JP6260336B2 - Work machine, link and adapter support method - Google Patents

Description

The present invention relates to a technology for supporting an adapter for increasing the mounting height of a boom of a work machine in a state where an adapter is lower than a predetermined height.

  Patent Document 1 shows a work machine in which an adapter (19) is detachably mounted on an upper frame (3) using a main bracket (12) and a boom cylinder bracket (13) (see Patent Document 1). (See FIG. 3). In other words, Patent Document 1 discloses a work machine in which an adapter (19) is inserted into a base end portion of a boom (6).

JP 2009-121047 A

  FIG. 1 shows, as an example, a hydraulic excavator 1 in which an adapter 4 is mounted on the base end portion of the main boom 7.

  As shown in FIG. 1, in the hydraulic excavator 1, the adapter 4 for increasing the boom mounting height is normally supported by the link 6 and has an upright state.

  In the upright state, the main boom 7 can be attached to the adapter 4, while the height of the adapter 4 that is the highest point when the excavator 1 is transported (hereinafter referred to as a transportation regulation height). There is a problem that it exceeds that of HT).

  Then, the objective of this invention is providing the technique which can make the highest location of the said adapter lower than predetermined | prescribed height in the working machine provided with an adapter.

  In order to achieve the above object, the present invention provides a work machine, an upper frame and an adapter for increasing a mounting height of a boom, wherein the first state is connected to the upper frame and stands upright. And the adapter is supported in a second state where the highest point of the adapter is lower than the predetermined height by tilting the adapter to the front of the machine body. The first link has a base end portion connected to the upper frame in the second state, and a surface facing the upper side of the distal end portion is below the adapter in the second state. A work machine is provided that is configured to abut against a side facing surface.

  The first link is configured such that the base end portion is connected to the upper frame via a connection pin, and the work machine has the connection pin as a center. It is preferable to further include a rotation preventing means for preventing the rotation of the first link.

  In addition, the rotation preventing means includes a protruding portion in which a part of the base end portion protrudes downward, and the protruding portion engages with a front end portion of the upper frame in the second state. Is preferably configured to prevent rotation of the first link.

  The rotation preventing means includes a plane that forms at least a part of the bottom surface of the base end portion, and the plane touches the flat surface on the upper side of the upper frame in the second state. It is preferable that the first link is prevented from rotating by contact.

The rotation prevention means includes a rotation prevention block provided on a surface facing the lower side of the adapter, and the rotation prevention block in the second state is the front-rear direction of the machine body. It is preferable that the first link is provided on at least one of the front side and the rear side of the distal end portion and prevents the first link from rotating by contacting the distal end portion.

  Further, in the first state, further comprising a second link having one end connected to the upper frame and the other end connected to the adapter using a connection pin, and in the second state, Preferably, the one end side is removed from the upper frame, while the other end side is configured to remain connected to the adapter.

  In the second state, it is preferable to further include a protection member inserted between a surface facing the upper side of the tip portion of the first link and a surface facing the lower side of the adapter.

  Further, the present invention is an adapter for increasing the mounting height of the boom, and in the first state where the boom stands upright, the adapter whose highest part exceeds a predetermined height is tilted forward of the machine body and the highest The link is supported in a second state where the location is lower than the predetermined height, and includes a proximal end portion and a distal end portion, and in the second state, the proximal end portion is connected to the upper frame. On the other hand, there is also provided a link characterized in that a surface facing the upper side of the tip portion is configured to come into contact with a surface facing the lower side of the adapter.

  Further, it is preferable that the surface facing the upper side of the tip end portion is in surface contact with the surface facing the lower side of the adapter.

Further, the present invention is an adapter connected to the upper frame of the work machine in order to increase the mounting height of the boom of the work machine , and the highest part in the first state standing upright exceeds a predetermined height. An adapter supporting method for supporting an adapter by shifting the adapter from a first state to a second state where the highest point is lower than the predetermined height by tilting forward from the machine body , wherein: a) the first In the state, one end side is connected to the upper frame using a connection pin, and the other end side is connected to the adapter from the one end side of the link, and the connection pin is pulled out to connect the one end side from the upper frame. A step of removing; b) inserting the connecting pin into a proximal end portion of a transportation link that supports the adapter in the second state; Attaching to the frame; and c) causing the adapter to transition from the first state to the second state, with the surface facing the top side of the transport link contacting the surface facing the bottom side of the adapter There is also provided an adapter support method characterized by comprising the steps of:

  Further, the boom supporting method includes: d) a step of connecting a tip of a cylinder for operating the boom that is detachable to the adapter to the adapter via a connecting member; and e) the step removed at step a). It is preferable to further include a step of connecting the one end side of the link to a tip end portion of the cylinder via a connecting member.

  According to the work machine of claim 1, in the second state in which the highest point of the adapter is lower than the predetermined height, the surface facing the upper side of the tip of the first link that supports the adapter is the adapter. Abuts on the surface facing downward. Therefore, it is possible to make the highest part of the adapter lower than a predetermined height.

  According to the work machine of the second aspect, it is possible to prevent the first link from rotating around the connecting pin.

  According to the work machine of the third aspect, since the protrusion provided at the base end of the first link engages with the front end of the upper frame, the first link rotates in the forward direction. In particular, it can be prevented.

  According to the work machine of the fourth aspect, since the flat surface constituting at least a part of the bottom surface of the base end portion of the first link abuts against the flat surface on the upper side of the upper frame, the first link In particular, it is possible to prevent the rotation in the rearward direction.

  According to the work machine of the fifth aspect, since the rotation prevention block is provided on at least one of the front side and the rear side of the front end portion of the first link, the rotation of the first link in the forward direction It is possible to prevent one or both of the rotation in the backward direction.

  According to the work machine of the sixth aspect, in the second state, one end side of the second link is removed from the upper frame, while the other end side of the second link is maintained connected to the adapter. Configured to be Therefore, in the second state in which the adapter is supported by the first link, it is not necessary to take the trouble of removing the other end side of the second link from the adapter.

  According to the work machine according to claim 7, since the protective member is inserted between the surface facing the upper side of the tip of the first link and the surface facing the lower side of the adapter, the lower surface of the adapter Can be prevented from being damaged.

  According to the link of the eighth aspect, in the second state in which the highest point of the adapter is lower than the predetermined height, the surface facing the upper side of the tip portion contacts the surface facing the lower side of the adapter. Therefore, it is possible to support the adapter more easily than when the tip is connected to the adapter via a connection pin. That is, in a work machine including an adapter, it is possible to improve work efficiency when the highest part of the adapter is made lower than a predetermined height.

  According to the link of the ninth aspect, since the surface facing the upper side of the tip is configured to come into surface contact with the surface facing the lower side of the adapter, the adapter can be supported more stably. .

  According to the adapter support method of the tenth aspect, in the second state where the highest point of the adapter is lower than the predetermined height, the surface facing the upper side of the tip end abuts on the surface facing the lower side of the adapter. Therefore, it is possible to support the adapter more easily than when the tip is connected to the adapter via a connection pin. That is, in a work machine including an adapter, it is possible to improve work efficiency when the highest part of the adapter is made lower than a predetermined height.

  According to the adapter support method of the eleventh aspect, since the main link removed from the upper frame is fixed to the cylinder via the connecting member, the main link is rotated and the transportation of the work machine is hindered. Can be prevented.

The figure which shows the hydraulic excavator by embodiment of this invention. The figure which shows the state before removing the base end part of this link. The figure which shows the state after removing the base end part of this link. The figure which shows the state which attached the base end part of the link for transport to the upper frame. The figure which shows the state by which the adapter was supported by the link for transportation. The enlarged view which shows the link for transportation. The enlarged view which shows the link for transportation and the rotation prevention block which concern on a modification. The enlarged view which shows the link for transportation which concerns on a modification. The enlarged view which shows the shape of the upper frame which concerns on a modification. The front view of the hydraulic shovel main body of FIG.

<1. Embodiment>
A working machine according to an embodiment of the present invention will be described with reference to FIGS. Hereinafter, a hydraulic excavator will be described as an example of a work machine.

  As shown in FIG. 1, the hydraulic excavator 1 includes a crawler type lower traveling body 2 and an upper swing body 3.

  The upper swing body 3 is mounted on the lower travel body 2 and can swing around the vertical axis with respect to the lower travel body 2.

  As shown in FIG. 1, the upper swing body 3 includes an adapter 4, an upper frame 5, a main boom 7, and the like.

  The adapter 4 is a member that is additionally inserted into a base end portion (also referred to as a main boom foot) of the main boom 7, and is attached to the upper frame 5.

  As shown in FIG. 1, the adapter 4 is normally supported by the link 6 and has an upright state.

  The link 6 is a link that supports the adapter 4 by straddling the adapter 4 and the upper frame 5. Specifically, the link 6 is configured such that the base end portion is connected to the upper frame 5 via the connection pin PN1 and the distal end portion is connected to the adapter 4 via the connection pin PN2. Has been.

  The main boom 7 is a boom that can be attached to and detached from the adapter 4 and includes a boom cylinder 70.

  As described above, in a state where the adapter 4 stands upright (hereinafter also simply referred to as the state ST1), the highest portion of the adapter 4 exceeds the transportation restriction height HT and the hydraulic excavator 1 cannot be transported. There was a problem.

  Therefore, in the present embodiment, by adopting the adapter support method described below, the adapter 4 is supported in a state where the adapter 4 is lower than the transportation restriction height HT.

  Specifically, as shown in FIG. 2, first, the tip 71 of the boom cylinder 70 and the connection portion CN1 of the adapter 4 with the main boom 7 are connected using the chain block CB, and the boom cylinder 70 is connected. To fix.

  Thereafter, as shown in FIG. 2, the wire WR is attached to the connection portion CN <b> 1, the adapter 4 is suspended upward, and the connection pin PN <b> 1 inserted into the base end portion 62 of the link 6 is removed. Then, as shown in FIG. 3, the base end portion 62 of the main link 6 is retracted in front of the main body of the hydraulic excavator 1, and the base end portion 62 of the main link 6 and the tip end portion 71 of the boom cylinder 70 are connected to the chain block. The main link 6 is fixed by connecting with CB. The base end portion 62 of the main link 6 is removed from the upper frame 5, while the front end portion 61 of the main link 6 remains connected to the adapter 4.

  Next, as shown in FIG. 4, the base end portion of the transport link 8 is connected to the upper frame 5. For the connection of the transport link 8, a connection pin PN <b> 1 that connects the base end 62 of the link 6 to the upper frame 5 is used.

  Thereafter, as shown in FIG. 5, the adapter 4 is gradually tilted forward of the main body of the excavator 1 so that the front end of the transport link 8 is positioned on the lower surface 41 (FIG. 6) of the adapter 4 (both the belly of the adapter 4). Called). As a result, while the adapter 4 is supported by the transportation link 8, the highest portion of the adapter 4 can be set to the transportation regulation height HT or less. Hereinafter, for simplification of description, the state in which the adapter 4 is tilted forward of the main body of the excavator 1 so that the highest part of the adapter 4 falls below the transport restriction height HT is also simply referred to as a state ST2.

  FIG. 6 is an enlarged view of the area AR1 shown in FIG. As shown in FIG. 6, the transport link 8 is configured such that a surface 81 facing the upper side of the tip end portion abuts on a surface 41 facing the lower side of the adapter 4. Specifically, as shown in FIG. 6, the surface 81 facing the upper end of the transport link 8 is in surface contact with the surface 41 facing the lower side of the adapter 4 through a protective member PT such as rubber or cloth. Is configured to do. Here, both the surface 81 facing the upper side of the front end portion of the transport link 8 and the surface 41 facing the lower side of the adapter 4 are configured as flat surfaces. Further, the transport link 8 is shorter than the main link 6.

  As shown in FIG. 6, the transport link 8 includes a protruding portion 82 in which a part of the base end portion is protruded downward. The protrusion 82 is configured to prevent the transport link 8 from rotating in the forward direction TN1 by engaging with the front end 51 of the upper frame 5 in the state ST2.

  Further, the base end portion of the transport link 8 is also provided with a plane 83 that prevents the transport link 8 from rotating in the backward direction TN2 by abutting against the upper flat surface of the upper frame 5. Composed. The flat surface 83 constitutes a part of the bottom surface at the proximal end portion of the transportation link 8.

  As described above, the protrusion 82 and the flat surface 83 function as a rotation preventing unit that prevents the transportation link 8 from rotating.

  As described above, in the present embodiment, as shown in FIG. 6, in the state ST <b> 2 where the adapter 4 is tilted forward, the surface 81 facing the upper side of the distal end portion of the transport link 8 that supports the adapter 4 is It abuts on the lower surface 41 of the adapter 4. Therefore, in the excavator 1 including the adapter 4, the highest portion of the adapter 4 can be made lower than the transportation restriction height HT.

  FIG. 10 is a front view showing a state where the main boom 7 is removed from the excavator 1 of FIG. As shown in FIG. 10, there are two insertion holes for connecting pins that connect the adapter 4 and the distal end portion 61 of the link 6 on the left and right. In addition, there are two insertion holes for connecting pins for connecting the upper frame 5 and the base end portion 62 of the link 6 on the left and right.

  In the present embodiment, as shown in FIG. 5, in the state ST <b> 2, the base end portion 62 of the main link 6 is removed from the upper frame 5, while the front end portion 61 of the main link 6 is connected to the adapter 4. Maintained.

  For this reason, in the present embodiment, it is only necessary to remove two connection pins at the base end in the work of removing the link 6. Moreover, what is necessary is just to attach the pin for a connection in two places of a base end part also in the attachment operation | work of the transport link 8. FIG. Furthermore, since the state in which the distal end portion of the main link 6 is attached to the adapter 4 is maintained, there is no need to separately transport the main link 6.

  In particular, in the above embodiment, since the surface 81 facing the upper side of the transport link 8 is configured to come into surface contact with the surface 41 facing the lower side of the adapter 4, the adapter 4 is supported in a very stable state. Is possible.

  Further, as shown in FIG. 6, since the protective member PT is inserted between the surface 81 facing the upper side of the tip of the transport link 8 and the surface 41 facing the lower side of the adapter 4, the lower side of the adapter 4 It is possible to prevent the surface 41 from being damaged.

  Further, as shown in FIG. 6, since the protrusion 82 provided at the base end portion of the transport link 8 engages with the front end portion 51 of the upper frame 5, the rotation of the transport link 8 in the forward direction TN1 is performed. It is possible to prevent movement.

  Further, since the flat surface 83 constituting a part of the bottom surface of the base end portion of the transport link 8 abuts against the flat surface on the upper side of the upper frame 5, the transport link 8 rotates in the backward direction TN2. Can be prevented.

  As shown in FIG. 4, the tip 71 of the boom cylinder 70 is connected to the connection CN1 of the adapter 4 via the chain block CB, and the base end 62 of the link 6 is connected via the chain block CB. Connected to the tip 71 of the boom cylinder 70. Therefore, it is possible to prevent the link 6 from rotating and hindering the transportation of the hydraulic excavator 1.

<2. Modification>
The working machine and the link according to the present invention are not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims.

  For example, in the above embodiment, as illustrated in FIG. 6, the case where the protrusion 82 and the plane 83 are provided as the rotation preventing means is illustrated, but the present invention is not limited to this, and as illustrated in FIG. You may make it provide the rotation prevention blocks 43a and 43b in the surface 41 of the side. As shown in FIG. 7, the rotation prevention blocks 43 a and 43 b are provided on both the front side and the rear side of the front end portion of the transport link 85 in the front-rear direction of the main body of the excavator 1. What is necessary is just to prevent rotation of the said transport link 85 by contact | abutting. Alternatively, only the rear rotation prevention block 43a may be provided on the assumption that the protrusion 82 of the above embodiment is also provided, and the flat surface 83 of the above embodiment is formed on the upper flat surface of the upper frame 5. Only the front rotation prevention block 43b may be provided on the premise of contact.

  Moreover, in the said embodiment, as shown in FIG. 6, although the case where the plane 83 which comprises about half of the base end part of the transport link 8 was comprised as a rotation prevention means was illustrated, it is not limited to this. For example, as shown in FIG. 8, the bottom surface of the transport link 86 may be extended to the rear side, and a plane 84 having a larger area than the plane 83 may be configured as rotation preventing means. According to this, since the area which contacts the upper flat surface of the upper frame 5 increases, it is possible to more reliably prevent the transport link 86 from rotating.

  Moreover, in the said embodiment, as shown in FIG. 6, the projection part 82 is provided in the base end part of the transport link 8, the said projection part 82 is engaged with the front-end part of the upper frame 5, and the said transport link 8 is provided. However, the present invention is not limited to this. For example, as shown in FIG. 9, the front end portion of the upper frame 5 is extended forward, and the bottom surface of the transport link 87 and the surface facing the upper side of the upper frame 5 are brought into contact with each other to rotate the transport link 87. May be prevented.

  Moreover, in the said embodiment, although the case where the thought of this invention was applied to the hydraulic excavator 1 was illustrated, it is not limited to this, You may apply to other work machines (demolition machine etc.) with which an adapter is mounted | worn. .

  As described above, the work machine according to the present invention is suitable, for example, for a hydraulic excavator equipped with an adapter.

1 Hydraulic excavator, 2 Lower traveling body, 3 Upper turning body, 4 Adapter,
5 upper frame, 6 links, 7 main boom, 8 transport links,
43a, 43b anti-rotation block, 51 front end,
61 Tip, 62 Base, 70 Boom cylinder, 71 Tip, 82 Projection,
83,84 plane, 85 transport link, 86 transport link, 87 transport link,
AR1 area, CB chain block, CN1 connection part,
PN1, PN2 pin, PT protection member, WR wire

Claims (11)

A working machine,
An upper frame,
An adapter for increasing the mounting height of the boom, the adapter being connected to the upper frame and having the highest part in a first state in which the boom is upright exceeds a predetermined height;
A first link that supports the adapter in a second state in which the adapter is tilted forward of the machine body so that the highest point of the adapter is lower than the predetermined height;
With
In the second state, the first link is connected so that the base end portion is connected to the upper frame, and the surface facing the upper side of the tip portion contacts the surface facing the lower side of the adapter. A work machine characterized by comprising. The work machine according to claim 1,
The first link is configured such that the base end portion is connected to the upper frame via a connection pin,
The work machine further includes a rotation preventing unit that prevents the first link from rotating about the connection pin. The work machine according to claim 2,
The rotation preventing means includes a protruding portion in which a part of the base end portion protrudes downward,
In the second state, the protrusion is configured to prevent rotation of the first link by engaging with a front end portion of the upper frame. In the work machine according to claim 2 or claim 3,
The rotation preventing means includes a plane constituting at least a part of the bottom surface of the base end portion,
In the second state, the flat surface is configured to prevent the first link from rotating by abutting against an upper flat surface of the upper frame. . The work machine according to any one of claims 2 to 4,
The rotation prevention means includes a rotation prevention block provided on a surface facing the lower side of the adapter,
In the second state, the rotation prevention block is provided on at least one of the front side and the rear side of the front end in the front-rear direction of the machine body , and comes into contact with the front end so that the first link A work machine configured to prevent rotation of the machine. The work machine according to any one of claims 1 to 5,
In the first state, further comprising a second link having one end connected to the upper frame using a connection pin and the other end connected to the adapter;
In the second state, the work machine is configured to maintain the state where the one end side is removed from the upper frame and the other end side remains connected to the adapter. The work machine according to any one of claims 1 to 6,
In the second state, the working machine further includes a protection member inserted between a surface facing the upper side of the tip portion of the first link and a surface facing the lower side of the adapter. An adapter for increasing the mounting height of the boom of the work machine, and in the first state of standing upright, the adapter whose highest part exceeds a predetermined height is tilted forward of the machine body, and the highest part is A link supporting in a second state below a predetermined height,
A proximal end and a distal end,
In the second state, the base end portion is configured to be connected to the upper frame, and a surface facing the upper side of the tip end portion is in contact with a surface facing the lower side of the adapter. Link characterized by being done. In the link of claim 8,
The link characterized by the above-mentioned. The link which is comprised so that the surface which faces the upper side of the said front-end | tip part may surface-contact with the surface which faces the lower side of the said adapter. An adapter connected to the upper frame of the work machine in order to increase the mounting height of the boom of the work machine, the adapter having the highest point in the first state standing upright exceeding a predetermined height in the first state. An adapter support method for supporting the transition by shifting to the second state in which the highest point is tilted forward from the state of the machine body below the predetermined height,
a) One end side is connected to the upper frame using a connection pin in the first state, and the other end side is connected to the adapter from the one end side of the link to remove the connection pin. Removing the side from the upper frame;
b) inserting the connecting pin into a base end portion of a transport link that supports the adapter in the second state, and attaching the base end portion to the upper frame;
c) transitioning the adapter from the first state to the second state, abutting the surface facing the upper side of the tip of the transportation link with the surface facing the lower side of the adapter;
An adapter support method comprising: The adapter support method according to claim 10, wherein
d) connecting a tip portion of a cylinder for operating the boom detachable to the adapter to the adapter via a connecting member;
e) connecting the one end side of the main link removed in step a) to the tip of the cylinder via a connecting member;
An adapter support method, further comprising:

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