Quick Tool Coupling System

Description

1 / 28 Quick Tool Coupling System Field of technique [1] This patent disclosure relates generally to tool coupling systems for coupling a work tool to a work machine and, more particularly, to a system and method for determining whether the work tool is correctly coupled to the work machine. Background [2] Various types of work machines in the fields of construction, mining and landscaping, such as wheel loaders and crawler tractors, include a bucket or blade located at the distal end of an implement joint connected to the main body of the machine. The implement joint may be articulated to move and spatially maneuver the work tool for performing various operations. In the example of a wheel loader, the work tool may be a bucket used to examine, transport and dump earth or granular materials at a work site. [3] To increase the functionality and versatility of the work machine, the work machine can be equipped with a quick tool coupler that allows the implement joint to be interchangeably fitted to a variety of different work tools. A conventional design for a quick tool coupler system includes a tool coupler fixed to the end of the implement joint and a corresponding coupling interface on the outside of the work tool. The tool coupler and the coupling interface are structurally designed to combine and uncouple from each other to attach and detach the work tool from the work machine. In addition, the quick tool coupler system can be operated by an operator maneuvering the implement joint from the cab of the Petition 870250083319, dated 09 / 16 / 2025, page 13 / 88 2 / 28 machine work without direct interaction and practical with the work tool. [4] An example of a quick tool coupling system is described in US Patent Publication No. 2016 / 0176691, assigned to the applicant of the present application. Publication '691 describes a tool coupler with a coupling frame made of a plurality of laterally spaced frame plates that are joined at the top by a tube or beam and at the bottom extension by a base assembly. The tool coupler may also include a pair of hydraulically actuated wedge mechanisms, wherein each includes a movable wedge that can be extended and retracted from the base assembly by hydraulic cylinders. To actuate the tool coupler, the coupling interface may include a pair of laterally spaced hooks that attach to the upper beam and a pair of lower wedge pockets that can receive the movable wedges when extended. [5] By using matching pairs of hooks, movable wedges and wedge pockets to result in multiple physical connection points, the tool coupler and coupling interface can stably and securely fit the work tool into the implement joint. The present disclosure relates to a system and method for verifying that the tool coupler and coupling interface are properly engaged. Summary [6] The disclosure describes, in one aspect, a tool coupling system for a work machine to fit into a work tool, including a coupling interface. The coupling interface has a first coupling hook and a second coupling hook and a first wedge pocket and a second wedge pocket, located below the first and second coupling hooks. The tool coupling system also includes a tool coupler associated with the work machine implement joint. The tool coupler includes a frame Petition 870250083319, dated 09 / 16 / 2025, page 14 / 88 3 / 28 tool coupler with a frame beam and a base assembly located below the frame beam. The tool coupler further includes a first wedge mechanism with a first moving element operationally associated with a first hydraulic actuator. To monitor the engagement of the work tool in the work machine, the tool coupling system is associated with an embedded coupling monitoring system such as an electronic controller, which includes a fluid pressure sensor associated with the hydraulic actuator. The electronic controller is configured to receive a pressure data set from the fluid pressure sensor and compare the pressure data set with the control model data set to determine if the work tool is engaged in the tool coupler. [7] In another aspect, a method of fitting a work tool with a coupling interface into the tool coupler on a work machine is disclosed. According to the method, a pressure data set is received from at least one hydraulic actuator that displaces a movable wedge in the tool coupler to engage a wedge pocket in the coupling interface. The method compares the pressure data set with a control model data set and determines whether the work tool is fitted into the work machine based on the step of comparing the pressure data set with the control model data set. [8] In a further aspect, the disclosure describes a coupling monitoring system configured as a computer-readable program to be executed by an electronic controller associated with a work machine. The coupling monitoring system includes a data collection operation that receives a first set of pressure data about a first hydraulic actuator that displaces a first movable wedge relative to a first wedge pocket in a work tool and a second set of pressure data about a second hydraulic actuator that displaces a second movable wedge relative to a second Petition 870250083319, dated 09 / 16 / 2025, page 15 / 88 4 / 28 wedge pocket on the work tool. The coupling monitoring system also includes a comparison operation configured to compare the first pressure data set and the second pressure data set with a control model data set to determine if the first and second moving wedges are correctly received in the first and second wedge pockets, respectively. The first pressure data set, the second pressure data set, and the control model data set include a plurality of pressure data over time. Brief description of the drawings [9] Figure 1 is an isometric view of a work machine that includes a quick tool coupling system for fitting a work tool onto a work machine, such as a wheel loader.

[10] Figure 2 is a rear isometric view of a coupling interface associated with the work tool that can be operationally engaged to the tool coupler by actuating the movement of the movable wedges.

[11] Figure 3 is a front isometric view of an embodiment of the tool coupler component that can be joined to a tool junction associated with the work machine.

[12] Figure 4 is a rear isometric view of the tool coupling component showing the arrangement of the hydraulic cylinders in relation to movably actuated movable wedges for engaging and disengaging the work tool.

[13] Figure 5 is an elevation view of the operating engagement of the movable wedge with a corresponding wedge pocket of the coupling interface.

[14] Figure 6 is a graph that describes comparisons of measured hydraulic pressure and linear extension of hydraulic cylinders with a control model for fitting the work tool into the quick tool coupling system. Petition 870250083319, dated 09 / 16 / 2025, page 16 / 88 5 / 28

[15] Figure 7 is a flow diagram of an exemplary method for classifying and evaluating the fit of the work tool with the quick tool coupling system using pressure data sets from the hydraulic cylinders. Detailed description

[16] Now with reference to the Figures, where, whenever possible, similar reference numbers refer to similar elements, a work machine 100 is illustrated associated with a quick tool coupling system 102 for selectively fitting a work tool 104 into the work machine. The work machine 100 and the work tool 104 are shown in relation to a ground surface 106 with which the machine interacts during a work-related activity such as construction, mining, agriculture, landscaping or similar activities.

[17] In the illustrated example, the work machine 100 may be in the embodiment of a wheel loader and may include a machine chassis or frame 108 which is supported on a plurality of propulsion devices 110 that contact the ground surface 106 or other work surface. For mobility, the propulsion devices 110 may receive motive power from an internal combustion engine or electric motor supported on the machine frame 108 to propel the work machine 100 over the ground surface 106. An example of suitable propulsion devices 110 may be pneumatic wheels which can rotate relative to the machine frame 108. Another example of suitable propulsion devices 110 may be continuous tracks, which may be arranged around a plurality of toothed wheels rotatably attached to the machine frame 108 to translate the tracks relative to the ground surface 106.

[18] To accommodate an operator, an onboard operator station 112 may be situated on the machine frame 108, in a location so as to provide visibility over the terrain surface 106. The operator station Petition 870250083319, dated 09 / 16 / 2025, page 17 / 88 6 / 28 112 may include controls for interacting with an operator to drive the work machine 100 and manipulate the work tool 104. For example, steering and acceleration controls and tool controls, such as levers and joysticks, may be located at the operator station 112. In some examples, the work machine 100 may be configured for remote operation, and the operator may control the operation via a remote control assisted by one or more onboard cameras or vision systems.

[19] The work tool 104 may be a bucket, which is a rigid structure that defines an open internal volume that can receive and accommodate material during an excavation and loading operation. To spatially move the work tool 104 relative to the machine frame 108 through a range of motion during an operation, the work tool may be fitted into a mechanical implement joint 114 assembled from a plurality of rigid links articulated through a series of rigid joints. The structural components of the implement joint 114 are movable relative to each other to drive the work tool 104 through various operations.

[20] In the example illustrated, the implement joint 114 may include a pair of parallel and spaced lifting arms 116, which are articulated to the machine frame 108 at the front end of the work machine 100 and extend forward from it to engage the work tool 104. The lifting arms 116 may be rigid and configured to raise and lower the work tool 104 relative to the ground surface 106. To tilt and dump the work tool 104, the implement joint 114 may also include a tilt arm 118 which is located between the pair of lifting arms 116 and is configured to rotate the work tool 104 relative to the lifting arms 116.

[21] To power the articulation of the lifting arms 116 and the tilting arm 118, the implement joint 114 can be associated Petition 870250083319, dated 09 / 16 / 2025, page 18 / 88 7 / 28 operationally to one or more hydraulic actuators 120. In one embodiment, the hydraulic actuators 120 may be hydraulic cylinders that can telescopically extend and retract a piston rod from a cylinder barrel upon receiving hydraulic fluid that pressurizes and forces the movement of the piston rod. To supply the hydraulic fluid, the working machine 100 may include a hydraulic system 122 that includes a hydraulic fluid pump 124 and a hydraulic reservoir 126 that accommodates the fluid. The hydraulic fluid pump 124 may receive motive power through the same power source as the propulsion devices 110 and may direct hydraulic fluid between the hydraulic reservoir 106 and the hydraulic actuators 120 by means of hydraulic conduits, which may be flexible tubes fitted and passed over the machine frame 108.

[22] To selectively configure the work machine 100 to different operations, the tool quick coupler 102 is designed to be interchangeably fitted to different work tool configurations 104. For example, if the work tool 104 is a bucket, the tool quick coupler 102 can allow releasable connections with buckets of different sizes or volumes. Other examples of work tools 104 may be pallet-attaching forklifts, shovels or plows, brushes, etc. To allow quick and efficient attachment and release of work tools 104, the quick coupler 102 is configured to operate with limited human interaction and can be controlled by an operator from the operator station 112 or remotely.

[23] For quick and secure coupling of the work machine 100 to different work tools 104, the tool quick coupling system 102 may be a connection grouping that includes a tool coupler 130 that is associated with the implement joint 114, configured to engage and release from a coupler interface 132 associated with the work tool 104. The tool quick coupling system 102 allows the work machine 100 to engage and collect a work tool 104 from the ground surface 106 for an operation Petition 870250083319, dated 09 / 16 / 2025, page 19 / 88 8 / 28 specific and detach and separate from the work tool 104 to proceed to a different task. To engage the tool coupler 130 and the coupling interface 132 to attach the work tool, an operator can maneuver the tool coupler 130 into proximity with the coupling interface 132 using the propulsion devices 110 and the movable implement joint 114.

[24] For reference purposes, the relative movement of the tool coupler 130 and the coupling interface 132 may occur with respect to a coordinate or reference system. For example, the design of the work tool 104, as a bucket, may be oriented along a tool centerline 134, which corresponds to the direction in which the tool coupler 130 and the coupling interface 130 are moved for engagement and / or release and separation. The tool centerline 134 may be associated with the forward and backward travel direction of the work machine 100. To stabilize the work tool 104 from rotating around the tool centerline 134, the tool coupler 130 and the coupling interface may engage at multiple points of contact along the lateral direction 136, which is orthogonal to the tool centerline 134.Furthermore, a vertical direction 138 can be defined as normal both in relation to the centerline of the tool 134 and to the lateral direction 136 and can be associated with the height of the work machine 100 and the work tool 104. It can be observed that, due to the plurality of moving components, the reference frame itself can assume different orientations in relation to the work machine 100 and the ground surface 106.

[25] With reference to Figure 2, the tool interface 132 can be physically associated with the work tool 104 and, in the example of a bucket or blade, can generally be located at the rear of the work tool and be exposed for accessibility during fitting. For the work tool 104 to be physically secured by the tool coupler 130, the tool interface 132 can include a pair of coupling hooks 140a, 140b, which project from the outside. Petition 870250083319, dated 09 / 16 / 2025, page 20 / 88 9 / 28 of the rear of the work tool 104 and are spaced in the lateral direction 136 at regular distances from the centerline of the tool 134. The coupling hooks 140a, 140b are shaped to curve or bend upon themselves to form a deep recess or hook eye 142a, 142b that are accessible from below. The hook eyes 142a, 142b of the coupling hooks 140a, 140b are aligned coaxially and located towards the upper half of the work tool 104 relative to the vertical direction 138. The flat metal plates that form the coupling hooks 140a, 140b are situated parallel to each other and can be integrally formed as part of the work tool 104 structure.

[26] To securely engage with the tool coupler 130, the coupler interface 132 may also include a pair of wedge pockets 144a, 144b which are also located and projecting from the rear outer part of the work tool 104. The wedge pockets 144a, 144b may be made as rectangular hollow tubes integrally joined to the rear part of the work tool 104 and may structurally define a pair of wedge cavities 146a, 146b which are oriented and accessible from the vertical direction 138. The wedge pockets 144a, 144b are also spaced in relation to the lateral direction 136 and may be laterally aligned with the corresponding first and second coupling hooks 140a, 140b.The wedge pockets 144a, 144b are located below the first and second coupling hooks 140a, 140b in the vertical direction 138, so that the wedge cavities 146a, 146b are vertically spaced and vertically opposite to the first and second coupling hooks 140a, 140b.

[27] With reference to Figures 3 and 4, for physical engagement with the coupling interface 132, the tool coupler 130 can be interpreted as a coupling frame 150 assembled from structural metal beams and plates rigidly connected to support and transfer loads. The structural frame 150 may include a plurality of parallel, vertically oriented metal frame plates that are laterally spaced in relation to the lateral direction 136. The frame plates may be arranged Petition 870250083319, dated 09 / 16 / 2025, page 21 / 88 10 / 28 in duplicate pairs based on the lateral spacing of the tool centerline 134. For example, a pair of central frame plates 152a, 152b may be located opposite the tool centerline 134 and situated in the middle center of the coupler frame 150. A greater lateral distance from the tool centerline 134 may be a pair of duplicate and opposite first and second intermediate frame plates 154a, 154b. Situated on the lateral extensions of the coupler frame 150 is a pair of laterally opposite outer frame plates 156a, 156b that delineate the lateral ends of the tool coupler 130.

[28] To join the tool coupler 130 with the distal end of the implement joint 114, selected frame plates may include circular pin eyelets arranged through the flat metal plates. For example, arranged on the central frame plates 152a, 152b there may be a first set of pin eyelets 158a, 158b aligned and situated towards the vertically upper ends of the central frame plates 152a, 152b. The pin eyelets 158a, 158b may receive a cylindrical pin for connection with the tilt arm 118 of the implement joint 114. The outer frame plates 154 may include a second set of laterally aligned pin eyelets 159a, 159b that are situated towards the vertically lower ends of the coupler frame 150. The second set of pin eyelets 159a, 159b is intended to receive cylindrical pins associated with the lifting arms 116 of the implement joint 114.The vertical spacing 138 between the first set of pin eyelets 158a, 158b and the second set of pin eyelets 159a, 159b allows the coupling frame 150 to tilt when rotating about the side direction 136.

[29] To engage the coupling hooks, the coupling frame 150 may include a cylindrical frame beam 160, which may be hollow and called a tube, which aligns and extends in the lateral direction 136 between the first and second intermediate frame plates 154a, 154b. The frame beam 160 may be situated towards the upper edge, and establish the same, of the coupling frame 150 and rigidly fixed to the frame plates. Petition 870250083319, dated 09 / 16 / 2025, p. 22 / 88 1 1 / 28 central 154a, 154b. The coupling hooks 140a, 140b can be placed on the frame beam 160, which can be inserted and received into the hook eyelets 142a, 142b, thus connecting the tool coupler 130 to the coupling interface 132. The cylindrical shape of the frame beam 160 allows relative rotation with respect to the coupling hooks 140a, 140b to facilitate fitting. To further facilitate connection to the coupling hooks 140a, 140b, a pair of alignment lugs 162a, 162b can project vertically from the frame beam 160 and can be shaped or narrowed to make sliding contact with the coupling hooks 140a, 140b.

[30] The vertically lower ends of the center frame plates 152a, 152b and the intermediate frame plates 154a, 154b can be interconnected by a lateral transverse base grouping 164 which establishes the lower edge of the coupling frame 150. The frame beam 160 and the base grouping 164 maintain the lateral spacing between the adjacent center frame plates 152a, 152b and the intermediate frame plates 154a, 154b which extend vertically between the frames. The base grouping 164 may be an orthogonal box-like structure, welded to the respective frame plates to stiffen the coupling frame 160. To rigidly connect the outer frame plates 156a, 156b, the first and second frame webs 166a, 166b may extend laterally outward from the upper and lower ends of the first and second intermediate frame plates 154a, 154b.

[31] To engage the wedge pockets 144a, 144b of the coupling interface 132, the tool coupler 130 may include a pair of hydraulically actuated wedge mechanisms 170a, 170b, which are operationally fitted into the coupling frame 150. The wedge mechanisms 170a, 170b may be located between the center frame plates 152a, 152b and the intermediate frame plates 154a, 154b on the respective lateral sides of the tool centerline 134. The wedge mechanisms 170a, 170b may include a pair of relocatable or movable wedges 172a, 172b which may Petition 870250083319, dated 09 / 16 / 2025, p. 23 / 88 12 / 28 extend and retract in relation to base grouping 164. The movable wedges 172a, 172b can be accommodated and slide within a corresponding pair of wedge guide passages 174a, 174b which are disposed through base grouping 164 and oriented to guide the movable wedges 172a, 172b generally in relation to the vertical direction 138 during extension and retraction.

[32] Movable wedges 172a, 172b may generally be orthogonal in shape and made of a square metal bar. Movable wedges 172a, 172b may also extend between a wedge point 176a, 176b and a wedge tail 178a, 178b. Movable wedges 172a, 172b may generally be longer than the base grouping 164, so that wedge tails 178a, 178b project from wedge guide passages 174a, 174b. To establish the wedge shape, movable wedges 172a, 172b may taper between the wedge tail 178a, 178b and the wedge point 176a, 176b. For example, the rear structural faces of movable wedges 172a, 172b may each include an inclined surface 179a, 179b that narrows the wedge tips 176a, 176b.

[33] To extend and retract the movable wedges 174a, 174b, the wedge mechanisms 172a, 172b may include a pair of hydraulic actuators 180a, 180b which are hydraulically powered by hydraulic fluid from, for example, the hydraulic system 122 associated with the work machine 100. The hydraulic actuators 180a, 180b may each be incorporated as hydraulic cylinders which include a rod end from which a rod connected to the piston 182a, 182b extends from the cylindrical body and is operatively connected to the respective wedge tails 178a, 178b, projecting from above the base assembly 164. The hydraulic actuators 180a, 180b may also each include a blind end 184a, 184b which is operatively connected to the respective plates of intermediate frames 154a, 154b to fix the spatial relationship of the hydraulic cylinders in relation to the coupling frame 150. Petition 870250083319, dated 09 / 16 / 2025, page 24 / 88 13 / 28

[34] In another configuration, the movable wedges 174a, 174b can be connected together with a single hydraulic actuator that simultaneously moves multiple wedges relative to the wedge pockets 144a, 144b when receiving hydraulic fluid from the hydraulic system.

[35] The hydraulic actuators 180a, 180b can be configured as double-acting cylinders, so that they can receive and / or discharge pressurized hydraulic fluid, resulting in the extension and retraction of the rods 182a, 182b. In one embodiment, each of the hydraulic actuators 180a, 180b can be operationally associated with a corresponding hydraulic valve 186a, 186b that selectively directs or discharges the hydraulic fluid from the cylindrical body. The hydraulic actuators 180a, 180b can be fluidly coupled to the hydraulic system 122 by means of one or more hydraulic fluid lines 188, which can be flexible and reinforced rubber hoses, which are guided along the structure of the coupling frame 150 and fixed at various locations thereon.In one example, hydraulic fluid lines 188 can connect to hydraulic actuators 180a, 180b in series, so that the first hydraulic actuator 180a is upstream and directs fluid to the second hydraulic actuator 180b downstream. However, in other examples, the first and second hydraulic actuators 180a, 180b can be connected in parallel. The hydraulic fluid lines 188 can be arranged to feed and return lines that direct fluid to the first and second hydraulic actuators 180a, 180b, and return fluid from them.

[36] With reference to Figure 5, to engage the tool coupler 130 and the coupling interface 132, the tool coupler 150 is maneuvered so that the frame beam 160 is received and lies within the hook eyelets 142a, 142b of the coupling hooks 140a, 140b. This can be done by inserting the frame beam 160 under the coupling hooks 140a, 140b and then lifting the coupling frame 150 vertically upwards so that the frame beam 160 lies within the hook eyelets 142a, 142b. The coupling frame 150 is then tilted forward along the centerline of the tool 134 to move Petition 870250083319, dated 09 / 16 / 2025, page 25 / 88 14 / 28 the base grouping 164 closely over the first and second wedge pockets 144a, 144b, and the movable wedges 172a, 172b are aligned with the wedge cavities 146a, 146b with respect to the vertical direction 138.

[37] The hydraulic actuators 180a, 180b are activated to cause the movable wedges 172a, 172b to descend from the wedge guide passages 174a, 174b and be received into the wedge cavities 146a, 146b. The inclined surfaces 179a, 179b of the wedge tips 176a, 176b can move in sliding contact with the inner surfaces of the wedge pocket 144a, 144b, so that the tool coupler 130 and the tool interface 132 are maintained in a fixed and stabilized relationship with each other. For example, the inclined surfaces 179a, 179b of the movable wedges 172a, 172b can apply sliding forces against the wedge pockets 144a, 144b, tilting the coupling interface 132 backward, along the centerline of the tool 134, and downward relative to the vertical direction 138, thus clamping the coupling interface 132 in the tool coupler 130.

[38] To monitor the engagement of the tool coupler 130 and the coupling interface 132, the quick tool coupler 102 may be associated with a coupling monitoring system that may be incorporated into and function as part of an electronic controller 190. The electronic controller 190 may be a programmable computing device and may include one or more microprocessors 192 to execute software instructions and process computer-readable data. Examples of suitable microprocessors include programmable logic devices such as field-programmable gate arrays (“FPGAs”), dedicated or custom logic devices such as application-specific integrated circuits (“ASICs”), gate arrays, a complex programmable logic device, or any other suitable type of circuit assembly or microchip.

[39] To store application software and data, the electronic controller 190 may include a computer-readable and / or computer-writable non-transient data memory 194, for example, read-only memory (“ROM”), random access memory (“RAM”), EPROM memory, flash memory or other means. Petition 870250083319, dated 09 / 16 / 2025, page 26 / 88 15 / 28 of more permanent storage, such as magnetic or optical storage. Data memory 194 is capable of storing software in the form of computer executable programs, including instructions, definitions, and electronic data for the operation of the mobile machine. Programs may include equations, algorithms, graphs, maps, lookup tables, databases, and the like.

[40] To interface and network with other operating systems, the electronic controller 190 may include an input / output interface 196 for electronically sending and receiving non-transient data and information. The input / output interface 196 may be physically incorporated as data ports, serial ports, parallel ports, USB ports, connectors and the like for communication via wired cables, fiber optics or other communication bus systems and may utilize any suitable form of communication protocol for data communication, including sending and receiving digital or analog signals synchronously, asynchronously or otherwise.

[41] For example, to receive information about the operation of the first and second hydraulic actuators 180a, 180b, the coupling monitoring system may include one or more fluid pressure sensors 198a, 198b in electronic communication with the electronic controller 190 via the input / output interface 196. The fluid pressure sensors 198a, 198b may be piezoelectric sensors, pressure transducers or similar that respond to the hydraulic pressure in the first and second hydraulic actuators 180a, 180b. The fluid pressure sensors 198a, 198b may also measure the flow rate to the hydraulic actuators 180a, 180b, which may be indicative of or converted into the fluid pressure contained in them.

[42] The measured fluid pressure or flow conditions can be converted into electronic data signals communicated to the electronic controller 190 for processing. The first and second fluid pressure sensors 198a, 198b can be physically associated with the first and second hydraulic actuators 180a, 180b to directly measure the pressure. Petition 870250083319, dated 09 / 16 / 2025, page 27 / 88 16 / 28 of fluid in the same, or they may be located in the hydraulic fluid lines 188 that direct hydraulic fluid to and from the hydraulic actuators 180a, 180b. The first and second fluid pressure sensors 198a, 198b may make separate measurements of fluid pressure in the respective first and second hydraulic actuators 180a, 180b.

[43] In the configuration where a single hydraulic actuator is connected and moves both movable wedges 172a, 172b, the coupling monitoring system may include a single fluid pressure sensor. Furthermore, if the first and second hydraulic actuators 180a, 180b are fluidically connected, a single fluid pressure sensor may be used to measure the pressure in both hydraulic actuators 180a, 180b.

[44] With reference to Figure 6, with continued reference to the previous Figures, a pair of graphs is shown illustrating the correspondence between the action of the hydraulic actuators 180a, 180b and the engagement of the movable wedges 172a, 172b with the wedge pockets 144a, 144b. For example, a pressure graph 200 may include curves representing the fluid pressure 202 or the force associated with the hydraulic actuators 180a, 180b on the Y-axis during the engagement of the tool coupler 130 and the coupling interface 132, represented temporally on the X-axis 204 in relation to time. The measured fluid pressure 202 can correspond to, or indicate in a directly related manner, the force exerted by the first and second hydraulic actuators 180a, 180b to move the movable wedges 172a, 172b and, therefore, the force applied by the movable wedges to another object.

[45] The fluid flow associated with hydraulic actuators 180a, 180b causes the extension of the respective rods 182a, 182b which are fitted into the movable wedges 172a, 172b and thus results in the movable wedges being received in the wedge pockets 144a, 144b. A displacement graph 206 includes curves that represent, along the Y-axis, the stroke displacement 208 of the rods 182a, 182b, for example, in millimeters, and, similarly, with respect to time 204, on the X-axis, of the cylindrical bodies of the hydraulic actuators 180a, 180b. The displacement of the rods 182a, 182b in the graph of Petition 870250083319, dated 09 / 16 / 2025, page 28 / 88 17 / 28 displacement 206 corresponds to the engagement of the movable wedges 172a, 172b within their respective wedge pockets 144a, 144b.

[46] For reference purposes, the correspondence between the fluid pressure 202 of the hydraulic actuators 180a, 180b, represented by the pressure graph, and the displacement 208 of the rods 182a, 182b, represented by the displacement graph 206, can be indicated by a control model curve 210 (solid line). The control model curve 210 can depict or represent the fluid pressure 202 in the hydraulic actuators 180a, 180b and the displacement of the rods 182a, 182b during the successful or desired sliding engagement of the movable wedges 172a, 172b and the wedge pockets 144a, 144b. Although the control model curve 210 is shown as a continuous curve over time, the control model curve can also be represented as a range of temporally distinct measurements of fluid pressure 202 and displacement 206 at specific moments 204 during the successful or desired engagement of the movable wedges 172a, 172b.

[47] The pressure graph 200 and the displacement graph 206 may also include curves representing the actual pressure 202 and displacement 208, as obtained from direct measurements made during the engagement of the tool coupler 130 and the coupling interface 132. For example, the pressure and displacement graphs 200, 206 may include a first measurement curve 212 (short dashes) representing pressure and displacement measurements 202, 208 obtained from the first hydraulic actuator 180a associated with the first wedge mechanism 170a. A second measurement curve 214 (long dashes) may also be shown representing pressure and displacement measurements 202, 208 obtained from the second hydraulic actuator 180b associated with the second wedge mechanism 170b. The first and second measurement curves 212, 214 can be obtained from datasets that represent a plurality of data points obtained over time 204.Data sets can refer to a collection of data or information that can be obtained through measurements. Petition 870250083319, dated 09 / 16 / 2025, page 29 / 88 18 / 28 made in relation to the first hydraulic actuator 180a and the second hydraulic actuator 180b.

[48] ​​With regard to pressure graph 200, the first and second measurement curves 212, 214 represent the fluid pressure measurement made from the first and second hydraulic actuators 180a, 180b. If the number of hydraulic actuators 180a, 180b is different, or the arrangement of the fluid pressure sensors 1988a, 198b is different, the measurement curves 212, 214 will be correspondingly different. With regard to displacement curve 206, the first and second measurement curves represent the spatial displacement of the movable wedges 172a, 172b that is caused in response to fluid pressure and / or fluid flow in the hydraulic actuators 180a, 180b. For example, fluid pressure can be converted into displacement of the movable wedges 172a, 172b or into resistance to displacement of the movable wedges.

[49] The engagement of the movable wedges 172a, 172b and the wedge pockets 144a, 144b and therefore the engagement of the tool coupler 130 and the coupler interface 132 can be divided into a plurality of temporal steps or sequences. For example, during an initial segment of wedge stroke 220, the rods 182a, 182b can extend by moving the movable wedges 172a, 172b into the corresponding wedge pockets 144a, 144b, as indicated by the displacement diagram 206. The movable wedges 172a, 172b can be freely received into the wedge pockets 144a, 144b and initially encounter little physical resistance if the movable wedges 172a, 172b are correctly aligned with the wedge pockets 144a, 144b. The control model curve 210 of the pressure graphs 200 indicates the unobstructed movement of the moving wedges 172a, 172b by showing a small or insignificant pressure increase during the wedge stroke segment 220.

[50] The pressure graph 200 and the displacement graph 206 can also be associated with an alignment segment 222 and 224 in which the movable wedges 172a, 172b initially come into contact with the respective wedge pockets 144a, 144b. The initial contact can be forcibly altered or spatially displace the movable wedges 172a, 172b and the wedge pockets. Petition 870250083319, dated 09 / 16 / 2025, page 30 / 88 19 / 28 144a, 144b in alignment if the structures are not previously aligned. For example, the first measuring curve 212 may be associated with the first movable wedges 172a in series, and the second measuring curve 214 may be associated with the second movable wedge 172b downstream. The displacement 208 of the first movable wedge 172a may precede the displacement of the second movable wedge 172b if the corresponding hydraulic actuators are connected in series. The first movable wedge 172a may therefore contact the corresponding wedge pocket 144a before the second movable wedge contacts the second wedge pocket 144b. The unimpeded displacement of the first movable wedges 172a, as represented by the first measuring curve 212, may cease before the unimpeded displacement of the second movable wedge 172b, as indicated by the second measuring curve.

[51] For example, the first measurement curve 212 can be associated with the correct alignment of the first movable wedge 172a and the first wedge pocket 144a, and the pressure graph 200 and the displacement graph 206 show that the first measurement curve 212 experienced some pressure increase when the wedge 172a engaged the wedge pocket 144a and completed most of its stroke. The second measurement curve can be associated with the misalignment of the second movable wedge 172b and the second wedge pocket 144b, so that the pressure graph 200 indicates an increase in fluid pressure as force is applied to continue the forced extension of the second movable wedge 172b, as indicated in the displacement graph 206.

[52] Pressure graph 200 and displacement graph 206 can also be associated with a gripping or loading segment 224 in which the movable wedges 172a, 172b have established and are in complete contact with the respective wedge pockets 144a, 144b. Once contact has been established between the movable wedges 172a, 172b and the wedge pockets 144a, 144b, further displacement is generally prohibited 208, as indicated by the first and second measurement curves 212, 214 substantially Petition 870250083319, dated 09 / 16 / 2025, page 31 / 88 20 / 28 leveled on the displacement curve 206. The additional addition of hydraulic fluid to the hydraulic actuators 180a, 180b causes an increase in fluid pressure, as indicated in the pressure graph 200, which corresponds to an application of gripping force between the movable wedges 172a, 172b and the respective wedge pockets 144a, 144b.

[53] The fitting sequence may also be associated with an accommodation action or a fixing activity in which the movable wedges 172a, 172b and the wedge pockets 144a, 144b have settled into fixed contact with each other. For example, the pressure graph 200 and the displacement graph 206 indicate the accommodation segment 226, in which both the fluid pressure 202 and the displacement 208 of the first measuring curve 212 and the second measuring curve 214 are generally flat. The accommodation segment 226 may indicate that the first and second movable wedges 172a, 172b are correctly fitted in relation to the wedge pockets 144a, 144b and that the tool coupler 130 is fitted into the coupling interface 132. Industrial applicability

[54] With reference to Figure 7, with continued reference to the preceding Figures, an embodiment of a process or method for monitoring the engagement of the tool coupler 130 and the coupler interface 132 and, therefore, the combination of the work machine 100 and the work tool 104 using the quick tool coupling system 102 is illustrated. The method or process illustrated in Figure 7 can be incorporated as a computer-readable program written as software in a suitable computer programming language and can be executed by the electronic controller 190 associated with the quick tool coupling system 102. The method can be initiated by a coupling initiation step 300, which can be in response to a command directed by the operator. Alternatively, the coupling initiation step 300 can be performed by configuring the electronic controller 190 to Petition 870250083319, dated 09 / 16 / 2025, page 32 / 88 21 / 28 recognize specific movements of the implement joint 114 associated with the fitting of the work tool 104 into the work machine 100.

[55] In a data collection step 302, the electronic controller 190 can obtain data associated with the actuation of the first and second hydraulic actuators 180a, 180b. For example, the data collection step 302 can obtain a first set of pressure data 304 from the first fluid pressure sensor 198a associated with the first hydraulic actuator 180a and can obtain a second set of pressure data 306 from the fluid pressure sensor 198b associated with the second hydraulic actuator 180b. As explained above, the first and second sets of pressure data 304, 306 can include a plurality of data points or individual fluid pressure measurements made over time. Thus, the first and second sets of pressure data 304, 306 allow the electronic controller 190 to plot fluid pressure curves 202 shown in the fluid pressure graph 200.Furthermore, the fluid pressure 202 can correspond to the displacement 208 of rods 182a, 182b in the displacement graph 206, as explained above. As explained above, a single set of pressure data can be obtained from a single fluid pressure sensor in configurations where a single hydraulic actuator jointly moves the first and second movable wedges 172a, 172b, or an upstream fluid pressure sensor measures the pressure in multiple downstream hydraulic actuators fluidly connected in series.

[56] The first and second data sets 304, 306 may include a plurality of individual data points taken during the course of the fitting operation. The plurality of data points may be measured during and indicative of the complete fitting sequence, including the wedge stroke segment 220, the alignment segment 222, the loading segment 224, and the adjustment segment 226. Data sets 304, 306 are obtained continuously and immediately usable as the fitting sequence occurs.

[57] For comparison purposes, the data collection step 302 may also obtain a control model data set 308. The set of Petition 870250083319, dated 09 / 16 / 2025, page 33 / 88 22 / 28 control model data 308 can be empirically predetermined by performing fitting tests of the work tool 104 on the work machine 100 and by measuring the fluid pressure 202 of the hydraulic actuators 180a, 180b. The control model data set 308 can indicate when the movable wedges 172a, 172b are correctly aligned with the wedge pockets 144a, 144b and thus reflect a proper or correct coupling of the tool coupler 130 with the coupling interface 132. The control model data set 308 can be stored as electronic data in the data memory 194 associated with the electronic controller 190.

[58] The method may also include a data processing step 310 in which the electronic controller 190 analyzes and prepares the first and second sets of pressure data 304, 306 for comparison with the control model data set 308. For example, the data processing step 310 may include a curve plotting step 312 in which the first and second sets of pressure data 304, 306 are plotted to generate computer-readable versions of the pressure graph 200 and the displacement graph 206. As indicated above, the first set of pressure data 304 may be plotted as the first measurement curve 212 associated with the actuation of the first hydraulic actuator 180a and the second set of pressure data 214 may be plotted as the second measurement curve 214 associated with the actuation of the second hydraulic actuator 180b.The curve plotting step 312 can also use the control model dataset 308 to plot the control model curve 210.

[59] In another example, the control model dataset 308 and the plotted control model curve 210 may represent acceptable pressure values ​​202 and corresponding displacement values ​​206 at distinct times 204 that are associated with successful or desired engagement of the work tool. For example, the data processing step 310 may prepare the control model dataset 308 as Petition 870250083319, dated 09 / 16 / 2025, page 34 / 88 23 / 28 pressure readings 202 expected at different times 204 during the tool coupling process.

[60] The data processing step 310 may also include a data partitioning step 314 in which the first and second pressure data sets 304, 306 are analyzed and particularized into the plurality of fitting segments, such as those shown in the pressure and displacement graphs 200, 206. For example, the data partitioning step 314 may separate or distinguish the pressure curve 202 and the displacement curve 206 into the wedge stroke segment 220, the alignment segment 222, the loading segment 224, and the adjustment segment 226. The data partitioning step 314 may use previous empirical data from fitting test runs to separate the first and second pressure data sets 304, 306 into the plurality of fitting segments.

[61] In one possible example, the data processing step 310 may include a fuzzy approximation step 316 that applies logical approximation rules for comparison of the first and second data sets 304, 306 and the control model data set 308. The fuzzy approximation step 316 allows partial approximations or coincidences of the data sets instead of a strictly binary comparison. For example, the fuzzy approximation step 316 allows approximation between the control model curve 210 and the first and second measurement curves 212, 214 in the pressure and displacement graphs 200, 206. The rules and logical approximation variables for the fuzzy approximation step 316 may be predetermined and stored in a library in the data memory 194 associated with the electronic controller 190.

[62] The method can then proceed to a comparison and determination step 330 in which the first and / or second sets of pressure data 304, 306 are compared with the control model data set 308 and / or with each other to determine whether the work tool 104 is correctly fitted to the work machine 100. The comparison step Petition 870250083319, dated 09 / 16 / 2025, page 35 / 88 24 / 28 and data determination 330 can, for example, make direct comparisons of the first and second measurement curves 212, 214 with the control model curve 210. If the fluid pressure 202 of the pressure chart 200 for each of the first and second measurement curves 212, 214 and the control model curve 210 coincide, this may indicate that the movable wedges 172a, 172b were properly extended and received in their respective wedge pockets 144a 144b.

[63] The comparison and determination step 330 can also compare the different fitting segments more particularly. For example, a discrepancy in fluid pressure 202 between the first measuring curve 212 and the second measuring curve 214 during the alignment step segment 222 may indicate that a set of the respective first and second movable wedges 172a, 172b is misaligned with respect to the respective first and second wedge pockets 144a, 144b. The tool coupler 130 must therefore be aligned and squared in relation to the coupler interface 132. As another example, if there is a discrepancy in fluid pressure 202 between the first measuring curve 212 and the second measuring curve 214 during the loading segment 224 and / or the adjustment segment 226, this may indicate that one of the first and second movable wedges 172a, 172b is misaligned in relation to the first and second wedge pockets 144a, 144b.

[64] If the comparison and determination step 330 determines that the first and second sets of pressure data 304, 306 coincide with the control model data set 308, the method may proceed to a tool coupling affirmation step 332, affirming the proper engagement of the tool quick coupler 102 and fitting of the work tool 104 into the work machine 100. The electronic controller 190 may be programmed to issue a signal or alert to the operator corresponding to the tool coupling affirmation step 332.

[65] If the comparison and determination step 330 determines that the first and / or second sets of pressure data 304, 306 do not match the Petition 870250083319, dated 09 / 16 / 2025, page 36 / 88 25 / 28 control model dataset 308, even if fuzzy approximation rules are applied, the method may proceed to an incorrect tool fitting step 334. The incorrect tool fitting step 334 may recognize that at least one of the first or second movable wedges 172a, 172b is not properly aligned or has been received in the corresponding wedge pocket 144a, 144b. The electronic controller 190 therefore determines that the tool coupler 130 and the coupler interface 132 are not properly engaged and the work tool 104 is not properly fitted to the work machine 100.

[66] In one example, in cooperation with the incorrect tool attachment step 334, the method may include a warning or deactivation step 336. In the warning or deactivation step 336, the electronic controller 190 may issue a warning to the operator and / or deactivate the operation of the work machine 100. The warning or deactivation step 336 therefore prevents movement of the implement joint 114 while the work tool 104 is incorrectly attached to the tool quick coupler system 102, which results in possible damage to the work tool 104 and the quick coupler 102 or injury to the personnel at the work site.

[67] The disclosed coupling monitoring system compares pressure data sets obtained from the first and second hydraulic actuators 180a, 180b to determine whether either of the first or second moving wedges 172a, 172b is correctly received in the corresponding first or second wedge pockets 144a, 144b. For example, if the first measuring curve 212 or the second measuring curve 214 is not aligned or coincident with the control model curve 210, the coupling monitoring system can determine that the work tool 104 is not correctly fitted to the tool coupler 130. This results from the use of a first pressure sensor 198a and a second pressure sensor 198b to separately measure the actuation of the first and second hydraulic actuators 172a, 172b. Petition 870250083319, dated 09 / 16 / 2025, page 37 / 88 26 / 28

[68] The coupling monitoring system can also compare the first set of pressure data 304 and the second set of pressure 306 with each other to determine if the work tool is correctly fitted 104. For example, the first measurement curve 212 should coincide with the second measurement curve 214, at least with respect to the fluid pressure 202 and / or time 204 of the selected fitting segments, if the work tool 104 is correctly fitted. Plotting and comparing the first and second sets of pressure data 304, 306 provides another useful method for tool fitting verification.

[69] A possible advantage of measuring the first and second pressure data sets 304, 306 which include a plurality of pressure data over time is a better basis for comparison of the engagement of the first and second moving wedges 172a, 172b with the respective first and second wedge pockets 144a, 144b. For example, comparison of the first and second measurement curves 212, 214 and the control model curve 210 accommodates temporary misalignment of the moving wedges 172a, 172b with the wedge pockets 144a, 144b or temporary incorrect readings. Furthermore, the use of pressure data sets comprising a plurality of pressure data facilitates the application of logical approximation rules to employ fuzzy approximation.The coupling monitoring system can better accommodate and take into account temporary misalignments that may occur during the coupling of the tool coupler 130 and the coupling interface 132 in real workplace contexts.

[70] Another possibility for measuring the first and second sets of pressure data 304, 306 and immediately comparing the data sets with the control model set 308 is that the coupling monitoring system proceeds in real time as the fitting sequence occurs. The coupling monitoring system and method therefore provide a more complete view of the tool fitting activity. Petition 870250083319, dated 09 / 16 / 2025, page 38 / 88 27 / 28 work on a sequence of dotted segments, rather than identifying and comparing a single data point with a threshold value.

[71] It should be noted that the terms “front”, “back”, “top”, “bottom”, “vertical”, “side” and the like are for reference and orientation purposes only and are not intended to be a limitation to disclosure. Those skilled in the art will recognize that the orientation of the adapter support is a matter of perspective and therefore the orientation terms are for reference only.

[72] It will be understood that the preceding description provides examples of the system and technique disclosed. However, it is contemplated that other implementations of the disclosure may differ, in details, from the preceding examples. All references to the disclosure, or examples thereof, are intended to refer to the particular example discussed at that point and are not intended to imply any limitation as to the scope of the disclosure more generally. All language of distinction and depreciation with respect to certain features is intended to indicate a lack of preference for those features, but not to exclude such part from the scope of the disclosure entirely, unless otherwise indicated.

[73] The citation of value ranges in this document is intended merely as a shorthand method for referring individually to each separate value covered in the range, unless otherwise indicated in this document, and each separate value is incorporated into the descriptive report as if it were individually cited in this document. All methods described in this document may be performed in any suitable order, unless otherwise indicated in this document or clearly contradicted by the context.

[74] The use of the terms a, an, the, “a” and at least one and similar referents in the context of the invention description (especially in the context of the following claims) should be interpreted as covering both the singular and the plural, unless otherwise indicated herein or clearly contradicted by the context. The use of the term “at least one” followed Petition 870250083319, dated 09 / 16 / 2025, p. 39 / 88 28 / 28, when referring to a list of one or more items (for example, “at least one of A and B”), should be interpreted as meaning an item selected from the listed items (A or B) or any combination of two or more of the listed items (A and B), unless otherwise indicated herein or clearly contradicted by the context.

[75] Consequently, this disclosure includes all modifications and equivalents of the matter mentioned in the appended claims hereto, as permitted by applicable law. Furthermore, any combination of the elements described above in all possible variations thereof is covered by the disclosure, unless otherwise indicated in this document or clearly contradicted otherwise by the context. Petition 870250083319, dated 09 / 16 / 2025, p. 40 / 88

Claims

1 / 3 CLAIMS 1. Tool coupling system (130) for a work machine (100) characterized in that it comprises: a work tool (104) comprising a coupling interface (132) having a first coupling hook and a second coupling hook and having a first wedge pocket (144a) and a second wedge pocket (144b) located below the first coupling hook (140a) and the second coupling hook (140a); a tool coupler (130) comprising a coupling frame (140) having a frame beam (160) and a base assembly (164) located below the frame beam (160), the tool coupler (130) further comprising a first wedge mechanism (170a) having a first movable wedge (172a) and being operationally associated with a first hydraulic actuator (172a);and a coupling monitoring system comprising an electronic controller (190), a fluid pressure sensor (198a) associated with the first hydraulic actuator (172a), wherein the electronic controller (190) is configured to receive a pressure data set (304) from the fluid pressure sensor (198a) and compare the pressure data set (304) with a control model data set (308) to determine whether the work tool (104) is fitted to the tool coupler (130).

2. Tool coupling system (130), according to claim 1, characterized in that the fluid pressure sensor (198a) is a first fluid pressure sensor (198a) associated with the first hydraulic actuator (180a) and that it provides a first set of pressure data (304), and the coupling monitoring system includes a second fluid pressure sensor (198a) associated with a second hydraulic actuator (180b) associated with a second wedge mechanism (144b), which has a second movable wedge (172a), wherein the second fluid pressure sensor (198a) provides a second set of pressure data. Petition 870250083319, dated 09 / 16 / 2025, p. 41 / 88 2 / 3 (306) to compare with the control model dataset (306) to determine if the work tool (104) is fitted into the tool quick coupler (102).

3. Tool coupling system (130), according to claim 2, characterized in that the first pressure data set (304) and the second pressure data set (306) each include a plurality of fluid pressure data (202) taken with respect to time.

4. Tool coupling system (130), according to claim 3, characterized in that the first pressure data set (304), the second pressure data set (306) and the control data set (308) are divided into a plurality of coupling segments.

5. Tool coupling system (130), according to claim 4, characterized in that the plurality of fitting segments includes a wedge stroke segment (220) associated with the movement of the first and second movable wedges (172a), an alignment segment (222) associated with the sliding contact between the first and second movable wedges (172a) and the first and second wedge pockets (144a), respectively, and a loading segment (224) associated with the application of gripping forces between the first and second movable wedges (172a) and the first and second wedge pockets (144a), respectively.

6. Tool coupling system (130), according to claim 5, characterized in that the coupling monitoring system is further configured to plot a first measurement curve (212) based on the first set of pressure data (304), a second measurement curve (214) based on the second set of pressure data (306) and a control model curve (210) based on the control data set (308).

7. Tool coupling system (130), according to claim 2, characterized in that the coupling monitoring system is configured to compare the first measurement curve (212), the second measurement curve (214) and the control model curve (210) to determine whether the work tool (104) is fitted into the tool coupler (102).

8. Quick coupling system (102), according to claim 7, characterized in that the coupling monitoring system is configured to apply logical approximation rules so that the first measurement curve (212) and the second measurement curve (214) approximately coincide with the control model curve (210).

9. Tool coupling system (130), according to claim 2, characterized in that the first and second pressure sensors are arranged in hydraulic fluid lines (188) fluidly connected to the first and second hydraulic actuators (172a), respectively.

10. Method for fitting a work tool (104) with coupling interface (132) to the tool coupler (130) on a work machine (100) characterized in that it comprises: receiving a pressure data set (304) from a hydraulic actuator (180a) that displaces a movable wedge (172a) in the tool coupler (130) to engage a wedge pocket (144a) in the coupling interface (132); comparing the first pressure data set (304) and the second pressure data set (306) with a control model data set (308); and determining whether the work tool (104) is fitted to the work machine (100) based on the step of comparing the pressure data set (304) with the control model data set (308). Petition 870250083319, dated 09 / 16 / 2025, page 43 / 88

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