Attachment / detachment mechanism and working machine equipped with the attachment / detachment mechanism

Abstract

To provide an attachment and detachment mechanism that simplifies and reduces a weight of a structure related to attachment and detachment, and a work machine including the attachment and detachment mechanism.SOLUTION: An attachment and detachment mechanism 6 is for attaching and detaching a body part (a) including a mounting part 60 in a distal end part to and from a work part 51 including an engagement part 65 connected to the mounting part 60. The mounting part 60 includes a ridge line protruding in the engagement part 65 direction. An end surface of the mounting part 60 includes a peaked part 604 having a triangle mountain shape connected to the ridge line. The engagement part 65 includes an abutting surface 653 with which the ridge line of the peaked part 604 can abut.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an attachment / detachment mechanism and a work machine equipped with the attachment / detachment mechanism. [Background technology]

[0002] In the case of a work machine, etc., when a working unit is attached to the tip of an extendable arm member to enable work to be performed in a location away from the worker and the aircraft on which the worker is riding, work efficiency can be improved by preparing multiple working units suited to the type of work and working by replacing only each working unit. As a mechanism for attaching and detaching a working unit, the mechanisms described in Patent Documents 1 and 2 are known. In these conventional examples, the main body including the arm member remains the same, and only the working section needs to be replaced, so that work can be carried out efficiently.

[0003] The attachment / detachment mechanism described in Patent Document 1 is a mechanism for attaching and detaching a second connecting pin between a gripping claw that is rotated by a hydraulic cylinder and a second recess, and for engaging a first connecting pin with the first recess. In the attachment / detachment structure described in Patent Document 2, the attachment member at the tip of the arm member has a flat plate portion, and the bracket on the back of the bucket, which is the working part, has a base plate along which the flat surface of the flat plate portion fits. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-171696 A [Patent Document 2] JP 2000-104276 A Summary of the Invention [Problem to be solved by the invention]

[0005] It is not common to think of agricultural implements that are specifically designed for agricultural tractors. The weight and dimensions of agricultural tractors vary widely depending on the manufacturer and specifications. Therefore, agricultural implements that are attached to agricultural tractors need to be able to work safely even if the ground load of the tractor, which is the weight distribution with the tractor, is poor. For this reason, it is necessary to make the overall weight of the agricultural implements light.

[0006] In the case of agricultural implements that work far away from the agricultural tractor, if the working part located at the end of the extendable arm is lighter, the ground load of the tractor to which the implement is attached can be kept appropriate, even if the end of the extendable arm is positioned far away, allowing work to be performed safely. If the mechanism of Patent Document 1 is adopted for this type of agricultural machine, a hydraulic cylinder and a component driven by this are required at the tip of the arm, which increases not only the overall weight of the agricultural machine but also the weight of the tip of the arm component, resulting in a problem of worsening the ground load of the tractor.

[0007] The attachment / detachment structure described in Patent Document 2 has a simple configuration, but has a problem that attachment / detachment cannot be performed smoothly if a foreign object gets caught in the flat surface that is the contact surface. For this reason, the flat surface needs to be kept clean, which is a burden for the worker. In addition, although the attachment stability improves when the flat surface area is made larger, it may be difficult to make this flat surface large depending on the shape of the work part to be attached and detached.

[0008] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide an attachment / detachment mechanism that simplifies the structure relating to attachment / detachment and can reduce weight, and a working machine having the same attachment / detachment mechanism. [Means for solving the problem]

[0009] The present invention relates to A detachment mechanism for attaching and detaching a working unit having an attachment part at a tip end and an engagement part connected to the attachment part to the main body part, The mounting portion has a ridge line pointed toward the engagement portion, and an end face of the mounting portion has a triangular mountain-like portion connected to the ridge line, The engaging portion has an abutment surface with which the ridge line of the peak portion can abut; Equipped with 、 The mounting portion has a recessed groove that opens in a semicircular shape on a side of the mounting portion, a boss portion disposed parallel to a central axis of the recessed groove and into which a connecting shaft for connecting to the working portion is inserted; a ridge-like portion disposed in the vicinity of the recessed groove and the boss portion, the ridge-like portion having a ridge line in a direction intersecting a central axis of the recessed groove and a central axis of the boss portion, the ridge-like portion being disposed across the recessed groove and the boss portion, The engagement portion includes an engagement pin that is engageable with the recessed groove; a hole into which the connecting shaft can be inserted together with the boss portion to fix the engaging portion and the mounting portion; A detachment mechanism comprising: relates to.

[0010] The present invention further comprises: The installation procedure for the mounting part is as follows: (1) The opening of the recessed groove is directed downward and lowered toward the engagement portion. (2) Insert the engagement pin of the engagement part into the recessed groove, (3) Rotate the mounting part using the recessed groove and the engagement pin as a fulcrum. (4) Bringing the ridge-like portion into contact with the contact surface; (5) Align the hole with the boss, pass the connecting shaft through, and secure the connecting shaft to the mounting part and the engagement part to complete the installation. A detachment mechanism, relates to.

[0011] The present invention further comprises: The engagement portion includes a connection plate for mounting the engagement pin and the boss portion; The connecting plate is Mounting part an opening having a slope for inserting the A detachment mechanism further comprising: relates to.

[0012] The present invention further comprises: The mounting portion has a rotation portion that is rotatable relative to the main body portion. A detachment mechanism further comprising: relates to.

[0013] The present invention relates to A detachment mechanism for attaching and detaching a working unit having an attachment part at a tip end and an engagement part connected to the attachment part to the main body part, The mounting portion has a ridge line pointed toward the engagement portion, and an end face of the mounting portion has a triangular mountain-like portion connected to the ridge line, The engaging portion has an abutment surface with which the ridge line of the peak portion can abut; A detachable mechanism having The main body portion has an attachment portion that can be attached to a traveling machine body, Equipped with The working unit is capable of ground work. and The mounting portion has a recessed groove that opens in a semicircular shape on a side of the mounting portion, a boss portion disposed parallel to a central axis of the recessed groove and into which a connecting shaft for connecting to the working portion is inserted; a ridge-like portion disposed in the vicinity of the recessed groove and the boss portion, the ridge-like portion having a ridge line in a direction intersecting a central axis of the recessed groove and a central axis of the boss portion, the ridge-like portion being disposed across the recessed groove and the boss portion, The engagement portion includes an engagement pin that is engageable with the recessed groove; a hole into which the connecting shaft can be inserted together with the boss portion to fix the engaging portion and the mounting portion; Detachable mechanism with A working machine comprising: relates to.

[0014] The present invention further comprises: The installation procedure for the mounting part is as follows: (1) The opening of the recessed groove is directed downward and lowered toward the engagement portion. (2) Insert the engagement pin of the engagement part into the recessed groove, (3) Rotate the mounting part using the recessed groove and the engagement pin as a fulcrum. (4) Bringing the ridge-like portion into contact with the contact surface; (5) Align the hole with the boss, pass the connecting shaft through, and secure the connecting shaft to the mounting part and the engagement part to complete the installation. A detachment mechanism, relates to.

[0015] The present invention further comprises: The engagement portion includes a connection plate for mounting the engagement pin and the boss portion; The connection plate is Mounting part an opening having a slope for inserting the A working machine further comprising: relates to.

[0016] The present invention further comprises: The mounting portion has a rotation portion that is rotatable relative to the main body portion. A working machine further comprising: relates to.

[0017] The present invention further comprises: a main frame to which the mounting portion is fixed; An extension means for connecting the main frame and the attachment / detachment mechanism; A working machine further comprising: relates to. Effect of the Invention

[0018] The present invention provides an attachment / detachment mechanism that simplifies the structure relating to attachment / detachment and can reduce the weight, and a work machine having the attachment / detachment mechanism. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a plan view of a working portion of the attachment / detachment mechanism according to the embodiment of the present invention. [Diagram 2] 4 is a partially enlarged left side view of a working portion of the attachment / detachment mechanism according to the embodiment of the present invention. FIG. [Diagram 3] 4 is a partially enlarged front view of a working portion of the attachment / detachment mechanism according to the embodiment of the present invention. FIG. [Figure 4] 4 is a partially enlarged left end view of a working portion of the attachment / detachment mechanism according to the embodiment of the present invention. FIG. [Diagram 5] 1 is a partially enlarged end view of a right side of a working portion of the attachment / detachment mechanism according to an embodiment of the present invention. FIG. [Figure 6] 1A to 1C are partially enlarged front views of a mounting portion of the mounting / detaching mechanism according to an embodiment of the present invention, illustrating a procedure for attaching and detaching the mounting portion. [Figure 7] 1A to 1C are partially enlarged front views of a mounting portion of the mounting / detaching mechanism according to an embodiment of the present invention, illustrating a procedure for attaching and detaching the mounting portion. [Figure 8] 1A to 1C are partially enlarged front views of a mounting portion of the mounting / detaching mechanism according to an embodiment of the present invention, illustrating a procedure for attaching and detaching the mounting portion. [Figure 9] 1A to 1C are partially enlarged front views of a mounting portion of the mounting / detaching mechanism according to an embodiment of the present invention, illustrating a procedure for attaching and detaching the mounting portion. [Figure 10]1 is a diagram showing a working unit deployed state of a working machine related to an attachment / detachment mechanism of an embodiment of the present invention, when viewed from the rear in the traveling direction when the working unit is in the deployed state. FIG. [Figure 11] 1 is a plan view of a working unit of a working machine having an attachment / detachment mechanism according to an embodiment of the present invention in a deployed state and in a normal state, with the upward direction in the drawing being the traveling direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] 10 and 11, A is a working machine. In this embodiment of the present invention, the working machine A relates to a working machine for performing work such as mowing. The working machine A is attached to mounting parts 111, 112 for mounting on a traveling machine body B such as a tractor and is driven. In this embodiment, the traveling machine body B, which is a tractor or the like, is located behind the working machine A shown in FIG.

[0021] Reference numeral 11 shown in Figures 10 and 11 denotes a main frame. The main frame 11 is attached to the work machine A. As shown in the figures, the main frame 11 is provided with mounting parts 111, 112 for mounting to the traveling body B. The two parts 111 are mounting parts (lower) provided at the bottom, and 112 is a mounting part (top) provided at the top, and the work machine A is mounted to the traveling body B at three points.

[0022] An operating unit (not shown) is provided on the traveling body B and operates a directional control valve 25, which will be described later. 10 and 11 denotes an input shaft 22. The input shaft 22 takes in driving force from the traveling machine body B to which the input shaft 22 is attached to the working machine A. 10 and 11 denotes a transmission unit 23. In the transmission unit 23, the driving force input from the traveling body B via the input shaft 22 is changed in speed.

[0023] 10 and 11, reference numeral 24 denotes a hydraulic pump which is a fluid pressure generating source. The hydraulic pump 24 is driven by driving force input from the traveling machine body B via the input shaft 22 and changed in speed by a transmission 23. The hydraulic pump 24 delivers hydraulic pressure to hydraulic equipment related to the work machine A which operates with the hydraulic pressure. 10 and 11, a valve unit 25 is a directional control valve. The valve unit 25 controls the switching of the flow of hydraulic pressure.

[0024] 10 and 11, a mast frame 21 is provided with a mast frame pivot shaft 211. The mast frame 21 is attached to the main frame 11 by the mast frame pivot shaft 211 so as to be freely rotatable. The mast frame 21 is provided at one end or at the center of the main frame 11 of the work machine A relative to the left or right in the traveling direction. The mast frame 21 is capable of rotating the telescopic means 41 in the horizontal direction. The mast frame 21 is capable of rotating the telescopic means 41 around a mast frame rotating shaft 211, which is a vertical axis. In this embodiment, the mast frame 21, which rotates about one end as a fulcrum, is in a normal position and normal state when the other end of the mast frame 21 is positioned in a direction perpendicular to the traveling direction, and in a retracted position and retracted state when the other end of the mast frame 21 is rotated rearward from the normal position.

[0025] A horizontally rotating cylinder (a mast frame rotating shaft cylinder) 212 is a hydraulic cylinder that extends and contracts by hydraulic pressure. One end of the horizontally rotating cylinder 212 is attached to the main frame 11, and the other end is attached to the mast frame 21. Therefore, the horizontally rotating cylinder 212 extends and retracts by stroke movement, thereby rotating the mast frame 21 relative to the main frame 11.

[0026] Reference numeral 31 denotes a tank. In this embodiment, the tank 31 is an oil tank. In this embodiment, the tank 31 is provided at the other end of the main frame 11 relative to the left and right in the traveling direction of the work machine A. Since each cylinder used in the work machine A is a hydraulic cylinder, the tank 31 stores oil for driving each oil cylinder. The front end of the tank 31 is located approximately at the same position as the front end of the main frame 11 or slightly rearward of the front end of the main frame 11.

[0027] Reference numeral 41 denotes an extension / contraction means. One end of the extension / contraction means 41 is connected to the rotatable mast frame 21 near the main frame 11. The extension / contraction means 41 allows the working unit 51 to assume a stored state in which the extension / contraction means 41 is folded and positioned on the main frame 11, and a working state in which the working unit 51 is positioned to the side of the main frame 11 in the traveling direction, as shown in Figs. 10 and 11, by extending the extension / contraction means 41. That is, the extension / contraction means 41 can be changed between a stored state in which it is folded near the main frame 11 and an extended state in which it is extended to the side of the main frame 11. In the description, the extended state may be called a deployed state. The telescopic means 41 has a first boom 411, a first connector 412, a second boom 413, a second connector 414, a first cylinder 415, a second cylinder 416, a third cylinder 417, and a fourth cylinder 418.

[0028] The first boom 411 has one end connected to the mast frame 21 and is provided so as to be rotatable in the vertical direction. The first connector 412 has one end connected to the tip of the other end of the first boom 411 and is provided so as to be rotatable in the vertical direction. The second boom 413 has one end connected to the tip portion on the other end side of the first connector 412, and is provided so as to be rotatable in the forward and backward directions relative to the traveling direction when the mast frame 21 is in the normal position. The second connector 414 has one end provided at the tip portion on the other end side of the second boom 413, and is movable in parallel in the front-rear direction relative to the first connector 412 when the mast frame 21 is in the normal position.

[0029] The first cylinder 415 is made of a hydraulic cylinder, and connects the mast frame 21 and the first boom 411 via a link mechanism 42 that connects the mast frame 21 and the first boom 411. The first cylinder 415 is for rotating the first boom 411 and is provided on the first boom 411. When the first cylinder 415 extends or retracts, it simultaneously rotates together with the first boom 411, causing the first boom 411 to rotate up and down. The first cylinder 415 drives the telescopic means 41 to rotate about a first boom rotating shaft 411A, which is a horizontal shaft provided on the mast frame 21. The first boom 411 is connected to the mast frame 21 so as to be rotatable in the vertical direction about a first boom rotation shaft 411A as a rotation center.

[0030] The second cylinder 416 is made of a hydraulic cylinder, and connects the first boom 411 to the other end side of the first connector 412. The second cylinder 416 is for rotating the first connector 412 up and down. The third cylinder 417 is a front-rear rotating cylinder, made of a hydraulic cylinder, and connects the first connector 412 and the second boom 413. The third cylinder 417 is for rotating the second boom 413 forward and backward relative to the first boom 411. The third cylinder (front-rear rotating cylinder) 417 rotates the extension and contraction means 41 in the front-rear direction by extending and contracting the stroke when the mast frame 21 is in the normal position.

[0031] The fourth cylinder 418 is made of a hydraulic cylinder, and connects the second connector 414 and the working unit 51. The fourth cylinder 418 is for rotating the working unit 51 up and down.

[0032] A working unit 51 is capable of performing ground work. The working unit 51 is provided at the tip of the other end of the second connecting body 414 and on the front side with respect to the traveling direction of the second connecting body 414. The working unit 51 is further provided so as to be rotatable in the vertical direction relative to the second connecting body 414 . In this embodiment, when the mast frame 21 is in the normal position, the working unit 51 has multiple blades arranged on a rotation shaft 512 that faces in a direction perpendicular to the traveling direction, and performs work such as mowing by rotating the multiple blades. However, the purpose of the work and the structure of the working unit 51 are not limited to the disclosed embodiment.

[0033] The working unit 51 can assume an unfolded posture shown in Figures 10 and 11, or a stored posture in which the first boom 411 and the second boom 413 are folded up in an approximately horizontal position, and the first boom 411 and the first connector 412, and the second boom 413 and the second connector 414 are positioned above the tank 31.

[0034] The attachment / detachment mechanism 6 and the mounting portion 60 will be described. The reference symbol a in Figs. 10 and 11 denotes a main body part. The main body part a includes an attachment / detachment mechanism 6 and a working unit 51. The attachment / detachment mechanism 6 is provided at the tip of the main body part a. The attachment / detachment mechanism 6 includes an attachment unit 60. The attachment unit 60 can be attached to the traveling machine body B via the main body part a. The attachment / detachment mechanism 6 detaches the working unit 51 from the main body part a by using the attachment unit 60.

[0035] 10 and 11 denotes an extension means 41. The extension means 41 connects the main frame 11 and the attachment / detachment mechanism 6. An attachment part 60 is fixed to the main frame 11. The mounting portion 60 has a recessed groove 601 , a boss portion 603 , a ridge line 605 , and a peak-like portion 604 .

[0036] 2 to 10, the mounting part 60 is formed by stacking two plate-like bodies, one on the front side and one on the back side, with a gap therebetween, each of which is trapezoidal as a whole when viewed from the front. The end face of the mounting part 60 is formed into a pentagon having a ridge line 605 that protrudes from the lower end of the mounting part 60 in a V-shaped downward tip shape as shown in Figs. 2, 4, and 5, by joining both plate-like bodies at the abutment surface 653 side of the engagement part 65, which is the lower end in the figures.

[0037] The gap between the two plate-like bodies of mounting part 60 narrows and the tip is tapered towards engaging part 65, which is the attachment / detachment direction, with an inclined surface extending to ridge line 605 as shown in Figures 2, 4 and 5 to form ridge-like part 604. As shown in Figures 4 and 5, the end face shape of ridge-like part 604 on both the front and back sides is a triangular mountain shape whose lower end tip connects to protruding ridge line 605. The end face of ridge-like part 604 has an end face shape that is, so to speak, like an axe. The angle of the triangle is between 60 degrees and 120 degrees, and preferably 90 degrees. These angles give the mounting part 60 excellent strength, and even if there is a foreign object on the contact surface 653 of the engagement part 65 when the main body part a and the working part 51 are connected, the foreign object can be pushed aside and avoided. The ridge portion 604 is disposed between the recessed groove 601 and the boss portion 603 .

[0038] 1 to 11, the rotating part 606 is provided on the mounting part 60 toward the second connecting body 414 at the tip of the expansion and contraction means 41. The rotating part 606 is provided rotatably with respect to the main body part a. As shown in FIGS. 6 to 9, the recessed groove 601 opens in a semicircular shape on the side of the mounting part 60 below a rotating part 606 provided on the mounting part 60 and extends over the front and back surfaces of the mounting part 60 . The boss portion 603 is provided in the form of a through hole extending from the front to the back surface of the mounting portion 60 in parallel with the central axis of the recessed groove 601 .

[0039] 62 is a connecting shaft. The connecting shaft 62 is inserted into the boss portion 603. By inserting the connecting shaft 62 into the boss portion 603, the connecting shaft 62 connects the boss portion 603 and the working portion 51. The ridge line 605 is disposed in the vicinity of the recessed groove 601 and the boss portion 603 , and extends in a direction intersecting the central axis of the recessed groove 601 and the central axis of the boss portion 603 .

[0040] Reference numeral 65 denotes an engagement portion. The engagement portion 65 includes an engagement pin 651 that can engage with the recessed groove 601, a hole portion 652 into which the connecting shaft 62 can be inserted together with a boss portion 603 to fix the engagement portion 65 and the mounting portion 60, and an abutment surface 653 against which a ridge line 605 of a peak portion 604 can abut.

[0041] The engagement portion 65 includes a connection plate 654 for attaching the engagement pin 651 and the boss portion 603, and the connection plate 654 includes an opening 655 having an inclined portion 656 for inserting the mounting portion 60 therein. The attachment / detachment mechanism 6 attaches / detaches the working unit 51 to / from the main body unit a, which has an engagement unit 65 that connects to the mounting unit 60.

[0042] The procedure for attaching and detaching (mounting) the mounting portion 60 according to the embodiment of the present invention will now be described. (1) As shown in FIG. 6, the mounting portion 60 is lowered toward the engagement portion 65 with the opening of the recessed groove 601 facing downward. (2) As shown in FIG. 7, the engagement pin 651 of the engagement portion 65 is fitted into the recessed groove 601. (3) As shown in FIG. 8, the mounting portion 60 is rotated (pivoted) around the recessed groove 601 and the engagement pin 651 as fulcrums. (4) As shown in FIG. 9, the ridges 604 rotate and come into contact with the contact surface. 9, the hole 652 and the boss 603 are aligned, and the connecting shaft 62 is passed through the hole 652 and the boss 603. The connecting shaft 62 is prevented from slipping out, and the fixing operation between the mounting part 60 and the engaging part 65 is completed. The removal procedure is the reverse of the installation procedure.

[0043] The effects of the embodiment of the present invention will now be described. Fixing of the main body portion a and the working portion 51 is completed by passing the connecting shaft 62 through the recessed groove 601 , the engaging pin 651 , the boss portion 603 and the hole portion 652 .

[0044] Since the ridge portion 604 abuts against the abutment surface 653 , the boss portion 603 and the hole portion 652 necessarily match, and the connecting shaft 62 can be easily inserted into the hole portion 652 .

[0045] As shown in FIG. 9, even when the main body part a and the working part 51 are connected and fixed, the ridge-like part 604 comes into contact at a distance from the hole part 652 to the engagement pin 651. This increases the contact area between the main body part a and the working part 51, improving the stability and unity of the main body part a and the working part 51 when fixed.

[0046] Furthermore, when the main body part a and the working part 51 are connected and fixed, the side part of the mounting part 60 comes into contact with the connecting plate 654 provided on the engagement part 65 over as wide an area as possible, thereby further improving the stability (integrity) of the main body part a and the working part 51.

[0047] When fixing, the worker only needs to insert the connecting shaft 62 into the boss portion 603 and the hole portion 652, which naturally match, so there is no need to perform adjustment work such as aligning holes during the connecting work. Therefore, efficient attachment and detachment work is possible.

[0048] 2, 4 and 5, the end faces of the front and back sides of the ridge-like portion 604 are triangular with a protruding lower end tip, so that the ridge-like portion 604 can push aside any foreign matter that may be present on the abutment surface 653 of the engagement portion 65 when the main body portion a and the working unit 51 are connected. Therefore, the contact area between the ridge-like portion 604 and the abutment surface 653 can be kept clean. The ridge tip of the ridge-like portion 604 may have a negligibly small contact surface with the abutment surface 653, or may have a flat surface or an arcuate portion formed during machining.

[0049] The inclined surface of the ridge-like portion 604 can act as a guide when the mounting portion 60 is inserted downward from the top of the engagement portion 65. Therefore, even if the mounting portion 60 and the engagement portion 65 or the positions or orientations of the mounting portion 60 and the engagement portion 65 are misaligned, they can be engaged while correcting the misalignment by following the inclined surface.

[0050] By providing the inclined portion 656 at the opening of the connecting plate 654, it is possible to obtain the same effect as the inclined surface of the ridge portion 604. In the embodiment, the inclined portion 656 is provided on the connecting plate 654 on the front side in the traveling direction, but the inclined portion 656 may also be provided on the connecting plate 654 on the rear side.

[0051] 4 and 5, the end face of the ridge-like portion 604 is formed in a triangular mountain shape with the lower end tip on the abutment surface 653 side protruding, so that even if there is a foreign object on the abutment surface 653 of the engagement part 65 when the main body part a and the working part 51 are connected, the foreign object can be pushed aside and avoided. Therefore, the contact area between the ridge-like portion 604 and the abutment surface 653 can be kept clean. The rotating portion allows easy alignment of the recessed groove 601 and the boss portion 603 with the engaging pin 651 and the hole portion 652, making attachment and detachment operations more efficient.

[0052] Appendix 1 A detachment mechanism for attaching and detaching a working unit having an attachment part at a tip end and an engagement part connected to the attachment part to the main body part, The mounting portion has a ridge line pointed toward the engagement portion, and an end face of the mounting portion has a triangular mountain-like portion connected to the ridge line, The engaging portion has an abutment surface with which the ridge line of the peak portion can abut; A detachment mechanism comprising:

[0053] Appendix 2 The mounting portion has a recessed groove that opens in a semicircular shape on a side of the mounting portion, a boss portion disposed parallel to a central axis of the recessed groove and into which a connecting shaft for connecting to the working portion is inserted; a ridge-like portion disposed in the vicinity of the recessed groove and the boss portion, the ridge-like portion having a ridge line in a direction intersecting a central axis of the recessed groove and a central axis of the boss portion, and disposed across the recessed groove and the boss portion; Equipped with The engagement portion includes an engagement pin that is engageable with the recessed groove; a hole into which the connecting shaft can be inserted together with the boss portion to fix the engaging portion and the mounting portion; The attachment / detachment mechanism according to claim 1, further comprising:

[0054] Appendix 3 The engagement portion includes a connection plate for mounting the engagement pin and the boss portion; the connecting plate has an opening having a sloped portion into which the engaging portion is inserted; 3. The attachment / detachment mechanism according to claim 1, further comprising:

[0055] Appendix 4 The mounting portion has a rotation portion that is rotatable relative to the main body portion. 4. The attachment / detachment mechanism according to claim 1, further comprising:

[0056] Appendix 5 A detachment mechanism for attaching and detaching a working unit having an attachment part at a tip end and an engagement part connected to the attachment part to the main body part, The mounting portion has a ridge line pointed toward the engagement portion, and an end face of the mounting portion has a triangular mountain-like portion connected to the ridge line, The engaging portion has an abutment surface with which the ridge line of the peak portion can abut; A detachable mechanism having The main body portion has an attachment portion that can be attached to a traveling machine body, The working unit is capable of ground work. A work machine comprising:

[0057] Appendix 6 The mounting portion has a recessed groove that opens in a semicircular shape on a side of the mounting portion, a boss portion disposed parallel to a central axis of the recessed groove and into which a connecting shaft for connecting to the working portion is inserted; a ridge-like portion disposed in the vicinity of the recessed groove and the boss portion, the ridge-like portion having a ridge line in a direction intersecting a central axis of the recessed groove and a central axis of the boss portion, the ridge-like portion being disposed across the recessed groove and the boss portion; Equipped with The engagement portion includes an engagement pin that is engageable with the recessed groove; a hole into which the connecting shaft can be inserted together with the boss portion to fix the engaging portion and the mounting portion; Detachable mechanism with 6. The working machine according to claim 5, further comprising:

[0058] Appendix 7 The engagement portion includes a connection plate for mounting the engagement pin and the boss portion; the connecting plate has an opening having a sloped portion into which the engaging portion is inserted; 7. The work machine according to claim 5, further comprising:

[0059] Appendix 8 The mounting portion has a rotation portion that is rotatable relative to the main body portion. 8. The work machine according to claim 5, 6 or 7, further comprising:

[0060] Appendix 9 a main frame to which the mounting portion is fixed; An extension means for connecting the main frame and the attachment / detachment mechanism; 9. The work machine according to claim 5, 6, 7 or 8, further comprising: [Explanation of symbols]

[0061] 11 Main Frame 111 Mounting attachment part (lower) 112 Mounting attachment part (top) 21 Mast frame 211 Mast frame pivot shaft 22 Input shaft 23 Irregular Section 24 Hydraulic Pump 25 Directional control valve (valve unit) 212 Horizontal rotating cylinder 24 Fluid pressure source 25 Directional control valve 31 Oil Tank 41 Expanding means 411 First Boom 411A First boom rotation shaft 412 1st connector 413 Second Boom 414 2nd connector 415 First Cylinder 416 No. 2 cylinder 417 3rd cylinder 418 4th cylinder 42 Link mechanism 51 Working Section 512 Rotational Axis 6. Detachable mechanism 60 Mounting Part 601 Sinkhole 603 Boss 604 Ridge 605 Ridgeline 606 Rotating part 62 Connecting shaft 65 Engagement part 651 Engagement pin 652 Hole 653 Contact surface 654 Connection plate 655 Opening 656 Slope a Main body A Work equipment B. Running body

Claims

1. A detachment mechanism for attaching and detaching a working unit having an attachment part at a tip end and an engagement part connected to the attachment part to the main body part, The mounting portion has a ridge line pointed toward the engagement portion, and an end face of the mounting portion has a triangular mountain-like portion connected to the ridge line, The engaging portion has an abutment surface with which the ridge line of the peak portion can abut; Equipped with The mounting portion has a recessed groove that opens in a semicircular shape on a side of the mounting portion, a boss portion disposed parallel to a central axis of the recessed groove and into which a connecting shaft for connecting to the working portion is inserted; a ridge-like portion disposed in the vicinity of the recessed groove and the boss portion, the ridge-like portion having a ridge line in a direction intersecting a central axis of the recessed groove and a central axis of the boss portion, the ridge-like portion being disposed across the recessed groove and the boss portion, The engagement portion includes an engagement pin that is engageable with the recessed groove; a hole into which the connecting shaft can be inserted together with the boss portion to fix the engaging portion and the mounting portion; A detachment mechanism comprising:

2. The procedure for attaching the mounting part is as follows: (1) The opening of the recessed groove is directed downward and lowered toward the engagement portion, (2) Insert the engagement pin of the engagement portion into the recessed groove; (3) Rotate the mounting part using the recessed groove and the engagement pin as a fulcrum. (4) bringing the ridge-like portion into contact with the contact surface; (5) Align the hole with the boss, pass the connecting shaft through, and secure the connecting shaft to the mounting part and the engagement part to complete the installation. The attachment / detachment mechanism according to claim 1 .

3. The engagement portion includes a connection plate for mounting the engagement pin and the boss portion; the connecting plate has an opening having a sloped portion for inserting the mounting portion; 3. The attachment / detachment mechanism according to claim 1, further comprising:

4. The mounting portion has a rotation portion that is rotatable relative to the main body portion.

4. The attachment / detachment mechanism according to claim 1, further comprising:

5. A detachment mechanism for attaching and detaching a working unit having an attachment part at a tip end and an engagement part connected to the attachment part to the main body part, The mounting portion has a ridge line pointed toward the engagement portion, and an end face of the mounting portion has a triangular mountain-like portion connected to the ridge line, The engaging portion has an abutment surface with which the ridge line of the peak portion can abut; A detachable mechanism having The main body includes a mounting portion that can be mounted on a traveling machine body, the working unit is capable of ground work, The mounting portion has a recessed groove that opens in a semicircular shape on a side of the mounting portion, a boss portion disposed parallel to a central axis of the recessed groove and into which a connecting shaft for connecting to the working portion is inserted; a ridge-like portion disposed in the vicinity of the recessed groove and the boss portion, the ridge-like portion having a ridge line in a direction intersecting a central axis of the recessed groove and a central axis of the boss portion, the ridge-like portion being disposed across the recessed groove and the boss portion, The engagement portion includes an engagement pin that is engageable with the recessed groove; a hole into which the connecting shaft can be inserted together with the boss portion to fix the engaging portion and the mounting portion; Detachable mechanism with A work machine comprising:

6. The procedure for attaching the mounting part is as follows: (1) With the opening of the recessed groove facing downward, the mounting part is lowered toward the engagement part; (2) Insert the engagement pin of the engagement portion into the recessed groove; (3) Rotate the mounting part using the recessed groove and the engagement pin as a fulcrum. (4) bringing the ridge-like portion into contact with the contact surface; (5) Align the hole with the boss, pass the connecting shaft through, and secure the connecting shaft to the mounting part and the engagement part to complete the installation.

6. A work machine according to claim 5.

7. The engagement portion includes a connection plate for mounting the engagement pin and the boss portion; the connecting plate has an opening having a sloped portion for inserting the mounting portion; 7. The work machine according to claim 5, further comprising:

8. The mounting portion has a rotation portion that is rotatable relative to the main body portion.

8. The work machine according to claim 5, 6 or 7, further comprising:

9. a main frame to which the mounting portion is fixed; An extension means for connecting the main frame and the attachment / detachment mechanism; 9. The work machine according to claim 5, 6, 7 or 8, further comprising:

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