Coupling device of work tools for excavator

Abstract

The present invention enables the connection and disconnection of implements in a one-touch type and ensures hydraulic connection automatically, thereby increasing efficiency and guaranteeing safety without the operator having to leave the driver's seat; A main body link frame connected to the end of the excavator boom and a hinge pin; A rotation means installed inside the main body link frame to enable a working device connected to the lower part of the main body link frame to be rotated in forward and reverse directions; A work device connection means installed below the main body link frame to enable connection with a work device; Includes a main body connecting means for connecting to a work device by installing it on the upper part of the above-mentioned work device; It is characterized by enabling the above main body link frame and the work unit to be connected in a one-touch type.

Description

Technology Field

[0001] The present invention relates to a work implement connecting device for an excavator, and more specifically, to providing an improved work implement connecting device for an excavator that can increase the efficiency of attaching and detaching a work implement by enabling the connection and operation of a work implement, which is connected to the boom of an excavator and operated by hydraulics, to be performed by one-touch operation. Background Technology

[0002] A forklift is a construction machine used in civil engineering, construction, and building sites to perform tasks such as excavation work to dig the ground, loading work to transport soil, crushing work to demolish buildings, and leveling work to prepare the ground. It refers to an excavator composed of a driving body that serves as the moving part of the equipment, an upper slewing body mounted on the driving body that rotates 360 degrees, and a working device.

[0003] The excavator described above performs necessary work by connecting a work implement to the end of a boom that is connected to the main body and operates to rotate and fold. Various types of work implements, such as buckets, rock drills, and grapples, are mounted on the boom and used.

[0004] Various types of connecting devices for attaching work implements to the aforementioned excavator have already been developed and used in the past. Examining the content of such prior art through patent literature reveals the following.

[0005] Patent Document 1 comprises: a hook body that is detachably mounted to the end of the boom of a mini excavator, wherein a fixed hook portion is formed on one side of the lower portion and a movable gripper portion is rotatably provided on the other side of the lower portion to correspond to the fixed hook portion; and

[0006] It is characterized by including a hydraulic motor installed via a motor shaft on the upper part of the above hook body, and a rotary gear provided on the motor shaft for rotating a movable gripper part.

[0007] Patent Document 2 includes a boom connecting part (100) to which a boom is connected, and a rotating link part for rotating a clamp attached downwardly to the lower end of the boom connecting part (100).

[0008] The boom connecting part (100) comprises a pair of vertical plates (104) having a boom connecting hole (102) formed therein and a horizontal plate (110) formed horizontally between the pair of vertical plates (104) and having a connecting hole (112) formed therein for connecting a control line to a driving part through the rotating link part.

[0009] The above-mentioned rotating link part is:

[0010] A cover case (210) that is coupled and fixed to the lower surface of the horizontal plate (110) of the boom connection part;

[0011] A fixing member (222) fixedly installed on the inner lower surface of the above cover case (210);

[0012] A rotating member (224) that is rotatably bearing-coupled outside the fixed member (222) within the cover case (210);

[0013] A driving gear part (250) engaged with the outer surface of the above-mentioned rotating member (224);

[0014] A lower cover (230) coupled to the lower surface of the above-mentioned rotating member (224); and

[0015] An inner connecting member (310) that is vertically connected to the lower cover (230) and installed to be in close contact with the inner surface of the fixing member (222);

[0016] It is characterized by including. Prior art literature

[0017] Patent Application No. 10 - 2021 - 0006273 Patent Registration No. 10 - 1941821 - 0000

[0018] doesn't exist. The problem to be solved

[0019] Among the prior art described above, Patent Document 1 describes a method of easily installing a hook body equipped with a fixed hook part, a movable gripper part, and a hydraulic motor on a mini excavator through a simplified structure to form a single gripper, and Patent Document 2 describes a method of improving torsional strength to improve durability by preventing wear of the bearing between the fixed part and the rotating part due to torsional twisting between the boom connecting part and the rotating link part.

[0020] Various types of implements are used for excavators, and these implements are classified into those that require hydraulics and those that do not. In the case of general implements that do not require hydraulics, work can be performed after connecting them using a hook, but in the case of implements that require hydraulics, hydraulics must be connected separately after connecting the implement.

[0021] Conventionally, when connecting a hydraulic implement while the operator was seated in the excavator's driver's seat, the method involved another operator connecting the hydraulics from the outside or the operator stepping out of the seat to connect them.

[0022] For this reason, when connecting the work implement, the work for hydraulic connection must be performed twice in addition to the work implement connection. Therefore, when working with a two-person team, it results in unnecessary waste of manpower relative to the level of work and causes an increase in work costs due to additional manpower.

[0023] When performing work alone, the worker must cross between the operator's seat and the boom of the excavator, which not only results in poor work efficiency but also makes efficient and continuous work difficult due to the unfortunate incident of work being interrupted by a failure in hydraulic supply during operation if the hydraulic connection is made incorrectly.

[0024] This occurs because the hydraulic lines are connected manually, which raises concerns about misassembly and may result in a lack of robust connection strength. Furthermore, even if the lines are connected, if the hydraulic hoses are not properly aligned, damage to the lines can result from twisting or other factors during operation.

[0025] As mentioned above, since the connection of hydraulic lines along with the connection of working equipment is not smooth, a lot of time and effort is required for work preparation, and various problems are occurring, such as it becoming difficult to continue efficient work due to malfunctions or damage during the work process. means of solving the problem

[0026] Accordingly, the present invention is designed to solve the above-mentioned problems and comprises a main body link frame (103) connected to the end of the boom (102) of an excavator (101) by a hinge pin;

[0027] A rotation means (105) installed inside the main body link frame (103) to enable the working device (104) connected to the lower part of the main body link frame (103) to be rotated in forward and reverse directions;

[0028] A work device connecting means (110) installed below the main body link frame (103) to enable connection with a work device (104);

[0029] Includes a main body connecting means (130) for connecting to a work device connecting means (110) by installing it on the upper part of the above-mentioned work device (104);

[0030] Since the main body link frame and the implement can be connected and disconnected with a single touch and hydraulic connection is made automatically, the operator does not have to leave the driver's seat, thus enabling the achievement of the goal of increasing efficiency and ensuring safety. Effects of the invention

[0031] The present invention makes it possible to connect the hydraulic line simultaneously with the connection of the work device while the worker is seated in the driver's seat of the excavator, thereby facilitating the connection of the work device and reducing unnecessary time for work preparation.

[0032] The present invention enables a single operator to connect a work tool and a hydraulic line in a one-touch manner, ensures smooth operation after connecting the work tool, and guarantees stability by preventing damage caused by interference such as twisting of the hydraulic line during the operation process.

[0033] This invention has various effects, such as eliminating the risk of safety accidents, like body entrapment, that may occur during the handling of hydraulic lines, because no additional work is required to release the hydraulic line after connecting or disconnecting the working device. Brief explanation of the drawing

[0034] FIG. 1 is an overall perspective view illustrating a work tool connecting device for an excavator to which the technology of the present invention is applied. FIG. 2 is an exploded perspective view illustrating a work tool connecting device for an excavator to which the technology of the present invention is applied. FIG. 3 is a cross-sectional view illustrating a work tool connection device for an excavator to which the technology of the present invention is applied. FIG. 4 is a longitudinal cross-sectional view illustrating a work tool connection device for an excavator to which the technology of the present invention is applied. FIG. 5 is a cross-sectional view of section A illustrating a work tool connecting device for an excavator to which the technology of the present invention is applied. FIG. 6 is an exemplary diagram illustrating the usage state of a work tool connecting device for an excavator to which the technology of the present invention is applied. Specific details for implementing the invention

[0035] The preferred configuration and operation of the present invention for achieving the above objective are described below in relation to the attached drawings.

[0036] FIG. 1 is an overall perspective view illustrating a work implement connecting device for an excavator to which the technology of the present invention is applied, FIG. 2 is an exploded perspective view illustrating a work implement connecting device for an excavator to which the technology of the present invention is applied, FIG. 3 is a cross-sectional view illustrating a work implement connecting device for an excavator to which the technology of the present invention is applied, FIG. 4 is a longitudinal section view illustrating a work implement connecting device for an excavator to which the technology of the present invention is applied, FIG. 5 is a cross-sectional view of section A extracted from a work implement connecting device for an excavator to which the technology of the present invention is applied, and FIG. 6 is an example diagram illustrating the usage state of a work implement connecting device for an excavator to which the technology of the present invention is applied.

[0037] The work tool connecting device (100) for an excavator to which the technology of the present invention is applied is equipped with a main body link frame (103) connected to the end of the boom (102) of the excavator (101) by a hinge pin, and a conventional rotation means (105) composed of a rotation cylinder and a ring gear, etc. is embedded inside the main body link frame (103) so that a work tool (104) connected to the lower part of the main body link frame (103) can be rotated in forward and reverse directions.

[0038] A workpiece connection means (110) for connecting to a workpiece (104) is installed on the lower side of the main body link frame (103), and a main body connection means (130) for connecting to the workpiece connection means (110) is installed on the upper side of the workpiece (104) so ​​that the main body link frame (103) and the workpiece (104) can be connected in a one-touch type.

[0039] The above-mentioned workpiece connection means (110) is connected to a rotation means (105) and has a connection plate (111) that rotates forward and reverse by the rotation means (105), and a cylindrical joint (113) that is fixed to the center of the connection plate (111), protrudes toward the upper center of the main body link frame (103), and has a hydraulic line hole (112) formed in the center so that a hydraulic line can be connected thereto.

[0040] It is obvious that by interposing a beam or bushing in the joint (113) so that the connecting plate (111) can rotate freely relative to the main body link frame (103), smooth operation is ensured and twisting or damage to the hydraulic line passing through the hydraulic line hole (112) can be fundamentally eliminated.

[0041] The bottom surface of the above-mentioned connecting plate (111) is provided with a box-type workpiece connecting body (115) having an internal space (114), and the lower rear side of the above-mentioned workpiece connecting body (115) is provided with a rear hook (116) integrally formed to hold the rear side of the main body connecting means (130) by hooking it.

[0042] In the above-mentioned work connecting body (115), a sliding means (117) composed of a guide rail (GL) and a guide bar (GB) is formed to connect a work hitch (118) to the work, and a hitch cylinder (119) is installed in the space of the above-mentioned work connecting body (115) to connect a rod (120) to the rear of the work hitch (118) so that the work hitch (118) can move forward and backward by means of the hitch cylinder (119).

[0043] A front hook (121) is formed on the bottom surface of the above-mentioned work tool hitch (118) to hold the front side of the main body connecting means (130) by hooking it, and a positioning pin (122) is protruded on the upper front side of the above-mentioned work tool hitch (118) for accurate coupling with the main body connecting means (130).

[0044] A hydraulic coupler (123) is fixed to the lower front side of the above-mentioned work machine hitch (118) so that a hydraulic hose (124) drawn from the excavator is connected to the rear side of the work machine hitch (118) via a hydraulic line hole (112) formed in the joint (113), and a hydraulic hose for supplying hydraulic pressure to the above-mentioned hitch cylinder (119) is positioned in the space (114) of the work machine connection body (115) through the hydraulic line hole (112) formed in the joint (113) so as not to be exposed to the outside.

[0045] It would be desirable to form a through hole on the side or back of the above-mentioned work unit connecting body (115) so that the interior can be visually inspected to check for any abnormalities in the hitch cylinder (119) or hydraulic hose (124), and to finish it with a cover or similar material so that it is not exposed in normal times, thereby ensuring maintainability in case of emergency.

[0046] On the side of the above-mentioned work connecting body (115), a safety lever (125) is further provided to slide or move in a spiral (screw) shape toward the space (114) of the work connecting body (115) so as to prevent the retraction of the work hitch (118).

[0047] The above main body connecting means (130) is provided with a plate-shaped main body connecting body (131) that is fixed to the upper surface of the working machine (104) at a predetermined distance, and the front and rear sides of the main body connecting body (131) are provided with a front pin (132) and a rear pin (133) to which a front hook (121) and a rear hook (116) can be hooked.

[0048] A main body hitch (135) that is positioned upward is fixed to the front side of the main body connecting body (131), a positioning hole (136) in which a positioning pin (122) can be coupled is formed on the inner surface of the main body hitch (135), and a female hydraulic coupler (137) for transmitting hydraulic pressure by being coupled with a hydraulic coupler (123) is mounted.

[0049] The outer part of the female hydraulic coupler (137) exposed on the outer surface of the main body hitch (135) is connected to the work cylinder mounted on the work device (104) via a hydraulic hose so as not to impede hydraulic transmission, and a stopper (138) is protruded from the upper inner surface of the main body hitch (135) to mitigate shocks that may occur during connection.

[0050] A guide with an enlarged diameter may be formed at the entrance of the positioning hole (136) to facilitate the entry of the positioning pin (122), and a spring may be embedded at the rear of the positioning pin (122) to prevent it from entering too far and causing damage to itself or the surrounding area before accurate positioning is achieved.

[0051] The process of connecting and disconnecting a work tool using a work tool connecting device (100) for an excavator to which the technology of the present invention as described above is applied is as follows.

[0052] When connecting a work device (104), the operator sits in the driver's seat of the excavator (101) and moves the boom (102) to the vicinity of the work device (104) by operating a lever, button, or switch. Then, if necessary, the rotation means (105) is used to align the direction of the work device connecting means (110) mounted on the lower part of the main body link frame (103) with that of the work device (104).

[0053] In this state, while moving the boom (102), the rear hook (116), which is integrally formed at the rear of the work connecting body (115) constituting the work connecting means (110), is coupled to the rear pin (133) constituting the main body connecting means (130) provided on the work (104) to create a first locking state.

[0054] Next, the boom (102) is brought inward toward the excavator (101) and rises, thereby lifting the work device (104) so ​​that the work device connecting means (110) and the main body connecting means (130) are aligned.

[0055] That is, when the movement is stopped while the bottom surface of the work connecting body (115) and the top surface of the main body connecting body (131) are connected, and the hitch cylinder (119) installed in the space (114) of the work connecting body (115) is extended, the work hitch (118) coupled to the sliding means (117) formed in front of the work connecting body (115) slides forward from the middle position of the work connecting body (115).

[0056] Then, the front hook (121) formed on the bottom surface of the work device hitch (118) is coupled with the front pin (132) of the main body connecting means (130) to form a lock, and at the same time, the positioning pin (122) fixed to the front upper side of the work device hitch (118) is coupled to the positioning hole (136) formed in the main body hitch (135), and the water hydraulic coupler (123) is coupled with the female hydraulic coupler (137), so there is no hindrance to the transmission of hydraulic pressure to the work device.

[0057] In this state, the connection of the work device (104) is completed, so the necessary work can be performed. In this process, to prevent the work device (104) from being separated due to the work device hitch (118) retracting because of a failure of the hitch cylinder (119) (hydraulic loss, etc.) during the work, the safety lever (125) provided on the side of the work device connection body (115) is moved toward the space (114) to prevent the retraction of the work device hitch (118) that has advanced.

[0058] When you want to detach the workpiece (104) after performing work using the workpiece (104) that requires hydraulic power as described above, release the safety lever (125) and then retract the hitch cylinder (119) to retract the workpiece hitch (118).

[0059] Then, as the front hitch (118) retracts, the positioning pin (122) and the hydraulic coupler (123) are separated from the positioning hole (136) and the female hydraulic coupler (137), and the front hook (121) is separated from the front pin (132), so the boom (102) is moved so that the working device (104) is lowered, and then the rear hook (116) is separated from the rear pin (133).

[0060] In this way, by combining the work connecting means (110) mounted on the main body link frame (103) of the boom (102) with the main body connecting means (130) mounted on the work (104), the work (104) can be connected and hydraulic power can be transmitted to the work (104) in a one-touch type, so there is no inconvenience such as the worker having to leave the driver's seat and move to the connection position to connect the hydraulic power.

[0061] By means of the joint, the hydraulic line is connected to the male and female hydraulic couples (123, 137) through the inside of the work connecting means (110), so that there is no twisting during operation, thereby eliminating hydraulic transmission failure.

[0062] The present invention has various advantages, such as the ability to connect and disconnect implements with a one-touch type and automatic hydraulic connection, which allows the operator to remain in the driver's seat without leaving, thereby increasing efficiency and ensuring safety. Explanation of the symbols

[0063] 100; Excavator working device connecting device 105; rotation means 110; working device connecting means 113; Joint 115; Working mechanism connecting body 116; rear hook 117; sliding means 118; Working tool hitch 119; Hitch cylinder 121; Front hook 122; Positioning pin 123; Hydraulic coupler 125; Safety lever 130; main body connection means 131; main body connection body 132; Front pin 133; Rear pin 135; Main body hitch 136; Positioning hole 137; Female hydraulic coupler

Claims

Claim 1 A main body link frame (103) connected to the end of the boom (102) of an excavator (101) by a hinge pin, having a rotation means (105) installed inside the main body link frame (103) to allow the work device (104) to be rotated in forward and reverse directions; a box-type work device connecting body (115) provided on the bottom surface of a connecting plate (111) having a space (114) inside, a rear hook (116) that hooks and holds the rear side of the main body connecting means (130) on the lower rear side of the work device connecting body (115), a work device hitch (118) connected to the work device by being coupled to a sliding means (117) formed on the work device connecting body (115), and a mechanism installed in the space of the work device connecting body (115) to allow the work device hitch (118) to move forward and backward along the sliding means (117). A workpiece connecting means (110) installed below the main body link frame (103) to enable connection with a workpiece (104), comprising a hitch cylinder (119) and a front hook (121) formed on the bottom surface of the workpiece hitch (118) to hook and maintain the front side of the main body connecting means (130); a main body connecting means (130) for connecting to the workpiece connecting means (110), comprising a plate-shaped main body connecting body (131) fixed to the upper surface of the workpiece (104), a front pin (132) and a rear pin (133) provided so that the front hook (121) and the rear hook (116) can be hooked on the front and rear sides of the main body connecting body (131), and a main body hitch (135) erected upward from the front side of the main body connecting body (131); and connected to the rotation means (105). A joint (113) fixed to the center of a connecting plate (111) that rotates forward and reverse by a rotating means (105), protruding to the upper center of a main body link frame (103), and having a hydraulic line hole (112) formed so that a hydraulic line can be connected to the center; the sliding means (117) includes a guide rail (GL) and a guide bar (GB) to stably move the work tool hitch (118) forward and backward; and a positioning pin (122) protruding from the upper front side of the work tool hitch (118) to enable accurate coupling with the main body connecting means (130);A workpiece connection device for an excavator, characterized by: a hydraulic coupler (123) fixed to the lower front side of the workpiece hitch (118) to connect a hydraulic hose (124) drawn from the excavator to the rear side of the workpiece hitch (118) via the hydraulic line hole (112) of the joint (113); a positioning hole (136) formed on the inner side of the main body hitch (135) so that a positioning pin (122) can be coupled thereto; a female hydraulic coupler (137) mounted to transmit hydraulic pressure by being coupled to the hydraulic coupler (123) of the workpiece connection means (110); and further including a safety lever (125) on the side of the workpiece connection body (115) that moves in and out in the direction of the space (114) of the workpiece connection body (115) to prevent the workpiece hitch (118) from retracting. Claim 2 delete Claim 3 delete Claim 4 delete

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