JP5616849B2 - Attachment connection frame - Google Patents

Description

  The present invention relates to an attachment connection frame used for a front loader.

  As shown in Patent Document 1, a front loader that performs earth removal work, snow removal work, etc. pivotally supports the left and right sides of an adapter (attachment connection frame) at the tip of a boom that is pivotally supported by a mobile machine body. The cylinder interlocking arm connected to the center in the left-right direction can change the angle around the horizontal axis, and the front working device (attachment) such as bucket or fork is made up of the left and right lower connecting parts and the central upper connecting part provided on the front side of the adapter. ) Is detachably attached.

  In the adapter, left and right lower connection portions are connected by a round pipe-shaped frame body (support frame), and an upper connection portion is provided at the center of the frame body.

Japanese Unexamined Patent Publication No. 2-47431

In the prior art, the left and right lower connecting portions and the center upper connecting portion are connected by a frame main body, and these protrude greatly from the frame main body in the front-rear direction or the vertical direction, and the protruding free end sides are interconnected. Not. For this reason, the left and right lower connecting portions and the center upper connecting portion have to be uniquely attached to the frame main body, and the structure is complicated and expensive.
An object of this invention is to provide the attachment connection frame which enabled it to solve such a problem of a prior art.

  An object of the present invention is to provide an attachment connection frame that can be manufactured easily and inexpensively with a structure having sufficient strength, by providing a frame body with a construction material for connecting the center upper connection part and the left and right lower connection parts. And

Specific means for solving the problems in the present invention are as follows.
First, it has a boom-side pivoting portion 12 that can be pivotally attached to the boom 3 via the horizontal shaft 32 at the left and right lower portions of the back surface, and is connected to the cylinder 4 via a pin 33 at the midway height in the middle of the back and left direction. An attachment connection frame for connecting the attachment 7 having the possible cylinder side connection portion 13 to the boom 3 and the cylinder 4,
A frame body 20 having a length extending between the left and right ends of the pair of left and right boom members 3A of the boom 3;
A central upper connecting portion 22 that engages the cylinder side connecting portion 13 of the attachment 7 formed by providing an upper connecting pin 36 instead of the pin 33 on the front side of the frame body 20 from below, and this upper connecting portion. A left and right lower connecting portion 21 for mounting the left and right boom-side pivoting portion 12 of the attachment 7 lifted up by the portion 22 with a horizontal connecting pin 35 instead of the horizontal shaft 32 ;
A cylinder connecting portion 24 pivotally connected to the cylinder 4 via the pin 33 on the rear side of the center upper connecting portion 22 on the rear side of the frame body 20, and the boom 3 on the rear side of the left and right lower connecting portion 21. A left and right boom pivot support portion 23 pivotally connected to the tip of the first through the horizontal shaft 32 ,
The construction material 25 is connected to the upper part of the center upper connection portion 22 that is spaced upward from the frame body 20, and both left and right ends of the construction material 25 are connected to the left and right lower connection portions 21.

Secondly, the frame body 20 is formed of a pipe member 20a that is long in the left-right direction, and a pair of vertical plate members 22a is fixed in an upward projecting manner at the center in the left-right direction of the pipe member 20a, and an upper portion of the pair of vertical plate members 22a. Forming the upper connecting portion 22 on the front side and the cylinder connecting portion 24 on the rear side,
A pair of horizontal plate members 21a are protruded and fixed to the left and right ends of the pipe member 20a, the lower connecting part 21 is formed on the front side, and the boom pivot part 23 is formed on the rear side.
The erection material 25 is formed in a frontal portal shape, the center of which is substantially parallel to the frame body 20 and connected to the upper part of the vertical plate member 22a , and the left and right ends are bent and connected to the horizontal plate member 21a. It is characterized by that.

Third, the pair of vertical plate members 22a are wider side after the interval is coupled via a narrow and cylinder 4 and the pin 33 the front side to engage with the cylinder-side coupling portion 13 of the attachment 7,
A pair of horizontal plate members 21a of the left and right, after which the intervals are connected via the tip and the lateral axis 32 of the front and narrow and left and right boom member 3A which is connected to the left and right boom side pivot portion 12 of the attachment 7 The side is widely formed.

According to the present invention, a structure having a sufficient strength can be manufactured easily and inexpensively by providing a construction material for connecting the central upper connecting portion and the left and right lower connecting portions.
That is, the invention according to claim 1 has a central upper connecting portion 22 and a left and right lower connecting portion 21 on the front side of the frame main body 20, and a cylinder connecting portion 24 and a left and right boom pivot supporting portion 23 on the rear side of the frame main body 20. By connecting the center upper connecting portion 22 and the left and right lower connecting portions 21 with the erection material 25, a structure having sufficient strength can be manufactured easily and inexpensively.

  According to the second aspect of the present invention, a pair of vertical plate members 22a are fixed in an upward projecting shape at the center of the pipe member 20a, and an upper connecting portion 22 and a cylinder connecting portion 24 are formed on the front and rear of the upper member 22a. A pair of horizontal plate members 21a are protruded and fixed to the left and right ends of each, and a lower connecting portion 21 and a boom pivot support portion 23 are formed on the front and rear sides thereof, and a portal-type erection member 25 is connected to them to provide sufficient strength. The structure having the above can be manufactured easily and inexpensively.

  In the invention according to claim 3, the pair of vertical plate members 22a and the pair of horizontal plate members 21a on the left and right sides have a simple structure with sufficient strength by forming a narrow front side and a wide rear side. Can be manufactured at low cost.

1 is an overall perspective view showing an embodiment of the present invention. It is a side view of the principal part. It is the cross-sectional side view cut in the boom position. It is the cross-sectional side view which carried out the cross section in the boom cylinder position. It is the whole perspective view seen from back upper. It is a disassembled perspective view of the principal part seen from the front upper direction. It is a disassembled perspective view of the principal part seen from back upper direction. FIG. It is a rear view of a mounting body. It is a front view of a connection frame.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a front loader mounted on a mobile machine body 31 such as a tractor, and a blade device (attachment) 7 that performs snow removal work, soil removal work, and the like is connected to a tip of a boom 3 (attachment connection frame). 6 is detachably mounted.
The boom 3 of the front loader 1 has a pair of left and right bow-shaped boom members 3A connected by a horizontal connecting member 3B, and the base ends of the left and right boom members 3A are pivotally supported by a mast mounted on a mobile body 31. It can be raised and lowered by a boom cylinder provided between the two.

  1 to 10, the distal end portion 3Aa of the left and right boom member 3A has a horizontal shaft 32 made of a pin for rotatably connecting the connecting frame 6, and the horizontal connecting member 3B has one attachment in the center in the left-right direction. The cylinder 4 is pivotally supported, and the tip of the cylinder rod of the attachment cylinder 4 is connected to the connection frame 6 via a pin 33, and the connection frame 6 can be rotated around the horizontal axis 32 by the expansion and contraction of the attachment cylinder 4.

  When the attachment is a bucket, the bucket has a left and right lower connection portion connected to the tip 3Aa of the boom member 3A via a horizontal shaft 32 at the left and right lower portions of the back surface, and is located in the middle in the vertical direction at the center in the left and right direction of the back surface. It has a central connecting portion that is connected to the attachment cylinder 4 via a pin 33 and can connect the bucket to the tip of the boom 3 so as to be rotatable around the horizontal axis 32 without using the connecting frame 6. it can.

The connection frame 6 is used to easily attach and detach a plurality of types of attachments. The attachment that can be connected to the boom 3 and the attachment cylinder 4 can be connected to the connection frame 6. It can be connected to the attachment cylinder 4.
A blade device (attachment) 7 supports a blade 2 having a front surface formed in an arc concave shape in a longitudinal section and a mounting portion 2A provided at a lower portion of the back surface, and the mounting portion 2A of the blade 2 so that the angle can be changed around the vertical axis. And a mounting body 5 that is mounted on the left and right distal ends of the boom 3 that can be moved up and down and is rocked about the horizontal axis by a cylinder 4 at the center in the left-right direction of the boom 3.

In the blade 2, four reinforcing rib plates 2C in the left-right direction are welded to the back surface of a horizontally long plate 2B having a circular arc cross section, and a pair of upper and lower plates are welded to the lower portions of the two central reinforcing rib plates 2C. A portion 2A is formed, and a vertically penetrating hole is formed in the mounting portion 2A so that the vertical axis 15 can be inserted.
The mounting body 5 includes a main body portion 11 having a length extending between left and right ends of the boom 3, boom-side pivoting portions 12 provided on both left and right sides of the main body portion 11, and a central rear side in the left-right direction of the main body portion 11. And a cylinder side connecting portion 13 provided in a protruding shape higher than the left and right boom side pivoting portions 12, and a mounting portion 2 </ b> A of the blade 2 provided in a protruding shape on the front side in the horizontal direction of the main body portion 11. And a blade support portion 14 supported so that the angle can be changed around the vertical axis 15.

In the mounting body 5, the boom-side pivoting portion 12 at the lower left and right sides of the main body 11 can be pivotally connected to the boom 3 via a horizontal shaft 32, and the cylinder-side coupling portion 13 is connected to the cylinder 4 via a pin 33. The mounting body 5 of the blade device 7 can also be directly connected to the boom 3 and the cylinder 4.
The blade support portion 14 is formed with a hole that can be inserted from the rear between the upper and lower plate members of the attachment portion 2 </ b> A of the blade 2 and through which the vertical axis 15 can be inserted. By inserting the blade support portion 14 into the attachment portion 2A and inserting the longitudinal axis 15 through them, the blade 2 is connected to the mounting body 5 so as to be rotatable around the longitudinal axis 15.

  Between the blade support portion 14 and the attachment portion 2A of the blade 2, angle setting means 16 for setting an angle around the vertical axis of the blade 2 is provided. In the angle setting means 16, a plurality of setting holes 16a are arranged in an arc on the upper and lower plate members of the mounting portion 2A around the insertion hole for the longitudinal axis 15, and the blade support portion 14 has at least one hole facing the setting hole 16a. 14a is formed, and the inclination angle of the blade 2 is set by inserting the setting pin 34 into the hole 14a and the setting hole 16a facing the hole 14a at a position where the blade 2 is rotated around the vertical axis 15. The angle of the blade 2 can be changed from a posture facing forward until the back surface approaches the boom-side pivoting portion 12.

The main body part 11 is a horizontally long member, and is formed in a hollow shape with a longitudinal and horizontal plate material fixed to the back surface of the front plate 11a in a rib shape. The front plate 11a has a mountain shape at the top and has an upper edge on the upper edge. A reinforcing member 17 is provided along the lower part, and the center of the lower part protrudes downward. The blade support part 14 is fixed to the protruding front face.
Two side plates 12a are fixed to the left and right end portions of the front plate 11a of the main body portion 11 so as to protrude rearward, and the lateral connection pins 35 are detachably provided to form the boom side pivoting portion 12, and the main body portion. 11 is fixed in an upward projecting manner at the center in the left-right direction, and an upper connection pin 36 is provided by projecting the upper part backward to form a cylinder side connection portion 13. The character-shaped member 13a and the outer side plate 12a of each of the left and right boom-side pivoting portions 12 are reinforced and connected by the reinforcing member 17.

The reinforcing member 17 is formed of a band plate or a pipe material, and is inclined downward from the cylinder side connecting portion 13 to the left and right boom side pivoting portion 12. The main body 11 and the left and right reinforcing members 17 are substantially triangular when viewed from the front.
Since the blade 2 has an arc shape in the longitudinal section, the upper and lower center of the back surface protrudes rearward from the upper and lower end portions, and the cylinder side connecting portion 13 has a height substantially opposite to the protruding upper and lower center of the blade 2 back surface. The boom-side pivoting portion 12 faces the left and right lower portions of the blade 2 where the blade 2 does not protrude.

  If the reinforcing member 17 is horizontally extended from the left and right center facing the projecting upper and lower center of the blade 2 to the left and right sides, the angle of the blade 2 can be changed only around the vertical axis until the upper and lower center is close to the reinforcing member 17. When the reinforcing member 17 is inclined downward from the left and right center to the left and right sides, the left and right side portions face the left and right lower portions where the blade 2 does not protrude, and the left and right center portions where the blade 2 protrudes are the reinforcing member 17. The angle of the blade 2 can be changed so as to overlap the upper part of the front loader (shown in FIGS. 2 and 5), and the inclination angle of the blade 2 with respect to the front-rear direction of the front loader 1 can be further increased.

  In order to increase the inclination angle of the blade 2, the distance from the main body portion 11 to the vertical axis 15 may be increased. However, the strength of the blade support portion 14 must be improved. By tilting the reinforcing member 17 downward from the left and right center to both left and right sides, the maximum tilt angle of the blade 2 can be increased as much as possible without increasing the distance from the main body 11 to the vertical axis 15.

2 to 4, the mounting body 5 has the blade support portion 14 disposed substantially horizontally, and the upper connection pin 36 is positioned on the blade 2 side with respect to the lateral connection pin 35, and the cylinder side connection portion 13 and the reinforcement are provided. The member 17 is located on the blade 2 side from the boom side pivoting portion 12, and the mounting body 5 is in a forward leaning posture in a side view.
A connecting frame 6 is provided between the mounting body 5, the boom 3 and the cylinder 4, and the connecting frame 6 is provided on the front side of the frame body 20 on the left and right lower connecting parts for mounting the left and right boom side pivoting parts 12. 21 and a central upper connecting portion 22 to which the cylinder side connecting portion 13 is attached.

The connecting frame 6 has a frame main body 20 having a length extending between the left and right ends of the boom 3, and is connected to the front side of the frame main body 20 while engaging the cylinder side connecting portion 13 of the attachment 7 from below. Part 22 and left and right lower connecting parts 21 to which the left and right boom side pivoting parts 12 of the attachment 7 lifted up by the upper connecting part 22 are mounted.
On the rear side of the frame main body 20, a cylinder connecting portion 24 that is pivotally connected to the cylinder 4 on the rear side of the center upper connecting portion 22, and is pivotally supported on the tip of the boom 3 on the rear side of the left and right lower connecting portion 21. The frame main body 20 has a central upper connecting portion 22 and a left and right lower connecting portion 21 connected by a construction material 25.

The frame body 20 is formed of a circular or square pipe member 20a that is long in the left-right direction, and a pair of vertical plate members 22a are fixed in an upward projecting shape at the center in the left-right direction of the pipe member 20a. A letter-shaped or substantially U-shaped receiving plate 22b is fixed to form the upper coupling part 22, and the cylinder coupling part 24 into which the pin 33 can be inserted is formed on the rear side of the upper part.
The pair of vertical plate members 22a are bent in the opposite direction in the middle of the front and rear, and the front upper connecting portion 22 is narrow and the rear cylinder connecting portion 24 is wide. The receiving plate 22b of the upper connecting portion 22 is engaged with and engaged with an upper connecting pin 36 provided on the cylinder side connecting portion 13 of the mounting body 5 from below, and the cylinder connecting portion 24 is a cylinder of the cylinder 4. The pin 33 is inserted through the rod 33 and connected.

A pair of horizontal plate members 21a are protruded and fixed to the left and right ends of the pipe member 20a of the frame body 20, respectively, the lower connecting portion 21 is formed on the front side, and the boom pivot portion 23 is formed on the rear side. .
The left and right pair of horizontal plate members 21a are bent in the opposite direction in the middle of the front and rear, and the space between the front lower connecting portion 21 is narrow and the rear boom pivot portion 23 is wide.

The lower connecting portion 21 is fitted into the boom side pivoting portion 12 of the mounting body 5 and can be connected via the lateral connecting pin 35, and the boom pivot supporting portion 23 is fitted to the tip portion 3Aa of the boom member 3A. Connection is possible via a horizontal shaft 32.
The erection material 25 is formed by bending a band plate to form a frontal portal type, the center of which is welded and connected to the pair of vertical plate members 22a, and the left and right ends are welded to the outer plates of the left and right horizontal plate members 21a. Are connected.

The attachment operation of the attachment 7 to the front loader 1 is performed by first fitting the distal end portion 3Aa of the boom member 3A to the left and right boom pivot support portions 23 of the connection frame 6 and connecting them by the horizontal shaft 32, and attaching the attachment cylinder to the cylinder connection portion 24. 4 cylinder rods are connected by pins 33, and the connecting frame 6 is connected to the boom 3 and the attachment cylinder 4.
An attachment 7 in which the attachment portion 2A of the blade 2 is connected to the mounting body 5 via the vertical axis 15 is arranged on the ground, and the cylinder side connection portion 13 of the mounting body 5 is moved downward by the upper connection portion 22 of the connection frame 6. In this state, the boom 3 is slightly raised, and the attachment 7 is lifted and swung around the upper connecting portion 22, and the left and right lower connecting portions 21 of the connecting frame 6 and the left and right boom sides of the mounting body 5. The pivot attachment part 12 is opposed to each other, and a horizontal connection pin 35 is inserted and connected to both.

In the present invention, the shape of each member and the positional relationship between the front, rear, left, and right in the embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the blade 2 of the blade device 7 supports the lower portion of the back surface of the plate 2B on the mounting portion 2A via the horizontal axis, and a tension spring is installed between the upper portion of the back surface of the plate 2B and the mounting portion 2A, so that the plate 2B Then, during the pushing operation, it may be configured to be able to swing at a constant angle about the horizontal axis.

DESCRIPTION OF SYMBOLS 1 Front loader 2 Blade 3 Boom 4 Cylinder 5 Attachment body 6 Connection frame 7 Blade apparatus 11 Main body part 12 Boom side pivoting part 13 Cylinder side connection part 16 Angle setting means 17 Reinforcement member 20 Frame main body 21 Lower connection part 22 Upper connection part 23 Boom pivot 24 Cylinder connection 25 Construction material 32 Horizontal shaft 33 Pin 34 Setting pin 35 Horizontal connection pin 36 Upper connection pin

Claims (3)

The boom (3) has a boom-side pivoting portion (12) that can be pivotally attached to the boom (3) via a horizontal shaft (32) at the lower left and right lower portions, and a pin ( 33) an attachment connection frame for connecting an attachment (7) having a cylinder side connection portion (13) connectable via a boom (3) and a cylinder (4),
A frame body (20) having a length extending between left and right ends of a pair of left and right boom members (3A) of the boom (3);
A center engaging the cylinder side connecting portion (13) of the attachment (7) formed by providing an upper connecting pin (36) instead of the pin (33) on the front side of the frame body (20) while scrambling from below. Instead of the horizontal shaft (32), the horizontal connecting pin (35) is replaced with the left and right boom side pivot (12) of the attachment (7) scooped up by the upper connecting portion (22). ) And the left and right lower connecting portions (21) to be attached,
A cylinder connecting portion (24) pivotally connected to the cylinder (4) via the pin (33) on the rear side of the central upper connecting portion (22) on the rear side of the frame body (20); A left and right boom pivot (23) pivotally coupled to the tip of the boom (3) via the horizontal axis (32) on the rear side of the lower coupling (21);
An erection material (25) is connected to the upper part of the central upper connection part (22) that is separated upward from the frame body (20), and the left and right ends of the erection material (25) are connected to the lower left and right connection part (21). An attachment connection frame characterized by that. The frame body (20) is formed of a pipe member (20a) that is long in the left-right direction, and a pair of vertical plate members (22a) are fixed in an upward projecting manner at the center in the left-right direction of the pipe member (20a). Forming the upper connecting part (22) on the front side of the upper part of the plate (22a) and forming the cylinder connecting part (24) on the rear side;
A pair of horizontal plate members (21a) are protruded and fixed to the left and right ends of the pipe member (20a), the lower connecting portion (21) is formed on the front side, and the boom pivot portion (23) is formed on the rear side. Forming,
The erection material (25) is formed in a frontal portal shape, the center thereof is substantially parallel to the frame main body (20), and is connected to the upper part of the vertical plate material (22a) , and the left and right ends are bent to form the horizontal plate material. The attachment connection frame according to claim 1, wherein the attachment connection frame is connected to (21 a). The pair of vertical plate members (22a) has a narrower front side that is engaged with the cylinder side connecting portion (13) of the attachment (7) and is connected to the cylinder (4) via the pin (33). Widely formed,
The left and right pair of laterally plate (21a), the tip and the horizontal axis of the left and right boom side pivot portion of the spacing attachment (7) (12) front the narrow and left and right boom member connected with (3A) The attachment connecting frame according to claim 2 , wherein the rear side connected via (32) is formed wide.

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