing element 242 disposed intermediate the second portion 240 of the jaw clutch and the pulley assembly 246, until the first portion 232 of the jaw clutch couples with the second portion 240 of the jaw clutch.

[0098] An exemplary method comprises inserting a connector 220 of the implement carrier 210 into a pocket 239 of the attachment assembly 212. In an exemplary embodiment, inserting the connector 220 into the pocket 239 comprises centering the connector 220 between first and second rails 241 of the attachment assembly 212. An exemplary method comprises partially inserting a pin 236 of one of the implement carrier 210 and of the attachment assembly 212 into a pin receiver 244 of the other of the implement carrier 210 and of the attachment assembly 212. An exemplary method comprises attaching the implement carrier 210 to the machine 100, 200, 300, 400, 500, 600 at first and second pivot connections 216. In an exemplary embodiment, the first portion 232 of the jaw clutch comprises a first plurality of projections 282, and the second portion 240 of the jaw clutch comprises a second plurality of projections 282. An exemplary method comprises mating the first plurality of projections 282 with the second plurality of projections 282 to operably couple the first and second portions 232, 240 of the jaw clutch 234 for power transmission.

[0099] An exemplary method comprises removing the first driven pulley 264 from the pulley assembly 246 and attaching the belt 266 to a second driven pulley 264, wherein the first and second driven pulleys 264 have different diameters. An exemplary method comprises opening a door 256of the pulley assembly 246 before removing the first driven pulley 264 and closing the door 256 after attaching the second driven pulley 264 to the belt 266. An exemplary method comprises moving a tension roller 270 away from the belt 266 before removing the first driven pulley 264 and moving the tension roller 270 toward the belt 266 after attaching the belt 266 to the second driven pulley 264.[001001 Referring now to FIGS. 41-56, shown are features of another common interface embodiment which can be used with power machines and implements or attachments. For example, the features of the power machine implement carrier and of the implement or attachment interfaces are particularly advantageous for use with ground maintenance equipment (GME). The interface can support auto connecting of PTO couplers, and optionally includes RPM adjustment features such as those discussed above for other disclosed embodiments. Providing a common implement carrier interface for GMEs and corresponding implements, which may have different PTO output speeds (RPMs), is particularly advantageous.

[0101] FIGs. 41-42 are respectively power machine side and implement or attachment side perspective views of an implement carrier 710 configured to be mounted to a power machine 100 and having some features which are similar to other disclosed embodiments such as implement carrier 210 described above. FIGs. 43-44 are respectively implement or attachment side and power machine side perspective views of an interface 712 which is configured to be secured to an implement and to couple the implement to the implement carrier 710, and thereby the power machine.

[0102] Implement carrier 710 includes a bracket or plate 714 which connects to the power machine through arms 718. Interface 712 includes a bracket or plate 750 and a flange 738 at the top of the bracket 750. A top interface edge or connector rib 720 of the bracket 714 of implement carrier 710 is configured to be received under the flange 738 of interface 712. Implement carrier 710 and interface 712 are configured as a Bob-Tach®’ (BT) style of mount of the implement to the power machine. After engaging top interface edge 720 of implement carrier 710 with flange 738, the implement carrier is lifted (and optionally tilted rearward under power if the power machine provides the capability), which causes the implement to rotate toward the power machine to position at least a portion of plate 714 against plate 750 and to align locking pins 804 of the implement carrier with locking apertures 806 of interface 712. As in some conventional BT style mounts, handles or levers 802 on the implement carrier are then rotated to lower locking pins 804through locking apertures 806 to lock the implement carrier 710 and the interface 712 together. To unlock and allow the implement to be removed from the power machine, levers 802 are rotated in the opposite direction from their locking rotation motion to raise locking pins 804. Movement of levers 802 can be manually or automatically controlled using known actuators and techniques.

[0103] The implement carrier 710 and interface 712 connection provides advantageous mounting results due to several factors. The BT geometry is configured such that when implement carrier 710 and interface 712 are in coupling position and the locking pins are engaged, the implement carrier and interface are taper locked to each other, which provides superior clearance and wear resistance. Also, another feature of this interface is the use of an A-frame geometry. This allows for enhanced attachment capability. If the attachment is on uneven ground or at a slightly different angle, the A-frame geometry allows the implement carrier to hook a top of the implement attachment side interface such that when the implement carrier is lifted by the power machine, the implement interface sclf-ccntcrs on the implement carrier. On a traditional BT style mount, it is necessary to be approximately centered between the left and right sides when hooking up an attachment. Implement carrier 710 has angled surfaces 808 which taper from top interface edge 720 to side surfaces 810. This A-frame geometry provides a narrow width interface which is advantageous for small GME machines and implements or attachments. The A-frame geometry also assists in self-centering the PTO couplers described below.

[0104] Implement carrier 710 also includes connections for a power takeoff (PTO), such as PTO 226 described above, coupled to a power source and providing a rotational power for power machine 100 that can be operably coupled to an implement to power the implement. Power machine components such as shaft 222 and universal joint 228 are not separately illustrated in FIGs. 41-44, but can be as described above. A PTO shaft 724 is provided on a rear side of the implement carrier bracket or plate 714 and is coupled to the plate by bearings 730. The bearings accept the PTO shaft 724 and secure it to plate 714 of implement carrier 710.

[0105] In an exemplary embodiment, on a front side of implement carrier 710, a PTO coupler 732 is extendable from bearings 730 through an aperture 734 in the implement carrier plate 714. The PTO coupler 732 is shown in greater detail in FIGs. 46-48. A corresponding PTO coupler 740 is positioned behind plate 750 of interface 712, and is accessible through aperture 742 in the plate. The PTO coupler 740 is shown in greater detail in FIGs. 45 and 47-48. The PTO coupler 740 is coupled to a shaft 744 which is configured to rotate and power functions on the implement. Aswill be described in further detail with reference to FIGs. 49-56, implement carrier 710 includes features which align and automatically attach PTO couplers 732 and 740 when levers 802 are moved to the locked position, and automatically decouple PTO couplers 732 and 740 when levers 802 are moved to the unlocked position. The automatic attachment and detachment are particularly useful in power machines which do not have implement carrier tilt capability, as without the described features the PTO couplers can experience binding when attempting to couple and decouple the PTO couplers.

[0106] As shown in the perspective and cross-sectional side views of FIG. 45, the implement or attachment PTO coupler 740 includes a pilot feature 824 at the center of the coupler and multiple spaced bolts or members 822 and corresponding bushings 820 extending from a surface of the coupler 740. As shown in the perspective and cross-sectional side views of FIG.46, the implement carrier PTO coupler 732 includes a centered pilot aperture 828 configured to receive the pilot feature 824 (as shown in the perspective and cross-sectional side views of FIGs. 47-48) for selfalignment when coupling the PTO couplers 732 and 740. The PTO coupler 732 also has multiple spaced apart apertures 826 configured to receive respective ones of the bolts 822 and bushings 820 such that rotation of PTO coupler 732 on the power machine causes rotation of PTO coupler 740 on the implement. The bushings 820 can be polyurethane or other materials which have dampening properties to dampen vibration and shock loading during startup. The symmetrical positioning of the bolts provides improved serviceability and auto connect capability.

[0107] Referring now to FIGs. 49-56, shown are perspective and diagrammatic side view illustrations of features of some disclosed embodiments which automatically couple and decouple the PTO couplers 732 and 740. As shown for example in FIG. 49-53, a linkage 852 is coupled by pivot connection 854 to one of levers 802, and by pivot connection 856 to a PTO wedge 858. As the lever 802 pivots about a pivot connection 850, the linkage moves wedge 858. Wedge 858 includes one or more ramps or angled surfaces 860 as shown in FIGs. 50 and 52. With the levers 802 in a locked state as shown in FIGs. 50 and 51, the wedge is slid away from the PTO coupler 732 by linkage 852, and the spring-loaded coupler 732 will extend through the plate or bracket 714 and into the implement or attachment to couple to the PTO coupler 740 to transmit power. With the levers 802 moved to an unlocked state as shown in FIGs. 52 and 53, the wedge 858 is slid into a position which causes contact between angled surfaces 860 and a portion of the coupler 732, retracting the PTO coupler 732 away from the PTO coupler 740, thus automaticallydecoupling the PTO couplers. FIGs. 54-56 illustrate this automatic PTO coupling as interface 712 is in the process of being mounted to implement carrier 710 to mount an implement (not fully shown) to the power machine (not shown). In FIG. 54, implement carrier 710 is being positioned with interface edge 720 moving into position under flange 738. Due the unlocked position of levers 802, the PTO coupler 732 of the implement carrier is retracted by the wedge 858. FIG. 55 illustrates the implement carrier 710 and interface 712 in a coupled but unlocked position, with the PTO coupler 732 remaining in a retracted position and prevented from coupling with PTO coupler 740. FIG. 56 illustrates a condition in which levers 802 have been moved to a locked position. In this position, the wedge 858 is moved by the linkage 852 (see e.g., FIG. 50) so that the wedge no longer prevents the spring loading of PTO coupler 732 from extending the coupler forward into contact with the PTO coupler 740 to transmit power.

[0108] As noted, an advantageous feature of some disclosed embodiments is that that locking of the implement carrier and interface together also automatically couples the PTO couplers together to transmit power, and unlocking the implement carrier and interface automatically decouples the PTO couplers form each other. Also as noted, this can be done manually by moving the levers 802, or the process can be done using a power BT. FIGs. 57-59 illustrate one such power BT example embodiment. As shown, a cylinder or other actuator 880 has one end coupled to a cam 882 to rotate the cam under the control of an operator using an operator input. The cam is connected by linkages 884 and 886 to the levers 802. Actuation of the actuator 880 thereby rotates the cam 882, which translates this rotation to levers 802 and to linkage 852 coupled to the wedge discussed above.

[0109] Referring now to FIGs. 60-61, shown are an example of power machine 100 in the form of a utility vehicle, which can be an autonomous utility vehicle in some embodiments. The power machine uses an interface 902 having one or more features as described above, to couple an angle broom implement 900 to the power machine. The interface 902 is one implementation of the above concepts to mount an implement to a power machine using implement carrier and implement interface features. FIG. 61 illustrates the power machine side components 904 of the interface 902, including an implement carrier with a PTO connection, and power BT features for both controlling the locking of the interface and the automatic PTO coupler connection and disconnection as described.

[0110] FIG. 62 illustrates the implement side components 906 of the interface 902. Included in the interface is a pulley box 910, shown for example in FIGs. 63-66, which is configured to serve multiple unique purposes. The pulley or belt box allows the change of diameters of the pulleys or gears to achieve different RPM outputs for the PTO, allowing the interface to be used on different carriers having different requirements. Additionally, the pulley box creates a drop down of the output shaft to get the correct PTO shaft position for a particular implement, such as a particular angle broom.

[0111] Although the subject of this disclosure has been described with reference to several embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the scope of the disclosure. In addition, any feature disclosed with respect to one embodiment may be included in another embodiment, and vice-versa. All references mentioned in this disclosure are hereby incorporated by reference.

Claims

WHAT IS CLAIMED IS:

1. An attachment system for a power machine, the attachment system comprising: an implement carrier configured to be mounted to the power machine and having an implement carrier plate configured be placed into contact with a bracket of an interface on an implement to mount the implement on the power machine, the implement carrier including a power take-off (PTO) aperture in the implement carrier plate; a locking lever rotatably mounted on the implement carrier and configured to be rotated between locked and unlocked positions to move locking pins which lock the implement carrier and the interface together; a bearing coupled to a power machine side of the implement carrier and configured to couple to a PTO shaft from the power machine; a first PTO coupler on the power machine side of the implement carrier supported by the bearing and aligned with the PTO aperture; wherein the implement carrier is configured such that rotation of the locking lever to the locked position moves the first PTO coupler forward toward or through the PTO aperture to an engagement position in which the first PTO coupler can be engaged with a second PTO coupler on the interface of the implement, and such that rotation of the locking lever to the unlocked position moves the first PTO coupler rearward toward the power machine to a disengaged position in which the first PTO coupler cannot be engaged with the second PTO coupler.2 The attachment system of claim 1 , and further comprising a wedge configured to be moved by movement of the locking lever, the wedge having an angled surface configured to engage the bearing or the first PTO coupler to move the first PTO coupler to the disengaged position when the locking lever is moved to the unlocked position.

3. The attachment system of claim 2, wherein the wedge is configured such that the angled surface disengages from the bearing or the first PTO coupler, when the locking lever is moved to the locked position, to allow the first PTO coupler to move to the engaged position.

4. The attachment system of claims 2 or 3, and further comprising a linkage coupling the wedge to the locking lever.

5. The attachment system of any preceding claim, wherein the first PTO coupler includes a pilot feature at a center of the first PTO coupler, the pilot feature configured to be received in a pilot aperture centered on the second PTO coupler.

6. The attachment system of claim 5, wherein the first PTO coupler incudes a plurality of spaced members extending from a surface of the first PTO and configured to be received in a plurality of spaced apart apertures in a surface of the second PTO.

7. The attachment system of any preceding claim, and further comprising the interface on the implement and the second PTO coupler.

8. The attachment system of any preceding claim, and further comprising an actuator configured to move the locking lever between the locked and unlocked positions.

9. A method of connecting a power source of a power machine to a tool of an implement, the method comprising: providing an implement carrier on the power machine, the implement carrier comprising: an implement carrier plate having a power take-off (PTO) aperture; a locking lever configured to be rotated between locked and unlocked positions to move locking pins; a bearing coupled to a power machine side of the implement carrier and configured to couple to a PTO shaft from the power machine; a first PTO coupler on the power machine side of the implement carrier supported by the bearing and aligned with the PTO aperture; providing an interface assembly on the implement, the interface assembly comprising: a bracket configured to be positioned in contact with the implement carrier plate; and a second PTO coupler; moving the implement carrier and the interface assembly together; rotating the locking lever to the locked position to move the locking pins to lock the implement carrier and interface assembly together, and to move the first PTOcoupler forward toward or through the PTO aperture to an engagement position in which the first PTO coupler engages with the second PTO coupler.

10. A system comprising: an implement carrier configured for mounting to a machine having a power source, the implement carrier comprising: a first portion of a jaw clutch; and a first power take-off shaft connected to the first portion of the jaw clutch and configured for power transmission connection to the power source; and an attachment assembly configured for mounting to an implement, the attachment assembly comprising: a second portion of the jaw clutch configured for power transmission connection to the first portion of the jaw clutch; a pulley assembly comprising: a drive pulley operably connected to the second portion of the jaw clutch; and a driven pulley connected by a belt to the drive pulley; a second power take-off shaft extending from the driven pulley and configured to transmit power from the pulley assembly to a tool of the implement; and a biasing element disposed intermediate the second portion of the jaw clutch and the pulley assembly.

11. The system of claim 10, wherein the implement carrier comprises a connector rib configured for insertion into a pocket of the attachment assembly.

12. The system of claim 11 , wherein the pocket comprises a flange extending from a bracket and bordered by first and second rails.

13. The system of any of claims 10 through 12, wherein: one of the implement carrier and of the attachment assembly comprises a pin receiver; and the other of the implement carrier and of the attachment assembly comprises a pin configured for partial insertion into the pin receiver.

14. The system of any of claims 10 through 13, wherein the implement carrier is configured for mounting to the machine at first and second pivot connections.

15. The system of any of claims 10-14, wherein the biasing element is a compression spring.

16. The system of claims 10-15, wherein at least one of the first power take-off shaft and of the second power take-off shaft comprises an extendable cardan.

17. The system of claims 10-16, wherein the first portion of the jaw clutch and the first power take-off shaft are connected through a plate.

18. The system of claim 17, comprising a bearing attached to the plate, through which the first portion of the jaw clutch or the first power take-off shaft extends.

19. The system of claim 18, comprising a bushing disposed between the bearing and the plate.

20. The system of claims 10-19, wherein: the first portion of the jaw clutch comprises a first plurality of projections; and the second portion of the jaw clutch comprises a second plurality of projections; wherein the first plurality of projections are configured to mate with the second plurality of projections to operably couple the first and second portions of the jaw clutch for power transmission.

Images