Ripper point mounting structure, ripper point, and lock member

Abstract

To provide a ripper point mounting structure that allows a ripper point to be easily attached and detached.SOLUTION: In a ripper point mounting structure 6, a pin member 13 is inserted into a first pin hole 23 formed in a ripper shank 11 and a second pin hole 42 formed in a ripper point 12. A lock member 14 is engaged with a pin member 13 to retain the pin member 13. The ripper point 12 has an opening 40h, an internal space S, and a guide groove 41. The opening 40h is formed at a rear end 40i. The interior space S is formed from the opening 40h toward a tip surface 40g. The guide groove 41 is formed in a part of an inner surface 40s forming the internal space S in a predetermined range from the rear end 40i toward the front end surface 40g. A second pin hole 42 of the ripper point 12 is arranged on a bottom surface 41a of the guide groove 41. The lock member 14 is arranged in the space forming the guide groove 41.SELECTED DRAWING: Figure 12B

Description

[Technical field]

[0001] The present invention relates to a ripper point mounting structure and a ripper point. [Background technology]

[0002] As a conventional technique, Patent Document 1 discloses a ripper point mounting structure for a ripper device. In the conventional ripper point mounting structure for a ripper device, the ripper point is attached to the ripper shank via a pin member. In this case, for example, a groove is formed in the center of the pin member, and a C-shaped retainer is engaged with the groove to prevent the pin member from coming off. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-148113 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional ripper point mounting structure, frictional resistance is large when the pin member passes through the retainer, making it difficult to attach the pin member to the ripper point and the ripper shank. Also, when replacing the ripper point, it is difficult to remove the pin member from the ripper point and the ripper shank.

[0005] An object of the present disclosure is to provide a ripper point mounting structure that allows a ripper point to be easily attached and detached. Also, an object of the present disclosure is to provide a ripper point that allows a ripper point to be easily attached and detached to an attachment target. [Means for solving the problem]

[0006] A ripper point mounting structure according to a first aspect is a ripper point mounting structure for a ripper device, and includes a ripper point, a ripper shank, a pin member, and a locking member. The ripper point has a wedge shape from the front end to the rear end. The ripper point is attached to the ripper shank. The pin member is inserted into a first through hole formed in the ripper shank and a second through hole formed in the ripper point. The locking member engages with the pin member to prevent the pin member from coming off. The ripper point has an opening, an internal space, and a recess. The opening is formed at the rear end. The internal space is formed from the opening toward the front end. The recess is formed in a predetermined range from the rear end to the front end in a part of the inner surface forming the internal space. The second through hole of the ripper point is arranged at the bottom surface of the recess. The locking member is arranged in the space forming the recess.

[0007] A ripper point according to a second aspect is a ripper point that can be attached to a ripper shank, and includes a ripper point body, a recess, and a pin hole. The ripper point body has an opening formed at the rear end and an internal space formed from the opening toward the tip. The recess is formed in a predetermined range from the rear end toward the tip in a part of the inner surface that forms the internal space. The through hole is provided in the bottom surface of the recess. Effect of the Invention

[0008] The ripper point mounting structure of the present disclosure allows the ripper point to be easily attached and detached. Also, the ripper point of the present disclosure can be easily attached and detached from the object to which it is attached. [Brief description of the drawings]

[0009] [Figure 1] 1 is a side view showing a ripper device according to a first embodiment of the present disclosure. [Figure 2A] 1 is a perspective view showing a ripper point mounting structure in a first embodiment according to the present disclosure. [Figure 2B] 1 is a perspective view showing a ripper point mounting structure in a first embodiment according to the present disclosure. [Figure 2C] FIG. 1 is a side view showing a ripper point mounting structure in a first embodiment according to the present disclosure. [Diagram 3] 1 is an exploded perspective view showing a ripper point mounting structure in a first embodiment according to the present disclosure. [Figure 4A] FIG. 2 is a perspective view showing a ripper shank according to the first embodiment of the present disclosure. [Figure 4B] FIG. 2 is a perspective view showing a ripper shank according to the first embodiment of the present disclosure. [Figure 5A] 3 is a side view showing a nose portion of a ripper shank in the first embodiment according to the present disclosure. FIG. [Figure 5B] 5B is a cross-sectional view taken along line DD' in FIG. 5A. [Figure 5C] FIG. 4 is an enlarged view of a first pinhole in the first embodiment according to the present disclosure. [Figure 6] FIG. 1 is a side view showing a ripper point mounting structure in a first embodiment according to the present disclosure. [Figure 7] (a) A cross-sectional view in plane (a) of FIG. 6; (b) A cross-sectional view in plane (b) of FIG. 6; (c) A cross-sectional view in plane (c) of FIG. 6; (d) A cross-sectional view in plane (d) of FIG. 6; (e) A cross-sectional view in plane (e) of FIG. 6; (f) A cross-sectional view in plane (f) of FIG. 6. [Figure 8A] FIG. 2 is a perspective view showing a ripper point according to the first embodiment of the present disclosure. [Figure 8B] FIG. 2 is a front view showing a ripper point according to the first embodiment of the present disclosure. [Figure 9] 1 is a side cross-sectional view showing a ripper point mounting structure in a first embodiment according to the present disclosure. [Figure 10A] 2D is a cross-sectional view taken along the arrows between E and E in FIG. 2C. [Figure 10B] 4 is a side view showing the positional relationship between a pin member and a pin hole of the ripper point mounting structure in the first embodiment according to the present disclosure. FIG. [Figure 11] FIG. 2 is a perspective view showing a pin member and a lock member of the ripper point mounting structure in the first embodiment according to the present disclosure. [Figure 12A]FIG. 2 is a side view showing an unlocked state of the ripper point mounting structure in the first embodiment according to the present disclosure. [Figure 12B] FIG. 2 is a side view showing a locked state of the ripper point mounting structure in the first embodiment according to the present disclosure. [Figure 13A] FIG. 11 is a side view showing an unlocked state of a ripper point mounting structure in a second embodiment according to the present disclosure. [Figure 13B] FIG. 11 is a side view showing a locked state of a ripper point mounting structure in a second embodiment according to the present disclosure. [Figure 13C] FIG. 11 is a side view showing a locking member of a ripper point mounting structure in a second embodiment according to the present disclosure. [Figure 13D] FIG. 13 is a side view showing a locking member of a ripper point mounting structure in a modified example of the second embodiment according to the present disclosure. [Figure 14] 14(a) is a side view showing a ripper point mounting structure in a third embodiment according to the present disclosure, and FIG. 14(b) is an enlarged view of a portion F in FIG. 14(a). [Figure 15] FIG. 11 is a side view showing the positional relationship between a pin hole and a pin member of a ripper point mounting structure in a modified example of an embodiment according to the present disclosure. [Figure 16A] FIG. 13 is a perspective view showing a state in which a pin member and a lock member are disposed on a ripper shank in a modified example of an embodiment according to the present disclosure. [Figure 16B] FIG. 13 is a perspective view showing a state in which a pin member and a lock member are disposed on a ripper shank in a modified example of an embodiment according to the present disclosure. [Figure 17] FIG. 11 is a side view showing a ripper point mounting structure in a modified example of an embodiment according to the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a ripper point mounting structure according to an embodiment of the present disclosure will be described with reference to the drawings.

[0011] (Embodiment 1) The configuration of a ripper point mounting structure in the ripper device 1 according to the first embodiment will be described with reference to the drawings.

[0012] (Overview of Ripper Device 1) FIG. 1 is a side view showing the ripper device 1. FIG.

[0013] The ripper device 1 is attached to, for example, a bulldozer. The ripper device 1 is attached to the rear of the body of the bulldozer. The ripper device 1 has an arm 2, a lift cylinder 3, a tilt cylinder 4, a ripper support member 5, and a ripper point mounting structure 6.

[0014] One end of the arm 2 is connected to the body of the bulldozer, and the other end of the arm 2 is connected to a ripper support member 5. The ripper support member 5 is attached to the arm 2 so as to be rotatable.

[0015] One end of each of the lift cylinder 3 and the tilt cylinder 4 is connected to the body of the bulldozer. The other end of each of the lift cylinder 3 and the tilt cylinder 4 is connected to a ripper support member 5. The ripper support member 5 is rotatably attached to the lift cylinder 3 and the tilt cylinder 4. The lift cylinder 3 and the tilt cylinder 4 are hydraulic cylinders.

[0016] The ripper point mounting structure 6 detachably mounts the ripper point 12 to the ripper device 1.

[0017] (Ripper point mounting structure 6) Fig. 2A is an enlarged perspective view of the ripper point mounting structure 6 as viewed from the rear side. Fig. 2B is an enlarged perspective view of the ripper point mounting structure 6 as viewed from the front side, different from Fig. 2A. Fig. 2C is a side view of the ripper point mounting structure 6. Fig. 3 is an exploded view of the ripper point mounting structure 6.

[0018] As shown in FIG. 1, the ripper point mounting structure 6 has a ripper shank 11, a ripper point 12, a pin member 13, and a lock member 14.

[0019] The ripper shank 11 is attached to the ripper support member 5. The ripper point 12 is attached to the tip of the ripper shank 11. The pin member 13 is inserted into through holes formed in the ripper point 12 and the ripper shank 11, respectively, and prevents the ripper point 12 from coming off the ripper shank 11. The lock member 14 locks the pin member 13 inserted into the through hole.

[0020] The ripper point mounting structure 6 of this embodiment is further provided with a protector 15 that protects the ripper shank 11 from soil and sand. The protector 15 is provided on the edge of the ripper shank 11 on the vehicle body side. Note that the protector 15 is omitted in Fig. 2B.

[0021] (Ripa Shank 11) Fig. 4A is a perspective view of the ripper shank 11 as viewed from the front side, and Fig. 4B is a perspective view of the ripper shank 11 as viewed from the bottom side.

[0022] The ripper shank 11 is a generally plate-shaped member attached to the ripper support member 5, and has a bent, pointed tip on the excavation side. The ripper shank 11 is made of, for example, steel. The ripper shank 11 is preferably made by forging, but is not limited to this and may be made by casting.

[0023] As shown in FIGS. 4A and 4B, the ripper shank 11 has a main body portion 21, a nose portion 22, and a first pin hole 23 (an example of a through hole).

[0024] (Main body 21) The main body 21 is disposed substantially along the vertical direction, and is attached to the ripper support member 5. An end (lower end portion) of the main body 21 on the excavation side is bent toward the front side of the vehicle body.

[0025] (Nose part 22) The nose portion 22 is disposed at the excavation side end (lower end) of the main body portion 21. The nose portion 22 is formed integrally with the main body portion 21. The nose portion 22 is formed so as to extend downward and forward from the main body portion 21.

[0026] Fig. 4A also shows an enlarged view of the vicinity of nose portion 22 (see B surrounded by a dashed line). Fig. 4B also shows an enlarged view of the vicinity of nose portion 22 (see C surrounded by a dashed line). Fig. 5A is a side view showing the vicinity of nose portion 22. Fig. 5B is a cross-sectional view showing the area between DD' in Fig. 5A.

[0027] 4A and 4B, nose portion 22 is formed in a tapered shape. Nose portion 22 is formed long in one direction. The direction in which nose portion 22 extends (which can also be said to be the longitudinal direction) is defined as axis A1 (see FIG. 5A).

[0028] The nose portion 22 has a first surface 22a on the inside of the bend, a second surface 22b on the outside of the bend, a third surface 22c and a fourth surface 22d that are side surfaces that are provided opposite to each other so as to connect both ends of the first surface 22a and the second surface 22b in the width direction (direction perpendicular to the axis A1), and a tip surface 22e that is provided to connect the tips of the first surface 22a, the second surface 22b, the third surface 22c, and the fourth surface 22d. The first surface 22a and the second surface 22b are generally rectangular in plan view. The third surface 22c and the fourth surface 22d are generally triangular in side view. The tip surface 22e is generally rectangular in front view. Recesses 22f are formed between the first surface 22a and the third surface 22c, between the first surface 22a and the fourth surface 22d, between the second surface 22b and the third surface 22c, and between the second surface 22b and the fourth surface 22d.

[0029] Axis A1 in FIG. 2C passes through the center of tip surface 22e of nose portion 22 and the center of gravity of nose portion 22, for example, when viewed from the front when tip surface 22e of nose portion 22 is viewed from the outside.

[0030] As shown in FIG. 5A, the nose portion 22 has a tip portion 31, a base portion 32, and a connecting portion 33.

[0031] The tip portion 31 is provided at the tip of the nose portion 22. The base portion 32 is provided on the main body side of the nose portion 22 and is connected to the main body portion 21. The connecting portion 33 is provided on the nose portion 22 between the tip portion 31 and the base portion 32.

[0032] FIG. 6 is a side view showing the ripper point mounting structure 6. Each of FIG. 7(a) to FIG. 7(e) is a diagram showing a cross section of the ripper point mounting structure along the cutting lines (a) to (e) shown in FIG. 6. FIG. 7(a) is a cross section of the ripper point mounting structure 6 at the tip 31. FIG. 7(b) is a cross section of the ripper point mounting structure 6 at the start end (start end as viewed from the tip 31 side) of the recess 22f along the axis A1. FIG. 7(c) is a cross section of the ripper point mounting structure 6 at the center of the recess 22f along the axis A1. FIG. 7(d) is a cross section of the ripper point mounting structure 6 at the end (end end as viewed from the tip 31 side) of the recess 22f along the axis A1. FIG. 7(e) is a cross section of the ripper point mounting structure 6 at the center of the first pin hole 23 along the axis A1. FIG. 7(f) is a cross-sectional view of the ripper point attachment structure 6 at the rear end (the terminal end as viewed from the tip portion 31 side) of the first pin hole 23 along the axis A1.

[0033] 6 and 7(a), the outer periphery of a cross section of the tip portion 31 cut by a cut surface (a) perpendicular to the axis A1 of the nose portion 22 is formed into a rectangular shape. Note that the "outer periphery" may be interpreted as the "outer shape." In the following, the "plane" perpendicular to the axis A1 of the nose portion 22 is referred to as the "cut surface."

[0034] 6, the tip portion 31 is disposed in the internal space S of the ripper point 12 so as to be able to come into contact with the inner surface of the ripper point 12 in the axial direction in which the axis A1 of the nose portion 22 extends. Here, the tip portion 31 is defined as a portion having a rectangular outer shape in a cross section.

[0035] As shown in FIG. 5A, the base end 32 is provided continuous with the main body 21. For example, the base end 32 is formed integrally with the main body 21. As shown in FIG. 6, FIG. 7(e) and FIG. 7(f), the outer periphery of the cross section of the base end 32 cut by the cut surfaces (e) and (f) is formed in a rectangular shape. Here, the base end 32 is defined as the part whose outer shape on the cut surface is rectangular. The part from the tip end 31 to the base end 32 is defined as the nose portion 22. Also, as shown in FIG. 7(e), the first pin hole 23 is formed in the base end 32.

[0036] The range of the body portion 21 and the nose portion 22 in the ripper shank 11 is not particularly limited, and the portion of the ripper shank 11 on the tip side from the lower end of the protector 15 may be the nose portion 22, and the portion above the lower end of the protector 15 may be the body portion 21. Also, for example, the straight portion of the ripper shank 11 may be the body portion 21, and the curved portion may be the nose portion 22.

[0037] 6, the connecting portion 33 is provided between the tip portion 31 and the base portion 32. The connecting portion 33 is formed integrally with the tip portion 31 and the base portion 32, for example.

[0038] The outer periphery of the connecting portion 33 is formed in an octagon. For example, the outer periphery of the cross section of the connecting portion 33 cut by the cut surface (b), the cut surface (c), and the cut surface (d) is formed in an octagon. The above-mentioned recess 22f is formed in the connecting portion 33. That is, since the recess 22f is formed in the connecting portion 33 at each of the four corners formed by the four faces 22a, 22b, 22c, and 22d of the nose portion 22, the cross section of the connecting portion 33 is octagonal, and the cross sections of the tip portion 31 and the base portion 32 are rectangular. In this way, the part whose cross section has an outer periphery formed in an octagon is defined as the connecting portion 33.

[0039] In addition, the cut surfaces (b) and (d) correspond to the ends of the recess 22f and therefore have a shape close to a rectangle.

[0040] Of the eight sides of the octagon, opposing sides L1 are provided parallel to a plane P1 that includes the axis A1 of the nose portion 22 and the axis A2 of the pin member 13. As shown in Figures 4A and 7(c), each of the two ends of side L1 forms a first ridge portion R1 that connects the corner portion 32a of the base end portion 32 and the corner portion 31a of the tip portion 31. The opposing sides L1 correspond to the widths perpendicular to the axis A1 of the first surface 22a and the second surface 22b, respectively.

[0041] Of the eight sides of the octagon, opposing sides L5 are perpendicular to plane P1. As shown in Figures 4A and 7(c), each of the two ends of side L5 forms a third ridge R3 connecting corner 32a of base end 32 and corner 31a of tip end 31. The opposing sides L5 correspond to the widths of third surface 22c and fourth surface 22d perpendicular to axis A1.

[0042] As shown in Figures 7(b) and 7(c), side L3, which is between sides L1 and L5 of the connecting portion 33 and is adjacent to sides L1 and L5, is one side of the outer periphery of the octagon of the connecting portion 33. Side L3 forms a surface between the first ridge portion R1 and the third ridge portion R3. Side L3 is provided as four of the eight sides of the octagon. Each of the four sides L3 corresponds to the width perpendicular to the axis A1 of the recess 22f.

[0043] 7(d) and 7(c), the length of side L1 of the center of connecting portion 33 in the longitudinal direction (the length of side L1 in FIG. 7(c)) is shorter than the length of side L1 on the base end portion 32 side of connecting portion 33 (the length of side L1 in FIG. 7(d)). Also, the length of side L1 of the center of connecting portion 33 in the longitudinal direction (the length of side L1 in FIG. 7(c)) is shorter than the length of side L1 on the tip end portion 31 side of connecting portion 33 (the length of side L1 in FIG. 7(b)).

[0044] Side L1 gradually becomes shorter from the base end 32 toward the center of the connecting portion 33 (see Figs. 7(d) and 7(c)). Side L1 gradually becomes longer from the center of the connecting portion 33 toward the tip end 31 (see Figs. 7(c), 7(b), 4A, and 4B).

[0045] 7(b), 7(c), and 7(d), the length of side L3 of the center of the connecting portion 33 in the longitudinal direction (the length of side L3 in FIG. 7(c)) is longer than the length of side L3 on the base end 32 side of the connecting portion 33 (the length of side L3 in FIG. 7(d)). Also, the length of side L3 of the center of the connecting portion 33 in the longitudinal direction (the length of side L3 in FIG. 7(c)) is longer than the length of side L3 on the tip end 31 side of the connecting portion 33 (the length of side L3 in FIG. 7(b)).

[0046] 3, side L3 gradually becomes longer from the base end 32 toward the center of the connecting portion 33 (see FIGS. 7(d) and 7(c)). Side L3 gradually becomes shorter from the center of the connecting portion 33 toward the tip end 31 (see FIGS. 7(c) and 7(b)).

[0047] Side L5 gradually becomes shorter from the base end 32 toward the center of the connecting portion 33 (see Figs. 7(d), 7(c), 4A, and 4B). Side L5 gradually becomes shorter from the center of the connecting portion 33 toward the tip end 31 (see Figs. 7(c) and 7(b)).

[0048] The recess 22f corresponds to a portion of the connecting portion 33 that is sandwiched between the first ridge portion R1 and the third ridge portion R3.

[0049] In addition, the rectangular apex (corner 31a) of the tip portion 31, the octagonal apex of the connecting portion 33, and the rectangular apex (corner 32a) of the base portion 32 are connected in order from the tip portion 31 to the base portion 32.

[0050] (First pin hole 23) The first pin hole 23 is provided in the nose portion 22. The first pin hole 23 extends in a direction perpendicular to the axis A1 of the nose portion 22. In detail, the first pin hole 23 is provided in the base end portion 32 as described above.

[0051] 5C is an enlarged side view of the first pin hole 23 shown in FIG. 5A. The pin member 13 is inserted into the first pin hole 23 of the nose portion 22. As shown in FIG. 5C, the inner peripheral surface of the first pin hole 23 is formed in an elongated hole shape. As shown in FIG. 5C, the first inner peripheral surface 23a of the first pin hole 23 formed on the tip surface 22e side of the nose portion 22 is formed in an arc shape. The radius forming the first inner peripheral surface 23a is larger than the radius of the pin member 13.

[0052] The second inner circumferential surface 23b of the first pin hole 23 formed on the side opposite to the tip surface 22e of the nose portion 22 (which can also be said to be the main body portion 21 side) is formed in an arc shape. The radius forming the second inner circumferential surface 23b is larger than the radius of the pin member 13. The distance (major axis) between the first inner circumferential surface 23a and the second inner circumferential surface 23b is larger than the diameter of the pin member 13. The major axis is disposed along the axis A1, for example.

[0053] The pair of third inner circumferential surfaces 23c formed between the first inner circumferential surface 23a and the second inner circumferential surface 23b are formed in a flat shape. The distance (minor axis) between the pair of third inner circumferential surfaces 23c is larger than the diameter of the pin member 13.

[0054] 10A, when the ripper point 12 is attached to the ripper shank 11, the pin member 13 connecting the ripper point 12 and the ripper shank 11 contacts the first inner circumferential surface 23a. Since the cross-sectional outer shape of the pin member 13 is circular, a gap T is formed between the pin member 13 and the second inner circumferential surface 23b on the base end portion 32 side (main body portion 21 side) as described below.

[0055] (Rippa Point 12) 2A to 2C and 3, the ripper point 12 is attached to the ripper shank 11. The ripper point 12 has a wedge shape from a tip surface 40g (an example of a tip) to a rear end 40i.

[0056] Fig. 8A is a perspective view of the ripper point 12 viewed from the opposite side to the tip. As shown in Fig. 8A, the ripper point 12 has an internal space S (see Fig. 6) for inserting the nose portion 22 of the ripper shank 11. The inner surface of the ripper point 12 is formed along the outer surface of the ripper shank 11. The ripper point 12 is formed from, for example, steel. The ripper point 12 is preferably made by forging, but is not limited to this and may be made by casting.

[0057] When attached to the ripper shank 11, the ripper point 12 extends along the axis A1 as shown in FIG. 2C.

[0058] As shown in FIG. 8A, the ripper point 12 has a ripper point body 40, a guide groove 41 (an example of a recess), and a second pin hole 42.

[0059] The ripper point body 40 is formed in a cylindrical shape with a bottom. The inner surface of the ripper point body 40 is formed along the outer surface of the nose portion 22. The inner surface of the ripper point body 40 is formed in a tapered shape. By forming the ripper point body 40 in this manner, the above-mentioned internal space S is formed. The nose portion 22 of the ripper shank 11 is disposed in the internal space S (see FIG. 6).

[0060] As shown in FIG. 8A, the ripper point body 40 has an inner surface 40s that forms an internal space S, which includes a first surface 40a, a second surface 40b, a third surface 40c and a fourth surface 40d that are opposing side surfaces, and a tip surface 40e.

[0061] The first surface 40a is a surface located on the inside of the bend when the ripper point 12 is attached to the ripper shank 11. The second surface 40b is a surface located on the outside of the bend when the ripper point 12 is attached to the ripper shank 11. The first surface 40a and the second surface 40b are generally rectangular in plan view. The third surface 40c is formed so as to connect the first surface 40a and the second surface 40b. The fourth surface 40d is formed so as to connect the first surface 40a and the second surface 40b. The third surface 40c and the fourth surface 40d are generally triangular in side view. The tip surface 40e is formed so as to connect the tip end of the first surface 40a, the tip end of the second surface 40b, the tip end of the third surface 40c, and the tip end of the fourth surface 40d.

[0062] When the ripper point 12 is attached to the ripper shank 11, the first surface 40a faces the first surface 22a, the second surface 40b faces the second surface 22b, the third surface 40c faces the third surface 22c, and the fourth surface 40d faces the fourth surface 22d. Fig. 9 is a side cross-sectional view of the ripper point 12 attached to the ripper shank 11. As shown in Fig. 9, when the ripper point 12 is attached to the ripper shank 11, the tip surface 40e faces the tip surface 22e of the nose portion 22 and abuts against the tip surface 22e.

[0063] The first surface 40a and the first surface 22a, the second surface 40b and the second surface 22b, the third surface 40c and the third surface 22c, the fourth surface 40d and the fourth surface 22d, and the tip surface 40e and the tip surface 22e are each formed to be approximately the same size.

[0064] As shown in Fig. 8A, protrusions 40f are formed between the first surface 40a and the third surface 40c, between the first surface 40a and the fourth surface 40d, between the second surface 40b and the third surface 40c, and between the second surface 40b and the fourth surface 40d. When the ripper point 12 is attached to the ripper shank 11, each protrusion 40f faces and contacts one of the four recesses 22f. The protrusions 40f are formed in a shape corresponding to the recesses 22f that they face.

[0065] As shown in FIG. 8B, the outer shape of the ripper point body 40 is formed so that, for example, the first surface 40a, the second surface 40b, the third surface 40c, and the fourth surface 40d are substantially parallel to each other and are connected to a tip surface 40g.

[0066] The guide groove 41 is for guiding the lock member 14 toward the pin member 13. The guide groove 41 is provided on the inner surface of the ripper point body 40 as shown in FIG. 8A. The guide groove 41 is provided on each of the third surface 40c and the fourth surface 40d. The guide groove 41 extends along the inner surface 40s of the ripper point body 40 from the edge of the opening 40h formed at the rear end 40i of the ripper point body 40 toward the tip surface 40e of the ripper point body 40. The guide groove 41 extends along the axis A1 direction.

[0067] The second pin hole 42 penetrates the ripper point body 40. The second pin hole 42 is formed in each of the third surface 40c and the fourth surface 40d. For example, the second pin hole 42 is formed in the ripper point body 40 so as to be able to communicate with the first pin hole 23 (see FIG. 7(e)). The second pin hole 42 is provided in the guide groove 41. The second pin hole 42 penetrates the bottom surface 41a of the guide groove 41. A pin member 13 is arranged in the second pin hole 42.

[0068] As shown in Figs. 6 and 7, the inner circumference of the cross section of the ripper point 12 cut along the above-mentioned cutting planes (a) to (e) is formed as follows.

[0069] As shown in FIGS. 6 and 7, the portion of the ripper point body 40 facing the nose portion 22 has a first portion 51, a second portion 52, and a third portion 53.

[0070] 7, the first portion 51 is a portion of the ripper point body 40 that faces the tip portion 31 of the nose portion 22. The inner surface of the first portion 51 is formed along the outer surface of the tip portion 31 of the nose portion 22. The inner periphery of the cross section obtained by cutting the first portion 51 along the cutting plane (a) is formed into a rectangular shape.

[0071] As shown in Figures 7(e) and 7(f), the second portion 52 is a portion of the ripper point body 40 that faces the base end portion 32 of the nose portion 22. The inner surface of the second portion 52 is formed along the outer surface of the base end portion 32 of the nose portion 22. The inner periphery of a cross section obtained by cutting the second portion 52 at the cutting surfaces (e) and (f) is formed in a rectangular shape. The second pin hole 42 is mostly formed in the second portion 52, and a portion is formed in the third portion 53, which will be described later.

[0072] As shown in Figures 7(b), 7(c), and 7(d), the third portion 53 is a portion of the ripper point body 40 that faces the connecting portion 33 of the nose portion 22. The inner surface of the third portion 53 is formed along the outer surface of the connecting portion 33 of the nose portion 22. For example, the inner circumference of a cross section obtained by cutting the third portion 53 by the cutting surfaces (b), (c), and (d) is formed into an octagon.

[0073] In the third portion 53, opposing sides L2 of an octagon are formed parallel to the plane P1. As shown in FIG. 8A, FIG. 7(b), FIG. 7(c), and FIG. 7(d), a second ridge portion R2 is formed on the inner surface of the third portion 53 by both ends of the side L2 of the octagon. The second ridge portion R2 connects the corner portion 51a of the first portion 51 and the corner portion 52a of the second portion 52. In a state in which the ripper point 12 is attached to the ripper shank 11, the side L2 faces the side L1, and the second ridge portion R2 is disposed so as to face the first ridge portion R1 (see FIG. 3) of the ripper shank 11 (connecting portion 33). The opposing sides L2 correspond to the widths of the first surface 40a and the second surface 40b perpendicular to the axis A1, respectively.

[0074] Also, an opposing side L6 of the octagon perpendicular to the side L2 is formed. As shown in Fig. 8A, Fig. 7(b), Fig. 7(c), and Fig. 7(d), a fourth ridgeline R4 is formed on the inner surface of the third portion 53 by both ends of the side L6. The fourth ridgeline R4 connects the corner portion 51a of the first portion 51 and the corner portion 52a of the second portion 52. When the ripper point 12 is attached to the ripper shank 11, the side L6 faces the side L5, and the fourth ridgeline R4 is disposed to face the third ridgeline R3 of the ripper shank 11 (connecting portion 33). The opposing sides L6 correspond to the widths of the third surface 40c and the fourth surface 40d perpendicular to the axis A1, respectively.

[0075] As shown in Fig. 7(b), Fig. 7(c) and Fig. 7(d), a side L4 between the side L2 and the side L6 of the third portion 53 and adjacent to the side L2 and the side L6 is one side of the outer periphery of the octagon of the third portion 53. The side L4 forms a surface between the second ridge line portion R2 and the fourth ridge line portion R4. A protrusion 40f is formed between the second ridge line portion R2 and the fourth ridge line portion R4. The side L4 is provided as four of the eight sides of the octagon. Moreover, the four sides L4 each correspond to a width perpendicular to the axis A1 of the protrusion 40f.

[0076] 7(b), 7(c), and 7(d), the length of side L2 of the center of the third portion 53 in the longitudinal direction (axis A1 direction) (the length of side L2 in FIG. 5B(c)) is shorter than the length of side L2 of the third portion 53 on the second portion 52 side (the length of side L2 in FIG. 5B(d)). Also, the length of side L2 of the center of the third portion 53 in the longitudinal direction (the length of side L2 in FIG. 7(c)) is shorter than the length of side L2 of the third portion 53 on the first portion 51 side (the length of side L2 in FIG. 7(b)).

[0077] Side L2 gradually becomes shorter from the second portion 52 toward the center of the third portion 53 (see FIGS. 7(d) and 7(c)). Side L2 gradually becomes longer from the center of the third portion 53 toward the first portion 51 (see FIGS. 7(c), 7(b) and 8A).

[0078] 7(b), 7(c), and 7(d), the length of side L4 of the center of the third portion 53 in the longitudinal direction (the length of side L4 in FIG. 7(c)) is longer than the length of side L4 of the third portion 53 on the second portion 52 side (the length of side L4 in FIG. 7(d)). Also, the length of side L4 of the center of the third portion 53 in the longitudinal direction (the length of side L4 in FIG. 7(c)) is longer than the length of side L4 of the third portion 53 on the first portion 51 side (the length of side L4 in FIG. 7(b)).

[0079] Side L4 gradually becomes longer from the second portion 52 toward the center of the third portion 53 (see FIGS. 7(d), 7(c) and 8A). Side L4 gradually becomes shorter from the center of the third portion 53 toward the first portion 51 (see FIGS. 7(c) and 7(b)).

[0080] Side L6 gradually becomes shorter from the second portion 52 toward the center of the third portion 53 (see FIGS. 7(d), 7(c) and 8A). Side L6 gradually becomes shorter from the center of the third portion 53 toward the first portion 51 (see FIGS. 7(c) and 7(b)).

[0081] In addition, the rectangular vertex (corner portion 51a) of the first portion 51, the octagonal vertex of the third portion 53, and the rectangular vertex (corner portion 52a) of the second portion 52 are connected in order from the first portion 51 through the third portion 53 to the second portion 52.

[0082] In this way, by forming the second ridgeline portion R2 and the fourth ridgeline portion R4 on the inner surface of the ripper point 12, and by forming the first ridgeline portion R1 and the third ridgeline portion R3 on the ripper shank 11 as described above, the ripper point 12 can be positioned relative to the ripper shank 11. In other words, the gap between the ripper point 12 and the ripper shank 11 can be suppressed.

[0083] (Pin member 13) Fig. 10A is a cross-sectional view taken along the line EE' of Fig. 2C. Fig. 10B is a diagram showing the positional relationship between the pin member 13 and the first pin hole 23 and second pin hole 42. Fig. 11 is a perspective view showing the pin member 13 and the lock member 14.

[0084] As shown in Fig. 3, the pin member 13 connects the ripper shank 11 and the ripper point 12. The pin member 13 is disposed in the first pin hole 23 and the second pin hole 42. The pin member 13 is formed in a columnar shape. The pin member 13 may be formed in a cylindrical shape. The pin member 13 has an axis A2.

[0085] As shown in FIG. 9, with the tip surface 22e of the nose portion 22 abutting against the tip surface 40e of the internal space S of the ripper point 12, the pin member 13 is disposed in the first pin hole 23 and the second pin hole 42.

[0086] 10, the pin member 13 contacts the first inner circumferential surface 23a of the first pin hole 23 on the tip portion 31 side of the nose portion 22. The pin member 13 also contacts the inner circumferential surface of the second pin hole 42 on the main body portion 21 side of the ripper point main body 40 (the side opposite to the tip portion 31).

[0087] 10A and 10B, the axis A2 is offset from the center A3 of the first pinhole 23 toward the tip 31 of the nose portion 22. In Fig. 10B, an arrow J indicates the tip 31 side.

[0088] With this configuration, when the pin member 13 is disposed in the first pin hole 23 of the ripper shank 11 and the second pin hole 42 of the ripper point 12, a gap T is formed between the pin member 13 and the second inner circumferential surface 23b of the first pin hole 23 on the main body 21 side. Due to this gap T, the pin member 13 is less likely to come into contact with the main body 21 side of the first pin hole 23 during excavation work and penetration work by the ripper device 1. This makes it possible to improve the durability of the pin member 13 and the first pin hole 23.

[0089] The pin member 13 also has an annular groove 13a. The annular groove 13a is formed on the outer circumferential surface of the pin member. The annular groove 13a is formed near one or both ends of the pin member 13. The annular groove 13a is disposed between the ripper shank 11 and the ripper point 12. In detail, the annular groove 13a of the pin member 13 is disposed in the guide groove 41.

[0090] The annular groove 13a engages with the locking member 14. In detail, an engagement portion 61a (described later) of the locking member 14 engages with the annular groove 13a.

[0091] (Lock member 14) The locking member 14 is for preventing the pin member 13 from coming off. As shown in Fig. 11, the locking member 14 engages with the pin member 13 by sliding toward the pin member 13. The locking member 14 engages with the pin member 13 by sliding in a direction from the main body 21 side of the ripper shank 11 toward the pin member 13.

[0092] The locking member 14 is disposed between the ripper shank 11 and the ripper point 12. The locking member 14 is disposed between the outer surface of the nose portion 22 and the inner surface of the ripper point body 40. The locking member 14 is disposed in the guide groove 41 (see FIG. 10A).

[0093] The locking member 14 has a locking body 61 and a claw portion 62 .

[0094] The lock body 61 is, for example, a plate-shaped member. The lock body 61 has an engagement portion 61a and an opening portion 61b. The engagement portion 61a is a portion that engages with the pin member 13. The engagement portion 61a has a C-shaped inner peripheral surface. The engagement portion 61a is fitted into the annular groove 13a of the pin member 13. The opening portion 61b is a portion that guides the pin member 13 to the engagement portion 61a. The distance between the open ends of the opening portion 61b is larger than the diameter of the annular groove 13a of the pin member 13.

[0095] As shown in Fig. 11, the claw portion 62 is a portion that protrudes from the lock body 61. For example, the claw portion 62 is formed integrally with the lock body 61. As shown in Fig. 10A, the claw portion 62 is located outside the ripper point 12 and disposed on the third surface 22c of the nose portion 22. Note that the third surface 22c is a part of the entire side surface 11a of the ripper shank 11 shown in Figs. 1 and 10A.

[0096] The locking member 14 having the above-mentioned configuration is attached as follows.

[0097] First, the ripper point 12 is attached to the ripper shank 11. Then, the pin member 13 is inserted into the second pin hole 42 of the ripper point 12 and the first pin hole 23 of the ripper shank 11. The annular groove 13a of the pin member 13 is disposed in the guide groove 41, as shown in FIG. 10A.

[0098] Next, the locking member 14 is inserted into the guide groove 41 from the edge of the opening 40h of the ripper point 12. Fig. 12A is a side view showing a state in which the locking member 14 is inserted into the guide groove 41. In Fig. 12A, the ripper point 12 is shown by a dotted line for the purpose of explanation.

[0099] The locking member 14 is disposed so that the opening 61b of the locking body 61 faces the annular groove 13a of the pin member 13 (see FIG. 12A). In this state, the engagement between the locking member 14 and the pin member 13 is released (unlocked state).

[0100] In this unlocked state, the claw portion 62 is pressed toward the pin member 13 (see arrow E1). This causes the lock body 61 to slide along the guide groove 41 toward the pin member 13, and the engagement portion 61a of the lock body 61 fits into the annular groove 13a of the pin member 13 (see FIG. 12B). This state is a state in which the lock member 14 and the pin member 13 are engaged with each other (locked state).

[0101] In this manner, in the unlocked state, the pin member 13 is prevented from coming out by sliding the locking member 14 toward the pin member 13. Also, in the locked state, the pin member 13 is released from the prevention of coming out by sliding the locking member 14 away from the pin member 13.

[0102] (Embodiment 2) In the first embodiment, an example has been shown in which the lock member 14 engages with the pin member 13 by sliding in a direction (tip direction) from the main body 21 of the ripper shank 11 toward the pin member 13. Alternatively, a ripper point mounting structure 106 of the second embodiment may be configured as shown in Figures 13A to 13C. Note that configurations whose description is omitted here conform to the configurations of the above-mentioned embodiments.

[0103] 13A and 13B, the locking member 114 engages with the pin member 13 by being slid in a direction away from the pin member 13. For example, the locking member 114 engages with the pin member 13 by sliding in a direction from the pin member 13 toward the main body portion 21 (the direction opposite to the tip direction).

[0104] 13C, the locking member 114 has a locking body 161 and a claw portion 62. The configuration of the claw portion 62 is the same as that of the above embodiment.

[0105] 13C, the lock body 161 is formed, for example, in the shape of a rectangular plate. The lock body 161 has an engagement portion 161a and an opening portion 161b. The engagement portion 161a is a portion that engages with the pin member 13. The engagement portion 161a has, for example, a C-shaped inner circumferential surface. The engagement portion 161a is fitted into the annular groove 13a of the pin member 13.

[0106] The opening 161b is a portion where the pin member 13 is placed before the pin member 13 is engaged with the engaging portion 161a. The opening 161b is provided between the engaging portion 161a and the claw portion 62. The opening 161b has a C-shaped inner peripheral surface. The diameter of the opening 161b is larger than the diameter of the pin member 13.

[0107] The lock member 114 having the above-mentioned configuration is attached as follows.

[0108] First, the ripper point 12 is attached to the ripper shank 11. Next, the locking member 114 is inserted into the guide groove 41. The locking member 114 is disposed such that the opening 161b faces the first pin hole 23 and the second pin hole .

[0109] Next, the pin member 13 is inserted into the second pin hole 42 of the ripper point 12 , the opening 161 b of the lock member 114 , and the first pin hole 23 of the nose portion 22 of the ripper shank 11 .

[0110] The annular groove 13a of the pin member 13 is disposed opposite to the opening 161b of the lock body 161 (see FIG. 13A). In this state, the engagement between the lock member 114 and the pin member 13 is released (unlocked state).

[0111] In this unlocked state, the claw portion 62 is pressed toward the main body 21 (the side of the arrow E2). This causes the lock body 161 to slide in a direction away from the pin member 13. As a result, the engagement portion 161a of the lock body 161 fits into the annular groove 13a of the pin member 13 (see FIG. 13B). This state is a state in which the lock member 114 and the pin member 13 are engaged (locked state).

[0112] In this way, in the unlocked state, the pin member 7 is prevented from coming off by sliding the locking member 114 in a direction away from the pin member 13. Also, in the locked state, the pin member 13 is released from the prevention of its coming off by sliding the locking member 114 in a direction toward the pin member 13.

[0113] The lock member 114 that slides in a direction away from the pin member 13 is not limited to the shape shown in FIG. 13C, and may be a lock member 214 as shown in FIG. 13D.

[0114] The locking member 214 shown in Fig. 13D has a locking body 261 in which a notch 261c is formed around the engaging portion 161a. The notch 261c is formed from the portion of the engaging portion 161a where the pin member 13 is disposed to the outer edge. The notch 261c is formed along the sliding direction. As a result, the engaging portion 161a is divided into two portions.

[0115] The method of attaching the locking member 214 is the same as that of the locking member 114, and the annular groove 13a of the pin member 13 is disposed opposite the opening 161b of the locking body 261, and the claw portion 62 is pressed toward the main body 21 (the arrow E2 side). As a result, the locking body 261 slides in a direction away from the pin member 13, and the engaging portion 161a of the locking body 261 fits into the annular groove 13a of the pin member 13.

[0116] (Embodiment 3) In the locking member 114 of the above-mentioned first and second embodiments, the claw portion 62 is simply disposed on the side surface 11a of the ripper shank 11, but a guarded configuration may be used as in the present embodiment 3. Note that configurations whose description is omitted here conform to the configurations of the above-mentioned embodiments.

[0117] Fig. 14(a) is a perspective view showing a ripper point mounting structure 206 provided with a guard portion 70 around the claw portion 62. Fig. 14(b) is an enlarged view of a portion F in Fig. 14(a).

[0118] The ripper point mounting structure 206 of the third embodiment further includes a guard portion 70. The guard portion 70 is provided to prevent soil and sand, etc. from colliding with the claw portion 62. The guard portion 70 has a plurality of protrusions 71 fixed to the side surface 11a of the ripper shank 11. For example, in FIG. 14(b), the protrusions 71 are provided in a U-shape in a side view so as to surround the periphery of the claw portion 62 except for the ripper point 12 side. From the viewpoint of protecting the claw portion 62, it is preferable that the height of the protrusions 71 from the side surface 11a be greater than the height of the claw portion 62 from the side surface 11a.

[0119] The guard portion 70 also functions as a guide when the lock member 14 is slid.

[0120] In the third embodiment, the guard portion 70 is applied to the locking member 14 having the shape of the first embodiment, but it can also be applied to the locking member 114 having the shape of the second embodiment. <Features etc.> (1) The ripper point mounting structure 6, 106, 206 of any one of the first, second, and third embodiments is a ripper point mounting structure in the ripper device 1, and includes a ripper point 12, a ripper shank 11, a pin member 13, and a lock member 14. The ripper point 12 has a wedge shape from a tip surface 40g (an example of a tip) to a rear end 40i. The ripper shank 11 is fitted with the ripper point 12. The pin member 13 is inserted into a first pin hole 23 (an example of a first through hole) formed in the ripper shank 11 and a second pin hole 42 (an example of a second through hole) formed in the ripper point 12. The lock members 14, 114 are engaged with the pin member 13 to prevent the pin member 13 from coming off. The ripper point 12 has an opening 40h (an example of an opening), an internal space S, and a guide groove 41 (an example of a recess). The opening 40h is formed in the rear end 40i. The internal space S is formed from the opening 40h toward the tip surface 40g (an example of the tip). The guide groove 41 is formed in a predetermined range from the rear end 40i toward the tip surface 40g in a part of the inner surface 40s that forms the internal space S. The second pin hole 42 of the ripper point 12 is arranged in the bottom surface 41a of the guide groove 41. The locking members 14, 114 are arranged in the space that forms the guide groove 41.

[0121] As a result, the locking members 14, 114 can be easily positioned on the ripper shank 11 and the ripper point 12 by positioning the locking members 14, 114 by inserting them into the guide groove 41. From this state, the pin member 13 positioned in the second pin hole 42 can be prevented from coming out by the locking members 14, 114 and placed in a locked state by sliding the locking members 14, 114 along the guide groove 41. In this manner, the ripper point 12 can be easily attached to the ripper shank 11 by the pin member 13.

[0122] Moreover, by sliding the locking members 14, 114 relative to the pin member 13 from the locked state, it is possible to release the prevention of the pin member 13 from coming out. In this manner, the ripper point 12 can be easily removed from the ripper shank 11.

[0123] As described above, in the ripper point mounting structure 6, 106, 206 of this embodiment, the ripper point 12 can be easily attached and detached from the ripper shank 11.

[0124] Furthermore, by sliding the locking members 14 and 114 along the guide groove 41, the locking members 14 and 114 can be engaged with the pin member 13.

[0125] (2) In the ripper point mounting structures 6 and 206 of the first and third embodiments, the lock member 14 engages with the pin member 13 by sliding in a direction toward the pin member 13.

[0126] In this manner, by sliding the locking member 14 along the guide groove 41 toward the pin member 13 , the locking member 14 can be engaged with the pin member 13 .

[0127] (3) In the ripper point mounting structure 106 of the second embodiment, the lock member 114 engages with the pin member 13 by sliding in a direction away from the pin member 13.

[0128] In this manner, by sliding the lock member 114 along the guide groove 41 in a direction away from the pin member 13 , the lock member 114 can be engaged with the pin member 13 .

[0129] (4) In the ripper point mounting structure 6, 106, 206 according to any one of the first, second and third embodiments, the locking member 14, 114 has an engaging portion 61a, 161a that engages with the pin member 13.

[0130] The locking members 14, 114 can engage with the pin member 13 by means of the engagement portions 61a, 161a.

[0131] (5) In the ripper point mounting structure 6, 106, 206 of any one of the first, second and third embodiments, the locking member 14, 114 further has an opening 61b, 161b that guides the pin member 13 to the engagement portion 61a, 161a.

[0132] The lock members 14, 114 can guide the pin member 13 through the openings 61b, 161b to the engagement portions 61a, 161a and engage with the pin member 13 at the engagement portions 61a, 161a.

[0133] (6) In the ripper point mounting structure 6 , 106 , 206 according to any one of the first, second, and third embodiments, the locking member 14 , 114 further has a claw portion 62 .

[0134] By pressing the claw portion 62, the locking members 14, 114 can be easily slid.

[0135] (7) In the ripper point mounting structure 6, 106, 206 according to any one of the first, second and third embodiments, the pin member 13 has an annular groove 13a with which the engaging portion 61a, 161a engages.

[0136] The engagement of the engagement portions 61a, 161a with the annular groove 13a can provide a more secure prevention of dislodging.

[0137] Since the locking members 14, 114 slide in the guide groove 41 to engage with the pin member 13, the annular groove 13a is provided outside the first pin hole 23 and inside the second pin hole 42. This eliminates the need to form a reduced diameter portion for arranging a retainer in a portion of the pin member located inside the pin hole, thereby reducing the risk of breakage.

[0138] (8) In the ripper point mounting structure 6 , 106 , 206 of any of the first, second, and third embodiments, the lock member 14 engages with the pin member 13 between the ripper shank 11 and the ripper point 12 .

[0139] This allows the pin member 13 to be engaged between the ripper shank 11 and the ripper point 12 by the lock member 14. Since the ripper point 12 is disposed on the outside of the engagement portion, it is possible to protect the engagement from soil and sand, etc., and prevent the pin member 13 from coming loose.

[0140] (9) The ripper point attachment structure 206 of the third embodiment is further provided with a guard portion 70 that is disposed on a side surface 11a (an example of an outer surface) of the ripper shank 11 and protects the lock member 14.

[0141] This can prevent soil and sand from colliding with the locking member.

[0142] (10) In the ripper point mounting structure 6, 106, 206 according to any one of the first, second and third embodiments, the ripper shank 11 has a first pin hole 23 (an example of a through hole) in which the pin member 13 is disposed. The first pin hole 23 has an elongated hole shape.

[0143] This allows the pin member 13 to come into contact with the first inner surface 23a of the inner surface of the first pin hole 23 on the tip side of the lip shank 11, but not with the second inner surface 23b on the opposite side to the tip (the main body portion 21 side), thereby forming a gap T between the pin member 13 and the second inner surface 23b.

[0144] Therefore, during excavation work and penetration work by the ripper device 1, the pin member 13 is less likely to come into contact with the main body 21 side of the first pin hole 23. This makes it possible to improve the durability of the pin member 13 and the first pin hole 23.

[0145] (11) The ripper point 12 according to any one of the first, second and third embodiments is a ripper point that can be attached to the ripper shank 11, and includes a ripper point body 40, a guide groove 41 (an example of a recess), and a second pin hole 42 (an example of a through hole). The ripper point body 40 has an opening 40h (an example of an opening) formed at the rear end 40i, and an internal space S formed from the opening 40h toward the tip surface 40g (an example of a tip). The guide groove 41 is formed in a part of the inner surface 40s that forms the internal space S, in a predetermined range from the rear end 40i toward the tip surface 40g. The second pin hole 42 (an example of a through hole) is provided in a bottom surface 41a of the guide groove 41.

[0146] As a result, the locking members 14, 114 can be easily positioned on the ripper shank 11 and the ripper point 12 by positioning the locking members 14, 114 by inserting them into the guide groove 41. From this state, the pin member 13 positioned in the second pin hole 42 can be prevented from coming out by the locking members 14, 114 and placed in a locked state by sliding the locking members 14, 114 along the guide groove 41. In this manner, the ripper point 12 can be easily attached to the ripper shank 11 by the pin member 13.

[0147] Moreover, by sliding the locking members 14, 114 from the locked state, it is possible to release the prevention of the pin member 13 from coming out. In this manner, the ripper point 12 can be easily removed from the ripper shank 11.

[0148] As described above, in the ripper point mounting structure 6, 106, 206 of this embodiment, the ripper point 12 can be easily attached and detached from the ripper shank 11.

[0149] Furthermore, by sliding the locking members 14 and 114 along the guide groove 41, the locking members 14 and 114 can be engaged with the pin member 13.

[0150] <Other embodiments> Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention.

[0151] (A) In the above embodiment, the first pinhole 23 has a cross section perpendicular to the center A3 that is the same size, but both ends in the direction in which the center A3 extends may have a larger diameter than the central portion.

[0152] In the above embodiment, the first pin hole 23 is formed as an elongated hole, but it may be a normal circular hole, such as a first pin hole 23' shown in FIG. 15. The first pin hole 23' is a circle with a constant radius, and unlike the first pin hole 23, the pair of third inner peripheral surfaces 23c is not provided, and the first inner peripheral surface 23a and the second inner peripheral surface 23b are directly connected. The diameter of the first pin hole 23' is formed to be larger than the diameter of the pin member 13.

[0153] (B) In the above embodiment, an example has been shown in which the pin member 13 is prevented from coming off by the lock member 14, but the pin member 13 may be prevented from coming off by using a locking member such as a retainer.

[0154] (C) Although the ripper point mounting structures 6, 106, 206 in the above-described embodiments do not have a configuration for positioning the locking member 14, as shown in Figures 16A and 16B, the ripper point mounting structure 6 may have a configuration for positioning the locking member 14.

[0155] In this case, for example, the ripper shank 11 further has a protrusion 81 or a protrusion 82. The protrusions 81, 82 are provided on the outer surface of the ripper shank 11. The protrusions 81, 82 are formed on the outer surface of the nose portion 22.

[0156] 16A supports the locking member 14, for example, the locking body 61, in the unlocked state. When the ripper point 12 is placed on the ripper shank 11, the protrusion 81 is placed in the guide groove 41 of the ripper point 12. By providing the protrusion 81 on the ripper shank 11 in this manner, the locking member 14 can be easily positioned relative to the ripper shank 11.

[0157] In the locked state, the protrusion 82 in Fig. 16B engages with the locking member 14, for example, the locking body 61. When the ripper point 12 is disposed on the ripper shank 11, the protrusion 82 is disposed in the guide groove 41 of the ripper point 12. By providing the protrusion 82 on the ripper shank 11 in this manner, the locking member 14 can be easily positioned with respect to the ripper shank 11. The ripper point mounting structure 6, 106, 206 may have both the configurations in Fig. 16A and Fig. 16B.

[0158] (D) In the above-mentioned third embodiment, guard portion 70 is provided to guard claw portion 62 and is provided as a separate member from protector 15, but protector 15 and guard portion 70 may be formed as a single member. Also, the shape of guard portion 70 surrounding claw portion 62 is not limited to the rectangular shape shown in Fig. 14A and Fig. 14B, and may be a curved shape.

[0159] (E) In the above-mentioned first to third embodiments, the nose portion 22 is formed with the recess 22f, and the nose portion 22 has the connecting portion 33 having an octagonal cross-sectional shape, but the recess 22f may not be formed. FIG. 17 is a side view showing a ripper point attachment structure 306 provided with a nose portion 322 in which the recess 22f is not formed. In FIG. 17, the ripper point 312 is shown by a dotted line. The above-mentioned convex portion 40f is not formed on the inner surface 340s of the ripper point 312. In addition, the tip surface 322e of the nose portion 322 may not abut against the tip surface 340e of the inner surface 340s.

[0160] (F) In the above embodiment, the first pin hole 23 is provided in the base end portion 32 , but this is not limiting and the first pin hole 23 may be provided in the connecting portion 33 . [Industrial Applicability]

[0161] The ripper point mounting structure and ripper point disclosed herein have the effect of allowing the ripper point to be easily attached and detached, and are useful, for example, as a ripper device for bulldozers and motor graders. [Explanation of symbols]

[0162] 6: Ripper point mounting structure 11: Ripper shank 12: Ripper Point 13: Pin member 14: Locking member 40s: Inside 41: Guide groove 42: Second pin hole

Claims

1. A ripper point mounting structure in a ripper device, A ripper point having a wedge shape from the front end to the rear end; A ripper shank to which the ripper point is attached; A pin member inserted into a first through hole formed in the ripper shank and a second through hole formed in the ripper point; a lock member that is engaged with the pin member and prevents the pin member from coming off, The ripper point has an opening formed at the rear end, an internal space formed from the opening toward the front end, and a recess formed in a predetermined range from the rear end toward the front end in a part of an inner surface forming the internal space, The second through hole of the ripper point is disposed on a bottom surface of the recess, The locking member is disposed in a space that forms the recess, The locking member engages with the pin member by sliding in a direction toward the pin member. Ripper point mounting structure.

2. A ripper point mounting structure in a ripper device, A ripper point having a wedge shape from the front end to the rear end; A ripper shank to which the ripper point is attached; A pin member inserted into a first through hole formed in the ripper shank and a second through hole formed in the ripper point; a lock member that is engaged with the pin member and prevents the pin member from coming off, The ripper point has an opening formed at the rear end, an internal space formed from the opening toward the front end, and a recess formed in a predetermined range from the rear end toward the front end in a part of an inner surface forming the internal space, The second through hole of the ripper point is disposed on a bottom surface of the recess, The locking member is disposed in a space that forms the recess, The locking member engages with the pin member by sliding in a direction away from the pin member. Ripper point mounting structure.

3. The lock member has an engagement portion that engages with the pin member. The ripper point mounting structure according to claim 1 or 2.

4. The locking member further has an opening for guiding the pin member to the engagement portion. The ripper point mounting structure according to claim 3.

5. The locking member further has a claw portion.

5. A ripper point mounting structure according to claim 3 or 4.

6. The pin member has an annular groove with which the engagement portion engages. The ripper point mounting structure according to any one of claims 3 to 5.

7. the locking member engages the pin member between the ripper shank and the ripper point; The ripper point mounting structure according to any one of claims 1 to 6.

8. A ripper point mounting structure in a ripper device, A ripper point having a wedge shape from the front end to the rear end; A ripper shank to which the ripper point is attached; A pin member inserted into a first through hole formed in the ripper shank and a second through hole formed in the ripper point; a lock member that is engaged with the pin member and prevents the pin member from coming off, The ripper point has an opening formed at the rear end, an internal space formed from the opening toward the front end, and a recess formed in a predetermined range from the rear end toward the front end in a part of an inner surface forming the internal space, The second through hole of the ripper point is disposed on a bottom surface of the recess, The locking member is disposed in a space that forms the recess, the locking member engages the pin member between the ripper shank and the ripper point, The locking member is further provided with a guard portion disposed on an outer surface of the ripper shank to protect the locking member. Ripper point mounting structure.

9. A ripper point mounting structure in a ripper device, A ripper point having a wedge shape from the front end to the rear end; A ripper shank to which the ripper point is attached; A pin member inserted into a first through hole formed in the ripper shank and a second through hole formed in the ripper point; a lock member that is engaged with the pin member and prevents the pin member from coming off, The ripper point has an opening formed at the rear end, an internal space formed from the opening toward the front end, and a recess formed in a predetermined range from the rear end toward the front end in a part of an inner surface forming the internal space, The second through hole of the ripper point is disposed on a bottom surface of the recess, The locking member is disposed in a space that forms the recess, the locking member engages the pin member between the ripper shank and the ripper point, The first through hole has an elongated hole shape, and the pin member is disposed in the first through hole. When the pin member is in contact with a first inner circumferential surface of the inner circumferential surface of the first through hole on the tip side of the ripper shank, a gap is formed between the first inner circumferential surface and a second inner circumferential surface on the opposite side to the tip side. Ripper point mounting structure.

10. A ripper point that can be attached to a ripper shank, A ripper point body having an opening formed at a rear end and an internal space formed from the opening toward a tip end; a recess formed in a predetermined range from the rear end to the front end on a part of an inner surface forming the internal space; a through hole provided on a bottom surface of the recess and into which a pin member is inserted; Equipped with The pin member is inserted into the through hole and a through hole formed in the ripper shank, and a lock member is disposed in the recess so as to engage with the pin member and prevent the pin member from coming out. The locking member engages with the pin member by sliding toward or away from the pin member. Rippa point.

11. A locking member that engages with a pin member that detachably fixes a ripper point having an internal space for inserting a ripper shank to the ripper shank to prevent the ripper point from coming off, an engagement portion that engages with the pin member; an opening for guiding the pin member to the engagement portion, The ripper point is disposed in a recess formed in a part of an inner surface forming the internal space, and engages with the pin member by sliding in a direction toward the pin member or in a direction away from the pin member. Locking member.

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