JP3225463U - Attachment coupler, attachment, backhoe - Google Patents

Abstract

Provided is an attachment coupler that can be connected even with a plurality of backhoes each having an attachment connection portion corresponding to a different pin interval and a different pin diameter. A first large backhoe pin support portion (11d1) into which a large backhoe pin (13) having a large backhoe pin diameter is inserted, and a small backhoe pin (14) having a small pin diameter for a small backhoe are inserted. The position corresponding to both the pin spacing of the backhoe pin support 11d2, the pin spacing of the large backhoe pin 13 from the first large backhoe pin support 11d1, and the pin spacing of the small backhoe pin 14 from the small backhoe pin support 11d2. And a second large backhoe pin support 11d3 having the same inner diameter as the first large backhoe pin support 11d1. The large backhoe pin 13 or the small backhoe stepped pin 15 is inserted into the second large backhoe pin support 11d3. [Selection diagram] Fig. 1

Description

  The present invention provides an under-cutter, a tie tamper, a sleeper gripper, an attachment coupler that is provided on various attachment sides such as a bucket, and an attachment coupler to which an attachment coupling portion at the tip of a working arm of a backhoe is coupled, and an attachment having the attachment coupler. About backhoe.

  2. Description of the Related Art Conventionally, at a track maintenance work site or the like, various attachments such as an undercutter, a tie tamper, a sleeper gripper, and a bucket are connected to an end of a work arm of a construction machine called a backhoe through an attachment coupling portion, and various wire maintenance operations are performed. (For example, see Patent Document 1). In such a backhoe, various attachments are mounted by connecting an attachment connecting portion at the tip of a working arm operated by hydraulic pressure or the like to two pins provided on the side of the attachment coupler, and various line keeping operations are performed.

JP-A-2019-0335300

  However, the attachment coupler on the attachment side described in Patent Literature 1 described above usually has an attachment connecting portion that does not correspond to the pin interval because the pin interval is determined according to the size of the backhoe or the attachment. There was a problem that connection was not possible with the backhoe.

  In particular, a large backhoe not only has a large pin interval at the attachment connecting portion at the tip of the working arm, but also has a large pin diameter, while a small backhoe has a pin spacing at the attachment connecting portion at the tip of the working arm. In addition, the pin diameter tends to be small, and it is necessary to prepare a large backhoe and a small backhoe for the same type of attachment, which requires a storage space and increases costs.

  Therefore, the present invention has been made in order to solve such problems, and an attachment coupler that can be connected to a plurality of backhoes each having an attachment connection portion corresponding to a different pin interval and pin diameter, and An object of the present invention is to provide an attachment and a backhoe having the attachment coupler.

In order to solve the above problem, the attachment coupler according to the present invention is provided on the attachment side, and is an attachment coupler to which an attachment connection portion at the tip of the working arm of the backhoe is connected, and has a large pin diameter for a large backhoe. A first large backhoe pin support for inserting and supporting a large backhoe pin; a small backhoe pin support for inserting and supporting a small backhoe pin having a small diameter for the small backhoe; and a first large backhoe for the first large backhoe An inner diameter of the first large backhoe pin support provided at a position corresponding to both a pin interval of the large backhoe pin from the pin support and a pin interval of the small backhoe pin from the small backhoe pin support; And a second large backhoe pin support having the same inner diameter as (2) The large backhoe pin support has a large diameter portion having the same outer diameter as the pin diameter of the large backhoe pin at both ends thereof, or the large backhoe pin has a large diameter portion at both ends. The stepped pin for a small backhoe having a small diameter portion having the same outer diameter as the pin diameter of the small backhoe pin is inserted, and the pin is passed through the first large backhoe pin support and the second large backhoe pin support, respectively. The attachment connecting portion at the distal end of the working arm of the large backhoe is connected via the large backhoe pin, and the small backhoe pin inserted into the small backhoe pin support and the second large backhoe pin support are inserted through the small backhoe pin support. The attachment connecting portion at the tip of the working arm of the small backhoe is connected to the small backhoe stepped pin. The features.
Further, the attachment according to the present invention is characterized by having the above-mentioned attachment coupler.
The backhoe according to the present invention is characterized in that the above-mentioned attachment is mounted.

An attachment coupler, attachment, and backhoe according to the present invention include a first large backhoe pin support, a small backhoe pin support, and a second large backhoe pin support, and a first large backhoe pin. When the large backhoe pin is passed through the support portion and the second large backhoe pin support portion, the attachment connection portion at the tip of the working arm of the large backhoe can be connected.
In addition, the small backhoe pin support is passed through the small backhoe pin, and the second large backhoe pin support has a large diameter portion having the same outer diameter as the pin diameter of the large backhoe pin at both ends, and When the small backhoe stepped pin having a small diameter portion having the same outer diameter as that of the small backhoe pin is passed through the center portion, the attachment connecting portion at the tip of the working arm of the small backhoe can be connected.
Therefore, even with a single attachment, both a large backhoe and a small backhoe having attachment connection portions corresponding to different pin intervals and pin diameters can be connected.

1 is a perspective view of an undercutter, which is an attachment having an attachment coupler according to an embodiment of the present invention. FIG. 2 is a perspective view of the attachment coupler according to the embodiment of the present invention. 2A and 2B are a front view and a plan view of the attachment coupler according to the embodiment of the present invention, respectively. (A), (b) It is the sectional view on the AA line in FIG.3 (b), and the BB line sectional view, respectively. (A)-(c) It is the perspective view, front view, and side view of the pin for large backhoes in the coupler for attachment of embodiment which concerns on this invention, respectively. (A)-(c) It is the perspective view, front view, and side view of the stepped pin for small backhoes in the attachment coupler of embodiment which concerns on this invention, respectively. (A), (b) The whole front view which shows the state which connected the under cutter to the work arm of the large backhoe using the attachment coupler of embodiment which concerns on this invention, respectively, the attachment connection part of a large backhoe, and the coupler for attachments. It is a principal part expanded sectional view which shows the connection state with this. (A), (b) An overall front view showing a state in which an undercutter is connected to a working arm of a small backhoe using the attachment coupler of the embodiment according to the present invention, and an attachment connecting portion of the small backhoe and an attachment coupler. It is a principal part expanded sectional view which shows the connection state with this.

  Next, an embodiment of an attachment coupler, an attachment, and a backhoe according to the present invention will be described with reference to the accompanying drawings. The embodiment described below is merely an example of the present invention, and the present invention is not limited to the embodiment described below, and can be appropriately changed within the technical idea of the present invention. is there.

(Coupler for attachment 1)
As shown in FIG. 1, the attachment coupler 1 of the embodiment is provided on the attachment side of the under cutter 2 or the like, and a work arm of a large backhoe 3 (see FIG. 7) or a small backhoe 3 ′ (see FIG. 8). Attachment connection portions 32, 32 'at the ends of 31, 31' are connected to each other, and a coupler body 11 and a hydraulic connection portion 12 attached to the coupler body 11 and connected to a hydraulic tube (hydraulic tube) from the backhoe 3 are connected. Having.

  The coupler body 11 has a central opening 11a1 as shown in FIGS. 2, 3 (a) and 3 (b) and FIGS. 4 (a) and 4 (b) and a hydraulic connection to which a hydraulic connection 12 is attached. Coupler base 11a having an opening 11a2 for use, and a pair of pairs provided by welding or the like so as to be erected at predetermined intervals via a front relay plate 11b and a rear relay plate 11c on the upper surface side of the coupler main base 11a. It is composed of pin connection plates 11d, 11d.

  As shown in FIG. 5, the pair of pin connecting plates 11d and 11d correspond to the pin interval of the attachment connecting portion 32 at the tip of the work arm 31 of the large backhoe 3 as shown in FIG. The pin interval between the first large backhoe pin support portions 11d1 and 11d1 into which the large backhoe pin 13 is inserted and the attachment connecting portion 32 'at the tip of the work arm 31' of the small backhoe 3 'as shown in FIG. For example, the small backhoe pin 14 corresponding to a pin diameter of, for example, 245 mm and having a pin diameter of 45 mm has the same inner diameter as the small backhoe pin support portions 11d2 and 11d2 and the first large backhoe pin support portions 11d1 and 11d1. 13 as well as the pins of the large backhoe pin 13 at both ends as shown in FIG. The large diameter portions 15a, 15a having the same outer diameter as 50 mm are formed between the large diameter portions 15a, 15a, and a small diameter portion 15b having the same diameter as the pin diameter of the small backhoe pin 14 of 45 mm is formed between the large diameter portions 15a, 15a. The second large backhoe pin support portions 11d3 and 11d3 through which the small backhoe stepped pin 15 is inserted are provided.

  FIGS. 5A to 5C respectively show the large backhoe passed through the first large backhoe pin support portions 11d1 and 11d1 and the second large backhoe pin support portions 11d3 and 11d3 of the attachment coupler 1 of the embodiment. It is a perspective view, front view, and side view of the pin 13 for use.

  As shown in FIGS. 5A to 5C, the large backhoe pin 13 is formed of a cylindrical steel bar having an outer diameter of 50 mm. A pin hole 13a into which a fixing pin (not shown) for fixing the first large backhoe pin support portion 11d1, 11d1 so as not to come off is provided.

  The small backhoe pin 14 is also formed in a cylindrical shape using a cylindrical steel bar having an outer diameter of 45 mm, similarly to the large backhoe pin 13 shown in FIGS. 5 (a) to 5 (c).

  6A to 6C are a perspective view, a front view, and a side view, respectively, of the small backhoe stepped pin 15 passed through the second large backhoe pin support portions 11d3 and 11d3 of the attachment coupler 1 of the embodiment. It is.

  As shown in FIGS. 6A to 6C, the small backhoe stepped pin 15 has a large-diameter portion 15a having the same outer diameter as the 50 mm pin diameter of the large backhoe pin 13 at both ends. On the other hand, a small-diameter portion 15b having the same outer diameter as the pin diameter of the small backhoe pin 14 of 45 mm is formed in the central portion, and the second large backhoe pin support is formed on one of the large-diameter portions 15a. There is provided a pin hole 15a1 into which a fixing pin (not shown) for fixing so as not to fall out of the portions 11d3 and 11d3 is inserted.

(Undercutter 2)
The under cutter 2 is attached to the bottom side of the coupler body base 11a of the attachment coupler 1 as shown in FIG. 1 and the like, and the large backhoe 3 (see FIG. 7) and the small backhoe 3 ′ (see FIG. 8), a plurality of excavating claws 2b provided at predetermined intervals on an infinite belt or the like of the undercutter main body 2a are moved to excavate or scrape crushed stone on a roadbed. This is a well-known attachment for track maintenance work.

<How to Use the Attachment Coupler 1 of the Embodiment>
Next, a method of using the attachment coupler 1 according to the embodiment configured as described above will be described. In the embodiment, a known undercutter 2 is attached to the attachment coupler 1 as an attachment.

(When used for large backhoe 3)
FIGS. 7A and 7B are overall front views showing a state in which the undercutter 2 is connected to the attachment connecting portion 32 at the tip of the working arm 31 of the large backhoe 3 via the attachment coupler 1 of the embodiment. It is a principal part expanded sectional view which shows the connection state.

  When the attachment coupler 1 of the embodiment is used for the large backhoe 3 as shown in FIG. 7A, a pair of pin connection plates 11d of the coupler body 11 of the attachment coupler 1 as shown in FIG. , 11d, and the large backhoe pin 13 passed through the first large backhoe pin support portions 11d1, 11d1, and the large backhoe pin 13 passed through the second large backhoe pin support portions 11d3, 11d3. The undercutter 2 is connected via the attachment coupler 1 of the embodiment by engaging the connection claws 32a, 32b of the attachment connection portion 32 at the tip of the work arm 31.

  In this case, the small backhoe pin 14 may or may not be inserted into the small backhoe pin support portions 11d2 and 11d2.

(When used for small backhoe 3)
FIGS. 8A and 8B respectively show a state in which the undercutter 2 is connected to the attachment connecting portion 32 'at the tip of the working arm 31' of the small backhoe 3 'via the attachment coupler 1 of the embodiment. It is a front view and the principal part expanded sectional view which shows the connection state. The attachment coupler 1 and the undercutter 2 are the same as those used in the large backhoe 3 shown in FIGS. 7A and 7B.

  When the attachment coupler 1 of the embodiment is used for the small backhoe 3 'as shown in FIG. 8A, a pair of pin connecting plates of the coupler body 11 of the attachment coupler 1 as shown in FIG. The large backhoe pin 13 passing through the first large backhoe pin support portions 11d1 and 11d1 of the respective 11d and 11d is not used. Instead, the small backhoe pin 14 is used for the small backhoe pin support portions 11d2 and 11d2. .

  Also, the large backhoe pin 13 is not inserted into the second large backhoe pin support portions 11d3, 11d3, and instead, the small backhoe stepped pin 15 is inserted and used.

  As described above, the small backhoe stepped pin 15 is provided at each end with a large diameter portion 15a that is the same as the pin diameter of the large backhoe pin 13 of 50 mm, while the large diameter portions 15a at both ends are provided. Since the small diameter portion 15b having the same diameter as the pin diameter of the small backhoe pin 14 of 45 mm is provided in the central portion between the small backhoe pins 14, the small backhoe pin support portions 11d3 and 11d3 are provided with small backhoe steps. When the pin 15 is inserted, the large diameter portions 15a, 15a fit into the second large backhoe pin support portions 11d3, 11d3, but the pin diameter of the small backhoe pin 14 is between the pair of pin connecting plates 11d, 11d. The small diameter part 15b which is the same as 45 mm is exposed.

  Therefore, the connecting claws 32a 'and 32b' of the attachment connecting portion 32 'at the tip of the working arm 31' of the small backhoe 3 'are connected to the small backhoe pin 14 passed through the small backhoe pin support portions 11d2 and 11d2, and the second large The undercutter 2 is connected to the small-diameter portion 15b of the small backhoe stepped pin 15 passing through the backhoe pin support portions 11d3 and 11d3, and the undercutter 2 is connected via the attachment coupler 1 of the embodiment to remove crushed stone. Etc. can be performed.

  In this case, the large backhoe pin 13 may or may not be inserted into the large backhoe pin support portions 11d1 and 11d1. In FIG. 8B, the large backhoe pin 13 is still inserted in the large backhoe pin support portions 11d1 and 11d1.

<Summary of Attachment Coupler 1 etc. of Embodiment According to the Present Invention>
As described above, in the attachment coupler 1 of the embodiment according to the present invention, the first large backhoe pin support portions 11d1 and 11d1 into which the large backhoe pin 13 having a large pin diameter for the large backhoe 3 is inserted, The pin interval between the small backhoe pin support portions 11d2 and 11d2 into which the small backhoe pin 14 having a small pin diameter for the small backhoe 3 'is inserted, and the large backhoe pin 13 from the first large backhoe pin support portions 11d1 and 11d1. A second large-sized backhoe pin supporting portion provided at a position corresponding to both the pin spacing of the small backhoe pin from the small backhoe pin supporting portions, and having the same inner diameter as the inner diameter of the first large backhoe pin supporting portion. A second large backhoe having backhoe pin support portions 11d3 and 11d3; The pin support portions 11d3 and 11d3 have large-diameter backhoe pins 13 or large-diameter portions 15a and 15a having the same outer diameter as the large-diameter backhoe pins 13 at both ends, and small-diameter backhoe pins 14 at the center. The stepped pin 15 for the small backhoe having the small diameter portion 15b having the same outer diameter as the diameter of the pin is inserted.

  Therefore, in the large backhoe 3, the connecting claws 32a, 32b of the attachment connecting portion 32 at the tip of the work arm 31 are inserted through the first large backhoe pin support portions 11d1, 11d1 and the second large backhoe pin support portions 11d3, 11d3. By engaging the large backhoe pins 13, 13, an attachment such as the under cutter 2 can be attached via the attachment coupler 1 of the embodiment, and crushed stone removal work and the like can be performed.

  On the other hand, the small backhoe 3 ′ has a small backhoe pin 14 in which the connecting claws 32 a ′ and 32 b ′ of the attachment connecting portion 32 ′ at the tip of the working arm 31 ′ pass through the small backhoe pin support portions 11 d 2 and 11 d 2. (2) The undercutter 2 used in the large backhoe 3 via the attachment coupler 1 of the embodiment by engaging with the small diameter portion 15b of the small backhoe stepped pin 15 passing through the large backhoe pin support portions 11d3 and 11d3. Can be connected to perform crushed stone removal work and the like.

  In the description of the above-described embodiment, the attachment coupler 1 of the undercutter 2 has been described as an example. However, the present invention is not limited to the attachment coupler 1 of the undercutter 2, and the tie tamper, the sleeper gripper, and the bucket may be used. For example, the present invention can be applied to an attachment coupler for various attachments other than the undercutter 2.

  Further, in the description of the above-described embodiment, the two types of backhoes, the large backhoe 3 and the small backhoe 3 ′ having different pin intervals and pin diameters, have been described. It may be configured so that it can be used for a kind of backhoe, that is, for example, a medium-sized backhoe. In this case, the attachment coupler according to the present invention includes a pin interval between the first large backhoe pin support and the pin for the large backhoe pin and a pin interval between the small backhoe pin support and the pin for the small backhoe, and further for a medium-sized backhoe. A second large backhoe pin having an inner diameter equal to the inner diameter of the first large backhoe pin support at a position corresponding to all of the pin intervals of the medium backhoe pin from the medium backhoe pin support to a pin support; The second large backhoe pin support has a large backhoe pin and a large-diameter portion at both ends having the same outer diameter as the pin diameter of the large backhoe pin. A small backhoe stepped pin having a small diameter portion having the same outer diameter as the pin diameter of the small backhoe pin between the large diameter portions of the It may be configured to insert Dekiruru so by replacing each prepared stepped pin Medium backhoe having a small diameter portion of the same outer diameter as the pin diameter of the pin.

DESCRIPTION OF SYMBOLS 1 Attachment coupler 11 Coupler main body 11a Coupler main body base 11a1 Central opening 11a2 Hydraulic connection opening 11b Front relay board 11c Rear relay board 11d, 11d Pin connection board 11d1, 11d1 Pin support for first large backhoe 11d2, 11d2 Small Backhoe pin support portions 11d3, 11d3 Second large backhoe pin support portion 12 Hydraulic coupling portion 13 Large backhoe pin 13a Pin hole 14 Small backhoe pin 15 Small backhoe stepped pin 15a Large diameter portion 15b Small diameter portion 15a1 Pin hole 2 Under cutter (attachment)
3 Large backhoe 31 Work arm 32 Attachment connection part 32a, 32b Connection claw 3 'Small backhoe 31' Work arm 32 'Attachment connection part 32 Attachment connection part 32a', 32b 'Connection claw

Claims (3)

An attachment coupler provided on the attachment side, to which an attachment connection portion at the tip of the working arm of the backhoe is connected.
A first large backhoe pin support for inserting and supporting a large backhoe pin having a large backhoe pin diameter;
A small backhoe pin support for inserting and supporting a small backhoe pin having a small diameter for the small backhoe pin;
The first large backhoe is provided at a position corresponding to both a pin interval between the first large backhoe pin support and the pin for the large backhoe pin and a pin interval between the small backhoe pin support and the pin interval for the small backhoe pin. A second large backhoe pin support having the same inner diameter as the inner diameter of the pin support for
The second large-sized backhoe pin support has a large-diameter portion having the same outer diameter as the large-diameter backhoe pin or at both ends thereof, and between the large-diameter portions at both ends thereof. The small backhoe stepped pin having a small diameter portion having the same outer diameter as the pin diameter of the small backhoe pin is inserted into,
While the attachment connecting portion at the tip of the working arm of the large backhoe is connected via the large backhoe pin passing through the first large backhoe pin support portion and the second large backhoe pin support portion,
The attachment connecting portion at the tip of the working arm of the small backhoe is connected via the small backhoe pin inserted through the small backhoe pin support portion and the small backhoe stepped pin passed through the second large backhoe pin support portion. A coupler for an attachment characterized by being performed.   An attachment comprising the attachment coupler according to claim 1.   A backhoe equipped with the attachment according to claim 2.

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