Excavator electrification module and excavator having same

Abstract

The present invention relates to an excavator electrification module for the electrification of an engine-based excavator. The excavator electrification module may comprise: a housing mounted on a counterweight mount part of an engine-based excavator; an electric motor installed in the housing; an electrification controller received in the housing and electrically connected to a main controller of the engine-based excavator so as to control the operation of the electric motor on the basis of a control signal of the main controller; a battery module installed in the housing so as to supply power to the electric motor; and a coupling part for detachably coupling the housing to the counterweight mount part.

Description

Excavator electrification module and excavator equipped with same

[0001] The present invention relates to an excavator electrification module for converting an engine-based excavator into an electric excavator and an excavator equipped with the same.

[0002] An excavator is a construction machine that performs tasks such as digging the ground at civil engineering, architecture, and construction sites, loading work to transport soil, crushing work to dismantle buildings, and leveling work to prepare the ground.

[0003] Excavators of this type are usually configured to obtain driving power from an engine to operate a hydraulic pump for the operation of the operating mechanism, and a diesel engine that uses light oil is usually used as the engine.

[0004] Recently, to address environmental pollution caused by the use of fossil fuels such as diesel, development of electric excavators powered by electricity has been underway. Electric excavators use motors instead of conventional engines to power the excavator. This allows for the elimination of intake and exhaust systems, and by reducing the size of the fan, it reduces noise transmitted through the air.

[0005] However, as electric excavators continue to replace traditional engine-based excavators, the issue of whether traditional engine-based excavators should be retired or decommissioned may arise.

[0006] The present invention has been conceived in consideration of the above points, and its technical task is to provide an excavator electrification module that can be installed on an existing engine-based excavator to electrify the excavator in a simple manner, and an excavator equipped with the same.

[0007] In addition, the present invention has as a technical problem the ability to easily adjust the weight balance of an excavator through an excavator electric power module.

[0008] The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0009] An excavator electrification module according to one embodiment of the present invention is an excavator electrification module for electrifying an engine-based excavator, comprising: a housing mounted on a counterweight mount of the engine-based excavator; an electric motor installed within the housing; an electrification controller accommodated within the housing and electrically connected to a main controller of the engine-based excavator to control the operation of the electric motor based on a control signal of the main controller; a battery module installed within the housing and supplying power to the electric motor; and a coupling portion detachably coupling the housing to the counterweight mount portion; wherein the housing may include a first mount portion on which the electric motor is installed; and a second mount portion provided on one side of the first mount portion and on which the battery module is installed.

[0010] A battery protection case that accommodates the battery module may be installed in the housing.

[0011] The above battery protection case may include a base plate fixed to the bottom of the housing; and a plurality of protection frames installed on the base plate and forming a space for receiving the battery module.

[0012] A plurality of guide rods are installed on the above base plate, and a guide hole into which the guide rods are inserted can be formed in the battery bracket to which the battery module is fixed.

[0013] A guide bushing with lubricant applied thereto can be installed in the above guide hole.

[0014] An excavator electric power module according to another embodiment of the present invention may further include a buffer means installed between the battery module and the battery protection case and elastically supporting the battery module.

[0015] The above battery module may be provided with a towing hook to which a removal tool is attached.

[0016] An excavator electric power module according to another embodiment of the present invention may further include a connector for electrically connecting the electric power controller to the main controller.

[0017] An excavator power module according to another embodiment of the present invention may further include an auxiliary counterweight installed on the outer surface of the housing and providing a certain amount of load to the body of the excavator.

[0018] An excavator powertrain module according to another embodiment of the present invention may further include a suction-side hydraulic connection for hydraulically connecting a suction line of the motor hydraulic pump with a hydraulic tank of the engine-based excavator; and a discharge-side hydraulic connection for hydraulically connecting a discharge line of the motor hydraulic pump with a main control valve of the engine-based excavator.

[0019] According to another aspect of the present invention, an excavator electrification module for electrifying an engine-based excavator may include: a housing mountable to a counterweight mount of the engine-based excavator; an electric motor installed within the housing; an electrification controller electrically connected to a main controller of the engine-based excavator and controlling the operation of the electric motor based on a control signal of the main controller; and one or more auxiliary counterweights installed within the housing and providing a load for weight balance to the engine-based excavator.

[0020] The above auxiliary counterweight is installed in a mount portion provided inside the housing, and the mount portion of the housing has a space in which a plurality of the auxiliary counterweights can be installed, and the number of the plurality of auxiliary counterweights installed in the mount portion can be adjusted according to the target weight of the excavator electric power module.

[0021] The above mount portion may be recessed from the support surface of the housing that supports the electric motor and may have the form of a receiving groove capable of receiving a plurality of the auxiliary counterweights by stacking them.

[0022] The auxiliary counterweight may be formed with a catch member having a catch hole for a traction tool, and the catch member may be formed within a groove recessed from the surface of the auxiliary counterweight.

[0023] The above mount portion may include a first mount groove formed at the center of the housing and in which at least one first counterweight is installed; and second and third mount grooves formed on each side of the first mount groove and in which at least one second and third counterweight is installed, respectively.

[0024] The housing may further include a base plate that is fixedly installed on the support surface and supports the electric motor.

[0025] The above auxiliary counterweight may have one or more insertion holes formed therein, and the mount portion may have an insertion rod formed therein to be inserted into the insertion holes.

[0026] A through hole through which the insertion rod passes is formed in the above base plate, and a fixing means for fixing the base plate can be fastened to an end of the insertion rod.

[0027] An excavator according to one aspect of the present invention comprises: an excavator body to which a work tool is connected; an internal combustion engine installed in the excavator body and controlled by an engine controller; an engine hydraulic pump that generates hydraulic pressure for operating the work tool using power generated by the internal combustion engine; and an excavator motorization module installed in the excavator body for operating the work tool in an electric manner without operating the internal combustion engine; wherein the excavator motorization module comprises: a housing mountable to a counterweight mount portion of the excavator body; an electric motor installed in the housing; an electric motor controller accommodated in the housing and electrically connected to a main controller of the excavator to control the operation of the electric motor based on a control signal of the main controller; a battery module installed in the housing and for supplying power to the electric motor; and a coupling portion that detachably couples the housing to the counterweight mount portion, wherein the housing comprises: a first mount portion on which the electric motor is installed; And it may include a second mount portion provided on one side of the first mount portion and on which the battery module is installed.

[0028] According to another aspect of the present invention, an excavator comprises: an excavator body to which a work tool is connected; an internal combustion engine installed in the excavator body and controlled by an engine controller; an engine hydraulic pump that generates hydraulic pressure for operating the work tool using power generated by the internal combustion engine; and an excavator motorization module installed in the excavator body for operating the work tool in an electric manner without operating the internal combustion engine; wherein the excavator motorization module may include: a housing mountable to a counterweight mount portion of the excavator body; an electric motor installed in the housing; an motorization controller electrically connected to a main controller of the excavator and controlling the operation of the electric motor based on a control signal of the main controller; and one or more auxiliary counterweights installed in the housing and providing a load for weight balance to the engine-based excavator.

[0029] According to an embodiment of the present invention, there is an effect that an engine-based excavator can be easily electrified simply by installing an excavator electrification module on a counterweight mount of an existing engine-based excavator and connecting hydraulic lines and electric lines.

[0030] In addition, according to an embodiment of the present invention, since the excavator electric power module itself also functions as a counterweight, there is an advantage in that the overall configuration of the excavator is simplified.

[0031] In addition, according to an embodiment of the present invention, there is an advantage in that an engine-based excavator can be electrified without the need for a separate external power supply by installing a battery module within the excavator electrification module.

[0032] In addition, according to an embodiment of the present invention, the engine driving mode and the motor driving mode can be conveniently switched by simply operating the mode switching switch, and there is an advantage in that the excavator can be used for both engine and electric purposes as needed.

[0033] FIG. 1 is an exploded perspective view of an excavator equipped with an excavator powertrain module according to one embodiment of the present invention.

[0034] FIG. 2 is a block diagram of an excavator having an excavator powertrain module according to one embodiment of the present invention.

[0035] FIG. 3 is a drawing showing a hydraulic circuit of an excavator having an excavator powertrain module according to one embodiment of the present invention.

[0036] Figure 4 is a perspective view of an excavator powertrain module according to one embodiment of the present invention.

[0037] Figure 5 is an exploded perspective view of the excavator power module illustrated in Figure 4.

[0038] Fig. 6 is a drawing showing the installation guide structure of the battery module illustrated in Fig. 5.

[0039] FIG. 7 is a diagram showing a hydraulic circuit of an excavator having an excavator powertrain module according to another embodiment of the present invention.

[0040] Figure 8 is a perspective view of an excavator powertrain module according to another embodiment of the present invention.

[0041] Figure 9 is an exploded perspective view of the excavator electric power module illustrated in Figure 8.

[0042] Fig. 10 is a drawing showing a state in which a counterweight is installed in the housing of the excavator electric power module illustrated in Fig. 8.

[0043] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention. In describing the present invention, detailed descriptions of related known technologies will be omitted if they are deemed to obscure the gist of the present invention.

[0044] Terms such as first, second, etc. may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another.

[0045] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0046] Hereinafter, an embodiment of an excavator power module according to the present invention and an excavator equipped with the same will be described in detail with reference to the attached drawings. In the description with reference to the attached drawings, identical or corresponding components are assigned the same drawing numbers, and redundant descriptions thereof will be omitted.

[0047] FIG. 1 is an exploded perspective view of an excavator equipped with an excavator powertrain module according to one embodiment of the present invention, and FIG. 2 is a block diagram of an excavator equipped with an excavator powertrain module according to one embodiment of the present invention. FIG. 3 is a diagram illustrating a hydraulic circuit of an excavator equipped with an excavator powertrain module according to one embodiment of the present invention.

[0048] Referring to FIGS. 1 to 3, an excavator (100) according to the present embodiment includes an excavator body (110), an internal combustion engine (140), an engine hydraulic pump (190), and an excavator electric power module (200).

[0049] A work tool for performing work such as digging the ground is connected to the excavator body (110), and the work tool may include a boom (121) connected to the excavator body (110), an arm (123) connected to the boom (121), a bucket (125) connected to the arm (123), etc. A boom cylinder (122) for driving the boom (121) may be installed between the boom (121) and the excavator body (110), and an arm cylinder (124) for driving the arm (123) may be installed between the arm (123) and the boom (121). In addition, a bucket cylinder (126) for driving the bucket (125) may be installed between the bucket (125) and the arm (123).

[0050] A driving part (128), for example, a caterpillar driving part, for driving can be connected to the lower part of the excavator body (110), and the driving part (128) and the excavator body (110) are connected to each other so as to be able to rotate relative to each other, so that the excavator body (110) can perform a turning motion with respect to the driving part (128).

[0051] An internal combustion engine (140) is installed in the excavator body (110) and may include, for example, a diesel engine driven by gasoline. The operation of the internal combustion engine (140) is controlled by an engine controller (145), and the operation of the engine controller (145) may be controlled by a main controller (170). The main controller (170) is configured to control the overall operation of the excavator, including the operation of the operating mechanism, in addition to the engine controller (145).

[0052] An engine hydraulic pump (190) is installed in the excavator body (110) and connected to an internal combustion engine (140). The engine hydraulic pump (190) generates hydraulic pressure for the operation of a work tool using power generated by the internal combustion engine (140). The hydraulic pressure generated by the engine hydraulic pump (190) is transmitted to the main control valve (160), and the hydraulic pressure is transmitted to a boom cylinder (122), an arm cylinder (124), a bucket cylinder (126), etc. by the operation of the main control valve (160), so that the work tool can be operated.

[0053] The configuration of the excavator body (110), internal combustion engine (140), engine hydraulic pump (190), etc. described above has the same configuration as that of a conventional engine-based excavator. According to the present embodiment, an excavator electrification module (200) is additionally installed on a conventional engine-based excavator to electrify the conventional engine-based excavator.

[0054] The excavator electric power module (200) is installed in the excavator body (110) and enables the work tool to be operated in an electric manner without operating the internal combustion engine (140). Looking specifically at the configuration of the excavator electric power module (200), the excavator electric power module (200) includes a housing (210), an electric motor (220), a motor hydraulic pump (230), an electric power controller (240), and a battery module (250).

[0055] The housing (210) constitutes the exterior of the excavator power module (200) and has a receiving space therein for receiving an electric motor (220), a motor hydraulic pump (230), a power controller (240), and other components. The housing (210) is configured to be mountable to a counterweight mount (130) provided on the excavator body (110).

[0056] To this end, a coupling part for detachably coupling to a counterweight mount part (130) may be installed in the housing (210), and the coupling part may be implemented by various locking mechanisms capable of performing locking / unlocking between machine parts.

[0057] The counterweight (135) of the excavator (100) provides a certain load to the excavator body (110) to maintain the balance of the excavator (100). After removing the counterweight (135) from the counterweight mount (130) of the excavator body (110), the housing (210) is coupled to the counterweight mount (130). In this way, the excavator electric power module (200) of the present embodiment can perform the function of the counterweight (135) using its own weight, and if additional weight is required, it is also possible to install an auxiliary counterweight (215, see FIG. 4) on the housing (210). For this purpose, the housing (210) may be provided with a counterweight mounting portion for mounting the auxiliary counterweight (215).

[0058] The electric motor (220) is installed inside the housing (210) and is configured to generate power by power supply.

[0059] The motor hydraulic pump (230) is installed in the housing (210) and generates hydraulic pressure for the operation of the work tool using the power generated from the electric motor (220). As illustrated in FIG. 3, the motor hydraulic pump (230) may be connected to a suction line (235) for suctioning hydraulic pressure and a discharge line (233, 234) for discharge of hydraulic pressure. The discharge lines (233, 234) may include a first discharge line (233) and a second discharge line (234) which are respectively connected to a first discharge portion (231) and a second discharge portion (232) of the motor hydraulic pump (230). The suction line (235) and the discharge lines (233, 234) may be provided with a suction-side hydraulic connection portion (253) and a discharge-side hydraulic connection portion (251, 252).

[0060] The hydraulic system equipped in the existing excavator is such that the hydraulic tank (180) and the engine hydraulic pump (190) are connected through the excavator-side suction line (181), and the engine hydraulic pump (190) and the main control valve (160) are connected through the excavator-side discharge line (150: 153, 154). The operating fluid of the hydraulic tank (180) is delivered to the main control valve (160) by the operation of the engine hydraulic pump (190). In the case of the engine hydraulic pump (190), a first discharge portion (151) and a second discharge portion (152) may also be included, and the main control valve (160) may also include a first control valve (161) and a second control valve (162) connected to these, respectively. The first control valve (161) is connected to the first discharge portion (151) of the engine hydraulic pump (190) through the first excavator-side discharge line (153), and the second control valve (162) is connected to the second discharge portion (152) of the engine hydraulic pump (190) through the second excavator-side discharge line (154).

[0061] The suction side hydraulic connection (253) is configured to hydraulically connect the suction line (235) of the motor hydraulic pump (230) with the hydraulic tank (180) of the engine-based excavator, and specifically, can be configured to connect to the excavator-side suction line (181) between the hydraulic tank (180) and the engine hydraulic pump (190).

[0062] The discharge-side hydraulic connection (251, 252) is configured to hydraulically connect the discharge line (233, 234) of the motor hydraulic pump (230) with the main control valve (160) of the engine-based excavator, and specifically, can be configured to connect to the excavator-side discharge line (153, 154) between the engine hydraulic pump (190) and the main control valve (160). The discharge-side hydraulic connection (251, 252) may include a first discharge-side hydraulic connection (251) connected to the first excavator-side discharge line (153), and a second discharge-side hydraulic connection (252) connected to the second excavator-side discharge line (154).

[0063] The electric motor controller (240) is electrically connected to the main controller (170) of the excavator and is configured to control the operation of the electric motor (220) based on a control signal of the main controller (170).

[0064] The excavator powertrain module (200) may be provided with a first connector (281) for electrically connecting the powertrain controller (240) to the main controller (170). In addition, a mode change switch (260) for switching between an engine driving mode and a motor driving mode may be connected to the first connector (281). It is possible to install the mode change switch (260) in the control panel of an existing excavator, and it is also possible to change the function of a switch in an existing control panel to a mode change switch (260) through a software change.

[0065] The main controller (170) can be set to selectively deactivate the engine controller (145) or the motor controller (240) when a switching signal to engine drive mode or motor drive mode is input through the mode change switch (260), which is possible through a software update of the control system of an existing excavator.

[0066] For example, when a signal to switch from engine driving mode to motor driving mode is input, the main controller (170) deactivates the engine controller (145) and activates the electric drive controller (240), and the electric drive controller (240) controls the operation of the electric motor (220) and electrical components by the control signal of the main controller (170). At this time, it is possible to configure the power supply to the engine driving and control components to be cut off.

[0067] Additionally, an air conditioning compressor (243) and an auxiliary motor (245) for supplying power to the air conditioning compressor (243) may be additionally installed inside the housing (210).

[0068] The battery module (250) is installed within the housing (210) and is configured to supply power to the electric motor (220). The battery module (250) can be configured to be rechargeable by an external power source. A generator (247) that generates power using the power of the motor shaft can be connected to the auxiliary motor (245), and the generator (247) can be configured to supply power to the battery module (250).

[0069] The process of installing the excavator power module (200) according to the present embodiment into an existing excavator will be described. First, the counterweight (135) is removed from the excavator body (110), and then the housing (210) of the excavator power module (200) is coupled to the counterweight mount (130) of the excavator body (110) and installed. Then, the suction-side hydraulic connection (253) of the motor hydraulic pump (230) is connected to the excavator-side suction line (181), and the discharge-side hydraulic connection (251, 252) is connected to the excavator-side discharge line (153, 154). In addition, the first connector (281) is connected to the electrical wiring of the excavator to establish an electrical connection between the excavator power module (200) and the existing excavator control system.

[0070] FIG. 4 is a perspective view of an excavator powertrain module according to one embodiment of the present invention, and FIG. 5 is an exploded perspective view of the excavator powertrain module illustrated in FIG. 4.

[0071] As illustrated in FIGS. 4 and 5, a housing (210) may be provided with a first mount portion (211) and a second mount portion (212), respectively. An electric motor (220) and a motor hydraulic pump (230) may be installed in the first mount portion (211), and a battery module (250) may be installed in the second mount portion (212) provided on one side of the first mount portion (211).

[0072] The housing (210) may have the form of a box with an open top to enable installation of components through the first and second mount portions (211, 212), and a cover (214) covering the space for receiving the components may be installed in the opening. The auxiliary counterweight (215) described above may be installed on the top of the cover (214), and this may be fixed by a fixing means (217).

[0073] A battery protection case (254) that accommodates a battery module (250) may be installed in the internal space of the housing (210), specifically, in the second mount portion (212). The battery protection case (254) has the function of protecting the battery module (250) from external shocks or vibrations.

[0074] The battery protection case (254) may include a base plate (255) fixed to the bottom of the housing (210) and a plurality of protection frames (256) installed on the base plate (255).

[0075] The base plate (255) can be fixed to the bottom surface of the housing (210) by a base fixing means (268), and the protection frame (256) is configured such that a plurality of frames are combined to form a space for receiving the battery module (250). The protection frame (256) can have a form in which a plurality of horizontal frames and vertical frames are combined, and the battery module (250) can be fixed to the battery bracket (262) and installed inward from the protection frame (256) by a certain space. A towing hook (264) can be formed on the battery module (250), specifically, the battery bracket (262), to which a tool for attaching and detaching the battery module (250) is attached.

[0076] A structure for guiding the installation of the battery module (250) may be provided between the battery module (250) and the battery protection case (254), and FIG. 6 shows an enlarged view of the installation guide structure of the battery module (250).

[0077] As an installation guide structure of a battery module (250), a plurality of guide rods (257) may be installed in the base plate (255), and a guide hole (258) into which the guide rods (257) are inserted may be formed in the battery bracket (262). It is also possible to additionally install a guide bushing (267) to which lubricant is applied in the guide hole (258) of the battery bracket (262).

[0078] Between the battery module (250) and the battery protection case (254), a buffering means (265, 266) for elastically supporting the battery module (250) may be additionally installed. A lower spring (265) and an upper spring (266) may be used as the buffering means (265, 266), and in this case, a guide rod (257) may be configured to be inserted into them. The lower spring (265) installed on the lower portion of the guide rod (257) performs a buffering function between the lower portion of the battery module (250) and the base plate (255). In addition, an upper spring (266) is installed on the upper portion of the guide rod (257) that passes through the guide hole (258) of the battery bracket (262), and a fixing plate (269) is installed on the upper portion thereof to be coupled to the battery protection case (254). By this configuration, the upper spring (266) performs a buffering action between the battery protection case (254) and the upper side of the battery module (250).

[0079] FIG. 7 is a diagram showing a hydraulic circuit of an excavator having an excavator powertrain module according to another embodiment of the present invention.

[0080] According to the present embodiment, a pilot pump (270) for generating pilot pressure may be additionally installed in the motor hydraulic pump (230). A gear pump may be used as the pilot pump (270), and the gear pump may be installed in the PTO (Power Take Off) stage of the motor hydraulic pump (230) or in the gear output shaft (i.e., P3 stage). In addition, a separate sub-motor may be installed in the housing (210) and the pilot pump (270) may be connected thereto.

[0081] In addition, a pilot pump (195) for generating pilot pressure may be installed in the engine hydraulic pump (190), and a gear pump may also be used for this. The pilot pump (195) installed in the engine hydraulic pump (190) is connected to the pilot block (185) via a pilot line (199). The pilot block (185) stabilizes the hydraulic pressure generated by the pilot pump (195) and provides it to a remote control valve connected to an operating lever.

[0082] According to the present embodiment, when installing the excavator electric power module (200), a pilot connection (256) provided in the discharge line of the pilot pump (270) of the motor hydraulic pump (230) is additionally connected to the pilot line (199). This makes it possible to provide pilot pressure to the remote control valve by the operation of the electric motor (220) even when the internal combustion engine (140) is not operating.

[0083] Meanwhile, the motor hydraulic pump (230) is additionally provided with a pressure sensor (273, 274) for measuring discharge hydraulic pressure and a pressure control valve (271, 272) for controlling the swash plate angle. For reference, a proportional pressure reducing valve may be used as the pressure control valve (271, 272).

[0084] Pressure sensors (273, 274) and pressure control valves (271, 272) may be installed in the first and second discharge portions (231, 232) of the motor hydraulic pump (230), respectively. As illustrated in FIG. 2, the pressure sensors (273, 274) and the pressure control valves (271, 272) may be electrically connected to the electric controller (240) through electrical wiring. The electric controller (240) may be configured to control the opening of the pressure control valves (271, 272) based on the sensing values ​​of the pressure sensors (273, 274).

[0085] Pressure sensors (193, 194) and pressure control valves (191, 192) may also be installed in the first and second discharge portions (151, 152) of the engine hydraulic pump (190), which may be electrically connected to the engine controller (145).

[0086] Referring to FIG. 2, the excavator power module (200) may additionally be provided with a second connector (282) for connecting the electrical wiring of the pressure sensor (273, 274) and the pressure control valve (271, 272) of the motor hydraulic pump (230) to the electrical wiring on the engine hydraulic pump (190) side.

[0087] Meanwhile, it is also possible to additionally install a backflow prevention valve (e.g., a check valve, a shuttle valve, a stop valve, a solenoid valve, a speed valve, a poppet valve, etc.) in the discharge line and pilot line (199) of the motor hydraulic pump (230) and the engine hydraulic pump (190).

[0088]

[0089] Figures 8 to 10 illustrate an excavator powertrain module according to another embodiment of the present invention. The excavator powertrain module of this embodiment has one or more auxiliary counterweights (300) installed inside a housing (210) to provide a load for weight balance to an engine-based excavator.

[0090] The electric motor (220) installed inside the housing (210) is connected to a power supply means, and may be connected to an external power source via a cable, for example. Alternatively, as in the above-described embodiment, the electric motor (220) may be electrically connected to a battery module (250) (see FIG. 2) installed inside the housing (210) to receive power, or power may be supplied to the electric motor (220) via a battery separately installed outside the housing (210).

[0091] As illustrated in FIGS. 8 to 10, the housing (210) has an internal space for accommodating an electric motor (220), a motor hydraulic pump (230), an electric control unit (240), etc. The housing (210) may have a box shape with an open top to accommodate these components, and although not illustrated in the drawing, an upper cover covering the accommodation space may be installed on the upper portion of the housing (210). In addition, a side opening (217) may be formed in the housing (210) for ease of maintenance, and a side cover covering the opening may be installed therein.

[0092] Inside the housing (210), a mount portion (211, 212, 213) is provided, and in the mount portion (211, 212, 213), one or more auxiliary counterweights (300) are installed to provide a load for weight balance to the engine-based excavator, i.e., the excavator body (110).

[0093] The mount section (211, 212, 213) has a space in which a plurality of auxiliary counterweights (300) can be installed, and the number of auxiliary counterweights (300) installed in the mount section (211, 212, 213) can be adjusted according to the target weight of the excavator electric power module.

[0094] The mount portion (211, 212, 213) may have the form of a receiving groove that is recessed from the support surface (215) of the housing (210) that supports the electric motor (220), and may have a form that can accommodate a plurality of auxiliary counterweights (300) by stacking them.

[0095] The mount portion (211, 212, 213) may include a first mount groove (211) formed in the central portion of the housing (210), and second and third mount grooves (212, 213) formed on both sides of the first mount groove (211), respectively. The first to third mount grooves (211, 212, 213) may have the same shape, but in the present embodiment, they are exemplified as having different areas and shapes.

[0096] For example, the first mount home (211) may have a smaller area than the second and third mount homes (212, 213), and a plurality of first counterweights (310) having a shape corresponding thereto may be installed in a stacked manner in the first mount home (211). Second and third counterweights (320, 330) having a shape corresponding thereto may also be installed in a stacked manner in the second and third mount homes (212, 213), respectively. These auxiliary counterweights (300: 310, 320, 330) may have a plate shape having a shape corresponding to the shape of the mount portions (211, 212, 213), and may have a shape that can be stacked in a plurality of layers.

[0097] According to the present embodiment, a configuration is exemplified in which three of each of the first counterweight (310), the second counterweight (320), and the third counterweight (330) are stacked in each of the first mount home (211), the second mount home (212), and the third mount home (213). However, it is also possible to configure a different number of auxiliary counterweights (300) accommodated in the mount portions (211, 212, 213), and it is also possible to configure a different number of auxiliary counterweights (300) accommodated in each of the first to third mount homes (211, 212, 213).

[0098] The auxiliary counterweight (300) may be formed with a catch member (340) having a catch hole (342) for catching a towing tool. The catch member (340) may be formed within a groove (344) recessed from the surface of the auxiliary counterweight (300), and through this structure, the auxiliary counterweights (300) may be stacked so that they are in surface contact with each other.

[0099] A base plate (350) supporting an electric motor (220) may be fixedly installed on a support surface (215) of a housing (210). In addition, a control box (241) accommodating an electric controller (240), an oil cooler (360) for cooling return oil before it flows into a motor hydraulic pump (220), etc. may be installed on the base plate (350). In a state where the electric motor (220), the motor hydraulic pump (230), the control box (241), the oil cooler (360), etc. are assembled to the base plate (350), the assembly may be fixedly installed on the support surface (215) of the housing.

[0100] The auxiliary counterweight (300) may be formed with one or more insertion holes (352), and the mount portions (211, 212, 213) may be formed with insertion rods (354) that are inserted into the insertion holes (352). The insertion rods (354) may have a shape that protrudes upward from the bottom surface of each mount groove (211, 212, 213), and may be formed with one or more of them for each mount groove (211, 212, 213).

[0101] Additionally, a through hole through which an insertion rod (354) passes may be formed in the base plate (350), and a fixing means (356) for fixing the base plate (350) may be fastened to the end of the insertion rod.

[0102] Hereinafter, the assembly process of the excavator power module (200) according to the present embodiment will be described. First, the target weight of the excavator power module (200) is set according to the specifications of the excavator, the specifications of the work tool, etc. Then, the installation position and number of auxiliary counterweights (300) are set according to the target weight of the excavator power module (200).

[0103] As exemplified in this embodiment, a total of nine auxiliary counterweights (300) can be installed, including three first counterweights (310), three second counterweights (320), and three third counterweights (330). It is possible to install all of these, but it is also possible to selectively install them depending on the target weight of the excavator electric power module (200).

[0104] For example, it is possible to install two first counterweights (310) and one each of the second and third counterweights (320, 330), or it is also possible to install two each of the second and third counterweights (320, 330) without installing the first counterweight (310).

[0105] In this way, a wide range of weights can be achieved through various combinations of the installation positions and numbers of auxiliary counterweights (300).

[0106] Auxiliary counterweights (300) are installed in each mount section (211, 212, 213) at the set positions and in the set number, and during this process, an insertion rod (354) is inserted into the insertion hole (352) of the auxiliary counterweight (300).

[0107] Once the installation of the auxiliary counterweight (300) is completed, the base plate (350) on which the electric motor (220) and the motor hydraulic pump (230) are assembled is installed on the support surface (215), and at this time, the insertion rod (354) is inserted into the through hole of the base plate (350). Finally, the fixing means (356) is fastened to the insertion rod (354) so ​​that the base plate (350) is firmly fixed.

[0108] Although the present invention has been described above with reference to specific embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

[0109] The present invention is usefully applied to an excavator electrification module that can be mounted on an engine-based excavator that performs excavation work such as digging the ground, loading work for transporting soil, crushing work for dismantling buildings, and leveling work for clearing the ground at civil engineering, architecture, and construction sites, and to an excavator equipped with the same, which can convert the engine-based excavator into an electric excavator.

Claims

1. As an excavator electrification module for electrifying an engine-based excavator, A housing mounted on a counterweight mount of the above engine-based excavator; An electric motor installed within the housing; An electric motor controller housed within the housing and electrically connected to a main controller of the engine-based excavator to control the operation of the electric motor based on a control signal from the main controller; A battery module installed within the housing and for supplying power to the electric motor; and A coupling part for detachably coupling the housing to the counterweight mount part is included; The above housing, A first mount portion on which the electric motor is installed; and An excavator electric power module, characterized in that it includes a second mount portion provided on one side of the first mount portion and on which the battery module is installed.

2. In paragraph 1, A motor hydraulic pump installed in the housing and generating hydraulic pressure for the operation of the working mechanism of the engine-based excavator using the power of the electric motor; An excavator electrification module characterized by further including:

3. In paragraph 1, An excavator electric power module, characterized in that a battery protection case in which the battery module is accommodated is installed in the housing.

4. In paragraph 3, The above battery protection case, a base plate fixed to the bottom of the housing; and An excavator electric power module, characterized in that it comprises a plurality of protective frames installed on the base plate and forming a receiving space for the battery module.

5. In paragraph 4, A plurality of guide rods are installed on the above base plate, An excavator electric power module, characterized in that a guide hole into which the guide rod is inserted is formed in the battery bracket to which the battery module is fixed.

6. In paragraph 4, An excavator electric power module, characterized in that it further includes a buffer means installed between the battery module and the battery protection case and elastically supporting the battery module.

7. In paragraph 1, An excavator electric power module, characterized in that the battery module is provided with a towing hook to which a removal tool is attached.

8. In paragraph 1, An excavator electric power module, characterized in that it further comprises a connector for electrically connecting the electric power controller to the main controller.

9. In paragraph 1, An excavator power generation module, characterized in that it further includes an auxiliary counterweight installed in the housing and providing a certain amount of load to the body of the excavator.

10. In paragraph 1, A suction side hydraulic connection for hydraulically connecting the suction line of the above motor hydraulic pump with the hydraulic tank of the above engine-based excavator; and, An excavator power module, characterized in that it further includes a discharge side hydraulic connection for hydraulically connecting the discharge line of the motor hydraulic pump with the main control valve of the engine-based excavator.

11. Excavator body to which the working tools are connected; An internal combustion engine installed in the above excavator body and controlled by an engine controller; An engine hydraulic pump that generates hydraulic pressure for the operation of the work mechanism by using the power generated by the internal combustion engine; and It includes an excavator electric power module installed on the excavator body and for operating the work tool in an electric manner without operating the internal combustion engine; The above excavator electric power module is, A housing mountable to the counterweight mount of the above excavator body; An electric motor installed within the housing; An electric controller housed within the housing and electrically connected to the main controller of the excavator to control the operation of the electric motor based on a control signal from the main controller; A battery module installed within the housing and for supplying power to the electric motor; and A coupling part for detachably coupling the housing to the counterweight mount part is included; The above housing, A first mount portion on which the electric motor is installed; and An excavator characterized by comprising a second mount portion provided on one side of the first mount portion and on which the battery module is installed.

12. As an excavator electrification module for electrifying an engine-based excavator, A housing mountable to the counterweight mount of the above engine-based excavator; An electric motor installed within the housing; An electric controller electrically connected to the main controller of the engine-based excavator and controlling the operation of the electric motor based on a control signal of the main controller; and An excavator powertrain module, characterized in that it comprises one or more auxiliary counterweights installed in the housing and providing a load for weight balance to the engine-based excavator.

13. In paragraph 12, The mount portion of the above housing has a space in which a plurality of auxiliary counterweights can be installed, An excavator powertrain module, characterized in that the number of the auxiliary counterweights installed on the mount can be adjusted according to the target weight of the excavator powertrain module.

14. In paragraph 13, The above mount part, An excavator electric power module characterized in that it has a shape of a receiving groove that is recessed from the support surface of the housing that supports the electric motor and can receive a plurality of the auxiliary counterweights by stacking them.

15. In paragraph 13, An excavator power module, characterized in that a catch member having a catch hole for catching a towing tool is formed in the auxiliary counterweight, and the catch member is formed in a groove recessed from the surface of the auxiliary counterweight.

16. In the 14th paragraph, the mount part, A first mount groove formed in the center of the housing and in which at least one first counterweight is installed; and An excavator power module, characterized in that it includes second and third mount grooves formed on both sides of the first mount groove, and in which one or more second and third counterweights are installed, respectively.

17. In paragraph 14, An excavator electric power module, characterized in that it further includes a base plate that is fixedly installed on the support surface of the housing and supports the electric motor.

18. In paragraph 17, The above auxiliary counterweight is formed with one or more insertion holes, An insertion rod that is inserted into the insertion hole is formed in the above mount portion, A through hole through which the insertion rod penetrates is formed in the above base plate, An excavator power module, characterized in that a fixing means for fixing the base plate is fastened to the end of the insertion rod.

19. In paragraph 12, An excavator electric power module, characterized in that it further includes a motor hydraulic pump installed in the housing and generating hydraulic pressure for the operation of a working mechanism of the engine-based excavator using the power of the electric motor.

20. Excavator body to which the working tool is connected; An internal combustion engine installed in the above excavator body and controlled by an engine controller; An engine hydraulic pump that generates hydraulic pressure for the operation of the work mechanism by using the power generated by the internal combustion engine; and It includes an excavator electric power module installed on the excavator body and for operating the work tool in an electric manner without operating the internal combustion engine; The above excavator electric power module is, A housing mountable to the counterweight mount of the above excavator body; An electric motor installed within the housing; An electric controller electrically connected to the main controller of the excavator and controlling the operation of the electric motor based on a control signal of the main controller; and An excavator characterized by comprising: one or more auxiliary counterweights installed in the housing and providing a load for weight balance to the engine-based excavator.

Images