Jaw and jaw assembly having the jaw

Abstract

To provide a jaw part having a center tooth that is replaceable and not damaged even when an object has a high hardness.SOLUTION: A jaw part according to the present disclosure includes a body part, wherein the body part includes: a housing part that houses a first side tooth, a second side tooth, and a center tooth; a first distal end hole on a distal end side of one side surface of the housing part; and a second distal end hole on a distal end side of the other side surface of the housing part. The housing part includes a pressure receiving surface that is flat in a longitudinal direction, a center tooth has a center tooth hole, the center tooth pin is inserted into the first distal hole, the second distal hole, and the center tooth hole, and the center tooth can rotate around the center tooth pin. When the center tooth is housed in the housing part, a top surface of the center tooth contacts the pressure receiving surface.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to the field of disintegration tools for crushing and / or cutting materials, and more particularly to a jaw having replacement parts for such disintegration tools and a jaw assembly having the jaw.

Background Art

[0002] A prior art disintegration tool for crushing and / or cutting materials (simply referred to as an object) is disclosed in Patent Document 1. The disintegration tool disclosed in Patent Document 1 includes a jaw assembly having a lower jaw portion and an upper jaw portion. The upper jaw portion and the lower jaw portion are rotatably connected and movable relative to each other. The object is crushed or cut by closing the upper jaw portion and the lower jaw portion, for example, using a hydraulic actuator.

[0003] The jaw assembly is suitable for crushing and / or cutting (simply referred to as disintegrating) objects such as concrete or other objects (for example, scrap iron). The center teeth and side teeth provided on the upper jaw portion and / or the lower jaw portion come into contact with the object, causing rapid wear.

[0004] Therefore, the jaw assembly of Patent Document 1 enables the replacement of the center teeth and side teeth.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The jaw assembly of Patent Document 1 has the following problems when the hardness of the object is high.

[0007] FIG. 8 is a schematic perspective view of the jaw assembly 100 of Patent Document 1. As shown in FIG. 8, the jaw assembly 100 includes a first jaw (lower jaw) 102, a second jaw (upper jaw) 108, and a connecting portion 150. The first jaw 102 and the second jaw 108 are rotatable about the connecting portion 150.

[0008] The first jaw 102 has first side teeth 113 and second side teeth 111 on both sides, and a center tooth 110 between the first side teeth 113 and the second side teeth 111.

[0009] FIG. 9 is a schematic exploded perspective view of the first jaw 102. As shown in FIG. 9, the center tooth 110 is inserted into the space between the first arm 132 and the second arm 134 by being moved in the vertical direction. Specifically, the center tooth 110 is inserted in such a manner that the first mounting leg portion 116 and the second mounting leg portion 118 are respectively disposed in front of the first mounting structure 124 and the second mounting structure 126 in the longitudinal direction of the first arm 132 and the second arm 134. In the first stage of attaching the center tooth 110, the first mounting leg portion 116 and the second mounting leg portion 118 slide the center tooth 110 along the longitudinal direction (attachment direction) of the first arm 132 and the second arm 134 to attach the center tooth 110 to the first jaw 102. Then, the center tooth 110 is inserted into the space between the first arm 132 and the second arm 134 so that the center tooth 110 is disposed in front of the first mounting structure 124 and the second mounting structure 126 in the attachment direction.

[0010] In the second stage, after the center tooth 110 is inserted between the first arm 132 and the second arm 134, the center tooth 110 is moved rearward along the mounting direction so that the first mounting leg 116 meshes with the first mounting structure 124. The same applies to the second mounting leg 118. By sliding the center tooth 110 in the mounting direction, the first mounting structure 124 is inserted into the first recess 120, and the second mounting structure 126 is inserted into the second recess 122 (see FIG. 10). That is, the center tooth 110 moves along the mounting direction until the rear surface of the hook-shaped portion 119b abuts against the second mounting structure 126, and the end of the first mounting leg 116 contacts the plate-like first mounting structure 124 (see FIG. 11). At this position, each of the hook-shaped portions 119a, 119b, and 119c contacts the second mounting structure 126 in the second recess 122.

[0011] As shown in FIG. 11, the contact area between the first mounting leg 116 of the center tooth 110 and the first mounting structure 124 is a limited area at the center. As shown in FIG. 10, the contact areas between the hook-shaped portions 119a, 119b, and 119c of the second mounting leg 118 and the second mounting structure 126 are also limited areas. Therefore, in the jaw assembly 100 of Patent Document 1, when the hardness of the object is high and the object is disassembled, since the contact area is small, the first mounting leg 116 and the hook-shaped portions 119a, 119b, and 119c are damaged, and there is a problem that the center tooth 110 is broken. In view of the above problems, the present disclosure provides a jaw having a center tooth that is replaceable and not damaged even when the hardness of an object is high, and a jaw assembly having the jaw.

Means for Solving the Problems

[0012] The jaw according to one aspect of the present disclosure is a jaw used for one of a pair of jaws of a jaw assembly that disassembles an object, and includes a first side tooth and a second side tooth disposed on both sides, a center tooth disposed between the first side tooth and the second side tooth, and a main body portion. The main body portion houses the first side tooth, the second side tooth, and the center tooth, and has a housing portion for housing the center tooth, a first tip hole at the tip side of one side surface of the housing portion, and a second tip hole at the tip side of the other side surface of the housing portion. The housing portion has a pressure-receiving surface that is flat in the longitudinal direction. The center tooth has a center tooth hole at the tip side. A center tooth pin is inserted into the first tip hole, the second tip hole, and the center tooth hole, and the center tooth is rotatable about the center tooth pin. When the center tooth is housed in the housing portion, the upper surface of the center tooth contacts the pressure-receiving surface. According to the above aspect, since the contact area between the upper surface of the center tooth and the pressure-receiving surface is large, it is possible to provide a jaw having a center tooth that is replaceable and not damaged even when the hardness of the object is high.

Effect of the Invention

[0013] According to one aspect of the present disclosure, it is possible to provide a jaw having a center tooth that is replaceable and not damaged even when the hardness of the object is high, and a jaw assembly including the jaw.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0015] Hereinafter, more specific embodiments of the present disclosure will be described. However, detailed descriptions that are more than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid making the following description unnecessarily redundant and to facilitate the understanding of those skilled in the art. The inventors provide the accompanying drawings and the following description so that those skilled in the art can fully understand the present disclosure, and do not intend to limit the subject matter described in the claims by these. In the following description, the same or similar components are denoted by the same reference numerals.

[0016] (Embodiment 1) Hereinafter, the jaw assembly 1 showing one aspect of the present disclosure will be described with reference to the drawings.

[0017] FIG. 1 is a schematic perspective view of a jaw assembly 1 showing one aspect of the present disclosure. As shown in FIG. 1, the jaw assembly 1 includes a first jaw portion 2 (upper jaw portion) and a second jaw portion 3 (lower jaw portion). The first jaw portion 2 and the second jaw portion 3 are connected by a connecting portion 15, and the distance between the first jaw portion 2 and the second jaw portion 3 can be narrowed or widened around the connecting portion 15, for example, by using a hydraulic actuator. FIG. 2 is a schematic exploded perspective view of the jaw assembly 1. The first jaw portion 2 has a main body portion 20, a first side tooth 11, a second side tooth 12, a center tooth 10 between the first side tooth 11 and the second side tooth 12, and a first connecting pin hole 25. The second jaw portion 3 has a third side tooth 13, a fourth side tooth 14, and a second connecting pin hole 26. The connecting pin 16 holds a connecting bush 17 at the central portion and fits into the second connecting pin hole 26. The connecting bush 17 fits into the first connecting pin hole 25. With this configuration, the first jaw portion 2 and the second jaw portion 3 are connected by the connecting portion 15 and rotate around the connecting portion 15.

[0018] As shown in FIG. 2, the first side tooth 11 has a plurality of (three in FIG. 2) triangular first teeth 55 on the upper surface of the substrate 60 and a first fixing hole 61 and a second fixing hole 62 on the lower surface of the substrate 60.

[0019] FIG. 3 is a schematic overall perspective view and an exploded perspective view of the first jaw portion 2. FIG. 3(a) is a schematic overall perspective view of the first jaw portion 2, and FIG. 3(b) is a schematic exploded perspective view of the first jaw portion 2. As shown in FIG. 3(a), the first side tooth 11 is accommodated in the first side tooth accommodating portion 33, and the second side tooth 12 is accommodated in the second side tooth accommodating portion 43. As shown in FIG. 3(b), the first side tool housing portion 33 is box-shaped with a hollow interior and has a rectangular opening 29 with an edge on the upper surface. When the first side tool 11 is stored in the first side tool housing portion 33, the first fixing hole 61 and the second fixing hole 62 of the first side tool 11 are stored in the first side tool housing portion 33. At that time, the first fixing hole 61 communicates with the first sheet hole 31, and the second fixing hole 61 communicates with the second sheet hole 31. Then, the substrate 60 of the first side tool 11 contacts the edge of the opening 29. In this state, when the side tool pin 35 is inserted into the first sheet hole 31 and the second sheet hole 32, the first side tool 11 is fixed to the first side tool housing portion 33 (see FIGS. 1 and 3).

[0020] Similar to the first side tool 11, the second side tool 12, the third side tool 13, and the fourth side tool 14 each have a plurality of (three in FIG. 2) triangular first tools 55 on the upper surface of the substrate 60 and have the first fixing hole 61 and the second fixing hole 62 on the lower surface of the substrate 60 (see FIG. 2). Each of the second side tool housing portion 43, the third side tool housing portion 44, and the third side tool housing portion 45 is box-shaped with a hollow interior, similar to the first side tool housing portion 33, and has a rectangular opening 29 with an edge on the upper surface. Similar to the first side tool 11, the second side tool 12, the third side tool 13, and the fourth side tool 14 each bring their respective substrates 60 into contact with the edges of their respective openings 29. Then, the side tool pin 35 is inserted into the first sheet hole 31, and the side tool pin 35 is also inserted into the second sheet hole 32, so that each of the second side tool 12, the third side tool 13, and the fourth side tool 14 is fixed to each of the second side tool housing portion 43, the third side tool housing portion 44, and the fourth side tool housing portion 45 (see FIGS. 1 and 3).

[0021] FIG. 4 is an operation diagram showing the operation of the jaw assembly 1. Figure 4(a) is a diagram showing a state in which the first jaw portion 2 and the second jaw portion 3 are opened and the object W is sandwiched between the first jaw portion 2 and the second jaw portion 3. Specifically, the center tooth 10 of the first jaw portion 2, the third side tooth 13, and the fourth side tooth 14 sandwich the object W. Figure 4(b) is a diagram showing a state in which the first jaw portion 2 and the second jaw portion 3 are closed. When viewed from the front in the longitudinal direction of the first jaw portion 2, the first tooth 55 of the first side tooth 11 and the first tooth 55 of the third side tooth 13 overlap. And when viewed from the longitudinal direction of the first jaw portion 2, the first tooth 55 of the second side tooth 12 and the first tooth 55 of the fourth side tooth 14 overlap. The lower part of the center tooth 10 is a cavity, and there is no first tooth 55 facing the center tooth 10.

[0022] Figure 5 is a diagram showing the positional relationship between the first jaw portion 2 and the center tooth 10. As shown in FIGS. 5(a) and 5(b), the main body portion 20 of the first jaw portion 2 has a housing portion 70 that houses the center tooth 10 inside the main body portion 20. The housing portion 70 has a pressure receiving surface 71 that is flat in the longitudinal direction on the upper surface, and the lower surface facing the pressure receiving surface 71 is open. Further, the housing portion 70 has a rear chamber 72 at the rear.

[0023] The positioning between the housing portion 70 and the center tooth 10 will be described. The center tooth 10 has an end portion 59 that extends rearward (see FIGS. 3(b) and 5). The center tooth 10 is inserted from the lower surface of the housing portion 70, the end portion 59 of the center tooth 10 is inserted into the rear chamber 72 of the housing portion 70, and the right end portion of the center tooth 10 is supported in the rear chamber 72.

[0024] As shown in FIG. 5(b), when the center tooth 10 and the object W are in contact and the crushing force P of the object is applied to the rear end tooth 58 described later, the distance A between the pressure receiving surface 71 and the center C0 of the center tooth spindle 50 is set so that the pressure receiving surface 71 and the upper surface 30 of the center tooth 10 are in uniform contact over a large area. Insert the center two-tooth spindle 50 with the center bush 51 into the first tip hole 21, the second tip hole 22, and the center two-tooth hole 23 so that the center two-tooth 10 can rotate. Then, position the accommodating portion 70 and the center two-tooth 10 with a single center two-tooth spindle 50 with a center bush 51, so that the pressure-receiving surface 71 and the upper surface 30 of the center two-tooth 10 are in contact with each other over a uniformly large area. With the above configuration, since the pressure-receiving surface 71 and the upper surface 30 of the center two-tooth 10 are in contact with each other over a uniformly large area, even when the hardness of the object W is high, the center two-tooth 10 can operate without being damaged. Also, if the single center two-tooth spindle 50 is removed, the center two-tooth 10 can be easily removed from the accommodating portion 70, so that the center two-tooth 10 can be easily replaced.

[0025] As shown in Fig. 5(b), the second two-tooth 56 of the center two-tooth 10 has a tip tooth 57 with a sharp tip on the tip side and a rear end tooth 58 on the rear side. The tooth tip of the rear end tooth 58 has an S-shaped configuration having a concave portion and a convex portion in order from the tip side. With the above configuration, after crushing a part of the object W with the convex portion of the rear end tooth 58, the object W is crushed while being held by the concave portion, so that the object W can be efficiently disassembled.

[0026] (Embodiment 2) For the first jaw portion 2 of Embodiment 1, accuracy of the distance A between the pressure-receiving surface 71 and the center C0 of the center two-tooth spindle 50 is required. Fig. 5(c) is a schematic cross-sectional view of the first jaw portion 2 with poor accuracy of the distance A. That is, the distance B between the pressure-receiving surface 71 and the center C1 of the center two-tooth spindle 50 is longer than the distance A. As shown in the enlarged view of Fig. 5(c), it can be seen that as the upper surface 30 of the center two-tooth 10 moves to the left side, it moves away from the pressure-receiving surface 71, and the contact area between the pressure-receiving surface 71 and the upper surface 30 of the center two-tooth 10 becomes smaller. As described above, for the first jaw portion 2 of Embodiment 1, accuracy of the distance A is required, and there is still room for improvement.

[0027] Fig. 6 is a schematic cross-sectional view of the first jaw portion 2 in Embodiment 2. Embodiment 2 is different from Embodiment 1 in that an eccentric bush 53 is used instead of the center bush 51 of the first jaw portion 2 of Embodiment 1. Hereinafter, as an example, numerical values will be used for explanation, but this is for illustrative purposes only, and the numerical values can be changed as appropriate.

[0028] As shown in Fig. 6(a), an eccentric bush 53 is inserted into the center tooth hole 23 of the center tooth 10. Fig. 6(b) is a diagram showing an example of the eccentric bush 53. As shown in Fig. 6(b), the eccentric bush 53 has an eccentric bush hole 54 into which the center tooth pin 50 is inserted. The distance L0 between the center C1 of the eccentric bush 53 and the center C2 of the eccentric bush hole 54 is offset by approximately 3 mm on a straight line L1 extending from the upper left to the lower right at an angle of 42 degrees from the horizontal. In this state, the width of the upper left of the eccentric bush 53 on the straight line L1 is 5 mm, and the width of the lower right is 11 mm. The eccentric bush hole 54 rotates about the center C1 of the eccentric bush 53.

[0029] A method (assembly method) of attaching the center tooth 10 of Embodiment 2 to the housing portion 70 will be described with reference to Fig. 7. Fig. 7(a) is a diagram showing a state in which the center tooth 10 is inserted into the housing portion 70 with the first jaw portion 2 and the second jaw portion 3 open and the first jaw portion 2 and the second jaw portion 3 not in contact with the object W. At this time, in the eccentric bush 53, as in Fig. 6(b), the center C2 of the center tooth pin 50 is located on a straight line L1 inclined 42 degrees from the horizontal about the center C1 of the eccentric bush 53. The center C2 of the center tooth pin 50 is located 52 mm below the pressure receiving surface 71, and the center C1 of the eccentric bush 53 is located 54 mm below the pressure receiving surface 71. Therefore, the distance L0 between the center C1 of the eccentric bush 53 and the center C2 of the center tooth pin 50 is 2 mm in the vertical direction and approximately 3 mm on the straight line L1 inclined 42 degrees. The pressure-receiving surface 71 and the upper surface 30 of the center tooth 10 have a gap of 4 mm. The end 59 of the center tooth 10 and the side surface of the inner chamber 72 are separated by a distance of 21 mm and are non-contact.

[0030] Next, as shown in Fig. 7(b), without rotating the eccentric bush 53, the distance between the first jaw portion 2 and the second jaw portion 3 is narrowed, and the rear end tooth 58 of the center tooth 10 is brought into contact with the object W. At this time, the center tooth 10 rotates in the direction of arrow A about the center C2 of the center tooth spindle 50, and the right end of the upper surface 30 of the center tooth 10 comes into contact with the pressure-receiving surface 71. At the left end of the pressure-receiving surface 71, the pressure-receiving surface 71 and the upper surface 30 of the center tooth 10 have a gap of 4 mm.

[0031] Finally, as shown in Fig. 7(c), the eccentric bush 53 is rotated counterclockwise by 84 degrees from the initial position. Then, the center tooth 10 moves in the direction of arrow B, and the pressure-receiving surface 71 and the upper surface 30 of the center tooth 10 are uniformly in contact without a gap. At this time, the contact area between the upper surface 30 of the center tooth 10 and the pressure-receiving surface 71 is larger than the contact area between the first side tooth 11 and the first side tooth accommodating portion 33, or the contact area between the second side tooth 12 and the second side tooth accommodating portion 43. According to the above aspect, the accuracy of the distance between the pressure-receiving surface 71 and the center of the center tooth spindle 50 is not required, and the center tooth 10 can be easily installed in the accommodating portion 70. In addition, since the area of the pressure-receiving surface is large, it is possible to crush even a hard object without breaking the center tooth 10.

[0032] In addition, in the first and second embodiments, the first jaw portion 2 is the upper jaw portion and the second jaw portion 3 is the lower jaw portion, but the first jaw portion 2 may be the lower jaw portion and the second jaw portion 3 may be the upper jaw portion.

[0033] In addition, the inventions according to the first and second embodiments can be replaced or combined as long as there is no contradiction.

[0034] As described above, the present disclosure includes the jaw portions described in the following items and the jaw assembly including the same.

[0035] 〔Item 1〕 A jaw used for one of a pair of jaws of a jaw assembly for disassembling an object, comprising a first side tooth and a second side tooth disposed on both sides, a center tooth disposed between the first side tooth and the second side tooth, and a main body portion, The main body portion houses the first side tooth, the second side tooth, and the center tooth, has a housing portion for housing the center tooth, a first tip hole on the tip side of one side surface of the housing portion, and a second tip hole on the tip side of the other side surface of the housing portion, The housing portion has a pressure-receiving surface that is flat in the longitudinal direction, The center tooth has a center tooth hole on the tip side, A center tooth pin is inserted into the first tip hole, the second tip hole, and the center tooth hole, and the center tooth is rotatable about the center tooth pin, A jaw in which, when the center tooth is housed in the housing portion, the upper surface of the center tooth contacts the pressure-receiving surface. According to the above aspect, even when the hardness of the object is high, the center tooth can operate without being damaged. Also, if one connecting pin is removed, the center tooth can be removed from the housing portion, so the center tooth can be easily replaced.

[0036] 〔Item 2〕 The main body portion further has a first side tooth housing portion for housing the first side tooth on the side surface of the housing portion on the first tip hole side, and a second side tooth housing portion for housing the second side tooth on the side surface of the housing portion on the second tip hole side, The jaw according to Item 1, wherein the area where the upper surface of the center tooth contacts the pressure-receiving surface is larger than the area where the first side tooth contacts the first side tooth housing portion or the area where the second side tooth contacts the second side tooth housing portion. According to the above aspect, even when the hardness of the object is high, the center tooth can operate without being damaged.

[0037] 〔Item 3〕 The jaw according to item 1 or 2, having an eccentric bush disposed in the first tip hole, the second tip hole, and the center-to-tooth hole, into which a center-to-tooth pin is inserted. According to the above aspect, the accuracy of the distance between the pressure receiving surface and the center of the center-tooth pin is not required, and the center-tooth can be easily installed in the accommodating portion.

[0038] 〔Item 4〕 The teeth of the center-tooth have tip teeth with sharp tips on the tip side and rear teeth on the rear side, The jaw according to any one of items 1 to 3, wherein the tooth tip of the rear tooth has an S-shaped form having a concave portion and a convex portion in order from the tip side. According to the above configuration, after crushing a part of the object W with the convex portion of the rear tooth, the object W is crushed while being held by the concave portion, so that the object W can be efficiently disassembled.

[0039] 〔Item 5〕 A jaw assembly having the jaw according to any one of items 1 to 4 and another jaw different from the jaw, the jaw and the other jaw constituting a pair of jaws, and the jaw and the other jaw being disposed opposite to each other. According to the above configuration, it is possible to provide a jaw assembly in which the center-tooth can operate without being damaged even when the hardness of the object is high. Also, since the center-tooth can be removed from the accommodating portion by removing one connecting pin, it is possible to provide a jaw assembly in which the center-tooth can be easily replaced.

Explanation of Signs

[0040] 1 Jaw assembly 2 First jaw 8 Second jaw 10 Center-tooth 11 First side-tooth 12 Second side-tooth 13 Third side-tooth 14 Fourth side-tooth 20 Body portion 21 First tip hole 22 Second tip hole 23 Center-tooth hole Upper surface of the center tooth 33 First side tooth housing part 43 Second side tooth housing part 50 Center tooth spool 53 Eccentric bush 57 Tip tooth 58 Rear end tooth 70 Housing part 71 Pressure receiving surface

Claims

1. A jaw portion used for one of a pair of jaws of a jaw assembly for disassembling an object, comprising a first side tooth and a second side tooth arranged on both sides, a center tooth arranged between the first side tooth and the second side tooth, and a main body portion, the main body portion houses the first side tooth, the second side tooth, and the center tooth, has a housing portion for housing the center tooth, a first tip hole at the tip side of one side surface of the housing portion, and a second tip hole at the tip side of the other side surface of the housing portion, the housing portion has a pressure-receiving surface that is flat in the longitudinal direction, the center tooth has a center tooth hole at the tip side, a center tooth pin is inserted into the first tip hole, the second tip hole, and the center tooth hole, and the center tooth is rotatable about the center tooth pin, a jaw portion in which, when the center tooth is housed in the housing portion, the upper surface of the center tooth contacts the pressure-receiving surface.

2. the main body portion further has a first side tooth housing portion for housing the first side tooth on the side surface of the housing portion on the first tip hole side, and a second side tooth housing portion for housing the second side tooth on the side surface of the housing portion on the second tip hole side, The jaw portion according to claim 1, wherein the area where the upper surface of the center tooth contacts the pressure-receiving surface is larger than the area where the first side tooth contacts the first side tooth housing portion or the area where the second side tooth contacts the second side tooth housing portion.

3. The jaw portion according to claim 1 or 2, further comprising an eccentric bush arranged in the first tip hole, the second tip hole, and the center tooth hole and into which the center tooth pin is inserted.

4. The teeth of the center tooth have a pointed tip tooth at the tip side and a rear end tooth at the rear side, The jaw portion according to claim 1 or 2, wherein the tooth tip of the rear end tooth has an S-shaped configuration having a concave portion and a convex portion in order from the tip side.

5. A jaw assembly comprising the jaw portion according to claim 1 or 2 and another jaw portion different from the jaw portion, the jaw portion and the another jaw portion constituting a pair of jaws, and the jaw portion and the another jaw portion being arranged to face each other.

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