Excavating device

Abstract

The excavating device of the present invention includes a lower arm having a width gradually increasing from one end toward the other end, a fixing hole formed in the outer circumferential surface at the other end, a rotary arm support in a disc shape located on the other end of the lower arm and fixed to the lower arm, an upper arm located on and fixed to the rotary arm support, a guide hole formed in the outer circumferential surface of the rotary arm support, a center joint surrounded by the lower arm, the rotary arm support and the upper arm and exposed to the outside through the fixing hole of the lower arm and the guide hole of the upper arm, and a slip ring inserted into or separated from the center joint through the guide hole of the upper arm.

Description

Technical Field

[0001] The present invention relates to an excavating device comprising a bucket, a lower arm, a rotating boom, an upper arm, and a boom arranged sequentially toward the cab at the work site and rotatably coupled relative to each other, and comprising a bucket cylinder and a boom cylinder respectively located around the lower arm and the boom and rotatably coupled to the bucket and the upper arm. Background Technology

[0002] Typically, despite the increased load and volume of work objects at construction sites, waste disposal sites, or demolition sites, excavators reduce manpower input and increase operational efficiency. Therefore, Figure 1 The first excavator 160 is mainly used in construction sites, waste dumps or demolition sites, where a bucket 120 and a clamp 140 are attached to the multi-jointed arm 10, 20, 40. During the movement of the bucket cylinder 90 and the clamp cylinder 130 around the arm 10, 20, 40, the clamp 140 is engaged with the bucket 120 to transport trees, stones and waste concrete.

[0003] Reference Figure 1 In the first excavator 160, the bucket 120 is rotatably fixed to one end of the booms 10, 20, and 40, and the other end of the booms 10, 20, and 40 is rotatably fixed to a movable support (not shown) in the first excavator 160. Therefore, during the relative rotation of the booms 10, 20, and 40 relative to the movable support, the concave inlet of the bucket 120 faces either the cab opening of the first excavator 160 or faces a direction away from the cab of the first excavator 160.

[0004] The aforementioned arms 10, 20, and 40 are constructed in a columnar shape by sequentially stacking a lower rotating arm 10, a rotating actuator 20, and an upper rotating arm 40. The rotating actuator 20 causes the lower rotating arm 10 to rotate relative to the upper rotating arm 40. Furthermore, the first excavator 160 has a connecting rod structure 100 and an inclined connecting rod 110 between the lower rotating arm 10 and the bucket 120, thereby connecting the bucket 120 to the lower rotating arm 10 via the connecting rod structure 100 and the inclined connecting rod 110.

[0005] The aforementioned inclined connecting rod 110, together with the connecting rod structure 100, is integrated into the bucket 120 to allow the bucket 120 to rotate around the end of the lower rotating arm 10. Therefore, the self-rotation of the multi-joint arm and the self-rotation of the inclined connecting rod 110 differ from the movement of the connecting rod structure 100. During the relative rotation of the multi-joint arm portions 10, 20, and 40 relative to the movable support, the opening direction of the concave inlet of the bucket 120 can be continuously and freely changed. On the other hand, considering... Figure 2 and Figure 3 The lower rotating arm 10, the rotating driver 20, and the upper rotating arm 40 surround the center joint 60 and the slip ring 80.

[0006] like Figure 2 and Figure 3 As shown, the aforementioned center connector 60 includes a connector housing 54 and a connector shaft 58. The connector shaft 58 rotates relative to the connector housing 54. Figure 1 and Figure 3 As shown, the aforementioned connector cover 54 and connector shaft 58 are exposed to the outside through the first hole 5 of the lower rotating arm 10 and the second hole 35 of the upper rotating arm 40. Figure 2 As shown, the slip ring 80 includes an input end 74 and an output end 78. The input end 74 and the output end 78 of the slip ring 80 are exposed to the outside through the first hole 5 of the lower rotating arm 10 and the second hole 35 of the upper rotating arm 40.

[0007] The aforementioned input terminal 74 receives power from the first excavator 160, and the aforementioned output terminal 78 is connected to electronic equipment (e.g., a level instrument; not shown) and supplies power to the electronic equipment to the input terminal 74. However, when the output terminal 78 of the slip ring 80 is inserted into the aforementioned center connector 60, for the aforementioned upper rotating arm 40 and center connector 60, Figure 3 In this case, because the width between the upper rotating arm 40 and the connector shaft 60 in the second hole 35 of the upper rotating arm 40 is less than the diameter of a hydraulic pipe C, it is difficult to move the slip ring 80 directly from the outside to the second hole 35.

[0008] Therefore, when the aforementioned electronic equipment malfunctions or the slip ring 80 is disconnected from the input terminal 74 or the output terminal, inserting a new slip ring 80 into the center connector 60 after removing the previously used slip ring 80 from the center connector 60 will require disassembling the lower rotating arm 10 and the upper rotating arm 40 from the rotary driver 20. Furthermore, disassembling the lower rotating arm 10 and the upper rotating arm 40 from the rotary driver 20 is performed by removing multiple hydraulic pipes C from the center connector 60 and repeatedly changing the state of the multiple screw components B connecting the lower rotating arm 10 and the rotary driver 20 from a clamped state to a loose state.

[0009] Therefore, inserting a new slip ring 80 into the aforementioned center joint 60 requires a great deal of labor from the excavation workers, as it requires the disengagement of the multi-joint arms 10, 20, and 40 and the disconnection of the center joint 60 from multiple hydraulic pipes C, which delays the progress of the excavation work and damages the environment of the excavation site.

[0010] on the other hand, Figure 4 A second excavator 1084 is shown, comprising a first bucket 1014, a first bucket cylinder 1044, a first multi-joint linkage 1054, and a first movable support 1074, arranged around a first boom 1022. The first bucket 1014 is pivotally connected to the end of the first boom 1022 at one edge. The first boom 1022 is pivotally connected to the first movable support 1074 via a first movable support engagement hole 1020, to a first boom cylinder (not shown) via a first boom cylinder engagement hole 1021, and to the first bucket cylinder 1044.

[0011] The aforementioned first bucket cylinder 1044 includes a first rod 1031 and a first piston (see reference). Figure 6 (Ref. 1034) and a first cylinder 1032, wherein the first cylinder 1032 has a first pipe (ref. 1034) on the opposite side of the first rod 1031. Figure 6 The first head cover (refer to the attached figure 1036) is combined with the first head cover (see figure 1036). Figure 6 (see attached figure 1037) and the first link (refer to) Figure 6 (Ref. 1038) has a first rod cap that is combined with the first conduit near the first rod 1031 (see attached figure). Figure 6 (See attached figure 1035).

[0012] The first bucket cylinder 1044 is inserted into the first linkage shaft to engage with the first arm 1022 shaft. The first multi-joint connecting rod 1054, along with the other edge of the first bucket 1014, engages with the first arm 1022 and the first rod 1031 shaft. The first bucket 1014, according to the operation of the first bucket cylinder 1044, deforms around the first arm 1022 through the shape deformation of the first multi-joint connecting rod 1054. Figure 7 Similarly, the aforementioned first arm 1022 rotates around the first movable bracket 1074 according to the operation of the first arm cylinder. Figure 7 Rotate in a similar manner.

[0013] like Figure 4As shown, when the first rod 1031 is minimally exposed from the first rod cover, the first bucket cylinder 1044 has a first length L1 between the center of the first link and the end of the first rod 1031. The first arm 1022 has a second length L2 between the center of the first movable bracket engagement hole 1020 and the end of the first arm 1022. As the first bucket cylinder 1044 operates, the first arm 1022 causes the first bucket 1014 to operate, thus increasing proportionally to the length of the first bucket cylinder 1044.

[0014] like Figure 4 As shown, when the first rod 1031 is minimally exposed from the first rod cover, the second excavator 1084 has the end of the first rod 1031 on an extension line X1 perpendicular to the first boom cylinder engagement hole 1021. The second excavator 1084 moves the first bucket 1014 only around the first boom 1022.

[0015] As another example, Figure 5 A third excavator 1088 is shown, having a second bucket 1018, a second bucket cylinder 1048, a second articulated link 1058, a rotating boom 1065, and a second movable support 1078 around the second boom 1029. The aforementioned second bucket 1018, second boom 1029, second bucket cylinder 1048, second articulated link 1058, and second movable support 1078 perform functions related to… Figure 4 The first bucket 1014, the first boom 1022, the first bucket cylinder 1044, the first multi-joint connecting rod 1054, and the first movable support 1074 have similar functions.

[0016] In order to have different functions from the second excavator 1084, the second boom 1029 of the third excavator 1088 is subdivided into a second lower boom 1024 and a second upper boom 1028. The rotating boom 1065 is located between the second lower boom 1024 and the second upper boom 1028, so that the second lower boom 1024 can rotate relative to the second upper boom 1029. The second bucket cylinder 1048 maintains the same structure as the first bucket cylinder 1044.

[0017] Specifically, Figure 6 In this design, the second bucket cylinder 1048 includes a second rod 1033, a second piston 1034, and a second cylinder 1039. The second cylinder 1039 includes a second rod cap 1035, a second pipe 1036, a second head cap 1037, and a second connecting ring 1038. To maintain a similar length to the first bucket cylinder 1044, the second bucket cylinder 1048 is formed by reducing the length of the second pipe 1036 relative to the length of the first pipe of the first bucket cylinder 1044, and by providing a rotating boom 1065 between the second lower arm 1024 and the second upper arm 1028.

[0018] Therefore, the second bucket cylinder 1048 has a third length L3 that is smaller than the first length L1 of the first bucket cylinder 1044 between the center of the second link 1038 and the end of the second rod 1033. Furthermore, the second arm 1029 is formed with a reduced length relative to the length of the first arm 1022, corresponding to the length of the second bucket cylinder 1044. Therefore, the second arm 1029 has a fourth length L4 that is smaller than the second length L2 between the center of the second movable support engagement hole 1026 and the end of the second lower arm 1024.

[0019] like Figure 5 As shown, when the third excavator 1088 is in the state of the second bucket cylinder 1048 corresponding to the third length L3 and the second boom 1029 corresponding to the fourth length L4, during the operation of the third excavator 1088, Figure 7 In the process, the second bucket 1018 performs a first semi-circular motion (radius D1) relative to the second lower arm 1024, and the second arm 1029 together with the rotating boom 1065 performs a second semi-circular motion (radius D2) relative to the movable support 1078.

[0020] Furthermore, since the second bucket 1018 maintains a predetermined small distance 1019 from the ground 1005, during the operation of the third excavator 1088, the operator of the third excavator 1088 needs to frequently raise the second boom 1029 upwards via the movable support 1078 due to the abnormal contact between the second bucket 1018 and the ground 1005. On the other hand, referring to... Figure 5 and Figure 6 When the second rod 1033 is exposed to the minimum extent from the second rod cover 1035, the aforementioned third excavator 1088 has the end of the second rod 1033 on the extension line X2 that is perpendicular to the second arm cylinder engagement hole 1027.

[0021] Furthermore, the aforementioned second lower arm 1024 and rotating arm 1065 have an internal center joint 1023, which protrudes outward from the second upper arm 1028 through a second sliding part inlet / outlet hole 1025. The center joint 1023 and the sliding part inlet / outlet hole 1025 are separated from each other by an extension line X2 within the second upper arm 1028. Overall, Figure 5 and Figure 7 In this context, considering the shape of the third excavator 1088, it is difficult to add an attachment between the second bucket 1018 and the second lower arm 1024. Summary of the Invention

[0022] Technical issues

[0023] The present invention is proposed to solve the problems of the prior art. The purpose of the present invention is to provide an excavating device in which a slip ring is easily inserted into the center joint without disassembling the lower arm, rotating arm and upper arm, by means of a lower arm, rotating arm and upper arm surrounding a central joint.

[0024] Furthermore, this invention addresses the problems of the prior art. The object of this invention is to provide an excavating device in which, after the boom is subdivided based on the rotating boom using a rotating boom, a lower boom is provided below the rotating boom, and an upper boom is provided above the rotating boom. The shape of the upper boom is changed to reduce the length of the upper boom along the length direction of the boom, and the structure of the bucket cylinder rotatably coupled to the lower boom is changed to reduce the length of the lower boom along the length direction of the boom, thereby increasing the margin for excavation operations.

[0025] Technical solution

[0026] The excavating device of the present invention is characterized by comprising: a lower arm having a width that gradually increases from one end to the other end, wherein a fixing hole is formed on the outer peripheral surface of the other end; a rotating boom, which is disc-shaped and located on the other end of the lower arm, and is rotatably fixed to the lower arm; an upper arm located on and fixed to the rotating boom, wherein a guide hole is formed on the outer peripheral surface of the rotating boom; a center joint surrounded by the lower arm, the rotating boom, and the upper arm, and exposed to the outside through the fixing hole of the lower arm and the guide hole of the upper arm; and a slip ring inserted into or separated from the center joint through the guide hole of the upper arm. From an external perspective, the width of the central space between the upper arm and the center joint, with the uppermost end of the center joint as a reference, is greater than the diameter of two hydraulic pipes within the guide hole of the upper arm.

[0027] The aforementioned rotating boom may include: a lower rotating frame and an upper rotating frame, which are stacked sequentially on the lower boom; and a drive motor unit that causes the lower rotating frame to rotate relative to the upper rotating frame, and the lower rotating frame and the upper rotating frame are respectively connected to the lower boom and the upper boom.

[0028] The lower arm may have a placement hole on a surface perpendicular to the length direction of the lower arm. When the rotating boom has a lower rotating frame, an upper rotating frame, and a through hole passing through the central region of the lower rotating frame and the upper rotating frame in sequence, the central connector includes: a connector cover, which is inserted into the placement hole and fixed to the lower rotating frame of the rotating boom; and a connector shaft, which is inserted into the connector cover and rotates relative to the connector cover, and protrudes toward the upper arm through the through hole of the rotating boom.

[0029] The slip ring may include: a fixed portion located outside the center connector; a rotating portion that is snapped into the fixed portion and located outside the center connector, and rotates relative to the fixed portion; an input end that extends from the rotating portion toward one side of the rotating portion; and an output end that extends from the rotating portion toward the other side of the rotating portion.

[0030] The aforementioned center connector may include a connector housing and a connector shaft inserted into the connector housing. When the slip ring is inserted into the connector housing and the connector shaft while detached from the center connector, the output end of the slip ring is inserted into the guide hole of the upper arm and passes sequentially through the connector shaft and the connector housing to protrude into the fixing hole of the lower arm. Then, it is pulled outward from the fixing hole of the lower arm. During the pulling of the output end, the fixing part and the rotating part of the slip ring are guided to the guide hole of the upper arm and partially inserted into the connector shaft. During the pulling of the output end, the input end of the slip ring, together with the fixing part and the rotating part, is guided to the guide hole of the upper arm and extends outward from the rotating part through the guide hole of the upper arm.

[0031] The aforementioned center connector may include a connector housing and a connector shaft inserted into the connector housing. When the slip ring is separated from the connector housing and the connector shaft while engaged with the center connector, the input end of the slip ring is pulled outward from the guide hole of the upper arm. During the pulling of the input end, the fixed part and the rotating part of the slip ring separate from the connector shaft and are guided outward from the guide hole of the upper arm. During the pulling of the input end, the output end of the slip ring is separated from the connector shaft by the connector housing and the connector shaft in sequence.

[0032] The excavator may also include a cover plate on the guide hole of the upper arm. The upper arm includes: a circular peripheral portion formed in the guide hole of the upper arm on the center joint; and a coupling ring, a plurality of which are provided in the circular peripheral portion. The cover plate includes a coupling hole aligned with the coupling ring of the circular peripheral portion and a screw component. The screw component is inserted into the coupling hole of the cover plate and the coupling ring of the circular peripheral portion to engage with the upper arm screw.

[0033] The excavator may also include a cover on the guide hole of the upper arm. The upper arm includes: a circular periphery formed in the guide hole of the upper arm on the center joint; and a snap-in groove provided in the circular periphery. The cover includes a snap-in protrusion aligned with the snap-in groove of the circular periphery. The snap-in protrusion of the cover is inserted into the snap-in groove of the circular periphery and snapped into the upper arm.

[0034] The excavator may also include a cover on the guide hole of the upper arm. The upper arm includes: a circular periphery formed in the guide hole of the upper arm on the center joint; and two auxiliary hinges formed in the circular periphery. The cover includes a main hinge and a hinge pin aligned with the two auxiliary hinges of the circular periphery. The hinge pin is inserted into each of the auxiliary hinges of the circular periphery and the main hinge of the cover to hinge the upper arm.

[0035] The excavator further includes a cover on the guide hole of the upper arm. The upper arm includes: a circular periphery formed in the guide hole of the upper arm on the central joint; two auxiliary hinges located in the central region of the circular periphery; and two magnets located at the two edges of the circular periphery. The cover includes a main hinge and a hinge pin aligned with the two auxiliary hinges of the circular periphery. The hinge pin is inserted into each of the auxiliary hinges of the circular periphery and the main hinge of the cover to hinge the upper arm and be attracted by the magnetic force of each of the magnets of the circular periphery.

[0036] When the upper arm has a circular periphery located on the center connector in a guide hole on one side of the upper arm and an angular periphery located on the center connector in a guide hole on the other side of the upper arm, the guide hole of the circular periphery can form a larger opening in the upper arm, with the uppermost end of the center connector as a reference, compared with the guide hole of the angular periphery.

[0037] When the upper arm has a circular periphery located on the center joint in a guide hole on one side of the upper arm and an angular periphery located on the center joint in a guide hole on the other side of the upper arm, with the uppermost end of the center joint as a reference, the circular periphery can be more recessed in the upper arm than the angular periphery, and the resulting curvature is equal to the curvature of the ceiling facing the center joint.

[0038] The excavator may further include: a bucket cylinder and a clamping cylinder, respectively located on one side and the other side of the lower arm, and rotatably fixed to the other end of the lower arm; a connecting rod structure located at one end of the lower arm and rotatably fixed to the lower arm and the bucket cylinder; a tilting link located below the connecting rod structure and rotatably fixed to the connecting rod structure; a bucket located below the tilting link and rotatably fixed to the tilting link; and a clamp located at one end of the lower arm and rotatably fixed to the lower arm and the clamping cylinder.

[0039] Furthermore, the excavating device of the present invention comprises a bucket, a lower arm, a rotating boom, an upper arm, and a movable support arranged sequentially towards the cab at the work site and rotatably coupled relative to each other, and includes a bucket cylinder and a boom cylinder respectively located around the lower arm and the movable support and rotatably coupled to the bucket and the upper arm. The device is characterized in that, when the upper arm includes a movable support coupling hole and a boom cylinder coupling hole sequentially located on the rotating boom, the lower arm passes perpendicularly through the boom cylinder coupling hole of the upper arm and is located on the central axis of the upper arm, which overlaps more than half the length of the lower arm. The upper arm is directly above the rotating boom such that the movable support coupling hole protrudes more than the rotating boom towards the side of the upper arm. The bucket cylinder is rotatably mounted on the lower arm through its two sides.

[0040] When there is a multi-joint connecting rod between the bucket, the lower arm, and the bucket cylinder, the lower arm can be sequentially connected to the bucket and the multi-joint connecting rod shaft along the length of the lower arm, next to the central axis of the upper arm.

[0041] The aforementioned bucket cylinder may include a rod, a piston, and a cylinder. The cylinder includes: a head cover located directly below the rotating boom; a pipe connected to the head cover; a rod cover connected to the pipe on the opposite side of the head cover; and a connecting rod that rotatably connects the pipe to the lower boom. The rod is located inside and outside the pipe, surrounded by the rod cover, and moves relative to the cylinder. The piston is located inside the pipe and moves together with the rod.

[0042] When the lower arm has multi-joint links located on both sides and connected to the lower arm axis, the links and multi-joint links can move away from the central axis of the upper arm together as they are connected to the multi-joint link axis and exposed to the minimum extent from the rod cover around the lower arm, or the links and multi-joint links can move closer to the central axis of the upper arm together as they are exposed to the maximum extent from the rod cover.

[0043] When the rod is exposed to the minimum extent from the rod cover, the rod, the rod cover, the pipe, and the head cover can be separated from the central axis of the upper arm and gradually moved away in the order of rod, rod cover, pipe, and head cover.

[0044] When the rod is exposed to its maximum extent from the rod cover, the rod, the rod cover, the pipe, and the head cover can be positioned on the central axis of the upper arm and gradually moved away in the order of the rod, the rod cover, the pipe, and the head cover.

[0045] When the lower arm has brackets on both sides of the pipe, the hanging rod may include: a support portion having a cylindrical protrusion that surrounds the pipe and extends toward the bracket; and a locking portion that, together with the bracket, surrounds the protrusion in a curved manner and is screwed into the bracket.

[0046] The present invention may have a multi-joint linkage rotatably coupled to the bucket, the lower arm, and the bucket cylinder when the rod is minimally exposed from the rod cover. The multi-joint linkage is coupled to the lower arm shaft beside the central axis of the upper arm. The multi-joint linkage is coupled to the bucket shaft in such a way that the distance from the central axis of the upper arm to the lower arm is less than the distance from the central axis of the upper arm to the bucket. The multi-joint linkage is coupled to the rod shaft of the bucket cylinder in such a way that the distance from the central axis of the upper arm to the bucket is less than the distance from the central axis of the upper arm to the bucket cylinder.

[0047] The present invention may have a multi-joint linkage that is rotatably coupled to the bucket, the lower arm, and the bucket cylinder when the rod is exposed to its maximum extent from the rod cover. The multi-joint linkage is located to the left and right of the central axis of the upper arm and is coupled to the lower arm and the rod shaft. The multi-joint linkage is coupled to the bucket shaft in such a way that the distance from the central axis of the upper arm to the lower arm is less than the distance from the central axis of the upper arm to the bucket.

[0048] The aforementioned rotating boom may have a lower rotating frame and an upper rotating frame stacked sequentially between the lower arm and the upper arm, respectively fixing the lower rotating frame and the upper rotating frame to the lower arm and the upper arm, so that the lower rotating frame rotates relative to the upper rotating frame, and having a central joint that passes through the lower rotating frame and the upper rotating frame together with the lower arm, the central joint being located on the central axis of the upper arm.

[0049] The upper arm may have a sliding part inlet / outlet hole, a movable bracket engagement hole, and a boom cylinder engagement hole on the lower, middle, and upper sides of the upper arm. When the lower arm and the rotating boom have a center joint on the central axis of the upper arm, the sliding part inlet / outlet hole of the upper arm exposes the center joint to the outside on the central axis of the upper arm and guides the sliding part to engage with the center joint or to separate the sliding part from the center joint.

[0050] When the upper arm has a sliding part inlet / outlet hole, a movable bracket coupling hole, and an arm cylinder coupling hole on its lower, middle, and upper sides, the sliding part inlet / outlet hole of the upper arm can be located on the central axis of the upper arm and on the same horizontal plane as the movable bracket coupling hole in a direction perpendicular to the central axis of the upper arm.

[0051] When the upper arm has a sliding part inlet / outlet hole, a movable bracket connecting hole, and an arm cylinder connecting hole on its lower, middle, and upper sides, the sliding part inlet / outlet hole and the arm cylinder connecting hole of the upper arm can be located on the central axis of the upper arm.

[0052] When the device includes a rotating link, the aforementioned bucket cylinder, clamping cylinder, clamp, and multi-joint link, the bucket and the aforementioned rotating link can fold or unfold the aforementioned multi-joint link and rotate around the aforementioned central axis of the upper arm according to the operation of the aforementioned bucket cylinder. The aforementioned clamp is engaged with the aforementioned lower arm axis near the aforementioned central axis of the upper arm. According to the operation of the aforementioned clamping cylinder, it moves relative to the aforementioned lower arm and rotates up and down. The aforementioned rotating link is engaged with the aforementioned bucket and the aforementioned lower arm. The aforementioned bucket cylinder is located on one side of the aforementioned lower arm and is engaged with the aforementioned lower arm. The aforementioned clamping cylinder is located on the other side of the aforementioned lower arm and is engaged with the aforementioned lower arm. The aforementioned clamp is located at the end of the aforementioned lower arm and is engaged with the aforementioned lower arm. The aforementioned multi-joint link is engaged with the aforementioned lower arm, the aforementioned rotating link, and the aforementioned bucket cylinder.

[0053] The effects of the invention

[0054] In the excavation device of the present invention, a lower arm, a rotating boom, and an upper arm are stacked sequentially in a manner forming a multi-joint arm. A fixing hole is located on the lower arm directly below the rotating boom, and a guide hole is located on the upper arm directly above the rotating boom. A central joint is inserted into the lower arm, the rotating boom, and the upper arm. The fixing hole of the lower arm exposes the joint cover of the central joint, and the guide hole of the upper arm exposes the joint shaft of the central joint. In the guide hole of the upper arm, with the uppermost end of the central joint as a reference, the width of the central space between the joint shaft and the upper arm is greater than the diameter of two hydraulic pipes. Therefore, by having the lower arm, the rotating boom, and the upper arm surround the central joint, a slip ring can be easily inserted into the central joint without disassembling the lower arm, the rotating boom, and the upper arm.

[0055] In the excavation apparatus of the present invention, after the boom is subdivided based on the rotating boom using a rotating boom, a lower boom is provided below the rotating boom and an upper boom is provided above the rotating boom. Along the length direction of the boom, the shape of the upper boom is reduced toward the rotating boom, and an upper boom larger than the rotating boom is formed along a direction perpendicular to the length direction of the boom. The linkage in the bucket cylinder is removed from the cylinder and the pipe is rotatably connected to the lower boom through the outer peripheral surface of the pipe. The rotation of the bucket around the lower boom is appropriately reflected based on the minimum exposed length and the maximum exposed length of the rod from the rod cover of the cylinder. Therefore, by changing the shape of the upper boom to reduce the length of the upper boom along the length direction of the boom, and by changing the structure of the bucket cylinder rotatably connected to the lower boom to reduce the length of the lower boom along the length direction of the boom, the margin for excavation work can be increased. Attached Figure Description

[0056] Figure 1 A side view of a first excavator in the prior art is shown in part.

[0057] Figure 2 To show Figure 1 An image showing the connection between the center joint and the slip ring in the first excavator.

[0058] Figure 3 To show Figure 1 An image of the first excavator, showing the center joint (slip ring not shown) of the lower rotating arm, rotating drive, and upper rotating arm.

[0059] Figure 4 A side view of a second excavator according to an embodiment of the prior art.

[0060] Figure 5 A side view of a third excavator to illustrate another embodiment of the prior art.

[0061] Figure 6 For brevity Figure 5 Side view of the bucket cylinder in the third excavator.

[0062] Figure 7 To show Figure 5 A simplified diagram of the third excavator at work.

[0063] Figure 8 A side view of the first excavation device of the present invention is shown in part.

[0064] Figure 9 For partial display Figure 8 An exploded perspective view of the first excavating device.

[0065] Figure 10 To show by region Figure 8 An image of the central joint located at the lower arm, drive motor section, and upper arm of the first excavating device.

[0066] Figure 11 To show Figure 10 An image showing the positional relationship between the upper arm and the center connector.

[0067] Figure 12 To show the location Figure 11 Image of the upper arm cover.

[0068] Figure 13 for Figure 12 The first variation of the upper arm and the cover plate.

[0069] Figure 14 for Figure 12 The second variation of the upper arm and the cover plate.

[0070] Figure 15 for Figure 12 The third variation of the upper arm and the cover plate.

[0071] Figure 16 A side view of the second digging device of the present invention is shown.

[0072] Figure 17 Showing a partially enlarged view Figure 16 A side view of the second excavating device.

[0073] Figure 18 Showing a partially enlarged view Figure 16 A perspective view of the second excavating device.

[0074] Figure 19 Showing a partially enlarged view Figure 18 A 3D view of the bucket cylinder.

[0075] Figure 20 To show Figure 19 A simplified diagram showing the rod protruding to its maximum extent from the cylinder in the bucket cylinder.

[0076] Figure 21 To show Figure 19 A simplified diagram showing the minimum extent to which the rod protrudes from the cylinder in the bucket cylinder.

[0077] Figure 22 To illustrate the additional installation Figure 16 Side view of the rotating linkage, clamp, and clamping cylinder of the second excavating device. Detailed Implementation

[0078] Hereinafter, in order to enable those skilled in the art to easily implement the present invention, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0079] Figure 8 To partially show a side view of the first excavating device of the present invention, Figure 9 For partial display Figure 8 Exploded perspective view of the first excavating device. Figure 10 To show by region Figure 8 An image of the central joint located at the lower arm, drive motor section, and upper arm of the first excavating device.

[0080] Figure 11 To show Figure 10 An image showing the positional relationship between the upper arm and the center connector. Figure 12 To show the location Figure 11 Image of the upper arm cover.

[0081] in, Figures 8 to 12 Shown with the following Figures 13 to 15 Improve together Figures 1 to 3 The structure of the first excavator.

[0082] Reference Figures 8 to 12 ,exist Figure 8 In this invention, the first excavating device 410 includes a lower arm 210, a rotating boom 230, an upper arm 250, a center joint 270, and a slip ring 289. Simply put, in... Figures 8 to 10 In the middle, the lower arm 210 has a width that gradually increases from one end to the other end, and at the other end, a fixing hole 208 is provided on the outer peripheral surface.

[0083] exist Figures 8 to 10 In this configuration, the aforementioned rotating boom 230 is disc-shaped, located on the other end of the lower boom 210, and rotatably fixed to the lower boom 210. Figures 8 to 10 In the above, the upper arm 250 is located on and fixed to the rotating arm 230, and the rotating arm 230 has a guide hole 244 on its outer peripheral surface.

[0084] exist Figures 8 to 10In this configuration, the aforementioned center joint 270 is surrounded by the lower arm 210, the rotating arm 230, and the upper arm 250, and is exposed to the outside through the fixing hole 208 of the lower arm 210 and the guide hole 244 of the upper arm 250. Considering Figure 10 The slip ring 289 is directly inserted into the center connector 270 from the outside through the guide hole 244 of the upper arm 250 or directly separated from the center connector 270 towards the outside.

[0085] The aforementioned center joint 270 and slip ring 289 have the same characteristics as... Figure 2 The center joint 60 and slip ring 80 have the same shape. Figure 10 and Figure 11 In the above-mentioned upper arm 250 and center connector 270, from the appearance, in the guide hole 244 of the upper arm 250, with the uppermost end of the center connector 270 as the reference, the width of the central space between the upper arm 250 and the center connector 270 is greater than the diameter of the two hydraulic pipes E.

[0086] More in detail, Figures 8 to 10 In the above-mentioned rotating boom 230, there are: a lower rotating frame 223 and an upper rotating frame 226, which are stacked on the lower arm 210 in sequence; and a drive motor 229, which causes the lower rotating frame 223 to rotate relative to the upper rotating frame 226, and the lower rotating frame 223 and the upper rotating frame 226 are respectively connected to the lower arm 210 and the upper arm 250.

[0087] exist Figure 9 In the middle, the lower arm 210 has a placement hole 204 on a surface perpendicular to the length direction of the lower arm 210. Figure 9 In the case where the aforementioned rotating boom 230 has a lower rotating frame 223, an upper rotating frame 226 stacked sequentially, and a through hole 225 passing through the central region of the lower rotating frame 223 and the upper rotating frame 226, in Figures 8 to 10 In the above-mentioned center connector 270, there are a connector cover 264 and a connector shaft 268.

[0088] Considering Figure 9 and Figure 10 The aforementioned connector cover 264 is inserted into the placement hole 204 in the lower arm 210 and fixed to the lower rotating frame 223 of the rotating arm 230. Considering Figure 9 and Figure 10 The aforementioned connector shaft 268 is inserted into the connector cover 264 and rotates relative to the connector cover 264, protruding towards the upper arm 250 through the through hole 225 of the rotating arm 230.

[0089] Considering Figures 9 to 11The slip ring 289 includes: a fixed portion 282 located outside the center connector 270; a rotating portion 284 that is snapped into the fixed portion 282 and located outside the center connector 270, and rotates relative to the fixed portion 282; an input end 286 that extends from the rotating portion 284 toward one side of the rotating portion 284; and an output end 288 that extends from the rotating portion 284 toward the other side of the rotating portion 284.

[0090] exist Figure 9 and Figure 10 In this configuration, the aforementioned center connector 270 has a connector cover 264 and a connector shaft 268 inserted into the connector cover 264. Figure 9 and Figure 10 When the slip ring 289 is inserted into the connector cover 264 and the connector shaft 268 while detached from the center connector 270, refer to... Figures 9 to 11 The output end 288 of the slip ring 289 is inserted into the guide hole 244 of the upper arm 250 and passes through the connector shaft 268 and the connector cover 264 in sequence, and then protrudes into the fixing hole 208 of the lower arm 210. After that, it is pulled outward from the fixing hole 208 of the lower arm 210.

[0091] Furthermore, referring to Figures 9 to 11 During the pulling of the output end 288, the fixing part 282 and the rotating part 284 of the slip ring 289 are guided to the guide hole 244 of the upper arm 250 and partially inserted into the connector shaft 268. (Refer to...) Figures 9 to 11 During the period when the output end 288 is pulled, the input end 286 of the slip ring 289, together with the fixed part 282 and the rotating part 284, is guided to the guide hole 244 of the upper arm 250, and extends outward from the rotating part 284 through the guide hole 244 of the upper arm 250.

[0092] In contrast, Figure 9 and Figure 10 In the above-mentioned center connector 270, there is a connector cover 264 and a connector shaft 268 inserted into the connector cover 264. Figure 9 and Figure 10 In the process, when the slip ring 289 is separated from the connector cover 264 and the connector shaft 268 while engaged with the center connector 270, refer to Figures 9 to 11 The input end 286 of the slip ring 289 is pulled outward from the guide hole 244 of the upper arm 250.

[0093] Furthermore, referring to Figures 9 to 11 During the pulling of the input end 286, the fixed portion 282 and the rotating portion 284 of the slip ring 289 separate from the connector shaft 268 and are guided to the outside through the guide hole 244 of the upper arm 250. (Refer to...) Figures 9 to 11During the period when the input end 286 is pulled, the output end 288 of the slip ring 289 passes through the connector cover 264 and the connector shaft 268 in sequence and is separated from the connector shaft 268.

[0094] Considering Figure 11 and Figure 12 The aforementioned first excavating device 410 also includes a cover 300 on the guide hole 244 of the upper arm 250. Among these, in Figure 10 and Figure 11 In the above-mentioned upper arm 250, there are: a circular peripheral portion R, formed in the guide hole 244 of the upper arm 250 on the central connector 270; and a plurality of connecting rings 242 provided in the circular peripheral portion R. Considering Figures 10 to 12 The aforementioned cover 300 includes a coupling hole 294 aligned with a coupling ring 242 of the circular periphery R and a screw component 298. The screw component 298 is inserted into the coupling hole 294 and the coupling ring 242 of the circular periphery R of the cover 300 to screw it onto the upper arm 250.

[0095] Considering Figure 8 and Figure 10 and Figure 11 When the upper arm 250 has a circular peripheral portion R located on the center joint 270 in the guide hole 244 on one side of the upper arm 250 and an angular peripheral portion S located on the center joint 270 in the guide hole 248 on the other side of the upper arm 250, considering Figure 8 and Figure 10 and Figure 11 Compared to the guide hole 248 of the angular periphery S, with the uppermost end of the center connector 270 as a reference, the guide hole 244 of the circular periphery R forms a larger opening in the upper arm 250 between the center connector 270 and the upper arm 250.

[0096] Furthermore, considering Figure 8 and Figure 10 and Figure 11 When the upper arm 250 has a circular peripheral portion R located on the center joint 270 in the guide hole 244 on one side of the upper arm 250 and an angular peripheral portion S located on the center joint 270 in the guide hole 248 on the other side of the upper arm 250, consider Figure 10 and Figure 11 With the uppermost end of the center joint 270 as a reference, the circular periphery R is more recessed in the upper arm 250 than the angular periphery S, and the resulting curvature is equal to the curvature of the ceiling opposite the center joint 270.

[0097] On the other hand, Figure 8The first excavating device 410 further includes a bucket cylinder 350, a connecting rod structure 360, an inclined connecting rod 370, a bucket 380, a clamping cylinder 390, and a clamp 400. The bucket cylinder 350 and the clamping cylinder 390 are located on one side and the other side of the lower arm 210, respectively, and are rotatably fixed to the other end of the lower arm 210. The connecting rod structure 360 ​​is located at one end of the lower arm 210 and is rotatably fixed to both the lower arm 210 and the bucket cylinder 350.

[0098] Furthermore, the aforementioned inclined connecting rod 370 is located below the connecting rod structure 360 ​​and is rotatably fixed to the connecting rod structure 360. The aforementioned bucket 380 is rotatably fixed to the inclined connecting rod 370 below it. The aforementioned clamp 400 is located at one end of the lower arm 210 and is rotatably fixed to the lower arm 210 and the clamping cylinder 390.

[0099] Figure 13 for Figure 12 The first variation of the upper arm and the cover plate.

[0100] Reference Figure 13 In the first modified embodiment of the present invention, the upper arm 253 and the cover 320 have the same... Figures 10 to 12 The upper arm 250 and the cover 300 have different structures. More specifically, the first digging device 410 described above also includes a cover 320 on the guide hole 249 of the upper arm 253.

[0101] consider Figure 11 and Figure 13 The aforementioned upper arm 253 includes: a circular peripheral portion R, located on the central connector 270 within a guide hole 249 of the upper arm 253; and multiple snap-fit ​​grooves 245 provided in the circular peripheral portion R. Figure 13 In the above-mentioned cover 320, there is a snap-in protrusion 315 that is aligned with the snap-in groove 245 of the circular peripheral portion R. The snap-in protrusion 315 of the cover 320 is inserted into the snap-in groove 245 of the circular peripheral portion R to snap into and attach to the upper arm 253.

[0102] Figure 14 for Figure 12 The second variation of the upper arm and the cover plate.

[0103] Reference Figure 14 In the second variation of the present invention, the upper arm 256 and the cover 340 have the same... Figures 10 to 12 The upper arm 250 and the cover 300 have different structures. More specifically, the first digging device 410 described above also includes a cover 340 on the guide hole 249 of the upper arm 256.

[0104] consider Figure 11 and Figure 14The aforementioned upper arm 256 includes: a circular peripheral portion R, located on the central connector 270 within the guide hole 249 of the upper arm 256; and two auxiliary hinges 246 disposed on the circular peripheral portion R. Figure 14 In the above-mentioned cover 340, there is a main hinge 334 and a hinge pin 338 aligned with two auxiliary hinges 246 of the circular periphery R. The hinge pin 338 is inserted into each of the auxiliary hinges 246 of the circular periphery R and the main hinge 334 of the cover 340 to hinge them together with the upper arm 256.

[0105] That is, the aforementioned cover 340 is hinged to the upper arm 256 and rotated R1 to be fixed to the upper arm 256.

[0106] Figure 15 for Figure 12 The third variation of the upper arm and the cover plate.

[0107] Reference Figure 15 In the third variation of the present invention, the upper arm 259 and the cover 340 have the same... Figures 10 to 12 The upper arm 250 and the cover 300 have different structures. More specifically, the first digging device 410 described above also includes a cover 340 on the guide hole 249 of the upper arm 259.

[0108] consider Figure 11 and Figure 15 The aforementioned upper arm 259 includes: a circular peripheral portion R, located on the central connector 270 within a guide hole 249 of the upper arm 259; two auxiliary hinges 246 located in the central region of the circular peripheral portion R; and two magnets 247 located at the two edges of the circular peripheral portion R. Figure 15 In the above-mentioned cover 340, there is a main hinge 334 and a hinge pin 338 aligned with two auxiliary hinges 246 of the circular periphery R. The hinge pin 338 is inserted into each of the auxiliary hinges 246 of the circular periphery R and the main hinge 334 of the cover 340 to hinge the upper arm 259 and be attracted by the magnetic force of each of the magnets 247 of the circular periphery R.

[0109] That is, the aforementioned cover 340 is hinged to the upper arm 259 and rotated R2 to be fixed to the upper arm 259.

[0110] Figure 16 To show a side view of the second digging device of the present invention, Figure 17 Showing a partially enlarged view Figure 16 Side view of the second excavating device. Figure 18 Showing a partially enlarged view Figure 16 A perspective view of the second excavating device.

[0111] Figure 19 Showing a partially enlarged view Figure 18 A 3D view of the bucket cylinder. Figure 20 To show Figure 19 A simplified diagram showing the rod protruding to its maximum extent from the cylinder in the bucket cylinder.

[0112] and, Figure 21 To show Figure 19 A simplified diagram showing the minimum extent to which the rod protrudes from the cylinder in the bucket cylinder. Figure 22 To illustrate the additional installation Figure 16 Side view of the rotating linkage, clamp, and clamping cylinder of the second excavating device.

[0113] in, Figures 16 to 22 Showing improvement Figures 4 to 7 The structure of the second and third excavators.

[0114] Reference Figures 16 to 22 The second excavating device 1210 of the present invention has a bucket 1095, a lower arm 1103, a rotating boom 1189, an upper arm 1109, and a movable support 1195 arranged sequentially toward the cab at the work site and rotatably coupled relative to each other, and includes a bucket cylinder 1160 and a boom cylinder (not shown) located around the lower arm 1103 and the movable support 1195 and rotatably coupled to the bucket 1095 and the upper arm 1108, respectively.

[0115] Simply put, in Figure 16 and Figure 17 In the case where the upper arm 1108 includes a movable bracket engagement hole 1105 and a boom cylinder engagement hole 1106 sequentially located on the rotating boom 1189, in Figure 16 In this case, the lower arm 1103 is located on the central axis of the upper arm 1108, which overlaps with and passes perpendicularly through the arm cylinder engagement hole 1106 of the upper arm 1108 and is located more than half the length of the lower arm 1103.

[0116] Furthermore, in Figure 17 In this configuration, the upper arm 1108 is positioned directly above the rotating boom 1189, causing the movable support engagement hole 1105 to protrude more towards the side of the upper arm 1108 than the rotating boom 1189. Figures 16 to 19 In this configuration, the aforementioned bucket cylinder 1160 is rotatably mounted on the lower arm 1103 via both sides of the bucket cylinder 1160.

[0117] More in detail, such as Figure 16 As shown, when the second digging device 1210 has a multi-joint connecting rod 1175 between the bucket 1095, the lower arm 1103, and the bucket cylinder 1160, in Figure 16 In the middle, the lower arm 1103 is connected to the bucket 1095 and the multi-joint connecting rod 1175 shaft in sequence along the length direction of the lower arm 1103 next to the central axis X3 of the upper arm 1108.

[0118] exist Figures 16 to 21 The aforementioned bucket cylinder 1160 includes a rod 1115, a piston 1126, and a cylinder 1155. Figures 16 to 21 In the above-mentioned cylinder 1155, there are: a head cover 1139 located directly below the rotating arm 1189; a pipe 1133 connected to the head cover 1139; a rod cover 1136 connected to the pipe 1133 on the opposite side of the head cover 1139; and a hanging rod 1149 that allows the pipe 1133 to be rotatably connected to the lower arm 1103.

[0119] exist Figures 16 to 21 In this configuration, the aforementioned rod 1115 is located inside and outside the pipe 1133, surrounded by the rod cap 1136, and moves relative to the cylinder 1155. Figure 20 and Figure 21 In this configuration, the piston 1126 is located inside the pipe 1133 and moves together with the rod 1115. The bucket cylinder 1160 does not have... Figure 6 The second cylinder 1039 disclosed in the paper has a second ring 1038.

[0120] This is because the aforementioned second link 1038 does not contribute to the moving speed of the second piston 1034 in the second cylinder 1039. That is, from Figure 20 and Figure 21 In this context, the cylinder 1155 manages the uniform and decelerating motion of the piston 1126. Specifically, the uniform motion of the piston 1126 is limited by the dimensions of the pipe 1133.

[0121] Furthermore, the deceleration movement of the piston 1126 is limited by a first adjusting screw 1135 exposed in the rod cap 1136 toward the first flow path P1 and a first washer 1123 in the piston 1126 toward the rod cap 1136, and a second adjusting screw 1138 exposed in the head cap 1139 toward the second flow path P2 and a second washer 1129 in the piston 1126 toward the head cap 1139.

[0122] like Figure 16 and Figure 18 As shown, when the second excavating device 1210 has multi-joint connecting rods 1175 located on both sides of the lower arm 1103 and connected to the shaft of the lower arm 1103, in Figure 16 and Figure 18 In the process, as the aforementioned rod 1115 is coupled with the multi-joint connecting rod 1175, in Figure 21 In the middle, the lower arm 1103 protrudes to a minimum from the rod cap 1136 around its periphery, and together with the multi-joint link 1175, moves away from the central axis X3 of the upper arm 1108, or in Figure 20 In the middle, as it is exposed to its maximum extent from the rod cover 1136, it approaches the central axis X3 of the upper arm 1108 together with the multi-joint link 1175.

[0123] like Figure 21 As shown, when the aforementioned rod 1115 is minimally exposed from the rod cap 1136, in Figure 16 and Figure 21 In the process, for the aforementioned rod 1115, rod cap 1136, pipe 1133, and head cap 1139, the rod 1115 is separated from the upper arm 1108 by the central axis X3 and gradually moved away in the order of rod 1115, rod cap 1136, pipe 1133, and head cap 1139.

[0124] like Figure 20 As shown, when the aforementioned rod 1115 is exposed to its maximum extent from the rod cap 1136, consider Figure 20 and Figure 22 For the aforementioned rod 1115, rod cap 1136, pipe 1133, and head cap 1139, the rod 1115 is set on the central axis X3 of the upper arm 1108 and gradually moved away in the order of rod 1115, rod cap 1136, pipe 1133, and head cap 1139.

[0125] Therefore, as Figure 21 As shown, when the aforementioned rod 1115 is minimally exposed from the rod cover 1136, the aforementioned rod 1115 moves from the rod cover 1136 toward the head cover 1139 in one direction M2. Figure 20 As shown, when the rod 1115 is exposed to its maximum extent from the rod cover 1136, the rod 1115 moves from the head cover 1139 toward the rod cover 1136 in another direction M1.

[0126] like Figure 18 As shown, when the lower arm 1103 has brackets 1141 on both sides of the pipe 1133, in Figures 18 to 21 In the above-mentioned hanging rod 1149, there are: a support part 1143 having a cylindrical protrusion 1142 that surrounds the pipe 1133 and extends toward the bracket B; and a locking part 1146 that surrounds the protrusion 1142 in a curved manner on the bracket B and is screwed together with the bracket 1141.

[0127] like Figure 21 As shown, when the aforementioned rod 1115 is minimally exposed from the rod cap 1136, in Figure 16 and Figure 18 In this device, the second excavating device 1210 has a multi-jointed connecting rod 1175 that is rotatably connected to the bucket 1095, the lower arm 1103, and the bucket cylinder 1150. Figure 16 In this configuration, the aforementioned multi-joint link 1175 is connected to the lower arm 1103 shaft next to the central axis X3 of the upper arm 1108.

[0128] Furthermore, in Figure 16In this configuration, the aforementioned multi-joint link 1175 is coupled to the bucket 1095 axis in such a way that the distance from the central axis X3 of the upper arm 1108 to the lower arm 1103 is less than the distance from the central axis X3 of the upper arm 1108 to the bucket 1095, and is coupled to the rod 1115 axis of the bucket cylinder 1160 in such a way that the distance from the central axis X3 of the upper arm 1108 to the bucket 1095 is less than the distance from the central axis X of the upper arm 1108 to the bucket cylinder 1160.

[0129] In contrast, consider Figure 20 and Figure 22 When the aforementioned rod 1115 is exposed to its maximum extent from the rod cap 1136, in Figure 16 and Figure 18 In the above-mentioned second excavating device 1210, there is a multi-joint connecting rod 1175 that is rotatably connected to the bucket 1095, the lower arm 1103, and the bucket cylinder 1160.

[0130] consider Figure 22 The aforementioned multi-joint link 1175 is located to the left and right of the central axis X3 of the upper arm 1108 and is connected to the lower arm 1103 and the rod 1115 axis. The aforementioned multi-joint link 1175 is connected to the bucket 1095 axis in such a way that the distance from the central axis X3 of the upper arm 1108 to the lower arm 1103 is less than the distance from the central axis X3 of the upper arm 1108 to the bucket 1095.

[0131] exist Figure 16 and Figure 17 In the above-mentioned rotating boom 1189, there are a lower rotating frame 1183 and an upper rotating frame 1186 stacked sequentially between the lower arm 1103 and the upper arm 1108, and the lower rotating frame 1183 and the upper rotating frame 1186 are respectively fixed to the lower arm 1103 and the upper arm 1108.

[0132] Furthermore, in Figure 16 and Figure 17 In this configuration, the aforementioned rotating boom 1189 causes the lower rotating frame 1183 to rotate relative to the upper rotating frame 1186, and has a central joint 1102 that, together with the lower boom 1103, passes through the lower rotating frame 1183 and the upper rotating frame 1186. Figure 16 and Figure 17 In this configuration, the aforementioned center connector 1102 is located on the central axis X3 of the upper arm 1108.

[0133] exist Figure 16 and Figure 17 In the above-mentioned upper arm 1108, a sliding part (slip) inlet / outlet hole 1104, a movable bracket engagement hole 1105, and an arm cylinder engagement hole 1106 are provided on the lower, middle, and upper sides of the upper arm 1108. Figure 16and Figure 17 In the case where the lower arm 1103 and the rotating arm 1189 have a center joint 1102 on the central axis X3 of the upper arm 1108, the sliding part inlet / outlet 1104 of the upper arm 1108 exposes the center joint 1102 to the outside on the central axis X3 of the upper arm 1108 to guide the sliding part (not shown) to engage with the center joint 1102 or to guide the sliding part to separate from the center joint 1102.

[0134] The aforementioned center connector 1102 is connected to the hydraulic pipe and does not rotate when the rotating boom 1189 rotates. The aforementioned sliding part, which has an electrical wire, does not rotate when the center connector 1102 rotates. That is, when the center connector 1102 rotates, the aforementioned sliding part prevents the electrical wire from becoming tangled. The aforementioned upper arm 1108 has a plug 1107 to minimize the inflow of external foreign objects through the sliding part inlet / outlet 1104.

[0135] like Figure 16 and Figure 17 As shown, when the upper arm 1108 has a sliding part inlet / outlet hole 1104, a movable bracket engagement hole 1105, and an arm cylinder engagement hole 1106 on its lower, middle, and upper sides, in Figure 16 and Figure 17 In the above-mentioned upper arm 1198, the sliding part inlet and outlet hole 1104 is located on the central axis X3 of the upper arm 1108 and is located on the same horizontal plane as the movable bracket connecting hole 1105 in the direction perpendicular to the central axis X3 of the upper arm 1108.

[0136] like Figure 16 and Figure 17 As shown, when the upper arm 1108 has a sliding part inlet / outlet hole 1104, a movable bracket engagement hole 1105, and an arm cylinder engagement hole 1106 on its lower, middle, and upper sides, in Figure 16 and Figure 17 In the above-mentioned upper arm 1108, the sliding part inlet / outlet hole 1104 and the arm cylinder engagement hole 1106 are located on the central axis X3 of the upper arm 1108.

[0137] On the other hand, such as Figure 22 As shown, when the second excavating device 1210 has a rotating connecting rod 1225, a bucket cylinder 1160, a clamping cylinder 1234, a clamp 1238, and a multi-joint connecting rod 1175, in Figure 22In this configuration, the bucket 1095 and the rotating link 1225 fold or unfold the multi-joint link 1175 according to the operation of the bucket cylinder 1160 and rotate around the central axis X3 of the upper arm 1108. The rotating link 1225 is connected to the bucket 1095 and the lower arm 1103. The bucket cylinder 1160 is located on one side of the lower arm 1103 and is connected to the lower arm 1103. The clamping cylinder 1234 is located on the other side of the lower arm 1103 and is connected to the lower arm 1103. The clamp 1238 is located at the end of the lower arm 1103 and is connected to the lower arm 1103. The multi-joint link 1175 is connected to the lower arm 1103, the rotating link 1225, and the bucket cylinder 1160.

[0138] Furthermore, in Figure 22 In this configuration, the clamp 1238 is engaged with the lower arm 1103 near the central axis X3 of the upper arm 1108. According to the operation of the clamping cylinder 1234, it moves relative to the lower arm 1103 and rotates up and down.

Claims

1. A digging device, characterized in that, include: The lower arm has a width that gradually increases from one end to the other end, and at the other end, a fixing hole is formed on the outer peripheral surface; A rotating boom, in the shape of a disc, is located on the other end of the lower arm and is rotatably fixed to the lower arm. The upper arm is located on and fixed to the rotating boom, and a guide hole is formed on the outer peripheral surface of the rotating boom; The center joint, surrounded by the lower arm, the rotating boom, and the upper arm, protrudes outward through the fixing hole in the lower arm and the guide hole in the upper arm; and The slip ring is inserted into or separated from the center connector through the guide hole in the upper arm. Regarding the aforementioned upper arm and the aforementioned center connector, from an external perspective, in the aforementioned guide hole of the upper arm, with the uppermost end of the aforementioned center connector as a reference, the width of the central space between the aforementioned upper arm and the aforementioned center connector is greater than the diameter of the two hydraulic pipes.

2. The excavating device according to claim 1, characterized in that, The aforementioned rotating boom includes: The lower rotating frame and the upper rotating frame are stacked sequentially on the aforementioned lower arm; and The drive motor unit causes the lower rotating frame to rotate relative to the upper rotating frame. The lower rotating frame and the upper rotating frame are respectively combined with the lower arm and the upper arm.

3. The excavating device according to claim 1, characterized in that, The lower arm has a mounting hole on a surface perpendicular to its length. When the aforementioned rotating boom has a lower rotating frame, an upper rotating frame, and a through hole passing through the central region of the lower rotating frame and the upper rotating frame in sequence, The aforementioned center connector includes: The connector cover is inserted into the placement hole of the lower arm and fixed to the lower rotating frame of the rotating arm; and The connector shaft is inserted into the connector cover and rotates relative to the connector cover, protruding through the through hole of the rotating arm toward the upper arm.

4. The excavating device according to claim 1, characterized in that, The slip rings mentioned above include: The fixing part is located outside the aforementioned center joint; The rotating part is snapped into the fixing part and located outside the center joint, and rotates relative to the fixing part. The input terminal extends from the aforementioned rotating part toward one side of the aforementioned rotating part; and The output end extends from the aforementioned rotating part toward the other side of the aforementioned rotating part.

5. The excavating device according to claim 4, characterized in that, The aforementioned center connector includes a connector housing and a connector shaft inserted into the connector housing. When the slip ring is inserted into the connector cover and the connector shaft while detached from the center connector, the output end of the slip ring is inserted into the guide hole of the upper arm and passes sequentially through the connector shaft and the connector cover to protrude into the fixing hole of the lower arm. Then, it is pulled outward from the fixing hole of the lower arm. During the pulling of the output end, the fixed part and the rotating part of the slip ring are guided to the guide hole of the upper arm and partially inserted into the connector shaft. During the period when the output end is pulled, the input end of the slip ring, together with the fixed part and the rotating part, is guided to the guide hole of the upper arm, and extends outward from the rotating part through the guide hole of the upper arm.

6. The excavating device according to claim 4, characterized in that, The aforementioned center connector includes a connector housing and a connector shaft inserted into the connector housing. When the slip ring is separated from the connector cover and the connector shaft while engaged with the center connector, the input end of the slip ring is pulled outward from the guide hole of the upper arm. During the pulling of the aforementioned input end, the aforementioned fixed portion and the aforementioned rotating portion of the aforementioned slip ring separate from the aforementioned connector shaft and are guided to the aforementioned exterior through the aforementioned guide hole of the aforementioned upper arm. During the period when the input end is pulled, the output end of the slip ring passes through the connector cover and the connector shaft in sequence and is separated from the connector shaft.

7. The excavating device according to claim 1, characterized in that, The guide hole in the upper arm also includes a cover plate. The aforementioned upper arm includes: A circular peripheral portion is formed in the guide hole of the upper arm on the central connector; and Multiple connecting rings are provided around the aforementioned circular area. The aforementioned cover includes a mating hole and a screw component aligned with the mating ring around the aforementioned circular periphery. A screw component is inserted into the aforementioned connecting hole and the aforementioned connecting ring around the aforementioned circular portion of the aforementioned cover to engage with the aforementioned upper arm screw.

8. The excavating device according to claim 1, characterized in that, The guide hole in the upper arm also includes a cover plate. The aforementioned upper arm includes: A circular peripheral portion is formed in the guide hole of the upper arm on the central connector; and Multiple slots are provided around the aforementioned circular area. The aforementioned cover includes a snap-in protrusion aligned with the snap-in groove on the aforementioned circular periphery. The snap-in protrusion of the cover is inserted into the snap-in groove around the circular part and snaps into the upper arm.

9. The excavating device according to claim 1, characterized in that, The guide hole in the upper arm also includes a cover plate. The aforementioned upper arm includes: A circular peripheral portion is formed in the guide hole of the upper arm on the central connector; and Two auxiliary hinges are formed around the aforementioned circular portion. The aforementioned cover includes a main hinge and a hinge pin aligned with the two auxiliary hinges around the aforementioned circular periphery. The hinge pins are inserted into the auxiliary hinges around the circular portion and the main hinge of the cover to hinge them to the upper arm.

10. The excavating device according to claim 1, characterized in that, The guide hole in the upper arm also includes a cover plate. The aforementioned upper arm includes: A circular periphery is formed in the guide hole of the upper arm on the central connector; Two auxiliary hinges are located in the central region of the aforementioned circular periphery; and Two magnets are located at the two edges of the aforementioned circular portion. The aforementioned cover includes a main hinge and a hinge pin aligned with the two auxiliary hinges around the aforementioned circular periphery. The hinge pins are inserted into the auxiliary hinges of the circular periphery and the main hinge of the cover to engage the hinges with the upper arm and be attracted by the magnetic force of the magnets of the circular periphery.

11. The excavating device according to claim 1, characterized in that, When the upper arm has a circular periphery located on the center joint in a guide hole on one side of the upper arm and an angular periphery located on the center joint in a guide hole on the other side of the upper arm, the guide hole of the circular periphery forms a larger opening in the upper arm, with the uppermost end of the center joint as a reference, compared with the guide hole of the angular periphery.

12. The excavating device according to claim 1, characterized in that, When the upper arm has a circular periphery located on the center joint in a guide hole on one side of the upper arm and an angular periphery located on the center joint in a guide hole on the other side of the upper arm, with the uppermost end of the center joint as a reference, the circular periphery is more recessed in the upper arm than the angular periphery, and the resulting curvature is equal to the curvature of the ceiling facing the center joint.

13. The excavating device according to claim 1, characterized in that, Also includes: The bucket cylinder and clamping cylinder are located on one side and the other side of the lower arm, respectively, and are rotatably fixed to the other end of the lower arm. A connecting rod structure is located at one end of the lower arm and is rotatably fixed to the lower arm and the bucket cylinder. An inclined connecting rod is located below the aforementioned connecting rod structure and is rotatably fixed to the aforementioned connecting rod structure; The bucket is rotatably fixed to the aforementioned tilting link below it; and The clamp is located at one end of the lower arm and is rotatably fixed to the lower arm and the clamping cylinder.

14. An excavating device comprising a bucket, a lower boom, a rotating boom, an upper boom, and a movable support arranged sequentially and rotatably relative to each other at the work site and facing the cab, and including a bucket cylinder and a boom cylinder respectively located around the lower boom and the movable support and rotatably coupled to the bucket and the upper boom, characterized in that, When the aforementioned upper arm includes the movable support engagement hole and the arm cylinder engagement hole located sequentially on the aforementioned rotating boom, The lower arm passes perpendicularly through the arm cylinder engagement hole of the upper arm and is located on the central axis of the upper arm, which overlaps more than half the length of the lower arm. The upper arm is located directly above the rotating boom, causing the movable support engagement hole to protrude more towards the side of the upper arm than the rotating boom itself. The aforementioned bucket cylinder is rotatably mounted on the lower arm via its two sides. The aforementioned rotating boom has a lower rotating frame and an upper rotating frame stacked sequentially between the lower boom and the upper boom. The lower rotating frame and the upper rotating frame are respectively fixed to the lower arm and the upper arm. The lower rotating frame is rotated relative to the upper rotating frame. It has a central joint that passes through the lower rotating frame and the upper rotating frame together with the lower arm. The aforementioned center joint is located on the aforementioned center axis of the aforementioned upper arm.

15. The excavating device according to claim 14, characterized in that, When there is a multi-joint connecting rod between the bucket, the lower arm, and the bucket cylinder, the lower arm is sequentially connected to the bucket and the multi-joint connecting rod shaft along the length of the lower arm next to the central axis of the upper arm.

16. The excavating device according to claim 14, characterized in that, The aforementioned bucket cylinder includes a rod, a piston, and a cylinder. The aforementioned cylinders include: The head cover is located directly below the aforementioned rotating boom; The pipes are connected to the aforementioned head cover; A rod cap, which is joined to the aforementioned pipe on the opposite side of the aforementioned head cap; and The hanging rod allows the aforementioned pipe to rotate and connect to the aforementioned lower arm. The aforementioned rod is located inside and outside the aforementioned pipe, surrounded by the aforementioned rod cover, and moves relative to the aforementioned cylinder. The piston is located inside the pipe and moves together with the rod.

17. The excavating device according to claim 16, characterized in that, When a multi-joint link is located on both sides of the lower arm and is coupled to the lower arm axis, the link and the multi-joint link move away from the central axis of the upper arm together as the link is coupled to the multi-joint link axis and protrudes from the rod cover to the minimum extent around the lower arm, or the link and the multi-joint link move closer to the central axis of the upper arm together as the link is protruded to the maximum extent from the rod cover.

18. The excavating device according to claim 16, characterized in that, When the rod is exposed to the minimum extent from the rod cover, the rod, the rod cover, the pipe, and the head cover are separated from the central axis of the upper arm and gradually moved away in the order of rod, rod cover, pipe, and head cover.

19. The excavating device according to claim 16, characterized in that, When the rod is exposed to its maximum extent from the rod cover, the rod, the rod cover, the pipe, and the head cover are positioned on the central axis of the upper arm and gradually moved away from each other in the order of rod, rod cover, pipe, and head cover.

20. The excavating device according to claim 16, characterized in that, When the lower arm has brackets on both sides of the pipe, the hanging rod includes: The support portion has a cylindrical protrusion surrounding the aforementioned pipe and extending toward the aforementioned bracket; and The locking part, together with the bracket, curves around the protruding piece and is screwed into the bracket.

21. The excavating device according to claim 16, characterized in that, It has a multi-jointed linkage that is rotatably connected to the bucket, the lower arm, and the bucket cylinder when the aforementioned rod is minimally exposed from the aforementioned rod cover. The aforementioned multi-joint link is connected to the aforementioned lower arm axis next to the aforementioned central axis of the upper arm. The aforementioned multi-joint linkage is coupled to the bucket shaft in such a manner that the distance from the central axis of the upper arm to the lower arm is less than the distance from the central axis of the upper arm to the bucket. The aforementioned multi-joint linkage is coupled to the aforementioned rod shaft of the bucket cylinder in such a manner that the distance from the aforementioned central axis of the upper arm to the aforementioned bucket is less than the distance from the aforementioned central axis of the upper arm to the aforementioned bucket cylinder.

22. The excavating device according to claim 16, characterized in that, It has a multi-jointed linkage that is rotatably connected to the bucket, the lower arm, and the bucket cylinder when the rod is exposed to its maximum extent from the rod cover. The aforementioned multi-joint link is located to the left and right of the aforementioned central axis of the upper arm, and is connected to the aforementioned lower arm and the aforementioned rod axis. The aforementioned multi-joint linkage is coupled to the bucket shaft in such a manner that the distance from the central axis of the upper arm to the lower arm is less than the distance from the central axis of the upper arm to the bucket.

23. The excavating device according to claim 14, characterized in that, The aforementioned upper arm has a sliding part inlet / outlet hole, a movable bracket engagement hole, and an arm cylinder engagement hole on its lower, middle, and upper sides. When the lower arm and the rotating arm have a center joint on the central axis of the upper arm, the sliding part inlet / outlet of the upper arm exposes the center joint to the outside on the central axis of the upper arm and guides the sliding part to engage with the center joint or to separate from the center joint.

24. The excavating device according to claim 14, characterized in that, When the upper arm has a sliding part inlet / outlet hole, a movable bracket coupling hole, and an arm cylinder coupling hole on its lower, middle, and upper sides, the sliding part inlet / outlet hole of the upper arm is located on the central axis of the upper arm and is located on the same horizontal plane as the movable bracket coupling hole in a direction perpendicular to the central axis of the upper arm.

25. The excavating device according to claim 14, characterized in that, When the upper arm has a sliding part inlet / outlet hole, a movable bracket connecting hole, and an arm cylinder connecting hole on its lower, middle, and upper sides, the sliding part inlet / outlet hole and the arm cylinder connecting hole of the upper arm are located on the central axis of the upper arm.

26. The excavating device according to claim 14, characterized in that, When the device includes a rotating link, the aforementioned bucket cylinder, clamping cylinder, clamp, and multi-joint link, the bucket and the aforementioned rotating link fold or unfold the aforementioned multi-joint link according to the operation of the aforementioned bucket cylinder and rotate around the aforementioned central axis of the aforementioned upper arm. The aforementioned clamp is engaged with the aforementioned lower arm axis near the aforementioned central axis of the aforementioned upper arm. According to the operation of the aforementioned clamping cylinder, it moves relative to the aforementioned lower arm and rotates up and down. The aforementioned rotating link is engaged with the aforementioned bucket and the aforementioned lower arm. The aforementioned bucket cylinder is located on one side of the aforementioned lower arm and is engaged with the aforementioned lower arm. The aforementioned clamping cylinder is located on the other side of the aforementioned lower arm and is engaged with the aforementioned lower arm. The aforementioned clamp is located at the end of the aforementioned lower arm and is engaged with the aforementioned lower arm. The aforementioned multi-joint link is engaged with the aforementioned lower arm, the aforementioned rotating link, and the aforementioned bucket cylinder.

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